JP4514126B2 - Mold for cutter roll made of carbon fiber reinforced plastic - Google Patents

Description

TECHNICAL FIELD The present invention relates to a carbon fiber reinforced plastic cutter roll forming die in a rotary cutter device that continuously cuts long paper or paperboard into a predetermined length.

  Conventionally, a rotary cutter device is used to continuously cut long paper or paperboard into a predetermined length. The rotary cutter device is composed of a cutter roll having a knife attached thereto and a bottom roll facing the cutter roll and having a parallel rotation axis, and paper or paperboard is interposed between the cutter roll and the bottom roll driven by a driving device. It cuts by passing. Examples of these rotary cutter devices include those described in Japanese Patent Application Laid-Open No. 11-123694 or Japanese Patent No. 2981405.

In these rotary cutter devices, the outer peripheral surface of the bottom roll is formed of a hard metal that is not easily worn even when the cutter blade hits it, and does not leave uncut paper on the paper to be cut. 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.
JP 11-123694 A Japanese Patent No. 2981405

  As described above, since the cutter roll is formed of a hard metal, the weight becomes very heavy and the deflection of the entire roll increases. Moreover, when it becomes heavier, the moment of inertia (GD2) also increases, and a very large energy is required for driving. Further, when the moment of inertia (GD2) increases, there is a problem that the line speed cannot be increased.

The present invention has been made in view of the present situation, and an object of the present invention is to provide a carbon fiber reinforced plastic cutter roll mold that is light in weight and therefore has a small moment of inertia (GD2) . It is another object of the present invention to provide a carbon fiber reinforced plastic cutter roll mold that can reduce driving energy and increase line speed.

In order to achieve the above object, the present invention is configured as follows. That is, the carbon fiber reinforced plastic cutter mold roll according to the present invention is composed of a pressing mold for fixing the Rumandoreru and mandrel wound carbon fibers impregnated with a matrix resin, the mandrel, the cutter roll for molding The both ends of the main body formed in the same outer shape as the outer shape are provided with journals having holes for fixing to the pressing mold, and the pressing mold is laminated by winding carbon fibers around the main body of the mandrel. It consists of two pressing plates that press the laminated body from opposite sides, and a connecting plate that fixes the pressing plate and the mandrel. Bolt insertion holes for fixing the connecting plate are drilled at both ends of the pressing plate. The connecting plate is divided into two divided pieces, and a concave portion for holding the journal is provided on each butt surface, and the upper and lower surfaces of the divided pieces are provided. Is provided with a screw hole for screwing a bolt inserted through the bolt insertion hole, and one of the divided pieces is provided with a through hole penetrating from the butted surface to the opposite side surface, and the other divided piece. A screw hole for screwing a bolt inserted from the through hole is formed on the abutting surface, and a pin to be inserted into the hole of the journal is projected on the concave portion of one of the divided pieces. Features.

  At least one of the two pressing plates may be formed to have a concave cross section by providing ribs on both side end portions of the long plate, and both the two pressing plates have both side end portions of the long plate. A rib may be erected to form a concave cross section.

In order to manufacture a cutter roll made of carbon fiber reinforced plastic using the mold , carbon fibers are laminated on the outer surface of a mandrel while being impregnated with a matrix resin, or carbon fibers are impregnated with a matrix resin. prepregs were laminated wound, following Ide, heated and cured, polished after cooling surface, attached to the journal at both ends of the roll body of the hollow structure was withdrawn mandrel, the surface may be Kere Attach the cutter blade . When laminating carbon fibers, the carbon fibers impregnated with the matrix resin are wound around and laminated at about 90 degrees with respect to the axial direction, and then the carbon fibers impregnated with the matrix resin are fixed at an angle with respect to the axial direction. It is preferable that the layer wound around the axis direction and the layer wound at about 90 degrees with respect to the axial direction and the layer wound at a certain angle are repeatedly laminated a plurality of times. Further, in the laminating step, the carbon fibers impregnated with the matrix resin are laminated at a certain angle with respect to the axial direction, and then the carbon fibers impregnated with the matrix resin are wound and laminated at about 90 degrees. A carbon fiber layer may be formed by repeating a plurality of layers wound at a certain angle with respect to the axial direction and a layer wound at approximately 90 degrees. The wall thickness of the carbon fiber layer of the roll body is 35 to 55 mm, preferably 40 to 48 mm.

Since the carbon fiber reinforced plastic cutter roll according to the present invention is lightweight and has a small moment of inertia (GD2), a small amount of drive energy is required and a running cost can be reduced. In addition, since it is lightweight and has a small moment of inertia (GD2), it is possible to increase the speed by increasing the line speed.
Also, according to the carbon fiber reinforced plastic cutter roll mold according to the present invention, the mandrel is extracted after heat-curing to obtain a hollow structure roll body. The body can be manufactured.

Below, the embodiment of the cutter roll shape | molded by the shaping | molding die for carbon fiber reinforced plastics cutter rolls concerning this invention is described in detail. As shown in FIGS. 1 and 2, the cutter roll 1 has journals 5 attached to both ends of a roll body 4 in which the inside of a carbon fiber layer 2 wound and laminated while impregnated with a matrix resin is a hollow 3, A cutter blade 6 is attached to the surface of the roll body 4 in the axial direction. In this embodiment, the roll main body 4 having a substantially oval cross section in which the flat surface portion 7 is provided in parallel to the axial direction on the roll surface has been described, but the cross sectional shape of the roll main body can be variously modified. For example, in addition to a circular cross section, the cross section may be a regular triangle, a square, or a regular pentagon. In this case, the cutter blade 6 is attached to the position of the apex in the cross section.

  The carbon fiber layer 2 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 2 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 at about 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 7a and 7b are fixed on the outer peripheral surface of the roll body 4 so as to face each other, and a cutter blade 6 is interposed between the cutter holders 7a and 7b. It can be set as an attachment structure. In this case, it is preferable that the pair of substantially L-shaped cutter holders 7 a and 7 b are bonded to the outer peripheral surface of the roll body 4 using an adhesive and fixed with bolts 9. Not only the bolts 9 but also an adhesive can be used to fix them more firmly and reduce the number of bolts 9.

Next, the manufacturing method of the cutter roll by the carbon fiber reinforced plastic cutter roll mold according to the present invention will be described in detail. As shown in FIG. 3 , the cutter roll is manufactured by laminating a carbon fiber impregnated with a matrix resin to form a carbon fiber layer 2, and a molding process 20 for adjusting the shape of the outer peripheral surface of the roll body. , A curing step 30 using a heating furnace, a polishing step 40 for smoothing the surface, and a cutter blade attaching step 50.

  In the lamination process 10, first, a mandrel 11 corresponding to the outer surface shape of the roll body is prepared. FIG. 4 shows a mandrel 11 for forming the roll body 4 shown in FIGS. 1 and 2, and flat portions 11a and 11a are provided in parallel to the axial direction, and the flat portion 11a and 11a are provided on the journal 11b. Is formed with a hole 11c for fixing a pressing die to be described later. The mandrel 11 configured as described above has an outer diameter of 190 mm and a length of 1500 mm. 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 pulled out from the bobbin 12 and wound around the mandrel 11 while being impregnated with the resin by the matrix resin impregnation device 13. The bobbins 12 are arranged in five rows and three stages, and the carbon fibers are pulled out by a pair of pulling rolls 14 and combined into one. In this embodiment, diamond lead K63712 (trade name) manufactured by Mitsubishi Chemical Corporation, which is pitch-based carbon fiber, was used as the carbon fiber. As shown in FIG. 5, the matrix resin impregnating apparatus 13 is configured by disposing an adhesion roll 13b that immerses the resin in the resin tank 13a to less than half of the diameter, preferably about one third. Has been.

Between the matrix resin impregnation apparatus 13 and the mandrel 11, a pressing roll 15 and a guide roll 16 for pressing the carbon fiber against the adhesion roll 13b are disposed. The resin in the resin tank 13a contains 115 parts by weight of Araldite HY917 (trade name) as a curing agent for 100 parts by weight of Araldite CY179 (trade name) manufactured by Huntsman Advanced Materials as an epoxy resin for electrical insulation. As an accelerator, a mixture of 0.8 part by weight of Araldite DY070 (trade name) was used.
As the matrix resin, in addition to the epoxy resin, phenol resin, unsaturated polyester resin, or the like can be used.

  With the above configuration, the carbon fiber drawn out from the bobbin 12 is drawn out by the drawing roll 14 and wound around the mandrel 11 while being in contact with the adhesion roll 13b. The adhering roll 13b rotates in synchronism with the winding speed of the carbon fiber and adheres the resin in the resin tank 13a. The winding of the carbon fiber around the mandrel 11 was performed 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 tilted 12 degrees with respect to the axial direction is wound on the 4 ply. The third step is the same as the second step, and the fourth step is 90 degrees with respect to the axial direction. Four plies were wound in the direction, and a helical ply that was inclined 15 degrees with respect to the axial direction was wound on the four plies. In this way, an intermediate roll body 1a having a carbon fiber layer was obtained. The outer diameter of the intermediate roll 1a was 282 mm. In this case, the carbon fibers may be first wound and laminated with a certain angle with respect to the axial direction, and then the carbon fibers may be wound and laminated at about 90 degrees with respect to the axial direction. Since the resistance when pulling out the mandrel 11 from the intermediate roll body 1a is smaller when the fibers are wound and laminated at about 90 degrees with respect to the axial direction, there is no possibility that the carbon fibers in contact with the mandrel 11 are bent.

  In the next molding step 20, in order to mold the flat portions 11a and 11a in parallel, a pressing die 21 shown in FIGS. 6 and 7 was used. Note that the pressing die 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 a mandrel journal. The pressing plates 22 and 22 are concave in cross section in which ribs 22b and 22b are erected at right angles at both ends of the long plate 22a, and long holes 22c for inserting bolts are formed at both ends of the long plate 22a. Has been. On the other hand, the connecting plate 23 includes a divided piece 23a and a divided piece 23b that are divided into two parts, and a recess 24 for holding the journal 11b is provided on the abutting surface of each divided piece.

  The upper and lower surfaces of the divided pieces 23a and 23b are formed with screw holes 25 that are screwed with bolts, and the side surfaces of the divided pieces 23a are provided with through holes 26 that penetrate the opposite butted surfaces. A pin 27 to be inserted into the hole 11c of the journal 11b protrudes from the concave portion 24 of one divided piece 23b, and a screw hole 28 for screwing a bolt is formed in a surface facing the through hole 26. Yes.

  In order to use the pressing die 21 having the above configuration, the pin 27 of the divided piece 23b is fitted into the hole 11c of the journal 11b, the divided piece 23a is abutted against the divided piece 23b, the journal 11b is held by the recess 24, and the bolt 29a Are inserted into the through-hole 26 and the tip end portion is screwed into the screw hole 28 to assemble them integrally. Since the pin 27 is fitted in the hole 11c of the journal 11b, 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 29 b may be inserted from the long holes 22 c at both ends, and screwed into the screw holes 25 to be tightened. Since the pressing plate 22 is fixed in parallel to the connecting plate 23, and the connecting plate 23 itself does not rotate, a flat portion parallel to the surface of the intermediate roll body 1a can be molded.

  In the curing step 30, the intermediate roll body 1 a clamped by the pressing die 21 is cured by the heat curing furnace 31. Curing in the heating and curing furnace 31 is raised to 80 ° C. over about 1 hour and heated for about 4 hours, then further heated to 140 ° C. over 1 hour and heated for about 4 hours, and then taken out from the heating and curing furnace 31. Naturally cooled. After cooling, the pressing die was removed to obtain an intermediate roll body 1a.

  Next, the intermediate roll body 1 a is moved to the polishing step 40. Since the surface of the intermediate roll body 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. In the embodiment, an epoxy resin was coated. While the bending elastic modulus required for this type of cutter roll is 200 GPa, the bending elastic modulus of the roll body 4 obtained by the carbon fiber reinforced plastic cutter roll manufacturing method according to the present invention is 220 GPa. It was.

  Finally, the cutter blade 6 may be attached in the cutter blade attaching step 50. In the cutter blade attaching step 50, 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 the sectional view on the AA line of FIG. It is explanatory drawing which shows a manufacturing process. It is a perspective view of a mandrel. It is explanatory drawing which shows the lamination process in a manufacturing process. It is a side view which shows the assembly state of the press die in a formation process. It is a perspective view which shows the state which the press die in the molding process decomposed | disassembled.

1: Cutter roll 2: Carbon fiber layer 3: Hollow 4: Roll body 5: Journal 6: Cutter blade 7a, 7b: Cutter holder 9: Bolt 10: Lamination process 11: Mandrel 11b: Journal 11c: Hole 12: Bobbin 13 : Matrix resin impregnation device 14: Drawer roll 15: Pressing roll 16: Guide roll 20: Molding process 21: Pressing die 22: Pressing plate 23: Connecting plate 30: Curing process 40: Polishing process 50: Cutter blade mounting process

Claims (3)

It consists of a pressing mold for fixing the Rumandoreru and mandrel wound carbon fibers impregnated with a matrix resin, the mandrel, the end faces of the body that is formed to the outer shape of the outer and the same shape of the cutter roll forming, stamping die A journal having a hole for fixing to the body, and the pressing die includes two pressing plates for pressing a laminated body in which carbon fibers are wound around a mandrel body and stacked, and the pressing plate. It consists of a connecting plate that fixes the mandrel. Bolt insertion holes that are fixed to the connecting plate are drilled at both ends of the pressing plate, and the connecting plate is divided into two divided pieces, each on the butting surface Is provided with a recess for holding the journal, and screw holes for screwing the bolts inserted through the bolt insertion holes are formed on the upper and lower surfaces of the divided pieces. The one split piece is provided with a through hole penetrating from the abutting surface to the opposite side surface, and the other split piece abutting surface is provided with a screw hole for screwing a bolt inserted from the through hole. And a molding die for a cutter roll made of carbon fiber reinforced plastic, characterized in that a pin to be inserted into the hole of the journal is projected in the concave portion of one of the divided pieces . 2. The carbon fiber reinforced plastic according to claim 1, wherein at least one of the two pressing plates is formed in a concave cross section with ribs provided on both side ends of the long plate. Mold for cutter roll. The mold for a cutter roll made of carbon fiber reinforced plastic according to claim 1, wherein the two pressing plates are formed in a cross-sectional concave shape by standing ribs on both side ends of the long plate.

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