JPS6152267B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for converting continuous fibers into straight fibers of constant length, in particular into bundles thereof.

<Prior art> Conventionally, fiber bundles such as synthetic membranes, hollow fiber reverse osmosis membranes, hollow fiber artificial kidneys, brushes, brushes, etc. are made by forming thin bundles (continuous fibers) of continuous monofilaments or multifilaments into a certain length. It is made by cutting into pieces. Specifically, for example, continuous fibers that are continuously produced are spooled onto a reel or the like to form a thick annular fiber bundle, which is then cut into appropriate lengths.

<Problems to be Solved by the Invention> However, the conventional method not only has poor productivity, but also has the problem that the fiber bundles cut to a certain length are bent. If a curved part is cut or removed, resources will be lost by the amount removed.

Therefore, the inventors of the present invention have conducted extensive studies with the aim of producing straight fibers, particularly fiber bundles, of a certain length from continuous fibers with high productivity, and have discovered that the following method may be adopted. .

<Means and effects for solving the problem> In a method for converting continuous fibers into straight fibers of a constant length, a gripping piece having a pair of clamping pieces that can be opened and closed has a constant length that allows a cutting blade to intervene. Two gripping pieces are arranged in parallel in the traveling direction at intervals, and three or more sets of the two juxtaposed gripping pieces are provided at intervals corresponding to the cutting length of the fibers on the trajectory of the endless chain, and A mechanism for opening and closing the clamping pieces of the gripping piece is provided near the foil on the side that pulls out the supported fibers, and a cutting blade that intervenes at a constant interval between the two juxtaposed gripping pieces and the two juxtaposed gripping pieces are provided. 1 gripping piece and 2 other juxtaposed
(a) Using a device provided with a gripping piece for lowering the cut fiber between the gripping pieces of The fibers were opened by a mechanism for opening and closing the two clamping pieces, and the two clamping pieces straddled the continuous fibers drawn from the storage source, and then the mechanism for opening and closing the clamping pieces was released, so that the fibers were arranged side by side. Grip the fiber with two gripping pieces B and C,
(b) When the distance between the two juxtaposed gripping pieces B and C reaches the position of the cutting blade, the fiber is pulled out in the horizontal direction by moving along the trajectory of the endless chain. stop and operate the cutting blade to cut the fibers to a certain length.
(c) The fiber is first gripped and moved along the trajectory of the endless chain, and the fiber is pulled out for a certain length L. Near gripping piece A and around gripping piece B, a certain length L′ is cut. (d) After releasing the grip of the fibers from the gripping pieces A and B, the gripping pieces 7 and 8 are lowered, and the gripping pieces 7 After releasing the grip on the fibers 7 and 8 and placing them in a fixed position, the grip pieces 7 and 8 are raised to a position where they do not interfere with the movement of grip pieces B and C, and (e) the grip pieces are With piece C gripping the fiber, gripping pieces B and C are moved, and just before the fiber reaches a certain length L, the two succeeding gripping pieces B' and C' arranged in parallel grip the fiber again. , a method for converting continuous fibers into straight fibers of a constant length, characterized by repeating the operations (a) to (e) in sequence. Specifically, the method of the present invention will be explained with reference to the drawings. Figure 1-A, Figure 1-B
The figure is a side view of the main parts of the device used in implementing the method of the present invention, FIG. 2 is a sectional view of FIG. 1-A, and FIG. 3-A is an enlarged front view of the gripping piece. , FIG. 3-B is a side view of the same, and FIG. 3-C is a plan view of the same.

FIG. 4 is an explanatory view showing an example of a method of cutting fibers, and is a cross-sectional view in FIG. 1-A.

FIG. 5 is a sectional view of FIG. 1-B.

In the present invention, continuous fibers refer to monofilaments derived from recycled, semi-synthetic, or synthetic polymers.
The targets are multifilaments with various cross-sectional structures such as circular, non-circular, and hollow.

The storage source for the fibers may be the process itself in which the fibers are continuously produced, a bobbin in which the fibers are wound, a can in which the fibers are fed, or the like.

Gripping pieces A, B, etc. of fiber ends in the present invention,
C is a type of mechanical element that grips the fibers. Therefore, an element for moving and actuating the gripping piece is connected to the gripping piece. Figures 1-A and 1-B show their typical relationships.

The gripping piece A is provided in the middle of the endless chain 3 mounted on the two foils 1 and 2 (see Figures 1-A and 2).
(See figure) When the foils 1 and/or 2 rotate, the gripping piece A moves. The gripping piece A has foils 1 and 2 and an endless chain 3 designed so that the distance it can move in the horizontal direction is long.

Other gripping pieces Z are arranged side by side on the endless chain 3 at regular intervals. The size of the interval is such that it is possible to cut the fibers with a cutting blade, which will be described later.

The endless chain 3 has the two juxtaposed gripping pieces A.
Two other parallel gripping pieces B and C are provided before and after a point a certain distance L' away from the midpoint between and Z.

Similarly, two other juxtaposed gripping pieces B' and C' are provided at a certain distance L' from the juxtaposed gripping pieces B and C. In order to continuously move the fibers, three or more sets of two juxtaposed gripping pieces are provided.

The operation of the invention is carried out as follows. The ends of the continuous fibers F from the storage source 4 are gripped by the gripping piece A. When gripping, gripping piece A is first-A.
Have them do this when they move below the foil 2 in the figure.

In the device shown in FIG. 1-A, the gripping pieces A, B, C, B', C'...Z, etc. are the same (different symbols are given for explanation). The gripping piece A (C) (the same applies to B described later) is the third
- As shown in Figures A to C, an endless chain is mounted, but the gripping piece A is actually two clamping pieces A, for example.
Consisting of A ₂ and these supporting shafts A ₃ , the clamping piece
One end of A ₁ and A ₂ is supported by a common support shaft A ₃ , and the other end can be opened and closed. The opening/closing operation is performed, for example, by the vertical movement of a pin _A5 inserted into a groove in the end _{A'1 of} one of the clamping pieces A1 on the _side of the support shaft A3. The pin _A5 is connected to a rod _A6 that slides inside one of the clamping pieces _A2 , and _a guide roller _A4 is attached to the head of the rod _A6 . The opening/closing operation of the clamping piece _A1 is performed by pushing and pulling.

It is efficient to grip the fiber F by the gripping piece A continuously while running the fiber F, and the mechanism is as follows, for example (Part 1-
(See Figure A).

A fixed cam 11 is set in the front part of the foil 2, and when the gripping piece A rotates on the orbit of the endless chain 3 and reaches point a of the foil 11, the guide roller _A4 is pushed by the fixed cam 11, The piece _A2 is opened to a position where the fiber F can be introduced. Next, below the foil 2, the gripping pieces A ₁ and A ₂ straddle the running fiber F, and at point b, the guide roller A ₄ is released from the fixed cam 11, and the gripping piece A completely holds the fiber F. Put it in.

Continuously, the gripping piece A holds the fiber F in the first
It is pulled out to a position a certain length L from the end shown in Figure A, and then the rotation of the foils 1, 2 and the endless chain 3 is stopped, and the pulling out of the fiber F is stopped.

When the rotation of the endless chain 3 stops, from the end of the fiber
Since there are two gripping pieces B and C arranged in parallel at a certain distance before and after the position L', the gripping pieces B and C are operated to hold the fibers pulled out halfway. Grip in several places. If the fibers are to be gripped while the endless chain 3 continues to rotate, the fibers are stopped being pulled out after the gripping pieces B and C have gripped them.

After stopping the drawing of the fibers, the fibers are cut between the gripping pieces B and C. Cutting is performed by intervening the cutting blade 5 between the gripping pieces B and C. An example of a method for intervening the cutting blade 5 is the method shown in FIG. That is, there is a method in which the fibers are cut by making the cutting blade 5 protrude from the direction of the rotation axis (not shown) of the foils 1 and 2. As a means for protruding the cutting blade 5, for example, there is a means of using an air cylinder 6.

The types of cutting blades themselves include rotary knife types, and types that melt fibers with heat.

Next, the fibers cut to a certain length L' are released from the gripping pieces A and B, and the gripping pieces 7 and 8 are moved up and down.
It can also be used as a grip. That is, as shown in Figure 1-B, grip pieces D and E are located between grip pieces A and B and closer to grip pieces A and B.
are provided, and the gripping pieces D and E move in the vertical direction, and in the process of moving downward, the gripping pieces D and E grasp the fiber F.
Immediately after, the cut fibers are released from the grips of the gripping pieces A and B and the fibers are replaced. Replacement must be done to an extent that does not cause the cut fibers to fall by themselves. Therefore, the cut fibers are temporarily held by the four gripping pieces. As shown in FIG. 1-B and FIG. 5, the gripping pieces D and E are positioned at such a position that they do not interfere with the movement of the endless chain 3, and are configured to move when performing a gripping action. Any means can be used to enable movement of the gripping pieces D, E, and for example, air cylinders 7, 8 may also be used.

Further, the opening operation of the clamping pieces of the gripping pieces A and B is performed by any method such as using the movement operation of the gripping pieces D and E.

The two gripping pieces D and E holding the cut fibers F' descend as they are and enter the tray 9 provided below them, release their grip on the cut fibers F', and release the cut fibers into the tray 9. F', and then raised to a standby position where the gripping pieces A, B, C, B', C', etc. do not interfere with movement, and then stopped.
In the tray 9, the cut fibers F' are accumulated in substantially parallel bundles. Therefore, it is preferable that the cross section of the tray 9 be curved in a substantially U-shape as shown in FIG. 5 in order to obtain a more focused fiber bundle. Preferably, in order to uniformly stack the fiber bundles on the U-shaped tray, the relative positions of the gripping pieces D, E and the tray are periodically changed.

The trays 9 are provided, for example, on a conveyor 10, and when one tray 9 is appropriately filled with cut fibers F', the other tray 9' is positioned below the gripping pieces D and E, so that the cut fibers are absorbed into the tray. They will form in bundles on top.

By employing the operations of the present invention as described above, it becomes possible to continuously produce short fiber bundles of thicker bundles from continuous fibers.

In addition, when the storage source is a process for continuously producing fibers, an element combining a large number of dancer rolls, for example, is introduced between the storage source and the foil 2 to collect the continuously produced fibers. foil 1,2
It is possible to move batchwise.

<Effects of the invention> The method of the present invention exhibits the following effects.

It makes it possible to process long continuous fibers into thicker fiber bundles.

When using gripping pieces D, E, it is possible to form bundles of fibers, particularly parallel ones.

It is possible to produce a fiber bundle with less bends and with less waste than when fiber bundles are obtained using the conventional skein winding method. This method is suitable for complete mechanization.

The method of the present invention can produce straight fiber bundles of a broadly constant length.
It can be used in the field of manufacturing from continuously produced storage sources.

Such fields include synthetic membranes, hollow fiber reverse osmosis membranes, hollow fiber artificial kidneys, brushes, brushes, and the like.

[Brief explanation of the drawing]

FIGS. 1-A and 1-B are side views of the main parts of the apparatus used in carrying out the present invention. Second
The figure is a sectional view of Figure 1-A, Figure 3-A is an enlarged front view of the gripping piece, Figure 3-B is an enlarged side view of the gripping piece, and Figure 3-C is a plan view of the same. . Fourth
The figure is a sectional view of FIG. 1-A. FIG. 5 is a side view taken in the direction of arrows in FIG. 1-B. A, B, C, D, E, Z...Gripping piece, F...Fiber,
1, 2...Foil, 3...Endless chain, 4...Storage source, 5...
Cutting blade, 6, 7, 8...air cylinder, 9...saucer.

Claims (1)

[Claims] 1. In a method for converting continuous fibers into straight fibers of a certain length, a gripping piece having a pair of openable and closable clamping pieces moves the cutting blade in the advancing direction at certain intervals that allow intervention. Two gripping pieces are arranged in parallel, and three or more sets of the two juxtaposed gripping pieces are provided on the trajectory of the endless chain at intervals corresponding to the cutting length of the fibers, and are used to pull out the fibers that support the trajectory of the endless chain. A mechanism for opening and closing the clamping pieces of the gripping piece is provided near the side foil, and a cutting blade that intervenes at a constant interval between the two juxtaposed gripping pieces and the two juxtaposed gripping pieces are provided. Using a device that is provided with a gripping piece that lowers the cut fiber between it and another two juxtaposed gripping pieces, (a) pinching the two juxtaposed gripping pieces B and C; A mechanism in which the piece is opened by a mechanism that opens and closes a clamping piece provided near the foil, the two clamping pieces straddle the continuous fiber drawn from the storage source, and then the mechanism opens and closes the clamping piece. (2) Grasp the fiber with the two juxtaposed gripping pieces B and C, move along the trajectory of the endless chain, and pull out the fiber in the horizontal direction; (b) The two juxtaposed gripping pieces When the distance between the gripping pieces B and C reaches the position of the cutting blade, the endless trajectory is stopped, and the cutting blade is activated to cut the fiber into a certain length.
(c) The fiber is first gripped and moved along the trajectory of the endless chain, and the fiber is pulled out for a certain length L. Near gripping piece A and around gripping piece B, a certain length L′ is cut. The cut fibers are gripped by the gripping pieces 7 and 8 that move up and down. After releasing the grip on the fiber No. 8 and placing it in a fixed position, the grip pieces 7 and 8 are raised to a position where they do not obstruct the movement of the grip pieces B and C, and (e) the grip pieces 7 and 8 are moved by the trajectory of the endless chain. C
While gripping the fiber, the gripping pieces B and C are moved, and just before the fiber reaches a certain length L, the following two parallel gripping pieces B' and C' grip the fiber again. A method for converting continuous fibers into straight fibers of a constant length, characterized by sequentially repeating operations (a) to (e).