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plastic injection mold company in China


As a good reputation manufacturer in China. We here share the basic plastic injection mold makers process in our company:

Mold design

1. The product design department provides product information to the injection mold design department. injection mold designers complete cost analysis in two working days and provide it to the R&D manager.

2. R&D department release "Mold Making Apply" to the plastic injection mold design department after confirmed the project.

3. Injection mold designers organize relevant personnel to review the project base on the product information. Including product structure, mold structure, cooling system, runner, slag, venting, etc.

4. After evaluation, injection mold designers begin to design the plastic injection mold. Including 3D drawing correction, 3D parting, mold parts assembly drawing, EDM drawing, electrode drawing, etc. And organize relevant personnel to evaluate those drawings. Then issue to the plastic injection mold making department.

Purchase mold-basic-processing

1. The Injection mold company makers evaluate and study the drawings. And order mold materials if there is no objection, otherwise, communicate with the plastic injection mold designers.

2. Injection mold makers inspect the mold materials in time after the materials arrive at the factory. And arrange technicians to do locksmith works, include turning, grinding, milling, screw holes, water carrying holes, center holes, CNC roughing, etc. The technicians should pay attention to the precision of each right-angle side. Avoid empty of the center hole and each production base, roughing margin, etc. Then outsource each mold part to heat.

Heat processing

1. The plastic injection mold maker must detect its hardness and metallurgical analysis. Generally, the core hardness 46-50HRC, for uniform distribution of 9 points. Requiring its hardness differs is less than 1HRC. Metallurgical analysis should be done for the injection mold core before processing to make sure there is no segregation, scars, etc.

Electrode processing

1. There are fine and rough processing, a fine male spark is 0.08, a rough male spark is 0.2 (subject to the actual situation). Be sure to pay attention to each processing benchmark, and detect electrodes after processing is finished.

2. Before finishing, must make the right angle for the mold core. The vertical degree should less than 0.02 mm, finish degree 1.6.

3. For line cutting, please note that all parts' base, enlarge 0.02mm for the insert hole and center hole as tolerance clearance. For a non-standard thimble, the tolerance clearance is 0.04mm of the actual thimble size.

4. Mold core finishing shall base on the benchmarks after making right-angles. Typically leaving 0.02 mm to Die as a margin (without considering tool wearing).

5. EDM processing, the process according to the drawings' size, fine 0.08, rough 0.2 (subject to the actual situation). Pay attention to the benchmarks in processing, for sparks processing, the leave a margin of 0.03-0.05 mm.


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Target State: All States
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Last Update : Nov 12, 2025 12:15 AM
Number of Views: 3
Item  Owner  : injectionmoldchina
Contact Email:
Contact Phone: 021-52913487

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