# US 10,441,996 B2 · Collapsible core and a casting mold half equipped therewith > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,441,996 B2 - Document ID: US10441996B2 - Status: Granted - Kind: B2 - Application number: 14/647,761 - Filed: 2013-11-28 - Published: 2016-01-21 - Granted: 2019-10-15 - Earliest claimed: 2012-11-28 - Assignees: Oskar Frech GmbH + Co. KG - Applicants: Oskar Frech GmbH + Co. KG - Inventors: Ronny Aspacher; Herbert Trebes; Norbert Erhard - Web page: https://patentgrep.com/patent/US10441996B2 ## CPC - B22C 9/103: {Multipart cores} - B22D 17/229: {with exchangeable die part (B22D17/2245 takes precedence)} - B22D 17/24: Accessories for locating and holding cores or inserts - B29C 45/4421: {using expansible or collapsible cores} - B29L 2031/757: {Moulds, cores, dies} - B22C: FOUNDRY MOULDING (moulding refractory materials in general B28B) - B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22) - 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) - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES ## Abstract A collapsible core is provided for attachment to a mold half of a casting mold, particularly a diecasting mold. The collapsible core can take the form of a removable collapsible core which can be detachably mounted on the mold half on the mold cavity side. A collapsible core can have a core cylinder body of at least two first core sections in the form of cylinder segments and at least two second core sections in the form of cylinder segments arranged alternating with the first sections over the circumferential direction. The first and the second core sections are retained moveably relative to one another. The relative movement here between the first and the second core sections consists of an axial relative movement component between the first and the second core sections and a radial collapsing movement of the first and/or the second core section. ## Claims ### Claim 1 A collapsible core for attachment on a mold half of a casting mold, wherein said collapsible core is configured as a removable collapsible core so as to be removably attachable to the mold half on a mold cavity side without any disassembly of the mold half, whereby the removable collapsible core is removable in running operation between casting cycles. ### Claim 2 (depends on 1) The collapsible core according to claim 1, further comprising: a latching element for a latch connection to the mold half. ### Claim 3 (depends on 1) The collapsible core according to claim 1, further comprising: a core cylinder body made of at least two first core jaws in the form of cylinder segments and at least two second core jaws in the form of cylinder segments, which are arranged alternately to the first core jaws in circumferential direction, wherein the first and the second core jaws are held so to be relatively movable against one another, wherein the relative movement between the first and the second core jaws includes an axial relative movement component between the first and the second core jaws and a radial collapsing movement of the first and/or the second core jaws. ### Claim 4 (depends on 3) The collapsible core according to claim 3, further comprising: a base body, from which the core cylinder body extends essentially axially, wherein in axial direction away from the base body the first core jaws have a conically decreasing segment width and the second core jaws have a corresponding conically increasing segment width, or the first core jaws have a conically increasing segment width and the second core jaws have a corresponding conically decreasing segment width. ### Claim 5 (depends on 3) The collapsible core according to claim 3, wherein the second core jaws comprise receptacle elements for a core jaw push rod of the mold half. ### Claim 6 (depends on 3) The collapsible core according to claim 3, wherein the first and second core jaws are guided against one another by guide elements acting formfittingly between them. ### Claim 7 (depends on 3) The collapsible core according to claim 3, wherein the first and the second core jaws have edge angles on their longitudinal sides in relation to the outer sides, which are all greater than 60°. ### Claim 8 A casting mold half, comprising: a collapsible core receptacle; and a collapsible core, which is insertable detachably into the collapsible core receptacle on a mold cavity side, wherein the collapsible core is embodied as a removable collapsible core, which is removably attachable to the mold half on a mold cavity side without any disassembly of the mold half. ### Claim 9 (depends on 8) The casting mold half according to claim 8, further comprising: an ejector device, to which a core jaw push rod is coupled, said core jaw push rod being received in a receptacle element of the collapsible core. ### Claim 10 (depends on 8) The casting mold half according to claim 8, further comprising: an ejector device and a latching element, the latching element interacting with a counterpart hollow core latching element of the collapsible core; and a release element, which is coupled to the ejector device, for independent disengagement of a latch connection formed by the latching element and the counterpart hollow core latching element. ### Claim 11 A core for attachment on a mold half of a casting mold, comprising: a removable collapsible core comprising means for removably attaching the removable collapsible core to the mold half on a mold cavity side without any disassembly of the mold half.