Plastic is a material that can be molded with synthetic resin as the main component at a certain temperature and pressure, and it is usually made of petroleum, coal, calcium carbide or natural gas and agricultural and sideline products as the main raw materials. With the development of plastic materials and the progress of molding and processing technology, the application range of plastic products is expanding day by day. Plastics can be used to make mechanical parts in various machines and components in production and life, as well as various appliances, with a wide variety of applications and applications.
The cutting process of plastic is the process of making the tool remove the excess plastic layer from the workpiece through the cutting motion, forming chips and machined surfaces. The formation process of plastic chips is extruded by cutting tools, and the deformation of the workpiece material obeys Hooke's law. Therefore, the cutting process of plastic is an extrusion process. The better the cutting performance, the larger the range of continuous cutting, the smaller the surface roughness value, and the higher the accuracy; The smaller the unit cutting force, the smaller the cutting heat and the longer the tool life.
The processed surface quality of plastics is an important aspect of the performance of plastic products. The so-called processed surface quality refers to the surface layer state of plastic parts after processing, which cannot be an ideal smooth surface, and there is always a certain microgeometric deviation. The surface material is affected by cutting force and cutting heat during processing, which will also change the original physical and mechanical properties. In order to process plastic workpieces with high surface quality, factors such as the shape of the chip, the shape of the tool, the cutting conditions, the mechanical properties of the plastic, the change of temperature and the thermal properties of the plastic must be considered, and they all play a very important role in processing.