Device for on-track 4D printing of thermosetting shape memory polymers

Abstract

The invention discloses a device for on-track 4D printing of thermosetting shape memory polymers, and relates to the technical field of printing. The problem that an existing 4D printing device cannotwork on track is solved. The device for on-track 4D printing of the thermosetting shape memory polymers comprises a printing platform, a printing spray-head, a driving device, a feeding device, a curing device and a three-axis motion device, wherein the printing spray-head is adapted to spray thermosetting materials; the driving device is connected with the printing spray-head and drives the printing spray-head to spray the thermosetting materials, and the driving device is a piezoelectric vibration device; the feeding device comprises an injection pump and is connected with the printing spray-head through a feeding pipe; the curing device is fixedly connected with the printing spray-head, and the curing device heats the thermosetting materials sprayed on the printing platform by the printing spray-head in real time; and the three-axis motion device drives the printing spray-head, the curing device and the printing platform to move in the three-dimensional direction. The device for on-track 4D printing of the thermosetting shape memory polymers solves the problem that printing cannot be performed in weightlessness environment, improves the flexibility of a space station, and effectively reduces the dependence of the space station on ground supply.

Description

technical field [0001] The invention relates to the field of printing technology, in particular to a device for on-rail 4D printing of thermosetting shape memory polymers. Background technique [0002] Thermosetting materials are widely used in the aerospace field due to their advantages of anti-oxidation, anti-radiation, and stable performance. At present, the printing method of thermosetting materials mainly relies on stereolithography molding. This molding method uses laser to cure the surface layer of liquid photosensitive resin, and then the production platform is lowered by a certain distance, and then the next layer of photosensitive resin is cured. The final product is formed repeatedly in this way. The printing platform needs to be in direct contact with the resin tank, and the liquid photosensitive resin needs to gradually descend with the printing platform to ensure that the laser can continuously cure the photosensitive resin on the upper surface. However, this m...

AI Technical Summary

Problems solved by technology

At present, the printing method of thermosetting materials mainly relies on stereolithography molding. This molding method uses laser to cure the surface layer of liquid photosensitive resin, and then the production platform is lowered by a certain distance, and then the next layer of photosensitive resin is cured. The final product is formed repeatedly in this way. The printing platform needs to be in direct contact with the resin tank, and the liquid photosensitive resin needs to gradually descend with the printing platform to ensure that the laser can continuously cure the photosensitive resin on the upper surface. However, this method is not suitable for the extreme environment of microgravity in space. It is difficult for the resin to follow the downward movement of the printing device

At present, 4D printing is a new technology formed by adding a time dimension on the basis of 3D printing, which enables the printed shape-memory polymer products to realize self-driving or self-deformation under specific excitation, and the prepared shape-memory polymer products can be As a functional part to replace complex electromechanical structures, however, self-driven or self-deformable shape memory products are prepared on the ground and transported to on-orbit spacecraft. There are no reports of on-orbit 4D printing devices.

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