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The requirements for precision casting are more flexible

The requirements for precision casting are more flexible

In the case of sand casting, we should create conditions for the production of high-precision castings. The productivity of the old-style shock-type or shock-pressure molding machine production line is not high enough. The labor intensity of the workers is large, the noise is large, and it is not suitable for the requirements of mass production. It should be gradually modified. For small castings, it is possible to use a horizontal or vertical type of boxless high-pressure molding machine production line, real modeling and high production efficiency, and a small footprint; for the middle part, various high-pressure molding machine production lines and gas can be selected. The molding line is designed to meet the requirements of fast and high-precision molding production lines. The core-making method can be selected: high-efficiency core-making method such as cold core box, hot core box and shell core, and medium-sized large castings can be considered to apply resin self-hardening sand. Modeling and core making.

Manual casting is still an important method for heavy-duty castings produced in small batches. Manual molding can adapt to a variety of complex requirements and is flexible, and does not require a lot of process equipment. Water glass sand type, VRH water glass sand type, organic ester water glass self-hardening sand type, clay dry type, resin self-hardening sand type and cement sand type can be applied; for heavy-duty castings produced by one piece, the pit modeling method is low in cost and put into production fast. Large-scale production or long-term production of styling products is more suitable for multi-box modeling and box molding. Although molds, sand boxes, etc. start to invest high, they can be compensated for saving mold time and improving product quality.

Casting methods such as low-pressure casting, die-casting, and centrifugal casting are only suitable for mass production because of the high cost of equipment and molds.

Conditional method should be suitable

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