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Roll speed mismatch / improper speed ratio

This problem is a typical manifestation of roll speed mismatch / improper speed ratio 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 s...

Extrusion & Post haul-off slippingrubber wearclamping pressurefriction coefficientproduct surface water and oil

Uneven roll temperature

This problem is a typical manifestation of uneven roll temperature 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 troubleshootin...

Extrusion & Post uneven roll temperatureheat transfer oil channelroll end heat dissipationinfrared temperature measurementtemperature control deviation

Longitudinal thickness fluctuation

This problem is a typical manifestation of longitudinal thickness fluctuation 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 tro...

Extrusion & Post winding tensiontaper controlroll diameter compensationspeed synchronizationtension setting

Uneven transverse stretching

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

Rough surface / lusterless

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

Fish eyes / gel particles

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

Bubbles / pinholes

The three major causes of extrusion bubbles (raw material moisture, gas from thermal decomposition, air entrainment by the screw) must be treated differently: moisture type — fully dry to the specified moisture content; decomposition type — reduce processing temperature to avoid degradation; air ...

Material Drying extrusion bubblesraw '2079851475616104451melt degradationvent vacuumscrew compression ratio

Surface water marks / cold spots

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

Uneven film thickness / transverse thickness variation

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

Extruded pipe surface sink marks

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

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