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Gate types
Jan 29, 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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