The design of the parting surface of the automotive vacuum box die-casting mold is a critical and complex process, which directly affects the quality of the die-casting product, the convenience of demolding, and the overall performance of the mold.
1. Product structure analysis is the basis
First, the design of the parting surface requires an in-depth analysis of the structure of the automotive vacuum box. The shape, size, wall thickness and internal structural characteristics of the vacuum box should be considered. For example, if the vacuum box has a complex internal chamber or convex structure, the parting surface should try to avoid cutting off these key parts to avoid affecting its function and appearance quality. For vacuum boxes with thin-walled parts, the selection of the parting surface should help the molten metal to evenly fill these thin-walled areas during the die-casting process to prevent undercasting or cold shut.
2. The principle of demolding convenience
The design of the parting surface should fully consider the convenience of demolding. Generally speaking, the parting surface should be set along the maximum contour of the vacuum box, so that after the die-casting is completed, the product can be easily removed from the mold cavity. For vacuum boxes with structures such as undercuts, side holes or undercuts, the position of the parting surface needs to be determined in combination with the core pulling mechanism. For example, when there is a side hole, the parting surface can be designed on one side of the side hole, and the side hole can be formed and demolded through the side core pulling mechanism, while ensuring the smooth opening and closing of the mold.
3. Ensure the quality of die casting
In terms of die casting quality, the design of the parting surface should be conducive to the flow and filling of the molten metal. The molten metal should be able to fill the entire cavity smoothly and quickly under pressure. For example, designing the parting surface at a suitable position on the top or side of the vacuum box can guide the molten metal to flow into the cavity from multiple directions, reducing eddy currents and air entrainment. At the same time, the sealing of the parting surface is also crucial. Good sealing can maintain a stable vacuum degree during the die casting process, thereby reducing the pores inside the vacuum box and improving product quality.
4. Mold manufacturing and cost considerations
From the perspective of mold manufacturing, the design of the parting surface should be as simple and regular as possible to reduce the difficulty and cost of mold processing. Avoid designing overly complex parting surfaces, such as twisted or multi-level parting surfaces, which will increase the workload and processing accuracy requirements of mold manufacturing. Moreover, simple parting surfaces are more convenient for mold repair and maintenance, which helps to shorten repair time and reduce repair costs.
The parting surface design of the automotive vacuum box die-casting mold needs to comprehensively consider multiple factors such as product structure, demolding, die-casting quality, mold manufacturing and cost. Through reasonable design, high-quality and efficient die-casting production can be achieved.
