A kind of micro-spray bonding forming method of ceramic core blank

Abstract

The invention discloses a micro-jetting bonding forming method of a ceramic mould core blank, and belongs to the technical field of rapid manufacturing. The micro-jetting bonding forming method comprises the following steps: (1) according to the outline size of a ceramic mould core to be formed, performing three-dimensional modeling on the ceramic mould core, and slicing a three-dimensional model layer by layer by using slicing software to obtain a layer-by-layer splicing manufacturing instruction; (2) laying a ceramic powder base material; (3) jetting nano-sized dispersion liquid by using a spray head so as to bond a ceramic powder base material layer into a current layer outline; (4) after forming the current layer outline, moving down a powder bed in the Z-axis direction by a layer thickness; (5) sequentially repeating the step (2) to the step (4) until an initial ceramic mould core blank is formed; (6) leaving to stand to dry and cure the initial ceramic mould core blank obtained in the step (5) so as to obtain the ceramic mould core blank. By the micro-jetting bonding forming method, the problems that in the present micro-jetting bonding forming process, the ceramic blank is low in intensity, large in sintering deformation and low in forming accuracy are solved.

Description

technical field [0001] The invention belongs to the technical field of rapid manufacturing, and more specifically relates to a micro-spray bonding rapid prototyping method of a ceramic core body. Background technique [0002] In ceramic type investment casting, the demand for precision castings with narrow cavity and complex shape is increasing. When obtaining a ceramic shell with a complex inner cavity structure, it is difficult to implement processes such as paint coating and sanding, which need to be completed with the help of a ceramic core. Ceramic cores can usually be formed by grouting, hot pressing, injection, gel injection molding and other processes. However, the processing difficulty of the core box used to form the ceramic core is limited by the structure and shape of the core, and its processing efficiency is low and the cost is high. Therefore, it is the development trend of the current foundry industry to realize moldless rapid precision forming of ceramic c...

AI Technical Summary

Problems solved by technology

[0012] Aiming at the above defects or improvement needs of the prior art, the present invention provides a micro-spray bonding forming method for ceramic core blanks, the purpose of which is to spray nano-dispersion liquid into the ceramic powder matrix material, and the nano-dispersion liquid The nano-powder fills the pores in the ceramic powder matrix material, increases the density of the powder layer, and increases the number of bonded bridges per unit area, thereby solving the problems of low strength, sintering deformation and linear shrinkage of the existing micro-spray bonded ceramic body. larger technical issues

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