EP0733738A1 - Herstellungsverfahren für eine Eisenbahnschienenunterstützung und nach dem Verfahren hergstellte Unterstützung - Google Patents

Herstellungsverfahren für eine Eisenbahnschienenunterstützung und nach dem Verfahren hergstellte Unterstützung Download PDF

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Publication number
EP0733738A1
EP0733738A1 EP96400568A EP96400568A EP0733738A1 EP 0733738 A1 EP0733738 A1 EP 0733738A1 EP 96400568 A EP96400568 A EP 96400568A EP 96400568 A EP96400568 A EP 96400568A EP 0733738 A1 EP0733738 A1 EP 0733738A1
Authority
EP
European Patent Office
Prior art keywords
gravel
concrete
face
block
sole
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
EP96400568A
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English (en)
French (fr)
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EP0733738B1 (de
Inventor
Denis Vallet
Charles Petit
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.)
Traverses En Beton Arme Systeme Vagneux SA
Original Assignee
Traverses En Beton Arme Systeme Vagneux SA
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 Traverses En Beton Arme Systeme Vagneux SA filed Critical Traverses En Beton Arme Systeme Vagneux SA
Publication of EP0733738A1 publication Critical patent/EP0733738A1/de
Application granted granted Critical
Publication of EP0733738B1 publication Critical patent/EP0733738B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
    • E01B1/001—Track with ballast
    • 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
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0046—Machines or methods for applying the material to surfaces to form a permanent layer thereon to plastics
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
    • E01B3/46—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from different materials
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2204/00—Characteristics of the track and its foundations
    • E01B2204/01—Elastic layers other than rail-pads, e.g. sleeper-shoes, bituconcrete

Definitions

  • EP-A-0 465 390 proposes to fix such a sole to or to each concrete block of a cross-member or any other rail support, by proposing different modes of joining, namely a projection or a casting of the visco-elastic material on concrete, an integration of prefabricated plates of visco-elastic material on concrete, during the manufacture of the rail support, such as a cross member, by molding at least one concrete block, or even by bonding of such prefabricated plates to concrete, using any suitable adhesive.
  • the object of the present invention is to improve the fixing of a viscoelastic sole prefabricated to the concrete of a rail support block such as a cross member, so as to improve the homogeneity and the efficiency of the fixing of the sole to the concrete while retaining the advantages of speed of implementation and homogeneity of thickness of the sole, resulting from the direct integration of the latter into the molding of the concrete and the prefabrication of the latter.
  • the present invention also provides a railway rail support, such as a sleeper, comprising at least one concrete block having in particular an upper face intended to receive at least one rail and a lower face intended to ensure the support of the block on a substrate, such a ballast, and a sole made of visco-elastic material integrally covering this lower face and intended to serve as a support intermediary between the block and the substrate, characterized in that concrete chippings are fixed to one face of the sole facing the underside of the block, evenly distributed.
  • a railway rail support such as a sleeper
  • the area of the footprint corresponding to the underside of the concrete block to be produced can be defined by a wall defining the footprint, in which case the prefabricated plate is placed against this wall, during step b), before pouring the concrete into the cavity.
  • step b) is implemented by first filling the concrete footprint to constitute the underside of the block by the free surface of the concrete and then applying thereto, before setting the concrete, the gravelled face of the prefabricated plate under operating conditions capable of causing the integration of gravel from the gravel face to the concrete.
  • the free surface of the concrete is preferably smoothed before applying the gravelled face of the prefabricated plate, which ensures effective penetration of all the gravel in the fresh concrete.
  • This smoothing is advantageously carried out by tamping, that is to say by application of a pressure and, preferably, of a vibration, which have the effect of causing a rise in the laitance of the concrete.
  • the gravelled face of the prefabricated plate is then applied to the free surface of the concrete under operating conditions, in particular of pressure and, preferably, of vibration, such that it results in flooding. gravel of the face graveled in the laitance and filling, by the latter, of the intermediate space between the free surface of the concrete and the prefabricated plate without any other material for this purpose.
  • a railway rail support according to the invention is characterized in that the sole has dimensions, in plan, smaller than those of the underside of the block.
  • the mechanical resistance of the sole is improved by integrating, during step a), a reinforcement with the visco-elastic material of the prefabricated plate, the rail rail support according to the invention then being characterized by that the visco-elastic material of the sole includes such a frame.
  • this reinforcement defines meshes of dimensions smaller than the particle size of the gravel of the prefabricated plate, that is to say of gravel fixed to the sole, which facilitates the implementation of step a) according to a method consisting in fixing the gravel to the plate by partially integrating them into the visco-elastic material, which means that the support according to the invention is then characterized in that the gravel fixed to the sole protrude from the underside of the block and are partially integrated into the visco-elastic material of the sole.
  • the gravel of the prefabricated plate form outside of it a projection of a height of the order of 50% to 95% of their height, measured perpendicular to the gravel face, so well that the gravel attached to the sole are integrated into the visco-elastic material thereof over a height of the order of 5% to 50% of their height, measured perpendicular to the underside of the block.
  • the plate is advantageously prefabricated, during step a), by melting, forming and solidifying the visco-elastic material, chosen to be hot-melt, and the gravel is partially integrated into the visco-material. elastic by sowing them on it between forming and solidification.
  • the sole includes a reinforcement, and if this reinforcement defines meshes of dimensions smaller than the grain size of the gravel of the prefabricated plate, this reinforcement prevents the gravel thus sown between the forming and the solidification of the visco-elastic material passing through this material until reaching the face of the prefabricated plate intended to constitute the face of support of the sole on the ballast, and thus preserves the homogeneity of this bearing face on the ballast.
  • the gravel of the prefabricated plate that is to say the gravel fixed to the sole, have the same nature and the same particle size as those of concrete, and leave spaces between them whose dimensions correspond to the maximum to their particle size, which on the one hand facilitates the insertion of the gravel of the prefabricated plate between those of the concrete intended to constitute the block during the pouring of this concrete and on the other hand ensures a homogeneity of the distribution of the gravel in concrete up to the immediate vicinity of the base.
  • the gravel of the prefabricated plate that is to say the gravel fixed to the sole, cover from 80% to 95% of the gravel face of the prefabricated plate, that is to say say more of the underside of the block.
  • a one-piece cross member 1 made of prestressed reinforced concrete, has the general shape of a block 2 of concrete, elongated in a longitudinal direction 3 perpendicular to the rail 4 to be supported .
  • the block 2 is delimited by a flat bottom face 6, longitudinal, parallel to the rolling plane 7 of the rails, this face lower 6 being embedded in the ballast 5 and resting thereon, flat, by means of a sole 8 of a visco-elastic material chosen for example in accordance with the teachings of EP-A-0 465 390, and an upper face 9 which is essentially flat and parallel to the lower face 6 in the example illustrated but could have other conformations, and receives the two rails 4 directly or, as illustrated, by means of saddles 10, with elastic fixing of the rails 4 by means 11 which are not detailed and well known to a person skilled in the art.
  • the block 2 is also delimited by two flat longitudinal faces 12 connecting the lower face 6 to the lower face 9 by converging mutually from the first to the second, so as to communicate to block 2 a cross section in the form of an isosceles trapezoid, and by two transverse end faces 13 also plane, also connecting the lower face 6 to the upper face 9 and connecting in in addition to each other the two longitudinal faces 12, these two faces 13 being approximately transverse and converging mutually from the lower face 6 towards the lower face 9 so that when it is seen in section through a longitudinal plane perpendicular to these faces 6 and 9 , the crosspiece also has a section essentially in the form of an isosceles trapezoid.
  • the sole 8 has, in contact, flat with the lower face 6 of the block 2, a planar upper face 14 integral with this lower face 6 while it presents towards the bottom, that is to say in contact with the ballast 5, a lower face 15 also planar, parallel to the upper face 14 and sufficiently close to the latter so that the sole 8, considered in isolation, has the form of a plate with a thickness of the order of 3 to 10 mm, preferably of the order of 4 mm, these figures being given only by way of nonlimiting example.
  • the two faces 14 and 15 are connected to each other by an edge 16 which is perpendicular to them and gives them a rectangular shape which can be identical to that of the lower face 6 of the block 2, that is to say in particular have the same dimensions. that this lower face 6 so that the sole 8 completely covers the latter, in a manner known per se, or be approximately identical to that of the lower face 6, and more precisely have dimensions a few millimeters smaller than those of this lower face 6 so that the sole 8 covers practically the whole of it, leaving however remain a free peripheral zone 17 whose presence facilitates the manufacture of the assembly integral with the block 2 and the sole 8 in accordance with the present invention, as will appear below, and whose direct contact with the ballast 5 has little drawback insofar as this zone 17 is limited to the immediate proximity of the connection of the lower face 6 with the longitudinal faces 12 and the transverse end faces 13.
  • the plate constituting the sole 8 is prefabricated before being integrated into the concrete constituting the block 2, in the manufacture thereof, but a specific method of prefabrication, constituting an implementation mode
  • the preferred embodiment of the present invention will now be described with reference to FIG. 3, with regard to the prefabrication process, and FIG. 4 with regard to the prefabricated plate obtained, intended to constitute the sole 8.
  • FIG. 3 shows that a plate 18 is initially produced having a lower face 19 and an upper face 20 that are plane, mutually parallel, separated by a thickness e corresponding to the thickness e of the sole 8 measured between its upper face 14 and its underside 15, with plan dimensions which may be those of the sole 8 to be produced, or even be much greater to correspond to the soles 8 of several crosspieces 1, in which case the plate 18 is cut at a time any preceding its integration, as a sole 8, to the concrete constituting the block 2 of each cross member, respectively.
  • the plate 18 thus produced has dimensions in plan corresponding to several soles 8, it is then cut into a certain number of elementary plates each of which has the dimensions required to constitute a respective sole 8, as will readily be understood by a person skilled in the art.
  • the same reference numeral 18 will be kept thereafter to designate a plate produced directly to the dimensions of a determined sole 8 or a plate obtained by cutting a plate 18 corresponding to several soles 8.
  • a plate 18 thus defined, having dimensions corresponding to those of a sole 8, is integrated into the concrete constituting the block 2 of a cross member 1 to be produced, to constitute the sole 8 thereof, under operating conditions which will will now be described, with reference to FIGS. 6 to 10.
  • a mold 29 is used for molding the reinforced concrete constituting the block 2 which is detachably hung on a vibrating table 30, in a position of use which will serve as a reference to the brief description, below, of this mold 29 well known to a person skilled in the art.
  • flank 33 and end 34 faces, connecting in pairs, thus connect the bottom 32 to a flat, horizontal upper face 35 of the mold 29, at which these flank 33 and end 34 faces delimit a filling opening 36 fully open, rectangular like the underside 6 of the block 2 to be produced and having dimensions slightly greater than those of this face 6.
  • the mold 29 has means, not detailed, for temporarily stretching between the end faces 34 of the prestressing frames 37 of the block 2 in compression, and may have various arrangements, in particular at the level of the bottom 32, to optionally receive members to be incorporated into the concrete of block 2 with a view to fixing the saddles 10, in the form of inserted dowels or studs, in a manner not illustrated but well known to a person skilled in the art.
  • the reinforcements 37 having been put in tension inside the cavity 31 and the other reinforcements of the block 2 to be produced having also been placed in this cavity 31, as well as any member to be integrated into the concrete in particular for fixing the saddles 10, the concrete 38 intended to constitute the block 2 is poured into the cavity 31, by vibrating the vibrating table 30 under the usual operating conditions, as illustrated in FIG. 6.
  • the cavity 31 is thus substantially filled with concrete 38 which, at the end of this filling, presents upwards a free surface 39 approximately flat and approximately level with the upper face 35 of the mold 29, in the filling opening 36 , as can be seen in FIG. 7 which illustrates a next phase in the production of the block 2.
  • This phase consists in tamping with the free surface 39 in particular to make it smooth and flat, that is to say giving it the conformation of the lower face 6 of block 2 which it is intended to constitute.
  • the concrete 38, inside the cavity 31 then has the shape of the block 2 to be produced.
  • This damage also has the effect of causing, if possible taking into account the composition of the concrete 38, a rise in milt at the level of the surface 39, this possible rise in milt being used according to one of the preferred embodiments of the present invention for ensuring the subsequent anchoring of the plate 18 by its gravelled face 20.
  • the tamping is accompanied by vibrations communicated by the vibrating table 30 and is carried out by means of a jack 40 having the general shape of a rigid plate having a flat lower face 41 of tamping, horizontal and having a shape in rectangular plan, corresponding to that of the face 6 to be produced, so that it can be moved towards the inside of the imprint 31 by applying pressure to the face 39 until it occupies relative to the bottom 32 of the imprint 31 a position identical to that of the lower face 6 of the block 2 with respect to the upper face 9 thereof.
  • the plate 40 is stiffened for example by a beam 42 which doubles it upwards, and which ensures the connection of this plate 40 to means, simply shown diagrammatically by a double vertical arrow 43, of lifting relative to the mold 29, to release the filling opening 36, and the descent towards this mold 29, that is to say towards the inside of the cavity 31, in order to compact the free surface 39 of the concrete 38 with the application of pressure to this one.
  • a next step, illustrated in FIG. 8, is characteristic of the implementation of the present invention and consists in depositing on the free, grated surface 39 of the concrete 38 the plate 18, the gravel face 20 of which is turned towards the bottom so that this gravelled face 20 essentially covers the free surface 39 of the concrete 38, in a position substantially identical to that which the sole 8 must occupy with respect to the underside 6 of the block 2. Naturally, this deposition takes place while the tamping plate 40 is lifted.
  • the step illustrated in FIG. 7 can be entered and the step illustrated in FIG. 8 effecting on the free surface 39 of the concrete an addition of an additional material constituting the latter, namely in particular water, pure cement or cement added with sand, preferably without adding gravel.
  • an additional material constituting the latter, namely in particular water, pure cement or cement added with sand, preferably without adding gravel.
  • the material thus provided is in the fluid state, in the same way as the concrete 38 filling the imprint 31.
  • the tamping plate 40 is lowered towards the imprint 31 so that the face 41 of this tamping plate 40 rests flat on the face 19, then turned upwards, of the plate 18 itself bearing downwards, by its gravelled face 20, on the free surface 39 of the concrete 38.
  • a downward pressure is thus applied to the gravelled plate 18, by means of the tamping plate 40 , by vibrating the mold 29 by means of the vibrating table 30, under conditions identical to those which gave rise to a possible rise in milt during the tamping described with reference to FIG.
  • the gravel 27 has a particle size identical to that of the concrete gravel 38, on the one hand, and delimit between them free spaces 28 having dimensions corresponding as much as possible to this particle size
  • gravel 44 of the concrete 38 is inserted in the free spaces 28 between the gravel 27 during this phase of penetration of the latter into the concrete 38, as shown in the figure 5 illustrating the finished cross-member 1, in the position of use, so that the gravel 27 is embedded in concrete 38 under the same conditions as the gravel 44, and the identity of nature between the gravel 27 and the gravel 44 ensures homogeneity of concrete 38 until contact with the gravel face 20 of the plate 18.
  • the concrete 38 may also contain gravel with a grain size greater than that of gravel 44, in a manner known per se.
  • the continuity between the gravel 44 and 27 is ensured by the sole laitance raised during tamping illustrated in FIG. 7, or by the filler material deposited on the free surface 39 between the steps illustrated in FIGS. 7 and 8 in the event that the quantity of laitance thus available is insufficient ; a possible excess of laitance or filler material can be evacuated upward around the plate 18, taking account of the aforementioned dimensioning of the latter.
  • the block 40 is lifted and the vibration stopped, and the mold 29 is detached from the vibrating table 30 to convey it to an intermediate storage area or, as illustrated in the figure 10, towards an oven to authorize or cause the setting of the concrete 38.
  • the molds 29 are preferably turned over, that is to say rest by their face 35 on a horizontal support , plane 45, so that the concrete 38 rests on this support 45 by means of the gravelled plate 18 and contributes, by its own weight, to preserve the integration of the gravel 27 thereof into the concrete 38; however, it would not be departing from the scope of the present invention to leave the face 35 of the molds facing upwards during setting of the concrete 38.
  • the gravel 27, embedded both in the visco-elastic material now constituting the sole 8 and in the concrete 38 now constituting the block 2, provide a regularly distributed connection between the sole 8 and the block 2, in a particularly effective manner, by covering the same proportion of the lower face 6 of the block 2 as of the upper face 14 of the sole 8, namely from the '' from 80% to 95% in the preferred implementation example indicated above.
  • the molding imprint 31 to be shaped so as to carry out the molding of the crosspiece not in an inverted position thereof but in another position, in which case it could be necessary to arrange the plate 18 in this footprint 31 before pouring the concrete 38 therein, the gravelled plate 18 being naturally placed in the zone of the footprint 31 intended to produce the lower face 6 of the block 2 of concrete and having its gravelled face 20 towards the inside of imprint 31.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Road Paving Structures (AREA)
  • Forging (AREA)
  • Jigs For Machine Tools (AREA)
  • Railway Tracks (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
EP96400568A 1995-03-20 1996-03-19 Herstellungsverfahren für eine Eisenbahnschienenunterstützung und nach dem Verfahren hergstellte Unterstützung Expired - Lifetime EP0733738B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9503199A FR2732046B1 (fr) 1995-03-20 1995-03-20 Procede de fabrication d'un support de rail de chemin de fer, et support susceptible d'etre obtenu par la mise en oeuvre de ce procede.
FR9503199 1995-03-20

Publications (2)

Publication Number Publication Date
EP0733738A1 true EP0733738A1 (de) 1996-09-25
EP0733738B1 EP0733738B1 (de) 2000-06-28

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EP96400568A Expired - Lifetime EP0733738B1 (de) 1995-03-20 1996-03-19 Herstellungsverfahren für eine Eisenbahnschienenunterstützung und nach dem Verfahren hergstellte Unterstützung

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EP (1) EP0733738B1 (de)
AT (1) ATE194180T1 (de)
DE (1) DE69608985T2 (de)
ES (1) ES2147349T3 (de)
FR (1) FR2732046B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0833008A1 (de) * 1996-09-30 1998-04-01 Societe Pour L'etancheite, Les Revetements Et Les Protections Unterlage unter einer Schwelle als Schutz zum Bettungsmaterial
WO1999028555A3 (de) * 1997-11-28 1999-07-15 Pfleiderer Infrastrukturt Gmbh Querschwelle für eisenbahngleise
US7033988B2 (en) 2002-01-23 2006-04-25 The Procter & Gamble Company Detergent tablets comprising solubility aids
FR2935399A1 (fr) * 2008-09-02 2010-03-05 Sateba Systeme Vagneux Semelle viscoelastique, ensemble comportant un bloc et une semelle precitee, et procedes de fabrication correspondants.
FR2983876A1 (fr) * 2011-12-12 2013-06-14 Fimor Semelle sous traverse et traverse a laquelle est solidarisee une telle semelle.
WO2022051208A1 (en) * 2020-09-01 2022-03-10 Dow Global Technologies Llc Molding devices and methods for making elastomeric pads for use as rail ties

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2166732B2 (es) * 2000-09-12 2003-07-01 Plasticos Mondragon Sa Suela bajo traviesa de hormigon para vias de alta velocidad.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2659161A1 (de) * 1976-12-28 1978-07-06 Zueblin Ag Schotterloser eisenbahnoberbau
EP0440597A1 (de) * 1990-01-30 1991-08-07 Allgemeine Baugesellschaft - A. Porr Aktiengesellschaft Gleisober- und Gleisunterbau für schienengebundene Fahrzeuge
EP0465390A1 (de) * 1990-07-06 1992-01-08 Societe Pour L'etancheite, Les Revetements Et Les Protections Gleis
EP0569867A1 (de) * 1992-05-09 1993-11-18 Phoenix Aktiengesellschaft Schienenanordnung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2659161A1 (de) * 1976-12-28 1978-07-06 Zueblin Ag Schotterloser eisenbahnoberbau
EP0440597A1 (de) * 1990-01-30 1991-08-07 Allgemeine Baugesellschaft - A. Porr Aktiengesellschaft Gleisober- und Gleisunterbau für schienengebundene Fahrzeuge
EP0465390A1 (de) * 1990-07-06 1992-01-08 Societe Pour L'etancheite, Les Revetements Et Les Protections Gleis
EP0569867A1 (de) * 1992-05-09 1993-11-18 Phoenix Aktiengesellschaft Schienenanordnung

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0833008A1 (de) * 1996-09-30 1998-04-01 Societe Pour L'etancheite, Les Revetements Et Les Protections Unterlage unter einer Schwelle als Schutz zum Bettungsmaterial
FR2753998A1 (fr) * 1996-09-30 1998-04-03 Etancheite Les Revetements Et Semelle sous traverse pour protection du ballast
WO1999028555A3 (de) * 1997-11-28 1999-07-15 Pfleiderer Infrastrukturt Gmbh Querschwelle für eisenbahngleise
US7033988B2 (en) 2002-01-23 2006-04-25 The Procter & Gamble Company Detergent tablets comprising solubility aids
FR2935399A1 (fr) * 2008-09-02 2010-03-05 Sateba Systeme Vagneux Semelle viscoelastique, ensemble comportant un bloc et une semelle precitee, et procedes de fabrication correspondants.
FR2983876A1 (fr) * 2011-12-12 2013-06-14 Fimor Semelle sous traverse et traverse a laquelle est solidarisee une telle semelle.
FR2983875A1 (fr) * 2011-12-12 2013-06-14 Fimor Semelle sous traverse solidarisable a une traverse en beton ou analogue et traverse en beton ou analogue a laquelle est solidarisee une telle semelle sous traverse.
WO2013088073A1 (fr) * 2011-12-12 2013-06-20 Fimor Semelle sous traverse et traverse a laquelle est solidarisee une telle semelle
WO2022051208A1 (en) * 2020-09-01 2022-03-10 Dow Global Technologies Llc Molding devices and methods for making elastomeric pads for use as rail ties

Also Published As

Publication number Publication date
DE69608985D1 (de) 2000-08-03
FR2732046B1 (fr) 1997-06-20
DE69608985T2 (de) 2000-11-30
ES2147349T3 (es) 2000-09-01
ATE194180T1 (de) 2000-07-15
FR2732046A1 (fr) 1996-09-27
EP0733738B1 (de) 2000-06-28

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