JP2010069724A - Molding apparatus of belt molding and molding process of belt molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molding apparatus of a belt molding, one of which consistently perform a lamination molding process of a belt ring body through a canvas winding process. <P>SOLUTION: The belt molding 7 is formed by covering the belt ring body 5 which is a laminate comprising a compressed rubber layer 2, a core wire 3 and an extended rubber layer 4, with a canvas 6. The molding apparatus 100 includes a molding die 10 which has a groove 27 fitting to the belt molding 7 at its outer periphery, a canvas supply part 11 which supplies the canvas 6 onto the groove 27 of the molding die 10, a V core supply part 12 which supplies a V core 36 equivalent to the compressed rubber layer 2 to an outer periphery side of the canvas 6, a core wire supply part 13 which supplies a core wire 3 to an outer periphery side of the V core 36, and an upper core supply part 14 which supplies an upper core 47 equivalent to the extended rubber layer 4 to an outer periphery side of the core wire 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a belt molded body molding apparatus and a belt molded body molding method.

  In general, the manufacture of a wrapped V-belt covered with canvas is described in, for example, Patent Document 1 (Japanese Patent Laid-Open No. 10-323915) and Patent Document 2 (Japanese Patent Laid-Open No. 2000-280372). The following method is used.

  (1) First, a rubber sheet is wound around a molding drum provided in the molding machine, and a core wire is wound spirally at a predetermined pitch on the rubber sheet. And a rubber sheet is further wound around the outer periphery of this core wire, and a wide belt sleeve (refer to Drawing 8 of the above-mentioned patent documents 2) is produced. (2) Next, the belt sleeve is set on a cutting machine, and the belt sleeve is cut into a predetermined width. (3) Then, the belt sleeve is cut between the pair of pulleys provided in the skive machine and traveled under a predetermined tension while scraping the belt edge, so that the cross-sectional shape of the belt sleeve is a predetermined substantially trapezoidal shape. And (4) Next, the belt sleeve is stretched between a pair of pulleys provided in the cover winder, while maintaining a stretched state, a predetermined number of canvases of a predetermined width are pulled out and pressure-bonded to the belt sleeve. Is appropriately bent and attached to the belt sleeve.

  In the above general method for manufacturing a wrapped V-belt, it is necessary to remove the belt sleeve from the molding machine and go through the cutting machine, skive machine, cover winding machine, etc. There was room for improvement in terms of productivity.

  The present invention has been made in view of such various points, and its main object is to form a belt molded body that can be executed consistently from one layered forming process of a belt ring-shaped body to a winding process of a canvas with a single device. To provide an apparatus. Another object of the present invention is to provide a method for forming a belt molded body that can execute from the process of laminating a belt ring-shaped body to the step of winding a canvas at a time.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to a first aspect of the present invention, there is provided a belt molded body forming apparatus configured as follows. That is, the belt molded body is formed by covering a belt ring-shaped body, which is a laminate including at least a compressed rubber layer, a core wire, and an extended rubber layer, with a canvas. The molding apparatus includes a molding die having a groove fitted to the belt molded body on an outer periphery, a canvas supply unit that supplies the canvas onto the groove of the molding die, and a first rubber corresponding to the compression rubber layer. A first rubber material supply section that supplies a material to the outer peripheral side of the canvas; a core wire supply section that supplies the core wire to the outer peripheral side of the first rubber material; and a second rubber corresponding to the stretched rubber layer A second rubber material supply unit that supplies a rubber material to the outer peripheral side of the core wire. Thus, by supplying the canvas to the mold used for laminating and forming the belt ring-shaped body before supplying the first rubber material, the canvas from the step of laminating and forming the belt ring-shaped body. Can be performed consistently with a single device.

  The molding apparatus is further configured as follows. That is, the mold has a pair of flanges that define the groove in the axial direction. This mold is configured to be split in the axial direction. According to the above configuration, the pair of flanges does not hinder the release of the belt molded body formed by lamination in the groove of the molding die.

  The molding apparatus is further configured as follows. That is, the bottom surface of the groove of the mold is formed by alternately arranging a plurality of protrusions protruding from each of a pair of divided bodies constituting the mold. According to the above configuration, when the mold is divided and separated in the axial direction, the contact area between the inner peripheral surface of the belt molded body and the bottom surface of the groove of the mold is reliably reduced. The releasability of the belt molded body from the mold is further improved.

  The molding apparatus is further configured as follows. That is, a pressing portion that presses at least one of the canvas, the first rubber material, and the second rubber material against the mold is provided. According to the above configuration, since the belt molded body can be satisfactorily aligned with the groove of the molding die, the belt molded body can be brought closer to a desired cross-sectional shape more reliably.

  The molding apparatus is further configured as follows. That is, on the outer periphery of the mold, at least one end of the canvas, the first rubber material, and the second rubber material is provided with the groove of the mold during each supply. A fixing portion is provided for fixing to. According to the above configuration, at least one of the canvas, the first rubber material, and the second rubber material can be smoothly supplied to the mold.

  The molding apparatus is further configured as follows. In other words, a canvas folding portion is provided that bends a pair of canvases protruding from the groove of the molding die toward the back side of the belt ring-shaped body and presses them against the back side. According to the above configuration, a belt molded body corresponding to a so-called full-wrapped wrapped V-belt in which not only the inner peripheral surface and the side surface of the belt ring-shaped body but also the back surface is covered with the canvas can be formed.

  According to the second aspect of the present invention, a belt molded body formed by covering a belt ring-shaped body, which is a laminate including at least a compressed rubber layer, a core wire, and a stretched rubber layer, with a canvas is formed by the following method. Done in That is, a molding die having a groove on the outer periphery for fitting with the belt molded body is used. The canvas is fed onto the groove of the mold. A first rubber material corresponding to the compressed rubber layer is supplied to the outer peripheral side of the canvas. The core wire is supplied to the outer peripheral side of the first rubber material. A second rubber material corresponding to the stretched rubber layer is supplied to the outer peripheral side of the core wire. Thus, by supplying the canvas to the mold used for laminating and forming the belt ring-shaped body before supplying the first rubber material, the canvas from the step of laminating and forming the belt ring-shaped body. The winding process can be executed at once.

  The above molding is further performed as follows. That is, the mold has a pair of flanges that define the groove in the axial direction. This mold can be divided in the axial direction. According to the above method, the pair of flanges does not hinder the release of the belt molded body formed by lamination in the groove of the mold.

  The above molding is further performed as follows. That is, the bottom surface of the groove of the mold is formed by alternately arranging a plurality of protrusions protruding from each of a pair of divided bodies constituting the mold. According to the above method, when the mold is divided and separated in the axial direction, the contact area between the inner peripheral surface of the belt molded body and the bottom of the groove of the mold is surely reduced. The releasability of the belt molded body from the mold is further improved.

  The above molding is further performed as follows. That is, at least one of the canvas, the first rubber material, and the second rubber material is pressed against the mold. According to the above method, since the belt molded body can be satisfactorily aligned with the groove of the molding die, the belt molded body can be brought closer to a desired cross-sectional shape more reliably.

  The above molding is further performed as follows. That is, at least one of the ends of the canvas, the first rubber material, and the second rubber material is fixed to the groove of the mold during each supply. According to the above method, at least one of the canvas, the first rubber material, and the second rubber material can be smoothly supplied to the mold.

  The above molding is further performed as follows. That is, a pair of canvases protruding from the groove of the mold are folded toward the back side of the belt ring-shaped body and pressed against the back side. According to the above method, a belt molded body corresponding to a so-called full-wrapped wrapped V-belt in which not only the inner peripheral surface and the side surface of the belt ring-shaped body but also the back surface is covered with the canvas can be formed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a molding apparatus for a belt molded body according to an embodiment of the present invention. FIG. 6 is a cross-sectional view of a wrapped V-belt. First, the structure of the wrapped V-belt 1 will be described with reference to FIG.

  Each of the wrapped V-belts 1 shown in FIGS. 6A and 6B has an outer peripheral surface of an annular compression rubber layer 2 (for example, natural rubber, SBR, chloroprene, ethylene propylene rubber, hydrogenated nitrile rubber, etc.). A core wire 3 (a filamentous material such as polyester fiber, nylon fiber, or aramid fiber) is wound in a spiral shape, and a stretch rubber layer 4 (for example, natural rubber, SBR, chloroprene) is wound around the outer periphery of the core wire 3. , Ethylene propylene rubber, hydrogenated nitrile rubber, and the like, and a canvas 6 having a surface coated with rubber (for example, natural rubber, SBR, chloroprene, etc.) (for example, 1PLY). Alternatively, it is obtained by vulcanizing an unvulcanized belt molded body 7 that is coated with 2PLY). 6A shows a V-covered wrapped V-belt 1, and FIG. 6B shows a full-wrapped wrapped V-belt 1. FIG. The former, that is, the V-cover type wrapped V-belt 1 is a type of a wrapped V-belt 1 in which only the compression rubber layer 2 and the core wire 3 are covered with the canvas 6 and the stretched rubber layer 4 is not covered with the canvas 6. The latter, that is, a full-wrapped wrapped V-belt 1 is a type of wrapped V-belt 1 in which not only the compressed rubber layer 2 and the core wire 3 but also the stretched rubber layer 4 is covered with the canvas 6. As shown in FIG. 6 (b), the canvas 6 is slightly overlapped on the opposite side across the core wire 3 and the stretched rubber layer 4, as shown in FIG. All surfaces of the ring-shaped body 5 are covered with the canvas 6.

  For convenience of the following description, an inner peripheral surface 7a (belt bottom surface), a tapered inner peripheral surface 7b, a side surface 7c, and an outer peripheral surface 7d of the belt molded body 7 (wrapped V belt 1) shown in FIGS. 6 (a) and (b). (Back of belt) is defined as shown.

  Next, the structure of the shaping | molding apparatus 100 is demonstrated based on FIG. The molding apparatus 100 is an apparatus for molding the belt molded body 7 described above, and includes a molding die 10, a canvas supply unit 11, a V-core supply unit 12 (first rubber material supply unit), and a core wire. The supply part 13 and the upper core supply part 14 (2nd rubber material supply part) are provided as a main structure. Hereinafter, these configurations will be described in detail in order.

  The mold 10 is rotatably supported by the mold support 20. The mold support 20 includes a drive motor 21 for rotationally driving the mold 10 in the forward direction C (counterclockwise) and the reverse direction L (clockwise). The drive motor 21 is connected to the control device 101 of the molding apparatus 100, so that the control device 101 can rotate the mold support 20 in the normal rotation direction C and the reverse rotation direction L. FIG. 2 is a schematic view of a mold. 2B is a longitudinal sectional view of the mold 10, and FIG. 2A is a sectional view taken along line 1-1 in FIG. 2B. As shown in FIG. 2B, the mold 10 according to the present embodiment is formed in a ring shape and is configured to be splittable in the axial direction. Each of the pair of divided bodies 22 constituting the mold 10 includes an annular flange 23 and a plurality of protrusions 24 formed to protrude from the inner peripheral end of the flange 23 in the axial direction. Then, the plurality of protrusions 24 formed on one divided body 22 and the plurality of protrusions 24 formed on the other divided body 22 are arranged in the circumferential direction as shown in FIG. By arranging them alternately, the pair of divided bodies 22 are closely connected to each other. A groove that can be fitted into the belt molded body 7 by the outer peripheral surface 25 formed by a large number of protrusions 24 spread in the circumferential direction between the pair of flanges 23 and the opposing surfaces 26 of the pair of flanges 23. 27 is formed. In other words, the pair of flanges 23 define the groove 27 in the axial direction. The groove 27 is formed between the pair of flanges 23. Further, the bottom surface 27 a of the groove 27 is formed by the outer peripheral surface 25.

  The mold 10 includes a pair of disk members 28 disposed on the inner peripheral side of the flange 23, a rod 29 connected to the disk member 28 via a bearing, and the rod 29, and the rod 29 The mold 30 is supported by the mold support 20 through the cylinder 30 that advances and retreats along the extending direction of the rod 29. In the present embodiment, the disk member 28, the rod 29, and the cylinder 30 are all provided in pairs at positions that sandwich the protrusion 24 in the axial direction. However, instead of providing the rod 29 and the cylinder 30 as a pair, a configuration in which the rod 29 and the cylinder 30 are provided only on one side in the axial direction when viewed from the protrusion 24 is also conceivable. FIG. 3 is a view similar to FIG. 2 and showing a state where the mold is divided. As shown in FIG. 3, when the pair of rods 29 are retracted in the direction away from each other by the operation of the cylinder 30, the mold 10 is divided in the axial direction and the pair of divided bodies 22 are separated in the axial direction. It has become. This cylinder 30 is provided with a drive source (not shown) (hydraulic pump and control valve, etc.), and this drive source is connected to the control device 101, so that the control device 101 operates the cylinder 30, and thus advances and retreats the rod 29. Can be appropriately controlled. As shown in FIG. 3, the flange 23 has a tapered surface 23 b corresponding to the tapered inner peripheral surface 7 b of the belt molded body 7 and a flat surface 23 c corresponding to the side surface 7 c of the belt molded body 7. Thus, the groove 27 can be uniformly adhered to the belt molded body 7. In other words, the mold 10 in which the groove 27 having a cross-sectional outline substantially the same as the cross-sectional shape of the belt molded body 7 corresponding to the wrapped V-belt 1 to be molded is selectively used.

  Further, as shown in FIG. 1, a ring clamp 31 (fixing portion) is provided on the outer periphery of the molding die 10. The ring clamp 31 is configured so that the canvas 6 or the like supplied onto the groove 27 of the molding die 10 can be locked and fixed at an arbitrary position on the outer periphery of the groove 27 of the molding die 10 during each supply. The main configuration includes an unillustrated clamp and a drive motor that drives opening and closing of the clamp. This drive motor is connected to the control device 101, so that the control device 101 can appropriately control the opening and closing of the ring clamp 31.

  In the present embodiment, as the mold 10, a wrapped V-belt 1 to be manufactured is used with the belt length as it is. Therefore, when the length of the wrapped V-belt 1 to be manufactured is long, the molding die 10 becomes larger in conjunction with it, and the weight increases, making it difficult to handle. Therefore, in the present embodiment, the mold 10 is formed of, for example, aluminum or resin. According to this, even if the belt length of the wrapped V-belt 1 to be manufactured is long, an increase in the weight of the mold 10 associated therewith can be suppressed.

  The canvas supply unit 11 supplies the canvas 6 to the groove 27 of the mold 10, and includes a canvas bobbin support 33 that rotatably supports the canvas bobbin Bh, and the canvas. A canvas delivery section 34 that delivers the end of the canvas 6 fed out from the bobbin Bh to the ring clamp 31 is provided as a main configuration. The canvas delivery section 34 includes a drive motor (not shown) as a drive source for delivering the end of the canvas 6 fed from the canvas bobbin Bh to the ring clamp 31, and this drive motor is also controlled by the control described above. Connected to the device 101, the control device 101 can appropriately control the delivery of the canvas 6 to the ring clamp 31 by the canvas delivery unit 34. Between the canvas bobbin Bh supported by the canvas bobbin support 33 and the canvas delivery part 34, a guide 35 for stabilizing the traveling path of the canvas 6 fed from the canvas bobbin Bh is provided. . Both the canvas delivery part 34 and the guide 35 are supported by the body frame 102 of the forming apparatus 100. The canvas 6 wound around the canvas bobbin Bh is cut in another process so as to fit into the groove 27 of the mold 10 and has a predetermined width. Specifically, the width of the canvas 6 wound around the canvas bobbin Bh can be expressed as a value obtained by dividing the cross-sectional area of the canvas 6 shown in FIG.

  The V-core supply unit 12 supplies a V-core 36 (first rubber material) corresponding to the compressed rubber layer 2 shown in FIG. 6A to the outer peripheral side of the canvas 6. A V-core bobbin support 38 that rotatably supports the bobbin 37, and an end part of the V-core 36 fed out from the V-core bobbin 37 is cut into a bevel and delivered to the ring clamp 31. And as a main configuration. The V-core delivery unit 39 drives a cutter for cutting the end of the V-core 36 into a bevel and serves as a drive source for the operation of delivering to the ring clamp 31 while gripping the end of the cut V-core 36. The drive motor is also connected to the above-described control device 101, so that the control device 101 cuts the V core 36 by the V core delivery unit 39 and V by the V core delivery unit 39. Delivery of the core 36 to the ring clamp 31 can be appropriately controlled. The V core 36 wound around the V core bobbin 37 is cut and skived in another process so as to be fitted into the groove 27 of the mold 10, and has a predetermined width and a predetermined cross-sectional shape. It has become. Specifically, the cross-sectional shape of the V-core 36 is substantially the same as the cross-sectional shape of the compressed rubber layer 2 already shown in FIG. 6A when wound around the V-core bobbin 37.

  The core wire supply unit 13 supplies the core wire 3 shown in FIG. 6A to the outer peripheral side of the V-core 36, and supports the core bobbin Bs rotatably. 40, a drive unit 41 for sending out the core wire 3 from the core wire bobbin Bs, and a dancer unit 42 for applying a predetermined tension to the core wire 3 sent out from the core wire bobbin Bs by the drive unit 41. Then, the core wire 3 to which tension is applied by the dancer part 42 is drawn out to reach the outer periphery of the V core 36, and the core wire 3 is traversed with respect to the V core 36 when the mold 10 is rotated. The main structure includes a core wire catcher 43 that cuts the core wire and a hot presser 44 for welding the core wire 3 drawn by the core wire catcher 43 onto the V core 36. The drive unit 41 includes a drive pulley to which a drive motor (not shown) is coupled, and a driven pulley that is a slave to the drive pulley. The drive motor connected to the drive pulley is connected to the control device 101 so that the control device 101 can appropriately control the drawing speed and the drawing amount of the drawing of the core wire 3 from the core bobbin Bs. It has become. The core wire catcher 43 includes a core wire housing portion 45 configured to hold the core wire 3 and to be able to cut the core wire 3, and a swing arm 46 that supports the core wire housing portion 45 so as to be swingable. And a plurality of drive motors (not shown) for driving the core wire housing 45 and the swing arm 46. The plurality of drive motors are also connected to the control device 101, so that the control device 101 holds the core wire 3 by the core wire catcher 43, cuts the core wire 3, swings the swing arm 46, and the core wire 3. The traverse of the V core 36 can be controlled as appropriate.

  The upper core supply unit 14 has a configuration substantially similar to that of the V core supply unit 12. That is, the upper core supply unit 14 supplies an upper core 47 (second rubber material) corresponding to the stretched rubber layer 4 shown in FIG. 6A to the outer peripheral side of the core wire 3. The upper core bobbin support 49 that rotatably supports the upper core bobbin 48 and the end of the upper core 47 fed out from the upper core bobbin support 49 are cut into a bevel and delivered to the ring clamp 31. A core delivery unit 50 is provided as a main configuration. The upper core transfer section 50 drives a cutter for cutting the end of the upper core 47 into a bevel and serves as a drive source for the operation of transferring to the ring clamp 31 while gripping the end of the cut upper core 47. The drive motor is also connected to the above-described control device 101, so that the control device 101 cuts the upper core 47 by the upper core delivery unit 50 and the upper by the upper core delivery unit 50. Delivery of the core 47 to the ring clamp 31 can be appropriately controlled. The upper core 47 wound around the upper core bobbin 48 is cut in another process so as to be fitted into the groove 27 of the mold 10 to have a predetermined width and a predetermined cross-sectional shape. Yes. Specifically, the width of the upper core 47 is substantially the same as the width of the stretched rubber layer 4 already shown in FIG. 6A when wound on the upper core bobbin 48.

  The molding apparatus 100 further includes a pressing roll unit 51 (pressing unit) that presses the canvas 6, the V core 36, and the upper core 47 against the molding die 10. The pressing roll 51 includes a roll 52 that can be fitted into the groove 27 of the mold 10, a swingable roll support 53 that rotatably supports the roll 52, and a roll support 53. An unillustrated drive motor as a swinging drive source is provided as a main configuration. This drive motor is also connected to the above-described control device 101, so that the control device 101 can appropriately control the proximity and separation of the roll 52 with respect to the groove 27 of the mold 10.

  The control device 101 includes a CPU (Central Processing Unit), which is an arithmetic processing device, a ROM (Read Only Memory) in which a control program executed by the CPU and data used for the control program are stored. , A RAM (Random Access Memory) for temporarily storing various data during program execution. Then, the control program stored in the ROM is read into the CPU, and the control program is executed on the CPU, so that the CPU controls the operation of the molding apparatus 100 as described in the control program. It is designed to function as a means. In addition, the control device 101 includes an input unit (not shown) such as a touch panel, for example, and the operator can appropriately give an instruction to the CPU via the input unit.

  Next, the operation of this embodiment will be described. FIG. 4 is an explanatory diagram of a molding process of the belt molded body.

  First, as shown in FIG. 1, the operator who manages the molding apparatus 100 sets the V-core bobbin 37 on the V-core supply unit 12, pulls out the end of the V-core 36 from the V-core bobbin 37, The end is set in the V-core delivery unit 39. Similarly, the operator sets the upper core bobbin 48 in the upper core supply unit 14, pulls out the end portion of the upper core 47 from the upper core bobbin 48, and sets the end portion in the upper core delivery unit 50. Further, the operator sets the canvas bobbin Bh in the canvas supply unit 11, pulls out the end of the canvas 6 from the canvas bobbin Bh, and sets the end in the canvas delivery unit 34. Further, the operator sets the core bobbin Bs in the core wire supply unit 13, pulls out the end of the core wire 3 from the core bobbin Bs, and threades the core wire 3 onto the drive unit 41 and the dancer unit 42. Further, the end of the core wire 3 is set in the core wire catcher 43.

  Next, the operator attaches the mold 10 suitable for the profile of the wrapped V-belt 1 to be manufactured to the mold support 20. The profile of the wrapped V-belt 1 is, for example, the cross-sectional shape of the wrapped V-belt 1 shown in FIG. In addition, as described above, the mold 10 is formed of a material having a small specific gravity such as aluminum or resin, and thus is designed in consideration of the operator's work.

  When the above preparation is completed, the operator operates the touch panel to start the following molding process of the belt molded body 7 by the molding apparatus 100. That is, the control device 101 controls each part of the molding device 100 as follows.

(Cleaning up the canvas 6)
First, the mold 10 is rotated and the ring clamp 31 comes close to the canvas delivery portion 34. Next, the canvas delivery section 34 delivers the end of the canvas 6 to the ring clamp 31 and the ring clamp 31 clamps the end. Then, the mold 10 is rotated in the forward rotation direction C, and when the ring clamp 31 passes the pressing roll portion 51, the roll support 53 swings, and as shown in FIG. The pressing of the canvas 6 to the forming die 10 by 52 starts. By this pressing, the canvas 6 is released from the flat state and is bent along the contour of the groove 27 of the mold 10. When the mold 10 is rotated once, the canvas delivery section 34 cuts the canvas 6, the mold 10 is further rotated half a circle, and the roll 52 sufficiently presses the canvas 6 against the mold 10. As a result, the canvas 6 is strongly wound on the groove 27 of the mold 10 and the canvas 6 is in a state along the cross-sectional shape of the groove 27 of the mold 10 as shown in FIG. The Then, the roll support 53 swings again, and the roll 52 is retracted to the original position indicated by the solid line in FIG.

(V winding process of V core 36)
Next, the mold 10 is rotated so that the ring clamp 31 comes close to the V-core delivery portion 39. The V-core delivery section 39 cuts the end of the V-core 36 into a bevel and delivers it to the ring clamp 31. The ring clamp 31 clamps the end. Then, the mold 10 is rotated in the forward rotation direction C, and the roll support 53 swings when the ring clamp 31 passes the pressing roll portion 51, and as shown in FIG. The pressing of the V core 36 to the mold 10 (the canvas 6) by 52 starts. When the mold 10 is rotated 0.9 times, the V-core delivery unit 39 cuts the V-core 36 into a bevel, the mold 10 is further rotated 0.1 times, and the roll 52 rotates the V-core 36 into the mold. Press sufficiently against 10. Thereby, the V core 36 is strongly wound around the outer periphery of the canvas 6. Then, the roll 52 is retracted in the same manner as described above.

(Spinning process for core 3)
Next, the core wire catcher 43 comes close to the hot presser 44, and the hot presser 44 welds the end of the core wire 3 held by the core wire catcher 43 onto the V core 36. Then, the mold 10 rotates in the reverse rotation direction L at a predetermined rotational speed, and the core wire catcher 43 traverses the core wire 3 with respect to the V core 36, whereby the core wire 3 is shown in FIG. As shown, it is spirally wound on the V core 36. When a predetermined time has elapsed, the rotation of the mold 10 is stopped by a brake mechanism (not shown), and the hot presser 44 welds or thermocompresses the end portion (terminal portion) of the core wire 3 to the adjacent core wire 3. At the same time, the core wire catcher 43 cuts the core wire 3. For cutting, an ultrasonic cutter, an air nipper, or the like can be used.

(Wounding process of upper core 47)
Then, the mold 10 rotates and the ring clamp 31 comes close to the upper core delivery unit 50. And the upper core delivery part 50 cuts the edge part of the upper core 47 into a bevel, and delivers it with respect to said ring clamp 31, and the ring clamp 31 clamps this edge part. Next, the mold 10 is rotated in the forward rotation direction C, and when the ring clamp 31 passes the pressing roll portion 51, the roll support 53 swings, and as shown in FIG. The pressing of the upper core 47 to the molding die 10 (core wire 3) by 52 starts. When the mold 10 is rotated 0.9 times, the upper core delivery section 50 cuts the upper core 47 into a bevel, the mold 10 is further rotated 0.1 times, and the roll 52 rotates the upper core 47 into the mold. Press sufficiently against 10. Thereby, the upper core 47 is strongly wound around the outer periphery of the core wire 3.

(Recovery of belt molded body 7)
Through the above steps, the unvulcanized belt molded body 7 is formed in the groove 27 of the mold 10. Next, as shown in FIG. 2B, the pair of divided bodies constituting the mold 10 are formed by retracting the pair of rods 29 away from each other by the operation of the cylinder 30 so that the state shown in FIG. 22 is separated and separated in the axial direction of the mold 10, and the belt molded body 7 generated in the groove 27 stays on the protrusion 24 of one of the pair of divided bodies 22. Or fall by its own weight. When the belt molded body 7 remains on the protrusion 24 as shown in the figure, the operator removes the belt molded body 7 from the protrusion 24 and collects it. When the belt molded body 7 falls due to its own weight, the operator collects the dropped belt molded body 7 as it is. In the former case, that is, when the belt molded body 7 remains on the protrusion 24, the sum of the contact areas of the inner peripheral surface 7a of the belt molded body 7 and the outer peripheral surface 25 of the protrusion 24 is the divided body. Compared with 22 before division and separation, it is substantially halved.

(Summary)
As described above, in the above-described embodiment, the molding apparatus 100 for the belt molded body 7 is configured as follows. That is, the belt molded body 7 is formed by covering the belt ring-shaped body 5, which is a laminate including the compressed rubber layer 2, the core wire 3, and the stretched rubber layer 4, with the canvas 6. The molding apparatus 100 includes a molding die 10 having a groove 27 fitted on the outer periphery of the belt molding body 7, a canvas supply unit 11 for supplying the canvas 6 onto the groove 27 of the molding die 10, and the compression. A V-core supply unit 12 that supplies a V-core 36 corresponding to the rubber layer 2 to the outer peripheral side of the canvas 6; a core-wire supply unit 13 that supplies the core 3 to the outer peripheral side of the V-core 36; And an upper core supply unit 14 for supplying an upper core 47 corresponding to the rubber layer 4 to the outer peripheral side of the core wire 3. Thus, by supplying the canvas 6 to the mold 10 used for laminating and forming the belt ring-shaped body 5 before the supply of the V-core 36, the process of laminating and forming the belt ring-shaped body 5 is performed. Up to the winding process of the canvas 6 can be performed consistently with one apparatus.

  In the above embodiment, the canvas 6 is supplied to the mold 10 before the V core 36 is supplied. Instead, the canvas 6 is supplied to the mold 10 and the V core 36 is supplied. The structure which supplies simultaneously can be considered. Specifically, when the canvas 6 and the V core 36 are merged just before being supplied to the mold 10, and when the canvas 6 and the V core 36 are already merged, they are wound around the bobbin and fed together. A case can be considered.

  The molding apparatus 100 is further configured as follows. That is, the mold 10 has a pair of flanges 23 that define the groove 27 in the axial direction. The mold 10 is configured to be separable in the axial direction. According to the above configuration, the pair of flanges 23 do not hinder the release of the belt molded body 7 formed by lamination in the groove 27 of the mold 10.

  The molding apparatus 100 is further configured as follows. That is, the bottom surface 27 a of the groove 27 of the mold 10 is formed by alternately arranging a plurality of protrusions 24 protruding from each of the pair of divided bodies 22 constituting the mold 10 in the circumferential direction. According to the above configuration, when the molding die 10 is divided and separated in the axial direction, the contact area between the inner peripheral surface 7 a of the belt molded body 7 and the bottom surface 27 a of the groove 27 of the molding die 10. Is reliably reduced (halved in the present embodiment), so that the releasability of the belt molded body 7 from the mold 10 is further improved.

  The molding apparatus 100 is further configured as follows. That is, a pressing roll portion 51 that presses the canvas 6, the V core 36, and the upper core 47 against the mold 10 is provided. According to the above configuration, the belt molded body 7 can be satisfactorily aligned with the groove 27 of the molding die 10, so that the belt molded body 7 can be brought closer to a desired cross-sectional shape more reliably. .

  The molding apparatus 100 is further configured as follows. That is, on the outer periphery of the mold 10, the ends of the canvas 6, the V core 36, and the upper core 47 are fixed to the groove 27 of the mold 10 during each supply. A ring clamp 31 is provided. According to the above configuration, the canvas 6, the V core 36, and the upper core 47 can be smoothly supplied to the mold 10.

  In addition, the structure which abbreviate | omits said press roll part 51 and the ring clamp 31 is also considered.

  Moreover, the said embodiment is excellent in the following (1)-(8) points from another viewpoint.

(1) Since the molding apparatus 100 can consistently execute the process from the lamination molding process of the belt ring-shaped body 5 to the winding process of the canvas 6 in this apparatus by one apparatus, it is representative of attaching and detaching the belt to and from the apparatus. The operator's cumbersome work is greatly reduced.
(2) Compared with Patent Document 2, the molding apparatus 100 according to this embodiment forms the wrapped V-belt 1 one by one as shown in FIG. Work in process is suppressed.
(3) Since there is no cutting step of the belt ring-shaped body 5 in the molding apparatus 100, the belt ring-shaped body 5 does not have an opportunity to come into contact with water required for cutting. This eliminates the need for a drying step and eliminates the problem of belt swelling due to residual water.
(4) Since the molding die 10 according to the profile of the belt molded body 7 to be molded is used, the belt molded body 7 is very excellent in the dimensional accuracy of the belt length, and therefore, the belt ring-shaped body 5 and the belt molded body 7. The need for measuring is considerably reduced.
(5) Since it is not necessary to remove from the shaping | molding die 10 in the state of the belt ring-shaped body 5, use of the glue for maintaining the arrangement | sequence state of the core wire 3 can be abbreviate | omitted.

  Although the preferred embodiments of the present invention have been described above, the above embodiments can be implemented with the following modifications.

<First modification>
FIG. 5 is an explanatory diagram of a canvas folding process. The forming apparatus 100 according to this modification further includes a canvas bent portion 60 indicated by a broken line in FIG. The canvas bent portion 60 is configured to bend the pair of canvases 6 protruding from the groove 27 of the mold 10 to the back surface 5a side of the belt ring-shaped body 5 and press against the back surface 5a. In this modification, the width of the canvas 6 wound around the canvas bobbin Bh is set to be larger than that in the above embodiment, and therefore, as shown in FIG. In this state, the canvas 6 protrudes sufficiently from the groove 27 to both sides in the axial direction of the mold 10. The canvas folding section 60 is folded from the traveling space of the ring clamp 31 so that the six types of folding jigs 61 to 66 and the folding jigs 61 to 66 do not interfere with the ring clamp 31. An unillustrated retracting mechanism for retracting the bending jigs 61 to 66 and a drive source for the retracting mechanism are mainly provided. The control device 101 can appropriately control the advance and retreat of the bending jigs 61 to 66 via this drive source.

(Roll down)
The first bending jig 61 shown in FIG. 5A has an inclined surface 61 a, and the first bending jig 61 advances toward the belt ring-shaped body 5 along the axial direction of the mold 10. Thus, the inclined surface 61 a slightly raises the end 6 a of the canvas 6 protruding from the groove 27 outward in the radial direction of the mold 10.

(Winding down)
The second bending jig 62 shown in FIG. 5 (b) has a tapered outer peripheral surface 62a, and the second bending jig 62 rotates in the axial direction of the mold 10 toward the belt ring-shaped body 5 while rotating. By advancing, the taper outer peripheral surface 62 a is tilted so that the end portion 6 a of the canvas 6 faces the back surface 5 a of the belt ring-shaped body 5.

(Lie down under the roll)
The third bending jig 63 shown in FIG. 5C has a taper outer peripheral surface 63a, and the third bending jig 63 rotates in the radial direction of the mold 10 toward the belt ring-shaped body 5 while rotating. By advancing, the taper outer peripheral surface 63a presses the end portion 6a of the canvas 6 against the back surface 5a of the belt ring-shaped body 5, and lays it in close contact.

(Roll down)
The fourth bending jig 64 shown in FIG. 5D has an inclined surface 64 a, and the fourth bending jig 64 advances toward the belt ring-shaped body 5 in the advancing direction of the first bending jig 61. The inclined surface 64 a causes the other end portion 6 b of the canvas 6 protruding from the groove 27 to stand slightly outward in the radial direction of the mold 10.

(Winding down)
The fifth bending jig 65 shown in FIG. 5 (e) has a tapered outer peripheral surface 65a, and the second bending jig 65 moves toward the belt ring-shaped body 5 while the fifth bending jig 65 rotates. By advancing in the direction opposite to the advancing direction of 62, the tapered outer peripheral surface 65 a tilts the end portion 6 b of the canvas 6 so as to face the back surface 5 a of the belt ring-shaped body 5.

(Lie down under the roll)
The sixth bending jig 66 shown in FIG. 5 (f) has a tapered outer peripheral surface 66a, and the sixth bending jig 66 rotates in the radial direction of the mold 10 toward the belt ring-shaped body 5 while rotating. By advancing, the taper outer peripheral surface 66a presses the end portion 6b of the canvas 6 against the back surface 5a and the end portion 6a of the belt ring-shaped body 5, and lays it in close contact. As a result, as shown in FIG. 5 (f), the ends 6a and 6b of the canvas 6 have a partially overlapping relationship.

  As described above, in this modification, the pair of canvas 6 protruding from the groove 27 of the mold 10 is bent toward the back surface 5a side of the belt ring-shaped body 5 and pressed against the back surface 5a. The unit 60 is provided. According to the above configuration, the belt molded body 7 corresponding to the so-called fully-wrapped wrapped V-belt 1 in which not only the inner peripheral surface and the side surface of the belt ring-shaped body 5 but also the back surface 5a is covered with the canvas 6 is molded. it can.

<Second modification>
Further, as shown in FIGS. 6A and 6B, the belt molded body 7 according to the above embodiment includes a belt ring-shaped body 5 including a compressed rubber layer 2, a core wire 3, and an extended rubber layer 4, and a canvas. 6, in addition to this, a configuration in which an adhesive rubber layer is provided on the outer peripheral side of the compressed rubber layer 2 to ensure sufficient adhesion of the core wire 3 to the compressed rubber layer 2. Is also possible. In this case, the said adhesive rubber layer should just be affixed on the outer peripheral side of the V core 36 in the state wound around the V core bobbin 37, for example.

Configuration schematic diagram of molding apparatus for belt molded body according to one embodiment of the present invention Schematic diagram of mold It is a figure similar to FIG. 2, Comprising: The figure which shows the state by which the shaping | molding die was divided | segmented Explanatory drawing of the molding process of the belt molding Illustration of canvas folding process Cross section of wrapped V-belt

Explanation of symbols

2 Compression rubber layer 3 Core wire 4 Stretch rubber layer 5 Belt ring-shaped body 6 Canvas 7 Belt molding 10 Mold 11 Canvas supply unit 12 V core supply unit 13 Core wire supply unit 14 Upper core supply unit 27 Groove 36 V core 47 Upper Core 100 forming device

Claims (12)

An apparatus for forming a belt molded body comprising a belt ring-shaped body, which is a laminate including at least a compressed rubber layer, a core wire, and an extended rubber layer, covered with a canvas,
A mold having an outer periphery with a groove to be fitted with the belt molded body;
A canvas supply section for supplying the canvas onto the groove of the mold;
A first rubber material supply section for supplying a first rubber material corresponding to the compressed rubber layer to the outer peripheral side of the canvas;
A core wire supply section for supplying the core wire to the outer peripheral side of the first rubber material;
A second rubber material supply section for supplying a second rubber material corresponding to the stretched rubber layer to the outer peripheral side of the core wire;
Comprising
An apparatus for forming a belt molded body. It is a shaping | molding apparatus of the belt molded object of Claim 1, Comprising:
The mold has a pair of flanges defining the groove in the axial direction;
This mold is configured to be split in the axial direction.
An apparatus for forming a belt molded body. It is a shaping | molding apparatus of the belt molded object of Claim 2, Comprising:
The bottom surface of the groove of the mold is formed by alternately arranging a plurality of protrusions protruding from each of the pair of divided bodies constituting the mold, in the circumferential direction.
An apparatus for forming a belt molded body. It is a shaping | molding apparatus of the belt molded object in any one of Claims 1-3,
A pressing portion that presses at least one of the canvas, the first rubber material, and the second rubber material against the mold;
An apparatus for forming a belt molded body. It is a shaping | molding apparatus of the belt molded object in any one of Claims 1-4,
At the outer periphery of the mold, at least one end of the canvas, the first rubber material, and the second rubber material is placed with respect to the groove of the mold during each supply. Fixed part to be fixed
An apparatus for forming a belt molded body. It is a shaping | molding apparatus of the belt molded object in any one of Claims 1-5,
A canvas bent portion that folds a pair of canvases protruding from the groove of the mold to the back side of the belt ring-shaped body and presses them against the back side;
An apparatus for forming a belt molded body. A method for forming a belt molded body comprising a belt ring-shaped body, which is a laminate including at least a compressed rubber layer, a core wire, and an extended rubber layer, covered with a canvas,
Using a molding die having a groove fitted to the belt molded body on the outer periphery,
Supplying the canvas onto the groove of the mold;
Supplying a first rubber material corresponding to the compressed rubber layer to the outer peripheral side of the canvas;
Supplying the core wire to the outer peripheral side of the first rubber material;
Supplying a second rubber material corresponding to the stretched rubber layer to the outer peripheral side of the core wire;
A method for forming a belt molded body, comprising: A method for forming a belt molded body according to claim 7,
The mold has a pair of flanges defining the groove in the axial direction;
This mold can be divided in the axial direction.
A method for forming a belt molded body, comprising: A method for forming a belt molded body according to claim 8,
The bottom surface of the groove of the mold is formed by alternately arranging a plurality of protrusions protruding from each of a pair of divided bodies constituting the mold.
A method for forming a belt molded body, comprising: A method for forming a belt molded body according to any one of claims 7 to 9,
Pressing at least one of the canvas, the first rubber material, and the second rubber material against the mold;
A method for forming a belt molded body, comprising: A method for forming a belt molded body according to any one of claims 7 to 10,
At least one end of the canvas, the first rubber material, and the second rubber material is fixed to the groove of the mold during each supply.
A method for forming a belt molded body, comprising: A method for forming a belt molded body according to any one of claims 7 to 11,
Bending a pair of canvases protruding from the groove of the molding die to the back side of the belt ring-shaped body, and pressing the back against the back surface,
A method for forming a belt molded body, comprising:

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