EP0677362A1 - Procédé et dispositif pour la fabrication d'éléments en béton - Google Patents

Procédé et dispositif pour la fabrication d'éléments en béton Download PDF

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Publication number
EP0677362A1
EP0677362A1 EP95850070A EP95850070A EP0677362A1 EP 0677362 A1 EP0677362 A1 EP 0677362A1 EP 95850070 A EP95850070 A EP 95850070A EP 95850070 A EP95850070 A EP 95850070A EP 0677362 A1 EP0677362 A1 EP 0677362A1
Authority
EP
European Patent Office
Prior art keywords
movement
compaction
concrete
section
core
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
EP95850070A
Other languages
German (de)
English (en)
Other versions
EP0677362B1 (fr
Inventor
Paavo Ojanen
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.)
Valkeakoski X-Tec Ltd Oy
Original Assignee
Valkeakoski X-Tec Ltd 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 Valkeakoski X-Tec Ltd Oy filed Critical Valkeakoski X-Tec Ltd Oy
Publication of EP0677362A1 publication Critical patent/EP0677362A1/fr
Application granted granted Critical
Publication of EP0677362B1 publication Critical patent/EP0677362B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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 method according to the preamble of claim 1 for producing a concrete product using an extruder casting machine, a continuous-casting machine or similar equipment.
  • the invention also concerns a casting machine according to the preamble of claim 7 suited for implementing the method.
  • Elongated concrete products such as hollow-core slabs are conventionally produced using extruder-type casting machines, or alternatively, continuous-casting machines.
  • the casting machine is comprised of a conical feed hopper connected to one or more feed augers beneath.
  • the feed auger is frequently followed by a core-forming mandrel which is further extended as an auxiliary mandrel supporting the core cavity formed within the product.
  • the core-forming mandrel incorporates a vibrator or similar compacting arrangement for the compaction of the cast concrete into the shape determined by the casting mould and the mandrels.
  • the casting machine has an upper trowelling beam forming the upper edge of the mould, and frequently, the sides of the mould are also designed to perform as side trowelling beams.
  • trowelling beams compact the concrete mix during the course of the casting process and give the cast product a neat surface finish.
  • vibration can also be employed for compaction.
  • Extruder-type casting machines are designed to operate as continuous-casting machines, which are transferred forward on the mould top by the reaction forces imposed by the feed augers.
  • Extruder-type casting machines have undergone a continuing development for a relatively long time, and the first extruder casting machines were developed at the end of the 1960's.
  • the function of extruder casting machines was based on conventional vibrating techniques in which the compaction of concrete is achieved by virtue of different modes of vibration. By means of vibration, the flow of concrete is also essentially eased in the machine.
  • the function of vibration is to impart the concrete aggregates such a high speed that the collision impulse between the particles can reach a sufficiently high energy level to augment the shifting of the aggregate particles and thus the compaction of concrete.
  • the vibrating frequency has typically been in the order of 12.5 - 200 Hz and suitable vibrating equipment is available from several manufacturers.
  • Inventions related to extruder casting machines in the prior art are based on the use of a standard type of vibrator and, obviously, dedicated types of machine constructions.
  • the vibrator equipment typically employed is a rotating vibrator in which a rotating eccentric mass makes a body attached to the vibrator to perform a movement in the same direction the mass and dependent on the rotational speed of the eccentric mass, and this movement is further transferred to the concrete mix.
  • Extruder casting machines have vibrators mounted on different sides of the machine, and the concrete mix is desiredly subjected to efficient compaction particularly in the forming and compacting zone of the concrete product.
  • vibrators have been used in at least core-forming mandrels which with their vibration in the concrete mix achieve efficient compaction of concrete in all directions perpendicular to the flow of concrete particularly in the formation zone of the cast product.
  • compaction has also been achieved by relatively slow movements of the different parts of the casting machine that work the concrete mix.
  • Such compacting movement has been implemented by means of either a sideways deflected rotational movement of the core-forming mandrel which follows the auger and/or cyclic deformation of said mandrel, whereby the compaction of the concrete surrounding the mandrel is attained through varying the cross section of the mandrel.
  • the cyclic reciprocating rotational movement has been used particularly for compaction in conjunction with mandrels of noncircular cross section.
  • the above-described compacting method is generally called the working compaction or the shear compaction, and one of its benefits is that the movements and displacements of aggregate particles will be large already at low number of movements, that is, at low frequency, resulting in noiseless operation of the machine.
  • the principle of low-frequency compacting movements has been further developed in an apparatus in which the core-forming mandrels are provided with conical or wedge-shaped surfaces, whereby concrete is compacted by means of slow longitudinal movements of the mandrels.
  • the compaction is performed using reciprocating movement with an amplitude of 5 - 50 mm and a frequency of 1 - 10 Hz, which are slow relative to the amplitudes and frequencies used in vibrating.
  • the machine uses wedge-shaped or conical mandrel surfaces which provide flaring or tapering spaces in the direction of the casting flow, said spaces acting as compacting spaces.
  • the invention is based on implementing the compaction of concrete using at least one direction-controlled compacting movement having simultaneously one directional vector component parallel to the flow of the concrete mix and one directional vector component transverse to the flow of the concrete mix.
  • the concrete mix to be moulded is subjected to at least one second compacting movement with a frequency different from that of a first dual-direction-controlled compacting movement.
  • the invention provides significant benefits.
  • Compaction is advantageously performed using a number of different vibrating frequencies, and particularly, complementing the mechanical low-frequency compacting movement with a number of higher-frequency vibrations, whereby the compacting effect is imposed on aggregate particles of all sizes.
  • this basic scheme is combined with direction-controlled application of the compacting effect and the dual-direction-controlled compacting movement according to the invention, the most effective compaction possible is achieved that reliably produces concrete grades of the highest strength.
  • the compaction result can be further improved by applying the compacting effect on a number of vibrating and mechanically compacting frequencies; however, the effect of multiple frequencies is not as significant as that of the dual-direction compacting movement.
  • the longitudinal vibration combined with the cross-machine compacting movement achieves easy flow of concrete through the casting nozzle, whereby the wear of machine components remains small and no excessive internal pressure is generated inside the casting machine. In comparison with a mechanical compacting movement at a low frequency, the large-amplitude movements working and wearing the concrete mix can be avoided.
  • the multi-directional compaction scheme By virtue of the multi-directional compaction scheme, shaped objects of a more complicated structure than in the prior art can be moulded, and provided that the auger of the casting machine is equipped with a vibrating means, the flow of the concrete mix along the augers is eased and the wear of the augers reduced.
  • the vibrating frequencies of the apparatus are advantageously made adjustable, whereby the vibrations applied at different frequencies can be tuned according to the natural frequencies of the different aggregate particles, whereby the optimal efficiency of energy transfer into the concrete mix is achieved resulting in the most effective compaction.
  • the machine according to the invention is an extruder-type casting machine adapted to run along the sides of a casting mould 1 supported by load-bearing wheels 2.
  • the machine is assembled onto a frame 3.
  • the exemplifying casting machine has three conical feed augers 5.
  • the augers 5 are mounted on the frame 3 by means of a drive shaft 7 of the auger.
  • Core-forming mandrels 6 are placed to the trailing end of the feed augers 5 relative to the casting direction.
  • a pull rod 10 adapted to pass through the center of each auger shaft 7 is actuated by a hydraulic cylinder 11 powered by hydraulic machinery 12 via a hydraulic fluid distributing block 12.
  • the end of the drive shaft 7 is provided with a variable-speed reduction gear 8 via which the drive motors 9 of the augers 5 are connected to the auger drive shaft 7.
  • the top of the machine carries a conical feed hopper 4.
  • a mould top plate 16 Next to the feed hopper 4, at the opposite end of the machine relative to the casting direction, above the machine, are located a mould top plate 16, and at the sides, mould side plates 15, respectively.
  • the side plates 15 are connected to hydraulic cylinders 11.
  • the top plate 16 is connected by means of link mechanism 20 to a drive means of the top plate.
  • the dual-direction compacting movement according to the invention is accomplished by means of link mechanisms 18 and 19.1, 19.2.
  • the drive shaft 7 is supported by two links 18.
  • the link mechanism 18 supporting the drive shaft 7, the feed auger 5 and the core-forming mandrel 6 forces these supported components to move forward and downward, or respectively during the opposite-direction movement backward and upward, whereby the concrete mix contained in the extruder section is subjected to a dual-direction-controlled compacting movement.
  • the other limit position of the mechanism 18 is shown by a dashed line in the diagram of Fig. 3.
  • the same compacting movement is also implemented in the mould top plate 16 supported by the link mechanisms 19.1, 19.2 when the crank lever of the link mechanism 20 moves the mould top plate 16 reciprocatingly.
  • the function of the apparatus is as follows. Concrete mix poured into the feed hopper 4 flows by gravity onto the feed augers 5 rotated by the drive motor 9. The rotating augers 5 propel the concrete mix into a pressurized space continued as the shaping space delineated by the mould 1, the mould side walls 15 and the mould top plate 16. In this space the concrete mix is forced into the space between the core-forming mandrels 6 and the walls 1, 15, 16, where the concrete mix is compacted under the forces of the compacting movements and the internal pressure generated by the core-forming mandrels 6, the moving walls 15, 1, and is thus shaped into the continuous section of the desired end product such as a hollow-core beam, for instance.
  • the reciprocating movement of the core-forming mandrels 6 is provided by the hydraulic cylinder 11 which is connected to the end of the pull rod 10.
  • the casting machine travels along a platform 1 on wheels 2 propelled by the reaction forces of the extruded concrete mix, or alternatively, the machine can be moved by a separate drive motor.
  • Concrete mix poured in the feed hopper 4 flows by gravity onto the feed augers 5 which propel the concrete mix into the shaping space delineated by the mould walls 1, 15 and 16, thus producing the required internal pressure for moulding.
  • the augers 5 may be arranged to perform a direction-controlled vibrating movement together with the core-forming mandrels 6, whereby the flow of the concrete mix along the flight surface of the auger 5 is eased thus aiding the feed of the concrete mix.
  • the augers 5 are continued as the core-forming mandrels 6 which form the hollow-core cavities 21 required in the end product.
  • FIG. 4 Compaction of concrete occurs mainly under the effect of these core-forming mandrels 6.
  • the compacting effect is achieved by the direction-controlled vibration of the mandrels 6, advantageously using the reciprocatingly curved swinging movement described above.
  • the mandrel may have a constant cross section if permitted by the cross-sectional shape of the core cavities, since the reciprocating compaction movement also imparts a cross-machine compacting component.
  • the mandrel may obviously rotate with the auger, while for noncylindrically shaped core cavities a nonrotating mandrel must be used.
  • the mandrel cross section may be shaped as tapering or flaring.
  • the direction-controlled compacting vibration permits very large deformations in the flow of the concrete mix.
  • the augers 5 are rotated by the drive shaft 7 and the mandrels 6 are moved with the help of rods 10 adapted to pass through the center of the drive shafts. Besides their rotational movement, the augers 5 can be adapted to perform a compacting movement, whereby their actuation can be combined with the movement of the rods 10.
  • the rotation of the augers 5 is arranged by means of a drive belt 8 or alternatively a drive chain, and the drive motor is advantageously a hydraulic motor whose speed of rotation is easy to control. Alternatively, an electric motor with a reduction gear can be used.
  • the hydraulic actuator cylinder 11 and pull rod 10 of the mandrels impart the mandrels with the desired direction-controlled vibrating movement, and when the vibrating movement is also desired for the augers 5, they are locked with the help of a lateral-load taking end bearing to the pull rods 10 of the mandrel 6.
  • the hydraulic cylinders 11 the mandrels 6 can be actuated with a constant force and constant acceleration, which is advantageous with regard to minimizing the stresses imposed on the machine structures.
  • the hydraulic cylinders can be replaced by other types of actuators such as eccentric cam mechanisms and other devices capable of generating an essentially sinusoidally varying acceleration.
  • the machinery output power is controlled in hydraulic pulses to the different vibrating actuators.
  • the hydraulic drive pulses should be properly phased.
  • the vibrating frequency can be varied by suitable control of the hydraulic fluid distributing block, while the vibrating force is adjusted by varying the operating pressure of the hydraulic actuators.
  • the compaction movement according to the present invention occurs in the form of an accurate direction-controlled vibrating movement in lieu of low-frequency shearing compaction.
  • the borderline between shearing compaction and vibrating compaction is difficult to define, and therefore, the appropriate vibrating frequency for each case is essentially dependent on the properties of the concrete mix to be cast.
  • the vibrating frequency for concrete is in the order of 12.5 - 200 Hz.
  • the vibrating frequency of the mandrel section has been found to advantageously lie in the range 12.5 - 50 Hz, and of the mould top and side plates, in the range 5 - 10 Hz. This combination of two different frequencies is particularly advantageous as the vibrating effect is then imposed on aggregate particles of widely varying size.
  • the drive elements can be any power actuators capable of delivering the required output power. In the above applications, however, electric or hydraulic motors are superior.
  • the conversion of a rotational movement into a linear cyclically reciprocating motion can be implemented in different ways using, e.g., a crank lever or eccentric cam and follower mechanism. All drive elements are advantageously controllable.
  • the direction of the compaction movement can be controlled by varying the lengths and directions of the links in the supporting link mechanism. If the links are directed slightly backward with respect to the casting flow direction, the swing movement occurs downward, whereby the compaction effect imparted by the mandrels, for instance, becomes more pronounce in the concrete mix located below the mandrels. Correspondingly, by aligning the links slightly forward tilted along the casting flow direction, the compaction movement can be forced to occur upward directed. Furthermore, the trajectory of the compaction movement of the link mechanism can be varied by modifying the lengths of the links, and in fact, the links of any link mechanism can have different lengths.
  • the trajectory of the compacting elements can be varied in a similar manner.
  • other equivalent types of movement controlling means such as guide rails can be used permitting the implementation of almost any conceivable shape of compaction trajectory.
  • the mould side plates are moved only longitudinally with respect to the casting flow direction, it is conceivable that at least some of the mould side plates are connected to an eccentric mechanism capable of imparting a vertical or lateral movement. Also the other compaction movements can be implemented so that transverse compaction movement relative to the casting flow direction occurs in the horizontal plane. Moreover, an eccentric mass vibrator 17 can be placed inside the core-forming mandrels, whereby the compaction effect is further improved and the flow of the concrete mix eased. The compaction movement or compaction efficiency can be controlled by varying the speed, stroke length or input power of the compaction movement.

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  • 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)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
EP95850070A 1994-04-07 1995-04-06 Procédé et dispositif pour la fabrication d'éléments en béton Expired - Lifetime EP0677362B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI941608 1994-04-07
FI941608A FI110174B (fi) 1994-04-07 1994-04-07 Laite betonituotteen valmistamiseksi

Publications (2)

Publication Number Publication Date
EP0677362A1 true EP0677362A1 (fr) 1995-10-18
EP0677362B1 EP0677362B1 (fr) 2001-12-05

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ID=8540474

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Application Number Title Priority Date Filing Date
EP95850070A Expired - Lifetime EP0677362B1 (fr) 1994-04-07 1995-04-06 Procédé et dispositif pour la fabrication d'éléments en béton

Country Status (10)

Country Link
EP (1) EP0677362B1 (fr)
JP (1) JPH0834009A (fr)
KR (1) KR950031417A (fr)
CN (1) CN1048209C (fr)
AT (1) ATE210009T1 (fr)
DE (1) DE69524279T2 (fr)
ES (1) ES2168348T3 (fr)
FI (1) FI110174B (fr)
MY (1) MY118474A (fr)
NO (1) NO302456B1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1033213A2 (fr) * 1999-03-02 2000-09-06 Valkeakoski X-Tec Oy Ltd. Assemblage et méthode pour générer un mouvement de compactage dans un dispositif de moulage de produit en béton
WO2001014114A1 (fr) * 1999-08-23 2001-03-01 Valkeakoski X-Tec Oy Ltd Procede et appareil permettant de fabriquer un produit en beton et serie de produits en beton
WO2004020165A1 (fr) * 2002-09-02 2004-03-11 Consolis Technology Oy Ab Procede et appareil pour fabriquer un produit en beton a noyau creux
EP1513663A1 (fr) * 2002-06-07 2005-03-16 Consolis Technology Oy Ab Procede et dispositif servant a couler un produit creux en beton
EP1952961A3 (fr) * 2007-02-05 2010-09-08 Elematic Oy Ab Procédé et appareil de coulage de produits en beton
EP2130655A3 (fr) * 2008-06-03 2011-06-01 Elematic Group Oy Procédé et appareil pour mouler un produit de béton
US8246877B2 (en) 2005-01-07 2012-08-21 Elematic Oy Ab Method, apparatus and a forming part for casting a concrete product by slipform casting
CZ304194B6 (cs) * 2001-01-23 2013-12-27 Schöck Bauteile GmbH Stavební dílec pro tepelnou izolaci mezi dvěma stavebními částmi
US10434681B2 (en) 2015-01-27 2019-10-08 Elematic Oyj Method and apparatus for casting concrete products
CN113246289A (zh) * 2021-05-26 2021-08-13 张登登 一种型钢混凝土预制柱自动化成型系统

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007114795A1 (fr) * 2006-04-03 2007-10-11 National University Of Singapore Procédé et système permettant de concevoir un panneau de béton alvéolaire
FI125597B (en) 2007-05-09 2015-12-15 Elematic Oyj Method and apparatus for casting concrete products
CN103231438B (zh) * 2013-03-28 2015-12-02 南京环力重工机械有限公司 混凝土空心板挤出机
CN107188611B (zh) * 2017-07-06 2023-01-20 吴泉兴 一种混凝土智能养护设备以及养护方法
CN110344329A (zh) * 2019-06-18 2019-10-18 北京碧鑫水务有限公司 桥梁施工捣振装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH477964A (fr) * 1968-01-23 1969-09-15 Beam British Engineering Appli Maschine mobile pour la fabrication en continu de poutrelles en béton
SU1046102A1 (ru) * 1982-04-12 1983-10-07 Ярославский политехнический институт Устройство дл уплотнени бетонной смеси
EP0175930A2 (fr) * 1984-08-24 1986-04-02 Lohja Parma Engineering Lpe Oy Procédé et dispositif pour la fabrication de plaques creuses et d'éléments de construction semblables de préférence en béton
EP0192884A1 (fr) * 1984-11-08 1986-09-03 Oy Partek Ab Procédé et dispositif à filer les produits creux en béton
EP0229751A2 (fr) * 1986-01-17 1987-07-22 Kt-Suunnittelu Oy Machine à coffrages glissants pour la fabrication éléments creux en béton
EP0241172A2 (fr) * 1986-04-07 1987-10-14 Lohja Parma Engineering Lpe Oy Procédé et machine fileuse pour mouler des panneaux en béton
SU1405993A1 (ru) * 1986-06-24 1988-06-30 Ярославский политехнический институт Устройство дл уплотнени бетонной смеси

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH477964A (fr) * 1968-01-23 1969-09-15 Beam British Engineering Appli Maschine mobile pour la fabrication en continu de poutrelles en béton
SU1046102A1 (ru) * 1982-04-12 1983-10-07 Ярославский политехнический институт Устройство дл уплотнени бетонной смеси
EP0175930A2 (fr) * 1984-08-24 1986-04-02 Lohja Parma Engineering Lpe Oy Procédé et dispositif pour la fabrication de plaques creuses et d'éléments de construction semblables de préférence en béton
EP0192884A1 (fr) * 1984-11-08 1986-09-03 Oy Partek Ab Procédé et dispositif à filer les produits creux en béton
EP0229751A2 (fr) * 1986-01-17 1987-07-22 Kt-Suunnittelu Oy Machine à coffrages glissants pour la fabrication éléments creux en béton
EP0241172A2 (fr) * 1986-04-07 1987-10-14 Lohja Parma Engineering Lpe Oy Procédé et machine fileuse pour mouler des panneaux en béton
SU1405993A1 (ru) * 1986-06-24 1988-06-30 Ярославский политехнический институт Устройство дл уплотнени бетонной смеси

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED Week 8425, 1 August 1984 Derwent World Patents Index; AN 84-157227/25 *
SOVIET PATENTS ABSTRACTS Week 8901, 15 February 1989 Derwent World Patents Index; AN 89-006824/01 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1033213A2 (fr) * 1999-03-02 2000-09-06 Valkeakoski X-Tec Oy Ltd. Assemblage et méthode pour générer un mouvement de compactage dans un dispositif de moulage de produit en béton
EP1033213A3 (fr) * 1999-03-02 2002-11-13 Valkeakoski X-Tec Oy Ltd. Assemblage et méthode pour générer un mouvement de compactage dans un dispositif de moulage de produit en béton
WO2001014114A1 (fr) * 1999-08-23 2001-03-01 Valkeakoski X-Tec Oy Ltd Procede et appareil permettant de fabriquer un produit en beton et serie de produits en beton
CZ304194B6 (cs) * 2001-01-23 2013-12-27 Schöck Bauteile GmbH Stavební dílec pro tepelnou izolaci mezi dvěma stavebními částmi
EP1513663A1 (fr) * 2002-06-07 2005-03-16 Consolis Technology Oy Ab Procede et dispositif servant a couler un produit creux en beton
WO2004020165A1 (fr) * 2002-09-02 2004-03-11 Consolis Technology Oy Ab Procede et appareil pour fabriquer un produit en beton a noyau creux
AU2003258744B2 (en) * 2002-09-02 2008-11-06 Elematic Oy Ab. Method and apparatus for fabricating a hollow-core concrete product
US8246877B2 (en) 2005-01-07 2012-08-21 Elematic Oy Ab Method, apparatus and a forming part for casting a concrete product by slipform casting
EP1952961A3 (fr) * 2007-02-05 2010-09-08 Elematic Oy Ab Procédé et appareil de coulage de produits en beton
EP2130655A3 (fr) * 2008-06-03 2011-06-01 Elematic Group Oy Procédé et appareil pour mouler un produit de béton
US10434681B2 (en) 2015-01-27 2019-10-08 Elematic Oyj Method and apparatus for casting concrete products
CN113246289A (zh) * 2021-05-26 2021-08-13 张登登 一种型钢混凝土预制柱自动化成型系统

Also Published As

Publication number Publication date
NO302456B1 (no) 1998-03-09
FI110174B (fi) 2002-12-13
CN1048209C (zh) 2000-01-12
ES2168348T3 (es) 2002-06-16
KR950031417A (ko) 1995-12-18
ATE210009T1 (de) 2001-12-15
MY118474A (en) 2004-11-30
DE69524279T2 (de) 2002-08-14
JPH0834009A (ja) 1996-02-06
FI941608A0 (fi) 1994-04-07
CN1121459A (zh) 1996-05-01
FI941608A (fi) 1995-10-08
NO951295D0 (no) 1995-04-04
NO951295L (no) 1995-10-09
EP0677362B1 (fr) 2001-12-05
DE69524279D1 (de) 2002-01-17

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