The filter screen changer blocked by the exchanger will affect the temperature of molten material

When the screen changer blocked filter works to a certain extent, the pressure in the extruder body will increase and the material flow will not be smooth and can not continue to work. At this time, it is necessary to stop the machine and replace the blocked filter. When the blocked filter is replaced manually, the pressure will suddenly drop, and the temperature of molten material may also drop, resulting in changes in the size of the product. In order to maintain the same size of the product, it was originally used to adjust the screw speed of the extruder, or to adjust the linear speed of the extruder. These changes may not cause serious problems in the extrusion of circular products, but in the extrusion of flat or irregular products, the change of molten material temperature may affect the shape and size of products. For example, in a flat die, colder melted materials may make the center of the sheet thinner and the periphery thicker.