JPS63165576A - Continuous cutter of fiber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a continuous cutting machine for fibers, and in particular for cutting hollow fibers with selective permeability used in ultrafiltration, dialysis, reverse osmosis, etc., or brushes. The present invention relates to a cutting machine that continuously cuts fibers used in applications such as fibers, optical fibers, etc.

[Prior Art] Conventionally, monofilament or multifilament continuous fibers that are continuously produced are collected into a total of 100 hexagonal fibers as shown in FIG. 7 to form thick annular TA fiber bundles 101.
After wrapping the convergence tape 102 around both ends of each side, the fiber bundle 101 is wrapped around the outside 103 of the convergence tape 102.
The fiber bundle 104 was cut to obtain a w1ra bundle 104 shown in FIG. 8 (for example, see Japanese Patent Publication No. 58-30057). Temporarily seal the end with adhesive, store it in a cylindrical casing, seal the hollow fiber end and the inner wall of the casing with adhesive such as polyurethane, and then cut the adhesive seal (at this time, The tape-wrapped portion was removed) to form an open end of the hollow fiber to form an M module.

[Problems to be Solved by the Invention] However, in the above-mentioned prior art, the annular mm bundle 1 in FIG.
Since the fiber bundles 101 are kept wound around each other for a long time, the fiber bundle 101 wound around the corners 105 of the total 100 has a curl. Therefore, this portion has to be discarded as waste yarn, resulting in poor yield.

In addition, after cutting the first part on the fiber 100, the tension is released and the remaining fibers hang down, making the cutting process difficult. There is a problem in that each end 106 of the fiber bundle 104 is likely to be irregular or cut, that is, accurate cutting cannot be performed, making it difficult to obtain a fiber bundle 104 of uniform quality.

Moreover, such a fiber bundle 104 may make it difficult to accommodate the fiber bundle in a cylindrical casing, or its quality may deteriorate.

Therefore, it may be possible to solve the above-mentioned conventional problems by cutting the continuously flowing fibers and bundling them together. However, with this method, for example, there is a risk that a large number of light, cut Fams may be scattered, making it difficult to form them into a fiber bundle. In other words, this results in a significant decrease in manufacturability.

This invention was made in view of the above problems, and an object of the present invention is to provide an am continuous cutting machine that can accurately cut fibers at a high yield without causing a decrease in productivity.

[Means for Solving the Problems] In order to achieve the above object, the present invention comprises a pair of retraction cutting devices that reciprocate in the flow direction of continuously flowing fibers and alternately cut the fibers. This pull-in cutting device includes a pincher that pinches the fiber near the cutting point, a cutter that cuts the fiber, and a support device that is provided downstream of the pincher and cutter in the flow direction. .

The fibers are pinched by a pincher at a first position in the flow direction, drawn to a second position set on the downstream side, and then horizontally cut into a set length by a cutter. The cut fibers are removed by the supporting device before being released from the grip by the pincher of the other retractable cutting device.
It is supported in a horizontal state and is prevented from hanging down, and the support is released and it falls into a predetermined position.

[Function] According to the present invention, since the fibers that are continuously flowing are cut, there is no need to completely wind them as in the conventional method, and there is no risk of the fibers becoming curly, so the yield is improved. do. In addition, since the fibers are held in the vicinity of the cutting point, the fibers at the cutting point can be stably gripped, resulting in good cutting workability and accurate cutting.

In addition, this invention cuts the fibers horizontally and supports them horizontally to prevent them from hanging down, so there is no risk of light fibers scattering when they fall, and a pair of retraction cutting devices are provided. This allows continuous cutting of continuously flowing fibers. Therefore, manufacturability is excellent.

[Example] An example of the present invention will be described below with reference to the drawings. As an example, hollow fibers having permselectivity (hereinafter referred to as TA fibers) used in artificial kidneys and the like will be described.

First, in FIG. 1 showing an outline of the entire method for manufacturing a fiber bundle according to the present invention, f is one or more fibers that are continuously manufactured or taken out from a bobbin, such as cellulose, polyvinyl alcohol, Fibers made of ethylene-vinyl alcohol, polyacrylonitrile, polymethyl methacrylate, polysulfone, etc. In addition,
In this example, the fibers f are thermoplastics.

A is the cutting process, and 1 eaf flows continuously in the direction of arrow B.
In this process, the material is pulled horizontally and cut to a set length. C is an accumulation process, in which a large number of cut fibers f are stacked. D is a forming step, which consists of a step Da in which both ends of the accumulated fiber bundle F are bundled into a predetermined shape in the radial direction, and a step Db in which the ends of the bundled fibers F are fixed together. In FIG. 1, while the fiber bundle F is being rotated in the direction of arrow E, the ends of the fiber bundle F are fixed by applying adhesive d to both end faces Fa by discharging it from a nozzle.

To fix both ends of the fiber bundle F, tape or a rubber band may be wound around the ends of the bundled fiber bundle F. Also the first
In the figure, both ends of the fiber bundle F are focused and fixed, but in the case of a fiber bundle F to which external pressure is applied, only one end is fixed. G is a take-out process, which is a process to take out the fiber bundle F to the next process. In the boxing process, the fiber bundles F taken out are packed into boxes.

In FIG. 3, FIG. 2 is a front view showing a part of the fiber bundle manufacturing apparatus, and FIG. 3 is a plan view of the same.

The above manufacturing device mainly consists of a feeding device 1 that continuously feeds a large number of fibers f in the direction of arrow B, and a continuously flowing fiber @f.
A continuous cutting machine consisting of a pair of left and right retracting cutting devices 2.3 that cut the fibers to a set length while pulling them together, a large number of packets 4 in which the fibers f cut to the set length are accumulated, and the packets 4 shown in Fig. 2 are transported. It consists of a transfer device 5 that binds the Fa fibers F, a convergence device (not shown) that bundles the Fa fibers F, and the like. In addition,! aM bundle F
Regarding the entire manufacturing equipment, for example, Japanese Patent Application No. 61-1988
No. 6405.

In FIG. 3, the feeding device 1 includes a guide roller 11 and a dancer roller 12 that swings in the vertical direction.

The retraction cutting devices 2 and 3 have the same configuration and are symmetrical to each other, and each includes a longitudinal feeding device 21.31 and a longitudinal feeding device 2.
1.31, a slide block 22.32 that is reciprocated in the vertical direction, a cam device 23.33 in FIG. 2, a spacing device 24.34 in FIG. , 36, and a clamping plate (supporting device) 20.30. FIG. 4 mainly shows the pincher 1124 in the retractable cutting device 2 on the left, and mainly shows the cutter 35 and the wiper 36 in the retractable cutting device 3 on the right.

The vertical feed device 21.31 in FIG. threaded rod 21b,
31b is a stepping motor or servo motor 21
a, 31a. This vertical feed device 21.3
1 causes the slide blocks 22.32 to reciprocate in the longitudinal direction. In the cam device 23, 33 shown in FIG. 4, inverted T-shaped cam bases 23b, 33b are mounted on rails 23a, 33a extending in the transverse direction, and air cylinders 23c, 3
It is provided so that it can freely reciprocate in the lateral direction by the operation of 3c. Heater cams 23d, 3 are attached to the cam bases 23b, 33b.
3d, aperture cams 23e, 33e and sweeping cams 23f
, 33f are provided protrudingly.

The scissor 24, cutter 35 and wiper 36 are supported with their sliding rods 24a, 35a and 36a inserted into slide blocks 22.32 so as to be slidable laterally, respectively, and brackets 24b, 35b and 36a. 36b
Cam rollers 24c and 35 rotatably supported by
c and 36c are the respective cams 23d, 33e and 3
It rolls along 3f. 24d, 35d and 36d are coil springs provided between the slide block 22.32 and the brackets 24b, 35b and 36b,
The cam rollers 24c, 35c, and 36C are pressed toward the cams 23d, 33e, and 33d, respectively.In this embodiment, the cutter 35 is equipped with a hot plate 37 for thermally cutting the fiber mf. The hot plate 37, which may be provided with a cutter instead of the plate 37, is fixed to the tip of the sliding rod 35a and is T-shaped, with the tip portion 37a formed thin as shown in FIG. There is.

Reference numeral 38 denotes a dispensing member, which is formed into two prongs, and has a distal end 38a.
, 38a are both side surfaces 37 of the tip portion 37a of the hot plate 37.
b, and is fixed to the tip of the sliding rod 36a shown in FIG. The distal end portion 38a of the wiping member 38 is provided with a U-shaped notch 38b that comes into contact with the fibers and wipes them off.

The sandwiching machine 24 has a pair of mutually symmetrical racks 24e.
, 24e are fixed to the tip of the sliding rod 24a, and pinions 24f, 24f are engaged with the racks 24e, 24e. The pinions 24f, 24f mesh with each other and are rotatably supported by the slide block 22.

These pinions 24f, 24f have arms 24g, 2
4g, sandwiching members 29A and 29B are provided at the position of the hot plate 27, as shown in FIG.

In FIG. 5, the sandwiching members 29A and 29B have two mutually parallel flat plates 29 on their bases 29Aa and 29Ba.
Ab and 29Bb are integrally formed, and this flat plate 29A
b, 29Bb engage vertically. Said flat plate 29Ab, 2
9Ab, 29Bb, and 29Bb are provided with guide portions 29Ac and 29Bc cut out in a V shape, and clamp portions 29Ad and 29Bd cut out in a U shape. In other words, Hashimi machine 24 ha1afa f All the above! i part 29Ad,
29Bd, the hot plate 27 can be used to pinch the cutting part near both sides of the cutting part. Note that when cutting is performed using a knife instead of the hot plate 27, the cutting part may be pinched only near at least one side of the cutting part.

The clamping plate 20.30 in FIG. 3 is provided on the downstream side in the flow direction B of the clamping plate m24.34 and the cutter 25.35, is fixed coaxially with the pinions 24f, 24f in FIG. As shown in the figure, it is composed of two plates, upper and lower, each having a cross-sectional shape. This clamping plate 20 supports m1lif by clamping it when the clamping members 29A and 29B in FIG. 5 clamp and tilt m and Iaf. To prevent the distal end side fa from hanging downward.

In FIG. 2, reference numeral 40 denotes a primary reservoir, which is provided directly below the fibers f to be cut to receive the fibers mf that fall after being cut, and is counted by a detector (not shown). Reference numeral 40a denotes a shutter, which is provided at the lower part of the secondary reservoir 40, and when the shutter 40a is opened, the fibers f fall into the secondary reservoir 41. This secondary storage device 41 stores the fallen fibers f for several times, and is provided by a shutter 4 similar to the shutter 40a.
1a is provided.

A large number of the packets 4 are fixed to the chain 751 of the transfer device 5 at equal pitches P, and are divided into two in the axial direction of taMlt, as shown in FIG. Reference numeral 42 denotes an edge alignment device, which taps lightly to align the edges of i#Imf, which become uneven during dropping or transportation. The edge alignment device 42 is formed by fixing a disk 42b inside a pair of air cylinders 42a, and as shown in FIG.

It is provided in the packet 4 at the accumulation position Pa and the intermediate position pb.

In the transfer device 5, a four-strand chain 51 that fixes a pair of packets 4 in FIG. 3 engages with four drive sprockets (not shown) and a driven sprocket 53 in FIG. It has become.

This transfer device 5 has an intermittent drive system in which a drive motor (not shown) that rotates in forward and reverse directions is connected to the drive sprocket, and sends the chain 51 by a pitch P, and when the drive motor is not sending the chain 51, the drive motor rotates in small forward and reverse directions. Chain 5
1, the packet 4 is swung left and right.

Next, the operation will be explained.

First, the cam mounting W on the left! The air cylinder 23C of 123 contracts as shown in FIG. 4, and the cam base 23b moves to the right end along the rail 23a. On the other hand, the slide block 22 moves downstream in the flow direction B of the fibers f as the screw g21b rotates in the normal direction due to the normal rotation of the stepping motor 21a in FIG. During this movement, the cam roller 24c in FIG.
Move to the right against 4d. With this move,
The racks 24e and 24e move to the right while rotating the pinions 24f and 24f. The above pinion 24f
, 24f, the clamping members 29A, 29B rotate around the pinions 24f, 24f from the position indicated by the dashed line to the position indicated by the solid line, and as shown in FIG. 29Bb are in sliding contact with each other to grip the fiber f while applying pincer force to the fiber f. That is, one of the clamping machines 24 grips the fiber f near both sides of the cutting location at a first position P1 set upstream in the flow direction B of the fiber f in FIG. As a result, in the vicinity of the above,
The hollow portion of the fiber f is crushed and plastically deformed.

At the same time, the clamping plates 20 shown in FIG. 2 are closed to lightly clamp and support the fibers f.

The pincher 24 (see FIG. 4) of the left pull-in cutting device 2 that grips the fiber f moves to a second position P2 set on the skim side in the flow direction B of the fiber f in FIG. It moves, and this movement attracts the fiber f. During this movement, the pinching members 39A and 39B of the pull-in cutting device 3 on the right side in FIG. 4 return to the first position P1 in FIG. 4! Grasp 1f and pull it closer. In other words, the right-hand pinching plate 3.0 in FIG.
The fiber af is supported before the grip by the fiber af is released.

After the retraction cutting device 3 on the right side in FIG. 4 has pinched the fiber, the retraction cutting device 2 on the left side moves to the second position P2 (first
(see figure) before reaching the retraction cutting device 2 on the left side.
The heater cam 23d is connected to the cam roller 25c shown in FIG.
slides into contact with each other, and as shown in FIG. 5, the hot plate 27 advances to the right side and thermally cuts the fiber f to a set length in a horizontal state at the second position P2 in FIG. By this thermal cutting, the ends of the many fibers f are thermally welded to each other. Hot plate 2 in Figure 6 above
Immediately after 7 advances to the right side, the cam roller 26c in FIG. 2 moves against the sweeping cam 23f in FIG. 4, and the sweeping member 28 in FIG. Proximity to fibers. On the other hand, the hot plate 27 is attached to a coil spring (not shown) along the heater cam 23d in FIG.
The spring force causes it to retreat to the left in Figure 6. During this retreat,
The ta male which is thermally cut and attached to the hot plate 27 and moves to the left together with the hot plate 27 comes into contact with the U-shaped notch 28b of the cleaning member 28 and is wiped off.

After this, as the air cylinder 23c in FIG. 4 extends, the cam base 23b retreats to the left, and the rack 24e retreats to the left, the clamping members 29A, 29B and the clamping plate 20 in FIG. They are opened as shown in the dashed line in FIG. 4 and as shown in FIG. 2, respectively. As a result, the cut fiber #If shown in FIG. 1 is released from the support and falls into the primary reservoir 40 shown in FIG.
Its both end faces are tapped lightly to position it in its axial direction.

- On the other hand, the retraction cutting device 2 on the left side returns to a position slightly upstream from the first position P1 in FIG. 1 by the reverse rotation of the stepping motor 21a in FIG.
After the fiber f is pinched, the retraction cutting device 3 on the right side in FIG. 3 thermally cuts the fiber f at the second position P2 in FIG. In other words, the two retraction cutting devices 2.3 of FIG. 2 cut the fibers f alternately.

The fiber f positioned in the secondary reservoir 40 falls into the secondary reservoir 41 when the shutter 40a is opened, and is positioned in the axial direction again here, and the number of falls becomes m times. After that, the shutter 41a is opened and the accumulation position 1
It falls into packet 4 of 1 Pa. This packet 4
The falling inward is repeated a predetermined number of times n, resulting in a predetermined number of fibers f, in the case of this example, 30XmXn wood fibers f.
is accumulated. Further, the secondary storage device 41 receives the fibers f falling from the primary storage device 40 while the packet 4 is moving, and after the movement of the packet 4 is completed, the shutter 41a is opened and the next packet 4 Keep it all inside m! Let f fall.

The collected fiber bundles F are intermittently transported by a pitch P by a transport device 5 from an intermediate position Pb to a convergence position (not shown). At each stop position of the packet 4, the drive motor of the transfer device 5 rotates in small forward and reverse directions, and the packet 4 is slightly swung left and right, so that the fibers f are evenly stored in the packet 4 without being biased. be done. On the other hand, the bundle F is at the accumulation position Pa and the intermediate position pb.
The air cylinder 42a of the edge aligning device 42 shown in FIG.
expands and contracts in the axial direction of the bundle F, and the disk 42b taps both end faces Fa of the bundle F, thereby correcting the axial positional deviation that occurs during dropping and transport.

After that, one bundle F goes through the forming process and the taking out process G shown in FIG. 1, and is housed in a container for an artificial kidney (not shown). ,
The portion sandwiched by 29Bb is cut and removed.

In the configuration described in 1-, this invention cuts the fiber f to a set length while pulling the fiber f shown in FIG. Therefore, there is no risk of curling of the fiber af, and therefore, the amount of waste yarn can be reduced, improving the yield.

In addition, the Fa fibers are placed near the cutting point using the sandwiching machine 2 shown in Fig. 5.
4, the fibers at the cutting location are stably held and can be easily cut. Therefore, the workability of cutting is good and accurate cutting is possible.
A uniform fiber bundle F of FIG. 1 can be produced.

Further, since the continuous cutting machine for TA fibers of the present invention has a pair of retraction cutting devices 2 and 3 as shown in FIG. 3, it is possible to continuously cut the continuously flowing fibers f. Therefore, it has excellent manufacturability.

Also, since the cut tJ]lf is supported in a horizontal state by the sandwiching plate 20 in FIG. 2, the support is released and the 11M1 falls.
f is in order, that is, there is little risk of scattering,
- can be integrated into the next reservoir 40; Therefore, in this respect as well, manufacturability is good.

By the way, a single fiber if cut to the set length shown in Figure 1 is light even if it is dropped horizontally like this, so there is a problem that it will fall unstable due to the air resistance it receives while falling. It will be done. Here, in this embodiment, a large number of M&
Since the fibers f are pinched by the pinchers 24 shown in FIG. 5 near both sides of the cutting point, the pinched fibers mf are plastically deformed, interlock with each other, and become integrated at the pinched points. Therefore, since one lightweight fiber f falls in a state where it is integrated into many fibers, the posture at the time of the fall is stabilized. In particular, the heating plate 27
When the a fibers f are thermally cut, the ends of each knit mf are welded to each other, making the fall more stable.

In addition, as mentioned above, since the fiber mf is pinched near the cutting point and plastically deformed, the openings at both ends are closed.
There is no risk of foreign matter getting inside. Therefore, for example, when used as an element of an artificial kidney, not only can a high-quality product be supplied, but also the adhesive d applied to both end faces Fa in FIG. There is no risk that the adhesive fixed to the container will accidentally enter the hollow part of the fiber f.

Further, the manufacturing apparatus according to this embodiment oscillates the packet 4 shown in FIG. 2 to evenly store tamf without being biased in the packet 4, thereby facilitating the subsequent focusing process.

In addition, in the manufacturing apparatus shown in this embodiment, when changing the cutting length of the fiber f, the forward and reverse rotation timing of the stepping motors 21a and 31a shown in FIG. An adjustment mechanism for adjusting the axial position of the alignment device R42 may be provided.

[Effects of the Invention] As explained above, according to the present invention, the yield can be improved and fibers can be cut accurately. Further, since the fibers can be continuously cut and there is no fear that the cut fibers will be scattered, productivity is good.

[Brief explanation of the drawing]

Fig. 1 is a schematic process diagram of the entire fiber bundle manufacturing method according to the present invention, Fig. 2 is a front view showing a part of the entire taM1 bundle manufacturing apparatus, Fig. 3 is a plan view of the same, and Fig. 4 is a continuous flow diagram. A longitudinal cross-sectional view of the cutting machine, FIG. 5 is a perspective view showing the positional relationship between the spacing machine, the hot plate, and the removing member, FIG. 6 is a perspective view showing the heating plate and the removing member, and FIGS. 7 and 8. shows the conventional H&fiber manufacturing method,
FIG. 7 is a plan view of a fully wound annular fiber bundle, and FIG. 8 is a plan view of the fiber bundle. 2.3... Retractable cutting device, 20.30... Support device (snipping plate), 24.34... Sandwiching machine, 25.35.
...Cutter, B...flow direction (arrow), f...fiber, Pl...first position, P2...second position. Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) A continuous fiber cutting machine comprising a pair of retraction cutting devices that alternately cut the fibers by reciprocating in the flow direction of the continuously flowing fibers, the retraction cutting device cutting the fibers. a pincher that pinches and grips the vicinity of the location at a first position in the flow direction and draws the fibers in the flow direction; After that, a cutter that cuts the fiber to a set length in a horizontal state, a cutter and a cutter are provided on the downstream side of the flow direction than the cutter, and the gripping by the cutter of the other pull-in cutting device is released. before being
Continuous cutting of fibers, comprising a support device that supports the fibers to be cut horizontally to prevent the fibers from hanging down, and releases the support to allow the cut fibers to fall to a predetermined position. Machine. (2) The continuous cutting machine according to claim 1, wherein the pinching machine pinches the vicinity of both sides of the cutting location.