Problem & Solution

Q

Wide temperature window of heat-resistant polyethylene PE raw material causes difficulty in process parameter optimization (Variant: strengthened measures)

A

PE temperature window optimization needs to be advanced from two aspects: systematic experiments and experience accumulation. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery temperature optimizationPE gradeDOEprocess parameterstemperature database

Q

Unstable output/surging in heat-resistant polyethylene extrusion process (Variant: mass production scenario)

A

Unstable output is caused by unstable solids conveying, and the barrel temperature and feeding system need to be optimized. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post unstable outputsurgingsolids conveyinghopper bridgingscrew rotation speed

Q

Dimensional fluctuation of heat-resistant polyethylene extruded products (Variant: mass production scenario)

A

Dimensional fluctuation is caused by unstable extrusion or haul-off, and each process parameter needs to be systematically stabilized. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post dimensional fluctuationscrew rotation speedhaul-off speedtemperature stabilityuniform feeding

Q

Heat-resistant polyethylene pipe longitudinal reversion rate exceeding standard (Variant: strengthened measures)

A

Excessive reversion rate is caused by large internal stress or excessive orientation, and needs to be solved from temperature control, cooling rate and haul-off speed. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post longitudinal reversion rateinternal stresscooling ratehaul-off speedmolecular orientation

Q

Heat-resistant polyethylene extruder screw design mismatch (Variant: mass production scenario)

A

Screw design needs to match material characteristics and product requirements, and a dedicated screw should be customized when necessary. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery screw designcompression ratiolength-to-diameter ratiomixing elementscrew matching

Q

Frequent screen change/short screen pack life of heat-resistant polyethylene extruder (Variant: strengthened measures)

A

Frequent screen pack clogging is caused by raw material impurities or improper process, and needs to be solved from raw material management and temperature control. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery screen packimpuritiescarbonized matterbarrel temperaturescreen change frequency

Q

Glossless surface of heat-resistant polyethylene extruded products (Variant: mass production scenario)

A

Surface glosslessness is caused by low die temperature or too fast cooling, and the die temperature needs to be increased and cooling slowed down. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery glosslessnessdie temperaturecooling ratedie polishingmelt temperature

Q

Unstable output/surging in heat-resistant polyethylene extrusion process (Variant: strengthened measures)

A

Unstable output is caused by unstable solids conveying, and the barrel temperature and feeding system need to be optimized. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post unstable outputsurgingsolids conveyinghopper bridgingscrew rotation speed

Q

Dimensional fluctuation of heat-resistant polyethylene extruded products (Variant: strengthened measures)

A

Dimensional fluctuation is caused by unstable extrusion or haul-off, and each process parameter needs to be systematically stabilized. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post dimensional fluctuationscrew rotation speedhaul-off speedtemperature stabilityuniform feeding

Q

Rough inner wall of heat-resistant polyethylene extruded products (Variant: mass production scenario)

A

Inner wall roughness is caused by low mandrel temperature or poor surface condition, and needs to be solved from temperature control and mold maintenance. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery inner wall roughnessmandrel temperaturemandrel polishingmelt temperatureplasticizing quality

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