EP2372281A1 - Oven for heat-treating a number of objects - Google Patents

Oven for heat-treating a number of objects Download PDF

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Publication number
EP2372281A1
EP2372281A1 EP10157826A EP10157826A EP2372281A1 EP 2372281 A1 EP2372281 A1 EP 2372281A1 EP 10157826 A EP10157826 A EP 10157826A EP 10157826 A EP10157826 A EP 10157826A EP 2372281 A1 EP2372281 A1 EP 2372281A1
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EP
European Patent Office
Prior art keywords
combustion chambers
heating chamber
oven according
furnace
objects
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
EP10157826A
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German (de)
French (fr)
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EP2372281B1 (en
Inventor
Stefan Mohr
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.)
DRONCO GmbH
Original Assignee
Dronco AG
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
Priority to EP10157826.8A priority Critical patent/EP2372281B1/en
Application filed by Dronco AG filed Critical Dronco AG
Priority to PL10157826T priority patent/PL2372281T3/en
Priority to ES10157826.8T priority patent/ES2437179T3/en
Priority to SI201030442T priority patent/SI2372281T1/en
Priority to US13/635,665 priority patent/US20130209950A2/en
Priority to EP11711077A priority patent/EP2550498A1/en
Priority to CN2011800147871A priority patent/CN102933928A/en
Priority to BR112012024328A priority patent/BR112012024328A2/en
Priority to RU2012138910/02A priority patent/RU2575504C2/en
Priority to PCT/EP2011/054655 priority patent/WO2011117409A1/en
Publication of EP2372281A1 publication Critical patent/EP2372281A1/en
Application granted granted Critical
Publication of EP2372281B1 publication Critical patent/EP2372281B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • F27B17/0016—Chamber type furnaces
    • F27B17/0041—Chamber type furnaces specially adapted for burning bricks or pottery
    • F27B17/005—Chamber type furnaces specially adapted for burning bricks or pottery with cylindrical chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/02—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated of multiple-chamber type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/08—Arrangements of linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/22—Rotary drums; Supports therefor

Definitions

  • the invention relates to a furnace for heat treatment of a plurality of articles. Furthermore, the invention relates to a furnace with a plurality of ovens.
  • the heat treatment of grinding wheels takes several hours at temperatures above 200 ° C. Such a heat treatment causes high energy consumption since not only the grinding wheels but also the parts of the furnace absorb heat during heating. Most of the furnace parts are relatively heavy in the heated area of the furnace and have a high heat capacity.
  • the oven has a vertical combustion chamber, which is equipped from below. This furnace has a relatively high energy consumption due to its structural design.
  • the essence of the invention lies in the fact that the supporting function in the furnace is taken over exclusively by the support frame.
  • the heating chamber and the combustion chambers can be designed to be particularly thin-walled. This causes a low heat capacity of the heating chamber and the combustion chambers, so that the heating chamber and the combustion chambers absorb relatively little heat during operation, resulting in a significant energy saving.
  • the at least one heating element can be arranged within the heating chamber and / or the heating chamber upstream and / or downstream. Alternatively or additionally, the heating element or elements can also be arranged in the combustion chambers or in the region of the covering hoods.
  • the support framework is thermally decoupled from the heating chamber and from the combustion chambers. This leads to a further significant energy savings, since greatly reduced thermal bridges exist between the support frame on the one hand and the heating chamber and the combustion chambers on the other.
  • the heating chamber and the combustion chambers can be fastened to the support frame at least indirectly via a plurality of thermal insulation elements.
  • the thermal insulation elements are made of a high temperature insulating plastic.
  • the walls of the heating chamber and / or the combustion chambers are at least partially provided with a thermal insulating material. As a result, a heat transfer from the heating chamber and the combustion chambers to the environment is prevented or at least significantly reduced.
  • the heating chamber and the combustion chambers can be made in lightweight construction.
  • the lightweight construction causes a particularly low heat capacity and thus a low heat absorption of the heating chamber and the combustion chambers. This results in a further substantial energy saving.
  • the oven is provided for the heat treatment of disc-shaped objects, in particular grinding wheels.
  • the grinding wheels are stacked in the combustion chambers.
  • the cross section of the combustion chambers is adapted to the contour of the grinding wheels.
  • the oven has a plurality of mandrels for stacking the disc-shaped objects.
  • the mandrels are arranged one above the other in the vertical combustion chambers or side by side in the horizontal combustion chambers or introduced. This allows a predetermined amount of grinding wheels already outside with the mandrel of the oven. Subsequently, the mandrels can be introduced into the combustion chambers of the furnace "in packages" with the grinding wheels.
  • the mandrels are made in lightweight construction.
  • the mandrels have a particularly low heat capacity and thus a low heat absorption. This also contributes to energy savings.
  • the heating element is arranged in an upper region of the vertical heating chamber.
  • the heating element of the heating chamber can be upstream or downstream.
  • the heating element is designed as an electrical heating element.
  • all kinds of heating such as steam, oil, gas, thermal oil carriers, etc. are possible.
  • the geometric shape of the combustion chambers can be adapted to the geometric shape of the objects, so that the distance between the objects and the walls of the combustion chambers is uniform. It can be formed between the objects and the walls of the combustion chambers at least one air duct with a uniform cross-section. As a result, less air masses for the required heat exchange must be moved.
  • the blower can be made relatively small, which also causes an energy saving.
  • the invention relates to a furnace with a plurality of ovens described above.
  • the ovens are arranged side by side and coupled to each other by means of hot air ducts and cold air ducts, so that a direct or indirect heat exchange between cooling and heating ovens is made possible. Again, this is a major contribution to saving energy.
  • Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.
  • FIG. 1 Figure 3 is a perspective view of a furnace according to a preferred embodiment of the invention.
  • the oven is intended for heat treating a variety of items.
  • the oven comprises a support frame 10, which is formed as a three-dimensional frame.
  • the support frame 10 is substantially in the form of a cage.
  • the oven further includes a heating chamber 12 located within the support 10 in the center thereof.
  • the heating chamber 12 is elongated and vertically arranged. In this example, the heating chamber 12 has a round cross section.
  • the heating chamber 12 around a plurality of combustion chambers 14 is arranged.
  • the combustion chambers 14 are also elongated and arranged vertically. In this example, eight combustion chambers 14 are evenly distributed around the heating chamber 12.
  • the combustion chambers 14 have a round cross-section.
  • a base plate 16 At the lower ends of the heating chamber 12 and the combustion chambers 14 is a base plate 16.
  • the base plate 16 is fixed to a lower horizontal frame 18 of the support frame 10. Between the base plate 16 and the lower horizontal frame 18 are thermal insulation elements 26th
  • the thermal insulating members 26 are made of a material having low thermal conductivity.
  • the base plate 16 is thus thermally decoupled from the lower horizontal frame 18.
  • the thermal insulation elements 26 are made of a high temperature insulating plastic.
  • the upper ends of the heating chamber 12 and the combustion chambers 14 are covered by a cover 22.
  • the cover 22 is attached to an upper horizontal frame 20 of the support frame 10. Between the cover 22 and the upper horizontal frame 20 are also thermal insulation elements 26, so that the cover 22 is thermally decoupled from the upper horizontal frame 20.
  • the upper ends of the heating chamber 12 and the combustion chambers 14 are interconnected.
  • a heating element 28 In this embodiment, this is an electric heating element, which is arranged in the upper region of the heating chamber 12.
  • the combustion chambers 14 are provided for receiving the plurality of articles subjected to the heat treatment.
  • a blower 24 is arranged below the base plate 16.
  • it is a radial fan whose axis of rotation is arranged vertically.
  • the fan 24 conveys the heated air from the heating element 28 from the heating chamber 12, so that the air moves in the heating chamber 12 from top to bottom. Subsequently, the heated air is blown from the fan 24 into the combustion chambers 14, so that the air in the combustion chambers 14 moves from bottom to top. In the combustion chambers 14, the heat treatment of the objects takes place. Under the cover 22, the air from the upper combustion chambers 14 returns to the heating chamber 12.
  • the support frame 10 forms the supporting part of the furnace.
  • the heating chamber 12, the combustion chambers 14 and the cover 22 can be made in lightweight construction, since they need not have any supporting functions.
  • the lightweight design allows a low heat capacity, so that the heating chamber 12, the combustion chambers 14 and the cover 22 absorb little heat.
  • the heating chamber 12 and the combustion chambers 14 are made of a special flexible tube having a wall thickness of 0.13 mm. This is possible because the heating chamber 12 and the combustion chambers 14 have no supporting function.
  • the support frame 10 with the lower horizontal frame 18 due to the thermal insulation elements 26 of the heating chamber 12, the combustion chambers 14, the base plate 16 and the cover 22 thermally decoupled, so that the support frame 10 with the lower horizontal frame 18 receives little or no heat , This leads to a significant energy saving.
  • the furnace is provided for heat-treating resin-based abrasive wheels.
  • the grinding wheels are made with phenolic resin. By the heat treatment the grinding wheels are hardened.
  • the round grinding wheels are stacked in the combustion chambers 14, which have a round cross-section. The cross section of the combustion chambers 14 is thus adapted to the shape of the grinding wheels to be treated.
  • the heating chamber 12 and the combustion chambers 14 are covered with an insulating material.
  • the insulating material is made for example of rock wool or glass wool and laminated on the outside with an aluminum foil.
  • the insulating material has a thickness of 100 mm to 150 mm. This also contributes to the saving of energy.
  • FIG. 2 shows a top view of the oven with a removed cover 22 according to the preferred embodiment of the invention.
  • a cover plate 30 At the upper ends of the heating chamber 12 and the combustion chambers 14 is a cover plate 30.
  • the cover plate 30 is the same as the cover 22 by means of the thermal insulation elements 26 attached to the upper horizontal frame 20 of the support 10. Thus, the cover plate 30 is thermally decoupled from the support frame 10.
  • the electric heating element 28 is mounted in the upper region of the heating chamber 12.
  • the heating element 28 can be dismantled without great effort for maintenance and repair purposes.
  • the heating chamber 12 has a protective grid 32 for the heating element 28.
  • the combustion chambers 14 each have at the upper end a centering element 34 for the central positioning of the grinding wheels.
  • FIG. 3 is a perspective detail view of a lower portion of the furnace according to the preferred embodiment of the invention shown.
  • FIG. 3 in particular shows the thermal decoupling between the support frame 10 on the one hand and the heating chamber 12 and the combustion chambers 14 on the other.
  • the detail view in particular shows the thermal insulation element 26 which is arranged between the base plate 16 and the lower horizontal frame 18.
  • the thermal insulating member 26 is as L-shaped section formed.
  • the thermal insulating member 26 is made of the high-temperature insulating plastic.
  • FIG. 4 shows a front view of a furnace with multiple furnaces according to the preferred embodiment of the invention.
  • the ovens are arranged side by side.
  • FIG. 4 the arrangement of the heating element 28 in the upper region of the combustion chamber 12 can be seen.
  • the grinding wheels are arranged. A certain number of grinding wheels are first stacked on a mandrel 40. Several such mandrels 40 are inserted from below into the combustion chamber 14. In this example ten mandrels 40 per combustion chamber 14 are provided.
  • FIG. 4 the arrangement of the blower 24.
  • a motor 42 for driving the fan 24 is located below the blower 24th
  • the adjacent furnaces are coupled to each other by means of a hot air duct 36 and a cold air duct 38.
  • This warm air is transported from a just-cooling oven in a straight oven to be heated. This also contributes to energy savings.
  • FIG. 5 shows a top view of the oven with multiple furnaces according to the preferred embodiment of the invention.
  • the kiln plant has five ovens.
  • FIG. 5 illustrates in particular the arrangement of the hot air ducts 36 and the cold air ducts 38.
  • FIG. 6 Figure 3 is a perspective view of a mandrel 40 for the oven according to the preferred embodiment of the invention.
  • the mandrel 40 is provided for stacking a predetermined amount of grinding wheels.
  • the mandrel 40 includes a vertical tube 44 and a round base 46.
  • the base 46 is composed of an outer ring and a plurality of spokes.
  • the heat capacity of the mandrel 40 is therefore low. When heating the mandrel 40 takes up little heat, which also contributes to energy savings.
  • centering elements 34 are provided for the central positioning of the mandrels 40 within the combustion chambers 14.

Abstract

The furnace has a supporting framework (10), which is formed as a three-dimensional frame, an elongated heating chamber (12), which is arranged vertically or horizontally in a central region of the supporting framework, and multiple elongated combustion chambers (14), which are arranged vertically or horizontally within the supporting framework. A heating element is assigned to the heating chamber. A blower produces an air stream from the heating chamber to the combustion chambers. An independent claim is also included for a furnace plant.

Description

Die Erfindung betrifft einen Ofen zur Wärmebehandlung einer Vielzahl von Gegenständen. Weiterhin betrifft die Erfindung eine Ofenanlage mit einer Vielzahl von Öfen.The invention relates to a furnace for heat treatment of a plurality of articles. Furthermore, the invention relates to a furnace with a plurality of ovens.

Zahlreiche Gegenstände müssen während ihrer Herstellung einer Wärmebehandlung unterzogen werden. Dies betrifft auch die Herstellung von Schleifscheiben. So ist bei der Herstellung von Schleifscheiben auf Harzbasis eine Wärmebehandlung zum Härten erforderlich. Beispielsweise sind solche Schleifscheiben mit Phenolharzbindung hergestellt.Many items must undergo a heat treatment during their manufacture. This also applies to the production of grinding wheels. Thus, in the manufacture of resin-based abrasive wheels, a heat treatment is required for curing. For example, such grinding wheels are made with phenolic resin bond.

Die Wärmebehandlung von Schleifscheiben dauert mehrere Stunden bei Temperaturen von über 200 °C. Eine solche Wärmebehandlung verursacht einen hohen Energieverbrauch, da nicht nur die Schleifscheiben, sondern auch die Teile des Ofens beim Aufheizen Wärme aufnehmen. Meist sind die Ofenteile im beheizten Bereich des Ofens relativ schwer und haben eine hohe Wärmekapazität.The heat treatment of grinding wheels takes several hours at temperatures above 200 ° C. Such a heat treatment causes high energy consumption since not only the grinding wheels but also the parts of the furnace absorb heat during heating. Most of the furnace parts are relatively heavy in the heated area of the furnace and have a high heat capacity.

Aus der GB 120,633 ist ein Ofen zur Wärmebehandlung von Gegenständen bekannt, der eine zentrale Heizkammer aufweist, die von mehreren Brennkammern umgeben ist. Aufgrund der Wärmeaufnahme von Heizkammer und Brennkammern ist der Energieverbrauch relativ hoch.From the GB 120,633 For example, there is known an article heat treatment furnace having a central heating chamber surrounded by a plurality of combustion chambers. Due to the heat absorption of the heating chamber and combustion chambers, the energy consumption is relatively high.

In der DE 1 583 478 A1 ist ein Ofen zur Wärmebehandlung von Schleifscheiben beschrieben. Der Ofen weist eine senkrechte Brennkammer auf, die von unten bestückt wird. Auch dieser Ofen hat aufgrund seines konstruktiven Aufbaus einen relativ hohen Energieverbrauch.In the DE 1 583 478 A1 is described a furnace for heat treatment of grinding wheels. The oven has a vertical combustion chamber, which is equipped from below. This furnace has a relatively high energy consumption due to its structural design.

Es ist Aufgabe der Erfindung, einen Ofen zur Wärmebehandlung einer Vielzahl von Gegenständen bereitzustellen, dessen konstruktiver Aufbau zur Einsparung von Energie beiträgt.It is an object of the invention to provide a furnace for heat treatment of a variety of objects, the structural design contributes to the conservation of energy.

Diese Aufgabe wird durch den Gegenstand gemäß Patentanspruch 1 gelöst.This object is achieved by the subject matter of claim 1.

Der erfindungsgemäße Ofen zur Wärmebehandlung einer Vielzahl von Gegenständen umfasst:

  • ein Tragegerüst, das als ein dreidimensionaler Rahmen ausgebildet ist,
  • eine langgestreckte Heizkammer, die vertikal oder horizontal in einem zentralen Bereich des Tragegerüsts angeordnet ist, und
  • eine Mehrzahl von langgestreckten Brennkammern, die vertikal oder horizontal innerhalb des Tragegerüsts angeordnet sind,
  • wenigstens ein Heizelement, das der Heizkammer zugeordnet ist,
  • wenigstens ein Gebläse zum Erzeugen eines Luftstroms von der Heizkammer zu den Brennkammern, wobei
  • die Brennkammern zum Aufnehmen der Gegenstände vorgesehen sind, und
  • das Tragegerüst zum Abstützen der Heizkammer und der Brennkammern vorgesehen ist.
The furnace for heat treatment of a plurality of articles according to the invention comprises:
  • a support frame, which is designed as a three-dimensional frame,
  • an elongated heating chamber, which is arranged vertically or horizontally in a central region of the support, and
  • a plurality of elongate combustion chambers arranged vertically or horizontally within the support framework,
  • at least one heating element associated with the heating chamber,
  • at least one fan for generating an air flow from the heating chamber to the combustion chambers, wherein
  • the combustion chambers are provided for receiving the objects, and
  • the support frame is provided for supporting the heating chamber and the combustion chambers.

Der Kern der Erfindung liegt darin, dass die tragende Funktion beim Ofen ausschließlich vom Tragegerüst übernommen wird. Dadurch können die Heizkammer und die Brennkammern besonders dünnwandig ausgebildet sein. Dies bewirkt eine niedrige Wärmekapazität der Heizkammer und der Brennkammern, so dass die Heizkammer und die Brennkammern im Betrieb relativ wenig Wärme aufnehmen, was zu einer wesentlichen Energieeinsparung führt. Das wenigstens eine Heizelement kann innerhalb der Heizkammer angeordnet und/oder der Heizkammer vor- und/oder nachgeschaltet sein. Alternativ oder zusätzlich können das oder die Heizelemente auch in den Brennkammern oder im Bereich der Abdeckhauben angeordnet sein.The essence of the invention lies in the fact that the supporting function in the furnace is taken over exclusively by the support frame. As a result, the heating chamber and the combustion chambers can be designed to be particularly thin-walled. This causes a low heat capacity of the heating chamber and the combustion chambers, so that the heating chamber and the combustion chambers absorb relatively little heat during operation, resulting in a significant energy saving. The at least one heating element can be arranged within the heating chamber and / or the heating chamber upstream and / or downstream. Alternatively or additionally, the heating element or elements can also be arranged in the combustion chambers or in the region of the covering hoods.

Bei der bevorzugten Ausführungsform der Erfindung ist das Tragegerüst von der Heizkammer und von den Brennkammern thermisch entkoppelt. Dies führt zu einer weiteren wesentlichen Energieeinsparung, da stark reduzierte Wärmebrücken zwischen dem Tragegerüst einerseits und der Heizkammer und den Brennkammern andererseits bestehen.In the preferred embodiment of the invention, the support framework is thermally decoupled from the heating chamber and from the combustion chambers. This leads to a further significant energy savings, since greatly reduced thermal bridges exist between the support frame on the one hand and the heating chamber and the combustion chambers on the other.

Dazu können die Heizkammer und die Brennkammern zumindest indirekt über eine Mehrzahl thermischer Isolierelemente am Tragegerüst befestigt sein. Beispielsweise sind die thermischen Isolierelemente aus einem Hochtemperatur-Isolierkunststoff hergestellt.For this purpose, the heating chamber and the combustion chambers can be fastened to the support frame at least indirectly via a plurality of thermal insulation elements. For example, the thermal insulation elements are made of a high temperature insulating plastic.

Weiterhin kann vorgesehen sein, dass die Wände der Heizkammer und/oder der Brennkammern zumindest teilweise mit einem thermischen Isoliermaterial versehen sind. Dadurch wird eine Wärmeabgabe von der Heizkammer und den Brennkammern an die Umgebung verhindert oder zumindest deutlich reduziert.Furthermore, it can be provided that the walls of the heating chamber and / or the combustion chambers are at least partially provided with a thermal insulating material. As a result, a heat transfer from the heating chamber and the combustion chambers to the environment is prevented or at least significantly reduced.

Insbesondere können die Heizkammer und die Brennkammern in Leichtbauweise hergestellt sein. Die Leichtbauweise bewirkt eine besonders niedrige Wärmekapazität und somit eine geringe Wärmeaufnahme der Heizkammer und der Brennkammern. Dies ergibt eine weitere wesentliche Energieeinsparung.In particular, the heating chamber and the combustion chambers can be made in lightweight construction. The lightweight construction causes a particularly low heat capacity and thus a low heat absorption of the heating chamber and the combustion chambers. This results in a further substantial energy saving.

Bei der bevorzugten Ausführungsform der Erfindung ist der Ofen zur Wärmebehandlung von scheibenförmigen Gegenständen, insbesondere von Schleifscheiben vorgesehen. Dabei werden die Schleifscheiben in den Brennkammern gestapelt. Vorzugsweise ist der Querschnitt der Brennkammern an die Kontur der Schleifscheiben angepasst.In the preferred embodiment of the invention, the oven is provided for the heat treatment of disc-shaped objects, in particular grinding wheels. The grinding wheels are stacked in the combustion chambers. Preferably, the cross section of the combustion chambers is adapted to the contour of the grinding wheels.

Insbesondere ist vorgesehen, dass der Ofen eine Vielzahl Dorne zum Stapeln der scheibenförmigen Gegenstände aufweist. Die Dorne sind übereinander in den vertikalen Brennkammern bzw. nebeneinander in den horizontalen Brennkammern angeordnet oder einbringbar. Damit kann mit dem Dorn eine vorbestimmte Menge von Schleifscheiben bereits außerhalb des Ofens zusammengefügt werden. Anschließend können die Dorne mit den Schleifscheiben "paketweise" in die Brennkammern des Ofens eingebracht werden.In particular, it is provided that the oven has a plurality of mandrels for stacking the disc-shaped objects. The mandrels are arranged one above the other in the vertical combustion chambers or side by side in the horizontal combustion chambers or introduced. This allows a predetermined amount of grinding wheels already outside with the mandrel of the oven. Subsequently, the mandrels can be introduced into the combustion chambers of the furnace "in packages" with the grinding wheels.

Vorzugsweise sind die Dorne in Leichtbauweise hergestellt. Dadurch haben auch die Dorne eine besonders niedrige Wärmekapazität und somit eine geringe Wärmeaufnahme. Dies trägt zusätzlich zur Energieeinsparung bei.Preferably, the mandrels are made in lightweight construction. As a result, the mandrels have a particularly low heat capacity and thus a low heat absorption. This also contributes to energy savings.

Beispielsweise ist das Heizelement in einem oberen Bereich der vertikalen Heizkammer angeordnet. Ebenso kann das Heizelement der Heizkammer vor- oder nachgeschaltet sein.For example, the heating element is arranged in an upper region of the vertical heating chamber. Likewise, the heating element of the heating chamber can be upstream or downstream.

Beispielsweise ist das Heizelement als ein elektrisches Heizelement ausgebildet. Grundsätzlich sind jedoch alle Beheizungsarten wie Dampf, Öl, Gas, Thermoölträger usw. möglich.For example, the heating element is designed as an electrical heating element. In principle, however, all kinds of heating such as steam, oil, gas, thermal oil carriers, etc. are possible.

Weiterhin kann die geometrische Form der Brennkammern an die geometrische Form der Gegenstände angepasst sein, so dass der Abstand zwischen den Gegenständen und den Wänden der Brennkammern gleichmäßig ist. Dabei kann zwischen den Gegenständen und den Wänden der Brennkammern wenigstens ein Luftkanal mit gleichmäßigem Querschnitt ausgebildet sein. Dadurch müssen weniger Luftmassen für den erforderlichen Wärmetausch bewegt werden. Dass Gebläse kann verhältnismäßig klein ausgebildet sein, was ebenfalls eine Energieeinsparung bewirkt.Furthermore, the geometric shape of the combustion chambers can be adapted to the geometric shape of the objects, so that the distance between the objects and the walls of the combustion chambers is uniform. It can be formed between the objects and the walls of the combustion chambers at least one air duct with a uniform cross-section. As a result, less air masses for the required heat exchange must be moved. The blower can be made relatively small, which also causes an energy saving.

Weiterhin betrifft die Erfindung eine Ofenanlage mit einer Vielzahl der oben beschriebenen Öfen. Dabei sind die Öfen nebeneinander angeordnet und mittels Warmluftkanälen und Kaltluftkanälen miteinander gekoppelt, so dass ein direkter oder indirekter Wärmetausch zwischen abkühlenden und aufheizenden Öfen ermöglicht wird. Auch dies ist ein wesentlicher Beitrag zur Einsparung von Energie.
Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.Furthermore, the invention relates to a furnace with a plurality of ovens described above. The ovens are arranged side by side and coupled to each other by means of hot air ducts and cold air ducts, so that a direct or indirect heat exchange between cooling and heating ovens is made possible. Again, this is a major contribution to saving energy.
Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.

Weitere Merkmale, besondere Ausführungsformen und Vorteile sind Gegenstand der Unteransprüche.Other features, particular embodiments and advantages are the subject of the dependent claims.

Eine bevorzugte Ausführungsform der Erfindung wird nachstehend unter Bezugnahme auf die beigefügten Zeichnungen näher erläutert. Es zeigen jeweils in einer schematischen Darstellung:

FIG 1
eine Perspektivansicht eines Ofens gemäß einer bevorzugten Ausführungsform der Erfindung,
FIG 2
eine Draufsicht des Ofens mit einer abgenommenen Abdeckhaube gemäß der bevorzugten Ausführungsform der Erfindung,
FIG 3
eine perspektivische Detailansicht eines unteren Bereichs des Ofens gemäß der bevorzugten Ausführungsform der Erfindung,
FIG 4
eine Vorderansicht einer Ofenanlage mit mehreren Öfen gemäß der bevorzugten Ausführungsform der Erfindung, und
FIG 5
eine Draufsicht der Ofenanlage mit mehreren Öfen gemäß der bevorzugten Ausführungsform der Erfindung, und
FIG 6
eine Perspektivansicht eines Dorns für den Ofen gemäß der bevorzugten Ausführungsform der Erfindung.
A preferred embodiment of the invention will be explained below with reference to the accompanying drawings. Each shows in a schematic representation:
FIG. 1
a perspective view of a furnace according to a preferred embodiment of the invention,
FIG. 2
a top view of the oven with a removed cover according to the preferred embodiment of the invention,
FIG. 3
a detailed perspective view of a lower portion of the furnace according to the preferred embodiment of the invention,
FIG. 4
a front view of a furnace with multiple furnaces according to the preferred embodiment of the invention, and
FIG. 5
a top view of the oven with multiple furnaces according to the preferred embodiment of the invention, and
FIG. 6
a perspective view of a mandrel for the oven according to the preferred embodiment of the invention.

In FIG 1 ist eine Perspektivansicht eines Ofens gemäß einer bevorzugten Ausführungsform der Erfindung dargestellt. Der Ofen ist zur Wärmebehandlung einer Vielzahl von Gegenständen vorgesehen.In FIG. 1 Figure 3 is a perspective view of a furnace according to a preferred embodiment of the invention. The oven is intended for heat treating a variety of items.

Der Ofen umfasst ein Tragegerüst 10, das als dreidimensionaler Rahmen ausgebildet ist. Das Tragegerüst 10 hat im Wesentlichen die Form eines Käfigs. Der Ofen umfasst weiterhin eine Heizkammer 12, die sich innerhalb des Tragegerüsts 10 in dessen Zentrum befindet. Die Heizkammer 12 ist lang gestreckt ausgebildet und vertikal angeordnet. In diesem Beispiel hat die Heizkammer 12 einen runden Querschnitt.The oven comprises a support frame 10, which is formed as a three-dimensional frame. The support frame 10 is substantially in the form of a cage. The oven further includes a heating chamber 12 located within the support 10 in the center thereof. The heating chamber 12 is elongated and vertically arranged. In this example, the heating chamber 12 has a round cross section.

Um die Heizkammer 12 herum ist eine Vielzahl von Brennkammern 14 angeordnet. Die Brennkammern 14 sind ebenfalls lang gestreckt ausgebildet und vertikal angeordnet. In diesem Beispiel sind acht Brennkammern 14 gleichmäßig um die Heizkammer 12 herum verteilt. Auch die Brennkammern 14 haben einen runden Querschnitt.Around the heating chamber 12 around a plurality of combustion chambers 14 is arranged. The combustion chambers 14 are also elongated and arranged vertically. In this example, eight combustion chambers 14 are evenly distributed around the heating chamber 12. The combustion chambers 14 have a round cross-section.

An den unteren Enden der Heizkammer 12 und der Brennkammern 14 befindet sich eine Grundplatte 16. Die Grundplatte 16 ist an einem unteren Horizontalrahmen 18 des Tragegerüsts 10 befestigt. Zwischen der Grundplatte 16 und dem unteren Horizontalrahmen 18 befinden sich thermische Isolierelemente 26.At the lower ends of the heating chamber 12 and the combustion chambers 14 is a base plate 16. The base plate 16 is fixed to a lower horizontal frame 18 of the support frame 10. Between the base plate 16 and the lower horizontal frame 18 are thermal insulation elements 26th

Die thermischen Isolierelemente 26 sind aus einem Material mit niedriger Wärmeleitfähigkeit hergestellt. Die Grundplatte 16 ist somit vom unteren Horizontalrahmen 18 thermisch entkoppelt. Vorzugsweise sind die thermischen Isolierelemente 26 aus einem Hochtemperatur-Isolierkunststoff hergestellt.The thermal insulating members 26 are made of a material having low thermal conductivity. The base plate 16 is thus thermally decoupled from the lower horizontal frame 18. Preferably, the thermal insulation elements 26 are made of a high temperature insulating plastic.

Die oberen Enden der Heizkammer 12 und der Brennkammern 14 sind von einer Abdeckhaube 22 bedeckt. Die Abdeckhaube 22 ist an einem oberen Horizontalrahmen 20 des Tragegerüsts 10 befestigt. Zwischen der Abdeckhaube 22 und dem oberen Horizontalrahmen 20 befinden sich ebenfalls thermische Isolierelemente 26, so dass die Abdeckhaube 22 vom oberen Horizontalrahmen 20 thermisch entkoppelt ist.The upper ends of the heating chamber 12 and the combustion chambers 14 are covered by a cover 22. The cover 22 is attached to an upper horizontal frame 20 of the support frame 10. Between the cover 22 and the upper horizontal frame 20 are also thermal insulation elements 26, so that the cover 22 is thermally decoupled from the upper horizontal frame 20.

Über einen Hohlraum unter der Abdeckhaube 22 sind die oberen Enden der Heizkammer 12 und der Brennkammern 14 miteinander verbunden. In der Heizkammer 12 befindet sich ein Heizelement 28. In dieser Ausführungsform handelt es sich dabei um ein elektrisches Heizelement, das im oberen Bereich der Heizkammer 12 angeordnet ist. Die Brennkammern 14 sind zur Aufnahme der Vielzahl von Gegenständen vorgesehen, die der Wärmebehandlung unterzogen werden.Via a cavity under the cover 22, the upper ends of the heating chamber 12 and the combustion chambers 14 are interconnected. In the heating chamber 12 is a heating element 28. In this embodiment, this is an electric heating element, which is arranged in the upper region of the heating chamber 12. The combustion chambers 14 are provided for receiving the plurality of articles subjected to the heat treatment.

Unterhalb der Grundplatte 16 ist eine Gebläse 24 angeordnet. In diesem Beispiel handelt es sich um ein Radialgebläse, dessen Rotationsachse vertikal angeordnet ist. Das Gebläse 24 fördert die vom Heizelement 28 erwärmte Luft aus der Heizkammer 12, so dass sich die Luft in der Heizkammer 12 von oben nach unten bewegt. Anschließend wird die erwärmte Luft vom Gebläse 24 in die Brennkammern 14 geblasen, so dass sich die Luft in den Brennkammern 14 von unten nach oben bewegt. In den Brennkammern 14 erfolgt die Wärmebehandlung der Gegenstände. Unter der Abdeckhaube 22 gelangt die Luft von den oberen Brennkammern 14 wieder in die Heizkammer 12.Below the base plate 16, a blower 24 is arranged. In this example, it is a radial fan whose axis of rotation is arranged vertically. The fan 24 conveys the heated air from the heating element 28 from the heating chamber 12, so that the air moves in the heating chamber 12 from top to bottom. Subsequently, the heated air is blown from the fan 24 into the combustion chambers 14, so that the air in the combustion chambers 14 moves from bottom to top. In the combustion chambers 14, the heat treatment of the objects takes place. Under the cover 22, the air from the upper combustion chambers 14 returns to the heating chamber 12.

Das Tragegerüst 10 bildet das tragende Teil des Ofens. Dadurch können die Heizkammer 12, die Brennkammern 14 und die Abdeckhaube 22 in Leichtbauweise hergestellt sein, da diese keine tragenden Funktionen haben müssen. Die Leichtbauweise ermöglicht eine geringe Wärmekapazität, so dass die Heizkammer 12, die Brennkammern 14 und die Abdeckhaube 22 nur wenig Wärme aufnehmen. In diesem Beispiel sind die Heizkammer 12 und die Brennkammern 14 aus einem speziellen Flexrohr hergestellt, das eine Wanddicke vom 0,13 mm aufweist. Dies ist möglich, da die Heizkammer 12 und die Brennkammern 14 keine tragende Funktion haben.The support frame 10 forms the supporting part of the furnace. As a result, the heating chamber 12, the combustion chambers 14 and the cover 22 can be made in lightweight construction, since they need not have any supporting functions. The lightweight design allows a low heat capacity, so that the heating chamber 12, the combustion chambers 14 and the cover 22 absorb little heat. In this example, the heating chamber 12 and the combustion chambers 14 are made of a special flexible tube having a wall thickness of 0.13 mm. This is possible because the heating chamber 12 and the combustion chambers 14 have no supporting function.

Außerdem ist das Tragegerüst 10 mit dem unteren Horizontalrahmen 18 aufgrund der thermischen Isolierelemente 26 von der Heizkammer 12, den Brennkammern 14, der Grundplatte 16 und der Abdeckhaube 22 thermisch entkoppelt, so dass das Tragegerüst 10 mit dem unteren Horizontalrahmen 18 keine oder nur wenig Wärme aufnimmt. Dies führt zu einer deutlichen Energieeinsparung.In addition, the support frame 10 with the lower horizontal frame 18 due to the thermal insulation elements 26 of the heating chamber 12, the combustion chambers 14, the base plate 16 and the cover 22 thermally decoupled, so that the support frame 10 with the lower horizontal frame 18 receives little or no heat , This leads to a significant energy saving.

Bei dieser konkreten Ausführungsform ist der Ofen zur Wärmebehandlung von Schleifscheiben auf Harzbasis vorgesehen. Beispielsweise sind die Schleifscheiben mit Phenolharz hergestellt. Durch die Wärmebehandlung werden die Schleifscheiben gehärtet. Dabei werden die runden Schleifscheiben in den Brennkammern 14, die einen runden Querschnitt aufweisen, gestapelt. Der Querschnitt der Brennkammern 14 ist somit an die Form der zu behandelnden Schleifscheiben angepasst.In this particular embodiment, the furnace is provided for heat-treating resin-based abrasive wheels. For example, the grinding wheels are made with phenolic resin. By the heat treatment the grinding wheels are hardened. In this case, the round grinding wheels are stacked in the combustion chambers 14, which have a round cross-section. The cross section of the combustion chambers 14 is thus adapted to the shape of the grinding wheels to be treated.

Schließlich sind die Heizkammer 12 und die Brennkammern 14 mit einem Isoliermaterial verkleidet. Das Isoliermaterial ist beispielsweise aus Steinwolle oder Glaswolle hergestellt und an der Außenseite mit einer Aluminiumfolie kaschiert. Bei dieser Ausführungsform hat das Isoliermaterial eine Dicke von 100 mm bis 150 mm. Auch dies trägt zur Einsparung von Energie bei.Finally, the heating chamber 12 and the combustion chambers 14 are covered with an insulating material. The insulating material is made for example of rock wool or glass wool and laminated on the outside with an aluminum foil. In this embodiment, the insulating material has a thickness of 100 mm to 150 mm. This also contributes to the saving of energy.

FIG 2 zeigt eine Draufsicht des Ofens mit einer abgenommenen Abdeckhaube 22 gemäß der bevorzugten Ausführungsform der Erfindung. An den oberen Enden der Heizkammer 12 und der Brennkammern 14 befindet sich eine Deckplatte 30. Die Deckplatte 30 ist ebenso wie die Abdeckhaube 22 mittels der thermischen Isolierelemente 26 am oberen Horizontalrahmen 20 des Tragegerüsts 10 befestigt. Somit ist auch die Deckplatte 30 vom Tragegerüst 10 thermisch entkoppelt. FIG. 2 shows a top view of the oven with a removed cover 22 according to the preferred embodiment of the invention. At the upper ends of the heating chamber 12 and the combustion chambers 14 is a cover plate 30. The cover plate 30 is the same as the cover 22 by means of the thermal insulation elements 26 attached to the upper horizontal frame 20 of the support 10. Thus, the cover plate 30 is thermally decoupled from the support frame 10.

Im oberen Bereich der Heizkammer 12 ist das elektrische Heizelement 28 eingehängt. Das Heizelement 28 kann ohne großen Aufwand zu Wartungs- und Reparaturzwecken demontiert werden. Am oberen Ende weist die Heizkammer 12 ein Schutzgitter 32 für das Heizelement 28 auf. Die Brennkammern 14 weisen am oberen Ende jeweils ein Zentrierelement 34 für die zentrale Positionierung der Schleifscheiben auf.In the upper region of the heating chamber 12, the electric heating element 28 is mounted. The heating element 28 can be dismantled without great effort for maintenance and repair purposes. At the upper end, the heating chamber 12 has a protective grid 32 for the heating element 28. The combustion chambers 14 each have at the upper end a centering element 34 for the central positioning of the grinding wheels.

In FIG 3 ist eine perspektivische Detailansicht eines unteren Bereichs des Ofens gemäß der bevorzugten Ausführungsform der Erfindung dargestellt. FIG 3 zeigt insbesondere die thermische Entkopplung zwischen dem Tragegerüst 10 einerseits und der Heizkammer 12 und den Brennkammern 14 andererseits. Die Detailansicht zeigt insbesondere das thermische Isolierelement 26, das zwischen der Grundplatte 16 und dem unteren Horizontalrahmen 18 angeordnet ist. Das thermische Isolierelement 26 ist als L-Profilabschnitt ausgebildet. Das thermische Isolierelement 26 ist aus dem Hochtemperatur-Isolierkunststoff hergestellt.In FIG. 3 is a perspective detail view of a lower portion of the furnace according to the preferred embodiment of the invention shown. FIG. 3 in particular shows the thermal decoupling between the support frame 10 on the one hand and the heating chamber 12 and the combustion chambers 14 on the other. The detail view in particular shows the thermal insulation element 26 which is arranged between the base plate 16 and the lower horizontal frame 18. The thermal insulating member 26 is as L-shaped section formed. The thermal insulating member 26 is made of the high-temperature insulating plastic.

FIG 4 zeigt eine Vorderansicht einer Ofenanlage mit mehreren Öfen gemäß der bevorzugten Ausführungsform der Erfindung. Bei der Ofenanlage sind die Öfen nebeneinander angeordnet. FIG. 4 shows a front view of a furnace with multiple furnaces according to the preferred embodiment of the invention. In the furnace system, the ovens are arranged side by side.

In FIG 4 ist die Anordnung des Heizelements 28 im oberen Bereich der Brennkammer 12 erkennbar. Innerhalb der Brennkammern 14 sind die Schleifscheiben angeordnet. Eine bestimmte Anzahl von Schleifscheiben wird zunächst auf einem Dorn 40 gestapelt. Mehrere solche Dorne 40 werden von unten in die Brennkammer 14 eingeführt. In diesem Beispiel sind zehn Dorne 40 pro Brennkammer 14 vorgesehen.In FIG. 4 the arrangement of the heating element 28 in the upper region of the combustion chamber 12 can be seen. Within the combustion chambers 14, the grinding wheels are arranged. A certain number of grinding wheels are first stacked on a mandrel 40. Several such mandrels 40 are inserted from below into the combustion chamber 14. In this example ten mandrels 40 per combustion chamber 14 are provided.

Weiterhin verdeutlicht FIG 4 die Anordnung des Gebläses 24. Ein Motor 42 zum Antreiben des Gebläses 24 befindet sich unterhalb des Gebläses 24.Further clarified FIG. 4 the arrangement of the blower 24. A motor 42 for driving the fan 24 is located below the blower 24th

Bei der Ofenanlage sind die benachbarten Öfen untereinander mittels eines Warmluftkanals 36 und eines Kaltluftkanals 38 gekoppelt. Dabei wird warme Luft aus einen sich gerade abkühlenden Ofen in eine geraden aufzuheizenden Ofen befördert. Auch dies trägt zu einer Energieeinsparung bei.In the furnace, the adjacent furnaces are coupled to each other by means of a hot air duct 36 and a cold air duct 38. This warm air is transported from a just-cooling oven in a straight oven to be heated. This also contributes to energy savings.

FIG 5 zeigt eine Draufsicht der Ofenanlage mit mehreren Öfen gemäß der bevorzugten Ausführungsform der Erfindung. In diesem Beispiel umfasst die Ofenanlage fünf Öfen. FIG 5 verdeutlicht insbesondere die Anordnung der Warmluftkanäle 36 und der Kaltluftkanäle 38. FIG. 5 shows a top view of the oven with multiple furnaces according to the preferred embodiment of the invention. In this example, the kiln plant has five ovens. FIG. 5 illustrates in particular the arrangement of the hot air ducts 36 and the cold air ducts 38.

In FIG 6 ist eine Perspektivansicht eines Dorns 40 für den Ofen gemäß der bevorzugten Ausführungsform der Erfindung dargestellt. Der Dorn 40 ist zum Stapeln einer vorbestimmten Menge von Schleifscheiben vorgesehen.In FIG. 6 Figure 3 is a perspective view of a mandrel 40 for the oven according to the preferred embodiment of the invention. The mandrel 40 is provided for stacking a predetermined amount of grinding wheels.

Der Dorn 40 umfasst ein vertikales Rohr 44 und ein rundes Basisteil 46. Das Basisteil 46 setzt sich aus einem äußeren Ring und einer Mehrzahl Speichen zusammen. Somit ist auch der Dorn 40 in einer Leichtbauweise hergestellt. Die Wärmekapazität des Dorns 40 ist daher gering. Beim Aufheizen nimmt der Dorn 40 nur wenig Wärme auf, was ebenfalls zu einer Energieeinsparung beträgt.The mandrel 40 includes a vertical tube 44 and a round base 46. The base 46 is composed of an outer ring and a plurality of spokes. Thus, the mandrel 40 is made in a lightweight construction. The heat capacity of the mandrel 40 is therefore low. When heating the mandrel 40 takes up little heat, which also contributes to energy savings.

Die in FIG 2 dargestellten Zentrierelemente 34 sind für die zentrale Positionierung der Dorne 40 innerhalb der Brennkammern 14 vorgesehen.In the FIG. 2 shown centering elements 34 are provided for the central positioning of the mandrels 40 within the combustion chambers 14.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Tragegerüstsupporting framework
1212
Heizkammerheating chamber
1414
Brennkammercombustion chamber
1616
Grundplattebaseplate
1818
unterer Horizontalrahmenlower horizontal frame
2020
oberer HorizontalrahmenUpper horizontal frame
2222
Abdeckhaubecover
2424
Gebläsefan
2626
thermisches Isolierelementthermal insulating element
2828
Heizelementheating element
3030
Deckplattecover plate
3232
Schutzgitterguard
3434
Zentrierelementcentering
3636
WarmluftkanalWarm air duct
3838
KaltluftkanalCold air duct
4040
Dornmandrel
4242
Motorengine
4444
Rohrpipe
4646
Basisteilbase

Claims (14)

Ofen zur Wärmebehandlung einer Vielzahl von Gegenständen, der Folgendes umfasst: - ein Tragegerüst (10), das als ein dreidimensionaler Rahmen ausgebildet ist, - eine langgestreckte Heizkammer (12), die vertikal oder horizontal in einem zentralen Bereich des Tragegerüsts (10) angeordnet ist, und - eine Mehrzahl von langgestreckten Brennkammern (14), die vertikal oder horizontal innerhalb des Tragegerüsts (10) angeordnet sind, - wenigstens ein Heizelement (28), das der Heizkammer (12) zugeordnet ist, - wenigstens ein Gebläse (24) zum Erzeugen eines Luftstroms von der Heizkammer (12) zu den Brennkammern (14), wobei - die Brennkammern (14) zum Aufnehmen der Gegenstände vorgesehen sind, und - das Tragegerüst (10) zum Abstützen der Heizkammer (12) und der Brennkammern (14) vorgesehen ist. A furnace for heat treating a plurality of articles, comprising: a support frame (10), which is designed as a three-dimensional frame, - An elongated heating chamber (12) which is arranged vertically or horizontally in a central region of the support frame (10), and a plurality of elongated combustion chambers (14) arranged vertically or horizontally within the support framework (10), at least one heating element (28) associated with the heating chamber (12), - At least one fan (24) for generating an air flow from the heating chamber (12) to the combustion chambers (14), wherein - The combustion chambers (14) are provided for receiving the objects, and - The support frame (10) for supporting the heating chamber (12) and the combustion chambers (14) is provided. Ofen nach Anspruch 1,
dadurch gekennzeichnet, dass
das Tragegerüst (10) von der Heizkammer (12) und von den Brennkammern (14) thermisch entkoppelt ist.Oven according to claim 1,
characterized in that
the support frame (10) is thermally decoupled from the heating chamber (12) and from the combustion chambers (14). Ofen nach Anspruch 2,
dadurch gekennzeichnet, dass
die Heizkammer (12) und die Brennkammern (14) zumindest indirekt über eine Mehrzahl thermischer Isolierelemente (26) am Tragegerüst (10) befestigt sind.Oven according to claim 2,
characterized in that
the heating chamber (12) and the combustion chambers (14) are fastened to the support frame (10) at least indirectly via a plurality of thermal insulation elements (26). Ofen nach Anspruch 3,
dadurch gekennzeichnet, dass
die thermischen Isolierelemente (26) aus einem Hochtemperatur-Isolierkunststoff hergestellt sind.Oven according to claim 3,
characterized in that
the thermal insulation elements (26) are made of a high temperature insulating plastic. Ofen nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die Wände der Heizkammer (12) und/oder der Brennkammern (14) zumindest teilweise mit einem thermischen Isoliermaterial versehen sind.Oven according to one or more of the preceding claims,
characterized in that
the walls of the heating chamber (12) and / or the combustion chambers (14) are at least partially provided with a thermal insulating material. Ofen nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die Heizkammer (12) und die Brennkammern (14) in Leichtbauweise hergestellt sind, so dass die Wärmekapazitäten der Heizkammer (12) und der Brennkammern (14) verhältnismäßig gering sind.Oven according to one or more of the preceding claims,
characterized in that
the heating chamber (12) and the combustion chambers (14) are made in lightweight construction, so that the heat capacities of the heating chamber (12) and the combustion chambers (14) are relatively low. Ofen nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
der Ofen zur Wärmebehandlung von scheibenförmigen Gegenständen, insbesondere von Schleifscheiben vorgesehen ist.Oven according to one or more of the preceding claims,
characterized in that
the furnace is provided for the heat treatment of disc-shaped objects, in particular grinding wheels. Ofen nach Anspruch 7,
dadurch gekennzeichnet, dass
der Ofen eine Vielzahl Dorne (40) zum Stapeln der scheibenförmigen Gegenstände aufweist, wobei die Dorne (40) übereinander in den Brennkammern (14) angeordnet oder einbringbar sind.Oven according to claim 7,
characterized in that
the furnace has a plurality of mandrels (40) for stacking the disk-shaped articles, wherein the mandrels (40) are arranged one above the other in the combustion chambers (14) or can be introduced. Ofen nach Anspruch 8,
dadurch gekennzeichnet, dass
die Dorne (40) in Leichtbauweise hergestellt sind.Oven according to claim 8,
characterized in that
the mandrels (40) are made in lightweight construction. Ofen nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
das wenigstens eine Heizelement (16) innerhalb der Heizkammer (12) angeordnet oder der Heizkammer (12) vor- oder nachgeschaltet ist.Oven according to one or more of the preceding claims,
characterized in that
the at least one heating element (16) disposed within the heating chamber (12) or the heating chamber (12) upstream or downstream. Ofen nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
das wenigstens eine Heizelement (16) mit elektrischem Strom, Öl, Gas, Dampf, und/oder Thermoölträger versorgbar ist.Oven according to one or more of the preceding claims,
characterized in that
the at least one heating element (16) can be supplied with electric current, oil, gas, steam, and / or thermal oil carrier. Ofen nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die geometrische Form der Brennkammern (14) an die geometrische Form der Gegenstände angepasst ist, so dass der Abstand zwischen den Gegenständen und den Wänden der Brennkammern (14) gleichmäßig ist.Oven according to one or more of the preceding claims,
characterized in that
the geometric shape of the combustion chambers (14) is adapted to the geometric shape of the objects, so that the distance between the objects and the walls of the combustion chambers (14) is uniform. Ofen nach Anspruch 12,
dadurch gekennzeichnet, dass
zwischen den Gegenständen und den Wänden der Brennkammern (14) wenigstens ein Luftkanal mit gleichmäßigem Querschnitt ausgebildet ist.Oven according to claim 12,
characterized in that
between the objects and the walls of the combustion chambers (14) is formed at least one air channel with a uniform cross-section. Ofenanlage mit einer Vielzahl von Öfen nach einem oder mehreren der vorgehenden Ansprüche,
dadurch gekennzeichnet, dass
die Öfen nebeneinander angeordnet und mittels Warmluftkanälen (36) und Kaltluftkanälen (38) miteinander gekoppelt sind, so dass ein Wärmetausch zwischen abkühlenden und aufheizenden Öfen ermöglicht wird.Furnace having a plurality of furnaces according to one or more of the preceding claims,
characterized in that
the ovens are arranged side by side and coupled to each other by means of hot air ducts (36) and cold air ducts (38), so that a heat exchange between cooling and heating ovens is made possible.
EP10157826.8A 2010-03-25 2010-03-25 Oven for heat-treating a number of objects Active EP2372281B1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
PL10157826T PL2372281T3 (en) 2010-03-25 2010-03-25 Oven for heat-treating a number of objects
ES10157826.8T ES2437179T3 (en) 2010-03-25 2010-03-25 Furnace for heat treatment of various objects
SI201030442T SI2372281T1 (en) 2010-03-25 2010-03-25 Oven for heat-treating a number of objects
EP10157826.8A EP2372281B1 (en) 2010-03-25 2010-03-25 Oven for heat-treating a number of objects
EP11711077A EP2550498A1 (en) 2010-03-25 2011-03-25 Furnace for the heat treatment of a multiplicity of items
CN2011800147871A CN102933928A (en) 2010-03-25 2011-03-25 Furnace for the heat treatment of a multiplicity of items
US13/635,665 US20130209950A2 (en) 2010-03-25 2011-03-25 Oven for heat treatment of a multiplicity of objects
BR112012024328A BR112012024328A2 (en) 2010-03-25 2011-03-25 furnace for heat treatment of a multitude of objects
RU2012138910/02A RU2575504C2 (en) 2010-03-25 2011-03-25 Furnaces for heat processing of objects
PCT/EP2011/054655 WO2011117409A1 (en) 2010-03-25 2011-03-25 Furnace for the heat treatment of a multiplicity of items

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ES (1) ES2437179T3 (en)
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EP3421178A1 (en) * 2017-06-26 2019-01-02 Dronco GmbH Method of manufacturing an abrasive member, in particular rotary abrasive disc and abrasive member, in particular rotary abrasive disc

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US20130017505A1 (en) 2013-01-17
PL2372281T3 (en) 2014-11-28
BR112012024328A2 (en) 2016-05-24
US20130209950A2 (en) 2013-08-15
SI2372281T1 (en) 2014-02-28
WO2011117409A1 (en) 2011-09-29
EP2550498A1 (en) 2013-01-30
RU2012138910A (en) 2014-04-27
ES2437179T3 (en) 2014-01-09
EP2372281B1 (en) 2013-08-28

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