Problema y solución

Respuestas prácticas a los desafíos comunes de los materiales plásticos

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Bending deformation of general-purpose polyethylene extruded pipes

Pipe bending is caused by non-uniform cooling or eccentric haul-off, and needs to be solved from cooling uniformity and equipment alignment.

Extrusion & Post pipe bending uneven cooling haul-off alignment uniform wall thickness straightness

General-purpose polyethylene pipe pressure test failed

Pressure test failure is caused by insufficient wall thickness, material degradation, or internal defects, and needs to be systematically solved from process and material quality.

Processing Machinery pressure test pipe wall thickness material degradation crystallinity plasticization quality

Die marks/lines on general-purpose polyethylene extruded products

Die marks are caused by die inner wall damage or impurities, and the die condition needs to be cleaned and checked regularly.

Extrusion & Post die mark die scratch impurity cleaning flow channel design filter screen

Insufficient equipment maintenance during processing of general-purpose polyethylene general-purpose polyethylene

Equipment maintenance is the basis of stable production, and a standardized regular maintenance system and record system need to be established.

Molds & Tooling equipment maintenance preventive maintenance screw clearance mold maintenance sensor calibration

Large current fluctuation of general-purpose polyethylene extruder

Current fluctuation is caused by large plasticizing resistance or equipment problems, and needs to be solved from temperature control, raw material purity, and equipment maintenance.

Processing Machinery current fluctuation screw torque plasticizing temperature raw material impurities filter screen blockage

Poor plasticization caused by screw wear of general-purpose polyethylene extruder

Screw wear leads to a decrease in plasticizing efficiency, and needs to be solved by selecting wear-resistant materials and regular maintenance.

Processing Machinery screw wear poor plasticization wear-resistant material screw clearance screw speed

Large barrel temperature fluctuation during processing of general-purpose polyethylene general-purpose polyethylene

Barrel temperature fluctuation is caused by heating or temperature control system faults, and the heater bands, thermocouples, and temperature controllers need to be regularly checked and maintained.

Processing Machinery temperature fluctuation heater band thermocouple temperature controller PID parameters

Process connection problems when switching production between different processing methods of general-purpose polyethylene general-purpose polyethylene

The changeover connection needs to be planned in advance and fully prepared, and the key is to clarify the differentiated requirements of different processing methods for materials.

Extrusion & Post production changeover processing method process parameters material grade trial production verification

Blow-out/blow-crack of general-purpose polyethylene blow molded products

Blow-out is caused by excessive blowing air pressure or poor parison quality, and the blowing process and parison quality need to be optimized.

Blow Molding blow-out blowing air pressure parison wall thickness extrusion temperature staged blowing

Severe parison sag of general-purpose polyethylene '2079851475616104457

Parison sag is caused by low melt strength or slow extrusion, and needs to be solved by lowering the temperature, increasing the speed, and selecting materials.

Blow Molding parison sag melt strength extrusion temperature extrusion speed MFR

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