EP0072506A1 - Hollow construction unit for fluids in the building field, particularly a chimney construction unit, as well as a method of and a device for manufacturing the same - Google Patents

Hollow construction unit for fluids in the building field, particularly a chimney construction unit, as well as a method of and a device for manufacturing the same Download PDF

Info

Publication number
EP0072506A1
EP0072506A1 EP82107099A EP82107099A EP0072506A1 EP 0072506 A1 EP0072506 A1 EP 0072506A1 EP 82107099 A EP82107099 A EP 82107099A EP 82107099 A EP82107099 A EP 82107099A EP 0072506 A1 EP0072506 A1 EP 0072506A1
Authority
EP
European Patent Office
Prior art keywords
hollow part
layer
hollow
layers
binder
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
EP82107099A
Other languages
German (de)
French (fr)
Other versions
EP0072506B1 (en
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
Original Assignee
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/en
Publication of EP0072506A1 publication Critical patent/EP0072506A1/en
Application granted granted Critical
Publication of EP0072506B1 publication Critical patent/EP0072506B1/en
Expired legal-status Critical Current

Links

Images

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 to a hollow part for fluid conduction for the building sector, in particular a chimney component, which has at least one porous and heat-resistant layer surrounding the hollow part of the hollow part.
  • the hollow part according to the invention for the construction sector, in particular for domestic engineering, is suitable, in addition to a chimney component, for example as a ventilation duct component, component for warm air ducts, a sewage line part and the like.
  • a chimney component for example as a ventilation duct component, component for warm air ducts, a sewage line 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 thermal insulation or heat 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.
  • An example of a known, generic hollow part is a three-layer chimney component with a heat-resistant inner layer and a middle, porous insulating layer, for example made of ceramic fiber material. So far at h, the insulating layer usually introduced subsequently, which is labor-consuming.
  • the invention has for its object to improve the producibility of hollow parts of the type mentioned.
  • the hollow part according to the invention is characterized in that the layer is built up with a mixture of inorganic, porous particles that is / pressed in the manufacture with a heat-resistant, non-cementitious binder.
  • the layer Since the layer is brought into a dimensionally stable state during manufacture, it does not have to be introduced between two existing layers and does not necessarily have to be supported by another layer.
  • the hollow part can be single-layer, that is to say it can only consist of the layer according to claim 1.
  • the hollow part is preferably multi-layered, it being possible for several or even all layers to be constructed in accordance with the invention, but also one or more layers not in accordance with the invention may be present.
  • the individual layers can differ, in particular in terms of density and / or strength and / or insulation properties and / or acid resistance and / or thermal expansion properties and / or diffusion density. This applies in particular to several layers of the type according to the invention; there may also be differences in the degree of compaction in the pressing and / or material of the particles and / or particle size.
  • the hollow part can also have several layers of the same structure have, for example, two fundamentally identical layers according to the invention 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 / a heat-resistant, non-cementitious binder, but can have further constituents, for example non-porous particles, additives and the like.
  • the particles preferably impregnated binder-resistant to save on binder.
  • Suitable impregnating agents are commercially available, for example silicone-containing impregnating agents or iron / III tri-stearate.
  • binders are preferred which harden without the action of heat, 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.
  • 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: 1 to 2.5: 1.
  • Preferred binders are silicate binders, preferably alkali metal silicate binders or aluminum silicate binders. 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 for fluid conduction for the construction area, in particular a chimney part, which has at least one porous and heat-resistant layer surrounding the hollow part of the hollow part.
  • this process is characterized in that an inorganic, porous particle and a heat-resistant, non-cementitious binder mixture is pressed zone by zone along the hollow part to be produced to an immediately dimensionally stable layer.
  • the method according to the invention is preferably used to produce hollow parts of the type described in more detail above. Several layers of a hollow part can also be produced by the method described above.
  • the invention further relates to a method for producing a hollow part for fluid conduction for the construction area, in particular a chimney component, which has at least one porous and heat-resistant layer surrounding the hollow part of the hollow part.
  • this further process is characterized in that two mixtures, each containing inorganic, porous particles and a heat-resistant binder, are pressed zone by zone along the hollow part to be produced, to form directly dimensionally stable layers which penetrate into one another at their interface.
  • This process is therefore not limited to the processing of mixtures with non-cementitious binder.
  • Hollow parts of the type described in more detail above are preferably produced by this method, although cementitious binders can also be used.
  • the properties and the differences of the individual layers if there are several, reference is expressly made to what has been said above.
  • hardening of the binder is generally required. Since the layer (s) are dimensionally stable due to the pressing process, the hollow part can be carefully moved to another location and stored there to completely harden the binder.
  • a plurality of layers are produced in the manner according to the invention, these 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 pressing 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 / the strand movement with moving separation devices.
  • 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 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 carrying out the above-described method, which can be moved by a pressing tool movable in the longitudinal direction relative to the formwork or relative to the layer or layers to be produced, which, in each position, only has one in comparison to the entire longitudinal extent of the Hollow part acts short longitudinal area, is marked.
  • the pressing tool can move relative to the stationary formwork or relative to the stationary, other 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 in front of the pressing tool in the working direction.
  • pressing tools which rotate about the longitudinal axis of the hollow part relative to the hollow part are 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 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 disc 18 has on its outer circumference an axial, cylindrical extension 2 2 downwards.
  • 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 inverted bowl which closes the shaft 24 at the bottom, the bowl bottom forming a cone tapering upwards inside 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 provided.
  • 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 several 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 a mixture 28 of expanded perlite and an aqueous alkali metal silicate solution is supplied as a binder to the annular space between the hollow shaft 12 and the formwork 2, substantially uniformly distributed over its circumference.
  • This binder is also known as water glass.
  • the cavity of the hollow shaft 24 is a mixture 30 of expanded vermiculite and said binder is fed in 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.
  • 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 skid 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 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Laminated Bodies (AREA)
  • Tents Or Canopies (AREA)

Abstract

1. Hollow construction unit (36) for conduction of fluids in the building field, especially a chimney construction unit, which consists of at least one heat resistant first layer (34) of a mixture of inorganic porous particles and binder which surrounds the cavity of the hollow construction unit and which is pressed under compression against a second layer (32), characterised in that, also the second outer layer (32) and as the case may be at least one other layer consist of a mixture of inorganic porous particles and binder ; a plurality of such layers (32, 34) differ from each other as to the degree of compaction from compression and/or as to the material of the particles and/or as to particle size ; the respective binder is non-cementitious ; and the layers (32, 34) are pressed, in the as yet unhardened state under conditions of flow where they intermingle, to form a hollow construction unit of stable shape.

Description

Die Erfindung bezieht sich auf ein Hohlteil zur Fluidleitung für den Baubereich, insbesondere Schornsteinbauteil, das mindestens eine, den Hohlraum des Hohlteils umgebende, porös aufgebaute und wärmebeständige Schicht aufweist.The invention relates to a hollow part for fluid conduction for the building sector, in particular a chimney component, which has at least one porous and heat-resistant layer surrounding the hollow part of the hollow part.

Das erfindungsgemäße Hohlteil für den Baubereich, insbesondere für die Haustechnik, eignet sich außer als Schornsteinbauteil beispielsweise als Lüftungskanalbauteil, Bauteil für Warmluftkanäle, Abwasserleitungsteil und dergleichen. Der mindestens teilweise poröse Aufbau ergibt ein vergleichsweise leichtes Bauteil mit den hiermit verbundenen Vorteilen hinsichtlich Transport, Hantierung und geringerer, erforderlicher Festigkeit von Aufhängungs- oder Unterstützungsteilen, und ergibt ein dämmend wirkendes Hohlteil, wobei sich die Dämmwirkung beispielsweise auf Schalldämmung und/oder insbesondere auf Wärmedämmung bzw. Wärmeisolation beziehen kann. Die Wärmebeständigkeit der Schicht resultiert, wie weiter unten noch deutlicher werden wird, aus dem eingesetzten Material und muß nicht unbedingt für den Einsatzzweck des Hohlteils erforderlich sein, wie das Beispiel Lüftungskanalbauteil zeigt.The hollow part according to the invention for the construction sector, in particular for domestic engineering, is suitable, in addition to a chimney component, for example as a ventilation duct component, component for warm air ducts, a sewage line 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 thermal insulation or heat 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.

Ein Beispiel für ein bekanntes, gattungsgemäßes Hohlteil ist ein dreischichtiges Schornsteinbauteil mit einer wärmebeständigen Innenschicht und einer mittleren, porösen Isolierschicht, beispielsweise aus keramischem Fasermaterial. Bisher hat man die Isolierschicht üblicherweise nachträglich eingebracht, was arbeitsaufwendig ist.An example of a known, generic hollow part is a three-layer chimney component with a heat-resistant inner layer and a middle, porous insulating layer, for example made of ceramic fiber material. So far at h, the insulating layer usually introduced subsequently, which is labor-consuming.

Der Erfindung liegt die Aufgabe zugrunde, die Herstellbarkeit von Hohlteilen der eingangs genannten Art zu verbessern.The invention has for its object to improve the producibility of hollow parts of the type mentioned.

Zur Lösung dieser Aufgabe ist das erfindungsgemäße Hohlteil dadurch gekennzeichnet, daß die Schicht mit einer bei der Herstellung/stabil gepreßten Mischung anorganischer, poröser Teilchen mit einem wärmebeständigen, nichtzementös en Bindemittel aufgebaut ist.To achieve this object, the hollow part according to the invention is characterized in that the layer is built up with a mixture of inorganic, porous particles that is / pressed in the manufacture with a heat-resistant, non-cementitious binder.

Da die Schicht bei der Herstellung ineinenformstabilen Zustand gebracht ist, muß sie nicht zwischen zwei vorhandene Schichten eingbracht werden und ist nicht zwingend auf die tragende Unterstützung durch eine andere Schicht angewiesen.Since the layer is brought into a dimensionally stable state during manufacture, it does not have to be introduced between two existing layers and does not necessarily have to be supported by another layer.

Das Hohlteil kann im Grenzfall einschichtig sein, also nur aus der Schicht gemäß Anspruch 1 bestehen. Vorzugsweise ist das Hohlteil jedoch mehrschichtig, wobei mehrere oder gar alle, Schichten erfindungsgemäß aufgebaut sein können, aber auch eine oder mehrere nicht-erfindungsgemäß aufgebaute Schichten vorhanden sein können.In the limiting case, the hollow part can be single-layer, that is to say it can only consist of the layer according to claim 1. However, the hollow part is preferably multi-layered, it being possible for several or even all layers to be constructed in accordance with the invention, but also one or more layers not in accordance with the invention may be present.

Bei mehrschichtigem Aufbau können sich die einzelnen Schichten insbesondere hinsichtlich Dichte und/oder Festigkeit und/oder Dämmeigenschaften und/oder Säurebeständigkeit und/oder Wärmedehnungseigenschaften und/oder Diffusionsdichte unterscheiden. Dies gilt insbesondere auch bei mehreren Schichten der erfindungsgemäßen Art; hierbei können auch Unterschiede hinsichtlich Verdichtungsgrad beim Pressen und/oder Material der Teilchen und/oder Teilchengröße vorhanden sein. Das Hohlteil kann aber auch mehrere gleic aufgebaute Schichten aufweisen, beispielsweise zwei im Grundsatz gleiche, erfindungsgemäße Schichten, die lediglich aus Gründen des günstigeren Preßvorgangs gleichzeitig oder nacheinander erzeugt worden sind.In the case of a multilayer structure, the individual layers can differ, in particular in terms of density and / or strength and / or insulation properties and / or acid resistance and / or thermal expansion properties and / or diffusion density. This applies in particular to several layers of the type according to the invention; there may also be differences in the degree of compaction in the pressing and / or material of the particles and / or particle size. The hollow part can also have several layers of the same structure have, for example, two fundamentally identical layers according to the invention which have been produced simultaneously or in succession only for reasons of the more favorable pressing process.

Die Mischung muß nicht ausschließlich aus anorganischen, porö- sen Teilchen/einem wärmebeständigen, nichtzementösen Bindemittel bestehen, sondern kann weitere Bestandteile aufweisen, beispielsweise nicht-poröse Teilchen, Zusätze und dergleichen. So sind z. B. die Teilchen vorzugsweise bindemittelabweisend imprägniert, um an Bindemittel zu sparen. Geeignete Imprägnierungsmittel sind im Handel erhältlich, beispielsweise silikonhaltige Imprägnierungsmittel oder Eisen/III tri-Stearat. Obwohl Bindemittel bevorzugt sind, die ohne Wärmeeinwirkung erhärten, ist eine Beschleunigung der Erhärtung unter Wärmeeinwirkung auch im Rahmen der Erfindung möglich.The mixture does not have to consist exclusively of inorganic, porous particles / a heat-resistant, non-cementitious binder, but can have further constituents, for example non-porous particles, additives and the like. So z. B. the particles preferably impregnated binder-resistant to save on binder. Suitable impregnating agents are commercially available, for example silicone-containing impregnating agents or iron / III tri-stearate. Although binders are preferred which harden without the action of heat, acceleration of the hardening under the action of heat is also possible within the scope of the invention.

Als besonders bevorzugte Teilchenmaterialien seien expandiertes Vermiculit, expandiertes Perlit, Blähschiefer oder Blähton genannt, wobei auch Kombinationen dieser Materialien untereinander oder mit anderen Materialien möglich sind. Eine Kombination von Vermiculit mit Perlit ist wegen der günstigen erreichbaren Eigenschaftskombination besonders bevorzugt.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. A combination of vermiculite with pearlite is particularly preferred because of the favorable combination of properties that can be achieved.

Bevorzugte Schüttgewichte des Teilchenmaterials vor dem Pressen liegen im Bereich von 0,1 bis 0,4 t/m3. Bevorzugte Verdichtungsgrade beim Pressen der Mischung liegen im Bereich von 1,2 : 1 bis 2,5 : 1. Als bevorzugte Bindemittel kommen silikatische Bindemittel, vorzugsweise Alkalimetallsilikat-Bindemittel oder Aluminiumsilikat-Bindemittel, in Betracht. Alkalimetallsilikat-Bindemittel sind auch als Wasserglas und Aluminiumsilikat-Bindemittel sind auch als keramische Kleber bekannt.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: 1 to 2.5: 1. Preferred binders are silicate binders, preferably alkali metal silicate binders or aluminum silicate binders. Alkali metal silicate binders are also known as water glass and aluminum silicate binders are also known as ceramic adhesives.

Das erfindungsgemäße Hohlteil hat vorzugsweise eine langgestreckte Konfiguration. Die Erstreckung des Hohlteils ist vorzugsweise geradlinig. Der Außenumfang und/oder der Innenumfang kann beispielsweise rechteckig, quadratisch, abgerundet oder kreisförmig sein, wobei insbesondere im Fall des Schornsteinbauteils ein quadratischer Außenumfang und ein kreisrunder Innenumfang bevorzugt sind.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.

Gegenstand der Erfindung ist ferner ein Verfahren zur Herstellung eines Hohlteils zur Fluidleitung für den Baubereich, insbesondere eines Schornsteinbauteils, das mindestens eine, den Hohlraum des Hohlteils umgebende, porös aufgebaute und wärmebeständige Schicht aufweist. Dieses Verfahren ist erfindungsgemäß dadurch gekennzeichnet, daß eine anorganische, poröse Teilchen und ein wärmebeständiges, nichtzementöses Bindemittel aufweisende Mischung zonenweise längs des herzustellenden Hohlteils fortschreitend zu einer unmittelbar formstabilen Schicht gepreßt wird. Mit dem erfindungsgemäßen Verfahren werden vorzugsweise Hohlteile der vorstehend näherbeschriebenen Art hergestellt. Nach dem vorstehend beschriebenen Verfahren können auch mehrere Schichten eines Hohlteils erzeugt werden.The invention further relates to a method for producing a hollow part for fluid conduction for the construction area, in particular a chimney part, which has at least one porous and heat-resistant layer surrounding the hollow part of the hollow part. According to the invention, this process is characterized in that an inorganic, porous particle and a heat-resistant, non-cementitious binder mixture is pressed zone by zone along the hollow part to be produced to an immediately dimensionally stable layer. The method according to the invention is preferably used to produce hollow parts of the type described in more detail above. Several layers of a hollow part can also be produced by the method described above.

Gegenstand der Erfindung ist ferner ein Verfahren zur Herstellung eines Hohlteils zur Fluidleitung für den Baubereich, insbesondere eines Schornsteinbauteils, das mindestens eine, den Hohlraum des Hohlteils umgebende, porös aufgebaute und wärmebeständige Schicht aufweist. Dieses weitere Verfahren ist erfindungsgemäß dadurch gekennzeichnet, daß zwei, jeweils anorganische, poröse Teilchen und ein wärmebeständiges Bindemittel aufweisende Mischungen zonenweise längs des herzustellenden Hohlteils fortschreitend zu unmittelbar formstabilen, an ihrer Grenzfläche ineinanderdringenden Schichten gepreßt werden. Dieses Verfahren ist also nicht auf das Verarbeiten von Mischungen mit nichtzementösem Bindemittel beschränkt. Vorzugweise werden nach diesem Verfahren Hohlteileder vorstehend näher beschriebenen Art hergestellt, wobei allerdings auch zementöse Bindemittel in Betracht kommen. Hinsichtlich des Aufbaus,der Eigenschaften und der Unterschiede der einzelnen Schichten, sofern mehrere vorhanden sind, wird ausdrücklich auf das weiter vorne hierzu gesagte verwiesen. Nach dem Preßvorgang ist im allgemeinen ein Erhärten des Bindemittels erforderlich. Da die Schicht(en) durch den Preßvorgang formstabil sind, kann das Hohlteil zum vollständigen Erhärten des Bindemittels vorsichtig an einen anderen Ort verbracht und dort gelagert werden.The invention further relates to a method for producing a hollow part for fluid conduction for the construction area, in particular a chimney component, which has at least one porous and heat-resistant layer surrounding the hollow part of the hollow part. According to the invention, this further process is characterized in that two mixtures, each containing inorganic, porous particles and a heat-resistant binder, are pressed zone by zone along the hollow part to be produced, to form directly dimensionally stable layers which penetrate into one another at their interface. This process is therefore not limited to the processing of mixtures with non-cementitious binder. Hollow parts of the type described in more detail above are preferably produced by this method, although cementitious binders can also be used. With regard to the structure, the properties and the differences of the individual layers, if there are several, reference is expressly made to what has been said above. After the pressing process, hardening of the binder is generally required. Since the layer (s) are dimensionally stable due to the pressing process, the hollow part can be carefully moved to another location and stored there to completely harden the binder.

Wenn mehrere Schichten auf erfindungsgemäße Art erzeugt werden, werden diese vorzugsweise entweder gleichzeitig oder unmittelbar hintereinander erzeugt. Hierdurch entsteht eine gute stoffliche Verbindung zwischen diesen Schichten, da das Material an der Grenzfläche durch die Pressung sozusagen ineinander fließt. Das abschließende Erhärten der Bindemittel der Schichten geschieht dann vorzugsweise gleichzeitig.If a plurality of layers are produced in the manner according to the invention, these 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.

Ein ganz besonders wesentlicher Aspekt des erfindungsgemäßen Verfahrens ist die zonenweise längs des Hohlteils fortschreitende Pressung der Mischung für die jeweilige Schicht, so daß zum jeweiligen Zeitpunkt nur ein, gemessen am Gesamtvolumen der Schicht, vergleichsweise-kleines Mischungsvolumen gepreßt wird. Dies führt zu einer sehr gleichmäßigen Verdichtung und Pressung der Schicht, und man kommt mit vergleichsweise geringem Kraftaufwand bzw. leichtgebauten Preßeinrichtungen aus oder kann, gemessen am Kraftaufwand oder am Bauaufwand der Preßeinrichtung, verhältnismäßig hohe Verdichtungen bzw. Pressungen leisten. Die Geschwindigkeit des zonenweisen Fortschreitens der Pressung ist in verhältnismäßig weiten Grenzen wählbar und bestimmt zu einem gewissen Grad den Verdichtungsgrad der Mischung, wobei im allgemeinen niedrige Geschwindigkeiten hohe Verdichtungsgrade ergeben und umgekehrt. Die Geschwindigkeit des zonenweisen Fortschreitens kann konstant sein bzw. nach Vorversuchen festgelegt sein, kann aber auch in Abhängigkeit vom erreichten Verdichtungsgrad geregelt werden.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. This leads to a very uniform compression and compression of the layer, and one can get by with comparatively little effort or lightweight press devices or, measured by the effort or the construction costs of the press device, relatively high compressions or pressures can be achieved. The speed of the zone-wise progress of the pressing 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.

Mit dem erfindungsgemäßen Verfahren lassen sich Schichten mit besonders hohem Schlankheitsgrad ohne weiteres erzeugen. Man erhält mit der Erfindung eine wesentlich gleichmäßigere Pressung als beim insgesamt axialen Verdichten von Schichten.With the method according to the invention, layers with a particularly high degree of slenderness can easily be produced. With the invention, a much more uniform compression is obtained than with the overall axial compression of layers.

Infolge des erfindungsgemäßen, zonenweisen Fortschreitens der Pressung eignet sich das erfindungsgemäße Verfahren zur kontinuierlichen Fertigung der Hohlbauteile als sich axial bewegender Strang, der, beispielsweise mittels/der Strangbewegung mit.,bewegter Trenneinrichtungen, in die einzelnen Hohlbauteile unterteilt wird.As a result of the zone-wise progress of the pressing according to the invention, 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 / the strand movement with moving separation devices.

Obwohl erfindungsgemäß die herzustellende Schicht bzw. die herzustellenden Schichten ohne Zuhilfenahme einer stützenden Schalung oder einer stützenden, anderen Schicht des herzustellenden Hohlteils erzeugt werden können, ist es bevorzugt, daß die Schicht(en) innen oder außen an eine Schalung oder eine andere, den Hohlraum des Hohlteils umgebende Schicht angepreßt wird (werden). Wenn die erfindungsgemäß aufgebrachte Schicht innen auf eine Schalung oder eine andere, den Hohlraum des Hohlteils umgebende Schicht aufgebracht wird, arbeitet man vorzugsweise ohne Schalung innerhalb der erfindungsgemäß aufgebrachten Schicht. Wenn die erfindungsgemäß aufgebrachte Schicht außen auf eine Schalung oder eine andere, den Hohlraum des Hohlteils umgebende Schicht aufgebracht wird, arbeitet man vorzugsweise ohne eine Schalung außerhalb der erfindungsgemäß aufgebrachten Schicht.Although according to the invention 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 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.

Gegenstand der Erfindung ist ferner eine Vorrichtung zur Durchführung der vorstehend beschriebenen Verfahren, die durch ein in Längsrichtung relativ zu der Schalung oder relativ zu der herzustellenden Schicht bzw. den herzustellenden Schichten bewegbares Preßwerkzeug, das in jeder Stellung nur auf einen im Vergleich zur gesamten Längserstreckung des Hohlteils kurzen Längsbereich einwirkt, gekennzeichnet ist. Dabei kann sich das Preßwerkzeug relativ zur stationären Schalung oder relativ zu der stationären, anderen oder herzustellenden Schicht bewegen, oder es kann sich die Schalung oder die als Schalung dienende andere Schicht oder die herzustellende Schicht relativ zum in Längsrichtung stationär bleibenden Preßwerkzeug bewegen. Die letztere Möglichkeit kommt insbesondere bei der oben beschriebenen, kontinuierlichen Fertigung in Betracht, kann aber auch bei diskontinuierlicher Fertigung eingesetzt werden.The invention further relates to a device for carrying out the above-described method, which can be moved by a pressing tool movable in the longitudinal direction relative to the formwork or relative to the layer or layers to be produced, which, in each position, only has one in comparison to the entire longitudinal extent of the Hollow part acts short longitudinal area, is marked. The pressing tool can move relative to the stationary formwork or relative to the stationary, other 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.

Vorzugsweise ist eine Zuführeinrichtung zum fortlaufenden Zuführung der Mischung zum in Arbeitsrichtungvor dem Preßwerkzeug befindlichen Bereich vorgesehen. Es ist aber auch ein diskontinuierliches oder im Extremfall ein einmaliges Zuführen der Mischung zu Beginn möglich.Preferably, a feed device is provided for continuously feeding the mixture to the area in front of the pressing tool in the working direction. However, it is also possible to feed the mixture batchwise or, in extreme cases, once, at the beginning.

Bei der erfindungsgemäßen Vorrichtung sind Preßwerkzeuge, die um die Längsachse des Hohlteils relativ zum Hohlteil rotieren, besonders bevorzugt. Technisch besonders einfach verwirklichbar sind solche Preßwerkzeuge bei kreisrundem, unmittelbarem Einwirkungsbereich der Preßwerkzeuge. Man kann mit rotierendem Preßwerkzeug und nicht rotierendem Hohlteil und umgekehrt arbeiten.In the device according to the invention, pressing tools which rotate about the longitudinal axis of the hollow part relative to the hollow part are 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.

Als Preßwerkzeuge sind insbesondere Rollenköpfe oder Kufenköpfe bevorzugt. Bei Rollenköpfen geschieht das Pressen im sich verjüngenden Rollspalt, und beim Kufenkopf geschieht das Pressen durch die Relativbewegung einer Kufe, die vorn einen größeren Materialdurchlaßspalt als hinten besitzt, bzw. passend angestellt ist. Detailliertere Erläuterungen zu diesen Preßwerkzeugen finden sich weiter unten beim Ausführungsbeispiel.Roller heads or skid heads are particularly preferred as pressing tools. In the case of roller heads, 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.

Wenn mehrere Schichten auf erfindungsgemäße Art erzeugt werden, geschieht dies vorzugsweise durch hinsichtlich der'Längsrichtung des Hohlteils an im wesentlichen gleicher Stelle angeordnete oder in Längsrichtung des Hohlteils hintereinanderangeordnete Preßwerkzeuge. Letztere sind vorzugsweise gemeinsam in Längsrichtung bewegbar. Besonders günstig ist eine unmittelbare, körperliche Verbindung zwischen den Preßwerkzeugen, so daß sie mittels einer gemeinsamen Einrichtung in Längsrichtung bewegt werden können.If several layers are produced in the manner according to the invention, this is preferably done by 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 so that they can be moved in the longitudinal direction by means of a common device.

Bevorzugt ist eine eigene Zuführeinrichtung für die Materialmischung pro Preßwerkzeug. Dies ist für die Funktion der Preßwerkzeuge günstig und bei unterschiedlichen Mischungen pro Schicht zwingend.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.

Technisch besonders unaufwendig und kompakt ist eine bevorzugte Weiterbildung der erfindungsgemäßen Vorrichtung, bei der das in Arbeitsrichtung vordere Preßwerkzeug ein mittels einer ersten Welle rotierbarer Rollenkopf ist, das anschließende Preßwerkzeug ein mittels einer zur ersten Welle koaxialen, zweiten Welle rotierbarer Kufenkopf ist, und bei der der Hohlraum einer oder beider Wellen als Zuführeinrichtung dient.Technically particularly inexpensive and compact is a preferred development of the device according to the invention, in which 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, and in which the Cavity of one or both shafts serves as a feed device.

Nach der Erfindung lassen sich ohne Schwierigkeiten auch Öffnungen in der Wand herstellen, wobei man z. B. an der entsprechenden Stelle bei der Herstellung einen Kern einsetzt. Durah die erfindungsgemäße Pressung wird der den Kern umgebende Bereich gut verdichtet.According to the invention, 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.

Die Erfindung wird nachfolgend anhand einer Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens und eines mit dieser Vorrichtung hergestellten Hohlteils beispielhaft noch näher erläutert. Es zeigen:

  • Fig. 1 einen halben Axialschnitt durch das Kernstück einer Vorrichtung zur Herstellung eines Hohlteils;
  • Fig. 2 einen Axialschnitt durch ein mit dieser Vorrichtung hergestelltes Hohlteil;
  • Fig. 3 einen Querschnitt dieses Hohlteils.
The invention is explained in more detail below using an apparatus for carrying out the method according to the invention and a hollow part produced with this apparatus. Show it:
  • 1 shows a half axial section through the core of a device for producing a hollow part.
  • 2 shows an axial section through a hollow part produced with this device;
  • Fig. 3 shows a cross section of this hollow part.

In Fig. 1 erkennt man eine langgestreckte Schalung 2, die an beiden Stirnseiten offen ist und mit einer Stirnseite auf einer Unterlage 4 aufruht. Die Schalung 2 besteht aus Stahlplatten und besitzt im Querschnitt bzw. in der Stirnansicht eine quadratische Gestalt. Die Mittelachse 6 der Schalung 2 ist geradlinig.In 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.

An einem nicht dargestellten, in Längsrichtung der Schalung 2 verfahrbaren Schlitten hängen ein Rollenkopf 8 und darunter ein Kufenkopf 10. Der Rollenkopf 8 wird von einer vertikalen Hohlwelle 12 getragen und weist an seinem Außenumfang verteilt vier Rollen 14 auf, von denen eine in Fig. 1 erkennbar ist. Die Rollen 14 sind jeweils auf einer vertikalen Achse 16 drehbar gelagert, wobei sich die Achsen 16 jeweils zwischen einer unteren, kräftigen Scheibe 18 und einer oberen, kräftigen Scheibe 20 erstrecken. Die Scheiben 18 und 20 weisen jeweils eine zentrale Öffnung auf, in deren Bereich sie an der Hohlwelle 12 befestigt sind. Die Scheiben 18 und 20 besitzen einen Außendurchmesser, der dem Durchmesser eines zugleich um die vier Rollen 14 herumgelegten, gedachten Berührungskreises entspricht. Die untere Scheibe 18 weist an ihrem Außenumfang eine axiale, zylindrische Verlängerung 22 nach unten auf.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 disc 18 has on its outer circumference an axial, cylindrical extension 2 2 downwards.

Der Kufenkopf 10 ist von einer vertikalen weiteren Hohlwelle 24 getragen, die koaxial in der Hohlwelle 12 angeordnet ist. Der Kufenkopf 10 weit im wesentlichen die Gestalt eines umgedrehten, die Welle 24 unten abschließenden Napfes auf, wobei der Napfboden innerhalb der Welle 24 einen sich nach oben verjüngenden Kegel bildet und außen an der=zylindrischen Napfwand 4 über den Umfang des Kufenkopfes 10 verteilte Kufen 26 vorgesehen sind. Im vertikalen Umfangsschnitt gesehen besitzt jede der Kufen 26 in Rotationsrichtung vorn eine nach oben gekrümmte Arbeitsfläche. Die Napfwand steht nach unten über die Kufen 26 vor.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 inverted bowl which closes the shaft 24 at the bottom, the bowl bottom forming a cone tapering upwards inside 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 provided. Viewed in the vertical circumferential section, 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.

Sowohl die Hohlwelle 12 als auch die Welle 24 sind in dem oben erwähnten Schlitten drehbar gelagert, wobei die Welle 24 zusätzlich weiter unten in der Hohlwelle 12 gelagert ist. Sowohl die Hohlwelle 12 als auch die Welle 24 sind mittels eines auf dem Schlitten angeordneten Antriebs, beispielsweise Elektromotor mit Zahnrad-Drehmomentübertragung zu den Wellen 12 und 24, rotierend antreibbar.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.

Die Drehzahl der beiden Wellen 12 und 24 kann gleich sein,' muß aber nicht gleich sein. Durch Vertikalbewegung des Schlittens längs geeigneter, zu der Schalung 2 paralleler Führungen können der Rollenkopf 8 und der Kufenkopf 10 angehoben und abgesenkt werden.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.

Die Kufen 26 ragen radial annähernd so weit nach außen, wie es dem Außenumfang der Scheibe 18 bzw. dem Außenumfang der Verlängerung 22 entspricht. Der vertikale Abstand zwischen den Kufen 26 und der axialen Mitte der Rollen 14 beträgt beispielsweise 15 bis 30 cm. Im Bereich zwischen dem Rollenkopf 8 und dem Kufenkopf 10 besitzt die Welle 24 am Umfang verteilt mehrere vertikale Schlitze 25 zum MaterialdurchlaßThe 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. In the area between the roller head 8 and the runner head 10, the shaft 24 has several vertical slots 25 distributed around the circumference for the passage of material

Zu Beginn der Herstellung eines Hohlteils werden der Rollenkopf 8 und der Kufenkopf 10 weitestmöglich abgesenkt. Dann wird dem Ringraum zwischen der Hohlwelle 12 und der Schalung 2 über seinen Umfang im wesentlichen gleichmäßig verteilt eine Mischung 28 aus expandiertem Perlit und einer wässrigen Akalimetallsilicatlösung als Bindemittel zugeführt. Dieses Bindemittel ist auch als Wasserglas bekannt. Dem Hohlraum der Hohlwelle 24 wird
von oben eine Mischung 30 aus geblähtem Vermiculit und dem genannten Bindemittel zugeführt. Die Mischung 28 gelangt durch Schwerkraft in den Bereich zwischen den Rollen 14 und der Schalung 2. Die Mischung 30 gelangt durch Schwerkraft in den Bereich der Kufen 26. Durch Rotieren des Rollenkopfes 8 entsteht im Einzugsbereich jeder Rolle 14 eine Keilwirkung , zwischen der jeweiligen Rolle 14 und der Schalung 2, wodurch die Mischung 28 zu einer Schicht 32 gepreßt wird, in der die Hohlräume zwischen den Perlitteilchen weitgehend durch das Bindemittel ausgefüllt sind. Durch Drehung des Kufenkopfes 10 gelangen immer neue Teilmengen der Mischung 30 unter das aufgebogene Vorderende der Kufen 26.und werden dort axial nach unten zur Schicht 34 gepreßt, bei der die Hohräume zwischen den Vermiculitteilchen weitgehend durch das Bindemittel ausgefüllt sind. Durch allmähliches gemeinsames Anheben des Rollenkopfes 8 und des Kufenkopfes 10 wachsen die gepreßten Schichten 32 und 34 von unten nach oben. Dabei wird dafür gesorgt, daß der Rollenkopf 8 und der Kufenkopf 10 stets mit genügend Nachschub-Mischung 28 bzw. 30 versorgt sind.At the start of the production of a hollow part, the roller head 8 and the runner head 10 are lowered as much as possible. Then a mixture 28 of expanded perlite and an aqueous alkali metal silicate solution is supplied as a binder to the annular space between the hollow shaft 12 and the formwork 2, substantially uniformly distributed over its circumference. This binder is also known as water glass. The cavity of the hollow shaft 24 is
a mixture 30 of expanded vermiculite and said binder is fed in 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. By rotating the roller head 8, a wedge effect occurs between the respective roller 14 in the feed area of each roller 14 and the formwork 2, whereby the mixture 28 is pressed into a layer 32 in which the cavities between the pearlite particles are largely filled by the binder. By rotating the runner head 10, new portions of the mixture 30 always get under the bent front end of the runner 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. By gradually lifting the roller head 8 and the runner head 10 together, 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.

Durch die Preßvorgänge mit Hilfe des Rollenkopfes 8 im Fall der äußeren Schicht 32 und mit Hilfe des Kufenkopfes 10 im Fall der inneren Schicht 34 werden die Schichten 32 und 34 derart formstabil, daß die Schalung 2 nach Einbringen der Schichten 32 und 34 in gewünschter Höhe und nach Herausfahren des Rollenkopfes 8 gemeinsam mit dem Kufenkopf 10 nach oben aus der Schalung 2 die Schalung 2 mit den Schichten 32 und 34 aus der Vorrichtung entfernt werden kann. Dort erhärten die Bindemittel der beiden Schichten 32 und 34, was durch Wärmeeinwirkung beschleunigt sein kann. Schließlich wird die Schalung 2 von dem so gebildeten Hohlteil 36, das aus den beiden Schichten 32 und 34 besteht, abgezogen.Through the pressing processes with the help of the roller head 8 in the case of the outer layer 32 and with the help of the skid head 10 in the case of the inner layer 34, 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 skid 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.

Analog kann man beim Aufbringen von Schichten außen auf eine Innenschalung vorgehen. Statt der Schalung kann man auch einen vorgefertigten, eigenfesten Körper einsetzen, der später einen Schichtbestandteil des fertigen Hohlteils bildet. Man kann auch einen Rollenkopf mit um eine waagerechte Achse drehbaren Rollen und/oder einen Kufenkopf mit radialer statt axialer Verdichtungsrichtung einsetzen.The same procedure can be followed when applying layers on the outside of an internal formwork. Instead of the formwork, you can also use a prefabricated, intrinsically rigid body that later forms a layer component of the finished hollow part. It is also possible to use a roller head with rollers rotatable about a horizontal axis and / or a roller head with a radial instead of an axial compression direction.

In den Fig. 2 und 3 erkennt man das fertiggestellte Hohlteil 36, beispielsweise ein Schornsteinbauteil. Dieses kann stockwerkshoch sein. Auf die innere Schicht 34 ist nachträglich innen eine keramische Schicht 38 aufgebracht worden.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.

Da die Schalung 2 eine quadratische Innenkontur besitzt und' der Rollenkopf 8 eine kreisrunde Innenkontur der äußeren Schicht 32 erzeugt, ist die Verdichtung der Mischung 28 in den Ecken weniger stark als zwischen den Ecken. Dennoch ist das Hohlteil 36 genügend stabil. Eine nichtrunde Außenkontur des Hohlteils 36 wird aus Einbaugründen bevorzugt.Since 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 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.

Das beschriebene Verfahren und die beschriebene Vorrichtung zur Herstellung des Schornsteinbauteils zeichnen sich durch große Einfachheit aus. Das Schornsteinbauteil besitzt insbesondere hinsichtlich Gewicht, Wärmedehnungsverhalten, Isolierung und Beständigkeit in mechanischer und chemischer Hinsicht hervorragende Eigenschaften.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.

Man kann aber auch ganz ohne Schalung 2 oder einen vorgefertigen, als Schalung dienenden Schichtbestandteil des herzustellenden Hohlteils arbeiten. Ein Beispiel dafür ist das Vorsehen eines inneren, in Längsrichtung stationären Rollenkopfes entsprechend dem beschriebenen Rollenkopf 8 und das Vorsehen eines äußeren, ebenfalls in Längsrichtung stationären Rollenkopfes. Beide Rollenköpfe rotieren, und in den so gebildeten, zylindrischen Verdichtungsraum werden fortlaufend zwei Mischungen, jeweils aus porösen Teilchen und einem Bindemittel, von oben zugeführt. Durch die Pressung zwischen den beiden Rollenköpfen entsteht ein eigenstabiler Strang, der fortlaufend nach unten abgesenkt und axial in einzelne Hohlbauteile getrennt wird. Die den beiden Mischungen entsprechenden Schichten fließen an ihrer Grenzfläche zusammen und dringen durch die Pressung zu einem gewissen Grad ineinander ein. Dies ist ein Beispiel eines kontinuierlichen und gemäß Anspruch 10 arbeitenden Herstellungsverfahrensund einer entsprechenden Vorrichtung.However, it is also possible to work entirely without formwork 2 or a prefabricated layer component of the hollow part to be produced which serves as formwork. An example of this is the provision of an inner roller head which is stationary in the longitudinal direction in accordance with the roller head 8 described and the provision of an outer roller head which is likewise stationary in the longitudinal direction. Both roller heads rotate, and two mixtures, each made of porous particles and a binder, are continuously fed into the cylindrical compression chamber thus formed from above. The pressure between the two roller heads creates an inherently stable strand that is continuously lowered downwards and axially separated into individual hollow components. The layers corresponding to the two mixtures flow together at their interface and penetrate to a certain extent through the pressing. This is an example of a continuous manufacturing process and apparatus according to claim 10.

Claims (20)

1. Hohlteil zur Fluidleitung für den Baubereich, insbesondere Schornsteinbauteil, das mindestens eine den Hohlraum des Hohlteils umgebende, porös aufgebaute und wärmebeständige Schicht aufweist,
dadurch gekennzeichnet ,
daß die Schicht (32;34) mit einer bei der Herstellung formstabil gepreßten Mischung anorganischer, poröser Teilchen mit einem wärmebeständigen, nichtzementösen Bindemittel aufgebaut ist.1. hollow part for fluid conduction for the construction area, in particular chimney part, which has at least one porous and heat-resistant layer surrounding the hollow part of the hollow part,
characterized ,
that the layer (32; 34) is built up with a mixture of inorganic, porous particles pressed with a stable shape during manufacture with a heat-resistant, non-cementitious binder. 2. Hohlteil nach Anspruch 1, dadurch gekennzeichnet, daß mehrere derartige Schichten (32,34) vorgesehen sind, die sich hinsichtlich des Verdichtungsgrades beim Pressen und/oder des Materials der Teilchen und/oder der Teilchengröße unterscheiden.2. Hollow part according to claim 1, characterized in that a plurality of such layers (32, 34) are provided which differ with regard to the degree of compaction when pressing and / or the material of the particles and / or the particle size. 3. Hohlteil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Teilchen bindemittelabweisend imprägniert sind.3. Hollow part according to claim 1 or 2, characterized in that the particles are impregnated binder-repellent. 4. Hohlteil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß Teilchen aus expandiertem Vermiculit, expandiertem Perlit, Blähschiefer oder Blähton eingesetzt sind.4. Hollow part according to one of claims 1 to 3, characterized in that particles of expanded vermiculite, expanded pearlite, expanded shale or expanded clay are used. 5. Hohlteil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Teilchen vor dem Pressen ein Schüttgewicht von 0,1 bis 0,4 t/m3 besitzen.5. Hollow part according to one of claims 1 to 4, characterized in that the particles have a bulk density of 0.1 to 0.4 t / m3 before pressing. 6. Hohlteil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß ein silikatisches Bindemittel, vorzugsweise ein Alkalimetallsilikat-Bindemittel oder Aluminiumsilikat-Bindemittel, eingesetzt ist.6. Hollow part according to one of claims 1 to 5, characterized in that a silicate binder, preferably an alkali metal silicate binder or aluminum silicate binder, is used. 7. Hohlteil nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Mischung mit einem Verdichtungsgrad von 1,2 : 1 bis 2,5 : 1 gepreßt ist.7. Hollow part according to one of claims 1 to 6, characterized in that the mixture is pressed with a degree of compression of 1.2: 1 to 2.5: 1. 8. Verfahren zur Herstellung eines Hohlteils zur Fluidleitung für den Baubereich, insbesondere eines Schornsteinbauteils, das mindestens eine, den Hohlraum des Hohteils umgebende, porös aufgebaute und wärmebeständige Schicht aufweist, dadurch gekennzeichnet, daß eine anorganische, poröse Teilchen und ein wärmebeständiges, nichtzememtöses Bindemittel aufweisende Mischung zonenweise längs des herzustellenden Hohlteils fortschreitend zu einer unmittelbar formstabilen Schicht gepreßt wird.8. A method for producing a hollow part for fluid conduction for the construction sector, in particular a chimney component, which has at least one, surrounding the cavity of the hollow part, porous and heat-resistant layer, characterized in that an inorganic, porous particles and a heat-resistant, non-cementitious binder Mixing zone by zone along the hollow part to be produced is pressed into an immediately dimensionally stable layer. 9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß mehrere Schichten auf derartige Weise erzeugt werden.9. The method according to claim 8, characterized in that several layers are produced in such a way. 10. Verfahren zur Herstellung eines Hohlteils zur Fluidleitung für den Baubereich, insbesondere eines Schornsteinbauteils, das mindestens eine, den Hohlraun des Hohlteils umgebende, porös aufgebaute und wärmebeständige Schicht aufweist, dadurch gekennzeichnet, daß zwei, jeweils anorganische, poröse Teilchen und ein wärmebeständiges Bindemittel aufweisende Mischungen zonenweise
längs des herzustellenden Hohlteils fortschreitend zu unmittelbar formstabilen, an ihrer Grenzfläche ineinander dringeden Schichten gepreßt werden.10. A method for producing a hollow part for fluid conduction for the construction sector, in particular a chimney component, which has at least one, porous and heat-resistant layer surrounding the hollow space of the hollow part, characterized in that two, each having inorganic, porous particles and a heat-resistant binder Mixtures by zone
are progressively pressed along the hollow part to be produced to form layers which are immediately dimensionally stable and intermesh at their interface. 11. Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß die Schichten unmittelbar hintereinander erzeugt werden.11. The method according to claim 9 or 10, characterized in that the layers are produced in immediate succession. 12. Verfahren nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, daß die Hohlbauteile als sich axial bewegender Strang, der in die einzelnen Hohlbauteile unterteilt wird, kontinuierlich gefertigt werden.12. The method according to any one of claims 8 to 11, characterized in that the hollow components are continuously manufactured as an axially moving strand, which is divided into the individual hollow components. 13. Verfahren nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, daß die Schicht(en) innen oder außen an eine Schalung oder eine andere, den Hohlraum des Hohlteils umgebende Schicht angepreßt wird (werden).13. The method according to any one of claims 8 to 12, characterized in that the layer (s) is pressed inside or outside of a formwork or another layer surrounding the cavity of the hollow part (are). 14. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 8 bis 12, gekennzeichnet durch ein in Längsrichtung relativ zu der Schalung (2) oder der herzustellenden Schicht bzw. den herzustellenden Schichten (32, 34) bewegbares Preßwerkzeug (8;10), das in jeder Stellung nur auf einen im Vergleich zur gesamten Längserstreckung des Hohlteils (36) kurzen Längsbereich einwirkt.14. An apparatus for performing the method according to one of claims 8 to 12, characterized by a pressing tool (8; 10) movable in the longitudinal direction relative to the formwork (2) or the layer or layers (32, 34) to be produced, the in each position only acts on a short longitudinal region in comparison to the entire longitudinal extent of the hollow part (36). 15. Vorrichtung nach Anspruch 14, gekennzeichnet durch eine Zuführeinrichtung zum fortlaufenden Zuführen der Mischung zum in Arbeitsrichtung vor dem Preßwerkzeug (8;10) befindlichen Bereich.15. The apparatus according to claim 14, characterized by a feed device for continuously feeding the mixture to the area in the working direction in front of the pressing tool (8; 10). 16. Vorrichtung nach Anspruch 14 oder 15, dadurch gekennzeichnet, daß das Preßwerkzeug (8;10) um die Längsachse des Hohlteils (36) relativ zum Hohlteil (36) rotiert.16. The apparatus according to claim 14 or 15, characterized in that the pressing tool (8; 10) rotates about the longitudinal axis of the hollow part (36) relative to the hollow part (36). 17. Vorrichtung nach einem der Ansprüche 14 bis 16, dadurch gekennzeichnet, daß das Preßwerkzeug ein Rollenkopf (8) oder ein Kufenkopf (10) ist.17. The device according to one of claims 14 to 16, characterized in that the pressing tool is a roller head (8) or a skid head (10). 18. Vorrichtung nach einem der Ansprüche 14 bis 17, gekennzeichnet durch zwei oder mehr, in Längsrichtung hintereinander angeordnete Preßwerkzeuge (8,10), die vorzugsweise gemeinsam in Längsrichtung bewegbar sind.18. Device according to one of claims 14 to 17, characterized by two or more pressing tools (8, 10) arranged one behind the other in the longitudinal direction, which are preferably movable together in the longitudinal direction. 19. Vorrichtung nach Anspruch 18, dadurch gekennzeichnet, daß pro Preßwerkzeug (8;10) eine eigene Zuführeinrichtung für die jeweilige Mischung vorgesehen ist.19. The apparatus according to claim 18, characterized in that a separate feed device for the respective mixture is provided per pressing tool (8; 10). 20. Vorrichtung nach Anspruch 18 und 19, dadurch gekennzeichnet, daß das in Arbeitsrichtung vordere Preßwerkzeug ein mittels einer ersten Welle (12) rotierbarer Rollenkopf (8) ist, daß das anschließende Preßwerkzeug ein mittels einer zur ersten Welle koaxialen zweiten Welle (24) rotierbarer Kufenkopf (10) ist, und daß der Hohlraum einer oder beider Wellen (12;24) als Zuführeinrichtung dient.20. The apparatus of claim 18 and 19, characterized in that the front pressing tool in the working direction is a by means of a first shaft (12) rotatable roller head (8), that the subsequent pressing tool is rotatable by means of a second shaft (24) coaxial with the first shaft Skid head (10), and that the cavity of one or both shafts (12; 24) serves as a feed device.
EP82107099A 1981-08-07 1982-08-05 Hollow construction unit for fluids in the building field, particularly a chimney construction unit, as well as a method of and a device for manufacturing the same Expired EP0072506B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82107099T ATE30756T1 (en) 1981-08-07 1982-08-05 HOLLOW PART FOR FLUID LINE FOR THE BUILDING SECTOR, IN PARTICULAR CHIMNEY COMPONENT, AND METHOD AND DEVICE FOR ITS MANUFACTURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813131313 DE3131313A1 (en) 1981-08-07 1981-08-07 "HOLLOW PART TO THE FLUID PIPE FOR THE CONSTRUCTION AREA, ESPECIALLY CHIMNEY COMPONENT, AND METHOD AND DEVICE FOR THE PRODUCTION THEREOF"
DE3131313 1981-08-07

Publications (2)

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

Family

ID=6138831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107099A Expired EP0072506B1 (en) 1981-08-07 1982-08-05 Hollow construction unit for fluids in the building field, particularly a chimney construction unit, as well as a method of and a device for manufacturing the same

Country Status (3)

Country Link
EP (1) EP0072506B1 (en)
AT (1) ATE30756T1 (en)
DE (2) DE3131313A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123834A1 (en) * 1983-03-29 1984-11-07 Jacob Plein-Wagner Söhne Steinzeugwarenfabrik KG Prefabricated interior element for a chimney made of fire brick, concrete or the like
US5021202A (en) * 1987-02-02 1991-06-04 Jan Novotny Method and apparatus for constructing rammed earth walls with integral cement jackets
EP1108829A3 (en) * 1999-12-14 2003-01-02 SAINT-GOBAIN ISOVER G+H Aktiengesellschaft Prefabricated element comprising a mantle block and an internal insulating shell and manufacturing method
CN103600413A (en) * 2013-09-02 2014-02-26 桐乡市高桥巨峰装饰材料有限公司 Flue pulping platform

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH470558A (en) * 1966-05-20 1969-03-31 Rawitzer Alois Process for the production of fittings for single or multi-pass inner pipe chimneys and fitting produced according to the process
AT328693B (en) * 1973-12-11 1976-04-12 Wienerberger Baustoffind Ag FIREPLACE AND METHOD OF MANUFACTURING IT
EP0015469A1 (en) * 1979-03-08 1980-09-17 Georg Fischer Aktiengesellschaft Apparatus for pressing a concrete pipe in an underlying socket by centrifugal force
EP0026945A1 (en) * 1979-10-04 1981-04-15 Hans Kramer GmbH & Co. KG Dämmstoffwerk Method and device for lining hollow shaped parts on the interior

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276091A (en) * 1964-04-20 1966-10-04 Charles B Pausch Roller head for cement pipe forming
DE1659703C3 (en) * 1967-07-20 1973-10-04 Didier-Werke Ag, 6200 Wiesbaden Method for producing a molded block, in particular for erecting chimneys in buildings, and molded block produced using the method
US3776677A (en) * 1970-12-24 1973-12-04 Monier Res & Dev Pty Ltd Pipe making machine
GB1393899A (en) * 1971-08-17 1975-05-14 Dexion Comino Int Ltd Heat-resisting thermal insulating materials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH470558A (en) * 1966-05-20 1969-03-31 Rawitzer Alois Process for the production of fittings for single or multi-pass inner pipe chimneys and fitting produced according to the process
AT328693B (en) * 1973-12-11 1976-04-12 Wienerberger Baustoffind Ag FIREPLACE AND METHOD OF MANUFACTURING IT
EP0015469A1 (en) * 1979-03-08 1980-09-17 Georg Fischer Aktiengesellschaft Apparatus for pressing a concrete pipe in an underlying socket by centrifugal force
EP0026945A1 (en) * 1979-10-04 1981-04-15 Hans Kramer GmbH & Co. KG Dämmstoffwerk Method and device for lining hollow shaped parts on the interior

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123834A1 (en) * 1983-03-29 1984-11-07 Jacob Plein-Wagner Söhne Steinzeugwarenfabrik KG Prefabricated interior element for a chimney made of fire brick, concrete or the like
US5021202A (en) * 1987-02-02 1991-06-04 Jan Novotny Method and apparatus for constructing rammed earth walls with integral cement jackets
EP1108829A3 (en) * 1999-12-14 2003-01-02 SAINT-GOBAIN ISOVER G+H Aktiengesellschaft Prefabricated element comprising a mantle block and an internal insulating shell and manufacturing method
CN103600413A (en) * 2013-09-02 2014-02-26 桐乡市高桥巨峰装饰材料有限公司 Flue pulping platform
CN103600413B (en) * 2013-09-02 2016-01-20 桐乡市高桥巨峰装饰材料有限公司 Flue making beating platform

Also Published As

Publication number Publication date
ATE30756T1 (en) 1987-11-15
DE3277632D1 (en) 1987-12-17
DE3131313A1 (en) 1983-03-03
EP0072506B1 (en) 1987-11-11

Similar Documents

Publication Publication Date Title
DE2133320B2 (en) Method for producing a shaped body with at least one continuous cavity made of a powdery component that sets with liquid and a fibrous component
EP0072506B1 (en) Hollow construction unit for fluids in the building field, particularly a chimney construction unit, as well as a method of and a device for manufacturing the same
EP0329856A2 (en) Apparatus for making concrete articles
DE68912112T2 (en) METHOD FOR PRODUCING A RIVETING NAIL, OR RELATING TO A COVERED RIVETING NAIL, AND DEVICE FOR CARRYING OUT THE METHOD.
DE2054168B2 (en) Device for the production of blocks made of broken marble and polyester resin by mixing and vibrating these materials under negative pressure
DE2548894C2 (en) Method and device for producing elements from aerated concrete
EP0589196B1 (en) Device for making concrete pipes
DE2729197A1 (en) METHOD AND APPARATUS FOR PRODUCING MOLDINGS OF HIGH ACCURACY FROM FIBER MATERIALS
DE3301562C1 (en) Device for making concrete blocks
EP1308254B1 (en) Apparatus for the production of concrete pipes
DE2059760C2 (en) Slip maker for the production of moldings from concrete or similar material
DE2917578A1 (en) METHOD AND DEVICE FOR PRODUCING HEAT-INSULATING COMPOSITE PROFILES
DE3435196A1 (en) SPIN CASTING PROCESS
DE69004015T2 (en) Method and device for producing reinforced concrete pipes.
DE8138616U1 (en) DEVICE FOR THE PRODUCTION OF HOLLOW PARTS FOR THE FLUID PIPE FOR THE CONSTRUCTION AREA, IN PARTICULAR CHIMNEY COMPONENTS
DE8123186U1 (en) HOLLOW PART TO THE FLUID PIPE FOR THE CONSTRUCTION AREA, IN PARTICULAR CHIMNEY COMPONENT
DE2057063C3 (en) Device for the production of metal fiber nonwovens
DE3009184A1 (en) MACHINE AND METHOD FOR PRODUCING FOUNDRY CORES
DE232800C (en)
EP1281492A1 (en) Compaction device
DE958544C (en) Method and device for the production of grooved lightweight concrete bodies by means of forming rollers
DE2123323C3 (en) Method of making a sintered filter
AT410295B (en) Method for casting concrete bowl-shaped bodies for shaft base
DE19917669A1 (en) Method to manufacture chimney element stone; involves using spray head to spray layer of insulation mortar to wall of inner opening in outer cladding
DE3610782A1 (en) Process and device for producing a heat-insulating building block (brick)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19830725

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19871111

Ref country code: BE

Effective date: 19871111

REF Corresponds to:

Ref document number: 30756

Country of ref document: AT

Date of ref document: 19871115

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19871130

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3277632

Country of ref document: DE

Date of ref document: 19871217

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: ZUERCHER ZIEGELEIEN

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19880831

Ref country code: CH

Effective date: 19880831

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881121

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19900816

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19900824

Year of fee payment: 9

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19901029

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19910805

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920501

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST