DE1635617A1 - Process for the continuous production of non-woven felts in sandwich form - Google Patents

Description

■ ■ - ■■■■■ ■■■ '■. <

Bernard RÜDIOFF, in Marckolsheim (Bas »Rhiη, France)

Process for the continuous manufacture of non-woven Sandwich shaped mushrooms ».

Priority: France, February 29, 1964 '

The invention relates to the continuous production of non-woven felts in sandwich form Output of fibers of any type and origin, which, depending on their type, for sound insulation .oäer thermal insulation are intended and both in the manufacture of machines of various kinds as well as in the construction industry can be.

It is well known that upholstery and insulating materials are continuously produced from a wide variety of lextile fibers, and it is possible to add additives _{by adding VO n}

9830/1507

Bass

these fibers do not; to make woven fabrics *

The invention aims the production of non-woven felts in sandwich form, which by two similar or different types of felt layers are formed, which can also contain additives, and between which one A layer of any suitable material is applied in order to give the composite felt structure new properties, which open up new areas of application for him.

The inventive method for production such a sandwich-shaped non-woven felt consists in, according to a known method, two layers of one to produce non-woven felt, which have a greater or lesser density and which by rolling textile fibers into Flakes or in a plucked state are formed, which are dusted with powdery synthetic resins and, if necessary, with powdery Additives, e.g. fire retardants, are mixed, with suitable amounts of the most varied between these two layers Materials are introduced to z * B · the specific gravity of the To change sandwich arrangement or their sound insulation ~ and To improve thermal insulation properties and, if necessary, their strength to increase, whereupon the sandwich produced in this way is transported in a manner known per se into a polymerisation tunnel, in which the treatment of the product is completed.

The invention is explained below by way of example with reference to the drawing, the single illustration of which schematically shows a machine for carrying out the invention Process for the continuous production of felts in sandwich form shows. ·

009830/1507

'ty <Ü * O * U S / = YY = _ -

The two devices _9, each of which converts the fibers into a layer, are symmetrical and thus arranged in alignment in opposite directions. Each device contains an automatic loading and weighing device 1, 1 *, which transfers the opened fibers onto an endless conveyor belt 3? 3 ^S brings, above which the device 2, 2 ^f for dosing the synthetic resins and, if necessary, the hopper for the delivery of additives are located * A pair of feed rollers 4 _S 4 "brings the fibers thus provided with additives to a drum 5 _S 5% strong steel tips is provided and decreases the fibers at their fast rotation, and separates and hurls in a closed chamber 6 ₉ 6 ^S _s inwel'cher from a perforated drum 7, 7 ^S - be sucked "the Fortscaleuderung and aspiration the preparation allows a intimate mixture of the fibers with the synthetic resin dispensed by the metering device and, if possible, with additives, in particular fire retardants, the mixture is pressed by a roller 8 _S 8 'on the drum 7 ₅ 7 ⁵ from j which with one of a roller 10, 10 ^s tensioned endless grid 9 »9 * is provided.

A fan 11 is used to suck in the mixed and resin-coated fibers, which thus form the two rather compact layers 12 "and 12 ', which are driven by the endless grids." Each drum 7 "7" has a shield 19, 19' »Which prevents the fibers of the layers 12p 12 'from being sucked in when they have passed under the press rollers 8 _S 8'. ".'-- ■". "■■

The space between NEN drums 7 and 7 ^! can be regulated to either aen the exit of the two layers 12 and 12 *, the thickness of which is determined by the position of the press rollers

0098 30/1507

8 and 8 'can be regulated to be pressed against each other, or to make the exit of these two layers 12 and 12 ^{1 in} such a way that a gap remains between them, which allows different materials to be introduced through the dosing device 13 to form a sandwich «

In both cases, the layered product is placed on a level at the exit from the endless grids 9 »9 ¹ . brought right endless conveyor belt 14, which brings it to an inclined conveyor belt 15. The double endless conveyor belt 16 places the product in a Polymerisierofen $ 17 where the ™ between two endless grid-like conveyor belts compressed sandwich is subjected in manner known per se a hot air stream _s which is blown through upper and lower nozzles 18 by the conveyor belts and the sandwich.

The selected for the two devices for forming the layer arrangement allows two layers of the same - or to form different thicknesses and in particular to produce various materials, for example ^e, a layer of cotton fibers and the other layer of fibers of jute, V / olle ο "like. “The different thickness allows the density of each layer and thus the specific weight to be changed. One of the layers can contain additives, e.g. fire retardants «

Thanks to the presence of the dispenser 13

A non-woven felt in sandwich form can easily be made by placing between the two similar or different Layers of the same or different thickness suitable materials are introduced, e.g. minerals, slag, asbestos, Wood flour, foam or the like. Which, if necessary, with certain

009830/1507

- ί? ™ * ■

• Resins are mixed. You can either do the specific Weight of the sandwich arrangement - increase or your. Soundproofing Improve s and thermal insulation properties.

Ausserdeni enables the invention

Apparatus, if necessary. To get between the two layers of fiber reinforcement, to enlarge the tensile strength of the sandwich arrangement, or to provide it with a certain stiffness "This reinforcement may be a fabric made of textile material or of metal, or even a network of glass filaments _s metal thread 0 _or the like _e which are arranged in the longitudinal direction of the product β - ä

The above process thus enables the continuous, simple, expedient and cheap production of products of very different types, which can find numerous applications in the most varied of fields «.

009830/1507

BATH ORIGINAL

Claims (2)

Claims 1.) Process for the continuous production of non-woven mushrooms in sandwich form from textile fibers of any type and any origin, characterized in that, according to a known method, two layers of a non-woven mushroom are produced, which have a greater or lesser degree of compactness and by rolling textile fibers in flakes or in a plucked state are formed, which are dusted with powdery synthetic resins and possibly with powdery additives, e.g. _e fire retardants, with suitable quantities of various materials being introduced between these two layers, e.g. to change the specific weight of the sandwich arrangement or to improve its sound and heat insulation properties and, if necessary, to increase its strength, whereupon the sandwich arrangement produced in this way is fed in a manner known per se to a / polymerisation tunnel in which the treatment of the product is completed. 2.) Device for performing the method according to claim 1, characterized by two symmetrically aligned in an opposite arrangement arranged devices for layer formation, each of which has an automatic loading and weighing device (1, 1 ') for the fibers, a device (2) for the dusting of resins, if necessary, a metering device for additives, a closed container (6, 6 ') with a spiked drum (5, 5 ¹ ) for exploring the mixture of bases and resins, a suction fan (11, 11 *) ) and a pressure cylinder (8, 8 ') working on a perforated drum (7>7') 009830/1507 depending on the more or less compact layer with the desired th adjustable thickness emerges from each of these devices, with a metering device between these two devices (1-3) is provided, which introduces a variety of materials between 'the two layers' and, if necessary, reinforcement, with endless conveyor belts (Ή, 15s 16) the sandwich thus formed the polymerization tunnel (17) feed * in which the Pils in Sandwich shape between two endless grids with one penetrating it Is exposed to a stream of hot air * 0 0983071507 Blank page