Case erector Troubleshooting

Symptoms: Repeated stops at the magazine, torn or double-fed blanks, operators camped at the infeed. Likely causes: Warped or damp corrugated blanks; Worn or wrong vacuum cups; Magazine over- or under-loaded; Adhesive or dust on pick faces. Fixes: Store board dry and flat, rotate stock, and reject pallets stored against cold walls; damp board droops and double-feeds. Replace cracked cups, match cup spec to board weight and verify vacuum level and pump filters. Keep the stack in the designed working band and square to the pick face; train to top-up little and often. Clean pick plates and cups on a fixed cadence; board dust kills grip mid-shift. Prevention: Board storage discipline, cup replacement on schedule, magazine level marks, pick-face cleaning cadence.

Symptoms: Skewed cases jam the packer downstream, flaps misalign at sealing, pallet loads lean. Likely causes: Worn forming mandrel or guides; Side belts gripping unevenly; Board crush or score-line variation; Pick-to-fold timing off. Fixes: Inspect and replace worn forming surfaces; renew guide rails and keep set-up dimensions to spec. Check belt wear and pressure balance; uneven drive twists the case during folding. Audit incoming board scores and crush; poor converting folds off-line no matter how good the machine is. Verify machine timing after any jam clearance; part-formed cases indicate the fold started before the blank seated. Prevention: Forming-section wear checks, incoming board audits, timing verification after crash clearances.

Symptoms: Cases re-open on the conveyor, glue strings but no bond, rejects at the packer. Likely causes: Glue temperature low or char in the tank; Blocked or misaimed nozzles; Compression time too short; Dusty or high-recycled-content board. Fixes: Verify tank and hose temperatures, drain and clean charred adhesive, and keep the melt at the adhesive maker's spec. Clean or replace nozzles and confirm bead placement and size against the pattern drawing. Check compression-section length and belt speed give the adhesive its open/set time. Test bond on each board lot; adjust add-on weight or adhesive grade for hard-to-bond liners. Prevention: Adhesive system PM (filters, nozzles, tank cleanliness), bead pattern checks per SKU, bond tear tests each shift.