guangxi tide cable news: causes extrusion drawing longitudinal uneven thickness of the film-非凡电子娱乐

resin plasticizing defect,

it is possible that the temperature of each heating zone is not suitable:

thermostat failure,

resin mixed with other melt index of different or greater density of resin:

low back pressure of extruder.

under microscope (40 times) the point of melting,

extrusion film dark, opaque,

viscous flow instability, resulting in fluctuations in the film.

it is concluded that the most effective way to determine the failure of plasticization is to examine if there is no melt under the microscope.

fault handling time,

first of all, it is necessary to exclude the resin mixed with other resins,

after comparing with the standard index.

then consider adjusting the temperature of each heating zone, check the temperature controller.

if the thermostat is found to have been heated to a given temperature,

can reduce the screw speed to achieve the purpose of good plasticization.

appropriate increase in extruder pressure can increase the screen mesh sheet to achieve,

but too high back pressure will cause the screw thrust bearing.

for field temperature control,

raw material, flow rate to achieve stable film,

and low production capacity,

consider changing the screw design,

replace high efficiency screw.