Problem & Solution

Practical answers to common plastic material challenges

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Poor plastication

The essence of poor plastication is insufficient temperature or inadequate mixing time preventing the resin from fully melting. The core of the solution is "heat up + extend time + adjust formulation": increase feed temperature and banburying time, select resin powder with smaller particle size t...

Extrusion & Post poor plasticationfeed temperaturemixing timeplasticizer dosageresin particle size

Color difference / discoloration

This problem is a typical manifestation of color difference / discoloration 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 spinning color differencemasterbatch meteringtemperature fluctuationchip batchcolorant stability

Uneven shrinkage rate

This problem is a typical manifestation of uneven shrinkage rate 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 troubleshooting ...

Extrusion & Post uneven shrinkage ratespeed ratio orientationcooling uniformityheat setting temperatureincoming material shrinkage rate

Poor cooling and setting

This problem is a typical manifestation of poor cooling and setting 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 troubleshooti...

Extrusion & Post poor cooling and settingcooling roll temperaturecalendering speedcooling medium flowscale cleaning

Calendering wrinkles

The essence of wrinkles is inconsistent speeds of various parts of the film surface passing through the roll nip or asymmetric tension distribution. The core of the solution is to ensure uniform roll gap and stable tension control — adjust the roll gap to eliminate local speed differences and opt...

Extrusion & Post winding tensiontaper controlroll diameter compensationspeed synchronizationtension setting

Roll surface wear / damage

This problem is a typical manifestation of roll surface wear / damage 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 roll surface wearhard impuritiesnatural wearroll surface protectionmetal detection

Roll sticking / roll wrapping

The essence of roll sticking is that the adhesion force between melt and roll surface exceeds the separation force required for normal stripping. The solution approach is "cool down + adjust angle + add additives": reduce that roll's temperature to reduce adhesion force, adjust the stripping angl...

Extrusion & Post roll sticking and wrappingroll temperature too highstripping anglelubricantroll surface coating

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

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