If the air can’t escape, it will be compressed by the melt.
This leads to an increase in temperature and builds burn marks (black marks on the polymer).
A better venting or slower injection at lower temperatures can solve this issue in most cases.

Burn Mark in Plastic Industry


Injection Molding Error: A burn mark at the end of the flow front


Related topics:

This glossary of plastic industry is provided by PLEXPERT Canada Inc.
FORGOT PASSWORD ?
Lost your password? Please enter your username or email address. You will receive a link to create a new password via email.
We do not share your personal details with anyone.