JPH10264265A - Method and device for producing cylindrical rubber sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a cylindrical rubber sheet in which an unvulcanized rubber sheet is not deformed and the right amount thereof is wound on a cylindrical die and even the comparatively thin rubber sheet is not wrinkled during work and to provide a device therefor. SOLUTION: In a method for producing the cylindrical rubber sheet, a cylindrical die 1 is rotatably supported by horizontally holding its center shaft. A rubber sheet 10 guided by a carrying roll 7 is lowered to the position of a contact bonding plate 4 along a guide plate 2 having an air sliding function. The low end part of the rubber sheet 10 is press-fixed to the outer circumference of the cylindrical die 1 by the contact bonding plate 4 and thereafter a stitcher roll 6 is pressed in contact therewith. Successively, while sending the rubber sheet 10 by the carrying roll 7, the cylindrical die 1 is rotated to wind the rubber sheet 10 of prescribed length. Thereafter, the rubber sheet is stuck and fixed to the guide plate 2 and horizontally cut by a cutting means. Furthermore, after the cylindrical die 1 is rotated, the stitcher roll 6 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for forming a cylindrical rubber sheet (also referred to as a slab) in which an adhesive rubber, a cord, a bottom rubber and the like are sequentially wound around a cylindrical mold in a manufacturing process of a power transmission belt. For the operation of winding the unvulcanized rubber sheet to be the adhesive rubber layer around the cylindrical mold, the rubber sheet is guided, the tip of the rubber sheet is cut horizontally, and the rubber sheet is pressed on the cylindrical mold, and the cylindrical mold is pressed. The present invention relates to a method of manufacturing a cylindrical rubber sheet in which a rubber sheet is wound by rotating a rubber sheet, and a manufacturing apparatus suitably used for the method.

[0002]

2. Description of the Related Art For example, in a method of manufacturing a power transmission belt,
A conventional method for forming a cylindrical rubber sheet by winding an unvulcanized rubber sheet for bottom rubber around a cylindrical mold will be described with reference to FIG. The rubber sheet 2 ′ is rotatably mounted on a rubber sheet holder (not shown) as a roll-shaped rubber sheet 10 ′ wound in a roll shape with the release film 11 ′ therebetween, while separating the release film 11 ′. It is fed in the direction of arrow Y (the drive device is not shown). Rubber sheet 2 '
Is transmitted through a guide roll 12 ', a dancer roll 34', and an inspection table 36 ', and is sent to a cutting table 35' by a roll 5 '. The dancer roll 34 'buffers a change in tension applied to the rubber sheet 2' when the delivery roll 5 'starts and stops. The inspection table 36 'has a portion for flatly supporting the rubber sheet 2' in order to visually inspect the external defects of the rubber sheet 2 '. The rubber sheet 2 'sent to the cutting table 35' is cut in the width direction by the cutter 1 '. A rotary blade or a linear cutter (for example, trade name, Olfa cutter) is used as the cutter 1 ′, and a direction crossing the rubber sheet 2 ′ (a direction perpendicular to the arrow Y).
Cut into pieces. The length for cutting the rubber sheet 2 'is a length corresponding to the outer peripheral length of the cylindrical mold 3' designed in advance. The tip of the cut rubber sheet 2 ′ is guided to the upper surface of the cylindrical mold 3 ′ by hand, and the cylindrical mold 3 ′ is rotated by one turn while the entire width is pressed by the stitcher roll 4 ′. .

[0003]

However, in the method and apparatus for manufacturing a cylindrical rubber sheet as described above,
Since the rubber sheet is cut and guided manually, the flexible unvulcanized rubber sheet is deformed, and the length of the rubber sheet does not correspond exactly to the outer peripheral length of the cylindrical mold. The end of the rubber sheet wound around the mold may be excessive or insufficient. Further, the adhesive rubber layer is often relatively thin, and may adhere to the cutting table and partially wrinkle when moved on the cutting table.

The present invention has been made in view of the above points, and when setting the end of a rubber sheet in a cylindrical mold, variations in the length of the end of the rubber sheet are minimized, and even a soft and thin rubber sheet is wrinkled. It is an object of the present invention to provide a manufacturing method and an apparatus therefor which can be guided without any trouble.

[0005]

In order to achieve the above object, a method of manufacturing a cylindrical rubber sheet according to the present invention comprises a step of winding an unvulcanized rubber sheet around a cylindrical mold in a step of manufacturing a power transmission belt. A method for producing a rubber sheet, comprising: a) rotatably supporting a cylindrical mold with its central axis horizontal, and b) above the cylindrical mold and the center of the cylindrical mold. The rubber sheet guided by the feed roll attached parallel to the axis, along a guide plate having an air slide function provided below the feed roll,
It is lowered until it reaches the position of the crimping plate provided below it, c) after the lower end of the rubber sheet is crimped to the outer periphery of the cylindrical mold by the crimping plate, a stitcher roll is attached to the cylindrical mold. Pressing, d) rotating the cylindrical mold while feeding the rubber sheet by the feed roll, winding the rubber sheet of a predetermined length, and continuing, e) suctioning the air slide mechanism of the guide plate. After switching, the rubber sheet is sucked and fixed, and the rubber sheet is cut by a cutting means. F) After further rotating the cylindrical mold, the stitcher roll is separated.

The rubber sheet is sent out in synchronism with the rotation of the cylindrical mold by a feed roll mounted above the cylindrical mold and parallel to the central axis of the cylindrical mold, and is fed below the rubber sheet. Is lowered by the guide plate provided with the air slide function until it reaches the position of the crimp plate provided below the guide plate. Since the rubber sheet floats and is guided by the air slide function of the guide plate, the rubber sheet and the guide plate do not come into contact with each other and do not wrinkle.
Further, the lower end of the rubber sheet is lowered to the position of the pressure-bonding plate, and by pressing the pressure-bonding plate against the cylindrical mold, the front end thereof can be pressure-bonded to the cylindrical mold (unvulcanized rubber is It adheres to the iron roll by pressure). After crimping the lower end of the rubber sheet to the outer periphery of the cylindrical mold, the crimping plate is separated, and the stitcher roll is pressed in close proximity to the lower end of the rubber sheet. By rotating the cylindrical mold while feeding the rubber sheet by the feed roll, the rubber sheet is pressed against the cylindrical mold by the stitcher roll, and a predetermined length is wound on the rubber sheet without applying tension. Further, the blowing of air from the guide plate having the air slide mechanism is switched to suction, the rubber sheet is sucked to the guide plate, and the rubber sheet is cut to a predetermined length by the cutting means running horizontally. The rubber sheet does not move in the width direction by being sucked and cut by the guide plate of the rubber sheet, and no wrinkles are generated by the cutting means. Further rotating the cylindrical mold,
After pressing the cut rubber sheet to the end, the stitcher roll is separated, and the process proceeds to the next step.

According to a second aspect of the present invention, there is provided an apparatus for manufacturing a cylindrical rubber sheet which is preferably used in the method for manufacturing a cylindrical rubber sheet according to the first aspect, wherein: Means for detachably and rotatably mounting with its central axis horizontal, and b) mounted above the pressure line of contact between the cylindrical mold and the rubber sheet and parallel to the central axis of the cylindrical mold. C) a guide plate provided below the feed roll and near the pressure contact line between the cylindrical mold and the rubber sheet; d) a guide plate provided below the guide plate. Cutting means running in the width direction of the rubber sheet, e) a crimping plate capable of contacting and separating from a cylindrical mold provided with a gap in which the cutting means runs, and f) below the crimping plate. And a stitcher roll capable of contacting and separating from the cylindrical mold.

In the means for detachably and rotatably mounting the cylindrical mold, support means provided with a rotation driving means and support means which can be opened and closed are provided at corresponding positions, and both ends of the cylindrical mold are connected. Support and rotate. The feed roll is mounted above a line (pressure line) where the cylindrical mold and the rubber sheet are in contact with each other, and is mounted in parallel with the center axis of the cylindrical mold, and is provided in synchronization with the rotation of the cylindrical mold. Send out a rubber sheet of length. The fed rubber sheet is naturally lowered, guided on the guide plate, and lowered. The guide plate is provided between the feed roll and the pressure contact line, and guides the descending rubber sheet to prevent shaking. By cutting means (cutting blade, ultrasonic cutter, etc.) running horizontally along the lower end,
The tip of the rubber sheet can be cut horizontally (parallel to the central axis of the cylindrical mold). The lower end of the cut rubber sheet is pressed against the cylindrical mold by a crimping plate which can be brought into contact with and separated from the cylindrical mold. After separating the crimping plate, press the stitcher roll that can contact and separate to the cylindrical mold against the cylindrical mold, and rotate the cylindrical mold while feeding the rubber sheet, so that the rubber sheet sandwiched between them Is pressed into a cylindrical mold and wound.

According to a third aspect of the present invention, there is provided a cylindrical rubber sheet manufacturing apparatus, wherein the guide plate has a space therein, a large number of fine holes on a side wall facing the cylindrical mold, and a plurality of fine holes on the opposite side wall. It has a hollow box shape with a vent for introducing pressurized air or discharging internal air. When the rubber sheet is lowered, pressurized air is ejected from the fine holes to perform an air slide function, and the rubber sheet is lowered smoothly without wrinkles. By discharging the air in the box when cutting the rubber sheet, the rubber sheet is sucked and fixed to the guide plate, and is stably held against the lateral action caused by the travel of the cutting means.

According to a fourth aspect of the present invention, there is provided an apparatus for manufacturing a cylindrical rubber sheet, wherein the pressure-bonding plate has a space therein, has a large number of pores on a side wall facing the cylindrical mold, and has the above-mentioned side wall surface. It has a crimping projection parallel to the central axis of the cylindrical mold, and has a vent on the opposite side wall for introducing pressurized air or discharging internal air.

The rubber sheet is adsorbed on the side wall by discharging the air in the pressure-bonding plate, thereby preventing the rubber sheet from swaying due to the operation of the cutting means, and pressing the rubber sheet tip against a cylindrical mold. Is not separated from the crimp plate. After the rubber sheet is pressed, the pressurized air is blown out of the pores to separate the rubber sheet and the pressure plate, so that only the pressure plate can be separated from the cylindrical mold. Performs an air slide function when descending. Further, when the pressing plate is pressed against the cylindrical mold by the pressing protrusion, the rubber sheet can be partially pressed strongly, so that the rubber sheet is easily pressed against the cylindrical mold.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a method and an apparatus for manufacturing a cylindrical rubber sheet according to the present invention will be described with reference to the drawings. FIG. 1 is a side view illustrating a manufacturing apparatus (part) according to the present embodiment, and FIG.
FIG. 3 is a partial cross-sectional view illustrating the structure of a guide plate 2 and a pressure plate 4 of the device of FIG. FIG. 3 is a perspective view of the crimping plate 4, and FIG. 4 is a side view for explaining the movement of the crimping plate 4. FIG.
It is a side view which shows the whole structure (image) of the apparatus which concerns on the manufacturing apparatus of the cylindrical rubber sheet of a present Example.

First, the overall configuration of the apparatus according to the present embodiment shown in FIG. 5 includes a sending means 50, a guiding means 51, and a winding means 52. These devices are shown in a side view to explain the overall positional relationship, and the feed roll 7, the guide plate 2, the mold 1 and the like are shown individually or integrally, rotatably or movably as required. It is attached to a frame not to have and has driving means.

The delivery means 50 is a rubber sheet support means for rotatably supporting an unvulcanized rubber sheet 30 (for example, an adhesive rubber sheet which is one of the materials of a transmission belt) wound on a roll at the upper part. A movable carriage 32 provided with 31 is provided with guide rolls 37 and 36, a rubber sheet side end sensor 35, and a liner winding means 34. Unvulcanized rubber sheet 3
The rubber sheet 10 is pulled out in the direction of the arrow x by hanging the shaft 0 on the rubber sheet supporting means 31 and winding the liner 33 by the liner winding means 34. The pulled-out rubber sheet 10 is separated from the liner 33 at the position of the guide roll 37, guided by the guide roll 36, and sent to the next step. At this time, the side end of the rubber sheet 10 is detected by the rubber sheet side end sensor 35, and the traveling position of the rubber sheet 10 is kept constant by moving the movable carriage 32.

The guide means 51 is a means for guiding the rubber sheet 10 to the winding means 52. The guide means 51 is provided between the guide roll 36 and the guide roll 11 so that the slack portion 13 of the rubber sheet 1 is provided.
The lower end of the slack is detected by the sensors 38 and 39, and a signal is sent to the sending means 50 so that the rubber sheet 10
The sending speed is adjusted according to the progress of the winding operation.

The winding means 52 includes a feed roll 7, a guide plate 2, and a cylindrical mold 1. More specifically, as shown in a side view of a partially enlarged view in FIG. , A guide plate 2 having an air slide function provided thereunder, a cutting means 3, a pressure plate 4 attached below the gap through which the cutting means 3 travels, and a cylindrical metal It has a stitcher roll 6 that can contact and separate from the mold 1. In addition, guide plate 2, crimping plate 4
The cutting means 3 is integrally movably mounted on the guide rail 41, is close to the cylindrical mold 1 when the rubber sheet 10 is pressed against the cylindrical mold 1, and is separated when the rubber sheet 10 is wound. The flow of the rubber sheet 10 is facilitated.

The feed roll 7 is mounted above a line where the cylindrical mold 1 and the rubber sheet 10 are in contact, that is, above a pressure contact line 53. This is because, when the rubber sheet 10 guided by the feed roll 7 is lowered along the guide plate 2, it naturally approaches the position of the pressure contact line 53. The rubber sheet 10 guided by the guide means 51 is wound around the upper part of the feed roll 7, pressed by the pressing roll 8, and sent out in synchronization with the rotation of the feed roll 7. The fed rubber sheet 10 descends on the guide plate 2 along the side surface (the side surface having an air slide function) facing the cylindrical mold 1, and stops when its tip comes to the position of the pressure bonding plate 4. The lower end of the rubber sheet 10 is cut in the width direction by the cutting means 3. As the cutting means 3, an ultrasonic cutter which exerts a small force on the rubber sheet 10 is preferably used. The cutting means 3 such as an ultrasonic cutter travels in the width direction of the rubber sheet 10 while being supported by the moving table 42, and stands by at a position separated from the cylindrical mold 1 when descending the rubber sheet 10, When the rubber sheet 10 is cut, the cutting means 3 is run while the rubber sheet 10 is attracted to the guide plate 2 and the pressure plate 4 to cut.

The crimping plate 4, which is mounted below the guide plate 2 with a gap 19 in which the cutting means 3 runs, has a cylindrical mold for the crimping plate 4, as schematically shown in FIG. Form a horizontal crimping projection 25 on the side facing 1
A tip detection sensor 26 is provided near the lower part of the approximate center. Rubber sheet 1 supplied by feed roll 7
The leading end of the rubber sheet 10 is stopped by detecting the leading end of the rubber sheet 10. At this time, the front end of the rubber sheet 10 is located below the press-fitting protrusion 25. It is crimped to the mold 1. As shown in FIG. 4, the guide plate 2 and the pressure plate 4 are integrally mounted on the guide rail 41 (see FIG. 1), so that the pressure plate 4 can be moved before starting the operation (when lowering the rubber sheet 10). Is at the origin position (a), and the rubber sheet 10
Is moved to the crimping position (b) when crimping is performed, and returns to the origin position (a) when the rubber sheet 10 is wound around the cylindrical mold 1 after crimping.

As shown in FIG. 1, a stitcher roll 6 is provided below the crimping plate 4 so as to be able to press and separate from the cylindrical mold 1. After the front end of the rubber sheet 10 is pressed against the cylindrical mold 1 by the pressing plate 4, the stitcher roll 6 is pressed against the cylindrical mold 1, and the cylindrical mold is fed while the rubber sheet 10 is fed by the feed roll 7. 1 is turned in the direction of arrow x, and the rubber sheet 1 is wound and pressed to form a cylindrical rubber sheet.

FIG. 2 is a sectional view showing the structure of the guide plate 2 and the pressure plate 4. The guide plate 2 and the crimping plate 4 are formed in a hollow box shape, and a large number of pores 20 and 22 are provided on a side wall 21 (side wall facing the cylindrical mold 1) for guiding the rubber sheet 10, and the opposite side wall is provided. Are provided with ventilation holes 16, 17, 18 for sending compressed air or discharging air. A spring steel plate 40 is attached to the upper portion of the guide plate 2 to bridge the rubber sheet 10 fed by the feed roll 7 to the guide plate 2. The crimping plate 4 is provided between the cutting means 3 and the guide plate 2.
Are formed integrally with each other, and can be brought into contact with and separated from the cylindrical mold 1 as described above (see FIG. 1).

When descending the rubber sheet 10, the guide plate 2 and the like having such a structure sends compressed air from the vent 16 and the like and blows out air from the fine holes 20 and 22. The rubber sheet 10 descending along is prevented from adhering to the guide plate 2 or the like.
The lower end of the rubber sheet 10 is the tip detection sensor 2 of the pressure plate 4.
6, the feeding of the rubber sheet 10 is stopped, the blowing of the air is stopped, the internal air is exhausted from the vents 16 and the like, and the air is sucked from the fine holes 20 and 22 to remove the rubber sheet 10. To the guide plate 2 or the like. Thereby, the rubber sheet 10 is cut without running away when the cutting means 3 is run. After cutting, the rubber sheet 1 is switched by switching the suction of air to the blowing of pressurized air.
0 rises again and can be lowered, inching is performed, and the lower end of the rubber sheet 10 is lowered to the position of the tip detection sensor 26 below the crimping projection 25 of the crimping plate 4 (see FIG. 3). Subsequently, the pressure plate 4 and the like are switched to suction, and the rubber sheet 10
And pressure-bonded to the cylindrical mold 1. After crimping, the internal air is switched to pressurized air again, the crimping plate 4 and the like are separated from the rubber sheet 10, and the crimping plate 4 and the like are moved to the origin position (a).
(Refer to FIG. 4). Subsequently, the above-mentioned stitcher roll 6 is pressed against the cylindrical mold 1, and then the cylindrical mold 1 is rotated and pressed while feeding a rubber sheet 10 of a predetermined length to form a cylindrical rubber sheet.

[0022]

As is apparent from the above description,
The method and apparatus for manufacturing a cylindrical rubber sheet according to the present invention have the following excellent effects. In the manufacturing method according to the first aspect of the present invention, the rubber sheet is lowered along the guide plate from above the cylindrical mold and its tip is brought close to the cylindrical mold. Is prevented from occurring, and there is no difference between the length of the rubber sheet and the length of the outer circumference of the cylindrical mold. Further, the rubber sheet can be lowered without generating wrinkles by the guide plate having the air slide function. Further, when the rubber sheet is cut to a predetermined length, the rubber sheet can be suction-fixed to prevent the rubber sheet from escaping.

According to a second aspect of the present invention, there is provided an apparatus suitable for performing the method of the first aspect. That is, by this manufacturing apparatus, the rubber sheet can be pressed and wound on a cylindrical mold without being deformed, and furthermore, the leading end of the rubber sheet is horizontally aligned by cutting means, and when the winding is completed. A continuous rubber sheet can be cut to a predetermined length.

According to the manufacturing apparatus of the third aspect, since the guide plate has both the sliding function and the suction function, when the guide sheet is switched, mutual contact is prevented by the sliding function when the rubber sheet is fed so that the rubber sheet can be fed. When the rubber sheet is cut without wrinkles, the function is switched to the suction function to prevent the rubber sheet from escaping.

According to the fifth aspect of the present invention, since the crimping plate has crimping protrusions, when the tip of the rubber sheet is pressed against the cylindrical mold, the protrusions are particularly strongly pressed, and the rubber sheet is pressed. Is securely pressed to the cylindrical mold.

[Brief description of the drawings]

FIG. 1 is a side view illustrating a winding step of a manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a partial sectional view illustrating the structure of a guide plate 2 and a pressure plate 4 of the apparatus of FIG.

FIG. 3 shows a perspective view of the pressure bonding plate 4 of FIG.

FIG. 4 is a side view for explaining the movement of the press contact plate 4 and the like in FIG. 1;

FIG. 5 is a side view showing an image of an entire apparatus for manufacturing a cylindrical rubber sheet according to an embodiment of the present invention. flame,
The drive means and the like are omitted.

FIG. 6 is a perspective view showing a conventional apparatus for manufacturing a cylindrical rubber sheet.

[Explanation of symbols]

 1: Cylindrical mold 2: Guide plate 3: Cutting means 4: Crimping plate 6: Stitcher roll 7: Feeding roll 10: Rubber sheet 16, 17, 18: Vent 25: Crimping protrusion 26: Tip detection sensor 50: Sending out Means 51: Guide means 52: Winding means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masatoshi Umemiya 3-2-1-15 Meiwadori, Hyogo-ku, Kobe-shi, Hyogo Inside BANDO CHEMICAL CO., LTD. (72) Inventor Noboru Yoshishima 3 Meiwa-dori, Hyogo-ku, Hyogo-ken BANDO CHEMICAL CO., LTD. (72) Inventor Minoru Takenaka 3-2-1, Meiwa-dori, Hyogo-ku, Kobe City, Hyogo Prefecture BANDO CHEMICAL CO., LTD. (72) Inventor Masahide Naya Hyogo, Kobe City, Hyogo Prefecture 3-72-15 Meiwadori-ku, Bando Kagaku Co., Ltd. (72) Inventor Naohisa Harushige 3-2-1-15 Meiwadori, Hyogo-ku, Kobe-shi, Hyogo Bundo Chemical Co., Ltd.

Claims (4)

[Claims] 1. A method of manufacturing a cylindrical rubber sheet by winding an unvulcanized rubber sheet around a cylindrical mold in a process of manufacturing a power transmission belt, wherein the cylindrical mold is rotatable with its central axis horizontal. The rubber sheet guided by a feed roll mounted above the cylindrical mold and parallel to the central axis of the cylindrical mold is provided with an air slide function provided below the feed roll. After the lower end of the rubber sheet is pressed against the outer periphery of the cylindrical mold by the pressure plate, the stitcher roll is moved down to the position of the pressure plate provided below the guide plate having the same. Pressing against the cylindrical mold, winding the rubber sheet of a predetermined length by rotating the cylindrical mold while feeding the rubber sheet by the feed roll, and continuing, the The slide mechanism is switched to suction, the rubber sheet is sucked and fixed, the rubber sheet is cut by a cutting means, the cylindrical mold is rotated, and then the stitcher roll is separated. A method for producing a cylindrical rubber sheet. 2. An apparatus for manufacturing a cylindrical rubber sheet by winding an unvulcanized rubber sheet around a cylindrical mold removably mounted with a central axis horizontal in a manufacturing process of the power transmission belt, A feed roll mounted above the pressure line of contact between the cylindrical mold and the rubber sheet and parallel to the central axis of the cylindrical mold, and the cylindrical mold below the feed roll and A guide plate provided up to the vicinity of the pressure contact line with the rubber sheet, cutting means provided below the guide plate and running in the width direction of the rubber sheet, and a gap provided for running the cut means. An apparatus for manufacturing a cylindrical rubber sheet, comprising: a pressure-bonding plate capable of contacting / separating from a cylindrical mold provided; and a stitcher roll capable of contacting / separating from the cylindrical mold below the pressure-bonding plate. . 3. The guide plate has a space inside, has a large number of pores on a side wall facing the cylindrical mold, and introduces pressurized air to the opposite surface. 3. The apparatus for producing a cylindrical rubber sheet according to claim 2, wherein the apparatus has a hollow box shape having a vent for discharging air. 4. The crimping plate has a space inside, has a large number of pores on a side wall facing the cylindrical mold, and has a crimp projection parallel to the central axis of the cylindrical mold on the side wall surface. The apparatus for producing a cylindrical rubber sheet according to claim 2, further comprising: a vent for introducing pressurized air to an opposite side wall thereof and discharging air therein.