During the normal use of the plastic extruder, you must pay attention to whether its tools are in the specified position. Because this type of machine has higher requirements for the use pattern and environment, you must operate according to the regulations, not individualized use, and avoid random operation. In the process, the work efficiency is affected due to improper use, so what points should be paid attention to for a good quality extruder?
1. Ensure that the temperature is normal
Before starting the extruder, check whether the temperature control is sensitive, whether the instrument is malfunctioning, whether the cooling water path is unblocked, etc. Usually use thermometers, cooling water and other methods for testing. Heat the screw, barrel and die head of the extruder according to the operating procedures of the extruder. After the temperature rises to the set temperature, it must be kept warm for a few minutes before it can be turned on, so that the temperature of each part of the machine tends to stabilize.
2, prevent overload
Be sure to tighten the connecting screws and bolts of each part of the die before starting the machine. Before the material is extruded, the operator must not stand in front of the die to prevent the bolts or screws from breaking and causing injury. When the heat-resistant and wear-resistant extruder starts to extrude, the screw speed should be slow, and then gradually increase to prevent overloading and damage to the parts during startup. When the extruder is turned on, add a small amount of material and keep the feeding balance. When feeding, pay close attention to the torque and other table values. After the material is extruded from the die and pulled into the traction equipment, the amount of material can be gradually increased until the normal extrusion Out.
3. Put on the cover plate reasonably
There should be a certain distance between the shaping mold and the die head at the beginning of traction, and the waterway should be opened (note that water should not be poured into the die head, otherwise it will cause the die head to discharge abnormally and cause the material to break or block the mold). For small cavities and one-mold multi-cavity profiles, the cover of the shaping die needs to be opened. After confirming that the extruded material is plasticized normally, the material is pulled to the tractor through the set traction rope. Shorten the distance between the sizing table and the die, cover the cover, start the vacuum pump, and when the extrusion speed and traction speed are basically balanced, observe the profile to be extruded normally, and then shrink the distance between the sizing table and the die to the ideal value.
When you use an extruder, you must pay more attention to its temperature and noise. In principle, this kind of mechanical equipment will not produce unacceptable noise during the working process. If the environmental interference is eliminated, if the machine equipment appears If there is a large amount of vibration, it should be suspected whether the material is not completely removed, and at the same time, it depends on whether each functional area is normal.
Post time: Mar-02-2021