JP2018043371A - Device for production of belt-like rubber member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production device for a belt-like rubber member including a process of inverting the side of the member.SOLUTION: A production device 12 for a belt-like rubber member comprises: an extruder 14 for extrusion-molding the belt-like member 2 of an unvulcanized rubber; a conveyor 20 for conveying the belt-like member 2; and an inversion auxiliary device 16 for assisting the inversion of the side of the belt-like member 2 between the extruder 14 and the conveyor 20. The inversion auxiliary device 16 is equipped with two rotatable auxiliary rollers 26 which are arranged at intervals in a feed direction of the belt-like member 2. The pivots of two auxiliary rollers 26 are orthogonal to the feed direction of the belt-like member 2 and also orthogonal to a width direction thereof.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an apparatus for manufacturing a belt-like rubber member.

  Japanese Patent Laying-Open No. 2015-217618 discloses a method for producing a sidewall member of a tire. This sidewall member has an asymmetric shape in the width direction. This side wall member is obtained from a strip-shaped member of unvulcanized rubber. In this production method, a groove is formed in the sidewall member. By this groove, the direction of the sidewall member is correctly identified. Sidewall members are placed in the correct orientation. In the preforming step, it is easy to bond the sidewall member to another member in the correct orientation.

JP, 2015-217618, A

  There are tires of TOS structure and tires of SOT structure. In the tire preforming process, in the TOS structure, the tread member is overlapped on the radially outer side of the sidewall member. In the SOT structure, the sidewall member is overlapped on the outer side in the radial direction of the tread member. In the preforming process, the front and back directions of the sidewall members to be bonded are reversed between the TOS structure and the SOT structure. In a line that produces various products, these sidewall members are extruded by the same extrusion device. This extrusion apparatus extrudes the front and back of these sidewall members in the same direction.

  For this reason, in a preforming process, the front and back are reversed in any one of the thing for TOS structures and the thing for SOT structures among sidewall members. This inversion generates additional production man-hours. For this reversal, a reversing device is required for each preforming device.

  The objective of this invention exists in provision of the manufacturing apparatus of the strip | belt-shaped member which reverses front and back.

An apparatus for manufacturing a belt-shaped member according to the present invention includes an extrusion device that extrudes a belt-shaped member of unvulcanized rubber, a transport device that transports the belt-shaped member, and the belt-shaped member between the extrusion device and the transport device. And an inversion assisting device for assisting inversion of the front and back sides.
The inversion assisting device includes two auxiliary rollers. The two auxiliary rollers are rotatable. The two auxiliary rollers are arranged at an interval in the feeding direction of the strip member. The rotation shafts of the two auxiliary rollers are orthogonal to the feeding direction of the strip member and orthogonal to the width direction of the strip member.

  Preferably, the reversing assist device includes an operating position that assists reversal of the strip member between the extrusion device and the transport device, and the strip member transported between the extrusion device and the transport device. It is possible to move between the retreat positions to leave.

  Preferably, the manufacturing apparatus includes a control device and a position detection sensor. The control device has a function of receiving, from the position detection sensor, a detection signal indicating whether or not the inversion assisting device is in an operating position.

  Preferably, the control device has a function of controlling the extrusion device. The control device determines consistency between a function for storing the necessity of reversal of the belt-shaped member and a detection signal indicating whether the reversal auxiliary device is in the operating position and the necessity of reversal of the belt-shaped member. A function and a function of stopping the extrusion device when it is determined that there is no consistency.

  Preferably, the manufacturing apparatus includes a control device and a rotation detection sensor that detects the rotation directions of the two auxiliary rollers. The control device has a function of receiving a detection signal of the rotation direction of the two auxiliary rollers from the rotation detection sensor.

  Preferably, the control device has a function of controlling the extrusion device. The control device has a function of determining whether or not the rotation directions of the two auxiliary rollers are opposite to each other from a detection signal of the rotation directions of the two auxiliary rollers, and the rotation directions of the two auxiliary rollers are mutually different. And a function of stopping the extrusion device when it is determined that the direction is not reversed.

The method for manufacturing a sidewall member according to the present invention includes an extrusion process in which a strip-shaped member made of unvulcanized rubber is extruded, and a cutting process in which the strip-shaped member is cut to obtain a sidewall member.
In the extruding step, an extruding device for extruding the band-shaped member, a conveying device for conveying the band-shaped member, and an inversion assisting device for assisting inversion of the front and back of the band-shaped member between the extruding device and the conveying device. Have been prepared. The inversion assisting device includes two auxiliary rollers. The two auxiliary rollers are rotatable. The two auxiliary rollers are arranged at an interval in the feeding direction of the strip member. The rotation axes of the two auxiliary rollers are orthogonal to the feeding direction of the strip member and intersect the width direction of the strip member. The strip member is passed between the two auxiliary rollers. The front and back of the belt-like member are reversed between the extrusion device and the transport device.

  Preferably, in this manufacturing method, the sidewall member includes a main body member that is vulcanized to form a sidewall, and a clinching member that is vulcanized to form a clinch.

  In the manufacturing apparatus according to the present invention, the belt-like member is reversed using two auxiliary rollers. Thereby, a strip | belt-shaped member is easily reversed. It is suppressed that the reversed strip | belt-shaped member returns. In this manufacturing apparatus, it is not necessary to reverse the front and back of the belt-shaped member in a subsequent process.

FIG. 1 is an explanatory view showing a part of a belt-like member and a sidewall member obtained by a manufacturing apparatus according to an embodiment of the present invention. FIG. 2 is a conceptual diagram showing a part of a manufacturing apparatus according to an embodiment of the present invention. FIG. 3 is an explanatory diagram of the manufacturing apparatus of FIG. 4A is an explanatory view of the posture of the sidewall member in the tire having the SOT structure, and FIG. 4B is an explanatory view of the posture of the sidewall member in the tire having the TOS structure.

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

  FIG. 1 shows a part of the pair of band-like members 2, the cutter 4, and the pair of sidewall members 6. In FIG. 1, the band-shaped member 2 is cut to a predetermined length by a cutter 4 to obtain a side wall member 6. The arrow Xr in FIG. 1 represents the longitudinal direction of the sidewall member 6 (band member 2), the arrow Yr represents the width direction, and the arrow Zr represents the thickness direction. In the sidewall member 6, the main body member 8 and the clinch member 10 are integrated. The main body member 8 is a member that is vulcanized to form a sidewall of the tire. The clinch member 10 is a member that is vulcanized to form a tire clinch.

  Although not shown, in the tire, the sidewall extends substantially inward in the radial direction from the end of the tread that contacts the road surface. This sidewall is required to have cut resistance and weather resistance. The composition of the rubber for the sidewall is designed in consideration of ride comfort performance. The clinch is positioned substantially inward of the sidewall in the radial direction and abuts against the flange of the rim. The composition of the clinching rubber is designed in consideration of wear resistance and durability. Different rubber is used for the side wall and the clinch.

  In the sidewall member 6, the composition of the unvulcanized rubber of the main body member 8 is different from that of the clinch member 10. In the side wall member 6, the main body member 8 is located on one side in the width direction, and the clinch member 10 is located on the other side. The thickness of the sidewall member 6 changes in the width direction. The shape of the sidewall member 6 is asymmetric in the width direction. Further, the sidewall member 6 is different in the shape of the front surface 6a and the shape of the back surface 6b.

  FIG. 2 shows a part of the manufacturing apparatus 12 that manufactures the belt-shaped member 2. In FIG. 2, the arrow X represents the front-rear direction front of the manufacturing apparatus 12, the arrow Y represents the left-right direction left, and the arrow Z represents the up-down direction. The manufacturing apparatus 12 includes a pair of extrusion devices 14, a pair of reversal auxiliary devices 16, a position change device 18, a transport device 20, and a pair of position detection sensors 22. Although not shown, the manufacturing apparatus 12 further includes four rotation detection sensors and a control device.

  Each extrusion device 14 includes a main body member extruder, a clinching member extruder, and a base (not shown). The main body member extruder has a function of extruding the unvulcanized rubber of the input main body member 8 in a predetermined cross-sectional shape. The clinching member extruder has a function of extruding uncured rubber of the inserted clinching member 10 into a predetermined cross-sectional shape. The base has a function of integrating the extruded body member 8 and the clinch member 10 into a cross-sectional shape of the belt-like member 2. The manufacturing apparatus 12 includes a pair of extrusion apparatuses 14. However, the pair of extrusion apparatuses 14 may be integrated into a single extrusion apparatus. Further, the manufacturing apparatus 12 may include only one of the pair of extrusion apparatuses 14.

  Each inversion assisting device 16 is located between the extrusion device 14 and the conveying device 20. The inversion assisting device 16 includes a head 24 and a pair of auxiliary rollers 26. The pair of auxiliary rollers 26 are supported by the head 24. The pair of auxiliary rollers 26 are arranged side by side in the vertical direction. Each auxiliary roller 26 is rotatable about the front-rear direction as a rotation axis.

  The position change device 18 supports a pair of inversion assisting devices 16. The position changer 18 includes a guide rail 28 and a drive unit (not shown). For example, a cylinder is used as the drive unit. The guide rail 28 extends in the left-right direction. Each reversing auxiliary device 16 is movable along the guide rail 28 by the cylinder. Although not shown, the position changing device 18 has a function of changing the position of the pair of reversing auxiliary devices 16 between the operating position and the retracted position. The inversion assisting device 16 can move from the lower side of the extrusion device 14 to a retracted position shifted in the left-right direction. In this retracted position, the pair of auxiliary rollers 26 are separated from the belt-like member 2 fed from the extrusion device 14.

  In FIG. 2, the pair of inversion assisting devices 16 are in the operating position. In this operating position, the inversion assisting device 16 is located between the extrusion device 14 and the conveying device 20. The inversion assisting device 16 is located below the extrusion device 14. The pair of auxiliary rollers 26 are located below a base (not shown) of the extrusion device 14. In other words, the pair of auxiliary rollers 26 are arranged in the feeding direction of the belt-like member 2.

  The transport device 20 includes a guide roller 30, a feed roller 32, and a motor as a drive unit (not shown). The guide roller 30 is located below the extrusion device 14. The guide roller 30 can rotate with the left-right direction as a rotation axis. The guide roller 30 has a function of guiding the belt-like member 2 to the feed roller 32. The feed roller 32 has a function of feeding the belt-like member 2 toward the subsequent process by driving the motor. Instead of the feed roller 32, a belt conveyor may be used. The belt-shaped member 2 may be sent toward the subsequent process by the belt conveyor.

  The position detection sensor 22 has a function of detecting the reversal auxiliary device 16 in the operating position. For example, a proximity sensor is used as the position detection sensor 22. As the position detection sensor, a sensor that detects light, a limit switch, or the like may be used in addition to a sensor that detects an eddy current like a proximity sensor. The position detection sensor 22 is not particularly limited as long as it can detect whether or not the reversal auxiliary device 16 is in the operating position. The position detection sensor 22 may detect the position of the cylinder rod of the position changing device 18 instead of the detection by the reversing auxiliary device 16.

  Although not shown, the four rotation detection sensors have a function of detecting the rotation direction of the auxiliary roller 26. Each rotation detection sensor has a function of detecting the rotation direction of the corresponding auxiliary roller 26. As this rotation detection sensor, for example, a sensor that detects by overcurrent, a sensor that detects by light, or the like is used. The rotation detection sensor is not particularly limited as long as it can detect the rotation direction of the auxiliary roller 26 and may be a non-contact type or a contact type.

  Although not shown, the control device controls the operation and stop of the extrusion device 14, the conveyance device 20, the position detection sensor 22, and the rotation detection sensor. The control device has a function of receiving detection signals from the position detection sensor 22 and the rotation detection sensor. The control device has a function of storing the type of the belt-like member 2 and the necessity of inversion of the front and back of the belt-like member 2. The control device has a function of determining whether the combination of the necessity of reversing the front and back of the belt-like member 2 and the detection signal of the position detection sensor 22 is appropriate. Further, the control device has a function of determining whether or not the rotation directions of the upper and lower auxiliary rollers 26 are opposite to each other based on the detection signal of the rotation detection sensor.

  A double-headed arrow P in FIG. 3 represents the interval between the auxiliary rollers 26 arranged above and below. This interval P is measured as a linear distance from the rotation center of one auxiliary roller 26 to the rotation center of the other auxiliary roller 26. A double-headed arrow D represents the diameter of the auxiliary roller 26. In the manufacturing apparatus 2, the auxiliary rollers 26 arranged above and below each have an outer peripheral surface having a diameter D.

  A tire manufacturing method using the manufacturing apparatus 12 will be described. In this manufacturing method, an extrusion process in which the belt-shaped member 2 is obtained, a cutting process in which the belt-shaped member 2 is cut to obtain the sidewall member 6, and a large number of members including the sidewall member 6 are bonded to form a raw cover. And a vulcanization process in which the raw cover is vulcanized with a mold. In this vulcanization process, a tire is obtained from the raw cover.

  Here, an extrusion process and a cutting process of an SOT structure tire will be described. In this extrusion process, the operator inputs the type of the belt-like member 2 to the control device of the manufacturing apparatus 12. This belt-like member 2 is used for a tire having an SOT structure. An operator moves the inversion assisting device 16 to the operating position shown in FIG. The position detection sensor 22 transmits a detection signal of the inversion assisting device 16 to the control device. The control device receives this detection signal. The control device operates the extrusion device 14 after receiving the detection signal. The strip-shaped member 2 is extruded downward from the extrusion device 14. The belt-like member 2 is pushed out from the extrusion device 14 with the front and back facing in the front-rear direction.

  The operator places the extruded belt-like member 2 along the outer peripheral surface of the upper auxiliary roller 26. The belt-like member 2 is rotated 90 degrees on the front and back. At this time, the front and back of the belt-like member 2 face in the left-right direction. The operator passes the belt-like member 2 between the pair of auxiliary rollers 26. The operator further causes the belt-like member 2 to be along the outer peripheral surface of the lower auxiliary roller 26. The operator further causes the belt-like member 2 to follow the outer peripheral surface of the guide roller 30. The belt-like member 2 is further rotated 90 ° on the front and back. At this time, the front and back of the belt-like member 2 face in the front-rear direction. In this manner, between the extrusion device 14 and the guide roller 30, the front and back of the belt-like member 2 are reversed in the front-rear direction. The operator further causes the feeding direction of the belt-like member 2 along the outer circumferential surface of the guide roller 30 to be forward and forward along the feeding roller 32. At this time, the front and back of the belt-like member 2 face in the vertical direction. The band-shaped member 2 is sent to the cutting process by the feed roller 32. This strip-shaped member 2 may be scraped off on a reel before being sent to the cutting process. The strip-shaped member scraped off may be sent to the cutting process.

  In the cutting step, as shown in FIG. 1, the band-like member 2 is cut to a predetermined length. A side wall member 6 is obtained from the band-shaped member 2. In this sidewall member 6, the front surface 6a faces downward and the back surface 6b faces upward. In this posture, the sidewall member 6 is sent to the preforming step.

  FIG. 4A shows the posture of the sidewall member 6 in the preforming step. In the pre-forming step, the pair of sidewall members 6 are wound around a drum outer peripheral surface (not shown) together with other members. In FIG. 4A, the upper side is outward in the radial direction, the lower side is inward in the radial direction, and the left-right direction is the axial direction. The pair of sidewall members 6 are wound with a wider interval in the axial direction as shown in FIG. Each sidewall member 6 has a cylindrical shape with the back surface 6b as the outer peripheral surface and the front surface 6a as the inner peripheral surface. The side wall member 6 has the clinch member 10 positioned on the inner side in the axial direction and the main body member 8 positioned on the outer side in the axial direction. A carcass ply member (not shown) is enlarged in a toroidal shape on the inner side in the axial direction of the pair of sidewall members. A tread member (not shown) is placed on the radially outer side of the enlarged carcass ply member. After the tread member is placed, the pair of clinch members 10 are set radially inward, and the pair of main body members 8 are raised outward in the radial direction to be bonded to the outside in the axial direction of the carcass ply member. At this time, the radially outer end portion of the main body member 8 is stacked on the axial end portion of the tread member. The surface 6a of the sidewall member 6 forms the outer side surface of the raw cover in the axial direction. This raw cover is sent to the vulcanization process.

  In the vulcanization process, the raw cover is put into a mold and vulcanized. The raw cover is vulcanized to obtain a tire. Through this vulcanization step, the body member 8 forms a sidewall of the tire. Through this vulcanization step, the clinch member 10 forms a tire clinch. Similarly, a tread member (not shown) forms a tread, and a carcass ply member forms a carcass. In this way, a tire is formed.

  Next, a method for manufacturing a tire having a TOS structure using the manufacturing apparatus 12 will be described. In the extrusion process, the operator inputs the type of the belt-like member 2 to the control device of the manufacturing apparatus 12. This belt-like member 2 is used for a tire having a TOS structure. The operator moves the inversion assisting device 16 to the retracted position by the position change device 18. The position detection sensor 22 does not detect the inversion assisting device 16. The control device confirms that the position detection sensor 22 has not detected the reversal auxiliary device 16. The control device operates the extrusion device 14. The strip-shaped member 2 is extruded downward from the extrusion device 14. The belt-like member 2 is pushed out from the extrusion device 14 with the front and back facing in the front-rear direction.

  An operator causes the feeding direction of the belt-like member 2 along the outer circumferential surface of the guide roller 30 to be forward and backward along the feeding roller 32. At this time, the front and back of the belt-like member 2 face in the up-down direction. The band-shaped member 2 is sent to the cutting process by the feed roller 32.

  In the cutting step, the belt-like member 2 is cut into a predetermined length. A side wall member 6 is obtained from the band-shaped member 2. In the side wall member 6, the front surface 6 a faces upward and the back surface 6 b faces downward in the opposite direction to FIG. 1. In the tire having the TOS structure, the front and back directions of the SOT structure tire and the side wall member 6 are reversed. In this posture, the sidewall member 6 is sent to the preforming step.

  FIG. 4B shows the posture of the sidewall member 6 in the preforming step. A pair of sidewall members 6 are wound in a cylindrical shape on the outer peripheral surface of a drum (not shown). In FIG. 4B, the upper side is outward in the radial direction, the lower side is inward in the radial direction, and the left-right direction is the axial direction. The pair of sidewall members 6 are wound with a wider interval in the axial direction as shown in FIG. In this sidewall member 6, the front surface 6a is an outer peripheral surface, and the back surface 6b is an inner peripheral surface. The sidewall members 6 each have the clinch member 10 positioned on the axially outer side and the main body member 8 positioned on the axially inner side. A carcass ply member (not shown) is enlarged in a toroidal shape on the inner side in the axial direction of the pair of sidewall members. As the carcass ply member expands in diameter, the pair of clinch members 10 are moved radially inward, and the pair of body members 8 are raised outward in the radial direction. The pair of sidewall members 6 are disposed on the outside in the axial direction of the enlarged carcass ply member. Thereafter, a tread member (not shown) is placed. At this time, the axial end portion of the tread member is stacked on the radially outer end portion of the main body member 8. The surface 6a of the sidewall member 6 forms the outer side surface of the raw cover in the axial direction. This raw cover is sent to the vulcanization process.

  In the vulcanization step, the tire is obtained from the raw cover in the same manner as the method for manufacturing the tire having the SOT structure.

  As shown in FIGS. 4A and 4B, in the tire having the SOT structure and the tire having the TOS structure, the direction of the front and back of the sidewall member 6 wound around the drum is reversed. . Here, the front and back of the belt-like member 2 are reversed in the SOT structure, and the front and back of the belt-like member 2 are not reversed in the TOS structure. However, the present invention is not limited to this. The front and back of the belt-like member 2 may not be reversed in the SOT structure, and the front and back of the belt-like member 2 may be reversed in the TOS structure.

  The manufacturing apparatus 12 includes an inversion assisting device 16. The inversion assisting device 16 inverts the front and back of the belt-like member 2 through the space between the two auxiliary rollers 26. The belt-like member 2 is subjected to a force for returning this inversion. In the inversion assisting device 16, the lower auxiliary roller 26 suppresses the belt-like member 2 from returning to the original state in the upper auxiliary roller 26. On the other hand, the upper auxiliary roller 26 prevents the belt-like member 2 from returning to the original position in the lower auxiliary roller 26. This inversion assisting device 16 suppresses the inverted belt-like member 2 from returning.

  In the manufacturing apparatus 2, the rotation axis of the auxiliary roller 26 and the feeding direction of the belt-like member 2 are orthogonal to each other. Further, the rotation axis of the auxiliary roller 26 and the width direction of the belt-like member 2 are orthogonal to each other. These crossing angles are sufficient if the crossing angle is such that the belt-like member 2 can be stably fed along the auxiliary roller 26 when the front and back of the belt-like member 2 are reversed. The orthogonality referred to in the present invention is not limited to exactly intersecting at 90 °. From this viewpoint, the orthogonality in the present invention includes a crossing angle of more than 80 ° and less than 100 °.

  In the belt-like member 2 that is pulled toward the subsequent process by the conveying device 20, a longitudinal tension is applied to reverse this inversion. This inversion assisting device 16 can suppress such inversion of the belt-like member 2 from returning. This inversion assisting device 16 is suitable for inversion of the belt-like member 2 pulled in the longitudinal direction by the conveying device 20.

  Further, in the band-shaped member 2 having a narrow width, the inversion easily returns to the original state. This inversion assisting device 16 is particularly suitable for inversion of the band-shaped member 2 having a relatively narrow width. This inversion assisting device 16 is particularly suitable for inversion of the belt-like member 2 having a width of 150 mm or less. The inversion assisting device 16 can sufficiently maintain the inversion as long as the band-shaped member 2 has a width of 100 mm or more.

  The auxiliary roller 26 having a large diameter D can suppress a local force from acting on the belt-like member 2 to be reversed. From this viewpoint, the diameter D is preferably 20 mm or more, more preferably 25 mm or more, and particularly preferably 30 mm or more. On the other hand, the auxiliary roller 26 having a small diameter D contributes to miniaturization of the reversal auxiliary device 16. The small inversion assisting device 16 can be disposed in a narrow space between the extrusion device 14 and the conveying device 20. From this viewpoint, the diameter D is preferably 60 mm or less, more preferably 50 mm or less, and particularly preferably 40 mm or less.

  The auxiliary roller 26 having a large interval P can suppress a load applied to the belt-like member 2 to be reversed. From this viewpoint, the interval P is preferably 100 mm or more, more preferably 150 mm or more, and particularly preferably 200 mm or more. On the other hand, the auxiliary roller 26 having a small interval P contributes to the downsizing of the reversal auxiliary device 16. From this viewpoint, the interval P is preferably 300 mm or less, and more preferably 250 mm or less.

  The inversion assisting device 16 is movable between the operating position and the retracted position. In the manufacturing apparatus 2, the reverse assisting device 16 does not get in the way even when the belt-shaped member 2 is not reversed. Moreover, since the reversal auxiliary device 16 is moved by the position change device 18, it is easy to change the production of the belt-like member 2 to be reversed and the production of the belt-like member 2 not to be reversed. The manufacturing apparatus 12 is suitable for multi-mix production.

  In this manufacturing apparatus 12, the position detection sensor 22 detects whether or not the reversal auxiliary device 16 is in the operating position. The control device receives a detection signal from the position detection sensor 22. Thereby, it is confirmed reliably whether the inversion assisting device 16 is in the operating position. This position detection sensor 22 contributes to prevention of a type change mistake between production of the strip-shaped member 2 to be reversed and production of the strip-shaped member 2 not to be reversed.

  In this manufacturing apparatus 12, the control device further has a function of storing information on the necessity of inversion of the belt-like member 2. The control device has a function of determining consistency between the information indicating whether the reversal is necessary and a detection signal indicating whether the reversal auxiliary device 16 is in the operating position. This control apparatus contributes to prevention of mold change mistakes between the production of the belt-like member 2 to be reversed and the production of the belt-like member 2 not to be reversed. Furthermore, the control device has a function of stopping the extrusion device 14 when it is determined that there is no consistency. As a result, this control device prevents the belt-like member 2 from being produced by erroneously determining whether the belt-like member 2 needs to be reversed.

  In the manufacturing apparatus 12, the rotation detection sensor detects the rotation direction of the auxiliary roller 26. The control device receives a detection signal of the rotation direction of the auxiliary roller 26 from the rotation detection sensor. Thereby, it is confirmed whether or not the belt-like member 2 to be reversed is fed along the auxiliary roller 26.

  This control device has a function of determining whether or not the rotation directions of the upper and lower auxiliary rollers 26 are opposite to each other. By determining the rotation direction, it is confirmed that the belt-like member 2 is correctly passed between the two upper and lower auxiliary rollers 26. This control device contributes to the prevention of guidance mistakes of the belt-like member 2 in the reversal auxiliary device 16. Further, the control device has a function of stopping the extrusion device when it is determined that the rotation directions of the two upper and lower auxiliary rollers 26 are not reverse directions. Thereby, this control apparatus can suppress producing the strip | belt-shaped member 2 mistakenly inversion of the strip | belt-shaped member 2. FIG.

  The temperature of the belt-like member 2 immediately after being extruded from the extrusion device 14 is relatively high. This belt-like member 2 is softer than after being cooled. The inversion assisting device 16 inverts the belt-like member 2. By inverting the belt-like member 2 immediately after being pushed out, damage to the belt-like member 2 is suppressed. The reversing device 16 contributes to the stability of the quality of the belt-like member 2. Further, the belt-like member 2 can be reversed relatively easily. This inversion assisting device 16 facilitates the production of the belt-like member 2 to be inverted.

  In the tire production line, tires are produced by several tens of preforming devices with respect to one extrusion device 14. When the belt-like member 2 is reversed in the preforming step, several tens of reverse assisting devices are required for one extrusion device 14. This manufacturing apparatus 2 can suppress the number of inversion assisting devices 14 to a minimum.

  In this sidewall member, the main body member 8 and the clinch member 10 are integrated. The extrusion device 14 includes a main body member extruder and a clinch member extruder. Thus, in the belt-like member 2 in which the rubber members having different compositions are integrated, the front and back cannot be reversed by changing the shape of the die of the extrusion device 14. This manufacturing apparatus 12 is particularly suitable for reversing the belt-like member 2 in which two or more different rubber members are integrated.

  Moreover, in the strip | belt-shaped member 2 which consists of rubber | gum of a single composition, it can be reversed by changing the shape of the nozzle | cap | die of the extrusion apparatus 14. FIG. However, changing the die of the extruder 14 requires time and man-hours. On the other hand, in the manufacturing apparatus 2, the belt-shaped member 2 can be easily and reliably reversed using the reversal auxiliary device 16. This manufacturing apparatus 12 is excellent in the productivity of the band-shaped member 2.

  In the manufacturing apparatus 12, the control device may control the position change device 18. The reversing auxiliary device 16 may be moved between the operating position and the retracted position by the position changing device 18 based on the information on the necessity of the reversal of the belt-shaped member 2 stored by the control device. Thereby, it can prevent that an operator mistakes the necessity of inversion of the strip | belt-shaped member 2. FIG.

  Here, the strip member of the sidewall member has been described as an example, but the manufacturing apparatus 12 is a strip member that is extruded and widely applied to a member that is used by inverting the front and back in a subsequent process. sell.

DESCRIPTION OF SYMBOLS 2 ... Strip-shaped member 6 ... Side wall member 8 ... Main body member 10 ... Clinch member 12 ... Manufacturing apparatus 14 ... Extrusion apparatus 16 ... Inversion assistance apparatus 18 ... Position type | mold Replacement device 20 ... Conveying device 22 ... Position detection sensor 24 ... Head 26 ... Auxiliary roller 28 ... Guide rail 30 ... Guide roller 32 ... Feed roller

Claims (8)

An extruding device for extruding an unvulcanized rubber band member, a conveying device for conveying the band member, and a reversing auxiliary device for assisting inversion of the front and back of the band member between the extruding device and the conveying device; With
The reversing auxiliary device includes two auxiliary rollers, the two auxiliary rollers are rotatable, and the two auxiliary rollers are arranged at intervals in the feeding direction of the band-shaped member. An apparatus for manufacturing a belt-shaped member in which the rotation axes of the two auxiliary rollers are perpendicular to the feeding direction of the belt-shaped member and perpendicular to the width direction of the belt-shaped member.   An operating position where the reversing auxiliary device assists the reversal of the belt-shaped member between the extrusion device and the conveying device, and a retreat position where the reversing auxiliary device is separated from the belt-shaped member conveyed between the pushing device and the conveying device. The manufacturing apparatus according to claim 1, which is movable between the two. It has a control device and a position detection sensor,
The manufacturing apparatus according to claim 2, wherein the control device has a function of receiving, from the position detection sensor, a detection signal indicating whether or not the inversion assisting device is in an operating position. The control device has a function of controlling the extrusion device,
The control device is
A function for storing the necessity of reversal of the belt-shaped member;
A function for determining the consistency between the necessity of reversal of the belt-shaped member and the detection signal as to whether or not the reversing auxiliary device is in an operating position;
The manufacturing apparatus according to claim 3, further comprising a function of stopping the extrusion device when it is determined that there is no consistency. A control device and a rotation detection sensor for detecting the rotation direction of each of the two auxiliary rollers;
The manufacturing apparatus according to claim 1, wherein the control device has a function of receiving a detection signal of the rotation direction of two auxiliary rollers from the rotation detection sensor. The control device has a function of controlling the extrusion device,
The control device is
A function of determining whether or not the rotation directions of the two auxiliary rollers are opposite to each other from a detection signal of the rotation direction of the two auxiliary rollers;
The manufacturing apparatus according to claim 5, further comprising a function of stopping the extrusion device when it is determined that the rotation directions of the two auxiliary rollers are not opposite to each other. An extrusion process in which a belt-shaped member made of unvulcanized rubber is extruded, and a cutting process in which the belt-shaped member is cut to obtain a sidewall member,
In the extruding step, an extruding device for extruding the band-shaped member, a conveying device for conveying the band-shaped member, and an inversion assisting device for assisting inversion of the front and back of the band-shaped member between the extruding device and the conveying device. Have been prepared,
The reversing auxiliary device includes two auxiliary rollers, the two auxiliary rollers are rotatable, and the two auxiliary rollers are arranged at intervals in the feeding direction of the band-shaped member. The rotational axes of the two auxiliary rollers are perpendicular to the feeding direction of the belt-like member and perpendicular to the width direction of the belt-like member,
In the extrusion process, the belt-shaped member is passed between the two auxiliary rollers, and the side wall member is manufactured between the extrusion device and the conveying device so that the front and back sides of the belt-shaped member are reversed. Method.   The manufacturing method according to claim 7, comprising: a main body member that vulcanizes the sidewall member to form a sidewall; and a clinching member that is vulcanized to form a clinch.

Images