US3792966A - Heating shuttering panels - Google Patents

Heating shuttering panels Download PDF

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Publication number
US3792966A
US3792966A US00298590A US3792966DA US3792966A US 3792966 A US3792966 A US 3792966A US 00298590 A US00298590 A US 00298590A US 3792966D A US3792966D A US 3792966DA US 3792966 A US3792966 A US 3792966A
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US
United States
Prior art keywords
heating
shuttering
panel
inlet
outlet
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Expired - Lifetime
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US00298590A
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English (en)
Inventor
A Kleiber
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Individual
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Individual
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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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/42—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for heating or cooling, e.g. steam jackets, by means of treating agents acting directly on the moulding material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/10—Forming or shuttering elements for general use with additional peculiarities such as surface shaping, insulating or heating, permeability to water or air

Definitions

  • ABSTRACT The specification describes a method of heating hollow shuttering panels for use in casting concrete and similar hardenable materials in which method hot air is used and is arranged to flow through the panel directly in contact with the internal surface of one or more of the sides of the panel.
  • a rectangular panel described by way of example the interior of the panel is divided, by partitions extending between the sides of the panel, to provide two manifolds extending along opposite edges of the panel and ducts extending between and communicating at their ends with the two manifolds.
  • Hot air from a heating means is passed into one of the manifolds, through the ducts to the other manifold and thence back to the heating means for reheating and recirculation.
  • the invention relates to a method of heating shuttering panels having cavities into which a heating medium is introduced, and to heated shuttering apparatus.
  • shuttering panels which may be designed to be heated in order to accelerate the setting process.
  • Shuttering panels of this kind are used singly, forexample in the horizontal position on tilting tables, or are used in the vertical position when made up into a set, which can either be stationary or transportable.
  • the known heating systems comprise pipe arrangements which are inserted in the shuttering panels and secured by various means. These pipe systems carry steam or hot oil, and high-pressure flexible connections have to be provided between the heating means and the shuttering panels.
  • a system of this kind, employing pipe arrangements is very expensive and carries serious disadvantages as regards the production of the shuttering panels and the carrying out of repairs.
  • a further disadvantage of the known pipe systems resides in the fact that heat is dissipated mainly at the surfaces of the pipes, so that the sheeting of the shuttering panels has to perform the function of distributing the heat across the area of the panels. This results in uneven distribution of heat and can, for example, lead to charring of the concrete in zones near the pipes if supervision is not carried out properly and heat is allowed to build up.
  • the object of the invention is to provide a method of heating shuttering panels which avoids the use of pipe systems likely to cause trouble and which results in substantially uniform heating of the surface of the shuttering. Accordingly the invention provides, in one aspect a method of heating a hollow shuttering panel comprising passing hot air, constituting the heating medium, from a heating means directly over the internal surface of at least one side of the panel.
  • the hollow interior of the shuttering panels may be open or subdivided, and the inflowing hot air heats the entire forming face or faces of the shuttering panel in a substantially uniform manner, and the likelihood of cracks developing as a result of the movements imparted by the vibrator is greatly reduced.
  • the pressure of the hot air used is conveniently just below or slightly above normal pressure and less than 3 atmos., so that high-pressure connections between the heating means and the shuttering panel are not required.
  • the heating means can simply take the form of an air heater with a fan unit, and heat losses are reduced by re-circulation of the heating medium.
  • the invention provides shuttering apparatus comprising a hollow shuttering panel comprising at least one side which has an external surface providing a moulding surface and which has an internal surface and having an inlet union and an outlet union, the panel providing within it a fluid flow path extending from the inlet union to the outlet union, at least part of which path is defined by the internal surface of the one side, and air heating means connected to supply hot air to the flow path through the inlet union and to receive the air back again from the outlet union for reheating.
  • the inlet union and the outlet union are fitted at opposite ends of one edge of the shuttering panel, and the heating means can be disposed adjacent such edge of the panel.
  • the shuttering panels can be arranged for movement relative to the stationary heating means over the floor, e.g., on rails or with the aid of bogeys fitted with rollers or spherical runners.
  • This arrangement is preferred for production lines in which the individual shuttering panels are first made up into a set, using panels that have come from a pretreatment line, and then passed as a set from the casting station to a heating station in which the heating means is connected to the shuttering panels.
  • the heating device it may be advantageous for the heating device to be displaceable relative to shuttering panels which are stationary, at least at the heating station, so that the individual shuttering panels or sets of shuttering panels can be successively connected to the heating means. In this way, considerable savings in the cost of the heating means can be achieved.
  • guide elements in the interior of the shuttering panel for directing the current of heating medium in the required manner.
  • guide elements can take various forms; for example they may be guide strips, perforated metal sheets, wire mesh and the like.
  • partitions containing openings of differing cross-sections such that the openings adjacent the inlet and outlet unions are of smaller cross-section than those more remote from the unions. In this way, the pressure-drop occurring during the movement of the hot air can be taken into account for the purpose of producing a uniform heating effect.
  • partitions which divide up the interior of the shuttering panel. This further increases the evenness of the heating.
  • FIG. 3 shows a shuttering panel, with parts thereof cut away, for use in an apparatus as shown in FIGS. 1 and 2.
  • FIGS. 1 and 2 illustrate a transportable set of shuttering panels 1, which can be moved on bogeys 2 and 3 travelling on rails 4 and 5 in a production line.
  • Each of the shuttering panels 1 has an inlet union 6 and an outlet union 7 on the same end edge for supplying and returning the heating medium.
  • the inlet and outlet unions 6 and 7 of each shuttering panel 1 are connected by resilient intermediate members in the form of flexible metal pipes 8 and 9, to the complementary unions l0 and 11 ofa heating means 12.
  • This heat-' ing means 12 consists of an electrical, gas-fired or oilfired heat-producing unit of which the hot air can be caused to circulate over a closed path through the hollow interior of the shuttering panels 1.
  • the unions 10 and 11 on the heating means 12 are disposed in parallel with each other between suitable ports or manifolds l3 and 14.
  • FIG. 1 The travel of the air inside a hollow shuttering panel is illustrated diagrammatically in FIG. 1 by means of flow-lines.
  • the air is caused to flow in the direction of these lines with the aid of guide elements, the form of which will be explained by reference to FIG. 3.
  • FIG. 3 shows a shuttering panel 1, parts of which are cut away to show the construction, having fitted internally thereof two partitions l7 and 18 forming passages 15 and 16 for the hot air.
  • the lower hot-air passage 15 communicates with the inlet union 6, and the upper hot-air passage 16 communicates with the outlet union 7 of the shuttering panel 1.
  • Each of the partitions 17 and 18 contains a row of openings 19 and 20 respectively, the cross-sectional areas of which increase with increasing distance from the inlet and outlet unions 6 and 7 respectively. In this way, the pressure-drop in the hot-air passage 15 and 16 can be taken into account for the purpose of achieving uniform distribution of the heating medium.
  • the interior of the shuttering panel is divided into a plurality of ducts by means of vertical separating walls 21 located between the partitions l7 and 18.
  • An opening 19, 20 in each of the partitions is provided opposite the ducts so that the manifolds l5, 16 formed by the partitions communicate with each other via the vertical ducts.
  • the shuttering panels 1 are produced as box-like hollow bodies and preferably are made of metallic materials having good thermal conductivity. To prevent heatlosses, appropriate lagging can be provided at the edges of the sides of the shuttering panels 1 and/or on the pipes connecting the panels to the heating means.
  • said shuttering boards each comprising a closed body having a heating space and having an inlet union and an outlet union at the same side edge of said shuttering board in connection with said heating space;
  • a heating air generator having connections, said inlet and outlet unions being fittable with said connections of said heating air generator to build up a closed heating air circuit for each of the hollow shuttering boards.
  • Apparatus according to claim 1 further comprising guiding elements positioned in said heating space of each of said hollow shuttering boards.
  • each of said guiding elements comprises distributing channels positioned at opposite sides within each of said hollow shuttering boards, and a plurality of parallel ducts extending from one distributing channel to the other, said distributing channels being in connection with said inlet and outlet unions and having apertures each communicating with the parts of said heating space formed by said parallel ducts, the area of said apertures in each of said channels progressively increasing from duct to duct in a direction away from said inlet and outlet unions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
US00298590A 1971-12-13 1972-10-18 Heating shuttering panels Expired - Lifetime US3792966A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2161707A DE2161707A1 (de) 1971-12-13 1971-12-13 Verfahren zum beheizen von schaltafeln und vorrichtung hierzu

Publications (1)

Publication Number Publication Date
US3792966A true US3792966A (en) 1974-02-19

Family

ID=5827790

Family Applications (1)

Application Number Title Priority Date Filing Date
US00298590A Expired - Lifetime US3792966A (en) 1971-12-13 1972-10-18 Heating shuttering panels

Country Status (6)

Country Link
US (1) US3792966A (fr)
JP (1) JPS4866614A (fr)
CH (1) CH557728A (fr)
DE (1) DE2161707A1 (fr)
FR (1) FR2166983A5 (fr)
GB (1) GB1387896A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53139616A (en) * 1977-05-12 1978-12-06 Ozawa Concrete Kogyo Kk Method of making concrete products using closeddtype mold
FR2456598A1 (fr) * 1979-05-17 1980-12-12 Arnal Louis Chauffage de bancs de predalles par recyclage d'air
JPS5939510A (ja) * 1982-08-31 1984-03-03 Katashi Aoki 型温調整方法
JPS6319367A (ja) * 1986-07-10 1988-01-27 大成プレハブ株式会社 コンクリ−ト部材の養生装置
JP4969096B2 (ja) * 2005-12-21 2012-07-04 岐阜工業株式会社 コンクリート打設用型枠

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US390697A (en) * 1888-10-09 Lumber-drier
US1291748A (en) * 1918-01-19 1919-01-21 Ernst Elias Brand Channel-furnace.
US2890863A (en) * 1954-04-30 1959-06-16 Robert K-F Scal Combined pressure cooling system and chassis for miniaturized radar
US3661372A (en) * 1970-10-27 1972-05-09 Koppers Co Inc Water-cooled panel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US390697A (en) * 1888-10-09 Lumber-drier
US1291748A (en) * 1918-01-19 1919-01-21 Ernst Elias Brand Channel-furnace.
US2890863A (en) * 1954-04-30 1959-06-16 Robert K-F Scal Combined pressure cooling system and chassis for miniaturized radar
US3661372A (en) * 1970-10-27 1972-05-09 Koppers Co Inc Water-cooled panel

Also Published As

Publication number Publication date
CH557728A (de) 1975-01-15
FR2166983A5 (fr) 1973-08-17
JPS4866614A (fr) 1973-09-12
GB1387896A (en) 1975-03-19
DE2161707A1 (de) 1973-06-28

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