Two-Color-two-shot-multi-material-Injection-Molding-Machine-Manufacturer-Supplier-China

Two color injection blow molding machine is one of Guanxin`s most popular plastic injection molding machines. This multi-material two-shot injection molding machine is a horizontal injection molding equipment to produce kinds of two-color products like toothbrushes, tooling kits, household plastic goods, medical instruments, vertical brake lights, keyboards, water-resistance parts, etc. These plastic double-shot injection molding machines are developed to achieve fully automated mass production with high quality, high output capacity, and lower manufacturing costs. With less investment and significant economic benefits, it is the trend of mainstream technology in the future. These kinds of multi-material products produced by 2k injection molding process system have made a qualitative leap in terms of appearance and performance, production efficiency, and high quality. Our customers are satisfied with our two-component injection molding machine. It come with hight ROI because saving lots of time and energy comparing products produced by insert moulding or overmold moulding.

As one of top two color injection blow molding machine manufacturers in China, Guanxin Plastic Machinery has more than 10 years of experience in multi-shot injection molding machine optimization design. You can trust us as our machines is offered with 3 years quality guarantee.

Guanxin Machinery_Professional injection molding machine and injection blowing moulding machine manufacturer in China_1024

What is Two Shot Injection Molding Machine

double color injection molding machine_ 2k injection molding processing

Two Shot Injection Molding Machine is developed to kill the high cost of insert molding or over-molding. Two shot injection molding is also called two color injection molding, double color injection molding, bi injection molding, bi-color injection molding, two color moulding, two component injection molding and 2K injection molding. Two shot injection molding refers inject two kinds of the same material or two different materials (Mostly PP+PP,PC+PC,PP+TPE) through an two shot injection molding machine (two-color injection molding machine) and the two color injection mold by twice injection unit, and the final product has two colors or two materials.

There are two independent screw & barrel sets at the injection unit on only one moulding machine; These two injection units could do injection action at a different times or simultaneously. According to the request of plastic molding products, two color injection moulding machine with flexibility could do ejection then tum the rotary table or turn the rotary table first then do the ejection action as well.

This multi-materials series injection molding machine is suitable for producing lots of value-added products like keyboards, and handlebars. and hanger, etc. For more, please refer to the Double Color Injection Molding Machine Apllications.

How It Works Two Shot Injection Molding Machine

Two Color Injection Molding Machine Working Principle

The Two-Color Injection Molding Machine injects the first material into the mold and the plastic takes the shape. After the mold is open, the movable rotary mould platen turns 180 degrees with the semi-finished product. Then the machine makes the second injection after the injection nozzles are directed at the cavities of the mold and the mold is closed. For the Multi-material series, the two steps is done at the same time( It`s more fast and more effective ).

  • This series machines is equipped with rotary mold platen, which is suitable for producing double color products.
  • Rotary table is located by mechanism, which is precise and stable.
  • External mold hydraulic and water cooling systems are easy to operate and maintain.
  • Two independent controls for the shot platforms, injection simultaneously is achieved to shorten the molding time.
  • Rotary table or rotary shaft is optional to produce many kinds of colorful products.
How it works Multi color injection molding machine_clamping unit structure of double color injection moulding machine

Two color Injection Molding Mahcine rotary mold clamping platen design

Rotary Mold Platen Design and Working Principle

The two component injection molding machine have a rotary table, which mount on the second platen or called moveable platen. A rotary axis is located at the center of moveable platen, which could drive two color injection mold move around to produce individual two-component products.

The double shot injection molding machine`s rotary table is mostly driven by hydraulic motor with gears. And located by a position sensor to feedback the signal to the 2k injection molding machine`s servo motor. This rotay injection modling technogy is the traditional method. Now many double shot injection molding machine manufacturers start to use the servo motor to drive the rotary table directly. With the full servo driven technogy, it can have more fast response time and can shorten the production cycle time as the table can turn around synchronously when mold open.


Two Color Injection Molding Machine`s Features

Two-color injection molding machine is featured with colorful and attractive appearance plastic products. Meanwhile, it is composed of two injection components, which can inject material not only synchronously but also alternately by two separated screws & barrels which are controlled by a professional programmable computer. This kind of two shot injection molding used for manufacturing multi-layer products while with low production cost.

 

  • Ramp-row five support point double crank web structure, mold board designed by the computer parameters optimizing design.
  • Mechanism, electronic and hydraulic triple interlock safety protection function.
  • Multiple hydraulic liftout type.
  • Multiple stages control for mold opening and clamping pressure, speed, position control.
  • Hydraulic motor-driving gear mold adjustment.
  • Special technique treatment, reliable strength.
  • Automatic centralized lubrication system.
  • Mold open and clamping,liftout position control.
  • Automatic mould adjustment function.

Two-Color Injection Molding Machine`s Features_Double color injection moulding machine manufacturer & supplier in China

Two Shot / Two Color Injection Molding Advantages

Two shot injection moulding can integrate multiple functions into one plastic part, such as soft-sensitive surfaces, ergonomic design, two-color appearance, brand identity, feature improvement, noise reduction, shock absorption, water resistance and impact protection, saving design space and reducing the number of components, etc.

Two Shot _Two Colour Injection Molding Advantages_Why to choose double color injection molding machine from Chinese manufacturer

  • Increased product design flexibility
  • Improved plastic molding parts integrity
  • High efficiency for multi-material
  • Higher-quality plastic part fabrication
  • Reduced handling and no secondary assembly
  • Reduces cost and waste associated with assembly defects
  • Different plastics are integrated with chemical links
  • High value added and have more benefit for products
  • Manufacturing trends in the future, the earlier the better

 

Double Color Injection Molding Machine Applications

1. Applications to power switches, car switches, keysboards, etc. to meet the requirements of partial light guidance or light transmission.

Two Color Injection Molding Power Switches_multi color injection molding machine manufacturer in China
Double color injection Moulding Car Lamp Covers
Double shot Injection Molding Keybards_two color injection moulding Gaming Keyboard
Double Shot PBT Pudding Keycaps_Double Shot plastic injectin molding machine supplier in China

2. Application to hand-held products like toothbrush handles, walkie-talkie bodys, power tool handles, spanners and thermoses to improve feelings.

Multi Material Injection Moulding electric drill handle_Multi Material Injection Molding Machine Manfactrurer in Guangdong
Multi-Component Injection Moulding Screw Drivers_Multi-Component Injection Moulding Machine Manufacturing in China
2K injeciton moulding Toothbrush with Tongue Cleaner_ 2K injeciton molding machine supplier in Guangdong China
Double shot walkie-talkie bodys_Two-Component Injection Molding Machine Manufacturer in China

3. Products that require a multicoloured attractive appearance but safe withou rubbing off during long time used,
such as kids toys, keyboards, two-colour injection moulding will be the first choice with high value added but low manufacturing cost.

two-colour injection moulding value added toys_2 color injection molding machine factory in China
bicolor injection moulding keycaps_bicolor plastic injection machine manufacturer in China
mix color injection molding kids toys_3k injection molding machine factory in Chian
Multi material injection moulding value added kids toy_Multi material injection moulding machine factory in China

4. Two shot injection molding is widely used for products that require partial plating, such as the keys of feature phones, high-end model toys,etc.

ABS and polysulfone (PSU) are the only platable plastic in whole plastic family. So ABS will be the only choice if a single side of the product or a partial area requires color plating.
And the other part of the product no need to be plated could be other plastic materials like PC.

In the plastics family, only ABS and polysulfone (PSU) surfaces can be plated. If a partial area or a single side of the product requires plating,
the plated area should be injected with ABS and the area that does not require plating should be injected with other materials such as PC.
( Click for Compatible Plastic Materials for Two Shot Injectin Moulding )

multi-material injection molding nickel plating car model parts_plastic injection molding machine factory in China
two color injeciton molding and nickel plating accord car plate holder_two color injeciton molding factory in China
Two Shot Injectin Moulding car plate holder with nickel plating_Two Shot Injectin Moulding factory in China
two shot injection moulding parts with nickel plating

5. Applied to products that need to be waterproof to achieve the requirement of water resistance.

Two shot injection moulding waterproof electric box_double color plastic injection molding machine factory in China
Double color injection moulding waterproof electric box_multi color injection molding machine quotation
Two color injection moulding waterproof electric box_bicolor plastic injection machine
Bi-material injection molding Waterproof Plastic Enclosure Box_dual color injection molding machine

Parameters of Two Color Injection Molding Machine

Specifications UNIT GX160-MM GX200-MM GX250-MM GX400-MM
International Size 1600-325 2000-770 2500-770 4000-1230
CLAMPING UNIT
Clamping force KN 1600 2000 2500 4000
Opening stroke mm 400 490 460 600
Max.daylight mm 850 1060 1090 1250
Platen size mm 990×850 1252×900 1250×1150 1300×995
Bars distance mm 700×420 910×510 910×570 1020×630
Diameter of rotational mold adapter mm Φ730 Φ896 Φ1000 Φ1120
Max. rotational mold diameter mm Φ850 Φ1074 Φ1118 Φ1329
Max.mold thinkness mm 450 600 510 650
Min.mold thinkness mm 150 150 200 300
Ejector stroke mm 110 150 110 140
Ejector force KN 2×34 2×65 2×34 2×65
Molds positing center`s distance mm 420 500 490 500
INJECTION UNIT A/B A/B A/B A/B
Screw diameter mm 28/28 36/42 36/42 52/36
Screw L/D ratio 20/20 20/20 20/20 20/20 19.9/20
Injection pressure Mpa 221/221 185/190 185/222 180/185
Shot volume cm3 74/74 163/249 163/249 520/163
Shot weight (PS) g 62/62 153/234 153/234 462/153
Injection rate g/s 62/62 78/95 78/95 153/78
Screw stroke mm 120/120 160/180 160/180 245/160
Screw speed r.p.m. 206/206 187/164 187/164 170/187
POWER UNIT
Hydraulic system pressure Mpa 17.5 16.0 17.5 17.5
Pump motor power KW 11+7.5 11+11 11+11 22+11
Heater Power KW 3.5/3.5 6.0/7.5 6.0/7.5 11.5/6.0
GENERAL
Oil tank capacity L 260 490 410 630
Machine weight Ton 6.8 8.0 9.5 15.0
Machine dimension M 4.6×1.5×1.7 5.2×1.7×1.9 5.6×1.8×2.0 7.0×2.0x2.3
* Some configurations may subject to be updated without any notice as machines optimized need.

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    Two Color Injection Molding Knowledge Center

    What kind of Plastic Materials Can Be Used For Two Shot Injectin Moulding?

    As all we know, different plastics materials have different chemical properties. Not all materials are able to bond and stick together. The plastic compatibility will directly affect the bonding strength and bonding effect of two shot injection moulding/double shot injection moulding. So it`s very important to choose the right plastic material when designing two color injeciton moulding / multi-component injection moulding products. The materials used during the multi-shot injection moulding process should form a chemical bond among them and stick together.

    1. Below tables shows the bonding abilities of different plastic materials.

    1). Hard Plastics to Hard Plastic bonding abilities table:
    Adhesive properties of multicomponent injection molded thermoplastic materials

    Plastics ABS ASA CA PA 6 PA 6.6 PA-Blend PBTP PC PC/ABS PC/PBT PC/PET PC PETP PMMA POM PP PPO PS SAN TPE/TPU
    ABS Excellent Good Good Good Good / Good Good Good Good Good Limited Good Good Unable / Unable / Limited Limited
    ASA Good Excellent Good / Good / Good Good Good Good Good Unable Good Good Unable Unable Unable Unable Good Limite
    CA Good Good Excellent / / / Excellent / / / / Unable / / Unable Unable Unable / / /
    PA 6 Good / / Excellent Excellent Good Good Limited Good Good Good Limited / / Unable Limited Unable Unable / Limited
    PA6.6 Good Good / Excellent Excellent Good Limited / Good Good Good Limited / / Unable Limited Unable Unable / Limited
    PA-Blend / / / Good Good Excellent / / / / / / / / Limited Limited Unable / / Limited
    POM Limited Unable Unable Unable Unable Limited Limited Limited Limited Limited Limited Unable / / Excellent / / / / Limited
    PP / Unable Unable Limited Limited Limited Limited Unable Unable Unable Unable Good / Unable / Excellent Limited / / /
    PPO Unable Unable Unable Unable Unable Unable / / / / / / / Unable / Limited Excellent / / Limited
    PS Unable Unable / Unable Unable / Limited Unable Unable Unable Unable / / Unable / / Good Excellent / Limited
    SAN Limited Good Good / / / Good Good Limited Limited Limited Limited / Good / / Unable Limited Excellent Good
    TPE/TPU Limited Limited / Limited Limited Limited Limited Limited Limited Limited Limited Good Limited Limited Limited Excellent Limited Limited Good Excellent

    2). Hard Plastics to Soft Plastic bonding abilities table:

    Plastics TPE-polyamide-bases TPE-polyester-elastomers TPE-polyolefin-bases TPE-styrene-bases TPE-thermo-plastic polyurethanes TPE-adhesion-modified grades
    ABS Unable Limited Unable Unable Good Excellent
    ASA / Good / / Good /
    CA / / / / / Good
    PA6 Excellent / Unable Unable Good Excellent
    PA6.6 Excellent / / Unable Good Excellent
    PA-Blend Excellent / Limited Limited / Excellent
    PBTP Unable Limited / Good Unable Excellent
    PC Unable Limited Unable Limited Good Excellent
    PC/ABS Unable Limited Unable Limited Good Excellent
    PC/PBT Unable Limited Unable Limited Good Excellent
    PC-PET Unable Limited Unable Limited Good Excellent
    PE Unable / Limited Limited / Good
    PETP Unable / / / / Good
    PMMA / / / Limited Limited Good
    POM Unable / / / Good Good
    PP Unable Unable / Good / Excellent
    PPO Unable / / / / Good
    PS Unable Unable Unable / / Excellent
    SAN Unable / / / Good Excellent
    * TPE=Thermoplastic elastomer.

    2. The multi-shot injection molding materials` melting temperature should be between 30-60° difference. Bellow table shows you the most common plastics melting temperatures your further checking & study:

    Plastics Min. Melting Temperaturer (C/F) Recommend Melting Temperaturer (C/F) Max. Melting Temperaturer (C/F)
    ABS 200 / 392 230 / 446 280 / 536
    PA 12 230 / 446 255 / 491 300 / 572
    PA 6 230 / 446 255 / 491 300 / 572
    PA 66 260 / 500 280 / 536 320 / 608
    PBT 220 / 428 250 / 482 280 / 536
    PC 260 / 500 305 / 581 340 / 644
    PC/ABS 230 / 466 265 / 509 300 / 572
    PC/PBT 250 / 482 265 / 509 280 / 536
    HDPE 180 / 356 220 / 428 280 / 536
    LDPE 180 / 356 220 / 428 280 / 536
    PEI 340 / 644 400 / 752 440 / 842
    PET 265 / 509 270 / 518 290 / 554
    PETG 220 / 428 255 / 491 290 / 554
    PMMA 240 / 464 250 / 482 280 / 536
    POM 180 / 356 210 / 410 235 / 455
    PP 200 / 392 230 / 446 280 / 536
    PPE / PPO 240 / 464 280 / 536 326 / 608
    PS 180 / 356 230 / 446 280 / 536
    PVC 160 / 320 190 / 374 220 / 428
    * Data Collected by Mr Martin Chen from Guanxin Plastic Machinery Co., Ltd.

    3. The coefficient of thermal expansion CTE of the base material and the covering material are as similar as possible.

    4. The shrinkage rates of the base material and the covering material are as similar as possible.

    5. Avoid the combination of amorphous and semi-crystalline plastics.

    6. The HDT of the base material should be higher.

     

    What Are Types of Multi-component Injection Molding Methods?

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    Two-color Injection Mold`s Characteristic & Why It Cost High?

    What is 2-Shot Overmolding and Multi-shot Injection Molding

    What is Double Injection Molding (2 material 2 shot molding)?

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      Two Color Injection Molding Machine Manufacturer & Supplier in China June 17, 2022