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Plastics production methods

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Plastics production methods

Release date:2015-05-13 00:00 Source:http://www. Click:

Plastic products typically include plastics 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 plastic secondary processing.

The key aspects of the production of plastic molding plastic processing. The various forms of plastic (powder, pellets, solution or dispersion) is made articles or blanks of desired shape. The method of forming up to 30 species. It is mainly determined by the choice of the type of plastic (thermoplastic or thermoset) starting shape and shape and size of the article. Plastics processing thermoplastics commonly used methods are extrusion, injection molding, calendering, blow molding and thermoforming, thermosetting plastics commonly used plastics processing molding, transfer molding, and injection molding. Laminating, molding and thermoforming are molded plastic in the plane. Plastic processing method described above, it can be used in rubber processing. In addition, in the liquid monomer or polymer is a casting material or the like. In these methods, extrusion and injection molding with the most, it is the most basic molding methods.

Machining plastic products production of metal and wood borrowed 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, easy to melt when cutting heat, and easy to adhere to the tool on. Therefore, plastic machining, the use of knives and cutting speed would have to adapt the corresponding plastic characteristics. Conventional machining methods saws, scissors, Chong, 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 production of plastic processing the plastic parts are joined together welding and bonding. Electrode welding method is to use hot air welding, thermal fusion welding electrode, and high-frequency welding, friction welding, induction welding, ultrasonic welding. Bonding method can be used in adhesives, 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 with filing, grinding, polishing and other processes, removing the parts burrs, and amendments size, etc; finishes, including paint coating system surface, surface brightening with a solvent, with a paste with a pattern of thin-film coating products, surface; applying color, including painting, printing and stamping; metallization, including vacuum coating, electroplating and chemical silver plating and so on. Plastic processing stamping is heated under pressure, the stamping foil layer color film (or other pattern layer) was transferred to the article. Many household appliances and construction products, daily necessities, etc., this method to obtain metallic or wood grain 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 of a job. For example: plastic profiles, through step sawing, welding and drilling assembly into a plastic window frames and plastic doors.




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