# US 11,999,088 B2 · Insert sintered part and manufacturing method for same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,999,088 B2 - Document ID: US11999088B2 - Status: Granted - Kind: B2 - Application number: 17/788,497 - Filed: 2021-01-25 - Published: 2023-02-02 - Granted: 2024-06-04 - Earliest claimed: 2020-01-31 - Assignees: Diamet Corporation - Applicants: Diamet Corporation - Inventors: Shinichi Takezoe; Tsuneo Maruyama; Hideo Sakai - Web page: https://patentgrep.com/patent/US11999088B2 ## CPC - B29C 45/1459: {Coating annular articles} - B22F 5/10: of articles with cavities or holes, not otherwise provided for in the preceding subgroups - B22F 7/06: of composite workpieces or articles from parts, e.g. to form tipped tools {(B22F7/002 takes precedence)} - B22F 7/08: with one or more parts not made from powder {(B22F7/062 takes precedence)} - B29C 45/14065: {Positioning or centering articles in the mould} - B29C 45/14778: {the article consisting of a material with particular properties, e.g. porous, brittle} - B29C 45/26: Moulds - B29C 45/2616: {having annular mould cavities} - F16C 33/128: {Porous bearings, e.g. bushes of sintered alloy} - F16C 33/145: {of sintered porous bearings} - B29K 2705/00: Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts - B29L 2031/04: Bearings - F16C 2204/20: Alloys based on aluminium - F16C 2208/00: Plastics; Synthetic resins, e.g. rubbers - F16C 2220/04: by injection-moulding - F16C 2226/80: with splines, serrations or similar profiles to prevent movement between joined parts - F16C 2326/01: Parts of vehicles in general - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES ## Abstract By using a forming die having a fixed die and a movable die moving along a parting surface on the fixed die and by moving the movable die along the parting surface, to press and hold a sintered part between the movable die and the fixed die, to form a cavity around the sintered part except parts which abut on the fixed die and the movable die by the forming die, and to fill the cavity with melted material which becomes an exterior part, so that the sintered part and the exterior part are integrated by insert molding. ## Claims ### Claim 1 A method of manufacturing an insert sintered part comprising: a sintered part-forming step of forming a sintered part having a first end part and a second end part by powder molding; and an insert-molding step of forming an insert sintered part in which an exterior part is integrated into an outer peripheral part of the sintered part, wherein a forming die used in the insert-molding step includes a fixed die and a movable die, wherein there is a parting surface along which the fixed die and the movable die abut each other, the insert-molding step has: a die-clamping step in which the sintered part is held between the fixed die and the movable die, the movable die is moved along the parting surface, and the sintered part is pressed against the fixed die by the movable die to form a cavity around the sintered part such that said forming die covers a region of the sintered part with a gap except for a portion where the first end part abuts the fixed die and a portion where the second part abuts the movable die; and a filling step of filling the cavity with a melted material being formed into the exterior part after the die-clamping step, and the parting surface is formed along a movement direction of the movable die in the die-clamping step. ### Claim 2 (depends on 1) The method of manufacturing an insert sintered part according to claim 1, wherein in the sintered part-forming step, an outer-inclined surface on an outer peripheral surface of at least either one of an end part between the first end part and the second end part is formed to be reduced in a diameter toward an end surface of the end part, and a concave part having a first tapered surface which abuts the outer-inclined surface is formed on at least one of the fixed die and the movable die, and the first tapered surface is made to abut the outer-tapered surface in the die-clamping step. ### Claim 3 (depends on 2) The method of manufacturing the insert sintered part according to claim 2, wherein the sintered part is a sintered bearing having one penetrating hole which penetrates the first end part and the second end part. ### Claim 4 (depends on 1) The method of manufacturing an insert sintered part according to claim 1, wherein in the sintered part-forming step, one penetrated hole which penetrates the first end part and the second end part is formed and an inner-inclined surface is formed in the penetrated hole to be increased in a diameter toward at least either one end surface of one end part between the first end part and the second end part, a protruded part having a second tapered surface which abuts the inner-inclined surface is formed on at least one of the fixed die and the movable die, and in the die-clamping step, the second tapered surface is made to abut the inner inclined surface. ### Claim 5 (depends on 4) The method of manufacturing the insert sintered part according to claim 4, wherein the sintered part is a sintered bearing. ### Claim 6 (depends on 1) The method of manufacturing the insert sintered part according to claim 1, wherein the sintered part is a sintered bearing having one penetrating hole which penetrates the first end part and the second end part.