3D printing head with follow-up pressurization and heating

Abstract

The invention provides a 3D printing head with follow-up pressurization and heating. The strength of a printing piece can be simply and effectively improved. A printing head body, an axial driving mechanism and a heating unit of the 3D printing head with follow-up pressurization and heating are separately relatively fixed to a Z-axis linear module. A pressurization plate is positioned under the printing head body and is fixedly connected with the output end of the axial driving mechanism, and can vertically reciprocate under the action of the axial driving mechanism. A central coaxial throughhole is formed in the position, corresponding to the printing head body, of the pressurization plate to avoid interference with the printing head body. The heating unit surrounds the bottom of the printing head body and keeps a distance from the pressurization plate. According to the 3D printing head with follow-up pressurization and heating, a vibration (pressurization) and heating mechanism which follows the printing head to move overall is designed at the position of the printing head, the synchronized heating mechanism can preheat a printed layer, and the mutual combination of adjacent interlayer materials is promoted; and on the basis, the pressurizing plate flattens and compacts the printed layer, so that the interlayer combination strength is further improved.

Description

technical field

[0001] The invention relates to a 3D printing head applied to fusion deposition modeling (FDM) technology. Background technique

[0002] At present, all 3D printing technologies on the market (specifically FDM fused deposition molding) produce printed products with low overall strength, especially the interlayer bonding strength.

[0003] In order to improve the strength of printed parts, the methods widely used at present are: first, by modifying the printing raw materials or adding glass fiber, carbon fiber, etc., to increase the strength of the material itself to indirectly increase the strength of the printed parts; The printed part is locally strengthened, and the stressed position is thickened to improve the local strength.

[0004] However, the above methods either increase the cost of raw materials or increase the printing time; at the same time, the addition of glass fiber and carbon fiber will reduce the surface quality of the printed part, and the...

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