SK174391A3 - Device for layering of fleece from vertical deposited web - Google Patents

Abstract

The device for pile layering perpendicularly to the plane of the formed nonwoven, which is intended especially for the production of high-volume textiles, consists of a working cylinder (5) composed of working discs (6) having upsetting spikes (7) and of an articulated saucer mechanism for feeding, in which the individual discs (2) of the feed cylinder (1) engage between the working discs (6). <IMAGE>

Description

Technical field

The invention relates to a device which enables the continuous production of textiles in which the major part of the fibers is oriented vertically, i. predominantly perpendicular to the plane of the fabrics, thereby allowing a high bulkiness of the fabrics and the associated high thermal and acoustic insulation capability. The device makes it possible to create a precisely defined structure of the fiber layer from the web and other planar formations even at extremely high speeds and after the heat treatment the bonded fabric of new utility properties.

BACKGROUND OF THE INVENTION

It is generally known that the decisive influence on the properties of nonwoven fabrics is their rom is the fiber orientation, formation properties and structure, the main parameterThis orientation affects both density and density-dependent properties such as heat and noise insulating properties in addition to air and liquid permeability .

This philosophy has resulted in a fundamentally new method for producing fiber layers and bonded fabrics by laminating a web from a carding machine in the form of vertically arranged slats. By lamella is meant a curved section of a web or other fiber layer as shown in FIG. 1 feature 17. Two basic methods and apparatuses, protected by AO 269300 and AO 273997, are known for using this method, which achieves not only high bulkiness along with the accompanying functional properties of the fabric, but also good resistance to repeated compression. assembly of two molding elements, a molding bar provided with tips on the working part and a push bar fitted with needles along the length. The molding bar is analogous in its function of the ridge when folding the web from the carding machine cylinder, it moves vertically and senses the vertically fed web to the discharge conveyor over which the grate is placed. As the ridge moves back, the guide needles of the bar will catch the web in the down position and the bar will push the web into the gap between the conveyor and the grid by its horizontal movement. The coordinated movement of the ridge and the bar allows the web to be folded vertically to form a fleece, respectively. a fabric with a predominant proportion of fibers oriented perpendicular to the plane of the fabric.

The second device, which is described in AO 273997, consists of a roller equipped with shaped spikes of bent wires or metal plate cuts spaced at certain intervals, and of a grid of wires extending between the spikes and opening above the conveyor. The web, which is fed from above, is pushed into the channel formed between the conveyor and the horizontal part of the grate as the roller is rotated.

Both the devices according to AO 269300 and AO 273997 are capable of forming a web and fabric of unusual fiber orientation with a significantly high bulkiness and a number of advantageous functional properties. However, both have their shortcomings, which make it impossible to use the essentials that a simple assembly line offers. It is primarily the use of high-performance fleece forming machines on which the economic efficiency of the entire production depends. The device based on the vibration principle works reliably in addition at web speeds of 100 m.min ^-1 . This corresponds to a frequency of about 1500 oscillations. per minute. However, the performance of the top fleece generators reaches up to 450 kg.min ^-1 . At a web weight of 20 g / m ² , this would require over 2,000 oscillations per minute. So far, there is no known solution to achieve this performance using the described principle.

The rotary principle according to AO 273997 has other drawbacks. The decisive factor is that the folding and draining of the web depends on the amount of friction between the scanned web and the surface of the working elements, i. shaped wires or die cuts. With their smooth surface, the device works reliably only at lower speeds and with a lower degree of densification. By roughening the surface it is possible to increase the production speed, but with increasing speed the fibers from the web of the bottom of the grate penetrate up to the rolling on the rotating roller. In addition, the device of this concept leads to the formation of lamella stores under a certain inclination, thus not making it possible to produce perpendicular laminated webs and textiles with a thickness of more than 15 mm. It is therefore only suitable for products with a thickness of practically less than 10 mm and when used in an assembly with card machines up to 80 kg / h.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The present invention is based on a new design of a rotary vertical web spreader from a carded web carding machine or other web formations which allows to operate at the maximum known web feed speed and to create precisely defined sizes and shapes of slats forming a fiber layer ready for heat treatment. It also allows the controlled placement of the slats at different angles according to the requirements of the fabric properties.

The device according to the patent comprises a feeding device consisting of the feeding discs 2 shown in FIG. 1 and 2 with a roughened surface which fit between the pressing mandrels 7 of the working rolls 6 of the working cylinder 5. The shape of the pressing mandrels 7 is selected such that the gap between the pressing and the reverse side defines the maximum web length that can be supplied by the feeding rolls. when folded between the conveyor of the hot-air chamber 11 and the grate 8, the web forms lamellas by folding. Convex flank of the tooth shifts them, respectively. it presses against the previous one and forms a fibrous layer. The height of the lamella can be controlled by the ratio of the web feed rate 16 and the peripheral speed of the pressing pins 7. To regulate the greater or lesser slant angle of the slats, a shaping roller 12 (Fig. 2) is placed underneath the individual pins 13 pass through a recess in the guide surface 4. in the extension of the feeding pan 3 and penetrate into the space between the working disks 6.

EXAMPLES

In FIG. 1 shows a web layering device 17 of a vertically stacked web 16, which forms a feed roller 1 composed of feed rolls 2, a feed pan 3. »followed by a guide surface 4 which, together with the ridge 8 and the heat conveyor 11, the chambers form a slot, into which webs 16 from the web 16 are inserted by the pressing mandrels 7 of the working rolls 5 of the working roll 5. The radius of the involute base circle describing the outer working edge of the mandrel 7 is smaller than the radius of the involute base circle describing a portion of the inner edge of the mandrel 7. In this particular case, above the intersection area of the feed rolls 2 and mandrels 7 of working rolls 6 of the working roller 5 the application of the powdered binder, which is partly stuck in the formed fleece, partly falls on the fabric 15 carried by the conveyor 11 of the hot-air chamber. This results in a textile formation composed of a web and a textile 15 glued to the lower edge.

In FIG. 2 shows a web layering device from a vertically laid web 1.6, which forms a feed roller 1 composed of feed rolls 2, a feeding pan 3, which is followed by a guide surface 4, which, together with the comb 8 and the heat chamber conveyor 11 In this particular embodiment, the guide surface 4 is provided with grooves through which the mandrels 13 of the forming roller 12 penetrate into the space between the ridge 8 and the guide surface 4. the final position of the slats 17 in the formed formation.

In FIG. 3 shows a web layering device of a vertically laid web 16, which forms a feed roller 2 composed of feed rolls 2, a feeding pan 2, which is followed by a guide surface 4 after the compression point A, which together with the ridge 8 and the conveyor 11 form a slot. into which webs 16 are inserted by the pressing wires 9 of the working cylinder 5. In this particular case, the pressing wires are resilient, allowing the elastic deformation of the wires 9 upon impact on the bar 10 which guides the wires 9 The fineness of the slats in the web is influenced by a suitably selected position of the slat and the accuracy of forming the slats before they are pressed together. Furthermore, this embodiment according to FIG. 3 prevents the individual fibers from being pulled out of the web above the ridge 8.

Industrial Applicability

The rotary vertical stacker is a device that allows the production of high-volume bonded fabrics. When used in an assembly with the most powerful carding composition and hot-air chamber, it creates a production line whose technical and economic parameters significantly exceed the previously known technique. The investment costs for the built-up area, machine investments are considerably reduced, and the energy consumption and the need for workers to operate the line are considerably reduced.

The products are used mainly in the clothing industry as thermal insulation liners, in the upholstery industry as flexible fillings, in the automotive and construction industry as thermal and noise insulation and others. The functions of the devices and the application of the products are operationally verifiable.

Claims (7)

PATENT CLAIMS (1) A device for layering a web of vertically laid web by a working cylinder with press mandrels, characterized in that the device consists of a feed device consisting of a roller (1) composed of feed discs (2) placed on the shaft spaced at least 3 mm and maximum 100 mm if, at the lower edge of the adjoining feed pan (3) adjoining the compression point (A) on the guide wall (4), a work roller (5) composed of working disks (6) with thrusting pins (7) or wires (9); a ridge (8) extending between the working discs (6). 2) The device according to claim 1, characterized in that the outer shapes of the pressing mandrels (7) are formed according to a curve whose tangent at the point of intersection of the tangent to the plane of the ridge (8) has an angle greater than 90 ° thereto. the edge of the mandrel (7) is formed according to a curve which defines the length of the link between the vertices of two adjacent mandrels in the plane of the disc to at least twice the height of the resulting lamella (17). 3) The device according to claim 1, characterized in that the distances between the individual rolls (2) of the feed roller (1) and the pressing mandrels (7) or the wires (9) of the working roller (5) allow a controlled mutual penetration. 4. The device according to claim 1, characterized in that the distance of the individual pressing mandrels (7) along the circumference is at least 80% of the length of the surface of the gap between their pressing and facing sides. 5) The device according to items 1 and 2, characterized in that the working roller (5) formed by a system of rows of wires (9) resilient or rigid and pivotable against the sense of rotation of the roller (5) is complemented by a bar (10) an outlet part of the comb (8) forming together with the conveyor (11) defining a space for the layers to be formed. 6) Device according to claim 1, characterized in that a shaping roller (12) is placed on the underside of the working roller (5), the mandrels (13) of which extend through the selected guide surfaces (4) in the extension of the guide pan (3). 7) A method for producing bulky fabric according to claim 1, characterized in that the web or other fibrous layer formed into approximately perpendicular folds and forming the web is laid on the fabric (15) supported on the hot-chamber conveyor (11), alternatively provided with a powdered thermo-plating binder deposited from the dispensing device (14).