Problem & Lösung

Praktische Antworten auf häufige Herausforderungen mit Kunststoffmaterialien

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HDPE blown film thickness deviation

Transverse thickness goes back to the die lip and air ring.

Extrusion & Post HDPE; blown film; thickness deviation; die lip; air ring

HDPE blown film bubble instability

Stable bubble = stable extrusion + uniform air ring + quiet environment.

Extrusion & Post HDPE; blown film; bubble instability; air ring; extrusion fluctuation

HDPE film gel (fisheye)

Extrusion & Post HDPE; blown film; gel; fisheye; plasticization

HDPE product ESCR stress cracking

HDPE holding chemicals, ESCR verification cannot be skipped.

Production & Quality HDPE; ESCR; stress cracking; medium; grade

HDPE '2079851475616104452 flash

Low viscosity + high shrinkage = the balancing act between flash and sink marks.

Injection Molding HDPE; '2079851475616104452; flash; clamping force; parting line

HDPE '2079851475616104452 sink marks

Sink marks are tackled with both holding pressure and structural material reduction.

Injection Molding HDPE; '2079851475616104452; sink mark; holding pressure; rib thickness

HDPE '2079851475616104452 warpage

Injection Molding HDPE; '2079851475616104452; warpage; shrinkage rate; cooling

HDPE '2079851475616104457 regrind utilization problem

2079851475616104457 regrind: clean, dry, small amount, matched.

Blow Molding HDPE; '2079851475616104457; regrind; gel; fine powder

HDPE '2079851475616104457 cycle too long

Compress the cycle from both ends: temperature and blowing efficiency.

Blow Molding HDPE; '2079851475616104457; molding cycle; cooling; blowing air

HDPE '2079851475616104457 excessive flash

For large flash, reduce pressure first, then check mold fit.

Blow Molding HDPE; '2079851475616104457; flash; mold line; pre-blowing

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