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How is the two-color mold injection molded?

Update:15-04-2022
Summary:

Now there are pet molds, chair moulds, thin wall molds, […]

Now there are pet molds, chair moulds, thin wall molds, bucket moulds, etc., but you don't find them. Their appearance and color are more beautiful than before. The two colors are packaged together, very beautiful, and feel very good, this is two-color Mold injection.
In fact, two plastic materials are injected on the same injection molding machine, and the injection molding is performed in two times, but the product is only released once, and the first injection molding is the semi-product of the product. In the injection molding of color A, the quality of the product is directly related to the overmolding problem of color B. If the product A is not well-made, then color B will have flash during injection molding, which will affect the appearance of the product. Therefore, the B color product must ensure the mold precision.
1. Color mixing two-color mold, that is, the two nozzles of the injection molding machine alternately inject materials of different colors into the same mold cavity to form a pattern product without obvious boundaries.
2. Double-layer two-color mold, that is, two kinds of two nozzles inject two materials successively into two-color products with obvious boundaries that constitute the product. The first nozzle injects the material into a small cavity and then molds, and then the mold is opened but not topped. After the mold is rotated 180 degrees, the mold is closed, and then the second nozzle injects another material into the large cavity that already has the first material, so that the two materials stick together and then eject the mold for the second time.