Multi-material variable-diameter screw extrusion 3D printing device

Abstract

The invention relates to a multi-material variable-diameter screw extrusion 3D printing device. An X-axis driving unit is arranged on a bottom plate, a Y-axis driving unit is arranged on the X-axis driving unit, a printing platform is connected above the Y-axis driving unit, and the X-axis driving unit and the Y-axis driving unit drive the printing platform to move horizontally; and a feeding unit and a Z-axis driving unit are installed on a vertical plate, and the Z-axis driving unit drives a printing unit to vertically ascend and descend. Slurry is added into a mixing cavity through a feeding pipe in the hedging direction, and the primary mixing effect is improved when the slurry just enters the mixing cavity; a screw adopts a variable-inner-diameter unequal-depth screw groove design, and when the slurry is mixed by the variable-diameter screw, the flowing direction of the slurry is continuously disturbed, so that the mixing effect of the slurry is further improved; gaps between screw grooves of a feeding section and a mixing section of the variable-diameter screw and the inner wall of a charging barrel are gradually reduced, the extrusion force is continuously increased, and gaps of an extrusion section are not changed, so that the extrusion uniformity and stability of a high-viscosity material are ensured.

Description

technical field [0001] The invention belongs to the technical field of 3D printers, and in particular relates to a multi-material variable-diameter screw extrusion 3D printing device. Background technique [0002] 3D printing technology, also known as additive manufacturing technology, is a new advanced manufacturing technology developed in the late 1980s that integrates machinery, numerical control, computers and materials. 3D printing is a digital manufacturing technology that directly shapes three-dimensional complex structures by simply adding materials layer by layer in two dimensions. It can directly manufacture parts and structures with arbitrarily complex internal structures and unlimited external shapes and geometric dimensions. In addition, during the point-by-point, line-by-line, and layer-by-layer digital printing manufacturing process, it can also flexibly digitally control the materials and components of different parts of the parts. properties, thus endowing ...

AI Technical Summary

Problems solved by technology

Most of the multi-material 3D printers that have been developed have multiple nozzles, which have many shortcomings and limitations: the number of configured nozzles is limited, the structure and operation of multiple nozzles are complex, and multiple nozzles need to be switched frequently, which reduces printing efficiency.

The existing multi-material 3D printing technology basically adopts the method of passive mixing of materials, which cannot realize the active mixing and precise control of the components of multi-materials, and there are uneven mixing of multi-materials, low mixing efficiency, and poor controllability.

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