JPH0359162B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a fiber sliver manufacturing method and a fiber sliver manufacturing apparatus used to obtain a fiber sliver from which short fibers are removed from a fiber group in a spinning process. .

In the present invention, short fibers refer to short fibers in the fiber group.
In the cotton fiber length measurement method specified in JISL1019,
It refers to fibers with a fiber length calculated as short fiber content.

Conventional technology In the spinning process, in order to produce high-quality yarn, firstly, the short fibers that are usually mixed in a few percent or more in the raw fiber group are removed, and a fiber sliver consisting of fiber bundles that are as parallel as possible is produced. It is important to use this. The most common means of removing short fibers currently in use are mechanical methods such as carding or combing, which apply a pulling action or combing action to the fibers or fiber bundles held at one end. . In addition, recently, between the opposing surfaces of two rotating cylindrical meshes facing each other with a predetermined interval,
A group of fibers is supplied while applying high-voltage static electricity, and short fibers are suctioned and removed from the back side of the cylindrical net, and the group of fibers arranged in the longitudinal direction is made into a web from the surface on the lower side of rotation of one of the cylindrical nets. A method using static electricity has been proposed, in which the material is drawn out in the same manner as before (Japanese Patent Application No. 63-6571).

Problems to be Solved by the Invention Among the short fiber removal methods described above, mechanical means such as carding and combing tend to cause fiber breakage, and conversely short fibers and neps are removed at the same time as short fiber removal. As a result, it was difficult to reduce the short fibers below a certain limit, and there were also problems such as hooks in the fibers and poor parallelism. On the other hand, when using static electricity, short fibers can be efficiently removed without causing any damage to the fibers due to the combined effect of static electricity and suction airflow, and fiber bundles with excellent alignment can be obtained without causing any hooks. . However, it is not possible to eliminate the crimp of the single fibers in this fiber bundle, and therefore, in order to obtain high-quality yarn, it must go through a drawing process, which is then directly supplied to a roving frame or an open spinning frame. I couldn't do that.

The present invention solves the above problems,
It is an object of the present invention to provide a method and apparatus for producing fiber sliver, which can remove short fibers by static electricity and obtain a fiber sliver with excellent alignment without crimp of single fibers.

Means for Solving the Problems In order to solve the above problems, the fiber sliver manufacturing method of the present invention applies a high voltage between the opposing surfaces of two rotating cylindrical meshes facing each other at a predetermined interval. While applying static electricity, the separated fiber group is supplied from the upper side of the rotation, the short fibers are suctioned and removed from the back side of at least one of the cylindrical nets, and the short fibers are removed from the lower side of the rotation of the cylindrical net in the longitudinal direction. The fiber sliver manufacturing apparatus is characterized by drawing out a group of fibers arranged in a web shape using a conveyor belt, and then drafting this fiber bundle into a fiber sliver of a predetermined thickness. two rotatable cylindrical nets facing each other; a static electricity generator for applying high voltage static electricity between the two cylindrical nets; and a rear surface of at least one of the opposing surfaces of the two cylindrical nets. a suction device disposed on the side; a fiber supply device disposed on the upper side of the rotation in the opposing portions of the two cylindrical nets; It consists of a short fiber removing device equipped with a conveyor belt for sending out fiber bundles provided in contact with the circumferential surface of the cylindrical mesh, and a fiber bundle drafting device provided close to the conveyor belt, and A sliver unevenness control device is provided either within the draft device or immediately after the draft device.

Effect In the above configuration, high-voltage static electricity is applied between two rotatable cylindrical meshes facing each other at a predetermined interval, which are attracted from at least one back side of the short fiber removal device. A group of fibers is divided into single fibers and supplied between the opposing surfaces from the upper side of the rotation, and the combined action of static electricity and suction airflow causes them to be oriented in the fiber axis direction, and the short fibers are directed to the back side of the cylindrical mesh. While efficiently removing the fibers by suction, the fiber bundles arranged in the fiber axis direction are pulled out in the form of a web with a desired thickness from the rotating lower side surface of one of the cylindrical nets using a conveyor belt. By drafting the fiber bundle with a drafting device to form a fiber sliver of a predetermined thickness, short fibers are efficiently removed, there are no hooks, the parallelism is excellent, and the crimp of each single fiber is sufficiently elongated. , the conventional combing process and the drawing process before and after it are omitted,
Fiber slivers that can be directly supplied to roving frames and various open-end spinning machines can be obtained all at once.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a schematic side view of a fiber sliver manufacturing apparatus according to an embodiment of the present invention, which is directly connected to a carding machine. In FIG. 1, a carding machine 1, a feed roller 2, a take-in roller 3, a cylinder 4, and a flat 5 are provided. The separation roller 9 of the fiber supply device 8 in the short fiber removal device 7 of the fiber sliver manufacturing device 6 is arranged close to the position where the carding action between the cylinder 4 and the flat 5 of the carding machine 1 is completed. are doing. The fiber supply device 8 includes the separating roller 9 that separates single fibers from the surface of the cylinder 4, and a duct 1 that leads the fiber group separated into single fibers away from the surface of the cylinder 4 to the next process.
It is formed by 0.

In the fiber sliver manufacturing device 6, the tip of the duct 10 of the fiber supply device 8 faces the inside of the frame 7a of the short fiber removing device 7. This short fiber removing device 7 has two cylindrical nets 11 and 12 whose rotating shafts are horizontally arranged inside a frame 7a, vertically parallel to each other, and their circumferential surfaces 11a and 12a arranged at a predetermined interval so as to be freely adjustable. The lower cylindrical mesh 12 faces the lower cylindrical mesh 11 and 12 with a straight line L connecting the rotation axes at a predetermined angle θ (approximately 20° to 30°) with respect to the vertical line. It is arranged so as to be inclined toward the cylinder 4. As for the predetermined interval, it is usually preferable that the interval 1 between both peripheral surfaces 11a and 12a on the straight line L is 1.5 to 2.5 times the effective fiber length of the fiber group. The cylindrical meshes 11 and 12 each have a circumferential surface 11
Three support rollers 13 are installed at both ends of a and 12a.
A, 13B, 13C, 14A, 14B, 14C, and one support roller 13A, 14A among them is driven and rotated, and in the upper cylindrical net 11, the support roller 13B is connected to a static electricity generating device. 15 and also the lower cylindrical mesh 12
In this case, the support roller 14B is grounded 16 and is also used as a connection terminal. Each support roller 13
A, 13B, 13C, 14A, 14B, 14C
are supported by support arms 17 and 18, which are respectively attached to the frame body 7a in a protruding manner. Both cylindrical nets 11 and 12 are attached at both ends to the left and right side plates of the frame 7a via thrust bearings (not shown) so that they can be freely inserted and removed in the direction of the rotation axis, allowing cleaning, inspection, and replacement. It can be easily inserted and removed as needed. Furthermore, pipe-shaped suction devices 19, 20 are installed inside both cylindrical nets 11, 12, and these suction devices 19, 20 have suction ports 19a with opening degrees corresponding to predetermined angles α and β. ,20
a, and can be inserted into and removed from the side of the cylindrical nets 11 and 12 in the same way as the cylindrical nets 11 and 12, for cleaning and replacement with suction ports 19a and 20a of desired opening degree. can be done easily. The cylindrical meshes 11 and 12 are, for example, metal porous plates,
A metal net, a conductive porous rubber sheet, or the like is used, preferably with a pore diameter of 3 to 6 mm and an aperture ratio of 40 to 60%.

Further, the opposing circumferential surfaces 1 of both cylindrical meshes 11 and 12
1a, 12a, the tip of the duct 10 of the fiber supply device 8 faces toward the upper side of rotation (left side in the drawing), and one end is placed on the peripheral surface 11a of the cylindrical net 11 from near the straight line L toward the lower side of rotation. The cylindrical mesh 1
Conveyor belt 21 running at the same surface speed as 1
is disposed in a direction intersecting the straight line L, and a nip belt 22 is provided on its upper surface side, one end of which is in contact with the circumferential surface 11a of the cylindrical net 11 and runs in the opposite direction to the conveyor belt 21. The fiber group can be peeled off in a web form from the peripheral surface 11a of the net 11, sandwiched between both belts, and pulled out in a direction intersecting the straight line L. Further, these conveyor belt 21 and nipple belt 22 each have a belt main body 21a, a drive roller 21b, a guide roller 21 and a bearing (not shown), and a belt main body 22a, a guide roller 22b and a bearing (not shown) that are integrally formed. As a single unit, each belt can be inserted and removed from the front frame side in the running direction, and cleaning, adjustment, replacement, etc. can be easily performed.

A draft device 25 for drafting a web-like fiber bundle with a guide 23 and a calender roller 24 interposed therebetween is disposed outside the frame 7a in close proximity to the conveyor belt 21 and nip belt 22 of the short fiber removing device 7. are doing. Although the draft device 25 is of a 3-over-3-wire system in this embodiment, it may be selected from other systems used in a normal spinning process as needed.

Further, a sliver unevenness control device 26 is installed following the draft device 25. This sliver unevenness control device 26 includes a measuring roller 26a and an adjusting roller, and measures the thickness of the sliver S with the measuring roller 26a using a method similar to that used in conventional spinning processes, and uses the measured value to measure the thickness of the sliver S using the measuring roller 26a. The measuring roller 26a and the adjusting roller 2
6b, the thickness of the sliver S can be controlled and a fiber sliver of uniform thickness can be obtained. Note that the sliver unevenness control device 26 may be provided inside the draft device 25,
Further, other methods than the measuring roller method may be used, such as a photoelectric method used in a normal spinning process.

In the above-mentioned series of devices, a group of fibers fed to a carding machine 1 by lapping or the like by a feed roller 2 is combed into single fibers by a cloth attached to the surface of a take-in roller 3, a cylinder 4, and a flat 5, and is combed into single fibers to remove contaminants. remove things, etc. On the other hand, on the opposite side of the take-in 3 of the cylinder 4, at the position where the carding action with the flat 5 has finished, there is a separation roller 9, which is provided with metallic clothing attached to the surface of the fiber supply device 8 of the fiber sliver manufacturing device 6. Due to the rotation of the cylinder 4, almost 100% of the single fibers held at the tips of the teeth of the cylinder 4 are separated by the generated airflow and centrifugal force, and the large airflow flowing forward passes through the duct 10 and is removed from the short fiber removal device 7. It can be guided between the opposing surfaces of the two cylindrical nets 11 and 12. This fiber group is applied with a high voltage (usually 30,000 to 50,000 volts) negative static electricity, and both cylindrical meshes 1
While operating the suction devices 19 and 20 of No. 1 and 12, and driving both the cylindrical nets 11 and 12, the conveyor belt 21, and the nip belt 22, the surrounding surfaces 11a of the opposing portions of the cylindrical nets 11 and 12
12a. The supplied fiber group gradually widens around the circumferential surfaces 11a and 12a of both cylindrical nets 11 and 12.
The fibers are arranged in a gradually elongated state due to electrostatic attraction and attractive force, and the fibers with relatively long fiber length are connected to each other to form a bridge between the two circumferential surfaces 11a and 12a. The short fibers are held in point contact with the circumferential surface without blocking the mesh, and the short fibers are held on both circumferential surfaces 11a and 12.
a floating back and forth due to electrostatic attraction, without continuing like a bridge, and between both peripheral surfaces 11a and 12.
It passes through the mesh a and is sucked into the suction devices 19 and 20 from the suction ports 19a and 20a and is removed. Both the cylindrical nets 11 and 12 move to the lower side while the long fibers are held between the circumferential surfaces 11a and 12a, and on the lower side near the narrowest point between the circumferential surfaces 11a and 12a, The fibers adhere to one end 21d of the conveyor belt 21 from the circumferential surface 11a of the cylindrical mesh 11, are caught in a state in which the fibers are arranged in the axial direction, are peeled off in a web shape, are sandwiched between the nip belt 22, and follow the straight line L. Proceed in a direction that intersects with the opposite direction. In this case, by adjusting the surface speeds of the cylindrical nets 11, 12 and the conveyor belt 21, a web of arbitrary thickness can be obtained. The web-shaped fiber bundle that has progressed while being held between the conveyor belt 21 and the nip belt 22 as described above is converged by the guide 23, drawn out as a thick web by the calender roller 24, and then drawn out by the draft device 25 at a large magnification (usually 4 ~8x) to make a thin web,
The sliver S is condensed and continuously guided to the sliver unevenness control device 26, and then passed through the measuring roller 26.
The thickness of the sliver S is measured by a, and the draft rate is adjusted between the measuring roller 26a and the adjustment roller 26b based on the data to make the sliver S of uniform thickness, and the sliver S is stored in the can 28 by the coiler 27. do.

The fiber sliver obtained in this example was
The short fibers are removed to the same extent as in the conventional combing process, and the fibers are oriented very well in the fiber axis direction, preventing hooks from forming and damaging the fibers. Since it is not subjected to mechanical force, the quality does not deteriorate, and furthermore, following the removal of short fibers, sufficient drafting is performed all at once, reducing crimp and adjusting the thickness.
It can be fed to the roving process or directly to various open-end spinning machines without going through the traditional drawing process, greatly shortening the spinning process and significantly improving quality and productivity. .

Effects of the Invention As described above, in the fiber sliver manufacturing method and fiber sliver manufacturing apparatus of the present invention, a carded web can be processed into short fibers to the same extent as those through a combing process, very easily and without damaging the fibers. is removed to create a web with good fiber alignment, no hooks, and sufficient thickness. This is then drafted at a predetermined magnification, and the crimp is sufficiently elongated to obtain the desired thickness, which is then directly passed through the roving frame. The fiber sliver that can be supplied to various open-end spinning machines can be supplied all at once, greatly shortening the spinning process.
It has exceptional effects such as improving quality and productivity and reducing costs.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a fiber sliver manufacturing apparatus according to an embodiment of the present invention, which is directly connected to a carding machine. 6... Fiber sliver manufacturing device, 7... Short fiber removal device, 8... Fiber supply device, 11, 12...
Cylindrical mesh, 15... Static electricity generator, 19, 20
...Suction device, 21...Conveyor belt, 25...
...Draft device, 26...Sliver unevenness control device.

Claims (1)

[Claims] 1. A method in which a group of separated fibers is supplied from the upper side of the rotation while applying high-voltage static electricity between the opposing surfaces of two rotating cylindrical meshes facing each other with a predetermined interval between them. ,
The short fibers are removed by suction from the back side of at least one of the cylindrical nets, and the fiber bundles arranged in the longitudinal direction are pulled out in the form of a web by a conveyor belt from the rotating surface of one of the cylindrical nets. A method for producing a fiber sliver, comprising drafting the fiber into a fiber sliver of a predetermined thickness. 2. Two rotatable cylindrical nets facing each other with a predetermined interval, a static electricity generator that applies high voltage static electricity between the two cylindrical nets, and opposing surfaces of the two cylindrical nets. a suction device disposed on the back side of at least one of the two cylindrical nets; a fiber supply device disposed on the upper side of the rotation in the opposing portions of the two cylindrical nets; A short fiber removal device comprising a conveyor belt for sending out fiber bundles provided in contact with the peripheral surface of one of the cylindrical nets on the lower side, and a fiber bundle drafting device provided close to the conveyor belt. Sliver manufacturing equipment. 3. The fiber sliver manufacturing apparatus according to claim 2, further comprising a sliver unevenness control device provided either within the draft device or immediately after the draft device.