3D (Three Dimensional) printer capable of changing spraying heads for printing

Abstract

The invention discloses a 3D (Three Dimensional) printer capable of changing spraying heads for printing. The 3D printer comprises a material feeding device, a heating and clamping device (1), a driving device, a positioning device, a base (5), spraying heads (10) and a control system, wherein the heating and clamping device comprises a heating device and an electromagnet; a material inlet (7) is formed in the top part of the heating and clamping device; the driving device comprises a driving motor (2) and a driving gear (3); the positioning device comprises a positioning motor (6) and a positioning pin (9); the base is provided with material outlets, positioning holes and a rack of which the two ends are provided with position switches (4); the base is connected with the heating and clamping device; the spraying heads comprise a spraying head I and a spraying head II; and the control system is connected with the material feeding device, the driving device, the positioning device and the spraying heads. According to the 3D printer disclosed by the invention, the free change of the spraying heads is realized; processing materials with different diameters are sprayed at different working conditions; the processing efficiency is improved; the raw materials are saved; the production cost is lowered; meanwhile high-precision change of the spraying heads is realized through the positioning device; and the processing precision of parts is improved.

Description

technical field [0001] The invention relates to the technical field of printing equipment, in particular to a 3D printer, in particular to a 3D printer capable of printing with replaceable nozzles. Background technique [0002] 3D printer, also known as three-dimensional printer, is a cumulative manufacturing technology, that is, a machine of rapid prototyping technology. It is based on digital model files and uses special wax, powdered metal or plastic and other bondable materials. Three-dimensional objects are manufactured by printing layers of adhesive materials. The basic principle is that by putting data and raw materials into the 3D printer, the machine will build the product layer by layer according to the program, and the printed product can be used immediately. . 3D printers used to be used to manufacture models in mold manufacturing, industrial design and other fields, and are now gradually used for direct manufacturing of some products. The biggest difference be...

AI Technical Summary

Problems solved by technology

[0003] However, traditional 3D printers can usually only eject materials with one diameter, but in the whole printing process, the accuracy requirements of each part are different, especially when printing the base, the required accuracy is not high, so it is hoped that Print at a faster speed to shorten the entire printing time, thereby improving processing efficiency; when it is necessary to squeeze different parts of the product, if the size of the nozzle diameter cannot be adjusted, some materials will accumulate during extrusion, so not only It is a waste of materials, and it is difficult to ensure the accuracy of the finished product after molding; in addition, in the prior art, replacing the nozzle is used to extrude raw materials of different materials or colors, so that products with different materials and rich colors can be printed, but replacing the nozzle The precision is not high, and the lack of effective positioning device reduces the machining accuracy of the parts

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