JP3953154B2 - Aramid fiber bundle cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for continuously cutting a fiber bundle made of para-based polyamide (hereinafter simply referred to as “aramid”) into a shortcut cotton.
[0002]
[Prior art]
Conventionally, various cutting devices are known in order to use a synthetic fiber bundle as a shortcut cotton. For example, in Japanese Utility Model Publication Nos. 61-38916 and 61-58568, a synthetic fiber bundle is wound around a drum in which cutting blades are radially arranged on the outer peripheral surface, and the wound fiber is wound around the outer peripheral surface. There has been proposed a drum cutter type fiber bundle cutting device that presses a cutting blade with a pressing roller to cut it.
[0003]
However, although this apparatus is effective for cutting synthetic fibers such as polyester and nylon, it has a high strength and high modulus para-aramid fiber (for example, Teijin's Technora, DuPont Kevlar). In order to cut the traveling yarn made of the above, there is a big problem. That is, as is clear from the fact that aramid fibers are used as anti-blade garments and bullet-proof garments, it is extremely difficult to cut continuously and reliably with the above-mentioned apparatus, and it is used as a cutting apparatus for aramid fibers. I can't.
[0004]
Also, a so-called “guillotine type fiber bundle cutting device that continuously supplies a fiber bundle between the fixed blade and the movable blade using a movable blade meshing with the fixed blade and continuously cuts the supplied fiber bundle. Is also known. However, even if such a cutting device is used, when trying to cut aramid fiber, a part of the fiber bundle is inevitably left as a miscut, and it is extremely difficult to continuously and reliably use a shortcut cotton. Have difficulty.
[0005]
[Problems to be solved by the invention]
In view of the problems described above, the object of the present invention is to provide an aramid fiber bundle that can be reliably cut without leaving a part of the fiber bundle as a miscut when continuously cutting the aramid fiber bundle into a shortcut cotton. To provide a cutting device.
[0006]
[Means for Solving the Problems]
Here, according to the present invention, a fixed blade, a movable blade that can be moved up and down or left and right with respect to the fixed blade to cut the fiber bundle, a driving means for the movable blade, and the fiber bundle are fixed blade and movable blade. the gap between the supply supply means, the gripping means of the fiber維束, and the fixed blade and the fixed blade and the movable blade during the fiber bundle cut into contact with the movable blade when the engagement of the movable blade between the 1 cutting device aramid fiber bundle comprising a cutting device aramid fiber bundles containing between gap regulating member that maintain the ~10μm is provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic perspective view illustrating an apparatus for cutting an aramid fiber bundle according to the present invention. In the figure, reference numeral 1 denotes an aramid fiber bundle cutting device. Here, the cutting device 1 includes a fixed blade 2, a movable blade 3, a pressing roller 4, a feed roller 5, a frame 6, a joint 7, a crank 8, a flywheel 9, a gap regulating member 10, and a fiber bundle supply guide 11. Etc. are configured.
[0008]
In the cutting device 1, the pressing roller 4 and the feed roller 5 form a pair of nip rollers, and the pair of nip rollers sandwich the aramid fiber bundle between the fixed blade 2 and the movable blade 3. It plays the role of supplying the fiber bundle, and also serves as a gripping means and supply means for the fiber bundle. The movable blade 3 is fixed to a holder 30 so that the holder 30 can slide up and down without engaging and sliding with the left and right grooves provided in the frame 6 and swinging in the left and right and front and rear directions. It has a simple structure. Further, such engagement sliding need not be limited to the illustrated mechanism, and it is needless to say that a known thrust motion mechanism can be used. In this case, a thrust bearing is used to hold the holder 30 and the groove. It is also possible to reduce the friction between the two.
[0009]
In the aramid fiber bundle cutting apparatus configured as described above, a fiber bundle (not shown) is passed between the pair of nip rollers (4 and 5) from the fiber bundle supply guide 11 and is fixed while being gripped. Is continuously supplied between the fixed blade 2 and the movable blade 3 at a speed of 2 mm. At this time, since the movable blade 3 and the crank 8 are connected via the joint 7, the movable blade 3 is driven in the vertical direction in the figure by the crank 8 driven by a motor (not shown). Therefore, the supplied fiber bundle is cut at a predetermined interval by appropriately adjusting the relationship between the rotation speed of the crank 8 and the supply speed of the fiber bundle. A flywheel 9 is provided so that the crank 8 rotates smoothly.
[0010]
Here, in the present invention, it is one feature that the gap regulating member 10 for maintaining the gap at the time of cutting between the fixed blade 2 and the movable blade 3 at 1 to 10 μm is provided. This will be described in detail with reference to FIG. However, for easy understanding of the drawing, the basic elements of the fixed blade 2, the movable blade 3 and the gap regulating member 10 of the cutting device 1 of FIG. 1 are taken out and the aramid fiber bundle is cut by the device of the present invention. It is the figure explaining the effect | action. In addition, each figure in this figure is the figure (a) front view, the figure (b) side view, and the figure (c) principal part enlarged view (the side which showed the meshing state of the fixed blade 2 and the movable blade 3) Further, in FIG. 5 (b), the state in which the movable blade 3 moves downward while meshing with the fixed blade 2 and the gap regulating member 10 (the locus of the movable blade 3) is indicated by a one-dot chain line.
[0011]
In the drawing, a fiber bundle (not shown) is continuously held in a space S surrounded by the fixed blade 2, the movable blade 3, and the gap regulating members 10 , 10 while being gripped by the pair of rollers 4 and 5. Supplied. At this time, the gap regulating members 10 and 10 are provided at both left and right ends, and also play a role of regulating the fiber bundle so as not to be shifted to the left and right at the time of cutting. The fiber bundle supplied to the space S is cut by a shearing force acting between the two blades when the movable blade 3 moves downward and meshes with the fixed blade 2.
[0012]
At this time, it is important to set the gap G between the fixed blade 2 and the movable blade 3 to be 1 to 10 μm by interposing the gap regulating member 10 as shown in FIG. Even if such a condition is not satisfied, the polyester fiber bundle or the nylon fiber bundle can be easily cut, but this condition is essential when the aramid fiber bundle is cut. Therefore, in the present invention, the interposition of the gap regulating member 10 is essential for this reason. Here, when the gap G is less than 1 [mu] m, it is hardly properly evenly to the gap adjust the entire blade length between the fixed blade 2 and movable blade 3, and easily fixed blade 2 and the movable blade due to disturbance such as vibration 3 is not preferable. Further, when the gap G is larger than 10 [mu] m, to elicit a situation single textiles constituting the aramid fiber bundle is sandwiched without being cut between the fixed blade 2 and movable blade 3, it is not preferred. This phenomenon becomes more prominent as the single fiber diameter decreases (single fiber denier decreases). Therefore, it is preferable to reduce the gap G as the single fiber diameter decreases.
[0013]
Even if the aramid fiber bundle is cut, the strength and modulus of the aramid fiber bundle, or the single fiber diameter and the number of constituent single fibers vary depending on the brand. For this reason, it is preferable to make the gap G variable according to the brand, and the gap G may be appropriately selected within the range of 1 to 10 μm according to the optimum cutting conditions of each brand. Although not described in detail here as a device for making the gap variable, it goes without saying that a known feeding device having a precision screw feeding mechanism or the like can be used, and the gap G can be adjusted by this.
[0014]
Next, in the cutting device of the present invention, it is preferable to provide a pressing means for pressing the movable blade 3 against the regulating member 10 so that the gap G does not change due to disturbance such as vibration. This embodiment will be described in detail below with reference to FIG. In this figure, FIG. (B) is a partial perspective view in which some components of the cutting device 1 shown in FIG. 1 are extracted, and FIG. (A) is a cut surface P in FIG. (B). It is a perspective view which shows the partial cross section in (shaded).
[0015]
In FIG. 2B, the “pressing means” includes a pressing plate 12, a pressing plate member 13, a coil spring 14, and a pressing adjusting screw. Accordingly, the holder 30 with the movable blade 3 fixed is always subjected to a force that is pressed against the gap regulating member 10 by the pressing plate 12 to which an appropriate pressing is applied by the coil spring 14 and the pressing plate member 13, such as vibration. The gap G does not fluctuate due to the disturbance.
[0016]
【The invention's effect】
As described above, according to the present invention, even an aramid fiber bundle can be continuously cut into a shortcut cotton, and a part of the fiber bundle does not remain as a miscut, There is an extremely remarkable effect that it can be surely cut.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating an apparatus for cutting an aramid fiber bundle according to the present invention.
FIGS. 2A and 2B are explanatory views for explaining the operation of the cutting device of the present invention, wherein FIG. 2A is a front view , FIG. 2B is a side view, and FIG.
3 is a partial sectional view (perspective view) of an essential part, and (b) a partial perspective view of FIG. 1 exemplifying the pressing means of the present invention.

Claims (1)

The fixed blade, the movable blade retractably vertically or horizontally with respect to the fixed blade to cut the fiber bundles, the drive means of the movable blade, supply means for supplying between the fixed blade and the movable blade of fiber bundles while you keep gripping means fiber維束, and the gap between the fixed blade and the fixed blade and the movable blade at the time in contact with the movable blade fiber bundle cut to move when the engagement of the movable blade in 1~10μm A device for cutting an aramid fiber bundle including a gap regulating member.

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