Plastic injection mold design is one of the most important processes that has a direct influence on product quality, production efficiency, and cost. As a professional plastic injection mold factory, Wanjiada combines engineering potential with real experience to offer molds that meet our client requirements. Theﷺ following is a step-by-step process of designiꦗng an efficient injection mold.

Product Analysis and Requirements

Understand the Part Design: Examine the 3D CAD model ofꩵ the plastic part and determine key features (e.g., wall thickness, undercuts, ribs, and bosses).

Material Selection: Choose the right plastic resin (e.g.,🌸 ABS, PP, PC) based on part function, strength,ও and use environment.

Surface finish and tolerances: Define the surface texture (e.g., shiny, coarse) and the dimensional tolerances t𝔉o ensure that the end product meets the standards.

Determine the Mold Type and Structure

Mold Type: Decide between a🧔 two-plate mold (simpler) or a three-plate mold (complex parts with multiple gates).

Cavity Layout: Optimize the number of 🍒cavities based on production volume and part geometry. Multi-cavity mo🌠lds increase efficiency but require precise balancing.

Parting Line (PL): Design the parting line to minimize flash and ensure smooth ejection. The PL location depends on part geo꧂metry and aesthetic requirements.

Gate and Runner System Design

Gate Type:⭕ Select the optimal gate (e.g., edge gate, submarine gate, hot runner) to control material flow and minimize visible marks.

Runner Layout: Design balanced runners to ensure uniform filling of ♏all cavities. Cold runners are cost-effective, while hot runners reduce waste and cycle time.

Cooling System Design

Cooling Channels: Strategical🐠ly place cooling channels near high-heat areas to ensure uniform cooling and prevent wꦓarping or sink marks.

Material Compatibility: Use corrosion-resistan💞t materials (e.g., beryllium copper) for 🀅inserts in high-wear zones.

Ejection System Design

Ejector Pins/Blades: Position ejectors to avoid part deformation and en♕sure smooth release.

Draft Angles: Incorporate draft angles (1–3°) 💝on vertical walls to facilitate ejection.

Venting and Surface Finish

Vents: Add micro-vents (0.𒆙02–0.04mm depth) to prevent air traps and burn🎶ing defects.

Texture and Polish: Apply surface finishꩲes (e.g., EDM, polishing) to meet aesthetic or functional needs.

Mold Material Selection

Prototyping and Testing

Trial (T0): Tꦉest the mold with short shots to validate filling, cooling, and ejection.

Adjustments: Optimize gate s♏ize, cooling rates, or venting based on trial r💃esults.

Why Choose Wanjiada for Custom Plastic Injection Molds?

At Wanjiada, we specialize in delivering high-performance, cos💜t-🎃effective molds tailored to your unique needs. Our advantages include:

• Expertise: 20+ years of experience in injection mold design for industries like consumer goods, toys, and packaging Industry.
• Advanced Technology: State-of-the-art CNC machining, EDM, and CMM inspection for micron-level precision.
• Rapid Prototyping: Accelerate time-to-market with quick-turnaround prototype molds.
• Cost Optimization: Design molds for longevity (500k+ cycles) while minimizing material waste and cycle time.
• End-to-End Support: From DFM analysis to post-mold services, we ensure seamless production.

Partner with Wanjiada to transform your plastic part co﷽ncepts into high-qualit🐓y, mass-produced realities. Contact us today to discuss your project!