In order to operate the machine correctly, the operator must understand the extrusion process as well as the extruder. It is important to specify how to operate the screw, how to control the heating and cooling, but also to understand the characteristics of the instrumentation, the structure of the control dies of the haul-off and how the material is assembled.
Before formal operation, we have to debug the extruder. First, we have to check the sensitivity of the temperature control, the correctness of the instrumentation, the smoothness of the cooling water line, etc.. These problems can be tested with a thermometer, through the cooling water and other methods. After checking these, before starting. Then, we have to operate the machine strictly according to the machine's operation specification. First, we have to heat the screw, barrel and die, when the temperature just reaches the setting, don't rush to open it. We must wait for another ten minutes to let the temperature of the machine stabilize before we can turn on the machine. Note that before turning on the machine, the screws and bolts in the die head section must be tightened while it is still hot. For the safety of the operator, the staff must not stand in front of the die opening before the material is extruded. At the beginning of extrusion, in order to prevent the machine from being damaged by starting too fast, the operator should control the rotational speed of the screw, first slowly, and then gradually accelerate. When starting the machine, the operator should control the amount of material to be added. Start to add only a small amount of material, and then add material at an even speed. At the same time, also pay attention to observe the meter data, until the material is extruded to the traction equipment, to be the material from the die head mouth mold extrusion and hauling on the traction equipment, and then increase the amount of material.
If you encounter blockage, the operator should move back the shaping table or increase the traction speed to restore normal production. If it is not effective, the shaping table should be moved back immediately, shoveling off the material, shutting off the water and air in the shaping die, and at the same time reducing the haul-off speed, and then pulling out the extruded material slowly. When stopping the machine, the operator should wait for the material in the machine to be drained before stopping the machine, and at the same time, the die head should be disassembled while it is still hot to clear the die for processing.
