CategoryCooling, Shrinkage & Demolding
Vacuum Lock During Demolding
Break vacuum lock between a formed part and smooth mold by restoring an air path, adjusting surface condition, and sequencing release air correctly.
Thermoforming Wiki
Diagnose thermoforming defects by symptom, cause, process area, and material.
CategoryVacuum, Pressure & Pneumatics
Vacuum Pump Performance Loss
Find declining vacuum pump performance caused by wear, contamination, oil condition, inlet restriction, overheating, leaks, or inadequate maintenance.
CategoryVacuum, Pressure & Pneumatics
Vacuum Timing Errors
Correct vacuum applied too early or too late and coordinate sheet transfer, tool closure, plug motion, sealing, and final evacuation.
CategoryVacuum, Pressure & Pneumatics
Vacuum and Blow-Off Valve Overlap
Diagnose sequence overlap that wastes vacuum, delays forming, overheats trapped air, or applies eject pressure before the part is ready for release.
CategoryProcess Control & Machine Diagnostics
Valve Timing Drift
Find changing vacuum, pressure, pre-stretch, and eject timing caused by valve wear, pilot pressure, controller delay, scan time, or sequence changes.
CategoryVacuum, Pressure & Pneumatics
Vent Hole Marks on Thermoformed Parts
Prevent nipples, dimples, and witness marks caused by oversized vents, excessive local sheet softness, high pressure differential, or rough vent edges.
CategoryCooling, Shrinkage & Demolding
Warping After Thermoforming
Diagnose thermoformed part warping caused by uneven cooling, wall thickness variation, residual stress, early demolding, tooling, or trim release.
CategorySurface Quality & Contamination
Water Spots on Thermoformed Parts
Prevent water spots caused by wet sheet, condensation, cooling mist, mineral residue, leaks, or poor drying before and after thermoforming.
CategoryHeating & Sheet Temperature
Webbing in Thermoforming
Diagnose webbing between mold features and correct sheet temperature, cavity spacing, pre-stretch shape, vacuum sequence, and material distribution.
CategoryHeating & Sheet Temperature
Wrinkles in Thermoformed Parts
Understand compression wrinkles in thermoformed parts and correct temperature, forming sequence, pre-stretch, geometry, and excess material.