Desktop-level 3D printer

Abstract

The invention discloses a desktop-level 3D printer. The desktop-level 3D printer comprises a machine frame, a controller, a material conveying device, an X,Y and Z axis movement device, a feeding device and a spraying nozzle device, wherein the material conveying device and the X,Y and Z axis movement device are installed on the machine frame; the feeding device and the spraying nozzle device are installed on the X,Y and Z axis movement device; the material conveying device is connected with the feeding device; the feeding device is connected with the spraying nozzle device; the controller is electrically connected with the material conveying device, the X,Y and Z axis movement device, the feeding device and the spraying nozzle device. The desktop-level 3D printer can realize effective multi-color printing, a printed model is high in accuracy, the printing effect is good, and color switching nearly without errors can be achieved. Meanwhile, the environmental characteristic that materials like acrylonitrile butadiene styrene (ABS) need to be printed at a constant temperature can be realized, so that technical support is provided for clients needing to print the ABS. The products with the biggest effective printing area are included, and requirements of various clients can be met.

Description

technical field [0001] The invention relates to the technical field of 3D printers, in particular to a desktop-level 3D printer. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. 3D printing is usually achieved using digital technology material printers. It is often used to make models in the fields of mold manufacturing and industrial design, and is gradually used in the direct manufacture of some products. There are already parts printed using this technology. The technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and others. The printer controls the movement of the nozzle in the three dir...

AI Technical Summary

Problems solved by technology

[0003] Existing 3D printers mainly have the disadvantages of the following aspects: 1. When a multi-color model needs to be printed, several feeding motors are added to a head carrier, and each feeding motor controls feeding of a material. All the materials are put into a nozzle container. When A color material needs to be printed, the feeding motor of A color is controlled to work, and the other feeding motors are stopped, so that what comes out is A color, and when B color is required, control B color The feed motor of the feeder works, and the other feed motors stop. When AB color mixing is required, the feeder controlling the AB color works at the same time, and the other feeders stop. Although this can also achieve the effect of multi-color printing, but because all colors They are all in the same container, and there is a certain amount of the previous color remaining in the container. When switching colors, the color cannot be changed immediately, that is, it seems to have a multi-color effect, but compared with the actual design color position, there is an error. At the same time, this kind of printed multi-color is layered

2. In the desktop-level 3D printing industry, the printing accuracy is generally not high, because the mechanical movement precision of the equipment itself is not high, because there is no relative benchmark for its movement X, Y, and Z axes, and most of the methods are to pass the upper frame through the sheet metal structure Bending, or injection molding by opening a plastic mold, or splicing, no matter which method is used, the error requirements of concentricity, parallelism, perpendicularity, etc. must be controlled within 0.03mm, which is very Difficult, and the consistency cannot be guaranteed. The nature of the process determines that the error is relatively large, and the products produced in this way also have high requirements for installation and adjustment, time-consuming, high rework rate, and increased indirect costs. Direct feedback on the printed product The accuracy is not high

3. The effective printing area of ​​existing desktop 3D printers. Take MakerBot’s Z18 as an example. Its printing size is 305*305*457mm. Most of the existing desktop 3D printers print within the above dimensions. Left and right, if you want to print a larger size model, there are problems with low running and printing accuracy

4. In the existing technology, the Z-direction movement components generally adopt a single Z-axis movement mechanism. A screw for driving power and two optical axes for guiding are located on one side of the machine, forming a cantilever structure, and the machine runs It is easy to generate vibration when printing. With the weight of the printed product or the position of the printed product on the Z-axis platform, it will have an impact on the Z-axis platform, which will eventually affect the printing quality.

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