Three suggestions for mold injection molding

In the process of two-color mold injection molding, in addition to molding problems, there are other things to pay attention to. Now we have summarized three suggestions for mold injection molding.

1. The choice of raw materials: two-color molds usually use the same plastic with different colors, or two different plastic raw materials. At this time, the interface effect of the two materials, the difference in shrinkage, and the processing parameters should be considered. . Generally speaking, the shrinkage rate of the two-color mold depends on the primary material. Because the primary material has already supported the contour of the plastic injection molded product, the secondary material will not shrink more.

2. Gate location selection: For two-color molds, the gate location must be carefully selected. It is best to choose latent glue feeding for a product, so that the product and the runner can be automatically cut off. When latent glue feeding cannot be used, three-plate molds or hot runner molds can be considered. If the primary material is a point gate, it is necessary to make a wave to avoid touching the secondary material due to the residual point of the primary feed.

3. Choice of two-color molds: Rotary injection molds are often used for mold injection molding. The convex or concave molds at the two positions of the rotary injection mold must have the same size and accuracy, and they must be well matched with the concave or convex mold.