Dual spray head switching device of 3D printer

Abstract

The invention discloses a dual spray head switching device of a 3D printer. The dual spray head switching device comprises a fixed support, a rotary support, a rotary shaft, a first drive motor, a second drive motor, a first spray head device, a second spray head device, upper-layer magnets and lower-layer magnets. The first motor and the second motor are both fixed to the fixed support. The firstspray head device and the second spray head device are both fixed to the rotary support. The rotary support is mounted on the fixed support through the rotary shaft. Under the action of the drive motors, the rotary support can drive the first spray head device and the second spray head device fixed to the rotary support to rotate anticlockwise and clockwise relative to the fixed support with therotary shaft as the center, the first spray head device and the second spray head device can change in the height direction, and the positions are kept unchanged in the printing process by means of attraction force between the magnets. By means of the dual spray head switching device, the effective printing space of the 3D printer adopting dual spray heads is effectively improved, the mutual influence between the spray heads is eliminated, meanwhile, locating is accurate and reliable, and printing precision is high; and the service life of each drive motor can be prolonged, energy consumptioncan be reduced, practicality is high, and usability is good.

Description

technical field [0001] The invention relates to a 3D printer component, in particular to a 3D printer double nozzle switching device. Background technique [0002] Existing 3D printers, in order to be able to print models of two colors or different materials, mostly adopt a double nozzle structure, and the two nozzles are fixed side by side with the same height to complete the 3D printing work. However, this structure has the following problems. [0003] 1. Since the heights of the two nozzles are the same, when one of the nozzles is moved to the position where it needs to work, the non-working nozzle will easily collide with the printed workpiece; at the same time, during the printing process, the non-working nozzle will hit the printing On the model that has not been cured, it will cause errors in materials and colors, and even deformation of the workpiece, which will affect the printing accuracy and shorten the life of the nozzle. [0004] 2. The overall size of the dou...

AI Technical Summary

Problems solved by technology

[0006] 1. In order to realize the transmission of motion, a large number of gears, racks and other components are used in the scheme, and gear parts are parts with complex processing and high requirements for installation and positioning. More importantly, in the gear fit, in order to ensure the gear The teeth can be meshed and disengaged smoothly. According to the requirements of mechanical design standards, a certain amount of backlash must be left between the tooth surfaces of the mating wheels. If it is transmitted through multi-stage gears, the amount of backlash will become larger after accumulation , so that the rotation of the motor cannot be completely and accurately transmitted to the end nozzle, thus affecting the actual lifting distance of the nozzle

And in actual use, even if the motor is in a static state, due to the backlash between the gear teeth, the nozzle can still vibrate slightly or vibrate up and down, which will seriously affect the printing quality of the model

[0007] 2. It may only take a few seconds for the nozzle height to be switched under the action of the motor, but during the printing process, the nozzle is squeezed and moved on the consumables, and will continue to be subjected to upward fluctuations. In order to avoid the nozzle height from appearing change, the driving motor must be continuously powered, and the force provided by the motor is used to balance the force on the nozzle. In this way, although the effective time of switching the nozzle is only a few seconds, the driving motor needs to be kept powered on throughout the printing process. Shorten the effective service life of the motor, and also cause a waste of energy

Images