Double injection molding is mainly used to produce two-color products by two material tubes of double color molding machine and two sets of molds.
Compared with traditional injection molding, dual material co injection molding process has the following advantages:
1. The core material can use low viscosity material to reduce the injection pressure.
2. In consideration of environmental protection, the recycled secondary materials can be used as the core materials.
3. According to different use characteristics, for example, soft material is used for thick finished leather material, hard material is used for core material or foamed plastic can be used for core material to reduce weight.
4. Lower quality core materials can be used to reduce costs.
5. Coating material or core material can be used with high price and special surface properties, such as anti electromagnetic interference, high conductivity and other materials to increase product performance.
6. The proper combination of the core material and the cortex material can reduce the residual stress of the products, increase the mechanical strength or the surface properties of the products.
7. Products that produce lines like marble.
From the characteristics and application of multi-color injection molding and dual material co injection molding, it can be seen that there is a trend to gradually replace the traditional injection molding process in the future. The innovative injection molding technology not only improves the precision of the injection molding process, provides the high difficulty process technology, but also opens up the scope of the injection molding process field. The innovative injection equipment and process are enough to meet the more diverse, high-quality and high value-added product demand.
Two color injection molding has been widely used in electronic products, electric tools, medical products, home appliances, toys and almost all plastic fields. The production and molding of two color mold, the research and development of two color multi-color injection molding machine and two color injection raw materials have also made rapid development.
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