In casting process design, in order to ensure the individuality and high-quality characteristics of valve castings, our lean design technology in castings is a technical method worth learning and promoting. It can guarantee the original function design of the product to the greatest extent, and at the same time guarantee the Operability of the manufacturing process.
When designing the casting process of a certain valve casting, the inner gate of the general structure product design makes full use of the falling off during the vibration shelling process to reduce the dropping process; the dropping parts that can be hammered should be dropped by hammering as much as possible, do not design as cutting parts or gas cutting parts.
To optimize the casting process of valve castings, fully consider the functions of the gating system such as shrinkage, dewaxing, slag removal, and exhaust, and the operability of shell making, so as to improve the success rate of deep holes, blind holes, grooves, characters, etc. Follow the principle of sequential solidification or simultaneous solidification as much as possible; at the same time, make good use of the pouring riser for feeding; reduce the casting temperature of molten steel; add thermal insulation and heating agents to the sprue cup after casting to reduce internal casting defects; The rejection rate, repair rate, to achieve the goal of zero defect products.
