Two-color Mold: That is to say, two plastic materials need to be injected on the same Injection Molding machine, and they are injected twice, but the product is ejected at one time, also known as double-material injection molding, a two-color injection molding machine completed by a set of molds. The products produced by the two-color injection molding machine have a beautiful appearance and do not need spraying. The disadvantages are high cost and high technical requirements.
1. The products produced by the female mold are different, while the shape of the male mold is exactly the same.
2. When the front and rear molds of the mold are rotated about 180 degrees, the molds need to be matched. The design must do this inspection, which has high requirements for the mold base positioning process.
3. Other reference data of the injection molding machine need to be carefully checked, such as mold thickness, KO hole distance and other data.
4. In order to avoid the product glue position formed in the first time by the friction of the secondary master mold, some vacancies can be designed when designing the master mold for the second injection. However, we need to carefully consider the strength of each sealing part, namely In the injection molding process, will plastic deformation occur under large injection pressure, which leads to the possibility of batch production in the second time.
5. During the Injection Process, the product size of the first injection molding needs to be larger, so that the male mold of the second injection molding can be pressed more tightly, so that it can be sealed.
6. During the second injection molding process, it should be noted that the deformation of the first molded product may be caused by the flow of plastic, resulting in the deformation of the glue position. So, if possible, find ways to improve it.
7. Before closing the A and B boards, it is necessary to pay attention to whether the front mold slider or the inclined top will reset first, or will it crush the product? In this way, we need to find a way to close the molds in the A and B plates before the slider or lifter of the front mold is reset.
