1. Feeder
  • Glass is too hot
  • Gob is over weight 

 
1. Feeder
  • Adjust the temperature
  • Reduce the weight

 
2. Machine Setup and Operation
  • Too much reheat time
  • Final blow is too late
  • Parison is too soft
  • Baffle end of blank dirty
  • Plunger too cold (press and blow)
  • Baffle too cold
  • Bottom plate too cold
  • Excessive swabbing of the blank

 
2. Machine Setup and Operation
  • Reduce reheat time
  • Advance final blow
  • Increase counter blow
  • Change blank
  • Reduce cooling on plunger
  • Check cooling wind setup, reduce weight or baffle
  • Reduce cooling wind
  • Reduce the amount of swabbing on blank or baffle

 
3. Mold Equipment
  • Insufficient blank overcapacity
  • Baffle too large and heavy
  • Bottom plate too large and heavy

 
3. Mold Equipment
  • Increase blank overcapacity
  • Baffle too large and heavy
  • Bottom plate too large and heavy

 

Note: Mainly an appearance defect. May cause thin spots in other parts of the bottle.