1. Feeder Gob too heavy   1. Feeder Check gob weight 2. Machine Setup and Operation Parison is too cold Reheat time insufficient so that the skin on parison is too cold to blow out completely Pressing pressure too high Glass under baffle Incorrect setting of baffle Distorted baffle arm Badly fitted lock ring Incorrect timing of baffle mechanism Counter blow too early (blow land blow) Plunger up time too early (press and blow) Incorrect machine differential Revert height Bad baffle cup on baffle arm   2. Machine Setup and Operation Reduce counter blow Increase reheat time Reduce pressing pressure Check baffle for glass embedded in it Check the setting of baffle Check the baffle arm for squareness Check fit of lock ring Adjust timing of baffle mechanism Retard counter blow time (blow and blow) Retard plunger up time (press and blow) or advance baffle on time Advance machine differential, if possible and advance baffle on time 3. Mold Equipment Incorrect match between baffle and blank Oval or misshaped blank at baffle match Baffle is incorrectly designed 3. Mold Equipment Check blank and baffle match when blank is cold and hot Check fit between baffle and blank Check size of baffle cavity with regard to baffle and size of blank