Problem & Solution

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded products excessive gel/gel particles（Variant: Mass Production Scenario）

A

Gels are caused by insufficient plasticization or raw material quality problems, and need 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 particlesplasticizing temperaturescrew mixingfilter screen mesh count

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded pipe bending deformation（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 alignmentwall thickness uniformitystraightness

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruder cooling system efficiency decline（Variant: Strengthened Measures）

A

The decline in cooling efficiency is caused by insufficient water volume or excessive water temperature, requiring improvement of the cooling system and control of water temperature.Targeted preventive measures need to be taken in different production scenarios.

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

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruder sizing device failure（Variant: Strengthened Measures）

A

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

Processing Machinery sizing devicevacuum degreesizing sleeve wearcooling watermold concentricity

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruder die head runner design unreasonable（Variant: Strengthened Measures）

A

The die head runner design needs to ensure uniform melt distribution and no stagnant material; if necessary, redesign the die head.Targeted preventive measures need to be taken in different production scenarios.

Molds & Tooling die head runneruniform flow velocityland sectionrunner dead cornertemperature uniformity

Q

Random copolymer polypropylene pipe special material (Nordic standard） 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

Random copolymer polypropylene pipe special material (Nordic standard） extruded products die lines/lines（Variant: Mass Production Scenario）

A

Die lines are caused by die inner wall damage or impurities, requiring regular cleaning and inspection of the die condition.Targeted preventive measures need to be taken in different production scenarios.

Extrusion & Post die linesdie scratchesimpurity cleaningrunner designfilter screen

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded products mechanical properties substandard（Variant: Strengthened Measures）

A

Substandard mechanical properties are caused by material degradation or poor processing quality, and need to be solved from temperature control and plasticization quality.Targeted preventive measures need to be taken in different production scenarios.

Processing Machinery mechanical propertiesmaterial degradationplasticization qualitycrystallinityregrind ratio

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded products excessive gel/gel particles（Variant: Strengthened Measures）

A

Gels are caused by insufficient plasticization or raw material quality problems, and need 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 particlesplasticizing temperaturescrew mixingfilter screen mesh count

Q

Random copolymer polypropylene pipe special material (Nordic standard） extruded pipe bending deformation（Variant: Strengthened Measures）

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 alignmentwall thickness uniformitystraightness

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