EP0127593A2 - Aufweitbare Vorrichtung mit einer gesteuerten Dehnung - Google Patents

Aufweitbare Vorrichtung mit einer gesteuerten Dehnung Download PDF

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Publication number
EP0127593A2
EP0127593A2 EP84830157A EP84830157A EP0127593A2 EP 0127593 A2 EP0127593 A2 EP 0127593A2 EP 84830157 A EP84830157 A EP 84830157A EP 84830157 A EP84830157 A EP 84830157A EP 0127593 A2 EP0127593 A2 EP 0127593A2
Authority
EP
European Patent Office
Prior art keywords
enlarged
controlled expansion
enlargeable
shuttering
hereinbefore
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.)
Withdrawn
Application number
EP84830157A
Other languages
English (en)
French (fr)
Other versions
EP0127593A3 (de
Inventor
Verio Scarafoni
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0127593A2 publication Critical patent/EP0127593A2/de
Publication of EP0127593A3 publication Critical patent/EP0127593A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/28—Cores; Mandrels
    • B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
    • 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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
    • B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
    • B28B21/18—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using expansible or retractable mould or core elements
    • 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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/86—Cores
    • B28B21/88—Cores adjustable, collapsible or expansible

Definitions

  • This invention concerns a device which can be enlarged with a controlled expansion and is suitable for forming at least part of a shuttering to make concrete elements.
  • Such device of the invention can be employed to make either simple concrete elements or reinforced concrete elements, and such elements can consist of concrete which is prestressed or not.
  • This device enables concrete elements to be made with a moulding procedure without any limitation of form and can be included in shuttering to obtain linear elements, cylindrical elements, etc., whether such elements be full or contain one or more hollows.
  • a procedure to mould concrete which permits costs to be reduced, savings of materials to be obtained, quality to be improved and production times to be reduced.
  • the device of the invention enables the cast concrete to be compressed as poured into appropriate shuttering of any type and size by means of a pre-set, controlled displacement of one or more surfaces of the device.
  • the device of the invention may have such movable surfaces positioned inside or outside the element to be made, and such movable surfaces may involve a part or the whole of the inner and outer surfaces.
  • the device of the invention enables very slender thicknesses of concrete, even of the order of 30 mm. or less, to be obtained.
  • the device of the invention can be readily manoeuvred either during filling or during withdrawal and can be worked by one single operator.
  • a device working as an inner element of shuttering that is to say, a device able to exert pressure from the inside outwards on a concrete product, which is therefore pre-supposed to be a product containing one or more hollow spaces.
  • the invention can be embodied as a part of a shuttering element able to produce full elements containing no hollows.
  • the device of the invention can obtain controlled expansion with several forms and means, and the scope of the invention covers one or another equivalent device.
  • the opposed shuttering (outer shuttering in the case we shall now describe) will consist advantageously of a structure perforated transversely so as to permit communication between its outside and inside and lined inside with a material suitable for letting water pass through but able to withhold other substances, including the adhesives present in the concrete.
  • This lining material which is permeable to water but not to other substances is a material known in itself and we shall not dwell upon it further.
  • the opposed shuttering (outer shuttering in the case we shall describe) has, therefore, the shape required and a substantially perforated wall of steel plate lined, on its face in contact with the concrete, with the material which lets water and air pass through but not the adhesive substances.
  • the water and air contained in the cast concrete can therefore flow freely, following the shortest way and obtaining a perfect distribution of residual moisture throughout the whole body of the product.
  • Such uniformity of moisture is important since it corresponds to uniformity of compactness, which ensures a high degree of dimensional stability and safety as regards the specific requirements at all points in the product.
  • such device which can be enlarged with a controlled expansion according to the invention is positioned on the inner side of the shuttering, a suitable hollow space being left between the outer and inner elements of the shuttering.
  • This enlargeable device has on its outside an impermeable sheath of resilient material, which fulfils the manifold tasks of a hydraulic insulation for the mechanical device located within itself, of a continuous element to distribute thrust and of a resilient element to cause return of the various component parts of the device.
  • These enlargeable elements can expand either owing to the expansion of a tubular element within which a fluid under pressure can enter or owing to the action of latches, wedges, cams, jacks, etc.
  • the invention is therefore embodied with a device which can be enlarged with a controlled expansion and is suitable for carrying out a method for the moulding of concrete and which can process simple or reinforced concrete and is characterized by comprising impermeable, resilient sheath means cooperating with at least one movable element, at least one enlargeable element being included between a bearing structure of the device and the movable element.
  • a device 10 is an enlargeable device the expansion of which takes place along its whole periphery, and is suitable for being fitted as an inner shuttering element to make concrete elements.
  • the scope of the invention also comprises the ability to embody the device also as an outer shuttering element or as a partial shuttering element.
  • the device 10 comprises an impermeable, resilient sheath 11 which enwraps the device 10 about the whole periphery that comes into contact with the body of the concrete as cast.
  • Such sheath 11 performs the manifold functions of an insulation for the inner mechanism of the device 10, of a resilient element to cause return (in the event that the device 10 is able to permit this function) and of an element to even out the thrust pressure.
  • a bearing structure 12 is lodged within the impermeable, resilient sheath 11 and serves to support, guide and position the various elements of the device of the invention.
  • the bearing structure 12 cooperates with movable elements 13-113, which can be formed with various shapes to suit the shape of the concrete product to be made.
  • the structure 12 and movable element 13 respectively comprise guides 15 and 115 which cooperate with each other and are suitable for permitting a guided, controlled, straight movement.
  • Such guides 15-115 are shown better in Fig.6, in which it is possible to see that the movable element 13 comprises a plate 213 that serves as an intermediate means against the impermeable sheath means 11.
  • the movable element 13 comprises also abutments 121, which cooperate with abutments 21 included in the guides 15 of the bearing structure 12.
  • the movable element 13 can be guided in its movement, and its greatest displacement is governed so as to-obviate excessive outward movements, deformations, etc.
  • enlargeable elements 14 are provided in cooperation with the movable elements 13-113 and consist here of tubular elements within which a fluid under pressure can enter.
  • FIG.l shows the tubular elements 14 flattened, whereas in Fig.2 the tubular elements 14 are expanded by the action of the fluid under pressure.
  • Fig.4 shows an application for the production of cylindrical concrete pipes.
  • These cylindrical pipes can be of a type with or without a reinforcement. They can also be of a prestressed type or otherwise.
  • Fig.4 shows an outer shuttering structure 16 made of perforated steel plate and lined on its inside with a semi-impermeable covering 17.
  • This semi-impermeable covering 17 is able to let water and air pass through but withholds other substances, including the adhesives contained in the concrete.
  • the outer structure 16 is positioned in a base 20, which may include some seatings for an alignment pin 26 able to cause automatic alignment of the enlargeable device 10.
  • the base 20 can include means able to drain the water leaving through the perforated structure 16.
  • Such means can consist, for instance, of channels, drip ducts or other types of drainage means able to discharge water.
  • Substantially tubular enlargeable elements 14 are provided in the movable elements 13 and are connected to a manifold 24 by joints 25,the working pressure of which can be checked with a pressure gauge 23, for example.
  • a safety valve 28 and one or more fluid intakes 29 can be provided on the manifold 24.
  • the device 10 can be equipped with one or more lifting rings 22 for handling by a lift truck, bridge crane or crane.
  • the device 10 when the outer structure 16 together with the semi-impermeable covering 17 and a possible funnel-shaped shield 18 has been positioned, the device 10 is arranged in such a way that a required chamber is created between the device 10 and the outer shuttering structure.
  • the required quantity of concrete is poured through the zone 27 for pouring the concrete casting and the device 10 is then actuated.
  • One or more vibrators 30 may be provided to cooperate with the device 10 and may be positioned either on the outside of the outer structure 16 or on the inside of the device 10 itself or may be located in the base 20.
  • the fluid under pressure is sent into the manifold 24 and the pressure of such fluid is checked with a pressure gauge 23.
  • the fluid under pressure enters the enlargeable elements 14, which in this case consist of tubular elements, and expands them.
  • the enlargeable elements 14 can be embodied as tubular elements which can be entered by fluid under pressure, or else can consist of cams 114, as in Figs.7, for instance, where the cams can be seen in their position of rest (Fig.7a) and in their position of maximum opening (Fig.7b).
  • cams 114 perform the same function as the enlargeable element 14 and are therefore equivalents.
  • Levers can be provided instead of the cams, or else wedges, jacks, etc. can be provided instead of the cams, that is to say, means can be provided which are able to obtain a controlled displacement of the element 13 in relation to the bearing structure 12.
  • the device 10 can be embodied as a part of a shuttering and in such an event will form only one side of the shuttering.
  • a plurality of elements 213 cooperating with each other by means of teeth or equivalent means is provided.
  • Such teeth serve to maintain proper circumferential alignment between the various elements 213.
  • the rubber sheath 11 has been removed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Springs (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Reinforcement Elements For Buildings (AREA)
EP84830157A 1983-05-30 1984-05-21 Aufweitbare Vorrichtung mit einer gesteuerten Dehnung Withdrawn EP0127593A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT482183 1983-05-30
IT8304821A IT1208962B (it) 1983-05-30 1983-05-30 Elemento espandibile a dilatazione controllata ed agente a mezzo di fluidi in pressione.

Publications (2)

Publication Number Publication Date
EP0127593A2 true EP0127593A2 (de) 1984-12-05
EP0127593A3 EP0127593A3 (de) 1985-08-07

Family

ID=11114336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84830157A Withdrawn EP0127593A3 (de) 1983-05-30 1984-05-21 Aufweitbare Vorrichtung mit einer gesteuerten Dehnung

Country Status (5)

Country Link
EP (1) EP0127593A3 (de)
JP (1) JPS606410A (de)
ES (1) ES532898A0 (de)
IT (1) IT1208962B (de)
PT (1) PT78663B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0227753A4 (de) * 1985-06-18 1988-05-19 Graeme Reginald Hume Schnellgiessverfahren für lange hohlbetonerzeugnisse.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0371808A (ja) * 1989-08-10 1991-03-27 Natl House Ind Co Ltd コンクリート部材の製造方法
ES2061359B1 (es) * 1992-07-02 1997-04-01 Lopez Victor Pena Molde recuperable para la construccion "in situ" de nichos de hormigon.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE419216A (de) *
DE714213C (de) * 1936-03-06 1941-11-24 Zeppelin Wohlfahrt G M B H Ausweitbarer Kern fuer die Herstellung von Hohlformsteinen
US2170188A (en) * 1937-10-30 1939-08-22 Walter H Cobi Collapsible core
US2315634A (en) * 1941-06-23 1943-04-06 Harold C Mccall Expansible core mold
US2730783A (en) * 1950-10-12 1956-01-17 Lock Joint Pipe Co Apparatus for forming concrete pipes and other hollow bodies
FR1122008A (fr) * 1955-01-31 1956-08-30 Noyau expansible pour la fabrication de produits de forme bien définie, à partir de matières pulvérulentes
US3021900A (en) * 1957-10-10 1962-02-20 Marchioli Giorgio Apparatus for manufacturing pipes from plastic materials
NO130101B (de) * 1968-11-13 1974-07-08 Fulguritwerke Seelze U Oesterh
DE2453706C2 (de) * 1974-11-13 1982-08-26 WKR Patentverwertungsgesellschaft mbH, 6833 Waghäusel Einstückige Kernschalung zum Herstellen von großflächigen Bauteilen mit Hohlräumen großer Breite

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0227753A4 (de) * 1985-06-18 1988-05-19 Graeme Reginald Hume Schnellgiessverfahren für lange hohlbetonerzeugnisse.

Also Published As

Publication number Publication date
IT8304821A0 (it) 1983-05-30
JPS606410A (ja) 1985-01-14
IT1208962B (it) 1989-07-10
ES8504005A1 (es) 1985-04-16
PT78663A (en) 1984-06-01
ES532898A0 (es) 1985-04-16
EP0127593A3 (de) 1985-08-07
PT78663B (en) 1986-08-08

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Effective date: 19860408