What are the Materials for Plastic Mold Cavity? Plastic mold cavity materials refer to the materials used to make the cavity part of the plastic mold. Different plastic molds use different cavity materials to meet different requirements and needs.

 

What are the Materials for Plastic Mold Cavity?

 

Plastic mold cavity materials refer to the materials used to make the cavity part of the plastic mold. Different plastic molds use different cavity materials to meet different requirements and needs.

 

The following are 5 common plastic mold cavity materials:

 

(1) Tool steel material: Tool steel is one of the commonly used plastic mold cavity materials. It has good hardness, wear resistance and corrosion resistance, and can withstand the injection molding process under high temperature and high pressure conditions. Common tool steels include P20 (known as 3Cr2Mo in China), 718 (known as 3Cr2NiMo in China), etc.

 

(2) Stainless steel material: Stainless steel is another commonly used plastic mold cavity material. Stainless steel has high corrosion resistance and oxidation resistance, and is suitable for processing plastic materials containing acidic or alkaline components. Common stainless steel materials include SUS420, SUS304, etc.

 

 

(3) Aluminum alloy material: Aluminum alloy is a lightweight material with good thermal conductivity, which is suitable for manufacturing large molds or molds with low weight requirements. Aluminum alloy has high thermal conductivity, which helps to speed up the cooling of plastics. Common aluminum alloy materials include ADC12, 6061, etc.

 

(4) Copper alloy materials: Copper alloys have good thermal conductivity and wear resistance, and are suitable for manufacturing molds under high temperature and high pressure conditions. Copper alloy materials can provide better heat dissipation and help control the cooling rate of plastics. Common copper alloy materials include H13, CuBe2, etc.

 

(5) Polymer materials: In addition to metal materials, some polymer materials can also be used to manufacture the cavity part of plastic molds. For example, polyimide (PI), polytetrafluoroethylene (PTFE), etc. have excellent high temperature resistance and corrosion resistance, and are suitable for processing high temperature plastics or special plastic materials.

 

It is necessary to select the appropriate plastic mold cavity material according to the specific application requirements and the characteristics of the plastic material. Different materials have different characteristics and application ranges. For different injection molding products and production requirements, selecting the appropriate cavity material is an important factor in ensuring mold performance and life.