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Negative pressure-based device and method for manufacturing porous textures by laser sintering and quick molding

A porous structure and laser sintering technology, which is applied in the direction of improving process efficiency and energy efficiency, can solve problems such as powder clogging, achieve fast forming speed, high precision and high forming efficiency, and guarantee the effect of porosity and pore size

Inactive Publication Date: 2011-04-27
NANJING HONNY 3 DIMENSIONAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to achieve the above purpose, the present invention provides a device for manufacturing porous structures based on negative pressure laser sintering rapid prototyping, which can effectively solve the problem of powder blockage during selective laser sintering rapid prototyping for porous structures

Method used

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  • Negative pressure-based device and method for manufacturing porous textures by laser sintering and quick molding

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with specific examples.

[0025] see figure 1 and figure 2 As shown, the device of the present invention includes: an X-Y working platform, on which a pair of fixed guide rails 6 are arranged in parallel, and the guide rails 6 are provided with a powder spreading roller 1 and a powder spreading groove 2 which move back and forth along the guide rails 6, and powder spreading The bottom of the tank 2 is provided with a long and narrow opening, and the opening and closing thereof is automatically controlled by an electrical device.

[0026] X-Y working platform is provided with forming cylinder 16, and forming cylinder 16 inside is provided with the forming workbench that can move along the vertical direction, and forming workbench is made up of mesh plate 3 and support frame 5 densely covered with small holes; Forming workbench support frame 5 The lower surface is fixed with a negative pressure chambe...

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Abstract

The invention relates to a negative pressure-based device and a negative pressure-based method for manufacturing porous textures by laser sintering and quick molding. The device comprises an X-Y workbench, wherein a pair of guide rails is arranged on the workbench, and the guide rails have a powder spreading roller and a power spreading groove which can move reciprocally along the guide rails; the X-Y workbench is provided with a molding tank, and a molding workbench capable of moving vertically is arranged in the molding tank; the molding workbench consists of a screen with holes distributed densely and a carriage, and a negative pressure chamber is formed on the lower surface of the molding workbench; the bottom end of the negative pressure chamber is connected with a screw and a servo motor in turn; an absorption tube is communicated with the negative pressure chamber through an opening; and the other end of the absorption tube is connected with a filter and a vacuum pump in turn. In the invention, based on a negative pressure absorption principle, powder which is not sintered on each layer is removed and recycled through an absorption tube; and through layer-by-layer absorption, the powder which is not sintered and solidified is cleaned completely, while the sintered and solidified powder is continuously stacked and overlaid to form parts, so that the manufacturing of the porous texture with an aperture of less than 1mm is realized through selective laser sintering and quick molding.

Description

technical field [0001] The invention belongs to the field of rapid prototyping, and in particular relates to a device and method for manufacturing porous tissue by laser sintering rapid prototyping based on negative pressure. Background technique [0002] Rapid prototyping technology is a rapid prototyping technology based on the principle of material accumulation. Selective laser sintering (SLS) was successfully developed in 1989 by C.R.Dechard of the University of Texas at Austin. The SLS process is formed by using powdered materials. The material powder is spread on the upper surface of the formed part and flattened; a high-intensity CO2 laser is used to scan the part section on the new layer just laid; the material powder is in high-intensity It is sintered together under laser irradiation to obtain the section of the part, and bonded with the formed part below; when a section of a layer is sintered, a new layer of material powder is spread, and the section of the lower...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F3/11
CPCY02P10/25
Inventor 王伊卿赵万华张庆刘志刚丁玉成卢秉恒
Owner NANJING HONNY 3 DIMENSIONAL TECH
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