CategoryCooling, Shrinkage & Demolding
Undercut Damage During Demolding
Prevent tearing, whitening, and distortion as thermoformed parts pass over undercuts by controlling geometry, flexibility, cooling, and release motion.
Thermoforming Wiki
Diagnose thermoforming defects by symptom, cause, process area, and material.
CategoryMold Design & Material Distribution
Undercut Locking in Thermoforming
Prevent parts from locking onto recessed or projecting tool features by using split tools, retractable sections, controlled flex, and proper release timing.
CategoryVacuum, Pressure & Pneumatics
Undersized Vacuum Receiver
Identify a vacuum receiver that cannot supply the required initial evacuation and correct recovery, isolation, sizing, or cycle-demand problems.
CategoryCooling, Shrinkage & Demolding
Uneven Cooling Water Distribution
Correct parallel-circuit flow imbalance that causes cavity temperature differences, uneven shrinkage, release variation, and inconsistent cycle time.
CategoryHeating & Sheet Temperature
Uneven Heating in Thermoforming
Diagnose hot spots, cold spots, asymmetric draw, uneven sag, local tearing, and thickness variation caused by nonuniform sheet heating.
CategoryMold Design & Material Distribution
Uneven Wall Thickness in Thermoforming
Diagnose uneven thermoformed wall thickness caused by temperature gradients, first contact, tool geometry, plug design, friction, and sheet variation.
CategoryPre-Stretch & Plug Assist
Unstable Pre-Stretch Bubble Height
Stabilize pre-stretch bubble height by correcting sheet temperature, air delivery, leaks, sag, clamping, sensor setup, and material variation.
CategoryVacuum, Pressure & Pneumatics
Vacuum Check Valve Leakage
Detect a leaking vacuum check valve that allows receiver bleed-down, pump backflow, slow recovery, or inconsistent starting vacuum between cycles.
CategoryVacuum, Pressure & Pneumatics
Vacuum Gauge and Transducer Error
Correct false vacuum readings caused by poor gauge range, blocked ports, zero shift, calibration drift, response damping, wiring, or mounting location.
CategoryVacuum, Pressure & Pneumatics
Vacuum Leaks in Thermoforming
Find vacuum leaks that cause slow forming, poor detail, cycle variation, and uneven draw, then isolate the failed seal, hose, fitting, or valve.