Extrusion Production Precautions The preparation of the extruder before driving:
1, for the production of plastic extrusion should meet the required drying requirements, if necessary, need further drying.
2, start running equipment, the speed from slow to fast, check the operation is normal and observe the working status of the instrument.
3, open the heater, the machine head heating temperature, to be the temperature of the various parts to set the required value, should be about 40 minutes, so that the temperature inside and outside the same machine.
4, and sometimes need to change the multi-hole plate, filter, add enough oil, porous plate after use must be clean to the secondary use.
When the extruder is driving:
1, before the plastic is not squeezed out, no one should be in front of the mold.
2, to start low-speed drive, idle, check the screw with or without abnormal current and other instruments with or without overload phenomenon, the pressure gauge is normal (machine idle time can not be too long, the shorter the better, to prevent friction between the screw and screw Barrel friction, scratch barrel or screw, screw low-speed operation time should not exceed three minutes)
3, gradually a small amount of feeding, until the plastic extrusion die, the screw speed to reach the normal operation speed before a large number of feeding.
4, plastic extrusion, the need to slowly lead to the cooling and traction equipment, and in advance to open these devices,
Note: Do not drive cold or open the cold car, because the extruder was not "hot through" (that is, the extruder barrel plastic has not yet fully meet the required temperature, plastic melt viscosity is high), then Driving, especially the old extruder, it is possible to break the screw. The new extruder is generally equipped with torque overload protection device, a reliable and most effective way is not before driving, when the temperature rose to the required temperature value, the hand rotation part of the coupling, the left three laps, Right three laps, smooth rotation, you can boot. If you can not turn smoothly, just can not boot.