What is the basic principle of injection molding processing?
The comprehensive injection molding process is to flow plastic melt into a closed mold cavity under high pressure, heat and solidify it, and obtain plastic products that are completely consistent with the shape of the mold cavity. Below, Dongguan injection molding manufacturers will provide you with a detailed explanation of the basic principles of large-scale injection molding!
Plasticization: During the injection molding process, solid plastic travels upward through a rotating screw, moves in the direction of the groove at intervals, and is heated, compacted, stressed, and mixed through threads. It has been transformed into a delicious fluid plastic melt with symmetrical density, viscosity, and composition, and is originally stable.
Injection molding process: The plasticized plastic melt is stored in the storage area of the barrel, and the screw rotates during the injection process. Under the pressure of screw injection, the plastic melt passes through the cylinder at a certain rate. Pour the nozzle in the front section, the forming mold casting system, etc. into the cavity of the mold.
Cooling and solidification process: The plastic melt flowing into the mold cavity fills the cavity to eliminate various flow resistance. The plastic melt added to the cavity is subjected to immense pressure originating from the cavity, which drives the flow of the plastic melt. The trend of returning to the cylinder is due to the cooling effect of the cavity, which heats and expands the plastic melt. At this point, the screw is used to obtain pressure again to maintain the addition of plastic melt into the cavity and prevent it from migrating, and the mold cavity is appropriately replenished through plastic melting. The main body adds a contraction space within the cavity until the plastic melt gradually heats up and solidifies into the product.