High-speed printing head of 3D printer

Abstract

The invention discloses a high-speed printing head of a 3D (three-dimensional) printer. The printing head comprises a rack, wherein a hydraulic cylinder is fixed above the rack; a piston of the hydraulic cylinder is fixed with a feeding device capable of sliding up and down along the rack; an outlet of the feeding device is communicated with a nozzle structure through a volumetric metering pump; a feeding pipe is longitudinally arranged on the rack; the feeding device comprises a drive device and a screw rod driven by the drive device to rotate; the feeding pipe encircles the screw rod; a feeding hole is formed above the feeding pipe; a feeding hot-melting cavity is formed below the feeding pipe; the end of the screw rod is sleeved with a one-way valve; the nozzle structure comprises a nozzle pipe communicated with the volumetric metering pump; a multi-nozzle head is rotationally arranged at an outlet end of the nozzle pipe and provided with at least two nozzles with different pore diameters; when an opening, rotated to any nozzle, of the multi-nozzle head points to a workpiece, only the nozzle is communicated with the nozzle pipe; the multi-nozzle head is driven by a rotary power device to rotate. The printing head has the advantages that the printing speed can be increased while a high-precision printing effect is guaranteed.

Description

technical field [0001] The invention relates to printing equipment, in particular to a high-speed printing head for a 3D printer capable of accelerating printing speed while ensuring high-precision printing effect. Background technique [0002] 3D printing technology is a rapid prototyping technology based on digital model files, using metal, plastic, inorganic materials, etc., to construct objects by layer-by-layer printing. At present, the 3D printing technology that uses plastic as the consumable mostly adopts the fused deposition method (FDM technology), that is, after the filamentous hot-melt material is melted, it is extruded through a nozzle and deposited on a platform, and finally formed by layer-by-layer accumulation of materials. object. The consumables used in the existing FDM technology are filamentous materials, and ordinary industrial raw materials cannot be directly used, so the production cost is high. Existing 3D printers only use one type of nozzle for pr...

AI Technical Summary

Problems solved by technology

The consumables used in the existing FDM technology are filamentous materials, and ordinary industrial raw materials cannot be directly used, so the production cost is high

Existing 3D printers only use one type of nozzle for printing. If the nozzle diameter is small, when printing the main body of the product, repeated printing will affect the printing speed. If the nozzle with a large diameter is used, the printing speed can be increased when printing the main body of the product. , but cannot achieve reasonable accuracy when printing edges or details

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