Gate Vestige (Tall Gate Stub)

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Gate Vestige (Tall Gate Stub)

Last updated on Jul 22, 2026

(1) What is Gate Vestige? (Visual Defect)

Gate vestige is the phenomenon where gate material remains on the surface of molded parts.

Subgates or tunnel gates normally break off automatically during mold opening. However, improper gate geometry and dimensions may lead to incomplete severance, leaving residual material or protrusions on the part surface.

Figure 1: Gate Vestige on 50mm Square Plate (Pin Gate Φ0.7) Gate

📄 Definition

Incomplete gate breakage, leaving small column-shaped residue on the surface.

🎯 Risk Points

Impairs appearance, assembly and tactile feel; may cause sharp edges that cut operators.

👁 Inspection Focus

Check the residual height, sharpness, position, and whether it interferes with part function.

Inspection Checklist

☑ Measure the height of gate residue

☑ Distinguish gate vestige from foreign contaminants

☑ Pay attention to pin gate locations

☑ Take photos for documentation

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Gate Vestige (Tall Gate Stub)