Detection device, three-dimensional printer and three-dimensional printing method

Abstract

The invention relates to a detection device used in a fused deposition type three-dimensional printer. The detection device comprises a mounting seat and a first detection unit, wherein the first detection unit comprises a first detection wheel, a spring, a first photoelectric sensor as well as a positioning roller and an extrusion roller rotatably mounted on the mounting seat; an axis of the extrusion roller is parallel to that of the positioning roller, and the distance between the axes is adjustable; restoring force of the spring enables the distance between the axis of the extrusion roller and the axis of the positioning roller to be reduced; a channel for wire forming is formed between a working surface of the extrusion roller and a working surface of the positioning roller wheel; the first detection wheel is coaxially connected with the extrusion roller or the positioning roller in an equal-angular-speed manner; the first detection wheel comprises a base part and a covering part circumferentially arranged along the base part; a light path of the first photoelectric sensor penetrates through a plane formed by rotating the covering part around an axis of the first detection wheel. The detection device can be used for detecting whether the three-dimensional printer has the problems of empty printing and the like or not. In addition, the invention further provides the three-dimensional printer employing the detection device and a printing method of the printer.

Description

technical field [0001] The present invention relates to a device for measuring extrusion molding equipment, the extrusion molding equipment and its molding method, in particular, to a detection device used in a fused deposition three-dimensional printer, using the detection device Three-dimensional printer and printing method thereof. Background technique [0002] A three-dimensional printer is a device based on a digital model of a three-dimensional object, which uses materials such as powdered metal or plastic to construct a three-dimensional object by layer-by-layer printing. [0003] The background technology of the patent document whose publication number is CN1216726C describes a kind of three-dimensional printer that supplies molding materials to the printing head in the form of filaments, see figure 1 , the three-dimensional printer 01 has a printing head 011, a feeding device 012, a conduit 013, and a stage 014; the feeding device 012 has a feeding tray 0121 wound ...

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Problems solved by technology

[0004] However, during the printing process, when the printing nozzle 0112 is clogged or partially clogged, the feeding rollers 0113 and 0114 are likely to slip with the molding wire, and the molten molding material cannot be extruded from the printing nozzle, or the diameter of the molten molding material cannot be extruded. If it is too small, it will cause empty printing or reduce the printing quality of three-dimensional objects; when there is a lack of forming filament in the feeding device 012, it will cause empty printing; when the feeding roller does not rotate, it will also cause empty printing

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