Die casting molds consist of numerous components, each playing an indispensable role. Below are some key components of a die casting mold and their main functions:
Standing Mold: Connected to the injection section of the die casting machine and fixed to the head plate, it provides the basic shape and dimensions for the casting.
Moving Mold: Mounted on the middle plate of the die casting machine, it moves with the middle plate, closing or separating from the stationary mold to complete the casting process.
By deeply analyzing the working principles and synergistic effects of these key components, we can gain a more comprehensive understanding of the core position of die casting molds in production and their impact on casting quality.
Standing Mold (Front Mold): The stationary mold is the core component of the die casting mold, closely connected to the injection section of the die casting machine and fixed to the head plate. It not only communicates with the gating system but is also a crucial part in the formation of the casting cavity. The fixed mold consists of multiple components, including a fixed mold insert, a fixed mold plate, guide pillars, clamping blocks, angled guide pillars, a sprue bushing, and a fixed mold core-pulling mechanism. Each part is meticulously designed to ensure casting quality and smooth production.
The moving mold (rear mold): As another core component of the die-casting mold, the moving mold, together with the fixed mold, forms the forming part of the die-casting mold. It is securely mounted on the middle plate of the die-casting machine and closes and separates from the fixed mold as the middle plate moves. Furthermore, the moving mold is equipped with a core-pulling mechanism and an ejection mechanism, which play a crucial role in the casting forming and removal process.
The core-pulling mechanism (also known as the sliding mechanism): Its core function is to handle the movable core of the forming part that is not aligned with the mold opening direction. This mechanism is mainly composed of multiple precision-engineered components such as angled guide pillars, side cores, sliders, guide grooves, limit blocks, screws, springs, nuts, and bolts, which together ensure the smooth forming and removal of the casting.
Angled pin (also known as angled guide post): The angled pin is a key component in the core-pulling mechanism. Its function is to push the slider to move during mold opening, thus smoothly pulling out the core. Depending on the application, angled pins can be divided into internal and external core-pulling types. Their cross-section is usually designed as a flattened oval to avoid scratching the slider during the core-pulling process.
Key parameters: The design of the angled pin involves several key parameters, including the angle α, which directly affects the core-pulling force and stroke. In addition, the bending force it can withstand is also an indispensable consideration. The angle α is typically chosen to be 10°, 15°, 18°, 20°, or 25° to suit different application requirements.
