Die, method of manufacturing die, extrusion apparatus, and method of manufacturing pellets
AssigneeThe Japan Steel Works, Ltd.
InventorsNaoki Ueda, Tomonori Hashimoto, Hiroyuki Kawano, Soichiro Matsuda, Fumiya Yamabe
Life of this patent
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Abstract
A die 6 includes a central member 6a, an injection hole formed from a surface of the central member 6a to an inside, a plurality of nozzles formed from an opposite surface of the central member 6a to the inside and connected to the injection hole, a heat source provided inside the central member 6a, and a plurality of heat insulating portions 31a provided inside the central member 6a. The plurality of heat insulating portions 31a extend from an outer peripheral side of the central member 6a toward an inner side of the central member 6a in plan view.
Claims26
A die having an extrusion surface and an injection surface on an opposite side of the extrusion surface, the die comprising:
- a first member made of a first metal material;
- an injection hole formed from a surface of the first member on a side of the injection surface to an inside of the first member;
- a plurality of nozzles formed from a surface of the first member on a side of the extrusion surface to the inside of the first member and connected to the injection hole;
- a heat source provided inside the first member;
- and
- a plurality of first heat insulating portions provided inside the first member,
- wherein the plurality of first heat insulating portions extend from an outer peripheral side of the first member toward an inner side of the first member in plan view, and
- a cross-sectional shape of each of the plurality of first heat insulating portions is such that an interval between the first heat insulating portions adjacent to each other gradually increases as approaching from the side of the extrusion surface toward the side of the injection surface.
A method of manufacturing a die, the method comprising:
- (a) preparing a first member manufactured using a 3D printer, having an extrusion surface and an injection surface on an opposite side of the extrusion surface, and made of a first metal material;
- (b) preparing a second member made of a second metal material;
- (c) preparing a plate member having a higher hardness than that of the first metal material;
- (d) joining the second member to the first member so as to surround the first member in plan view seen from a side of the extrusion surface;
- and
- (e) joining the plate member to a surface of the first member on the side of the extrusion surface,
- wherein the first member includes:
- an injection hole formed from a surface of the first member on a side of the injection surface to an inside of the first member;
- a plurality of nozzles formed from a surface of the first member on a side of the extrusion surface to the inside of the first member and connected to the injection hole;
- a heat source provided inside the first member;
- and
- a plurality of first heat insulating portions provided inside the first member, and
- wherein the plurality of first heat insulating portions extend from an outer peripheral side of the first member toward an inner side of the first member in plan view, and
- a cross-sectional shape of each of the plurality of first heat insulating portions is such that an interval between the first heat insulating portions adjacent to each other gradually increases as approaching from the side of the extrusion surface toward the side of the injection surface.
A die having an extrusion surface and an injection surface on an opposite side of the extrusion surface, the die comprising:
- an injection hole formed from the injection surface to an inside of the die;
- a plurality of nozzles formed from the extrusion surface to the inside of the die and connected to the injection hole;
- a heat source provided inside the die;
- and
- a plurality of first heat insulating portions provided inside the die,
- wherein the plurality of first heat insulating portions extend from a central portion of the die toward an outer peripheral side in plan view, and
- a cross-sectional shape of each of the plurality of first heat insulating portions is such that an interval between the first heat insulating portions adjacent to each other gradually increases as approaching from the side of the extrusion surface toward the side of the injection surface.
Dependencies are inferred from the claim text.