Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

Excessive material plastication / degradation and crosslinking

A

The essence of degradation yellowing is chain scission and chemical changes of polymer molecular chains under high temperature and high shear conditions. The core of the solution is "three controls": control processing temperature within the material recommended range, control residence time to a...

Processing Machinery degradation yellowingprocessing temperatureresidence timeheat stabilizerPVC dehydrochlorination

Q

Heater band overheating and burnout

A

This problem is a typical manifestation of heater band overheating and burnout in extrusion molding. The core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, speed, pressure) and precision correction of the die/s...

Extrusion & Post heater band overheating and burnout

Q

Poor venting in feed section

A

This problem is a typical manifestation of poor venting in feed section in extrusion molding. The core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, speed, pressure) and precision correction of the die/sizing s...

Extrusion & Post poor ventingvent port spewingvacuum pipelinescrew conveying matchingvent port design

Q

Extruder torque too high

A

This problem is a typical manifestation of extruder torque too high in extrusion molding. The core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, speed, pressure) and precision correction of the die/sizing syste...

Extrusion & Post screen cloggingraw material cleanlinessfiltration mesh countgel particlesautomatic screen changer

Q

Insufficient pipe burst pressure

A

This problem is a typical manifestation of insufficient pipe burst pressure in extrusion molding. The core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, speed, pressure) and precision correction of the die/sizi...

Extrusion & Post internal stresscooling ratedraw ratioannealing treatmentmolecular orientation

Q

Profile opening dimension/gap out of tolerance

A

This problem is a typical manifestation of profile opening dimension/gap out of tolerance in extrusion molding. The core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, speed, pressure) and precision correction o...

Extrusion & Post uneven shrinkage ratespeed ratio orientationcooling uniformityheat setting temperatureincoming material shrinkage rate

Q

Die head leakage

A

This problem is a typical manifestation of die head leakage in extrusion molding. The core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, speed, pressure) and precision correction of the die/sizing system. It is...

Extrusion & Post extruder torquemelt viscosityscreen cloggingscrew wearfeeding amount

Q

Vacuum sizing section blockage

A

This problem is a typical manifestation of vacuum sizing section blockage in extrusion molding. The core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, speed, pressure) and precision correction of the die/sizing...

Extrusion & Post coating precipitation chalkingformulation compatibilitysufficient curingUV stabilizerweather resistance

Q

Abnormal extrusion swell

A

This problem is a typical manifestation of abnormal extrusion swell in extrusion molding. The core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, speed, pressure) and precision correction of the die/sizing syste...

Extrusion & Post extrusion swelldie swellmelt elasticitydie dimensionsdraw ratio

Q

Die flow marks (flow lines)

A

This problem is a typical manifestation of die flow marks (flow lines) in extrusion molding. The core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, speed, pressure) and precision correction of the die/sizing sy...

Extrusion & Post die buildupdie lip buildupdie temperatureadditive precipitationflow channel dead corners

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