Technology Knowledge

What is the double-color injection molding process?

A double-color injection molding is a molding process in which two plastic materials are injected into the same injection molding machine and molded twice, but the product only comes out of the mold once.

Double-color injection molding process is also called two-color injection molding, 2-shots injection molding, is usually done by a set of molds and requires a special double-color injection machine.

Double-color injection molding is a process in which two different materials are injected into the same set of molds so that the molded parts are formed by two materials. Some of the two materials are different colors, some are different soft and hard, thus improving the aesthetics of the product and assembly and other properties.

double-color molds are becoming more and more popular in the market because this double-color injection molding process can make the appearance of the product more beautiful, and easy to change the color without painting, but the cost is expensive and the technical requirements are high.

Neway has brought in double-color and triple-color injection molding technology and machines in the year of 2019.

What are the advantages of double-color injection molding?


Compared with traditional injection molding, the double-color injection molding process has the following advantages:

  1. The core material can use low viscosity material to reduce the injection pressure.
  2. For environmental reasons, the core material can be used as recycled secondary material.
  3. According to the different characteristics of use, such as the use of soft material for thick finished skin material, hard material for core material, or core material can be used to reduce the weight of foam plastic.
  4. Can use lower quality core material to reduce costs.
  5. Skin or core material can be used with expensive and special surface properties, such as anti-electromagnetic interference, high electrical conductivity, and other materials to increase product performance.
  6. Appropriate skin material and core material can reduce the residual stress of molded products, and increase the mechanical strength or product surface properties.
  7. Produce products such as marble patterns.


Development of double-color injection molding


From the characteristics and applications of multi-color injection molding and double-color injection molding, it can be seen that there is a trend to gradually replace the traditional injection molding process in the future.

The innovative double-color injection molding technology not only improves the precision of the injection molding process but also provides a high level of process technology and opens up the scope of the injection molding process. Innovative double-color injection molding equipment and processes are needed to meet the increasing demand for diverse, high-quality, and high-value-added products.

Double-color injection molding has been widely used in almost all plastic fields such as electronic products, power tools, medical products, home appliances, toys, etc. The production and molding of double-color molds, as well as the development of double-color multi-color injection molding machines and double-color injection molding materials, have also developed rapidly.


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