Efficient spiral extrusion structure suitable for 3D printer

Abstract

The invention relates to an efficient spiral extrusion structure suitable for a 3D printer and relates to the field of 3D printer equipment. The efficient spiral extrusion structure comprises a hollowshaft type motor, a threading pipe, an upper fixing seat and a lower fixing seat, wherein the hollow shaft type motor is provided with a hollow rotating shaft, the two ends of the threading pipe areseparately mounted on the upper fixing seat and the lower fixing seat, two extrusion screws are symmetrically arranged outside the two sides of the threading pipe, and notches are formed in two corresponding side walls of the threading pipe; the upper and lower ends of the extrusion screws are rotatably connected with the upper fixing seat and the lower fixing seat, and the upper ends of the two extrusion screws are sleeved with a driven gear; a rotating shaft step hole is formed in the upper surface of the upper fixing seat, the lower end of the hollow rotating shaft is adapted to be insertedinto the rotating shaft step hole, and a driving gear is fixed on a shaft body of the lower portion of the hollow rotating shaft in a sleeving mode; a consumable limiting device is arranged above thehollow shaft type motor; and a cooling fan is mounted on the same sides of the upper fixing seat and the lower fixing seat. The spiral extrusion structure is small and reasonable in design, convenient to clean and maintain, and remarkably improves the extrusion effect of a spiral extrusion consumable.

Description

technical field [0001] The invention relates to the field of 3D printer equipment, in particular to a high-efficiency spiral extrusion structure suitable for 3D printers. Background technique [0002] At present, the commonly used extrusion structure of 3D printers using fused deposition modeling technology is single-gear or double-gear extrusion. Since the extrusion gear and consumables are close to linear contact, the extrusion contact area is small, the extrusion force is weak, and the extrusion gear It is easy to wear and tear, which greatly limits the improvement of the printing speed and printing quality of 3D printers. Although there is also a plan to improve the spur gear into a gear with U-shaped grooves, it does not fundamentally solve the problem due to extrusion. The small contact surface makes it difficult to extrude some materials and consumables; [0003] A Chinese utility model patent with the notification number CN206598540U discloses a 3D printer extruder ...

AI Technical Summary

Problems solved by technology

[0002] At present, the commonly used extrusion structure of 3D printers using fused deposition modeling technology is single-gear or double-gear extrusion. Since the extrusion gear and consumables are close to linear contact, the extrusion contact area is small, the extrusion force is weak, and the extrusion gear It is easy to wear and tear, which greatly limits the improvement of the printing speed and printing quality of 3D printers. Although there is also a plan to improve the spur gear into a gear with U-shaped grooves, it does not fundamentally solve the problem due to extrusion. The small contact surface makes it difficult to extrude some materials and consumables;

[0003] A Chinese utility model patent with the notification number CN206598540U discloses a 3D printer extruder that adopts thread bite extrusion. By setting a threaded shaft next to the extrusion hole of the extruder body and driving the threaded shaft to rotate by a motor, the While the threads of the threaded shaft engage the consumables in the extrusion hole and rotate, they can drive the consumables to move axially along the extrusion hole for extrusion, which improves the extrusion effect to a certain extent; but this existing spiral extrusion structure is obviously It has more advantages, and it is not as popular as the gear extrusion structure in the industry. The main reasons are the following problems: First, it cannot take into account the balance of extrusion and the compactness and rationality of the structure. One motor drives a threaded shaft to rotate because one side of the consumable is affected. force, which will affect the stability of extrusion and cause insufficient extrusion power. If multiple external motors are used to drive multiple threaded shafts, or one external motor drives multiple threaded shafts through a complex transmission structure, both will Increase the complexity of the overall structure; second, long-term use causes the extrusion effect to decline. Although the existing spiral extrusion structure increases the extrusion contact surface with the consumables, because the structure is relatively closed, the temperature will rise after the bite friction High, and the increase of debris cannot be cleaned, which affects the extrusion effect; third, the spiral extrusion will drive the consumables to rotate during the extrusion process, affecting the extrusion and printing effects

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