SE203373C1 - - Google Patents

Description

Inventor: G B Matter The present invention relates to the felting relit for felting fibers from gas suspension on a continuously moving, filtering conveyor, the sum of which passes through a deposition zone. The invention relates, respectively, to a dispersing head with perforations for separating the fibers from each other, immediately before they are felted.

According to an edge method for removing fiber blankets deposited from air, a perforated dispersing head is used, which contains a stirred fiber mass at overpressure, which inass is reacted continuously. A constant air flow. passes through the head ooh Maser has individual fibers from, this to the deposition zone. A suitable stirrer is arranged in the hood so that the mass is porous and uniformly accessible to the desired, even output. The conditions must be transversely across the mobile conveyor at the dispersion, gshuvu.dett, while they can IP: ahem in the longitudinal direction parallel to the direction of movement. A semi-cylindrical clispering head towards the shaft transverse in relation to the movable conveyor lamps: itself immeasurably meets these conditions.

The air pressure in the head causes an exhaust air stream to flow rapidly through individual fibers from the head to a deposition zone where the Mien is formed. The deposition zone is achieved by passing a continuously moving filter, such as a wire, over a surface, which is measured under pressure, and the dispersing head is placed close to the suction surface and essentially completely the suction surface of the suction surface during operation. The pressure in the head and the negative pressure under the wire, are adjusted so that a continuous and Dupl. at 41 d: 2; 54 c: 1 constant fibrous airflow possum. through: aims: farm to the deposition zone and there.r is filtered for formation of the blanket.

When forming a continuous mat by filtering on a movable mechanical filter, the -exposed surface changes from that which blacks against the actual mechanical filter in the case of the externality, to one. surface, WHICH corresponds to the • degenerate motto: a i, the second extreme case. The increasing thickness of the deposited mat varies with the velocity of the vertical air stream from the far end of the deposition zone to the eighth spirit of the deposition, which gives rise to a lultstrom, which emanates from and from the deposition zone.

. For efficient felting of the fibers inside the mat, the suction system transports more air to the pressure system, the fibers coalesce through the perforated head. This means that further ink penetrates into the deposition zone Iran's surroundings, whereupon the air strammeus' retrieved node within the deposition zone Zikkas.

This air stream acts as a wind screen in the deposition zone, where the tiber stream from the dispersion head is wind screened, so that the fine fibers are transported and deposited at the rear end of the deposition zone. The formed mat shows a stratification of the fibers from the top to the bottom, so that the top has a higher ratio between coarse and fine fibers and the surface becomes more uneven than one might expect with regard to the fiber distribution of the original fiber mass.

In the manufacture of tata, pressed products of carpets deposited from air, part is often very important, that the surface Or smooth and smooth. This is especially true if such products are to be loosened with coatings or coated with decorative materials, and then large fibers or bundles of fibers on the surface of the carpet appear through the coatings and the appearance of dangers. According to the present invention. only irregularities with the formation of surfaces with a high proportion of coarse to fine fibers, but also a mat with a surface layer with a better ratio of fine to coarse fibers than one would be able to get used to with regard to the original fiber distribution, so that one get a smoother and more uniform surface on the product.

An object of the invention is to provide a laft felting device, where the fibers Elias, to a mat with regulated layers with an ancient predominant graving to fine fibers. The device according to the present invention for depositing a felted fiber mat on a rotten surface by depositing fibers on the surface of a felt. pneumatic felting apparatus with one or more semi-cylindrical felting hooks can be drawn therefrom, that at least nit: of the fillnin, gshuvudena ph its surface is farsett with a main group lay hal with ja, mn size and such (dimension, that the coarse fibers can -pass. through the tail, - and a second group of smaller, jamust-sized halls with (such a dimension, that they only drip out finer fibers, the second group of halls Or being placed in front of and / or behind the first group and at a distance from named first group, vii-let Or starre an the distance between the tail in densaanma.

The invention will be described in more detail below with reference to the accompanying drawings, in which Isom (examples show belly embodiments. Fig. 1 is a vertical longitudinal section and shows the distribution head and various parts of a felting apparatus. Fig. 2 is a vertical Fig. 3 shows a developed plan view of an embodiment, of the perforated felting head, Fig. 4 is a vertical longitudinal center through an embodiment with a single head.

The apparatus according to Fig. 1 comprises an an (dlos Tim. 10 between coils 11 and 12, of which mine a Or driven. The wire 10 Or suitably drawn in a horizontal plane Over a suglada 13 placed under the vira.ns 10 owe part. Sugladan. Or through a conduit 14 connected to the suction, by the side of a flake not shown. Overpressure with suitable means, not shown, for example a connection with the pressure side of a flat.

The lower uncle Or is disposed with a perforated head, suitably a semi-cylindrical dispersion (head 16. Over a sector of about 1000 Or the periphery is perforated with a halo 17 of suitable size for dividing the fibers into individual fibers at the pass). fra, 'n head 16 to viran 10. Above Or .and frainfor this sector at 100 ° flames a further, sector with less hal 18. When working with fibers, (S0111 ha (defibrated to Mainly individual fibers, Mien 17 ha a (diameter (of -c: a 8 nun, niedan tail 18 ha a diameter .of c: a 3 mm. The more the tail are, the greater the capacity liar the system. HO-lens size, shape and plaeering can vaticra starlit.

As shown in Fig. 3, the perforated head consists of about 1.6 mm thick, hot-rolled steel plate with a brecid 144 can and a length of 131 cm. Nineteen, rows of hall 17 with a diameter of 8 min Ore arranged along the head 16 with a center air stand air 16 min and arranged in adjacent rows. 76 mm in front of the front halra2den 17 Oro arranged twelve halra rows 18 with a diameter of 3 mm and .centruma.vstandet 9.5 nam with Wen forstallda in adjacent rows. These dimensions can vary according to the properties of the processed fiber and other variables.

Inside the dispersing head is a coaxial rotor 19 with wings 20 which, like lambs, are obligated to have nylon brushes 30 for stroking the fibers through straw. The rotor is driven by a lamp, not shown motor to move with Mgt speed, for example 175-600 r / m. The direction of rotation 'Angell depends on variables in the felting process and the properties of the produced carpets. In the embodiment shown in Fig. 1, the rotor had to rotate clockwise or counterclockwise. andlosa Timm Owe part.

The area of the Indian dispersion head and the upper side of the spiritless wire form the deposition zone and are generally designated 21. This zone Or is suitably delimited by side plates 22 and 23 and a rear plate 24 is allowed to reduce the disturbing effect of air drums on the blanket 82 formed as shown .

Skarn has been mentioned above blowing a sorting air stream 25 from the front and balcht mom this deposition zone. By providing a perforated head 16 with two series of halls 17 and 18 of different sizes and with the set 'of smaller halls 18 placed (one piece in front of and above the set of large halls 17 at (dispersion head, its 16 periphery, a part). Of the fine fibers 26 to be separated from the original mass of agitated fibers (and in spite of the sorting air stream calla i shd, ana ban: or that they do not cause flagon storm overlapping air to the sedimenting main fiber stream 27, so that the fine fibers are deposited as a surface layer on the seam.

When examining the fiber size distribution at different levels in a mat formed during use of a felting head, of the type shown in Fig. 1, the following percentage distribution is obtained, determined as the amount by weight percent retained on sieves of different numbers.

Sight analysis (Tylers scale) in% Original on 8 on 34 on on 80 through fiber 13.6 44.6 20.0 3.2 18.6 Upper third of = titanium 6.8 40.6 23.0 5, 0 24.6 The lower two thirds of the carpet 14.8 43.6 20.0 4.2 17.1 The great improvement in the smoothness of the carpet surface is underlined by the softening of the sieves no. 8 oeh 34, the remaining fractions Morn den Owe third of the carpet in comparison with the okningen: of the finer fractions a.veni. Relationship to the levels of, the same fractions in the original fiber.

The device, according to the present invention, can operate for a long time. varying values of different variables to achieve predetermined, different results. The number of neck sizes may not be limited to two, but other neck sizes may be used to provide mats with other compositions. The distance between the inserts of different sizes of hall can vary depending on such variables as the flow rate of the air, the size of the deposition zone and the desired properties of the carpet.

A modification is shown in Fig. 2, according to which the felting heads are arranged one after the other to provide a mat of layers of fine fibers on each side. For this purpose, the rear head 28 is provided with a slightly smaller head 29 arranged at a distance from, above and below the head 17. The bottom 19 should further rotate in the opposite direction to the rotors in the rear other heads, ie. clockwise,. The center head may have at least one neck size, while the front head is similar to that shown in Fig. 1. In this embodiment of the invention, a three-layer mat is provided, where the surface layers have a higher ratio of fine fiber to coarse fiber than the middle layer, or the core.

A similar, three-layered mat can be achieved by using a single dispersing head with two sets of fine slides, one set of which is placed above and in front of the norm: 1st tail and the other above and hook. These, Donna placement, are particularly advantageous. ,, when you want thin carpets.

If relatively large amounts of fibers have to be transported through the dispersing head, which in turn requires larger openings or slippage in the head, it may be impossible to achieve efficient separation by fitting the seam between the batches of different slippery slides. If the distance joke is sufficient, according to an embodiment of the present invention, a baffle 31 may be placed between the neck sets 17 and 18, as shown in Fig. 4. The length of the baffle 31 is adjusted so that the air stream can load the fibers. make the smaller, front tail 18 in the dispersing head to carry the fine fibers 26 over and past the ball em and airs atta dam on the mat, upper side.

The invention is limited to the embodiments shown and described above, which can be modified without exceeding the scope of the invention.

Claims (5)

Patent claim: 1. Device for depositing a felted fiber mat on a movable surface. (10) by depositing fibers on the surface of a pneumatic felting apparatus (1b) with one or more semi-cylindrical felting heads (16), characterized in that at least one of the felting heads (16) on its surface is provided with a main group of halves (17). ) with Alma size and, such a dimension, all the coarser fibers can pass through the Mien and a, second group of smaller, even-sized halls (18, 29) with such a dimension, that they only relax finer fibers, the second group of hal is placed in front of (18) oeh / or behind (29) the first group and at a distance from the said first group, which Sr stone an the distance between the hal in .densamina. 2. A device according to claim 1, characterized in that But in each group Oro arranged in parallel panes, which extend perpendicular to the direction of movement of the movable surface (10), each tail in adjacent rows are shown in relation to each other. 3. A device according to claim 1 or 2, characterized in that the halo groups are arranged at a distance from each other to form an unperforated gap with a width of approximately 76 mm between the last row of larger halos and the first radon smaller. slippery. 4. Device, according to claim 2, characterized in that the Mien in the first group have a diameter of 8 mm and that the Mien 4 are arranged with a center distance of about 16 mm, the raw straw in the second group having a diameter of 3 mm and aro arranged with a centrumaystan.d. of 9.5 men. Device, according to n. Fig. Of the foregoing patent claim, characterized in that a baffle (31), which is fixed on the outside of the felting head (16), between the halter groups and the slider, extends from the delta towards the movable surface (10). Request publications: Patents from Sweden 119,507; Germany 920 209; USA 1 882 599, 2 912 723.