The Rookie
3rd June 2020, 08:46 PM
Hello,
We are seeing what our team calls embedded bubbles and were wondering if anyone has any insight or experience.
Cavities: 64
Material: PET
Delivery: Direct Valve Gates
If you cannot view the images attached I will try to explain what we are seeing.
Essentially there is a bubble with an opaque tail following it. Many of our quality associates refer to this defect as an icecream cone or a flaming comet.
Normally we see these defects when we initially start up the machines, but occasionally we will find one in a process that has been running for hours. If there are stoppages (mold protections) the press might be down for 10-15 minutes and the operators will immediately start saving parts without allowing the process to settle back in. We will find them here quite often.
So my question is - what is causing this and is it possible to prevent it?
Thanks,
Rook
We are seeing what our team calls embedded bubbles and were wondering if anyone has any insight or experience.
Cavities: 64
Material: PET
Delivery: Direct Valve Gates
If you cannot view the images attached I will try to explain what we are seeing.
Essentially there is a bubble with an opaque tail following it. Many of our quality associates refer to this defect as an icecream cone or a flaming comet.
Normally we see these defects when we initially start up the machines, but occasionally we will find one in a process that has been running for hours. If there are stoppages (mold protections) the press might be down for 10-15 minutes and the operators will immediately start saving parts without allowing the process to settle back in. We will find them here quite often.
So my question is - what is causing this and is it possible to prevent it?
Thanks,
Rook