EP1952961B1 - Verfahren und Vorrichtung zum Giessen von Betonprodukten - Google Patents

Verfahren und Vorrichtung zum Giessen von Betonprodukten Download PDF

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Publication number
EP1952961B1
EP1952961B1 EP08397001A EP08397001A EP1952961B1 EP 1952961 B1 EP1952961 B1 EP 1952961B1 EP 08397001 A EP08397001 A EP 08397001A EP 08397001 A EP08397001 A EP 08397001A EP 1952961 B1 EP1952961 B1 EP 1952961B1
Authority
EP
European Patent Office
Prior art keywords
casting
frequency
concrete
accordance
dual
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.)
Not-in-force
Application number
EP08397001A
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English (en)
French (fr)
Other versions
EP1952961A2 (de
EP1952961A3 (de
Inventor
Aimo Seppänen
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.)
Elematic Oyj
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Elematic Oyj
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Application filed by Elematic Oyj filed Critical Elematic Oyj
Publication of EP1952961A2 publication Critical patent/EP1952961A2/de
Publication of EP1952961A3 publication Critical patent/EP1952961A3/de
Application granted granted Critical
Publication of EP1952961B1 publication Critical patent/EP1952961B1/de
Not-in-force 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
    • 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
    • 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

Definitions

  • the present invention relates to casting of concrete products by means of a substantially horizontal slipforming process, wherein the concrete mass is pressurized at least by means of one feeding screw. More precisely, the invention relates to the motion of the feed screw and/or the element forming the hollow core during the casting process.
  • the casting mold When casting with traditional extruder and slipformer casting machines, the casting mold is formed by a casting bed and side walls and upper surface moving along with the casting machine and forming the cross section of the product to be cast to the desired shape and size.
  • the side walls and the upper surface, and if necessary, the elements forming one or a plurality of hollow cores to the product to be cast perform motion compacting the concrete mass.
  • the ready-cast product remains on the casting bed to harden. Because the cast fresh slab remains lying on the casting bed in its final form, a high stiffness is required from the concrete mass to be used in the solutions of prior art.
  • the stiff concrete mass used in the solutions of prior art causes strong wear of the wear parts of the slipforming machine, like the feed screws and the hollow-core forming elements, whereby these wear parts must be changed relatively often. In connection with the chance of the wear parts, also the casting process of the production plant must be interrupted for the duration of the change.
  • the stiff concrete mass also causes mechanical burden on the processing devices, like the trowelling devices of the upper surface, side walls and the hollow-core mandrels, and the rotating devices of the screws, and degradation of the compacting efficiency caused by the fast wear.
  • Document EP 0 677 362 discloses a method and an apparatus for casting concrete products with a substantially horizontal slip forming process according to the preambles of claims 1 and 4 respectively.
  • Patent publication PI 80845 discloses a method and an apparatus for casting a hollow-core slab.
  • the compacting method described therein is based on reciprocal swinging of the hollow-core mandrel simultaneously with the reciprocal longitudinal motion.
  • the heights of the slabs are increasing, whereby also the heights of the hollow cores are increased.
  • the adequate compacting of the hollow core is not achieved.
  • Patent publication FI 85350 discloses a compacting method, wherein wedge surfaces are moved in the casting direction in opposite directions with respect to each other in a reciprocal, opposite phase.
  • the effect of the wedge surfaces remains quite small, because the wedge surfaces must be quite low from the point of view of the flow of the concrete mix, which decreases their properties decreasing or increasing the compacting area. With deep wedge surfaces the flow of the concrete mix is prevented.
  • the length of the reciprocal motion of the feed screw and the hollow-core mandrels ranges from 5 to 50 mm with a frequency from 1 to 10 Hz.
  • a slipforming machine having a simple construction for the slipforming process, comprising a dual-frequency compacting arrangement, whereby a better compacting result with less wear of the components can be provided than with prior art machines.
  • Dual-frequency compacting method in this connection refers to a compacting method, wherein the mass is compacted simultaneously with two different frequencies.
  • the method in accordance with the present invention is characterized by what is stated in the characterizing part of Claim 1, and the apparatus in accordance with the present invention is characterized by what is stated in the characterizing part of Claim 4.
  • Essential parts of the slipforming machine shown in Figure 1 are the mass container 1, feed screw 2, driving devices 3, 4, 5 of the feed screw, hollow-core mandrel 6, side walls 7, trowelling beam 8, driving devices 9 of the trowelling beam, surface leveling plate 10, casting bed 11, drive motor 12 and the chute 13 of the feed screw.
  • the apparatus shown in the figure is meant for casting hollow-core slabs or beams.
  • stiff concrete mass is fed from the mass container 1 to one or a plurality of feed screws 2.
  • Each of the feed screws 2 is located in a chute 13 guiding the concrete mass to the feed screw at the forward end of the feed screw.
  • the feed screws 2 extrude the concrete mass under pressure to the cross section defined by the casting bed 11, side walls 7 and trowelling beam 8 defining the outer dimensions of the product to be cast.
  • the rotating motion caused by the extrusion of the concrete mass by the feed screws 2 is effected by means of the driving device 3 of the rotating motion.
  • the casting machine moves supported by wheels along the casting bed driven by the reaction force of the feed screws 2, said force moving the casting machine forward being accelerated or decelerated by means of a drive motor 12 connected to the casting machine.
  • the product to be cast is compacted by means of the reciprocal motion of the feed screws 2 and the hollow-core mandrels 6, as well as by the compacting trowelling motion of the side walls 7 and the trowelling beam 8, which in case of the trowelling beam is effected by the driving devices 9 of the trowelling beam.
  • the surface leveling plate 10 following the trowelling beam 8 levels the upper surface of the final product.
  • the reciprocal motion of the feed screws 2 and the hollow-core mandrels 6 is a dual-frequency motion effected by means of a long-motion driving means 5 and a short-motion driving means 4.
  • the driving means 4 performs several reciprocal motions during one long reciprocal motion of the driving means 5.
  • the compacting assembly formed by the feed screws 2 and the hollow-core mandrels 6 performs several short reciprocal motions at the same time when said compacting assembly performs one long reciprocal motion.
  • the length of the short reciprocal motion preferably ranges from 0,2 to 4 mm having preferably a frequency from 15 to 50 Hz.
  • the length and frequency of the long reciprocal motion of the solution in accordance with the invention essentially corresponds to the corresponding motion of the solutions known in the art, in other words the length ranging from 5 to 40 mm with a frequency from 1 to 10 Hz.
  • This kind of a dual-frequency compacting motion in accordance with the invention provides for the part of the short motion:
  • the solution in accordance with the invention is not limited to the method and apparatus for casting concrete products with hollow cores, only, like shown in the example of the figure, but it is also applicable to casting of for example massive slabs without hollow cores.
  • the hollow-core forming elements are removed from the casting apparatus, and only the feed screw/screws is/are moved reciprocally with the dual-frequency compacting motion.
  • the solution in accordance with the invention can also be implemented with a fixed casting station, whereby the casting apparatus is located in the fixed casting station, but the casting bed moves with respect to the casting station. Thereby the movable casting bed moves the finished product out of the fixed casting station, and the ready-cast product remains on the casting bed.

Claims (9)

  1. Verfahren zum Gießen von Betonprodukten mit einem im Wesentlichen horizontalen Gleitschalungsprozess, wobei die Betonmasse in dem Verfahren zumindest mittels eines Zuführelements (2) durch einen begrenzten Querschnitt (11, 7, 8) zum Formen eines Betonproduktes zugeführt wird, dadurch gekennzeichnet, dass die Zuführelemente (2) zum Verdichten der Betonmasse in eine doppelfrequente Hin- und Herlängsbewegung versetzt werden.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das zu gießende Produkt ein Betonprodukt ist, das mit zumindest einem Hohlkern ausgestattet ist, wodurch zusätzlich zu den Zuführelementen (2) auch die Hohlkern-Formungselemente (6) in die doppelfrequente Hin- und Herlängsbewegung versetzt werden.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Länge der kurzen Hin- und Herbewegung der doppelfrequenten Bewegung in einem Bereich von 0,2 bis 4 mm mit einer Frequenz von 15 bis 50 Hz liegt, und dass die Länge der langen Hin- und Herbewegung in einem Bereich von 5 bis 40 mm mit einer Frequenz von 1 bis 10 Hz liegt.
  4. Vorrichtung zum Gießen von Betonprodukten mit einem im Wesentlichen horizontalen Gleitschalungsprozess, wobei die Vorrichtung zumindest ein Zuführelement (2) zum Zuführen der Betonmasse durch einen begrenzten Querschnitt (11, 7, 8) zum Formen eines Betonprodukts umfasst, dadurch gekennzeichnet, dass die Vorrichtung Mittel (4, 5) umfasst, um die Zuführelemente (2) zum Verdichten der Betonmasse in eine doppelfrequente Hin- und Herlängsbewegung zu versetzen.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Vorrichtung Mittel (6) zum Formen zumindest eines Hohlkerns an dem zu gießenden Betonprodukt umfasst, wobei die Mittel (6) zusammen mit den Zuführelementen (2) in die doppelfrequente Hin-und Herlängsbewegung versetzt werden.
  6. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Länge der kurzen Hin- und Herbewegung der doppelfrequenten Bewegung in einem Bereich von 0,2 bis 4 mm mit einer Frequenz von 15 bis 50 Hz liegt, und dass die Länge der langen Hin- und Herbewegung in einem Bereich von 5 bis 40 mm mit einer Frequenz von 1 bis 10 Hz liegt.
  7. Vorrichtung nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass das Zuführelement eine Zuführschnecke (2) ist.
  8. Vorrichtung nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass die Vorrichtung Mittel (2) zum Bewegen der Vorrichtung entlang des Gießbetts (11) während des Gießens umfasst.
  9. Vorrichtung nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass die Vorrichtung eine feste Gießstation und bewegliche Gießbetten umfasst.
EP08397001A 2007-02-05 2008-01-15 Verfahren und Vorrichtung zum Giessen von Betonprodukten Not-in-force EP1952961B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20070099A FI119050B (fi) 2007-02-05 2007-02-05 Menetelmä ja laitteisto betonituotteiden valamiseksi

Publications (3)

Publication Number Publication Date
EP1952961A2 EP1952961A2 (de) 2008-08-06
EP1952961A3 EP1952961A3 (de) 2010-09-08
EP1952961B1 true EP1952961B1 (de) 2012-04-04

Family

ID=37832145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08397001A Not-in-force EP1952961B1 (de) 2007-02-05 2008-01-15 Verfahren und Vorrichtung zum Giessen von Betonprodukten

Country Status (5)

Country Link
EP (1) EP1952961B1 (de)
AT (1) ATE552088T1 (de)
CA (1) CA2618581C (de)
ES (1) ES2384810T3 (de)
FI (1) FI119050B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103978551A (zh) * 2014-04-25 2014-08-13 河南省四达仙龙实业有限公司 一种钢筋水泥楼板成型机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI85350C (fi) 1984-08-24 1993-01-28 Lohja Parma Eng Lpe Glidgjutmaskin foer framstaellning av betongelement och isynnerhet haolelement
FI80845C (fi) 1985-03-01 1991-08-06 Kt Suunnittelu Oy Glidgjutmaskin foer anvaendning vid framstaellning av betongelement.
FI110174B (fi) * 1994-04-07 2002-12-13 Valkeakoski Extec Oy Ltd Laite betonituotteen valmistamiseksi
FI115618B (fi) * 1999-03-02 2005-06-15 Valkeakoski Extec Oy Ltd Sovitelma ja menetelmä tiivistysliikkeen aikaansaamiseksi betonin valu koneessa

Also Published As

Publication number Publication date
CA2618581A1 (en) 2008-08-05
EP1952961A2 (de) 2008-08-06
ES2384810T3 (es) 2012-07-12
CA2618581C (en) 2011-05-24
ATE552088T1 (de) 2012-04-15
FI20070099A0 (fi) 2007-02-05
EP1952961A3 (de) 2010-09-08
FI119050B (fi) 2008-07-15

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