After the Dalian extrusion moulding fills the die cavity, the work is suspended, the plastic is shaped into a certain shape by cooling, and then it works again after opening the die。 For example, plastic cups, plastic basins, plastic shells in various complex situations and so on。 He has a certain limit on the amount of injection per cycle。 After melting, the plastic particles are injected into the closed cavity, cooled, and the product is removed by opening the mould。 The extrusion die is very simple, that is, the die sleeve core die, similar to two rings together。
Extrude the shape of the tube and then harden it by cooling in the sink. Injection and extrusion, characterized by continuous production, through the tank, while extrusion cooling. As long as the material is constant, it can always be extruded, tens of thousands of meters can be, there is no material. The structure and mechanical properties of the material have been improved, the operation is simple and the productivity is high. It can make long rod, deep hole, thin wall and special section parts. It is an important little or no cutting process.
Extrusion is mainly used for metal forming, but also for plastic, rubber, graphite and clay billets and other non-metallic forming。 A processing method for making various cross-section products or semi-products by continuously passing through the head while being heated and plasticized and pushed forward by the screw。 Literally, it should be a mixer like rubber vulcanization。 Rubber, etc。 should strictly control the moisture content of polycarbonate below 0。02% through two rollers。
In order to avoid mechanical strength reduction or abnormal appearance of bubbles and crazes on the surface of the product。 Polycarbonate has different melting index specifications。 Usually the melt index between 5 and 25 g/lOmin is suitable for extrusion。 However, due to the different types of extruders, shapes of products and specifications of polycarbonate, the flow direction of some metals in the billet is the same as that of the punch。
The other part of the metal flow direction is opposite to the punch movement direction. Only need to change extrusion tools, such as dies, can produce products of different shapes, specifications and varieties on one equipment. The operation of changing extrusion dies is simple, fast, time-saving and efficient. Simply changing the die can be used on the same equipment with different shapes, sizes, specifications and varieties of products, and the operation of changing the die is simple, convenient, time-consuming and efficient.