Problem:

Webbing

Possible Cause:

(1) Sheet too hot
(2) insufficient vacuum
(3) Sharp corners on deep draw
(4) Improper mould layout
(5) Vacuum rate too fast

Suggested Course of Action:

• Decrease heating cycle time
• Decrease heater temperature
• Check vacuum system for leaks
• Check for clogged vacuum holes
• Increase number of vacuum holes
• Check for proper location of vacuum holes
• Increase size of vacuum holes
• Increase radius
• Increase spacing between moulds
• Use smaller vacuum holes/restrict main vacuum lines