Problem & Lösung

Praktische Antworten auf häufige Herausforderungen mit Kunststoffmaterialien

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PVA screw slipping

Extrusion & Post PVAscrew slippingfeed section temperaturepremature meltingflight deepening

Large PVA dimensional change with temperature

Extrusion & Post PVAdimensional temperature sensitivitythermal expansion coefficientrigid fillerannealing treatment

PVA vacuum vent section material overflow

Overflow is caused by low melt viscosity; temperature reduction and baffle are the key

Extrusion & Post PVAvacuum vent overflowmelt viscositytemperature reductionvent baffle

Dense PVA surface pockmarks

Extrusion & Post PVAsurface pockmarkimpurity particlesmold repairraw material purity

PVA extruded pipe ovality exceeds standard

Extrusion & Post PVA pipeovalityannular coolingvacuum sizinguniform haul-off

Large current fluctuation of PVA extruder

Extrusion & Post PVA extrusioncurrent fluctuationtemperature control precisionscrew designfeeding stability

PVA extruded film has gel particles

Extrusion & Post PVA filmgel particlemelting temperaturemixing sectionhigh molecular weight component

PVA extruded film has transverse corrugations

Extrusion & Post PVA filmtransverse corrugationhaul-off vibrationcooling roller eccentricitypressure stabilizing device

Frequent screen clogging in PVA extrusion

Extrusion & Post PVA extrusionscreen clogginggel particlestepped screenautomatic screen change

PVA extruded film wrinkling during winding

Extrusion & Post PVA filmwinding wrinkletension controlthickness uniformityguide roller parallelism

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