A 3D printing self-adaptive compression feeding mechanism and printing method

Abstract

The invention belongs to the technical field of printing equipment, and discloses a 3D printing adaptive compression feeding mechanism and a printing method thereof. A left feeding mechanism and a right feeding mechanism of the 3D printing adaptive compression feeding mechanism are the same in structure and are symmetrically arranged on the same horizontal plane; and the left feeding mechanism isprovided with a motor, a feeding gear mechanism, a V-shaped grooved wheel mechanism arranged on the same horizontal plane of the feeding gear mechanism, a guiding pipe arranged on the lower parts of afeeding gear and the V-shaped grooved wheel mechanism, and a stopping pin device arranged on the upper part of the V-shaped grooved wheel mechanism. According to the 3D printing adaptive compressionfeeding mechanism, the feeding devices are suitable for simultaneous printing of different materials, and the printing efficiency can be effectively improved; and before each layer of printing and spraying head alternate work, a working spraying head prints a layer of detecting samples in advance, flow materials are prevented from scratching the surfaces of the samples in the printing process, byprinting the detecting samples, the printing defect caused by insufficient discharging at the exchange printing initial period of double spraying heads is prevented, and thus the printing quality is improved.

Description

technical field [0001] The invention belongs to the technical field of printing equipment, and in particular relates to a 3D printing self-adaptive compression feeding mechanism and a printing method. Background technique [0002] Currently, the closest prior art: [0003] 3D printing is used in various industries. It is a technology that manufactures products through layer-by-layer printing methods. Among them, fused deposition technology (FDM) technology is the most widely used. Based on digital models, thermoplastic and other bondable materials are heated to glass transition. Above the temperature, the material is extruded and solidified during the movement of the nozzle to construct a three-dimensional solid. A stable feed extrusion mechanism and strict height control of the nozzle from the bottom plate are the keys to successful printing of the product. [0004] At present, most 3D printers use the motor-driven feeding gear and the bearing V-shaped groove wheel to coo...

AI Technical Summary

Problems solved by technology

Therefore, the direction of friction generated by the printing wire at the contact surface of the feeding gear and the contact surface of the V-shaped groove wheel is opposite. The unbalanced friction on both sides of the printing wire makes the driving force of the feeding very small, so that the wire often appears during the printing process. undersupply problem

Moreover, due to the fixed installation position design of the feeding gear and the V-shaped groove wheel, the feeding mechanism cannot automatically adjust the extrusion force according to the actual needs of the printing wire. inefficiency

[0008] (2) In the prior art, when the supply speed of the material changes, especially when the speed increases, it is unavoidable that the soft material will be stacked in the triangular area formed by the feeding gear and the V-shaped groove wheel, and the hard material will gnaw. The feeding mechanism does not meet the needs of printing materials with different hardness, so the compatibility of materials used is poor

[0009] (3) In the prior art, when different materials are printed with dual nozzles, the height of the dual nozzles cannot be adjusted. Due to installation errors, the non-working nozzles will scratch the surface of the printed product as the working nozzles move during the printing process.

However, the compression mechanism in this patent cannot be adjusted automatically, and the problem of feed blockage during the printing process cannot be solved in time, which affects the printing progress; Larger space, when printing flexible materials, wires tend to stack in this area, affecting normal feeding

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