CategorySurface Quality & Contamination
Diagnose patchy gloss caused by local temperature, tool finish, trapped air, pressure, sheet orientation, contamination, or uneven contact.
- Symptom
- Surface Appearance
- Cause
- Heating & Temperature, Mold Geometry & Material Distribution
- Material
- General / Multiple Materials
CategoryProcess Control & Machine Diagnostics
Diagnose open, shorted, partially failed, or mechanically damaged heater elements that create cold bands, hot spots, slow cycles, and uneven sag.
- Symptom
- Poor Detail & Incomplete Forming
- Cause
- Heating & Temperature, Machine Setup & Controls
- Material
- General / Multiple Materials
CategoryProcess Control & Machine Diagnostics
Correct unequal electrical power between heater zones or phases that causes asymmetric heating, slow response, recurring hot and cold regions, or overload.
- Symptom
- Process Variation & Asymmetry
- Cause
- Heating & Temperature, Machine Setup & Controls
- Material
- General / Multiple Materials
CategoryProcess Control & Machine Diagnostics
Restore radiant heating lost to dust, resin vapor, oil, oxidation, damaged coatings, and warped reflectors behind thermoforming heater elements.
- Symptom
- Surface Appearance
- Cause
- Heating & Temperature, Contamination & Handling
- Material
- General / Multiple Materials
CategoryProcess Control & Machine Diagnostics
Diagnose changing heater output caused by element aging, reflector contamination, voltage variation, control faults, cooling, sensor drift, or wiring resistance.
- Symptom
- Process Variation & Asymmetry
- Cause
- Heating & Temperature, Machine Setup & Controls
- Material
- General / Multiple Materials
CategoryMaterials & Sheet Quality
Diagnose cracking and brittle tearing in HIPS caused by low sheet temperature, aging, recycled content, sharp geometry, orientation, or unsuitable grade.
- Symptom
- Tearing, Cracking & Whitening
- Cause
- Moisture & Material Condition, Heating & Temperature
- Material
- HIPS
CategoryCooling, Shrinkage & Demolding
Prevent parts from bending, sagging, twisting, or losing flange geometry during transfer, stacking, trimming, and post-form cooling.
- Symptom
- Warping & Dimensional Distortion
- Cause
- Cooling, Shrinkage & Release, Contamination & Handling
- Material
- General / Multiple Materials
CategoryClamping, Sheet Loading & Tool Setup
Identify sheet thickness variation that changes heating, sag, draw, wall distribution, trim position, and cycle stability across sheets or batches.
- Symptom
- Thinning & Thickness Variation
- Cause
- Moisture & Material Condition, Machine Setup & Controls
- Material
- General / Multiple Materials
CategoryHeating & Sheet Temperature
Find the causes of incomplete forming, soft corners, shallow features, and poor mold detail related to heat, airflow, venting, tooling, or timing.
- Symptom
- Poor Detail & Incomplete Forming
- Cause
- Heating & Temperature, Vacuum & Venting
- Material
- General / Multiple Materials
CategoryCooling, Shrinkage & Demolding
Correct weak or delayed release air by checking valve response, blocked passages, supply pressure, sealing, timing, mold mounting, and part stiffness.
- Symptom
- Sticking & Release Damage
- Cause
- Cooling, Shrinkage & Release, Pressure & Airflow
- Material
- General / Multiple Materials
CategoryMold Design & Material Distribution
Understand how inadequate draft causes sticking, scuffing, distortion, long cooling, and release damage, and select draft for the actual tool and material.
- Symptom
- Sticking & Release Damage
- Cause
- Mold Geometry & Material Distribution, Cooling, Shrinkage & Release
- Material
- General / Multiple Materials
CategoryPre-Stretch & Plug Assist
Correct low or poorly shaped pre-stretch that causes webbing, corner thinning, bridging, and uneven material distribution in deep parts.
- Symptom
- Folds, Webbing & Bridging, Thinning & Thickness Variation
- Cause
- Pre-Stretch & Plug Assist, Pressure & Airflow
- Material
- General / Multiple Materials
CategoryVacuum, Pressure & Pneumatics
Diagnose vacuum capacity problems using evacuation time, enclosed volume, receiver pressure, pump performance, and the pressure required by the part.
- Symptom
- Poor Detail & Incomplete Forming
- Cause
- Vacuum & Venting, Machine Setup & Controls
- Material
- General / Multiple Materials
CategorySurface Quality & Contamination
Identify bubbles, gels, unmelted particles, and internal defects already present in sheet and separate supplier issues from forming problems.
- Symptom
- Bubbles & Blisters
- Cause
- Moisture & Material Condition, Contamination & Handling
- Material
- General / Multiple Materials
CategoryProcess Control & Machine Diagnostics
Correct infrared temperature errors caused by emissivity, transparency, reflection, masking, color, wavelength selection, and viewing geometry.
- Symptom
- Process Variation & Asymmetry
- Cause
- Heating & Temperature, Machine Setup & Controls
- Material
- General / Multiple Materials
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