High temperature (as molded molten metal, cast ceramic clay, or some type of plastic).
Cool molds and molded products.
High pressure (most plastic injection molding).
Production (without damaging the mold).
Large-scale production of mold materials or used alone.
The number of holes at the same time to make as many products as possible.
Wall thickness of plastic parts.
Position of the parting line or parting line.
There must be no chamfering or dead ends.
Materials
The material of the mold directly affects the cooling effect. Common mold materials include P20 steel, H13 steel, P6 steel, S7 steel, beryllium copper alloy, aluminum, 420 stainless steel, and 414 stainless steel. Its selection principle is:
Good machinability (processing tools are not easy to wear)
Uniform material organization without defects (shorter die life or direct scrap)
Good mechanical properties, good strength, toughness, wear resistance
Good surface finish
Easy heat treatment, less deformation
Good weldability
Good heat resistance, low coefficient of thermal expansion (shorter mold life)
High fatigue strength