Technical Services


Sales Service

Fu Chun Shin is mainly engaged in the research and development, manufacturing, assembly, sales of injection molding machine, and supply of peripheral equipment of injection molding, injection molding molds, gas assisted injection equipment, IML, and PET preform turnkey production system. In other words, we provide total solutions as an expert in injection molding.

Presently, Fu Chun Shin (FCS) is not representing any other brand, and all machines sold by us are 100% under the FCS brand.

Please refer to our「Global Marketing Network」section of this website regarding our global sales service centers and for detailed information.

Fu Chun Shin (FCS) has offices and plants in Dongguang, Guangdong and Ningbo City, Chejiang, and we have 30 service centers covering northern, eastern, and southern China, offering fast and effective services. For details please refer to the「Global Marketing Network」section of this website.

Injection molding machines built by Fu Chun Shin have a 1-year warranty period, counting from the date of arrival at customers' plants. For structural casting, it is 2 years. For detailed warranty items and charging standards, please contact your sales representative or fill in the「 Inquiry Letter

In addition to basic equipment maintenance services, we can provide technical trainings, routine inspection and testing services, parts preferential programs, professional mold testing services, and indefinite technical and management symposiums. Please refer to the 「 News」section of this website.

We are a member of the Taiwan Turnkey-Project Association listed under Ministry of Economic Affairs. In turnkey projects, we have the professional capability in planning and many years of experience. When you have major investment projects, we can provide you with turnkey solutions, for selection of machinery, automation peripherals, production planning, and training to cost-effectiveness analysis. Our professionalism and experience will be the best assurance of your investments. For more information please contact us or fill in the 「 Inquiry Letter」.

Fu Chun Shin (FCS) has achieved the ISO-9001 Certification, and its products have won the CE MARK certification as well as "It’s very well made in Taiwan" and "Excellent R&D and Innovative Products Award" since 2001 Taipei International Rubber and Plastic Exhibition. The quality is widely recognized. Details of the Awards are available in the「 Development Process」and「 Quality Assurance」section of this Website.

In order to meet the diversified needs of customers, Fu Chun Shin (FCS) has developed many series of injection molding machine. In total there are 11 product series, providing different performance and characteristics. The properties of various series are:
The suitable products and industries for each series are:
‧HT Series:It is standard and conventional equipment. The applicable industries include general household hardware products, electronic information product housings, automobile parts, general lenses, frames, etc.
‧LM Series:It is medium and large-sized plastic parts molding equipment. It is applicable to automotive industry such as bumper and instrument panel, air-conditioner compressor housing, and even pallet over 3000 tons .
‧AF Series:It is ultra-high-speed/thin-sheet molding equipment. Its applicable industries include precision electronic products, light guide plates, belts, etc.
‧AH Series:High-speed/thin-sheet molding equipment, applicable industries include thin-walled food containers, aviation cups and other products.
‧AD Series:It is multi-loop injection molding equipment, which is suitable for cap production, furniture hardware and other industries.
‧HT-P Series:It is PET preform equipment, which is suitable for mineral water, carbonated beverages, fruit juices, edible oils, medicine jars and lotions, cosmetic packaging containers, etc.
‧HN-h/p Series:It is high-performance version of conventional equipment. Its applicable industries include high-end household goods, thin-walled food containers, high-speed molding of multi-cavity products.
‧FB-R Series:It is rotary table two-component injection molding equipment. It is suitable for two-component and multi-component products, including automotive lamp housing, livelihood supplies, etc.
‧FB-T Series:The rotary shaft two-component injection molding equipment, which is suitable for two-component products covering the penetration, including tool handles, buttons, handles and other products.
‧FB-C Series:It is sandwich/interval injection molding equipment, which is suitable for producing two-component sandwich, interval, pattern and other products.
‧HB-R Series:It is large injection molding equipment, which is suitable for large-scale home appliances and panels, automotive skylights, lights, corner windows and other two-component production.
‧HN-U Series:It is thermosetting injection equipment, which is suitable for electrical parts, pistons, appliance handles, etc.
‧BMC Series:It is BMC injection molding equipment, which is suitable for automotive parts, electronics industry, home appliances, housing and parts of communication equipment.
‧HR Series:It is rubber injection molding equipment, which is suitable for producing O-rings, washers, keyboards, rollers, shock-proof rubber, dust-proof bushings, etc.
In addition to building injection molding machines, we also developed Gas Assisted Injection Molding units (GU Series) and PET perform and light guiding board molds, and any kinds of injection molding peripherals, to offer you with diversified choices. . Please refer to the 「 Product」section of this website.

Our AF Series is a high speed close loop hybrid injection molding machine. The main features is adopting AC Servo motor feeding for reducing energy consumption, increase feeding accuracy and forming a two loop system. Concurrent compound motion is applied to shorten molding cycle. In other words, hybrid injection molding machines improves upon conventional hydraulic, energy dependent and low precision injection machines at cost less than all-electric injection molding machines. It also greatly reduces pollution and noise. In fact, statistically, 45% of European, American and Japanese makers are presenting hybrid machines, such as HUSKY of Canada, ARBURG, DEMAG, KRAUSS-MAFFEI of Germany, SANDRETTO of Italy, even JSW, SODICK, TOSHIBA and MEIKI of Japan are offering hybrid machines. It is clear that matching feeding system to electric servo motor driving design is popular in advanced countries. For details of AF Series, please refer to the Products section of this website.

The clamping force of Fu Chun Shin (FCS) units are built to the requirements of customers. Presently, the highest is 4000 tons. However, upon demand by customers, we can build higher tonnage units. For super large injection molding machines, please refer to the「 LM Series」and in the「 Products section」of this website.

Under the spirit of "Customer Oriented", Fu Chun Shin (FCS) offers customized services to meet customers' demands. If our standard series machines cannot meet a customer’s requirement, we will modify our specifications or add extra functionalities to suit. For details please refer to our sales representative nearest your location, or E-mail: fcsco@fcs.com.tw.

In order to satisfy multiple needs of customers, Fu Chun Shin (FCS) has declared many new products. Please refer to the 「 Product」section of this website.

We can arrange plant tours to view the production of our machines. Please contact our sales representative. However, in order to protect trade confidentiality, we reserve the right in agreeing to any tour/visit arrangements.

Fu Chun Shin (FCS) welcomes your visit. For further details, please refer to 「 Contact Us」section of this website.

Our news releases are made by our Headquarters. For details, please check with our Spokesperson (E-mail: ying@fcs.com.tw).

Unit or Institution Website
Plastic Industry Technical Development Center
Machinery Industrial Research Lab, ITRI
Metal Industrial Research and Development Center
Precision Machinery Research and Development Center
Taiwan Area Machinery Industrial Association
Taiwan Area Mold and Die Association
Taiwan Area Plastic Manufacturing Industrial Association
Taiwan Trade Net
Precision Machinery Information Net
CAE Plastic Global Information Net
Global Plasticscommerce Network

FCS provides not only PET Preform Injection Molding Machine, but also PET high precision injection mold, including water bottle, 5-gallon large perform, hot filling bottle, and wide mouth bottle. For details, please refer to the 「 PET Series」in the「 Products」section of this website. In addition, for the PET preform molding system, FCS could provide a complete TurnKey Solution, including PET Preform

Product Info

Generally, customers in injection molding industries for years are equipped to judge and select by themselves suitable injection molding machines that fits them. But under certain circumstances, customers may need the assistance of the manufacturer to decide which specifications will meet their needs. Sometimes, they may ask if the machines of the manufacturer could produce the products they have in mind, which they merely have a concept or sample, or they would ask which model is suitable. Also, some of the products may need special devices, such as accumulator, close loop, injection compression to match with the selected unit to manufacture their products efficiently. Hence, it is of vital importance in determining what type / model of machine will serve their needs best. The following are information for your reference in making a decision.

Generally, the main factors that affects the selection of injection molding machine include: molds, products, plastic material, molding requirement, etc. Therefore, before proceeding with the selection, the following information must be collected first:
1.Mold size (width, height, thickness), weight and special design.
2.Type and quantity of plastic materials to be used (single or multiple materials).
3.The outer dimensions of the products (length, width, height and thickness) and their weight.
4.Molding requirements, such as quality, manufacturing speed, etc.After obtaining the above information, follow the following steps to select a suitable injection molding machine:
1.Select the right model: Decide the type and series of machine base on the products and the plastic materials.
2.Accommodate: Based on the dimensions of mold, determine whether the distance between tie bar, mold thickness, min. mold dimension, and mold plate dimensions are suitable or not, to confirm that the machine can accommodate the mold.
3.Retrievable: Based on the mold and product, determine whether the Mold Opening Stroke and Ejecting Stroke allow the product to be retrieved.
4.Lockable: Determine the mold locking force based on the product and plastic material.
5.Sufficient Injection: Determine the volume of injection from the weight of products and number of mold caves, and select suitable screw diameter.
6.Good injection: Determine the “screw compression ratio” and “injection pressure” from the plastic materials.
7.Fast injection: Checking the injection rate and injection speed.

There are many criteria for categorization of injection molding machines, but it can generally be separated into the following types:
1.In driving manner: hydraulic, all electrical, hybrid type injection molding machine.
2.In opening and closing direction of mold clamping unit: horizontal, vertical. Most of the machines are horizontal type. Vertical type is suitable for small insertion products.
3.In material processed: thermoplastic material, thermosetting material (thermosetting), powder injection (metal, ceramic, alloy). Presently, most of the units are for thermoplastic materials.
4.In hydraulic loop: single loop, multiple loop (dual or triple) injection machines. Most of the units presently are single loop injection molding machines.
5.In hydraulic circuit control: open loop, close loop injection machines. Injection molding machines are generally of open loop type, but the close loop type is growing for machine stability.
6.In mold clamping structure: toggle type, hydraulic, hydra-mech (two-plate type). In these 3 types, each has its own advantages and shortcomings. Presently toggle type is prevailing.
7.In injection mechanism: single color (one set injection), multi-color (multi-component injection). Most of the existing units are single color units.

In single hydraulic circuit, injection molding machine motions is under one hydraulic force guidance, all mechanical motion acts in sequence. Generally, the motion sequence of injection molding is as the following:
1.Mold closing: close the male mold to the female direction to be locked status.
2.Carriage forward: move and fit the injection nozzle to the feeding port of mold.
3.Charging: through the rotation of screw, the granular material is fed into material pipe for heating to molten type.
4.Injection: inject material into mold cavity.
5.Pressure holding: keeping injection pressure to prevent material reverse flowing and shrinking of product.
6.Front suck: screw retreat a certain distance for further feeding.
7.Charging: through the rotation of screw, granular material is fed into material pipe for heating to molten type.
8.Back suck: after feeding, screw retreat a distance.
9.Cooling: Waiting for cooling and solidification of product.
10.Mold opening: separating female and male molds.
11.Ejecting: eject product from mold.
12.Again mold closing, injection, pressure holding, suck, and the cycle continues.
In the above process flow, pressure holding and front and back suck are not always exist, which depends on molding conditions. Hence the process flow of injection molding can be simplified as: mold closing, injection, feeding, cooling, mold opening, ejecting, mold closing and so on.

In general, an injection molding machine is a piece of high pressure, high speed, and partially high temperature machine. For the dangerous areas, please refer to the sketch below.
1.Charging area: Screw is rotating here, do not place iron bar or any foreign matter into this area.
2.Barrel cover area: This is material heating area, with extremely high temperature and has the possible of electric shock.
3.Nozzle area: Material is injected in high pressure in this area. There is the danger of splash.
4.Mold area: This is the high speed and high-pressure closing and opening area, very dangerous. Also, the material could be jetted off from the mold. Special care shall be given in this area.
5.Ejecting area: Need special care as powerful mechanical motion is occurring here.
6.Mold clamping mechanism: Need special care as high speed and powerful motion is occurring here.

1. Injection Unit
In addition to basic metal plate guard, there is injection safety cover at the nozzle area for preventing splash of material. Injection unit will not be able to act without the cover in position.
2. Clamping Unit
In addition to basic metal plate cover and front and rear safety door, there are mechanical, hydraulic and electrical safety devices. When the machine is in operation, all these safety device would be activated, if one of the safety door is opened, and the clamping unit will stop moving.
a) Mechanical device: Generally, there is a safety lever on the movable mold platen. At emergency (one of the safety doors being opened) with the mechanical blocking or grabbing, the clamping mechanism will be stopped forcefully.
b) Hydraulic device: To offer further protection, when one of the front and rear safety door is opened, the relief valve will exhaust pressure in the system, and the clamping element will become inactive.
c) Electrical device: To prevent the failure of relief valve, when one of the front and rear door is open, the 2 limit switches on the safety door will have no signal of door closing and open signal is available, then the clamping element will be inactive.
3. Emergency Stop Switch
A red “Emergency Stop” press button is installed to each of the front and rear operation cabinet. When one of them is pressed, electrical motor and pump will cease operation immediately (but the power is still on), the machine will not be able to operate. Before operation of the machine, validity of these two buttons must be tested. If any one is invalid, complete check must be done to be safe.

Item Toggle Type Hydraulic Hydra-Mech
Motion feature Has acceleration and deceleration features. With good motion characteristics. Slow in acceleration and deceleration response, poor motion characteristics. Complicate speed control device. Slow in acceleration and deceleration response, poor motion characteristics. Complicate speed control device.
Operation Simple Rather complicated Rather complicated
Economy Toggle is driven by clamping cylinder. Lowest operation cost. Use more oil. Higher energy consumption.Operation cost is higher. Less energy-saving. The action of closing/opening cylinder is separate from that of clamping. Clamping cylinder is offered in short clamping stroke, so hydraulic oil will be less used.
Mold opening / closing speed Fastest Relatively slow Slowest, as there is added compound motion.
Mold opening force Small Smallest Large
Prevalence Widely used Limited Limited
Mold clamping force Difficult to measure
Difficult to set
Less accurate
Allow for overload
Easy to measure
Easy for setting
More accurate
Overload not allowed
Easy to measure
OEasy for setting
OMore accurate
Overload not allowed
Mold platen deformation Baring point at outer side with larger deformation Bearing point at center with less deformation Bearing point at centerwith less deformation
Mold life Heavier effect on the life of mold Pressure applied directly at the center of mold allows longer mold life Pressure applied directly at the center of mold allows longer mold life
Clamping Stroke Limited by mechanism, mold clamping stroke is fixed The clamping stroke is related with mold thickness and has an inverse ration with mold thickness. No related with the thickness of mold, not limited by mechanism, it can design longer mold clamping stroke.
Mold thickness adjustment Must adjust to mold thickness and mold clamping force. The procedure is complicated and takes a longer time in automatic mold adjustment. No mold adjustment required, clamp mold directly. Adjustment to mold thickness required, but easy to set mold clamping force.
Tie Bar life Due to shearing force of toggle, the rigidity and parallel within two mold platens shall be watched. Even bearing of four tie bars tension force.Longer life. Even bearing of four tie bars tension force.Longer life
Clamping mechanism Complicate in construction, parallel and wear shall be considered. Large hydraulic cylinder diameter, long distance. Difficult in processing and inner leakage. With succinct design.
Service and maintenance Care shall be given to the lubrication and service of toggle connecting rod and the axis. Frequent lubrication is not required, but difficult to remove for repair when failed. Frequent lubrication is not required, but difficult to remove for repair when failed.
Mechanical appearance Poorer Better Better
Cleanness Applying toggle system with self-lubricant bushing, it is of less contamination. Without self-lubricant, it will have more contamination. Less contamination Less contamination

1. All Electric Injection Molding Machine is not very different from hydraulic injection molding machine in body mechanism, but in the uses of AC Servo Motor, Ball screw, Gear and Timing belt to substitute the original hydraulic element, such as hydraulic motor, directional valve, hydraulic board and cylinder). Since electric elements are used to drive the injection machine, it is therefore called “ All- Electric”, and because the hydraulic element is replaced, there is not problem in hydraulic oil leakage and pollution, so is the operation noise. There are savings in energy and electric power consumption is lower. It is of higher accuracy than ordinary hydraulic injection molding machine.

2. Despite the advantages in energy saving, highly clean, low noise, All Electric Type Injection Molding Machine has certain shorts needs be improved. The problems include: high cost of servo motor, the durability of ball screw, difficulty in developing large tonnage clamping force model, and in area with instable power supply, it is unable to use accumulator to create transient high pressure. Among them, cost is t he main reason that the all electric unable to totally replace hydraulic type.

1966, Battenfeld of Germany pioneered the electric mechanism injection molding machine with electric motor feeding injection molding machine. However, not until Fanuc, Japan, with its own electric servo control technical advantage, cooperate with Milacron and commercialize all electric injection molding machine in 1994 had this type machine commence to prevail. In the Dusseldorf Exhibition (K’ Show) 2001, European firms had also presented all electric injection molding machine.

In fact, since the introduction of commercialized electrical type injection molding machine, all electric type has been based in Japan and North America markets. Many European firms are not keen in the development, but following the endeavor of Japanese firms and the market situation, the European firms could not stay at sideline, they finally introduced their new generation all-electric injection molding machine, such as Battenfeld、NETSTAL、ENGEL、MIR、OIMA、NEGRI BOSSI. With the development of major players of Europe, USA and Japan, incorporating all electric unit into production line is a trend destined.

What worth to note is that in 2004, some of the European and American firms introduced hybrid injection molding machine, or electrical injection molding machine, then all electric. Examples are Husky of Canada, Arburg of Germany, Demag, Krauss-Maffei, Sandretto of Italy , even JSW, Sodick, Toshiba and Meiki of Japan are all introducing their hybrid or partial electrification of injection molding machine. Either all-electric or hybrid type, they are within the scope of electrification. Therefore, there is wide discussion over whether the development of injection molding machine will be fully electrified or partially (hybrid).

 The all electric injection molding machine adopts electrical components to drive the IMM, which avoids leakage of hydraulic oil, pollution from waste oil, operation noise, and achieves more power-saving. The Europe's Association for plastics and rubber machinery manufacturers (EUROMAP) announced the guidelines of “Euromap 60” for addressing the crucial matter of energy efficiency.All electric IMM possess advantages of precision, stability, cleanliness and power-saving that is widely applicable for injection market.

 PR Newswire indicates the global automotive plastics continually growing which is expected to achieve 19.68 billion US dollars and compound annual growth rate up to 2.9% by 2023, the main demand sharp grow from automotive components, packaging, medical appliance and consumer goods. Moreover, FCS All Electric IMM is capable to connect iMF4.0 to help attain the concept of unmanned smart factory.

"Hybrid Injection Molding Machine", as the name tells, is combining hydraulic and electrical mechanism into injection molding machine. It has the precise positioning and energy saving feature of all electric, and on the other hand, it maintains t he high push of hydraulic mechanism. In other words, the hybrid unit, with lower cost than all electric, is able to improve the energy consuming and less precise problems of conventional hydraulic units, and it can greatly reduce contamination and noise. In fact, reading from statistics, 45% of European/ American/ Japanese manufacturers are providing hybrid units, and about 20% of them are offering both all electric and hybrid units. This means, in future, there will be more and more manufacturers incorporate all-electric and hybrid units into their production line, and this will offer high flexibility for molding operators in selection of types and models.

Between the 2001 K’ show European and American participants, though 7 of them have all electric, but still 9 are providing hybrid units. It seems that they prefer partial electrification than all electrification, particularly incorporating electric servo motor driving design into feeding system is popular in the injection molding machine manufacturers of Germany and Italy. The German Plastic Magazine-- Kunststoffe Plast Europe—reported in their Dec. 2000 issue that DELPHI has forecast the global injection machine market will be shared by 3 types, 34% hydraulic, 28% all electric and 38% hybrid, with hybrid takes the lead, which worth to think over. As reported there, all electric units do have advantages in small clamping force models, but the advantages are not fit to all plastic products. The energy saving and low contamination characteristics are more suitable for products need high cleanness, such as medical and food containers, and the high electricity rate area. The high performance hydraulic and hybrid units will still have their market stands.

In view of this, Fu Chun Shin, in addition to improve the original hydraulic injection molding machine and introduce brand new HT Series, has gone further in 2004 to develop AF Series high speed hybrid injection unit and CT Series all electric in 2017. It is one of few manufacturers who can offer hydraulic, all electric and hybrid injection molding machines. Customers can select the most suitable units from our product lines based on their need and investment costs.

Normally an injection molding machine has 6 important moving axis, which are injection, feeding, carriage forward and back, mold closing and opening, mold adjustment and ejection (core and unscrew). Majority of hybrid units maintain carriage forward / back, ejection, core and unscrew in hydraulic driven mechanism, and change the injection, feeding, mold closing/ opening and mold adjustment to be electrical driving mechanism. But if high speed injection function is required, it basically needs to remain injection element at hydraulic mechanism and adds accumulator and close circuit control to have transient high speed injection. We can see that which parts shall be maintain at hydraulic driven will mostly depend on the requirements from products, key molding function and the building cost of the machine. The purpose is to find an optimum balance among machine performance, quality and cost t o spend.

Injection compression molding can increase the molding accuracy, saving energy and reduce production cost, and the purpose is to reduce the injection and holding pressure at molding, and to reduce the distortion of product and internal residual stress. Injection
compression can upgrade the product quality and evenly promote the product density,
allowing easier molding of thin and large pieces.

In injection compression molding, there are Rolinx 、injection compression and partial compression. 

Injection compression molding has certain requirement on accuracy of metering, mold platen parallel, compression speed, compression starting time and compression force. 

In the control of compression stroke, toggle type clamping unit uses mostly movable mold platen detection to control compression stroke, and the detection can be done through checking the location of cross-head to determine the location of movable mold platen. Hydraulic cylinder piston stroke and movable mold platen stroke ratio can be as high as 35:1, meaning 1mm shift of movable mold platen will have 35 mm shifting of Cross-Hd mold platen. In this way as accurate compression stroke control is attained.

Bi-injection is generally refer to the molding of two color or two type of resin. Since in Bi-injection, there are two independent injection elements and nozzles, the color of product is normally clear-cut in color, without mixing together. On the other hand, the interval Injection uses compound nozzle to join the resin from two sets of injection element and match with the injection speed, pressure and time changes to cause the color to mix, to fade from one to other or to generate prints on product. As to Sandwich injection, it uses compound nozzle to join the two type of resin, but there shall have special design that one of the material is sandwiching the other to form core material and skin material. So, unless t he product is cut sectional, it is normally unable to see the core material but the skin material.

Bi-injection unit is different from general injection molding machine mainly in the injection element and movable mold plate design. Generally, Bi-injection has two independent injection elements, but only one with general injection unit. The deployment of two injection element has various type different from designs of one to another manufacture, such as horizontal parallel, horizontal Y uni-direction, horizontal L type, Vertical L and vertical Y, even in horizontal parallel contra-direction arrangement for two plats clamping structure. As to movable mold plate design, it has to have rotating mechanism. Frequently seen designs include rotary table or rotary axis mechanism to provide 180 deg. Reciprocal rotating function to allow cycling alternate motion. Still other special Bi-injection units do not need rotary table or rotary axis mechanism, but for the mold to provide the alternate or horizontal rotation.

Interval injection and sandwich injection are almost same general injection molding unit, and the only difference is the interval injection and sandwich injection unit both has two set injection elements injecting material into molds from common nozzle, and the difference between interval injection and sandwich injection is in the design of compound nozzle.

GAIM is injecting nitrogen into mold cavity during injection molding process and using the nitrogen to perform pressure holding , making hollow products to reduce weight and prevent retraction sinking, and cut down pressure required. It is also call Nitrogen Hallow Injection Molding or Lowe Pressure Hollow Injection Molding. But it is different from Blow Molding.

GAIM is basically including the following 4 steps:
1. Injecting fixed quantity of material into mold.
2. Injection nitrogen to hollowing product to reduce weight and assist the fluidity of material.
3. Nitrogen pressure holding: As the material is cooling and retracting, the nitrogen will undergo secondary penetration and prevent the product from sinking or spring-back.
4. Release of high pressure nitrogen: releasing nitrogen in the mold cavity.

1. For bulky / thick products
a. Saving material, reduce weight by 20~50%.
b. Shortening molding cycle(reducing cooling time)to 20%.
c. Reduction of mold cost.
d. Saving in post-processing.
2. For flat products
a. Increase in design varieties.
b. Appearance improvement and better electroplating effects.
c. Eliminating thick rib sinking of products.
d. Realizing low pressure molding and reducing clamping force.
e. Less residual stress in product and reduce the distortion and deformation.
f. Increase the structural rigidity of products.
g. Reduce number of parts.

It needs 98% purity nitrogen or higher, because nitrogen is easily available, low prices and will not react with the material. The oxygen in high air may mix and combust with molten resin, so the later is rather not suitable.

It needs 98% purity nitrogen or higher, because nitrogen is easily available, low prices and will not react with the material. The oxygen in high air may mix and combust with molten resin, so the later is rather not suitable.

The following equipment are required to apply GAIM techniques.
1. Injection molding machine.
2. Gas Assisted Injection equipment.
3. Nitrogen Generator or Nitrogen Cylinder.
4. Air Compressor.
5. Necessary molding peripherals.

Techniques involved with GAIM include mold design, product design, gas pin location
design and analysis, gas assisting device techniques, injection molding techniques, solution for defective molded product and mold flow analysis.

Not necessary, GAIM system of Fu Chun Shin can match with other brands of injection molding machine.

In addition to providing GAIM equipment, we also provide training on GAIM techniques, mold flow CAE analysis, product structure design, practice instruction and turn-key technical services packaged with injection molding machine.

1. 5 stagers gas pressure and velocity control (suitable for any GAIM mold.)
2. Single unit dual independent loops, expandable to 4 loops.
3. Close loop pressure control.
4. Max. output gas pressure 340 bar.
5. Controller adapts touch-screen.
6. Dynamic graphic molding pressure curve monitoring.
7.50 set mold title management and memory function.
8.Low pressure air 2 stage high efficiency pressure boosting
9.0.1% proportion valve accuracy、pressure sensing accuracy 1% 、pressure gauge accuracy 3%.
10. Compact size, light weight, easily movable.

They are identical in appearance and the difference is that GA-25 is a GAIM system containing booster, and GA-25C is a GAIM controller without booster. It depends on equipment in customer’s plant to select. GA-25 is suitable for whole plant low pressure piping, while GA-25C is suitable for whole plant high pressure piping.

Home appliance: TV、Air-Conditioner、Refrigerator、Dehumidifier.
Vehicle: Arms、Steering wheel、dashboard、pedal、bumper、window/door frame、mirror frame.
Computer: computer monitor shell、computer monitor bottom、NB shell、communication product.
Office equipment: chair arm、chair back、chair leg、desk leg、handle、table- top.
House ware: clothe rack、knife handle、racket、showerhead、faucet、bath tub handle、 computerized toilet basin seat.

1. Entering from nozzle:
a.  Can readily use with modification to existing mold
b.  Runner is in hollow shape, reduce the quantity of resin
c.  Product free of needle trace
a. All air path must be connected
b. Air paths must be symmetric and balanced
c. Cannot be used in hot runner system
d. Nozzle of machine must be replaced at high cost.
2. Entering through mold:
a. Can enter through multi-point, and the air paths need not be totally connected
b. Gas and resin can be injected in at same time
c. Hot runner design mold permitted
d. Can be used in asymmetric mold cavity molding
a. Need to develop and design new mold
b. Leaving needle trace on the product

In actual application, there are lots of examples that applying GAIM
techniques improved the surface sink mark and distortion caused by
existing mold; however, the design concept is totally different from the
conventional injection molding, it takes redesign of air path to
improve the molding quality.

It can reduce the need for higher clamping force, but need to have enough large column inner distance and injection volume.

It can reduce the residual stress in product, and can prevent the retraction distortion.

Shortening molding time and reducing weight are the main reason for
heavy, thick piece adopting GAIM, but the length of molding cycle is
still subject to the cooling time of the thickest part of product after

CAIM can eliminate chamfering and coring mechanism and reduce material of mold ( with low
pressure molding) but will increase air needle, mold modification and mold testing cost.

GASCIM unit uses high pressure nitrogen generated from special gas device to precisely control gas pressure, flow, time to inject the gas into molten resin in sandwiched co-injection mold and complete gas assisted sandwich co-Injection molding. In other words, GASCIM is processing equipment combines gas-assisted Iijection molding and sandwich co-injection molding. The functions included are the benefits of both parents, and the application can expand to thin-wall 3C for increasing mold prosperity, reducing distortion and deformation, promote product yield, reduce cost and increase functions of product and quality. 

PET is polyethylene terephthalate, a saturated polyester co-polymerized with terephthalate and Ethylene Glycol. It is good in transparency, gloss and airtight, and it meets the Food Safety Standard, and it can be recycled for re-use. The glass transfer temperature (Tg) of PET is between 75~80℃, and injection molding temperature is between 270~310℃, the mold temperature is 130~150℃. Since PET is high in water absorption, humidity prevention is specially required in storage, and before processing, it has to be dehumidified and dried under 150~180℃ for 4 hours normally. And, in order to prevent the resin to re-absorb moisture, it shall be kept at temperature above 140℃.  When operation is stopped, to prevent the resin turning yellowish, the dehumidifier / dryer temperature needs be drop to 100℃, only maintaining the temperature but not humidity. At the injection molding, if the material temperature is too high, screw shearing force is too high or revolving too fast, it is likely to generate acetaldehyde and leading to caudation. Normally, the molded PET bottle shall contain less than 3ppm of acetaldehyde.

In general, PET preform molding methods are in two types: direct blowing molding and extended blowing molding.
1. Direct blowing molding: This is to inject molten PET bottle on same machine (normally referred to as Injection Stretch Blow Molding, then in the hollow mold blow and stretch to molded product. Since the PET bottle is molded and stretch blown on same unit, so it is also called one step method, and before the bottle cooling off, the bottle is blown with the remaining heat, so it is also called Hot Bottle Blank method.
2. Stretch blowing molding: In this method, injection machine is employed to produce the bottle, then the cooled bottle is heated on stretch blown unit, and stretch and blow in hollow bottle to mold. Since this method is processing on injection and stretch blow machine, it is also called 2-Step method. Also, this method heats cooled bottle to blow and stretch, it is also called Cold bottle method. The process flow is as the following: dehumidify and dry PET materialinjection machine melt material and inject into moldcool PET bottle to molddual axis stretch blow molding by Stretch Blow Molding. Note: The dual-axis stretch is stretch longitudinally with stretching rod and high- pressure air for laterally extension.
3. The application: Generally, one-step method is better suitable for small volume production for large number of specifications. 2-step method is suitable for mass production of limited type. Our FT-P series—PET preform injection molding special unit is of 2-step method.

1. PET perform injection molding machine.
2. Dehumidifiers
3. Hopper Dryer
4. Auto Loaders
5. Mold Temperature Controllers
6. Chiller
7. Robot
8. Conveyor

PET material has been widely used in the packing container for the following products: water bottle, juice bottle, edible oil bottle, cosmetics bottle, drug bottle, bear bottle, wide neck bottle, detergent bottle.

1.Hydraulic Oil: Check if the hydraulic oil is between min. and max. line of oil gauge? If the
toggle auto filler oil at proper level?
2. Cooling water: Check if the cooling water pipe is free of leakage and if water level sufficient
to have normal cooling effect.
3. Start heating element and check: Ensure the electric heater of dryer, barrel and mold are at normal condition, especially the temperature must reach the set temperature before working injection, retreat and screwing motions.
4. Check the safety door and safety rod: Ensure the opening and closing of safety doors are normal, and the contact between safety door and each limit switch and the pressure relief valve are normal. Ensure the safety rod is proper position and firmly locked. Ensure the red press buttons on the operation box are working normally, so as to ensure the safety of operator.
5. Lubricating device check: Check if the grease oil level is sufficient and the filler time setting is proper and the filing device piping are unimpeded?
6. Moving mechanism check: All moving mechanism shall have proper lubrication, and the debris and dust on the moving parts shall be cleaned and maintain the friction surface clean and smooth. No tool shall be placed on moving parts, so to avoid breaking while machine                 is in operation.
7. Low pressure mold closing device check: Correctly adjust low pressure mold closing device to ensure the safety of mold.
8. Check other conditions: Ensure all settings, such as temperature, pressure, speed, timing and distance are correct.
9. Load free check: Work full-auto operation at lower pressure and let it run load-free for 10 to
30 min. and commence normal operation after a steady working condition is reached.
10. Noise check: Record the sounds at normal operation and the sound of hydraulic pump, it will allow operator to detect abnormality like blocking of filter, air-intake, internal wear. The buzz sound of solenoid is related to the debris in the internal axis. The buzz sound of      relay and magnetic contact indicate dirt and dust existence at the contact. Check the cause of the noise will be helpful in preventing damage.

1. Shut the gate of material hopper and reduce or close the heating device of hopper (depends on
the length of time of the stop.
2. Shoot out all the resin in the material pipe, particularly acid and corrosive materials must be    totally cleaned up.
3. Wipe mold to clean and apply anti-rust treatment. (depend on the length of time stopping operation)
4. When machine stopped, if the mold is not removed, do not extend toggle straight.
5. Close cooling water and switch off power.
6.Clean machine.

Weekly regular check
1. Heater check—Check for any broken wire or ill contact.  (For CE model, check the reading of amp meter).
2. Leakage check—Check the fittings of cylinder, oil pipe and solenoid for leakage.
3. Screw and nut check—Check the bolts, screws and nuts of the whole machine for any loss or loose.
4. Nozzle heater band check—remove any and all material attached to the lead wire and nozzle heater band.
5. Remove deposited waste oil on the machine.
6. Filtering mesh cleaning- within the first month, clean it every week, thereafter on monthly basis. Clean the whole machine.
Monthly regular check
1. Perform stricter check as per the weekly items and in determined manner.
2. Grounded wire check: grounded wire shall be checked strictly to ensure the user would not suffer electric shock.
3. Electric wire check: Electrical parts are likely to loose off due to vibration, burnt due to increase in current. So the terminal screws must be fasten firmly, and the dust, foreign matters and oxidation on the contact must be removed.
4. Movable mold platen and hydraulic motor seat skate check: check if the skate worn out, screw loose and moving parts are lubricated.
5. Cleaning and check of cooler: if underground, industrial water or salt water is used, remove the cooler to clean on monthly basis to improve and extend the efficiency and service life of cooler. If ordinary tap water is used, it may be cleaned in six-month interval (Basically, soft water is preferred, and add soften agent and scaling agent.)
Six-Month regular check
1. Repeat the monthly items in stricter and firmer attitude.
2. Hydraulic oil regular check: ask the oil supplier to make regular check of hydraulic oil to ensure the quality of hydraulic oil.
3. Check for any abnormal wearing of the moving part of machine.
Annual regular check
1. Repeat the half-year items in stricter and firmer attitude.
2. Electric motor check: Clean the intake port of cooling portion of electric motor with steel brush or air blower, because any dirt or dust exists, it will cause the motor to heat up and result to other heat damage directly.
3. Ventilation system check: Ventilation window installed on closed machine is for ventilation, so the oil stain and dirt attached shall be cleaned to prevent damage due to heating or cause oil temperature to rise.
4. Insulation check: The insulation of wire cover is downgrading gradually, so it is necessary to perform insulation measure to avoid accidental electric leakage and identifying earlier will permit prevention.

Generally, plastics can be split into 2 categories, thermoplastic and thermosetting. Under ambient

temperature, thermoplastic is in granular type and when heated to certain temperature, it will become

molten and when cool down, it will be solidified to a form. If heat again, it will become molten again for

next plastering. Hence, thermoplastics can be molded through heating to molten and repeated

solidification. So there is so called secondary material. On the other hand, thermosetting plastic is

solidified when heated to a certain temperature, and even heat up again, the status will not change again.

So, thermosetting plastics cannot be heated to repeat the molding. Therefore, thermosetting waste

material is normally unable to recycle. The categorization is shown as the following figure.

Abbreviation :UP(Unsaturated Polyester)、EP(Epoxy Resin)、PF(Phenol Resin)、MF(Melamine Resin)、UF(Urea Resin)SI(Silicone Resin)、PI(Polyimide)、PU(Polyurethane)、PABM(Polyamidebismaleimide)、BT(Bismaleimide-  triazine)、DAP(Polyarylphthalate)

The following are the characteristics of frequently used plastic materials, list down for reference.

Engineering plastic is industrial plastic made to be industrial parts or shell. Their strength, impact resistance, 

heat resistance, hardness and aging resistance are all good. In Japan, the industries define them 

as “high performance plastics used as mechanical parts with heat resistance at 100℃ or higher 

and mainly for industrial use”. Their property include:

1. Thermal Property: High glass transfer temperature (Tg) and melting point (Tm), high temp.

Deformation, high long-term use temperature (UL-746B), large use temperature range, low heat expansion coefficient.

2. Mechanical property: high strength, high mechanical mode, low creep, abrasion resisting, fatigue resisting.

3. Others: Good chemical resistance, good electric resistance, combustion resistance, weather resistance and dimensional stability.

Those being used as universal plastics include Polycarbonate, PC, Nylon, Polyamide, PA, Polyacetal, Polyoxy Methylene, POM, M-Poly Phenylene Oxide, M-PPE, PETP, PBTP, Polyphenylene Sulfide, PPS, and in thermosetting plastics there are saturated polyester, phenolic plastic and epoxy. They have stretch strength all exceeding 50Mpa and tensile strength over 500kg/cm2, impact resistance exceeding 50J/m, bending elasticity at 24000kg/cm2, load flexible temperature over 100℃. Good hardness and aging property. When PP has the hardness and cold resistance improved, it can be categorized into engineering plastics. Also included are fluorous plastics, which are low strength, good heat resistance and medicine resistance, silicone molten compound of good heat resistance, polyetherimide, polyimid, Polybismaleimide、Polysufone(PSF)、PES、PP Plastic, M-Millitic Amine Plastic, BT Resin、PEEK, PEI, crystalline plastic. Due to difference in chemical structure, medicine resistance, friction characteristics and electric characteristic are different. Due also to the molding property, part of them are suitable for all kinds of molding, and some of them fit only to certain types, which restricted their applicability. Thermosetting engineering plastics are with poor impact resistance, so the normally are added with fiberglass. Other than PC, which has high impact resistance, they normally have low elongation, hard and brittle, but if they are added with 20 – 30 % fiberglass, they can be improved.

Plastic is a aggregate of slim, linear polymer compound. The regularity of molecular array is

called crystalline, the degree of crystallization, which can be measured with X ray. Organic compound has more complicate construction, and the bonds are various (linear, curl, folding, spiral, etc) and this leads to great change in construction due to molding conditions. Plastics with high crystallization are Crystalline Plastics, and the interaction is high between molecular and become tough plastic. To be crystallized and correct regular array, the volume becomes smaller and the shrinkage and heat expansion rates become larger. Hence, the higher the crystalline is, the poorer the transparency and the higher the strength.


Crystalline Plastics has apparent melting point (Tm), at solid state, it is arrayed regularly, the strength is higher and the tensile is better. When melted, there is higher specific volume change and easy to shrink after solidification. The inner stress is less easy to release. The molded product is non-transparent. The heat dissipation during molding is slow. Production with cold mold has large shrinkage rate, but smaller in hot mold production. In contrast, there is Non-Crystalline Plastics. It does not have apparent melting point, and the molecular is not regularly arranged in its solid state. When melted, there is small change in specific volume, and not likely to shrink when solidified. The product has good transparency. The higher the material temperature, the yellowish the gloss is. Heat dissipation is fast during molding. The following is comparison of property of the two different kinds. 

The full name of MI is Melt Flow Index, or Melt Index, a value indicating the fluidity of plastic at working. It is established by ASTM adopting the method normally employed by Du Pont is testing characteristics of plastics. The testing method is the weight in gram of plastic material flowing through a round tube of 2.1mm within 10 minutes under certain temperature and pressure (they are different for different type of plastic materials). The higher the value the better the working fluidity of the specific plastic material, or it is poorer. The most frequent test standard is ASTM D 1238. The measuring instrument of this standard is Melt Indexer, with construction of one trough for plastic material; a tube of 2.095mm dia. and 8mm long is fitted to the end of the trough. When heated to a certain temperature, a piston at the top apply certain weight and press down to measure the weight of the material being squeezed out in 10 minutes, which is the MI. Sometimes, it is indicated as 25g / 10min, clearly indicate its MI is 25, and is 25g being squeezed out in 10 min. The MI values of frequent used plastics are ranged between 1 and 25. The higher MI the lower the viscosity and mole weight, and the smaller MI is, the plastic has higher viscosity and large mole weight.

Glass transition temperature, Tg, is a kind of Transition temperature. AT Tg, polymer will demonstrate rubber 

state at higher temperature to hard and brittle glass-like state at lower temperature. Crystalline plastics have 

apparent Tg and latent heat. A polymer in rubber or glass state is depends on Tg and the temperature in use, 

so Tg is an important indicator in the use of polymer. The following are Tg of some of plastic materials.

Heat deflection temperature, HDT, means , under pressure, the highest temperature the plastics maintain

profile unchanged. Generally, this is indicated by Short Term Heat Resistance of plastics. When safety

factor is taken into consideration, the highest temperature at use shall be 10 less than HDT. The most

frequent used measure is ASTM D648 apply temperature rise of 2/min at the center of a standard of

127×13×3mm, under 455kPa 1820kPa charge, till the deformation rate is 0.25mm. For non-crystalline

plastics, HDT is 10~20℃ Tg; to crystalline plastics, HDT is close to Tm. Normally, when fiber reinforcement is added, the HDT will rise, because the fiber can greatly increase the mechanical strength of plastics, so the HDT will rise drastically during temperature rise flexibility test.

Shrinkage rate means the deviation in dimensions of the molded , cooled and solidified products from 

the dimension of original molds measured in percentage, this can be measured per ASTM D955. 

The shrinkage rate shall be considered firstly at the design of mold, so to avoid the product discrepancy due to 

dimensional discrepancy.

The molding conditions of some plastic materials are listed in the following tables:

Injection mold can be split into hot runner mold and cold runner mold. The former is also called as “ No

Runner Mold” which insert heater into sprue or runner to keep the molten resin at this portion to coagulate

but flowing. After each injection, the material in runner will remain there and taken out on the product,

which means during the resin is the mold cavity, the resin in the runner remain molten, and when open mold, only the product is taken out. The later type of mold, the resin in the runner cools down together with the resin in the mold cavity, and takes out together. It is further split into Cold Runner 2-platen mold and Cold runner 3-platen mold.

In cold runner 2-platen mold, the product and the gate are taken out together, except submersible gate, the product and runner is connected. In cold runner 3-platen mold, after opening the mold, the product and the gate are taken out together also, but mostly with point gate. The difference between them is that the runner is set to the other plane of mold splitting surface in case of cold runner 3-platen mold, which means that except Core and Cavity, there is another a runner releasing plate. The mold is basically consisted of these 3 mold platens, and the fixed mold plate and runner releasing plate are sliding along the long guide key on the installation plate of the fixed portion

When injection molding, the resin in sprue and in runner are maintained in molten state by special method,

and when the product is released from mold, the runner still maintain in the mold. This is so-called hot

runner injection molding. The benefit and short are listed in the following table.

When taking product out of female mold, the mold has to be break into two halves, the parting line, PL is where 

theyare separate, it is also called division surface or mold split line. Base on this line, the fixed portion is called 

fixed mold, or female, and the movable part is called moving mold or male. When the PL is decided, the 

profile of female cavity and male cavity can be determined. And determine it needs side concentric type. 

It can be used to understand the difficulty of mold design. When selecting PL, the following shall be attended:

1. Select less prominent location or shape to avoid affecting the appearance of molded product.

2. At the mold opening, it is not recommended to have dead corner, to avoid increasing mold   


3. Should be at the location easy for through working, easy to process or easy to finish product.

4. The gate shape and location shall be taken into consideration.

    The function of runner system is to guide molten resin injecting from the nozzle of injection molding machine into mold cavity . This system consists of sprue, main runner, branch runner, gate. The design and preparation of runner system have substantial effects on quality, precision, appearance and molding cycle. Sprue is the filling port of molten resin. In order to detach from the mold, it is normally design with 2°~4°chamfer. Main runner and branch runner is the path for the molten resin to flow into mold cavity, and here the fluidity and heat loss shall receive special consideration. Gate is the entrance of molten resin enters mold cavity. The design of gate has great effect on the molding and inner stress of product. Detailed runner system is shown in the following figure.

     Cold slug well is also called “ Material Stay”. The purpose is to prevent flow mark on the next molding product left by molten resin. Generally, the nozzle tip of injection ma chine has small molten material left, which will be solidified before next injection. If it enters molded product, it will leave flow mark. To prevent it, the solidified material at the front of injection material is kept in cold slug well, to prevent hurting the appearance of product. Cold slug well is normally located at the junction of sprue and main runner, as show in above figure. So, the cold slug well is to keep the colder material at the front tip of injection nozzle of last molding, and allow the molten material with even temperature injected into mold cavity. This helps to even the density and quality of products.

     Gate has substantial effect on the molding feature and internal stress. Normally suitable type is

 selected per the shape of product molded. They may be split into Restricted Gate and Non-Restricted Gate. The former has narrow entrance between runner and mold cavity. It is easy for processing and to cut off the molded products from runner. It helps to reduce residual stress. It is easy to balance multiple cavities gates in multi-product in on shot. This type is generally adopted when he molten resin in mold cavity is not likely to reverse.  Under this category, there are Side Gate, Overlap Gate, Tab Gate, Fan Gate, Film Gate, Ring Gate, Disk Gate, Point Gate and Submarine Gate. The later is gate for molten material injected directly into cavity from sprue. This is the representative of non-restricted gate. The type, location, size, number of gate has direct effect on the molded products in appearance, deformation, retraction and strength. Therefore, in design, the following shall be taken in consideration:


1. Shape of Gate:

Shape of gate affects the molten resin fluidity inside cavity, the appearance of molded product, and the material flow direction. It is therefore necessary to select type of gate base on type of material or shape of molded products and the effect on flow direction.

2. Location and number of gates:

(1)  The location of gate shall allow molten material to run throughout all part of the mold,

   and it is better to be in the center or the thick part of molded products.

(2)  The hole on molded product will have key on the mold. Do not let the injected material

 bend or shift those keys.

(3)  When at two or more locations, they shall not allow the welding line or air bubble damage

appearance of product and reduce the strength.

(4)  Residual stress tends to concentrate adjacent to gate, which could become bristle and

crack. So it is recommended not to select the location sustaining force.

(5)  Selection the location where it is not prominent on the product surface, easier to process.

3.Type of Gate (Shape):

In its function, gates may be separated into Restricted Gate and Non-Restricted Gate. The former is build a narrow part at the joint between main/branch runner and the mold to hold the flow of material; the later has sprue for material to flow directly into the entrance of female mold. Ordinarily restricted gate is more selected. The features, shorts and benefits are listed in the following table.

Runner is also called horizontal runner and is the channel for molding material from Sprue to female mold. Runner normally needs be solidified before taking out, so the runner is cut into two halves at the diameter line for processing then match up. Base on the fluidity, section shape of runner, there are round, U, Trapezoid, rectangular and square shape. Round and semisphere and trapezoid are the better ones. But in the fluidity and heat dissipation, round runner is the best. The next are rectangular, trapezoid and square. Semi-sphere is rather less used except in special circumstances. The benefits and shorts are as the following.