Abstract: Exothermic welding molds, weld-metal containing cartridges for such molds, and methods of use are provided. The mold, cartridges, and methods can provide interaction between the cartridge's disk member with the mold, which allows the housing member to be withdrawn from the mold while leaving the disk member and weld-metal in place. The interaction can be a rotational restraint alone, a vertical restraint alone, or combinations thereof. Alternately, the interaction can be an outward pressure on the housing member and/or disk member, a shear force on the housing member and/or disk member, or combinations thereof. The outward pressure on the housing member and/or disk member can alternately be provided without interaction between the disk member and the mold, but rather by the simple application of an internal pressure to the cartridge. The internal pressure can be applied by squeezing the walls of the cartridge and/or by depressing a pusher member.

Abstract: An interface pad for a concrete tie includes a resilient contact pad to cushion the tie from any overlying parts in a railway application, such as panels in a grade crossing or rails in a turnout. The pad may be flat or a cupped shape and may be of varying size to accommodate varying tie widths. The invention further comprises means and methods to correctly secure such an interface pad to a concrete railroad tie and minimize the possibility that the interface pad will be forcibly removed from the tie during installation of the tie.

Abstract: A method and an apparatus for the protection of a railroad rail, a direct fixation plate or another support unit, a rail to rail connection and a rail to plate connection contacting with concrete upon placing of concrete during construction. The method comprises a step of disposing a mask over a railroad track having a railroad rail, a rail connector and a rail tie to protect the railroad track while placing concrete, the mask configured to cover the rail connector and tie. The mask has a connecting portion, a central portion, an extending portion configured to mask an upper longitudinally extending portion of a railroad rail, and at least one perpendicular section disposed to cover a railroad tie, direct fixation plate or other support unit.

Abstract: An ignition source system for an exothermic reaction mold device for welding conductors. The system includes a crucible in a block with an open top so that the crucible receives an exothermic weld material. The conductors to be welded exothermically are placed in the weld cavity of the mold. A lid covers the open top wherein the lid has an opening therethrough. An electronic thermal igniter assembly has an ignition component receivable through the opening in the lid so that the exothermic weld material may be ignited by the electronic thermal igniter assembly. The igniter plug rests on top of the lid and the ignition body is retained in a recess within the igniter plug.

Abstract: A rail support block assembly includes a resilient member and a moulded block having a top, a bottom and peripheral wall. The block is adapted for fastening one or more rails on the top. The prefabricated resilient member has an outer tray and inner tray arranged within the outer tray, and includes a resilient intermediate structure between the trays. The block is moulded. The block is fixed in the inner tray to extend under the bottom of the block and along a lower region of the peripheral wall. The resilient member may form a part of the block mould, so that a mould member combined with the resilient member delimit the mould for the block. The mouldable material is introduced and adheres directly to the inner tray of the prefabricated resilient member.

Abstract: This present invention concerns a mold for the aluminothermic welding of railway rails. The compressible lining (58) used to seal the molding die in relation to leakages of the weld metal in the liquid state is limited to the parts of the contact surfaces (52) of the parts (19) of the mold on the rails to be welded, corresponding to the bottom, the sides and the top of the foot, to the sides of the web and below the head. The rigid refractory material of the parts (19) is exposed in the parts (67, 71) of the contact surfaces corresponding to the sides and the top of the head, and suitable to be removed selectively from the latter. This makes it easy to adapt the mold to rails with different degrees of wear.

Abstract: A multiple ignition source exothermic reaction mold device. The mold device includes a crucible in a block with an open top for receiving exothermic reaction powder. A lid covering the open top has an opening therethrough. A receptacle in the lid is in communication with the opening so that the receptacle receives starting powder. The starting powder and, in turn, the exothermic weld material is ignited by alternate sources, either by a spark from an ignitor device or by an electric supply sent through an ignitor element.

Abstract: The method for making a termination for a wire rope entails inserting a first end of the wire rope end into a mold, wherein the mold comprises a mold opening; placing a crucible on the mold, adding a separator to the crucible over an opening in the crucible, adding an exothermic metallic material to a crucible, igniting the exothermic metallic material to form a molten material that liquefies the separator; flowing the liquefied separator onto the end of the wire rope forming a termination capable of sustaining a higher break force than the wire rope. Other embodiments of the method entail using a liquid adhesive to form the termination.

Abstract: The invention provides a termination for a wire rope made by a process of inserting one end of a wire rope into a mold and placing a crucible with a crucible opening over the mold. The mold opening is in fluid communication with the crucible opening. Exothermic metallic material is added to the crucible. The exothermic metallic material is ignited forming a molten material. The molten material flows into the mold around the wire rope forming a termination capable of sustaining a higher break force than the wire rope. The invention also provides a termination for a wire rope made by a process with an adhesive. The termination provides a socket for connecting wire rope to various types of equipment. The socket can include one or more frustroconical wedges for securely holding the wire rope and the termination in the connector. The socket body can also include a protection sled and various ways to connect to the equipment.

Abstract: A method of constructing a rail track in which a concrete track slab is produced and rail track anchor members are inserted in the track slab by an inserter system mobile along the route of the rail track includes the following steps: using a machine for continuously pouring concrete to produce two concrete walls laterally delimiting the edges of the track slab to be poured; pouring the concrete track slab between the walls; and using the inserter system to insert anchor members in the freshly poured track slab, the tie plate inserter system being adjusted accurately by a measuring station, topographical survey points, a measuring system, and reflectors carried by the inserter system.

Abstract: A weld mold assembly which includes a crucible section for exothermically reacting weld material to form a molten metal, a weld mold having a weld chamber with an opening for receiving the molten metal and a plurality of guide holes for receiving ground rods and wires, and a cylindrical or tapered conversion plug sealably inserted into at least one of the guide holes to provide a weld assembly with a variety of different configurations.

Abstract: A lid for an exothermic reaction mold device. The device includes an internal crucible in a block with an open top. The lid includes a lower face with an elongated opening therethrough. The lid also includes an upper face with a circular opening therethrough whereby an axis of the circular opening passes through the elongated opening. A space between the upper face and the lower face of the lid is vented through a vent between the upper and the lower face.

Abstract: A self-contained crucible assembly for forming a weld between a pair of metal articles, includes a container with side walls and a fusible bottom, a refractory material lining the side walls, an exothermic weld material within the container, an ignitor partially within or close to the weld material and partially external to the container, and a cover sealing the weld material. The ignitor may be stiffened to maintain its shape, and keep it in a desired position relative to the exothermic weld material. The crucible assembly is configured to be placed on mold having a chamber therein. Upon ignition of the weld material via actuation of the ignitor, the weld material reacts exothermically to produce molten weld metal and slag. The fusible bottom of the container is melted by the liquified molten metal, and the weld material flows into a weld chamber of the mold to produce the weld.

Abstract: A weld mold assembly which includes a crucible section for exothermically reacting weld material to form a molten metal, a weld mold having a weld chamber with an opening for receiving the molten metal and a plurality of guide holes for receiving ground rods and wires, and a cylindrical or tapered conversion plug sealably inserted into at least one of the guide holes to provide a weld assembly with a variety of different configurations.

Abstract: Device for the alumino-thermic welding of two ends of a rail A device for the alumino-thermic welding of two ends of a rail, namely a casting mould (4) which is open on the upperside and which comprises a central casting chamber which is defined by the rail ends, which are spaced apart from each other by a welding groove (3), and also by the walls of the casting mould (4) and to the side of the casting chamber said casting mould comprises at least one riser (13) which is permeably connected to the casting chamber only in the region of the rail foot (11), and wherein a reaction pot (1) is provided on the base side with an outflow device which causes a steel melt to flow out of the reaction pot (1) and into the casting mould (4), is configured substantially to obviate turbulent flow conditions inside the casting mould and to homogenise the solidification of an intermediate cast structure between the ends of the rail such that the steel issuing out of the reaction pot (1) after the completion of an alumino-therm

Abstract: A single use, transportable reaction crucible for a metallothermic welding portion is provided. A separate cylindrical reaction vessel is disposed in the cylindrical casing of a non-metallic crucible shell, which has a flat base and a lid. The reaction vessel is supported on the base of the crucible shell and accommodates a welding portion. The outer diameter of the reaction vessel is less than an inner diameter of the cylindrical casing, with refractory material filling the annular intermediate space thereby formed between the reaction vessel and the cylindrical casing.

Abstract: An exothermic weld mold assembly for forming conductor to conductor welded connections. The exothermic weld mold assembly includes a crucible section having a U-shaped reaction chamber with exothermic material therein, and a mold section having a plurality of flat vertical exterior surfaces with holes drilled perpendicularly through the flat surfaces. A weld chamber is centrally located within the mold section, the weld chamber and the reaction chamber being communicably connected by a vertically extending tap hole. The holes are outfitted with guide sleeves projecting outwardly from the weld chamber. Conductors to be welded are inserted into the weld chamber through the guide sleeves.

Abstract: The invention relates to a process for the aluminothermic welding of rails, the aluminothermically produced steel being poured into a refractory mold surrounding the rail ends which are to be joined, and alloying additives being contacted with that part of the steel which runs out of the reaction crucible and forms the weld in the rail head region, wherein the alloying with the alloying additives is carried out after the completion of the aluminothermic reaction and separation of the steel from the slag via the diverting plug in the mold, and the overflow in the is closed.

Abstract: The invention relates to a process for the aluminothermic welding of rails, the aluminothermically produced steel being poured into a refractory mold surrounding the rail ends which are to be joined, and alloying additives being contacted with that part of the steel which runs out of the reaction crucible and forms the weld in the rail head region, wherein the alloying with the alloying additives is carried out after the completion of the aluminothermic reaction and separation of the steel from the slag during tapping and before the steel runs into the casting cavity formed by the mold, and the overflow in the casting mold is closed.

Abstract: A crucible for exothermic welding includes a frame and two semi-cylindrical or rectangular refractory blocks which include abutting planes through a reaction chamber and a sprue hole. One block is mounted for movement with respect to the other from an aligned mating position forming the chamber and sprue hole to an offset position which movement loosens slag formed during the welding process, and greatly facilitates cleaning. Adjustable spring ball rollers maintain the parting plane pressure.

Abstract: Pre-stressed concrete railroad ties are manufacture by the slip form process in the absence of mold members, other than the slip form itself. Tie casting occurs on a portable casting soffits between portable soffit anchored deadmen supporting the pre-stressed tie tensile members immediately overlying the casting soffit. Tie formation occurs with the slip form passing around and over the pre-stressed tension members. Track fastening hardware is vibrationally inserted through windows of the slip form to place the track fastening hardware to precise measured dimension along the route of slip form movement and to configure that portion of the tie adjacent the track fastening hardware. End of tie locations as well as tie batch identification are likewise marked during the slip form process. Upon cure, the ties are cut at their marked end location.

Abstract: An insert is described for attachment to a concrete railroad tie mold within an opening formed therein. The insert is adapted to releasably receive and position a railroad rail fastener with a head end positioned below the mold and an anchor part projecting into the mold. The insert includes an insert body including an outward peripheral edge surface shaped to fit within the formed first opening in the railroad tie mold, and an internal peripheral edge surface defining a fastener receiving opening, situated inwardly of the outward peripheral edge surface. The insert body further includes a top surface that is held in substantial coplanar relation to an adjacent mold bottom surface. A clip arrangement provided on the insert body functions to releasably secure the insert body to the mold with the top surface of the insert body being substantially coplanar with the bottom mold wall. An adapter may be provided on the mold to facilitate mounting and positioning of the insert on the mold.

Abstract: Pre-stressed concrete railroad ties are manufactured by the slip form process in the absence of mold members, other than the slip form itself. Tie casting occurs on portable casting soffits between portable soffit anchored deadmen supporting the pre-stressed tie tensile members immediately overlying the casting soffit. Tie formation occurs with the slip form passing around and over the pre-stressed tension members. Track fastening hardware is vibrationally inserted through windows of the slip form to place the track fastening hardware to precise measured dimension along the route of slip form movement and to configure that portion of the tie adjacent the track fastening hardware. End of tie locations as well as tie batch identification are likewise marked during the slip form process. Upon cure, the ties are cut at their marked end location.

Abstract: Method for intermediate cast type welding of finely pearlitized rails by pouring steels produced by the Thermit fusion process into a casting mold, which surrounds the two rail ends 13 separated from each other by an intrinsic gap L1, wherein the actual rail gap L1 is increased across the entire rail head width 14 starting on both sides of the rolling surfaces 8 of each rail end 13 in longitudinal -h and vertical -v direction by a dimension of 1/10 to 10/10 of the dimension of the intrinsic rail gap L1 to a dimension of L2.

Abstract: The disclosure relates to a mold for aluminothermic welding without preheating of two metal parts, said mold being composed of two mold parts and two sets of cores and having internally employed a mold cavity and two mold channels with cross-sections of elongated shape, extending from underneath the base portion of said mold cavity to the upper side of said mold, said mold channels and the extremities of said base portion being connected together through two connecting ducts with cross-sections of elongated shape on the vertical, the rising channels being employed from recesses of mold channels or cores and complementary channel portions determined by positions of said cores inserted into said mold channels onto positioning means, said mold in which closing gates connecting the upper side of rising channels directly to the atmosphere or to the upper side of head portion of said mold cavity, the invention further relating to a process in which a liquid bath of constant height is created in the welding cavity,

Abstract: A method for the manufacture of pretensioned prestressed concrete sleepers wherein, the tensioning wires are taken directly from one or more rolls of wire and are introduced in a longitudinal feed into a tensioning frame, and the tensioning wires (5) are initially anchored at the end thereof located at the front in feed direction. The wires are tensioned by a tensioning device arranged outside of the tensioning frame and resting against the opposite end thereof, and the wires (5) are anchored at the tensioning device; only then are the wires severed by means of a severing device. In this manner, it is possible to combine in a single station the operating stages of cutting to length, introducing and tensioning the wires, which stages in the past were distributed over several manufacturing stations, so that the labor intensive and time consuming manipulation of wires which have been previously cut to length is eliminated.

Abstract: The disclosure relates to a multi-part mold for aluminothermic welding without preheating of metal parts, said mold having internally employed a welding cavity and two rising channels with variable cross-sections along their height, the central part of welding cavity being located below with respect to the lateral parts of welding cavity, said welding cavity having an increased moment of inertia of cross-section and an increased height from the lower side of base portion of welding cavity to the neutral axis of welding cavity, said rising channels extending from a region lower than said base portion, said welding cavity and said rising channels being connected together through two connecting ducts extending from the lower side of base portion to the head portion of welding cavity, the invention further relating to a process of reaching the metal parts by the liquid steel first underneath the lower side of base, a process of creating a liquid bath of constant height in an early stage of pouring operation and t

Abstract: In forming an aluminothermic weld between adjoining rail ends, a sand mold is arranged around the rail ends disposed in spaced relation. The sand mold is formed at least in part of silica sand. The surface of the mold in contact with the rail ends and enclosing the space between the rail ends is formed of one of a combination of silica sand and zircon sand, a layer of zircon sand inwardly from a layer of silica sand, or a thin layer of a zircon mold wash on a surface formed of silica sand.

Abstract: An aluminothermic welding device. The device, which is for the butt welding of two metal members such as railroad rails, comprises a mould and a crucible the respective upper and lower faces of which are so formed with mutually complementary respective depressions and/or reliefs as to enable the crucible to be placed on the mould in a position in which the discharge aperture of the crucible and the pouring bush of the mould are coaxial and turned downwards and upwards respectively. This ensures the correct positioning of the crucible in relation to the mould. The crucible can also be constructed in a form enabling it to be used once and from a material selected for this purpose and advantageously differing from the material used for the mould.

Abstract: In casings for switch cross ties, the bottom plate 3 serves at the same time as a pattern for the position of the construction components. As a rule, a new casing is prepared for each series of cross-ties type. In small series with various positions of the construction components it is economical to use the bottom plate repeatedly. This is done by providing the bottom plate, prior to its insertion in the casing, with holes (A,B,C) for several types of finished parts, by provisionally closing the unnecessary holes by suitable means and by finding the combination of holes required for the production of a certain type of finished part through a certain searching procedure and freeing them of their provisional closing means.

Abstract: On a track for electromagnetically levitated vehicles, to adjust and secure side guide rails on a beam-like support member forming the track, after stators are adjusted and fixed to the support member, the side guide rails are held in position relative to the support member. Initially, the guide rails are positioned relative to the track and then are adjusted with respect to a datum plane determined by the lower surfaces of the stators. Next, the guide rails are adjusted horizontally transversely of the track with respect to measuring points fixed to the surface of the support member. Finally, the guide rails are attached to the support member. Apparatus for installing the guide rails includes a plurality of installation truss frames mounting assembly arms for holding the guide rails. Each assembly arm has a holding device for a guide rail and an abutment positionable against a lower surface of the stators.

Abstract: A plant to manufacture elongated concrete elements, particularly railway sleepers of prestressed reinforced concrete. In the plant according to the invention, the forms for the production of said elements are supported on carriages sliding along parallel side-by-side tracks, and the operating machines designed to perform in succession a series of operations on said forms are positioned into a limited working area, housed inside a shed, and are mounted above said tracks, substantially fixed in respect of the longitudinal axis of the tracks but movable transversely thereto. The curing area for the concrete elements is arranged externally to the working area. In the case of prestressed reinforced concrete elements, the tensioning device for the reinforcement strands are mounted directly on each of said slidable carriages supporting the forms.

Abstract: For the production of cross ties for switches, made of concrete in a prestressing fixture, a recoverable device for the emplacement of tubular components is built into the bottom of the concrete form for the tie, which comprises a pin and a nipple inserted detachably into its bottom. The nipple can be inserted into a corresponding bore of a base plate. The bore determines the position of a tube in the cross tie, has an upper and a lower stop with which it is anchored in the pin or the base plate, respectively, and can be firmly tensioned upon the base plate.

Abstract: A mould for the repairing of a damaged portion of a rail head, the mould includes a pair of mould halves which engage the longitudinal sides of the rail so as to provide a cavity above the damaged portion of the rail, molten metal is subsequently delivered to the cavity which molten metal passes across the top of the rail. The molten metal is allowed to cool and excess metal is removed to restore the shape of the rail head.

Abstract: On a track for electromagnetically levitated vehicles, side guide rails are positioned on and secured to a beam-like support member forming the track by an apparatus made up of a transportation frame extending in the long direction of the support member and by installation truss frames located on and extending transversely of the transportation frame. Side guide rail installation arms are pivotally mounted on the installation truss frames. With the arms in an outward position the guide rails can be placed on and held by the arms. By pivoting the arms inwardly the side guide rails can be located along the outer sides of the support member. By raising the installation truss frame, the guide rails can be located relative to stators mounted on the underside of the support member. In addition, the final position of the guide rails can be established by moving the installation truss frames transversely of the transportation frame and relative to a plate strip on the upper surface of the support members.

Abstract: The method of the present invention involves taking a comminuted mixture of waste plastic materials, feeding the mixture into a screw extruder capable of applying heat and pressure to the mixture; using the screw extruder to heat the mixture to a temperature of between 350.degree. and 600.degree. Fahrenheit; and forcing the molten mixture outwardly through a die opening under a pressure of from 100 lbs. per sq. inch to 600 lbs. per sq. inch into a mold in tightly sealed relationship over the die opening. The mold, after being filled, is removed from the screw extruder, and the mixture is permitted to cool and harden in the mold. The hardened mixture is then removed from the mold.

Abstract: Prestressed concrete railroad ties are formed in molds which are supported by existing track near the area where they are to be installed. Each mold will form a number of ties. Reinforcing strands are located within a plurality of longitudinally spaced molds. Concrete is then poured into the molds and the ties are formed bottoms up in the molds. A group of ties are simultaneously removed from a given mold by a special extractor which first simultaneously clamps the reinforcing strands extending outwardly from a given mold, and then lifts the strands as a group from the mold by a suitable crane. Preferably the center of gravity of ties is spaced from a pivot point which will cause 180.degree. rotation locating the ties in upright position to be loaded on a railway car or other vehicle to take them to the site where they are to be installed.

Abstract: Prestressed concrete railroad ties are formed in molds which are supported by existing track near the area where they are to be installed. Each mold will form a number of ties. Reinforcing strands are located within a plurality of longitudinally spaced molds. Concrete is then poured into the molds and the ties are formed bottoms up in the molds. A group of ties are simultaneously removed from a given mold by a special extractor which first simultaneously clamps the reinforcing strands extending outwardly from a given mold, and then lifts the strands as a group from the mold by a suitable crane. Preferably the center of gravity of ties is spaced from a pivot point which will cause 180.degree. rotation locating the ties in upright position to be loaded on a railway car or other vehicle to take them to the site where they are to be installed.

Abstract: Method includes placement of rail-clamps in a concrete mould, while securing elements thereof on the outside of the mould. Concrete reinforcement members are placed on the clamps. A connecting rod is introduced through a mould opening and the mould thereafter is filled with concrete and treated by vibration.

Abstract: An apparatus and method for making a plurality of formed concrete products. The apparatus comprises a platform having a mold tray situated thereon, wherein the platform has a built in vibrator and the mold tray is attached to a hydraulic lift system. The hydraulic lift system lifts and inverts the mold tray and cured concrete products for easy removal.

Abstract: In a bank of sleeper moulds wherein the moulds lie side by side and contain shoulder receiving apertures which locate shoulders during pouring, the improvements including a rocker shaft journalled for rotation with respect to the moulds and having retaining members thereon which retain the shoulders and urge them into engagement with locating means.

Abstract: An apparatus for making a plurality of formed concrete products. The apparatus comprises a platform having a series of mold cavities, wherein the platform is attached to a vibrator and a hydraulic lift system. The hydraulic lift system lifts and inverts the platform, molds, and cured concrete products for easy removal. The apparatus also comprises a reinforcing bar support system which suspends the reinforcing bars from tapered pins extending into the wet cement, thus eliminating the need for placing reinforcing bar supports on the bottom of the mold cavity.

Abstract: The bottom of a concrete sleeper mold is formed with an opening, through which a rail fastening shoulder can be inserted. A pair of rotatable pieces are disposed beneath the mold on the opposite sides of the opening such that they face each other. These rotatable pieces are rotatable upwardly and downwardly. Their ends facing each other are formed with recesses, and they are spring biased by spring members in the circumferential direction of their support pins.

Abstract: A method and apparatus for laying a railroad track includes laying, in tandem, a series of pre-cast concrete slabs on a prepared track bed, the slabs being isolated from the bed, and from each other, by rubber isolation pads, and the slabs having cavities formed on the top faces. The rails are held above the slabs, in their proper location, by removable gauge beams having adjustment means to exactly locate the rails. Before filling the cavities with concrete the shoulder-pins, used to secure the rails, are located with their pin portions in the cavities by being removably secured to templates. The templates are held suspended above the slabs by being removably attached to a rail. The rails are used as guides after setting their exact gauge (separation), elevation and cant (angle of inclination) on the gauge beams, to determine the positions of the templates and shoulder-pins.

Abstract: This invention relates to an improvement in the process of mold welding two metal parts together having respective base sections, which includes enclosing the end sections of said metal parts in aligned end-to-end relation in a mold having an entrance gate, flowing molten metal through said entrance gate into said mold, and out of said mold at rates so related as to cause some of the metal admitted into the mold to be discharged from said mold while the rest of the molten metal accumulates as a metal bath to cause the molten metal during the early stage of its admission into the mold to preheat the metal parts, and conducting some of the said molten metal during said early stage from the entrance gate through a recess and directly onto said base sections in direct impingement with said base sections to promote better heat transfer between said molten metal and said metal parts, the improvement comprising discharging molten metal through at least two separate exit gates into separate discharge chambers located

Abstract: A metal element for securing rails to cast concrete railroad ties by use of Pandrol clips includes a transverse plate extending between lugs of the metal element, and which prevents concrete admixture from filling a socket provided within the metal elements for the reception of a leg of the Pandrol clip.

Abstract: Workpieces of prestressed concrete, specifically railroad ties, are molded in a form having its bottom covered with several transversely separated templates whose outline corresponds to that of respective ties to be produced; the form is longitudinally traversed by reinforcing rods or cables attached to its ends under tension. Each template is provided with several countersunk nuts to be engaged by retaining bolts which pass through upright screw anchors with downwardly opening throats loosely occupied by internally threaded centering sleeves that come to rest on the associated template. With the form compartmented by removable spacers separating the templates, concrete is poured into each compartment and allowed to harden about the screw anchors rising therein; the retaining bolts are then withdrawn along with the spacers to provide the resulting concrete blocks with a certain mobility whereupon the tensioned reinforcing armatures are released to prestress these blocks and are subsequently cut between them.

Abstract: A method of manufacturing railway switch-point concrete sleeper blocks of varying lengths and having different number of attachment means located in mutually different positions for the attachment of rails. A plurality of steel matrix plates 102 whose respective lengths correspond to the desired lengths of the various sleeper blocks and which exhibit detachably mounted dowels 109 are placed end to end in an elongate mould bed with the dowels facing upwardly, whereafter reinforcing lines rods 5 are tensioned and concrete is poured into the mould bed and permitted to harden. The thus formed coherent concrete body is then removed from the mould and the matrix plates removed with the dowels remaining cast in the concrete block. The concrete body is then cut into sleeper blocks of desired length. The dowels are accurately mounted in predetermined positions in frame members affixed to the matrix plates.

Abstract: A method of manufacturing railway switchpoint concrete sleeper blocks of varying lengths and having different number of attachment means located in mutually different positions for the attachment of rails. A plurality of steel matrix plates 102 whose respective lengths correspond to the desired lengths of the various sleeper blocks and which exhibit detachably mounted dowels 109 are placed end to end in an elongate mould bed with the dowels facing upwardly, whereafter reinforcing rods 5 are tensioned and concrete is poured into the mould bed and permitted to harden. The thus formed coherent concrete body is then removed from the mould and the matrix plates removed, with the dowels remaining cast in the concrete block. The concrete body is then cut into sleeper blocks of desired length. The dowels are accurately mounted in predetermined positions in frame members 111 affixed to the matrix plates.

Abstract: Some self-supporting screens for closing the mold head, some self-supporting separating screens, group positioning devices and group tensioning devices, are used. A series of novel installations for the shock heat treatment, stripping and removal of the products enables by combination with the foregoing means, improvement with respect to known processes, on the one hand of the manufacturing process and on the other hand enables stripping to be brought forward.