Casting mold three-dimensional printing formation method

Abstract

The invention belongs to the technical field of rapid casting and discloses a casting mold three-dimensional printing formation method. The method comprises the following steps of 1, preparing a liquid binding agent; 2, preparing mixed powder; and 3, putting the liquid binding agent prepared in step 1 into an ink-jet printing head of rapid formation equipment, putting the mixed powder prepared in step 2 into a powder cylinder, starting the rapid formation equipment to conduct three-dimensional printing formation, in the printing process and / or after part printing is completed, solidifying a part through heating and / or microwave drying, and after solidification is completed, removing excessive powder, so that the needed casting mold part is obtained. According to the casting mold three-dimensional printing formation method, the liquid binding agent is a water-based binding agent and stable in property; the situation that a nozzle is blocked due to deterioration of the liquid binding agent cannot occur easily; technological stability of casting mold three-dimensional printing is improved; it is helpful to lower use cost; in addition, an inorganic binding agent material is adopted, and the gas generation amount of a casting mold is reduced; and it is helpful to reduce possibility of generation of defects such as air holes in a casting.

Description

technical field

[0001] The invention belongs to the technical field of rapid casting, and more specifically relates to a three-dimensional jet printing forming method of a mold. Background technique

[0002] Three-dimensional printing (Three-dimensional printing, 3DP) is also known as powder bonding three-dimensional printing or micro-jet bonding technology. Its process principle is to use computer technology to slice the three-dimensional CAD model of the part in the vertical direction according to a certain thickness. The original 3D CAD information is converted into a collection of 2D layer information. The molding equipment uses the movement of the nozzle on the surface of the powder bed according to the contour information of each layer to selectively spray liquid droplets on the powder surface to bond part of the powder. Form the cross-sectional profile of the current layer, cycle layer by layer, and the layers are also fixed by the bonding effect of the bonding soluti...

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