JP2021511453A - Combing machine - Google Patents

Abstract

The comber (1) comprises a nipper (4) at a predetermined working speed (Vp) and a separation cylinder of a first pair (20) and has a continuous rotational motion at an angular rotational speed (WC). The management means (100) is provided to adjust the rotation speed (Wc) as a function of the work speed (Vp) of the nipper (4), and the rotation speed (Wc) is a function of the work speed (Vp). As, it increases further than proportional.

Description

An object of the present invention is a combing tool for a spinning preparation line.

In the spinning preparation line, after the initial stages of fiber opening and washing, a carding process by a carding machine is envisioned, after which the fibers are provided in the form of slivers.

After possible processing on the wrap winder, when several separate slivers are joined to obtain a wrap, the fibers are highly parallel aligned to obtain a clean web (woven fabric). The sliver or wrap is combed (combed) by a comber.

On modern machines, the basic combing operations performed at speeds of 450-500 strokes per minute are
-Intermittent supply of wrap;
-With closed nippers, comb the incoming fringe head with a circular comb;
-The fringe heads are overlapped and joined to the web already combed in the previous cycle and properly retracted by its reverse rotating separation rollers;
-With open nippers, comb the fringe tail with straight nipper combs;
-Advance the fringe combed by the separating roller during its forward rotation.

Therefore, the separation rollers have alternating rotational movements. Starting with an electric motor, the moving members of the separating rollers that control the separating rollers and allow their alternating movements are one of the most problematic parts of the comber design and construction.

Such members must withstand substantially intense dynamic stress due to repeated stops and restarts. As the speed of the machine increases, the rotational speed of the separating rollers increases proportionally in one direction and the other. Therefore, the dynamic stress becomes more and more severe.

These components account for at least 30% to 40% of the final cost of the comber and are very large.

There are patent documents describing solutions for combers with continuous rotational motion of the separating rollers, see, for example, the document EP-A1-1553219.

Nevertheless, the applicant confirms that the combing results are not satisfactory in terms of the web quality obtained by experimentally reproducing the solution shown in document EP-A1-1553219. I was able to.

Ultimately, there is a comber solution in which the separation rollers are controlled by an electronically controlled electric motor to obtain alternating rotational motion. In this case, the complicated mechanical moving member of the separation roller is not required.

However, such solutions have major drawbacks primarily with respect to energy consumption, heating of electric motors, life of such motors, and response of motion control.

An object of the present invention is to create a comber with separate rollers, to perform continuous rotational movements during normal combing operations, and to ensure that the combed web quality is at a satisfactory level. is there.

Such an object is achieved by the comber according to claim 1. The dependent claims describe a more advantageous embodiment of the invention.

The features and advantages of combers according to the present invention will be provided through non-limiting examples according to the accompanying figures and will become apparent from the specification shown below.
Diagram of combers according to the present invention in successive processing steps Diagram of combers according to the present invention in successive processing steps Diagram of combers according to the present invention in successive processing steps Diagram of combers according to the present invention in successive processing steps Diagram of combers according to the present invention in successive processing steps Diagram of combers according to the present invention in successive processing steps Diagram of combers according to the present invention in successive processing steps Diagram of combers according to the present invention in successive processing steps Diagram of combers according to the present invention in successive processing steps Diagram of combers according to the present invention in successive processing steps A graph illustrating the operation of a comb according to the present invention

The comber according to the present invention includes a fixed frame and nippers 4 supported by the fixed frame.

The nippers 4 include a lower jaw 6, an upper jaw 8, and a straight comb 10 that is usually attached to the lower jaw 6.

Further, the nipper 4 is rotatable intermittently by a command and includes a feed roller 12 supported by a lower jaw 6.

The comber further comprises a first pair of separation rollers 20 including an upper separation roller 20a and a lower separation roller 20b downstream of the nippers 4 and is generally pressure coupled to the upper separation roller 20a thereby during rotation. pull.

Between the separation rollers 20a and 20b, on the side of the nippers 4, there is an inlet port 22 on which the nippers 4 carry a section of the sliver released by the feed rollers 12. On the other hand, there is an exit port 24.

The comber further includes a second pair 30 of separation rollers downstream of the first pair 20, said second pair 30 comprising an upper separation roller 30a and a lower separation roller 30b, generally the upper separation roller 20a. Pressure-coupled with, thereby pulling into rotation.

Between the separation rollers 30a and 30b, an inlet port 32 exists on the side of the nipper 4, and an outlet port 34 exists on the opposite side.

Further, preferably, the comber includes a fixed table 36 arranged between the first separation rollers 20a and 20b and the second separation rollers 30a and 30b. Preferably, the table 36 has a bearing surface 38, is generally flat, and is arranged between the ports of the first separation rollers 20a, 20b and the ports of the second separation rollers 30a, 30b.

The combs further include a circular comb 40 that is generally located beneath the nippers 4 and has a constant or variable speed, always continuous rotational movement in the same direction.

The comber comprises one or more electric motors and a plurality of transmission members suitable for transmitting motion from at least one electric motor to the above-mentioned components.

In particular, the nippers have forward and backward movements, and the jaws have opening and closing movements at a predetermined working speed Vp.

In particular, in the nippers 4, the jaws 6 and 8 move forward and backward between the advance limit position proximal to the separation rollers 20a and 20b and the jaws 20a and 20b between the advance limit positions distal to the separation rollers 20a and 20b. It has the operations of.

At the same time, the jaws 6 and 8 have alternating opening and closing movements, while the feed rollers 12 have intermittent rotational movements that allow the release of a portion of the sliver from the nippers.

The separation rollers 20a, 20b of the first pair 20 have a continuous rotational motion (constant or variable velocity, but without reversal), each having an angular rotational speed Wc in one rotational direction. The fiber fringes are then separated from the sliver portion at the inlet port 22.

Similarly, the separation rollers 30a, 30b of the second pair 30 have a continuous rotational motion synchronized with that of the cylinders 20a, 20b of the first pair 20.

The comber further comprises a support 50 downstream of the second pair 30 of the separation rollers 30a, 30b, which receives the fringes of the sliver continuously supplied from the separation rollers 30a, 30b of the second pair 30.

Preferably, the support 50 is operably connected to a suction device to obtain a suction air flow through the surface that is permeable to air and suitable for holding the fringe.

In addition, the support portion 50 is movable, and by advancing, it is possible to partially overlap the fringes existing continuously on the support portion 50.

For example, the support portion 50 is a breathable belt arranged along a closed circuit.

Along the closed support, the belt 50 runs on a rigid base 52 connected to a suction duct 54 of the suction device.

Further, preferably, along the cycle, the belt 50 cooperates with the belt rollers 56, 58, and the pull roller pair 60, which define the cycle.

For example, the pair 60 of tension rollers includes an upper tension roller 60a, preferably outside the closed circuit, and a lower tension roller 60b, preferably inside the closed circuit.

The belt 50 is compressed between the tension rollers 60a, 60b in order to obtain a forward motion, at least one of which is electric and the other is inactive (idle).

Preferably, the comber further comprises a pair 70 of compression rollers suitable for compressing the web formed by the overlap of fringes on the belt 50.

In particular, the pair 70 of compression rollers includes a pressure-coupled upper compression roller 70a and a lower compression roller 70b.

Preferably, the compression rollers 70a and 70b also function as tension rollers 60a and 60b.

Further, preferably, the comber includes a pair 80 of output rollers located downstream of the compression rollers 70a, 70b. For example, the pair 80 of output rollers includes an upper output roller 80a and a lower output roller 80b and is pressure-coupled, at least one of which is electric and the other of which is inactive (idle).

Initially, it is recognized that the nippers 4 are in the forward limit position and the jaws 6 and 8 are open to make the comber movement easier to understand (FIG. 1). The feed roller 12 is stopped, and the first fringe U1 is separated by the separation rollers 20a and 20b having a continuous rotational motion in the direction of withdrawal from the nippers. While the first fringe U1 is advancing, the exiting tail is combed by a straight comb 10.

Subsequently, the nippers 4 begin to recede, the straight comb 10 finishes combing the first fringe U1, and the continuous rotation of the separation rollers 20a, 20b causes it to move toward the belt 50 or the second separation roller 30a. , 30b (FIG. 2). The feed roller 12 rotates to bring a new portion of the sliver from the lower jaw 6.

Subsequently, the nippers 4 continue to recede, thereby removing more sliver from the lower jaw 6 as well as the rotation of the feed roller 12. The continuous rotation of the separation rollers 20a and 20b advances the first fringe U1 (FIG. 3).

Subsequently, the nipper 4 reaches the closed limit retracted position because the lower jaw 6 and the upper jaw 8 engage with each other (FIG. 4). The circular comb 40 that performs a continuous rotation operation is in an angular position at which the head of the second fringe U2 starts to be combed. The feed roller 12 stops again, and the first fringe U1 continues to move forward due to the continuous rotation of the separation rollers 20a and 20b.

Subsequently, while the nippers 4 are stationary, the circular comb 40 continues to comb the head of the second fringe U2 (FIGS. 5, 6, 7). The first fringe U1 continues to move forward due to the continuous rotation of the separation rollers 20a and 20b.

Subsequently, the nipper 4 resumes its forward movement, and the circular comb 40 finishes combing the head of the second fringe U2 provided to the separation rollers 20a and 20b (FIG. 8). On the other hand, the first fringe U1 is passed to the second separation rollers 30a and 30b, and the fringe U0 in front of the first fringe U1 is carried away from the second separation rollers 30a and 30b onto the belt 50. Then pause.

Subsequently, the nippers 4 continue to advance toward the limit advance position, and the second fringe U2 engages the first separation rollers 20a and 20b. On the other hand, the first fringe U1 advances by the action of the second separation rollers 30a and 30b.

Finally, when the nippers 4 reach the forward limit position (FIG. 10), new fringes are separated from the sliver by the first separation rollers 20a, 20b at the inlet port 22.

By the continuation of the above steps, the first fringe U1 leaves the second separation rollers 30a and 30b, and the front fringe U0 advances by the movement of the belt 50 so that the head overlaps with the tail of the front fringe U0. It is carried on the belt 50.

A continuous web is thus formed on the belt 50, where the head of the following fringe overlaps the tail of the previous fringe.

The web thus formed passes between the compression rollers 70a and 70b in order to adjust the thickness.

According to the present invention, the comber includes a management means 100 suitable for adjusting the rotation speed Wc of at least one of the separation rollers 20a and 20b as a function of the working speed Vp of the nipper 4. The management means 100 is configured or programmed so that the rotational speed Wc as a function of the working speed Vp of the nippers 4 follows a predetermined law.

In other words, the management means 100 has the rotational speeds of the separating rollers 20a, 20b (generally, as a function of the working speed of the machine, that is, as a function of the number of strokes or cycles of the nippers in hours (approximately strokes / minute). rpm), suitable for adjusting.

The control means 100 is configured or programmed to follow a predetermined law that the rotational speeds of the separation rollers 20a, 20b are not linearly proportional as a function of the working speed of the machine.

In the graph of FIG. 11, the horizontal axis represents the working speed Vp of the nippers expressed as stroke / minute, and the vertical axis represents the ratio R between the rotational speed Wc (rpm) of the separation roller and the working speed Vp of the nippers. Is shown.

The dashed line T indicates the tendency of such a ratio R of a conventional machine. This tendency T is parallel to the axis of the horizontal axis, and the rotation speed of the separation roller increases proportionally and linearly as the working speed of the conventional comber increases. As a result, the ratio is constant (equal to 3 in the example graph of FIG. 11).

The continuous line C indicates the tendency of the comber ratio according to the present invention according to one embodiment. The tendency of the ratio is increasing, for example, until the working speed Vp of the machine reaches a value between 2 and 2.5, for example, until the working speed Vp of the machine reaches a value equal to 2.25. Accompanying this, it can be approximated by a partially linear function.

For example, according to the graph of FIG. 11, at the initial working speed of Vp0, that is, at 100 strokes / minute, the rotation speed Wc0 of the separation roller is, for example, equal to about 50 rpm. If the intermediate working speed of Vp1 (Vp1> Vp0) is equal to, for example, 500 strokes / minute, Wc1 is, for example, equal to about 750 rpm. The tendency of the ratio R = Wc / Vp between Vp0 and Vp1 is approximated by an increasing linear function with a first predetermined slope S1.

At the critical working speed Vpf (Vpf> Vp1> Vp0), for example, 700 strokes / minute, Wcf is, for example, about 1680 rpm. The tendency of the ratio R = Wc / Vp between Vp1 and Vpf is approximated by an increasing linear function having a second predetermined slope S2 (S2> S1) greater than the first slope S1.

Therefore, the tendency of the rotational speed Wc of the separation roller has a non-proportional increasing tendency (eg, R = Wc / Vp, or partially linear or non-linear) with respect to the working speed Vp.

In other words, according to the present invention, according to a predetermined law, as the working speed Vp of the machine increases, the rotation speed Wc of the separation roller increases more than proportionally.

Applicants have found that by increasing the rotational speed of the separating rollers proportionally higher, especially by increasing them linearly, the quality of the resulting web is significantly improved as the working speed of the machine is added. Found above.

At the same time, when the applicant maintains a proportional relationship between the working speed of the machine and the rotational speed of the separating rollers, the quality of the web is inadequate, and sometimes as in the case of conventional combers. We found that the fringes tend to wrap around the same separation roller.

The control means 100 imposes a desired rotational speed Wc on the separation rollers 20a and 20b to move the comber at full speed during operation of the comber and, for example, starting from the state of a stationary machine. It operates during the transition phase required to raise it to Vp.

During the transition stage, the management means 100 imposes a rotational speed Wc, which is a function of the working speed Vp as the working speed Vp of the comber increases, on the separation rollers 20a and 20b. Operate.

Innovatively, combers according to the present invention overcome the shortcomings mentioned with reference to the prior art.

In particular, the advantage is that the comber is very compact according to the present invention, as it does not require complicated members for the alternating motion of the separation rollers according to the prior art.

Further, it is advantageous that there is no member that is subject to large dynamic stresses, such as the control member of the separation roller of the prior art.

It will be apparent that one of ordinary skill in the art may make further changes to the above combs to meet contingent needs, all of which are within the scope of protection defined by the following claims. ..

Claims (13)

The comber (1) for the spinning preparation line, suitable for processing fiber slivers to obtain the web, is:
A nipper (4) containing a lower jaw (6), an upper jaw (8), and a feed roller (12) supported by a lower jaw (6).
With the first pair (20) of separation rollers located downstream of the nippers (4),
The nipper (4) is provided with a management means (100) for adjusting the rotation speed (Wc) of at least one separation roller (20a, 20b) as a function of the working speed (Vp).
1) The nippers have forward and backward movements, and the jaws have opening and closing movements at a predetermined working speed (Vp).
2) The feed roller (12) has an intermittent rotational motion capable of releasing a part of the sliver from the nippers.
The first pair comprises an upper separation roller (20a) and a lower separation roller (20b) so that an inlet port is defined on the nipper side between them so that the nipper (4) carries a part of the sliver. Is composed of
1) The separation rollers (20a, 20b) have a continuous rotation operation at an angular rotation speed (Wc) in the rotation direction for separating the fiber fringe (U1) from the sliver portion of the inlet port (22).
The control means (100) is configured or programmed to increase the rotational speed (Wc) more than proportionally as a function of the working speed (Vp) of the nippers (4) for a spinning preparation line. Comb. The comber according to claim 1, wherein the control means (100) is configured or programmed so that the ratio R = Wc / Vp as a function of the working speed (Vp) of the nippers (4) tends to increase. A movable support (50) located downstream of the first pair (20) of the separation rollers (20a, 20b) and receiving sliver fringes continuously supplied from the separation rollers (20a, 20b). The comber according to claim 1 or 2 provided. The comb according to claim 3, wherein the support (50) is air permeable, operably connected to a suction device to obtain a suction air flow through the top surface, and configured to hold the fringe. The comb according to claim 3 or 4, wherein the support portion (50) is configured to move so as to allow partial overlap of fringes existing continuously on the support portion (50) by advancing. The comb according to any one of claims 3 to 5, wherein the support portion (50) is a belt arranged along a closed circuit. It is pressure-coupled and comprises a pair (60) containing a first tension roller (60a) outside the cycle and a second tension roller (60b) inside the cycle, between which the belt moves forward. The comb according to claim 6 that is pulled. A second separation roller located downstream of the first pair (20), including an upper separation roller (30a) and a lower separation roller (30b), that receives the fringes of the sliver formed by the first pair (20). A comb according to any one of claims 1 to 7, comprising a pair (30) of. The comb according to claim 8, wherein the support portion (50) is downstream of a second pair (30) of separation rollers (30a, 30b) and is dependent on claim 3. A fixed table (36) arranged between the separation rollers (20a, 20b) of the first pair (20) and the separation rollers (30a, 30b) of the second pair (30) is provided, and the fixed table (36) is provided. ) Has a bearing surface (38) disposed between the outlet port (24) of the first separation roller (20a, 20b) and the inlet port (32) of the second separation roller (30a, 30b). The comber according to claim 8 or 9. A pair of compression rollers (70) that are located downstream of the support (50) and compress the web formed by stacking fringes on the support (50) to obtain a certain thickness. A comb according to any one of claims 4 to 10 when it is subordinate to claim 3. A comb according to any one of claims 1 to 11, comprising a circular comb (40) and a straight comb (10). To provide the comb according to any one of the above claims.
Increasing the working speed (Vp) of the nippers to reach the final operating speed (Vpf),
As a function of the working speed (Vp) of the nippers, increasing the rotational speed (Wc) of at least one of the separation rollers (20a, 20b) of the first pair (20) more than proportionally.
How to work with combers.

Images