When liquid plastic or molten metal is injected into a mold under high pressure, a small amount often escapes through the seam where the mold halves meet. This creates a thin, unwanted fin on the finished part. Operators must remove it using a manual trimming process or automated deflashing equipment.
We're getting heavy molding flash on the left side of the casing, so check the clamping pressure on the press.
Also heard as
- flash
- burr
Related terms
Defect
Any deviation from product specifications that impairs cosmetic appearance or functional performance.
Rework
The correction of defective, failed, or non-conforming items during the manufacturing process.
Cosmetic second
A fully functional product with a visual defect that is sold at a discount.
Stripper plate
A metal plate in a stamping die that pulls the raw material off the punch after a stroke.