EP1108830A1 - Tubular formwork and method for placing and stripping it - Google Patents

Tubular formwork and method for placing and stripping it Download PDF

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Publication number
EP1108830A1
EP1108830A1 EP99125030A EP99125030A EP1108830A1 EP 1108830 A1 EP1108830 A1 EP 1108830A1 EP 99125030 A EP99125030 A EP 99125030A EP 99125030 A EP99125030 A EP 99125030A EP 1108830 A1 EP1108830 A1 EP 1108830A1
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EP
European Patent Office
Prior art keywords
layer
tear strip
formwork
plastic
cardboard
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.)
Granted
Application number
EP99125030A
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German (de)
French (fr)
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EP1108830B1 (en
Inventor
Johannes Wilhelmus Van De Camp
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Sonoco Development Inc
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Sonoco Development Inc
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Filing date
Publication date
Priority to EP99125030A priority Critical patent/EP1108830B1/en
Application filed by Sonoco Development Inc filed Critical Sonoco Development Inc
Priority to ES99125030T priority patent/ES2167985T3/en
Priority to DE59900655T priority patent/DE59900655D1/en
Priority to AT99125030T priority patent/ATE208851T1/en
Priority to US09/651,868 priority patent/US6467749B1/en
Priority to CA002326014A priority patent/CA2326014C/en
Priority to PL00344515A priority patent/PL344515A1/en
Priority to NO20006368A priority patent/NO316030B1/en
Publication of EP1108830A1 publication Critical patent/EP1108830A1/en
Application granted granted Critical
Publication of EP1108830B1 publication Critical patent/EP1108830B1/en
Anticipated expiration legal-status Critical
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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • B28B7/364—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article of plastic material or rubber
    • 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
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/342—Moulds, cores, or mandrels of special material, e.g. destructible materials which are at least partially destroyed, e.g. broken, molten, before demoulding; Moulding surfaces or spaces shaped by, or in, the ground, or sand or soil, whether bound or not; Cores consisting at least mainly of sand or soil, whether bound or not
    • 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
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
    • E04G13/021—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor for circular columns

Definitions

  • the invention relates to a formwork tube for concreting of columns, supports and similar components, with one two-layer pipe wall, the outer layer of which is made of cardboard and its inner layer is seamless and rigid made of plastic and with the outer Layer is firmly connected.
  • the invention also relates to a procedure for striking and stripping columns, supports and similar devices using one Scarf tube.
  • Cardboard formwork tubes have long been used for concreting Columns, supports, pillars and similar components are used.
  • the formwork tubes are made of several superimposed paper strips or layers wound spirally. by virtue of this spiral winding is created on the inside and spiraling on the outside of the formwork tube Seams between the individual strips of paper.
  • Will be one Formwork tube for the manufacture of a column or the like with Filled with concrete the existing ones are formed on the inside of the pipe Seams on the outside of the resulting component which is often perceived as annoying with a concrete visible surface is required and corresponding rework is required.
  • Furthermore can also change the fiber structure of the inside of the cardboard tube map on the outside of the concrete part, and it can even paper fibers stick to the concrete surface.
  • US 4,957,270 is a spiral wound formwork tube made of cardboard or paper on the inside of a sheet of paper covered, which covers the spiral seams.
  • this paper sheet On inside is this paper sheet with a thin moisture-proof plastic layer coated.
  • the fiber structure of the paper sheet is deliberately pushed through through the thin plastic layer and forms on the Surface of the concrete component.
  • the inner wall formed by the sheet of paper on the merged, opposite paper sheet edges one Seam that is reflected in the concrete surface.
  • the paper sheet is attached to this seam with an adhesive strip held together, which is also in the concrete surface pulls the trigger.
  • the present invention has the object based on improving a generic formwork tube so that neither through the formwork tube itself nor through the stripping process Imprints in the surface of the concrete element or damage.
  • this object is achieved with a formwork tube type mentioned solved in that on the inner surface the cardboard layer one in the longitudinal direction of the tube over the entire Pipe-length tear strip is attached, with which the cardboard layer is tearable, that the plastic is a thermoplastic and the plastic layer is the tear strip completely covered, the material of the Tear strip is chosen so that it from the plastic layer remains detachable, and that the tear strip in its width direction is rigid and its width is chosen so that by tearing in the cardboard layer resulting gap the heat-emitting part of a Heating device is feasible.
  • a method is also used to achieve the object for striking and stripping columns, supports and similar Components proposed in the formwork Formwork tube according to the invention is used and in the Strip the cardboard layer open with the tear strip is the heat-emitting part of a heater in the created gap in the cardboard layer and the Plastic layer is heated, the heated soft plastic layer with a blunt object and then the formwork tube is removed from the component.
  • the measures according to the invention make concrete surfaces achieved that contain no unwanted prints and also have no scratch marks or similar damage, that can arise when stripping. With that on the Tear strips attached to the inner wall of the cardboard layer the cardboard layer can easily be torn open when stripping be, with the tearing of the tear strip from a corresponding cardboard strip is torn out of the cardboard layer becomes.
  • the tear strip separates accordingly selected material easily from the thermoplastic Plastic layer. Since the tear strip in his Width direction essentially maintains its initial shape and its width is suitably chosen, can be in the gap Tear strip and the cardboard strip torn from it leave a heating element with which the plastic layer that the finished concrete element still encloses and according to the invention from a thermoplastic Material is formed, is heated. Due to the Warming softens the thermoplastic. He can be separated with a blunt object without Any scratches or streaks appear in the concrete surface.
  • the tear strip is preferably a plastic tape.
  • the tear strip can have one on its longitudinal edges have continuous wire. Because of the cutting effect of the two parallel wires can be formed with one Tear strips the cardboard layer more easily torn open or a cardboard strip is more easily torn out of this.
  • the tear strip an adhesive tape.
  • the tear strip can then be opened the inner wall of the cardboard layer will be glued, causing the manufacturing cost is reduced.
  • the Tear strips at least from one pipe end to the outside out to form a gripping section. On This ensures that the cardboard layer is torn open quickly.
  • the width of the tear strip is preferably at least 10 mm. In many cases this is sufficient large gap for the passage of the heat emitting Part of a heater created.
  • thermoplastic Polyurethane doesn't just make a smooth concrete surface generated, but it also exhibits a relative low softening point and is easy to dispose of, because it can be burned like paper, for example.
  • thermoplastic especially polyurethane
  • a blowtorch can advantageously be used. hereby the technical effort for stripping is kept low.
  • a knife back is used to safely cut and scratch marks to avoid.
  • a Formwork tube 1 has a cylindrical tube wall 2, which consists of a radially outer layer 3 of paper or cardboard and a radially inner plastic layer 4 is formed is.
  • the radially outer cardboard layer 3 is made up of a number paper strips lying next to and on top of each other in a spiral wound and forms an inner wall 5 with a predetermined Diameter.
  • the inside diameter is preferably in the range between 250 mm and 800 mm.
  • In the inner wall 5 run butt joints between the side by side lying paper strips.
  • the spiral wound paper strips are glued together.
  • the number of one above the other lying paper layers is adapted to the respective requirements, to have sufficient strength and rigidity To reach cardboard layer.
  • a tear strip 6, which in example shown an approximately 18 mm wide plastic tape is, e.g. a 3M Scotch plastic tape.
  • the plastic band 6 is coated on one side with an adhesive and on the Glued inner wall 5 of the cardboard layer 3.
  • the plastic band 6 extends over the entire length of the formwork tube 1 and protrudes outwards at a pipe end by a predetermined one Length out of the pipe.
  • the outstanding length of the plastic strap 6 is long enough for easy grasping to ensure the plastic band 6, and on the outside the cardboard layer 3 glued. For example, the outstanding Length be 0.5 m.
  • a polyurethane layer is on the inner wall 5 of the cardboard layer 3 4 applied by centrifugal casting, so that the polyurethane layer 4 no seams or other unwanted Has elevations or depressions that are on the surface of the component to be concreted.
  • the thickness of the polyurethane layer 4 is chosen so that the spiral seams bridged in the inner wall 5 of the cardboard layer 3 are and the plastic tape 6 fully embedded and is covered so that neither the spiral seams nor the Plastic tape 6 still the fiber structure of the cardboard layer 3 in map the surface of the concrete part.
  • the material of the plastic band 6 is on the polyurethane layer 4 in the way that it is not fixed with this connects, but is easily separable from it.
  • At the radially inner wall 7 of the thermoplastic layer 4 can also additional (not shown) Formwork elements are attached to cavities in the concrete, for example for sockets to train.
  • Gap 8 formed in the cardboard layer 3 can (not shown) heating element, for example a blowtorch, be passed through until it rests on the plastic layer 4 or at least in the vicinity.
  • the plastic layer 4 is now heated along the gap 8 and softens due to their thermoplastic properties.
  • the warmed soft Plastic layer 4 is now covered with a blunt object, e.g. a knife back or a blunt knife edge, cut along the entire length of the formwork tube 1.
  • the separated formwork tube 1 is then from the concrete component decreased.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Laminated Bodies (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

A shuttering tube for producing concrete columns, supports etc, comprises a double layered wall, whose outer layer consists of card and whose inner layer consists of plastic. The inner wall (5) of the card layer (3) has a tear open strip (6) which enables the card layer to be ripped open. The plastic is a thermoplast, and covers the tear open strip. The latter consists of a material which can detach itself from the plastic layer (4). The strip is stiff over its width, and its width is chosen so that a heating unit can be located in the gap formed when the card is opened.

Description

Die Erfindung bezieht sich auf ein Schalrohr zum Betonieren von Säulen, Stützen und ähnlichen Bauelementen, mit einer zweischichtigen Rohrwand, deren äußere Schicht aus Pappe hergestellt ist und deren innere Schicht nahtlos und verformungssteif aus Kunststoff gebildet und mit der äußeren Schicht fest verbunden ist. Die Erfindung bezieht sich auch auf ein Verfahren zum Ein- und Ausschalen von Säulen, Stützen und ähnlichen Bauelementen unter Verwendung eines solchen Schalrohrs.The invention relates to a formwork tube for concreting of columns, supports and similar components, with one two-layer pipe wall, the outer layer of which is made of cardboard and its inner layer is seamless and rigid made of plastic and with the outer Layer is firmly connected. The invention also relates to a procedure for striking and stripping columns, supports and similar devices using one Scarf tube.

Schalrohre aus Pappe werden seit langem zum Betonieren von Säulen, Stützen, Pfeilern und ähnlichen Bauteilen eingesetzt. Die Schalrohre sind aus mehreren übereinanderliegenden Papierstreifen bzw. -lagen spiralförmig gewickelt. Aufgrund dieser spiralförmigen Wicklung entstehen an der Innenseite und an der Außenseite des Schalrohrs spiralförmig verlaufende Nähte zwischen den einzelnen Papierstreifen. Wird solch ein Schalrohr zur Herstellung einer Säule oder dergleichen mit Beton gefüllt, bilden sich die auf der Rohrinnenseite vorhandenen Nähte auf der Außenseite des entstehenden Bauteils ab, was bei einer Betonsichtfläche häufig als störend empfunden wird und entsprechende Nacharbeiten erfordert. Darüber hinaus kann sich auch die Faserstruktur der Innenseite des Papprohrs auf der Außenseite des Betonteils abbilden, und es können sogar Papierfasern an der Betonfläche haften bleiben.Cardboard formwork tubes have long been used for concreting Columns, supports, pillars and similar components are used. The formwork tubes are made of several superimposed paper strips or layers wound spirally. by virtue of this spiral winding is created on the inside and spiraling on the outside of the formwork tube Seams between the individual strips of paper. Will be one Formwork tube for the manufacture of a column or the like with Filled with concrete, the existing ones are formed on the inside of the pipe Seams on the outside of the resulting component which is often perceived as annoying with a concrete visible surface is required and corresponding rework is required. Furthermore can also change the fiber structure of the inside of the cardboard tube map on the outside of the concrete part, and it can even paper fibers stick to the concrete surface.

In der US-2,677,165 wird vorgeschlagen, auf die Papierstreifen, die die Innenseite des Schalrohrs bilden, einen Polyethylen-Film aufzubringen. Hierdurch wird zwar das Haftenbleiben und Abbilden von Papierfasern an der Betonfläche vermieden, jedoch sind die Nähte zwischen den Papierstreifen weiterhin vorhanden und dementsprechend auf der Betonoberfläche abgebildet. Zur leichteren Entfernung des Schalrohrs von dem abgebundenen Bauelement wird in dieser Druckschrift noch vorgeschlagen, auf der Innenseite des Schalrohrs zwei sich diametral gegenüberliegende Schneiddrähte anzuordnen, die sich jeweils über die gesamte Länge des Schalrohrs erstrecken und mit denen beim Ausschalen das Schalrohr aufgerissen und in zwei Hälften geteilt werden kann, die sich von dem Betonelement leicht abnehmen lassen. Nachteilig ist hierbei, daß sich auch diese Schneiddrähte auf der Oberfläche des Bauelementes abbilden.In US 2,677,165 it is suggested that on the paper strips, which form the inside of the formwork tube, a polyethylene film applied. This will adhere and avoid depicting paper fibers on the concrete surface, however, the seams are between the paper strips still available and accordingly on the concrete surface displayed. For easier removal of the formwork tube from the set component is still in this document proposed two yourself on the inside of the formwork tube to arrange diametrically opposite cutting wires that extend over the entire length of the formwork tube and with which the formwork tube is torn open and can be divided in half, which is different from the concrete element can be easily removed. The disadvantage here is that these cutting wires are also on the surface of the component depict.

Aus dem DE-GM 89 05 989.1 ist es bekannt, auf der Innenseite eines Schalrohrs aus spiralförmig gewickeltem Papier ein Aufreißelement anzuordnen. Dieses Aufreißelement kann faden- oder bandförmig sein, wobei es sich in bandförmiger Ausbildung beim Ziehen automatisch zu einem runden Faden verdrillen soll, um die Rohrwand problemlos durchtrennen zu können. Auch bei diesem vorbekannten Schalrohr sind die Nähte zwischen den Papierstreifen auf der Innenseite sowie das Aufreißelement auf der Oberfläche des fertigen Betonteils abgebildet. Ferner ist die Faserstruktur des Schalrohrs auf der Betonoberfläche sichtbar und bleiben an dieser Faser hängen. In dieser Entgegenhaltung wird auch vorgeschlagen, zur Erzielung eines nichtrunden Schalungsquerschnitts das Schalrohr in seinem Inneren mit einer Auskleidung zu versehen. Das Aufreißelement ist hierbei auf der Innenseite der Auskleidung angeordnet und damit auf der Betonoberfläche abgebildet.From DE-GM 89 05 989.1 it is known on the inside a tear-off element of a formwork tube made of spirally wound paper to arrange. This tear-open element can or be ribbon-shaped, being in ribbon-shaped formation automatically twist into a round thread when pulling should, in order to be able to easily cut through the pipe wall. Also in this known formwork tube, the seams between the Paper strips on the inside and the tear element mapped on the surface of the finished concrete part. Further is the fiber structure of the formwork tube on the concrete surface visible and stick to this fiber. In this document is also suggested to achieve a non-round formwork cross-section the formwork tube in its To be lined inside. The tear element is arranged on the inside of the lining and mapped onto the concrete surface.

Gemäß der US-4,957,270 ist ein spiralgewickeltes Schalrohr aus Pappe bzw. Papier auf seiner Innenseite von einem Papierbogen abgedeckt, der die spiralförmigen Nähte überdeckt. Auf seiner Innenseite ist dieser Papierbogen mit einer dünnen feuchtigkeitsundurchlässigen Kunststoffschicht beschichtet. Die Faserstruktur des Papierbogens drückt sich gewollt durch die dünne Kunststoffschicht hindurch und bildet sich auf der Oberfläche des betonierten Bauteils ab. Ferner weist auch die durch den Papierbogen gebildete Innenwand an den zusammengeführten, einander gegenüberliegenden Papierbogenrändern eine Naht auf, die sich in der Betonoberfläche abbildet. Darüber hinaus wird der Papierbogen an dieser Naht durch einen Klebestreifen zusammengehalten, der sich ebenfalls in der Betonoberfläche abdrückt.According to US 4,957,270 is a spiral wound formwork tube made of cardboard or paper on the inside of a sheet of paper covered, which covers the spiral seams. On inside is this paper sheet with a thin moisture-proof plastic layer coated. The fiber structure of the paper sheet is deliberately pushed through through the thin plastic layer and forms on the Surface of the concrete component. Furthermore, the the inner wall formed by the sheet of paper on the merged, opposite paper sheet edges one Seam that is reflected in the concrete surface. About that In addition, the paper sheet is attached to this seam with an adhesive strip held together, which is also in the concrete surface pulls the trigger.

Um auf der Oberfläche des hergestellten Betonelementes Abdrücke aller Art zu vermeiden, gleichgültig ob von Faserstrukturen, Spiralnähten, Längsnähten oder von irgendwelchen Hilfsmitteln, wird in der US-5,874,016 vorgeschlagen, auf die Innenwand eines spiralgewickelten Schalrohrs eine verformungssteife Epoxidharzschicht durch Schleuderguß aufzubringen. Hierdurch wird zwar eine glatte Schalrohr-Innenseite erzielt, jedoch ist es schwierig, das Schalrohr bzw. die Epoxidharzschicht von der Betonoberfläche des abgebundenen Betons zu lösen. Bei dem aus der US-5,874,016 bekannten Schalrohr wird zum Ausschalen die Pappschicht mit einer Säge aufgeschnitten und die Epoxidharzschicht mit einem Brecheisen entfernt. Es müssen somit spitze oder scharfe Werkzeuge eingesetzt werden, wie z.B. Sägen und Brecheisen, die wiederum Spuren auf der Betonoberfläche hinterlassen.To make impressions on the surface of the manufactured concrete element to avoid all types, regardless of whether from fiber structures, Spiral seams, longitudinal seams or any Aid is proposed in US 5,874,016 to which Inner wall of a spiral-wound formwork tube is rigid Apply the epoxy resin layer by centrifugal casting. This will make the inside of the formwork tube smooth achieved, but it is difficult to formwork tube or the epoxy resin layer from the concrete surface of the set concrete to solve. In the formwork tube known from US Pat. No. 5,874,016 the cardboard layer is cut open with a saw to remove the formwork and the epoxy resin layer with a crowbar away. Pointed or sharp tools must therefore be used such as Saws and crowbars, which in turn Leave traces on the concrete surface.

Demgegenüber liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein gattungsgemäßes Schalrohr so zu verbessern, daß weder durch das Schalrohr selbst noch durch den Ausschalvorgang in der Oberfläche des fertig betonierten Bauteils Abdrücke oder Beschädigungen entstehen.In contrast, the present invention has the object based on improving a generic formwork tube so that neither through the formwork tube itself nor through the stripping process Imprints in the surface of the concrete element or damage.

Erfindungsgemäß wird diese Aufgabe bei einem Schalrohr der eingangs genannten Art dadurch gelöst, daß auf der Innenfläche der Pappschicht ein in Rohrlängsrichtung über die gesamte Rohrlänge verlaufender Aufreißstreifen angebracht ist, mit dem die Pappschicht aufreißbar ist, daß ferner der Kunststoff ein Thermoplast ist und die Kunststoffschicht den Aufreißstreifen vollständig überdeckt, wobei das Material des Aufreißstreifens so gewählt ist, daß dieser von der Kunststoffschicht lösbar bleibt, und daß der Aufreißstreifen in seiner Breitenrichtung verformungssteif ist und seine Breite so gewählt ist, daß durch den beim Aufreißen in der Pappschicht entstehenden Spalt der wärmeabgebende Teil einer Heizeinrichtung führbar ist. According to the invention, this object is achieved with a formwork tube type mentioned solved in that on the inner surface the cardboard layer one in the longitudinal direction of the tube over the entire Pipe-length tear strip is attached, with which the cardboard layer is tearable, that the plastic is a thermoplastic and the plastic layer is the tear strip completely covered, the material of the Tear strip is chosen so that it from the plastic layer remains detachable, and that the tear strip in its width direction is rigid and its width is chosen so that by tearing in the cardboard layer resulting gap the heat-emitting part of a Heating device is feasible.

Erfindungsgemäß wird zur Lösung der Aufgabe ferner ein Verfahren zum Ein- und Ausschalen von Säulen, Stützen und ähnlichen Bauelementen vorgeschlagen, bei dem zum Einschalen ein erfindungsgemäßes Schalrohr verwendet wird und bei dem zum Ausschalen die Pappschicht mit dem Aufreißstreifen aufgerissen wird, der wärmeabgebende Teil eines Heizgerätes in den entstandenen Spalt in der Pappschicht eingeführt und die Kunststoffschicht erwärmt wird, die erwärmte weiche Kunststoffschicht mit einem stumpfen Gegenstand aufgetrennt und dann das Schalrohr vom Bauelement abgenommen wird.According to the invention, a method is also used to achieve the object for striking and stripping columns, supports and similar Components proposed in the formwork Formwork tube according to the invention is used and in the Strip the cardboard layer open with the tear strip is the heat-emitting part of a heater in the created gap in the cardboard layer and the Plastic layer is heated, the heated soft plastic layer with a blunt object and then the formwork tube is removed from the component.

Durch die erfindungsgemäßen Maßnahmen werden Betonoberflächen erzielt, die keinerlei unerwünschte Abdrücke enthalten und auch keine Kratzspuren oder ähnliche Beschädigungen aufweisen, die beim Ausschalen entstehen können. Mit dem an der Innenwandung der Pappschicht angebrachten Aufreißstreifen kann die Pappschicht beim Ausschalen problemlos aufgerissen werden, wobei mit dem Herausreißen des Aufreißstreifens aus der Pappschicht ein entsprechender Pappstreifen herausgerissen wird. Dabei trennt sich der Aufreißstreifen bei entsprechend gewähltem Material ohne weiteres von der thermoplastischen Kunststoffschicht. Da der Aufreißstreifen in seiner Breitenrichtung seine Ausgangsform im wesentlichen beibehält und seine Breite geeignet gewählt ist, kann in den Spalt, den Aufreißstreifen und der von diesem herausgerissene Pappstreifen hinterlassen, ein Heizelement eingeführt werden, mit dem die Kunststoffschicht, die das fertiggestellte Betonelement noch umschließt und die erfindungsgemäß aus einem thermoplastischen Material gebildet ist, erwärmt wird. Aufgrund der Erwärmung erweicht der thermoplastische Kunststoff. Er kann so mit einem stumpfen Gegenstand aufgetrennt werden, ohne daß in der Betonoberfläche irgendwelche Kratzer oder Riefen entstehen.The measures according to the invention make concrete surfaces achieved that contain no unwanted prints and also have no scratch marks or similar damage, that can arise when stripping. With that on the Tear strips attached to the inner wall of the cardboard layer the cardboard layer can easily be torn open when stripping be, with the tearing of the tear strip from a corresponding cardboard strip is torn out of the cardboard layer becomes. The tear strip separates accordingly selected material easily from the thermoplastic Plastic layer. Since the tear strip in his Width direction essentially maintains its initial shape and its width is suitably chosen, can be in the gap Tear strip and the cardboard strip torn from it leave a heating element with which the plastic layer that the finished concrete element still encloses and according to the invention from a thermoplastic Material is formed, is heated. Due to the Warming softens the thermoplastic. He can be separated with a blunt object without Any scratches or streaks appear in the concrete surface.

Vorzugsweise ist der Aufreißstreifen ein Kunststoffband. Hierdurch werden die Herstellungskosten eines erfindungsgemäßen Schalrohrs möglichst gering gehalten. The tear strip is preferably a plastic tape. As a result, the manufacturing costs of an inventive Formwork tube kept as low as possible.

Der Aufreißstreifen kann an seinen Längsrändern jeweils einen durchlaufenden Draht aufweisen. Aufgrund der Schneidwirkung der beiden parallelen Drähte kann mit einem derart ausgebildeten Aufreißstreifen die Pappschicht leichter aufgerissen bzw. aus dieser leichter ein Pappstreifen herausgerissen werden.The tear strip can have one on its longitudinal edges have continuous wire. Because of the cutting effect of the two parallel wires can be formed with one Tear strips the cardboard layer more easily torn open or a cardboard strip is more easily torn out of this.

In vorteilhafter Weiterbildung der Erfindung ist der Aufreißstreifen ein Klebestreifen. Der Aufreißstreifen kann dann auf die Innenwand der Pappschicht aufgeklebt werden, wodurch sich der Herstellungsaufwand verringert.In an advantageous development of the invention, the tear strip an adhesive tape. The tear strip can then be opened the inner wall of the cardboard layer will be glued, causing the manufacturing cost is reduced.

In einer bevorzugten Ausführungsform der Erfindung ragt der Aufreißstreifen zumindest aus einem Rohrende nach außen heraus, um einen Abschnitt zum Ergreifen herauszubilden. Ein schnelles Aufreißen der Pappschicht wird auf diese Weise gewährleistet.In a preferred embodiment of the invention, the Tear strips at least from one pipe end to the outside out to form a gripping section. On This ensures that the cardboard layer is torn open quickly.

Vorzugsweise beträgt die Breite des Aufreißstreifens mindestens 10 mm. Damit wird in vielen Fällen bereits ein ausreichend großer Spalt zum Hindurchführen des wärmeabgebenden Teils eines Heizgerätes geschaffen.The width of the tear strip is preferably at least 10 mm. In many cases this is sufficient large gap for the passage of the heat emitting Part of a heater created.

In vorteilhafter Ausbildung der Erfindung ist der Thermoplast Polyurethan. Mit Polyurethan wird nicht nur eine glatte Betonoberfläche erzeugt, sondern es weist auch einen relativ niedrigen Erweichungspunkt auf und ist problemlos entsorgbar, da es beispielsweise wie Papier verbrannt werden kann.In an advantageous embodiment of the invention, the thermoplastic Polyurethane. Polyurethane doesn't just make a smooth concrete surface generated, but it also exhibits a relative low softening point and is easy to dispose of, because it can be burned like paper, for example.

Zum Erweichen des Thermoplasts, insbesondere von Polyurethan, kann vorteilhafterweise eine Lötlampe verwendet werden. Hierdurch wird der technische Aufwand beim Ausschalen gering gehalten.To soften the thermoplastic, especially polyurethane, a blowtorch can advantageously be used. hereby the technical effort for stripping is kept low.

Zum Auftrennen des erweichten Thermoplasts wird vorzugsweise ein Messerrücken verwendet, um Schnitt- und Kratzspuren sicher zu vermeiden. For separating the softened thermoplastic is preferred a knife back is used to safely cut and scratch marks to avoid.

Die Erfindung wird nachfolgend anhand der Zeichnung beispielshalber noch näher erläutert. Es zeigen:

Figur 1
eine Endansicht eines erfindungsgemäßen Schalrohrs;
Figur 2
eine vergrößerte Ansicht des Details I aus Figur 1 und
Figur 3
eine der Figur 2 ähnliche Ansicht im aufgerissenen Zustand der Pappschicht.
The invention is explained in more detail below by way of example with reference to the drawing. Show it:
Figure 1
an end view of a formwork tube according to the invention;
Figure 2
an enlarged view of detail I of Figure 1 and
Figure 3
a view similar to Figure 2 in the torn condition of the cardboard layer.

Das in den Figuren dargestellte Ausführungsbeispiel eines erfindungsgemäßen Schalrohrs 1 weist eine zylindrische Rohrwand 2 auf, die aus einer radial äußeren Schicht 3 aus Papier bzw. Pappe und einer radial inneren Kunststoffschicht 4 gebildet ist.The embodiment shown in the figures of a Formwork tube 1 according to the invention has a cylindrical tube wall 2, which consists of a radially outer layer 3 of paper or cardboard and a radially inner plastic layer 4 is formed is.

Die radial außen liegende Pappschicht 3 ist aus einer Anzahl neben- und übereinander liegenden Papierstreifen spiralförmig gewickelt und bildet eine Innenwandung 5 mit einem vorgegebenen Durchmesser aus. Die Innendurchmesser liegen vorzugsweise im Bereich zwischen 250 mm und 800 mm. In der Innenwandung 5 verlaufen spiralförmig Stoßnähte zwischen den nebeneinander liegenden Papierstreifen. Die spiralgewickelten Papierstreifen sind untereinander verklebt. Die Anzahl der übereinander liegenden Papierlagen ist den jeweiligen Erfordernissen angepaßt, um eine ausreichende Festigkeit und Steifigkeit der Pappschicht zu erreichen.The radially outer cardboard layer 3 is made up of a number paper strips lying next to and on top of each other in a spiral wound and forms an inner wall 5 with a predetermined Diameter. The inside diameter is preferably in the range between 250 mm and 800 mm. In the inner wall 5 run butt joints between the side by side lying paper strips. The spiral wound paper strips are glued together. The number of one above the other lying paper layers is adapted to the respective requirements, to have sufficient strength and rigidity To reach cardboard layer.

Auf die Innenwandung 5 der Pappschicht 3 ist in Längsrichtung des Schalrohrs 1 ein Aufreißstreifen 6 aufgebracht, der im dargestellten Beispiel ein etwa 18 mm breites Kunststoffband ist, z.B. ein 3M-Scotch-Kunststoffband. Das Kunststoffband 6 ist einseitig mit einem Klebemittel beschichtet und auf die Innenwandung 5 der Pappschicht 3 aufgeklebt. Das Kunststoffband 6 erstreckt sich über die gesamte Länge des Schalrohrs 1 und ragt an einem Rohrende nach außen um eine vorgegebene Länge aus dem Rohr heraus. Die herausragende Länge des Kunststoffbandes 6 ist ausreichend lang, um ein bequemes Erfassen des Kunststoffbandes 6 zu gewährleisten, und an der Außenseite der Pappschicht 3 angeklebt. Beispielsweise kann die herausragende Länge 0,5 m betragen.On the inner wall 5 of the cardboard layer 3 is in the longitudinal direction of the formwork tube 1 applied a tear strip 6, which in example shown an approximately 18 mm wide plastic tape is, e.g. a 3M Scotch plastic tape. The plastic band 6 is coated on one side with an adhesive and on the Glued inner wall 5 of the cardboard layer 3. The plastic band 6 extends over the entire length of the formwork tube 1 and protrudes outwards at a pipe end by a predetermined one Length out of the pipe. The outstanding length of the plastic strap 6 is long enough for easy grasping to ensure the plastic band 6, and on the outside the cardboard layer 3 glued. For example, the outstanding Length be 0.5 m.

Auf die Innenwandung 5 der Pappschicht 3 ist eine Polyurethanschicht 4 durch Schleuderguß aufgebracht, so daß die Polyurethanschicht 4 keinerlei Nähte oder andere unerwünschte Erhebungen oder Vertiefungen aufweist, die sich auf der Oberfläche des zu betonierenden Bauteils abbilden würden. Die Dicke der Polyurethanschicht 4 ist so gewählt, daß die Spiralnähte in der Innenwandung 5 der Pappschicht 3 überbrückt werden und das Kunststoffband 6 vollständig eingebettet und überdeckt ist, so daß sich weder die Spiralnähte noch das Kunststoffband 6 noch die Faserstruktur der Pappschicht 3 in der Oberfläche des Betonteils abbilden können. Das Material des Kunststoffbandes 6 ist auf die Polyurethanschicht 4 in der Weise abgestimmt, daß es sich nicht mit dieser fest verbindet, sondern von dieser leicht trennbar ist. An der radial innen liegenden Wandung 7 der thermoplastischen Kunststoffschicht 4 können noch zusätzliche (nicht dargestellte) Schalelemente angebracht werden, um Höhlungen im Beton, beispielsweise für Steckdosen, auszubilden.A polyurethane layer is on the inner wall 5 of the cardboard layer 3 4 applied by centrifugal casting, so that the polyurethane layer 4 no seams or other unwanted Has elevations or depressions that are on the surface of the component to be concreted. The The thickness of the polyurethane layer 4 is chosen so that the spiral seams bridged in the inner wall 5 of the cardboard layer 3 are and the plastic tape 6 fully embedded and is covered so that neither the spiral seams nor the Plastic tape 6 still the fiber structure of the cardboard layer 3 in map the surface of the concrete part. The material of the plastic band 6 is on the polyurethane layer 4 in the way that it is not fixed with this connects, but is easily separable from it. At the radially inner wall 7 of the thermoplastic layer 4 can also additional (not shown) Formwork elements are attached to cavities in the concrete, for example for sockets to train.

Zum Ausschalen des betonierten Bauteils wird das aus dem Ende des Schalrohrs 1 herausragende Teil des Kunststoffbandes 6 ergriffen und das Kunststoffband 6 in radialer Richtung aus dem Schalrohr 1 herausgerissen. Mit dem Herausreißen des Kunststoffbandes 6 wird der Teil der Pappschicht 3, an dem das Kunststoffband 6 angeklebt ist, in Form eines Streifens mit herausgerissen. Der radial innen liegende Teil der Polyurethanschicht 4, der das Kunststoffband 6 überdeckt hat, liegt weiter am Betonteil an, so daß dieses noch von der Kunststoffschicht 4 umschlossen ist.For stripping the concrete component, this becomes the end of the formwork tube 1 projecting part of the plastic band 6 seized and the plastic band 6 in the radial direction torn out the formwork tube 1. With the tearing out of the Plastic tape 6 becomes the part of the cardboard layer 3 on which the plastic tape 6 is glued in the form of a strip with ripped out. The radially inner part of the polyurethane layer 4, which has covered the plastic band 6, lies further on the concrete part, so that this still from the Plastic layer 4 is enclosed.

Durch den in Folge des Herausreißens des Kunststoffbandes 6 entstandenen Spalt 8 in der Pappschicht 3 kann ein (nicht dargestelltes) Heizelement, beispielsweise eine Lötlampe, hindurchgeführt werden, bis es an der Kunststoffschicht 4 anliegt oder zumindest in deren Nähe ist. Die Kunststoffschicht 4 wird nun längs des Spaltes 8 erwärmt und erweicht aufgrund ihrer thermoplastischen Eigenschaften. Die erwärmte weiche Kunststoffschicht 4 wird nun mit einem stumpfen Gegenstand, z.B. einem Messerrücken oder einer stumpfen Messerschneide, längs der gesamte Länge des Schalrohrs 1 aufgetrennt. Das aufgetrennte Schalrohr 1 wird anschließend von dem Betonbauteil abgenommen.Due to the tearing out of the plastic band 6 Gap 8 formed in the cardboard layer 3 can (not shown) heating element, for example a blowtorch, be passed through until it rests on the plastic layer 4 or at least in the vicinity. The plastic layer 4 is now heated along the gap 8 and softens due to their thermoplastic properties. The warmed soft Plastic layer 4 is now covered with a blunt object, e.g. a knife back or a blunt knife edge, cut along the entire length of the formwork tube 1. The separated formwork tube 1 is then from the concrete component decreased.

Claims (10)

Schalrohr zum Betonieren von Säulen, Stützen und ähnlichen Bauteilen, mit einer zweischichtigen Rohrwand, deren äußere Schicht aus Pappe hergestellt ist und deren innere Schicht nahtlos und verformungssteif aus Kunststoff gebildet und mit der äußeren Schicht fest verbunden ist,
dadurch gekennzeichnet, daß auf der Innenwandung (5) der Pappschicht (3) ein in Rohrlängsrichtung über die gesamte Rohrlänge verlaufender Aufreißstreifen (6) angebracht ist, mit dem die Pappschicht (3) aufreißbar ist, daß der Kunststoff ein Thermoplast ist und die Kunststoffschicht (4) den Aufreißstreifen (6) vollständig überdeckt, wobei das Material des Aufreißstreifens (6) so gewählt ist, daß dieser von der Kunststoffschicht (4) lösbar ist und daß der Aufreißstreifen (6) in seiner Breitenrichtung verformungssteif ist und seine Breite so gewählt ist, daß durch den beim Aufreißen in der Pappschicht (3) entstehenden Spalt (8) der wärmeabgebende Teil einer Heizeinrichtung führbar ist. Formwork pipe for concreting columns, supports and similar components, with a two-layer pipe wall, the outer layer of which is made of cardboard and the inner layer of which is seamlessly and rigidly formed from plastic and firmly connected to the outer layer,
characterized in that on the inner wall (5) of the cardboard layer (3) is attached a tear strip (6) running in the longitudinal direction of the tube over the entire length of the tube, with which the cardboard layer (3) can be torn open, that the plastic is a thermoplastic and the plastic layer (4) completely covers the tear strip (6), the material of the tear strip (6) being selected so that it can be detached from the plastic layer (4) and that the tear strip (6) is rigid in its width direction and its width is selected so that the heat-emitting part of a heating device can be guided through the gap (8) which arises when the cardboard layer (3) is torn open. Schalrohr nach Anspruch 1, dadurch gekennzeichnet, daß der Aufreißstreifen ein Kunststoffband (6) ist.Formwork tube according to claim 1, characterized in that the Tear strip is a plastic tape (6). Schalrohr nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Aufreißstreifen (6) an seinen Längsrändern jeweils einen durchlaufenden Draht aufweist.Formwork tube according to claim 1 or 2, characterized in that the tear strip (6) has one at each of its longitudinal edges has continuous wire. Schalrohr nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Aufreißstreifen (6) ein Klebestreifen ist. Formwork tube according to one of claims 1 to 3, characterized in that that the tear strip (6) is an adhesive strip. Schalrohr nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Aufreißstreifen (6) aus zumindest einem Rohrende nach außen herausragt, um einen Abschnitt zum Ergreifen auszubilden.Formwork tube according to one of claims 1 to 4, characterized in that that the tear strip (6) from at least one Pipe end protrudes outwards to a section to the Train grasp. Schalrohr nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Breite des Aufreißstreifens (6) mindestens 10 mm beträgt.Formwork tube according to one of claims 1 to 5, characterized in that that the width of the tear strip (6) at least Is 10 mm. Schalrohr nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Thermoplast Polyurethan ist.Formwork tube according to one of claims 1 to 6, characterized in that that the thermoplastic is polyurethane. Verfahren zum Ein- und Ausschalen von Säulen, Stützen und ähnlichen Bauteilen, mit dem
Verwenden eines Schalrohrs (1) nach einem der Ansprüche 1 bis 7 zum Einschalen
und mit den folgenden Schritten beim Ausschalen: Aufreißen der Pappschicht (3) mit dem Aufreißstreifen (6); Einführen des wärmeabgebenden Teils einer Heizeinrichtung in den entstandenen Spalt (8) in der Pappschicht (3) und Erwärmen der Kunststoffschicht (4); Auftrennen der erwärmten weichen Kunststoffschicht (4) mit einem stumpfen Gegenstand und Abnehmen des Schalrohrs (1) vom Bauelement. Process for striking and stripping columns, supports and similar components, with the
Use of a formwork tube (1) according to one of claims 1 to 7 for formwork
and with the following steps when stripping: Tear open the cardboard layer (3) with the tear strip (6); Inserting the heat-emitting part of a heating device into the resulting gap (8) in the cardboard layer (3) and heating the plastic layer (4); Separate the heated soft plastic layer (4) with a blunt object and Remove the formwork tube (1) from the component. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß als Heizeinrichtung eine Lötlampe verwendet wird.A method according to claim 8, characterized in that as Heating device a blowtorch is used. Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß als stumpfer Gegenstand ein Messerrücken verwendet wird.A method according to claim 8 or 9, characterized in that a knife back is used as a blunt object.
EP99125030A 1999-12-15 1999-12-15 Tubular formwork and method for placing and stripping it Expired - Lifetime EP1108830B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
ES99125030T ES2167985T3 (en) 1999-12-15 1999-12-15 PIPING AND PROCEDURE TUBE TO BUILD AND UNCOVER CONSTRUCTION ELEMENTS.
DE59900655T DE59900655D1 (en) 1999-12-15 1999-12-15 Formwork tube and method for stripping and stripping components
AT99125030T ATE208851T1 (en) 1999-12-15 1999-12-15 FORMWORK TUBE AND METHOD FOR FORMWORKING AND REMOVAL OF COMPONENTS
EP99125030A EP1108830B1 (en) 1999-12-15 1999-12-15 Tubular formwork and method for placing and stripping it
US09/651,868 US6467749B1 (en) 1999-12-15 2000-08-31 Concrete column forming tube having a tear strip therein
CA002326014A CA2326014C (en) 1999-12-15 2000-11-15 Concrete column forming tube having a tear strip therein
PL00344515A PL344515A1 (en) 1999-12-15 2000-12-13 Tube for in-situ casting a concrete column
NO20006368A NO316030B1 (en) 1999-12-15 2000-12-14 Tubular mold for molding concrete columns and similar structural elements, as well as method for removing mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99125030A EP1108830B1 (en) 1999-12-15 1999-12-15 Tubular formwork and method for placing and stripping it

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Publication Number Publication Date
EP1108830A1 true EP1108830A1 (en) 2001-06-20
EP1108830B1 EP1108830B1 (en) 2001-11-14

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ID=8239623

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EP99125030A Expired - Lifetime EP1108830B1 (en) 1999-12-15 1999-12-15 Tubular formwork and method for placing and stripping it

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US (1) US6467749B1 (en)
EP (1) EP1108830B1 (en)
AT (1) ATE208851T1 (en)
CA (1) CA2326014C (en)
DE (1) DE59900655D1 (en)
ES (1) ES2167985T3 (en)
NO (1) NO316030B1 (en)
PL (1) PL344515A1 (en)

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Also Published As

Publication number Publication date
CA2326014A1 (en) 2001-06-15
NO20006368D0 (en) 2000-12-14
PL344515A1 (en) 2001-06-18
US6467749B1 (en) 2002-10-22
DE59900655D1 (en) 2002-02-21
ES2167985T3 (en) 2002-05-16
NO316030B1 (en) 2003-12-01
CA2326014C (en) 2006-07-25
ATE208851T1 (en) 2001-11-15
NO20006368L (en) 2001-06-18
EP1108830B1 (en) 2001-11-14

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