How can plastics be produced? In several ways?
Injection molding is also called injection molding. Injection molding is the use of injection molding machines (or injection machines) to inject thermoplastic melts at high pressure into the mold and to cool and cure the products. Injection molding can also be used for moulding thermosetting plastics and foams. Injection molding has the advantages of fast production, high efficiency, automatic operation, and complicated shape. It is especially suitable for mass production. The disadvantage is that the equipment and mold cost is high, the injection molding machine cleaning more difficult.
Extrusion, also known as extrusion molding, is the use of extruders (extruders) to heat the resin continuously through the mold extrusion of the desired shape of the product. Extrusion is sometimes also used in the forming of thermosetting plastics and can be used in the moulding of foamed plastics. The advantage of extrusion is that it can extrude various shapes of products. The production efficiency is high, it can be automated and continuous production. The disadvantage is that thermosetting plastics can not be widely used in this process, and the size of products is prone to deviation.
Press molding is also known as molding or pressing, and molding is mainly used for molding thermosetting resins such as phenolic resin, urea formaldehyde resin and unsaturated polyester resin.
When the material is heated to a certain temperature by a suction machine, a negative pressure is generated by the vacuum pump to adsorb the plastic sheet onto the surface of the model, and then is cooled and shaped into a bubble or bubble shell of different shapes.
Plastic molding is the process of making final plastics from polymers made from synthetic resin manufacturing plants. Processing methods (often referred to as plastic primary processing) include compression molding (extrusion molding), extrusion (extrusion), injection molding (injection molding), blow molding (hollow forming), calendering, etc..
