Containerless casting molding method of frozen sand mold

Abstract

The invention discloses a containerless casting molding method of a frozen sand mold, and belongs to the technical field of casting rapid molding. The method includes the steps that according to the characteristics of a casting, proper molding sand is selected and used and is evenly mixed with liquid, and a filling mold is placed in the frozen environment; after the molding sand is frozen and cured, a sand blank is obtained and placed on a machining platform to be fixed; the sand blank is directly cut and machined on machining equipment, and a casting mold is obtained; and finally, under the frozen environment, casting is carried out, and a final casting is obtained. According to the method, water or a solution is adopted to serve as a binding element, the source is wide, the price is low, organic resin and other binding elements are not used, and the problems that in the pouring process, the gas-forming amount is large, and waste sand is difficult to recycle are solved. The containerless casting molding method is an environment-friendly green casting method and is suitable for part rapid development trial production and small-batch production.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a moldless casting forming method of a frozen sand mold. The invention is suitable for small batch production of a single piece of metal parts and rapid development and trial production of parts. Background technique [0002] Casting is one of the main methods to obtain mechanical product blanks, and is an important basic process in the machinery industry. The traditional casting process needs to make molds with many production processes and long production cycle; manual operation is labor-intensive; the development of finished products is expensive and the working environment is harsh. [0003] The moldless casting manufacturing process is a combination of rapid prototyping technology and traditional sand molding technology. At present, the typical cad direct casting process mainly includes the PCM process, which adopts the contour scanning spray solidification pro...

AI Technical Summary

Problems solved by technology

For single-piece small-batch production, the cost is high, toxic gas is produced, and the environment is polluted

The 3DP process adopts the method of spraying the adhesive point by point to bond the powder to manufacture the prototype. The GS process first uses a multi-channel nozzle to spray the resin evenly, then another nozzle sprays the curing agent, and finally solidifies the layers. It is difficult to clean the sand in this process. Special processing procedures affect sand mold accuracy and surface quality

[0005] In short, in the existing technology, for the rapid development of new products and the production of small batches of parts, there are high development costs; the production process uses organic resin or other solutions as binders, which greatly increases the amount of mold gas generation, and pouring Harmful gases are produced during the process, which is easy to pollute the environment; at the same time, the follow-up waste sand recovery process is difficult, costly, and pollutes the environment

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