# US 8,784,088 B2 · Auger feeder for concrete mix, and slipform-casting apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,088 B2 - Document ID: US8784088B2 - Status: Granted - Kind: B2 - Application number: 12/756,760 - Filed: 2010-04-08 - Published: 2010-10-14 - Granted: 2014-07-22 - Earliest claimed: 2009-04-09 - Assignees: Elematic Oy Ab - Applicants: Aimo Seppänen; Tapio Kukka; Heikki Lehtonen; Lassi Järvinen; Jani Eilola - Inventors: Aimo Seppänen; Tapio Kukka; Heikki Lehtonen; Lassi Järvinen; Jani Eilola - Web page: https://patentgrep.com/patent/US8784088B2 ## CPC - B28B 3/222: {Screw or worm constructions} - B29C 48/03: characterised by the shape of the extruded material at extrusion - B29C 48/2522: {Shaft or screw supports, e.g. bearings} - B29C 48/397: {using a single screw} - B29C 48/52: with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance - B29C 48/53: having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk - B28B 1/084: {the vibrating moulds or cores being moved horizontally for making strands of moulded articles} - B28B: SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER (foundry moulding B22C; working stone or stone-like material B28D; shaping of substances in a plastic state, in general B29C; making layered products not composed wholly of these substances B32B) - 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) ## Abstract An auger feeder for concrete mix, comprising a helical segment (1), whereby the auger feeder comprises an insert (2) mounted on an upstream end of the auger feeder, said insert being manufactured in a material softer than that used for manufacturing the auger feeder's helical segment (1), and said insert comprising means (4) for fastening the auger feeder to a casting apparatus. The invention also comprises a method for manufacturing such an auger feeder, and a slipform-casting apparatus equipped with such an auger feeder. ## Claims ### Claim 1 An auger feeder for concrete mix, comprising: a portion comprising a helical segment, and having an upstream end and a downstream end; an insert, comprising: a first end mounted on the upstream end of the portion comprising the helical segment, a second end, comprising a face disposed in the upstream direction of the auger feeder, and comprising means for fastening the auger feeder to a casting apparatus, and a material softer than that of the helical segment, and an cast infill disposed at, and extending in the upstream direction from, the upstream end of the helical segment and covering at least part of the insert at the first end thereof. ### Claim 2 (depends on 1) An auger feeder according to claim 1, wherein the cast infill consists of the same material as the auger feeder's helical segment. ### Claim 3 (depends on 1) An auger feeder according to claim 1, wherein said insert is provided with runners at least in parts covered by said cast infill. ### Claim 4 (depends on 1) An auger feeder according to claim 1, wherein said insert is formed with grooves and recesses, and said cast infill penetrates therein during a casting process of the cast infill. ### Claim 5 (depends on 1) An auger feeder according to claim 1, wherein said cast infill has a diameter which substantially matches the diameter of an opening formed in a mass plate of a slipform-casting apparatus for operating the auger feeder. ### Claim 6 (depends on 1) An auger feeder according to claim 1, wherein said insert is formed from a material having hardness less than 40 HRC determined in its machining stage. ### Claim 7 (depends on 1) A slipform-casting apparatus for concrete mass comprising an auger feeder according to claim 1. ### Claim 8 (depends on 2) An auger feeder according to claim 2, wherein said insert is provided with runners at least in parts covered by said cast infill. ### Claim 9 (depends on 2) An auger feeder according to claim 2, wherein said insert is formed with grooves and recesses, and said cast infill penetrates therein during a casting process of the cast infill. ### Claim 10 (depends on 3) An auger feeder according to claim 3, wherein said insert is formed with grooves and recesses, and said cast infill penetrates therein during a casting process of the cast infill. ### Claim 11 (depends on 8) An auger feeder according to claim 8, wherein said insert is formed with grooves and recesses, and said cast infill penetrates therein during a casting process of the cast infill. ### Claim 12 (depends on 2) An auger feeder according to claim 2, wherein said cast infill has a diameter which substantially matches the diameter of an opening formed in a mass plate of a slipform-casting apparatus for operating the auger feeder. ### Claim 13 (depends on 3) An auger feeder according to claim 3, wherein said cast infill has a diameter which substantially matches the diameter of an opening formed in a mass plate of a slipform-casting apparatus for operating the auger feeder. ### Claim 14 (depends on 4) An auger feeder according to claim 4, wherein said cast infill has a diameter which substantially matches the diameter of an opening formed in a mass plate of a slipform-casting apparatus for operating the auger feeder. ### Claim 15 (depends on 6) An auger feeder according to claim 6, wherein said insert is formed from a material having a hardness less than 36 HRC determined in its machining stage. ### Claim 16 (depends on 15) An auger feeder according to claim 15, wherein said insert is formed from a material having a hardness less than 30 HRC determined in its machining stage. ### Claim 17 (depends on 1) A slipform-casting apparatus for concrete mass equipped with an auger feeder according to claim 1. ### Claim 18 (depends on 1) An auger feeder according to claim 1, wherein the means for fastening the auger feeder to the casting apparatus comprises threaded fastening holes in the face of the second end of the insert.