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Solid propellant 3D printing and forming method based on ultraviolet light solidification

A solid propellant, 3D printing technology, used in 3D object support structures, metal processing equipment, manufacturing tools, etc., can solve problems such as the inability to meet the molding requirements of composite materials with high solid content, and achieve poor fluidity and abundant ultraviolet light sources. , the effect of avoiding safety hazards

Inactive Publication Date: 2017-10-24
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing 3D printing technology cannot meet the molding requirements of composite materials with high solid content, especially thermosetting solid propellants

Method used

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  • Solid propellant 3D printing and forming method based on ultraviolet light solidification
  • Solid propellant 3D printing and forming method based on ultraviolet light solidification
  • Solid propellant 3D printing and forming method based on ultraviolet light solidification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Epoxy acrylate photosensitive resin is selected as the auxiliary adhesive, and it is used in combination with the main adhesive of hydroxyl-terminated polybutadiene. The oxidant is ammonium perchlorate, metal aluminum powder is used as the solid fuel, and the curing agent is TDI. The mass percentages of the above components are: 5% photosensitive resin, 12% hydroxyl-terminated polybutadiene, 72% ammonium perchlorate, 5% aluminum powder, 3% TDI curing agent, and 3% other components. Weigh the above-mentioned materials, use a kneader to mix evenly, and use a screw extruder to send the mixed materials to the forming nozzle for continuous extrusion. The pre-designed propellant three-dimensional model is input into the computer, and the slicing software is used for slicing processing. The 3D printing software system controls the extrusion nozzle to perform three-dimensional movement according to the path planned by the slicing software, and the extruded materials are continuou...

Embodiment 2

[0041] Epoxy acrylate type photosensitive resin is selected as the auxiliary adhesive, and it is used in combination with the main adhesive of hydroxyl-terminated polybutadiene. The oxidant is ammonium perchlorate, metal aluminum powder is used as the solid fuel, and the curing agent is TDI and MAPO. ratio mixture. The mass percentages of the above components are: photosensitive resin 5%, hydroxyl-terminated polybutadiene 12%, ammonium perchlorate 72%, aluminum powder 5%, curing agent 3.0%, and other components 3%. Weigh the above-mentioned materials, use a kneader to mix evenly, and use a screw extruder to send the mixed materials to the forming nozzle for continuous extrusion. The pre-designed propellant three-dimensional model is input into the computer, and the slicing software is used for slicing processing. The 3D printing software system controls the extrusion nozzle to perform three-dimensional movement according to the path planned by the slicing software, and the ext...

Embodiment 3

[0043] Epoxy acrylate photosensitive resin is selected as auxiliary adhesive, which is used in combination with polyether main adhesive. Ammonium perchlorate is used as oxidant, metal aluminum powder is used as solid fuel, and IPDI is selected as curing agent. The mass percentages of the above components are: 7% of photosensitive resin, 10% of polyether, 72% of ammonium perchlorate, 5% of aluminum powder, 2.0% of curing agent and 4% of other components. Weigh the above-mentioned materials, use a kneader to mix evenly, and send the mixed materials to the forming nozzle by a piston extruder for continuous extrusion. The pre-designed propellant three-dimensional model is input into the computer, and the slicing software is used for slicing processing. The 3D printing software system controls the extrusion nozzle to perform three-dimensional movement according to the path planned by the slicing software, and the extruded materials are continuously spread on the printing platform. ...

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Abstract

The invention discloses a solid propellant 3D printing and forming method based on ultraviolet light solidification. Photosensitive resin, a main adhesive, a solidification agent, an oxidizing agent, solid fuel and other raw materials are uniformly mixed, the materials are conveyed to an extrusion spray head to be extruded continuously, ultraviolet light is conveyed to the extrusion spray head, and the extruded materials are subjected to continuous solidification. 3D printing software is adopted to control the movement path of the extrusion spray head and the extrusion speed of the materials, stacking is performed layer by layer, and solidification is performed layer by layer; and finally, a formed sample is further subjected to heat preservation and solidification in a constant temperature oven. By means of the method, thermosetting solid propellants of any shape can be prepared safety at a low temperature and low pressure, and the method has the characteristics of being safe in process, free of a forming mold and wide in application range.

Description

technical field [0001] The invention relates to a molding and processing method of a propellant, in particular to a 3D printing molding method of a solid propellant based on ultraviolet light curing. Background technique [0002] The traditional thermosetting composite solid propellant is mainly manufactured by casting molding process, which is to mix the raw materials such as liquid main binder, curing agent, solid oxidant and metal fuel, and then directly cast them in the mold or the engine casing, and then pass heat preservation After a long time curing, the finished solid propellant is obtained. The solid propellant that needs to be demolded has certain restrictions on the shape, and it is very difficult to form the particularly complex special-shaped grain by this process. Therefore, the casting process cannot satisfy the molding preparation of some complex shapes of solid propellants. [0003] UV curing 3D printing is a principle based on traditional printing, using ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/124B33Y10/00B33Y70/00
CPCB33Y10/00B33Y70/00
Inventor 蔺向阳屈明和曹宇鹏李翰郑文芳樊黎霞潘仁明
Owner NANJING UNIV OF SCI & TECH
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