Manufacturing method of Three-D shaped moulding article
A technology of three-dimensional shape and manufacturing method, which is applied in the field of casting mold manufacturing, can solve the problems of inability to sinter the lower layer, bonding force (weakened adhesion force, easy to peel off, etc.), and achieve the effect of preventing the thickness from being too thick
Inactive Publication Date: 2005-12-28
MATSUSHITA ELECTRIC WORKS LTD
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[0007] Here, since the light beam L irradiated under the low-density sintering condition is determined on the premise that the thickness of the powder layer 10 is t, it is easy to occur for the powder layer 10 whose thickness is thicker than the design value t by the step difference δa. The lower layer cannot be sintered, or even if it can be sintered, only a low-density sintered layer 11L with weak bonding force (adhesion force) to the lower high-density sintered layer 11H and easy peeling can be obtained.
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[0037] The following describes in detail based on an example of an embodiment of the present invention. As a manufacturing device for producing a three-dimensional shaped object by light modeling, any type of device can be used, but the following device is used as shown in the figure. On the workbench 20 in the barrel tank 25, the supplied inorganic or organic powder material is flattened by a sliding blade to form a powder layer 10 with a specified thickness, and the above-mentioned powder layer is scanned by a scanning optical system. The sintered layer 11 is formed by irradiating a predetermined position with a beam (laser) L.
[0038]In addition, as a light beam output device that outputs the above-mentioned light beam L, a device capable of changing the scanning pitch and the scanning speed of the light beam L is used. The high-density sintered layer 11H can be formed under the high sintering conditions of narrowing the scanning pitch and slowing down the scanning speed,...
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Abstract
A method for manufacturing a three-dimensional shaped object, which is characterized by irradiating a predetermined part of a powder material layer with a beam of first intensity, sintering the powder at the place to form a high-density sintered layer, and covering the sintered layer with a new A new sintered layer integrated with the lower sintered layer is formed by sintering the powder at the specified place, and a new sintered layer integrated with the lower sintered layer is formed, and the above-mentioned actions are repeated to integrate the multi-layer sintered layer. , to produce a three-dimensional shaped object. At this time, the powder layer forming the low-density sintered layer on the above-mentioned high-density sintered layer will not be sintered to a thickness corresponding to the sintering conditions to form a low-density sintered layer with excellent adhesion.
Description
technical field [0001] The present invention relates to a method for manufacturing a three-dimensional shaped object by sintering and hardening a powder material with a beam of light, and in particular to a method applicable to multi-layer lamination of sintered layers of metal powder sintered by a laser beam to achieve integration Manufacture method of casting mold. Background technique [0002] As an optical modeling method, a method for manufacturing a three-dimensional shaped object is known. In the manufacturing method given in Patent No. 2620353 (Patent Document 1), etc., a beam is irradiated to a predetermined point of a layer of an inorganic or organic powder material to sinter (melt and adhere) the powder at that point to form a sintered layer, and Cover the sintered layer with a new powder layer, and then irradiate the powder layer with a beam of light to sinter the powder at the specified position, thus forming a new sintered layer integrated with the lower sinte...
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IPC IPC(8): B22F3/10B22F3/00B22F3/105B29C67/00
CPCB22F3/004B22F2999/00B29C64/153B33Y10/00Y02P10/25B22F10/28B22F12/90B22F10/50B22F10/36B22F10/366B22F12/67B22F10/37B22F3/10
Inventor 阿部谕不破勋垰山裕彦吉田德雄武南正孝上永修士
Owner MATSUSHITA ELECTRIC WORKS LTD