JPS6025373B2 - Strand threading method and device in glass fiber strand cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for directly cutting a spun glass fiber strand into chopped strands, and more particularly to a method and apparatus for winding or threading the strand around a cutting device.

Conventionally, methods and devices for directly cutting glass fiber strands drawn out from a paper yarn furnace have been known, and are disclosed in Japanese Patent Publication No. 50-2708. In the apparatus disclosed in this publication, a large number of glass filaments spun from a nozzle at the bottom of the paper yarn furnace are coated with a coating agent and then collected to form a strand, which is then formed into a single strand. The strand is wound around the feed roller circumferential surface at a predetermined angle, and the strand is given a predetermined take-up speed by the frictional adhesive force between the feed roller and the strand, and the desired drawn fiberization is performed. The strand is cut into chopped strands of a certain length by a cutter loaf that presses against the surface. Generally, under steady operating conditions, the peripheral speed of the feed roller is 800 to 3000/min. By the way, at the beginning of the cutting operation, the operation of applying the glass filament from the spinning furnace to the feed roller rotating at high speed as described above is extremely dangerous, requires a high degree of skill, and is virtually impossible.

Conventionally, the speed of the feed roller is lowered, and a strand made of thick filaments (called fiberized filaments) flowing out from the nozzle of the spinning furnace is wound around the tip of the feed roller. While accelerating the feed roller, and after reaching a predetermined speed (hereinafter referred to as fiberization speed) necessary to obtain a predetermined fineness and strand, the strand is transferred to the cutting section of the feed roller and the cutting operation is started. In this method, the unfiberized filament wrapped around the tip of the feed roller before the start of the cutting operation remains as it is during the cutting operation, so it gradually unravels, scatters and falls in the form of fluff, and mixes into the chopped strands. The disadvantage is that it impairs the quality of the product. In addition, since the unfiberized filament is quite thick and rigid, it is not completely wrapped around the circumferential surface of the feed roller, and its ends are separated from the circumferential surface of the feed roller and are swung around in a large arc, which is very dangerous. One way to avoid this is to wind the strand around the feed roller and then rapidly increase the speed of the feed roller to minimize the length of the unfiberized filament that remains wrapped around the feed roller. However, this method has disadvantages in that the strands are subject to sudden tension and are likely to break, and the feed rollers are susceptible to friction. Furthermore, as an alternative method, the unfiberized filament is wrapped around the cutting part of the feed roller from the beginning, and while being cut by the cutter roller, the circumferential speed of the feed roller is gradually increased to the fiberization speed, and the filament is completely fiberized before being cut. A method has been implemented in which only the chopped strands are taken out as a product. In this method, in order to cut the unfibered filament, which is considerably thicker and more rigid than normal filament, it is necessary to considerably increase the pressing force of the cutter roller against the feed roller, which causes a gap between the cutter blades. This causes blade jamming, which interferes with normal filament cutting operations, and also greatly accelerates damage to the cutter blade and feed roller. Furthermore, as a result of wrapping a thick unfiberized filament under great tension on the cutting section surface of the feed roller formed of an elastic material, a large dent is created on the surface of the feed roller, which causes miscuts after normal cutting operations have begun. Particularly when such work is performed by unskilled workers, they often make a mistake in feeding the filament containing uncooled glass into the feed roller, resulting in burnout of the feed roller, breakage of the cutter blade, etc. There is. Particularly in the latter case, the broken blade may fly off as the cutter roller rotates at high speed, which is dangerous. Recently, in order to increase the productivity of chopped strands using the above-mentioned direct spinning and cutting method, multiple paper yarn furnaces have been arranged in parallel, and multiple strands formed from glass filaments flowing out from each spinning furnace are processed in parallel. A method of wrapping and cutting a single feed loaf was proposed.

However, in this method for producing chopped strands using a multi-furnace multi-filament system, in addition to the problem at the start of cutting, there is a problem that one of the multiple strands between each paper yarn furnace and the feed roller may cause some problems. Another problem is that when the wire is broken, it is extremely troublesome to re-wrap it around the feed roller. That is, as mentioned above, since the feed loaf rotates at a high speed of about 800 to 3000 m/min, once the strand is broken, it can be processed without stopping the stretching and cutting of other strands.
Rewinding the feed roller is virtually impossible, so the speed of the feed roller is reduced to a safe degree or stopped altogether in order to rewind the broken strand. As a result, production efficiency is sacrificed. A method and apparatus that eliminate the drawbacks of the prior art described above are disclosed in Japanese Unexamined Patent Publication No. 54-38-6.

What is disclosed in this publication is that an auxiliary feed roller that is driven separately from the feed roller is coaxially arranged adjacent to one end of the feed roller, and an auxiliary cutter roller that rotates under pressure on the circumferential surface of the auxiliary feed roller. established,
If one of the multiple strands fed to the feed roller breaks for some reason during the production of chopped strands, continue cutting the other strands while keeping the feed roller rotating at high speed, and use the auxiliary feed roller to continue cutting the other strands. The end of the fiberized strand is wound around the auxiliary feed roller while the strand is almost stationary or rotated at a low speed of 30 to 50 m/min, and then the speed of the auxiliary feed roller is gradually increased to the rotational speed of the main feed loaf at 800 to 50 m/min. 3000m/
The broken strands are transferred to the main feed rollers after the broken strands have become completely fiberized. However, this method does not transfer the strand from the auxiliary feed roller to the main feed roller, and in extremely rare cases, the strand may not wrap around the main feed roller.
Disadvantages include the fact that the strands may wrap around the shaft between the feed rollers, or that they pass through parts of the feed rollers that do not contact the cutter blade, resulting in long strands that get mixed into the chopped strands and require sorting later. There is,
It wasn't necessarily satisfying. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to remedy the shortcomings of conventional techniques as described above and to provide a novel method and apparatus for winding glass fiber strands onto feed rollers.

According to the first invention of the present application, a strand formed by concentrating a large number of glass filaments spun from the bottom of a spinning furnace is applied to the peripheral surface of a feed roller to provide a desired take-up device to the strand by frictional adhesive force. In a method in which the strand is brought into contact over a sufficient angle and then cut into chopped strands by a cutter roller rotating in pressure contact with the feed roller, the strand to be brought into contact with the field surface of the feed roller is first provided near the feed roller. Wrap it around the rotated collet,
While winding on the collet, the winding speed of the collet is
The feed roller is at or above a steady speed, and then the collet is moved to a steady speed over a range of angles such that the feed roller can pick up the strand running toward the collet by frictional adhesion. There is provided a method for threading a glass fiber strand, characterized in that the glass fiber strand is brought into contact with the feed roller rotating at a speed.

According to the second invention of the present application, the strand formed by concentrating a large number of glass filaments spun from the bottom of the yarn furnace is brought into contact with the peripheral surface over a predetermined angular range in order to be taken at a predetermined take-up speed. A cutting device having a feed roller disposed on the feed roller and a cutter roller rotating in pressure contact with the feed roller, the main guide loaf being disposed on the side of the feed roller and regulating the winding position of the strand wound around the feed roller. an auxiliary guide roller that is arranged close to the main guide roller and can rotate independently of the main guide roller; a collet that winds up the strand that has passed through the main guide roller and the auxiliary guide roller; It comprises a variable speed drive device that rotates and drives the collet, and a support device that supports the collet and the variable speed drive device, and the support device supports the collet.
The strand between the collet and the main guide roller is held movably between a first position in which it does not contact the feed roller and a second position in which it contacts the circumferential surface of the feed roller over a predetermined angle. A glass fiber strand threading device is provided.

Furthermore, the third invention of the present application provides the above-mentioned threading device,
a moving guide that engages the strand between the collet located at the second position and the feed roller to increase a wrapping angle of the strand around the feed roller; and a moving guide that cuts the strand between the moving guide and the collet. The present invention is characterized in that it is provided with a thread guiding mechanism having scissors that

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the accompanying drawings.

Referring to FIG. 1, the bushing at the bottom of the paper yarn furnace has a large number of nozzle holes (for example, 400 to 2,000) and discharges a large number of glass filaments 2.

The filament 2 is coated with a coating material including a lubricant etc. by a coating device 3, and further gathered into one strand 5a by a gathering roller 4. Similarly, another spinning furnace (not shown)
Strands 5b and 5c are formed by this. These strands 5a, 5b, 5c are supplied to a cutting device 7 through a guide shoe 6 having a groove corresponding to each strand. The cutting device 7 has a guide roller assembly 8, a feed roller 9, and a cutter roller 10. The strand is in contact with the circumferential surface of the feed roller 9 and is formed at a predetermined angle 8.
After being rotated, it is cut by a cutter loaf 10 into chopped strands 11 of a certain length, which fall onto a conveyor 2 and are carried out as a product. Strands 5a, 5b
, 5c are pulled and drawn into fibers only by the frictional adhesive force caused by the contact of the strand with the peripheral surface of the feed roller 9 over a predetermined angle 8'. Next, the cutting device 7 will be explained in detail with reference to FIGS. 2 and 3.

The feed roller 9 is a roller whose circumferential surface is lined with a material having a high coefficient of friction against glass fibers, such as polyurethane rubber, and is fixed to a shaft 21. The shaft 21 is rotatably held by a rotary housing 23 via a bearing 25, and the rotary housing 23 is rotatably supported by a pair of support members 27. The support member 27 is fixed to the housing support stand 29 with bolts 31. The housing support stand 29 is movably held by a rod 37 which is held on the pedestal 33 via a support 35.
extends in a direction perpendicular to a plane that includes the marking line of the shaft 21 of the feed roller 9. Thus, feed roller 9
is movable in the horizontal direction in FIG. 2 together with the housing support 29, and the contact area can be moved away from the cutter roller 101. A bush pressure adjusting cylinder 39 is further mounted on the pedestal 33, and its piston rod 39a is connected to the housing support 29. The cylinder 39 adjusts the bale pressure of the feed roller 9 against the cutter roller 101. The cutter roller is rotatably supported at a fixed position on the mount 33,
A large number of blades are installed on the circumferential surface of the blade at equal intervals at an oblique angle of 5 to 25 degrees with respect to the axial direction.

A pulley 41 is connected to the cutter roller 1,
It is connected to a cutter loaf drive motor 43 via a belt 45. Thus, the cutter roller 0 is driven by the motor 43, and the cutter roller 10 rotationally drives the feed roller 9. Instead of driving the cutter roller 10 with a motor, the feed loaf 9 may be driven. Further, instead of making the feed roller 9 movable in the horizontal direction, the cutter roller 10 may be made movable. The guide roller assembly 8 is composed of a main guide roller 47 having a groove corresponding to each strand, and an auxiliary guide roller 49 disposed near the main guide roller 47 having a single groove.

The main guide roller 47 is rotatably supported by a movable sleeve 51, and the auxiliary guide roller 49 partially covers the main guide roller 47 and is rotatably supported by a fixed shaft 53. Thus, the guide rollers 47 and 49 are independently rotatable. The fixed ball 53 is fixed to a bracket 55 fixed to the housing support 29, while the movable sleeve 51 is movably held on the fixed shaft 53. Furthermore, the movable sleeve 51 has a piston rod 5 of a cylinder 57 for adjusting the position of the main guide roller.
7a are connected and guided by the grooves of the main guide roller 47 to change the position of the strand wound around the feed roller 9 on the feed roller circumferential surface.
A guide pin 59 is provided near the guide roller assembly 8.

The guide pin 59 has a hook 59 bent at an almost right angle at its tip.
a (see Figure 4). The guide pin 59 is located below the strand 5 hooked on the groove of the main guide roller 47 and below the strand 5 hooked on the auxiliary guide roller 49 . The hook 59a is positioned above the land 5' and is positioned so that when the hook 59a is rotated to the position shown by the two-dot chain line in FIG. 4, the hook 59a can engage with the strand 5'. The end of the guide pin 59 is connected to a swing cylinder 61,
The swing cylinder 61 is held by a support plate 63. The support plate 63 is supported by a guide bar 67 movably held by a support sleeve 65 provided on the bracket 55, and is further connected to a piston rod 69a of a guide pin moving cylinder 69. Thus, the guide pin 59 can swing as shown in FIG. 4 and can move the guide roller in the direction of the sea bream line. The guide loaf 59 hooks the strand 5' placed on the auxiliary guide roller 49, moves, and functions to transfer the strand from the auxiliary guide roller onto the main guide roller. Details will be described later. feed roller 9
A frame 7 is attached to the rotary housing 23 that holds the shaft 21 of the
1 are held so that they rotate together.

A variable speed motor 73 is attached to an end of the frame 71, and a collet 75 is held on a rotating shaft 73a of the motor 73. In this embodiment, a two-speed variable speed motor that can be switched between high and low speeds is used as the variable speed motor 73.
The collet 75 is used to temporarily wind the strand when it is wound around the feed roller 9, and is moved from the first position shown by the two-dot chain line to the second position shown by the solid line in FIG. 2 by rotating the frame 71. Can be moved. In order to rotate the frame 71, a pinion gear 77 is attached to the end of the housing 23, and the housing support base 29 is provided with a rack gear (not shown) that meshes with the pinion gear 77 and a frame rocking ring 79 that reciprocates the rack gear. There is. A yarn guide mechanism 81 is further attached to the frame 71.

The yarn guiding mechanism 81 has a rotatable moving guide 83 made of a carbon bush and scissors 85. Moving guide 8
3 and the scissors 85 are moved by the cylinder 87 in the direction of arrow A in FIG.
The cylinder 87 is held by a rod 89 as clearly shown in FIG. The rod 89 is slidably held by a sleeve 91 fixed to the frame 71 and connected to a piston rod 93a of a cylinder 93. Thus, rod 8
9 is movable in the direction of arrow B in FIG. scissors 85
A scissor opening/closing cylinder 95 is connected to. Each of the cylinders and motors described above are connected to a control device (not shown), and are configured to be sequentially controlled to perform the threading operation described below.

Since the detailed structure of the control device is not directly related to the present invention, it will be omitted, and only the sequence operation will be explained below. First, the yarn threading operation when starting spinning and cutting from a state in which all spinning devices are stopped will be explained.

In the following description, it is assumed that the normal spinning speed (feed roller speed) is 1000 m/min. At the start of spinning, the collet 75 is in the first position (indicated by the two-dot iron line in FIG. 2), and the guide pin 59 is in the position extending forward as shown in FIG. 3 and in the rotational position shown in the solid line in FIG. 4. be. First, the cutter roller is driven.

The cutter roller and feed roller are at a steady speed (1
000 skin/min). Next, the first strathod 5' is aligned, passed through the groove of the auxiliary guide roller 49, and wound around the collet 75 in the standby position, and at the same time, the collet is started to be driven. The collet 75 is gradually accelerated,
After a few seconds a high speed (slightly higher than normal spinning speed, for example set at 1050 m/min) is reached. In addition,
Before the strand 5' is hung on the collet, the collet may be rotated at low speed (for example, 200 rpm) or high speed, and the strand may be wound around the rotating collet. The guide pin 59 is then rotated 90 degrees downwards to hook the strand 5'. After 0.9 seconds, the guide pin 59 starts to retreat, and the strand 5', which has been caught in the groove of the auxiliary guide loaf 49, is moved to the thread insertion position E (see FIG. 3) on the main guide roller.

In parallel with this operation, yarn breakage detectors (not shown) provided in each spinning device corresponding to the strands determine the presence or absence of the strands. Naturally, when the first strand is threaded, there are no other strands, so this is detected and the collet speed is reduced to a low speed (200 m/min).
This is done to prevent the strand from breaking if the strand is moved onto the non-rotating main guide roller 47 without reducing the collet speed. If another strand is wound around the feed roller via the main guide roller, the collet speed will not be reduced because the main guide roller is already rotating at high speed. When the strand is transferred onto the main guide roller, the collet is brought back to high speed (1050 m/min), and at the same time the frame 71 holding the collet 75 is rotated so that the collet moves to the second position shown by the solid line in FIG. It is moved to the folded or thread guiding position. Therefore, the strand wound around the collet has a predetermined contact angle Q with the feed roller 9.
, contact over the course of . After this, when the collet is stopped, the strand enters the chopping position (the contact position between the feed roller and cutter roller) due to adhesive contact with the feed roller, cutting begins, and yarn guiding is completed. In this case, the collet 75 is simply moved to the thread guiding position and the rotation of the collet is stopped, so the strand naturally enters the chopping position, but if the feed roller surface is rough or worn, the strand may break. The adhesion may be reduced and the strand may not penetrate into the chopping position. If there is such a possibility, operate the cylinder 93 of the thread guide mechanism 81,
Move the moving guide 83 and the scissors 85 to the thread insertion position E, then operate the cylinder 87, and push the strand downward with the moving guide 83 to a position where a predetermined contact angle Q2 is obtained. , actuate the scissors to cut the strand. At the same time as the cutting, the strand is naturally fed to the chopping position by adhesive contact against the feed roller, completing the thread guiding. . Subsequently, the guide roller 59, which had been restraining the strand at the E position, is further retreated and guides the strand to a predetermined groove of the main guide roller 47. Thereafter, the guide pin 59 is rotated to the position shown by the solid line in FIG. 4, and further retreated and removed from the strand 5', so that the strand assumes the normal walking position shown by the solid line. This completes the threading operation of the first strand to the feed roller, and then the paper threading and cutting of the first strand is performed at the normal speed. The threading of each subsequent strand is then carried out in the same manner as the threading of the first strand, without interfering with the normal speed paper threading and cutting of the first strand.

However, in the threading operation for the second and subsequent strands, when the strand is transferred from the auxiliary guide roller to the main guide roller, the main guide roller is already being rotated at high speed by the first strand, so the collet 75
There is no need to reduce the speed of the second strand during winding. The reintroduction of strands that are broken during operation is performed in the same manner as for the second and subsequent strands.

In addition, to determine which groove of the main guide roller the strand is guided, a limit switch that determines the stop position of the guide pin 59 is linked with a cut detector provided corresponding to each strand, and the limit switch is activated when the cut is detected. It can be determined automatically by activating it. In carrying out the above method, the strand wound around the collet 75 is used as the feed. In order for the feed roller to adhere to the circumferential surface of the roller 9 and reach the chopping position, the contact angles Q, Q2 and the relative speed to the feed roller are important. The inventors conducted thread insertion under various conditions and came to the following conclusion. The contact angle Q, Q2 required for thread insertion is 160 degrees and 30 degrees.

. } The collet speed must be equal to or greater than the feed roller speed, preferably collet speed = feed roller speed x 1.1.

Note that the upper limit of the collect speed is 1.
It had nine sounds. In the above embodiment, the threading operation is automatically performed after the strand is wound around the collet.

However, the present invention is not limited to this, and may be replaced with manual operation as appropriate. For example, a guide pin 59 and its driving device are provided in order to move the strand from the groove of the auxiliary guide roller to the thread insertion position E of the main guide roller, and then move the strand into the groove of the main guide roller. However, by omitting this and using an appropriate hand-holding guide,
The strands may be moved by hand. Further, as a holding mechanism for the collet 75, a frame that swings concentrically with the feed roller 9 is used to move the collet in an arc, but instead of this, the collet may be moved in a straight line. As explained above, in the present invention, while the feed roller and cutter roller are rotating normally, the strand to be threaded is first wound around the collet, and the collet is set at high speed to start drawing the strand into fibers. After that, the collet is moved to bring the strand into contact with the feed roller, and the strand is threaded onto the feed roller, so it is not fed as in the conventional method. There is no need to wrap thick unfibered strands around the tip of the roller.
Also, there is no need to cut thick strands with a cutter roller. Therefore, various drawbacks caused by conventionally winding a thick strand around a feed roller can be eliminated, and damage to the cutter blade is also reduced, allowing stable operation over a long period of time. Furthermore, when spinning and cutting multiple strands, even if one of the strands breaks, the broken strand can be easily threaded onto the feedloaf again without stopping the spinning and cutting operation of the other strands. Therefore, the production efficiency of the entire apparatus can be greatly improved.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a glass fiber chopped strand manufacturing facility to which the present invention is applied, Fig. 2 is a front view of a cutting device which is an embodiment of the present invention, and Fig. 3 is a side view of the cutting device of Fig. 2. In the figure, the collet is shown positioned above the feed roller. FIG. 4 is an enlarged front view of the guide pin 59, and FIG. 5 is a side view of the thread guiding mechanism as seen in the direction of arrow -V in FIG. 3. 1...
Paper yarn furnace, 5, 5', 5a, 5b, 5c... Strathod, 7... Cutting device, 8... Guide roller assembly, 9
...Feed roller, 10...Cutter. 11...Chopped strand, 47...Main guide roller, 49...Auxiliary guide roller, 71...Frame, 73...Variable speed motor, 75...Collet, 8
1... Thread guiding mechanism. Figure 2 Figure 1 Figure 4 Figure 3 Figure 5

Claims (1)

[Scope of Claims] 1. A strand formed by converging a large number of glass filaments spun from the bottom of a spinning furnace is placed on the peripheral surface of a feed roller with a force sufficient to impart a predetermined take-up speed to the strand through frictional adhesive force. In the method of cutting the strand into chopped strands using a cutter roller that rotates while being in pressure contact with the feed roller, the strand that is to be brought into contact with the peripheral surface of the feed roller is first placed near the feed roller. The strand is wound around a provided rotating collet, and while being wound around the collet, the winding speed of the collet is set to the steady speed of the feed roller or higher, and then the collet is moved to stop the strand running toward the collet. ,
A method for threading glass fiber strands, characterized in that the feed roller is brought into contact with the feed roller rotating at a constant speed over an angular range such that the feed roller can be taken off by frictional adhesion. 2. A feed roller disposed so as to be brought into contact with the periphery over a predetermined angular range in order to collect a strand formed by converging a large number of glass filaments spun from the bottom of a spinning furnace at a predetermined take-up speed; and the feed roller. A cutting device having a cutter roller that rotates in pressure contact with the feed roller, and a main guide roller that is arranged on the side of the feed roller and regulates the winding position of the strand that is wound around the feed roller, and a main guide roller that is arranged close to the main guide roller and rotates. an auxiliary guide roller that can rotate independently of the guide roller; a collet that winds up the strand that has passed through the main guide roller and the auxiliary guide roller; a variable speed drive that rotationally drives the collet; and a support device carrying a drive device,
The support device moves the collet between a first position where the strand between the collet and the main guide roller does not contact the feed roller and a second position where the strand contacts the circumferential surface of the feed roller over a predetermined angle. A threading device for glass fiber strands, characterized in that the threading device is capable of holding glass fiber strands. 3. A feed roller arranged so as to be in contact with the peripheral surface over a predetermined angular range in order to take off the strand formed by converging a large number of glass filaments spun from the bottom of the spinning furnace at a predetermined take-up speed; A cutting device having a cutter roller that rotates in pressure contact with the feed roller, and a main guide roller that regulates the winding position of the strand that is wound around the feed roller, which is arranged on the side of the feed roller, and a main guide roller that is arranged close to the main guide roller. an auxiliary guide roller which can be rotated independently of the main guide roller; a collet that winds up the strand that has passed through the main guide roller and the auxiliary guide roller; a variable speed drive device that rotationally drives the collet; and a support device carrying a variable speed drive device, the support device moving the collet to a first position where the strand between the collet and the main guide roller does not contact the feed roller and a predetermined peripheral surface of the feed roller. The collet is held movably between a second position where the collet contacts the feed roller over an angle of . A threading device for glass fiber strands, comprising a thread guiding mechanism having a moving guide for increasing the wrapping angle and scissors for cutting the strand between the moving guide and the collet.