1. Feeder
  • Glass too cold
 
1. Feeder
  • Correct the feeder temperature

 
2. Machine Setup and Operation
  • Bottom plate incorrectly set
  • Worn mold holders
  • Bottom plates running too hot
  • Bottom plate is too cold
  • Final blow pressure is too high
  • Blowhead off before mold cracks open
  • Oil on dead plate
  • Takeout going in as it picks up the bottle. Bottle will rock ever so slightly to area that has bottom parting line

 
2. Machine Setup and Operation
  • Set bottom plate correctly
  • Check dimensions of mold holders against repair dimensions
  • Apply cooling to bottom plate
  • Reduce cooling to the bottom plate
  • Reduce final blow pressure
  • Retime the blowhead off
  • Clean or replaced the deadplates
  • Adjust to takeout arm. If check is toward front, move take-out arm toward back
3. Mold Equipment
  • Incorrect relief of bottom plates
  • Mold not relieved correctly

 
3. Mold Equipment
  • Ensure bottom plate is properly relieved
  • Relieve mold correctly
4. Conveyor
  • Dirty or worn conveyor belt
  • Conveyor too long
  • Ware pusher set too low
  • Excessive use of guide wire on the conveyor
  • Incorrect insulation of transfer plates
  • Too long time on the deadplates
4. Conveyor
  • Change the conveyor belt
  • Warm the conveyor belt or change to a machine with a shorter conveyor
  • Raise the ware pushers
  • Remove unnecessary guide wires from the conveyor, or else insulate
  • Reduce surface area of transfer plates or insulate with suitable material
  • Shorten time on the deadplate

 
5. Stacking Equipment
  • Incorrect timing at stacking pick-up points
5. Stacking Equipment
  • Adjust timing of stacker  

Note: A base check can cause the bottom to break, especially if the container is filled with a hot liquid or is subject to heat during processing the contents