1. Feeder Glass too cold, causing difficult pressing on '62' operation when producing lightweight ware or tall jobs like milk bottles Glass too hot Gob weight too heavy (62 process)   1. Feeder Adjust gob temperature Check gob weight 2. Machine Setup and Operation Wear on blank and mold holders Wear on blank and mold linkage Incorrect blank and blow mold linkage alignment Incomplete stroke of blank and blow mold piston in cylinder Misalignment of plunger mechanism Carbon deposit on blank and blow mold halves Glass in interlocking fit or blank or blow mold Interference between blank and/or blow mold with block lock at operation temperature Plunger mechanism too high Excessive plunger and counterblow pressure Neck ring incorrectly set Bottom plate running too hot Blank mold too hot Baffle too hot   2. Machine Setup and Operation Change mold holders and check the old ones against repair dimensions Check blank and mold supporting for wear Check with mold and blank linkage aligning fixture Realign the plunger mechanism Change mold and blank Clean the mold and blow out the glass Check block lock fitting at operating temperature for tightness Adjust plunger mechanism height Reduce counterblow pressure Check invert mechanism with neck ring mechanism aligning fixture Apply cooling to bottom plate Increase the cooling on blank Apply cooling to baffle   3. Mold Equipment Recess on blank and mold for either plunger or block lock location incorrectly made or too tight fit Interference between neck ring and blank mold neck ring diameter too large Unsuitable pressing gate on parison design (press and blow) Blank and molds insufficiently hollow scraped - insufficient relief or interlocking fits and for tongue and groove fits Blank and mold warped and/or worn out Bottom plate holding blow mold open Incorrect selection of bottom plate size   3. Mold Equipment Check fit for plunger lock or blank lock Check the neck ring and blank mold with mold gauges Redesign parison with proper pressing gate Maker sure that hollow face scraping is sufficient Check volume of blank and plunger for gob weight Check bottom plate with gauges for faulty manufacture, buildup of carbon, or glass in bottom plate dovetail Check selection of bottom plate size