In valve chip die casting mold custom processing, the insert structure design plays a key role in optimizing the overall strength of the mold, directly affecting the service life of the mold and the die-casting quality of the valve chip.
First, the material selection of the insert is the basis. Usually, materials with high strength, high hardness and good heat fatigue resistance are required, such as hot working die steel H13. High-quality materials can withstand the impact of high-temperature molten metal, high pressure and repeated thermal expansion and contraction during the die-casting process. For example, when die-casting aluminum alloy valve chips, the molten metal temperature can reach above 600℃. If the insert material is not good, it is easy to soften, deform or even crack in a short time, resulting in mold failure. Through reasonable material selection, the insert can provide basic strength guarantee under harsh working conditions, thereby improving the overall strength of the mold.
Secondly, the shape and size design of the insert are crucial. Its shape should be optimized according to the shape characteristics of the valve chip to avoid sharp angles or thin edge structures where stress concentration occurs. In terms of size, it is necessary to ensure that the insert has sufficient volume and thickness to disperse the pressure during die casting. For example, for larger valve pieces, a split insert design can be used to decompose the overall force into multiple smaller areas, reducing the peak pressure of a single insert. At the same time, the connection parts between the inserts should be designed with reasonable transition fillets and matching tolerances to ensure tight connection and uniform stress transmission under high pressure, prevent local strength weaknesses caused by poor insert connection, and optimize the overall strength distribution of the mold.
Furthermore, the layout and fixing method of the inserts affect the strength stability of the mold. A scientific insert layout should make the pressure evenly distributed in the mold to avoid pressure concentration areas. For example, for the die-casting mold of a circular valve piece, a ring insert layout can be used to make the pressure of the molten metal in all directions act evenly on the insert. The fixing method of the insert, such as using high-strength bolts or positioning pins with tight matching tolerances, can ensure that the position of the insert in the mold is stable, and it will not be displaced or loosened during the die-casting process, thereby maintaining the integrity and strength of the overall structure of the mold.
The insert structure design in valve chip die casting mold custom processing takes into account multiple aspects such as material, shape, size, and layout fixation, effectively optimizing the overall strength of the mold. This not only extends the service life of the mold and reduces production costs, but also ensures that the valve plate is accurate in size and stable in quality during the die-casting process, improves production efficiency and product qualification rate, and provides solid mold technology guarantee for valve plate die-casting production.
