(for screws or locating pins) should be designed with:
| Gate Type | Advantages | Disadvantages | Best Use | |-----------|------------|---------------|-----------| | | Simple, easy to trim | Visible scar | Flat parts, general purpose | | Submarine (Tunnel) | Automatic degating | Requires draft angle | High volume, small parts | | Pin Point (3-plate) | Multiple gates, balanced flow | Wastes more material | Round or symmetrical parts | | Fan Gate | Reduces jetting, low stress | Wide scar | Large, flat, warp-sensitive parts | | Diaphragm | Concentric fill, no weld lines | High pressure loss | Tubes, cylinders, gears | | Valve Gate (Hot runner) | No gate vestige, active control | Expensive, complex | Aesthetic surfaces, cleanroom | injection mold design guide
For side holes or external undercuts.
Master the Mold: Essential Injection Mold Design Guide Designing for injection molding is a strategic balance of physics, material science, and mechanical engineering. Success depends on optimizing parts to fill, cool, and eject efficiently without defects like warping or sink marks. 1. Fundamental Design Principles Uniform Wall Thickness (for screws or locating pins) should be designed
The guide showed a sketch: 1–2 degrees per side. Without it, the part becomes a concrete block in a steel cage. Sam added 1.5° to every vertical face. Sam added 1