Problem & Solution

Practical answers to common plastic material challenges

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Q

Uneven transverse stretching

A

This problem is a typical manifestation of uneven transverse stretching in calender molding. The core of the solution lies in precise adjustment of roll gap compensation, uniform control of roll temperature distribution, and assurance of feed system stability. It is recommended to start troublesh...

Extrusion & Post curing oventemperature sensorhot air circulationair speed distributionline speed matching

Q

Rough surface / lusterless

A

This problem is a typical manifestation of rough surface / lusterless in calender molding. The core of the solution lies in precise adjustment of roll gap compensation, uniform control of roll temperature distribution, and assurance of feed system stability. It is recommended to start troubleshoo...

Extrusion & Post coating glossmatting agent dispersioncuring degreesubstrate roughnessleveling time

Q

Fish eyes / gel particles

A

The essence of gel particles (fish eyes) is ultra-high molecular weight components or cross-linked gels in the resin that are not completely melted. The solution approach is "heat up + filter + change material": increase plastication temperature to ensure full melting, use screens to filter gel p...

Extrusion & Post gel particles fish eyeshigh molecular weight componentsplastication temperaturescreen filtrationresin purity

Q

Surface water marks / cold spots

A

This problem is a typical manifestation of surface water marks / cold spots in calender molding. The core of the solution lies in precise adjustment of roll gap compensation, uniform control of roll temperature distribution, and assurance of feed system stability. It is recommended to start troub...

Extrusion & Post surface water marksroll temperature too lowfeed temperaturebank renewalcalendering speed

Q

Uneven film thickness / transverse thickness variation

A

The essence of transverse thickness unevenness of calendered film is uneven distribution of roll gap along the axial direction. The core of the solution is "precise compensation": compensate roll deflection through precise adjustment of crown and cross angle, combined with real-time feedback fine...

Extrusion & Post transverse thickness variationcrown compensationcross angleroll gap uniformityonline thickness measurement

Q

Extruded pipe surface sink marks

A

This problem is a typical manifestation of extruded pipe surface sink marks 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 pipe wall thicknessdie concentricitysizing sleeve centeringvacuum sizingonline thickness measurement

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

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