A two-color mold is a mold in which two plastic materials are injection molded twice on the same injection molding machine, but the product is produced only once. Let me talk about what issues need to be paid attention to when designing two-color molds.
1. The two shapes of the front mold are different to form a product. The two shapes of the latter mold are exactly the same. (Note: If there are differences, the front slider should be used to ensure that the rear slider is consistent.)
2. The front mold of the mold must be rotated 180 times in the center and must be consistent with the back mold. This must be noted in the design.
3. When designing, please carefully check the parameters of the two-color injection molding machine, such as the maximum mold thickness, minimum mold thickness, and ejector hole spacing.
4. The nozzle design of the three-piece mold should be able to demold automatically. Special attention should be paid to the reliability of the ejection action of the soft nozzle.
5. When designing the cavity for the second injection, in order to avoid the cavity insertion (or abrasion) from hurting the glue position of the product that has been formed for the first time, a part of the cavity can be designed to avoid the cavity. However, the strength of each sealing position must be carefully considered, that is, in the injection molding, will the plastic be deformed under the large injection pressure, resulting in the possibility of a second batch of injection molding?