US2397728A - Mold for the production of prestressed reinforced concrete sleepers - Google Patents

Mold for the production of prestressed reinforced concrete sleepers Download PDF

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Publication number
US2397728A
US2397728A US527798A US52779844A US2397728A US 2397728 A US2397728 A US 2397728A US 527798 A US527798 A US 527798A US 52779844 A US52779844 A US 52779844A US 2397728 A US2397728 A US 2397728A
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US
United States
Prior art keywords
mold
wires
slots
plates
plate
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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.)
Expired - Lifetime
Application number
US527798A
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English (en)
Inventor
Dowsett Harry Lyttelton
Barber Ronald Samuel Vernon
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.)
DOWSETT ENGINEERING CONSTRUCTI
DOWSETT ENGINEERING CONSTRUCTION Ltd
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DOWSETT ENGINEERING CONSTRUCTI
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Application filed by DOWSETT ENGINEERING CONSTRUCTI filed Critical DOWSETT ENGINEERING CONSTRUCTI
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Publication of US2397728A publication Critical patent/US2397728A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/022—Means for inserting reinforcing members into the mould or for supporting them in the mould
    • B28B23/024—Supporting means
    • B28B23/026—Mould partitionning elements acting as supporting means in moulds, e.g. for elongated articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed

Definitions

  • This invention consists of improvements in the production of' pre-stressed reinforced concrete sleepers, and in this specification the term sleepers includes similar beams.
  • one of the end plates (conveniently the one having vertical slots) is fixed to the mold while the other end plate is detachable.
  • one end plate is secured to the mold it will be understod that the mold is brought into proper relationship with the reinforcing wires, the wires of each vertical set being introduced into the appropriate slots.
  • detachable end plates itwil'l be understood that they can either be bolted on to the mold or they can be slid into guides at the ends of the molds.
  • each of the two plates has a series of parallel slots extending from one edge of the plate (say the top edge) for an appropriate distance across the plate. Then each of these slots has a series of lateral extensions in the form of very short branches; or spurs adapted to accommodate the reinforcing wires in their final positions.
  • the other plate is similarly provided with a setof parallel slotsextending from its edge but in this case the lateral branches or spurs extend in the opposite direction from those in the first plate.
  • said plates are not themselves in register with one another but are slightly staggered (i. e. those edges of the plates which are parallel with the main slots are slightly displaced from' one. another).
  • the arrangement is such that when the two plates are slid to bring them into register, the main slots are no longer in register but the two sets of short lateral branches now engage the reinforcing wires and may be caused to grip these wires securely.
  • each sleeper is to have ten reinforcing wires arranged in two verti cal rows of three wires and two vertical rows of two wires
  • each plate may have four long slots extending from the upper edge.
  • Thev two outer and longer slots have three short lateral branches on their right-hand side at the same vertical height as the reinforcing wires which they are to receive. The two shorter slots have each two plates are then securely .ibolted together.
  • the other plate is similarly constructed but in this case the main slots are laterally displaced from those of a the first plate by rather more than. the width of g a main-slot and in this case the'branches are on the left-hand side of the main slots.
  • del 2 H 2,397,728 little branches (likewise on their right-hand side) scribed above certain bolt holes for the securingv bolts are in the form of oblong. horizontal slots.
  • the reinforcing wires are set up with light tension.
  • the two contactingend plates with their main slots in coincidence are passed upwards so slid in relation to one another so that-all the wires are gripped on both sides by thelatcral: branches. At first the grip may be slight.
  • Each end plate may therefore be provided at its lower end with a horizontal flange upturned at its edges-so as to form a tray or trough to catch any grout which may leak from the end of the mold.
  • the trough at the bottom of the inner end plate may face inwardly and the trough of the outer end plate may face outwardly.
  • Figures 1 and .2 areend elevations of end plates embodying a preferred form of this invention
  • Figure .3 is an end elevation showing the two end plates of Figures 1 and 2 in their final position gripping and locating the wires, and
  • Figure 41s are .a'perspective view showing the reinforcing wires and a mold having attached thereto end plates with troughs at their lower ends.
  • the end late 22 shown in Figure 1 has four parallel slots 23, 24, 2.5,:26 extending from the top edge of-the plate vertically downwards for an appropriate distance across the plate. Then each of these slots 23, 24, 25, 28 has a series of lateral extensions in the formuof very short branchesor spurs I23, I24, I and 126 adapted 'to accommodate the reinforcing wires in their final positions.
  • the other plate 21 shown in Figure 2 is similarly provided with four parallel slots 28, 2'9, '30-and 3l extending from the top edge vertically downwards for an appropriate distance across the plate but in this case the lateral branches or spurs I28, I29, I30,
  • the two plates 22 and 21 are placed with their fiat faces in contact and with their main slots coinciding, the vertical edges of the plates are slightly displaced from one another but the two plates: can'be readily passed over the reinforcing wires.
  • the two plates are relatively moved to bring them into register the two sets ofjshort lateral branches engage the reinforcing wires and, grip them securely.
  • Figure 3 shows the two end plates in their final position where the reinforcing wires are firmly gripped and located.
  • the body of the mold 33 is a hollow open-ended trough. It has horizontal flanges 34' along the upper lateral edges and these flanges carry the transverse bars 35 which support the upright pins 36 which form in the concrete sleeper the holes for the holdingdown bolts.
  • the side walls have flanges-3:1 having bolt holes to enable the end in Figure 4 are placed back to back, they can be similar in form when originally made (subject to the positioning of the bolt holes).
  • a mold for the production of pro-stressed reinforced concrete sleepers comprising an openended trough-shaped body portion, adapted to accommodate a number of parallel reinforcing wires stretched within and extending longitudinally of said mold and at each end of the mold two end plates each havin a series of parallel slots extending from one edge of the plate, each of these slots in one plate having a series of lateral extensions in the form ofvery short branches extending in one direction while each of the slots in the second plate has very short lateral branches extending in the opposite direction from those in the first plate, means for applying the plates to the endof the mold to accommodate the wires in the slots and means to impart relative lateral movement to the end plates to bring the main slots out of register but to cause the wires to be gripped in the said'lateral extensions.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
US527798A 1943-04-08 1944-03-23 Mold for the production of prestressed reinforced concrete sleepers Expired - Lifetime US2397728A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5663/43A GB572387A (en) 1943-04-08 1943-04-08 Improvements in the production of pre-stressed reinforced concrete sleepers and similar beams

Publications (1)

Publication Number Publication Date
US2397728A true US2397728A (en) 1946-04-02

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US527798A Expired - Lifetime US2397728A (en) 1943-04-08 1944-03-23 Mold for the production of prestressed reinforced concrete sleepers

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US (1) US2397728A (US08080257-20111220-C00005.png)
BE (1) BE459586A (US08080257-20111220-C00005.png)
GB (1) GB572387A (US08080257-20111220-C00005.png)
NL (1) NL62650C (US08080257-20111220-C00005.png)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556928A (en) * 1948-01-27 1951-06-12 Vickers Electrical Co Ltd Mold for reinforced concrete structures
US2689999A (en) * 1950-05-26 1954-09-28 Concrete Products Co Apparatus for manufacturing prestressed concrete structural units
US2695754A (en) * 1951-07-03 1954-11-30 Dyckerhoff & Widmann Ag Railway track sleeper
US2721368A (en) * 1952-03-20 1955-10-25 Ellis E Landrum Concrete picket fence form
US2787043A (en) * 1954-07-16 1957-04-02 Johnnie E Daniell Block mold
US2902743A (en) * 1953-07-27 1959-09-08 Bertell W King Concrete bulkhead, jetty or pile form
US4253817A (en) * 1978-07-27 1981-03-03 Martin Concrete Engineering Company Concrete railroad tie casting and handling system
EP0180937A2 (de) * 1984-11-03 1986-05-14 Wayss & Freytag Aktiengesellschaft Schalung für Serienfertigteile aus Stahlbeton, vornehmlich für vorgespannte Weichenschwellen
US4653718A (en) * 1984-12-19 1987-03-31 Radva Corporation Molding structure for supporting preform inserts
US4830330A (en) * 1986-06-16 1989-05-16 Strikes My Fancy, Inc. Candle manufacturing apparatus
US20040093824A1 (en) * 2002-09-19 2004-05-20 Huber Donald G. Concrete forming apparatus for foundation pier blocks and a method for constructing pier blocks
US20080111049A1 (en) * 2003-09-19 2008-05-15 Huber Donald G Concrete Forming Apparatus for Foundation Pier Blocks and a Method for Constructing Pier Blocks
FR2957291A1 (fr) * 2010-03-11 2011-09-16 Omnium Tech D Etudes Et De Precontrainte O T E P Dispositif de maintien intercalaire en position d'armatures longitudinales de poutrelles en beton precontraint et procede utilisant un tel dispositif
US9254587B1 (en) * 2012-05-18 2016-02-09 Craig K. Thompson Modular endplate for prestressed precast concrete products
CN113183285A (zh) * 2021-05-21 2021-07-30 肖尧 一种钢筋混凝土预制墙体制作浇筑成型方法
CN115107145A (zh) * 2021-03-19 2022-09-27 广东博智林机器人有限公司 一种边模

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1004064C2 (nl) * 1996-09-18 1998-03-19 Leenstra Machine En Staalbouw Inrichting voor het vervaardigen van heipalen.
SG93922A1 (en) * 2001-06-07 2003-01-21 Housing & Dev Board Improved pre-stressed concrete formation
CN113547633B (zh) * 2021-07-12 2022-11-08 天工俐德科技发展有限公司 一种预应力非金属声屏障单元板生产工艺

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556928A (en) * 1948-01-27 1951-06-12 Vickers Electrical Co Ltd Mold for reinforced concrete structures
US2689999A (en) * 1950-05-26 1954-09-28 Concrete Products Co Apparatus for manufacturing prestressed concrete structural units
US2695754A (en) * 1951-07-03 1954-11-30 Dyckerhoff & Widmann Ag Railway track sleeper
US2721368A (en) * 1952-03-20 1955-10-25 Ellis E Landrum Concrete picket fence form
US2902743A (en) * 1953-07-27 1959-09-08 Bertell W King Concrete bulkhead, jetty or pile form
US2787043A (en) * 1954-07-16 1957-04-02 Johnnie E Daniell Block mold
US4253817A (en) * 1978-07-27 1981-03-03 Martin Concrete Engineering Company Concrete railroad tie casting and handling system
EP0183087A3 (en) * 1984-11-03 1988-07-20 Wayss & Freytag Aktiengesellschaft Shuttering for the series production of reinforced-concrete assembly units, in particular for prestressed sleepers of switches
EP0183087A2 (de) * 1984-11-03 1986-06-04 Wayss & Freytag Aktiengesellschaft Schalung für Serienfertigteile aus Stahlbeton, vornehmlich für vorgespannte Weichenschwellen
EP0180937A2 (de) * 1984-11-03 1986-05-14 Wayss & Freytag Aktiengesellschaft Schalung für Serienfertigteile aus Stahlbeton, vornehmlich für vorgespannte Weichenschwellen
EP0180937A3 (en) * 1984-11-03 1988-07-27 Wayss & Freytag Aktiengesellschaft Shuttering for the series production of reinforced concrete assembly units, in particular for prestressed sleepers of switches
US4653718A (en) * 1984-12-19 1987-03-31 Radva Corporation Molding structure for supporting preform inserts
US4830330A (en) * 1986-06-16 1989-05-16 Strikes My Fancy, Inc. Candle manufacturing apparatus
US7290750B2 (en) * 2002-09-19 2007-11-06 Donald G. Huber Concrete forming apparatus for foundation pier blocks and a method for constructing pier blocks
US20040093824A1 (en) * 2002-09-19 2004-05-20 Huber Donald G. Concrete forming apparatus for foundation pier blocks and a method for constructing pier blocks
US20080111049A1 (en) * 2003-09-19 2008-05-15 Huber Donald G Concrete Forming Apparatus for Foundation Pier Blocks and a Method for Constructing Pier Blocks
FR2957291A1 (fr) * 2010-03-11 2011-09-16 Omnium Tech D Etudes Et De Precontrainte O T E P Dispositif de maintien intercalaire en position d'armatures longitudinales de poutrelles en beton precontraint et procede utilisant un tel dispositif
US9254587B1 (en) * 2012-05-18 2016-02-09 Craig K. Thompson Modular endplate for prestressed precast concrete products
CN115107145A (zh) * 2021-03-19 2022-09-27 广东博智林机器人有限公司 一种边模
CN115107145B (zh) * 2021-03-19 2023-10-03 广东博智林机器人有限公司 一种边模
CN113183285A (zh) * 2021-05-21 2021-07-30 肖尧 一种钢筋混凝土预制墙体制作浇筑成型方法
CN113183285B (zh) * 2021-05-21 2022-08-09 湖南万众筑工科技有限公司 一种钢筋混凝土预制墙体制作浇筑成型方法

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Publication number Publication date
NL62650C (US08080257-20111220-C00005.png)
BE459586A (US08080257-20111220-C00005.png)
GB572387A (en) 1945-10-05

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