The Rise of Double Color Mold Technology
Ⅰ.Advantages of Two-Color Molding
1.Two-color molding may also be referred to as 2-shot molding, bi-injection molding, co-injection molding, or multi-shot injection molding, which produces a part with two different colors and/or materials in a single operation.2
2.two-color mold is able to combine two resins with different characteristics and colors into a single two-color product, which reduces the assembly and post-processing of molded products, saves the cost of melting and printing, increases the aesthetic effect, and enhances the grade and added value of the final product, not only anti-skid with increased friction, but also the flexible resin material allows it be more ergonomic with a better feel.
3.two-color injection molded product features a high quality stability, making it easy to control product deformation, reduce the molding cycle, and increase the output, with a scrap rate 7% lower than that of overmolding, and a product manufacturing cost 20%-30% lower than the latter.
Ⅱ.Production Process Characteristics of
Two-color Injection Molded Products
1. A two-color injection molding machine is composed of two sets of plastic injection devices with exactly the same structure and specs. The nozzle needs to have a special structure according to the production method, or be equipped with two sets of injection molds with the same structure that is able to be rotated and transposed. During plasticization, the process parameters such as melt temperature, injection pressure, and injection volume in the two sets of plasticizing devices are required to be the same, so the fluctuation of process parameters in the two sets of devices should be minimized.
2. Compared with the common plastic injection molded products, two-color injection molded ones possess higher parameter values for the melt temperature and injection pressure during the injection process, of which the main reason is that the runner in a two-color mold is longer, the structure is more complex, and the melt flow resistance is larger.
3. Two-color plastic injection molded products preferably select raw materials with great thermal stability and low melt viscosity, so as to avoid decomposition due to high melt temperature and long residence time in the runner. The most widely used plastics are PC, PS, ABS, etc.
4. During the injection molding process of two-color plastic products, to make the two melts of different colors well welded in the mold and ensure the quality of the molded products, a higher melt temperature, mold temperature, injection pressure and injection speed should be adopted.
Ⅲ.Applications of Double Color Mold Technology
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Automotive industry
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Consumer electronics
In the field of consumer electronics, two-color injection molding technology is used for mobile phone cases, keyboards, headphones and other products. By combining plastics of different colors or materials, the product is not only more attractive in appearance, but also has anti-slip, wear-resistant and other functions.
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Medical equipment
- Home appliance industry
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Expanding Applications
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Tchnological Advancementse
Dongguan Sanlixin Plastic Technology Co.,Ltd
Shenzhen Sanlixin Technology Co., Ltd. and Dongguan Sanlixin Plastic Technology Co., Ltd. is a manufacturer integrating precision plastic mold design, mold opening, single (double) color injection molding, IML injection molding processing, producing various single (double) color, IML process high-end appearance decorative structural parts, two-color buttons, USB dust plugs, panels and other plastic products, providing customers with fast, excellent, Midea all-round service, the company has 15 years of experience in precision plastic mold design, processing and production, with a variety of advanced machine injection molding equipment with excellent quality and fast service to win the trust and strong support of our customers.
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