A heat-resistant and energy-saving fdm print head for vacuum environment

Abstract

The invention discloses a heat-resistance and energy-saving FDM print head facing a vacuum environment, the print head is composed of a connection guide, a passive heat resistor, a heater and a nozzle. In a vacuum without convection environment, a stable and energy-saving heat resistance method is adopted, the passive temperature control characteristics of high resistance heat resistance materials are used, and the optimized design of the conductive contact area is used to make the passive heat resistance quickly cool down and prevent the material from clogging. On the one hand, it solves the problem of air cooling failure in a vacuum environment and avoids the increase in system accessories and power consumption caused by liquid cooling, which is conducive to the miniaturization of equipment; on the other hand, it minimizes the heat dissipation of the heater by the heat dissipation mechanism and reduces heat loss. . The FDM print head is suitable for space additive manufacturing. Under the constraints of extra-vehicle vacuum environment and limited space resources, it can meet the extrusion molding requirements of polymers and their composite materials, metal alloys and their composite materials, inorganic non-metals and their composite materials. , which facilitates continuous, low-cost, reliable melt / melt deposition additive manufacturing in space environments.

Description

technical field [0001] The invention belongs to the field of space additive manufacturing, and in particular relates to a heat-resistant and energy-saving FDM printing head facing a vacuum environment. Background technique [0002] With the continuous development of aerospace technology, space missions such as the construction of deep space exploration bases, the expansion of space station functions, and high-resolution earth observation have increasingly increased the demand for large, lightweight, and high-strength space structures / facilities. Due to the strict mechanical conditions of the process and the limitation of high transportation costs, it is difficult to use the existing traditional operation mode of "ground manufacturing launch, space deployment application". Extravehicular on-orbit additive manufacturing, that is, additive manufacturing carried out in the extravehicular space environment of the space station, can break through the limitations of the rocket enve...

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Problems solved by technology

However, due to the lack of air heat convection and heat conduction under the constraints of a vacuum environment outside the cabin and limited space resources, this patent is not applicable to a vacuum environment

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