EP0072506B1 - Corps creux pour conduire des fluides dans le domaine des constructions, en particulier élément de cheminée, ainsi que procédé et dispositif pour sa fabrication - Google Patents

Corps creux pour conduire des fluides dans le domaine des constructions, en particulier élément de cheminée, ainsi que procédé et dispositif pour sa fabrication Download PDF

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Publication number
EP0072506B1
EP0072506B1 EP82107099A EP82107099A EP0072506B1 EP 0072506 B1 EP0072506 B1 EP 0072506B1 EP 82107099 A EP82107099 A EP 82107099A EP 82107099 A EP82107099 A EP 82107099A EP 0072506 B1 EP0072506 B1 EP 0072506B1
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EP
European Patent Office
Prior art keywords
construction unit
hollow construction
layer
binder
layers
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
Application number
EP82107099A
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German (de)
English (en)
Other versions
EP0072506A1 (fr
Inventor
Friedrich Schiedel
Ulrich Wengenroth
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.)
Schiedel GmbH and Co
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Schiedel GmbH and Co
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 Schiedel GmbH and Co filed Critical Schiedel GmbH and Co
Priority to AT82107099T priority Critical patent/ATE30756T1/de
Publication of EP0072506A1 publication Critical patent/EP0072506A1/fr
Application granted granted Critical
Publication of EP0072506B1 publication Critical patent/EP0072506B1/fr
Expired 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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/70—Methods or machines specially adapted for the production of tubular articles by building-up from preformed elements
    • B28B21/72—Producing multilayer tubes
    • 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
    • B28B21/22—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts
    • B28B21/24—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts using compacting heads, rollers, or the like
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F17/00—Vertical ducts; Channels, e.g. for drainage
    • E04F17/02—Vertical ducts; Channels, e.g. for drainage for carrying away waste gases, e.g. flue gases; Building elements specially designed therefor, e.g. shaped bricks or sets thereof
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts

Definitions

  • the invention relates, according to the preamble of claim 1, to a hollow part for fluid conduction for the construction sector, in particular a chimney component, which consists of at least one heat-resistant first layer surrounding the hollow part of the hollow part with a mixture of inorganic porous particles and binders, which are attached to a second Layer is pressed under compression.
  • Such a hollow part for the construction sector, in particular for building services, is suitable as a chimney component, for example as a ventilation duct component, component for warm air ducts, sewage pipe part and the like.
  • the at least partially porous structure results in a comparatively light component with the associated advantages in terms of transport, handling and lower, required strength of suspension or support parts, and results in an insulating hollow part, the insulation effect being, for example, soundproofing and / or in particular can relate to thermal insulation or insulation.
  • the heat resistance of the layer results, as will become clearer below, from the material used and does not necessarily have to be necessary for the purpose of the hollow part, as the example of the ventilation duct component shows.
  • a first layer of pearlite, binder and water is pressed with a prefabricated inner tube by the action of pressure.
  • the binder can also be water glass, in particular potassium water glass.
  • the invention has for its object to improve the producibility of hollow parts of the type mentioned and to create layers of different properties that can be created in a common manufacturing process.
  • the hollow part according to the invention is characterized by the features of the characterizing part of claim 1.
  • the hollow part is multilayered, it being possible for several or even all of the layers to be constructed in accordance with the invention, but also one or more layers not for the invention to be present.
  • the hollow part can otherwise also have a plurality of layers of the same structure, for example two layers which are basically the same and which have been produced simultaneously or in succession only for reasons of the more favorable pressing process.
  • the mixture does not have to consist exclusively of inorganic, porous particles and a heat-resistant. consist of non-cementitious binders, but can have other constituents, for example non-porous particles.
  • the particles are preferably impregnated in a binder-repellent manner in order to save on binder. Suitable impregnating agents are commercially available, for example silicone-containing impregnating agents or iron / III-tri-stearate.
  • binders which harden without the action of heat are preferred, an acceleration of the hardening under the action of heat is also possible within the scope of the invention.
  • Expanded vermiculite, expanded pearlite, expanded shale or expanded clay may be mentioned as particularly preferred particle materials, and combinations of these materials with one another or with other materials are also possible.
  • Expandable slate or the like, individually or in combination, is known per se as a pourable material with a bulk density below 1,000 kg / m 3 (AT-B-328 693). It is also known to use heat-resistant and / or heat-insulating materials, e.g. B. thicker (blocks) or thinner (foils) plates or sheets or as molded parts, from a mixture of perlite and sodium silicate in a pressing process (DE-A-2 240 228).
  • a combination of vermiculite with pearlite is particularly preferred because of the favorable combination of properties that can be achieved.
  • Preferred bulk densities of the particle material before pressing are in the range from 0.1 to 0.4 t / m 3 .
  • Preferred degrees of compaction when pressing the mixture are in the range from 1.2: 11 to 2.5: 1.
  • Preferred binders are silicate binders, preferably Alkali metal silicate binder or aluminum silicate binder. Alkali metal silicate binders are also known as water glass and aluminum silicate binders are also known as ceramic adhesives.
  • the hollow part according to the invention preferably has an elongated configuration.
  • the extension of the hollow part is preferably straight.
  • the outer circumference and / or the inner circumference can be, for example, rectangular, square, rounded or circular, a square outer circumference and a circular inner circumference being preferred in particular in the case of the chimney component.
  • the invention further relates to a method for producing a hollow part according to the invention with the process features of the preamble of claim 8. These process features result from CH-A-470 558, which was already used when forming the preamble of claim 1.
  • the method according to the invention is characterized by the method steps of the characterizing part of claim 8. It enables the production of at least two layers of the hollow part according to the invention. which in particular have different properties in one go and do not require a prefabricated support layer without excluding their presence if necessary.
  • the multiple layers are produced in the manner according to the invention, they are preferably produced either simultaneously or in immediate succession. This creates a good material connection between these layers, since the material flows into one another at the interface as a result of the pressing. The final hardening of the binders of the layers then preferably takes place simultaneously.
  • a very particularly important aspect of the method according to the invention is the pressing of the mixture for the respective layer, which progresses zone by zone along the hollow part, so that only a comparatively small mixture volume, measured in relation to the total volume of the layer, is pressed at any given time.
  • the speed of the zone-wise progress of the compression can be selected within relatively wide limits and determines the degree of compression of the mixture to a certain degree, whereby generally low speeds result in high degrees of compression and vice versa.
  • the speed of the zone-by-zone progression can be constant or determined according to preliminary tests, but can also be regulated depending on the degree of compaction achieved.
  • the method according to the invention is suitable for the continuous production of the hollow components as an axially moving strand which is divided into the individual hollow components, for example by means of separating devices which are moved along with the strand movement.
  • the layer or layers to be produced can be produced without the aid of a supporting formwork or a supporting other layer of the hollow part to be produced, it is preferred that the layer (s) on the inside or outside of a formwork or another, the cavity of the Layer surrounding the hollow part is (are) pressed. If the layer applied according to the invention is applied internally to a formwork or another layer surrounding the cavity of the hollow part, one preferably works without formwork within the layer applied according to the invention. If the layer applied according to the invention is applied to the outside of a formwork or another layer surrounding the cavity of the hollow part, one preferably works without a formwork outside the layer applied according to the invention.
  • the invention further relates to a device for producing an at least two-layer hollow part according to the invention.
  • This device is characterized by the characterizing features of claim 12.
  • the pressing tool can move relative to the stationary formwork or relative to the stationary other layer or layer to be produced, or the formwork or the other layer serving as formwork or the layer to be produced can move relative to the pressing tool which remains stationary in the longitudinal direction.
  • the latter option is particularly suitable for the continuous production described above, but can also be used for batch production.
  • a feed device is provided for continuously feeding the mixture to the area located in front of the pressing tool in the working direction.
  • pressing tools which are about the longitudinal axis of the hollow partly rotate relative to the hollow part, particularly preferred.
  • Such pressing tools are technically particularly easy to implement with a circular, direct area of influence of the pressing tools. You can work with a rotating press tool and non-rotating hollow part and vice versa.
  • Roller heads or skid heads are particularly preferred as pressing tools.
  • the pressing takes place in the tapering roller gap, and in the case of the runner head, the pressing takes place by the relative movement of a runner which has a larger material passage gap at the front than at the rear, or is adjusted appropriately. More detailed explanations of these pressing tools can be found below in the exemplary embodiment.
  • pressing tools which are arranged at essentially the same location with respect to the longitudinal direction of the hollow part or are arranged one behind the other in the longitudinal direction of the hollow part.
  • the latter are preferably movable together in the longitudinal direction.
  • a direct physical connection between the pressing tools is particularly favorable, so that they can be moved in the longitudinal direction by means of a common device.
  • a separate feed device for the material mixture per pressing tool is preferred. This is favorable for the function of the pressing tools and is mandatory for different mixtures per shift.
  • the pressing tool at the front in the working direction is a roller head that can be rotated by means of a first shaft
  • the subsequent pressing tool is a skid head that can be rotated by means of a second shaft that is coaxial with the first shaft
  • the Cavity of one or both shafts serves as a feed device.
  • openings in the wall can also be produced without difficulty, z. B. uses a core at the appropriate point in the manufacture. The area surrounding the core is well compressed by the pressing according to the invention.
  • Fig. 1 you can see an elongated formwork 2, which is open on both faces and rests with a face on a base 4.
  • the formwork 2 consists of steel plates and has a square shape in cross section or in the end view.
  • the central axis 6 of the formwork 2 is straight.
  • a roller head 8 and underneath a skid head 10 hang on a carriage (not shown) that can be moved in the longitudinal direction of the formwork 2.
  • the roller head 8 is supported by a vertical hollow shaft 12 and has four rollers 14 distributed on its outer circumference, one of which is shown in FIG. 1 is recognizable.
  • the rollers 14 are each rotatably supported on a vertical axis 16, the axes 16 each extending between a lower, strong disc 18 and an upper, strong disc 20.
  • the disks 18 and 20 each have a central opening, in the area of which they are fastened to the hollow shaft 12.
  • the disks 18 and 20 have an outer diameter which corresponds to the diameter of an imaginary contact circle which is also placed around the four rollers 14.
  • the lower disk 18 has an axial, cylindrical extension 22 downward on its outer circumference.
  • the runner head 10 is supported by a further vertical hollow shaft 24 which is arranged coaxially in the hollow shaft 12.
  • the runner head 10 essentially has the shape of an upturned bowl which closes the shaft 24 at the bottom, the bowl bottom forming a cone tapering upwards within the shaft 24 and runners 26 distributed on the outside of the cylindrical bowl wall 4 over the circumference of the runner head 10 are.
  • each of the runners 26 has an upwardly curved working surface in the direction of rotation at the front.
  • the cup wall protrudes downward over the runners 26.
  • Both the hollow shaft 12 and the shaft 24 are rotatably supported in the above-mentioned slide, the shaft 24 being additionally supported further down in the hollow shaft 12.
  • Both the hollow shaft 12 and the shaft 24 can be driven in rotation by means of a drive arranged on the slide, for example an electric motor with gear torque transmission to the shafts 12 and 24.
  • the speed of the two shafts 12 and 24 can be the same, but need not be the same.
  • the roller head 8 and the runner head 10 can be raised and lowered by vertical movement of the slide along suitable guides parallel to the formwork 2.
  • the runners 26 project radially outward approximately as far as the outer circumference of the disk 18 or the outer circumference of the extension 22 corresponds.
  • the vertical distance between the runners 26 and the axial center of the rollers 14 is, for example, 15 to 30 cm.
  • the shaft 24 has a plurality of vertical slots 25 distributed around the circumference for the passage of material.
  • the roller head 8 and the runner head 10 are lowered as much as possible. Then the annular space between the hollow shaft 12 and the formwork 2 is distributed substantially uniformly over its circumference, a mixture 28 of expan dated perlite and an aqueous alkali metal silicate solution as a binder.
  • This binder is also known as water glass.
  • a mixture 30 of expanded vermiculite and said binder is fed into the cavity of the hollow shaft 24 from above.
  • the mixture 28 reaches the area between the rollers 14 and the formwork 2 by gravity.
  • the mixture 30 reaches the area of the skids 26 by gravity.
  • Rotation of the roller head 8 creates a wedge effect between the respective roller 14 and 14 in the feed area of each roller 14 the formwork 2, whereby the mixture 28 is pressed into a layer 32 in which the voids between the pearlite particles are largely filled by the binder.
  • new portions of the mixture 30 always get under the bent front end of the skids 26 and are pressed axially downward there to the layer 34, in which the cavities between the vermiculite particles are largely filled by the binder.
  • the pressed layers 32 and 34 grow from bottom to top. It is ensured that the roller head 8 and the runner head 10 are always supplied with sufficient replenishment mixture 28 and 30, respectively.
  • the layers 32 and 34 become dimensionally stable in such a way that the formwork 2 after the layers 32 and 34 have been introduced at the desired height and after moving out the roller head 8 together with the runner head 10 upwards from the formwork 2, the formwork 2 with the layers 32 and 34 can be removed from the device. There the binders of the two layers 32 and 34 harden, which can be accelerated by the action of heat. Finally, the formwork 2 is removed from the hollow part 36 thus formed, which consists of the two layers 32 and 34.
  • FIGS. 2 and 3 show the finished hollow part 36, for example a chimney part. This can be floor-high.
  • a ceramic layer 38 was subsequently applied to the inner layer 34 on the inside.
  • the formwork 2 has a square inner contour and the roller head 8 creates a circular inner contour of the outer layer 32, the compression of the mixture 28 in the corners is less pronounced than between the corners. Nevertheless, the hollow part 36 is sufficiently stable. A non-round outer contour of the hollow part 36 is preferred for reasons of installation.
  • the described method and the described device for producing the chimney component are characterized by great simplicity.
  • the chimney component has outstanding properties, particularly in terms of weight, thermal expansion behavior, insulation and durability, in mechanical and chemical terms.

Claims (19)

1. Gaine creuse (36) pour le passage de fluides dans le domaine du bâtiment, en particulier composant de cheminée, qui est constituée au moins d'une première couche, résistant à la chaleur, qui entoure l'intérieur du corps creux, en un mélange de particules poreuses inorganiques et d'un liant, laquelle est comprimée, avec compactage, contre une deuxième couche (32), caractérisée en ce que la deuxième couche extérieure (32), et éventuellement au moins une autre couche, sont elles aussi constituées d'un mélange de particules poreuses inorganiques et d'un liant ; que plusieurs couches de ce genre (32, 34) se distinguent les unes des autres pour ce qui est du degré de compaction lors du pressage et/ou du matériau des particules et/ou de la grosseur des particules ; que le liant utilisé dans chaque cas n'est pas du type ciment ; et que les couches (32, 34) sont comprimées les unes dans les autres par fluage, encore à l'état non durci, pour donner la gaine creuse indéformable (36).
2. Gaine creuse selon la revendication 1, caractérisée en ce que les particules sont imprégnées de façon à repousser le liant.
3. Gaine creuse selon la revendication 1 ou 2, caractérisée en ce qu'on utilise des particules de vermiculite expansée, de perlite expansée, d'ardoise expansée ou de schiste expansé.
4. Gaine creuse selon l'une des revendications 1 à 3, caractérisée en ce que les particules, avant le pressage, ont une masse volumique apparente de 0,1 à 0,4 t/m 3.
5. Gaine creuse selon l'une des revendications 1 à 4, caractérisée en ce qu'on utilise un liant silicaté.
6. Gaine creuse selon la revendication 5, caractérisée en ce qu'il est prévu un liant à base d'un silicate de métal alcalin ou un liant à base de silicate d'aluminium.
7. Gaine creuse selon l'une des revendications 1 à 6, caractérisée en ce que le mélange est pressé avec un taux de compaction de 1.2 : 1 à 2,5:1.
8. Procédé pour la fabrication d'une gaine creuse selon l'une des revendications 1 à 7, dans lequel on presse par compactage, contre une deuxième couche (32). une première couche (34), résistant à la chaleur, qui entoure l'intérieur de la gaine creuse, en un mélange de particules inorganiques poreuses et d'un liant résistant à la chaleur, caractérisé en ce que, tout en utilisant dans chaque cas des liants qui ne sont pas du type ciment, on réalise aussi la deuxième couche (32) et éventuellement au moins une autre couche, chacune en un mélange de particules inorganiques poreuses et d'un liant résistant à la chaleur, et qu'on comprime d'une manière progressive les couches (32, 34) les unes aux autres, par zones le long de la gaine creuse à fabriquer, de façon que les couches (32, 34) pénètrent les unes dans les autres, à l'état encore non durci, au niveau de leurs surfaces de délimitation, et deviennent indéformables après durcissement.
9. Procédé selon la revendication 8, caractérisé en ce que les couches (32, 34) sont réalisées immédiatement les unes après les autres, avant d'être comprimées les unes avec les autres.
10. Procédé selon la revendication 8 ou 9, caractérisé en ce que les couches (32, 34) sont comprimées les unes aux autres en continu sous la forme d'un boyau pouvant subir un déplacement axial, les gaines creuses étant subdivisées par ce boyau.
11. Procédé selon l'une des revendications 8 à 10, caractérisé en ce que les couches (32, 34) sont, à l'intérieur ou à l'extérieur, pressées contre un coffrage ou contre une autre couche qui entoure l'intérieur de la gaine creuse.
12. Equipement pour la réalisation d'une gaine creuse, au moins à deux couches, selon l'une des revendications 1 à 7, caractérisé par un outil de pressage (8 ; 10) pouvant se déplacer dans le sens longitudinal par rapport à un coffrage extérieur (2) ou par rapport à la couche à réaliser ou aux couches à réaliser (32, 34), qui, dans chaque position, n'agit que sur un tronçon longitudinal court par rapport à l'étendue longitudinale totale de la gaine creuse (36).
13. Equipement selon la revendication 12, caractérisé par un dispositif d'alimentation destiné à amener en continu le mélange à la zone se trouvant, dans le sens du travail, en amont de l'outil de pressage (8 ; 10).
14. Equipement selon la revendication 12 ou 13, caractérisé en ce que l'outil de pressage (8 ; 10) tourne autour de l'axe longitudinal de la gaine creuse (36) par rapport à la gaine creuse (36).
15. Equipement selon l'une des revendications 12 à 14, caractérisé en ce que l'outil de pressage est une tête à rouleaux (8) ou une tête à godets (10).
16. Equipement selon l'une des revendications 12 à 15, caractérisé par au moins deux outils de pressage (8, 10) disposés l'un derrière l'autre dans le sens longitudinal, dont chacun est mobile dans le sens longitudinal.
17. Equipement selon la revendication 16, caractérisé en ce que les outils de pressage (8, 10) peuvent se déplacer ensemble.
18. Equipement selon la revendication 16 ou 17, caractérisé en ce qu'il est prévu pour chaque outil de pressage (8 ; 10) un dispositif propre d'alimentation pour le mélange correspondant.
19. Equipement selon l'une des revendications 16 à 18, caractérisé en ce que l'outil de pressage qui, dans le sens du travail, est situé à l'avant, est une tête à rouleaux (8) pouvant tourner à l'aide d'un premier arbre (12) ; que l'outil de pressage venant immédiatement ensuite est une tête à godets (10), pouvant tourner à l'aide d'un deuxième arbre (24) coaxial au premier arbre ; et que le creux situé à l'intérieur de l'un ou des deux arbres (12 ; 24) sert de dispositif d'alimentation.
EP82107099A 1981-08-07 1982-08-05 Corps creux pour conduire des fluides dans le domaine des constructions, en particulier élément de cheminée, ainsi que procédé et dispositif pour sa fabrication Expired EP0072506B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82107099T ATE30756T1 (de) 1981-08-07 1982-08-05 Hohlteil zur fluidleitung fuer den baubereich, insbesondere schornsteinbauteil, sowie verfahren und vorrichtung zu dessen herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3131313 1981-08-07
DE19813131313 DE3131313A1 (de) 1981-08-07 1981-08-07 "hohlteil zur fluidleitung fuer den baubereich, insbesondere schornsteinbauteil, sowie verfahren und vorrichtung zu dessen herstellung"

Publications (2)

Publication Number Publication Date
EP0072506A1 EP0072506A1 (fr) 1983-02-23
EP0072506B1 true EP0072506B1 (fr) 1987-11-11

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EP82107099A Expired EP0072506B1 (fr) 1981-08-07 1982-08-05 Corps creux pour conduire des fluides dans le domaine des constructions, en particulier élément de cheminée, ainsi que procédé et dispositif pour sa fabrication

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EP (1) EP0072506B1 (fr)
AT (1) ATE30756T1 (fr)
DE (2) DE3131313A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK111184A (da) * 1983-03-29 1984-09-30 Plein Wagner Soehne Praefabrikeret skorstensforingselement af charmotte, beton ell. lign.
EP0385980B1 (fr) * 1987-02-02 1993-03-03 NOVOTNY, Jan Procede et appareil servant a construire des murs de terre dames avec enduit solidaire
DE19960252A1 (de) * 1999-12-14 2001-06-21 Saint Gobain Isover G & H Ag Fertigelement aus Mantelstein und innerer Dämmschale sowie Herstellungsverfahren
CN103600413B (zh) * 2013-09-02 2016-01-20 桐乡市高桥巨峰装饰材料有限公司 烟道打浆平台

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DE2240228A1 (de) * 1971-08-17 1973-02-22 Dexion Comino Int Ltd Verfahren und einrichtung zur herstellung von hitzebestaendigem und/oder waermedaemmendem material
DE2940188B1 (de) * 1979-10-04 1981-02-19 Kramer Gmbh & Co Kg Hans Verfahren zur Innenauskleidung von hohlen Formstuecken,insbesondere fuer Schornsteine o.dgl.,mit einer Waermedaemmschicht

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US3276091A (en) * 1964-04-20 1966-10-04 Charles B Pausch Roller head for cement pipe forming
CH470558A (de) * 1966-05-20 1969-03-31 Rawitzer Alois Verfahren zum Herstellen von Formstücken für ein- oder mehrzügige Innenrohrkamine und nach dem Verfahren hergestelltes Formstück
DE1659703C3 (de) * 1967-07-20 1973-10-04 Didier-Werke Ag, 6200 Wiesbaden Verfahren zum Herstellen eines Formsteins, insbesondere zum Errichten von Schornsteinen in Gebäuden, und mit dem Verfahren hergestellter Formstein
US3776677A (en) * 1970-12-24 1973-12-04 Monier Res & Dev Pty Ltd Pipe making machine
AT328693B (de) * 1973-12-11 1976-04-12 Wienerberger Baustoffind Ag Kamin, sowie verfahren zu dessen herstellung
ATE999T1 (de) * 1979-03-08 1982-05-15 Georg Fischer Aktiengesellschaft Einrichtung zum schleuderpressen eines betonrohres mit unten liegender muffe.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2240228A1 (de) * 1971-08-17 1973-02-22 Dexion Comino Int Ltd Verfahren und einrichtung zur herstellung von hitzebestaendigem und/oder waermedaemmendem material
DE2940188B1 (de) * 1979-10-04 1981-02-19 Kramer Gmbh & Co Kg Hans Verfahren zur Innenauskleidung von hohlen Formstuecken,insbesondere fuer Schornsteine o.dgl.,mit einer Waermedaemmschicht

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Publication number Publication date
EP0072506A1 (fr) 1983-02-23
ATE30756T1 (de) 1987-11-15
DE3131313A1 (de) 1983-03-03
DE3277632D1 (en) 1987-12-17

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