JP5536372B2 - Rubber sheet manufacturing apparatus and manufacturing method - Google Patents

Description

  The present invention relates to a manufacturing apparatus and a manufacturing method for manufacturing a rubber sheet reinforced with an untwisted metal wire or an inorganic synthetic fiber cord.

In recent years, for example, in order to improve the fuel efficiency of automobiles, there is an increasing demand for weight reduction of tires. Steel cords for belt reinforcement have attracted attention as a means of weight reduction. For example, pneumatic radial tires using a reinforcement belt with a non-twisted metal wire are known for weight reduction of tires (patents) Reference 1).
In this pneumatic radial tire, for at least one belt ply of the belt layer, at least most of the metal wires in the ply are circular in cross section, and a plurality of metal wires having substantially the same wire diameter are arranged in parallel without being twisted together. Are used, and the metal wire bundles are arranged in a plane parallel to each other with a space between the bundles in the width direction to form a belt layer. Therefore, since the belt layer can be thinned by reducing the amount of covering rubber, the weight of the tire can be reduced. However, when using untwisted cords in this way, it is necessary that the untwisted cords be bundled in bundles so as not to impair the performance of the tire.
However, Patent Document 1 does not describe a method for forming a rubber sheet by bundling untwisted metal wires and topping rubber.

  In addition, as an apparatus for manufacturing a rubber tape with a reinforcing cord, for example, as shown in FIG. 7, a rubber coating head 102 having a plurality of die holes 101 and a pair of rolling rollers 103 are provided, and the plurality of cords 104 are rubber-coated. It is known that after being introduced into the head 102, it is drawn out from the die hole 101 in a state of being arranged as a rubber-coated cord 105, and is formed into a tape shape by passing between the rolling rollers 103 to obtain a rubber sheet 106. (See Patent Document 2).

In the manufacturing apparatus of the rubber tape with the reinforcing cord, the cord interval at the end portion in the width direction of the rubber sheet 106 may be wider than the central portion and the interval may vary. Therefore, the die hole pitch at both ends of the die hole group of the rubber-coated head is formed so as to be smaller than the die hole pitch at the center part of the die hole group, thereby obtaining a rubber sheet having a uniform cord interval. .
However, since this method can be applied only when a rubber sheet is formed using a rubber-coated head, not only the application range is limited, but also a simple or general method because pitch processing of the die holes is required. I can't say that.

  Further, Patent Document 3 discloses a guide in which a tire cord is guided in the vicinity of one of a pair of calendar devices in order to suppress cord disturbance when an array of organic fiber tire cords without weft is rubber-topped. There is described a tire cord topping device that is provided with a grooved roller having a groove recessed in the outer peripheral surface, and presses the tire cord together with the grooved roller against a rubber sheet on a calendar device. In this topping device, the groove depth of the guide groove is 1.0 to 1.2 times the diameter of the tire cord, and the distance between the grooved roller and the calendar device is 0.2 to 1.0 mm. Has been.

  However, in this topping device, the gaps between the cords are prevented from being disturbed by using a grooved roller. However, it is possible to guide the bundled cords bundled in a bundle and prevent the gaps between the bundled cords from being disturbed. Is not considered at all.

Japanese Patent Laid-Open No. 2002-2221 Japanese Patent Laid-Open No. 2008-30211 JP 2004-330450 A

  The present invention has been made in order to solve the above-described conventional problems, and an object of the present invention is to form a bundled cord composed of untwisted cords in which a plurality of cords are arranged in parallel with each other, and each bundle. It is to produce a rubber sheet with a non-twisted cord in which the interval between the cords is made uniform and the interval between the bundled cords is not disturbed.

(1) The present invention is an apparatus for manufacturing a rubber sheet with a cord by topping rubber supplied to a cord supplied from a cord supply device, wherein the supplied cords are horizontally arranged and bundled for a plurality of cords. A guide means is provided for forming a twisted bundle cord and guiding the position of the bundle cord so that the distance between the bundle cords is constant, and adjusting the position in the vertical direction to adjust the winding angle of the bundle cord. a first guide roller to be adjusted bundle by a rolling means for topping rubber in a bundle code fed from the first guide roller, positioned in the vicinity of the rolling means, aligning in the vertical direction possess a second guide roller for adjusting the angle of wrap of Jo code, and a first guide roller, said second guide roller, said rolling means, the feed direction of the respective bundle code It is a manufacturing apparatus of cords rubber sheet, characterized in that are arranged in a straight line.
(2) The present invention is a manufacturing apparatus for a rubber sheet of the above (1), before Symbol guide means deep continuous guide groove than the diameter of the cord is provided around the circumference of the first and second guide rollers In addition, the rubber sheet manufacturing apparatus is characterized in that a winding angle of the bundle cord with respect to the first and second guide rollers is within 90 degrees.
( 3 ) The present invention is a method of manufacturing a rubber sheet by topping rubber on a non-twisted cord, and a plurality of the cords supplied from a cord supply device are horizontally aligned by a first guide roller and bundled Forming a cord and controlling the position so that the spacing between the bundle cords of the plurality of bundle cords formed is constant , and adjusting the position of the first guide roller in the vertical direction A step of adjusting a winding angle of the bundled cord of the guide roller, a step of topping rubber on the bundled cord regulated in position by a rolling means, and a second guide roller located in the vicinity of the rolling means in the vertical direction position adjustment to the, and adjusting the winding angle of the bundle code of the second guide roller, said first guide roller, said second guide roller, said rolling means, said beam-like code Of the feed direction in a state arranged substantially in a straight line, a code containing rubber sheet manufacturing method characterized by having a the steps of feeding the bundle cord.

  According to the present invention, when topping untwisted cords, the rubber is bundled with a guide member prior to rolling to form a bundled cord, and the pitch of the bundled cords is aligned. A cordless non-twisted corded rubber sheet can be formed in a state where the pitch between the bundled cords is kept uniform.

FIG. 1A is a schematic side view of an essential part of a production apparatus for a rubber sheet with an untwisted cord according to an embodiment of the present invention, and FIG. 1B is an enlarged side view of a guide roller. It is a front view of a guide roller. It is sectional drawing of a bundled cord. It is a top view of the manufacturing apparatus of the rubber sheet containing a non-twisted cord shown in FIG. 1A. FIG. 5A is a schematic side view of an essential part of an apparatus for producing a rubber sheet with an untwisted cord according to another embodiment of the present invention, and FIG. 5B is an enlarged side view of a second guide roller. It is sectional drawing of the rubber sheet containing a non-twisted cord. It is a perspective view of the manufacturing apparatus of the conventional corded rubber sheet.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a schematic side view of an essential part of an apparatus for manufacturing an untwisted corded rubber sheet, for example, a tire reinforcing sheet, according to an embodiment of the present invention, and FIG. 1B is an enlarged side view of a first guide roller.
The apparatus for producing a non-twisted cord-containing rubber sheet according to the present embodiment includes a plurality of reels 10A that are rotatably mounted on a reel device 10 that is a cord supply device, and a cord that has been unwound from the reel 10A. The pulling / braking device 12, the guide roller 20 which is a bundled cord forming means for bundling and aligning the cord C drawn from the braking device 12, and the rubber G 1 and G 2 to the cord C bundled by the guide roller 20. It consists of a pair of calendar devices 30 and 31 which are rolled and topped, that is, upper and lower two stages.

  As shown in FIG. 2, the guide roller 20 has circumferential grooves 20A (groove depth: D2) that are four continuous guide grooves deeper than the diameter (R1) of the cord so that the wound cord does not come off. It is formed at equal intervals (D1), and four untwisted cords C fed from the brake device 12 are bundled in parallel to form a bundled cord, as shown in FIG. 1B. The winding angle θ1 of the untwisted cord is arranged at a position within a predetermined angle of 90 degrees. The guide groove is not limited to four, but may be about 3-10.

The width of the guide groove 20A is 1.01 to 1.15% of the width of the bundled cord. Here, if the width of the guide groove 20A is less than 1.01% of the width of the bundled cord, the bundled cord hardly enters the guide groove 20A, and the cord of the bundled cord may overlap in the groove. Further, if it exceeds 1.15%, gaps are formed between the cords constituting the bundle cord, and the gaps may be non-uniform.
The position of the guide roller 20 is provided at a position where the winding angle θ1 is within 90 degrees with respect to the cord aligning portion or the brake device 12 and the rolling rolls 30B and 31B of the calendar device. Compared to untwisted cords, bundle cords have a large number of cords and are easily bent, and cord disturbance is likely to occur. In order to solve this problem, the wrapping angle of the cord C around the guide roller 20 is defined, the deflection of the cord C is suppressed, and the cord disturbance is prevented. The winding angle θ1 can be adjusted, for example, by adjusting the position of the guide roller 20 in the vertical direction.

  The position of the guide roller 20 in the horizontal plane is such that the cord aligning portion or the brake device 12 and the rolling rolls 30B and 31B are on a straight extension line, that is, the position of the guide roller 20 is θ1. Is preferably close to 0 degrees. This arrangement of the guide roller 20 is the best arrangement for preventing the cord from bending.

  As shown in FIG. 3, the bundled cord made of the untwisted cord C is shown as one bundle formed by a plurality of metal wires arranged in parallel in the horizontal direction, here four metal wires, The number of metal wires constituting one bundle is preferably 2-6. When the number of metal wires in one bundle is 7 or more, it is difficult to arrange them in parallel in the belt ply with a certain interval in the width direction as a bundle aligned in parallel without twisting them, Productivity decreases. Therefore, from the viewpoint of both durability as a tire and productivity as a member, the number of the most effective metal wires in a bundle is actually 3 to 4.

FIG. 4 is a plan view of the rubber sheet manufacturing apparatus shown in FIG. 1A.
In the present embodiment, the respective cords C rewound from the four reels 10A of the reel device 10 are fed to the guide roller 20 in a bundle through the cord aligning device or the brake device 12, and the guide roller 20 Are fed between the rolling rolls 30B and 31B of the calender devices 30 and 31, which are the production devices for the rubber sheets with cords, in a state where the distance between the bundle cords is constant (D1). Here, topping of the rubbers G1 and G2 is performed. The formed non-twisted corded rubber sheet S is drawn out to the outside through the roller 40.

FIG. 5A is a side view schematically showing another embodiment of the cord rolling apparatus.
The cord rolling apparatus according to the second embodiment is different from the first embodiment shown in FIG. 1A in that the second guide roller 21 as the second guide member is viewed in the cord supply direction and the rolling rolls 30B and 31B. (The other configuration of the second embodiment is the same as the configuration of the first embodiment).
In this case, as shown in an enlarged view at the lower right of FIG. 5A, from the line connecting the centers of the rolling rollers 30B or 31B of the guide roller 21 that is the second guide member, to the center position of the guide roller 21 It is preferable that the distance D3 is positioned (or arranged) in the vicinity of the rolling roller 30B or 31B (here, it is positioned so as not to contact the rolling roller 30B or 31B). By positioning the second guide roller 21 in this manner, the pitch of the bundled cord can be kept more constant, and variations between the cords of the bundled cord can be further prevented. Further, if the second guide roller 21 is provided when the rolling roller 30B or 31B is separated from the immediately preceding position, the effect of preventing the variation between the cords of the bundled cord becomes less remarkable.

Further, as shown in FIG. 5B, by arranging the winding angle θ2 of the cord around the guide aligning portion or the guide roller 20 close to the brake device 12 and the guide roller 21 close to the rolling roller to be within 90 degrees, The bending of the cord can be effectively prevented.
Since the winding angle θ2 can also be adjusted by adjusting the position of the guide roller 21 in the vertical direction, the winding angles θ1 and θ2 are close to 0 degrees, respectively, and the guide roller 21 close to the rolling rolls 30B and 31B and the cord It arrange | positions so that the 1st guide roller 20 close | similar to an alignment part may become a straight line. By doing in this way, the bending of a code | cord | chord can be suppressed and the rubber sheet without a cord disorder | damage | failure can be created.

Next, a tire cord rolling method using the tire cord rolling apparatus described above will be described.
A cord C made of a metal wire unwound from each reel 10A of the reel device 10 is drawn out through an aligning device or a brake device 12, and is formed into a bundle of four bundles by each guide groove 20A of the guide roller 20. Then, the position is regulated by being guided by the winding angle (θ1), and in that state (Embodiment 1) or further, the position is regulated by being guided by the winding angle (θ2) by the second guide roller 21 (Embodiment 2). ), Between the rolling roller pairs 30B and 31B of the calendar devices 30 and 31. That is, the code C introduced between the rolling rollers 30B and 31B is, therefore, the topping rubber G1, which is introduced between the conveying roller 30A and the rolling roller 30B and between the conveying roller 31A and the rolling roller 31B and is rolled into a sheet shape, It is introduced between the G2 sheets and is subjected to a topping process by rolling to obtain a reinforcing rubber sheet, for example, a corded sheet.

In the above description, the cord is described as a metal wire. However, the cord is not limited to this, and may be a cord made of a known organic fiber, for example. Further, the topping device is not limited to a device using a calendar device, and for example, in a device using a rubber-coated head described in Patent Document 2, a guide roller may be provided between the rubber-coated head and the rolling roller. .
Furthermore, the rubber sheet with untwisted cords to be manufactured is not limited to one in which the cords whose cross sections are shown in FIG. 6A are arranged one by one on a plane, but may be two layers as shown in FIG. 6B. Good. When arranged in two layers, it is desirable that the upper and lower bundles are shifted from each other in the lateral direction as shown.

  DESCRIPTION OF SYMBOLS 10 ... Reel device, 10A ... Reel, 12 ... Brake device, 20, 21 ... Guide roller, 20A ... Circumferential groove (guide groove), 30, 31 ... Calendar device, 30A, 31A ... Conveying roller, 30B, 31B ... Rolling roller, C ... Cord, G1, G2 ... Rubber, S ... Rubber sheet.

Claims (3)

A device for producing a rubber sheet with a cord by topping rubber to a cord supplied from a cord supply device,
Guide means for horizontally arranging the supplied cords to form a non-twisted bundle cord bundled into a plurality of cords, and to guide the position regulated so that the interval between the formed bundle cords is constant. A first guide roller that adjusts the winding angle of the bundled cord by adjusting the position in the vertical direction ;
Rolling means for topping rubber onto a bundled cord fed from a first guide roller ;
A second guide roller that is positioned in the vicinity of the rolling means and adjusts the winding angle of the bundled cord by adjusting the position in the vertical direction ;
Have a, and the first guide roller, said second guide roller, said rolling means, cords rubber, characterized in that it is substantially linearly arranged respectively in the feed direction of the bundle code Sheet manufacturing equipment. In the rubber sheet manufacturing apparatus according to claim 1,
Wrapped to the previous SL guide means is a deep continuous guide groove than the diameter of the cord is provided around the circumference of the first and second guide rollers, and first and second guide rollers of the bundled cord An apparatus for producing a rubber sheet, characterized in that the angle is within 90 degrees. A method of manufacturing a rubber sheet by topping rubber on a non-twisted cord,
A plurality of the cords supplied from the cord supply device are horizontally arranged by the first guide roller to form a bundled cord, and the interval between the bundled cords of the formed bundled cords is constant . The step of regulating the position in this way, the step of adjusting the position of the first guide roller in the vertical direction and adjusting the winding angle of the bundled cord of the first guide roller,
A step of topping rubber with rolling means on the position-regulated bundle cord;
Adjusting the second guide roller positioned in the vicinity of the rolling means in the vertical direction to adjust the winding angle of the bundled cord of the second guide roller ;
Feeding the bundled cord in a state where the first guide roller, the second guide roller, and the rolling means are arranged substantially linearly in the feeding direction of the bundled cord;
A method for producing a corded rubber sheet, comprising:

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