Common Issues & Solutions

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Common Problems and Solutions

Surface Pores/Air Streaks

BMC Solution: Add venting slots; Raise the mold temperature; Extend the holding time

SMC Solution: Add venting slots; Raise the mold temperature; Extend the holding time

Phenolic Resin Solution: Increase venting frequency; Reduce the amount of material added; Uniform mold temperature

Excessive Overflow And Burrs At The Edges

BMC Solution: Control the feeding amount; Check the locking force of the mold

SMC Solution: Control the size of the cut pieces; Mold accuracy correction

Phenolic Resin Solution: Adjust the feeding amount and pressurization speed

The Product Is Brittle And Cracked

BMC Solution: Reduce glass fiber content or improve resin toughness

SMC Solution: Optimize fiber distribution; avoid fiber breakage

Phenolic Resin Solution: Reduce curing speed and use toughening modifiers

Dimensional Instability

BMC Solution: Control the moisture content of the raw materials; maintain stable mold temperature

SMC Solution: Control the moisture content of the raw materials; maintain stable mold temperature

Phenolic Resin Solution: Same as BMC, and control the consistency of the curing time

Difficulty In Demolding

BMC Solution: Use appropriate release agent; mold polishing

SMC Solution: Use appropriate release agent; mold polishing

Phenolic Resin Solution: Increase release agent, chrome plating or nitriding of the mold

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