The choice of plastic molds is based on the life of mold, the properties of plastic, the function of internal parts, and mold cost. However, materials are usually selected to have the following properties.
Plastic mold is a tool for the production and molding of plastic products. The principle of plastic mold is to inject a hot, melted plastic material into the mold through an injection molding machine, where it is cooled to form a molded plastic product.
The biggest problem in the production of injection-molded products is the appearance of product burrs, mostly found on the parting surface of the mold.
In plastic mold processing, the quality of the mold determines production efficiency. When selecting mold materials, we should do the following: Abrasion resistance, Strength and toughness, Fatigue fracture property, High-temperature performance, Cold and hot fatigue resistance and Corrosion resistance.
The mold temperature depends on the crystallinity of the plastic, the size and structure of the product, the performance requirements, and other process conditions (melt temperature, injection speed, injection pressure, molding cycle, etc.).
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