Double color injection molding application scene and application analysis

What are its specific application scenarios, and how to analyze the application materials?

The application of double color injection molding

1) Used in night lights, mobile phone keyboards, car switches, etc., considering part of the requirements of light transmission.

2) It can be used on hand-held goods, such as pneumatic tool handles, insulated cups, etc., to increase tactile sensation;

3) Used in a variety of tonal appearance provisions of the commodity, such as computer keyboard, the application of two-color injection molding process, both good-looking and do not worry about being rubbed off in the application.

4) It can be applied to some products with specified electroplating process, such as function keys of feature phones.

In the plastic family, only ABS and polysulfone (PSU) surface can electroplating process, if the provisions of part of the commodity or one side needs electroplating process, it is necessary to inject the electroplating process area for ABS, the area without electroplating process injection for other materials such as PC.

3) It is applied to moisture-proof and waterproof products to ensure moisture-proof and waterproof functions, mobile phone shell, etc.

Plastic is not the same, its physical properties are not the same, its compatibility mode directly affects the compression strength and compatibility of two-color injection molding.

Therefore, in the development of two-color injection molding design products, to choose better substrate materials and cover materials.

1) Select base material and cover material with good compatibility mode. When selecting the actual material model and specification, contact plastic dealers to find technical support or suggestions.

2) the melting temperature difference between the base material and the covering material is not more than 30~60°.

3) The linear expansion coefficient CTE of the base material and the covering material should be as similar as possible.

4) Shrinkage rate of base material and covering material is similar as far as possible.

5) To prevent the combination of amorphous plastics and semi-crystalline plastics.

6) The HDT of the base material should be higher;