CNC Plastic Machining generally includes plastics, molding, machining, joining, finishing and assembly.
CNC Plastic Machining steps:
Raw materials used in plastic processing, in addition to polymers, generally add various plastic additives (such as stabilizers, plasticizers, colorants, lubricants, reinforcing agents and fillers) to improve the molding process and the use of products. Performance or reduce the cost of the product. The additive is mixed with the polymer and uniformly dispersed into a powder (dry blend). Sometimes the powder needs to be processed into pellets by plastication. The powders and pellets are collectively referred to as batching materials or molding compounds.
Plastic molding is a key part of plastic processing. It is necessary to make various forms of plastic (powder, pellets, solution or dispersion) into products or blanks of the desired shape. Its choice is mainly determined by the type of plastic (thermoplastic/thermosetting), the starting form, and the shape and size of the product. Commonly used methods for processing thermoplastics include extrusion, injection molding, calendering, blow molding, and thermoforming. The thermosetting plastics are generally molded, transferred, and injection molded. Lamination, molding, and thermoforming are the shaping of plastic on a flat surface.
3、 plastic joint
The method of joining the plastic parts is welding and bonding. The welding method is hot-melt welding using hot poles, as well as high-frequency welding, friction welding, induction welding, ultrasonic welding, and the like. The bonding method can be divided into a flux, a resin solution and a hot melt adhesive according to the adhesive used.
4、 plastic parts assembly
The assembly of the finished plastic parts into a complete product by bonding, welding, and mechanical joining. For example: plastic profiles are assembled into plastic window frames and plastic doors through steps such as sawing, welding and drilling.
Plastic products with very precise or small quantities can be manufactured by processing methods such as metal and wood, and can also be used as an auxiliary process for forming, such as sawing of extruded profiles. Because the properties of plastic are different from those of metal and wood, the thermal conductivity of plastic is poor, the coefficient of thermal expansion and the modulus of elasticity are low. When the clamp or tool is too pressurized, it is easy to cause deformation, it is easily melted by heat during cutting, and it is easy to adhere to the tool. on. Therefore, when the plastic is machined, the tools used and the corresponding cutting speeds must be adapted to the plastic characteristics. Commonly used machining methods include sawing, shearing, punching, turning, planing, drilling, grinding, polishing, and threading.
6、 surface modification
Surface modification usually includes: mechanical modification, that is, using enamel, grinding, polishing, etc., removing burrs, burrs, and size corrections on the part; finishing, including coating the surface of the part with a coating, and brightening the surface with a solvent, Patterned film covering the surface of the product; color, including painting, printing and hot stamping; metal plating, including vacuum coating, electroplating and chemical silver plating. The hot stamping is to transfer the colored aluminum foil layer (or other film layer) on the hot stamping film to the workpiece under heating and pressure. Many household appliances and construction products, daily necessities, etc.
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