• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a process for producing insulating elements of mineral fibers, the mineral fibers are deposited on a conveyor to obtain a nonwoven fabric, wherein the mineral fibers are provided with a binder, followed by a two-stage compaction, shaping and curing process, wherein the nonwoven fabric in a first Process stage of a pre-compaction and shaping and predrying is in which the binder is only partially dried, wherein portions of the thus pretreated fiber web are placed on each other to obtain a ply package of at least two layers, and the ply package in a second stage of a final compression and Shaping and a final drying is subjected to obtain the insulating element.
    公开号:AT516749A4
    申请号:T424/2015
    申请日:2015-07-02
    公开日:2016-08-15
    发明作者:
    申请人:Destra Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a method for the production of insulating elements made of mineral fibers, in which the mineral fibers are deposited on a conveyor to obtain a nonwoven fabric, wherein the mineral fibers are provided with a binder, and the nonwoven fabric is subjected to a shaping and curing process, wherein the Formed fiber web into a fiber web with a defined thickness and the binder is dried and cured.
    The invention further relates to a device for carrying out such a method.
    Under mineral fibers are understood in the context of the invention, in particular stone and glass fibers, from which stone or glass wool is produced. To produce the mineral fibers, a silicate melt is produced in a melting aggregate and defibered into microfine fibers in a defibering device. Binders and / or impregnating agents are added to the fibers and the fibers are deposited on a conveyor as fleece. The wetted with binders mineral fibers form on the conveyor a mineral fiber fleece, which is processed in downstream thermal and / or mechanical devices in a conventional manner to produce insulation in the form of sheets, plates, moldings or the like.
    In the prior art, the Endlosvlies for this purpose is stored with the help of a pendulum suspended conveyor across another conveyor, which allows the production of one of a plurality of obliquely superposed individual layers existing endless fiber web. In an alternative procedure, the
    Nonwoven fabric unfolded by a moving up and down conveyor and placed endlessly and looped on a second conveyor. This creates individual layers that are pressed together in a horizontal direction and compressed.
    The fibrous web thus obtained is finally fixed in a hardening oven. In the hardening furnace, the endless fibrous web is compressed and heated between two pressure belts or between rollers. The heat energy heats the fibrous web with the binders contained therein so that moisture present in the fibrous web is expelled and the binder hardens. Finally, the fiber mat obtained in this way is trimmed at its lateral edges and cut into Dämmmaterialelemente the desired size.
    Although the production method described above has proven itself, it is very inflexible in view of new requirements for insulation elements. For example, the insulating elements can only be produced with a homogeneous density. Under certain circumstances, however, an optimization of the thermal insulation properties in relation to the mass of the Dämmelements would be desirable in that the insulating element in the near-surface regions has a different density than in a core region.
    The present invention therefore aims to develop a method of the type mentioned above and a device to the effect that the above requirements can be taken into account.
    To achieve this object, the invention in a method of the type mentioned essentially consists in that the shaping and curing process takes place in at least two stages, wherein the nonwoven fabric is subjected in a first stage of a precompression and shaping and a predrying in which the Binder is only partially dried, wherein portions of the thus pretreated fiber web are placed on each other to obtain a ply pack of at least two layers, and wherein the ply pack in a second process stage of a final compaction and shaping and a final drying is subjected to obtain the insulating element.
    In this way, a final product composed of several layers of intermediates can be obtained. If now the intermediates forming the individual layers show in their product properties in the course of the first process stage, i. in the pre-compaction and shaping stage, a final product having at least two layers can be created which have different properties from each other. As a result, specific requirements in the respective field of application of the insulating elements can be taken into account in a simple manner.
    The individual sections of the fiber web, which subsequently form the individual layers of the layer package, can preferably be obtained by cutting. The division into individual sections can take place before, during or after the first stage of the process. It is preferably provided that the nonwoven fabric is passed through the precompacting, shaping and predrying device until the desired length of the fiber web obtained in this first process stage is reached, whereupon the nonwoven fabric is conveyed by means of a pre-compaction, shaping and predrying device arranged separating, in particular cutting device is divided into corresponding sections. The arrangement of the separating, in particular cutting device has the advantage that the feed of the fibrous web can be interrupted after the separation or cutting until the still in the Vorverdichtungs-, shaping and
    Pre-drying device located portion of the fiber web has leaked from this. In the now empty precompression, shaping and predrying apparatus, various operating parameters can be changed, such as e.g. the compression ratio so that the next section of the fiber web can be made with changed properties. However, it is also possible to carry out the change of operating parameters during ongoing operation of the precompression, shaping and predrying device.
    An alternative embodiment provides that the cutting, in particular cutting the fiber web into individual sections after Vorverdichtungs-, shaping and predrying, in particular at the exit of the fiber web from said device is made.
    When talking of a pre-compaction, shaping and predrying device in the context of the invention, this does not necessarily mean that it is a single unit in which both pre-compaction and shaping and pre-drying are performed. Rather, it is also conceivable that it is two or more units arranged one behind the other, which together form the precompression, shaping and predrying device.
    If, in the context of the invention, further mention is made of compaction and shaping, this may also mean a single process in which shaping, namely the adjustment of the fiber web thickness, takes place by compaction. However, it may also be two or more operations, in particular if, in addition to the thickness adjustment, a forming operation takes place on the side edges of the web and / or on the large surfaces of the web, e.g. a corrugation takes place.
    A preferred embodiment of the invention provides that the predrying is regulated, so that the binder does not dry out on the surface of the fibrous web facing an adjacent layer, this being achieved in the binders commonly used in particular by the fact that at the said surface a temperature of 50-100 ° C is not exceeded. This ensures that the binder for the second process stage, namely the final compaction, shaping and final drying, is still active, so that the individual layers of the layer package can be materially interconnected.
    Advantageously, the predrying is carried out by means of pressed against the fiber web surface, cooled contact bodies, in particular rollers. The use of cooled contact bodies allows for temperature control on the large surface (s) of the fibrous web to keep the temperature below a desired threshold. In this context, additionally or alternatively, it can preferably be provided that the predrying comprises air cooling for cooling the surface of the fibrous web facing an adjacent layer.
    As known per se, the predrying can take place by means of hot-body contact, electromagnetic radiation, in particular radio-frequency waves, or by means of resistance heating. In the execution of predrying as resistance heating electrical current is passed through the fiber web and the material of the fiber web acts as an electrical resistance, which leads directly to the material itself to a warming.
    A preferred process control provides that at least one parameter of the first process stage, in particular the extent of precompression, the set thickness of the fiber web and / or the predrying temperature, is varied when changing from one section of the fiber web to another section of the fiber web. In particular, this may be carried out such that a first section of the fiber web with higher precompaction and a second section of the fiber web with lower pre-compression are stacked on one another.
    Thereby, an end product having layers of different density can be obtained. Thus, the density of the insulating material in an outer layer of the Dämmelements be greater than in a second layer. In a three-layered embodiment of the insulating element, the outer layers may have a different density, in particular a lower density, than the inner layer arranged between the outer layers. As is known per se, the mineral fibers, in particular the stone and / or glass fibers, can be produced in such a way that a silicate melt is produced in a smelting aggregate, which melts in one smelting aggregate
    Defibering is shredded into the mineral fibers.
    According to a further aspect of the invention, there is provided an apparatus for producing mineral fiber insulating elements, comprising
    A collection conveyor for collecting mineral fibers and for transporting the resulting nonwoven fabric, a precompacting, forming and
    A pre-drying device to which the nonwoven fabric is fed, a bearing for storing layers stacked in a layer package from portions of the fiber web coming from the precompression, shaping and predrying device and a final compacting, shaping and drying device to which the layer packet is fed.
    According to a preferred development, one of the precompression, shaping and predrying device upstream or downstream of the cutting device is provided for cutting the nonwoven fabric or the fibrous web into sections.
    According to a further preferred development, the precompacting, shaping and predrying device has pressable, cooled contact bodies, in particular rollers, which can be pressed against the fiber web surface.
    According to a further preferred development, the precompacting, shaping and predrying device comprises air cooling for cooling the surface of the fibrous web facing an adjacent layer.
    The precompacting, shaping and predrying device preferably has a hot-body contact heating, radiant heating, in particular a microwave or radio-frequency wave heating, or resistance heating.
    According to a further preferred development, the precompacting, shaping and predrying device has means for adjusting at least one method parameter, in particular the extent of pre-compaction, the set thickness of the fiber web and / or the predrying temperature.
    The invention will be explained in more detail with reference to an embodiment schematically illustrated in the drawing.
    In Fig. 1, a plant according to the invention for the preparation of a Dämmelements is shown. The plant comprises an electric melting furnace 1, in which the base material for the production of mineral fibers is melted down. In the case of an insulating element of rock wool, is in
    Electric melting furnace 1 stone material melted down. The melt emerging from the electric melting furnace 1 is fiberized into microfine fibers in a defibration device, not shown, to which binding and / or impregnating agents are added and which are deposited on a sedimentation conveyor belt 2 as a fiber fleece.
    The fiber flow thus obtained is transported in the direction of the arrow 4 and deposited by means of a pendulum suspended conveyor, the pendulum distributor 3, on a transversely running in the direction of the arrow 5 conveyor belt 6, so that a fiber web of a plurality of obliquely superimposed individual layers. The fibrous web passes through a supercharger 7, which consists of two arranged in defined, possibly adjustable distance roller groups. In this case, the fiber web is guided through the gap formed between the roller groups. This is followed by a surface profiling at 8. In the course of precompression, the fibrous web is predried, this being done, for example, by the contact of the fibrous web with the optionally cooled rolls of the precompressor 7.
    At the exit from the supercharger 7, the fiber web reaches a stacking device 9, in which a plurality of sections of the fiber web can be superimposed, so that a layer package of several fiber web layers is formed. To produce fiber web sections from the endless fiber web, a sawing device 10 arranged upstream of the supercharger 7 is provided.
    As soon as the layer package is completed, it is fed via an intermediate section 11 to a straightening unit 12 of two rollers. The layer package is passed through the gap formed between the two whales and thereby subjected to a final compaction. Thereafter, the layer package enters a drying oven 13, in which the final drying takes place. At the outlet from the drying oven, the dried fiber web is cut by means of the saw unit 14 by cross sections into insulating elements of the desired length and optionally trimmed laterally.
    权利要求:
    Claims (17)
    [1]
    claims:
    Anspruch [en] A process for producing mineral fiber insulating elements, wherein the mineral fibers are deposited on a conveyor to obtain a nonwoven fabric, wherein the mineral fibers are provided with a binder, and the nonwoven fabric is subjected to a forming and curing process, wherein the nonwoven fabric is added formed a fiber web of defined thickness and the binder is dried and cured, characterized in that the shaping and curing process takes place in at least two stages, wherein the nonwoven fabric is subjected in a first stage of a pre-compression and shaping and a predrying, in which the binder is only partially dried, wherein portions of the thus pretreated fiber web are stacked to obtain a ply package of at least two layers, and wherein the ply package in a second stage of a final compression and molding and a final drying subjected w ird to get the insulating element.
    [2]
    2. The method according to claim 1, characterized in that the sections of the fiber web are obtained by cutting the fiber web before or after the first process stage.
    [3]
    3. The method according to claim 1 or 2, characterized in that the pre-drying is controlled so that the surface of an adjacent layer facing the fiber web does not exceed a temperature of 50-100 ° C.
    [4]
    4. The method of claim 1, 2 or 3, characterized in that the predrying by means of pressed against the fiber web surface, cooled contact bodies, in particular rollers takes place.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that the pre-drying comprises an air cooling for cooling the adjacent layer facing surface of the fibrous web.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that the pre-drying by means of electromagnetic radiation, in particular microwaves, or by means of resistance heating.
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that at least one parameter of the first process stage, in particular the extent of precompression, the set thickness of the fiber web and / or the pre-drying temperature, when changing from one section of the fiber web to another section the fiber web is varied.
    [8]
    8. The method according to any one of claims 1 to 7, characterized in that a first portion of the fiber web with higher precompression and a second portion of the fiber web are superimposed with lower precompression.
    [9]
    9. The method according to any one of claims 1 to 8, characterized in that in a melting aggregate, a silicate melt is produced, which is defibrated in a defibration in the mineral fibers.
    [10]
    10. A device for the production of insulating elements made of mineral fibers, in particular for carrying out the method according to one of claims 1 to 9, comprising a collecting conveyor for collecting mineral fibers and for transporting the resulting nonwoven fabric, a precompression, shaping and predrying device, the nonwoven fabric a bearing for storing layers stacked in a layer package from portions of the fiber web coming from the precompression, shaping and predrying device and a final compacting, shaping and drying device to which the layer package is fed.
    [11]
    11. The device according to claim 10, characterized in that one of the precompression, shaping and predrying upstream or downstream cutting device for cutting the fiber web or the fiber web is provided in sections.
    [12]
    12. The device according to claim 10 or 11, characterized in that the Vorverdichtungs-, shaping and predrying against the fiber web surface contactable, cooled contact body, in particular rollers.
    [13]
    13. Device according to one of claims 10 to 12, characterized in that the Vorverdichtungs-, shaping and predrying means comprises an air cooling for cooling the adjacent layer facing surface of the fibrous web.
    [14]
    14. The device according to one of claims 10 to 13, characterized in that the precompression, shaping and predrying device has a radiant heater, in particular a microwave heater, or a resistance heater.
    [15]
    15. The device according to one of claims 10 to 14, characterized in that the precompression, shaping and predrying means comprises means for adjusting at least one process parameter, in particular the extent of precompression, the set thickness of the fiber web and / or the pre-drying temperature.
    [16]
    16. insulating element of mineral fibers, in particular stone and / or glass fibers, in particular produced by means of a method according to one of claims 1 to 9, wherein the mass density of the insulating element varies over the thickness thereof.
    [17]
    17. Insulating element according to claim 16, characterized in that it has at least two layers or thickness sections of different mass density.
    类似技术:
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    同族专利:
    公开号 | 公开日
    AT516749B1|2016-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO1997001006A1|1995-06-20|1997-01-09|Rockwool International A/S|A method of producing an annular insulating mineral fiber covering, a plant for producing an annular insulating mineral fiber covering, and an annular insulating mineral fiber covering|
    EP1561847A1|2004-01-21|2005-08-10|Deutsche Rockwool Mineralwoll GmbH & Co. OHG|Method and apparatus for manufacturing insulating webs or platesfrom mineral fibers|
    DE102005002649A1|2004-01-21|2005-08-25|Deutsche Rockwool Mineralwoll Gmbh + Co Ohg|Manufacturing rolls or slabs of mineral fiber insulation, passes laid mineral fiber into stretching station at right angles to conveying direction, before entry into hardening oven|
    WO2005072951A1|2004-01-31|2005-08-11|Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg|Method for the production of a web of insulating material and web of insulating material|IT201700011589A1|2017-02-02|2018-08-02|Patrizio Grando|METHOD FOR THE TREATMENT OF FIBROUS MATERIALS AND PLANT WHICH REALIZES THE ABOVE METHOD OF TREATMENT|
    法律状态:
    2020-04-15| PC| Change of the owner|Owner name: DEKAS GMBH, AT Effective date: 20200225 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA424/2015A|AT516749B1|2015-07-02|2015-07-02|Method and device for producing insulating elements from mineral fibers|ATA424/2015A| AT516749B1|2015-07-02|2015-07-02|Method and device for producing insulating elements from mineral fibers|
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