Two-color injection molding is a part that is realized by injection molding of two kinds of plastics. Two-color injection molding in a broad sense includes over molding, which is achieved by ordinary injection molding machines and two injection moldings. In a narrow sense, two-color injection molding refers to the use of two-color injection molding machines to inject two different plastics on the same machine to complete parts. So what are the characteristics of the two-color injection molding process? The following is the sharing of the editor of Keshimei:

1. Differences in machine structure between two-color injection molding components and ordinary injection molding components

Due to the unique characteristics of the plastic products produced by the two-color injection molding components, there are some obvious differences in the mechanism setting of the machine and the ordinary injection molding machine.

First of all, the melt temperature used in the two-color injection molding components is relatively high, which is different from ordinary injection molding components, and high temperature is required to maintain the ability to operate and flow in the mold; secondly, the injection pressure is also relatively large, not only because of the use of It is two different plastic raw materials. To press and weld them, it needs to be fused with strong pressure, and it is designed to overcome the huge resistance of the molten material flowing in the mold, so as to ensure the smooth progress of injection molding.

2. Two sets of structures of the two-color injection machine

Due to the influence of the purpose of making the product, the two-color injection molding machine needs to be equipped with two identical plasticizing and injection devices. This is not only the requirement of its process, but also the ability to perform rotational transformation.

In addition to the same structure, these two sets of injection devices with the same specifications also need to have the same functions. During injection molding, the raw material temperature, injection pressure and injection rate in the two sets of equipment can be adjusted consistently, so that the injection molding plastic products The indicators are kept at a consistent level, and then the relevant fusion and welding work is carried out. If the parameters of the two sets of equipment are inconsistent, try to adjust them to the same level.

3. Two-color injection molding technology material parameter setting

Two-color injection molding technology uses two different materials for the production of plastic products, so it is necessary to consider the materials before injection molding, not only the quality standards of the selected materials but also the temperature, pressure and other parameters of the materials during injection molding control.

The characteristics of the two-color injection molding process are shared here. Since the molds used in the two-color injection molding technology are different from those used in ordinary injection molding, it is required that the materials used in the two-color injection molding technology have higher melt temperature. , to ensure that the molten material will not be solidified in advance before the injection molding is completed, and at the same time, the injection device should be used to control the pressure of the raw material so that it can reach all parts of the mold smoothly, so as to achieve the purpose of injection molding.

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