EP0592183B1 - A method and an apparatus for casting concrete products - Google Patents

A method and an apparatus for casting concrete products Download PDF

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Publication number
EP0592183B1
EP0592183B1 EP19930307890 EP93307890A EP0592183B1 EP 0592183 B1 EP0592183 B1 EP 0592183B1 EP 19930307890 EP19930307890 EP 19930307890 EP 93307890 A EP93307890 A EP 93307890A EP 0592183 B1 EP0592183 B1 EP 0592183B1
Authority
EP
European Patent Office
Prior art keywords
casting
recesses
surface layer
product
pressing
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.)
Expired - Lifetime
Application number
EP19930307890
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0592183A1 (en
Inventor
Risto Sutinen
Kari Nieminen
Olli Harala
Hannu Mononen
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.)
Partek Concrete Development Oy AB
Original Assignee
Partek Concrete Development Oy AB
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 Partek Concrete Development Oy AB filed Critical Partek Concrete Development Oy AB
Publication of EP0592183A1 publication Critical patent/EP0592183A1/en
Application granted granted Critical
Publication of EP0592183B1 publication Critical patent/EP0592183B1/en
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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
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/29—Producing shaped prefabricated articles from the material by profiling or strickling the material in open moulds or on moulding surfaces
    • 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
    • B28B3/12—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein one or more rollers exert pressure on the material
    • B28B3/123—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein one or more rollers exert pressure on the material on material in moulds or on moulding surfaces moving continuously underneath or between the rollers, e.g. on an endless belt

Definitions

  • the present invention relates to a method of casting a concrete product by using continuous slide casting, wherein concrete mass is extruded onto a bed and into a space between the bed and a mould, by means of slide casting apparatus travelling along the bed, and the mass is compacted and recesses discontinuous in the casting direction are formed in a surface layer of the product.
  • the invention also relates to slide casting apparatus for casting a concrete product provided with discontinuous recesses in the casting direction, which apparatus comprises a mould, means for feeding concrete mass into the mould, one or more compacting vibrators for compacting the concrete mass, a driving mechanism for driving the feeding means and vibrators and for transporting the mould along a casting bed, and pressing means having a pressing surface arranged to be stationary, in the casting direction, whilst forming the recesses in a surface layer of the concrete mass.
  • the surface prepared by means of conventional methods by slide casting is relatively smooth.
  • the surface smoothness is in fact generally a desired property, when the product to be cast acts as such as a visible part of the structure.
  • structures are often used in which the entire structure is formed of an element prepared at a plant and of a portion to be joined thereto and prepared on site.
  • a certain concrete product, in which the dowels are specially important, is a so-called casing, club.
  • the casing slab acts as a mould, on top of which is cast a concrete layer required by the total thickness of the slab.
  • the casing slab remains as part of the structure and the load carrying capacity requires a strong grip between the parts.
  • the necessary dowel grooves have previously been generally such that the product has not been cast in a slide casting manner but in a mould on site, whose bottom contains bulges.
  • the bulges have formed recesses on the lower surface of the slab.
  • a drawback of the method is that one surface of the slab or the upper surface has to be smoothed separately so that a smooth surface could be made visible on the finished slab. This results in an additional working step in the slab casting.
  • a method of casting a concrete product by using continuous slide casting wherein concrete mass is extruded onto a bed and into a space between the bed and a mould, by means of slide casting apparatus travelling along the bed, and the mass is compacted and, after the compaction, recesses discontinuous in the casting direction are formed in a surface layer of the product by using vibration to cause the surface layer to enter a plastic state and by pressing the recesses into the surface layer thus plasticized, characterized in that the effect of the vibration occurring after the compaction is sufficiently low and directed in such a way that the surface layer is plasticized only to a depth necessary to permit the pressing of the recesses, whilst the main portion of the product remains in its compacted state.
  • slide casting apparatus for casting a concrete product provided with recesses discontinuous in the casting direction
  • which apparatus comprises a mould, means for feeding concrete mass into the mould, one or more compacting vibrators for compacting the concrete mass, at least one plasticizing vibrator for plasticizing a surface layer of the compacted concrete mass, pressing means having a pressing surface arranged to be stationary, in the casting direction, whilst forming the recesses in the plasticized surface layer, and a driving mechanism for driving the feeding means and vibrators and for transporting the mould along a casting bed, characterized in that the plasticizing vibrator(s) are arranged so that the effect of the vibration occurring after the compaction is sufficiently low and directed in such a way that the surface layer is plasticized only to a depth necessary to permit the pressing of the recesses, whilst the main portion of the product remains compacted.
  • the recesses are formed by pressing. i.e. without removing any of the concrete mass.
  • the slide casting technique requires the use of a fairly dry concrete mass, since the product has to retain its shape after leaving the mould.
  • the pressing of sufficient recesses into such a dry mass after compaction requires the bringing of the surface again into a plastic state, but only to a depth just needed, whereby the cohesion of the entire product after leaving the mould is not in danger.
  • dowel grooves when forming dowel grooves during the casting of a concrete slab, they are formed in an upper surface of the horizontal slab. Then, a flat steel plate may be used as a lower surface of the mould and the visible surface of the mould can be made completely smooth.
  • the invention may also be applied when forming dowels in other concrete products that are prepared by slide casting, such as hollow slabs, beams and pillars.
  • a slide casting machine comprises a frame and a driving mechanism 6, which may also be replaced by an external driving device, as well as a funnel and a moulding box 1, via which the concrete mass flows into a slide casting mould.
  • a moulding beam 2 On the upper surface of the mould is, seen from the funnel 1, first located a moulding beam 2, whereto is fixed one or several vibrators.
  • the vibrating moulding beam 2 improves the flowing of the concrete mass into the mould.
  • the compacting beam 3 compacts the product to be cast into its final form, except for the dowel grooves.
  • the smoothing beam 4 has two tasks. It smooths the surface of the product to be prepared, and on the other hand it prevents the surface of the concrete mass from rising after the actual compacting beam 3. When the rising is thus prevented, the pressure needed for the compaction remains under the compacting beam 3.
  • the recesses are formed by means of a cylindrical press roll 5, whose surface has bulges. These bulges press the corresponding recesses into the surface of the product.
  • the cylindrical press roll 5 may be replaced with an endless belt travelling around rollers, to which belt are fixed bulges for pressing the dowel grooves.
  • the roll or the belt is rotated at a speed synchronized with the advancement of the machine e.g. by means of a toothed belt or a chain so that the roll or the belt rolls along the surface of the product to be cast and simultaneously presses a regular dowel pattern into the concrete surface.
  • a belt refers, except for an entirely flexible belt, also to a caterpillar type construction, which is comprised of plates joined to each other.
  • the roll or the belt may also be replaced with a stamp-type press, which may operate by means of cranks or levers or also hydraulically.
  • the press performs in the pressing direction a to-and-fro movement towards the product and away therefrom.
  • the movement track of the device is such that it does not drag along the surface of the product as the machine advances, so it presses a sharp pattern. This means that on one hand, during the pressing step, the press remains stationary relative to the casting direction on the surface of the product, moving relative to the casting machine, and on the other hand, when it comes off the product, it returns back to the same position relative to the casting machine.
  • the roll 5 may be vibrated e.g. by vibrating bearing blocks supporting the roll. Similarly, the vibration of the belt is achieved by vibrating the support rollers of the belt. When using a stamp-type press, the vibrator may be placed inside the press itself.
  • the vibrating effects of both the dowel-making device itself and of the balancing beam 4 have been selected such that they are sufficient for plasticizing again the surface of the slab, but only to such a depth that the dowel patterns may be pressed without endangering the shape of the rest of the slab.
  • the upper surface of the slide mould of the hollow-slab machine is replaced with apparatus as described above.
  • the mass flow into the slide mould is arranged by screws as well as by compacting mandrels located after the screws.
  • the method and apparatus of the invention may also produce dowel patterns in the side surfaces of a concrete element by installing corresponding devices on the side walls of the slide cast mould.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
EP19930307890 1992-10-05 1993-10-05 A method and an apparatus for casting concrete products Expired - Lifetime EP0592183B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI924486 1992-10-05
FI924486A FI101208B1 (fi) 1992-10-05 1992-10-05 Menetelmä betonituotteiden valamiseksi

Publications (2)

Publication Number Publication Date
EP0592183A1 EP0592183A1 (en) 1994-04-13
EP0592183B1 true EP0592183B1 (en) 1998-01-07

Family

ID=8535981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930307890 Expired - Lifetime EP0592183B1 (en) 1992-10-05 1993-10-05 A method and an apparatus for casting concrete products

Country Status (4)

Country Link
EP (1) EP0592183B1 (fi)
JP (1) JPH06190819A (fi)
DE (1) DE69316135T2 (fi)
FI (1) FI101208B1 (fi)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103231431B (zh) * 2013-04-26 2015-09-02 王庆起 龙门架式双工位液压制砖机组合料斗

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES309687A1 (es) * 1965-02-23 1965-06-01 Barragan Sebastian Manuel Mejoras en la construccion de dispositivos para el hormigonado y vibrado de superficies inclinadas o curvas
GB1387826A (en) * 1971-07-02 1975-03-19 Spiroll Corp Ltd Device for forming shear keyways on sides of extruded slabs and the like
DE2426205A1 (de) * 1974-05-16 1975-12-11 Stetter Gmbh Vorrichtung zur oberflaechenbearbeitung von bauteilen aus erhaerteten werkstoffen
US4067676A (en) * 1974-12-19 1978-01-10 Hewitt Frederick M Apparatus for extruding reinforced concrete
FR2448422A1 (fr) * 1979-02-07 1980-09-05 Applic Ceramiques Et Machine fileuse perfectionnee pour la fabrication de poutrelles precontraintes

Also Published As

Publication number Publication date
DE69316135D1 (de) 1998-02-12
FI101208B (fi) 1998-05-15
FI924486A (fi) 1994-04-06
FI101208B1 (fi) 1998-05-15
EP0592183A1 (en) 1994-04-13
FI924486A0 (fi) 1992-10-05
JPH06190819A (ja) 1994-07-12
DE69316135T2 (de) 1998-05-14

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