Comprehensive Guide to Injection Mold Manufacturing

Injection molds are important tools for plastic injection production. They are usually designed and manufactured from steel, aluminum alloy and other materials. Plastic products manufactured through injection molds feature low cost, good quality, and precise and consistent dimensions.

The structure of the injection mold is complex, and the processing difficulty and manufacturing cost are very high. Manufacturing high-quality injection molds requires comprehensive consideration of design, material selection, processing technology and maintenance. The following is a detailed introduction to injection mold manufacturing by Universe Plastics Engineers:

Injection mold manufacturing design

1. Product design evaluation

Evaluate the design and manufacturability of the product and whether it is suitable for the injection molding process.

2. Mold structure design

Structural design: draft angle, number of cavities, gates and runners, etc.

System design: pouring system, cooling system, exhaust system, ejection system, etc.

3. Injection molding simulation

Use computer injection molding simulation tools to conduct comprehensive functional tests on the mold, identify problems and make corrections.

Injection mold material selection

1. Mold steel

Choose high-quality mold steel, such as P20, 718, S136, etc., and choose materials with suitable wear resistance, corrosion resistance and hardness according to product requirements.

2. Mold accessories

Choose high-quality standard mold accessories, such as guide posts, guide bushes, springs, etc., to ensure mold accuracy and life.

Mold processing technology

1. Rough machining

Preliminary sawing and milling of the mold steel is performed to obtain the rough shape.

2. Finishing

Use CNC and EDM for precision machining, including milling, drilling and tapping, to ensure the dimensional accuracy of each component of the mold and obtain high-precision and smooth surfaces.

3. Heat treatment

The mold steel is quenched and tempered to improve its hardness and wear resistance.

4. Surface treatment

Polish the cavity and core to ensure the surface finish of the finished product. Surface etching is performed as needed to increase the surface texture and decorative effect of the product.