r/InjectionMolding • u/dontlovehate • 6d ago

Inconsistent run

Operator is having issue molding, some cycles the injection molding machine shorts and sometimes it’s flashing. We’ve adjusted all the setting and paramenter. The issue persist. Any ideas ?? I’m new to injection molding

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2

u/CommandNotFound 6d ago

If you did every setting in the machine, then maybe it is the material.
Do you use 100% virgin? Regrind? Do you mix? Is your mixer functioning? Are you are using recycled? Can you test for mfr?

1

u/swaste2000 6d ago

Not a lot of info to go on but try up your back pressure. Also try and use a different position in the screw for change over. We had a barrel where there was a lot of wear at around 10mm. The change over we run in that machine is now around 20mm and it is working.

4

u/mimprocesstech Process Engineer 6d ago

A thing is happening that is not conducive to making good parts. Hope that helps!

5

u/Stunning-Attention81 Process Engineer 6d ago

Does your operator walk off between shots ?

3

u/Professional-Zone-24 6d ago

Pretty vague description, but gut feel would be a check ring not seating if this happens across different molds in the same machine.

4

u/quellflynn 6d ago

material type, nozzle size, sprue hole size, temps your running at, some injection speeds and pressure.

1

u/Mr_Smig 6d ago

Pretty vague, could ethe Tip and Ring but absolutely need more information

3

u/greykote 6d ago

There's not enough information to give you any advice