JP3258449B2 - Method and apparatus for cutting a belt-shaped member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cutting a band-shaped member such as an unvulcanized rubber sheet, and more particularly, to a method for cutting a band-shaped member at a predetermined shallow angle. The present invention relates to a method and an apparatus for cutting a strip-shaped member.

[0002]

2. Description of the Related Art For example, in the process of manufacturing a tire, a long unvulcanized rubber sheet is cut into a predetermined length of rubber sheet, and the cut rubber sheet is wound around a drum and both ends thereof are pressed. There is a joining step. At this time, as shown in FIG. 8, both ends A1 and A2 of the cut rubber sheet A to be joined are inclined with respect to the thickness direction of the rubber sheet A in order to improve the uniformity and joining of the tire. To cut it.

[0003] Conventionally, as described above, a method for diagonally cutting a band-shaped member such as an unvulcanized rubber sheet includes the following.
For example, a method is known in which a cutter having a rotary blade is moved in the width direction of a band-shaped member to cut the band. In the case of this method, there is a limit in the cutting angle of the inclined surface formed in the cutting portion of the belt-shaped member, and there is a problem that it is difficult to form the cutting angle to a desired low angle.

As a solution to this problem, Japanese Patent Laid-Open Publication No.
As disclosed in Japanese Unexamined Patent Publication No. 2 (1999) -1995, there has been proposed a method in which a heated mold for forming and cutting is pressed in a width direction to a cut portion of the band-shaped member, and the cut portion of the band-shaped member is cut into a mold shape and cut at the same time. I have. However, this cutting method has a problem that when cutting a wide band-shaped member, there is a problem that a central portion of the band-shaped member or the like may not be cut sufficiently, and in order to solve the problem, a heated mold is required. There was a problem that the cutting device had to be pressed at a high pressure, the size of the cutting device was increased, and the end of the heated mold became significantly worn, thereby shortening the life of the mold.

[0005] Further, when the mold is separated from the band-shaped member after the band-shaped member is cut, the contact area between the band-shaped member and the mold is large, so that the cut surface of the band-shaped member tends to be wavy. Was.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to enable a wide band-shaped member to be easily cut with a small facility and effectively prevent the cut surface from becoming wavy. An object of the present invention is to provide a method and an apparatus for cutting a strip-shaped member that can perform the cutting.

[0007]

According to the present invention, there is provided a method for cutting a belt-like member, wherein the cutting portion of the belt-like member is sequentially pressed along a width direction while rotating a heating roll of an abacus ball. The cutting section of the band-shaped member is formed by a heating roll at a predetermined angle with respect to the longitudinal direction of the band-shaped member, and is molded and cut.

The strip-shaped member cutting device according to the present invention is a strip-shaped member cutting device that forms an inclined surface at a predetermined angle on a cut portion of the band-shaped member by using an aspherical heating roll, molds and cuts the band-shaped member, The heating roll is disposed rotatably, and is provided so as to be able to move up and down in the thickness direction of the band-shaped member and to be able to reciprocate along the width direction of the band-shaped member.

[0009]

According to the present invention, the belt-shaped member is formed in the width direction while being rotated while the aspheric spherical heating roll is rotated and cut at the same time, so that the contact area with the band-shaped member is small and the cut surface of the band-shaped member is heated. Adhesion to the roll is suppressed. Therefore, it is possible to effectively prevent the cut surface of the band-shaped member from becoming wavy due to the adhesion.

[0010] Further, since the strip is sequentially cut along the width direction by the heating roll, the problem that the center portion and the like of the wide strip are not sufficiently cut does not occur. However, it can be cut reliably and easily. Further, since the heating roll having a spherical shape of the abacus is rotated while being pressed against the cut portion of the band-shaped member, the pressing force against the band-shaped member can be reduced, and the equipment can be downsized.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic explanatory view showing an example of a cutting device used in the method for cutting a belt-shaped member according to the present invention. The cutting device D is used for cutting unvulcanized rubber sheets and the like conveyed on the conveyor belts 1 and 1. The frame 2 has a frame 2 erected in the width direction of the band-shaped member S.
The guide rails 3 are provided along the width direction. A cutting means 4 for cutting the band-shaped member S is suspended from the guide rails 3, 3, and the cutting means 4 is slidable along the guide rails 3, 3.

The cutting means 4 is arranged in the height direction (the thickness direction of the strip-shaped member S) of the support frame 5 suspended from the guide rails 3, 3.
Along the guide bar 6,6,
6 is a roll holding member 1 having a rotatable heating roll 9 mounted on a horizontally mounted shaft 7 via a bearing 8.
0 is engaged, and the roll holding member 10 is slidable along the guide bars 6 and 6.

The heating roll 9 has an abacus spherical shape, a surface 9a of the strip-shaped member S which contacts the cut portion S1 is formed at a desired molding angle α, and a heating means 9b such as an electric heater for heating the roll is provided inside. Have been. In addition, the support frame 5
An elevating cylinder 11 is mounted on the upper end of the cylinder. The tip of a piston rod 11a of the elevating cylinder 11 is connected to a roll holding member 10 so that the roll holding member 10 can be moved up and down along guide bars 6 and 6. .

The frame 2 has a hydraulic cylinder 12
The distal end of the piston rod 12a of the hydraulic cylinder 12 is connected to the support frame 5, as shown in FIG. 3, so that the support frame 5 can run in the width direction of the band-shaped member S by the operation of the hydraulic cylinder 12. Has become. Between the conveyor belts 1 and 1, a belt-shaped member S is heated by a heating roll 9.
When cutting is performed, a receiving table 13 for mounting the cutting portion S1 of the band-shaped member S is provided, and the receiving table 13 is configured to be vertically movable by a lifting cylinder 14. In addition,
The conveyor belts 1, 1, the lifting / lowering cylinders 11, 14, and the fluid pressure cylinder 12 are program-controlled in conjunction with each other by a control device (not shown).

The method for cutting a belt-shaped member according to the present invention can be carried out as follows using the above-described apparatus. First, when the cutting portion S1 of the belt-shaped member S conveyed on the conveyor belt 1 reaches the position of the cutting device D, the conveyor belt 1 stops. The lifting cylinder 14 is actuated to raise the pedestal 13 and abut the cutting portion S1 of the band-shaped member S. The lifting / lowering cylinder 11 is operated to activate the roll holding member 10.
To a position where the lower end 9b of the heating roll 9 reaches the lower surface of the belt-shaped member S.

Subsequently, the hydraulic cylinder 12 is operated. The cutting means 4 moves across the cutting portion S1 of the band-shaped member S in the width direction, and the heating roll 9 having the spherical shape of the abacus which moves in parallel with the band-shaped member S, as shown in FIG. Pressing while cutting section S1 in the width direction,
A surface S2 inclined at a predetermined angle α (FIG. 5) with respect to the longitudinal direction of the band-shaped member S is formed (molded) on the cut portion S1 of the band-shaped member S, and the band-shaped member S is cut in the width direction.

After the cutting, the fluid pressure cylinders 11, 14 and the lifting / lowering cylinder 12 are sequentially operated according to the program.
The cradle 13 and the heating roll 9 return to the original work start position. When the conveyor-side conveyor belt 1 on the conveying side operates to convey the cut band-shaped member S, the conveyor belt 1 descends and moves horizontally to the other conveyor belt 1 side to take off the cut end of the band-shaped member S. . While the conveyor belt 1 returns to the original position, the next cutting portion S1 of the belt-shaped member S
To the cutting position by the conveyor belts 1, 1. Then, the above-described cutting operation is repeated.

Therefore, the belt-shaped member S is shaped from the width direction and cut at the same time as the aspheric spherical heating roll 9 rotates, so that the contact area with the belt-shaped member S is small, and the cut surface of the belt-shaped member S adheres to the heating roll 9. And the cut surface of the band-shaped member S can be effectively prevented from being wavy. As a matter of course, a pressing jig conventionally used when the heating roll 9 is separated from the belt-shaped member S after cutting the belt-shaped member S is unnecessary. In addition, since the belt-shaped member S is sequentially cut in the width direction by the heating roll 9, the problem that the center portion and the like of the wide band-shaped member are not sufficiently cut does not occur, and even if the wide band-shaped member is used, Can be cut easily.

Further, since the heating roll 9 having the spherical shape of the abacus is sequentially pressed in the width direction to the cut portion S1 of the band-shaped member S while rotating, the pressing force on the band-shaped member S can be made smaller than in the prior art. Can also be reduced in size.
FIG. 6 shows another example of the method for cutting a belt-shaped member according to the present invention, in which a plurality of the abacus spherical heating rolls 9 are arranged linearly as shown in FIG. Cut section S1 of band-shaped member S by spherical heating rolls 9A, 9B, 9C
Is cut and molded step by step. The heating rolls 9A, 9B, and 9C have a configuration in which the diameter gradually increases by the cut amount.

That is, as shown in FIG. 6 (b), the cutting portion S1 of the band-shaped member S is formed by the top aspheric spherical heating roll 9A.
Is cut by a predetermined amount. Subsequently, as shown in FIG.
The trace cut by the heating roll 9A is further cut deep by the aspheric spherical heating roll 9B, and as shown in FIG. 6 (c), the final aspheric spherical heating roll 9C makes a predetermined angle to the cut portion S1 of the band-shaped member S. Is formed (molded), and the band-shaped member S is cut. Thus, even if the cutting portion S1 of the band-shaped member S is shaped and cut in a stepwise manner using the plurality of abacus spherical heating rolls 9A, 9B and 9C, the same effects as described above can be obtained and the shaping and cutting can be performed. Since the pressing force of the heating roll 9C against the belt-shaped member S at the time can be reduced, the heating roll 9C on the cut surface of the belt-shaped member S can be reduced.
And the waving of the cut surface of the band-shaped member S can be more effectively suppressed.

The cutting angle β of the surface of the aspheric spherical heating rolls 9A, 9B, 9C which comes into contact with the cut portion S1 of the belt-shaped member S is gradually increased to the desired shaping angle α as it goes toward the rear heating roll. Is preferred. FIG.
Shows still another example of the cutting method of the band-shaped member of the present invention,
After forming a slope at a predetermined angle on the cut portion S1 of the band-shaped member S by the above-mentioned abacus spherical heating roll 9 and performing only the molding, the cutting portion S1 of the band-shaped member S is cut by the cutting blade C. Things.

That is, as shown in FIG. 7A, the cut portion S1 of the belt-shaped member S conveyed on the conveyor belt is
The mold is sequentially formed at a predetermined angle in the width direction by the heating roll 9. Next, as shown in FIG. 7B, the cutting portion S1 of the band-shaped member S shaped by the cutting blade C is cut. The cutting method may be to sequentially cut in the width direction by a rotating round blade-shaped cutting blade C, or to lower the cutting blade C having a length traversing the band-shaped member S in the width direction to cut at once. However, the method is not particularly limited.

Even when the cutting portion S1 of the belt-shaped member S is formed by the aspheric spherical heating roll 9 and the cutting portion S1 is cut by the cutting blade C, the above-described effects can be obtained. Since the force for pressing the roll 9 can be further reduced, the adhesion of the cut surface of the band member S to the heating roll 9 can be further suppressed, and the waving of the cut surface of the band member S can be more effectively suppressed. is there.

In the above-mentioned cutting apparatus D, for example, when cutting an unvulcanized rubber sheet having a thickness of 2 mm, the dimensions of the heating roll 9 are as follows: the width x of the heating roll 9 is 70 mm; It can be. Further, instead of the cradle 13, a conveyor capable of sending out the cut band-shaped member S may be provided. In this case, it is not necessary to adopt a configuration in which the conveyor belt 1 on the transport side is lowered and horizontally moved.

The present invention is not limited to the embodiment described above. For example, the belt member S is conveyed by a conveyor belt, but the cutting device D can be moved along the longitudinal direction of the belt member S. The cut portion S1 of the belt-shaped member S
Can be configured to be cut, and the present invention can be implemented in other embodiments.

[0026]

As described above, according to the present invention, the belt-shaped member is formed in the width direction while being rotated while the aspheric spherical heating roll is being rotated, and at the same time, the contact area of the heating roll with the belt-shaped member is small. Adhesion of the surface to the heating roll is suppressed, and it is possible to effectively prevent the cut surface of the belt-shaped member from becoming wavy due to the adhesion.

Further, since the belt-shaped member is sequentially cut in the width direction by the heating roll, the problem that the center portion and the like of the wide band-shaped member are not sufficiently cut does not occur, and even if the wide band-shaped member is used. , And can be easily cut. Further, since the abacus spherical heating roll is rotated and pressed against the cut portion of the band-shaped member sequentially, the pressing force of the heating roll against the band-shaped member can be reduced,
Equipment can be miniaturized.

[Brief description of the drawings]

FIG. 1 is a schematic front explanatory view of a cutting device used in a method for cutting a band-shaped member of the present invention.

FIG. 2 is an enlarged half sectional view of the heating roll of FIG.

FIG. 3 is a partial side view showing a main part of FIG. 1;

FIG. 4 is an explanatory view showing a method for cutting a belt-shaped member of the present invention.

FIG. 5 is an explanatory view showing a state in which a cut portion of the belt-shaped member is molded at a predetermined angle α.

FIGS. 6A and 6B are explanatory views showing another example of the method for cutting a belt-shaped member of the present invention, wherein FIG. 6A is an explanatory view showing an arrangement of three heating rolls, and FIG. Explanatory drawing showing a state in which the cutting portion is cut, (c) is an explanatory diagram showing a state in which the next heating roll cuts the cutting portion of the band-shaped member, and (d) is a cutting diagram in which the last heating roll cuts the cutting portion of the band-shaped member. FIG. 4 is an explanatory diagram showing a state in which

FIGS. 7A and 7B are explanatory views showing still another example of the method for cutting a band-shaped member according to the present invention, wherein FIG. 7A is an explanatory view showing a state where a cut portion of the band-shaped member is molded by a heating roll, and FIG. It is explanatory drawing which shows the state which cut | disconnects the cutting part of a strip | belt-shaped member.

FIG. 8 is an explanatory cross-sectional view showing both ends to be joined of a cut unvulcanized rubber sheet in a tire manufacturing process.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Conveyor belt 4 Cutting means 9, 9A, 9B, 9C Heating roll 10 Roll holding member C Cutting blade D Cutting device S Band-shaped member S1 Cutting part

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Endo 2-1 Oiwake, Hiratsuka-shi, Kanagawa Yokohama Rubber Co., Ltd. Inside the Hiratsuka Factory (72) Inventor Mitsuo Tsuji 2-1 Oiwake, Hiratsuka-shi, Kanagawa Yokohama Rubber Co., Ltd. Hiratsuka Works (56) References JP-A-4-220332 (JP, A) JP-B-47-28627 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B26F 3/00 -3/16 B26D 3/00

Claims (4)

(57) [Claims] 1. While rotating a heating roll of an abacus spherical shape and sequentially pressing a cut portion of a band-shaped member along a width direction,
A method of cutting a band-shaped member, wherein a surface inclined at a predetermined angle with respect to a longitudinal direction of the band-shaped member is formed on a cut portion of the band-shaped member by the heating roll, followed by molding and cutting. 2. The method for cutting a strip-shaped member according to claim 1, wherein the cut portion of the strip-shaped member is formed and cut stepwise by the heating rolls in which a plurality of the rolls are arranged linearly. 3. While rotating the heating roll of the abacus spherical shape, pressing the cut portion of the belt-shaped member sequentially along the width direction,
A method of cutting a band-like member, wherein a surface inclined at a predetermined angle with respect to a longitudinal direction of the band-like member is formed on a cut portion of the band-like member by the heating roll, and the cut portion is cut. 4. An apparatus for cutting a band-shaped member, which forms an inclined surface at a predetermined angle on a cut portion of the band-shaped member with an abacus-shaped spherical heating roll, and forms and cuts the heating member, wherein the heating roll is rotatably disposed. In addition, a band-shaped member cutting device provided so as to be able to move up and down in the thickness direction of the band-shaped member and to be able to reciprocate along the width direction of the band-shaped member.