Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Powder feeding and spreading mechanism of laser sintering 3D printer

A 3D printer and laser sintering technology, applied in the field of 3D printing, can solve the problems affecting the leveling of powder, uneven powder, and poor quality of powder spreading, and achieve the effect of improving efficiency, uniform powder feeding, and improving powder spreading quality.

Active Publication Date: 2019-12-10
SHAANXI HENGTONG INTELLIGENT MACHINE
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of laser sintering technology is to obtain parts with high molding quality, and the quality of powder coating largely determines the molding quality. Therefore, if the quality of powder coating is not high, such as uneven powder, containing pores, etc., the parts after processing will have Defects such as stomata
Most of the powder spreading and scraping devices and methods in the prior art are difficult to achieve a good powder spreading effect. For example, after the powder spreading of many powder spreading devices, the powder is unevenly distributed on the workbench, which will affect the leveling of the powder

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Powder feeding and spreading mechanism of laser sintering 3D printer
  • Powder feeding and spreading mechanism of laser sintering 3D printer
  • Powder feeding and spreading mechanism of laser sintering 3D printer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] refer to Figure 1 to Figure 3 , a powder supply and spreading mechanism for a laser sintering 3D printer, comprising a control system 1, a powder supply cylinder 2, a level detector 7, a cylinder 3, a workbench 8, a guide rail 12 and a powder spreading and leveling mechanism 13.

[0038] In the present embodiment, the powder spreading and scraping mechanism 13 includes a frame 4, a first power unit 5, a second power unit 9, a powder supply and powder spreading cover 6, a powder outlet screen 14 and a screw powder feeding mechanism 15; The powder supply cover 6 is a cylindrical ring, and its length is consistent with the length of the workbench.

[0039] Any 1 / 4 circumference of the powder supplying and spreading cover 6 is provided with a powder outlet sieve 14, and its remaining 3 / 4 circumference is used as a scraper for scraping the powder on the workbench 8; powder In the powder supply and spreading set 6 , the powder outlet sieve 14 is evenly spread on the workben...

Embodiment 2

[0052] The difference between this embodiment and Example 1 is that the diameter of the powder outlet holes on the powder outlet sieve is 70um, the number of powder outlet holes on the powder outlet sieve is 2300, and the screw powder feeding mechanism and the powder outlet The gap between the insides of the powder supply and powder sets is 0.2mm; the purpose of this design is to adapt to the particle size of the powder. If the particle size of the powder is below 70um, the powder outlet sieve will filter the powder with a diameter greater than 70um, because in 3D printing Among them, the diameter of the powder that does not meet the requirements will reduce the printing quality; the powder output can be adjusted to adapt to the small area of ​​the workbench and improve the efficiency of powder supply.

[0053] The working mode and other structures and connection modes of this embodiment are the same as those in Embodiment 1.

Embodiment 3

[0055] The difference between this embodiment and embodiment 1 is that the diameter of the powder outlet holes on the powder outlet sieve is 120um, the number of powder outlet holes on the powder outlet sieve is 546, and the screw powder feeding mechanism and the powder outlet The gap between the insides of the powder supply and powder sets is 0.1mm; its purpose is consistent with that described in Example 3, that is, if the particle size of the powder is below 120um, the powder outlet sieve will filter powders with a diameter greater than 120um, because in 3D printing , The diameter of the powder that does not meet the requirements will reduce the printing quality; the powder output can be adjusted to adapt to a large-area workbench and improve the efficiency of powder supply.

[0056] The working mode and other structures and connection modes of this embodiment are the same as those in Embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a powder feeding and spreading mechanism. The powder feeding and spreading mechanism comprises powder feeding barrels, a levelness detector, a cylinder, a working platform, power units, guide rails, a rack, a powder feeding and spreading sleeve and a spiral powder feeding mechanism. The powder feeding and spreading sleeve is a cylindrical ring. The length of the powder feeding and spreading sleeve is equal to that of the working platform. Any one-quarter circumference of the powder feeding and spreading sleeve is provided with a powder discharge screen, and the other three-quarter circumference of the powder feeding and spreading sleeve serves as a flattening device. The powder discharge screen is provided with micro powder discharge holes. The spiral powder feedingmechanism is arranged in the powder feeding and spreading sleeve. The powder feeding and spreading mechanism provided by the invention integrates flattening and powder spreading, implements powder spreading and flattening simultaneously to improve the efficiency, feeds powder from one end of the powder feeding and spreading sleeve to the other end of the powder feeding and spreading sleeve through the spiral powder feeding mechanism, realizes uniform powder feeding and improves the powder spreading quality.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a powder supply and spreading mechanism of a laser sintering 3D printer. Background technique [0002] At present, laser sintering technology has increasingly become a research hotspot. The process of 3D printing processing parts is to spread a certain amount of powder on the workbench, and then use the scraper to level the powder, and then the laser head will sinter the current layer of powder. Powder, continue to scrape flat, repeat this process, get shaped parts. [0003] The purpose of laser sintering technology is to obtain parts with high molding quality, and the quality of powder coating largely determines the molding quality. Therefore, if the quality of powder coating is not high, such as uneven powder, containing pores, etc., the parts after processing will have Pores and other defects. Most of the powder spreading and scraping devices and methods in the prior ar...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B29C64/153B29C64/194B29C64/205B29C64/218B29C64/321B33Y30/00B33Y40/00
CPCB29C64/153B29C64/194B29C64/205B29C64/218B29C64/321B33Y30/00B33Y40/00
Inventor 郑力铭康柱黄继霖康小青吴春蕾尹海龙
Owner SHAANXI HENGTONG INTELLIGENT MACHINE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com