Preparation method of polyethersulfone powder consumables for laser sintering forming 3D printing

Abstract

The invention provides a preparation method of polyethersulfone powder consumables for laser sintering and forming 3D printing, which comprises the following steps: (1) placing polyethersulfone into a silo in a low-temperature pulverizer, and the liquid contained in the silo Nitrogen is used to cool polyethersulfone to -130°C to -196°C; (2) pulverize the cooled polyethersulfone in step (1) at a pulverization temperature of -110°C to -196°C to obtain polyethersulfone primary powder; (3) After sieving the primary polyethersulfone powder in step (2), it is dried at a gradient temperature starting at 100°C, with a heating frequency of 2°C / min to 8°C / min, and then heated to 130°C and then dried at a constant temperature for 0.5h ~2h; (4) Put the pulverized powder in step (3) into a grinder, and grind it sufficiently to obtain the crude polyethersulfone product; (5) Gradiently raise the temperature of the crude polyethersulfone product in step (4) at 100°C Drying, the heating frequency is 2°C / min to 8°C / min, and after the temperature is raised to 150°C, it is dried at a constant temperature for 0.5h to 1h to obtain laser sintering molding 3D printing polyethersulfone powder consumables.

Description

technical field [0001] The invention relates to the field of rapid prototyping, more specifically, the invention relates to a preparation method of laser sintering forming 3D printing polyethersulfone powder consumables. Background technique [0002] As an emerging material processing and molding technology, 3D printing technology has become one of the important symbols of the third industrial revolution. 3D printing originated from the late 1970s to the early 1980s. Its key technical advantage is the use of digital means to quickly manufacture complex structural products of different materials. It can be applied to some high-precision advanced manufacturing fields, and the process is energy-saving and material-saving. . Traditional subtractive manufacturing technology generally uses methods such as cutting, grinding, corrosion and melting to obtain products of specific shapes, and then assembles and welds them to form products. The production cycle is long, the process is ...

AI Technical Summary

Problems solved by technology

Repeated sieving and crushing increase the cost, so it is necessary to develop a method for preparing polyethersulfone powder consumables, so that after cryogenic crushing, the crushed powder is subjected to another grinding and drying process to prepare a polyethersulfone powder suitable for 3D High temperature resistance of printing technology, good compatibility with impregnating resin, uniform particle size, no need to add binder polyethersulfone consumables, can be easily and quickly formed into precision, special-shaped, complex, high mechanical strength, stable size Parts with good performance, and can be used to prepare many parts of today's unmanned aircraft, micro robots, such as micro gears, micro crankshafts, micro connecting rods

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