A feeding device for a 3D printer

Abstract

The invention discloses a feeding device of a 3D (three-dimensional) printer, and relates to the field of 3D printing. The feeding device comprises a shell and a wire shelf, wherein a feeding structure is arranged in the shell; a discharging hole and a feeding hole are formed in the surface of the shell; and the discharging hole is connected to a guide pipe. The feeding device is simple in structure and convenient to operate. A gap between roller wheels can be adjusted by arranging two driving mechanisms, so that the friction force between wires and the roller wheels is adjusted; and the wirefeeding process is stable and does not slide, so that the working efficiency is improved. Meanwhile, due to the arrangement of a spherical branch joint, the wires are straightened before the wires arefed into the feeding structure, so that the machine jamming caused by wrinkled fed wires is avoided.

Description

technical field [0001] The invention relates to 3D printing, in particular to a feeding device for a 3D printer. Background technique [0002] 3D printer, also known as three-dimensional printer (3DP), is a cumulative manufacturing technology, that is, a machine of rapid prototyping technology. It is based on a digital model file and uses special wax, powdered metal or plastic to bond materials, which create three-dimensional objects by printing layers of adhesive materials. At this stage 3D printers are used to manufacture products. The technology of constructing objects by printing layer by layer. The principle of a 3D printer is to put data and raw materials into the 3D printer, and the machine will manufacture the product layer by layer according to the program. [0003] Most of the feeding mechanisms of 3D printers using FDM technology are manufactured by traditional machining or injection molding, and the processing cost and processing difficulty are relatively high...

AI Technical Summary

Problems solved by technology

[0003] Most of the feeding mechanisms of 3D printers using FDM technology are manufactured by traditional machining or injection molding, and the processing cost and processing difficulty are relatively high.

And in the process of use, we often encounter: during the printing process, due to insufficient feeding force or unstable force direction, the wire slips, the wire moves slowly, and the extrusion force is uneven, which leads to the nozzle not working normally.

[0004] Chinese patent application CN207273881U discloses a feeding device with a 3D printer, which includes a housing and a drive motor installed on one side of the housing, a material guide tube is arranged above the housing, and the material guide tube is connected to the top of the housing. The discharge port is connected, and the housing is provided with a driving gear and a driven gear. The driving gear is connected to the output shaft of the drive motor. There is a gap between the driving gear and the driven gear. The position of the gap corresponds to the discharge port. The housing There is a feed port corresponding to the position of the gap at the bottom of the bottom; there is also an elastic component in the housing, and the driven gear is rotatably mounted on the elastic component, and the driven gear moves relative to the driving gear through the elastic component. The advantages of this device are: It can effectively adjust the distance between the driving gear and the driven gear, but this device is easy to cause uneven force on the wire and cause slow wire running, and the raw material is generally stored in a roll shape, and there may be wrinkles during storage, which is easy to cause wire walking. The wire is stuck and the nozzle cannot work normally

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