Plastic products production generally includes plastic ingredients, molding, mechanical processing, joint, modification and assembly, etc. After four working procedure is in the plastic molded products or semi-product, also known as the plastic secondary processing.
Molding of plastic products production The key link of plastic processing. Will be in the form of various plastic (powder, granular materials, solution or dispersion) made from the shape of the products or parts is required. As many as 30 kinds of forming methods. It mainly depends on the choice of the type of plastic (thermoplastic or thermosetting), starting form and shape and size of products. Commonly used methods for plastics processing thermoplastic extrusion, injection molding, calendering, blow molding and thermoforming, plastic processing commonly used thermosetting plastic molding, transfer molding, injection molding are also employed. Laminating, molding and thermoforming is made of plastic forming on the plane. The plastic processing method, all can be used in rubber processing. In addition, there is in a liquid monomers or polymers as raw materials of casting, etc. In these methods, in order to extrusion and injection molding used most frequently, is also the most basic method of forming.
Plastic products production of mechanical processing Use metal and wood plastic processing methods, such as manufacturing size is very precise or small number of plastic products, can also be used as an aid in the process of forming, such as extrusion profiles of sawing. Due to the performance of the plastic and metal and wood, plastic, poor thermal conductivity, thermal expansion coefficient, low modulus of elasticity, when the jig or tool pressure is too big, easy to cause deformation, cutting heat is easy to melt, and easy adhesion on the cutting tool. As a result, the plastic mechanical processing, the cutting tool and the corresponding cutting speed must adapt to the characteristics of plastic, etc. Common machining methods are sawing, cutting, punching, cars, planing, drilling, grinding, polishing, screw thread processing, etc. In addition, the plastic also can use laser cutting, punching, and welding.
The joint of plastic products production Plastic processing methods of the plastic joint up welding and adhesive. Welding is the use of hot air welding electrode, using hot very hot melt welding, as well as the high frequency welding, friction welding, induction welding, ultrasonic welding, etc. Bonding method can be used in adhesives, divided into the solvent, resin solution and hot melt adhesive.
The surface modification of plastic products production Purpose is to beautify the plastic products surface, usually include: mechanical modification, file, grinding and polishing process, remove burrs on the parts, burrs, and the correct size, etc.; Finishing, including coating coated on the surface of parts, solvent increase surface bright, with decorative pattern film on the surface of the products; ShiCai, including painting, printing and hot stamping; Metallized, including vacuum coating, electroplating and chemical plating silver, etc. Plastic processing hot stamping is under the heat, pressure, hot stamping film on the color of the aluminum foil layer (or other decorative pattern membrane layer) transferred to the parts. Many household appliances and building products, daily necessities, etc., used this method to obtain metallic luster or wood grain pattern.
Plastic products production of the assembly With bonding, welding and mechanical connection method, make plastic parts assembled into complete products made of homework. For example: plastic material, after cutting, welding, drilling, steps such as assemble into plastic window frames and plastic door.
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