2021-07-14
La machine de moulage par injection et la seringue utilisée pour l'injection ont un principe de fonctionnement relativement similaire. C'est un processus dans lequel le plastique plastifié à l'état fondu (c'est-à-dire à l'état d'écoulement visqueux) est injecté dans la cavité fermée du moule par la poussée de la vis (ou du piston), et le produit est obtenu après solidification et mise en forme.
Tout d'abord, ajoutez du plastique granulé ou en poudre dans le canon dumachine de moulage par injection. Le plastique est fondu par la rotation of the screw and the outer wall of the barrel. Then the machine closes the mold and moves the injection seat forward, and the nozzle is close to the gate of the mold. , And then pass the pressure oil through the injection cylinder and push the screw forward. Thus, the molten material is injected into the closed mold with a lower temperature at a high pressure and a faster speed. After a certain period of time and pressure holding (also called pressure holding), cooling, solidification and molding, the product can be opened and the product can be taken out. (To ensure that the product has a certain density and dimensional tolerances, it is the purpose of maintaining pressure to supplement the material in the cavity to avoid the reflux of the melt in the cavity). Plasticization, injection and molding are the basic requirements of injection molding. The prerequisite for the quality of the formed product to be achieved and guaranteed is plasticization, and there is a high pressure response in the cavity (20-45MPa is usually the average pressure in the cavity), so the machine de moulage par injection has enough Large clamping force. It can be seen that the injection device and clamping device of the key part of the machine de moulage par injection.