Do you know the 2K mold design Characteristics？

 The characteristics of the two-color mold:

1. The two shapes of the front molds are different, forming 1 product respectively. And the two shapes of the back mold are exactly the same. (Note: If there is any difference, make a front mold slider to ensure that the rear mold is consistent)

2. After the front mold of the mold is rotated 180º from the center, it must match the rear mold. This must be taken into account when designing.

3. When designing, please carefully check the parameter data of the two-color injection molding machine, such as the maximum mold thickness, minimum mold thickness, distance from the ejector pin hole, etc.

4. The nozzle of the three-plate mold should be designed to be able to automatically remove the mold. Pay special attention to whether the demoulding action of the soft glue nozzle is reliable.

5. When designing the cavity for the second injection, in order to prevent the cavity from inserting (or scratching) the glue position of the product that has been formed for the first time, you can design a part of the void. However, the strength of each sealing position must be carefully considered, that is, during injection molding, is there a possibility that the plastic will deform under high injection pressure, resulting in the possibility of a batch front in the second injection molding?

6. During injection molding, the product size of the first injection molding can be slightly larger, so that it can be pressed more tightly with another cavity during the second molding, so as to achieve the effect of sealing.

7. Pay attention to whether the flow of plastic will impel the product that has been formed for the first time during the second injection molding, causing its glue position to be deformed? If this is possible, we must find a way to improve it.

8. The water transportation arrangement of the two cavities and the core should be as sufficient as possible, and balanced and the same.

9. In 99% of the cases, the hard rubber part of the product is injected first, and then the soft rubber part of the product is injected. Because the soft rubber is easy to deform.

10. In order to make the two plastics "stick" tighter, the "stickiness" between the materials and the roughness of the mold surface should be considered.

Two-color injection molding has a special TPU; and the smoother the surface of the mold, the tighter they "stick".

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