JPS5860059A - Method and apparatus for cutting wheather edge of glass fiber fabric - 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 The present invention relates to a method and apparatus for cutting and removing phase edges of fiberglass fabric covered by water jet looms, air jet looms, and piece looms such as rapier looms.

Recently, a piece loom has been developed as an innovative loom to increase the productivity of glass fiber fabrics, and it has begun to be used in production.However, the edges of the glass fiber fabric covered by the piece loom are feather-etched, that is, tufted on both sides. It becomes. This method involves inserting the weft from only one side of the fabric, cutting it with a cutter, and inserting the next weft again, resulting in feather edges on both sides of the glass fiber fabric. It is something. The selvage of glass cloth made with the conventional Nyattle loom is made by placing the weft thread wound around a woodwind into a 7-yattle thread, then driving the shirttle thread from the right with a picker, then from the left, and so on, without cutting a single thread. In order to form the glass fiber fabric by folding it from the left and right sides, the weft threads are folded back from the end of the warp at the left and right selvedges, resulting in a beautiful straight selvage with no excess threads. It had become.

By the way, printed boards used in computers and the like are made of laminates made of glass fiber fabric impregnated with epoxy resin, etc., but before the printed boards are rolled up, copper-clad laminates are first made. To make this copper-clad laminate, glass fiber fabric is impregnated with epoxy resin and cured to create prepreg. In the case of epoxy resin, this prepreg is in a semi-cured state, hard and brittle. Therefore, the feather edge part is hardened into a needle shape, for example, prepreg f 1
When stacking the pieces cut into m pieces, it gets stuck in your hand when you handle it, the stacked prepregs are high at both ends and cannot be stacked high, and the prepregs collide with each other and powder comes out from the feather edges of the prepregs. Since the chips fall off and adhere to the surface of the prepreg due to static electricity, the copper foil is damaged when the prepreg and copper foil are laminated and press-molded, so it has been strongly desired to improve the feather edges of glass fiber fabrics.

Fabrics produced using fragmentary looms such as ester and nylon also have feather edges, but these are treated so that they do not become a problem, such as by cutting them off or sewing them in at the stage of being sewn into clothing. Feather edge handling problems are unique to glass fiber fabrics. Therefore, the present inventors have arrived at the present invention as a result of intensive research. No. 50-15908 for a method for fusing and cutting glass fiber fabrics, and JP-A No. 52-85596 for a method for fusing and cutting heat-fusible fiber fabrics.
However, the former creates a selvedge with a minute width that can withstand folding and sewing, and the purpose is to move the fabric vertically and horizontally and cut it into various shapes. Since it is a type of material, it is cut using only the power of a laser beam. The purpose of the latter method is to use the reflection of the laser beam to advance the fusion of the cut portions, since the fusion portion of the cut surfaces of the former method is insufficient, and to obtain a cut surface that is free from fraying. However, the purpose of the present invention is to improve feathering of glass fiber fabric.
Because it involves cutting and removing edges, it does not fuse the cut surfaces, resulting in clean cut surfaces and high productivity. As mentioned before, when making prepreg, it would be a problem if the ears became bulky, so large molten beads could not be formed on the cut surface, and since the feather edges had to be cut once they were made, it would be costly unless high productivity was achieved. For example, it was desired that the feather edges could be cut and removed at the same time as the glass fibers were processed. Of course, the cutting speed can be increased by using a laser device with a higher output, but it is important to increase the cutting speed with a lower output device.

This invention was made in view of the above-mentioned circumstances, and its purpose is to efficiently melt and cut the feather J-edge of glass fiber fabric produced by a fragmentary loom using a laser beam, without generating large molten beads on the cut surface. We propose cutting methods and equipment that produce a clean finish. The gist of this invention is that when cutting the feather edge of a glass fiber fabric using a fragment edger, a clean laser beam is irradiated onto the line to be cut, and at the same time, a clear laser beam is applied from the main body of the fabric to the laser edge cutting section at the irradiation position. A method for cutting a feather edge of glass fiber fabric characterized by applying an external force in the direction of pulling it apart, and a device for this purpose.

Embodiments of the cutting method and apparatus of the present invention will be described below with reference to the drawings.

In FIG. 1, one laser irradiation device A is installed on each side of a glass fiber fabric 2 woven by a piece loom having feather edges 1 on both sides. In this irradiation device A, a beam bender 4 extends from an oscillator 5, and a condensing lens and a nozzle with a cooling device for the lens are attached to the tip of the beam bender 4 (not shown). As the feather edge moves in the warp direction (downward in the drawing), the laser beam can be irradiated along the line 5 where the feather edge is to be cut. Further, traction devices B are provided on both sides of the fabric 2, respectively. This traction device (3) is located in front of the pair of traction gears 7.7 and 7.7 that grip and pull the feather edge cut portion 1', and contacts the feather edge cut portion 11 to change it. It is composed of a guide roll 6 for directing.

To cut a feather edge with this device, turn the handle 8 attached to the irradiation device A'z
The frame 9 is moved and positioned via the vehicle 10. The irradiation position is set to a width that includes at least one warp yarn in the feather-edge cut section 1+ and forms a continuous cut section 11. Then, while the fabric 2 is running, a laser beam is emitted, and the line 5 to be cut is irradiated with the laser beam. The fused cut portion 1' contacts the guide roll B and changes its direction, and its leading end is held between the traction gears 7 and 7 and pulled. The guide roll 6 is at the laser beam irradiation position 51
and the traction gear 7°7, and the pulled cutting section 11 is fixed at a position having an appropriate opening angle outward with respect to the side edge of the fabric main body 21, that is, the cutting line 5.
A force is applied to the feather edge cut portion 1' at the laser irradiation position 51 in a molten state to separate it from the fabric body 21, and the feather edge cut portion is cut and separated from the dough body 21.

Here, the deflection guide 6 is for pulling out the cut portion 1' of the feather edge at an appropriate angle, so it may be a rotary type or a flexible pin type. Further, the traction device may be a mesh gear type as shown in the figure or a press roll type as long as it can provide a constant traction force. Also,
When irradiating the laser beam, the edge of the fabric 2 can be detected using an air guide method or a phototube method, and the laser irradiation device A2 can be moved to control the laser irradiation position at any time.

The advantage of the direction changing guide system shown in FIG. 1 is that it is a simple pulling mechanism and can stably apply a pulling force at the cutting point.

FIG. 2 shows a side view of another embodiment of the cutting device. The fabric 2 runs in contact with the rolls 14,15. A traction device B consisting of a guide roll 6 and a traction gear 7.7 is located below both sides of the fabric 2, and the feather-edge cutting section 11 is pulled downward at an opening angle with respect to the cutting line 5. Therefore, a force is applied to the feather edge cut portion 11 at the irradiation position 5' in a direction to separate it from the fabric main body 21, and the feather edge cut portion 11 is cut and separated. The advantage of this method of pulling the fibers downward with the help of guide rolls 6 is that even if the width of the feather edge cutting section becomes wide, it can be carried out in an unreasonable manner because it is fed in the same feeding direction as the glass fiber fabric. However, the laser irradiation position 51
Since the purpose is to apply a force to separate the objects, it is not strictly limited to left and right or up and down, but it can also be carried out diagonally.

The apparatus shown in FIG. 6 is equipped with a suction pipe 11 as a traction device B that sucks in a direction having an opening angle with respect to the cutting line 5. In order to cut the feather edge 1 of the fabric 2 with this device, the laser irradiation device irradiates the laser at the cutting line 5 of the feather edge to be cut, and the continuous feather edge cutting section 11 is moved by the suction vibrator 11. The feather edge cut portion 11 at the laser irradiation position 5I is cut and separated by applying a force to separate it from the fabric main body portion 51. A filter 12 and a suction blower 13 are connected to the suction pipe 11, and the feather edge cut portion 1' sucked from the suction pipe 11 is captured within the filter 12. The distance between the tip of the suction pipe and the laser irradiation position 51 is not particularly limited, but it may be a distance that ensures stable suction from the cut portion 11 of the feather edge. Further, when the cut portion 1' of the feather edge is suctioned by the suction pipe 11, the cut portion 11 of the feather edge and the fabric main body 2' take an appropriate opening angle to provide a force for separating them at the irradiation position 51. Install the suction pipe 11.

The advantage of the suction method shown in Figure 6 is that since it is an air suction method, it has a mitigating effect even if the cutting force fluctuates, so there is no unreasonable cutting noise and no cutting errors occur! ! It is difficult to damage. In addition, even if the cutting part 1' breaks, suction can be started again by oneself with the suction pipe, and it is easy to set up when starting.

The traction device B of the cutting device shown in FIG. 4 consists of a rod-shaped body 16 with a square cross section and a traction gear 7.7. This rod-shaped body 16 is connected to the lower surface of the fabric main body 21 which is supported in contact with the rolls 14.15 and runs under tension, and the feather edge cut portions on both sides of the fabric 1 which is in contact with the rolls 15 and is held and pulled by the traction gear 7.7 and runs. It is sandwiched between the upper surface of 11.

Therefore, when a laser beam is irradiated from the laser irradiation device A and the textile 2 and the cutting part 11 are towed and run, the textile main body part 21 and the cutting part 1 are located at the apex of the laser irradiation position sl-q.
An opening angle is formed between the parts 1 and 1, and a force is applied in a direction to separate the cutting part 11 from the main body part 21, so that the cutting part 11 is separated.

The cross section of this rod-shaped object is shown in the figure. may be rectangular or circular, as long as it is at an angle that provides a force to separate the feather edge cut portion 1' and the fabric body portion 2' at the laser irradiation position 51.

In this rod-shaped object insertion method, when the center position of the rod-shaped object 16 is aligned with the level of the laser irradiation position 51, the laser irradiation position 51
Glass fiber fabric 2 because the level of
Even if vibrations occur due to running, the cross can be stably cut without causing any cutting abnormalities. This means that since the laser beam is condensed and the light energy is maximized at the focal point, it is efficient to run the glass fiber fabric at the height of the focal point and cut the feather edge. This means that it is important to set conditions so that the fabric in the il1 row does not vibrate and deviate from the range of the focal depth because the depth is limited. The neck shank method allows stable cutting even when the cutting width of the feather edge becomes wide.

In the device shown in FIG. 5, the tufted portions of the feather edges of the glass fiber fabric 2, that is, the wefts, protrude.

It cuts only the part of the weft that is fluttering. The laser irradiation device A lp of this device irradiates a cutting line 5 connecting the protruding weft roots with a clean laser.

The traction device B consists of a suction pipe 11, a filter 12 and a suction blower 13 communicating with the suction pipe 11, and the suction pipe 11 is arranged close to the laser irradiation position 51 so as to suction outward at a substantially right angle to the cutting line 5. It is.

This device can cut the tufted fibers at the feather edge of the weft, which is cantilevered and half free, by irradiating the base of the tufted fibers with a laser beam while the suction pipe 11 is pulling the tufted fibers. . When attempting to cut only the tufted portion, if there is no suction traction device available, a gas (oxygen, nitrogen, carbon dioxide, or air) is used to protect and cool the condensing lens attached to the beam bender. The tufted fibers cannot be kept at a constant level due to the flow of 5 to 7 minutes of gas, which is selected depending on the material to be cut, and the depth of focus of the laser beam However, by suctioning the tufted fibers with the suction-type traction device of the present invention, the height level could be kept constant, and the force of pulling the tufted fibers to the laser irradiation position 5' could be maintained. can give a feather
Now I can cut edges better.

The present invention will be further explained below with reference to Examples.

(Example 1) Cutting device: As shown in FIG. 1, the laser irradiation device had an actual output of 35 W, a current collector lens with a focal length of 50 mm was used, and the cooling gas was oxygen at 15 t/min.

Glass fiber fabric Nistyle 7628/1270. Both warp and weft ECG7510Iz1 density 44 x 52 threads/25 pieces, thickness 0.18, cloth width 1270 Sushi Jojo P1! Against.

A laser is irradiated onto a line with a width of 5 tran on the ground part of the fabric (the part where the warp is present), and the opening angle 20' between the cutting part 11 and the side edge of the fabric body part 21, that is, the cutting line 5 is set, and the irradiation position is At 5', the cut portion 11 was towed away. Stable cutting was possible at a cutting speed of 6 m for 7 minutes. Furthermore, since the material was completely melted at the cutting point and separated, the molten beads at the cut end were small and clean without falling off.

(Example 2) Using the apparatus shown in FIG. 2, using the laser irradiation device and glass fiber fabric under the same conditions as in Example 1, the opening angle between the cutting part 1' and the side edge of the fabric main body part 21 was set to 10. The vehicle was towed away in a different direction. The cutting speed was 6 m/7 minutes, and since the laser irradiation position was cut before it was completely melted, the molten beads on the cut surface were small and clean without falling off afterwards.

Note that the same gray glass fiber fabric (untreated) and heat-cleaned fabric were also cut, but no difference was observed due to the treatment.

(Example 5) Using the apparatus shown in FIG. 3, using the laser irradiation device and glass fiber fabric under the same conditions as in Example 1, the opening angle between the cutting part 1' and the side edge of the fabric main body part 21 was set to 45'. , the vehicle was towed away in a different direction. The cutting speed was 6 m/min, and since the laser irradiation position was cut before completely melting, the molten beads on the cut surface were small and clean without falling off later.

(Example 4) Using the apparatus shown in FIG. 6, the same conditions as in Example 1 were used, except that the cooling gas was air, 30 t/divided flow 17, and the opening angle between the cutting part 1' and the side edge of the fabric body part 21 was 90 degrees. None, the vehicle was towed away in a different direction. The cutting speed was 10 m/min, and the cut surface had almost no molten beads and looked like it had been cut with scissors.

(Example 5) In the device row of FIG. 4, using the laser irradiation device and glass fiber fabric under the same conditions as in Example 1,
It was made of chrome-plated steel with a width of 20 mm, a length that could span two widths of fabric, and a chrome-plated steel. This stick 1
6 was placed between 70 and the laser irradiation position 5' and cut. Cutting speed can be increased up to 7m/7min.

The cut surface was clean with small molten beads and no falling off.

(Comparative Example) Cutting was carried out under the same conditions as in Example 1, except that the cut portion was run in the same direction with respect to the main body of the fabric without being separated. The speed for complete cutting was 5 vn/min. In addition, the cut end of the glass cloth was thick and uneven with molten glass beads, and it was observed that when cut, the molten beads would chip and fall off.

(Example 6) Using the apparatus shown in Fig. 5, using the laser irradiation device and glass fiber fabric under the same conditions as in Example 1, the tip of the suction pipe 11 was set at a distance of 5 m+++ from the tip of the feather edge, and suction was carried out at the same time. A laser was irradiated along the root of the tufted fiber consisting only of the weft yarns of the feather edge. Cutting speed is 5 m
I was able to get it up to 7 minutes. When the suction vibrator 11 was not used, cutting was performed at a speed of 1 m/min, which resulted in cut marks and could not be cut cleanly.

As explained above, the feather edge cutting method according to the present invention makes it possible to obtain clean cut edges at high speed by using the cutting force of the laser beam in conjunction with the force that physically separates the cut portion at the irradiation position. It's a Nishida thing.

As a result, we were able to create a prepreg surface structure for printed circuit boards that had no problems, and using an innovative loom, we were able to create fabrics with fewer defects while also being able to cut and remove the defective feather edges at a low cost. This shows a remarkable effect.

[Brief explanation of drawings]

1, 2, 3, 4, and 5 are a tenth view, a side view, and a side view respectively showing the cutting device according to the present invention and the feather edge cutting state of glass fiber fabric. They are a top view, a side view, and a partial plan view of one side. A... Laser irradiation device, B... Traction device, 1... Feather etch, 11... Feather etch cutting section, 2... Glass fiber fabric, 2'... Glass fiber fabric main body, 5...
Oscillator, 4...beam, bender, 5...line to be cut, 5'.... - laser irradiation position, 6... guide roll, l... traction gear, 8... handle, 9... mount, 10... car, 11... suction pipe, 12... filter, 16... suction blower 114 ,15...roll,1
6. Stick-shaped object. Patent Applicant Asahi Schniebel Co., Ltd. Agent Hisakado Chi Proceedings Amendment Letter October 30, 1980 Patent Office Director Blind Shima Tatsuma Kodono 1! Display of Jl- 1981 Patent Application No. 15581-2 Title of Invention Method for cutting feather edges of glass fiber fabric and cutting &11 3 Sleeve 1 Asahi'/Univel Type Company Name (first name) 4 Agent Details of the amendment Attachment structure 1: The detailed description of the invention column in the specification is amended as follows. ■ Specification No. 5 @ 10 Correct line ``Weaving'' to ``Weaving.'' ■ Correct ``Outsole'' in lines 4 to 5 of the same page to ``Weaving.'' ■ Correct ``Sewing'' in line 6 of the same page to ``Sewing.'' IF the sleeves. ■ Correct "fabric body part 5'" in line 5 of No. 11 of the same to "fabric body s2'". ■ Correct "outer construction" in line 16 of No. 18 of the same to "manufacturing."

Claims (6)

[Claims] (1) When cutting the feather edge of a glass fiber fabric using a fragmentation loom, a laser beam is irradiated along the line to be cut, and at the same time, a laser beam is applied to the cut part of the feather edge at the irradiation position in a direction in which it is pulled away from the main body of the fabric. A method for cutting a feather edge of glass fiber fabric, characterized by applying an external force of. (2) A method for cutting a feather edge of a glass fiber fabric according to claim 1, characterized in that an external force is applied to pull the feather edge cut portion in a different direction via a direction change guide and pull it apart. (3) A method for cutting a feather edge of a glass fiber fabric according to claim 1, characterized in that an external force is applied to attract and separate the feather edge cut portion in a direction opposite to the direction of the cutting line. (4) A rod-like object is placed on the surface of the glass fiber fabric approximately perpendicular to the line to be cut, and a fabric main body is attached to one side of the rod-like object, and a feather edge cutting section is attached to the opposite side to form a feather edge. 2. A method for cutting a feather edge of glass fiber fabric according to claim 1, characterized in that an external force is applied to pull and pull the cut portion apart. (5) Claim 1, characterized in that a laser beam is irradiated along the line of the feather-edge tuft made only of weft yarns, and an external force is applied to attract and separate the tuft.
A method for cutting a feather edge of a glass fiber fabric as described in 2. (6) In a device for cutting the feather edge of glass fiber fabric using a fragmentation loom, a laser beam is irradiated along the line to be cut, and the laser irradiation device is used to cut the feather edge cutting portion of the glass fiber fabric at the laser beam irradiation position. What is claimed is: 1. A feather cutting device for glass fiber fabric, comprising: a traction device that pulls the fabric in a direction in which it is pulled away from the main body.