Problem & Solution

Practical answers to common plastic material challenges

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Q

PC/ABS short shot

A

Short shot is troubleshooted from three paths: pressure, temperature, and runner.; 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 later

Molds & Tooling PC/ABS；short shot；pressure；temperature；runner；venting

Q

PC/ABS sink mark

A

Sink marks follow the shrinkage compensation mechanism; structural design is fundamental.; 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 PC/ABS；sink mark；holding pressure；wall thickness；gate；coring out

Q

PC/ABS weld line

A

Weld line management relies on temperature and gate; high mold temperature is particularly effective for PC/ABS weld lines.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PC/ABS；weld line；temperature；gate；confluence；venting

Q

PC/ABS warpage

A

PC/ABS warpage relies on mold temperature and cooling management; uniform cooling is the core.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PC/ABS；warpage；cooling；mold temperature；shrinkage；gate

Q

PC/ABS improper mold temperature

A

Mold temperature 70~100℃ is the PC/ABS standard range; higher mold temperature is beneficial to both weld line and gloss.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PC/ABS；mold temperature；weld line；gloss；replication；temperature distribution

Q

PC Product Surface Orange Peel

A

PC orange peel = 'poor replication': supplement both pressure and temperature; end replication of high-gloss parts is the difficulty, mold temperature and holding pressure must be given sufficiently; after confirming effectiveness, solidify the parameters and practices into the work instruction t...

Molds & Tooling PC; orange peel; surface replication; holding pressure; mold temperature

Q

PC Thin-Wall Transparent Part Flow Marks

A

PC thin-wall transparent parts 'have the highest requirements for flow stability': fine matching of speed and shear is the key; transparent parts amplify even tiny flow fluctuations; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurre...

Molds & Tooling PC; thin wall; flow mark; shear; hot runner

Q

PC Product Abnormal Dimensional Shrinkage After Demolding

A

For PC dimensional deviation, 'first unify the measurement benchmark': non-unified measurement conditions are the illusion of many 'drifts'; PC's low shrinkage does not mean you can do whatever you want, the benchmark must come first.

Molds & Tooling PC; shrinkage; dimension; holding pressure; measurement

Q

GF-PC Surface Floating Fiber

A

GF-PC floating fiber = 'insufficient encapsulation': raise temperature and slow down to let the resin wrap the fibers; the appearance surface needs process + texture + grade cooperation, and machine adjustment alone is hard to eradicate it.

Molds & Tooling PC; glass fiber; floating fiber; encapsulation; melt temperature

Q

GF-PC Warpage (Fiber Orientation)

A

For GF-PC warpage, 'first look at the fiber orientation map': gate design is the breakthrough point; orientation-type warpage has a fixed direction, pressing it hard with cooling is ineffective, it must be adjusted from the orientation source.

Molds & Tooling PC; glass fiber; warpage; orientation; Moldflow

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