Generally speaking, the extrusion capacity of rubber extruder has two concepts, one is the actual extrusion capacity and the other is the theoretical extrusion capacity. The calculation method of the theoretical extrusion volume is: calculated by the screw geometry (cross-sectional area of ​​the internal space of the barrel-cross-sectional area of ​​the screw = cross-sectional area of ​​the runner) and then multiplied by the lead of the large-lead screw element in the feeding section. With the main engine speed, all using international standard units, the obtained m3/h is the theoretical limit extrusion volume at this speed. The actual extruder calculation volume does not need to be calculated. Generally, the actual extrusion volume is measured according to the actual feeding amount. Usually, the actual amount of extrusion is as much as the amount of material fed within the theoretical range. The extrusion capacity of the extruder equipment is a very important value in actual production, because it depends on the extrusion capacity of the equipment to actually calculate what size product to use for extrusion production. Some large products use Small extruders can't meet the requirements of product extrusion molding. There is no pressure on the machine head when the equipment is extruded. Therefore, we must combine the theoretical extrusion volume to determine how much equipment is required for the product to optimize the metering production.