JP2007050536A - Manufacturing method of reinforcing layer and manufacturing method of air bladder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily enhance work efficiency by shortening the manufacturing time of an air bladder 1. <P>SOLUTION: A strip like reinforcing member 11 comprising a composite material, which is composed of a nonwoven fabric and a rubber, is pasted on the outer peripheral surface of the crown part 39 in a molding drum 37 along the peripheral direction of the crown part 39 while rotating the molding drum 37 around its drum axis C to mold the top part 21 in a reinforcing layer 9. A strip like reinforcing member 13 is pasted on the outer peripheral surfaces of a pair of the slope parts 41 and 43 in the molding drum 37 along the peripheral direction of the slope parts 41 and 43 to mold a pair of the skirt parts 23 and 25 in the reinforcing layer 9 before the reinforcing layer 9 is detached from the molding drum 37 while rotating the molding drum 37 around its drum axis C. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a reinforcing layer for manufacturing an annular reinforcing layer, which is one of the components of the air bladder, and a method for manufacturing the air bladder for manufacturing the air bladder.

  In recent years, in the tire industry, various developments have been made on an air bladder that supports a vehicle load in place of the tire when the internal pressure of the tire rapidly decreases. The air bladder includes a hollow annular tube that can be filled with air as a working gas, and a reinforcing layer provided on the tube and subjected to vulcanization treatment. The molding of the reinforcing layer, which greatly affects the performance, has been particularly developed, and there is one disclosed in Patent Document 1 as a prior art. Here, the reinforcing layer includes a top portion and a pair of skirt portions formed continuously on both sides of the top portion.

  The prior art relates to a method of manufacturing the annular reinforcing layer using a molding drum, and the molding drum includes a crown portion having an outer peripheral surface approximate to the outer peripheral surface of the air bladder, and the crown. A pair of slope portions each formed continuously on both sides of the portion and configured to become thinner as the distance from the crown portion increases, and one side of the one slope portion and the other side of the other slope portion, respectively A pair of bottom portions that are continuously formed and configured to be smaller in diameter than the outer diameter of the air bladder.

When the annular reinforcing layer is manufactured according to the prior art, first, a band-shaped reinforcing member made of a composite material of rubber and nonwoven fabric is attached to the outer peripheral surface of the crown portion of the molding drum along the circumferential direction. The top portion of the reinforcing layer is molded. The belt-shaped reinforcing member is attached along the circumferential direction from the outer peripheral surface of one of the slope portions to the outer peripheral surface of the one bottom portion of the molding drum, and the belt-shaped reinforcing member is attached to the other of the molding drum. A pair of the skirt portions in the reinforcing layer is molded by sticking along the circumferential direction from the outer peripheral surface of the slope portion to the outer peripheral surface of the other bottom portion. And the manufacture of the said reinforcement layer is complete | finished by removing the said reinforcement layer from the said forming drum.
WO2002 / 096678

  By the way, normally, the air bladder is used for large vehicle tires and is larger than passenger car tires, and accordingly, the molding drum tends to be enlarged. On the other hand, when the molding drum is increased in size, an operator must frequently change the work position when applying the band-shaped reinforcing member, and the manufacturing time of the reinforcing layer, in other words, the air volume is increased. There is a problem that it becomes difficult to improve the working efficiency because the manufacturing time is long.

  Therefore, in order to solve the above-described problem, the present invention is a novel method in which even when the molding drum is enlarged, an operator does not need to frequently change the work position when the band-shaped reinforcing member is attached. A first object is to provide a method for producing a reinforcing layer, and a second object is to provide a novel method for producing an air bladder having a main part in common with a method for producing a new reinforcing layer. And

  The first feature of the present invention is one of the components of the air bladder that supports the vehicle load in place of the tire when the internal pressure of the tire suddenly decreases. In a method for manufacturing a reinforcing layer for manufacturing an annular reinforcing layer having a pair of skirt portions formed continuously on both sides, a crown portion having an outer peripheral surface that approximates the outer peripheral surface of the air bladder; A molding drum having a pair of slope portions each formed continuously on both sides of the crown portion and configured to become narrower as the distance from the crown portion is reduced. The belt-shaped reinforcing member made of a composite material of a nonwoven fabric and rubber is attached to the outer peripheral surface of the crown portion of the molding drum along the circumferential direction. A top portion molding step for molding the top portion; and rotating the molding drum around the drum axis, and extending the belt-shaped reinforcing member along the outer circumferential surface of the pair of slope portions in the molding drum along the circumferential direction. After the skirt part molding process for molding the pair of skirt parts in the reinforcing layer and the top part molding process and the skirt part molding process are finished, the reinforcement layer is removed from the molding drum. A layer removing step.

  Here, the top part molding process and the skirt part molding process may be performed simultaneously regardless of the order of the processes.

  In addition, sticking means including sticking in a stacked state.

  According to the first feature, the belt-shaped reinforcing member is rotated in the circumferential direction on the outer peripheral surface of the crown portion and the outer peripheral surfaces of the pair of slope portions of the molding drum while rotating the molding drum around the drum axis. Since it sticks along, even if the said molding drum enlarges, it is not necessary to change the operator's working position in the case of sticking of the said strip | belt-shaped reinforcement member frequently.

  According to a second feature of the present invention, in addition to the first feature, the molding drum includes one side of one slope portion and the other slope portion in addition to the crown portion and the pair of slope portions. A pair of bottom portions formed continuously on the other side and configured to be smaller in diameter than the outer diameter of the air bladder, and during the skirt molding step, While rotating around the drum axis, the band-shaped reinforcing member is attached along the circumferential direction from the outer peripheral surface of one of the slope portions to the outer peripheral surface of the one bottom portion of the molding drum, and A pair of skirts in the reinforcing layer is formed by sticking a belt-like reinforcing member along the circumferential direction from the outer peripheral surface of the other slope portion to the outer peripheral surface of the other bottom portion of the molding drum. It is to mold the door part.

  A third feature of the present invention is that, in addition to the first feature or the second feature, the band-shaped reinforcing member is simultaneously attached to the pair of slope portions in the molding drum during the skirt portion molding step. is there.

  According to a third feature, during the skirt portion molding step, the band-shaped reinforcing member is simultaneously affixed to the pair of slope portions in the molding drum, so that the time for molding the pair of skirt portions in the reinforcing layer is reduced. Can be shortened.

  According to a fourth feature of the present invention, in addition to any one of the first to third features, the molding drum is rotated at a constant rotational speed during the skirt molding process. is there.

  According to the fourth feature, since the molding drum is rotated at a constant rotational speed during the skirt portion molding step, the process capability index for molding the pair of skirt portions in the reinforcing layer can be increased.

  The fifth feature of the present invention is that the rotational speed of the molding drum during the skirt molding process is 1.0 rpm or more and 5.0 rpm or less.

  Here, the rotational speed of the molding drum in the skirt part molding step is set to 1.0 rpm or more. When the rotational speed of the molding drum is less than 1.0 rpm, the pair of skirt parts in the reinforcing layer This is because it is not possible to sufficiently increase the process capability index for molding. The rotational speed of the molding drum during the skirt molding process is set to 5.0 rpm or less because when the rotational speed of the molding drum exceeds 5.0 rpm, the band-shaped reinforcing member is attached to the slope of the molding drum. This is because it cannot be easily attached to the part.

  According to the fifth feature, since the rotational speed of the molding drum in the skirt portion molding step is 1.0 rpm or more and 5.0 rpm or less, the step for molding the pair of skirt portions in the reinforcing layer The band-shaped reinforcing member can be easily attached to the slope portion of the molding drum while sufficiently increasing the capability index.

  A sixth feature of the present invention is to support a vehicle load in place of the tire when the internal pressure of the tire rapidly decreases, and a hollow annular tube that can be filled with a working gas, and the tube An air bladder manufacturing method for manufacturing an air bladder comprising a top portion and a reinforcing layer having a pair of skirt portions continuously formed on both sides of the top portion. Used as a constituent material, a tube molding step for molding the hollow annular tube, a crown portion having an outer peripheral surface similar to the outer peripheral surface of the air bladder, and formed continuously on both sides of the crown portion, and The molding drum is rotated about the drum axis using a molding drum having a pair of slope portions each configured to become thinner as the distance from the crown portion increases. A top portion molding step of molding the top portion of the reinforcing layer by sticking a band-shaped reinforcing member made of a composite material of nonwoven fabric and rubber along the outer circumferential surface of the crown portion of the molding drum along the circumferential direction; A pair of skirt portions in the reinforcing layer by rotating the molding drum around the drum axis and pasting the belt-like reinforcing members along the circumferential direction on the pair of slope portions in the molding drum. A skirt portion molding step, a top layer molding step, and a skirt portion molding step after the reinforcing layer removing step of removing the reinforcing layer from the molding drum, the tube molding step and the reinforcing layer removing step. After finishing, the tube is inserted inside the reinforcing layer, and the reinforcing layer is assembled to the tube. A layer assembly step is that which is provided.

  Here, the top part molding process and the skirt part molding process may be performed simultaneously regardless of the order of the processes.

  In addition, sticking means including sticking in a stacked state.

  According to a sixth feature, while rotating the molding drum around the drum axis, the belt-shaped reinforcing member is circumferentially applied to the outer peripheral surface of the crown portion and the outer peripheral surfaces of the pair of slope portions in the molding drum. Since it sticks along, even if the said molding drum enlarges, in the case of sticking of the said strip | belt-shaped reinforcement member, an operator does not need to change a working position frequently.

  According to a seventh feature of the present invention, in addition to the sixth feature, in addition to the crown portion and the pair of slope portions, the molding drum includes one side of one slope portion and the other slope portion. A pair of bottom portions formed continuously on the other side and configured to be smaller in diameter than the outer diameter of the air bladder, and during the skirt molding step, While rotating around the drum axis, the band-shaped reinforcing member is attached along the circumferential direction from the outer peripheral surface of one of the slope portions to the outer peripheral surface of the one bottom portion of the molding drum, and A pair of skirts in the reinforcing layer is formed by sticking a belt-like reinforcing member along the circumferential direction from the outer peripheral surface of the other slope portion to the outer peripheral surface of the other bottom portion of the molding drum. It is to mold the door part.

  In an eighth feature of the present invention, in addition to the sixth feature or the seventh feature, during the skirt portion molding step, the belt-shaped reinforcing member is simultaneously circumferentially disposed on the outer peripheral surfaces of the pair of slope portions of the molding drum. It is to paste along the direction.

  According to the eighth feature, during the skirt portion molding step, the band-shaped reinforcing member is simultaneously affixed to the pair of slope portions in the molding drum, so that the time for molding the pair of skirt portions in the reinforcing layer is reduced. Can be shortened.

  According to a ninth feature of the present invention, in addition to any one of the sixth feature to the eighth feature, the molding drum is rotated at a constant rotational speed during the skirt molding process. is there.

  According to the ninth feature, since the molding drum is rotated at a constant rotation speed during the skirt portion molding step, the process capability index for molding the pair of skirt portions in the reinforcing layer can be increased.

  A tenth feature of the present invention is that, in addition to the ninth feature, the rotational speed of the molding drum in the skirt molding step is 1.0 rpm or more and 5.0 rpm or less.

  The reason why the rotational speed of the molding drum in the skirt part molding step is 1.0 rpm or more is that when the rotational speed of the molding drum is less than 1.0 rpm, the pair of skirt parts in the reinforcing layer is molded. This is because the process capability index cannot be sufficiently increased. The rotational speed of the molding drum during the skirt molding process is set to 5.0 rpm or less because when the rotational speed of the molding drum exceeds 5.0 rpm, the band-shaped reinforcing member is attached to the slope of the molding drum. This is because it cannot be easily attached to the part.

  According to the tenth feature, since the rotational speed of the molding drum is 1.0 rpm or more and 5.0 rpm or less, the process capability index for molding the pair of skirt portions in the reinforcing layer is sufficiently increased. The band-shaped reinforcing member can be easily attached to the slope portion of the molding drum.

  According to the invention of any one of claims 1 to 10, even when the molding drum is enlarged, an operator frequently changes the work position when the strip-shaped reinforcing member is attached. Therefore, the production time of the reinforcing layer, in other words, the production time of the air bladder can be shortened, and the work efficiency can be easily improved. In particular, according to the invention described in any one of claims 3 to 5 and 7 to 10, the time for molding the pair of skirt portions in the reinforcing layer is shortened. Therefore, the manufacturing time of the reinforcing layer, in other words, the manufacturing time of the air bladder can be shortened, and the working efficiency can be further improved.

  According to the loading invention according to any one of claims 4, 5, 9, and 10, the process capability index for molding the pair of skirt portions in the reinforcing layer can be increased. Therefore, the work efficiency can be dramatically improved.

  An embodiment of the present invention will be described with reference to FIGS.

  Here, FIGS. 1 and 2 are schematic perspective views of the reinforcing layer molding apparatus according to the embodiment of the present invention, and FIG. 3 is a cross-sectional view of the vulcanization mold apparatus according to the embodiment of the present invention. 4 to 10 are diagrams for explaining a method of manufacturing an air bladder according to an embodiment of the present invention, and FIG. 11 is a perspective view of the air bladder according to an embodiment of the present invention. FIG. 12 is a partial cross-sectional view of the air bladder in the state of being accommodated in the tire according to the embodiment of the present invention.

  As shown in FIGS. 11 and 12, the air bladder 1 according to the embodiment of the present invention is assembled to the rim 5 while being accommodated in the tire 3. In this case, the vehicle load is supported instead of the tire 3 when the pressure drops rapidly.

  The air bladder 1 is provided with a hollow annular air tube 7 that can be filled with air as a working gas. The tube 7 is made of rubber such as natural rubber or butyl rubber. Further, the pressure of the air filled in the tube 7 is equal to or higher than the pressure of the air filled in the tire 3. The working gas filled in the air bladder 1 includes working gases other than air, such as nitrogen gas.

  The tube 7 is provided with a vulcanized reinforcing layer 9, and the reinforcing layer 9 is configured to cover the entire tube 7. For example, a polyamide nonwoven fabric, a polyester nonwoven fabric, a carbon nonwoven fabric, or a rayon. Molded by a band-shaped reinforcing member (a wide band-shaped reinforcing member 11 and a narrow band-shaped reinforcing member 13 (see FIG. 6)) made of a composite material of a nonwoven fabric such as a nonwoven fabric or glass nonwoven fabric and a rubber such as natural rubber or butyl rubber. It is. The reinforcing layer 9 may be provided with an outer skin layer (not shown) formed by a belt-like outer skin member (not shown) made of rubber such as natural rubber or butyl rubber on the outside.

  A plurality of first ridges 15 capable of contacting the outer peripheral surface of the rim 5 are formed on the inner peripheral surface of the reinforcing layer 9, and the bead filler 17 in the tire 3 is in contact with the inner shoulder surface of the reinforcing layer 9. A plurality of possible second ridges 19 are formed. As shown in FIGS. 6 and 7, the reinforcing layer 9 has an annular shape before it is integrally joined to the tube 7 (in other words, in a single state). A pair of skirt portions 23 and 25 formed continuously on both sides of the portion 21 are provided.

  Therefore, when the internal pressure of the tire 3 rapidly decreases due to puncture or the like, the air bladder 1 is expanded and deformed, and is in close contact with the inner peripheral surface of the tire 3. Thus, the vehicle load can be supported by the air bladder 1 instead of the tire 3.

  On the other hand, during normal travel, expansion of the air bladder 1 due to centrifugal force can be suppressed while increasing the rigidity of the tube 7 (in other words, the rigidity of the air bladder 1) by the reinforcing layer 9. Thereby, damage to the air bladder 1 and the tire 3 due to friction between the air bladder 1 and the tire 3 can be eliminated.

  Further, a plurality of first ridges 15 are provided between the inner peripheral surface of the air bladder 1 and the outer peripheral surface of the rim 5, and a plurality of second ridges 19 are provided between the inner shoulder surface of the air bladder 1 and the bead filler 17. In addition, a gap (passage) through which air can pass can be formed, and air circulation in the tire 3 can be enhanced. As a result, the heat dissipating action by the rim 5 can be fully exerted, and the temperature rise or temperature variation in the tire 3 can be suppressed.

  As shown in FIGS. 1 and 2, the reinforcing layer molding apparatus 27 according to the embodiment of the present invention is used when manufacturing the annular reinforcing layer 9 (in other words, when manufacturing the air bladder 1). And a molding apparatus main body 29 is provided. The molding apparatus main body 29 is provided with a bearing member 31, and a drum rotating shaft 33 is rotatably provided on the bearing member 31. A rotation motor 35 is provided in the vicinity of the bearing member 31 in the molding apparatus main body 29, and an output shaft 35 a of the rotation motor 35 is linked to the drum rotation shaft 33.

  The drum rotation shaft 33 is provided with a molding drum 37, and this molding drum 37 can rotate integrally with the drum rotation shaft 33 around a drum axis (axis of the drum rotation shaft 33) C. The details of the configuration of the molding drum 37 are as follows.

  That is, the molding drum 37 includes a crown portion 39, and the crown portion 39 has an outer peripheral surface that can be attached to the wide band-shaped reinforcing member 11 that is similar to the outer peripheral surface of the air bladder 1. In addition, slope portions 41 and 43 are continuously formed on both sides of the crown portion 39, respectively, and the pair of slope portions 41 and 43 are configured to become narrower as the distance from the crown portion 39 increases. , Each has an outer peripheral surface to which a narrow belt-like reinforcing member 13 can be attached. Further, bottom portions 45 and 47 are continuously formed on one side of the one slope portion 41 and the other side of the other slope portion 43, respectively. Each of the outer peripheral surfaces is configured to be smaller than the outer diameter of each of the outer peripheral surfaces, and has an outer peripheral surface to which a narrow band-shaped reinforcing member 13 can be attached.

  The molding drum 37 is segmented into eight divided drums 37s, and the eight divided drums 37s can be expanded / contracted (expanded / contracted) in the drum radial direction of the molding drum 37 by appropriate means. Each is composed. When the eight divided drums 37s are contracted and moved in the drum radial direction, first, the four divided drums (one divided drum) 37s are contracted and moved in the drum radial direction, and then the remaining drums are moved. The four divided drums 37s are contracted and moved in the drum radial direction.

  As shown in FIG. 3, a vulcanization mold apparatus 49 according to an embodiment of the present invention includes a disk-shaped top mold 51 and a disk-shaped under mold 53 that are vertically opposed to each other. The molds 51 can be moved in the vertical direction by appropriate means. An annular outer mold 55 is provided between the top mold 51 and the under mold 53, and the outer mold 55 is segmented into a plurality of divided outer molds 55s. The plurality of divided outer molds 55s can be expanded / contracted (expanded / contracted) in the mold radial direction of the vulcanizing mold apparatus 49 by an appropriate means. Further, an annular inner mold 57 is provided inside the outer mold 55 between the top mold 51 and the under mold 53. The inner mold 57 is connected to a plurality of divided inner molds 57s. The plurality of divided inner molds 57s are segmented and can be expanded / contracted (expanded / contracted) in the mold radial direction by an appropriate means.

  The top mold 51, the under mold 53, the outer mold 55, and the inner mold 57 form an accommodation space V that accommodates the tube 7 assembled with the reinforcing layer 9. Further, the top mold 51, the under mold 53, the outer mold 55, and the inner mold 57 each include a heater 59.

  Then, the manufacturing method of the reinforced air bag concerning embodiment of this invention is demonstrated with reference to FIGS.

  The method for producing the air bladder is a method for producing the air bladder 1, wherein (i) a tube molding step, (ii) a top portion molding step, (iii) a skirt portion molding step, and (iv) a reinforcing layer. An assembly process, and (iv) a reinforcing layer vulcanization process.

(i) Tube forming step As shown in Fig. 4, a hollow rod-shaped half tube 7 'is formed by an extruder (not shown). And as shown in FIG. 5, the one end part and other end part of half tube 7 'are joined, and the hollow annular tube 7 is formed. Further, the tube 7 is appropriately subjected to vulcanization treatment or semi-vulcanization treatment.

(ii) Top portion molding process The outer peripheral surface of the crown portion 39 in the molding drum 37 while the molding drum 37 is rotated about the drum axis C at a constant rotational speed by driving the rotation motor 35. Paste along the circumferential direction. Further, the wide belt-like reinforcing member 11 is overlapped on the outer peripheral surface of the crown portion 39 of the molding drum 37 while rotating the molding drum 37 around the drum axis C at a constant rotational speed by driving the rotation motor 35. Affix (so-called overlapping). Thereby, as shown in FIG. 6, the top part 21 in the reinforcement layer 9 can be shape | molded.

  Here, the rotational speed of the molding drum in the (ii) top part molding step is 1.0 rpm or more and 5.0 rpm or less.

(iii) Skirt part molding step The narrow belt-like reinforcing member 13 is rotated on one side of the slope part 41 of the molding drum 37 while rotating the molding drum 37 around the drum axis C at a constant rotational speed by driving the rotary motor 35. From the outer peripheral surface of the bottom portion 45 to the outer peripheral surface of one of the bottom portions 45, it is spirally attached along the circumferential direction. At the same time, the narrow band-shaped reinforcing member 13 is spirally attached along the circumferential direction from the outer peripheral surface of the other slope portion 43 to the outer peripheral surface of the other bottom portion 47 of the molding drum 37. Thereby, as shown in FIG. 6, a pair of skirt parts 23 and 25 in the reinforcement layer 9 can be shape | molded.

  Here, the rotational speed of the molding drum during the (iii) skirt part molding step is 1.0 rpm or more and 5.0 rpm or less. (Iii) The rotational speed of the molding drum during the skirt part molding step is set to 1.0 rpm or more. When the rotational speed of the molding drum is less than 1.0 rpm, the pair of skirt parts 23 and 25 in the reinforcing layer 9 This is because it is not possible to sufficiently increase the process capability index for molding. The reason why the rotational speed of the molding drum 37 during the skirt part molding step is 5.0 rpm or less is that when the rotational speed of the molding drum 37 exceeds 5.0 rpm, the narrow belt-shaped reinforcing member 13 is removed. This is because it cannot be easily attached to the slope portions 41 and 43 in the molding drum 37.

(Iv) Reinforcing layer removal step After the (ii) top portion molding step and the (iii) skirt portion molding step are completed, the eight divided drums 37s are contracted and moved in the drum radial direction (see FIG. 2). As shown in FIG. 8, the annular reinforcing layer 9 is removed from the molding drum 37. Thereby, manufacture of the cyclic | annular reinforcement layer 9 is complete | finished.

(v) Reinforcing layer assembling step After the (i) tube forming step and the (iv) reinforcing layer removing step are completed, the tube 7 is inserted inside the reinforcing layer 9 as shown in FIGS. Then, one edge portion and the other edge portion of the reinforcing layer 9 are overlapped on the inner peripheral surface side of the tube 7. Thereby, the reinforcing layer 9 can be assembled to the tube 7.

(vi) Reinforcing layer vulcanization step After the (v) reinforcing layer assembling step is completed, as shown in FIG. 10, the tube 7 in which the reinforcing layer 9 is assembled in the accommodation space V in the vulcanizing mold apparatus 49 is attached. Accommodate. Then, by vulcanizing the reinforcing layer 9 while pressurizing the inside of the tube 7, a plurality of first ridges 15 are formed on the inner peripheral surface of the reinforcing layer 9 and the inner side of the reinforcing layer 9 is formed. While the plurality of second ridges 19 are formed on the shoulder surface, the rigidity of the reinforcing layer 9 is enhanced. Further, while moving the top mold 51 upward, the plurality of divided outer molds 55s are expanded and moved in the mold radial direction, and the plurality of divided inner molds 57s are contracted and moved in the mold radial direction. The air bladder 7 can be taken out from the vulcanizing mold device 49.

  Thus, the production of the air bladder 1 is completed.

  Here, the (ii) top portion molding step and the (iii) skirt portion molding step may be performed at the same time regardless of the order of the steps. In addition, the method for producing an air bladder according to the embodiment of the present invention includes the step (ii) after the top part molding step and the (iii) skirt part molding step are completed, and the step (iv) the reinforcing layer removing step. Before starting, the outer skin layer may be molded by sticking the belt-like outer skin member to the belt-like reinforcing members 11 and 13 already pasted.

  A part of the method for manufacturing an air bladder according to the embodiment of the present invention by including the (ii) top portion molding step, the (iii) skirt portion molding step, and the (iv) reinforcing layer removal step. Can be regarded as a method for manufacturing a supply layer for manufacturing the annular reinforcing layer 9.

  Then, the effect | action and effect of embodiment of this invention are demonstrated.

  While the molding drum 37 is rotated about the drum axis C, the narrow band-shaped reinforcing member 13 is formed on the outer peripheral surface of the crown portion 39, the outer peripheral surfaces of the pair of slope portions 41 and 43, and the pair of bottom portions in the molding drum 37. Since it sticks on the outer peripheral surface of 45 and 47 along the circumferential direction, even if the molding drum 37 enlarges, it is necessary for an operator to change a work position frequently when sticking the strip | belt-shaped reinforcement members 11 and 13. FIG. Absent. In particular, during the (iii) skirt portion molding step, the narrow band-shaped reinforcing member 13 is simultaneously attached to the pair of slope portions 41 and 43 in the molding drum 37, so that the pair of skirt portions 23 and 25 in the reinforcing layer 9. The molding time can be shortened. In particular, the narrow band-shaped reinforcing member 13 is attached to the molding drum 37 from the outer peripheral surface of the one slope portion 41 to the outer peripheral surface of the one bottom portion 45 at the same time. Since it sticks over the outer peripheral surface of the other slope part 43 from the outer peripheral surface of the other bottom part 47, the time which shape | molds a pair of skirt parts 23 and 25 in the reinforcement layer 9 can be shortened.

  In addition, since the rotational speed of the molding drum 37 during the skirt part molding step is 1.0 rpm or more and 5.0 rpm or less, the process for molding the pair of skirt parts 23 and 25 in the reinforcing layer 9. The narrow band-shaped reinforcing member 13 can be easily attached to the slope portions 41 and 43 in the molding drum 37 while sufficiently increasing the capability index.

  As described above, according to the embodiment of the present invention, even if the molding drum 37 is enlarged, it is not necessary for the operator to frequently change the working position when the band-shaped reinforcing members 11 and 13 are attached. The manufacturing time of the layer 9, in other words, the manufacturing time of the air bladder 1 can be shortened, and the working efficiency can be easily improved. In particular, since the time for molding the pair of skirt portions 23 and 25 in the reinforcing layer 9 can be shortened, the manufacturing time of the air bladder 1 can be shortened and the working efficiency can be further improved.

  Moreover, since the process capability index | exponent about shaping | molding of a pair of skirt parts 23 and 25 in the reinforcement layer 9 can be raised, work efficiency can be improved greatly.

  The present invention can be implemented in various modes other than the above-described embodiments. Further, the scope of rights encompassed by the present invention is not limited to these embodiments.

  Next, examples of the present invention will be briefly described.

When the pair of skirt portions 23 and 25 in the reinforcing layer 9 is molded while intermittently rotating the molding drum 37 (comparative example), the reinforcing layer is rotated while rotating the molding drum 37 at a constant rotational speed (always rotating). 9, when the pair of skirt portions 23 and 25 is molded (Example), the process capability index for molding one skirt portion (left skirt portion) 23 in the reinforcing layer 9 and the other skirt portion in the reinforcing layer 9 Table 1 shows a comparison of the process capability index for molding the (right skirt portion) 25 and the molding time of the pair of skirt portions 23 and 25 in the reinforcing layer 9.

It is a typical perspective view of the reinforcement layer shaping | molding apparatus concerning embodiment of this invention, Comprising: The shaping | molding drum of a normal state is shown. It is a typical figure of the reinforcement layer shaping | molding apparatus concerning embodiment of this invention, Comprising: The division | segmentation drum has shown the state which moves to a drum radial direction. It is sectional drawing of the vulcanization mold apparatus concerning embodiment of this invention. It is a figure explaining the manufacturing method of the pneumatic bladder concerning embodiment of this invention, Comprising: The state which shape | molded the hollow rod-shaped half tube is shown. It is a figure explaining the manufacturing method of the air bladder concerning embodiment of this invention, Comprising: The state which shape | molded the hollow annular tube is shown. It is a figure explaining the manufacturing method of the air bladder concerning embodiment of this invention, Comprising: The state which shape | molded the reinforcement layer is shown. It is a figure explaining the manufacturing method of the air bladder concerning embodiment of this invention, Comprising: The state which removed the reinforcement layer from the molding drum is shown. It is a figure explaining the manufacturing method of the pneumatic bladder concerning embodiment of this invention, Comprising: The state before making the 1 edge part and other edge part of a reinforcement layer overlap on the inner peripheral surface side of a tube is shown. It is a figure explaining the manufacturing method of the air bladder concerning embodiment of this invention, Comprising: The state which assembled | attached the reinforcement layer and the tube is shown. It is a figure explaining the manufacturing method of the pneumatic bladder concerning embodiment of this invention, Comprising: The state which accommodated the reinforcement layer and the tube in the accommodating part of the vulcanization mold apparatus is shown.

It is a schematic diagram which shows the state which removed from the shaping | molding drum.
It is a perspective view of the air bladder concerning the embodiment of the present invention. It is a fragmentary sectional view of the air bladder of the state accommodated in the tire concerning embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air bladder 3 Tire 7 Tube 7 'Half tube 9 Reinforcement layer 11 Wide strip | belt-shaped reinforcement member 13 Narrow strip | belt-shaped reinforcement member 21 Top part 23,25 Skirt part 37 Molding drum 39 Crown part 41,43 Slope part 45,47 Bottom 49 Vulcanizing mold equipment

Claims (10)

One of the components of the air bladder that supports the vehicle load in place of the tire when the internal pressure of the tire is drastically decreased, and a pair formed continuously on both sides of the top portion and the top portion In the manufacturing method of a reinforcing layer for manufacturing an annular reinforcing layer having a skirt portion of
A crown portion having an outer peripheral surface approximating the outer peripheral surface of the air bladder, and a pair of slope portions respectively formed continuously on both sides of the crown portion and configured to become thinner as the distance from the crown portion increases. A belt-shaped reinforcing member made of a composite material of a nonwoven fabric and rubber is provided along the outer circumferential surface of the crown portion of the molding drum in the circumferential direction while rotating the molding drum about the drum axis. A top part molding step for molding the top part in the reinforcing layer,
While rotating the molding drum about the drum axis, the band-shaped reinforcing member is attached to the outer peripheral surfaces of the pair of slope portions in the molding drum along the circumferential direction, thereby the pair of the reinforcing layers in the reinforcing layer. A skirt molding process for molding the skirt,
A reinforcing layer removing step of removing the reinforcing layer from the molding drum after the top portion molding step and the skirt portion molding step are completed;
The manufacturing method of the reinforcement layer characterized by comprising. The molding drum is formed continuously on one side of the one slope portion and the other side of the other slope portion, in addition to the crown portion and the pair of slope portions, and has an outer diameter of the air bladder. A pair of bottom parts configured to have a smaller diameter,
During the skirt portion molding step, the belt-shaped reinforcing member is rotated from the outer peripheral surface of one slope portion to the outer peripheral surface of one bottom portion of the molding drum while rotating the molding drum around the drum axis. And pasting along the circumferential direction, and pasting the strip-shaped reinforcing member along the circumferential direction from the outer peripheral surface of the other slope portion to the outer peripheral surface of the other bottom portion of the molding drum, The method for manufacturing a reinforcing layer according to claim 1, wherein a pair of the skirt portions in the reinforcing layer is molded.   3. The method for manufacturing a reinforcing layer according to claim 1, wherein the band-shaped reinforcing member is simultaneously attached to the pair of slope portions of the molding drum during the skirt portion molding step.   The method for manufacturing a reinforcing layer according to any one of claims 1 to 3, wherein the molding drum is rotated at a constant rotational speed during the skirt portion molding step.   5. The method for manufacturing a reinforcing layer according to claim 4, wherein a rotation speed of the molding drum in the skirt portion molding step is 1.0 rpm or more and 5.0 rpm or less. A hollow annular tube that supports a vehicle load in place of the tire when the internal pressure of the tire suddenly decreases, and can be filled with a working gas, and a top portion and the top portion provided in the tube In the method for producing an air bladder for producing an air bladder comprising a reinforcing layer having a pair of skirt portions formed continuously on both sides of the air bladder,
Using a rubber as a constituent material, a tube molding process for molding the hollow annular tube,
A crown portion having an outer peripheral surface approximating the outer peripheral surface of the air bladder, and a pair of slope portions respectively formed continuously on both sides of the crown portion and configured to become thinner as the distance from the crown portion increases. A belt-shaped reinforcing member made of a composite material of a nonwoven fabric and rubber is provided along the outer circumferential surface of the crown portion of the molding drum in the circumferential direction while rotating the molding drum about the drum axis. A top part molding step for molding the top part in the reinforcing layer,
While rotating the molding drum around the drum axis, the band-shaped reinforcing members are attached to the pair of slope portions in the molding drum along the circumferential direction, thereby forming the pair of skirt portions in the reinforcing layer. The skirt part molding process to mold,
A reinforcing layer removing step of removing the reinforcing layer from the molding drum after the top portion molding step and the skirt portion molding step are completed;
After the tube forming step and the reinforcing layer removing step are completed, the tube is inserted into the reinforcing layer, and the reinforcing layer is assembled to the tube.
A method for producing an air bag, comprising: The molding drum is formed continuously on one side of the one slope portion and the other side of the other slope portion, in addition to the crown portion and the pair of slope portions, and has an outer diameter of the air bladder. A pair of bottom parts configured to have a smaller diameter,
During the skirt portion molding step, the belt-shaped reinforcing member is rotated from the outer peripheral surface of one slope portion to the outer peripheral surface of one bottom portion of the molding drum while rotating the molding drum around the drum axis. And pasting along the circumferential direction, and pasting the strip-shaped reinforcing member along the circumferential direction from the outer peripheral surface of the other slope portion to the outer peripheral surface of the other bottom portion of the molding drum, The method for producing an air bladder according to claim 6, wherein the pair of skirt portions in the reinforcing layer is molded.   The air according to claim 6 or 7, wherein, during the skirt portion molding step, the band-shaped reinforcing member is simultaneously attached along the circumferential direction to the outer peripheral surfaces of the pair of slope portions of the molding drum. Nou's manufacturing method.   The method for producing an air bladder according to any one of claims 6 to 8, wherein the molding drum is rotated at a constant rotational speed during the skirt portion molding step.   The method for producing an air bladder according to claim 9, wherein a rotation speed of the molding drum in the skirt portion molding step is 1.0 rpm or more and 5.0 rpm or less.

Images