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Mold Design

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Zhejiang Chenghui Mould Co., Ltd.

How to Make a Good Plastic Injection Mold

High quality injection molds determine the stability, yield, production efficiency, and long-term cost of products. At Chenghui Mold, we believe that good molds come from rigorous design, precision manufacturing, and long-term reliable service.
With 32 years of experience in manufacturing injection molds for daily necessities, we have established a complete service system from feasibility analysis, mold design, precision machining, mold testing and verification to after-sales support.

What is Excellent
Injection Mold Design?

The form and position of the sprue, parting line, cooling system, ejection method, runner design, and steel selection all directly affect the stability of molding, product appearance and dimensional accuracy, production efficiency and energy consumption, mold life and maintenance costs.
  • Zhejiang Chenghui Mould Co., Ltd.

    Feasibility Analysis of Plastic Parts Molding

    Before the design begins, we conduct a systematic inspection of the customer's product to assess whether the wall thickness is uniform, whether there is shrinkage, deformation, air streaks, short shot risks, and whether it is conducive to demolding and long-term stable production
  • Zhejiang Chenghui Mould Co., Ltd.

    Mold Structure Design & Analysis

    In the process of mold design, we comprehensively consider the injection molding process and material characteristics (such as PET, PP, PS, etc.), processing feasibility and assembly rationality, convenience of use and maintenance, mold life and maintainability.
  • Zhejiang Chenghui Mould Co., Ltd.

    Part Size & Tolerance Control

    Each mold component has clear tolerances and process requirements during the 2D drawing stage. Each processing step undergoes self inspection and re inspection. Special inspections will be conducted on key components to ensure that their dimensions, fit, and functionality meet all standards.
  • Zhejiang Chenghui Mould Co., Ltd.

    Processing & Assembly

    Internally complete high-speed CNC, EDM, deep hole drilling, precision carving and other processes, strictly adhere to tolerance and process testing.
  • Zhejiang Chenghui Mould Co., Ltd.

    Trial Molding & Verification

    Verify molding stability, dimensional accuracy, and appearance quality through multiple rounds of mold testing, and provide complete parameters.

Process

Standardized Design & Manufacturing Process

Standardize with standards and build craftsmanship with processes.

Systematic design layout, standardized precision and intelligent manufacturing, clear process flow, unified procedures, strict control of quality details, ensuring stable product quality, and efficiently empowering large-scale production.

  • Customers provide drawings/samples/requirement specifications.

  • Conduct Product Forming Feasibility Analysis (DFM).

  • Output 2D mold layout diagram (dimensions, gates, parting lines, cavity layout, ejection method, etc.) and confirm.

  • After customer confirmation, 3D design and CNC programming will be carried out (usually 3-7 days, extended for complex molds depending on the situation).

  • Start processing, manufacturing, assembly, and mold testing.

  • Customer acceptance, payment confirmation, and shipment.

  • Provide long-term technical support and after-sales service.