Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

PVC Nozzle Temperature

A

PVC nozzle should be straight-through large bore plus temperature lower limit; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later

Processing Machinery PVC nozzle yellow spot straight-through

Q

PVC Hot Runner Risk

A

PVC with hot runner needs extra caution, cold runner is safer; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later

Molds & Tooling PVC hot runner dead corner cold runner

Q

PVC Barrel Temperature Zoning

A

PVC temperature gradient must be gentle, strictly prevent front zone overheating; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later

Processing Machinery PVC barrel temperature gradient plasticization

Q

PVC Screw Temperature

A

Screw condition is part of PVC residence control; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later

Processing Machinery PVC screw wear residence

Q

PVC De-HCl Autocatalysis

A

PVC degradation is an autocatalytic process, must be handled at first time; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later

Processing Machinery PVC de-HCl autocatalysis degradation

Q

PVC Narrow Processing Window

A

PVC adjustment must be small steps and fast pace, temperature window only 35℃; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later

Processing Machinery PVC processing window temperature control precision

Q

PVC Drying Temperature Upper Limit

A

PVC drying is a low-temperature short-time route, over-temperature consumes stabilizer; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later

Material Drying PVC drying temperature heat stabilizer yellowing

Q

PVC Drying Necessity

A

PVC drying requirement is not high but cannot be omitted across the board; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later

Material Drying PVC drying water absorption silver streak

Q

PVC Shutdown Handling

A

PVC shutdown procedure same principle as POM; replacement and emptying is standard action, omitting it means batch accident; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PVC; shutdown; replacement; PE purging; restart

Q

PVC Soft Extrusion Temperature

A

Soft PVC temperature management must also protect plasticizer; overheating loses not only appearance but also flexibility; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post PVC; soft; plasticizer; exudation; 130-170℃

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