Problem & Solution

Practical answers to common plastic material challenges

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Q

PP Cooling Time Setting

A

PP cooling is calculated by wall thickness; post-crystallization deformation must be prevented; 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 futu...

Molds & Tooling cooling time crystallization demolding cycle

Q

PP Long Glass Fiber LFT Processing

A

LFT-PP preserves fiber length; low shear and large gates; 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 future problems

Molds & Tooling LFT long glass fiber shear fiber length

Q

PP Gate Size Design

A

PP gates must be large enough to feed the large shrinkage; submarine pin-point gates for appearance parts; 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 s...

Molds & Tooling gate feeding sink mark size

Q

PP Draft Angle Design

A

PP's large shrinkage means strong clamping; draft angle starts at 1-2°; 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 future problems

Molds & Tooling draft angle shrinkage scratching polishing

Q

PP Shrinkage 1.0-2.5 Management

A

PP shrinkage 1.0-2.5% is a wide range; actual measurement compensation and locked process; 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 future pr...

Molds & Tooling shrinkage dimension wall thickness crystallization

Q

PP Mold Temperature and Crystallization

A

PP mold temperature 30-60°C is normal; take the upper limit for crystallization strength; 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 future pro...

Molds & Tooling mold temperature crystallization cycle strength

Q

PP Glass Fiber Reinforced Processing

A

For PP glass fiber material, upper-limit temperature and reduced speed, wear-resistant equipment; 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 fu...

Molds & Tooling glass fiber melt temperature rotation speed wear resistance

Q

PP Vent Groove Design

A

PP venting 0.02-0.04mm; shallow traps air and deep causes flash; 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 future problems

Molds & Tooling vent groove air entrapment flash depth

Q

PP Gate 50/60 Rule

A

The 50/60 rule for PP gates is a design standard; position and size are equally important; ensure feeding and prevent sink marks.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PP; gate; 50/60 rule; wall thickness; feeding; sink mark

Q

PP Draft Angle 1-2°

A

PP draft angle is a design specification; textured surface compensation; ejection and surface are equally important.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PP; draft angle; 1-2°; texture; ejection; deformation

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