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Difference between Injection Mold and Blow Mold

Difference between Injection Mold and Blow Mold

1. Injection mold

Injection molding is thermoplastic injection molding. This method is to melt the plastic material and then inject it into the film cavity. Once the melted plastic enters the mold, it will be cold-formed and processed into the desired shape. The shape of is often the final product appearance, no other processing is needed. In addition, the injection molding process can well control the details, such as protrusions, ribs, threads, etc., can be formed in one step in the injection molding process, and become the injection mold for plastic products we need.

2. Blow mould

Blow molding, also called hollow blow molding, is a rapidly developing plastic processing method. Its processing principle is as follows. Place the thermoplastic resin in a heated and softened state or the tubular plastic parison obtained by injection molding in the mold, and then inject compressed air after the mold is closed to inflate the plastic parison and adhere to the inner wall of the mold. , Then cooling and demolding, and finally get the desired hollow product.

3, The difference between injection mold and blow mold

Through the above introduction, I believe we have a certain understanding of these two processing techniques. In fact, the primary difference between an injection mold and a blow mold is the presentation form of the product. The products made by the injection molding process are generally thicker, relatively simple to manufacture, and require lower materials. The blow molding process is different. The manufactured products are thinner and transparent, and the slight shortcomings are easy to see. It is precisely because of this that the blow molding mold has higher processing requirements, and the resistance to materials, stretchability, etc. There are certain requirements.