Problem & Solution

Practical answers to common plastic material challenges

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Q

PVC Burnt

A

For PVC burnt, venting and cooling are applied together; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future

Processing Machinery PVCburnttrapped gasventing

Q

PVC Silver Streak

A

For PVC silver streaks, troubleshoot moisture first, then shear; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future

Material Drying PVCsilver streakmoistureshear

Q

PVC Bubble Troubleshooting

A

For PVC bubbles, check degradation first, then moisture; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future

Material Drying PVCbubbledegradation gastroubleshooting

Q

PVC Black Streak Troubleshooting

A

Black streaks are a signal of retention carbonization—stop the machine and troubleshoot immediately; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar...

Molds & Tooling PVCblack streakcarbonizationretention

Q

PVC Recycled Material Odor

A

The odor of recycled PVC is a VOC problem; source control and devolatilization are application prerequisites; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Analysis PVC;recycled material;odor;VOC;devolatilization

Q

PVC Corrosion Cycle

A

PVC corrosion is a self-reinforcing cycle—prevent corrosion plus prevent degradation; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in th...

Molds & Tooling PVCcorrosionmold surfacechrome plating

Q

PVC First-Piece Verification

A

PVC first-piece verification must include temperature and color; gradual degradation can only be found early by reference sample comparison; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PVC;first-piece verification;color reference;material change;temperature

Q

PVC Sink Mark Holding Pressure

A

Holding pressure is effective for PVC sink marks but treats the symptom; structural thinning is the root cure—use both in combination; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PVC;sink mark;holding pressure;thick wall;structural design

Q

PVC Surface Roughness

A

For surface roughness, check plasticization first, then the mold surface; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future

Molds & Tooling PVCsurface roughnessplasticizationmold surface

Q

PVC Embrittlement Degradation Consequence

A

PVC embrittlement is hidden degradation; mechanical sampling intercepts earlier than appearance inspection; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Analysis PVC;embrittlement;degradation;impact;hidden

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