a 3d printer

Abstract

The invention discloses a 3D printer. The 3D printer comprises a framework, a first guide shaft, a second guide shaft, a printing head, a first drive mechanism and a second drive mechanism. An included angle is formed between the first guide shaft and the second guide shaft. The two ends of the first guide shaft and the two ends of the second guide shaft are in sliding fit with the framework. The printing head is connected with the first guide shaft and the second guide shaft and can move along the first guide shaft and the second guide shaft. The first drive mechanism and the second drive mechanism are connected with the printing head in a transmission mode. The first drive mechanism is used for driving the printing head to move along the first guide shaft, and the second drive mechanism is used for driving the printing head to move along the second guide shaft. The printing head can accelerate and decelerate easily under driving of the first drive mechanism and the second drive mechanism, so that rapid printing is achieved, and the printing precision is high.

Description

technical field [0001] The invention relates to a printer, in particular to a 3D printer. Background technique [0002] The basic principle of 3D printing technology is "print layer by layer, layer by layer superimposition", that is, first generate a 3D model through CAD software, then slice it by the host computer slicing software and generate a code file containing printing path information, and finally import it into the lower computer for control The controller is used to control the operation of the whole machine, so as to realize the printing of the model. [0003] However, the printing speed of the existing 3D printers is relatively slow and the printing effect is quite rough, which has a large gap with the low price, fast printing speed and good printing effect expected by consumers. Existing 3D printers have the following defects: [0004] 1. The design of the motion mechanism of the X-axis and the Y-axis of the printer is different, which will cause the inertia a...

AI Technical Summary

Problems solved by technology

[0004] 1. The design of the motion mechanism of the X-axis and the Y-axis of the printer is different, which will cause the inertia and resistance of the X-axis and the Y-axis to be different, so that when the printing track changes rapidly on the printing platform, there will be a gap between the actual printing effect and the theoretical printing effect. Deviation, the effect of printed items is relatively rough or even locally deformed;

[0005] 2. The X-axis and / or Y-axis drive adopts more than one belt drive. Because the belt is elastic, the nozzle is prone to position deviation when changing the direction of motion, which will reduce the accuracy of the printed item; in addition, the X-axis and / or Y The shaft transmission adopts a rigidly connected transmission mechanism (such as gear transmission), and the gap between the transmission mechanisms will also cause position deviation of the nozzle when changing the direction of motion, and reduce the accuracy of printed items;

[0006] 3. The extruder and the nozzle are usually designed as an integration, which can simplify the design and reduce the cost, but the motor used in the extruder is set on the nozzle, which will increase the inertia of the nozzle, so that the acceleration and deceleration performance of the nozzle can be improved. A sharp drop will cause the speed of the printer to decrease. In addition, the propelling force of the extruder comes from the reaction force of the plastic filament. The integrated design of the extruder and the nozzle will inevitably cause the heating head to be with the extruder. The temperature of the plastic filament in the extruder will heat up, and the plastic filament in the extruder will become soft due to heating, which will cause the reaction force of the plastic filament to decrease and cannot be extruded accurately, and even the nozzle will be blocked due to the plastic filament melting, resulting in printing interruption.

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