1. Feeder Incorrect glass temperature-can be either too hot or too cold   1. Feeder Set feeder at correct temperature   2. Machine Setup and Operation Bottom plate is set too high or too low, causing drag on bottle shoulder when mold is opening Mold is running too hot, causing the bottle to stick to the mold Mold holders are worn, causing the mold to drag on the bottom plate when opening Too much final blow pressure blowing the bottle up too hard against the mold. (Final blow pressure should be regulated to be sufficient to keep the bottle in shape) Incorrect cooling wind application-mold too hot Blowhead timing incorrect-comes off before mold cracks Take-out tongs set too low-hitting the shoulder Mold opening too fast   2. Machine Setup and Operation Lower or raise bottom plate mechanism Apply more cooling wind to mold Change mold holders. Check the old mold holders against repair dimensions Reduce final blow pressure Adjust cooling wind application Check and adjust blow head timing Raise the height of take-out tong heads   3. Mold Equipment Mold not sufficiently relieved on bottom plate, causing bottle to drag on mold when mold is opened Flat shoulder container with insufficient relief on shoulder Incorrect positioning of parting line (add shaper containers)   3. Mold Equipment Improve relieve on bottom plate Ensure relief on mold shoulder Ensure correct positioning of parting line in mold