# US 2013/0252012 A1 · Powder metal axial and radial retention features for molding applications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0252012 A1 - Document ID: US20130252012A1 - Status: Published application - Kind: A1 - Application number: 13/821,704 - Filed: 2011-10-21 - Published: 2013-09-26 - Earliest claimed: 2010-10-27 - Assignees: Gkn Kinter Metals, LLC. - Inventors: Donald D. Cooper; John P. Mohr; Joel H. Mandel - Web page: https://patentgrep.com/patent/US20130252012A1 ## CPC - B22F 5/10: of articles with cavities or holes, not otherwise provided for in the preceding subgroups - B22F 3/03: Press-moulding apparatus therefor - B22F 5/007: {of moulds} - Y10T 428/12014: having metal particles - 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 - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A powder metal insert for overmolding and method of making it has retention features on the outer surface extending from each end and angularly offset from one another. ## Claims ### Claim 1 A sintered powder metal insert for being overmolded by an overmolding material, comprising a body of sintered powder metal, the body having opposed end surfaces and an outer surface extending between the end surfaces, the outer surface having one set of retention features formed in it as spaced apart recesses extending from one end surface toward the other end surface and terminating short of the other end surface and having a second set of retention features formed in the outer surface as spaced apart recesses extending from the other end surface toward the one end surface and terminating short of reaching the one end surface, the first set being angularly offset from the second set so that the features of the first set are angularly between the features of the second set. ### Claim 2 (depends on 1) A sintered powder metal insert as claimed in claim 1, wherein the features of each set extend axially a length so as to terminate short of axially overlapping the features of the other set. ### Claim 3 (depends on 1) A sintered powder metal insert as claimed in claim 1, wherein the features extend longitudinally further than circumferentially. ### Claim 4 (depends on 1) A sintered powder metal insert as claimed in claim 1, wherein each feature has a radially inward surface that is generally in the shape of a section of a cylinder. ### Claim 5 (depends on 1) A sintered powder metal insert as claimed in claim 1, wherein each feature forms an end wall where it terminates at a blind end. ### Claim 6 (depends on 1) A sintered powder metal insert as claimed in claim 1, wherein the outer surface is generally cylindrical. ### Claim 7 (depends on 7) A sintered powder metal insert as claimed in claim 7, wherein the end wall is in a plane that is perpendicular to the axial direction. ### Claim 8 (depends on 1) A sintered powder metal insert as claimed in claim 1, wherein the features of the first set do not intersect each other. ### Claim 9 (depends on 1) A sintered powder metal insert as claimed in claim 1, wherein the features of the second set do not intersect each other. ### Claim 10 (depends on 1) A sintered powder metal insert as claimed in claim 1, wherein the insert has a bore. ### Claim 11 (depends on 11) A sintered powder metal insert as claimed in claim 11, wherein the bore has a non-round shape so as to be driven by a shaft. ### Claim 12 (depends on 1) A sintered powder metal insert as claimed in claim 1, wherein the features of the first set do not intersect the features of the second set. ### Claim 13 (depends on 1) A method of making a sintered powder metal insert as claimed in claim 1, including the step of compacting powder metal in a compaction tool set including upper tooling comprising an upper die and lower tooling comprising a lower die, wherein the one set of features is formed by one of the dies and the other set of features is formed by the other die. ### Claim 14 (depends on 13) A method as claimed in claim 13, wherein the method includes the steps of filling a first cavity of the lower die with powder metal, bringing the upper die into abutment with the lower die and thereafter moving the powder metal in the first cavity so that it occupies cavities in both dies and thereafter compressing the powder metal in said cavities. ### Claim 15 (depends on 14) A method as claimed in claim 14, wherein the compaction tool set includes at least one core pin that together with the lower die helps define the first cavity into which powder metal is filled, said at least one core pin defining a bore in the powder metal part upon completion of compaction of the part. ### Claim 16 (depends on 15) A method as claimed in claim 15, wherein the core pin is stepped in shape so as to define a stepped bore of a larger diameter and a smaller diameter in the powder metal part upon completion of compaction of the part. ### Claim 17 (depends on 16) A method as claimed in claim 16, wherein a tubular punch surrounds a portion of the core pin below the first cavity and has an end face that defines an end surface of the powder metal part upon completion of compaction of the part.