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A laser sintering 3D printer

A 3D printer and laser sintering technology, which is applied in the field of additive manufacturing, can solve problems such as poor sealing effect, difficulty in removing powder, and difficulty in meeting the quality of molded parts, and achieve the effect of solving difficult removal, solving sealing problems, and ensuring molding quality

Active Publication Date: 2022-04-12
SHAANXI HENGTONG INTELLIGENT MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In laser sintering technology, the sealing of the molding chamber is highly required. Most of the current technologies focus on how to set external conditions to meet the sealing of the molding chamber, such as setting a vacuum pump outside the molding chamber and using vacuum to achieve sealing; or It is to design a better sealing part or material to realize the sealing between the workbench and the forming cylinder wall; but the above-mentioned existing technologies are difficult to achieve an ideal sealing effect, and some of them are getting worse and worse due to wear and tear. , leading to a series of maintenance problems due to the need to replace the seals frequently, and more importantly, it will also cause the quality of the formed parts to be difficult to meet the requirements; due to the close contact between the workbench and the forming cylinder wall, this will lead to In the process, the powder enters the seal. If the powder needs to be replaced to process various parts, the powder must be removed. However, the existence of the seal makes it difficult to remove the powder.

Method used

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  • A laser sintering 3D printer
  • A laser sintering 3D printer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] refer to figure 1 and figure 2 , a laser sintering 3D printer, including a frame 7, an upper cylinder body 2, a lower cylinder body 5, a workbench 20, a cylinder 17, a slider 15, a powder spreading roller 19, an orientation guide rail 12, a screw nut pair 13 and a telescopic Structure 3.

[0034] The two ends of each polished rod 14 are fixed on the inside of the upper cylinder body 2 through bolt connection, and are matched by a slider 15. After the two are matched, the slider 15 can move horizontally along the polished rod 14; The two ends of the cylinder 17 are respectively connected to the upper base plate 16 and the lower base plate 18 by means of bolt connection; the two ends of the lower base plate 18 are provided with a support for supporting the powder spreading roller 19, and the support is fixedly connected with the lower base plate 18, so that The powder spreading roller 19 is fixed on the lower end of the lower bottom plate 18, so that during operation, ...

Embodiment 2

[0046] The difference between this embodiment and Embodiment 1 is that in order to meet different types of 3D printing requirements, the cross-sectional shape of the telescopic structure made of telescopic gel is circular, and correspondingly, the upper and lower cylinders are also circular forming cylinders , the telescopic structure is applied to the circular 3D printing molding cylinder, which can greatly improve the processing efficiency, and the equipment is simple.

[0047] The working mode and other structures and connection modes of this embodiment are the same as those in Embodiment 1.

Embodiment 3

[0049] The difference between this embodiment and Embodiment 1 is that the telescopic structure is composed of two sets of rigid structures inside and outside, the cross section of the rigid structure is rectangular, and the sizes of the two sets of rigid structures are different. It is connected by fitting, that is, the outer rigid structure is placed on the inner rigid structure, and the two can do telescopic movement together, and then they are fixed with the upper and lower cylinders through the fitting method; this design method makes the entire forming cylinder The stability is better.

[0050] The working mode and other structures and connection modes of this embodiment are the same as those in Embodiment 1.

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Abstract

The invention discloses a laser sintering 3D printer, which belongs to the field of additive manufacturing and includes upper and lower cylinder bodies, a workbench and a telescopic structure. The workbench is fixed inside the lower cylinder to realize the seal between the workbench and the cylinder; the upper and lower cylinders are connected by a telescopic structure to ensure that the entire molding cylinder is in a closed state. While solving the sealing problem, the quality of the parts can be guaranteed. Very good solution to the cleaning problem. Compared with the prior art, the solution adopted by the present invention has no sealing problem between the workbench and the molding cylinder, which can reduce external devices, reduce manufacturing costs, reduce waste of powder, avoid wear and tear, reduce the amount of maintenance and reduce the cost of parts. replace.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to a retractable molding cylinder for a laser sintering 3D printer. Background technique [0002] With the development of 3D printing technology, the research on laser sintering technology is getting more and more in-depth. The process of laser sintering processing parts is that the powder supplying device spreads a certain amount of powder on the workbench, and then scrapes the powder flat by the scraper, and then the laser head sinters the current layer of powder. After the processing is completed, the spiral laying Spread powder on the powder device, continue scraping, and repeat this process until the processing is completed. [0003] In laser sintering technology, the sealing of the molding chamber is highly required. Most of the current technologies focus on how to set external conditions to meet the sealing of the molding chamber, such as setting a vacuum pump outside t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/153B29C64/218B29C64/25B29C64/232B29C64/20B33Y30/00
CPCB29C64/153B29C64/218B29C64/25B29C64/232B29C64/20B33Y30/00
Inventor 黄纪霖康柱郑力铭吴春蕾康小青尹海龙
Owner SHAANXI HENGTONG INTELLIGENT MACHINE