Problem & Solution

Q

Unreasonable die head flow channel design of heat-resistant polyethylene extruder (Variant: mass production scenario)

A

Die head flow channel design needs to ensure uniform melt distribution and no material stagnation, and the die head should be redesigned when necessary. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery die head flow channeluniform flow velocitysizing sectionflow channel dead cornertemperature uniformity

Q

Mechanical properties of heat-resistant polyethylene extruded products not meeting standard (Variant: mass production scenario)

A

Failure of mechanical properties to meet standards is caused by material degradation or poor processing quality, and needs to be solved from temperature control and plasticizing quality. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery mechanical propertiesmaterial degradationplasticizing qualitycrystallinityregrind ratio

Q

Excessive gel/gel particles in heat-resistant polyethylene extruded products (Variant: mass production scenario)

A

Gel is caused by insufficient plasticization or raw material quality problems, and needs to be solved from temperature control, screw design and raw material selection. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery gelgel particleplasticizing temperaturescrew mixingscreen pack mesh

Q

Bending deformation of heat-resistant polyethylene extruded pipes (Variant: mass production scenario)

A

Pipe bending is caused by non-uniform cooling or haul-off eccentricity, and needs to be solved from cooling uniformity and equipment alignment. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post pipe bendinguneven coolinghaul-off alignmentuniform wall thicknessstraightness

Q

Decreased cooling system efficiency of heat-resistant polyethylene extruder (Variant: strengthened measures)

A

Decreased cooling efficiency is caused by insufficient water volume or too high water temperature, and the cooling system needs to be improved and water temperature controlled. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery cooling efficiencycooling water flowcooling water temperaturewater circuit scalingcooling water tank

Q

Sizing device failure of heat-resistant polyethylene extruder (Variant: strengthened measures)

A

Sizing device failure needs to be solved from the three aspects of vacuum system, cooling system and mold accuracy. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery sizing devicevacuum degreesizing sleeve wearcooling watermold concentricity

Q

Unreasonable die head flow channel design of heat-resistant polyethylene extruder (Variant: strengthened measures)

A

Die head flow channel design needs to ensure uniform melt distribution and no material stagnation, and the die head should be redesigned when necessary. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery die head flow channeluniform flow velocitysizing sectionflow channel dead cornertemperature uniformity

Q

Heat-resistant polyethylene pipe ovality exceeding standard (Variant: strengthened measures)

A

Excessive ovality is caused by uneven cooling or external force deformation, and needs to be solved from cooling uniformity and pipe storage. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post ovalityuniform coolingsizing sleevehaul-off clampingpipe storage

Q

Die marks/lines appear on heat-resistant polyethylene extruded products (Variant: mass production scenario)

A

Die marks are caused by die inner wall damage or impurities, and the die condition needs to be regularly cleaned and inspected. Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post die markdie scratchimpurity cleaningflow channel designscreen pack

Q

Mechanical properties of heat-resistant polyethylene extruded products not meeting standard (Variant: strengthened measures)

A

Failure of mechanical properties to meet standards is caused by material degradation or poor processing quality, and needs to be solved from temperature control and plasticizing quality. Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery mechanical propertiesmaterial degradationplasticizing qualitycrystallinityregrind ratio

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