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Sand precision casting, factories producing in large quantities should create conditions to adopt advanced molding and core making methods. The productivity of old-fashioned shock-absorbing or shock-absorbing molding machine production lines is not high enough, the labor intensity of workers is high, the noise is loud, and they are not suitable for the requirements of large-scale production. Therefore, they should be gradually transformed. For small castings, a boxless high-pressure molding machine production line with horizontal or vertical parting can be used. The production efficiency of solid molding is high and the footprint is small; For intermediate parts, various high-pressure molding machine production lines and air impact molding lines can be used to meet the requirements of fast and high-precision molding production lines. Core making methods can be selected, such as cold core box, hot core box, shell core and other efficient core making methods.

For medium batch large castings, resin self hardening sand molding and core making can be considered.

For heavy castings produced in small batches, manual molding is still an important method. Manual molding can adapt to various complex requirements and is relatively flexible, without requiring a lot of process equipment. It can be applied to water glass sand molds, VRH water glass sand molds, organic ester water glass self hardening sand molds, clay dry molds, resin self hardening sand molds, and cement sand molds; For heavy castings produced in a single piece, the pit forming method has low cost and fast production.

It is more suitable to use multi box molding and split box molding methods for mass production or long-term production of standardized products. Although the investment in molds, sandboxes, etc. is initially high, it can be compensated by saving molding time and improving product quality. Low pressure casting, die-casting, centrifugal casting and other casting methods are only suitable for mass production due to the expensive equipment and molds. The conditional method should be suitable for producing castings such as large machine tool bed bodies. Generally, the core forming method is used, without making patterns or sandboxes, and the core is formed in a pit; And other factories use the sand box molding method to produce patterns.

Different enterprises have different production conditions (including equipment, site, employee quality, etc.), production habits, and accumulated experience. Therefore, it is necessary to consider what products are suitable for production and what products are not suitable (or cannot be) produced based on these conditions. The precision requirements and costs of castings obtained by various casting methods are different, and the initial investment and productivity are also inconsistent, resulting in differences in the final economic benefits. Therefore, in order to achieve more, faster, better, and more cost-effective, we should take into account all aspects. A preliminary cost estimate should be made for the selected casting method to determine a casting method that is economically efficient and meets the requirements of the casting.