CategoryClamping, Sheet Loading & Tool Setup
Sheet Orientation and Memory Distortion
Diagnose curl, twist, anisotropic shrinkage, and directional tearing caused by residual extrusion orientation or incorrect sheet loading direction.
Thermoforming Wiki
Diagnose thermoforming defects by symptom, cause, process area, and material.
CategoryMold Design & Material Distribution
Sheet Pull-In Distortion
Diagnose sheet pull-in at the clamp edge and correct insufficient grip, excessive forming load, hot edge zones, poor frame design, or damaged sheet.
CategoryCooling, Shrinkage & Demolding
Shrinkage Distortion in Thermoforming
Understand shrinkage distortion in amorphous and semicrystalline sheet and control tool temperature, orientation, cooling, geometry, and release.
CategoryVacuum, Pressure & Pneumatics
Slow Vacuum Valve Response
Diagnose delayed or restricted vacuum-valve opening caused by actuator wear, low pilot pressure, contamination, undersized ports, or control lag.
CategoryProcess Control & Machine Diagnostics
Solid-State Relay Failure
Identify solid-state relays that fail open, fail closed, leak current, overheat, or switch intermittently and destabilize heater-zone output.
CategoryCooling, Shrinkage & Demolding
Stress Whitening During Demolding
Prevent white marks created during part release by correcting hot demolding, undercuts, poor draft, high friction, uneven cooling, and eject force.
CategoryTrimming & Secondary Operations
Stress Whitening at Trim Edges
Correct white trim edges caused by residual forming stress, excessive cutting deformation, blunt tools, poor support, or trimming at the wrong temperature.
CategoryHeating & Sheet Temperature
Stress Whitening in Thermoformed Parts
Learn why white marks appear during forming, plug contact, trimming, or demolding and how to reduce local strain, chilling, and residual stress.
CategoryProcess Control & Machine Diagnostics
Supply Voltage Drop
Find transient voltage drop that reduces heater power, slows recovery, destabilizes controls, or appears only when ovens, pumps, compressors, and motion systems operate together.
CategorySurface Quality & Contamination
Surface Haze in Thermoforming
Diagnose haze in clear thermoformed parts caused by moisture, overheating, underforming, crystallization, abrasion, contamination, or tool texture.