JPH08199434A - Equipment for forming large fleece fiber bands - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exactly guide the fleece even in the case of a high fleece speed in an apparatus for forming a large-sized fleece bearing delivery rollers into fiber bands. SOLUTION: At least three nozzles 62, 63, 74 are equipped, the first nozzle 62 is arranged between the conveying belt 3 and the plate 5 at an α angle of 100-140 deg. to the moving direction A of the conveying belt toward the fleece edge 10, the second nozzle 63 is arranged in the end edge range of the plate 5 between the plate 5 and the delivery roller 7 toward the fleece edge 10 mainly in the moving direction A of the conveying belt 3 and the third nozzle is arranged near the clamping gap for the delivery roller 7 at a γ angle of 90-130 deg. to the moving direction A of the conveying belt toward the fleece edge 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor belt which is guided through a detaching roller and in which an upper belt line forms a substantially horizontal guide gap with respect to a fleece (fiber layer) together with a horizontal fixing plate. Larger size, especially in flat carders, having nozzle devices located on opposite sides of the guide gap for injecting an air jet that guides and compresses the edge fibers of the fleece and delivery rollers at the end of the upper belt line. An apparatus for forming a (large area) fleece into a fiber band.

[0002]

2. Description of the Prior Art A device of this kind is known in particular from DE-A-3326677. In this device, the edge of the large fleece is compressed and pressed against the rest of the fleece by the air stream which is strongly scattered in the transport plane of the fleece just after the detaching roller set.

Due to the intense scattering of the jet of air, the air strikes the fleece edge at various angles. The action of this air jet cannot be tightly controlled in the area of the fleece edge. If the speed of the fleece is high, its edge will tear. The quality of the fiber band is degraded by the irregularities that occur. The fleece is often torn at higher working speeds.

DE-A-3804147 proposes a modification of the above-mentioned device in which the nozzle device is formed by two ramps on either side of the fleece.

The lamps are arranged parallel to the direction of movement of the conveyor belt and have a plurality of holes along their axis, which are directed towards the fleece edge. This device has the task of rolling up the fleece edge, also called the edge, over a long distance. This seeks to obtain a uniform and homogeneous fiber band.

This device also has the disadvantage that the air jet flow through the holes in the thin sheet metal of the lamp cannot be practically adjusted and will flow out of perfect control. That is, in total,
Pressure is generated toward the fleece edge that presses the fibers against the fleece, but the tearing phenomenon is suppressed only at conventional speeds.

However, an uncontrollable, partially turbulent air flow is intensified in proportion to the further increase in the speed of the fleece and automatically causes the abovementioned drawbacks.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the drawbacks of the prior art and to enable large fleeces to be formed into uniform and homogeneous fiber bands without hindrance even at high fleece speeds. Is to make the molding equipment.

[0009]

According to the invention, this object is surprisingly achieved by the measures defined in claim 1.

In the present invention, the first nozzle has the function of turning and compressing the fleece edge strongly inward at an early point. This action is assisted by the fibers being rubbed against the plate located on the fleece. This causes another force in the sense of compressing the fleece edge.

The air flow in the second nozzle is such that it reduces the relative velocity of the fibers of the fleece and the air present therein to a value such that no actual displacement of the edge fibers occurs. Keep the parts compressed.

The third nozzle forms an air stream which merges with the air stream of the second nozzle and redirects the air stream of the second nozzle once again towards the center of the fleece and thus in the tightening gap of the subsequent delivery roller. Compress the fleece just before.

By combining these nozzles, the width of the fleece is already reduced considerably in the area of the conveyor belt, the edge fibers are kept tied to the fleece in a regular manner and exposed to uncontrollable air movements. It will not be done.

In particular, the third nozzle ensures that the already obtained compression is determined by the pressure in the clamping gap of the delivery roller. The pre-compressed fleece can thereby be guided unimpeded to the next hopper for the final formation of the fiber band.

The formation of the first and second nozzles according to claim 2 ensures a simple and inexpensive construction of the nozzle device.

The adjustability according to claim 3 ensures that both nozzles can be adjusted and fixed to a near optimum value.

According to an embodiment according to claim 4, the first
And the second nozzles can be adjusted independently of each other.

The shape of the third nozzle according to claim 5 and the arrangement of this nozzle inside the delivery roller are as follows.
Immediately thereafter, it has the advantage that an air flow can be generated at the location where the actual state of the fleece is established by the clamping action of the delivery roller. It is avoided to place protruding elements such as fibers and / or dust in this very sensitive area.

The formation of the third nozzle according to claim 6 comprises:
It ensures a cheap manufacture of the nozzle device and at the same time the adjustability of the nozzle in the circumferential direction of the delivery roller.

The arrangement of the delivery rollers according to claim 7 reduces, on the one hand, the manufacturing costs for the conventional delivery roller set and its drive elements. On the other hand, the collar of the delivery roller is used for frictionally coupling with the conveyor belt and at the same time serves as an auxiliary air guiding element directly adjacent to the perforated area.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail with reference to the embodiments shown in the drawings.

The example relates to a worsted machine. Carding tool 1
Immediately adjacent thereto are generally arranged detaching rollers 2, 2 '. Lower detaching roller 2
The endless conveyor belt 3 is guided to the upper side of. The belt line of the conveyor belt 3 extends substantially horizontally.

The opposite side of the endless conveyor belt 3 is a guide roller 3
It is guided and stretched through 1.

The upper belt line of the conveyor belt 3 guides the fleece (fiber layer) 10 between the detaching roller 2 and the delivery roller 7 and finally forms the fiber band into a hopper 8. Direct to.

The fleece 10 is a detaching roller 2,
Immediately behind 2 ', it is pressed against the conveyor belt 3 by a blind roller 4 having a smooth surface, whereby the fleece 1
0 itself is strong.

Following the blind roller 4, a fixed plate 5 is provided at a predetermined distance from the upper belt line of the conveyor belt 3.
Is extending. A nozzle head 6 is arranged outside the fleece guide range at the end of the plate 5 opposite the blind roller 4.

The nozzle head 6 has a threaded shaft pin 64 for fixing it to the plate 5, a nut 66 and a nipple 65 for a hose 91 connected to a compressed air source. The central holes 61 in these axle pins are used, for example, to guide air to the extent of the nozzle ring 60, which is integrally formed with the threaded axle pin 64 in FIG.

The nozzle ring 60 exists below the plate 5. The nozzles 62, 63 have a substantially radial hole, the inner side of which opens into the central hole 61 of the shaft pin and the outer side of which opens as an outflow opening between the belt line of the conveyor belt 3 and the plate 5. There is.

The nozzle ring 60 has a first hole for the first nozzle 62 and a second hole for the second nozzle 63. Both nozzles 62, 63 make an angle of about 90 ° with each other.

The nozzle ring 60 can be set at an angle α of 100 to 140 ° with respect to the moving direction A of the conveyor belt 3 in the circumferential direction and the first nozzle 62 with respect to the moving direction A of the conveyor belt 3. It can be adjusted so that the second nozzle 63 can be set at an angle β of 10 to 50 °.

When the first nozzle 62 is set at an angle of α = about 130 ° with respect to the moving direction A of the conveyor belt 3, a value almost optimum for guiding the edge fibers of the fleece 10 is obtained. To be

First nozzle 62 and second nozzle 63
Are arranged on the respective nozzle rings 60, 60 '(see FIG.
It is also possible that both nozzle rings 60, 60 'can be adjusted independently of each other. In this case, it is advantageous that the first nozzle 62 is directly adjacent to the upper belt line of the conveyor belt 3.

The delivery roller 7 is located above the guide roller 31 of the conveyor belt 3. This delivery roller 7
Makes frictional contact with the conveyor belt 3 at its collar 71 and is thus rotated.

Immediately adjacent to the collar 71 of the delivery roller 7, there is located a range 73 of the delivery roller cylinder 72 in which a relatively large hole 731 is formed.

At least one side of the hole 731 is largely inclined toward the center of the fleece 10 so that the air can flow out almost continuously from the inside of the delivery roller 7. Fixed bearing journal 7 for delivery roller 7
4 extends exactly into the hollow chamber of the delivery roller 7.

The bearing journal 74 has the inclined nozzle hole 7
42 has a central hole 741 that opens. The hole 742 called the third nozzle is provided in the cylinder 72 of the delivery roller 7.
Has an outflow opening in the perforated area 73.

The bearing journal 74 has a nipple 743 on the outside for a hose 92 leading to a source of compressed air. The bearing journal 74 is rotationally adjustable about its longitudinal axis and is fixedly held in a bearing 75 of the machine. The bearing journal 74 generally has its nozzle bore 742.
Is adjusted so as to be directed to the upper surface of the conveyor belt 3 immediately before the tightening gap of the delivery roller 7.

This third nozzle 742 is tiltably adjustable with respect to the moving direction A of the conveyor belt 3 by an angle γ of about 100 to 140 °.

Next, the operation of this nozzle device will be described in detail. The air flow of the first nozzle 62 first impinges on the edge fibers of the fleece 10 at a point spaced from the fastening point of the blind roller 4 by the average fiber length of the fleece 10. This air flow, which is bounded on the lower side by the upper belt line of the conveyor belt 3 and on the upper side by the plate 5, compresses the fleece 10 tightly in its edge region.

This compression of the fleece 10 is maintained over a range by the natural scattering of the air jet stream and is diverted in the direction of conveyance of the fleece edge by the wake produced by the second air jet stream from the nozzle 63. It

The second jet of air is first adjusted such that it reaches the fleece edge, for example in the area between the plate 5 and the delivery roller 7. Since the wake produced by this air jet additionally guides other air streams into this region by injector action, the relative velocity of the fibers at the edge of the fleece and the air surrounding it is greater in the fleece 10. Becomes so small that no position change occurs.

The air flow generated by the third nozzle 742 in the bearing journal 74 of the delivery roller 7 is directed essentially at right angles to the fleece edge,
It serves to further compress the fleece 10 immediately before the tightening gap of the delivery roller 7 and, optionally, before a separate set of delivery rollers.

The air flow from the second nozzle 63 and the third
The air flow of the nozzle 742 forms a synthetic air flow that has a great strength up to the tightening gap and sufficiently stiffens the fleece edge.

The fleece edge thus hardened and thickened with respect to the other parts of the fleece 10 is caused by the pressure between the delivery roller 7 and the conveyor belt 3.
The 0'is compressed so that it can be guided without obstacle even at high speeds on the way to the hopper 8 which finally concentrates on the shape of the fiber band.

Experimental results have shown that the fibers in the edge region are first strongly shunted towards the center of the fleece 10 by the air flow of the first nozzle 62, in which case they are rubbed along the face of the plate 5. Was done. In relative movement, this friction additionally compresses the fleece 10 in this range.

By thus defining and guiding air in the edge region of the fleece 10, a quality band of high quality fibers comes out of the machine even at very high fleece speeds, and the next doubling and drafting process takes place. Can be limited to a minimum.

High-quality yarn is spun from the fiber band.

[Brief description of drawings]

1 is a schematic side view of an apparatus according to the present invention.

FIG. 2 is an enlarged partial plan view of a part of a nozzle device of an apparatus according to the present invention.

FIG. 3 is an enlarged cross-sectional view of the nozzle head for the first and second nozzles of the device according to the invention.

FIG. 4 is a reduced view of a nozzle head having nozzle rings that can be adjusted independently of each other.

FIG. 5 is a sectional view of a bearing of a delivery roller having a third nozzle.

[Explanation of symbols]

 1 Carding tool 10, 10 'Fleece (fiber layer) 2, 2' Detaching roller 3 Conveyor belt 31 Guide roller 4 Blind roller 5 Plate 6 Nozzle head 60, 60 'Nozzle ring 61 Central hole 62 First nozzle 63 Second nozzle 64 Threaded shaft pin 65 Nipple 66 Nut 7 Delivery roller 71 Color 72 Cylinder 73 Perforated area 731 Hole (opening) 74 Bearing journal 741 Central hole 742 Third nozzle 743 Nipple 75 Bearing 8 Hopper 91 hose 92 hose A movement direction α angle of first nozzle β angle of second nozzle γ angle of third nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Reiner, Decker Hemnitz, Federal Republic of Germany, Gaiber Schutrase, 211

Claims (7)

[Claims] 1. A conveyor belt which is guided via a detaching roller and whose upper belt line forms a substantially horizontal guide gap with respect to the fleece together with a horizontal fixing plate.
A large fleece, especially in a flat carding machine, having a nozzle device arranged on both sides of the guide gap for injecting an air jet for guiding and compressing the edge fibers of the fleece and a delivery roller at the end of the upper belt line In the device for shaping into: the nozzle device comprises at least three nozzles (62, 63, 742) per fleece edge, the first nozzle (62) of which comprises a conveyor belt (3) and a plate (5). Conveyor belt (3) towards the fleece edge (10) between
Is arranged at an angle (α) of 100 to 140 ° with respect to the movement direction (A) of the second nozzle (63) in the terminal range of the plate (5) and the delivery roller (7). Between them and toward the fleece edge (10) mainly in the direction of movement (A) of the conveyor belt (3), the third nozzle (742) being the end of the conveyor line of the conveyor belt (3). Within the range, it is arranged near the tightening gap of the delivery roller (7) at an angle (γ) of 90 to 130 ° toward the fleece edge (10) with respect to the movement direction (A) of the conveyor belt (3). A device for forming large fleece into a fiber band. 2. The first and second nozzles (62, 63) are arranged together in one nozzle ring (60) at an angle of about 90 ° with respect to one another, and a central air inlet channel (61, 91) is provided.
The device of claim 1, wherein the device is connected to. 3. A nozzle ring (60) can be adjustably fixed to a nozzle head (6), the nozzle head (6) being mounted on a plate (5). apparatus. 4. A first and a second nozzle (62, 63) are arranged in each nozzle ring (60, 60 '),
Both of these nozzle rings (60, 60 ') are supported independently of each other by a nozzle head (6) having a central air introduction passage (61), and are mounted so as to be rotationally adjustable about a vertical axis. The device according to claim 1. 5. A third nozzle (742) is arranged inside the cylinder (72) of the delivery roller (7), which cylinder (7)
Device according to any one of claims 1 to 4, characterized in that 2) is perforated in a ring-shaped area (73) in the working area of the third nozzle (742). 6. An air introduction passage for a third nozzle (742) is guided through a bearing journal (74) of a delivery roller (7), and its fixed bearing journal (74) is a central hole (741) for air introduction. ), A nipple (743) for the hose (92) and a third nozzle inclined with respect to its axis.
The device according to any one of 1. 7. A delivery roller (7) has a perforated area (7).
3) has a collar (71) adjacent to the outside thereof, with which the delivery roller (7) is conveyed by the conveyor belt (3).
7. The device according to claim 1, wherein the device is frictionally connected to the.