The Importance of Medium Pressure Injection Mechanism in Aluminum Alloy Die Casting Machine
Release time:
2023-03-17
Source:
The basic structure of the aluminum alloy die casting machine includes a mold closing mechanism, a press injection mechanism, a push out mechanism, a power transmission system, and a control system. Each mechanism is essential. Today, let's talk about the press injection mechanism.
The injection mechanism of an aluminum alloy die casting machine is a mechanism that pushes molten metal into the mold cavity, fills it into shape, and then becomes a die casting. Different models of aluminum alloy die casting machines have different injection mechanisms, but the main components include a pressure chamber, injection punch, injection rod, injection cylinder, and supercharger. Its structural characteristics determine the main parameters in the process of die casting, such as injection speed, injection specific pressure, and injection time. These main parameters directly affect the filling shape of liquid metal and its movement characteristics in the mold cavity, and thus also affect the quality of the die casting.
The die casting machine with excellent performance injection mechanism is a reliable guarantee for obtaining high-quality die castings. The general trend in the development of injection systems is to achieve fast injection speeds, high pressure at the end of the die casting stage, and low pressure peaks. The main characteristics of the injection mechanism of modern die casting machines are three stages of injection, namely, two stages of low speed exhaust of gas from the pressure chamber and high speed filling of the mold cavity, as well as a one-stage pressurization that continuously applies stable high pressure to the liquid metal.
The injection mechanism for aluminum alloy die casting is particularly important throughout the entire process, as it is the key to connecting the front and rear of the injection. After filling and molding, an exit mechanism is used to push the molded die castings and sprue aggregates from the mold. The force, speed, and time of pushing are adjustable and dynamic.