A continuous connection device suitable for fdm type 3d printing filament

Abstract

The invention discloses an FDM-type 3D printing filament extension device, which includes a housing with a bearing transmission structure and a filament extension structure, and a front cover and a rear cover connected to the housing by screws. A wire connection structure is provided between the housing and the front cover for melting and forming two sections of residual wire, and a power transmission structure is provided between the housing and the rear cover for providing working power for the device. The present invention adopts two groups of wire feeding wheels to feed wires respectively, each of which is controlled by a servo motor. The power of the wire feed wheel is transmitted by gears, and there are tapered openings at both ends to facilitate wire feeding. It is ensured that the two sections of material wire can reach the heating core through the wire feeding wheel accurately. The heating core is cylindrical, with an inner diameter slightly larger than the diameter of the filament. There are square holes on the outer wall of the heating core, which can prevent the two sections of filament from melting and filling the heating core and then blockage. In the present invention, one end of the push rod used for cutting the forming material wire can be inserted into the heating core, and the other end is connected to the handle, and the push rod is moved along the circular groove by external force, thereby cutting the material wire.

Description

technical field [0001] The invention relates to the field of fusion molding 3D printing, in particular to a splicing device suitable for FDM type 3D printing filaments. Background technique [0002] Materials for melt extrusion molding (FDM) are generally thermoplastic materials, such as ABS, PLA, nylon, wax, etc., and are generally fed in filamentary form. The material melts in the nozzle, and the nozzle moves along the section profile of the part and the filling trajectory, and at the same time extrudes the melted material, the material solidifies and bonds with the surrounding materials, and the shape can be formed by printing layer by layer. FDM printing does not require laser, easy to use and maintain, low cost, and relatively rapid development. [0003] In the fusion molding printing that uses the feeding tray to feed the filament, there will be a situation: after the new tray has been used for a period of time, often the filament in the last tray is not enough to pri...

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This results in a waste of material and cost

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