DE102008057557A1 - Method for manufacturing flexible insulation and/or sound protection plate or flexible semi-finished product for subsequent processing in hot press, involves fusing portions of binding material fibers in mat, and hardening portions - Google Patents

Abstract

The method involves providing natural fibers (1) and binding material fibers (33) with a maximum length of 15 mm, and mixing the fibers with one another. The mixed fibers are distributed on a form belt to a mat (7), and the distributed fibers are transferred from the belt to a strainer band of a calibration and fusing unit (8). The mat is compressed to a product thickness, and overheated steam is introduced to the mat. Portions of the binding material fibers are fused in the mat and hardened to a flexible insulation and/or sound protection plate (22) or flexible semi-finished product. An independent claim is also included for a calibration and fusing unit for manufacturing a flexible insulation and/or sound protection plate or flexible semi-finished product.

Description

The The invention relates to a method for the production of insulating and / or sound insulation panels or flexible semi-finished products for further processing in hot presses according to the preamble of claim 1 and a calibration and welding unit for the production of insulation and / or sound insulation panels or flexible semi-finished products according to the preamble of claim 25.

With the increasing demand for thermal insulation materials for the production of energy-saving houses (heat protection ordinance from 1982 and the subsequent tightening same including that after the millennium newly introduced energy pass for houses) has been in thermal insulation for the past 30 years again an ecologically degradable and renewable resource brought into conversation, the wood fiber. In recent years, Due to the timeliness of climate change, the Thermal insulation based on wood fibers, again conquering a market and there is a great need for innovation Manufacture wood fiber insulation economically. Wood fiber insulation There are currently in the market in loose form, this will be the wood fibers blown into prepared cavities and form this the insulating layer or in solid form as Holzfaserdämmplatten.

since the global increase in crude oil and energy prices The house insulation is not only aimed at oil-based You want to carry out insulating materials also possible in the production of insulating materials save a lot of energy and oil-based insulation materials be independent. At the same time, the created insulation materials easy to process for wall insulation, sufficient strength during transport or handling against breakage or cracks and at the same time no harmful organic Emit pollutants. In addition, the previous hard foam products or used mineral wool besides the ecological problems also no optimal living environment within a building could ensure. The previous reasons for Building owners have been ecologically unimpaired so far the high cost of wood fiber insulation due to of high energy consumption.

So far known and common methods are the wet method and the dry process. Basically, the raw material is out Logs or sawmill residues processed into wood chips, cooked under pressure and heat and by means of a shredding device (Refiner) shredded. In the wet production of Holzfaserdämmplatten is the Suspension spread from the refiner to a wet soft fiber mat and mostly calibrated and pressed by calender. Then done the drying and the associated curing over a hydraulic cycle press. In addition to an insufficient Dimensional stability is also the bad environmental compatibility and the enormous energy consumption of disadvantage.

In the dry production of Holzfaserdämmplatten the emerging from the fiberizer (refiner) fibers are dried and formed after the addition of binders dry to a mat. Calibration, drying and curing are then carried out in a throughflow dryer in which hot air flows through the wood fiber insulation board ( EP 0 330 671 B1 ). The simplification of the plant components and the advantage of being able to produce considerably thicker insulating boards with independent strength have made the dry process widely used despite the enormous energy costs for drying.

In Further improvements in process engineering are now available established, especially in the automotive industry, fiber or insulation boards basically made of cheap wood fiber material, but in addition to increasing the handling and the ability to establish customizable blanks with plastics are offset.

The basic manufacturing processes and equipment mostly the application of hot air flows in Continuous dryers in common. Here are the loose poured Mats covered with hot air, the plastic on melted and solidified.

Of the Disadvantage of these systems is the large amount of air, which is necessary for a scattered litter mat optimally to ventilate and to warm. Alone the heating at 100 ° C the litter mat is almost in the minute range and limits very much the possible production capacity. At the same time, existing production facilities are built very long, up to 40 m dryer length and bind a high value Fixed assets and machine costs.

simultaneously is the energetic application of hot air expensive and at Rising energy prices have become almost uneconomical. In the Usually the hot air is produced or via heat exchangers taken from existing plant components (wood fiber production, wood pulping process), Nevertheless, the energy consumption for several thousand cubic meters is heated Hot air per hour considerably.

The object of the present invention is to provide a method with the insulation and / or sound insulation mats or panels or flexible semi-finished product for further processing in Heißpres can be produced on short plants with the highest possible energy efficiency and simultaneous small production plants. Next, a calibration and welding unit to be created, which in addition to their independence also allows implementation of the method and advantageously has the ability to initiate superheated steam in a mat.

The solution to this problem for a method consists in the sequence of the following method steps:
natural and at least partially made of plastic binder fibers are provided with a maximum length of up to 15 mm, the natural and binder fibers are proportionally mixed together, the mixed natural and binder fibers are sprinkled with at least one scattering device on a forming belt to a mat , the scattered mat is transferred from the forming belt to a screen belt of a calibrating and welding unit, the scattered mat is covered in the calibrating and welding unit with a second screen surface and compacted substantially to product thickness, in the compacted mat is superheated steam in the Calibrating and welding unit initiated and in the compacted mat at least parts of the binder fibers are melted and solidified into a flexible insulation and / or sound insulation panels or a flexible semi-finished for further processing in a press.

The Solution for a calibration and welding unit is that for supporting the Siebgewebebänder and to introduce superheated steam into one the mat running between the screen fabric tapes made of natural and binder fibers above and / or below steam plates are arranged and the steam plates with a device for the production of superheated Steam are connected.

With the proposed method and can now use insulating and / or soundproofing mats or panels or flexible semi-finished products for further processing in hot pressing cost-effective compared with the previous practice used in the Technology are produced. This is advantageously the heated mat heated to 100 ° within a few seconds. It is particularly advantageous if the steam first is injected from both sides into the mat at the same time and so on both sides penetrates into the center of the mat. In the continuous Application, it offers a wedge-shaped evaporation Provide, that means that in the production direction of the steam first injected over the width in the center of the mat becomes and becomes activatable in the further course to the narrow sides Nozzles spread out. This results in the possibility the air present in the mat is directed towards narrow sides substituted by superheated steam without extreme turbulence caused by a steam roller occurring across the width. After about 20-60 seconds is finally one sufficient heating of the mat is achieved, so that the Binder fibers or the existing plastic with a melting temperature melted below 150 ° and surround itself with natural fibers combines. For a layout or configuration of the system is to be expected that 1 ton of fibers by means of condensation heat heated to 100 ° Celsius with 5% steam is equivalent to a water volume of 50 kg. Already showing here the particular advantage of the invention, which consists in overheated Steam the fibers at the initial evaporation to about 100 ° abruptly warm up and subsequently by the overheating of the Steam the binder fibers to 105-130 ° C heat so that they melt and weld the mat. Only by using superheated steam in a short time a temperature of over 100 ° C. achieve in the mat or on the fibers. A pure Heißlufteindüsung As known from the prior art takes too much time. With a temperature of at least 100 ° C, preferably from 110 to 135 ° C can the cost-effective bicofiber (bicomponent fibers) how to use polyester according to the method. For optimal process application, the steam is included overheating by about 100 °, ie a temperature of about 200 ° C. By the way, it is technically possible if the back pressure in the mat is eliminated or the air sufficiently substituted with steam, the mat only one-sided to flow with superheated steam or too to provide alternating steam applications.

In In a particularly preferred embodiment, the Binder fibers with a weight percentage of up to 30% with the Natural fibers mixed. Next can additionally liquid binders before, during or after the Mixing the natural with the binder fibers before or in the scattering device be supplied. In this case, phenol-formaldehyde, Urea-formaldehyde, melamine-formaldehyde resin, acrylic resin or VIDI adhesive be used.

Concerning the binder fibers, apart from other synthetic fibers, bicomponent fibers have proven useful, which may also be present in different lengths. Usually, the plastic fibers are cut by machine from strands, so that there is a statistically almost equal fiber elongation. However, it would be particularly preferable to strive for a statistical length distribution of the binder fibers which corresponds to a substantially similar length distribution of the natural fibers. The bicomponent fibers may consist of a core and a substantially enveloping shell component. Preferably, the core com Components have a higher melting temperature compared to the shell component.

Especially highlighted is an embodiment of the method, wherein in the calibration and welding unit by the overheated Steam at least proportionately only the sheath component of the bicomponent fibers melted and glued.

With respect to evaporation, the following values have been proven in tests:
The calibration and welding unit uses superheated steam at temperatures above 170 ° C. In more detail can be injected as superheated steam saturated steam at least 1.1 to 2 bar with an overheating of at least 50 ° C from the steam chamber in the mat. It may be advantageous to simultaneously introduce the superheated steam from one surface side through the mat and / or from both surface sides into the mat. In addition to a continuous application of these possibilities, however, depending on the product, it is also possible to perform the input and / or the transmission alternately and / or alternately and / or wedge-shaped or parabolic in the calibration and welding unit. In this context, an alternating introduction is understood to mean that areas with steam introduction alternate with areas with little or no steam introduction. Alternately describes the possibility of two-sided or unilaterally changing from above or from below into the mat initiate. Particularly preferred, however, is the wedge-shaped or parabolic inlet inlet, in which the air present in the mat is gently displaced against the production direction and replaced by the superheated steam, at the same time in the direction of the narrow sides more and more steam inlet are opened with simultaneous onward transport in the product direction. The operation of steam injection in the superheated steam calibrating and welding unit should take place in a period of 5 to 180 seconds. Also, depending on the fiber material used, it may be necessary to begin injecting or passing the vapor into the mat only after the mat has been substantially calibrated to the product thickness. Preferably, the steam plates should be heated to a temperature above the temperature of the superheated steam used to introduce the superheated steam. In order not to damage the mat by flowing into the surface sides of the mat, it can be held in the calibration and welding unit at least in the region of the steam inlet on the narrow sides with a fixed or running boundary.

In the formation of the mat, it is advantageous if the natural and the binder fibers are scattered by means of scattering rollers on the forming belt to a mat. The spreader rolls may have spikes to optimize mixing or distribution on the forming belt. In some systems, it may be useful to dissolve the natural and binder fibers in front of the spreader rolls using fiberizing rollers to disperse caking or larger conglomerates. The binder fibers may be polyester, polypropylene, polyester or cornstarch. Especially with bicomponent fibers, these materials have advantages. Particularly preferred is polyester as a sheath, since this plastic already melts at a temperature of 110 ° C and can weld the mat. With the method according to the invention or the calibrating and welding unit, it is possible with preference for insulating and / or soundproofing panels to produce a density of less than 100 kg / m ³ . In the production of a semi-finished product, after appropriate assembly, this is pressed in a hot press, the flexible semi-finished product being heated to a higher temperature than in the calibrating and welding unit. This can be used, for example, to melt the second component of the bicomponent fibers, especially when the semi-finished product is pressurized and, if necessary, molded off or molded onto other materials. In a further embodiment, the liquid binders which were introduced before the preparation of the mat, could be cured with a hot press.

in the Area of essential features of the invention is the transition flowing from relatively stiff plates to relatively flexible mats. It is understandable that here also deformable or loose flaky Insulating material can be produced, but starting from the used Materials also plate-like relatively inflexible material produced is.

Further advantageous measures and embodiments of the subject matter The invention will be apparent from the subclaims and the following Description with the drawing out.

It demonstrate:

1 A schematically illustrated manufacturing plant of insulating or soundproofing panels made of wood fibers,

2 the calibration and welding unit after 1 with a top and bottom circumferential mesh belt,

3 the calibration and welding unit after 1 with two top strainer belts for the compaction and welding area,

4 a section through a steam plate for steaming a mat in the longitudinal direction and

5 a plan view of the steam nozzle having surface side of a vapor plate after 5 ,

As in 1 The insulation or sound insulation panels are shown 12 , or the semi-finished products (in the further course of the description, the term semi-finished products is omitted) from natural raw material 34 made in a shredder device 2 to natural fibers 1 is frayed. In a drying device 3 , here shown as a tube dryer, become the moist natural fibers 1 dried to about 2% to 8% moisture and finally in a mixing station 4 with the binder fibers 33 mixed. The binder fibers 33 can be used locally as fiber strands 31 on wheels (not shown) are delivered and by a dividing device 32 in binder fibers 33 be split or become directly as binder fibers 33 purchased from the manufacturer. The mixing with the natural fibers 1 can take place in different ways. In this case, by the way, additional liquid binder can be supplied, which cures by the treatment in the process. When using PMDI as an additional binder, it makes sense in a pneumatic conveying line on the natural and binder fibers 1 . 33 spray or mix only in a suitable mixer. Subsequently, the mixed natural fibers 1 and the binder fibers 33 in a spreader 5 on a form band 6 to a mat 7 scattered and the calibration and welding unit 8th spent. The calibration and welding unit 8th is divided into two main areas, whereby in production direction 22 first the compression area 9 is arranged and then the calibration area 10 , For a calibration and welding unit that meets all requirements 8th Would it make sense between the compression area 9 and the calibration area 10 to arrange a joint on which different compression angles (two-stage compression) can be set. Applicable for all areas to be adjusted is that hydraulic or pneumatic actuators are provided which are able to set the necessary compaction angles, but which have not been drawn for a clear drawing representation. It is understood by the reader that a variety of other necessary features of the device are not realized, but are known in the art. As essential to the invention after leaving the calibration and welding unit 8th becomes the endless strand in a dividing device 11 , preferably a diagonal saw with moving cross-saws or a rotary clipper, in insulation or sound insulation boards 12 divided up.

In 2 is now a first embodiment of a calibration and welding unit 8th shown. The peculiarity refers to the use of only one upper mesh belt 19 throughout the calibration and welding unit 8th , That's what the mat must be for 7 after scattering by the spreader on the lower mesh belt 25 be handed over. It is the teaching of the invention after irrelevant whether Siebgewebebänder or pure screen belts are used or whether even scattered directly on a wire belt. The surrounding sieve fabric tapes 19 and 25 depending on requirements by means of several rollers 14 and pulleys 13 and 16 guided all around. At high compaction levels, it is advantageous to screen cloth belts 19 and 25 as metal fabric tapes. The at the end of the calibration and welding unit 8th necessary steam plates 18 in the calibration area 10 consist of hardened steel or coated aluminum, to the abrasion of passing through Siebgewebebänder 19 respectively. 25 minimize as much as possible. In the compression area 9 can already be steamed by steam plates 15 to be started. This can be advantageous for particularly high mats 7 better displace the air trapped in the mat by the superheated steam. For the lower area are the steam plates 15 also shown only optional.

In a second embodiment according to 3 the upper mesh belt is advantageously divided into two parts. This can also apply to the lower mesh belt, depending on the application. In the compression area 9 Can a metal fabric tape 20 used by an inlet side large heated driven drive drum 13 is driven. The metal fabric tape 20 is preferably made of steel or bronze. Due to the division of the upper circumferential sieve cloth belt, it is now possible to use the second circulating sieve cloth belt as a plastic cloth belt 21 perform. This is beneficial for the vapor transmission, because the plastic fabric tape 21 in the calibration area 10 plays no role in the heat transfer, as the heat through the superheated steam in the mat 7 is introduced. For a two-piece upper mesh belt 20 . 21 in the calibration and welding unit 8th This creates a small gap between the metal belt around the front 20 and the subsequently circulating plastic fabric tape 21 because both have deflection drums 16 / 17 must be led. In the case of an advanced steaming with superheated steam in the compression area, the mat tends 7 no longer be too strong and it should not be necessary to take special measures to hold down the mat 7 hold true. Nevertheless, this gap 28 between the Siebgewebebändern to keep as low as possible, the plastic fabric tape 21 on a very small tail pulley 17 (Diameter about 20 mm) are deflected. Depending on the version of the calibration and welding unit 8th can in the compression area 9 initially not or only slightly compacted. The compression can be set variably, in which the softening area has corresponding lifting devices (not shown) which control the compaction angle and the height of the mat 7 can adjust.

Basically, it may be useful the Siebgewebebänder or metal fabric tapes in the return with a release agent by a release agent application unit 29 to spray or wet with a suitable contact device (roller) and / or a cleaning device 30 ( 2 ). In principle, the use of release agents is also a spraying on the forming belt 6 or the other screen belts before scattering of the fibers and / or wetting of the surfaces of the mat 7 before entering the calibration and welding unit 8th ,

In summary, it can be stated that to support the Siebgewebebänder 19 . 20 . 21 and for introducing superheated steam into one through the gap between the screen cloth belts 19 . 20 . 21 running mat 7 from natural and binder fibers 1 . 33 above and / or below steam plates 15 and or 18 are arranged, wherein for the steam plates 15 . 18 at least one heating device 26 . 27 is arranged, which the steam plates 15 . 18 heats up to a temperature which is above the temperature of the superheated steam. For the supply of steam show the steam plates 15 . 18 at least one steam chamber 41 ( 4 ), which on the Siebbandgewebeseite 19 . 20 . 21 with steam nozzles 40 connected is. The steam chamber 41 is with a device 24 connected to the production of superheated steam or has a connection for a steam supply, wherein the device 24 Specifically, care for the exact temperature setting of the superheated steam. In a further preferred embodiment, at least in the region of the steam plates 15 . 18 a fixed limit 35 and / or a revolving endless bounding band 35 to support the narrow surfaces of the mat 7 arranged, with the limitation 35 and / or the bounding band 35 with ventilation holes 39 can be provided. This serves to ensure that despite high flow rates of the superheated steam on the narrow surfaces of the mat 7 no fibers are torn or expelled. 5 shows a plan view of the Siebgewebebänder 19 . 20 . 21 touching surface side of a steam plate 15 . 18 , where the steam plates 15 . 18 with differentially adjustable zones for setting different evaporation modes, such as wedge-shaped, parabolic, alternating, alternately provided. For example, here is a borderline 42 drawn on the left side of the image for a parabolic inlet zone in the evaporation zone B. On the right side, a wedge-shaped inlet zone is shown, with the steam nozzles 40 in production direction 22 only after the borderline 42 are activated. These are advantageously several steam chambers 41 in length and / or in width in the steam plates 15 . 18 arranged around possibly in a plant different borderlines 42 to realize. However, it is advantageous in a preferred embodiment that a steam plate 15 . 18 is divided into three zones A, B, C, wherein realized in the holding zones A, C no steam injection, but only the Siebgewebebänder 19 . 20 . 21 whereas in steaming zone B steam nozzles are supported 42 are introduced. Preferably, the holding zones A and / or C are about 0.5 m long around blow-outs before and after the steam plates 15 . 18 to avoid. A preferred process application for melting and bonding most plastics in bicomponent fibers recommends striving for as fast as possible above 108 ° C. in steaming zone B and keeping this temperature for at least 30 seconds. Preferably, a vapor pressure of 0.3 overpressure, ie 1.3 bar is developed in the steam chambers.

there should the saturated steam of 107 ° C (according to the steam table) to 93 ° overheating is overheated To obtain steam of about 200 ° C. In a further embodiment it is worth emphasizing that the length of the used Natural fibers and bicomponent fibers either the same or similar or the statistical distribution of the different lengths the two components to be mixed about the same or similar is. This is to ensure that when transporting or Sprinkle the material little or no segregation to adjust. Even if already overheated in the compression area Steam should find use here at least a temperature increase instead and the welding takes place later in the course in the welding area. In an advantageous way could in the context of the invention a Vordeckschichtverdichtung be conceivable in the compression area only the outer layers vaporized around here to allow a certain Vorverschweißung. This could be the manageability of low density Increase material significantly.

1

raw material

2

Zerfaservorrichtung (Refiner)

3

drying device

4

mixing station

5

spreader

6

forming belt

7

mat

8th

calibration and welding unit

9

compression region

10

welding area

11

partitioner

12

insulation or soundproofing board

13

Umlenktrommel

14

platen

15

steam plate

16

Umlenktrommel

17

Umlenktrommel

18

steam plates

19

Siebgewebeband

20

Metal fabric tape

21

Plastic cloth tape

22

production direction

23

product thickness

24

contraption (super steam)

25

Siebgewebeband

26

heater

27

heater

28

gap

29

Release agent application unit

30

cleaning device

31

tow

32

partitioner

33

binder fibers

34

raw material

35

limit

36

spur

37

beaters

38

Fiber opening rollers

39

vent holes

40

steam nozzles

41

steam chamber

42

boundary line

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 patent literature

• - EP 0330671 B1 [0005]

Claims (30)

Method for producing flexible insulating and / or soundproofing panels ( 12 ) or flexible semifinished product for further processing in hot presses, natural fibers ( 1 ), such as dried lignocellulosic material and / or wood fibers, with binder fibers ( 33 ), to a mat ( 7 ) and in a continuously operating calibration and welding unit ( 8th ) are compacted and glued, characterized by the sequence of the following process steps: 1.1 natural fibers ( 1 ) and at least partially made of plastic binder fibers ( 33 ) with a maximum length of up to 15 mm, 1.2 the natural and binder fibers ( 1 . 33 ) are proportionately mixed with each other, 1.3 the blended natural and binder fibers ( 1 . 33 ) with at least one scattering device ( 5 ) on a forming belt ( 6 ) to a mat ( 7 sprinkled, 1.4 the scattered mat ( 7 ) is removed from the forming belt ( 6 ) on a sieve cloth tape ( 25 ) a calibration and welding unit ( 8th ), 1.5 the scattered mat ( 7 ) is used in the calibration and welding unit ( 8th ) with a second screen belt ( 19 . 20 ) and substantially to product thickness ( 23 ), 1.6 into the compacted mat ( 7 ) superheated steam in the calibration and welding unit ( 8th ) and 1.7 in the compacted mat ( 7 ) at least parts of the binder fibers ( 33 ) and to a flexible insulation and / or sound insulation ( 12 ) or solidified into a flexible semi-finished product for further processing in a press. Process according to claim 1, characterized in that the binder fibers ( 33 ) with a proportion by weight of up to 30% with the natural fibers ( 1 ) are mixed. A method according to claim 1 or 2, characterized in that in addition to the binder fibers ( 33 ) liquid binder before, during or after mixing in the mixing station ( 4 ) in front of or in the spreading device ( 5 ) is supplied. Method according to one or more of the claims 1 to 3, characterized in that as a liquid binder Phenolformaldehyde, urea-formaldehyde, melamine-formaldehyde resin, Acrylic resin or MDI adhesive is used. Method according to one or more of claims 1 to 4, characterized in that as binder fibers ( 33 ) Bicomponent fibers are used. Method according to one or more of claims 1 to 5, characterized in that the binder fibers ( 33 ) are present in different lengths. Method according to one or more of claims 1 to 6, characterized in that the binder fibers ( 33 ) in their statistical length distribution in substantially similar length distribution as the natural fibers ( 1 ) are present. Method according to one or more of the claims 1 to 7, characterized in that the bicomponent fibers a core and a substantially enveloping shell component and that the core component has a higher melting temperature having the shell component. Method according to one or more of claims 1 to 8, characterized in that in the calibration and welding unit ( 8th ) are at least partially melted and solidified by the superheated steam only the sheath component of the bicomponent fibers. Method according to one or more of claims 1 to 9, characterized in that in the calibration and welding unit ( 8th ) superheated steam at a temperature above 170 ° C is used. Method according to one or more of claims 1 to 10, characterized in that as superheated steam saturated steam at at least 1.1 to 2 bar absolute pressure in the steam chambers ( 41 ) with an overheating of at least 50 ° C from the steam chambers ( 41 ) of the steam plates ( 15 . 18 ) in the mat ( 7 ) is injected. Method according to one or more of claims 1 to 11, characterized in that the superheated steam from an area side through the mat ( 7 ) and / or from both surface sides simultaneously into the mat ( 7 ) is initiated. Method according to one or more of claims 1 to 12, characterized in that the input and / or the transmission line alternately and / or alternately and / or wedge-shaped or parabolic in the calibration and welding unit ( 8th ) is carried out. Method according to one or more of claims 1 to 13, characterized in that in the calibration and welding unit ( 8th ) superheated steam in a period of 5 to 180 seconds on the mat ( 7 ) acts. Method according to one or more of Claims 1 to 14, characterized in that with the input or transmission of the steam into the mat ( 7 ) only after the essential calibration of the mat ( 7 ) on the product thickness ( 23 ) is started. Method according to one or more of claims 1 to 15, characterized in that in the calibration and welding unit ( 8th ) Steam plates ( 15 . 18 ) for introducing the superheated steam into the mat ( 7 ) which are heated to a temperature above the temperature of the superheated steam used. Method according to one or more of claims 1 to 16, characterized in that the mat ( 7 ) in the calibration and welding unit ( 8th ) at least in the region of the steam inlet or the steam plates ( 15 . 18 ) on the narrow sides with a fixed or contiguous boundary ( 25 ) is held. Method according to one or more of claims 1 to 17, characterized in that the natural and the binder fibers ( 1 . 33 ) with the help of scattering rollers ( 37 ) on the forming belt ( 6 ) to a mat ( 7 ) are scattered. Process according to one or more of Claims 1 to 18, characterized in that the natural and binder fibers ( 1 . 33 ) by spines ( 36 ) on the spreading rollers ( 37 ) are mixed and distributed. Process according to one or more of Claims 1 to 19, characterized in that the natural and binder fibers ( 1 . 33 ) in front of the spreading rollers ( 37 ) with the aid of fiber opening rollers ( 38 ) are resolved. Method according to one or more of claims 1 to 20, characterized in that as binder component of the binder fibers ( 33 ) Polyester, polypropylene, polyester or corn starch is used. Method according to one or more of claims 1 to 21, characterized in that insulating and / or soundproofing a density of less than 100 kg / m ³ are produced. Method according to one or more of claims 1 to 22, characterized in that a manufactured flexible semi-finished product is pressed in a hot press, wherein the flexible semi-finished product to a higher temperature than in the calibration and welding unit ( 8th ) is heated. Use of according to one or more of the claims 1 to 23, manufactured flexible semi-finished in a press for Production of molded parts, characterized in that according to appropriate Packaging of the semifinished product with a press to the semifinished product Pressed a pressed molding. Calibration and welding unit ( 8th ) for the production of insulating and / or soundproofing panels ( 12 ) or flexible semi-finished products with at least one upper and lower endless belt screen ( 19 . 20 . 21 ), characterized in that for supporting the Siebgewebebänder ( 19 . 20 . 21 ) and for introducing superheated steam into a through the gap between the Siebgewebebändern ( 19 . 20 . 21 ) running mat ( 7 ) from natural and binder fibers ( 1 . 33 ) above and / or below steam plates ( 15 . 18 ) are arranged and the steam plates ( 15 . 18 ) with a device ( 24 ) are connected to produce superheated steam. Calibration and welding unit according to claim 25, characterized in that at least in the region of the steam plates ( 15 . 18 ) a fixed boundary ( 35 ) and / or a revolving endless bounding band ( 35 ) for supporting the narrow surfaces of the mat ( 7 ) is arranged. Calibration and welding unit according to claim 25 or 26, characterized in that for the steam plates ( 15 ) at least one heating device ( 26 . 27 ) is arranged. Calibration and welding unit according to one or more of claims 25 to 27, characterized in that the boundary ( 35 ) and / or the bounding band ( 35 ) with ventilation holes ( 39 ) is provided. Calibration and welding unit according to one or more of claims 25 to 28, characterized in that the steam plates ( 15 . 18 ) with differentially adjustable zones for setting different evaporation modes, such as wedge-shaped, parabolic, alternating, alternately provided. Calibration and welding unit according to one or more of claims 25 to 29, characterized in that the steam plates ( 15 . 18 ) form on the inlet side a substantial holding zone without steam injection.