Abstract: There is provided a mold including a movable side mold, a fixed side mold and a sprue bush, the sprue bush including a flow path for a cooling fluid of the fixed side mold, wherein inlet and outlet ports of the flow path for the cooling fluid are in a direct connection with a cooling tube, respectively, the cooling tube being located along a space portion provided in the fixed side mold, and wherein the space portion is in a form of an opening provided in at least one of opposed surfaces of the fixed side mold.

Abstract: There is provided a mold including a movable side mold, a fixed side mold and a sprue bush, the sprue bush including a flow path for a cooling fluid of the fixed side mold, wherein inlet and outlet ports of the flow path for the cooling fluid are in a direct connection with a cooling tube, respectively, the cooling tube being located along a space portion provided in the fixed side mold, and wherein the space portion is in a form of an opening provided in at least one of opposed surfaces of the fixed side mold.

Abstract: There is provided a method for manufacturing a three-dimensional shaped object, comprising the steps of: (i) forming a solidified layer by irradiating a predetermined portion of a powder layer with a light beam, thereby allowing sintering of the powder of the predetermined portion or melting and subsequent solidification thereof; and (ii) forming another solidified layer by newly forming a powder layer on the resulting solidified layer, and then irradiating another predetermined portion of the new powder layer with the light beam, the steps (i) and (ii) being repeatedly performed, wherein the three-dimensional shaped object is manufactured such that it has three different solidified portions of high-density, intermediate-density and low-density solidified portions in at least a part of the object, and wherein the intermediate-density solidified portion is formed to be located in a part of a surface of the three-dimensional shaped object.

Abstract: A selective laser sintering method reduces a warping deformation of a three-dimensional shaped object, the warping deformation being due to the scanning of a light beam. The manufacturing method is a method for manufacturing a three-dimensional shaped object by alternate repetition of a powder-layer forming and a solidified-layer forming, wherein a scanning of the light irradiation is divided into light beam-scannings “A” and “B”, the light beam-scanning “A” being for the light irradiation of a peripheral portion corresponding to a periphery of the three-dimensional shaped object, and the light beam-scanning “B” being for the light irradiation of an internal portion corresponding to a region of the three-dimensional shaped object, the region being located inside the periphery. In particular, the peripheral portion is subjected to a discontinuous light beam-irradiation in the light beam-scanning “A” such that an irradiation path of the light beam is divided into a plurality of sub-irradiation paths.

Abstract: There is provided a selective laser sintering method capable of reducing the bulge of the peripheral portion corresponding to the periphery of the three-dimensional shaped object. The manufacturing method according to an embodiment of the present invention includes alternate repetition of a powder-layer forming and a solidified-layer forming, the repetition comprising: (i) forming a solidified layer by irradiating a predetermined portion of a powder layer with a light beam, thereby sintering the powder in the predetermined portion or a melting and subsequently solidifying the powder; and (ii) forming another solidified layer by newly forming a powder layer on the formed solidified layer, followed by irradiation of a predetermined portion of the newly formed powder layer with the light beam, wherein a scanning of the light irradiation is divided into light beam-scannings “A” and “B”.

Abstract: There is provided a selective laser sintering method capable of reducing the trouble in chipping or breakage of the machining tool and the like. The manufacturing method according to an embodiment of the present invention is a method for manufacturing a three-dimensional shaped object by repetition of a powder-layer forming and a solidified-layer forming, the repetition including the steps of (i) forming a solidified layer by irradiating a predetermined portion of a powder layer with a light beam, thereby allowing a sintering of the powder in the predetermined portion or a melting and subsequent solidification thereof, and (ii) forming another solidified layer by newly forming a powder layer on the resulting solidified layer, followed by the irradiation of a predetermined portion of the powder layer with the light beam.

Abstract: There is provided a manufacturing method of the three-dimensional shaped object, the method being capable of suitably reducing the local raised portion which can occur during the light beam irradiation under the condition of the divided sub-irradiation paths. The manufacturing method of the present invention is performed by repetition of a powder-layer forming and a solidified-layer forming, wherein an irradiation path of the light beam is divided into a plurality of sub-irradiation paths including a short sub-irradiation path with its length being shorter than a predetermined length and a long sub-irradiation path with its length being the predetermined length or longer, and wherein an irradiation mode of the light beam is changed depending on the lengths of the sub-irradiation paths.

Abstract: There is provided a selective laser sintering method capable of reducing the bulge of the peripheral portion corresponding to the periphery of the three-dimensional shaped object. The manufacturing method according to an embodiment of the present invention includes alternate repetition of a powder-layer forming and a solidified-layer forming, the repetition comprising: (i) forming a solidified layer by irradiating a predetermined portion of a powder layer with a light beam, thereby sintering the powder in the predetermined portion or a melting and subsequently solidifying the powder; and (ii) forming another solidified layer by newly forming a powder layer on the formed solidified layer, followed by irradiation of a predetermined portion of the newly formed powder layer with the light beam, wherein a scanning of the light irradiation is divided into light beam-scannings “A” and “B”.

Abstract: A method for manufacturing a three-dimensional shaped object, comprising: (i) forming a powder layer on a base plate by a sliding movement of a squeegee blade, followed by forming a solidified layer by irradiating a predetermined portion of the powder layer with a light beam, thereby allowing sintering of the powder of the predetermined portion or melting and subsequent solidification thereof; and (ii) forming another solidified layer by newly forming a powder layer on the resulting solidified layer, and then irradiating another predetermined portion of the new powder layer with the light beam, steps (i) and (ii) being repeatedly performed, wherein machining is performed at least once on an outer surface of a shaped object precursor obtained during manufacturing, and after machining, at least one solidified layer is formed, and followed by upper face machining to remove a raised solidified portion generated at a peripheral edge of the solidified layer.

Abstract: A selective laser sintering method reduces a warping deformation of a three-dimensional shaped object, the warping deformation being due to the scanning of a light beam. The manufacturing method is a method for manufacturing a three-dimensional shaped object by alternate repetition of a powder-layer forming and a solidified-layer forming, wherein a scanning of the light irradiation is divided into light beam-scannings “A” and “B”, the light beam-scanning “A” being for the light irradiation of a peripheral portion corresponding to a periphery of the three-dimensional shaped object, and the light beam-scanning “B” being for the light irradiation of an internal portion corresponding to a region of the three-dimensional shaped object, the region being located inside the periphery. In particular, the peripheral portion is subjected to a discontinuous light beam-irradiation in the light beam-scanning “A” such that an irradiation path of the light beam is divided into a plurality of sub-irradiation paths.

Abstract: There is provided a selective laser sintering method capable of reducing the trouble in chipping or breakage of the machining tool and the like. The manufacturing method according to an embodiment of the present invention is a method for manufacturing a three-dimensional shaped object by repetition of a powder-layer forming and a solidified-layer forming, the repetition including the steps of (i) forming a solidified layer by irradiating a predetermined portion of a powder layer with a light beam, thereby allowing a sintering of the powder in the predetermined portion or a melting and subsequent solidification thereof, and (ii) forming another solidified layer by newly forming a powder layer on the resulting solidified layer, followed by the irradiation of a predetermined portion of the powder layer with the light beam.

Abstract: There is provided a selective laser sintering method capable of reducing the trouble in chipping or breakage of the machining tool and the like. The manufacturing method according to an embodiment of the present invention is a method for manufacturing a three-dimensional shaped object by repetition of a powder-layer forming and a solidified-layer forming, the repetition including the steps of (i) forming a solidified layer by irradiating a predetermined portion of a powder layer with a light beam, thereby allowing a sintering of the powder in the predetermined portion or a melting and subsequent solidification thereof, and (ii) forming another solidified layer by newly forming a powder layer on the resulting solidified layer, followed by the irradiation of a predetermined portion of the powder layer with the light beam.

Abstract: There is provided a selective laser sintering method capable of reducing the trouble in chipping or breakage of the machining tool and the like. The manufacturing method according to an embodiment of the present invention is a method for manufacturing a three-dimensional shaped object by repetition of a powder-layer forming and a solidified-layer forming, the repetition including the steps of (i) forming a solidified layer by irradiating a predetermined portion of a powder layer with a light beam, thereby allowing a sintering of the powder in the predetermined portion or a melting and subsequent solidification thereof, and (ii) forming another solidified layer by newly forming a powder layer on the resulting solidified layer, followed by the irradiation of a predetermined portion of the powder layer with the light beam.

Abstract: There is provided a manufacturing method of the three-dimensional shaped object, the method being capable of suitably reducing the local raised portion which can occur during the light beam irradiation under the condition of the divided sub-irradiation paths. The manufacturing method of the present invention is performed by repetition of a powder-layer forming and a solidified-layer forming, wherein an irradiation path of the light beam is divided into a plurality of sub-irradiation paths including a short sub-irradiation path with its length being shorter than a predetermined length and a long sub-irradiation path with its length being the predetermined length or longer, and wherein an irradiation mode of the light beam is changed depending on the lengths of the sub-irradiation paths.

Abstract: A method for manufacturing a three-dimensional shaped object, comprising: (i) forming a powder layer on a base plate by a sliding movement of a squeegee blade, followed by forming a solidified layer by irradiating a predetermined portion of the powder layer with a light beam, thereby allowing sintering of the powder of the predetermined portion or melting and subsequent solidification thereof; and (ii) forming another solidified layer by newly forming a powder layer on the resulting solidified layer, and then irradiating another predetermined portion of the new powder layer with the light beam, steps (i) and (ii) being repeatedly performed, wherein machining is performed at least once on an outer surface of a shaped object precursor obtained during manufacturing, and after machining, at least one solidified layer is formed, and followed by upper face machining to remove a raised solidified portion generated at a peripheral edge of the solidified layer.

Abstract: There is provided a method for manufacturing a three-dimensional shaped object, comprising the steps of: (i) forming a solidified layer by irradiating a predetermined portion of a powder layer with a light beam, thereby allowing sintering of the powder of the predetermined portion or melting and subsequent solidification thereof; and (ii) forming another solidified layer by newly forming a powder layer on the resulting solidified layer, and then irradiating another predetermined portion of the new powder layer with the light beam, the steps (i) and (ii) being repeatedly performed, wherein the three-dimensional shaped object is manufactured such that it has three different solidified portions of high-density, intermediate-density and low-density solidified portions in at least a part of the object, and wherein the intermediate-density solidified portion is formed to be located in a part of a surface of the three-dimensional shaped object.

Abstract: An upset forging die device and method are provided for upset-forging a raw material that is being filled in a cavity of a lower molding die at a portion between an upper punch of an upper molding die provided on a slide and a lower punch of the lower molding die provided on a bolster. The upper and lower punches are provided with an upper pin and a lower pin respectively so that a first end of each pin is protruded and withdrawn from each of end surfaces of the upper and lower punches and the pins are vertically movable in the upper and lower punches respectively, while a second end of the upper and lower pins is applied with a back-pressure.

Abstract: An oxymethylene copolymer composition which comprises an intimate mixture containing:(A) 100 parts by weight of an oxymethylene copolymer,(B) 0.01 to 2 parts by weight of an ester composed of a polyhydric alcohol having 2 to 10 carbon atoms and a higher fatty acid having 22 to 32 carbon atoms, and(C) 0.01 to 3 parts by weight of an alkaline earth metal salt of a fatty acid having 12 to 35 carbon atoms.

Abstract: A method of manufacturing a scroll member for use in a rotary compressor has the steps of heating a material which has been preformed into a substantially frusta-conical body consisting of a flat upper surface portion provided with a cylindrical projection integrally formed in the center portion thereof and a lower surface portion having a conical surface and a flat projecting surface, and forging the material by a forging apparatus. The heating step compriss a first heating at a temperature in the range from 100.degree. to 200.degree. C. and a second heating at a temperature of 440.degree. C. which is carried out after coating the material with graphite, the coating being applied to the material between the first and the second heatings.