JPH07251396A - Cutter roll for cutting fiber - Google Patents

Abstract

PURPOSE:To provide a cutter roll for cutting fiber which has cutting blades easily replaceable, hardly clog cut-fiber and suitable for cutting glass fiber etc., very short. CONSTITUTION:Cutting blades 13 are aligned radially on the outer peripheral surface of a roll main body 12 and are fixed on a stepped part 20 by way of covering them with a cover. A first reference plane 15 and a second reference plane 17 of the cutting blade 13 are formed so that a space between a knife edge 21 and a knife edge of another adjacent cutting blade comes to be a space W equivalent to specified length of fiber to cut off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber cutting cutter roll, and more particularly to a fiber cutting cutter roll suitable for finely cutting inorganic fibers such as glass fibers, carbon fibers or ceramic fibers.

[0002]

2. Description of the Related Art As a device for finely cutting glass fibers and the like (a device for producing chopped strands or chopped strand mats in the case of glass fibers), conventionally, a cutting device as shown in FIGS. 5 and 6 has been used. Has been. This device is mainly composed of a cutter roll 1, a contact roll 2 and a pressing roll 3, and the cutter roll 1 is provided with a plurality of cutting blades 4 projecting radially, and the cutting blades are provided for the contact roll 2 made of hard rubber or the like. 4 are sequentially pressed to finely cut the fiber 5 fed between the contact roll 2 and the pressing roll 3. Generally, the rotational driving force is the contact roll 2 or the cutter roll 1.
It is given to one of the, and the other rolls are designed to rotate together. Reference numeral 7 in the drawing is a member for preventing the cut fibers 6 from being scattered around. Although only four cutting blades 4 are shown in FIG. 5, the number of actually mounted blades is generally larger than the number shown in the figure.

Although various structures have been proposed for attaching the cutting blade 4 to the cutter roll 1, the most widely used at present when the cutting length is short is to cut the outer peripheral surface of the cutter roll 1. The groove is formed by the number of blades 4, and the base end side of the cutting blade 4 is embedded in the groove. Such a structure is shown in FIGS.

In the example shown in FIG. 7, the width of the groove 8 provided in the cutter roll 1 is made substantially equal to the thickness of the cutting blade 4. Of course, the pitch between the cutting edges of the cutting blade 4 is made to coincide with the cutting length of the fiber. It is supposed to do.

Further, as shown in FIG. 8, a cutter roll 1
There is also known a structure in which the cutting blades 4 and the spacers 9 are alternately arranged on the outer peripheral surface without providing any groove or the like, and the cutting blades 4 are sandwiched between the spacers 9 and 9. In this case as well, the pitch between the cutting edges of the cutting blade 4 matches the cutting length of the fiber.

Although not shown in the drawing, in the structure of the type shown in FIG. 7, the width of the groove 8 is made wider than the thickness of the cutting blade 4, and a spacer or a corrugated plate spring is inserted in the gap to fix the cutting blade 4. The structure that does is also known.

Although not shown in the drawings, in the above-mentioned conventional examples, a large number of pieces are cut by covering the end of the cutting blade 4 with the fixing cover at the end of the cutter roll 1 in the axial direction. The blade 4 is finally fixed. There are various publicly known end shapes of the cutting blade for this purpose, but the most commonly used one is that the end of the cutting blade is tapered so that the tip side is narrowed, This is an example in which a protrusion having a shape corresponding to the peripheral edge is provided and locked, and in addition, there is also known that a protrusion is provided at the end of the cutting blade and an outer peripheral edge of the cover or the like is engaged with the protrusion.

[0008]

By the way, in recent years, particularly in the cutting of glass fibers, products requiring a very short cutting length of 1 to 3 mm have appeared. In order to satisfy this requirement with the structure of FIG. 7, it is easiest to shorten the interval between the grooves 8, but the surface processing of the cutter roll 1 becomes fine, and it is very troublesome to attach and detach the cutting blade 4. There is a problem of becoming. Further, in the structure of FIG. 8, the spacers 10 are very thin, and the number is large,
There is a problem that attachment and detachment of the cutting blade 4 is more troublesome than the structure shown in FIG. As is well known, the cutting of glass fibers and the like breaks the fibers by applying a force that exceeds the allowable bending stress of the fibers, so that the cutting blade is strongly pressed against the fibers having a relatively high hardness to bend. In addition, since the cutting blade is always subjected to a large pressing force and is rotated at a high speed in order to improve the manufacturing efficiency, the cutting edge of the cutting blade 4 is easily worn due to the sliding contact with the contact roll 2 and the fiber, and the replacement frequency is high. However, it has been urgently desired to solve the above-mentioned problem of troublesome attachment and detachment. Further, when the cutting length is shortened, the cut fibers are apt to be clogged between the cutting blades 4, and the cutting length may be varied, or the cutting may be partially impossible. Therefore, this point is also solved. Was desired.

The present invention has been made in view of the above points, and it is easy to dispose the cutting blade in correspondence with a very short cutting length, and it is easy to replace it, and there is a problem due to clogging of cut fibers. It aims at providing the cutter roll for fiber cutting which can also solve.

[0010]

In order to achieve the above object, a fiber cutting cutter roll according to the present invention has a plurality of cutting blades radially arranged on the outer periphery of a roll body, and is opposed to a hard roll body facing each other. A cutter roll for fiber cutting that presses the cutting blade with the fiber to be cut in between and presses the fiber to be continuously supplied, and has a plurality of cutting blades on the outer peripheral surface of the roll body. The two cutting blades are arranged side by side, and the two side surfaces facing each other in the circumferential direction of the cutting blade form a gap corresponding to a desired cutting length of the fiber at a position on the circumference including the cutting edge.

In the fiber cutting cutter roll according to the present invention, one of the facing side surfaces is a first reference surface and the other is a second reference surface, and the second reference surface is the first reference surface. Slightly inclined from parallel to the surface, when continuously provided on the outer peripheral surface of the roll body, the distance between the cutting edge of one cutting blade and the cutting edge of the other cutting blade and the length to be cut of the fiber and It can be configured to be formed as follows.

In the fiber cutting cutter roll according to the present invention, the second reference surface is an end surface of a step portion projecting from an intermediate portion of a third reference surface facing in parallel with the first reference surface. It can also be configured.

In the fiber cutting cutter roll according to the present invention, a plurality of cutting blades are radially arranged on the outer periphery of the roll body, and the above-mentioned cutting blades are pressed by sandwiching the fiber to be cut against the facing hard roll body. It is a cutter roll for cutting fibers, which is applied and continuously chopped into the above-mentioned fibers, wherein the outer shapes of the plurality of cutting blades are a first reference surface along the radial direction of the roll body, and the first reference surface. The flank face which forms a cutting edge by intersecting the reference face with a predetermined blade angle, a second reference face which is connected to the flank face and extends toward the roll body, and the first and second reference faces. Including a base surface which is located between the end edges of the surface on the side of the roll body and is orthogonal to the first reference surface, and the distance between the first reference surface and the second reference surface at the cutting edge position, Corresponding to the size of the fiber to be cut, the axial direction of the roll body In axial direction and having a protruding step in contact with the outer peripheral surface of the roll body on the end face,
The plurality of cutting blades are continuously provided on the outer peripheral surface of the roll body such that the second reference surface of the other cutting blade adjacent to the first reference surface of the one cutting blade is in contact with the first reference surface, and The step portion of the cutting blade is locked by fixing plates fitted from both end surface sides of the roll body, and the second reference surface is the end intersecting with the base surface and the intersecting position with the flank surface. The roll is terminated at an intermediate position with respect to the edge, the end edge side with respect to the intermediate position is made parallel to the first reference plane to be recessed, and is slightly inclined with respect to the first reference plane. It is also possible to adopt a configuration in which, when continuously provided on the outer peripheral surface of the body, the distance between the cutting edge of one cutting blade and the cutting edge of another cutting blade is the length to be cut by the fiber.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fiber cutting cutter roll according to the present invention will be described below with reference to the drawings. 1 is an enlarged side view showing an embodiment of the present invention, FIG. 2 is a partially exploded perspective view of an embodiment of the present invention, and FIG. 3 is a sectional view taken along the axial direction of the cutter roll of FIG.

In the cutter roll 10 of this embodiment, the cutting blade is sequentially pressed against a contact roll made of hard rubber or the like in the same manner as in the conventional example, and the glass fiber or the like supplied by the contact roll and the pressing roll is finely divided. For cutting, mainly a stepped shaft 11, a hollow roll body 12, a large number of cutting blades 13 ... And a pair of covers 1 for fixing the cutting blades.
It consists of four and fourteen.

The cutting blades 13 are made of, for example, cemented carbide, and are arranged directly on the outer peripheral surface of the roll body 12 so as to be arranged radially in a radial direction. Reference surface 15, flank surface 16, second reference surface 17,
The base surface 18 and the third reference surface 19 are provided, and the axially opposite end surfaces of the roll body 12 each have a step portion 20 having a lower surface protruding so as to contact the outer peripheral surface of the roll body 12.

The first reference surface 15 is placed on the roll body 12 in the radial direction of the roll body 12 (line R- in the figure).
R), the flank 16 is a sloping surface and intersects the first reference plane 15 at a predetermined tool angle θ (25 degrees in the illustrated example) to form a cutting edge 21. Second reference surface 17 and third
The reference plane 19 of does not extend in a series to the position where it intersects with the base plane 18, but the second reference plane 17 ends at the intersection position with the flank face 16 and the intermediate position between the base plane 18 and the first plane from that position. Third reference plane 1 parallel to and close to the reference plane 15 of
It has a stepped shape of 9. The second reference plane 1
7 is not parallel to the first reference plane 15 but the cutting edge 21
It is slightly inclined so that the side opens, and when arranged on the outer peripheral surface of the roll main body 12, the distance W (for example, 2 mm) between the cutting edge 21 of one cutting blade 13 and the cutting edge 21 of another cutting blade 13 is respectively The fiber is formed to have a specified length to be cut. Therefore, if the required number of cutting blades 13 are lined up in the circumferential direction on the roll body 12, the specified cutting length can be easily configured.

As for the shape of the cutting blade, as shown in FIG. 4, there are four surfaces in cross section, the first reference surface 15A and the flank 1
6A, the second reference surface 17A and the base surface 18A alone may be included, and the present invention includes the cutting blade 13A having such a shape, but in the case of the structure like this example, it is relatively wide. In order to form the second reference surface 17A with a required tolerance, a precise working operation is required for a very hard cemented carbide. On the other hand, in the case of the cutting blade 13 of FIGS.
Since the reference surface 17 is relatively small, the working operation can be performed very easily.

Further, in the cutter roll 10 of this embodiment, a large number of cutting blades 13 are arranged directly and radially on the outer peripheral surface of the roll body 12, and the cutter roll is provided on the step portion 20 of each of the cutting blades 13 arranged in an annular shape. Disc-shaped covers 14 and 14 are covered from both end sides of 10 and the whole is fixed by screwing the cover 14 to the roll body 12 although not shown. The cover 14 is provided with a locking edge 22 that fits into the step portion 20 and presses the step portion 20. Since the inner peripheral surface of the locking edge 22 is a circumferential surface and the upper surface of the step portion 20 is a flat surface in consideration of the ease of processing, the step portion 20 is in an assembled state.
Although the inner surface of the cover 14 does not come into contact with and presses against the upper surface of the, the centrifugal force acts in the high-speed rotation state, and the first reference surface 15 of each cutting blade 13 is naturally moved to the shaft 11. The fibers are arranged radially along the radial direction, so to speak, in a state of being aligned and standing on the outer peripheral surface of the roll body 12, and the dimensions between the cutting edges 21 of the cutting blade 13 are equalized, so that the variation in the cutting length of the fiber is reduced. .

A state in which the cutter roll 10 in the assembled state as described above is used in combination with a contact roll and a press roll as in the conventional case will be described. In the state of being combined with the contact roll, one of the cutting blades 13 of the cutter roll 10 that faces the contact roll is in a state in which the blade edge 21 bites slightly into the surface of the contact roll, and therefore rotates with the rotation of the contact roll. When glass fibers or the like are fed between the two in this state, the blades bend the glass fibers or the like by the force of cutting into the surface of the contact roll, and the glass fibers are cut by applying a force exceeding the allowable stress.

At this time, the blade edge 21 is slightly displaced in the rotational direction due to the contact with the contact roll, but when it is separated from the contact roll, it returns to its original state by centrifugal force. This cutting blade 13
Due to the above behavior, the cut fibers do not remain in the space between the blades, but are subjected to centrifugal force and fly out. Further, the adjacent cutting blades 13 and 13 have the first reference plane 1
Since the V-shaped groove that is open to the outside is formed by 5 and the flank surface 16, it becomes difficult for the cutting blades 13 and 13 to stop (that is, clogging is difficult), and even if the cut fiber is once cut, Even if it gets into the space between No. 13 and No. 13, it will easily get out due to the centrifugal force.

When it is desired to replace only one or a plurality of cutting blades due to wear of the cutting blades 13,
It suffices to press around the currently installed cutting blade with an appropriate jig or string so as not to drop it off, remove the cover 14 on one side, remove the required cutting blade, and insert a replacement. Of course, all the cutting blades may be removed once, the ones that need to be replaced may be replaced, and all the cutting blades may be attached again. Since the cutting blade 13 is held down only by the cover 14, the replacement work of the cutting blade is easy even when the cutting length is short, which was conventionally troublesome to replace.

In the above embodiment, the material of the cutting blade is cemented carbide, so the price of the cutting blade itself rises,
Since the hardness of the cemented carbide is higher than that of the glass fiber or the like to be cut, the sharpness is improved, the abrasion is less, the operation can be performed for a long time, and eventually the operating cost is not increased. Of course, the present invention is not limited to the dimensions, shapes, materials, etc. of the respective constituent elements of the embodiment described above, and the specifications may be set in consideration of various elements such as the fiber to be cut and the cutting length. Good.

[0024]

As described above, the fiber cutting cutter roll according to the present invention has a plurality of cutting blades on the outer peripheral surface of the roll body at intervals corresponding to the desired cutting length of the fiber to be cut. Since they are arranged side by side instead of each other, it is possible to easily configure the arrangement mode in which fibers such as glass fiber are cut blades with a very short cutting length, and since the grooves and spacers are not used, the cutting blades can be easily replaced. The effect is that the cut fibers are less likely to be clogged.

[Brief description of drawings]

FIG. 1 is an enlarged side view showing an embodiment of a fiber cutting cutter roll according to the present invention.

FIG. 2 is a partially exploded perspective view of the same.

3 is a sectional view taken along the axial direction of the cutter roll of FIG.

FIG. 4 is an enlarged side view corresponding to FIG. 1 showing another embodiment of the fiber cutting cutter roll according to the present invention.

FIG. 5 is a perspective view showing a main part of a general device configuration for cutting glass fibers and the like.

6 is an enlarged side view showing a cut state of fibers by the apparatus of FIG.

FIG. 7 is a cross-sectional view showing an example of a conventional cutting blade mounting structure.

FIG. 8 is a cross-sectional view showing another example of a conventional attachment structure for a cutting blade.

[Explanation of symbols]

 10 Cutter Roll 11 Stepped Shaft 12 Roll Main Body 13 Cutting Blade 14 Cover 15, 15A First Reference Surface 16, 16A Flank Surface 17, 17A Second Reference Surface 18, 18A Base Bottom 19 Third Reference Surface 20 Step Section 21 cutting edge

Claims (4)

[Claims] 1. A plurality of cutting blades are radially arranged on the outer circumference of a roll body, and the cutting blades are pressed against a hard roll body facing each other with a fiber to be cut therebetween, and the cutting blades are continuously supplied. A cutter roll for fiber cutting for shredding fibers, arranging a plurality of cutting blades on the outer peripheral surface of the roll body without a gap, and two side surfaces facing each other in the circumferential direction of these cutting blades,
A cutter roll for fiber cutting, characterized in that an interval corresponding to a desired cutting length of the fiber is formed at a position on the circumference including a cutting edge. 2. One of the facing side surfaces is a first reference surface and the other is a second reference surface, and the second reference surface is slightly inclined with respect to parallel to the first reference surface. Then, when continuously provided on the outer peripheral surface of the roll body, the distance between the cutting edge of one cutting blade and the cutting edge of the other cutting blade is formed to be the length to be cut of the fiber, The cutter roll for fiber cutting according to claim 1. 3. The second reference surface is an end surface of a step portion projecting from an intermediate portion of a third reference surface facing in parallel with the first reference surface. Cutter roll for fiber cutting. 4. A plurality of cutting blades are radially arranged on the outer circumference of a roll body, and the cutting blades are pressed against the hard roll body facing each other with the fiber to be cut therebetween, and continuously fed. A cutter roll for cutting fibers, wherein the outer shape of the plurality of cutting blades is a first reference surface along the radial direction of the roll body, and a predetermined blade with respect to the first reference surface. A sloped flank that intersects at an angle to form a cutting edge,
A second reference plane that is connected to the flank and extends toward the roll body, and a base that is located between the end edges of the first and second reference planes that are on the roll body side and is orthogonal to the first reference plane. Including a surface, the distance between the first reference surface and the second reference surface at the cutting edge position is made to correspond to the dimension of the fiber to be cut, and the both end surfaces in the axial direction of the roll body in the axial direction. It has a step portion protruding so as to come into contact with the outer peripheral surface of the roll body so that the second reference surface of another cutting blade adjacent to the first reference surface of one cutting blade abuts. The plurality of cutting blades are continuously provided on the outer peripheral surface of the roll body, and the stepped portions of these cutting blades are locked by fixing plates fitted from both end surface sides of the roll body. End the reference plane at an intermediate position between the intersection with the flank and the edge that intersects with the base surface. , The edge side of the intermediate position is parallel to the first reference plane to be recessed, and is slightly inclined with respect to the first reference plane, and is continuously provided on the outer peripheral surface of the roll body. A fiber-cutting cutter roll, characterized in that, at that time, the distance between the blade edge of one cutting blade and the blade edge of another cutting blade is formed to be the length at which the fiber should be cut.