Process step introduction of plastic products


General plastic products including plastic ingredients, molding, machining, joining, modification and assembly. After four step is after the plastic has been formed into a semi-finished article or carried, also known as secondary plastic processing.
Key aspects of the production of plastic molding plastics processing. The various forms of plastic (powder, pellet, solution or dispersion), or products made from the blank of the desired shape. Method of forming up to 30 species. It mainly depends on the choice of the type of plastic (thermoplastic or thermoset), and the initial shape of the shape and size of products. Plastics processing thermoplastics commonly used methods are extrusion, injection molding, calendaring, blow molding and thermoforming, thermosetting plastics commonly used plastics processing molding, transfer molding, and injection molding. Laminating, molding and thermoforming plastic is molded on the plane. Plastic processing method described above, it can be used for rubber processing. In addition, in the liquid monomer or polymer casting material and the like. In these methods, extrusion and injection molding with the most, it is the most basic molding method.
Machining plastic products have borrowed metal and wood plastic processing methods, manufacturing dimensions or a small number of very precise plastic products, but also as an auxiliary molding processes, such as extrusion sawing profiles. Because the performance of plastics and different metals and wood, plastic, poor thermal conductivity, thermal expansion coefficient, low elastic modulus, when the jig or tool pressure is too large, easy to cause deformation, cutting heat to melt easily, and easy to adhere to the tool on. Therefore, plastic machining, the tool with the appropriate cutting speed would have to adapt to the characteristics of plastics. Conventional machining methods are sawing, shearing, punching, car, plane, drilling, grinding, polishing, thread processing. In addition, the plastic can also be laser cut off, drilling and welding.
The method of bonding plastic products plastic processing the plastic parts are joined together welding and bonding. Welding method using hot air welding electrodes, the use of extreme heat of fusion welding, and high-frequency welding, friction welding, induction welding, ultrasonic welding or the like. Bonding method may be used in adhesives, divided into flux, resin solution and hot melt adhesive bonding.
Surface modification of plastic products aimed at beautifying the plastic surface, typically include: mechanical modifications, namely by filing, grinding, polishing and other processes to remove the parts burrs, size, etc. and amendments; finishes, including paint coating system surface, surface brightening with a solvent, with a film with a pattern of affixing article surface; applying color, including painting, printing and stamping; metallization, including vacuum coating, electroplating and chemical silver and so on. Plastic processing stamping is heated under pressure, the aluminum foil stamping film color layer (or other pattern layer) is transferred to the article. Many household appliances and construction products, daily necessities, etc., this method to obtain metallic luster or wood and other patterns.
Assembly of plastic products with bonding, welding and mechanical connections and other methods to make plastic parts are assembled into complete products made job. For example: plastic profiles, step after sawing, welding, drilling and other plastic window frames and assembled into plastic doors.

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