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Q

PPS Silver Streaks and Bubbles

A

Troubleshoot PPS silver streaks along three paths: moisture, overheating, and contamination; when drying works but is incomplete, immediately turn to the latter two; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PPS; silver streak; bubble; overheating; contamination

Q

PPS Discoloration Streaks

A

PPS discoloration is a map of shear heat; streak positions guide the troubleshooting direction, and lowering temperature and speed is the main line; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PPS; discoloration; streaks; shear heat; retention

Q

PPS Poor Surface Gloss

A

For PPS matte problems, check mold temperature first; 130-150°C is the temperature threshold for glossy surfaces; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PPS; gloss; matte; mold temperature; polishing

Q

PPS Sink Marks

A

PPS sink mark treatment gives equal weight to holding pressure and structure; the rib ratio is the preventive line on the design side; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molding Process PPS; sink mark; holding pressure; rib; 60%

Q

PPS Warpage

A

PPS warpage treatment prioritizes structure; pin-point gates homogenize orientation plus balanced cooling, and over-holding is as bad as under-holding; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PPS; warpage; fiber orientation; pin-point gate; holding pressure

Q

PPS Grinding Equipment

A

The key point of PPS grinding is controlling fine powder; carbide blades plus sieving classification ensure regrind consistency; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PPS; grinding; carbide; fine powder; sieving

Q

PPS Full Regrind Feasibility

A

PPS's regrind tolerance stands out among engineering plastics; the 85% retention rate gives large reuse room for internal parts; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Analysis PPS; full regrind; 85%; thermal stability; recycling

Q

PPS Regrind Usage Ratio

A

PPS regrind management has clear ratio discipline; the 25-30% upper limit plus drying verification, stricter for UL parts; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Analysis PPS; regrind; 25-30%; UL; drying

Q

PPS Metal Insert Preheating

A

PPS insert preheating is a supporting process for high-temperature molding; 120-150°C preheating eliminates interfacial stress concentration; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PPS; insert; preheating; 120-150°C; stress

Q

PPS Draft Angle

A

PPS demolding must accommodate its brittleness; the three elements of draft angle, balanced ejection, and polishing are all indispensable; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PPS; draft angle; 0.25-1°; ejector whitening; polishing

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All Topics 11636 Material Drying 1439 Injection Molding 1506 Molding Process 740 Molds & Tooling 1506 Processing Machinery 2025 Extrusion & Post 2239 Blow Molding 315 Thermoforming 141 Material Analysis 1343 Production & Quality 382