Problem & Solution

Practical answers to common plastic material challenges

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Q

GPPS Product Poor Surface Gloss

A

Transparent part gloss depends on mold surface and replication quality; mirror polishing is a basic investment.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PS;GPPS;gloss;haze;polishing;mold temperature

Q

GPPS Product Flash

A

Flash treatment should distinguish between two types of causes: insufficient clamping and mold wear.; 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 simila...

Molds & Tooling PS;GPPS;flash;clamping force;parting line;wear

Q

GPPS Product Sink Marks

A

GPPS sink marks follow the feeding mechanism; structural uniformity is the fundamental solution.; 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 pr...

Molds & Tooling PS;GPPS;sink mark;holding pressure;wall thickness;coring out

Q

GPPS Product Deformation and Warpage

A

The main causes of warpage of non-crystalline materials are orientation stress and uneven cooling; mild process is the prevention direction.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PS;GPPS;warpage;cooling;orientation;holding pressure

Q

GPPS Product Ejector Whitening and Cracking

A

The ejection system of brittle materials should be designed to higher standards; dispersing ejection force is the basic principle.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PS;GPPS;ejector whitening;ejector cracking;ejection;draft

Q

GPPS Product Brittle Cracking

A

GPPS brittle cracking should be investigated along two lines: material degradation and internal stress; transparent parts can use polarizers to observe stress distribution to assist positioning.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent...

Molds & Tooling PS;GPPS;brittle cracking;degradation;internal stress;weld line

Q

PP Glass Fiber Warpage

A

The root of PP glass fiber warpage is orientation and crystallization, the gate is the key; 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...

Molds & Tooling glass fiber warpageorientationgatecrystallization

Q

PP Surface Orange Peel

A

PP orange peel stabilizes the front plus polishing, uniform crystallization assists; 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...

Molds & Tooling orange peelhigh glossfrontpolishing

Q

PP Weld Line Bubbles

A

For PP weld line bubbles check venting and 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

Molds & Tooling weld line bubblesventingconfluencemoisture

Q

PP Delayed Deformation Post-Crystallization

A

PP post-crystallization causes delayed deformation, sufficient cooling and annealing stabilize; 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 prob...

Molds & Tooling post-crystallizationdeformationannealingaging

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