Two-color mold: Two kinds of plastic materials are injected on the same injection molding machine, which is divided into two moldings, but the product is only used for one-time molding. In general, this molding process is also referred to as two-shot molding and is usually completed by a set of molds and requires a special two-color injection molding machine. Two-color molds are increasingly popular on the market. This process can make the appearance of products more beautiful, easy to change the color and can not spray, but the cost is expensive and technical requirements are high.
1. The two shapes of the master mold are different, and one type of product is formed respectively, and the two shapes of the male mold are exactly the same.
2. Before and after the mould is rotated 180o in the center, it must match. This inspection must be done during the design process.
3. The total thickness of the front mold panel plus the A plate must not be less than 170mm. Please check the other reference data for this type of injection molding machine, for example, the maximum mold thickness, the minimum mold thickness, KO hole distance, etc.
4. The nozzle of the three-plate die can be designed to be able to automatically release the mold. Special attention should be paid to whether the soft glue outlet is capable of being ejected*.
5. When designing the second injection molding master mold, in order to prevent the secondary mother mold from inserting (or rubbing) and hurting the gel part of the product that has been molded for the first time, part of the design can be avoided. However, the strength of each seal must be carefully considered. That is, whether or not there will be plastic deformation under large injection pressure in the injection molding, which may result in a possible second batch injection.
6. When injection molding, the size of the first injection molded product can be slightly larger so that it can be pressed tightly with another male mold in the second molding to achieve the function of the sealant.
7.At the second injection molding, does the flow of plastic impulsion to the product that has been molded for the first time to deform the gel position? If this is possible, it must be improved.
8. Before clamping the A and B plates, pay attention to whether the front mold slider or the inclined top will be reset and crush the product. In this way, it is necessary to find a way to make the A and B plates mold first, and then the slider or the top of the front mold can be reset.
9. The water transfer arrangement of the two mother models and the male model is as full as possible, balanced and the same.
In 10.99% of cases, the hard plastic portion of the injection molded product was first injected, and the soft plastic portion of the injection molded product was re-injected. Because soft plastic deformation.
