Recoating machine, laminate molding apparatus including same, and laminate
A technology of lamination molding and recoating machine, applied in the direction of coating device, processing and manufacturing, additive manufacturing, etc., can solve the problems of reduced fluidity, easy clogging, clogging, etc., and achieve the effect of stable lamination molding and low cost
Pending Publication Date: 2022-04-01
KOBE STEEL LTD
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- Application Information
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Problems solved by technology
In particular, when the powder is in a skewed granular shape, unevenness on the surface of the powder may become entangled with each other, or due to static electricity between the powders, the fluidity may decrease, and clogging may occur in the slit of the recoater.
For example, the powder produced by the water atomization method tends to have a more distorted particle shape than the powder produced by the gas atomization method, and clogging easily occurs in the slit.
Method used
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Embodiment Construction
[0046] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0047]
[0048] figure 1 This is a schematic diagram of the powder molding equipment.
[0049] The powder molding device 100 includes: the molding unit 11 provided in the casing 10 ; the powder storage cabin 13 ; the recoater 155 ; and the light scanning unit 17 .
[0050] The molding part 11 has a bottom plate 21 disposed in a sliding hole 10 a formed in the casing 10 so as to be able to move up and down. The bottom plate 21 is driven up and down in the slide hole 10a by a vertical direction driving mechanism not shown. The bottom plate 21 has a rectangular shape when viewed from above the casing 10 , and its upper surface is a flat surface.
[0051] The powder storage chamber 13 is arranged above the casing 10 and stores powder materials 23 . In addition, the powder storage cabin 13 has a nozzle (not shown) that discharges the powder material 23 downw...
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A re-coater is configured such that an angle on the acute angle side formed by at least one slit inner wall surface and a slit outlet surface of a slit part is a slit inclination angle [theta] [degree], a width in a movement direction of a slit outlet formed by a pair of slit inner wall surfaces is a slit outlet width d [mm], and a shortest distance from the slit outlet to a slit inlet is a slit height h [mm]. When the width in the moving direction of the connection position of the powder storage part and the slit part is set as the storage part width Lc [mm], the slit outlet width d and the slit inclination angle theta satisfy the following formula. D is greater than or equal to 0.0024 * (theta-75 degrees) 2 + 4.5, and d is less than or equal to Lc-2h / tan theta.
Description
technical field [0001] The present invention relates to a recoater, a lamination molding device equipped with it, and a lamination molding method. Background technique [0002] A method of manufacturing a three-dimensional model by layering three-dimensional CAD (Computer Aided Design) data on a divided layer and layering another layer on top of it is known as an "Additive Manufacturing" technique. According to this technology, as long as 3D CAD data is available, complex shapes can be easily manufactured without a mold. [0003] As one of such molding methods, there is a Powder Bed Fusion (PBF: Powder Bed Fusion) method in which a laminated structure is molded by selectively heating spread metal material powder to melt, solidify, or sinter the powder. Among powder bed fusion bonding methods, a laser beam method (SLM: Selective Laser Melting) using a laser beam as a heating source is widely used. [0004] A layered molding device of a powder bed fusion bonding method typic...
Claims
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IPC IPC(8): B22F12/00B22F10/28B22F12/50B22F10/80B33Y10/00B33Y30/00B22F9/08
CPCB29C64/153B29C64/205B33Y10/00B33Y30/00B22F12/67B22F10/28B22F12/52B22F10/37Y02P10/25B22F12/50
Inventor 初田光岭山田岳史黑泽瑛介
Owner KOBE STEEL LTD