JPH0610217A - Combing machine - Google Patents

Abstract

PURPOSE: To surely wind the edge section of a return-fed fleece around the detaching cylinder downward without any inconvenient influence on the tuft transferred from the nipping unit to the detaching cylinder. CONSTITUTION: An air-sucking pass 18 is additively disposed in front of the comber noil sucking chamber 12, the additive air-sucking pass 18 has the upper flow-in opening 18.1 and the flow inlet is disposed near the detaching cylinder 10 so that the air sucked into the flow-in opening may generate the air flow in the tangential direction to the detaching cylinder. This air flow winds the edge section V.1 of individual fleeces that are return-fed by the detaching cylinder 10 along the peripheral face of the detaching cylinder 10 at least over a range of 180 deg. angle, when the angle is measured from the clamped position between the detaching cylinder 10 and the detaching press roller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a combing machine provided with a reciprocating nipper unit.
The nipper unit has a clamping area for clamping and fixing the wrap to be combed, and a detaching cylinder is provided which feeds back the fleece end section of the fleece each time. , Then reciprocally rotatable in cooperation with a detaching pressure roller for detaching the tufts placed on the fleece end section from the nipper unit, the detaching cylinder and the clamping area of the nipper unit. A noil suction chamber is arranged below the motion trajectory, and a rotatable circular comb shaft supporting a circular comb segment and a circular comb brush are arranged in the noil suction chamber. A front wall with an upper edge extending adjacent the detaching cylinder and the circular About of the type having a rear wall having a upper edge extending adjacent to the path of movement of over arm segment.

[0002]

2. Description of the Prior Art In such known combing machines, the noil suction chamber serves firstly for the pneumatic derivation of the noil. The noil is carded out of the tufts held by the nipper unit by a circular comb segment, and more generally by a fixed comb.
Carded out of these tufts. These tufts are detached from the wrap located in the nipper unit by the detaching cylinder and the detaching pressing roller. Furthermore, the air flow drawn between the detaching cylinder and the nipper unit into the noil suction chamber has the desired effect, namely the fleece end section fed back by the detaching cylinder along the peripheral surface of the detaching cylinder, Due to its downward wrapping effect, the noil-free tufts, which have been moved from the nipper unit towards the detaching cylinder, can smoothly rest on the fleece end section, thereby Is spliced to the fleece end section of. However, such desired effects often do not occur within the required scale. Particularly disadvantageous is the air flow formed in the noil suction chamber by the rotating circular comb shaft and the rotating circular comb brush. Especially in the noil suction chamber, below the detaching cylinder, a pressure shock occurs whenever a circular comb segment enters the circular comb brush. It is also not possible to increase the desired effect described above by increasing the negative pressure in the noil suction chamber. This is because the knot-free tufts that have been moved from the nipper unit towards the detaching cylinder also move relatively strongly downwards by increasing the suction air flow between the detaching cylinder and the nipper unit. Bending, which causes the tufts not to rest smoothly on the back-fed fleece end sections, colliding with these fleece end sections,
It may be crushed.

[0003]

SUMMARY OF THE INVENTION The object of the invention is to improve a combing machine of the type mentioned at the outset, without adversely affecting the tufts moved from the nipper unit towards the detaching cylinder. The purpose of the invention is to provide a combing machine in which the back-fed fleece end section reliably wraps downwards along the detaching cylinder.

[0004]

In order to solve this problem, in the structure of the present invention, an additional suction air passage is arranged in front of the noil suction chamber, and the additional suction air passage is provided at the upper part. An inflow opening, the inflow opening being arranged near the detaching cylinder so that the air sucked into the inflow opening causes a tangential air flow in the detaching cylinder; Flow
Each fleece end section fed back by the detaching cylinder was measured from the tightening point between the detaching cylinder and the detaching pressure roller as a starting point, and the fleece end section was applied to the circumferential surface of the detaching cylinder over an angle of at least 180 °. I tried to wrap it around.

[0005]

According to the invention, the additional intake air passage is connected to a suitable negative pressure source. It is simplest if this additional suction air passage communicates with the noil suction chamber in which a negative pressure is created during operation anyway, at a location below the circular comb brush. Above this point, this additional suction air passage is isolated from the rotating noil suction chamber in which the circular comb shaft and circular comb brush move, so that in the additional suction air chamber and along the detaching cylinder. , A flow that is uniform and not actually pulsating occurs. This flow ensures that the back-fed fleece end section can be reliably wound around the peripheral surface of the detaching cylinder. Moreover, such a uniform suction air flow keeps the splice area clean of dust and impurities more effectively than is possible with pulsating flow.

The use of a dedicated suction air conduit to bend back-fed fleece end sections downward is known in wool combing machines (French Patent Publication No. 22).
64899 specification). The outlet opening of this known suction air conduit is located at the upper end of the dust suction conduit, and the suction air flow causes the fleece end section to be sucked downwards into the suction air conduit. This works only with wool having relatively long fibers.
In fibrous materials with short fibers, such as cotton, the suction air flow in the suction air conduit can cause the fibers to be drawn out of the fleece end section and thus lost (reaching into the dust suction conduit).

On the other hand, in the combing machine according to the invention, the back-fed fleece end section is additionally fed forward via the upper edge of the air flow, ie the front wall of the noil suction chamber. The air flow drawn into the suction air passage is wrapped around the circumference of the detaching cylinder at an angle of at least 180 °. This ensures that the fibers of the fleece end section are well anchored so that the air stream rubbing beside the fleece end section prevents the fibers from being pulled out of the fleece.
In addition, the fleece end section is wrapped around a large peripheral area of the detaching cylinder, so that the nep caught at the leading edge of the fleece end section has the highest speed in the area of the inlet opening of the additional suction air passage. Captured by air flow.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings.

As shown in FIG. 1, the combing machine according to the present invention has a nipper unit having a nipper frame 1. The nipper frame can be reciprocated between a front end position and a rear end position in the drawing by a nipper crank 2 pivotally attached to a rear end thereof. A front side support part 3 is pivotally attached to a front end part of the nipper frame 1, and these front side support parts are rotatable about an axis of the circular comb shaft 4. The nipper unit includes an undamper plate 5 supported by the nipper frame 1.
And the overnipper plate 6 supported by the overnipper arm 7. The undamper plate 6 and the over nipper arm 7 are pivotally connected to the nipper frame 1 about an axis 8. At the rear end position of the nipper unit, the undamper plate 5
Between the front edge of the and the lower edge of the over nipper plate 6,
The lap W to be combed is clamped and fixed, and the tufts protruding from the nipper unit have their noils removed by the circular comb segments 9 supported by the rotating circular comb shaft 4. In this way, the front edge of the undamper plate 5 and the lower edge of the over nipper plate 6 are
This forms a tightening region for tightening and fixing the wrap W to be combed.

The detaching cylinder 10 is located at a predetermined position on the frame of the combing machine, that is, a position immediately in front of the front edge of the undampening plate 5 when the nipper unit is at the front end position shown in the drawing. Is supported by. A detaching pressing roller 11 cooperates with the detaching cylinder 10. The detaching pressing roller presses the combing machine fleece V made of combed fiber material against the detaching cylinder 10. The detaching cylinder 10 and the detaching pressing roller 11 are reciprocally rotated by a back step motion. At the time of reverse rotation, the detaching cylinder and the detaching pressing roller are connected to the fleece end section V. 1
Is supplied back, so that the tuft W. from which the noil has been removed is moved from the nipper unit toward the detaching cylinder 10. 1 is fleece edge classification V. Can be placed on 1. Then, the detaching cylinder 10 and the detaching pressing roller 11 are rotated in the forward direction, and the fleece end section V. 1 is a tuft W.1 mounted on this. 1, that is, the tufts W. 1 sent forward by a predetermined supply amount in relation to the nipper unit. Along with 1, it is drawn again into the tightening line between the detaching cylinder and the detaching pressure roller. Taft W. The tip of 1 is detached from the wrap W located in the nipper unit. The tuft W. W. captured by the detaching cylinder 10. 1
Fibers are generally passed through a fixed comb (not shown).

A noil suction chamber 12 is normally arranged below the detaching cylinder 10 and the movement track of the front edge of the undampper plate 5 or the tightening region of the nipper unit. A circular comb shaft 4 supporting the circular comb segment 9 and a circular comb brush 13 extend laterally through the noil suction chamber 12. The front wall 14 of the noil suction chamber 12 is provided with a detaching cylinder 1
It has an upper edge extending adjacent to zero. The rear wall 15 of the noil suction chamber 12 has an upper edge which extends adjacent to the movement path of the circular comb segment 9. The lower end of the noil suction chamber 12 is connected to a suction passage (not shown) via a pipe piece 16. An adjustable diaphragm plate 17 extends into the tube piece 16. By shifting the throttle plate 17, the amount of the air flow sucked is adjusted.

In front of the noil suction chamber 12, an additional suction air passage 18 is arranged, which is located below the circular comb brush 13 and communicates with the noil suction chamber 12. There is. The lower end of the additional suction air passage 18 opens into the noil suction chamber 12 between the circular comb brush 13 and the tube piece 16. Therefore, the periodic turbulent air flow or pressure fluctuations caused by the rotation of the circular comb shaft 4 and the circular comb brush 13 have only a slight effect on the air flow through the additional suction air passage 18. . An adjustable throttle plate 19 extends into the additional intake air passage 18. By displacing the throttle plate 19, the gap width of the slit 20 limited by the edge of the throttle plate 19 and the wall located opposite this edge and thus of the air flow through the additional intake air passage 18 The amount is adjusted.

The additional intake air passage 18 is preferably bounded on the one hand by the front wall 14 of the noil intake hole 12 and on the other hand by an additional front wall 21, as shown. This front wall 21 also has a slit 22 through which a small amount of air can be sucked from the surroundings into the lower region of the additional suction air passage 18. In this case, the slit 22 is an adjustable plate 2
3, which allows the gap width of the slit 22 and thus the proportion of air drawn in from the surroundings to be adjusted.

The additional intake air passage 18 has an upper inlet opening 18.1 which adjoins the peripheral surface of the detaching cylinder 10 in the following manner. That is, the air flow sucked forward into the additional intake air passage 18 between the upper edge of the front wall 14 and the peripheral surface of the detaching cylinder 10 is supplied back by the detaching cylinder 10. Each fleece edge classification V. 1 is sucked so as to wind around the detaching cylinder 10 from behind, and the detaching cylinder 10
Measured starting from the tightening line between the detaching pressure roller 11 and the detaching pressure roller 11, the fleece end sections extend along the circumferential surface of the detaching cylinder 10 over an angle of more than 180 °.
To achieve this, the detaching cylinder 10
Starting from the axis of the detaching pressure roller 11 and containing the axis (as well as the clamping line) of the detaching pressure roller 11, and penetrating between the detaching cylinder 10 and the upper edge of the front wall 14 starting from the axis of the detaching cylinder 10. The plane including the narrowest part of the gap is the detaching cylinder 10
An angle of greater than 180 ° is measured around from around.

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing a component part of a combing machine.

[Explanation of symbols]

1 nipper frame, 2 nipper crank, 3 front support part, 4 circular comb shaft, 5 undamping plate, 6 over nipper plate, 7 over nipper arm, 8 shaft, 9 circular comb segment,
10 Detaching Cylinder, 11 Detaching Pressing Roller, 12 Noil Suction Chamber, 13 Circular Comb Brush, 14 Front Wall, 15 Rear Wall, 16
Tube piece, 17 throttle plate, 18 suction air passage, 18.1 inlet opening, 19 throttle plate, 2
0 slit, 21 front wall, 22 slit, 23
Plate, V combing machine fleece, V. 1
Fleece edge segment, W lap, W. 1 tuft

Claims (6)

[Claims] 1. A combing machine, comprising a nipper unit capable of reciprocating motion, the nipper unit having a tightening region for tightening and fixing a wrap (W) to be combed, A detaching cylinder (10) is provided, which feeds back the fleece end section (V.1) of the fleece (V) in each case and then the tuft mounted on the fleece end section. In order to detach (W.1) from the nipper unit, reciprocating rotation is possible in cooperation with the detaching pressing roller (11), and the detaching cylinder (10) and the movement trajectory of the clamping region of the nipper unit. And a noil suction chamber (12) is arranged below the noil suction chamber (12), in which the circular comb segment (9) is rotatable. A circular comb shaft (4) and a circular comb brush (13) are arranged, and the noil suction chamber (12) is connected to the detaching cylinder (1).
Front wall (14) with an upper edge extending adjacent to (0)
And a rear wall (15) having an upper edge extending adjacent to the movement trajectory of the circular comb segment (9), the noil suction chamber (12)
In front of it, an additional intake air passage (18) is arranged, said additional intake air passage (18) having an upper inlet opening (18.1), said inlet opening (18. 1)
The air sucked into the detaching cylinder (1
0) is provided near said detaching cylinder (10) so as to produce a tangential air flow, said airflow being supplied back by said detaching cylinder (10). Each fleece end section (V.1) is measured starting from the tightening point between the detaching cylinder (10) and the detaching pressure roller (11), and the detaching cylinder over an angle of at least 180 °. A combing machine characterized by being wound along the peripheral surface of (10). 2. Combing according to claim 1, wherein said additional suction air passage (18) communicates with said noil suction chamber (12) at a location below said circular comb brush (13). Machine. 3. The front wall (14) of the noil suction chamber (12) is provided with the additional suction air passage (18).
And limited by an additional front wall (21),
The combing machine according to claim 1 or 2. 4. In the region of the lower part of the suction air passage (18), it is connected to the surroundings via suction slits (22) with an adjustable gap width for additional air,
The combing machine according to any one of claims 1 to 3. 5. The suction air passage (18) communicates with the noil suction chamber (12) via a slit (20) of adjustable width. The combing machine according to item 1. 6. The combing according to claim 1, wherein the lower end of the noil suction chamber (12) is connected to the suction passage via a slit having an adjustable gap width. Machine.