JPS6158569B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for cutting these continuous fibers into staple fibers of a predetermined length and simultaneously crimping the staple fibers during the production process of synthetic and recycled staple fibers. Continuous fibers were supplied and stacked on the inner circumference of a rotor with cutting blades facing inward on the outer circumference side, and the fibers on the cutting blade side were cut by a presser roller to form between the blades. In a device that is pushed into a crimping chamber and taken out from the outer peripheral side, the crimping chamber is configured in a specific relationship.

Staples are generally produced by stretching spun undrawn continuous fibers in a drawing step, crimping them using a crimping device, and then cutting them into predetermined lengths. Generally, a crimper box is often used as a crimping device, in which a push roller pushes the continuous fiber into a narrow chamber and takes out the crimped continuous fiber from the other side. Furthermore, there are various types of cutting devices, but in order to cut the crimped fibers to approximately a predetermined length, the crimped fibers have to be stretched again, which is not preferable.

In recent years, there has been a remarkable development in technology related to spinning and drawing, as well as technology related to these processes, and the speed and size of staples have increased.In terms of staple production, crimping and cutting devices that can cope with these speed increases have been developed. In the direct spinning and drawing method, the spinning speed reaches 3,000 to 5,000 m/min, and when using the above-mentioned crimper box at such a speed, the frictional heat of the fibers is reduced. The reality is that a crimper box cannot be used because of the occurrence and fusion of crimper boxes, which requires a special cooling device, and which also causes many problems in terms of maintenance and management. Other crimping devices have been proposed, but none have been fully satisfactory due to uneven crimping and maintenance problems.

On the other hand, various methods and means have been developed and proposed as continuous fiber cutting devices, but there are few that can satisfy the spinning speed of the direct spinning and drawing method. Recently, a new method and device for cutting continuous fibers has been developed, in which a large number of cutting blades are arranged radially around a rotating drum, the continuous fibers are wound around the outer periphery of the drum, and a pressing roller is arranged on the outer periphery of the cutting blades. Then, cut the inner circumferential side of the wound fiber, forcefully push it into the root side of the cutting blade and take it out from the opening at the bottom, or conversely, turn the cutting blade inward and press the presser roller internally. and supply and laminate continuous fibers.
Some staples have been proposed that cut the outer circumferential side, and the cut staple is inevitably compressed and crimped in the length direction as it passes through the root of the cutting blade. However, the proposed technique is exclusively for cutting continuous fibers, and does not actively apply crimp to cut staples.

The present invention uses such a cutting device to cut continuous fibers at high speed, and is configured to actively crimp the cut staples. The crimping chamber is formed to satisfy a special relationship to apply crimps. However, in the present invention, a large number of cutting blades are arranged radially at approximately equal pitches in the axial direction with a specific width along the outer circumferential side of the roller, and the rotor is The opposed intermediate portions of the cutting blades are formed in a crimping chamber, a press roller is arranged with a slight gap on the inner periphery of the cutting blade of the rotor, and the continuous fibers are laminated on the inner periphery of the cutting blade. Among the fibers filling the small gap, the fibers on the cutting blade side are sequentially cut and filled into the crimping chamber formed between the cutting blades, and the crimping chamber is filled from the opening on the outer circumference side. The crimped fibers are taken out, and the relationship between the fiber passing length distance L at the tip of the cutting blade and the shortest fiber passing length distance b in the crimping chamber is
It is constructed so that L/b≧1.2.

The apparatus according to the present invention will be described in detail below based on the drawings, but the drawings show one example of a specific implementation, and the present invention is not limited to these illustrated examples, but in accordance with the spirit of the above and later descriptions. Therefore, even if the shape of the parts is changed or a part of the design is changed, the same implementation is possible. FIG. 1 is a side view of a cutting and crimping device according to the present invention, with main parts cut away. Figure 2 is a plan view of Figure 1, Figure 3 is a partially cutaway side view showing only the rotor shown in Figure 1, Figure 4 is a partially enlarged explanatory view of Figure 3, and Figure 5. 6 is a schematic explanatory view showing the cutting blade arrangement of the rotor, FIG. 6 is a partially enlarged explanatory view of FIG. 5, and FIG. 7 is a view equivalent to FIG. 6 showing another embodiment of the present invention. In these figures, the cutting and crimping device 1 according to the present invention is formed with a rotor 4 protruding from a drive unit 3 configured on a pedestal 2, and the rotor 4 includes:
A frame 3a whose fixed support shaft constitutes the drive unit 3
It is freely supported by a bearing 5 provided on the top of the pedestal 2 and a bearing 5a fixed on the pedestal 2, and a pulley 6 is fixed approximately in the center thereof, and is driven by a belt from a motor 7 and rotates in the direction of the arrow. do. On the other hand, a guard 8 is attached around the rotor 4, and the guard 8 is supported by a stay 9 and a torii-shaped bracket 10 erected on the pedestal 2.
An opening 8a is formed on the bracket 10 side. Further, an opening 8b is formed on the upper surface of the guard 8. The rotor 4 has a rotor main body 4a and an inclined surface 18 formed on the outer peripheral side of the rotor main body 4a, and a large number of cutting blade attachment members 15 are arranged on the inclined surface 18 at approximately equal pitches. 15 to rotor body 4
It can be formed integrally with a, or it can be formed separately and fixed. Reference numeral 4b denotes a ring body corresponding to the inclined surface 18 and provided to sandwich the cutting blade attachment member 15. If necessary, the cutting blade attachment member 15 can be integrally molded with the ring body 4b. Further, the cutting blade 16 provided on the cutting blade attachment member 15 needs to be replaced due to wear and tear, and it is recommended that the cutting blade 16 be removable. As such a cutting blade 16,
Preferably, the cutting blade 16 is inserted into the cutting blade mounting member 15 through a through hole provided in a corresponding portion of the ring body 4b, and these replacement blade through holes are closed by the contact plate 4c. . Note that it is desirable that the through hole also form a fitting recess on the corresponding surface side of the rotor main body 4a to stably hold the rotor. The cutting blade attachment member 15 has adjacent corresponding surfaces 15a,
The crimping chambers 15a are inclined at the same angle so as to narrow the distance from each other to form opposing sides of one side (fiber length direction) of the crimping chamber 20 for the cut fibers. The other side (fiber bundling direction) of the crimping chamber 20 is formed by the facing surfaces 18, 18 of the rotor main body 4a and the ring body 4b, and the crimping chamber 20 is formed by the facing surfaces 18, 18 of the rotor body 4a and the ring body 4b.
A and 18 are each formed into a narrow shape. A narrow opening 19 is formed on the outer peripheral surface of the rotor 4. Incidentally, since the inclined surfaces 18, 18 compress the cut fibers in the direction of bundling them as described above,
There is little relation to direct wave crimp, and the crimp providing chamber 20 may be formed only by the inclined surfaces 15a, 15a of the cutting blade attachment member 15, and the surfaces 18, 18 may be parallel. The crimping chamber 20 can be provided at an appropriate inclination angle with respect to the rotor, but the illustrated example shows an inclination angle of 30 degrees. It is recommended that

On the other hand, a presser roller 12 is disposed inside the rotor 4 configured in this manner in correspondence with the cutting blade 16.
The arrangement is preferably on the opening 8b side of the guard 8. Further, the presser roller 12 is provided so as to be able to adjust its movement with respect to the cutting blade 16, and as a means for this, a protrusion 10a is formed on a part of the upper beam of the torii-shaped bracket 10, so that the presser roller 12 can be moved freely. Supporting bearings 11 and 11a are provided to be slidable, and a handle 13 is used to move the presser roller 12 closer to or away from the cutting blade 16. In the present invention, a slight gap 14 is maintained between the cutting blade 16 and the presser roller 12, and the presser roller 12 is kept away from the cutting blade 16 only at the start of operation, and is maintained at a constant position after the start of cutting. Therefore, there is a small gap (2 to 4
mm) for positioning.
Further, the width of the presser roller 12 is set to fit into a gap (the thickness of the cutting blade attachment member 15) formed between the rotor body 4a and the ring body 4b of the rotor 4. 17 in FIGS. 1 and 5 is a toe guide.

The cutting and crimping device constructed in this manner is operated as follows. First, press the presser roller 12 with the cutting blade 1
When the rotor 4 is rotated and the tow (continuous filament) T is supplied to the inside of the rotor as shown in FIG. (on the sharp end side). Next, when the presser roller 12 is moved toward the cutting blade 16 so as to maintain a predetermined gap, the gap 1
The fibers filling the inside of the crimping chamber 4 and pressurized by the pressing roller 12 are cut by the cutting blade 16, and the cut fibers sequentially enter the crimp chamber 20. This cutting is done in proportion to the amount of tow T supplied.

By the way, the cut fibers are pushed into the crimping chamber 20 by the action of the presser roller 12, but the centrifugal force acts even further to push them into the crimp chamber 20. The length of the cut fiber is cut by the length of the fiber across the cutting blades 16 and 16, and the length L between the cutting blades 16 shown in FIG. 6 varies depending on a few factors. disconnected. The cut fibers S are then pushed into the crimping chamber 20 formed as described above, and are gradually crimped by the narrowed inclined surfaces 15a, 15a until they reach the opening 19. becomes a crimped fiber as shown by Sa. Further, the number of crimps applied when the fiber is discharged from the opening 19 is approximately determined by the ratio L/b of the shortest fiber passing length b in the crimping chamber 20 and the cutting length L. In the crimping chamber 20 shown in FIGS. 1 to 6, the shortest fiber passage length b is formed at the outermost circumferential side, but these b are formed in the middle of the crimping chamber 20. Even if it is provided, the same implementation is possible. When L and b are set in this way, the configuration of the crimping chamber 20 needs to satisfy L≧1.2b. In the range of L<1.2b, crimp is slightly applied, but it is insufficient, and the crimp application chamber 20
It is released by centrifugal force without sufficient filling pressure inside. Therefore, in the present invention, L≧
1.2b.

Incidentally, the inclined surfaces 15a, 15a forming the wall surface of the crimping chamber 20 do not necessarily have to be flat, and may be formed in a wave shape, or a widened portion may be provided in the middle of the slopes 15a, 15a for temporary It is also possible to configure the filling pressure of the cut fibers to be loosened and pressurized again. FIG. 7 shows a typical example of these, in which the sloped surfaces 15a, 15a are rapidly constricted, and the passage through the constricted portion is crimped by the pressing force of the presser roller 12, thereby forming a pocket. Parts 15b, 15b
The compression is temporarily loosened by
c, 15c can also exhibit re-crimping. Note that in order to change the shape of these crimping chambers 20, the cutting blade attachment member 15 except the cutting blade 16
It is also possible to change the degree of constriction and the shape of the inclined surface by using an auxiliary molding material such as that covered with the auxiliary molding material.

Since the cutting and crimping device according to the present invention is configured in this way, it is possible to cut continuous fibers and apply crimps at the same time, and moreover, the centrifugal force and the friction of the cut fibers in the crimping chamber 20 are balanced. Therefore, sufficient filling pressure can be maintained and uniform crimp can be generated. Furthermore, as the rotor rotates, continuous fibers are laminated on the inner surface and cut by pressing them with a presser roller, making it possible to process fibers that are spun at high speed, and to create crimped staples through an integrated continuous process. can be produced.

[Brief explanation of the drawing]

FIG. 1 is a side view of a cutting and crimping device using the present invention, with main parts cut away. Fig. 2 is a plan view of Fig. 1, Fig. 3 is a partially cutaway side view showing the rotor of Fig. 1, Fig. 4 is an explanatory sectional view enlarging a part of Fig. FIG. 6 is a partially enlarged explanatory diagram of FIG. 5, and FIG. 7 is a diagram corresponding to FIG. 6 showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Cutting and crimping device, 2... Pedestal, 3... Drive section, 4... Rotor, 10... Bracket, 12...
... Pressing roller, 14 ... Gap, 15 ... Cutting blade mounting member, 16 ... Cutting blade, 18 ... Inclined surface, 19
...Opening, 20...Crimping chamber.

Claims (1)

[Claims] 1 A device that cuts continuous fibers and crimps the cut fibers at the same time.A large number of cutting blades with a constant blade width are installed on the outer periphery of a rotating rotor.
The blade portions are oriented in the rotational axis direction of the rotor, and the blade widths are arranged at approximately equal pitches along the rotational axis direction of the rotor, and the rotor has a crimped intermediate portion where the cutting blades are opposed to each other. A press roller is formed in a chamber, and a press roller is disposed with a slight gap from the cutting blade part of the rotor, and continuous fibers are stacked and supplied to the inner peripheral side of the cutting blade tip circle to fill the gap between the press roller and the press roller. The fibers on the cutting blade side of the fibers are cut by the press roller and the cutting blade, the cut fibers are filled in the crimping chamber, and the crimped fibers are released from the opening formed on the outer circumference of the chamber. Fiber passing length L at the tip of the cutting blade taken out and shortest fiber passing length b in the crimping chamber
A device for cutting and crimping continuous fibers, characterized in that it is configured such that the relationship L/b≧1.2.