Common Plastic Injection Molding Defects

There are many potential plastic injection molding defects, so let's explore what these are, how they occur, and key preventative measures that you should take to avoid them.
The defects include:
- Sink marks
- Weld lines
- Short shots
- Burn marks
- and more
When you know what the defects are and how to avoid them, you're in a stronger position to point out these issues to your suppliers and to push them to make positive changes.
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[@geoffcrumblin7505]

This is the best explanation that I have seen. I will recommend this to my students

[@SofeastLtd]

Thanks, Geoff, we're happy you found it useful - can't wait to help your students!

[@tiffanybowman6541]

Thank you for making this video it is very informative

[@0086santosh]

Thanks for the information!
Can u please add a video covering shrinkage of plastic

[@dansorescu5720]

very informative video. thank you!

[@SofeastLtd]

So happy you found it useful! :)

[@dansorescu7504]

@@SofeastLtd looking forward to more videos on injection molding :)

[@DustinBai]

Good

[@jinnahkeeranur]

Sir i need more knowledge both injection moulding and technical knowledge

[@Vijaysmdn]

Can you sent this ducoument its very useful

[@khalidsayed6659]

Anyone knows about air venting in mould??

[@williamjimenez2821]

could you tell me please what happen if the parts sticking on the front half if not hAVE ejector pins

[@OffGridInvestor]

Ejection pins OR air pressure used to spit the part out are the standard ways. If the design of the mold is straight sided not slightly angled LARGER towards the opening side, it will often get wedged in the mold. The idea being that it will eject easily if it's slightly like a triangle with the pointy end inside the mold and the flat side on the side it ejects out of. Only has to be like a 2 degrees angle for this problem to be fixed.

[@mohammedubaid1323]

Can anyone tell what is box effect of plastic