Mold Design Guide |best| — Injection

The gate is the entry point for the molten plastic. Its location and type determine how the cavity fills and how the part packs out.

Before detailing features, understand the three golden rules:

Used when a part requires gating in the center or at multiple points away from the perimeter. A three-plate mold features two parting lines, allowing the runner system to automatically separate from the part during mold opening. 4. The Feed System: Runners, Gates, and Sprunes injection mold design guide

POOR COOLING: OPTIMAL COOLING: Channels too far / unbalanced Conformed / Uniform Distance O O O O O O ___________________________ ___________________________ | _______________________ | | _______________________ | | | | | | | | | Circuit Geometric Layout

: Pins always leave a slight witness mark on the part surface. Ensure these marks are placed on non-cosmetic faces. The gate is the entry point for the molten plastic

For highly complex parts, standard drilled straight lines cannot reach every area uniformly. Conformal cooling utilize 3D-printed metal mold inserts to create curved, organic cooling channels that follow the exact geometry of the part, slashing cycle times and eliminating hot spots. 7. Ejection Systems

The gate is the narrow entrance where plastic enters the cavity. Choosing the right gate type prevents cosmetic blemishes and controls part packing. Parting Line Simple to machine; excellent flow control Leaves a visual vestige; requires manual trimming Sub (Tunnel) Gate Below Parting Line Automatically shears off during ejection Can cause high shear stress; limited to smaller parts Pin Gate Top/Face of Part Automatic degating; ideal for multi-cavity Leaves a small pimple on cosmetic surfaces Tab Gate Side of Part Reduces shear stress; prevents jetting Large vestige; requires secondary removal 5. Parting Lines, Shut-Offs, and Undercuts The Parting Line The parting line is where the two halves of the mold split. Whenever possible, place the parting line on a flat plane. A three-plate mold features two parting lines, allowing

Designing for manufacturability (DFM) is the first step in successful mold design. : Keep walls consistent ( mm) to prevent sink marks, voids, and warping. Draft Angles : Apply

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