EP 0235114 B1 19910109 - SLIPFORMING EXTRUDER FOR HOLLOW-CORE CONCRETE ELEMENTS
Title (en)
SLIPFORMING EXTRUDER FOR HOLLOW-CORE CONCRETE ELEMENTS
Publication
Application
Priority
FI 860234 A 19860117
Abstract (en)
[origin: EP0235114A2] This publication describes a slipforming extruder for production of hollow-core concrete elements (23), movable in respect to a casting bed (4) and comprising a frame (18) which is movable, e.g. supported by wheels (19), and provided with at least two adjacent auger flights (2, 25) with flights (5) and a core-forming mandrel (3), attached to the final end of each auger flight (2). Furthermore, the machine comprises a primary drive and power train system (7, 15, 16, 17) for rotating the auger flights (2) and a feed apparatus attached to the frame (18), e.g. a hopper (1), for feeding the auger flights (2) with the concrete mix to be cast. According to the invention, a secondary drive and power train system (8...14) moves the adjacent auger flights (e.g. 2 and 25) in a synchronized and counterphased reciprocating manner in the axial direction. Because the machine disposes of core vibration, it achieves a low level of generated noise.
IPC 1-7
IPC 8 full level
B28B 1/08 (2006.01); B28B 1/29 (2006.01); B28B 7/18 (2006.01)
CPC (source: EP)
B28B 1/084 (2013.01); B28B 3/228 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0235114 A2 19870902; EP 0235114 A3 19871111; EP 0235114 B1 19910109; AT E59803 T1 19910115; DE 3767179 D1 19910214; DK 22087 A 19870718; DK 22087 D0 19870116; FI 76516 B 19880729; FI 860234 A0 19860117; FI 860234 A 19870718; NO 870200 D0 19870116; NO 870200 L 19870720
DOCDB simple family (application)
EP 87890001 A 19870112; AT 87890001 T 19870112; DE 3767179 T 19870112; DK 22087 A 19870116; FI 860234 A 19860117; NO 870200 A 19870116