How are plastic products formed?
The molding process of plastic products, is not only to obtain the desired product, but also improve the plastic properties for thermoplastic and thermosetting plastics, its forming method is not the same, there are several forming methods commonly used.
5 、 blow molding, blow molding, used in thermoplastics. This is the molten plastic in the mold, under the compressed air pressure, the plastic blow up, close to the mold surface. It is produced by punching and demoulding. It also produces many kinds of hollow packing containers, and also produces films, sheets and so on6. Heating, molding, heating and molding thermoplastic plastics. This is the plastic sheet heating into an elastic state, and then put pressure on the mold attached to the mold. Production of dishware, disc type products.7, foaming molding, foaming molding, the plastic will be added foaming agent, so that foaming, then foam into the mold, curing molding for products. The utility model is used for making cushioning packages for precise instruments and meters.8, molding molding for thermosetting plastics. This is a powder, flake or granular thermosetting resins and additives, placed directly in the mold cavity, the mold closing, heating, pressurizing, plastic and liquefaction, chemical reaction and curing, cooling after the products. Multiple production of sheet and electrical appliances, mechanical parts9, casting molding casting molding for jade. The thermosetting plastic molding powder is placed in the material barrel heating to heat plasticizing, pressed into the mold, and the product complete solidification under pressure. Complex products production needs to block metal objects.10, casting molding for solid thermal plastic. It will plasticized thermosetting plastic injection mould, curing under normal pressure, cooling and demoulding to obtain the products. The production of electronic, electrical and metal insert element.
1, calendering calendering for thermoplastics. It is through Plasticating plastic, sent to several groups of parallel arrangement, reverse rotation of the heat roller, by repeatedly calendering products. Production of film or sheet.2, casting casting with dry plastic. It is soluble in the solvent of plastic, due to weight andspread to continuous operation of the metal belt, become thin layer of uniform thickness, then heating apparatus soft volatile agent, curing products, production of film or sheet.3 、 extrusion molding, extrusion molding, used in thermoplastics. This is a melt plasticized plastic which is extruded from the die cavity of the die at the head of the extruder and forms a profile similar to that of the die. It produces plates, pipes, bars, wires, profiles and so on
