A method and device for circulating and purifying impurity gas in a low positive pressure sealing molding room

A gas circulation and impurity gas technology, applied in chemical instruments and methods, separation methods, measuring devices, etc., can solve the problems of threatening the personal safety of operators, filter clogging, and short working life, so as to improve collection efficiency and reduce filtration. Effects of net abrasion and reduction of accumulation clogging
CN106975278BActive Publication Date: 2022-07-26SOUTH CHINA UNIV OF TECH
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2022-07-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method and a device for purifying impurity gas in a low positive pressure sealed molding chamber; the device comprises a molding chamber and a gas circulation purification system, and the gas circulation purification system is controlled by a computer; two ends of the molding chamber are respectively provided with gas circulation Outlet A and gas circulation inlet B; the gas circulation purification system includes a circulating gas circuit composed of a gas uniform distribution device, a filter box, an activated carbon filter box, a circulating air pump, a differential pressure sensor, etc.; the two pressure guide ports of the differential pressure sensor are respectively connected On the outlet pipeline of the filter box, on the inlet pipeline of the circulating air pump, and on the inlet pipeline of the gas distribution device; this device has higher purification efficiency, and can quickly adjust the oxygen content, air pressure and metal dust particle concentration in the molding chamber environment. Item index, the degree of purification of metal dust particles in the molding room environment is high.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of selective laser melting (Selective Laser Melting, SLM) additive manufacturing, in particular to a method and a device for purifying impurity gas in a low positive pressure sealing molding chamber. Background technique

[0002] With the development of Selective Laser Melting (SLM) technology, SLM has been able to directly manufacture metal parts with metallurgical bonding, dense organization, high dimensional accuracy and good mechanical properties. Metal parts with internal structures have broad application prospects and become a research hotspot in the field of additive manufacturing today.

[0003] It is very important to control the gas environment in the sealing molding room during the SLM process. The key indicators are oxygen content, air pressure, and metal dust particle concentration. Among them, the oxygen content is directly related to the forming quality of the formed metal parts, and has a great influe...

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