EP0263024B1 - Vorrichtung zum Entformen und Handhaben von in befestigten Formen gegossenen Betongegenständen - Google Patents

Vorrichtung zum Entformen und Handhaben von in befestigten Formen gegossenen Betongegenständen Download PDF

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Publication number
EP0263024B1
EP0263024B1 EP19870402160 EP87402160A EP0263024B1 EP 0263024 B1 EP0263024 B1 EP 0263024B1 EP 19870402160 EP19870402160 EP 19870402160 EP 87402160 A EP87402160 A EP 87402160A EP 0263024 B1 EP0263024 B1 EP 0263024B1
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EP
European Patent Office
Prior art keywords
product
lifting device
elements
lifting
mold
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.)
Expired - Lifetime
Application number
EP19870402160
Other languages
English (en)
French (fr)
Other versions
EP0263024A3 (en
EP0263024A2 (de
Inventor
Jean-Pierre Costamagna
Jean-Louis Feuillade
Paul Savard-Chambard
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.)
RECTOR S.A.
Original Assignee
RECTOR SA
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Filing date
Publication date
Application filed by RECTOR SA filed Critical RECTOR SA
Publication of EP0263024A2 publication Critical patent/EP0263024A2/de
Publication of EP0263024A3 publication Critical patent/EP0263024A3/fr
Application granted granted Critical
Publication of EP0263024B1 publication Critical patent/EP0263024B1/de
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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
    • 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
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/04—Discharging the shaped articles
    • B28B13/06—Removing the shaped articles from moulds
    • 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
    • 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
    • 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
    • B28B7/26—Assemblies of separate moulds, i.e. of moulds or moulding space units, each forming a complete mould or moulding space unit independently from each other
    • B28B7/266—Assemblies of separate moulds, i.e. of moulds or moulding space units, each forming a complete mould or moulding space unit independently from each other for making oblong objects, e.g. girders

Definitions

  • a fixed mold is a mold whose sides do not move apart.
  • the fixed mold technique is used in particular in the production of prestressed concrete products by adhesive wires, on a large bench, that is to say on benches 80 to 100 meters long. In these benches, the products can be long - in this case the mold is single or "unitary" and occupies the entire length of the bench - or short, of the order of ten meters, and then the molds are placed in one after the other and are crossed by the same bundle of prestressing wires.
  • the molds are arranged in batteries or modules.
  • Each module comprises, in a chassis, a plurality of identical molds, arranged parallel to each other others, and the modules are aligned between the ends of the bench.
  • each module there are combs defining the horizontal and vertical positions of the prestressing steels.
  • the products are demolded using a gantry moving longitudinally on the prestressing bench, this gantry lifting the concrete products horizontally using the combs indicated above.
  • ejectors mounted under the molds are used and their action allows automatic demolding of the reinforced or prestressed concrete elements, followed by formwork removal and handling by vacuum collection of products with suction cups. The product can then be cut into at least two pieces as required.
  • the object of the present invention is to avoid jamming during the demolding of the product, and to make it possible to manufacture a product in several elements in a single mold, the elements being demouldable simultaneously in a single operation.
  • the subject of the invention is a device for releasing an elongated product of reinforced or prestressed concrete poured into a mold with fixed walls, on a prestressing bench comprising at least one hydraulic release cylinder placed under the mold, and a hydraulic lifting suction cup. mounted on a lifting and handling device, characterized in that it comprises two horizontal stop bars, integral with the handling device, arranged above the product at each of its ends, transversely to said product, fixed in height by relative to the prestressing bench, at a height determined by the product, in order to limit the stroke of the jack in height and therefore to limit the displacement in height of the product and to control the release.
  • Figure 1 a schematic perspective view of the device according to the invention
  • Figure 2 a schematic profile view of the device according to the invention before demolding
  • Figure 3 a schematic profile view of the device according to the invention in the demolding and handling phase
  • Figure 4 a detail view of a first alternative embodiment of a separator element according to the invention
  • Figure 5 a detail view of a second alternative embodiment of a separator element according to the invention.
  • Figure 1 shows schematically a prestressing bench 1. It is a large bench, that is to say ranging from 80 to at least 100 meters long. This bench comprises at least one fixed mold 2, that is to say the sides of which are immobile.
  • the example illustrated presents a bench made up of several modules 3 one after the other, each comprising a plurality of molds 2 fixed, parallel, side by side.
  • the demolding device is positioned above a module 3 and is ready to demold the products contained in this module.
  • each mold 2 has openings 9 for passage of a jack 10.
  • a jack at each end; one can also use only one jack and distribute the force so as to obtain a balanced force over the length of the product 16; it is also possible to use a large number of cylinders all connected to the same hydraulic compressor.
  • the function of the jacks is to unmold and eject the product out of the mold upwards.
  • at least two suction cups 11, or other known vacuum system are placed on the product and lift it upwards.
  • suction cups are connected to a handling device 12 of the gantry type on wheels; and when the suction cups are sufficiently raised, taking the product 16 with them, the gantry can be moved to take the product to an annexed work area.
  • two horizontal bars 13 are provided, integral with the handling device 12, arranged near each end 14, 15 of the product 16, transversely to said product.
  • the handling device is fixed in height relative to the bench 1. For example, it can rest on the chassis of the prestressing bench or on the ground on which the bench is located.
  • each bar 13 is wedged in height, relative to the bench 1, at the distance D from the bench.
  • the bars are stationary and, when under the action of the jacks 10, the product rises in the mold, it meets and abuts on the bars 13.
  • the distance D is provided so as to avoid jamming 17 of the product, jamming which occurs when the inclination ⁇ with respect to the horizontal is too large, in particular when one end is ejected and the another is still in the mold.
  • the setting height D is determined according to the shape of the products, but it may also be necessary to provide variations of this height depending on the progress of the release, in particular as a function of the thickness of the product.
  • the bars have a setting height determined by the progression in height of the products.
  • the bars are connected to the handling device 12 by rigid telescopic rods 18, controlled by an operator or a computer not shown, which makes it possible to make the height D adjustable at will, the bar 13 being able during the same demolding operation be set at increasing heights D, D ⁇ , D ⁇
  • the product can be removed from the mold by successive progressions, each progression corresponding to a limit inclination of jamming, the total progression corresponding to the height of complete demolding.
  • the product After demolding, handling and depositing on a storage area, the product can be cut into sections to obtain several elements of concrete products.
  • the product in the fixed mold is divided longitudinally into at least two elements 20, 21 of prestressed concrete. These elements 20, 21 are aligned with each other and separated by a separating member 22 closely interposed between said elements.
  • each element 20, 21 is removed from the mold and ejected simultaneously by at least one jack 10, all the jacks being connected to the same hydraulic compressor P.
  • the separating member 22 consists of a single perforated part, FIG. 4.
  • This part comprises two vertical walls 26, 27, provided with grooves 28 for passage of the prestressing wires 30, and connected by a plate horizontal 29, located so as to allow access to the wires for cutting them after demolding.
  • the separating member consists of three parts, two lateral 31, 32 and a central 33.
  • the central part 33 engages in a V formed by the union of the two lateral parts 31, 32 as as shown in Figure 5.
  • the identical side pieces are the end walls of the concrete elements.
  • the central part is held between the lateral parts and can be removed to give access to the prestressing steels.
  • the three parts have openings for the passage of steel wires.

Landscapes

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

Claims (7)

  1. Vorrichtung zum Entformen von in einer festen Form hergestellten länglichen Erzeugnissen aus Stahl - oder Spannbeton, mit wenigstens einem unterhalb der Form angebrachten hydraulischen Zylinder sowie einem auf einer Hebe- und Fördereinrichtung angebrachten hydraulischen Saugheber, dadurch gekennzeichnet, daß zwei mit der Hebeeinrichtung fest verbundene, oberhalb des Erzeugnisses (16) und quer zu diesem angeordnete horizontale Stangen (13) vorgesehen sind, die zur Begrenzung des Hubs des Zylinders (10) in die Höhe auf einer vom Erzeugnis vorgebebenen Höhe (D) oberhalb des Vorspanntisches (1) festgelegt sind.
  2. Vorrichtung zum Entformen nach Anspruch 1, dadurch gekennzeichnet, daß sie ein vorgespanntes Erzeugnis (16), das wenigstens zwei in derselben Form (2) zueinander ausgerichtete Elemente (20,21) aufweist, eine eng zwischen die beiden Elemente derart eingefügtes Trennglied (22), daß die Elemente (20,21) und das Trennglied (22) ein einstückiges Bauteil bilden, und wenigstens einen hydraulischen Zylinder (10) unterhalb jedes Elementes (20,21), umfaßt.
  3. Vorrichtung zum Entformen nach Anspruch 2, dadurch gekennzeichnet, daß das Trennglied (22) wenigstens ein mit Einkerbungen (28) zum Durchgang der Stahldrähte versehenes, durchbrochenes Teil aufweist.
  4. Vorrichtung zum Entformen nach Anspruch 2, dadurch gekennzeichnet, daß das Trennglied drei Teile (31,32,33) umfaßt, deren jedes mit Schlitzen zum Durchgang der Stahldrähte (30) versehen ist, wobei das zentrale Teil (33) eine Form derart aufweist, daß sie formschlüßig zwischen die beiden anderen, zwischen sich ein V ausbildenden Teile (31,32) paßt, und daß es zur Freigabe des Zugangs zu den Stahldrähten entfernbar ist, wobei die beiden Teile mit den Enden der Elemente in Kontakt stehen.
  5. Vorrichtung zum Entformen nach Anspruch 1, dadurch gekennzeichnet, daß die Höhe (D) der Anbringung der Stangen nach Wunsch eingestellbar ist, wobei die Stange (13) während desselben Entformungsvorgangs anwachsende Höheneinstellungen nacheinander erfahren kann.
  6. Vorrichtung zum Entformen nach Anspruch 1, dadurch gekennzeichnet, daß ein Zylinder (10) an jedem Ende des Erzeugnisses (14,15) vorgesehen ist, wobei die Zylinder von derselben Druckquelle P beaufschlagt werden.
  7. Vorrichtung zum Entformen nach Anspruch 2, dadurch gekennzeichnet, daß die Zylinder (10) von derselben Druckquelle P beaufschlagt werden.
EP19870402160 1986-10-01 1987-09-28 Vorrichtung zum Entformen und Handhaben von in befestigten Formen gegossenen Betongegenständen Expired - Lifetime EP0263024B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8613683A FR2604944B1 (fr) 1986-10-01 1986-10-01 Dispositif perfectionne de demoulage et de manutention des produits en beton coules en moules fixes
FR8613683 1986-10-01

Publications (3)

Publication Number Publication Date
EP0263024A2 EP0263024A2 (de) 1988-04-06
EP0263024A3 EP0263024A3 (en) 1989-10-18
EP0263024B1 true EP0263024B1 (de) 1991-04-24

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EP19870402160 Expired - Lifetime EP0263024B1 (de) 1986-10-01 1987-09-28 Vorrichtung zum Entformen und Handhaben von in befestigten Formen gegossenen Betongegenständen

Country Status (2)

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EP (1) EP0263024B1 (de)
FR (1) FR2604944B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108660929A (zh) * 2018-04-26 2018-10-16 李福� 基于防止砼表面损坏的桥梁施工用小型平面模板拆除装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2116819B1 (es) * 1994-01-11 1999-03-16 Alvistranvi S A Procedimiento de fabricacion de traviesas polivalentes.
ES2217948B2 (es) * 2002-12-09 2005-11-16 Jose Antonio Martin Arcadio Instalacion desmoldeadora de placas de escayola.
BE1020140A3 (nl) * 2011-03-31 2013-05-07 Bonte International Bv Met Beperkte Aansprakelijkheid De Gietvorm voor het gieten van een betonnen element, werkwijze daarbij toegepast en productielijn daarmee uitgerust.
CN106965301B (zh) * 2017-04-18 2022-08-30 苏州久力砼业机械有限公司 一种预制混凝土梁柱构件的快速开合模模具及制作方法
CN112454638A (zh) * 2019-09-08 2021-03-09 崔成群 一种混凝土预制构件脱模码垛设备和一种简易吊车
CN112829052B (zh) * 2021-01-20 2022-09-20 万绍豪 一种用于生产用水泥板脱模设备
CN113172754A (zh) * 2021-04-22 2021-07-27 中电建十一局工程有限公司 一种管廊预制台座的制作方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR745023A (de) * 1933-05-01
GB708062A (en) * 1950-11-13 1954-04-28 Nat Res Dev Improvements in or relating to the production of concrete members
GB1249294A (en) * 1967-09-05 1971-10-13 Nat Res Dev Improvements in and relating to suction pads
FR2263357A1 (en) * 1974-03-04 1975-10-03 Toulpac Sa Void forming elements for concrete - is foam with cavity and notches for reinforcing bars
FR2434693A2 (fr) * 1977-03-28 1980-03-28 Costamagna & Cie B M Perfectionnements a la fabrication de produits precontraints
FR2458368A1 (fr) * 1979-06-13 1981-01-02 Freyssinet Int Stup Procede et dispositif de demoulage d'elements en beton precontraint moules sur un long banc

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108660929A (zh) * 2018-04-26 2018-10-16 李福� 基于防止砼表面损坏的桥梁施工用小型平面模板拆除装置

Also Published As

Publication number Publication date
EP0263024A3 (en) 1989-10-18
EP0263024A2 (de) 1988-04-06
FR2604944A1 (fr) 1988-04-15
FR2604944B1 (fr) 1990-08-10

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