Language
English Français Español عربى

Mould Design

Home / Mould Design
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 Makes an
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

Standardized Processes. Consistent Quality.

Systematic design, standardized precision, and intelligent manufacturing form the foundation of our production process. Every step follows clearly defined procedures and strict quality controls, ensuring consistent product quality and supporting efficient large-scale production.

  • Customers provide product drawings, samples, or technical specifications for review.

  • We conduct a DFM analysis to assess molding feasibility and identify potential design improvements.

  • We prepare a 2D mold layout covering key details such as gates, parting lines, cavity layout, and ejection methods for customer approval.

  • After approval, we complete the 3D mold design and CNC programming, typically within 3–7 days for standard projects.

  • We proceed with precision machining, mold assembly, and trial molding to verify mold performance.

  • After final inspection and customer approval, the mold is prepared for shipment.

  • We provide ongoing technical support and after-sales service throughout the mold's service life.