# US 2014/0193286 A1 · Method and treatment element blank for the production of a treatment element for a screw machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193286 A1 - Document ID: US20140193286A1 - Status: Published application - Kind: A1 - Application number: 14/236,457 - Filed: 2012-07-31 - Published: 2014-07-10 - Earliest claimed: 2011-08-01 - Inventors: Dietmar John; Dirk Kyrion; Karl-Conrad Polzer; Peter Munkes; Reinhard Wuttke - Web page: https://patentgrep.com/patent/US20140193286A1 ## CPC - B01F 27/0531: {with particular surface characteristics, e.g. coated or rough} - B01F 27/1143: screw-shaped, e.g. worms - B22F 3/15: Hot isostatic pressing - B22F 5/06: of threaded articles, e.g. nuts - B22F 7/08: with one or more parts not made from powder {(B22F7/062 takes precedence)} - Y10T 428/12063: Nonparticulate metal component - B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06) - 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 In a method for the production of a treatment element for a screw machine, a treatment element core of a first metal material is arranged in an inner space of a capsule of a hot isostatic pressing installation so that a contoured annular space is formed between a capsule wall and a treatment element core. The annular space is filled with a powder of a second metal material so as to produce an anti-wear layer. Afterwards, the treatment element blank is produced in such a way that the materials are combined by hot isostatic pressing to form a composite body. The treatment element blank is then post-processed to form the treatment element. The method according to the invention simplifies the production of treatment elements by in particular simplifying post machining and/or heat treatment of the anti-wear layer thus produced. ## Claims ### Claim 1 A method for the production of a treatment element for a screw machine, the method comprising the following steps: providing a capsule having a central longitudinal axis and a capsule wall defining an inner space; arranging a treatment element core of a first metal material in the inner space in such a way that an annular space is formed between the capsule wall and the treatment element core and the annular space is provided with a contour along the central longitudinal axis; filling the annular space with a powder of a second metal material so as to form an anti-wear layer; producing a treatment element blank in such a way that a composite body is produced from the materials by hot isostatic pressing; and post-processing the treatment element blank to obtain the treatment element. ### Claim 2 (depends on 1) A method according to claim 1, wherein the treatment element core is provided with a contour on a core outer side for producing the contoured annular space. ### Claim 3 (depends on 1) A method according to claim 1, wherein a core outer side has a radial distance from a central longitudinal axis of the treatment element core which radial distance varies along said central longitudinal axis. ### Claim 4 (depends on 1) A method according to claim 1, wherein a capsule wall inner side of the capsule wall is cylindrical. ### Claim 5 (depends on 4) A method according to claim 4, wherein the treatment element blank is formed by machining in such a way that a treatment element outer contour is produced. ### Claim 6 (depends on 1) A method according to claim 1, wherein a capsule wall inner side of the capsule wall is provided with a contour for producing the contoured annular space. ### Claim 7 (depends on 1) A method according to claim 1, wherein a capsule wall inner side of the capsule wall has a varying radial distance from the central longitudinal axis. ### Claim 8 (depends on 6) A method according to claim 6, wherein the treatment element blank is produced in such a way as to be provided with a treatment element outer contour and an anti-wear layer outer side only requires fine machining during post-processing. ### Claim 9 (depends on 6) A method according to claim 6, wherein a core outer side of the treatment element core has a constant radial distance from said central longitudinal axis along said central longitudinal axis. ### Claim 10 (depends on 1) A method according to claim 1, wherein in order to produce the contoured annular space, a capsule wall inner side of the capsule wall and a core outer side of the treatment element core are provided with a contour. ### Claim 11 (depends on 1) A method according to claim 1, wherein a capsule wall inner side and a capsule wall outer side of the capsule wall are provided with a contour. ### Claim 12 (depends on 1) A method according to claim 1, wherein a capsule bottom and a capsule cover are provided with through-openings which are arranged concentrically to each other for producing the treatment element blank having a through-hole. ### Claim 13 A treatment element blank for the production of a treatment element for a screw machine, the treatment element blank comprising: a treatment element core of a first metal material; an anti-wear layer of a second metal material surrounding the treatment element core, wherein the second material is combined with the first material by hot isostatic pressing to form a composite body, wherein the anti-wear layer is provided with a contour along a central longitudinal axis. ### Claim 14 (depends on 13) A treatment element blank according to claim 13, wherein a core outer side of the treatment element core facing the anti-wear layer is provided with a contour. ### Claim 15 (depends on 13) A treatment element blank according to claim 13, wherein a core outer side has a radial distance from a central longitudinal axis of the treatment element core that varies along the central longitudinal axis. ### Claim 16 (depends on 13) A treatment element blank according to claim 13, wherein the treatment element blank has a cylindrical blank outer side. ### Claim 17 (depends on 13) A treatment element blank according to claim 13, wherein an anti-wear layer outer side of the anti-wear layer facing away from the treatment element core is provided with a contour. ### Claim 18 (depends on 13) A treatment element blank according to claim 13, wherein a core outer side of the treatment element core facing the anti-wear layer and an anti-wear layer outer side of the anti-wear layer facing away from the treatment element core are provided with a contour. ### Claim 19 (depends on 17) A treatment element blank according to claim 17, wherein the anti-wear layer has a radial distance from the central longitudinal axis that varies along the central longitudinal axis. ### Claim 20 (depends on 13) A treatment element blank according to claim 13, wherein the treatment element core is tubular.