Method for producing plastic product
The joining of plastic products; the joining of plastic parts by plastic processing; welding and bonding. Welding is the use of hot welding electrode welding, hot welding using hot welding, and high-frequency welding, friction welding, induction welding, ultrasonic welding, etc.. Bonding method can be divided into flux, resin solution and hot melt adhesive according to the adhesive used. The surface modification of the production of plastic products to beautify the surface of plastic products, usually including: mechanical modification, namely with filing, grinding and polishing process, the removal of parts on edges, burrs, and fixed size; finishing, including coating surface parts, the use of a solvent to surface brightening, covered with the surface of products etc. pattern film; colour, including painting, printing and printing; metal plating, including vacuum coating, electroplating and chemical plating method etc.. Plastic processing is hot stamping, heating, compression, the film on the hot stamping aluminum foil (or other pattern film) transferred to the workpiece. Many household appliances and building products, daily necessities and so on use this method to obtain the metal luster or the wood grain and so on the pattern. The assembly, bonding, welding, and mechanical joining of plastic products for the manufacture of finished plastic parts into complete products. For example: plastic profiles, through sawing, cutting, welding, drilling and other steps, assembled into plastic window frames and plastic doors.
The plastic processing method can be used for rubber processing. In addition, there are liquid monomers or polymers as raw materials such as casting. In these methods, extrusion and injection molding are the most widely used and the most basic molding methods. The mechanical processing of plastic products borrows plastic processing methods such as metal and wood, and makes plastic products of very accurate size or small quantity, and can also be used as the auxiliary process of forming, such as the sawing of extrusion sections. Because the plastic properties and different thermal conductivity of metal and wood, plastics, thermal expansion coefficient, low elastic modulus, when the fixture or tool pressure is too large, easy to cause deformation, cutting heat melting, and easy adhesion on the cutter. Therefore, the plastic processing, the tools used and the corresponding cutting speed, etc., should be adapted to plastic characteristics. The commonly used mechanical processing methods are sawing, cutting, punching, driving, planing, drilling, grinding, polishing, thread processing and so on. In addition, the plastic can also be used laser cutting, punching and welding.
Plastic products generally include plastic batching, molding, machining, bonding, finishing and assembly. The latter four processes are carried out after the plastic has been molded into products or semi-finished products. It is also called plastic two times processing. Key links in plastic processing of plastic products. The various forms of plastic (powder, granular, solution or dispersion) made products or blank of desired shape. As many as 30 kinds of molding method. Its choice is mainly determined by the type of plastic (thermoplastic or thermosetting), the starting form, and the shape and size of the product. Plastic processing thermoplastics commonly used methods are extrusion, injection molding, calendering, blow molding and thermoforming, etc., plastics processing thermosetting plastics generally use molding, transfer molding, injection molding. Lamination, molding and thermoforming are the processes of forming plastics on a flat surface.
