Hitech Popular Science: Classification of Injection Molds
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作者:Ethan Zhang
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发布时间 :2026-08-19
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Injection molds are classified by molding process, molding material, production output and mold steel. Hitech explains the characteristics and application scenarios of different injection molds.
Introduction
Molds are the core tooling for injection molding production. Different product materials, production scales and molding processes require matched mold solutions. In the injection molding industry, molds are mainly divided into four major classification dimensions: by molding process, by molding material, by production output, and by mold material.
1. Classification by Molding Process: Hot Working Mold & Cold Working Mold
Classified according to the working temperature during product molding.
Hot Working Mold: Suitable for high-temperature molding conditions. Typical applications include bakelite and BMC thermoset injection molds. The mold requires continuous heating during operation to trigger the curing reaction of thermoset materials and complete product forming.
Cold Working Mold: Forms products through cooling and solidification. Ordinary thermoplastic injection molds belong to this category. The molten material solidifies inside the cavity via cooling circulation, and the mold does not need high-temperature heating.
2. Classification by Molding Material: Metal Mold & Non-Metal Mold
Classified based on the raw material of the molded products.
Metal Mold: Designed for metal forming, including die-casting molds and stamping molds, widely used in metal component processing.
Non-Metal Mold: Used for processing non-metal workpieces such as plastics, thermoset materials and rubber. Conventional plastic injection molds, bakelite molds and amino plastic molds all fall into the non-metal mold category.
3. Classification by Production Output: Prototype (Simple) Mold & Mass Production Mold
Selected according to customers’ actual production volume and project demands.
Prototype (Simple) Mold: Focuses on rapid sampling and small-batch trial production. It features short development cycle and low cost, but has limited mold service life. It is mainly used for product function verification, prototype testing and small-batch orders.
Mass Production Mold: Customized for large-scale continuous manufacturing. Adopting high-grade mold steel with high structural strength and excellent wear resistance, this type of mold delivers long service life and stable mass production performance. All Hitech bakelite and BMC mass production products adopt professional mass-production molds.
4. Classification by Mold Material: Soft Mold & Hard Mold
Classified by the hardness grade of mold steel after heat treatment.
Soft Mold: Made of pre-hardened steel without quenching treatment. It has a short processing cycle and high cost performance, suitable for medium and small-batch injection production.
Hard Mold: Manufactured with quenched and tempered steel, featuring high surface hardness, strong wear resistance and longer service life. For high-temperature and high-abrasion thermoset materials such as bakelite, hard molds are mandatory to reduce mold loss and ensure stable production.
About Us
Hitech (HK) International Limited specializes in the development of thermoset bakelite molds, BMC molds and thermoplastic plastic molds. We provide customized mold solutions based on material characteristics, production volume and project budget to meet diverse customer processing requirements.
