JP2006200107A - Apparatus for cutting fiber strand - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for efficiently and surely cutting a fiber strand even when the diameter of the fiber strand is relatively large such as about several cm. <P>SOLUTION: The fiber strand is cut. In the process, one end of the fiber strand is held with a holding part and the fiber strand is withdrawn into a processing position by moving the holding part. Both ends of the fiber strand are fixed and one end thereof is rotated with the withdrawing axis as the center to thereby twist the fiber stand and strengthen the mutual binding force of each single fiber. The fiber strand before and after parts for cutting the twisted fiber strand is compressed and fixed and then cut with the cutting part moved toward the fiber strand. Thereby, even a fiber strand having a relatively large diameter is surely cut. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention cuts a long fiber bundle-shaped industrial waste into a length of a predetermined size, and a fiber bundle cutting method that can cut well even a fiber bundle having a relatively large diameter And a cutting device.

Conventionally, various types of crushers are known as means for dividing various industrial wastes into small pieces having a predetermined size. Among these, shearing type crushers are often used for industrial wastes of relatively soft materials, and are roughly classified into uniaxial and biaxial types.

The uniaxial shear crusher includes a rotary blade attached to the outer peripheral surface of the rotating cylindrical body and a fixed blade, and crushes by biting the gap between the rotary blade and the fixed blade. As a technique related to such a crushing apparatus, a technique described in JP-A-9-57138 is known.

The biaxial shear crusher includes a pair of rotating blades whose rotating shafts are arranged horizontally and in parallel, and crushes objects to be crushed dropped from above by biting them into the interval between the rotating blades. Conventionally, this type of twin-screw crusher is described in, for example, Japanese Patent Laid-Open No. 5-23608.

On the other hand, as a method for producing a short fiber bundle from a long fiber bundle, conventionally, a fiber is cut between a moving blade rotating up and down or rotating while feeding fibers to be cut little by little onto a fixed blade attached to a table end. Fiber cutting devices that cut by force have been widely used.

As an example of this type, a fiber cutting device is provided with a guide for wrapping the fiber bundle with a sheet-like material in front of the cutting portion so that the fiber bundle can be reliably cut. It is described in 2003-11962 gazette.

Similarly, a technique for winding a tape around a long fiber bundle, moving the fiber bundle by a predetermined pitch, and cutting between the bound portions is described in Japanese Patent Laid-Open No. 5-177487.

As a method of manufacturing a short fiber bundle from a long fiber bundle, a fiber bundle is wound around a cylindrical body in which a plurality of blades are arranged at regular intervals on the outer periphery, and continuously cut into a predetermined length while pressing the fiber bundle. A roller cutter type cutting machine is also widely used. As an example of such a technique, the technique of Unexamined-Japanese-Patent No. 2003-268634 is described.
Japanese Patent Laid-Open No. 5-23608 JP-A-9-57138 JP 2003-11962 A Japanese Laid-Open Patent Publication No. 5-177487 JP 2003-268634 A

In order to dispose of industrial waste efficiently, it is necessary to divide it into small pieces that are easy to dispose of and recycle. By cutting and reducing the volume, storage and transportation become easy. Various types of cutting devices and crushing devices have been developed for finely cutting and crushing industrial waste in this way, many of which are suitable for cutting relatively hard waste. is there.

Industrial waste made of a soft material is flexible and easily deformed, and in crushing and cutting by a shearing action, it often enters a gap such as a blade and cannot be crushed or cut well. In particular, in the case of a fiber material, since it is flexible and the binding force between each single fiber is weak and not united, the fiber bundle is likely to enter the gap between the cutting edges and cannot be cut well.

In addition, if it is cut in advance and not put into a predetermined amount, a very large cutting force is required, and an excessive load may be generated, and the crushing or cutting operation may not be continued. On the other hand, it takes a lot of labor to divide it into small bundles manually, and the work efficiency is extremely low.

On the other hand, in the case of the roller cutter type, when the fiber bundle has a large diameter, it is necessary to increase the protruding dimension of the cutter blade. However, the possibility of damage to the cutter blade itself increases. Therefore, it can be said that this is a method suitable for cutting a small-diameter fiber bundle.

When cutting using a rotary blade, if the fiber bundle is not securely fixed, a part of the fiber may be entangled with the rotary blade or its rotating shaft, or may not be cut reliably. In particular, when the diameter of the fiber bundle is relatively large, it is not easy to securely fix each single fiber, so that cutting becomes more difficult.

In the method of binding and cutting a fiber bundle with a sheet-like material or a tape or the like, a secondary material such as a sheet or a tape, a bundling device, and a sorting device are required, which causes a complicated device.

The present invention provides a method and an apparatus for efficiently and reliably cutting a fiber bundle even when the fiber bundle has a relatively large diameter of about several centimeters.

When a fiber bundle is cut, a twist is applied to the fiber bundle to increase the binding force between the single fibers and to apply tension, so that even a fiber bundle having a relatively large diameter is surely cut. A cutting method and a fiber bundle cutting device are provided.

The fiber bundle cutting device is configured to supply a fiber bundle, and to supply a fiber bundle and to fix the end of the fiber bundle when twisting the fiber bundle; After that, a rotating part having a rotating part that rotates the gripping part around the drawing shaft, and a moving table that supports and moves the gripping part and the rotating part so as to pull out the fiber bundle in the drawing direction are configured. .

One end of the fiber bundle, which is an object to be cut, is supplied to the gripping part through the guide hole of the supply part and gripped. After the gripping part grips one end of the fiber bundle, the gripping part moves in the pulling direction together with the moving table, and pulls the fiber bundle to the processing position.

When the fiber bundle is pulled out to the processing position, the fixing unit provided in the supply unit fixes the fiber bundle in the supply unit. Next, the rotating portion rotates the gripping portion around the drawing shaft, thereby twisting the fiber bundle and increasing the binding force between the fibers.
The apparatus may be simplified by supplying and holding the fiber bundle and fixing operation in the supply unit to the supply unit and supplying and gripping by an operator.

The fiber bundle cutting device includes a fixing member for fixing the front and rear of a portion to be used for cutting after twisting the fiber bundle and means for moving the fixing member. As a method for fixing the fiber bundle, either a method in which a plurality of fixing portions move to each other so as to sandwich the twisted fiber bundle, or a method in which one of them is fixed may be used.

The plurality of cooperating fixing members and the fiber bundle move relative to each other so that the fixing member sandwiches the fiber bundle, and compress and fix the twisted fiber bundle before and after the portion to be cut. When fixing a fiber bundle by a fixing member, a method in which a plurality of fixing members are moved by fixing the fiber bundle and a gripping part and a supply part that support the fiber bundle, and one fixing member is fixed, and the fiber bundle and the support are supported. Any of the gripping unit and the supplying unit to be moved and the method of moving the other fixing member may be used.

The fiber bundle cutting device includes a cutting portion including a cutting blade that cuts the fiber bundle along a cutting line orthogonal to the drawing axis, and means for moving the cutting portion toward the fiber bundle. The cutting part may be provided with any moving means for cutting the fixed fiber bundle, or any of the methods in which the fixing member that fixes the cut portion and the fiber bundle is provided with the moving means may be used.

The cutting blade moves from the predetermined position along the cutting line toward the fiber bundle, and cuts the fiber bundle pressed and fixed among the plurality of fixing members on the cutting line. When the cutting is completed, the cutting unit returns to a predetermined position.

The series of steps is completed up to the above steps, but the gripping portion is moved again to the gripping position, and the end of the fiber bundle fixed to the supply portion after being cut is held again, and the supply portion is fixed. It is preferable that the processing can be continuously performed by repeating a series of steps after releasing the fiber bundle.

Hereinafter, specific examples of embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional side view of a device layout in which a plurality of cutting portions and a fixing portion are vertically arranged so as to sandwich a workpiece, when the workpiece is supplied. This cutting device draws out a long fiber bundle as an object to be cut from the supply unit 2 to the processing position by the gripping unit 1, twists the fiber bundle by rotating the gripping unit 1, and then puts it on the cutting table 7. This is a cutting device that is cut by the cutting unit 10 after being pressed and fixed by the holding unit 8.

The gripping part 1 is supported by a moving table 4 that moves from a gripping position to a processing position along a moving rail 5 that is arranged in parallel with the supply direction of the long fiber bundle F. The long fiber bundle F, which is an object to be cut, is supplied to the gripper 1 that has passed through the guide hole of the supply part 2 and moved to the gripping position. The tip of the gripping part 1 is provided with a relatively movable structure for gripping the fiber bundle with the fiber bundle interposed therebetween, and its driving means, and grips the supplied workpiece.

After the gripping portion 1 grips the fiber bundle F at the gripping position, the movable table 4 travels from the gripping position to the processing position in the drawing direction, and pulls the fiber bundle F to the processing position. The supply unit 2 has a fixing unit 6 composed of a plurality of relatively movable members for sandwiching and fixing the drawn fiber bundle F, and one end of the fiber bundle F drawn to the processing position is provided in the supply unit 2. Fix it.

The rotating unit 4 is supported by the movable table 4 and includes driving means for rotating the gripping unit 1 around the fiber bundle drawing shaft. After one end of the fiber bundle F moved to the processing position on the supply unit 2 side is fixed by the fixing unit 6, the rotating unit 4 rotates the gripping unit 1 by a predetermined number of rotations. This rotation action twists the fiber bundle.

FIG. 2 shows a schematic side sectional view of the present cutting apparatus during cutting. The moving table 4 that supports the supply unit 2 and the gripping unit 1 cooperates with a driving unit that moves to a predetermined position so that the fiber bundle F is positioned on the cutting table 7 provided below the fiber bundle F. Prepare. The pressing unit 8 presses the fiber bundle F onto the cutting table 7 and compresses and fixes the fiber bundle F before and after the cutting line.

The cutting table 7 is provided with the same number of slits 9 at equal intervals as the cutting portions 10 in a direction orthogonal to the supply direction. The cutting portions 10 are arranged in parallel at predetermined intervals so as to be positioned on the extension line of the cutting line orthogonal to the supply direction.

The cutting unit 10 is fixed to a drive shaft 11 positioned below the cutting table 7 and is rotated by driving of a drive motor 12. The drive shaft 11 and the drive motor 12 are supported by the cutting unit moving base 13. The cutting unit moving base 13 includes moving means for moving the cutting unit 10 on a cutting line from a direction orthogonal to the supply direction. The cutting part 10 moves on the cutting line along the slit 9 provided in the cutting table 7 and cuts the fiber bundle F. The cutting part 10 is preferable because a rotary blade having a sharp cutting edge is not clogged.

The cutting unit 10 that has finished cutting returns to a predetermined position together with the cutting unit moving base 13. The to-be-cut object holding | suppressing part 8 also returns to a predetermined position, and the holding part 1 releases the fiber bundle that has been held.

Although not shown in FIGS. 1 and 2, the fiber bundle discharge plate is disposed on the cutting table 7, and includes moving means that contacts the surface of the cutting table 7 and moves on the surface. The fiber bundle discharge plate discharges the cut fiber bundle F out of the table after the cutting unit 10 returns to a predetermined position. In the embodiment shown in FIG. 1, the cutting table 7 is arranged horizontally, but if the cutting table is installed with an inclination to the extent that the fiber bundle after cutting naturally falls, or if it is installed vertically, it will be cut Since it is not necessary to provide an object discharging apparatus, the apparatus can be simplified and is preferable.

The gripping portion 1 moves to the gripping position, grips the end portion of the fiber bundle F after being cut in a state of being fixed to the supply unit 2, and then repeats a series of operations to perform continuous cutting. .

By arranging a plurality of cutting parts together with the pressing part so as to be parallel to each other with a certain interval on the drawer shaft, it is possible to cut a plurality of places in one step, so that the work efficiency can be improved. Is preferred.

In addition, this invention is not limited to the thing of the said embodiment, A various change is possible as needed.

The invention's effect

Using the method and apparatus of the present invention, it was confirmed that even a fiber bundle having a relatively large diameter of about several centimeters can be cut well even if a motor with a relatively small output is used. At this time, it was possible to confirm the effectiveness of including the step of twisting the fiber bundle by comparing the case of adding the twist to the fiber bundle and the case of not including the step of adding the twist to the fiber bundle with the same conditions such as the material. . Moreover, even in the cutting of a fiber bundle having a small single yarn diameter, which is relatively easy to cut among the fibers, it was possible to cut well.

Manual cutting requires work by at least three workers, but when the cutting method and cutting device according to the present invention are used, only one worker can operate, greatly saving labor. In addition to being able to improve efficiency, it also has a significant effect on reducing the burden on workers.

It is preferable to use a round blade for the rotary blade rather than a circular saw blade which is easily clogged. Since a compressive force is applied to the fiber bundle by the fixing member after twisting the fiber bundle, the cross-sectional area of the fiber bundle cut surface is reduced, so that there is no scorching due to friction between the fiber bundle cut surface and the rotary blade. It was. As a result, it can be said that it is also effective as a pretreatment step in recycling and recycling the waste fibers.

Schematic cross-sectional view when supplying workpiece

Schematic cross-sectional view when cutting an object

Claims (5)

In the case of cutting a long fiber bundle into a predetermined size, the method includes a step of twisting the fiber bundle by fixing both ends of the fiber bundle before cutting and relatively rotating the both ends. A fiber bundle cutting method. The fiber bundle cutting method according to claim 1, further comprising a step of compressing and fixing the fiber bundle at positions immediately before and immediately after a portion of the fiber bundle to be cut. A supply provided with a gripping portion that holds one end of the supplied fiber bundle at the supply position, travels in the drawing direction and pulls the fiber bundle to the processing position, and means for fixing the drawn fiber bundle at the supply position A fiber bundle cutting device comprising: a gripping portion rotating means for rotating the gripping portion around the pulling shaft. The fiber bundle according to claim 3, further comprising a structure in which the fiber bundle drawn to the processing position is compressed and fixed by a plurality of relatively moving fixing members immediately before and after the portion to be cut. Cutting device. A structure in which the fiber bundle drawn to the processing position is compressed and fixed by a plurality of relatively moving fixing members immediately before and after the portion to be cut, and the cutting portion for cutting the fiber bundle is parallel to the cutting line. The fiber bundle cutting device according to claim 3, wherein a plurality of fiber bundles are arranged at equal intervals on the drawing direction of the fiber bundle.

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