Heat-resistant energy-saving FDM printing head facing vacuum environment

Abstract

The invention discloses a heat-resistant energy-saving FDM printing head facing a vacuum environment. The printing head is composed of a connecting guider, a passive heat resistor, a heater, and a nozzle. In a vacuum convection-free environment, a stable energy-saving heat resistance mode is adopted, the passive temperature control characteristic of a high-heat-resistant material is utilized, and the optimal design of a conduction contact area is matched, so that the passive heat resistor is rapidly cooled, and material blockage is prevented. On one hand, the problem of air cooling failure in the vacuum environment is solved, increase of system accessories and power consumption caused by liquid cooling is avoided, and equipment miniaturization is facilitated; and on the other hand, heat of the heater is prevented from being dissipated by a heat dissipation mechanism to the maximum extent, and heat loss is reduced. The FDM printing head is suitable for space additive manufacturing, extrusion forming of polymers and composite materials of the polymers, metal alloys and composite materials of the metal alloys and inorganic nonmetal and composite materials of the inorganic nonmetal is met under the constraint conditions of an extravehicular vacuum environment and limited space resources, and continuous, low-consumption and reliable melting / melting deposition additive manufacturing in the space environment is facilitated.

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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