The use of a high performance spraying device enables a very efficient lubricant application. No oil is sprayed onto the plunger.
The swabbing of the blanks is standardized with equal application of lubricant in each blank.
Less lubricant is applied compared to manual swabbing. This allows the blank temperatures to return to normal levels faster.
Logically this results in significant gain in efficiency with less defects produced.
In addition, the operator, relieved from his swabbing task, is gaining time to control the IS-Machine more effectively.
Another side effect is that blanks stay cleaner for a longer period of time.
Besides an increased stand time, the blanks require less maintenance and repairs at the mould shop.
Verification with XPAR cameras shows constant glass distribution.
After manual swabbing, glass distribution is 45-50% on the shoulder, and 100-120% at the bottom.
After automatic swabbing, glass distribution is 25%-30% on the shoulder and 30%-40% at the bottom.
Even after swabbing cycles, glass distribution is still acceptable :
Constant glass distribution