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Praktische Antworten auf häufige Herausforderungen mit Kunststoffmaterialien

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Q

POM mold parting line material leakage

A

Parting line material leakage needs to distinguish between wear and insufficient clamping; the former requires mold repair and the latter machine adjustment, and misjudgment causes flash to recur.; after confirming effectiveness, fix the parameters and practices into the work instruction to preve...

Molds & Tooling POM；parting line；flash；clamping force；wear；mold repair

Q

POM product ejector pin marks

A

Ejector pin marks are the result of improper ejection timing and layout; sufficient cooling plus reasonable ejection design can eliminate the risk of marks and micro-cracks.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling POM；ejector pin marks；ejection；cooling；layout；gripping

Q

POM hot runner color change difficulty

A

Color change efficiency depends on the hot runner structure; dead-corner-free design and production sequencing management can greatly reduce color change scrap and time.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling POM；hot runner；color change；dead corners；cleaning；production sequencing

Q

POM multi-cavity dimensional inconsistency

A

Multi-cavity consistency relies on the dual balance of runners and cooling; establishing dimensional archives by cavity position can precisely guide mold repair and process compensation.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling POM；multi-cavity；dimension；balance；runner；cooling

Q

POM product brittle cracking and insufficient toughness

A

Brittle cracking requires distinguishing between two types of causes: material degradation and structural stress; check temperature history for degradation, and check mold temperature and gate for stress, treating each accordingly.; after confirming effectiveness, fix the parameters and practices...

Molds & Tooling POM；brittle cracking；degradation；internal stress；weld line；toughness

Q

POM product uneven surface gloss

A

Uneven gloss is a surface projection of the mold temperature distribution; water line balancing modification can solve it at once, and daily monitoring of water temperature and flow stability is needed.; after confirming effectiveness, fix the parameters and practices into the work instruction to...

Molds & Tooling POM；uneven gloss；mold temperature；water lines；replication；surface

Q

POM mold fouling deposition

A

Mold fouling is a typical mold contamination in POM processing; combine temperature control with regular cleaning, and reduce precipitates at the material grade level when necessary.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling POM；mold fouling；precipitation；deposition；mold wiping；grade

Q

POM obvious gate marks

A

Gate marks affect appearance and stress distribution; select the gate form according to the product appearance grade, and submarine gates suit automation and appearance requirements.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling POM；gate marks；appearance；shear；submarine gate；design

Q

POM product dimensions too small

A

Undersized dimensions are adjusted in the opposite direction to oversized ones; first determine the feeding state before changing parameters, and avoid large simultaneous adjustments of holding pressure and mold temperature introducing new fluctuations.; after confirming effectiveness, fix the pa...

Molds & Tooling POM；undersized dimensions；shrinkage；holding pressure；mold temperature；adjustment

Q

POM product dimensions too large

A

Oversized dimensions point to excessive feeding or high mold temperature; POM shrinkage is sensitive to holding pressure, and dimensional debugging should be based on measured shrinkage.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling POM；oversized dimensions；holding pressure；shrinkage；mold temperature；compensation

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