JP2011167928A - Method and apparatus for producing rubber product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce production cost while inhibiting the yielding of a wasteful material, and to prevent upsizing of facilities. <P>SOLUTION: First, the working surface 43 of a working tool 38 with a large number of projections 47 is made to slide into contact with the joining surface (side end surface) of a strip-shaped member 12. Thus, the joining surface is roughened as a result of moving the strip-shaped member 12 to the working tool 38. Consequently, even in the case that the tack of the joining surface has deteriorated due to long-term storage etc., a fresh unvulcanized rubber becomes exposed on the joining surface by the roughening operation, and at the same time, the joining surface is reconditioned to an ideal flat shape suitable for joining. After that, the joining surfaces of the rubber members are mutually put together. Thereby the joint strength can be easily increased. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

    The present invention relates to a manufacturing method and apparatus for manufacturing rubber products such as carcass plies and belt plies.

    As a conventional rubber product manufacturing method and apparatus, for example, those described in Patent Document 1 below are known.

JP 2003-291225 A

  In this method, a calendered raw fabric is formed by coating a plurality of cords with unvulcanized rubber using a calender device, and then wound once while the calendered raw fabric is superposed on a stock cloth liner cloth. Take a roll and mold it. Then, after storing the scroll in this state for a certain period of time, while unwinding the original fabric from the calendared scroll as necessary, the calendered original fabric is cut in the width direction to form the cut pieces one after another, Next, the side end surfaces extending in the cord length direction of these cut pieces are joined together to form a carcass ply sheet original fabric.

  Here, the roll of the calendered roll is stored for a certain period of time as described above. However, if this storage period becomes longer, the adhesive strength of the coated unvulcanized rubber surface decreases, and as a result, cutting is performed. There exists a subject that the joint strength of pieces will fall. In order to solve such a problem, conventionally, both end portions of the calendered original fabric are cut along the cords with a cutter between the cords immediately before being cut into pieces, and a small number of cords are embedded. By cutting off the narrow scrap material, the fresh unvulcanized rubber is exposed on both end surfaces of the calendered raw material, and then the side end surfaces of the cut pieces where the fresh unvulcanized rubber is exposed are joined together. It was.

    However, in such a conventional rubber product manufacturing method and apparatus, the above-mentioned narrow scrap member is generated, so that the material is wasted and the scrap member disposal cost is required. There was a problem that the production cost of the product would be high. Moreover, the installation for discharging | emitting the generated waste member is needed, As a result, there also existed the subject that the whole apparatus enlarged.

  An object of the present invention is to provide a rubber product manufacturing method and apparatus that can prevent generation of useless materials, can easily reduce production costs, and can prevent an increase in size of equipment. And

    The first object is to make the processing tool and the rubber member relative to each other while bringing the processing surface of the processing tool provided with a number of protrusions into sliding contact with the joint surface of the rubber member containing unvulcanized rubber. A step of roughening the bonding surface of the rubber member, and a step of pressing and bonding the bonding surface of the rubber member having a roughened bonding surface and the bonding surface of the rubber member. This can be achieved by a method of manufacturing a rubber product.

  Second, a processing tool provided with a large number of protrusions on the processing surface, the processing surface being able to slidably contact with the joint surface of the rubber member containing unvulcanized rubber, and the processing surface of the processing tool on the joint surface of the rubber member A moving means for roughening the bonding surface of the rubber member by relatively moving the processing tool and the rubber member when in sliding contact, and a bonding surface of the rubber member whose bonding surface is roughened This can be achieved by a rubber product manufacturing apparatus provided with a joining means that joins the joining surface of the rubber member by pressure contact.

  In this invention, when the processing surface of the processing tool provided with a large number of protrusions on the joint surface of the rubber member is in sliding contact, the processing tool and the rubber member are relatively moved to roughen the joint surface. Therefore, even if the adhesive strength of the joint surface is reduced by long-term storage or the like, the roughened surface exposes fresh unvulcanized rubber to the joint surface and adjusts the shape of the joint surface. After that, since the roughened joint surface of the rubber member and the joint surface of the rubber member are joined by pressure contact, the joint strength of these joint surfaces can be easily improved. At this time, it is only necessary to roughen the joint surface, and it is not necessary to cut the vicinity of the joint surface, so that narrow scrap members are not generated. As a result, generation of useless material is prevented and production is prevented. The cost can be easily reduced, and the equipment can be prevented from being enlarged.

  Moreover, if comprised as described in Claim 2, the adhesive force of the fresh unvulcanized rubber exposed to the joint surface can be kept at a high value. Moreover, if comprised as described in Claim 3, even if the joint surface is pre-crosslinked, the inside fresh unvulcanized rubber can be exposed by the said roughening. Furthermore, if constituted as in claim 5, the joining surface can be roughened with high efficiency, and if constituted as in claim 6, the structure of the processing tool is simple. Therefore, it can be manufactured at low cost.

It is a schematic front view which shows Embodiment 1 of this invention. FIG. It is a perspective view explaining the state which has roughened the joint surface with the processing tool. It is sectional drawing which shows a part of processing tool.

Embodiment 1 of the present invention will be described below with reference to the drawings.
In FIGS. 1 and 2, 11 is a winding roll formed by winding a belt-like member 12 as a rubber member and a liner 13 in a state of overlapping with each other, and the winding roll 11 has a certain degree of winding. After being stored in this state for a period of time, when it is rotated as necessary, the strip member 12 and the liner 13 are unwound from the winding roll 11 while being separated. Here, the belt-like member 12 is configured by, for example, covering the periphery of a plurality of reinforced cords 14 with unvulcanized rubber 15 using a calendar device or the like (not shown), and a part thereof Contains unvulcanized rubber, and in particular, the surface portion is composed of unvulcanized rubber. In addition, as the liner 13, for example, a long belt-like polyethylene sheet, a cloth fabric or the like is used.

  Then, the liner 13 unwound from the winding roll 11 as described above is wound around the winding reel 16 driven and rotated by a motor (not shown) one after another in a roll shape. On the other hand, the belt-like member 12 unwound from the winding roll 11 is taken up by a moving means 19 comprising a motor 17 and a pair of supply rollers 18 driven and rotated by the motor 17. At this time, the belt-like member 12 is wound. It travels toward the moving means 19 while being guided by a plurality of guide rollers 20, 21, and 22 disposed between the roll 11 and the moving means 19, and after passing through the moving means 19, a horizontal plate-like shape Is supplied onto the guide plate 23. Reference numeral 24 denotes a first conveyor which is disposed in the vicinity of the guide plate 23 and extends in the front-rear direction, and runs intermittently by a motor (not shown), and the guide plate 23 is disposed at the rear end of the first conveyor 24. The belt-like member 12 is supplied from the width direction of the first conveyor 24.

  26 is cutting means installed at the rear end (upstream end) of the first conveyor 24 and having a cutter 27. When the cutter 27 of the cutting means 26 moves in the front-rear direction, the rear end of the first conveyor 24 The starting end of the belt-like member 12 supplied above is cut by the cutter 27 in the width direction of the belt-like member 12, and a rectangular sheet piece 28 is cut out from the belt-like member 12. The sheet piece 28 thus cut out from the belt-like member 12 is conveyed forward by the travel of the first conveyor 24. At this time, the reinforcing cord 14 of the sheet piece 28 is in the width direction of the first conveyor 24. It extends to.

  31 is a second conveyor that is installed immediately before the first conveyor 24 and extends along an extension line of the first conveyor 24. The second conveyor 31 is driven by a motor (not shown) to intermittently move back and forth. Drive to. 32 is a joining means installed between the first conveyor 24 and the second conveyor 31, and this joining means 32 is located on the first conveyor 24 and the front end face of the sheet piece 28 (rubber member) as the succeeding sheet. 28a (joint surface) and the joining position between the first and second conveyors 24, 31 on the rear end face 28b (joint surface) of the sheet piece 28 (rubber member) positioned and preceded on the second conveyor 31 Butt-join.

  Here, the following sheet piece 28 (rubber member) and the preceding sheet piece 28 (rubber member) are butt-joined to each other by moving the second conveyor 31 to move the preceding sheet piece 28 in the longitudinal direction of the reinforcing cord 14. The rear side end surface 28b extending to the rear is conveyed rearward until it reaches between the first and second conveyors 24, 31, while the first sheet 24 is moved to extend the subsequent sheet piece 28 in the longitudinal direction of the reinforcing cord 14. The front side end face 28a is conveyed forward until it reaches the space between the first and second conveyors 24, 31, and a slight gap having a constant width is provided between these front and rear end faces 28a, 28b. Are formed, the joining means 32 draws the following, the front of the preceding sheet piece 28, and the rear side end faces 28a and 28b together, and press-contacts them.

  The carcass as a rubber product in which the reinforcing cord 14 is embedded is obtained by joining the front end face 28a of the succeeding sheet piece 28 one after another to the rear end face 28b of the preceding sheet piece 28 in this way. The ply sheet member 33 is formed. Here, since the following and preceding sheet pieces 28 are both cut out from the band-shaped member 12, they similarly correspond to the rubber members in the present invention. In addition, in this invention, after supplying the said strip | belt-shaped member 12 diagonally with respect to the 1st conveyor 24 and cutting out a parallelogram sheet piece, the joining surfaces (front and back side end surfaces) of these sheet pieces are connected to each other. By joining one after another, a sheet-like member for a belt ply as a rubber product may be formed. In this case, the reinforcing cord in the sheet-like member is inclined at a predetermined angle with respect to the longitudinal direction.

  Here, as described above, the winding roll 11 is stored in a roll shape for a certain period of time, and then the belt-like member 12 is unwound from the winding roll 11, but if this storage period becomes longer, the circumference of the reinforcing cord 14 is increased. The adhesive force on the surface of the unvulcanized rubber 15 that is coated may decrease, and as a result, the bonding strength between the sheet pieces 28 may decrease. For this reason, in the prior art, immediately before cutting out the sheet piece 28 from the belt-like member 12, in detail, the both ends of the belt-like member 12 are cut by a cutter between the guide roller 20 and the guide roller 21, and a small number of reinforcements are made. The fresh unvulcanized rubber 15 is exposed on both side end surfaces (front and rear end surfaces 28a, b) of the belt-like member 12 (sheet piece 28) by cutting off the narrow scrap member in which the cord 14 is embedded. I was doing.

  However, in this case, a narrow scrap member is generated, so that the material is wasted and the disposal cost of the scrap member is required. As a result, the production cost of the sheet-like member 33 is increased, and the generation is further generated. It is necessary to install equipment for discharging and taking up the scrap members, for example, a take-up reel and a motor for rotating the take-up reel, and the entire apparatus has been enlarged.

  For this reason, in this embodiment, as shown in FIGS. 1, 3, and 4, both end surfaces of the belt-like member 12 (front and rear in the sheet piece 28) are located at the positions where the cutters are disposed between the guide rollers 20 and 21. A pair of roughening mechanisms 36 for roughening the side end faces 28a, b) are provided. Each roughening mechanism 36 has a support plate 37 that is disposed close to the side end surface of the belt-like member 12 and extends along the belt-like member 12, and an axis line extends in the thickness direction of the belt-like member 12. A cylindrical processing tool 38 is rotatably supported, and an output shaft (not shown) of a drive motor 40 attached to the support plate 37 is connected to the processing tool 38. When the drive motor 40 is operated, the processing tool 38 rotates at high speed around its own axis, and the peripheral speed of the processing tool 38 at this time is considerably higher than the traveling (moving) speed of the belt-like member 12. Thus, the processing tool 38 is composed of a rotating body that rotates around the axis.

  Each of the above-described processing tools 38 has a processing surface 43 on the outer peripheral surface, and the processing surface 43 is inclined in one direction with respect to the axial direction and has a plurality of parallel fine grooves 44 extending in a spiral shape and an axial direction. Are formed in a plurality of parallel narrow grooves 45 that are inclined in the other direction (opposite to the one direction) and extend in a spiral shape, both of which have a V-shaped cross section. Crossing each other at many places. In this way, when a large number of narrow grooves 44 and 45 intersecting each other are formed on the processing surface 43 of each processing tool 38, the processing surface 43 is tapered toward the outer side in the radial direction between the narrow grooves 44 and 45. A large number of projections 47 having a quadrangular pyramid shape or a truncated quadrangular pyramid shape are defined.

  When the processing tool 38 rotates at a high speed as described above, when the processing surface 43 of the processing tool 38 is pressed against both end surfaces of the strip-shaped member 12, the processing surface 43 of the processing tool 38 is the strip-shaped member 12. At this time, since a large number of protrusions 47 are defined on the processing surface 43 of each processing tool 38, both end surfaces of the portion in contact with the processing surface 43 are protrusions of the processing surface 43. It touches 47 many times and rises up and is roughened. Reference numerals 50 and 51 are guide rollers installed on the upstream side and the downstream side of the processing tool 38, respectively, and rotatably supported by the support plate 37. These guide rollers 50 and 51 are provided on the belt-like member 12. The belt-like member 12 is guided such that the processed surface 43 is brought into rolling contact with both side end faces and the sliding face 43 is surely brought into sliding contact with both side end faces of the belt-like member 12. In the present invention, the block-shaped processing tool having a large number of protrusions formed on the processing surface is reciprocated in the longitudinal direction or the thickness direction of the rubber member, so that the processing surface is slid on the bonding surface of the rubber member. You may make it contact.

  At this time, if the belt-like member 12 is moving (running) with respect to the processing tool 38 while being given appropriate tension by the moving means 19, both end surfaces of the belt-like member 12 are roughened one after another by the processing tool 38, Fresh unvulcanized rubber 15 is successively exposed on both side end surfaces (front and rear end surfaces 28a and 28b of the sheet piece 28) of the belt-like member 12. Thereafter, after cutting the sheet pieces 28 one after another by the cutting means 26 from the belt-like member 12 whose entire joining surface (both end surfaces) is roughened as described above, the rough surface of the rubber member (the subsequent sheet piece 28). The joined surface (front end surface 28a) and the roughened joining surface (rear end surface 28b) of the rubber member (previous sheet piece 28) are pressure-contacted by the joining means 32, and both the sheet pieces 28 are joined. Are joined together.

  As described above, when the processing surface 43 of the processing tool 38 provided with a large number of protrusions 47 is in sliding contact with the joining surface (side end surface) of the strip-shaped member 12, the strip-shaped member 12 is moved with respect to the processing tool 38. Since the bonding surface has been roughened, even if the adhesive strength of the bonding surface has decreased due to long-term storage or the like, fresh unvulcanized rubber 15 is exposed to the bonding surface due to the roughening, and Even if the surface has irregularities, the bonding surface is adjusted to a flat shape suitable for bonding. Thereafter, the joining surface of the sheet piece 28 as a rubber member cut out from the belt-like member 12, in this case, the front end face 28a of the succeeding sheet piece 28 and the rear end face 28b of the preceding sheet piece 28 are pressure-contacted to both sheets. Since the bonding surfaces of the pieces 28 are bonded to each other, the bonding strength between the bonding surfaces can be easily improved.

  In addition, it is only necessary to roughen the joining surface of the sheet piece 28, and it is not necessary to cut the vicinity of the joining surface as in the prior art, so that no narrow scrap member is generated, and as a result, useless material It is possible to easily prevent the occurrence of this and to reduce the production cost, and it is not necessary to provide facilities for discharging and winding up the generated scrap members, and it is possible to prevent the facilities from becoming large. At this time, as described above, the joining surface (front end surface 28a) of the rubber member (following sheet piece 28) and the joining surface (rear end surface 28b) of the rubber member (previous sheet piece 28) are both roughened. This is preferable because the bonding strength between the bonding surfaces is improved. When fresh unvulcanized rubber is exposed on the joint surface of one of the rubber members, roughening of the joint surface of the rubber member on which the unvulcanized rubber is exposed is omitted. You can also

  Here, in this embodiment, as described above, a large number of parallel narrow grooves 44, 45 are formed on the processing surface 43 of the processing tool 38, so that a large number of protrusions 47 are defined between the narrow grooves 44, 45. As a result, the structure of the processing tool 38 becomes simple and can be manufactured at low cost. In the present invention, a large number of narrow grooves intersecting each other with a rectangular or U-shaped cross section are formed on the processing surface 43 of the processing tool 38 so that a large number of protrusions are defined between the narrow grooves. In this case, the protrusion has a quadrangular prism shape. Further, the narrow groove may be only inclined in one direction or the other direction, and the protrusion in this case is a protrusion extending in a spiral shape.

  Furthermore, in this invention, you may comprise a processing tool from a grinding stone, In this case, the abrasive grain which protruded from the binder surface of this grinding stone becomes a protrusion of this invention. When the processing tool is constituted of a grinding wheel in this way, when the joint surface is roughened, the joint surface is scraped off, so a slight amount of chips are generated, but such chips adhere to the joint surface. Then, there is a possibility that the bonding strength may be reduced, and if the cutting powder is in a semi-vulcanized state by pre-crosslinking or the like, there is a possibility that it may become a foreign substance, resulting in a decrease in quality, and may further deteriorate the working environment. . On the other hand, if the projections are defined by the narrow grooves as in this embodiment, only the cuts are formed on the joint surface when the joint surface is roughened, so that chips are generated. As a result, the above-described problems can be reliably solved. In the above-described embodiment, the processing tool 38 is composed of a rotating body that rotates around the axis, and a number of protrusions 47 are provided on the processing surface 43 that is the outer peripheral surface of the processing tool 38. For example, when the processing tool is reciprocated, the joining surface can be easily roughened with high efficiency as compared with the case where the both side end surfaces of the belt-like member 12 are roughened by making the processing tool reciprocating.

  Further, in the above-described embodiment, immediately after both end surfaces (joint surfaces) of the strip member 12 are roughened by the processing tool 38, the joint surfaces (front and rear end surfaces) of the sheet piece 28 cut out from the strip member 12 are used. 28a and b) are bonded to each other. In this invention, the roughened bonding surface and the rubber member are bonded within 24 hours from the time when the bonding surface of the rubber member is roughened by a processing tool. It is preferable to press-contact the joint surface. The reason is that if the pressure welding is performed within the above-mentioned time, the adhesive strength of fresh unvulcanized rubber exposed on the bonding surface can be maintained at a high value, and the bonding strength can be easily improved. Because it can.

  Here, there are cases where at least a part of the joining surface of the band-shaped member 12 is irradiated with energy rays and pre-crosslinked, but in this case, even if it is not stored for a long time, it is pre-crosslinked. The fresh unvulcanized rubber 15 is not exposed on the joint surface of the existing part. Even in such a case, the bonding strength can be easily improved by roughening the entire bonding surface with the processing tool and exposing the fresh unvulcanized rubber inside the bonding surface. Here, examples of the energy beam include an electron beam, ultraviolet rays, X-rays, and gamma rays.

  In the present invention, the rubber member may be a belt-like tread rubber, an inner liner, an endless power transmission belt, or the like made entirely of unvulcanized rubber. In this case, the rubber member may be joined. After roughening the start and end surfaces which are surfaces, the rubber members (ring-shaped tread rubber and the like) may be molded by joining the start and end surfaces of these rubber members. Further, in the present invention, various rubber products may be manufactured by bonding the bonding surface of the rubber member whose bonding surface is roughened and the bonding surface of a rubber member of a different type from the rubber member. Good. Further, in the present invention, the rubber member is stopped while the processing tool is moved, or both the rubber member and the processing tool are moved so that the rubber member and the processing tool are moved relatively. It may be.

Next, the operation of the first embodiment will be described.
Now, it is assumed that the winding roll 11 is rotated and the belt-like member 12 and the liner 13 are unwound while being separated from the winding roll 11. At this time, the liner 13 unwound from the take-up roll 11 is taken up by the take-up reel 16 and wound around the take-up reel 16 in a roll shape one after another. On the other hand, the belt-like member 12 as a rubber member unwound from the winding roll 11 is taken up by the moving means 19, and moves and travels toward the moving means 19 while being guided one after another by the guide rollers 20, 21, and 22. At this time, the processing tool 38 of the roughening mechanism 36 installed between the guide rollers 20 and 21 rotates at a high speed, and the processing surfaces 43 are pressed against both end surfaces of the belt-like member 12, respectively. The machining surface 43 of the tool 38 is in sliding contact with both end surfaces of the belt-like member 12.

  At this time, since a large number of protrusions 47 are provided on the processing surface 43 of each processing tool 38, both side end surfaces of the part in contact with the processing surface 43 come into contact with the protrusions 47 of the processing surface 43 many times. Roughened. Further, at this time, since the belt-like member 12 is moved (running) with respect to the processing tool 38 by the moving means 19 as described above, the processing tool 38 has the both side end surfaces (joint surfaces) of the belt-like member 12 one after another in the longitudinal direction. And the fresh unvulcanized rubber 15 is exposed one after another on both end faces of the belt-like member 12. When the belt-like member 12 passes between the supply rollers 18 of the moving means 19, the belt-like member 12 is supplied to the guide plate 23 and the rear end of the first conveyor 24. At this time, the cutter of the cutting means 26 27, the starting end of the belt-like member 12 is cut in the width direction of the belt-like member 12, and a rectangular sheet piece 28 is cut out from the belt-like member 12.

  At this time, both the front end surface 28a and the rear end surface 28b of the sheet piece 28 become roughened joint surfaces extending in the longitudinal direction of the reinforcing cord 14. Next, the second conveyor 31 travels and is conveyed rearward until the rear end face 28b of the preceding sheet piece 28 reaches between the first and second conveyors 24 and 31, and the first conveyor 24 travels. Similarly, the front end face 28a of the succeeding sheet piece 28 is similarly conveyed forward until it reaches the space between the first and second conveyors 24, 31, and the following, the front end face 28a of the preceding sheet piece 28, the rear end face 28a, A slight gap having a constant width is formed between b.

  Thereafter, the following, front and front end surfaces 28a, b of the preceding sheet piece 28 are attracted by the joining means 32 and are pressed and joined to each other. Thus, the roughened front end face 28a (joint) of the succeeding sheet piece 28 (rubber member) is provided on the roughened rear end face 28b (joint face) of the preceding sheet piece 28 (rubber member). The sheet-like member 33 for carcass ply as a rubber product in which the reinforcing cord 14 extends in a direction orthogonal to the longitudinal direction is formed by joining the surface) one after another. At this time, even if the adhesive strength of the joining surface is reduced due to long-term storage or the like of the belt-like member 12, the joining surface (front and rear end surfaces 28a, b) of the sheet piece 28 is roughened by the processing tool 38 as described above. Since the fresh unvulcanized rubber 15 is exposed and is adjusted to a shape suitable for bonding, the bonding surfaces (front and rear end surfaces 28a, b) are easily bonded with high strength. Thereafter, the sheet-like member 33 is conveyed forward by the travel of the second conveyor 31.

    Next, test examples will be described. In this test, by cutting the both ends of the band-shaped member with a cutter to form a narrow scrap member, a conventional unvulcanized rubber was exposed on both side end surfaces (bonding surfaces) of the band-shaped member. A new unvulcanized rubber is applied to both end surfaces (joint surfaces) of the band member by roughening the end surfaces on both sides of the rubber member and the band member with a processed surface of a rotating body (processing tool) made of cemented carbide. The exposed rubber members 1 to 6 and both end surfaces (joint surfaces) of the belt-like member are roughened by the processed surface of the diamond grindstone so that new unvulcanized surfaces are formed on the both end surfaces (joint surfaces) of the belt-like member. An implementation rubber member 7 with the rubber exposed was prepared. Although no chips were generated during the molding of the implementation rubber members 1 to 6, slight chips were generated during the molding of the implementation rubber member 7.

  Here, the diameter (mm) of the rotating body used for forming the rubber members 1 to 6 and the peripheral speed (m / min) on the processed surface (outer peripheral surface) are as shown in Table 1 below. Note that the number of protrusions per rotation in a rotating body having a diameter of 6 and 16 mm was 21 and 39, respectively. Further, the diameter (mm) of the diamond grindstone used for forming the rubber member 7 and the peripheral speed (m / min) on the processed surface (outer peripheral surface) are as shown in Table 1 below. The grain size of the diamond grindstone was 140. Next, after joining the joining surfaces of the conventional rubber member and the implementation rubber members 1 to 7 described above, the joining ratio (%) at the joining portion of each rubber member was measured. The results are shown in Table 1 below. Show. Here, the bonding ratio of 100 means that the bonding is performed on the entire bonding surface, that is, with an area of 100%.

  Next, the adhesive strength (N), that is, the tack value of each rubber member was measured using a commercially available tack meter, and the results are shown in Table 1 above. Each bonded rubber member was pulled at a speed of 30 ± 2 mm / min, and an extremely severe strength test was performed on these rubber members at an elongation rate of 400%. At this time, it was detected whether or not the joint at the joint portion was disconnected, and the result is shown in Table 1 as the joint strength. Here, although the adhesive strength of the implementation rubber member 7 is higher than the adhesion strength of the implementation rubber members 1 and 4, the disconnection occurred in the strength test because of the chips generated during the molding of the implementation rubber member 7. This is considered to be because of adhering to the joint surface.

  The present invention can be applied to the industrial field of manufacturing rubber products such as carcass plies and belt plies.

12, 28 ... Rubber member 15 ... Unvulcanized rubber
28a, b ... Joint surface 38 ... Processing tool
43 ... machined surface 44, 45 ... narrow groove
47… Protrusions

Claims (6)

    By relatively moving the processing tool and the rubber member while sliding the processing surface of the processing tool provided with a large number of protrusions on the joint surface of the rubber member containing unvulcanized rubber, the rubber member A rubber product comprising: a step of roughening a bonding surface of the rubber member; and a step of pressing and bonding the bonding surface of the rubber member having a roughened bonding surface and the bonding surface of the rubber member. Method.     The method for producing a rubber product according to claim 1, wherein the joining surfaces are pressed together within 24 hours from the time when the joining surfaces of the rubber members are roughened by the processing tool.     The method for producing a rubber product according to claim 1 or 2, wherein at least a part of the joining surface of the rubber member is pre-crosslinked by irradiation with energy rays.     A plurality of protrusions are provided on the processing surface, the processing tool capable of sliding contact with the joint surface of the rubber member containing unvulcanized rubber, and the processing surface of the processing tool is in sliding contact with the joint surface of the rubber member. When the processing tool and the rubber member are relatively moved, the moving means for roughening the bonding surface of the rubber member, and the bonding surface of the rubber member with the roughened bonding surface and the bonding of the rubber member An apparatus for manufacturing a rubber product, comprising: a joining means for joining the surfaces in pressure contact.     5. The rubber product manufacturing apparatus according to claim 4, wherein the processing tool is composed of a rotating body that rotates about an axis, and a plurality of protrusions are provided on an outer peripheral surface that is a processing surface.     6. The apparatus for manufacturing a rubber product according to claim 4, wherein a plurality of parallel narrow grooves are formed on the processing surface of the processing tool so as to define a number of protrusions between the narrow grooves.

Images