What is a two-color mold?
Two-color mold: Two plastic materials are injected on the same injection molding machine and molded in two times, but the product is only ejected once. Generally, this molding process is also called double-material injection molding, which is usually completed by a set of molds and requires a specialized two-color injection molding machine. Two-color molds are becoming increasingly popular in the market. This process can make the appearance of the product more beautiful, and it is easy to change colors without spraying. However, it is expensive and requires high technology.
1. The two shapes of the female mold are different and one product is molded respectively, while the two shapes of the male mold are exactly the same.
2. The front and rear molds of the mold must be aligned after rotating 180o from the center. This inspection action must be done during design. This point has higher requirements for the positioning and processing of the mold base.
3. The total thickness of the front mold panel plus A-board cannot be less than 170mm. Please carefully check other reference data of this type of injection molding machine, such as maximum mold thickness, minimum mold thickness, KO hole distance, etc.
4. The nozzle of the three-plate mold should be designed to automatically release the mold. Pay special attention to whether the demoulding action of the soft glue mouth is safe.
5. When designing the master mold for the second injection molding, in order to prevent the second master mold from inserting (or scratching) the glue position of the first molded product, a part of the cavity can be designed. However, the strength of each sealing position must be carefully considered, that is, during injection molding, whether the plastic will deform under high injection pressure, resulting in the possibility of sharp edges in the second injection molding.
6. When injection molding, the size of the first injection molded product can be slightly larger so that it can be pressed more tightly with the other male mold during the second molding to achieve the sealing effect.
7. Pay attention to whether the flow of plastic will affect the product that has been formed for the first time during the second injection molding, causing the glue position to deform? If this is possible, we must find ways to improve it.
8. Before closing the molds of plates A and B, pay attention to whether the front mold slider or inclined roof will reset first and crush the product. In this case, we must find a way to close the mold on plates A and B first, and then the slider or inclined top of the front mold can be reset.
9. The water transportation arrangement of the two female molds and the male mold should be as adequate as possible, balanced and the same.
In 10.99% of cases, the hard rubber part of the product is injected first, and then the soft rubber part of the product is injected. Because soft glue is easy to deform.
Xiamen Jinjiekun Industrial Co., Ltd. has the most advanced two-color mold production and processing technology, and undertakes the OEM of various injection molded parts at home and abroad. The company independently develops and produces sports equipment parts, plastic shells for electronic products, medical plastic products, etc. It is a leader in China's plastic production industry. leader. If you need business cooperation, please contact us.
