DE102007024968A1 - Process and apparatus for producing a mineral wool product and mineral wool product made therewith - Google Patents

Abstract

The invention relates to a method for producing a mineral wool product, in which a raw fleece (3) made of uncured binder mineral wool on a conveyor for molding the product and for curing of the binder in a hardening furnace (2) is passed, which in the manner of a tunnel kiln is formed and has an upper band (21) and a lower band (22). According to the invention, a diffusion-open separating belt (5) is arranged between the raw fleece (3) and the upper belt (21) and / or the lower belt (22). Furthermore, the invention relates to a corresponding device (1) and a mineral wool product produced therewith. This achieves an improved production method for a mineral wool product, wherein in particular the post-processing effort on the mineral wool products emerging from the hardening furnace can be reduced.

Description

The This invention relates to methods of making a mineral wool product, in which a raw nonwoven made with an uncured binder provided mineral wool on a conveyor to Forming the product and curing the binder is passed into a curing oven, which in the manner of a tunnel oven is formed and has an upper band and a lower band. The The invention further relates to a device according to the The preamble of claim 9 and the use of this device according to claims 17 and 18 and a mineral wool product according to claim 19.

at The production of mineral wool products is first Raw fleece produced. This contains mineral wool fibers, which are made in a fiberization station, then wetted with an uncured binder and then be stored on a conveyor. The thus formed Raw fleece is typically through the conveyor continuously transported away from the area of the fiberization station and usually post-processing steps such as one Dickenkompression, a longitudinal compression or the like subjected. Finally, this raw fleece is placed in a curing oven in which the binder is generally heated by heat and / or radiation action hardens and thus gives a product of predetermined geometry, which continues exists as a continuous web. This will then depending on the nature of the desired Product usually by vertical and / or horizontal cuts mostly plate-shaped mineral wool products for the heat or sound insulation produced.

The Curing of the binder in the curing oven provides doing a significant for the product properties process step dar. Since the raw nonwoven continuously through the curing oven is guided, are the process conditions in the curing oven to control exactly, to complete curing of the binder for establishing integral cohesion within to achieve the mineral wool fleece, without being too high To introduce energy into the mineral wool fleece, resulting in damage could lead to the structure and also with a Waste of energy would be connected. In practice hardening furnace is often used for the hardening step used with a top band and a sub-band, between which the raw fleece is present and by means of which the raw fleece by the Hardening furnace is moved through. Such hardening furnaces are also referred to as tunnel ovens.

Around a uniform curing of the binder over To achieve the entire thickness of the raw nonwoven, one makes oneself Here, as a rule, the open-pore structure of mineral wool too Use to achieve throughflow drying. So For example, in the region of the upper belt, a heated hardening gas is used such as B. air provided with overpressure, wherein the lower band a negative pressure is applied so that the hardening gas starting from the top band the raw fleece and finally the Subband flows through and is sucked out there. This process can also be executed in the opposite direction become. Also, a tunnel furnace sections in several curing areas be divided, whereby different temperature zones adjustable are. The flow ensures that not only the binder in the near-surface areas of the Rohvlieses hardens, but a complete Through hardening of the fleece succeeds.

In order to the hardening gas must be effective, but it must not only penetrate the mineral wool, but also through appropriate openings in the upper band and in the lower band can pass through. In other words, the top and the bottom band have to have a sufficient perforation, so that the desired Durchströmungsmaß and thus a practicable curing speed be achieved. This procedure for curing a Binder in a mineral wool fleece has become very practical in practice proven.

There the raw fleece, however, in a compressed state through the curing oven is guided so that a constant desired thickness of achieved product is achieved, it is in the conventional Procedure unavoidable that one in the area of the openings Mineral wool material present in the upper or lower band of the hardening furnace to some extent enters these openings and on the cured product as so-called flight prints is visible. These flightprints are regular Elevations on the large surfaces the cured mineral wool fleece.

Since mineral wool products are often installed concealed as for example in an intermediate rafter insulation or the like, these Flightabdrücke in practice usually not a problem. It is different, however, if the product surface of the mineral wool product to be produced is still visible in the installed state or increased demands on the Planicity of the surface can be made. This is, for example, certain facade insulation panels and acoustic or Schalldämmplat the case. In particular, in the case of soundproofing panels, such flightprints are regarded as unacceptable, since they are usually used on the ceiling in the interior and thus would be permanently visible. Often, such acoustic or sound insulation panels are also provided for optical reasons with high-quality and correspondingly expensive laminations, with a show through of the Flightabdrücke by the applied lamination is to be avoided in any case.

Therefore becomes the visible surface of such sound insulation panels regularly reworked. This typically happens by a multi-stage grinding, with which on the one hand removed the elevations in the form of the flightprints and on the other hand produced an exact planicity of these plates becomes. However, this post-processing step is expensive. It requires considerable machine as well as personnel and time Effort and thus costly.

About that In addition, such mineral wool panels are currently typical made with an excess in thickness, So that enough material for the grinding process is available. In the conventional way of production is thus an additional use of mineral wool material given, with the excess mineral wool material destroyed by the grinding step and finally is eliminated. This also causes additional costs both in With regard to the provision of additional mineral wool for the excess as well as for the disposal of the abraded material.

Of the Invention is therefore the object of a method and a Apparatus for producing a mineral wool product according to the generic Art to continue to form such that the post-processing effort the mineral wool products resulting from the hardening furnace can be reduced.

These Task is in procedural terms by the features of claim 1 solved. This one stands out in particular characterized in that between the raw fleece and the upper belt and / or the Subband a diffusion-open release tape is placed.

Of the The invention is therefore based on the finding that despite the through the uncured binder still sticky surface of the raw nonwoven fabric and the required maintenance of the throughflow capability the raw nonwoven through the hardening medium is possible a separating element between the surface of the raw nonwoven and the upper band and / or the lower band and so the penetration of Mineral wool sections in the flow openings to prevent this.

there has been shown in practical experiments within the scope of the invention, that when using a suitable release tape, an adhesion of the raw nonwoven at this in the course of curing of the binder can be substantially avoided. The separating tape is therefore not an integral part of the produced mineral wool product and can be removed after the hardening step, without causing damage to the near-surface Mineral wool material comes in the product. At the same time, this bridges Separating band the openings in the upper band or in the lower band in such a way, that an evasion of mineral wool material in these openings is prevented and thus no increases on the product. Therefore, according to the invention a achieved particularly flat and without Flightabmuster patterned product surface.

Dependent From the optical requirements can be with the inventive Process produced mineral wool products thus without a post-processing step insert on the visible surface, so that in particular on the conventionally given consuming grinding step can be dispensed with on the product surface. hereby reduces the production cost of such mineral wool products considerably, which accelerates the production, the apparative as well also reduced personnel expenses and thus the costs significantly lowers. In addition, according to the invention also no overkill in the end desired product thickness more required, resulting in reduce the material costs. At high quality Acoustic or acoustic insulation panels with special requirements to the visual impression is i. d. R. the grinding step continues however, the listed benefits may be required be at least partially realized. In particular, allows the inventive method the reduction of the so far often multi-stage on a one-step grinding step.

Further is the release tape according to the invention open to diffusion designed so that it has a reliable flow allowed by the hardening medium and thus the hardening step not significantly impeded. By the invention Verfabren will thus continue to be a reliable through hardening achieved the produced mineral wool product.

From Another advantage is that the inventive Method by slight modification of conventional Production lines easily to these out is feasible. The cost of retrofitting conventional Production equipment is therefore low.

advantageous Further developments of the method according to the invention are the subject of dependent claims 2 to 8th.

So can the separating belt of a large area of the raw nonwoven supplied in the conveying direction before the curing oven and in the conveying direction after the hardening furnace from the hardened Fleece be led away. This can be with simple means a provision as well as a removal of the Achieve separation tape directly in the desired working area. In particular, this can be done with little effort to retrofit a conventional production line.

there it is possible that the separating tape in front of the hardening furnace withdrawn from a supply roll and after the curing oven rolled up on a composite roll. That way the separating tape in the manner of a conventional lamination with simple means on the upper or lower large area Apply the raw nonwoven and equally with low Then withdraw the effort again. This approach has the advantage that it can be used with very little effort on conventional Production lines can be executed and further production steps not impaired. At the same time, the separating tape after a single Use or as far as possible after a desired Number of applications can be easily disposed of without the continuous production process thereby impaired would.

alternative However, it is also possible that the separating belt as an endless belt is provided, for example, continuously from it adhesive binder residues, etc. is cleaned. Also such an endless band fits perfectly into the continuous production process integrate in the production of mineral wool products. A Customization of conventional processes is easy possible.

According to one Alternatively, it is also possible that a separating band covering the upper band and / or the lower band and with this circulates. This has the advantage of making changes at the production facilities only within the curing oven and here in the range of the upper band or the lower band result. The separation tape can be z. B. on the type of stocking the upper band or the lower band and over suitable facilities are continuously cleaned. The space requirement for this procedure is particularly low.

in this connection Can the release tape as glass filament fabric, for which the Designations glass fiber fabric or glass fabric in use are, be trained, which in practical experiments as has proved particularly suitable for this purpose. Glass filament fabric has good structural integrity although it only has a very small thickness, so that is a very can achieve diffusion-open release tape. The flow resistance in the curing oven is made by such a glass filament fabric therefore only slightly influenced. In addition, such has Glass filament fabric an open-pore shape with irregular, relatively small pores, so no flow openings are of the size that mineral wool material from the raw fleece in these occur to a relevant extent would. Moreover, such glass filament fabrics have a sufficient inherent stability, that they are the flow openings in the upper band or in the lower band also against the compression pressure within of the curing oven can reliably bridge and thus the formation of elevations on the product surface reliably counteract the mineral wool fleece. Further This inherent stability allows a reliable Lifting the release tape from the cured web without a Damage to the nonwoven structure of both the glass filament fabric as well as the cured fleece.

Alternatively, it is also possible that the separating tape made of polytetrafluoroethylene (PTFE) is formed and perforated. This plastic is characterized by excellent material properties, especially with regard to its heat resistance and its adhesion protection. As practical experiments have shown in the context of the invention, cured binder does not adhere to a relevant extent to a separating belt made of PTFE, so that it comes when lifting from the product surface to no destruction of these in the process flow. At the same time PTFE can be provided in very thin layers and with suitable perforation, so that the flow resistance with respect to the flow through the raw nonwoven by the hardening medium hardly relevant relevance. Furthermore, such a film-like separating belt further has a very good mechanical strength. The given inherent stability of such a release tape made of PTFE also allows a reliable bridging of the flow openings in the upper belt and / or in the lower belt of the curing oven, so that thereby also an entry of mineral wool material in these openings reliably below is bound. The formation of Flightabdrücke can thus be reliably avoided by a separating belt made of PTFE.

In another alternative, it is also possible the separating belt as metal mesh, in particular as stainless steel mesh, form, which is particularly advantageous in terms of robustness and longevity of the separating tape is.

According to one Another aspect of the invention according to claim 9, a device for producing a mineral wool product, which a conveyor for guiding a Rohvlieses with mineral wool provided with an uncured binder for shaping the product and for curing the binder in a curing oven, which in the manner of a tunnel oven is formed and has a top band and a lower band. The device according to the invention is characterized thereby characterized by the fact that between the raw fleece and the upper band and / or the sub-band a diffusion-open release belt is arranged.

through the device according to the invention can be also achieve the above-mentioned advantages. About that In addition, such a device can be in an advantageous Realize with little effort and in existing production lines retrofit.

advantageous Further developments of the device according to the invention are the subject of dependent claims 10 to 16. With these features can be analogous to the above based on the Method illustrative advantages in the context of the invention achieve.

According to A further aspect of the invention according to claim 17 is the use a device according to the invention for the production specified by sound insulation panels. The inventive Device can be particularly advantageous use the production of sound insulation panels, as these are more typical Way have a relatively large density, the sound insulation effect to support. Accordingly, the degree of compression of the raw nonwoven in the curing oven comparatively high and thus in conventional devices, the degree of Mineral wool entry into the flow openings particularly pronounced in the upper band or in the lower band. By the Maßnabmen invention, namely the provision of a diffusion-open release tape between the raw fleece and the upper belt or the lower belt of the hardening furnace, However, the formation of such Flightabdrücke can also and especially in the production of sound insulation panels especially be reliably prevented.

According to Another aspect of the invention according to claim 18 is the use a device according to the invention for the production indicated by facade insulation panels. Again, it has turned out to be proved particularly advantageous when the flightprints on the visible surfaces by the invention Measures are avoided.

To Claim 19, the invention further provides a mineral wool product, in particular a sound insulation board or facade insulation board, from bound mineral wool, which preferably by an inventive Verfabren or a device according to the invention is made. This mineral wool product stands out characterized in that at least one large area thereof plan is formed and has no elevations, which through openings in the upper band and / or in the lower band of a Hard Furnace are formed.

The Invention will be described below in embodiments the figures of the drawing explained in more detail. It shows:

1 a schematic side view of a device according to the invention in a first embodiment;

2 a schematic side view of a device according to the invention in a second embodiment;

3 a schematic side view of a device according to the invention in a third embodiment;

4 a section through a conventional mineral wool product; and

5 a section through an inventively produced mineral wool product.

As shown in the figures, a device 1 a hardening furnace 2 on, in which a raw fleece 3 made of mineral wool, which is provided with an uncured binder, is introduced and then subjected to a curing. Then it leaves as a shaped mineral wool fleece 4 the hardening furnace 2 , In the curing oven 2 two counter-rotating conveyor belts are arranged, which are the raw fleece 3 between them and through the hardening furnace 2 pass through. This task is done by a top band 21 as well as a subband 22 Fulfills. These are conventionally provided with throughflow openings for a hardening medium, which is typically heated, and through a suction device (not shown here) in the area of the lower band 22 from the area of the upper band 21 sucked in and thus through the raw fleece 3 is guided through. The binder hardens in the raw fleece 3 out. The resulting mineral wool fleece 4 can then by suitable post-processing steps such. B. separating cuts, etc. to certain mineral wool products are further processed. So z. B. sound or facade insulation panels are made by this.

The devices 1 according to the representations in the 1 . 2 and 3 differ in the arrangement method and the design of a release belt, which between the top of the green fabric 3 and the upper band 21 in the area of the curing oven 2 is arranged and guided.

As shown in 1 is a separator 5 provided, which of a conveying direction before the curing oven 2 arranged supply role 6 pulled off and in the area between the raw fleece 3 and the upper band 21 is introduced. At the rear end of the curing oven in the conveying direction 2 there is a lifting of the separating belt 5 from now trained mineral wool fleece 4 , where the separating tape 5 on a composite role 7 being rolled up. As soon as the separating tape 5 wholly by the staging role 6 this is deducted either by the composite role 7 or another supply roll with not yet or already used release belt 5 replaced.

In 2 is an alternative embodiment of a device 1 according to which a separating belt 5 ' is designed as an endless belt and by means of pulleys 8th so around the upper section of the curing oven 2 it is led around that inside the hardening furnace 2 between the surface of the raw fleece 3 and the upper band 21 of the curing oven 2 to come to rest.

In the further embodiment according to 3 covers a divider 5 '' the upper band 21 of the curing oven 2 completely off and running with this. The separating tape 5 '' is stocking over the top band 21 reared.

In all embodiments, not shown here Abreinigungsvorrichtungen are provided in the figures, which on the separating belt 5 . 5 ' respectively. 5 '' Remove remaining binder medium or fiber particles from this. This is especially true of the endless bands 5 ' and 5 '' according to the 2 and 3 from the particular advantage in terms of a continuous use of Trennbänder, so as to be able to keep the replacement intervals of the same large. But also in embodiment according to 1 the cleaning is of particular advantage with regard to a multiple use of the separating tape 5 ,

In the 4 and 5 are a conventional mineral wool product 9 and a mineral wool product made according to the invention 9 ' opposite posed.

4 shows a cross section through the conventional mineral wool product 9 , at which on both sides large increases significantly 91 are visible, which are also referred to as flight prints. These elevations were caused by the fact that mineral wool material from the large areas due to the compression pressure in the hardening furnace in the perforation openings in the upper and lower band of the curing oven occurred.

5 on the other hand shows that by a device 1 according to one of 1 to 3 manufactured mineral wool product 9 ' in which there are no elevations on the top 91 exist, because there the separation band 5 respectively. 5 ' respectively. 5 '' was arranged. Only on the underside, to which no separating strip was used in the illustrated embodiments, are still elevations 91 given. The flat top of the mineral wool product 9 ' can thus serve as a visually pleasing visible surface.

As separation tape comes z. B. a glass filament fabric in the manner of a PTFE-coated glass mesh fabric belt used. This has an open mesh size of about 1 mm x 1 mm and has a thickness of about 0.65 mm. It is an endless belt with air-permeable spiral connection and Kevlar edges on both sides.

An example of this is a glass filament fabric with warp and weft made of E glass according to material class DIN 5159/1 and a basis weight between 100 g / m ² and 500 g / m ² . The thread density on warp is in the range of 12 to 19 threads / cm and the weft at about 11 to 12 threads / cm. The threads are non-slip and contain no fibers with a diameter smaller than 3 microns. The loss on ignition is 5 to 6%, the tensile strength on the chain being in the range of 850 to 3500 N / 50 mm and the weft between 1500 and 2000 N / 50 mm. The elongation at break is less than 4.0% on warp and weft.

following Examples of such glass filament fabrics are given:

Example 1:

Glass filament fabric, black, flame retardant, uniform structure Yarn according to DIN EN 12654 : Chain: EC 9-34 / tex Shot: EC 9-68 / tex Thread density after DIN EN 1049 : Chain: 12.0 threads / cm Shot: 11.5 threads / cm Weight per area DIN EN 12127 : Finished product: 127 g / m ² Raw material: 120 g / m ² Loss of ignition according to DIN ISO 1887 : ≤ 6% Tear resistance after DIN EN 12654 : Chain: ≥ 850 N / 50 mm Shot: ≥ 1700 N / 50 mm Elongation after DIN EN 12654 : Chain ≤ 3.5% Shot ≤ 4.0%.

Example 2:

Glass filament fabric, white, flame retardant, uniform structure Yarn according to DIN 60 850/1 : Chain: EC 9-68 / tex Shot: EC 9-68 / tex Thread density after DIN 53 853 : Chain: 12.0 threads / cm Shot: 11.5 threads / cm Weight per area DIN 53 854 : Finished goods: 172 g / m ² Raw material: 163 g / m ² Loss of ignition according to DIN ISO 1887 : ≤ 6% Tear resistance after DIN 53 857 : Chain: ≥ 1700 N / 50 mm Shot: ≥ 1700 N / 50 mm Elongation after DIN 53 857 : Chain ≤ 4.0% Shot ≤ 4.0%.

Example 3:

Glass filament fabric, white, non-flammable according to IMO Resolution A.472 (XII), uniform structure Yarn according to DIN 60 850/1 : Chain: EC 9-136 / tex Shot: EC 9-136 / tex Thread density after DIN 53 853 : Chain: 19.0 threads / cm Shot: 11.0 threads / cm Weight per area DIN 53 854 : Finished product: 430 g / m ² Raw material: 420 g / m ² Loss of ignition according to DIN ISO 1887 : ≤ 5% Tear resistance after DIN 53 857 : Chain: ≥ 3500 N / 50 mm Shot: ≥ 2000 N / 50 mm Elongation after DIN 53 857 : Chain ≤ 4.0% Shot ≤ 4.0%.

Example 4:

Glass filament fabric, white, Low Flame Spread Surface Material according to IMO Resolution A.653 (16), IMO Resolution MSC 61 (67), uniform structure Yarn according to DIN 60 850/1 : Chain: EC 9-68 / tex Shot: EC 9-68 / tex Thread density after DIN 53 853: Chain: 17 threads / cm Shot: 12 threads / cm Weight per area DIN 53854 : Finished goods: 220 g / m ² Raw material: 204 g / m ² Loss of ignition according to DIN ISO 1887 : ≤ 6% Tear resistance after DIN 53 857 : Chain: ≥ 2200 N / 50 mm Shot: ≥ 1500 N / 50 mm.

The used glass filament fabric can specifically for this Be made use of or even from failed batches from the Production of such glass filament fabrics come.

The The invention is in addition to the illustrative embodiments additional design approaches too.

For example, it is also possible to have a corresponding separating strip in the region between the raw nonwoven fabric 3 and the subband 22 provided so as to avoid the formation of Flightabdrücken on the underside of the mineral wool fleece. In particular, it can also be used to achieve products which do not have any flightprints on both sides, in the hardening oven both on the underside and on the upper side of the raw nonwoven 3 a separating band 5 respectively. 5 ' respectively. 5 '' is carried.

When Separating tape may also be an uncoated or otherwise coated Glass filament fabric, a plastic tape z. B. PTFE or a stainless steel mesh be used with a mesh size of about 0.5 mm.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited non-patent literature

• - DIN 5159/1 [0047]
• - DIN EN 12654 [0049]
• - DIN EN 1049 [0049]
• - DIN EN 12127 [0049]
• - DIN ISO 1887 [0049]
• - DIN EN 12654 [0049]
• - DIN EN 12654 [0049]
• - DIN 60 850/1 [0050]
• - DIN 53 853 [0050]
• - DIN 53 854 [0050]
• - DIN ISO 1887 [0050]
• - DIN 53 857 [0050]
• - DIN 53 857 [0050]
• - DIN 60 850/1 [0051]
• - DIN 53 853 [0051]
• - DIN 53 854 [0051]
• - DIN ISO 1887 [0051]
• - DIN 53 857 [0051]
• - DIN 53 857 [0051]
• - DIN 60 850/1 [0052]
• - DIN 53 853: [0052]
• - DIN 53854 [0052]
• - DIN ISO 1887 [0052]
• - DIN 53 857 [0052]

Claims (19)

Process for the production of a mineral wool product, in which a raw fleece ( 3 mineral wool provided with an uncured binder on a conveyor for shaping the product and for curing the binder in a hardening furnace ( 2 ), which is designed in the manner of a tunnel kiln and a top band ( 21 ) as well as a subband ( 22 ), characterized in that between the raw fleece ( 3 ) and the upper band ( 21 ) and / or the subband ( 22 ) a diffusion-open release belt ( 5 ; 5 '; 5 '' ) is arranged. Method according to claim 1, characterized in that the separating tape ( 5 ; 5 '; 5 '' ) of a large area of the raw nonwoven ( 3 ) in the conveying direction before the curing oven ( 2 ) and in the conveying direction after the curing oven ( 2 ) from the cured fleece ( 4 ) is led away. Method according to claim 2, characterized in that the separating belt ( 5 ) in front of the hardening furnace ( 2 ) from a deployment role ( 6 ) and after the curing oven ( 2 ) to a composite role ( 7 ) is rolled up. Method according to claim 2, characterized in that the separating belt ( 5 '; 5 '' ) is provided as an endless belt. Method according to claim 1, characterized in that the separating tape ( 5 '' ) the upper band ( 21 ) and / or the subband ( 22 ) covers and rotates with this. Method according to one of claims 1 to 5, characterized in that the separating belt ( 5 ; 5 '; 5 '' ) is formed as a glass filament fabric. Method according to one of claims 1 to 5, characterized in that the separating belt ( 5 ; 5 '; 5 '' ) is made of PTFE and perforated. Method according to one of claims 1 to 5, characterized in that the separating belt ( 5 ; 5 '; 5 '' ) is formed as a metal fabric, in particular as a stainless steel mesh. Contraption ( 1 ) for producing a mineral wool product, having a conveying device for guiding a raw nonwoven (US Pat. 3 mineral wool provided with an uncured binder for shaping the product and for curing the binder in a hardening furnace ( 2 ), which is designed in the manner of a tunnel kiln and a top band ( 21 ) as well as a subband ( 22 ), characterized in that between the raw fleece ( 3 ) and the upper band ( 21 ) and / or the subband ( 22 ) a diffusion-open release belt ( 5 ; 5 '; 5 '' ) is arranged. Apparatus according to claim 9, characterized by a feed device for feeding the separating belt ( 5 ; 5 ' ) to a large surface of the raw nonwoven ( 3 ) in the conveying direction before the curing oven ( 2 ), as well as by a removal device for removing the separating strip ( 5 ; 5 ' ) from the cured fleece ( 4 ) in the conveying direction after the curing oven ( 2 ). Apparatus according to claim 10, characterized in that the supply means a supply role ( 6 ) and that the removal device is a composite role ( 7 ). Device according to claim 10, characterized in that the separating belt ( 5 '; 5 '' ) is formed as an endless belt. Device according to claim 9, characterized in that the separating belt ( 5 '' ) the upper band ( 21 ) and / or the subband ( 22 ) covers and rotates with this. Device according to one of claims 9 to 13, characterized in that the separating belt ( 5 ; 5 '; 5 '' ) is formed as a glass filament fabric. Device according to one of claims 9 to 13, characterized in that the separating belt ( 5 ; 5 '; 5 '' ) is made of PTFE and perforated. Device according to one of claims 9 to 13, characterized in that the separating belt ( 5 ; 5 '; 5 '' ) is formed as a metal fabric, in particular as a stainless steel mesh. Use of a device ( 1 ) according to one of claims 9 to 16 for the production of sound insulation panels. Use of a device ( 1 ) according to one of claims 9 to 16 for the production of facade insulation panels. Mineral wool product ( 9 ' ), in particular sound insulation board or facade insulation board, of bonded mineral wool, preferably produced by a method according to one of claims 1 to 8 or by a device ( 1 ) according to one of claims 9 to 16, characterized in that at least one large area of the mineral wool product ( 9 ' ) plan is formed and no through openings in the upper band ( 21 ) and / or in the subband ( 22 ) of a curing oven ( 2 ) increases ( 91 ) having.