Feeding device for fused deposition type 3D printer and corresponding implementation method

Abstract

The invention discloses a feeding device for a fused deposition type 3D printer and a corresponding implementation method. A feeding roller is driven by a speed reducing motor with a feedback device, the maximum output torque of the motor is improved, meanwhile, the running state of the motor is judged through a position feedback device and motor driving currents, so that the maximum output torque of the motor can be matched with the mechanical property of a consumable wire, the optimal feeding performance is achieved, and whether the material blocking condition occurs can be determined in time. Meanwhile, a brand-new feeding roller pattern structure is provided, so that the friction coefficient between the consumable wire and the feeding roller is improved, and processing and production are easy. The feeding device solves the problems that a feeding device in the prior art is insufficient in feeding force and cannot judge whether materials are blocked or not.

Description

technical field [0001] The invention belongs to the technical field of 3D printers, and in particular relates to a feeding device for a fused deposition 3D printer. Background technique [0002] 3D printing technology is a rapid prototyping technology. It is based on digital three-dimensional model files, and it is a technology that forms objects such as metal, plastic, and photosensitive resin through layer-by-layer printing. It belongs to additive manufacturing. At present, 3D printers based on the principle of Fused Deposition Modeling (FDM: Fused Deposition Modeling) have become the most popular 3D printers due to their simple structure, rich variety of applicable materials, and low cost of equipment and consumables. [0003] At present, the desktop-level FDM 3D printers in the industry basically adopt the feeding device structure proposed in the utility model patent "A Wire Extrusion Device with Spring Structure for 3D Printer Nozzle" with the notification number CN2034...

AI Technical Summary

Problems solved by technology

[0009] The disadvantages of this solution are: firstly, the thrust conversion efficiency of the structure driven by a single roller is low, and a large pressing force is still required to generate sufficient thrust on the consumable filament; secondly, the elastic pressing structure is not easy to find the pressing force between different materials. The best balance point, for hard consumables, if the pressing force is too small, the tooth mark will be too shallow and cause slipping; for soft consumables, if the pressing force is too high, the consumable wire will be seriously deformed

[0010] Through the above analysis, it can be seen that there are certain technical defects in the feeding device in the prior art

Images