Among all kinds of plastic machinery, the core is the plastic extruder, which has become one of the widely used models in the plastic processing industry. Plastic extruder is composed of extrusion system, transmission system and heating and cooling system. According to the number of screws, it can be divided into single screw extruder, twin screw extruder and multi-screw extruder. From the use of the extruder to the present, the extruder has developed rapidly and has gradually formed a track in line with its own development.
At present, the single screw extruder is widely used and suitable for the extrusion processing of general materials. Plastic filament extrudering machine belongs to single screw extruder.
The plastic extruder has the advantages of high efficiency and high output, which can enable investors to obtain a larger output and a high return with a relatively low investment. However, the accuracy of auxiliary devices and control systems must be improved, and the screw and barrel wear Intensifying the need to use high wear-resistant and ultra-high wear-resistant materials, reducers and bearings increase their life when they are mature and high-speed running.
Plastic extruder should pay attention to the following matters:
1. The diameter of the barrel increases due to wear. If there is a certain nitriding layer, the inner hole of the barrel can be directly bored and ground to obtain a new diameter size, and then a new screw can be prepared according to the new diameter.
2. Through machining, the inner diameter of the barrel is trimmed and the alloy is recast, the thickness is controlled between 1 and 2mm, and then it is finished to the necessary new size.
3. Under normal circumstances, the homogenization section of the barrel wears faster than other positions. The homogenization section can be bored and trimmed and equipped with a nitrided alloy steel bushing. The diameter of the inner hole refers to the diameter of the screw, leaving the normal matching gap for processing. Preparation.
4. Materials for screw and barrel manufacturing
Plastic extruder is a kind of mechanical equipment that can achieve high-efficiency and continuous extrusion to produce plastic products. Its core part is the screw. The “locking” phenomenon of the screw is a very serious equipment failure. If in the actual production process, it will not only interrupt the production process and affect the quality and output of the product, but also cause irreversible equipment damage to the extruder equipment.
Post time: Feb-23-2021