Melt extrusion device, 3D printer, 3D printer control method and application

Abstract

The invention discloses a melt extrusion device, a 3D printer, a 3D printer control method and application. The melt extrusion device is used for melt extrusion of raw materials of the 3D printer, themelt extrusion device comprises a screw assembly and a spray head assembly connected with the screw assembly, the screw assembly comprises a shell and at least two screws arranged in the shell, threads of the adjacent screws are meshed with each other, the raw materials are evenly mixed and melted through homodromous rotation of the screws, and the molten raw materials are extruded through the spray head assembly. According to the melt extrusion device, the 3D printer, the 3D printer control method and application, the at least two screws are meshed with each other and rotate in the same direction, the raw materials are gradually molten under rotary shearing of the screws, the shearing rate and shearing stress of a melt at the meshed position are large, good back mixing is generated, andthe distribution mixing capacity of the multiple raw materials is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and more specifically relates to a melting extrusion device, a 3D printer, a 3D printer control method and an application thereof. Background technique [0002] In recent years, 3D printing technology has developed rapidly. According to different forming methods, it can be mainly divided into fused deposition modeling (FDM), selective laser melting (SLM), laser cladding forming (LENS), selective laser sintering (SLS), optical Solidification forming (SLA), three-dimensional printing forming (3DP), etc. Among them, FDM technology has been widely used because of its low cost, simple principle and small size of equipment. At present, FDM technology mainly uses thermoplastic polymer wires such as PLA and ABS as raw materials, which are sent into the high-temperature melting chamber at 200-240°C by the wire feeding mechanism, and finally sprayed out by the nozzle at a specific position of the hot ...

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Problems solved by technology

[0007] In view of the above defects or improvement needs of the prior art, the present invention provides a melt extrusion device, a 3D printer, a 3D printer control method and its application, the purpose of which is to control the material composition ratio point by point, line by line and layer by layer in the printing process in real time, Realize the complex structure-function integrated forming of composite materials and heterogeneous gradient materials, thereby solving the problem that the extruded melt in the prior art contains many bubbles, the density is not high, and the arbitrary distortion of the extrusion direction cannot be controlled, and it cannot meet the requirements. The technical problem of controlling the proportion of material composition point by point by line by layer

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