Flashing
Flashing is also known as flash or burrs . It refers to plastics that leaks into a fine gap in the parting lines of the mold to create an undesired thin layer.
Flash in molded parts
Below are examples of flash in actual molded samples.
Why Flashing happens?
Flash is one of the molding defects. Here are the main reasons why this happens:
TIP: Rubber (TPE / TPR) and PP are easy to have flashing issue.