JP4910106B2 - Manufacturing method of carbon fiber reinforced plastic cutter roll - Google Patents

Description

Technical Field This invention relates to a method of manufacturing a carbon fiber reinforced plastic cutter roll in a rotary cutter device for cutting the continuous predetermined length of paper or paperboard long.

  Conventionally, a rotary cutter device is used to continuously cut long paper or paperboard into a predetermined length. The rotary cutter device includes a cutter roll with a knife attached thereto and a bottom roll that faces the cutter roll and has a parallel rotation axis, and is driven by a driving device. Cutting is performed by passing paper or paperboard between the cutter roll and the bottom roll.

  In these rotary cutter devices, the outer peripheral surface of the bottom roll is made of hard metal so that it does not easily wear even when the cutter blade hits it, and the uncut portion is not left on the paper to be cut. You will receive a strong shock. Further, the cutter roll may be deformed by the impact and cannot be cut. Therefore, a metal roll is conventionally used for the cutter roll, and the strength (elastic modulus) is improved by quenching the metal.

  Since such a cutter roll is made of metal, it is heavy and has a problem that the overall deflection becomes large and the moment of inertia (GD2) also increases and the speed cannot be increased.

For this purpose, the applicant applied a hollow formed by laminating a carbon fiber layer impregnated with a matrix resin and laminating a carbon fiber layer, or winding a carbon fiber prepreg impregnated with a matrix resin and laminating a carbon fiber layer. A cutter roll with journals attached to both ends of a structured roll body was proposed.
JP 2006-102832 A

  However, since the cutter roll described in the above publication is formed by fitting journals at both ends of a roll body having a hollow structure, if the impact at the time of cutting is large, a load is generated on the fitting portion, and the fitting portion May loosen.

The present invention has been made in view of the present situation, and a cutter roll made of carbon fiber reinforced plastic that uses a steel core is relatively light in weight and therefore has a relatively small moment of inertia (GD2), and a method for producing the same. The purpose is to provide.
Another object of the present invention is to provide a carbon fiber reinforced plastic cutter roll capable of increasing the line speed because the moment of inertia (GD2) is relatively small, and a method for producing the same.
It is another object of the present invention to provide a carbon fiber reinforced plastic cutter roll that does not loosen the journal and a manufacturing method thereof by integrally forming the core and the journal.

In order to achieve the above object, the present invention is configured as follows. That is, in the method for producing a cutter roll made of carbon fiber reinforced plastic according to the present invention, a matrix resin is impregnated on the outer surface of a steel core having a plane portion provided parallel to the axial direction and having a substantially oval cross-sectional shape . Lamination process in which carbon fiber is wound and laminated, or a carbon fiber prepreg impregnated with carbon fiber is impregnated and laminated, a curing process in which the carbon fiber layer is heat-cured, a polishing process in which the surface is polished after cooling, carbon fiber A journal forming step of cutting off an additional shaft connected to the tip of the journal to form a layer, a cutter blade attaching step of attaching a cutter blade to the surface,
In the laminating step, an additional shaft serving as a shaft for forming the carbon fiber layer is connected to the journals at both ends of the core, and a constricted portion having a pressing die fixing hole is provided on the journal side of the additional shaft. Using a steel core
In the curing step, using a pressing die composed of two pressing plates for molding a flat portion, and a split plate that fixes the pressing plate and has a concave portion that sandwiches the constricted portion on the abutting surface, A pin protruding from the concave portion of one of the connecting plates is inserted into the pressing die fixing hole of the constricted portion to abut the connecting plate, and the two pressing plates are pressed against the flat portion. After fixing to the connecting plate, it is cured in a heat curing furnace,
The journal forming step is characterized by cutting off from the joint portion of the constricted portion .

It is preferable to include a molding step for forming the outer shape of the carbon fiber layer by clamping between the lamination step and the curing step.

Also, in the lamination step, the carbon fibers impregnated with the matrix resin are wound at about 90 degrees with respect to the axial direction and laminated, and then the carbon fibers impregnated with the matrix resin are set at a certain angle with respect to the axial direction. A carbon fiber layer may be formed by repeating a plurality of times by winding and laminating and repeating the layer wound at approximately 90 degrees with respect to the axial direction and the layer wound at a certain angle .

In the laminating step, the carbon fibers impregnated with the matrix resin are wound at a certain angle with respect to the axial direction and laminated, and then the carbon fibers impregnated with the matrix resin are wound at about 90 degrees with respect to the axial direction. A layer of carbon fibers can be formed by repeating a plurality of times by laminating and winding the layer wound at a certain angle with respect to the axial direction and the layer wound at about 90 degrees.

  Since the carbon fiber reinforced plastic cutter roll according to the present invention comprises a steel core and a carbon fiber layer as a surface layer, the moment of inertia (GD2) can be made relatively small. In addition, since the moment of inertia (GD2) is also relatively small, speeding up and labor saving can be achieved by speeding up the line.

  In addition, by forming the core and journal integrally, the journal will not loosen even when subjected to a load during cutting, and the cutter roll as a whole is not too light, not too heavy, and the cutting surface is not too heavy. Can be cut cleanly.

  Below, the embodiment of the cutter roll made from carbon fiber reinforced plastics concerning this invention is described in detail. As shown in FIGS. 1 and 2, the cutter roll 1 is a carbon fiber in which a journal 3 is attached to both ends of a steel core 2 and is wound and laminated while impregnating a matrix resin on the outer surface of the steel core 2. The layer 4 is formed. The core 2 and the journal 3 are integrally formed. The steel core 2 is formed in a substantially oval cross-sectional shape in which a flat portion 5 which is flat on the surface is provided in parallel to the axial direction.

  A cutter blade 6 is attached to the surface of the carbon fiber layer 4 in the axial direction. In this embodiment, the steel core has a substantially oval cross-sectional shape in which the flat plane portion 7 is provided in parallel to the axial direction, but the cross-sectional shape of the core can be variously modified. For example, in addition to the case where the cross section is circular, the cross section may be a regular triangle, a square, a regular pentagon, or the like. Thus, even when the cross-sectional shape of the core is deformed, the cutter blade 6 is attached to the apex position.

  The carbon fiber layer 4 may be formed by winding a carbon fiber while impregnating the matrix resin with the carbon fiber, or may be formed by winding a carbon fiber prepreg obtained by impregnating the carbon fiber with the matrix resin. When the carbon fiber layer 4 is formed by winding the carbon fiber while impregnating the matrix resin with the carbon fiber, the carbon fiber impregnated with the resin is wound around approximately 90 degrees with respect to the axial direction and laminated, and then impregnated with the resin. The carbon fibers are wound while being laminated at a constant angle with respect to the axial direction, and a plurality of layers alternately wound at approximately 90 degrees with respect to the axial direction and layers wound at a certain angle are alternately disposed. It is preferable to form it repeatedly.

  The attachment structure of the cutter blade 6 is not particularly limited, and may be attached by a known structure. For example, as shown in FIG. 2, a pair of substantially L-shaped cutter holders 6a and 6a are fixed opposite to the outer peripheral surface of the carbon fiber layer 4, and a cutter blade 6 is interposed between the cutter holders 6a and 6a. It can be set as the attachment structure to wear.

  In this case, the pair of substantially L-shaped cutter holders 6a and 6a are preferably adhered to the outer peripheral surface of the carbon fiber layer 4 using an adhesive and fixed with bolts 6b. Not only the bolts 6b but also an adhesive can be used to fix them more firmly, and the number of bolts 6b can be reduced.

  Next, an embodiment of a method for producing a carbon fiber reinforced plastic cutter roll according to the present invention will be described in detail. As shown in FIG. 3, the outline of the cutter roll manufacturing method according to the present invention includes a laminating step 10 in which a carbon fiber impregnated with a matrix resin is wound around a steel core to form a carbon fiber layer 4, and a carbon fiber. A molding step 20 for adjusting the shape of the outer peripheral surface of the layer 4, a curing step 30 by a heating furnace, a polishing step 40 for smoothing the surface, and an addition provided continuously at the tip of the journal to form a carbon fiber layer It comprises a journal forming process 50 for cutting off the shaft and a cutter blade mounting process 60.

  In the lamination step 10, first, a mandrel 11 corresponding to the outer shape of the cutter roll is prepared. FIG. 4 shows a mandrel 11 having the steel core 2 and the journal 3 shown in FIGS. 1 and 2, and an additional shaft 12 serving as a shaft for forming a carbon fiber layer is connected to the tip of the journal 3. Is formed by. On the side of the journal 3 of the additional shaft 12, a constricted portion 13 is provided by forming a groove on the outer peripheral surface. The constricted portion 13 is provided with a hole 14 for fixing a pressing die to be described later. Yes.

  The steel core 2 is formed so that plane portions 7 and 7 parallel to the axial direction face each other. This embodiment is based on a filament winding method in which a carbon fiber layer is formed by winding a carbon fiber around a mandrel while impregnating the matrix resin with a matrix resin.

In the laminating step 10, the carbon fiber is drawn from the bobbin 16 and wound around the mandrel 11 while being impregnated with the resin by the matrix resin impregnation device 17. In the illustrated embodiment, the bobbins 16 are arranged in four rows and three stages, and the carbon fibers are pulled out by a pair of pulling rolls 18 and combined into one. The matrix resin impregnation apparatus 17 is provided with an adhesion roll 17c for adhering the resin liquid 17b in the tank to the carbon fiber drawn from the bobbin 16 in the resin tank 17a. The adhering roll 17c is half the diameter of the resin liquid 17b.
In the following, it is preferably arranged so as to immerse about one third.

  It is preferable to use an electrical insulating epoxy resin for the resin liquid 17b in the resin tank 17a. As the matrix resin, in addition to the epoxy resin, a phenol resin, an unsaturated polyester resin, or the like can be used.

  With the above-described configuration, the carbon fiber drawn out from the bobbin 16 is drawn out by the drawing roll 18 and wound around the mandrel 11 while contacting the adhesion roll 17c. The adhering roll 17c rotates substantially in synchronism with the winding speed of the carbon fiber, and adheres the resin liquid 17b in the resin tank 17a.

  The winding of the carbon fiber around the mandrel 11 can be performed, for example, as follows. First, in the first step, 6-ply is wound in the 90-degree direction with respect to the axial direction, and then the helical winding tilted by 20 degrees with respect to the axial direction is wound on the 4-ply. In the second step, 90-ply is wound with respect to the axial direction. 4 ply wound in the direction of the angle, and then the helical winding inclined 12 degrees relative to the axial direction is wound on the 4 ply. In the third step, the winding is performed in the same manner as the second step. Four plies are wound in the 90-degree direction, and four-ply is wound on the helical winding inclined 15 degrees with respect to the axial direction. Thus, 1 A of intermediate roll bodies in which the layer of carbon fiber was formed were obtained.

  In the next molding step 20, in order to mold the flat portions 7 and 7 in parallel, a pressing die 21 shown in FIG. 5 was used. Note that the pressing die 21 is not limited to the illustrated embodiment, and is naturally changed according to the outer surface shape of the roll body.

  The pressing die 21 includes pressing plates 22 and 22 for molding a flat portion, and a connecting plate 23 that fixes the pressing plates 22 and 22 and is attached to the constricted portion 13 of the additional shaft 12. The pressing plates 22, 22 are concave plates with ribs 22b, 22b standing at right angles at both ends of the long plate 22a. Long holes 22c for inserting bolts are formed at both ends of the long plate 22a. It is installed.

  On the other hand, the connecting plate 23 includes a pair of divided pieces 23a and divided pieces 23b divided into two, and concave portions 24a and 24b for holding the constricted portion 13 are provided on the abutting surfaces of the divided pieces. ing. Screw holes 25 are formed in the upper and lower surfaces of the divided pieces 23a and 23b so as to be screwed with bolts 24 inserted into the long holes 22c. Further, the divided piece 23b is provided with a through hole 26 penetrating the side surface. Further, a screw hole 27 is formed in the inner side surface of the split piece 23a so as to coincide with the through-hole 26 when screwed together and to screw the bolt. A pin 28 to be inserted into the hole 14 of the constricted portion 13 protrudes from the concave portion 24a. The bolt 29 is inserted into the through hole 26, and the tip portion is screwed into the screw hole 27.

  In order to use the pressing die 21 according to the above-described configuration, the pin 28 of the split piece 23a is fitted into the hole 14 of the constricted portion 13, and the split piece 23a and the split piece 23b are brought into contact with each other to connect the constricted portion 13 with the recesses 24a and 24b. As a result, the bolts 29 are inserted into the through holes 26 and the tip ends are screwed into the screw holes 27 to assemble them together. Since the pin 28 is fitted in the hole 14 of the constricted portion 13, the connecting plate 23 is attached integrally without rotating.

Next, the pressing plate 22 may be opposed to the upper and lower surfaces of the connecting plate 23, bolts 24 may be inserted from the long holes 22c at both ends, and screwed into the screw holes 25 to be tightened. The pressing plate 22 is fixed in parallel to the connecting plate 23, and the connecting plate 23 itself does not rotate. And the height of the connection board 23 is formed in the height which presses the parallel plane part of the surface of 1 A of intermediate | middle roll bodies. Therefore, a parallel plane part can be molded by the pressing plate 22 on the surface of the intermediate roll body 1A.

  In the curing step 30, the intermediate roll body 1 </ b> A clamped by the pressing die 21 is cured by the heat curing furnace 31. Curing in the heating and curing furnace 31 is preferably performed by raising the temperature in two stages. For example, after heating to 80 ° C. over about 1 hour and heating for about 4 hours, the temperature is further raised to 140 ° C. over 1 hour. Heating for about 4 hours, then removing from the heat curing furnace 31 and naturally cooling.

  The intermediate roll body 1A is polished in the polishing step 40. Since the surface of the intermediate roll 1A is not a uniform smooth surface, it is necessary to polish the surface. After polishing, the surface carbon fibers may fall off, and it is preferable to coat the surface. For the surface coating, the matrix resin impregnated with carbon fiber may be used as it is, or the matrix resin is mixed with fluorine powder or silicone resin to make it difficult for the paper powder to adhere to the cutter roll surface, or the matrix resin is ceramics. It is also possible to improve the wear resistance of the cutter roll surface by mixing a system powder.

  Next, in the journal forming step 50, the additional shaft 12 provided continuously for molding the intermediate roll body 1A is cut and separated. The additional shaft 12 may be cut off from the joint portion 12a on the front end surface of the journal to form the journal 3 having a normal size. Since it is impossible to make a hole in the journal 3 in order to attach the pressing die 21, the additional shaft 12 is continuously provided for attaching the pressing die 21, and the journal 3 having a normal size is formed by cutting off the additional shaft 12. It becomes.

  Finally, the cutter blade 6 may be attached in the cutter blade attaching step 60. In the cutter blade attaching step 60, the cutter blade 6 may be attached by a known means, and is not particularly limited.

It is a front view of the carbon fiber reinforced plastic cutter roll concerning this invention. It is an AA line expanded sectional view of FIG. It is explanatory drawing which shows a manufacturing process. It is a perspective view which shows an example of a mandrel. It is a perspective view which shows the state before an assembly | disassembly and the assembly before a shaping | molding process.

1: Cutter roll
2: Steel core
3: Journal 4: Carbon fiber layer
5: Plane portion
6: Cutter blade
6a: Cutter holder 6b: Bolt 7: Plane portion 10: Lamination process 11: Mandrel
12: Additional shaft 13: Constricted part
14: Hole 16: Bobbin
17: Matrix resin impregnation device 18: Draw roll 20: Molding step 21: Stamp
22: Press plate
22c: long hole
23: Connecting plate 24: Bolt
25: Screw hole
26: Through hole
27: Screw hole 28: Pin
29: Bolt 30: Curing process 40: Polishing process 50: Journal forming process 60: Cutter blade attaching process

Claims (4)

A carbon fiber impregnated with a matrix resin is wrapped around and laminated on the outer surface of a steel core having a plane portion parallel to the axial direction and having a substantially oval cross-sectional shape , or the carbon fiber is impregnated with a matrix resin. laminating step of laminating by winding carbon fiber prepreg, curing step of heat curing the carbon fiber layer, a polishing step of polishing the cooled surface, cut off an additional shaft provided continuously to the tip of the journal to form a carbon fiber layer Including a journal forming step, a cutter blade attaching step for attaching a cutter blade to the surface,
In the laminating step, an additional shaft serving as a shaft for forming the carbon fiber layer is connected to the journals at both ends of the core, and a constricted portion having a pressing die fixing hole is provided on the journal side of the additional shaft. Using a steel core
In the curing step, using a pressing die composed of two pressing plates for molding a flat portion, and a split plate that fixes the pressing plate and has a concave portion that sandwiches the constricted portion on the abutting surface, A pin protruding from the concave portion of one of the connecting plates is inserted into the pressing die fixing hole of the constricted portion to abut the connecting plate, and the two pressing plates are pressed against the flat portion. After fixing to the connecting plate, it is cured in a heat curing furnace,
In the said journal formation process, it cuts off from the junction part of a narrow part, The manufacturing method of the cutter roll made from a carbon fiber reinforced plastic characterized by the above-mentioned . The method for producing a carbon fiber reinforced plastic cutter roll according to claim 1, further comprising a molding step of forming an outer surface shape of the carbon fiber layer by clamping between the laminating step and the curing step.   In the laminating step, the carbon fibers impregnated with the matrix resin are wound at about 90 degrees with respect to the axial direction and laminated, and then the carbon fibers impregnated with the matrix resin are wound at a certain angle with respect to the axial direction. The carbon fiber layer is formed by laminating and repeating a plurality of times the layer thus wound at approximately 90 degrees with respect to the axial direction and the layer wound at a certain angle. The manufacturing method of the cutter roll made from carbon fiber reinforced plastics of 2.   In the laminating step, the carbon fibers impregnated with the matrix resin are wound at a certain angle with respect to the axial direction and laminated, and then the carbon fibers impregnated with the matrix resin are wound at about 90 degrees with respect to the axial direction. The carbon fiber layer is formed by repeating a plurality of times of laminating and thus winding the layer wound at a certain angle with respect to the axial direction and the layer wound at about 90 degrees. The manufacturing method of the cutter roll made from carbon fiber reinforced plastics of 2.

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