Hollow wall formwork extrusion 3D printing device and printing method in inner mold

Abstract

The invention relates to a 3D printing device and method for a hollow wall. The device comprises a printing head capable of reaching any position of the space where a wall to be constructed is located, a printing head control device, and a feed system for feeding pulp to the printing head. By means of the printing head composed of an extruding mold and a mask, an extruding mold cavity is formed in the mold wall of the extruding mold in a penetrating mode, the extruding mold and the mask can relatively move in a controlled mode, the mask covers the extruding mold and forms a movable seal together with the extruding mold, a long and narrow strip-shaped masking cavity is formed in the mask in a penetrating mode, pulp is sequentially extruded through a channel formed by the mask and the extruding mold, and the hollow wall can be printed by changing a printing head extruding opening and through the cooperation of the motion of the printing head. When a complex cross section is printed and constructed, only movement and reciprocation synchronous with the movement need to be conducted without conducting corresponding complex track movement through the printing head, and therefore the 3D printing device is simple in printing mode, simple in mechanism and not prone to damage.

Description

technical field [0001] The invention relates to a manufacturing device and a manufacturing method of a building hollow wall, in particular to a hollow wall formwork extrusion 3D printing device and printing method in an internal mold. Background technique [0002] The 3D printing method of the hollow wall in the prior art usually divides the structure of the hollow wall in the thickness direction into several parts for printing respectively, such as Figure 6 As shown, the structure of the hollow wall in the thickness direction is composed of the walls on both sides and the corrugated wall ribs in the middle. When printing, use a printing gun that can continuously extrude the slurry as the print head, and print the corrugated ribs first, with After the corrugated wall bars are printed to a certain length and height, the walls on both sides are printed separately. In this way, it is time-consuming and there are problems of bonding and bonding strength between the wall and the ...

AI Technical Summary

Problems solved by technology

[0002] The 3D printing method of the hollow wall in the prior art usually divides the structure of the hollow wall in the thickness direction into several parts for printing respectively, such as Image 6 As shown, the structure of the hollow wall in the thickness direction is composed of the walls on both sides and the corrugated wall ribs in the middle. When printing, use a printing gun that can continuously extrude the slurry as the print head, and print the corrugated ribs first, with After the corrugated wall bars are printed to a certain length and height, the walls on both sides are printed separately. In this way, it is time-consuming and there are problems of bonding and bonding strength between the wall and the corrugated wall bars.

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