EP2416933B1 - Coffrage pour une pièce en béton de précision formant une traverse de chemin de fer - Google Patents

Coffrage pour une pièce en béton de précision formant une traverse de chemin de fer Download PDF

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Publication number
EP2416933B1
EP2416933B1 EP10718447.5A EP10718447A EP2416933B1 EP 2416933 B1 EP2416933 B1 EP 2416933B1 EP 10718447 A EP10718447 A EP 10718447A EP 2416933 B1 EP2416933 B1 EP 2416933B1
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EP
European Patent Office
Prior art keywords
formwork
wall
moulded part
concrete
precision
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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
EP10718447.5A
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German (de)
English (en)
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EP2416933A1 (fr
Inventor
Stephan Sehliger
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Individual
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Individual
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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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • B28B7/364—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article of plastic material or rubber
    • 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/346—Manufacture of moulds

Definitions

  • the invention relates to a formwork for concrete parts.
  • the concrete parts are railway sleepers, as used in track construction.
  • This formwork consists of a universal clamping frame, which is designed so stable that it is able to absorb the biasing forces of tension wires, and from an insertable into the tenter formwork element, which is used for shaping the concrete sleeper. Because the shuttering elements of different types of sleepers are interchangeable, a plurality of differently shaped sleepers can be produced with the aid of only one universal clamping frame. In this case, the molded part itself, having the precision surface for the support surface of the rails on the finished railway sleeper, designed as a casting molded by means of a master mold in large numbers and thus urgeformt
  • a method for producing a concrete element using a mold in which a soft molding compound consisting of a granular material such as sand or sawdust or the like mixed with a binder is first introduced into a mold holder and then cured therein. After curing, the shape of the concrete element is milled out of the hardened molding material on the basis of stored shape data by computer-controlled milling so that the shape suitable for the concrete element to be produced is obtained, the mold thus produced comprising the mold holder and the milled molding compound. Thereafter, the soft concrete and possibly a reinforcement for producing the concrete element can be filled into the mold. In the subsequent step of the process, the concrete cures in the mold and the Cured concrete element can then be removed from the mold.
  • a soft molding compound consisting of a granular material such as sand or sawdust or the like mixed with a binder is first introduced into a mold holder and then cured therein. After curing, the shape of the concrete element is milled out of the hardened molding material on
  • the DE 36 03 527 A1 describes a method for producing a mold from an organic polymeric material in liquid form, which is poured into a space, such as a box-shaped container which is open at the top and which corresponds to the dimensions of the desired mold, and hardens there. After hardening, the blank thus produced is machined with a computer controlled machine tool to produce the desired shape.
  • the GB 2 113 600 A discloses a multi-part formwork, wherein a lower part comprises a molded part and another part with openings in the form of holes for passing tendons, which extends from the lower part upwards, and is detachably connected thereto.
  • formwork for the production of concrete sleepers.
  • Flowable concrete is poured into a mold cavity of the formwork and then solidifies to form in this way the railway sleeper, whose shape is determined by the inner contour of the formwork, so by the topography of the formwork, which is directed to the mold cavity.
  • the formwork in which a threshold is made, composed of several components and prepared accordingly for the casting process.
  • the thresholds mentioned are prestressed concrete components with at least one bearing surface for the rail body, wherein the bearing surface is particular Requirements are made in terms of manufacturing tolerances.
  • railway sleeper in practice usual component length of the railway sleeper of about 2.60 m - in the range of a few tenths of a millimeter, so that the railway sleeper is referred to as a precision concrete part, since the bearing surfaces represent areas whose shape and Position must be within high precision within the specified, tight tolerances.
  • Formwork with a precise surface of the mold cavity for example, be created by the fact that they are machined including their precision surfaces of a steel block.
  • a type-related formwork is created, which is only suitable for the production of a single specific type of railway sleeper and for this type has a defined, precise topography, which allows the production of correspondingly precise railway sleepers.
  • a correspondingly large number of such type-related formworks would be required, which would have a significant adverse effect on the manufacture of railway sleepers.
  • interchangeable Inserts are provided to provide, for example, different logos in the manhole covers. These inserts are roughly comparable to the mentioned bead plates, as they are interchangeable provided in the formwork. Neither they are firmly connected to the rest of the plastic molding, nor with the stable wall in the form of the metal ring.
  • the invention is therefore based on the object to improve a generic formwork to the effect that it allows the reliable manufacturing process of a dimensionally accurate precision concrete part without costly introduction of the topography of the casting to be produced influencing additional parts.
  • the invention proposes to design a formwork for a precision concrete part constructed as a multi-part, but one-piece to handle mold, in a conventional manner, firstly a stable formwork wall is provided, which ensures the basic dimensional stability of the formwork, and secondly in a likewise known manner, a molded part is provided, which is firmly connected to the wall and forms a precision surface as part of the shaping topography of the formwork.
  • This precision surface ensures that the corresponding areas of the railway sleeper, which must be particularly precise in terms of their shape and position, are manufactured with the required precision, for example, the mentioned bearing surfaces on which rest at the finished railway sleeper, the rails of the track.
  • a formwork according to the invention not only allows a considerably easier production of railway sleepers, but also a high degree of repeatability, since the areas designated as precision surfaces, which form the bearing surfaces of a casting, are firmly integrated into a molded part. This can also be effectively avoided manufacturing errors that might otherwise arise, for example, in the case of spalling on the casting: at points where the initially liquid concrete penetrates into insufficiently sealed cavities under or behind the bead plates, later spalling, if after solidification of the Concrete the railway sleeper is removed from the formwork, as these undercut-like areas of the railway sleeper cancel during molding. It can not be ruled out that not only an undesired, protruding portion of the concrete breaks off, but the breaking edge runs within the desired per se contour of the railway sleeper, so that other material breaks out, which can cause a clearly visible damage to the casting.
  • the molded part may advantageously consist of a material that does not meet the mechanical requirements that are to be placed on a formwork for casting concrete railway sleepers. This required stability is ensured according to the proposal by the outer stable wall, which supports the molding to the outside and may for example consist of steel.
  • the shuttering wall made of steel.
  • other suitable materials may be used to make the wall.
  • the wall absorbs the tensional forces of tendons in the manufacture of prestressed concrete components.
  • a rod-shaped auxiliary means in the molded part, which extends upright from the mold piece in the formwork.
  • Such a thing Aid can be used to hold a threaded bushing or the like pushed onto it, which is used by way of example for fastening the rail holder to a railway sleeper and is cast into the casting for this purpose.
  • the molding itself is designed as a casting. It is not worked out by means of a machining process from a solid, but can be poured by means of a so-called master mold in large numbers and thus urgeformt. This allows a low-cost and easy production of a proposed formwork.
  • the complicated, relief-like surface shape which may have a precision surface, it is advantageous to design the molded part as a casting. If the requirements for the surface shape change, for example, according to customer requirements, then it is not cumbersome to recreate or rework the individual complicated formwork, but merely a new master mold, from which the molded parts can be poured off.
  • the molded part is poured directly into the formwork wall. This allows a firm bond between the molding and the wall waiving other fasteners.
  • the molding is connected after solidification with the wall so that it is secured against separating forces, as they can occur, for example, when the casting from the formwork dissolved out or the formwork for the purpose the compaction of the concrete is shaken.
  • a rough surface of the wall can advantageously support the solid bond with the molded part.
  • the molding is placed in the formwork and cast around with a cast material.
  • the molding used can in turn be produced by casting as well as other manufacturing processes. In this way, the advantages of the molding-wall composite and the material properties of used for the molding, non-pourable material can be combined in a formwork.
  • holding elements can be provided which extend from the wall or from the bottom of the formwork into the material of the shaped part.
  • An exemplary embodiment would be embedded in the wall or floor, with its free part in the formwork interior extending hook or a corresponding fixed, extending from wall to wall perforated steel sheet, which is enclosed by the liquid molding material and after the solidification of a positive connection with the holding element received.
  • This positive connection makes it possible to secure the molded part against the aforementioned separation forces.
  • Such a holding element can advantageously significantly increase the torsional rigidity of a formwork according to the proposal, especially in the case of a formwork design without a bottom.
  • the molding may contain polyurethane, and particularly advantageous, for example, at the contact surface, which with the Concrete comes into contact.
  • polyurethane especially advantageous, for example, at the contact surface, which with the Concrete comes into contact.
  • the casting so the railway sleeper, after curing very easy to separate from the fitting.
  • the fitting completely made of polyurethane, so it can be easily produced by a casting process.
  • it can be provided to use other, pourable plastics for the production of the molded part.
  • the hardness of the plastic can advantageously be in the range of 60 to 100 Shore A, in order to ensure the desired precision of the formwork topography and thus of the casting produced later.
  • the molding can contain polymer concrete.
  • Polymer concrete has a fine poredness, which makes it possible to produce a molded part with a good surface quality. This material is particularly suitable for a casting process and hardens quickly.
  • a molding made of polymer concrete can be produced in the same processing plant as a casting to be produced with the formwork, so that the costs of providing such a molding can advantageously be kept low.
  • Concrete sleepers for track construction represent typical precision concrete parts, in the manufacture of which the advantages of the proposed formwork can be optimally utilized.
  • the very tight component tolerances, especially in the support areas, make high demands on a formwork, which are met by a formwork according to the invention.
  • the formwork is designed in several parts, in such a way that a lower part of the topography of the molding and a part extending above forms the height of the casting - similar to a structure of a mold with upper and lower case.
  • the two parts can be made of different materials. In any case, the formwork remains in one piece manageable.
  • the two parts are releasably connected together and the upper part has an abutment for steel cables or other tendons when the formwork is used to make a prestressed concrete casting.
  • This embodiment is particularly advantageous because the same top boxes can be used for different, order-related varying moldings, which can offer advantages through simplified storage.
  • the formwork according to the invention can be used particularly advantageously for the production of prestressed concrete sleepers for track construction.
  • This embodiment with a stable, torsion-resistant wall, in which the tendons can be set, allows particularly advantageous the particularly good shape and repeatability.
  • a kit for a formwork has a master mold from which the molding is poured. This allows a low-cost and easy production of a molded part and thus also a formwork. Changing requirements for the topography of the formwork can be responded to quickly by refactoring a master form and, for example, a customer request can be met.
  • Fig. 1 is a formwork 1 shown for the production of railway sleepers. It has three mold cavities and a - here exemplary circulating - stable wall 2. Openings 3 in the form of holes are for the passage of in Fig. 6 provided tendons 4, so that the formwork 1 can be used for the production of prestressed concrete precision parts.
  • Each mold cavity has a molded part 5, each with two precision surfaces 6.
  • Each precision surface 6 is followed by an upwardly extending, rod-shaped aid 7, which is provided for receiving a threaded bush, so that this threaded bushing can be cast into the concrete casting to be produced, which in Fig. 1 not shown, but in Fig. 6 can be seen and designated 8.
  • Fig. 2 shows a longitudinal section through the left half of a formwork 1 in the region of the mold cavity, wherein the formwork 1 is used to produce a railway sleeper.
  • the formwork 1 has a one-piece, molded molded part 5 made of polyurethane, which has two symmetrically arranged precision surfaces 6, of which only one is shown.
  • the molding 5 extends in its near-wall sections over the entire height of the formwork 1 and is surrounded by a wall 2, which forms side walls and a bottom.
  • the molded part 5 is here directly in the Wall 2 of the formwork 1 poured and thus received a solid, non-positive bond with the wall. 2
  • the formwork 1 has a anchored in the wall 2 and in the bottom of the formwork 1 holding element 9 in the form of a close to the ground through the entire mold part 5 extending perforated plate, which was enclosed during pouring the still liquid material of the molded part 5 of this and when solidifying a Positive connection between the wall 2 and the molding 5 creates, which secures the molding 5 against separating forces, such as when dissolving the casting 8, not shown here from the formwork 1 or when shaking the formwork 1 for compacting the still liquid casting 8 between wall 2 can act.
  • Fig. 3 shows a longitudinal section similar Fig. 2 , however, by the right half of a formwork 1, as well as a detail enlargement.
  • the molding 5 is in this embodiment not exclusively of plastic, but of a polymer concrete.
  • the formwork 1 has a anchored in the wall 2 of the formwork 1 holding element 9 in the form of a extending through the entire mold part 5 perforated plate, which was enclosed during the pouring of the still liquid material of the molded part 5 of this and during solidification a positive connection between the wall 2 and the molding 5 creates, which secures the molded part 5 against separating forces, as they can act, for example, when dissolving the casting 8, not shown here from the formwork 1 or when shaking the formwork 1 for compressing the still liquid casting 8 between wall 2.
  • the enlarged detail of a corner region of the formwork 1 shows the bond between the molded part 5 and the wall 2, in which the holding element 9 is anchored in the form of a perforated plate and which, for example, parallel to Supporting surface of the formwork 1 extending, extends through the molded part 5.
  • Fig. 4 also shows a longitudinal section through a formwork 1 for the production of railway sleepers, but only through a left half of the formwork 1, wherein a multi-part embodiment of the formwork 1 according to the invention is provided. It has a wall 2, which forms a bottom and the lower portion of a circumferential wall, and which rotates about a arranged in the lower region of the formwork 1 molded part 5 made of polyurethane.
  • An above it flat subsequent part of the formwork 1 is made of steel and is provided with openings 3 in the form of holes for passing through tendons 4, not shown.
  • Upper and lower part of the formwork 1 each have a flange, via which the two parts are bolted together, clamped or otherwise releasably connected.
  • the design of the upper side is determined by the molded part 5, with the corresponding precision, while the design of the circumferential side and end faces of the railway sleeper are largely determined by the upper, made of steel part of the formwork 1, the comparatively inexpensively can be produced as a rotating frame and only has to comply with relatively low precision requirements.
  • Fig. 5 also shows a longitudinal section through a formwork 1 for the production of railway sleepers, but only through a right half of the formwork 1.
  • the molding 5 is made of polymer concrete.
  • the formwork 1 has a wall 2, which forms a bottom below the molding 5, laterally revolves around the molding 5, and extends beyond the molding 5 also upwards.
  • the molded part 5 is arranged in the lower region of the formwork 1, and above it is flush with the mold part 5, an upper part of the formwork 1 made of steel, around which the wall 2 also rotates, and which with openings 3 in the form of holes for passing is provided by tendons 4, not shown.
  • a circumferential edge or groove on the casting 8 arise, which - also deliberately highlighted - when installing the railway sleeper in the track bed can be used advantageously as a leveling aid for aligning the railway sleeper.
  • Fig. 6 also shows a longitudinal section through a formwork 1, with a one-piece, molded molding 5 made of polyurethane, which has two precision surfaces 6 and extends in its near-wall sections over the entire height of the formwork 1, and with a wall 2, which is similar to the wall of the second out Fig. 3 is configured, but consists of several parts and includes a bottom which is fixedly connected to side parts of the wall 2, namely welded in the illustrated embodiment.
  • the molded part 5 is cast here directly into the wall 2 of the formwork 1 and thus has a frictional bond with the wall 2.
  • a casting 8 made of prestressed concrete in the form of a single-block railway sleepers.
  • the formwork 1 is in the tensioned state and the outside of the wall 2 fixed tendons 4 are indicated by center lines.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Claims (7)

  1. Coffrage (1) pour la fabrication d'une traverse ferroviaire en béton, sachant que le coffrage (1) présente un espace creux de moule dans lequel du béton peut être rempli pour créer la traverse ferroviaire, la topographie du coffrage (1) dirigée vers l'espace creux de moule détermine la forme extérieure de la traverse ferroviaire à fabriquer désignée en tant que pièce de béton de précision, le coffrage (1) présente une surface de précision (6) qui détermine la surface d'un tronçon de la traverse ferroviaire à fabriquer, à réaliser avec de faibles tolérances, le coffrage (1) présente une paroi (2) extérieure stable, et la surface de précision (6) ainsi qu'une partie de la topographie du coffrage (1) dirigée vers l'espace creux de moule, en saillie sur la surface de précision (6), sont formées par une pièce moulée (5) qui est reliée fixement à la paroi (2), sachant que la pièce moulée (5) est conçue en tant que pièce de fonderie et
    caractérisé en ce que
    la pièce moulée (5) est coulée dans la paroi (2) du coffrage (1) entourant la pièce moulée (5),
    le coffrage (1) est conçu en plusieurs pièces, de telle sorte qu'une partie inférieure présente la pièce moulée (5) et une autre partie avec des évidements (3) sous forme de perçages pour faire passer des membres de tension, s'étend vers le haut depuis la partie inférieure et est reliée de façon séparable à celle-ci.
  2. Coffrage selon la revendication 1,
    caractérisé par
    un élément de fixation (9) qui s'étend de la paroi (2) dans le matériau de la pièce moulée (5) et crée un engagement positif de telle sorte que la pièce moulée (5) est assurée contre des forces séparant la pièce moulée (5) de la paroi (2).
  3. Coffrage selon la revendication 1,
    caractérisé par
    un élément de fixation (9) qui s'étend d'un fond du coffrage dans le matériau de la pièce moulée (5) et crée un engagement positif de telle sorte que la pièce moulée (5) est assurée contre des forces séparant la pièce moulée (5) du fond.
  4. Coffrage selon l'une des revendications 2 ou 3,
    caractérisé en ce que
    la pièce moulée (5) contient du polyuréthane.
  5. Coffrage selon l'une des revendications précédentes,
    caractérisé en ce qu'
    il est conçu en tant que coffrage (1) pour fabriquer des pièces coulées en béton précontraint.
  6. Coffrage selon l'une des revendications précédentes,
    caractérisé en ce que
    la pièce moulée (5) est en plastique.
  7. Coffrage selon la revendication 6,
    caractérisé en ce que
    la pièce moulée (5) présente une dureté de 60 à 100 shore A.
EP10718447.5A 2009-04-09 2010-04-09 Coffrage pour une pièce en béton de précision formant une traverse de chemin de fer Not-in-force EP2416933B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910016804 DE102009016804A1 (de) 2009-04-09 2009-04-09 Schalung für Präzisions-Betonteile
PCT/DE2010/000400 WO2010127652A1 (fr) 2009-04-09 2010-04-09 Coffrage pour une pièce en béton de précision formant une traverse de chemin de fer

Publications (2)

Publication Number Publication Date
EP2416933A1 EP2416933A1 (fr) 2012-02-15
EP2416933B1 true EP2416933B1 (fr) 2015-08-05

Family

ID=42541545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10718447.5A Not-in-force EP2416933B1 (fr) 2009-04-09 2010-04-09 Coffrage pour une pièce en béton de précision formant une traverse de chemin de fer

Country Status (3)

Country Link
EP (1) EP2416933B1 (fr)
DE (1) DE102009016804A1 (fr)
WO (1) WO2010127652A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013166242A1 (fr) 2012-05-03 2013-11-07 Hawkeye Concrete Products Co. Plaques composites pour tuyau en béton
US9469053B2 (en) 2014-01-23 2016-10-18 Hawkeye Concrete Products Co. Composite pallet for concrete pipe
EP3096928A1 (fr) * 2014-01-23 2016-11-30 Hawkeye Concrete Products Co. Plaque composite pour tuyau en béton
CN108394006A (zh) * 2018-03-12 2018-08-14 天津银龙预应力材料股份有限公司 多组生产式高效轨枕模
CN108394012A (zh) * 2018-03-12 2018-08-14 天津银龙预应力材料股份有限公司 轨枕自动化生产装置

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GB2113600A (en) * 1982-01-21 1983-08-10 Vagneux Traverses Beton Assembly for casting elements in prestressed reinforced concrete, particularly beams, and process for making such elements
DE3603527A1 (de) * 1985-02-13 1986-08-14 MNK-Rakennus OY, Tampere Verfahren zur herstellung von gussformen
NL1034417C1 (nl) * 2007-09-21 2009-03-24 Leenstra Machine En Staalbouw Werkwijze voor het met behulp van een mal vervaardigen van een betonelement.

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US3883109A (en) * 1967-10-06 1975-05-13 Pre Cast Concrete Products Lim Mold for making meter box covers and the like
DE3735806C1 (de) * 1987-10-22 1989-02-02 Klaus Dittmann Verfahren zur automatischen Herstellung von Sonderteilen aus Beton oder Stahlbeton
DE9015165U1 (de) * 1990-11-03 1991-01-17 Schwellenwerk Stewing GmbH & Co., 3394 Langelsheim Formenauflager für Betonschwellen, insbes. Spannbetonschwellen
EP0592695A1 (fr) * 1992-10-08 1994-04-20 Wayss & Freytag Aktiengesellschaft Coffrage pour éléments moulés en béton précontraint
DE19826954C2 (de) * 1998-06-17 2003-05-08 Pfleiderer Infrastrukturt Gmbh Mehrfachform zur Herstellung von Betonschwellen
US20060038107A1 (en) * 2004-08-20 2006-02-23 Kyozaburo Takagi Bulkheads and methods of fabricating a panel with a mitered corner
DE102006026139A1 (de) * 2006-06-03 2007-12-06 Kobra Formen Gmbh Anordnung zur Herstellung von Betonformsteinen und Form für eine solche Anordnung
DE202008012108U1 (de) * 2008-09-12 2008-11-13 Robatex Gmbh Formkörper für lichtleitende Betonelemente mit definierter Einzelfaseranordnung

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Publication number Priority date Publication date Assignee Title
GB2113600A (en) * 1982-01-21 1983-08-10 Vagneux Traverses Beton Assembly for casting elements in prestressed reinforced concrete, particularly beams, and process for making such elements
DE3603527A1 (de) * 1985-02-13 1986-08-14 MNK-Rakennus OY, Tampere Verfahren zur herstellung von gussformen
NL1034417C1 (nl) * 2007-09-21 2009-03-24 Leenstra Machine En Staalbouw Werkwijze voor het met behulp van een mal vervaardigen van een betonelement.

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Publication number Publication date
WO2010127652A1 (fr) 2010-11-11
EP2416933A1 (fr) 2012-02-15
DE102009016804A1 (de) 2010-10-14

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