A method and device for forming a 3D printing ice casting sand mold

Abstract

The invention belongs to the technical field of casting, and discloses a rapid manufacturing method of a moldless casting mold. The method is to cool the temperature of the molding sand to -40°C to -10°C. In a low temperature environment, the computer controls the working platform to move down for a certain distance and lay a layer of frozen bottom sand, and then move down the working platform for a layer thickness and lay a layer. For low-temperature molding sand, the computer controls the nozzle to spray water or aqueous solution according to the cross-sectional shape of the current layer of mold to solidify the sand mold. Print layer by layer to complete the cast. The present invention also proposes a device for 3D printing ice casting sand mold method, including: a low-temperature forming chamber; a working platform that can be lifted; a powder spreading device and a two-dimensional motion system; The array nozzles connected to the system spray water or aqueous solution; the feeding system is used to provide low-temperature molding sand. Adopting the method to manufacture molds has the advantages of environmental protection, fast manufacturing speed, low cost, low gas generation, no deformation, etc., and has the value of popularization and use.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a rapid forming method of a moldless mold and a forming device for a moldless mold. Background technique [0002] Most of the current rapid prototype technology (rapid prototype) is based on layered manufacturing technology. Layered manufacturing technology is to decompose the processed object into multiple parallel thin layers. During the processing, these thin layers are formed layer by layer and superimposed to complete manufacture. This process is often realized with the help of computer technology. [0003] There are two common methods for quickly making casting sand molds (including sand molds and sand cores, hereinafter collectively referred to as molds) with layered manufacturing technology: [0004] One is the selective sintering of coated sand with laser. The basic method is: first lay a layer of coated sand on the workbench, and heat it to a temperature ...

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the sand mold resin content is high, it is difficult to remove the sand after the mold is processed, the casting defect rate is high in the subsequent casting process, and it is easy to pollute the environment

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