JPH01272829A - Fiber-cutting apparatus - Google Patents

Abstract

PURPOSE:To produce short fibers, by using an apparatus for uniform alignment of fiber-bundle and provided with conical pins, placing the apparatus on the upstream-side of a cutter, aligning the bundle while preventing the meandering motion and cutting the bundle to a prescribed length with a cutter. CONSTITUTION:An apparatus 14 for uniform alignment of fiber-bundle is placed on the upstream-side of a cutter part 15 to cut a fiber bundle supplied between a rubber roller 16 and plural cutters 17 arranged on the circumference of a circular cutter roller 18 at regular intervals. The bundle-alignment apparatus 14 is provided with a number of conical pins on a base with prescribed pitch and is effective in preventing the meandering motion of the fiber bundle and uniformly aligning the bundle.

Description

[Detailed description of the invention] Shin-1 The present invention generally relates to S
In order to produce short fibers as reinforcing materials used in manufacturing fiber reinforced composite materials such as MC and BMC,
Or produce short fibers to be mixed into fiber-reinforced cement used as building materials (the equipment used in this case is
(commonly called a roping cutter), for example, a fiber cutting device that cuts continuously supplied fibers such as glass fibers or carbon fibers into short fibers to produce short fibers.
In particular, we aim to prevent meandering of fibers such as glass fibers or carbon fibers that are continuously supplied to be cut in order to make short fibers, and to make the cut lengths of fibers uniform.
I was able to enjoy the fiber alignment device that can eliminate the fluff of fibers! J & fiber cutting equipment.

In recent years, fiber-reinforced composite materials such as SMC have been widely used in various fields such as aerospace, land transportation, ships, construction and civil engineering, industrial parts, electroacoustic equipment, agricultural and fishing materials, and sporting goods. There is. Such fiber-reinforced composite materials have strength, heat resistance,
It is used as a material with excellent corrosion resistance, friction, electrical properties, and light weight.
When producing reinforced composite materials, in order to use fibers such as glass fibers or carbon fibers as reinforcing materials, short fibers are produced by cutting these fibers into fixed lengths such as 3 mm, 6 mm, or 12 mm. The short fibers are then moistened with a resin such as an unsaturated polyester resin or a vinyl ester resin, and the viscosity thereof is appropriately thickened to form a sheet, which is then subjected to matte die molding or the like. In this way, the strength of SMC can be improved by producing SMC by wet-mixing short fibers with resin.

This short lam is typically made as follows. That is, when producing short fibers by cutting supplied fibers such as glass fibers or carbon fibers into short lengths with a cutter, 1.
The supplied fibers, such as glass fibers or carbon fibers, are gathered together and formed into a bundle-like fiber bundle, and this fiber bundle is attached to a creel stand that holds and accommodates a large number of boppins around which the fiber bundles are wound. The fiber bundles #a are continuously supplied from each bopin to the guide roller that guides the fiber bundle #a, and further, the fiber bundles supplied from the guide roller come into contact with each other, and the fiber bundles la! In order to prevent disturbances in the supply of II bundles and to prevent the traveling direction of the fiber bundles from being significantly deviated, the supplied Ia fiber bundles are passed through an M&I train device for arranging the fiber bundles, and then the fiber bundles are The fiber bundles are sent from this fiber bundle arrangement device to a cutter section consisting of a car roll having cutters arranged at equal intervals on the circumference and a rubber roll placed opposite to the cutter rolls. The fiber bundles that are continuously supplied are cut into a certain length using a cutter roll to produce short #& fibers.

However, the fiber bundle arranging device for arranging fiber bundles by passing the fiber bundles as described above conventionally has a plurality of straight pins on a base 14a, as shown in FIGS. 3a and 3s. The fiber bundles are passed between these straight peas 14b at equal intervals, and the fiber bundles are arranged and supplied to the cutter section to be cut. Was.

However, if the distance between the straight pins 14b in the m-Ito arrangement device through which the supplied m#I bundle passes is larger than the size d of the supplied fiber bundle (see Figure 3C). ), the supplied mis-bundle is fed while playing left and right between the pins, which causes the supplied fiber bundle to meander in the spacing between the pins, and as a result, it is cut at the cutter section. There was a problem in that it was difficult to accurately and uniformly align the cut lengths of the fibers.

In addition, when the m-ITO is arranged and supplied to the cutter section via the fiber bundle arrangement device, it is necessary to adjust the spacing between the straight pins 14b, for example, depending on the thickness of the supplied fiber bundle. , or when it becomes necessary to change the pitch of the supplied fiber bundle, the supplied Mll, 1
Fiber bundle arrangement device t arranged perpendicular to the flow of one bundle
When the fiber bundle arrangement device 14 is rotated and tilted to have an angle (see FIG. 3C), or when the fiber bundle arrangement device 14 described above is formed so as to be foldable like a folding screen, the m#I formed at the foldable end is By expanding or contracting the bundle distribution device 31 in a zigzag pattern (see FIG. 3C), the distance between the straight pins 14b through which the supplied fiber bundles pass was adjusted.

Furthermore, as described above, in order to adjust the effective spacing between the pins through which the fiber bundle passes, depending on the thickness of the m male die to be supplied, the angle of the fiber bundle arrangement device described above with respect to the fiber bundle supply direction is adjusted. , by rotating and tilting the fiber bundle arranging device, that is, by tilting the fiber bundle arranging device with respect to the feeding and passing direction of the fiber bundle, the appearance of the fiber bundle passing between the pins of the fiber bundle arranging device is changed. The pitch interval of is made smaller with respect to the supplied fiber bundle, and when the relationship d is reached, the supplied bundle m#I is pinched between the straight pins.

The supplied fiber bundle rubs against the straight pin! a A fiber bundle rubbing phenomenon occurs, and as a result, the fiber bundle may break or the fibers may become fluffy, which is not preferable in producing a fiber reinforced composite material such as SM''c.

Therefore, if it is necessary to change the effective spacing between the pins through which the fibers pass depending on the thickness of the supplied fiber bundle, each time the fiber bundle arrangement device changes the pin thickness or the spacing between the pins. You can replace it with a different one or have a little "Play 1"
．． Rubbing phenomenon 1 must be accepted as unavoidable in the production of short fibers used in the production of taaaa composite materials such as SMC, and as a result, a certain degree of meandering of the fiber bundle and, therefore, the cutter The short fibers that are cut at different locations may have uneven cut lengths, and the supplied fiber bundle may be broken or fluffy.

Therefore, when replacing the fiber bundle arrangement device, not only is a cumbersome replacement work required, but also a decrease in yield and damage to the device in the production of short fibers used in manufacturing fiber reinforced composite materials such as SMC. This will lead to a decrease in operating efficiency, and if "play" or "rubbing phenomenon" is tolerated, it will cause meandering or thread breakage of the supplied m-fiber, which will cause the m-fiber to be cut into the cutter. As a result, the cut length of the fibers cut at the cutter section becomes uneven, resulting in mw such as SMC.
There is a problem in that it is not suitable for producing short fibers used in producing i-reinforced composite materials.

[Therefore, it is an object of the present invention to produce short fibers as reinforcing materials used in manufacturing fiber-reinforced composite materials such as SMC or by using something like a roping cutter. In order to produce short fibers for reinforcing cement, when cutting fiber bundles supplied as reinforcing material to produce short fibers, the supplied fiber bundles are arranged while preventing meandering and are To provide a #a fiber cutting device capable of supplying a fiber bundle to a cutter section that cuts the fiber bundle and cutting the supplied fiber bundle to a uniform fixed length at the ivy section to produce short fibers. It is.

Another object of the invention is to use cement reinforcement for making short fibers as reinforcement used in manufacturing fiber reinforced composite materials such as SMC or using something like a roping cutter. When cutting the fiber bundle supplied as a reinforcing material to produce short m fibers, even if the pitch or thickness of the supplied fiber bundle changes,
There is no need to replace the fiber bundle arrangement device as in the past, and therefore there is no reduction in yield or equipment operating efficiency, and there is no fuzzing of the supplied fibers, making it simple and easy. In response to changes in the pitch or thickness of the supplied fiber bundles, the supplied MAA bundles can be arranged and supplied to the cutter part while preventing meandering, and in this way, the supplied fiber bundles can be uniformly distributed in the ivy part. It is an object of the present invention to provide a fiber cutting device capable of producing short fibers by cutting them into a certain length.

1. The above-mentioned aspects for the above-mentioned purposes are achieved by the fiber cutting device according to the present invention. In summary, the present invention is a fiber cutting device for producing short fibers as a reinforcing material used in manufacturing fiber-reinforced composite materials, which cuts continuously supplied mi east at a cutter section. In order to produce the short L& fibers, a fiber bundle is provided with conical pins for preventing the supplied fiber bundles from meandering and for supplying the supplied fiber bundles with evenly spaced intervals between them. This fiber cutting device is characterized in that a uniform arrangement device is provided upstream of the cutter section.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the invention will be described based on embodiments thereof with reference to the accompanying drawings.

Referring to FIG. 1, one according to the present invention. 1. For example, glass fibers that are continuously fed to make short m fibers as a reinforcing material used when manufacturing fiber reinforced composite materials such as SMC, or to make short fibers with a roping cutter. , carbon fiber or aramid fiber, etc.
A fiber cutting device to is shown for cutting fibers into short lengths to produce short fibers. This m! The i-cutting device 10 holds and houses a large number of poppins 11 that wind up fiber bundles formed by combining fibers such as glass M&fibers, carbon fibers, and aramid fibers. This creel stand 1 is equipped with a creel stand 12 that
Fiber bundles for producing short fibers are continuously supplied from each of the poppins 11 of 2.

A guide roller 13 is disposed below the creel stand 12 to align and guide the fiber bundles continuously supplied from each poppin 11 of the creel stand 12 to a certain extent. In order to prevent the fiber bundles supplied from the guide rollers 13 from coming into contact with each other and causing disturbance in the fiber bundle supply, and to prevent the traveling direction of the fiber bundles from being largely deviated, that is, to prevent the fiber bundles from meandering. At the same time, an evenly distributing device 114 is provided for evenly arranging the supplied fiber bundles in order to equalize the mutual spacing between the fiber bundles.

As shown in detail in FIG. 2, this fiber bundle uniform arrangement device 114 includes a base 14a with a large number of conical pins 14b erected at a desired bifurcation P.
Preferably on the base 14a.

A rotary lifting device that can rotate freely in a horizontal position using a drive device (not shown) and can also perform lifting and lowering operations.
l 4 c is installed, and the fiber bundle uniform arrangement fi14
The surface of the 0-conical pin 14b, which allows the whole to rotate freely in a horizontal plane position and also to move up and down, is a part that lightly contacts the supplied fiber bundle, and it is preferable to give this surface a satin finish. The #a fiber bundle etc. arranging device 14 may be folded into a folding screen shape so that it can be expanded or contracted in a zigzag shape as desired.

Ia fiber uniform arrangement device a that is foldable in this way
lt14 changes in various ways depending on the spread state of the m bundles supplied from the guide roll 13, but for example, when the total width W of the supplied am bundle group is in the spread state of 300 mm, it is shown in FIG. 2a. For example, bend parts A and B.
, C and D, the dimensions of the foldable fiber bundle uniform arrangement device having folded portions A, B, C and D are as follows:
are formed with the following dimensions. In other words, the interval between the Besa supply fiber bundles that are aligned is 13 mm.
When set to ~20mm 1 For example, the length is 120mm
The number of conical pins provided in the bent portions A and D of is 6 pieces, for example, the bent portion B with a length of 100 mm,
The number of conical pins provided in C is 5, and the cone dimensions of each conical pin are 18 mm in diameter at the bottom, 11 mm in diameter at the top, and 100 mm in height.

In the vicinity of this fiber bundle uniform arrangement device i14, downstream thereof, there is a cutter section 15 for cutting the supplied fiber bundle whose mutual spacing has been made uniform by the fiber bundle uniform arrangement device t14.
In other words, the fibers are evenly arranged upstream of the cutter section 15! 114 is arranged, and this ivy part 15 is 1
It is composed of a rubber roller 16 that rotates in the direction of the arrow shown in the figure, and a cylindrical cutter roller 18 that is placed opposite to the rubber roller 16 and rotates as a result of contact with the rubber roller 16. Rubber roller 1
6 rotation shaft 19 and a drive motor 20 arranged at a predetermined position.
A belt 22 is stretched between the drive shaft 21 and the drive shaft 21, and by rotating the drive motor 20, the rubber roller 16 is rotated via this belt 22, and as a result, the rubber roller 16 is driven to rotate. The cutter roller 18 can be rotated.

A plurality of cutters 17 are provided at equal intervals on the circumference of the cylindrical cutter roller 18, and when a distance of m is supplied between the rubber roller 16 and the cutter roller 18, the rotation of the drive motor 20 is The continuously supplied fiber bundle is cut by the cutter 17 of the cutter roller 18 rotated by the cutter 170 at constant distances arranged at equal intervals on the circumference of the cutter 170, that is, at a constant uniform length.

In this way, the short i##i 23 that is continuously supplied to the cutter section 15 and cut by the cutter 17 of the cutter roller 18 falls and is used as a reinforcing material.

The operation of the fiber cutting device a of the present invention having the above structure will be described below.

Now, when the fiber cutting device 10 is in operation, for example, 10 poppins (in this embodiment, 4 poppins are used for simplicity).
from each poppin 11 of the creel stand 12 that accommodates and holds the
For example, a fiber bundle of 12,000 full-diameter fibers is continuously fed at a speed of 5 to 20 m per minute, preferably 1 ion per minute, aligned to some extent, and placed downstream of the guide roller 13. The fibers are guided by the provided fiber uniform arrangement device fi14.

In this way, the supplied fiber bundles are guided to the fiber bundle uniform arrangement device 14 which includes conical pins for evenly arranging the supplied fiber bundles in order to prevent the supplied fiber bundles from meandering and to equalize the mutual spacing between the fiber bundles. When the fiber bundles are passed through the fiber bundle uniform arrangement device 14, they are in light contact with the conical surface of one conical pin, and as a result of this passage, the intervals between the fiber bundles are made uniform.

Here, depending on the thickness of the supplied m#I bundle, m! When it is necessary to change the gap between the pins through which the i-bundle passes, or when it is necessary to change the spacing between the supplied fiber bundles, the rotary lifting device 14c of the fiber bundle uniform arrangement device 14 is operated, and the fiber By raising and lowering the bundle uniform arrangement device 14 in the vertical direction or rotating it in a horizontal position,
By substantially changing the spacing between the conical pins through which the supplied fiber bundles pass, i.e. by changing the conical surface portion of the conical pins through which the supplied fiber bundles pass, By changing the spacing, the gap between the pins or the spacing between the fiber bundles can be continuously selected.

Then, it is supplied from the fiber bundle uniform arrangement device ff114. The fiber bundles, which are prevented from meandering and whose spacing between the fiber bundles is uniform, are supplied to the cutter section 15.

The fiber bundle supplied to the cutter section 15 is cut into a constant uniform length by a cutter roller 18 which is rotated by the rotation of the rubber roller 16 of the cutter section 15 driven by a drive motor 20, and by the ivy 17 thereof.

At this time, the cutting length of the fibers to be cut is determined by the cutters 17 arranged at equal intervals on the circumference of the cylindrical cutter roller 18 at a constant distance, that is, a constant uniform length of 0 fibers. In the embodiment, the cutters 17 are arranged at equal intervals of 3 mm on the circumference of the cutter roller 18, so the cut length of the fibers to be cut is a uniform length of 3 mm, as described above.

Here, the arrangement of the cutters 17 on the circumference of the cutter roller 18 is 2 mm, 1.5 mm, 3 mm, 6 mm, for example.
, every 12 mm, every 24 mm, and so on.

The short fibers 23 thus produced by cutting into uniform, fixed lengths fall below the cutter section 15.

Under the above conditions, that is, the diameter of the supplied fiber is 7JL.
When a fiber bundle of 12,000 fibers is supplied from each lopin at a rate of 10m per minute, and the length of the fiber bundle is 3 mm, the amount of short fibers cut is 4.
．． It was 8 kg/hour.

As described in the above embodiment, in order to produce short fibers, the supplied fiber bundle to be cut is passed through the fiber bundle uniform arrangement device and supplied to the cutter section, thereby preventing the meandering of the supplied fiber bundle. It is possible to prevent this, and the fibers can be well supplied to the cut section at uniform intervals, and as a result, the length of the fibers cut at the cut section can be made uniform and constant. . In other words, it is possible to produce short fibers of a constant length with a uniform cut length, and when manufacturing fiber reinforced composite materials such as SMC using these short fibers, it is possible to produce stable fibers with good appearance and quality. Fiber reinforced composite materials can be produced.

Furthermore, as mentioned above, when it is necessary to change the gap between the pins through which the fiber bundle passes depending on the thickness of the supplied fiber bundle, or when it is necessary to change the interval between the supplied fiber bundles, In this case, the rotating lifting device 14c of the fiber bundle uniform arrangement device t14 is activated, and the fiber bundle uniform arrangement device M14 is raised and lowered in the vertical direction or rotated in a horizontal position, so that the supplied fiber bundles are brought into light contact with each other. By changing the conical surface portion of the conical pin through which the supplied fiber bundle passes and substantially changing the interval between the conical pins through which the supplied fiber bundle passes, the gap between the pins or the interval between the fiber bundles can be varied. Unlike conventional methods, there is no need to replace the fiber bundle arrangement device for arranging the intervals between the fiber bundles, and there is no need to replace the fiber bundle arrangement device for arranging the intervals between the fiber bundles, and there is no need to replace the fiber bundle arrangement device that arranges the intervals between the fiber bundles. There is no "rubbing" phenomenon caused by being squeezed between the pins, and the gap between the pins or the spacing between the fiber bundles can be easily changed as desired.
Even if the thickness of the supplied fiber bundle changes, as mentioned above, the short m
It is possible to prevent meandering of the supplied #am east to be cut for textile manufacturing, and it is possible to supply the fibers to the cut section well at uniform intervals, so that the fibers can be cut at the cut section. The length of the fibers to be cut can be made uniform and constant.

Note that the "conical shape 1" of the conical pin described in the above embodiments does not necessarily mean a truncated conical shape with the top cut off as shown in the drawings, but in the present specification.

It also includes a conical shape with a pointed top, and is intended to have a generally conical shape.

As explained above, according to the fiber cutting device of the present invention, in order to produce a short am, the supplied fiber bundle to be cut is passed through the fiber bundle uniform arrangement device to the cutter section. By supplying the fibers, it is possible to prevent the supplied fiber bundle from meandering, and the fibers can be well supplied to the cutting section at uniform intervals.As a result, the fibers that are cut at the cutting section can be cut easily. The length can be made uniform and constant, and therefore short fibers having a uniform cutting length can be produced.

Also, when it is necessary to change the thickness of the supplied fiber bundles or the distance between the fiber bundles, the u1
Without the need to replace the 1 m bundle arrangement device, and therefore without causing a decrease in yield or equipment operating efficiency, it is possible to easily adjust the spacing between the pins through which the supplied fiber bundles pass, or between the supplied fiber bundles. It is possible to change the spacing between the fiber bundles, to make the spacing uniform, and to prevent the supplied fiber bundle from meandering, so even if the thickness of the supplied fiber bundle changes, it is possible to cut it to make short fibers. Meandering of the supplied fiber bundle to be cut can be prevented, and the short fibers produced by cutting the supplied fiber bundle at the cut portion can be cut to a uniform, constant length.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of an embodiment of a fiber cutting device according to the present invention. 2 is a schematic partial enlarged view of the fiber bundle uniform arrangement device used in the fiber cutting device of FIG. 1. FIG. FIG. 2a is a schematic explanatory diagram of a foldable fiber bundle uniform arrangement device used in the Ml#I cutting device of FIG. 1. FIG. 3a is a schematic partial enlarged view of an m-male array device used in a conventional m#I cutting device. 3b to 3d are schematic illustrations of an m-male array device used in a conventional fiber cutting device. lO: Fiber cutting device 12: Creel stand 14: Fiber bundle uniform arrangement device 14a: Base 14b: Conical pin 14c: Rotating lifting device 15: Force-7 tab section 16: Rubber roller 17: Cutting roller 18: Cutting roller first Figure 2 Figure 0

Claims (1)

[Claims] 1) A fiber cutting device that produces short fibers as a reinforcing material used in manufacturing fiber-reinforced composite materials, in which the continuously supplied fiber bundle is cut by a cutter section to produce the short fibers. In order to prevent the supplied fiber bundles from meandering and to supply the supplied fiber bundles with equal intervals between each other, a fiber bundle uniform arrangement device is provided which is equipped with a conical pin. A fiber cutting device characterized in that it is provided upstream of a cutter section.