JP6412418B2 - Edge strip manufacturing apparatus and method, and cutting apparatus - Google Patents

Description

  The present invention relates to an edge strip manufacturing apparatus and manufacturing method for manufacturing a strip-shaped edge strip by cutting a sheet-like rubber material into a predetermined width, and a cutting apparatus used in the manufacturing method.

  In the manufacturing process of a pneumatic tire, various rubber materials formed by coating a cord material with rubber, such as a breaker, a ply, and a steel filler, are used.

  In order to prevent the occurrence of so-called loose where the cord material and the rubber are broken due to peeling or the like at the edge portions of these rubber materials, an edge strip is attached so as to wrap around the edge portions (for example, Patent Documents 1 and 2). And by affixing such an edge strip, the distortion which generate | occur | produces in an edge part can be suppressed and the durability of a tire can be improved.

  The above-mentioned edge strip is manufactured by combining a sheet-like rubber material that has been extruded and rolled, and a polyliner auxiliary material such as a polyethylene film that has been subjected to a peeling process, to produce an adhesive material, and then using a cutting device. Manufactured by cutting to a predetermined width.

  FIG. 6 is a side view schematically showing a conventional cutting apparatus. As shown in FIG. 6, the cutting apparatus 100 includes a cutting board 102 and a cutter 103 that are arranged to face each other with the adhesion material 22 being conveyed in between, and the tip of the cutter 103 is in contact with the cutting board 102. Thus, the contact material 22 in which the rubber material and the polyliner auxiliary material are in close contact with each other is sent in the conveying direction indicated by the arrow, whereby the contact material 22 is cut into a predetermined width by the cutter 103, and the edge strip 23 is manufactured.

JP 2004-217817 A JP 2011-213861 A

  However, the above-described conventional cutting apparatus 100 cuts the adhesive material 22 at the tip of the cutter 103 as shown in FIG. 6, and the cutter 103 and the adhesive material 22 are in contact with each other at a point. Since the liner auxiliary material is contained, the shape of the edge strip 23 after cutting may be unstable.

  Specifically, the adhesive material 22 is likely to be wrinkled during cutting, and the width of the cut edge strip 23 is likely to vary, so that the shape of the edge strip 23 becomes unstable.

  Further, since the cutter 103 is cut at one point in contact with the adhesion material 22, the blade of the cutter 103 is also easily worn, and there is a problem that the life of the cutter 103 is shortened.

  Then, this invention makes it a subject to provide the manufacturing technology of the edge strip which can suppress the abrasion of the blade of a cutter while stabilizing the shape of the edge strip after cut | disconnecting contact | adherence material.

The invention described in claim 1
It is a cutting device used when manufacturing an edge strip by cutting a predetermined width while conveying a contact material in which a rolled rubber material and a polyliner auxiliary material are in close contact with each other along a transport path,
It is equipped with a cutting board and a cutter that are arranged to face each other with the adhesion material being conveyed in between,
A recess is formed in the cutting board, and the tip of the cutter is configured to pass through the adhesion material and protrude into the recess of the cutting board ,
The cutting device according to claim 1, wherein a width dimension of the concave portion of the cutting board in the conveyance direction of the adhesion material is 30 to 70 mm .

The invention described in claim 2
The cutting device according to claim 1 , wherein a spacer set portion for setting a height adjusting spacer is provided on a bottom surface of the concave portion.

The invention according to claim 3
A rolling process for rolling unvulcanized rubber into a sheet-like rubber material;
An adhesion process for producing an adhesion material by closely adhering a polyliner auxiliary material to the rolled sheet-like rubber material;
A transporting process for transporting the closely contacted adhesive material to the cutting device according to claim 1 or 2 ,
A cutting step of manufacturing an edge strip by projecting a tip of a cutter of the cutting device into a recess of a cutting board of the cutting device, and cutting the contact material into a predetermined width;
And a winding step for winding the manufactured edge strip.

The invention according to claim 4
4. The method of manufacturing an edge strip according to claim 3 , wherein the edge strip is a breaker edge strip.

The invention described in claim 5
The edge strip manufacturing method according to claim 3 or 4 , wherein a height adjusting spacer is set in the recess.

The invention described in claim 6
A manufacturing apparatus of an edge strip used in the method for producing an edge strip according to any one of claims 3 to 5,
Rolling means for rolling unvulcanized rubber into a sheet-like rubber material;
An adhesion means for producing an adhesion material by closely adhering a polyliner auxiliary material to the rolled sheet-like rubber material;
A transporting process for transporting the adhered adhesive material;
A cutting device for producing an edge strip by projecting the tip of the cutter into a concave portion of a cutting board and cutting the conveyed adhesive material into a predetermined width;
An edge strip manufacturing apparatus comprising winding means for winding an edge strip manufactured by cutting to a predetermined width.

  According to the present invention, it is possible to provide an edge strip manufacturing technique capable of stabilizing the shape of the edge strip after cutting the adhesive material and suppressing the abrasion of the cutter blade.

It is the schematic which shows the manufacturing apparatus of the edge strip using the cutting device which concerns on one embodiment of this invention. It is a side view which shows typically the cutting device which concerns on one embodiment of this invention. It is a side view which shows typically the cutting board of the cutting device which concerns on one embodiment of this invention. It is a side view which shows typically the cutting device which concerns on other embodiment of this invention. It is a figure which shows the cross-section of a pneumatic tire. It is sectional drawing which shows the conventional cutting device.

  Hereinafter, the present invention will be described based on embodiments with reference to the drawings.

1. Edge Strip Manufacturing Apparatus and Manufacturing Method First, an edge strip manufacturing apparatus and manufacturing method using the cutting apparatus according to the present embodiment will be described. FIG. 1 is a schematic view showing an edge strip manufacturing apparatus using the cutting apparatus according to the present embodiment.

  As shown in FIG. 1, the edge strip manufacturing apparatus 1 includes a rubber supply unit 2, an extruder 3, a calendar unit 5, a polyliner supply unit 6, a cooling drum unit 7, and the like. A festoon 8, a cutting device 10, and a take-up roll 9 are provided.

  The manufacturing apparatus 1 first manufactures a sheet-like rubber material 20 by extruding an unvulcanized rubber supplied from a rubber supply unit 2 with an extruder 3 and rolling the unvulcanized rubber with a calendar unit 5. Then, in the cooling drum section 7 also used as a close contact means, the polyliner auxiliary material 21 supplied from the polyliner supply section 6 is brought into close contact with the sheet-like rubber material 20 to manufacture the close contact material 22 and cooled in the festoon 8. After that, it is conveyed to the cutting device 10.

  Then, by using the cutting device 10 in which the cutter 26 is attached to the cutter base 25, a plurality of strip-shaped edge strips 23 are manufactured by cutting the contact material 22 into a predetermined width and wound on the winding roll 9. .

2. Hereinafter, the cutting apparatus 10 according to the present embodiment provided in the manufacturing apparatus 1 described above will be specifically described.

  FIG. 2 is a side view schematically showing the cutting device according to the present embodiment. As shown in FIG. 2, in the cutting device 10 according to the present embodiment, the cutting board 11 and the cutter 26 are arranged to face each other with the adhesion material 22 being conveyed therebetween. Specifically, the cutting board 11 is disposed below the adhesive material 22 and the cutter 26 is disposed above. A plurality of cutters 26 are provided at predetermined intervals in the width direction of the adhesive material 22.

  The cutting device 10 according to the present embodiment is characterized in that the tip end portion 26b of the cutter 26 is configured to protrude toward the cutting board 11 side from the adhesive material 22. Specifically, a recess 11a is formed in the upper part of the cutting board 11, and the tip of the cutter 26 is placed in the recess 11a below the adhesive material 22 so that the tip 26b of the cutter 26 contacts the bottom surface of the recess 11a. 26b is projected.

  Thereby, the adhesion material 22 can be cut at an intermediate portion of the blade 26 a of the cutter 26. As a result, unlike the conventional cutting device that cuts the adhesive material at the tip of the cutter, the generation of wrinkles of the adhesive material 22 during cutting and the occurrence of variations in the width dimension of the edge strip 23 after cutting are appropriately suppressed. The shape of the edge strip 23 after cutting can be stabilized. Further, by cutting the contact material 22 at the intermediate portion of the blade 26a, the wear of the tip portion 26b of the cutter 26 can be appropriately suppressed.

  In addition, from the viewpoint of facilitating replacement of the cutter 26 and more appropriately preventing wrinkles, the width A of the recess 11a of the cutting board 11 in the transport direction X of the adhesion material 22 is 30 to 70 mm. Is preferred (see FIG. 3).

  Specifically, when the width A of the recess 11a is less than 30 mm, the cutter base 25 (see FIG. 1) is rotated to take out the tip 26b of the cutter 26 from the recess 11a and replace the cutter 26. When the blade 26 is swung in the direction X in which the adhesive material is conveyed, the cutter 26 comes into contact with the cutting board 11 and it becomes difficult to replace the cutter 26.

  On the other hand, when the width dimension A of the concave portion 11a is 70 mm or more, the adhesive material 22 being transported falls into the concave portion 11a, so that the adhesive material 22 may be wrinkled or bent. Further, when the adhesive material 22 falls into the recess 11a, the cutting is performed at the tip 26b of the cutter 26, which causes the wear of the tip 26b of the cutter 26 and the shape instability of the cut edge strip. There is a risk of inviting.

  Moreover, it is preferable that the recessed part 11a of the cutting board 11 is comprised so that the spacer 28 for height adjustment of predetermined thickness can be set to a bottom face, as shown in FIG. By setting the spacer 28 on the bottom surface of the recess 11a, it is possible to increase the position where the tip 26b of the cutter 26 is brought into contact with. Therefore, when the blade 26a of the cutter 26 is worn, Instead, the adhesive material 22 can be cut at a portion of the blade 26a that is not worn.

  In addition, the thickness of the preferable edge strip 23 in this Embodiment is about 0.5-1 mm, and the thickness of the polyliner auxiliary material 21 is about 0.2 mm.

  Moreover, the edge strip manufactured by the above-described embodiment is used for a pneumatic tire T as shown in FIG. 5, for example. 5, 51 is a cap rubber, 52 is a base rubber, 53 is an under tread, 54 to 57 are steel breakers, 58 is a breaker edge strip, 59 is a breaker cushion, 60 is an inner liner, 61 is an installation, 62 is an outer Side wall, 63 is steel case, 64 is side wall packing, 65 is inner side wall, 66 is ply edge strip, 67 is filler edge strip, 68 is ply / filler strip, 69 is steel filler, 70 is bead apex , 71 is a bead, and 72 is a rubber chafer.

  In the pneumatic tire shown in FIG. 5, a breaker edge strip 58, a ply edge strip 66, and a filler edge strip 67 are used as edge strips. Of these edge strips, the cutting device according to the above-described embodiment is attached so as to wrap the edge portions of the second and third steel breakers 55 and 56 from the bottom among the steel breakers 54 to 57. The above-described effects can be exhibited particularly significantly in the manufacture of the breaker edge strip 58.

  Hereinafter, the present invention will be described based on examples.

1. Examples 1 and 2 and Comparative Example (1) Example 1
In the edge strip manufacturing apparatus 1 as shown in FIG. 1, a sheet-like adhesive material 22 (25 mm in width) obtained by laminating a sheet-like rubber material 20 having a thickness of 0.8 mm and a polyliner auxiliary material 21 having a thickness of 0.17 mm. 4 is used, and the sheet-like adhesive material 22 is cut at intervals of 100 mm using a cutting device in which the recess 11a is formed on the cutting board 11 as shown in FIG. A strip 23 was produced. In addition, the width dimension A (refer FIG. 3) of the recessed part 11a was set to 40 mm.

(2) Example 2
When a cutting device as shown in FIG. 4 is used, when the blade 26a of the cutter 26 is worn, the spacer 28 is set on the bottom surface of the recess 11a, and the portion where the blade 26a of the cutter 26 contacts the adhesive material 22 is appropriately changed. Except for this, an edge strip 23 was produced under the same conditions as in Example 1.

(3) Comparative Example An edge strip 23 was produced under the same conditions as in Example 1 except that a conventional cutting device 100 as shown in FIG. 6 was used.

2. Evaluation (1) Width accuracy Measure the width of the produced edge strip every 10m, and if it was cut within ± 0.5mm of the target width, it will be "Yes", otherwise it will be "No" evaluated.

(2) Frequency of trouble occurrence Count the number of trouble occurrences that wrinkles occur in the adhesive material being cut during production. If the average number of trouble occurrences per day is within one, “good”, 2 The case of 4 times was evaluated as “possible” and the case of 5 times or more was evaluated as “impossible”.

(3) Blade life Count the number of times the cutter needs to be replaced due to wear of the blade during fabrication. If the average number of cutter replacements per day is within 0.2, “good”, 0 The case of 3 times or more and less than 10.0 times was evaluated as “possible”, and the case of 10.0 times or more was evaluated as “impossible”.

  Table 1 shows the results of the above evaluations.

  From Table 1, in both Example 1 and Example 2, an edge strip with high width accuracy was produced, and generation of wrinkles of the adhesive material during cutting was suppressed, so that a cutting board in which a recess was formed It was confirmed that the shape of the edge strip after cutting can be stabilized by using.

  Further, in both Example 1 and Example 2, the life of the cutter was extended as compared with the comparative example, but in Example 2 in which the spacer was set on the bottom surface of the recess, the life of the cutter was significantly increased. It was confirmed that

  While the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments. Various modifications can be made to the above-described embodiment within the same and equivalent scope as the present invention.

DESCRIPTION OF SYMBOLS 1 Edge strip manufacturing apparatus 2 Rubber supply part 3 Extruder 5 Calender part 6 Polyliner supply part 7 Cooling drum part 8 Festoon 9 Winding roll 10, 100 Cutting apparatus 11, 102 Cutting board 11a Recess 20 Sheet-like rubber material 21 Poly Liner auxiliary material 22 Adhesive material 23 Edge strip 25 Cutter base 26, 103 Cutter 26a Cutter blade 26b Cutter tip 28 Spacer 51 Cap rubber 52 Base rubber 53 Under tread 54-57 Steel breaker 58 Breaker edge strip 59 Breaker cushion 60 Inner Liner 61 Installation 62 Outer side wall 63 Steel case 64 Side wall packing 65 Inner side wall 66 Ply edge strip 7 transport direction of the filler edge strip 68 plies / filler between the strips 69 steel filler 70 the bead apex 71 bead 72 rubber chafer A width of the recess T tire X adhesion material

Claims (6)

It is a cutting device used when manufacturing an edge strip by cutting a predetermined width while conveying a contact material in which a rolled rubber material and a polyliner auxiliary material are in close contact with each other along a transport path,
It is equipped with a cutting board and a cutter that are arranged to face each other with the adhesion material being conveyed in between,
A recess is formed in the cutting board, and the tip of the cutter is configured to pass through the adhesion material and protrude into the recess of the cutting board ,
The cutting device, wherein a width dimension of a concave portion of the cutting board in a conveyance direction of the adhesion material is 30 to 70 mm . The cutting apparatus according to claim 1 , wherein a spacer set portion for setting a height adjusting spacer is provided on a bottom surface of the concave portion. A rolling process for rolling unvulcanized rubber into a sheet-like rubber material;
An adhesion process for producing an adhesion material by closely adhering a polyliner auxiliary material to the rolled sheet-like rubber material;
A transporting process for transporting the closely contacted adhesive material to the cutting device according to claim 1 or 2 ,
A cutting step of manufacturing an edge strip by projecting a tip of a cutter of the cutting device into a recess of a cutting board of the cutting device, and cutting the contact material into a predetermined width;
And a winding step for winding the manufactured edge strip. The method of manufacturing an edge strip according to claim 3 , wherein the edge strip is a breaker edge strip. Method for producing an edge strip according to claim 3 or claim 4, characterized in that setting the spacer for height adjustment to said recess. A manufacturing apparatus of an edge strip used in the method for producing an edge strip according to any one of claims 3 to 5,
Rolling means for rolling unvulcanized rubber into a sheet-like rubber material;
An adhesion means for producing an adhesion material by closely adhering a polyliner auxiliary material to the rolled sheet-like rubber material;
A transporting process for transporting the adhered adhesive material;
A cutting device for producing an edge strip by projecting the tip of the cutter into a concave portion of a cutting board and cutting the conveyed adhesive material into a predetermined width;
An edge strip manufacturing apparatus comprising winding means for winding an edge strip manufactured by cutting to a predetermined width.

Images