Mechanical processing of plastic products uses plastic processing methods such as metals and wood to produce precise or small quantities of plastic products. It can also be used as an auxiliary process for forming, such as sawing extruded profiles. Because the properties of plastics are different from those of metals and wood, the thermal conductivity of plastics is poor, the coefficient of thermal expansion and modulus of elasticity are low. When the clamp or tool is pressed too much, it is easy to cause deformation, melt easily when it is heated and adhere to the tool. Therefore, when plastic is machined, the cutting tools and the corresponding cutting speed should be adapted to the characteristics of plastic. Commonly used mechanical processing methods are sawing, shearing, punching, car, planer, drilling, grinding, polishing, thread processing and so on. In addition, plastics can also be cut, punched and welded by laser.
Joint Plastic Processing for Plastic Products Joint Plastic Parts by Welding and Bonding. Welding methods include hot air welding with electrodes, hot melt welding with hot poles, high frequency welding, friction welding, induction welding, ultrasonic welding, etc. Adhesion method can be divided into flux, resin solution and hot melt adhesives according to the adhesives used.
The purpose of surface modification in the production of plastic products is to beautify the surface of plastic products, which usually includes: mechanical modification, i.e. removing burrs, burrs and size correction by means of filing, grinding and polishing processes; painting, including coating the surface of the parts with paint, brightening the surface with solvent, coating the surface of the products with patterned film, etc; and coloring, including color painting, printing and hot stamping; Metal plating, including vacuum plating, electroplating and electroless silver plating. Plastic processing hot stamping is to transfer the color aluminium foil layer (or other pattern film) on the hot stamping film to the workpiece under heating and pressure. Many household appliances and building products, daily necessities, etc. are used to obtain metal luster or wood pattern.
The methods of bonding, welding and mechanical joining are used in the assembly of plastic products to make the plastic parts assembled into complete products. For example, plastic profiles are assembled into plastic window frames and doors by sawing, welding and drilling.
