Follow-up heating sand model 3D printing formation method

Abstract

The invention belongs to the field of rapid formation and discloses a follow-up heating sand model 3D printing formation method. According to the method, in the sand model 3D printing process, a present sand layer after printing is heated, and then the curing speed of a sand model can be increased. A follow-up heating device and a printing nozzle are mounted together, and a printed sand model is heated along with movement of the printing nozzle; later, a working table descends for a thickness of a fixing layer, and a sand spreading device is moved to spread sand; and the sand is spread layer by layer, layer by layer printing / heating is carried out, and thus sand model manufacturing is completed finally. By adopting the sand model manufactured by using the method, the problem that a formerlayer of a sand model is damaged because of a low sand layer curing speed in the sand spreading process can be effectively avoided, the sand model printing quality and the product pass percent can beincreased, and the formation method has popularization and use values.

Description

technical field [0001] The invention belongs to the field of rapid prototyping, and in particular relates to a sand mold 3D printing forming method with dynamic heating. Background technique [0002] Sand mold 3D printing technology refers to the technology of using print head, nozzle or other printing technology to deposit materials to manufacture sand molds. It belongs to a kind of additive manufacturing technology and is an important direction of current research in the field of rapid prototyping. It refers to the combination of converting the complex three-dimensional model of the required shaped workpiece into a simple two-dimensional section through slicing. Use material powder to print layer by layer, accumulate layer by layer, and form sand molds with arbitrary complex structures from bottom to top. [0003] At present, sand mold 3D printing equipment is mostly rapid prototyping equipment based on powder bed. The forming process involves the storage, supply, laying,...

AI Technical Summary

Problems solved by technology

The sand laying device of the existing 3D printing equipment generates an interaction force on the previous layer of printed sand molds during the sand laying process. If the previous layer of printed sand molds has a slow curing speed and low self-strength, it will be damaged under this force

As a result, it will cause defects in the sand mold and reduce the pass rate of the sand mold.

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