Problem & Solution

Practical answers to common plastic material challenges

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Q

Low LCP Weld Strength Constrains Structural Design

A

Low weld strength is LCP's nature; eliminating or avoiding weld lines in design is the right way; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling weld strength structural design multiple gates reinforcing rib

Q

High LCP Mold Maintenance Frequency and Cavity Contamination

A

LCP precipitation contamination must be included in mold preventive maintenance; clean on a cycle to preserve venting; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling mold maintenance deposits vent groove cleaning maintenance

Q

Improper LCP Mold Temperature Setting Affects Performance

A

Mold temperature 70-130℃ is the performance adjustment knob of LCP; take the value by weighing appearance against strength; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling mold temperature 70-130℃ crystallization rate surface quality

Q

LCP Sticking to Mold and Demolding Difficulty

A

Mold sticking of LCP thin-wall parts is mainly caused by mold draft angle, polishing and ejection balance; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference ...

Molds & Tooling mold sticking draft angle ejection balance polishing

Q

LCP Jetting Marks and Surface Flow Marks

A

Jetting and flow marks are fundamentally cured by gate design and wall-contact filling; raising temperature is only auxiliary; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubl...

Molds & Tooling jetting mark flow mark gate design mold temperature

Q

LCP Dimensional Fluctuation and Batch Instability

A

LCP's low shrinkage amplifies process fluctuations; metering and mold temperature stability are the keys to dimensions; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling dimensional fluctuation check ring mold temperature accuracy SPC

Q

LCP Burning and Discoloration

A

For LCP burning, check venting and dead-spot stagnation first; residence time is a red line for high-temperature materials; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling burnt discoloration trapped air stagnation degradation

Q

LCP Flash and Overflow

A

Low-viscosity LCP is extremely sensitive to mold fitting accuracy; mold repair and clamping take priority over pressure reduction; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling flash low viscosity clamping force parting line

Q

LCP Short Shot and Incomplete Filling

A

LCP short shots are mostly due to rapid crystallization sealing; raising mold temperature, speeding up and venting take priority over raising melt temperature; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling short shot rapid crystallization mold temperature venting

Q

LCP Warpage and Anisotropic Shrinkage

A

Anisotropy is the root cause of LCP warpage; selecting a mineral-filled grade plus symmetric orientation is most effective; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling warpage anisotropy mineral filling shrinkage rate

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