A liquid raw material generating device for three-dimensional printing and its control method

Abstract

The invention discloses a liquid raw material generating device for three-dimensional printing and a control method thereof. The device is mainly composed of a heating unit used for generating liquid raw material, and used for controlling the communication between the inner space of the heating unit and the external atmosphere or a negative pressure device. The opening and closing device 1. The opening and closing device used to control the solid raw material to enter the inner space of the heating unit 2. The air pressure sensing device, the liquid level sensing circuit, and the temperature sensing circuit. Its beneficial effects: avoid the problem of leakage of liquid raw materials from the extrusion head from the entrance of solid raw materials in the existing FDM three-dimensional printing technology; realize continuous supply of solid raw materials in the process of three-dimensional printing, which is beneficial to the printing of large-volume parts; It can produce both liquid droplets and continuous liquid raw material flow; it can realize flexible control of liquid raw material fluid; it can realize real-time monitoring of parameters such as volume and temperature of liquid raw material in the heating chamber; it has high implementability and practicability , is widely applicable. The present invention represents a substantial advance.

Description

technical field [0001] The invention relates to a liquid raw material generating technology in three-dimensional printing technology, in particular to a liquid raw material generating device for three-dimensional printing and a control method thereof, belonging to the technical field of additive manufacturing. Background technique [0002] 3D printing technology first originated in the United States at the end of the 19th century, and was perfected and commercialized in Japan and the United States until the 1970s and 1980s. Common mainstream 3D printing technologies, such as stereolithography (StereoLithography Apparatus, SLA), fused deposition manufacturing (Fused Deposition Modeling, FDM), selective laser sintering (Selecting Laser Sintering, SLS), three-dimensional powder bonding (Three DimensionalPrinting and Gluing, 3DP), was commercialized in the United States in the 1980s and 1990s. In technologies that realize 3D printing by stacking molten raw materials, such as co...

AI Technical Summary

Problems solved by technology

These methods of producing metal droplets all produce metal droplets by applying pressure and utilizing the characteristics of the fluid, and can also produce continuous liquid metal flow, but cannot continuously add solid raw materials during the working process, which will bring problems to some printing situations. Inconvenient, such as printing large metal parts; and there are difficulties in monitoring the liquid level of liquid metal in the micro furnace / crucible

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