A powder tank for selective laser sintering with negative pressure suction function
A laser selective sintering and functional technology, which is applied in the direction of improving energy efficiency and process efficiency, can solve the problem of low density of metal direct forming parts, achieve overall quality improvement, wide application range, and increase the effect of density
Active Publication Date: 2016-04-27
XI AN JIAOTONG UNIV
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Problems solved by technology
[0003] Aiming at the problem that the density of powder-coated laser metal direct forming parts is not high, the present invention proposes a powder-spreading auxiliary device for laser selective sintering that can effectively improve the density of formed parts. The action of the air flow and the powder compacts the powder, and the formed parts are sucked and fixed, so as to improve the forming quality of the metal parts
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[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0014] refer to Figure 1-Figure 2 , a powder trough for selective laser sintering with the function of sucking negative pressure, comprising four side plates 4 and a bottom plate 2, the side plates are connected with bolts 1 along the upper periphery of the bottom plate 2 to form a five-sided open cubic powder trough; four sides A large number of small holes 11 with a diameter of 2-5 mm are punched on the board and the supporting board to penetrate the two sides of the board, and its function is to provide a ventilating passage for air extraction; Attached with the inside powder sieve 5 and the plane powder sieve 6 whose pore diameter is smaller than the powder diameter, powder can be prevented from entering the small holes of the four walls of the powder trough and the powder trough supporting plate.
[0015] For the side plate, th...
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Abstract
The invention discloses a powder groove with a vacuumizing function for a selective laser sintering. The powder groove comprises four side plates and a bottom plate, wherein the side plates are connected along the periphery of the upper surface of the bottom plate so as to form a cubic powder groove with five open surfaces. The powder groove is characterized in that the side plates and a support plate are provided with two surfaces of small-hole cut-through plates, wherein the side plates have multiple porous regions; the outer wall of each side plate is respectively provided with a lateral groove plate; the inner wall of each lateral groove plate is provided with at least two transverse rectangular grooves at equal intervals from top to bottom; each rectangular groove is opposite to one porous region of each side plate and is provided with a bleeder hole; the lower surface of the support plate is connected with a lower groove plate; the inner wall of the lower groove plate is provided with a groove which is used for covering a small hole of the support plate and is provided with a bleeder hole; an inside powder sieve is adhered to the inner wall of each side plate; a planar powder sieve is adhered to the inner wall of the support plate; the pore diameters of the powder sieves are smaller than the powder diameter.
Description
technical field [0001] The invention relates to a laser metal direct forming technology, in particular to a laser selective sintering forming auxiliary device for manufacturing parts by powder laying. technical background [0002] 3D printing technology has been widely used in product research and development and direct forming of product parts. Laser selective sintering is an important research field of 3D printing technology. Laser selective sintering uses laser as energy to heat the powder to melt and bond the powder. Together with the forming method, the use of laser selective sintering to form parts has many advantages: no mold is required for forming, parts that do not require high precision can be directly formed, no follow-up processing is required, and research and development time can be effectively shortened. Mass production has great advantages, etc.; however, laser selective sintering also has its own disadvantages: the density of the formed part needs to be imp...
Claims
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IPC IPC(8): B22F3/105
CPCY02P10/25
Inventor 李涤尘延斯·甘斯特张连重田小永
Owner XI AN JIAOTONG UNIV