DD160817A3 - METHOD FOR PRODUCING MINERAL WOOD PRODUCTS WITH VERY RIGHT FIBER ORIENTATION - Google Patents

Abstract

The invention relates to the increase in compressive strength of mineral wool products perpendicular to the product plane by vertical fiber orientation. It aims at a loss-free, fully automated production of products with fibers oriented perpendicular to the product level. In contrast to known, very expensive process of the subsequent lamination of finished on the main production plants products already nichtausgehaertete raw fiber fleece in the area between fiber settling chamber and polymerization pre-compressed, chipless cut into strips, mechanically rotated by 90 degrees and continuously in the same operation again to endless fiber fleece united. If necessary, the surface of the mineral wool nonwoven leaving the fiber settling chamber can be wetted with an additional binder film which, after the laminating process, produces an additional strength in the end product. With this process integrated into the production process of the mineral wool plants, it is possible to apply laminating not only to products with high requirements for compressive strength but also to other products whose density can then be lowered while maintaining the strength values.

Description

invention description

a) Title of the invention

Process for the production of mineral wool products with vertical fiber orientation

b) Field of application of the invention

The invention is applicable to all mineral wool plants which operate according to the dry process. It can be used on all products leaving the main production lines as flexible or plate-shaped intermediate or final products.

c) Characteristics of the known technical solutions Mineral wool products produced by the dry process are randomly arranged fiber fleeces with fibers oriented technologically essentially parallel to the product plane. The gross density of these fiber webs

-3 carries about 30 - 250 kgm, the content of binders approx.

1 - 20 mass %.

The disadvantage of these products is their lack of strength, especially perpendicular to the product level.

Only mineral wool panels with densities of 170 -

-3 '

250 kgm and binder contents> 8 mass % have higher compressive strengths, which are suitable for certain applications. The disadvantage, however, affect the high mass, the considerable production cost and the low volume throughput of the production facilities.

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Bine significant improvement in compressive strength perpendicular to the Zuchtbenbena can be achieved by vertical alignment of the fibers. For this purpose, according to known methods, a subsequent Lame 1 herring made d. h., the iir certificates are in separate operations on the main production lines in separate operations by sawing ο, Ä. divided into strips, rotated by 90 ° and reassembled in various ways »Disadvantages of these methods are the high if'ertigungsaufwand and the Technologically induced material losses (sawing, Hestverschnitte, etc.). Depending on the production technology, also documents for gluing the lamellae are needed.

Due to the high production costs, the use of this type of Laiaellierung is economically justifiable only for certain specialty products with special requirements for compressive strength. Furthermore, various methods are known in which a Lameliierung is made prior to the curing process of the binder, both longitudinally and laminated across the production line.

All of these previously known methods can be realized on special production equipment on which only a narrow range of laminated special products can be produced.

d) Object of the invention

The present invention aims at a loss-free, fully automated production of products with vertically oriented .Fasern, depending on the application different Srzeugnisie-strengths and dimensions are feasible.

JO By integrating into the production process of normal main production plants, the cost of laminating compared to conventional processes should be reduced so that the application of the process is not limited to products with high pressure resistance requirements.

~ $ 5 limits, but also extends to other products

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which can then be produced while maintaining the strength values at a lower density. It is important to ensure a wide product range and the possibility of producing normal and laiaellierter ER- certificates on the same production line,

e) Presentation of the essence of the invention

The disadvantages of known lamination processes are caused by the fact that their realization is in any case associated with expensive investments. Either downstream of the main production process, separate and not in coordination with the main production process, Laiaellieranlagen or fully specialized main production facilities for the production of lameliierter products are required. In contrast, according to the invention the lamellae is incorporated directly into the manufacturing process of normal production plants by the non-cured raw fiber fleece in the area between Fas he settling chamber and PolymerisatioüSi-canu.ier pre-compressed and cut transversely to the production direction in otreifen, then rotated by 90 ° and in the same Operation 'continuously be united again to endless .Faservlies. The juxtaposition of the lamellae can be assisted by means of horizontal directional projec- tion devices. The density of the products is determined by the coordination between pre-compaction, slitting width of the slats and production speed before and after the Xatuellier'einrichtung. Depending on the desired quality of the product, the surface of the fibrous web emerging from the fiber settling chamber may optionally be provided with an additional binding agent.

JO medium film, which then produces additional strength in the lind product after the lamination process.

f) Example of an experiment

Raw fiber nonwoven leaving, for example, a transport speed of 2 ni / aiin and having a thickness of ^ JO in the 5'5 fiber settling chamber, is precompressed to 200 mm thickness and separated into strips of 100 mm width.

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After twisting the strips by 90 °, the translocation velocity must be commensurate with the ratio 200 /. ^ be increased to .4 m / min. The dipke of the fleece entering the polymerization chamber is then 100 mm and, to ensure a flat surface in the cleaning chamber, is compacted once again to 80 mm , which corresponds to the final material thickness. For all product thicknesses, it should be kept in mind that the cutting width of the fins is only slightly greater than the thickness of the finished products so as not to reduce the degree of fiber orientation by the compaction in the polymerization chamber more than necessary. The ratio between pre-compaction and web thickness at the exit of the fiber settling chamber can be varied. The density of the products is influenced by both parameters. A special example is the cutting of square lamellas, ie the thickness of the pre-compacted fleece is equal to the cutting width of the lamellas. These

 The variant has the advantage that the central main drive can be maintained with the same production speed for the entire production conditions as in the production of normal products.

Claims (2)

Z L Ό D L I Bridge saris pruch 1. A process for the production of mineral wool products with vertical fiber orientation by Laniellierung the raw fiber web transverse to the production direction between i'aserabsetzkanimer and polymerization, characterized in that the Kohfaservlies is pre-compressed before dividing into strips and the pre-compaction, the cutting width of the Lameliiereinriebtang and the belt speeds before and after Lamelliereinricbtung depending on the density and thickness of the products to be produced matched. 2. A process for the preparation of mineral wool products with vertical .Faserorientierung according to item 1, characterized in that the uniform belt speed of the production plant as in the production 'normal products maintained and the cutting width of the Lamelliereinrichtung is set equal to the thickness of the pre-thickened iSohfaservlieses. J. A process for the production of high temperature fiber-oriented mineral wool ores; to Pun. ':! 1, in that a certain width of slat lamination is set by the thickness of the precompacted raw fabric, and the ratio of sliver velours before and after lamination is given by the ratio of width of cut to thickness of precompressed sheet is determined.