There are two different plastics in the products made b […]
There are two different plastics in the products made by two-color molds and overmolded molds. However, there are many differences in their plastic mold technology, mold difficulty, and product price.
The two-color mold is a relatively advanced injection mold, which is produced by a specific two-color injection molding machine. There are two nozzles on the injection molding machine that can directly inject two different plastics. Now there are extended products on the market, such as three-color machines. Its two-color plastic injection molding is on the same plastic mold. When injection molding, it is produced by rotating the back mold of the plastic mold. In this way, the upper and lower molds of the plastic mold are avoided, and the product can be directly molded, ensuring the uniformity and accuracy of the product position, and the qualified rate of the product is very high.
The overmolding mold is an extension of the ordinary injection mold. The mold of a product often needs to be opened in two. It is necessary to put the product injected from the first plastic mold into another mold, and then inject the product at the same time. Because it is two different injection molding processes. Therefore, products often have a large scrap rate.
In terms of the production time of the product, the two-color mold can realize automatic production, and the output of the product is relatively high. The overmold is a product that needs to be injected manually for the first time, and the production efficiency is low. In terms of product quality, two-color molds are often the market for mid-to-high-end products, while overmold molds are mostly mid-to-low-end products, and the usage of products is relatively low. For the cost of plastics, two-color molds are often several times the cost of overmolding. It is also because of the low cost of overmold molds that overmold molds are often preferred when large plastic molds and low-yield products are used.