# US 2018/0022050 A1 · Powder Press Having a Conical Lower Ram, Method for Operating a Powder Press, Pellet Produced by Way of a Powder Press, Lower Ram of a Powder Press, and Computer Program Product for Moving Lower Rams of a Press > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0022050 A1 - Document ID: US20180022050A1 - Status: Published application - Kind: A1 - Application number: 15/547,708 - Filed: 2016-01-29 - Published: 2018-01-25 - Earliest claimed: 2015-02-02 - Assignees: GKN Sinter Metals Engineering GmbH - Applicants: GKN Sinter Metals Engineering GmbH - Inventors: Eberhard Ernst; Rainer Schmitt; Hasim Tekines; Christian Siegert - Web page: https://patentgrep.com/patent/US20180022050A1 ## CPC - B30B 11/02: using a ram exerting pressure on the material in a moulding space - B22F 3/03: Press-moulding apparatus therefor - B22F 2003/033: {with multiple punches working in the same direction} - B30B: PRESSES IN GENERAL (producing ultra-high pressure or ultra-high pressure and high temperature to effect modifications of a substance, e.g. for making artificial diamonds B01J3/00 ){(compressing means for refuse receptacles B65F1/1405)} - 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 ## Abstract A powder press is proposed with a die construction which has a conical lower ram (UE) with lower rams which are nested inside one another, wherein each lower ram has a longitudinal extent, in particular a cylindrical longitudinal extent, which is guided by way of a template (M), wherein a conical widened portion adjoins preferably every longitudinal extent, wherein a respective cone angle of the lower ram preferably increases from the inside to the outside. ## Claims ### Claim 1 A powder press comprising a tool structure which has a conical substructure with lower punches nested in one another, wherein each lower punch has a longitudinal extent, which is a cylindrical longitudinal extent, which is guided through a die, wherein each longitudinal extent is adjoined by a conical enlargement, wherein a respective cone angle of the lower punches increases from the inside out. ### Claim 2 (depends on 1) The powder press as claimed in claim 1, wherein the respective longitudinal extent of the lower punches decreases from the inside out. ### Claim 3 (depends on 1) The powder press as claimed in claim 1, wherein a punch holder directly adjoins the conical enlargement. ### Claim 4 (depends on 1) The powder press as claimed in claim 1, wherein the conical enlargement of the respective lower punch increases to such an extent that an associated punch holder terminates flush with the lower punch laterally on the outside. ### Claim 5 (depends on 1) The powder press as claimed in claim 1, wherein the conical enlargement of the lower punch transitions into a cylindrical portion, wherein the cylindrical portion has fastener for a punch holder. ### Claim 6 (depends on 1) The powder press as claimed in claim 1, wherein a punch holder is connected directly to a lower punch by a bayonet fastener. ### Claim 7 (depends on 1) The powder press as claimed in claim 1, wherein a connection between a punch holder and lower punch takes place without a pressure plate and a clamping plate. ### Claim 8 (depends on 1) The powder press as claimed in claim 1, wherein the lower punches are constructed in a rotationally symmetrical manner. ### Claim 9 (depends on 1) The powder press as claimed in claim 1, wherein an upper punch has a longitudinal extent which extends into the die, wherein an expansion adjoins the longitudinal extent. ### Claim 10 (depends on 1) The powder press as claimed in claim 1, wherein the upper punch and/or the lower punch are produced in one piece. ### Claim 11 (depends on 1) The powder press as claimed in claim 1, wherein the upper punch and/or the lower punch are produced in a multipart manner. ### Claim 12 (depends on 1) A method for operating a powder press having lower punches as claimed in claim 1, wherein equalization takes place via position control while the lower punches are being moved. ### Claim 13 (depends on 12) The method as claimed in claim 12, wherein a compact made of metal powder is created. ### Claim 14 (depends on 1) A compact produced with a powder press as claimed in claim 1, wherein a density along a cross section of the compact is constant. ### Claim 15 (depends on 1) A lower punch of a powder press as claimed in claim 1, wherein the lower punch has been produced by a machining method, by a primary forming method, pressing, cold forming and/or casting. ### Claim 16 (depends on 1) A computer program product for moving lower punches of a press as claimed in claim 1, wherein computer program code is stored in order to be run in a controller, said computer program code allowing the lower punches to be moved under position control.