What is affecting mold polishability?

platen rubber compression press

Rubber silicone mold solution:

1) The surface condition of the workpiece

During the machining process of materials, the surface layer will be damaged due to heat, internal stress or other factors, and improper cutting parameters will affect the polishing effect. The surface after EDM is more difficult to grind than the surface after machining or heat treatment, so EDM finishing should be used before the end of EDM, otherwise, the surface will form a hardened thin layer. If the EDM specification is not properly selected, the depth of the heat-affected layer can reach up to 0.4mm. The hardened thin layer is harder than the substrate and must be removed. Therefore, it is best to add a rough grinding process to provide a good basis for polishing.

(2) Quality of steel
High-quality steel is a prerequisite for good polishing quality, and various inclusions and pores in steel will affect the polishing effect. In order to achieve a good polishing effect, the workpiece must indicate the surface roughness of the polishing at the beginning of machining. When a workpiece is determined to be mirror polished, steel with good polishing performance must be selected and all of them have undergone heat treatment, otherwise, it will not meet expectations. Effect.

(3) Heat treatment process

If the heat treatment is not proper, the steel surface has uneven hardness or differences in properties, which will cause difficulties in polishing.

(4) Polishing technology

Since polishing is mainly done manually, human skills are still the main reason affecting the quality of polishing.
It is generally believed that the polishing technology affects the surface roughness. In fact, good polishing technology needs to cooperate with high-quality steel and correct heat treatment process to obtain a satisfactory polishing effect; on the contrary, if the polishing technology is not good, no matter how good the steel is, the mirror effect cannot be achieved. .




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