Quick manufacturing method for die-free casting sand mold

Abstract

The invention belongs to the technical field of casting and discloses a quick manufacturing method for a die-free casting sand mold. The quick manufacturing method comprises the following steps of: paving a layer of phenolic resin coated sand on a worktable by adopting a relevant power paving system in die-free casting sand mold manufacturing equipment controlled by a computer; secondly, driving an injection system of the equipment to inject solvent according to a contour data information instruction of each layer of section of the sand mold, which is acquired by the computer; melting and bonding the injected part of phenolic resin coated sand to form; drying; after finishing the forming of one layer, descending the worktable by a story height; carrying out power pavement, solvent injection and drying of next layer until a casting sand mold solid is formed by stacking and curing layer by layer; removing residual sand; and drying and curing the residual sand to obtain the casting sand mold with high strength. The quick manufacturing method disclosed by the invention has the characteristics of no heating required for initial curing and lower deformation of a sand core; meanwhile, the consumption of resin is reduced, and thus the defect of high gas forming amount of the casting sand mold is avoided. The quick manufacturing method has the advantages of low cost of used solvent, environment friendliness, energy source saving and popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a rapid manufacturing method of a moldless casting mold. Background technique [0002] Most of the current rapid prototyping technology is based on layered manufacturing technology. Layered manufacturing technology is to decompose the processed object into multiple parallel thin layers. During the processing process, these thin layers are formed layer by layer and superimposed to complete the manufacturing. This process is often realized with the help of computer technology. [0003] There are two common methods for rapidly making casting sand molds (including sand molds and sand cores, hereinafter collectively referred to as molds) using layered manufacturing technology: [0004] One is to use laser to selectively sinter the coated sand. First, lay a layer of coated sand on the workbench and heat it to a temperature slightly lower than the melting point of the coate...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a rapid manufacturing method for moldless molds, which can reduce the amount of deformation of molds made and improve the The assembly quality of the mold and the core improves the dimensional accuracy of the casting; at the same time, it reduces the amount of resin used, thereby avoiding the lack of large gas generation in the mold

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