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Gate Types of plastic injection mold
Jan 26, 2018

The two main gate systems are manually trimmed gates and automatically trimmed gates. The following examples show where they are used:

· Sprue gate: Used for large components, the gate mark is visible in component and no runner is required. e.g.: bucket molding (backside cylindrical gate mark visible and can be felt).

· Edge gate: Most suitable for square, rectangular components

· Ring gate: Most suitable for cylindrical components to eliminate weld line defect

· Diaphragm gate: Most suitable for hollow, cylindrical components

· Tab gate: Most suitable for solid, thick components

· Submarine gate: Used when auto de-gating is required to reduce cycle time

· Reverse taper sprue gate (Pin gate): Generally used in three plate molds.

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