JP3726014B2 - V-ribbed belt manufacturing method and vulcanization sleeve pre-processing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a V-ribbed belt manufacturing method and a vulcanization sleeve pre-processing apparatus. Specifically, before grinding a V-shaped groove on the surface of the vulcanization sleeve, the rough skin layer of the vulcanization sleeve is previously ground by cutting and rough grinding. The present invention relates to a V-ribbed belt manufacturing method and a vulcanizing sleeve pre-processing apparatus in which a flat surface is removed and the sleeve is divided and cut into small-width vulcanizing sleeves and then the sleeves are ground into V-shaped grooves.
[0002]
[Prior art]
For example, as shown in Japanese Patent Publication No. 52-17552, a conventional V-ribbed belt has a mandrel with a canvas (herein referred to as a cover canvas), an upper rubber layer (herein referred to as a stretch rubber layer and an adhesive rubber layer), a tensile body. (Referred to here as a core wire), a reverse molded body in which a lower rubber layer (referred to herein as a compressed rubber layer) is sequentially laminated, and the resulting vulcanized sleeve is formed into a cylindrical surface portion and a plurality of V shapes. It has been manufactured by a grinder method in which a plurality of V-shaped grooves are ground by a grinding wheel in which portions having grooves are connected and integrated.
[0003]
In recent years, for example, as shown in Japanese Examined Patent Publication No. 07-037084, a long V-ribbed belt has a vulcanization sleeve suspended around a driving roll and a driven roll, and is rotated so that the surface of the running vulcanization sleeve is covered. It is manufactured by a method of grinding into V-shaped grooves with a grinding wheel.
[0004]
In detail, the following grinding method is known in which the vulcanization sleeve is divided into small widths, aiming at high quality and corresponding to a variety of low-volume production. One is a method of grinding a narrow sleeve into a plurality of V-grooves using a single grinding wheel having a plurality of V-shaped grooves, and the other is a method of further grinding a narrow sleeve into a V-shaped groove. A grinding method or the like that performs consistent processing using a plurality of wheels having coarse and fine.
[0005]
[Problems to be solved by the invention]
However, in the above-mentioned one-shot grinding method, the grinding wheel is ground with a fine # 80 to # 250 grindstone that matches the final finish, and grinding efficiency is reduced while suppressing heat generation during grinding. As a result, the processing time is long and the shape quality is limited. Further, in other integrated processing methods, when the sleeve width is 200 mm or more, it is difficult to achieve stable production by matching the pitches of the rib crests with coarse and fine grinding belts. This is because the sleeve shrinks due to the degree of heat generation during grinding, and as a result, the pitch of the rib crests fluctuates, which leaves a problem in further improving the grinding efficiency.
[0006]
In view of the above, it is required to suppress heat generation during grinding of the vulcanized sleeve, and an attempt to reduce the grinding load that becomes the heat generation source or an attempt not to store generated heat has been desired as a new grinding method. In particular, the rib crest of the grinding wheel enters the vulcanization sleeve, the bottom of the rib crest of the grinding wheel reaches the rough skin layer on the surface of the vulcanization sleeve, and the crest and crest of the grinding wheel are applied over the entire surface. It was known that the grinding load was large at the final stage of grinding contacting the sulfur sleeve, and heat storage proceeded to the vulcanization sleeve. Reducing the grinding load and shortening the load duration have become issues.
[0007]
The present invention improves such problems and reduces the load of grinding to the V-shaped groove of the compressed rubber layer, which is the lower rubber layer portion, with the vulcanized sleeve of the V-ribbed belt, suppresses heat storage, and the total grinding time. It is another object of the present invention to provide a V-ribbed belt manufacturing method and a vulcanization sleeve pre-processing apparatus that are excellent in shape accuracy and shorten grinding total processing time.
[0008]
[Means for Solving the Problems]
That is, in the invention described in claim 1 of the present invention, the stretch rubber layer having the cover canvas laminated on the surface, the adhesive rubber layer in which the core wire is embedded along the longitudinal direction of the belt, and the compressed rubber layer adjacent to the adhesive rubber layer. In a method for manufacturing a V-ribbed belt having a plurality of rib portions extending in the circumferential direction of the belt, a rubber molded body is produced by winding a core wire around at least an adhesive rubber layer and laminating a compressed rubber layer thereon, and the obtained rubber molding A molding process to vulcanize the body and finish into a vulcanized sleeve;
After the rough skin layer of the vulcanization sleeve is cut with a blade, the surface is ground flat using a coarse grindstone, and further divided into narrow vulcanization sleeves of a predetermined width,
A V-groove processing step of grinding the narrow vulcanization sleeve into one or a plurality of V-shaped grooves. In particular, paying attention to the rough skin layer in the vulcanized sleeve, cutting with a cutting tool reduces the removal load and shortens the removal time, and flat grinding with a rough grindstone shortens the grinding time, thereby generating heat during grinding of the vulcanized sleeve. Is suppressed. Furthermore, by separating the process of removing the rough skin from the V-groove process of the vulcanized sleeve and making it a preliminary process that is the previous process, continuous heat generation during grinding of the vulcanized sleeve can be avoided, and heat storage in the vulcanized sleeve This makes it possible to manufacture a V-ribbed belt that relaxes the above, and suppresses heat generation of the vulcanization sleeve.
[0009]
The method for producing a V-ribbed belt according to claim 2 of the present invention is such that after the rough skin layer of the vulcanization sleeve is cut with a blade in claim 1, the surface thereof is ground flat using a grindstone having a coarse particle size. The thickness of the rough skin layer after the preliminary processing of the sleeve is made 0.05 to 0.3 mm thicker than the thickness after the V-groove processing step. As a result, it is possible to shorten the final finish grinding time in the V-grooving process, which is a separate process in the subsequent process, and to minimize heat generation of the vulcanization sleeve during grinding, thereby suppressing heat accumulation by discontinuous grinding. .
[0010]
The method for manufacturing a V-ribbed belt according to claim 3 of the present invention is to divide a rough skin layer with a blade and a step of grinding the surface flat with a coarse grindstone into vulcanized sleeves having a predetermined width. Integrated into the cutting process to obtain a narrow vulcanized sleeve and made into a preliminary machining process, and integrated equipment was built, thereby complementing the minus that separated rough grinding from the V groove machining process, and total grinding The time can be shortened, and a series of process times can be further shortened to improve productivity.
[0011]
In the vulcanization sleeve pre-processing apparatus according to claim 4 of the present application, before grinding the V-shaped groove on the surface of the vulcanized vulcanization sleeve, the rough skin layer of the vulcanization sleeve is removed in advance and the narrow-width addition having a flat surface is performed. In pre-processing the sulfur sleeve,
A biaxial stretch unit that stretches the vulcanization sleeve between two shafts and rotates,
A cutting means for cutting the rough skin layer by pressing the blade edge against the rough skin layer that becomes the outer surface of the vulcanization sleeve, a grinding means for finishing the surface of the vulcanization sleeve to a flat surface using a coarse grain, A cutter unit comprising a cutting means for dividing the sulfur sleeve into individual narrow vulcanization sleeves;
A cutter base that shares the cutting means, grinding means, and cutting means of the cutter unit, and a direction in which the cutter base approaches and separates from the vulcanization sleeve stretched on the biaxial stretching unit (X-axis direction) And a servo table unit comprising moving means for moving along the width direction (Y-axis direction) of the vulcanization sleeve. First, the biaxial stretching unit prevents the vulcanization sleeve, which is a workpiece, from meandering, maintains stable rotation, and enables machining. Next, the cutter unit attaches the cutting, grinding, and cutting processing tools to a common cutter base, and shares the common feed operation of each processing tool, enabling the creation of a simple, high-speed and inexpensive mechanism. Further, the servo table unit drives the cutter base in the X-axis and Y-axis directions, and enables control under each optimum processing condition for each processing tool. As a result, it is possible to reduce the operating time as an integrated process device and to reduce the cost of a space-saving device with excellent workability by eliminating inter-process work.
[0012]
The vulcanization sleeve preliminary processing apparatus according to claim 5 is a position where the cutting means and the grinding means are on the cutter base and moved away from the vulcanization sleeve (standby position), and a position where the vulcanization sleeve is advanced forward (closed position). It is installed so that it can reciprocate only in the X-axis direction. In other words, when cutting, the cutting means becomes the processing position, and the cutting means and the grinding means retreat to the standby position separated from the vulcanization sleeve, so that the cutting means close to the vulcanization sleeve and in the processing position is cut by the operation of the cutter base. Can be processed. On the contrary, at the time of cutting, the cutting means moves forward to the machining position, the grinding means moves backward to the standby position, and the cutting means also takes the backward position to perform cutting. At the time of grinding, the grinding means can be advanced to the processing position and can be ground similarly.
[0013]
In the vulcanization sleeve preliminary processing apparatus according to claim 6 of the present application, the cutting means is fixed on the cutter base. In other words, since the cutter base is provided with means for moving in the X and Y axes, the reciprocating movement in the X axis direction between the standby position and the machining position for the cutting means can also be used as the cutter base moving means. Simplify.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a V-ribbed belt manufacturing method and a vulcanizing sleeve preliminary processing apparatus according to the present invention will be described below. First, FIG. 1 of the accompanying drawings relating to the manufacturing method is a cross-sectional configuration diagram of a V-ribbed belt vulcanization sleeve used in the present invention, FIG. 2 is a configuration diagram of a vulcanization sleeve rough skin removal method, and FIG. 3 is a preliminary processing step. FIG. 4 is a schematic view of vulcanization of the laminate, FIG. 7 is a front view showing a state where the vulcanization sleeve is ground with a grinding wheel, FIG. 8 is a sectional view of the grinding wheel, and FIG. 9 is a perspective view of a V-ribbed belt, and a forming process for finishing a vulcanized sleeve, a preliminary processing process for dividing the vulcanized sleeve into a small-width vulcanized sleeve having a predetermined width, which is the main part of the present invention, and a divided small-width vulcanized sleeve having a predetermined width. The V-groove processing step for grinding the V-shaped groove into a V-shaped groove will be described in detail below.
[0015]
First, the molding process for finishing the vulcanized sleeve is a process for forming the vulcanized sleeve 8 by vulcanizing a laminate in which belt constituent materials are sequentially laminated on the molding drum 1 as described below. As shown in FIG. 1, one or more cover canvases 2 are wound around the circumferential surface of a cylindrical molding drum 1 to form a stretched rubber layer 3, then an adhesive rubber layer 4, and then the same layer 4 is spirally wound. A cord 5 made of rope and a compressed rubber layer 6 are sequentially laminated. This laminated body 7 is vulcanized as follows to form a vulcanized sleeve 8. The compressed rubber layer 6 is mixed with 1 to 15 vol% of cut fibers having a length of 1 to 10 mm made of aramid fibers, polyester fibers, nylon fibers, cotton, and the like, and arranged in the width direction of the vulcanization sleeve.
[0016]
The vulcanization sleeve 8 is formed by the following vulcanization process. As shown in FIG. 4, a cylindrical rubber jacket 45 for vulcanization (hereinafter simply referred to as a jacket) is extrapolated to the cylindrical outer surface of the laminate 7 and then erected on a flat bottom plate in the vulcanizing can. Seal and seal the upper surface with an upper lid to fill the can with steam. Temperature and pressure are applied to the laminate 7 from the outer jacket 45, and at the same time, temperature is applied from the inside of the inner molding drum 1. At the same time, the outer surface of the laminated body 7 is compression-vulcanized and uniformly formed on the inner surface of the jacket 7 with the outer surface of the molding drum 1 being the fixed surface. It is taken out from the can, the jacket 45 is pulled out, and it is released from the molding drum 1 to form a cylindrical vulcanization sleeve 8.
[0017]
By the way, the surface layer of the vulcanized cylindrical vulcanization sleeve 8 is close to a perfect circle, but due to the thickness variation of the laminated body 7 and the jacket 45, unevenness is unavoidable and is slightly thicker than the final product thickness. It is molded to 05-1.0 mm. The surface layer in contact with the jacket 45 is a rubber material with few cut fibers.
[0018]
Next, the preliminary processing step of dividing the vulcanized sleeve into a narrow width vulcanization sleeve having a predetermined width, which is the main part of the present invention, is a pre-process prior to the step of processing the V-groove with a small width as a rib belt in the next step. That is, it is a preliminary process. The contents of the preliminary processing consist of processing for removing the rough skin layer 9 of the vulcanizing sleeve 8 and flattening it, and cutting and dividing it into small widths. First, a method for removing the rough skin that is the surface layer of the vulcanizing sleeve 8 will be described. This removal method is composed of the following three steps of cutting, grinding, and cutting.
[0019]
As shown in FIGS. 2 (a), (b), (c) and FIG. 3, the vulcanization sleeve 8 is stretched around the driving roll 10 and the driven roll 11 so that the compression rubber layer 6 is located on the surface side, and has a predetermined tension. The vulcanization sleeve 8 is stopped from rotating with a fixed flange at one end of the driven roll 11 and rotated. In the first cutting step 15, a rough ring layer 9 (FIG. 3) which is the surface of the vulcanizing sleeve 8 is formed by pushing a cylindrical ring cutter 23 against the surface of the vulcanizing sleeve 8 in the X direction and moving it in the Y direction. Are removed by cutting in one pass. In the second rough polishing step 17, the grinding wheel 12 of the rotating rough grinding wheel strokes the trace surface of the cutting step and moves laterally in the vulcanization sleeve width direction, that is, the Y direction, so that the cutting surface over the entire width of the vulcanization sleeve 8 is flattened. Turn into.
As a result, the rough skin layer 9 which is the outer surface of the vulcanizing sleeve 8 is removed by light cutting load and the lateral feed pattern is coarsely ground quickly, and the final grinding finish is 0.05 to 0.3 mm. Finish. Therefore, the rough skin layer 9 can be removed quickly and in a short time without applying excessive processing heat for grinding to the vulcanizing sleeve 8.
[0020]
Next, in the third divided cutting step 16 shown in FIG. 2 (c), the round blade 21 is pushed into the vulcanizing sleeve 8 that is running and rotated, and the vulcanized sleeve 8 is divided into one or more times according to the required size. Cut to obtain a small vulcanized sleeve having a width of 10 to 400 mm. This divided cutting process is an existing process, and the above-described new first cutting process and second grinding process are incorporated into this divided cutting process and integrated into a preliminary machining process.
[0021]
Finally, the V-groove processing step is a step of finishing the V-groove by grinding the V-shaped groove on the vulcanized sleeve 8 that has been flattened by removing the rough skin layer 9 in the preliminary processing step described above and cut into a small width. For example, as described in Japanese Patent Publication No. 07-037084, a vulcanized sleeve 8 cut to a small width is hung on a driving roll 46 and a driven roll 47 as shown in FIG. 7 and rotated under a predetermined tension. At the same time, the grinding wheel 48 shown in FIG. 8 is rotated at 1500 to 2000 rpm in the direction opposite to that of the vulcanizing sleeve 8 to be brought into contact with the vulcanizing sleeve 8 and 50 to 150 groove portions are formed on the surface thereof. This is a step of grinding 49 into V-shaped grooves at a time.
[0022]
Next, FIG. 5 is a schematic view of a vulcanizing sleeve rough skin removing device, FIG. 6 is a side view of a pre-grinding and pre-cutting device, and FIG. 7 is a vulcanizing sleeve using a grinding wheel. FIG. 8 is a cross-sectional view of a grinding wheel, and FIG. 9 is a perspective view of a V-ribbed belt.
[0023]
As shown in FIG. 5 (b), this apparatus has a biaxial stretching unit 20 that rotates the vulcanization sleeve 8 between two axes and rotates to prevent meandering, and FIG. As shown in FIG. 5 (b), a cutting means 15 having a ring cutter 23 that presses the blade edge against the rough skin layer that is the outer surface of the vulcanizing sleeve 8 and laterally feeds the blade to cut the rough skin layer. The grinding means 17 which finishes a flat surface using the grindstone 12 having a coarse grain size, and the vulcanization sleeve 8 is divided into individual narrow vulcanization sleeves using the round blade 21 as shown in FIG. A cutter unit 18 having three processing tools comprising means 16 and a servo table unit 19 capable of quickly and accurately performing operations in the X and Y directions when the cutter unit 18 is cut and positioned. .
[0024]
First, in the first biaxial stretching unit 20, the drive roll 10 is rotatively driven by a motor 22 at 50 to 250 RPM by lining urethane and rubber around the circumference so as to be exchangeable. The driven roll 11 has a fixed flange 13 at one end for preventing the meandering of the sleeve from meandering and freely rotates. One end of each of the two shafts is a fixed bearing, and the other end of the two shafts is a swinging open centering bearing that allows a space in which the vulcanizing sleeve 8 can be taken in and out, and the open shaft end is steady. The driven roll 11 is parallel to the drive roll 10, and the distance between the two axes is slidable by the hydraulic cylinder 40 and the ball slide bearing 24 according to the length of the sleeve, and a constant tension can be set.
[0025]
Next, the second cutter unit 18 uses the cutter base 26 as a common base as shown in FIGS. 5 (a), 5 (b), and 5 (c), and the following three cutting means 15 and grinding means are provided on this base. 17, a cutting means 16 is provided, and a processing selection mechanism of each means for processing, that is, a mechanism capable of reciprocating only in the X-axis direction between the standby position b and the processing position a is configured. Also, the servo table unit 19 to be described later has a relationship of driving the cutter base 26 in the X and Y directions with multiple functions.
[0026]
First, the first cutting means 15 is such that a cylindrical ring cutter 23 used for cutting the rough skin layer 9 is easily fixed by a holder 27 so that the cutting edge at the tip of the cylinder hits downward from the horizontal axis of the main shaft. A ball slide bearing 24 and a hydraulic cylinder 25 are provided on the base 26 so as to extend and contract.
[0027]
Next, the second grinding means 17 is used to flatten the surface of the rough skin layer 9 after the above-described cutting process, and rotate the coarse grinding wheel 12 of # 30 to # 100 with a coarse particle size at 1500 to 2000 rpm by the electric motor 30. The grinding wheel 12 is installed on the cutter base 26 so as to be extendable and retractable by a ball slide bearing 29 and a hydraulic cylinder 31 by being driven by a belt so as to be able to rotate forward and backward.
[0028]
The remaining third cutting means 16 uses the vulcanization sleeve 8 for one or more divided cuts depending on the required size. The center of the round blade 21 is aligned with the horizontal axis of the drive roll 10, the blade wear part is rotated in a regular cycle, the blade contact position is changed, and the blade 22 can be exchanged by one rotation of the round blade. To be held in.
[0029]
The last third servo table unit 19 has a cutter base 26, which is a common base for the above-mentioned processing tools, and is provided with servo motors 33 and 37 which can be set in a variety of conditions with high accuracy in feeding to the following X and Y axes. Use each one to drive accurately and quickly. Set the values of speed, distance, and position in advance according to each condition such as thickness machining feed in the X-axis direction, full-width machining feed in the Y-axis direction, positioning of divided cuts, etc. The rotation of the servo motor 33 is changed to a linear motion with a ball screw, and the ball slide bearing 34 slides back and forth precisely. Similarly, the movement in the Y-axis direction is made to slide left and right with the servo motor 37, the ball screw and the ball slide bearing 36. It can correspond freely in the X-axis and Y-axis directions.
[0030]
As described above, since each processing means shares the cutter base 26 and shares the precision feed drive of the servo table unit 19 described above, the cutting means, grinding means, and cutting means on this base are used for processing purposes. Accordingly, at the time of machining, each machining tip protrudes at least a machining depth of 10 mm or more in the X-axis direction as compared with the tip of the non-machining means, approaches the vulcanization sleeve 8 side, and the outer surface of the vulcanization sleeve 8 When the machining position a close to is taken and the front end portion at the time of non-machining is set to a standby position b which is retracted by more than this distance, each means can individually perform the machining operation. Here, the cutting means is fixed at the standby position b together with the cutter base 26 which is a common base, and in this state, other cutting means and grinding means are installed so as to be able to reciprocate, and the protruding position is set as the machining position a. .
[0031]
As described above, the cutter base 26 is precisely fed in the X-axis and Y-axis directions by the servo table unit 19 and has a function of moving to the above-described machining position and standby position. One of the means, the grinding means, and the cutting means can share this function. Here, the cutting means for changing the processing tool in the horizontal direction is fixed to the cutter base 26.
[0032]
The biaxial stretching unit 20, the cutter unit 18, and the servo table unit 19, which are the above three units, are compactly integrated on a common mount 39 as shown in FIG. To do.
[0033]
Next, the operation of the preliminary polishing and preliminary cutting apparatus for the V-ribbed belt of the present invention will be described. First, when the vulcanizing sleeve 8 is mounted between the driving roll 10 and the driven roll 11 and scanned with the instruction card, the following operating conditions are automatically set to complete a series of operations, and the driving roll 10 and the driven roll 11 stop rotating. Thus, the rough skin is removed and the sleeve divided into 1 to a plurality of pieces is held in a state where it can be taken out.
[0034]
Then when executing the autostart, freed bearing end of the drive roll 10 and the driven roller 11 by expanding the hydraulic cylinder 41, 42 shown in FIG. 6, the bearing 10a bearing end is closed by swing, 11a . The hydraulic cylinder 40 (see FIG. 5) is operated, the driven roll 11 is slid and guided to the ball slide bearing 24, and the sleeve is extended with a constant tension. Next, the drive roll 10 rotates. Next, the ring cutter 23 is pushed out by the hydraulic cylinder 25 to the start position a in the X-axis direction, and further cut at a slow speed in the X-axis direction by the servo table 26 and moved laterally in the Y-axis direction. Then, the ring cutter 23 returns to the standby position b when the hydraulic cylinder 25 is retracted.
[0035]
Next, rough polishing is started, and the polishing wheel 12 is rotated by the electric motor 30 and advanced by the hydraulic cylinder 31 to the start position a in the X-axis direction, and is finely moved by the servo table 26 in the X-axis direction and in the Y-axis direction. Moves sideways and roughs the cut surface. The grinding wheel 12 returns to the standby position b by the retraction of the hydraulic cylinder 31 and stops rotating.
[0036]
Finally, the ring cutter 23 and the grinding wheel 12 are both at the standby position b and the cutting edge is retracted from the tip of the round blade 21, and the round blade 21 is accurately moved to a predetermined division position by the servo table 26 at high speed. The round blade 21 is pressed against the vulcanizing sleeve 8 which is moving in the X-axis and Y-axis directions and is rotating, by the cutting feed in the X-axis direction of the servo table, and abuts against the urethane-lined drive roll 10. As a result, the cut is divided and a series of automatic operations are completed.
[0037]
Note that the V-ribbed belt manufacturing method and preliminary processing apparatus of the present invention are not limited to those shown in FIGS. 1 to 9 and can take the following forms, for example.
(1) The method for removing the rough skin, which is the surface layer of the vulcanized sleeve 8, is composed of three steps: a cutting step, a grinding step, and a cutting step, but either one of the cutting step or the grinding step is simplified. Can be
(2) As a cutting means for cutting the rough skin layer, a surface cutting blade used in a lathe, a mill or the like can be used instead of the cylindrical ring cutter 23.
(3) where is fixed to the cutter base 26 is a common base of the cutting means, other cutting means, but have established grinding means reciprocatably, reviewing the replacement direction of pressurized Engineering tools in each means collocated Any means can be adopted.
[0038]
【The invention's effect】
As described above, in the invention relating to the manufacturing method of the V-ribbed belt and the preliminary processing apparatus according to claims 1 to 6 of the present application, the removal of the rough skin portion of the surface layer in the grinding process of the vulcanization sleeve is limited to the cutting means and the flattening. The sleeve heat generation is suppressed by polishing to suppress the heat generation of the sleeve, and continuous sleeve heat accumulation can be avoided between the V-groove grinding process of grinding the V-shaped groove as the subsequent process. As a result, variations in rib crest angle and pitch due to thermal contraction of the sleeve are reduced, improving belt product quality, and improving productivity by shortening the rough skin removal time by cutting and the total time by dividing cuts, etc. become.
[Brief description of the drawings]
FIG. 1 is a cross-sectional configuration diagram of a vulcanization sleeve of a V-ribbed belt used in the present invention.
FIGS. 2A and 2B are configuration diagrams of a method for removing a rough skin of a vulcanization sleeve, where FIG. 2A shows a cutting process of the vulcanization sleeve, FIG. 2B shows a grinding process of the vulcanization sleeve, and FIG.
FIG. 3 is a state diagram of a vulcanized sleeve processing surface in a preliminary processing step.
FIG. 4 is a schematic view of vulcanization of a laminate.
FIG. 5 is a conceptual diagram of a rough cut removing device for a small-cut vulcanization sleeve, where (a) is a cutting means of a vulcanization sleeve pre-processing device, and (b) is a biaxial stretching unit of the vulcanization sleeve pre-processing device. And (c) grinding means, and cutting means of the vulcanizing sleeve preliminary processing apparatus.
FIG. 6 is a side view of a preliminary grinding and preliminary cutting apparatus.
FIG. 7 is a front view showing a state in which a vulcanization sleeve is ground with a grinding wheel.
FIG. 8 is a cross-sectional view of a grinding wheel.
FIG. 9 is a perspective view of a V-ribbed belt.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Molding drum 6 Compressed rubber layer 7 Laminated body 8 Vulcanization sleeve 9 Rough skin layer a Processing position b Standby position 12 Polishing wheel 15 Cutting image 16 Divided cut image 17 Rough polishing image 18 Cutter unit 19 Servo table unit 20 Biaxial stretch unit 21 Round Blade 23 Ring Cutter 26 Cutter Base 45 Vulcanizing Jacket 48 Grinding Wheel 49 Groove

Claims (6)

It has a stretch rubber layer with a cover canvas laminated on its surface, an adhesive rubber layer in which a core wire is embedded along the longitudinal direction of the belt, and a plurality of rib portions extending in the circumferential direction of the belt on a compression rubber layer adjacent to the adhesive rubber layer In the manufacturing method of the V-ribbed belt
A molding step in which a cord is wound around at least an adhesive rubber layer and a compressed rubber layer is laminated thereon, and a molding step is performed in which the obtained rubber molding is vulcanized and finished into a vulcanized sleeve;
After cutting the rough skin layer of the vulcanized sleeve with a blade, the surface is ground flat using a coarse grindstone, and further divided into small width vulcanized sleeves of a predetermined width,
A V-ribbed belt manufacturing method comprising: a V-groove processing step of grinding a narrow vulcanization sleeve into one or a plurality of V-shaped grooves. The method for producing a V-ribbed belt according to claim 1, wherein the thickness of the rough skin layer after preliminary processing of the vulcanized sleeve is 0.05 to 0.3 mm thicker than the thickness after the V-groove processing step. Preliminary machining by integrating the process of cutting the rough skin layer with a blade and the process of grinding the surface flatly using a grindstone with a coarse particle size into a vulcanization sleeve of a predetermined width to obtain a narrow vulcanization sleeve The method for producing a V-ribbed belt according to claim 1, which is a process. In a vulcanization sleeve pre-processing apparatus for pre-processing into a narrow vulcanization sleeve having a flat surface by removing a rough skin layer of the vulcanization sleeve in advance before grinding the V-shaped groove on the surface of the vulcanized vulcanization sleeve,
A biaxial stretch unit that stretches the vulcanization sleeve between two shafts and rotates,
A cutting means for cutting the rough skin layer by pressing the blade edge against the rough skin layer that becomes the outer surface of the vulcanization sleeve, a grinding means for finishing the surface of the vulcanization sleeve to a flat surface using a coarse grain, A cutter unit comprising a cutting means for dividing the sulfur sleeve into individual narrow vulcanization sleeves, a cutter base of the cutter unit, a grinding means, and a cutter base that shares the cutting means, A servo table unit comprising a direction (X-axis direction) approaching and separating from the vulcanization sleeve stretched on the shaft-stretch unit and a moving means for moving along the width direction (Y-axis direction) of the vulcanization sleeve. A pre-processing device for a vulcanization sleeve, comprising: The vulcanizing sleeve preliminary processing apparatus according to claim 4, wherein the cutting means and the grinding means are provided on the cutter base so as to be reciprocally movable only in the X-axis direction between the standby position and the processing start position. The pre-processing device for a vulcanization sleeve according to claim 5, wherein the cutting means is fixed on the cutter base.

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