DE1026680B - Method and device for the production of self-supporting bodies from mineral fibers, in particular glass fibers and binders - Google Patents

Description

The invention relates to a method and a device for the production of self-supporting Bodies made of mineral and in particular glass fibers, which are made from molten starting material on a Centrifugal disk generated by one brought into action at or near the periphery of the disk Pressurized gas flow is carried away from the disc and through a finely divided state in a liquid and / or gaseous stream supplied binding agent are bound.

The invention has the purpose of improving the known methods and devices of this type in such a way that that it is possible with them to continuously remove the fibers from the centrifugal disc at will to form more or less wide strips or mats or also to form strands or slivers and by setting and adjusting the flow of pressurized gas and the flow of binding agent largely affect the quality of the fiber products and, above all, the binding agent to be distributed extremely finely and evenly on the surfaces of the individual fibers. Furthermore, through the Invention are made possible, the binding of the fibers and thus the production of self-supporting bodies, such as B. insulating blocks or mats. Pipe insulation (Bowls) and other objects, which can be more or less compressed, too accelerate.

According to the method of the invention, the separating the fibers and from the centrifugal disk a continuous, to-and-fro, limited oscillating motion whose imaginary or real axis is the axis of rotation of the disk.

The flow of pressurized gas is preferably essentially tangential to the periphery of the centrifugal disk or directed to a circle lying to the periphery, the distance of which from the periphery can be regulated.

According to a further feature of the invention, the discharge point of the pressurized gas stream is not only in its radial distance from, but also variable in its height to the periphery of the centrifugal disk.

Depending on the type of fibers to be used and the end products to be produced, the binders are used in various forms, such as, for example, in the form of powder, solutions or dispersions. In the binding process according to the invention, the heat prevailing during fiber production is used to melt powdery binder, in the case of binders consisting of solutions or dispersions, to evaporate the solvent or dispersion medium, and in the case of binder mixtures condensable to plastics, these in the desired more processes and equipment
for the production of self-supporting
Bodies made of mineral, in particular

Glass fibers and binders

Applicant:

Höganäs-Billesholms Aktiebolag,
Höganäs (Sweden)

Representative: J. Schmetz, patent attorney,
Aachen, Wilhelmstrasse 80

Risto Tiitola, Ossi Saartama and Tor Wiksten,

Karhula (Finland),
have been named as inventors

or less final state of condensation, so that after any shaping the bonded fibers to self-supporting bodies no or only a short heat treatment is necessary to give the binder the final degree of condensation.

The use of plastics as binders results in end products of very high elasticity, especially if the fiber material used consists of glass wool. While the invention is not should be restricted to the use of glass wool, it will mainly only be dealt with below Described with reference to glass wool, a plastic-based mixture being used as a binder that is adapted to the type of glass being processed.

According to the invention, the stream carrying the binder is used together with that for carrying away of the fibers serving compressed gas flow and at least approximately in the same direction as the latter with is brought into contact with the fibers produced on the centrifugal disk.

Compressed air is advantageously used for the pressurized gas flow, but according to the invention it can also be used an induced draft come into use, which is carried away by the flow of pressurized gas from the pane Catches wool and, if necessary, transports it onwards.

The binding agent can be applied to the wool by means of the compressed air flow are fed to the at the same time

709 910/366

3 4

Removal of the wool from the disc is used, with a suitable device for carrying out the

the pressurized gas flow itself as a carrier of the binder method according to the invention consists of one can be used. For the supply of the binding combination to a device known per se However, by means of a separate, with the former production of fibers from molten glass or approximately rectified liquid or gaseous 5 similar masses by means of a centrifugal disk Electricity can be used. at least one near the slinger

If, during operation, the nozzle is a horizontal nozzle for ejecting a pressurized gas, pre-continuous, reciprocating oscillating movement of compressed air flow, which nozzle or nozzles Execution, the speed of which is adjustable and around the axis of rotation of the disk as imaginary or which is limited to an adjustable range, io real axis continuously limited back and forth the disk axis as imaginary or real oscillatable as well as in its radial distance from the Swing axis is used, so the wool can be in the form of a disc periphery and in its altitude and even mat with precisely defined edges inclination to the plane of the pane is or are adjustable, The pressurized gas flow for the cutting can be delivered to the storage area on a driven conveyor gene, which expediently consists of a sieve belt and 15 and removal of the fibers ejecting nozzle on the side facing away from the centrifugal disc in pieces with a second, essentially identical one to take up the fiber stream serving ended nozzle through which the binder for the Suction box lies. The width of the mat can be fed by fibers.

Regulation of the oscillating movement and its thickness by the following is a device according to the invention

Regulation of the speed of the conveyor changed ao explained on the basis of the drawing. In this shows will. The resulting during the fiber production process Fig. 1 is a schematic plan view of the centrifugal

The intense heat causes the evaporation of the in the disc with a bounded around the disc axis Liquid contained in the binder mixture. Swiveling blower nozzle,

correct selection of the liquid content of the binding Fig. 2 a schematic representation of two

burning of the plastics is prevented by means of an embodiment of an overall device Degree of condensation within wide limits by device according to the invention,

Lets regulate the influence of the heat. Fig. 3 a structural design for the

The suction box and the conveyor can also order the movable and adjustable nozzles, and be designed that instead of a mat for example Fig. 4 is a cross section along line IV-IV of the

wise a continuous fiber strand of the desired 30 Fig. 3.

Dimensions and desired cross-sectional shape or In Fig. 1, 1 is the slinger and 2 is a

a tubular product is also obtained. Nozzle through which a pressurized gas is ejected in the direction of the arrow by arranging two rotating rollers on the stream, which can be used for the division and path-free end of the conveyor 35 The nozzle 2 is directed tangentially to a circle 3, the mandrel is wound, which surrounds the distance χ in the gap between the periphery of the disk 1 in a changing two opposing rollers. The nozzle 2 should be arranged in the area where a tubular body at the angle β can be continuously oscillated around the axis of the disk 1 of the desired wall thickness and by the application of pressure.

achieved desired density is generated, which according to Fig. 2, two nozzles 2 α and 2 b are pre-cut in the longitudinal direction, for example, as seen, the discharge openings of which are superimposed pipe insulation can be used. The conveyor and blowing in substantially the same direction can be designed to be a desired 4 the molten mass flow exerting pressure on the mat. If the mat is not passed into centrifugal disk 1 and plates are to be cut at its periphery, the for- 45 can be thrown off with conversion to fibers, which or special whale used for this purpose . B. Pressure pins with semicircular pressure surfaces converging air flow through which the fibers can be broken up and worked away so that coherent bodies are abducted. The lower nozzle 2b provides a speaking form which, when separated from each other by a liquid or gaseous stream of binder, is desired to be sprayed onto the fibers. The nozzles 2 a, 2b form diameter. According to known methods are combined with one another and within the bound fibers can also be drawn to and fro in a strand-like shape of a desired angle continuously around the axis and spun or twisted in the centrifugal disk 1. Of be. the size of the oscillation angle also depends on the

When performing the method according to the 55 angle, within which the fibers from the Invention can be carried away in a known manner downwards on the slinger, and the width, Blowing stream directed towards the periphery of the disc, in which the fibers are deposited, men with a blowing stream guiding the binding agent

are used, which expediently converge directly under fibers to form a strand 5, the innerder Disc is ejected and caught essentially 60 half of a conical funnel 6 and the same direction of flow as the former or one between rollers 7 onto a conveyor belt 8 Has flow direction that is inclined slightly downwards.

is directed against the falling fibers. As can be seen particularly from Figs. 3 and 4, is

Any post-treatment to the final concentric around the centrifugal disk 1 a hollow hardening, which in any case only has a short duration to be 65 wreath 9 arranged in which a ring 10 is slidably attached, can either be arranged in a separate furnace. On this sits a radially outwardly or in an oven, the arm H ₁ protruding with the conveyor and carrying the nozzles 2 α, 2 &, which is connected to itself or to the shaping means and in under the ring 9 to the centrifugal disk 1 to the Excess heat can extend out of the fiber production and its ejection openings can be used tangentially for the generation process. 70 disc periphery or to a concentric too

this lying circle (Fig. 1) are directed. A holder 12 seated on the arm 11 enables the nozzles to be adjusted in terms of their radial distance from and their height position to the disk periphery. The angle of inclination of the discharge openings of the nozzles to the plane of the pane can also be changed. The nozzles 2 a, 2 b receive their reciprocating oscillating movement, for example, through the rod 13 of a hydraulic pressure cylinder 14 with a variable piston stroke engaging the holder 12.

Claims (9)

Claims 1. Process for the production of self-supporting bodies from mineral and in particular glass fibers, which is generated from molten raw material on a centrifugal disk, by an or pressurized gas flow from the disk applied near the periphery of the disk carried away and by a finely divided state in a liquid and / or gaseous stream Binding agent brought in are bound, characterized in that the one dividing the fibers and pressurized gas flow leading away from the centrifugal disk at the ejection point a continuous, reciprocating, limited swinging motion is given, its imaginary or real Axis is the axis of rotation of the disc. 2. The method according to claim 1, characterized in that the compressed gas flow is substantially tangential to the periphery of the centrifugal disk or to a concentric to the periphery Circle is directed whose distance from the periphery is adjustable. 3. The method according to claims 1 and 2, characterized in that the discharge point of the Pressurized gas flow not only in its radial distance from, but also in its altitude to the periphery of the centrifugal disk is variable. 4. The method according to any one of claims 1 to 3, characterized in that the pressurized gas stream is used simultaneously to make a binder in the form of a powder, a solution or a Spray dispersion onto the fibers. 5. The method according to claim 4, characterized in that the prevailing in the fiber production Heat is used to melt the powdery binder or to evaporate its solvent or dispersant. 6. The method according to claim 4, characterized in that for spraying the fibers with Binder in addition to the pressurized gas stream used to break up and guide the fibers away a separate, roughly rectified liquid or gaseous stream is used. 7. The method according to claim 4, characterized in that the division and routing the pressurized gas stream serving fibers is itself used as a carrier for the binder. 8. Device for performing the method according to claim 1 or one or more of the Claims 1 to 7, characterized by the combination of a known device for Production of fibers from molten glass or similar masses using a centrifugal disk with at least one nozzle for ejection located in the vicinity of the centrifugal disk a compressed gas flow, preferably compressed air flow, which nozzle or nozzles around the axis of rotation the disc as an imaginary or real axis can continuously swing back and forth to a limited extent as well as in their radial distance from the disk periphery and in their height and The inclination to the plane of the disc is or are adjustable. 9. Device according to claim 8, characterized in that the pressurized gas flow for the Splitting and guiding the fibers ejecting nozzle a piece with a second, im essentially unidirectional nozzle forms through which the binder for the fibers is fed. Considered publications:
German patent specifications No. 865 641, 913 873, 179. 1 sheet of drawings © 709 910/366 3.