Selective material spreading device and material spreading method

Abstract

The invention provides a selective material spreading device which is applied to a 3D printing process. The device comprises a developing drum, a developing module, a material bed and a driving device; the developing surface of the developing drum is in a circular truncated cone shape and rotates around a first axis; the developing module is used for forming a printing material layer with a preset pattern on the developing surface of the developing drum in the rotating process of the developing drum; the material bed rotates around a third axis, is matched with the developing drum and is used for receiving a printing material layer from the developing drum; and the driving device is used for driving the developing drum and the material bed to move relatively, and the distance between the developing drum and the material bed is increased step by step or continuously increased in the printing process. The printing speed can be greatly increased, meanwhile, the method is suitable for various forming methods, and the application type is higher.

Description

[0001] This application is a divisional application filed against the invention patent application 201811619196.7. The application date of the invention patent application 201811619196.7 is December 28, 2018, and the name is selective material spreading device and material spreading method. technical field [0002] The invention relates to the technical field of 3D printing, in particular to a selective material laying device and a material spreading method. Background technique [0003] Existing 3D printing devices, such as SLS (Selective Laser Sintering), SLM (Selective Laser Sintering Melting), or 3DP (selective spraying of binders on powder beds to make models layer by layer) and other printing methods, on the workbench (or called A layer of powder material is laid with a material laying device for the powder bed, and then controlled by the control system, according to the information of the printed model, the laser beam is controlled to irradiate the laid powder layer o...

AI Technical Summary

Problems solved by technology

The material laying device lays the printing material through reciprocating motion. There is an empty stroke in the reciprocating motion, and there is a start-stop process. The material spreading speed is slow, and often only a single material can be laid, and the laying of composite materials cannot be realized generally; in addition, the above-mentioned laying Material and curing are carried out in time, further affecting the printing speed

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