EP0235114A2 - Gleitfertiger für Hohldielen aus Beton - Google Patents

Gleitfertiger für Hohldielen aus Beton Download PDF

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Publication number
EP0235114A2
EP0235114A2 EP87890001A EP87890001A EP0235114A2 EP 0235114 A2 EP0235114 A2 EP 0235114A2 EP 87890001 A EP87890001 A EP 87890001A EP 87890001 A EP87890001 A EP 87890001A EP 0235114 A2 EP0235114 A2 EP 0235114A2
Authority
EP
European Patent Office
Prior art keywords
auger
flight
flights
core
extruder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87890001A
Other languages
English (en)
French (fr)
Other versions
EP0235114B1 (de
EP0235114A3 (en
Inventor
Aimo Seppänen
Lassi Järvinen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOHJA PARMA ENGINEERING LPE Oy
Original Assignee
LOHJA PARMA ENGINEERING LPE Oy
KT SUUNNITTELU Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LOHJA PARMA ENGINEERING LPE Oy, KT SUUNNITTELU Oy filed Critical LOHJA PARMA ENGINEERING LPE Oy
Priority to AT87890001T priority Critical patent/ATE59803T1/de
Publication of EP0235114A2 publication Critical patent/EP0235114A2/de
Publication of EP0235114A3 publication Critical patent/EP0235114A3/en
Application granted granted Critical
Publication of EP0235114B1 publication Critical patent/EP0235114B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/22—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded by screw or worm
    • B28B3/228—Slipform casting extruder, e.g. self-propelled extruder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/084—Producing shaped prefabricated articles from the material by vibrating or jolting the vibrating moulds or cores being moved horizontally for making strands of moulded articles

Definitions

  • the present invention relates to a concrete slab extruder in accordance with the preamble of claim 1.
  • Casting of hollow-core concrete elements with sliding molds, especially hollow-core slabs is based on extruding the concrete mix onto the casting bed by using one or sev­eral core-forming members, e.g. a core-forming mandrel and/or a trowel tube.
  • the concrete mix is compacted by utilizing the pressure generated by the auger flight.
  • a forming member extension is provided immediately next to the auger flight, e.g., a core-forming mandrel, which is vibrated by means of a vibrator mounted inside the mandrel.
  • a vibrator beam atop the cover part of the machine is vibrated, which combines with the vibration of the core­forming mandrels to effect the final compaction of the concrete.
  • the core-forming mandrel is accompanied with a trowel tube, whose duty is to support the shell walls of the hollow-core slab at the final end of the extruder machinery.
  • the drawbacks of the extruder construction of the hollow-core forming mandrel type include a high noise level, high energy consumption, and a low efficiency of vibration power used for compaction.
  • the present invention aims to overcome the disadvantages found in prior-art constructions and to present a completely new type of extruder which is especially applicable for the compaction of a soil-wet concrete mix.
  • the invention is based on moving adjacent auger flights used for concrete extrusion in a synchronized and counterphased reciprocating manner in the axial direction. Then, the rotating movement of the auger flights generates a continuous and steady feed pressure at the final end of the auger flights.
  • the auger flights in accordance with the invention, and especially their core parts, have an approximately constant diameter, thus deviating from the conventional constructions of conical shape.
  • the difference between the outside diameter of auger flights and the diameter of the auger core is small as compared to the conventional auger construction, which allows a relatively large diameter for the auger core.
  • the auger length is also preferably relatively long.
  • a special feature of the invention proposes a decreasing pitch of flights towards the final end of the auger flight.
  • This decrease a pitch is preferably constant, which makes the pitch progressively smaller towards the final end of the auger. Consequently, the pitch of auger flights is essentially smaller at the final end of the auger than at the initial end of the auger.
  • the compaction is furthermore amplified by the axially reciprocating movement of the auger flights.
  • slipforming extruder in accordance with the invention is characterized by what is stated in the characterizing part of claim 1.
  • the noise level generated by an extruder machine in accordance with the invention is essentially lower than in hollow-core extruders based on vibration compaction with a vibration frequency in the range of 150...250 Hz.
  • the slipforming extruder in accordance with the invention is especially applicable to both the production of prestressed hollow-core slabs of the aforementioned type and production of steel-reinforced hollow-core concrete slabs.
  • the slipforming machine shown in Figure 1 is adapted movable on a casting bed 4.
  • the machine comprises a frame 18, which is adapted movable on rails 20 supported on wheels 19. With bearings rotatably secured to the frame 18, it has five parallel auger flights 2, 25 with relatively low-profile flights 5. Consequently, a core member 26 of the auger flights 2 has an appreciably large and approximately constant diameter in the axial direction.
  • the flights 5 have a constant pitch over the entire length of the auger 2.
  • Each final end of the augers 2 carries a stiffly mounted core-forming mandrel 3 and/or a trowel tube.
  • the drive and power train system 7, 15, 16, 17, which is provided for rotating the auger flights 2, is adapted to the movable frame 18.
  • This drive and power train system comprises an electric motor 17, which drives the auger flights 2, 25 via a chain sprocket 16 and a chain 15 by chain sprockets 7, which are mounted onto shafts 6 of the auger flights 2, 25.
  • the concrete poured from a hopper 1 is adapted to flow to the initial end of the auger flights 2.
  • a hollow-core slab 23 to be cast is bordered from below by a bed 4, from the sides by side members which are not shown, and from above by vibrating top beams 21 and 22.
  • a core-forming mandrel 3 forms a cylindrical void 24.
  • the frame 18 also carries secondary drive and power train system 8...14. It comprises an electric motor 14 together with a crankshaft assembly 10, which is driven by the motor and attached to shafts 6 of the adjacent auger flights 2, 25.
  • the assembly is connected via connecting rods 9 to ends 8 of shafts 6 of auger flights 2 so as to make the adjacent auger flights 2, 25 move in a synchronized and counterphased reciprocating manner in the axial direction during the operation of the slipforming extruder machine.
  • the frequency of the reciprocating movement of the auger flights 2, 25 is 0.3...100 Hz, preferably 5...10 Hz.
  • the amplitude of the reciprocating movement (stroke length) is 0.5...50 mm, preferably about 10 mm.
  • the reciprocating movement at the final end of the extrusion phase performs an extremely effective compaction of concrete.
  • the reciprocating movement of the augers 2, 25 creates pressure variations in the concrete by combining the constant rotation of the augers to the pushing motion at the push phase of the augers and thus imparting a transverse shear in the concrete mix. This also forces the concrete aggregates to perform a shearing flow in the direction transverse to the axial flow.
  • the core-forming mandrel 3 as an immediate extension of the auger 2 gives the void 24 a desired form (in this case, a cylindrical form).
  • the aforementioned progressively decreasing pitch is exemplified in the upper auger 2 ⁇ of Figure 2.
  • the pitch of a flight 5 ⁇ is decreased in the feed direction so as to achieve a pitch of 30...70 % at the final end of the auger 2 ⁇ , preferably about 50 % of the pitch at the initial end of the auger 2 ⁇ .
  • the auger 2 has a flight profile 5 with a height of, for instance, 3...10 % of the diameter of the auger 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)
  • External Artificial Organs (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Road Repair (AREA)
EP87890001A 1986-01-17 1987-01-12 Gleitfertiger für Hohldielen aus Beton Expired EP0235114B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87890001T ATE59803T1 (de) 1986-01-17 1987-01-12 Gleitfertiger fuer hohldielen aus beton.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI860234 1986-01-17
FI860234A FI76516B (fi) 1986-01-17 1986-01-17 Glidgjutmaskin foer tillverkning av haolelement av betong.

Publications (3)

Publication Number Publication Date
EP0235114A2 true EP0235114A2 (de) 1987-09-02
EP0235114A3 EP0235114A3 (en) 1987-11-11
EP0235114B1 EP0235114B1 (de) 1991-01-09

Family

ID=8521979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87890001A Expired EP0235114B1 (de) 1986-01-17 1987-01-12 Gleitfertiger für Hohldielen aus Beton

Country Status (6)

Country Link
EP (1) EP0235114B1 (de)
AT (1) ATE59803T1 (de)
DE (1) DE3767179D1 (de)
DK (1) DK22087A (de)
FI (1) FI76516B (de)
NO (1) NO870200L (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1033213A2 (de) * 1999-03-02 2000-09-06 Valkeakoski X-Tec Oy Ltd. Vorrichtung und Verfahren zum Erzeugen einer verdichtender Bewegung in einem Gleitfertiger zum Herstellen von Betongegenständen
WO2004020165A1 (en) * 2002-09-02 2004-03-11 Consolis Technology Oy Ab Method and apparatus for fabricating a hollow-core concrete product

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB391320A (de) * 1900-01-01
US3143782A (en) * 1962-11-01 1964-08-11 Kalns Arvid Concrete slab forming machine
US3177552A (en) * 1962-10-18 1965-04-13 Roth Concrete making machine
GB1207190A (en) * 1966-12-09 1970-09-30 Dansk Spaend As Improvements in or relating to the manufacture of concrete elements
EP0125084A2 (de) * 1983-05-09 1984-11-14 Oy Partek Ab Verfahren und Gleitformmaschine zum Giessen hohler Betonplatten
EP0174923A1 (de) * 1984-09-10 1986-03-19 Lohja Parma Engineering Lpe Oy Betonplattenfertiger mit beweglichen Kernschalungen für eine Scherkraftverdichtung
EP0175930A2 (de) * 1984-08-24 1986-04-02 Lohja Parma Engineering Lpe Oy Verfahren und Vorrichtung zur Herstellung von Hohlplatten und sonstigen Bauelementen vorzugsweise aus Beton

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB391320A (de) * 1900-01-01
US3177552A (en) * 1962-10-18 1965-04-13 Roth Concrete making machine
US3143782A (en) * 1962-11-01 1964-08-11 Kalns Arvid Concrete slab forming machine
GB1207190A (en) * 1966-12-09 1970-09-30 Dansk Spaend As Improvements in or relating to the manufacture of concrete elements
EP0125084A2 (de) * 1983-05-09 1984-11-14 Oy Partek Ab Verfahren und Gleitformmaschine zum Giessen hohler Betonplatten
EP0175930A2 (de) * 1984-08-24 1986-04-02 Lohja Parma Engineering Lpe Oy Verfahren und Vorrichtung zur Herstellung von Hohlplatten und sonstigen Bauelementen vorzugsweise aus Beton
EP0174923A1 (de) * 1984-09-10 1986-03-19 Lohja Parma Engineering Lpe Oy Betonplattenfertiger mit beweglichen Kernschalungen für eine Scherkraftverdichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1033213A2 (de) * 1999-03-02 2000-09-06 Valkeakoski X-Tec Oy Ltd. Vorrichtung und Verfahren zum Erzeugen einer verdichtender Bewegung in einem Gleitfertiger zum Herstellen von Betongegenständen
EP1033213A3 (de) * 1999-03-02 2002-11-13 Valkeakoski X-Tec Oy Ltd. Vorrichtung und Verfahren zum Erzeugen einer verdichtender Bewegung in einem Gleitfertiger zum Herstellen von Betongegenständen
WO2004020165A1 (en) * 2002-09-02 2004-03-11 Consolis Technology Oy Ab Method and apparatus for fabricating a hollow-core concrete product

Also Published As

Publication number Publication date
EP0235114B1 (de) 1991-01-09
EP0235114A3 (en) 1987-11-11
NO870200D0 (no) 1987-01-16
DK22087D0 (da) 1987-01-16
ATE59803T1 (de) 1991-01-15
DK22087A (da) 1987-07-18
DE3767179D1 (de) 1991-02-14
FI860234A0 (fi) 1986-01-17
NO870200L (no) 1987-07-20
FI76516B (fi) 1988-07-29
FI860234A (fi) 1987-07-18

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