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Q

Orange peel on the surface of PP products

A

Orange peel is a manifestation of poor replication; increasing temperature and speed to improve replication ability can improve it.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PP; orange peel; surface; mold temperature; replication; polishing

Q

Improper temperature gradient in PP '2079851475616104452

A

The temperature gradient is the basic setting of plasticization quality; the actually measured melt temperature is more reliable than the displayed setting.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PP; temperature gradient; plasticization; degradation; melt temperature; calibration

Q

Improper matching of PP '2079851475616104452 machine

A

Machine matching is the premise of stable production; quality problems beyond the reasonable utilization range should not be endured by forcing machine adjustments.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PP; '2079851475616104452 machine; matching; shot volume; clamping force; stability

Q

Shrinkage prediction of PP '2079851475616104452

A

Shrinkage prediction moves from experience to data-based methods; mold flow analysis plus actual measurement feedback can greatly reduce the number of mold corrections.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PP; shrinkage; prediction; CAE; regression; mold correction

Q

Deformation aging out-of-tolerance of PP injection molded parts

A

Seasonal fluctuation must be eliminated by constant temperature control; SPC can detect dimensional drift trends early.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PP; dimensions; season; mold temperature; SPC; crystallization

Q

Melt fracture of PP injection molded parts

A

PP melt fracture is mostly seen with high-speed filling through small gates; coordinated adjustment of temperature, gate, and speed can eliminate it.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PP; melt fracture; gate; shear; temperature; speed

Q

Bubbles and vacuum voids in PP injection molded parts

A

PP thick-wall vacuum voids are a structural feeding problem; design thinning takes priority, with process compensation as a supplement.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PP; bubble; vacuum void; thick wall; holding pressure; coring out

Q

Ejection whitening of PP injection molded parts

A

Ejection whitening is a signal of local stress overload; ejection system optimization and sufficient cooling are the standard countermeasures.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PP; ejection whitening; ejection; stress; cooling; draft angle

Q

Floating fibers of glass fiber reinforced PP

A

Floating fibers affect appearance and coating adhesion; increasing temperature and speed to improve surface covering ability is a general countermeasure.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PP; glass fiber; floating fiber; surface; covering; temperature

Q

Flash and overflow of PP thin-wall parts

A

The thin-wall high-pressure process has high requirements for the clamping capacity of the equipment; flash treatment requires the coordination of equipment, mold, and process.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding PP; thin wall; flash; clamping force; platen; overfilling

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