المشاكل والحلول

إجابات عملية على التحديات الشائعة في مواد البلاستيك

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PVA angle deviation

Molds & Tooling PVAangle deviationshrinkage compensationmold designfull cooling

Obvious PVA surface color difference

Injection Molding PVAcolor differencecolor masterbatch dispersionpigment orientationtemperature stability

PVA length out of tolerance

Molds & Tooling PVAlength out of toleranceshrinkage ratemold compensationfull cooling

PVA surface orange peel pattern

Injection Molding PVAorange peel patternmold temperatureholding pressuresurface solidification

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

Severe PVA internal stress concentration

Injection Molding PVAinternal stressorientation stressannealing treatmentuniform cooling

Dense PVA surface pockmarks

Extrusion & Post PVAsurface pockmarkimpurity particlesmold repairraw material purity

PVA stress cracking

Production & Quality PVAstress crackingenvironmental stressannealing treatmenthigh molecular weight

PVA surface microcracks

Production & Quality PVAmicrocrackinternal stressannealing treatmentstress concentration design

Poor PVA surface gloss

Molds & Tooling PVAglossmold polishingcrystallization scatteringnucleating agent

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