JP4252244B2 - Method for manufacturing anti-vibration molded body - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention , Prevention The present invention relates to a method for manufacturing a vibration molded body.
[0002]
[Prior art]
Anti-vibration molded bodies for blocking transmission of vibration are used for automobile steering, engines, and the like.
[0003]
As such an anti-vibration molded article, Japanese Utility Model Laid-Open No. 5-64544, Japanese Patent Application Laid-Open No. 8-125178, Japanese Patent Application Laid-Open No. 11-201179, and Japanese Patent Application Laid-Open No. 2000-65113 include an outer pipe, An inner pipe provided coaxially and a rubber molded body that is interposed between them and connects both pipes are disclosed.
[0004]
[Problems to be solved by the invention]
By the way, as shown in FIGS. 13A to 13C, the vibration-proof molded body 60 as described above has vulcanized adhesives 64 and 67 on the inner peripheral surface of the outer pipe 61 and the outer peripheral surface of the inner pipe 62. It is manufactured by applying and vulcanizing and molding an unvulcanized rubber to be a rubber molded body 63 between them. At this time, in order to develop a predetermined spring characteristic in the axial direction, at the contact portion of the inner pipe 62 with the rubber molded body 63, the bonded portion 65 and the non-bonded portion 66 are bonded together via the vulcanized adhesive 67. And form. That is, as shown in FIG. 13B, the vulcanized adhesive 67 is applied only to a portion that becomes the bonding portion 65 of the inner pipe 62. On the other hand, the spring characteristics in the axial direction are sensitive to the width of the bonding portion 65. As shown in FIG. 14, even if the spring characteristics in the axial direction are equal, the difference in the width of the bonding portion 65 is small. In the case where the bonding portion 65 is wide (● in the figure), the spring characteristic in the axial direction is higher than that in the case where the bonding part 65 is narrow (◯ in the figure). Therefore, in manufacturing the vibration-proof molded body 60, the variation in the width of the adhesive portion 65 is large, so that the variation in the spring characteristic in the axial direction of the product is large, and the inner pipe 62 is applied by hand coating. Since a high degree of accuracy is required when applying the sulfur adhesive 67, there arises a problem that the manufacturing time is increased and the cost is increased. Although these problems can be slightly improved by masking the non-adhesive portion 66 with a tape before applying the vulcanized adhesive 67 and removing the masking after applying the vulcanized adhesive 67, these problems are caused by this method. However, it cannot be said that the vulcanized adhesive 67 inevitably flows under the masking.
[0005]
Further, as shown in FIG. 15, the rubber molded body 73 is formed with a stopper portion 73 a that is in contact with the inner peripheral surface of the outer pipe 71 and restricts displacement of the inner pipe 72 in a direction perpendicular to a predetermined axis. There is a vibration molded body 70. In such a vibration-proof molded body 70, as indicated by a solid line in FIG. 16, the stopper portion 73a comes into contact with the inner peripheral surface of the outer pipe 71 immediately after the inner pipe 72 starts to be displaced in the direction perpendicular to the predetermined axis. It is desirable to regulate the displacement of the inner pipe 72 to develop high elasticity. Therefore, the clearance between the stopper portion 73a and the inner peripheral surface of the outer pipe 71 is preferably close to zero. However, in the manufacture of the vibration-proof molded body 70, a vulcanized adhesive is applied to the inner peripheral surface of the outer pipe 71 and the outer peripheral surface of the inner pipe 72, and unvulcanized rubber that becomes the rubber molded body 73 is disposed between them. Since it is necessary to prevent the stopper portion 73a from being vulcanized and bonded to the inner peripheral surface of the outer pipe 71, it is necessary to ensure a certain amount of clearance between them. Although it is considered that it is not necessary to apply a vulcanized adhesive to a portion of the inner peripheral surface of the outer pipe 71 that becomes the non-adhesive portion 76 with which the stopper portion 73a abuts, a portion that becomes the non-adhesive portion 76 in the process of vulcanization molding There is no denying the possibility of vulcanized adhesive flowing into the tank. Therefore, as shown by a broken line in FIG. 16, only the performance that the stopper portion 73a abuts against the inner peripheral surface of the outer pipe 71 and develops high elasticity after the inner pipe 72 is displaced to some extent in the direction perpendicular to the predetermined axis. There is a problem that can not be.
[0006]
The present invention has been made in view of such a point, and the object of the present invention is to prevent adhesion of an adhesive to a portion to be a non-adhesive portion. Prevention It is providing the manufacturing method of a vibration molded object.
[0007]
[Means for Solving the Problems]
In the present invention, a portion that becomes a non-adhesive portion after an adhesive is attached to a predetermined portion is covered with a covering member so as not to be removable.
[0008]
In particular ,Book The invention includes an outer pipe, an inner pipe provided in the outer pipe with the same axial direction, and a rubber molded body interposed therebetween, and the outer pipe and the inner pipe This is a method for producing a vibration-proof molded body in which at least one and the rubber molded body are in contact with each other through an adhesive portion bonded via a vulcanized adhesive and a non-adhesive portion. And after attaching a vulcanization adhesive to the part used as the adhesion part of an outer pipe and / or an inner pipe, the part used as the non-adhesion part of the outer pipe and / or inner pipe which adhered this vulcanization adhesive The outer pipe and / or the inner pipe and the rubber molded body are molded by vulcanization without forming a rubber molded body on the coating member so that it cannot be removed. .
[0009]
If it does as mentioned above, since it is made to coat | cover the part which becomes a non-adhesion part with the coating | coated member so that it cannot attach or detach, after attaching a vulcanization adhesive to the part which becomes an adhesion part, to the part used as a non-adhesion part Since the adhesion of the vulcanized adhesive is effectively prevented and the variation in the width of the bonded portion can be reduced, the variation in the spring characteristics in the axial direction of the manufactured vibration-proof molded body is also small. It can be. Also, even if a vulcanized adhesive adheres to a part that will become a non-adhesive part, that part will be covered with a covering member so that it cannot be removed later. Therefore, the manufacturing time can be shortened and the cost can be reduced as compared with the prior art.
[0010]
In this case, the vibration-proof molded body is provided with a convex portion on the non-adhered portion of the outer pipe and the inner pipe having the non-adhered portion, and the convex portion is provided on the other side via the rubber molded body. If the torsional rigidity is increased by fitting the convex portion with the concave portion, the convex portion is integrated with the covering member that covers the non-adhesive portion. You may make it form. By doing so, it is not necessary to form a convex portion on the pipe, and in particular, when a resin is used as a covering member, a portion that becomes a non-adhesive portion of the cylindrical pipe is formed by a covering member by, for example, injection molding. Since it suffices to form a convex portion while covering, the constituent members are simpler than those in which the convex portion is directly formed on the pipe, and the manufacture is easy.
[0011]
The present invention relates to an outer pipe, an inner pipe provided in the outer pipe with the same axial direction, and an inner pipe interposed between the outer pipe and a predetermined shaft of the inner pipe. A rubber molded body formed with a stopper portion that regulates a certain amount of displacement in a straight direction, and the outer pipe and the rubber molded body are bonded via a vulcanized adhesive. Is the method. Then, after the vulcanized adhesive is attached to the inner peripheral surface of the outer pipe, the portion that becomes the non-adhesive portion in contact with the stopper portion of the rubber molded body on the inner peripheral surface is covered with a covering member so as not to be removable, An integral body of the outer pipe and the rubber molded body is molded by vulcanization adhesion without bonding the rubber molded body to the covering member.
[0012]
If it does as mentioned above, since the part which becomes a non-adhesive part after making a vulcanization adhesive adhere to the inner peripheral surface of an outer pipe is covered with a covering member so that it cannot be removed, the part which becomes a non-adhesive part Exposure of the vulcanized adhesive is effectively prevented, and the stopper portion can be prevented from being vulcanized and bonded to the inner peripheral surface of the outer pipe, and the clearance between them is almost zero, and the inner It is also possible to manufacture an anti-vibration molded body having the performance of exhibiting high elasticity when the stopper portion comes into contact with the inner peripheral surface of the outer pipe immediately after the pipe starts to be displaced in the direction perpendicular to the predetermined axis. Moreover, since complicated coating of the vulcanized adhesive on the inner peripheral surface of the outer pipe is not necessary, the manufacturing time can be shortened and the cost can be reduced as compared with the conventional case.
[0013]
In this case, surface irregularities that prevent the generation of sound when the stopper portion of the rubber molded body abuts may be formed on the covering member. By doing in this way, the covering member that covers the non-adhesive part and prevents the stopper part from adhering to the inner peripheral surface of the outer pipe has a function of preventing the generation of sound when the stopper part abuts. It will be added. Further, conventionally, a sound generation preventing member having surface irregularities is formed by rubber during vulcanization molding, and due to restrictions in the manufacturing process, the protrusions extending in the axial direction are spaced apart as the surface irregularities of the sound generation preventing member. However, in the above manner, it is possible to apply various forms of surface irregularities of the covering member, and thus effectively prevent the generation of sound. Can do.
[0014]
【The invention's effect】
As described above, according to the present invention, the adhesive or vulcanized adhesive is adhered to the part that becomes the adhesive part, and the part that becomes the non-adhesive part is covered with the covering member so that it cannot be detached. It is possible to effectively prevent the adhesive or vulcanized adhesive from adhering to the part.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
(Embodiment 1)
FIG. 1 shows a vibration-proof molded body 10 manufactured by the manufacturing method of Embodiment 1 of the present invention.
[0017]
The vibration-proof molded body 10 includes an outer pipe 11, an inner pipe 12 provided coaxially in the outer pipe 11, and a rubber molded body 13 interposed so as to be filled therebetween.
[0018]
The outer pipe 11 and the inner pipe 12 are both made of metal (rigid body), and the latter is longer and smaller in diameter than the former. Under actual use, either one is coupled to the vibration source side and the other is coupled to the vibration receiving side.
[0019]
The rubber molded body 13 is made of a rubber composition such as natural rubber and absorbs vibration due to its viscoelastic characteristics.
[0020]
In the outer pipe 11 and the rubber molded body 13, all of their contact portions, that is, the inner peripheral surface of the outer pipe 11 and the outer peripheral surface of the rubber molded body 13 are bonded and integrated through a vulcanizing adhesive 14.
[0021]
The inner pipe 12 and the rubber molded body 13 have half of their contact portions, that is, one half in the axial direction is an adhesive portion 15 and the other half is a non-adhesive portion 16, and the former is a vulcanized adhesive 17. In the latter case, the resin covering member 18 is formed between the inner pipe 12 and the rubber molded body 13 so as to cover the vulcanized adhesive 17 on the outer peripheral surface of the inner pipe 12. It is interposed between.
[0022]
The manufacturing method of this vibration-proof molded object 10 is demonstrated based on FIG.
[0023]
First, as shown in FIG. 2A, the vulcanized adhesives 14 and 17 are applied and adhered to the entire inner peripheral surface of the outer pipe 11 and the entire outer peripheral surface of the inner pipe 12, and then dried. As the vulcanized adhesives 14 and 17, those obtained by dissolving an adhesive rubber and a resin in an organic solvent are used (for example, trade name manufactured by Road Far East Co., Ltd .: Chemlock, etc.). In order to improve the adhesion of the vulcanized adhesives 14 and 17, a primer may be applied to the base.
[0024]
Next, by setting the inner pipe 12 in an injection mold and injecting molten resin into the mold, as shown in FIG. A covering member 18 made of a resin layer that covers the portion 16 to be unremovable is formed.
[0025]
Then, as shown in FIG. 2 (c), the unvulcanized rubber composition 13 'for the outer pipe 11, the inner pipe 12 and the rubber molded body 13 is set in a molding die, and heated and pressurized for a predetermined time. Is vulcanized and molded. At this time, the unvulcanized rubber composition 13 ′ is formed into the rubber molded body 13 by vulcanization, and the outer pipe 11 and the rubber molded body 13, the adhesive portion 15 of the inner pipe 12 and the rubber molded body 13 are vulcanized. Sulfur bonded.
[0026]
According to the manufacturing method of the vibration-proof molded body 10 described above, the portion that becomes the non-adhesive portion 16 is covered with the covering member 18 so that it cannot be detached after the vulcanized adhesive 17 is attached to the portion that becomes the adhesive portion 15. Therefore, the adhesion of the vulcanized adhesive 17 to the portion that becomes the non-adhesive portion 16 is effectively prevented, and thereby the variation in the width of the adhesive portion 15 can be reduced. Variations in the axial spring characteristics of the vibration molded body 10 can also be reduced.
[0027]
Further, the vulcanized adhesive 17 is also applied to the portion that becomes the non-adhesive portion 16, but this portion is later covered with the covering member 18 so as not to be removable, and therefore when the vulcanized adhesive 17 is applied. Therefore, the manufacturing time can be shortened and the cost can be reduced as compared with the prior art.
[0028]
(Embodiment 2)
FIG. 3 shows a vibration-proof molded body 20 manufactured by the manufacturing method of Embodiment 2 of the present invention.
[0029]
The vibration-proof molded body 20 includes an outer pipe 21, an inner pipe 22 provided coaxially in the outer pipe 21, and a rubber molded body 23 interposed so as to be filled therebetween.
[0030]
The outer pipe 21 and the inner pipe 22 are both made of metal (rigid body), and the latter is longer and smaller in diameter than the former. Under actual use, either one is coupled to the vibration source side and the other is coupled to the vibration receiving side. On the outer periphery of the inner pipe 22, a pair of convex portions 22 a and 22 a formed of protrusions integrally formed so as to extend from the central portion in the axial direction to one end are provided so as to be symmetrical in cross section. Further, on the inner periphery of the outer pipe 21, there are provided recesses 21a, 21a corresponding to the protrusions 22a, 22a of the inner pipe 22 through which the protrusions 22a, 22a are fitted via rubber molded bodies 23. . The torsional rigidity of the vibration-proof molded body 20 is enhanced by the fitting of the convex portions 22a and the concave portions 21a.
[0031]
The outer pipe 21 and the rubber molded body 23 are such that all of their contact portions, that is, the inner peripheral surface of the outer pipe 21 (including the recess 21a) and the outer peripheral surface of the rubber molded body 23 are interposed via the vulcanizing adhesive 24. Bonded and integrated.
[0032]
In the inner pipe 22 and the rubber molded body 23, a half of the contact portion thereof, that is, a side half where the convex portion 22a is not provided is an adhesive portion 25 and a side half where the convex portion is provided is a non-adhesive portion 26. In the former, both of them are bonded and integrated through a vulcanized adhesive 27, whereas in the latter, a resin covering member 28 is used to cover the vulcanized adhesive 27 on the outer peripheral surface of the inner pipe 22. It is interposed between the pipe 22 and the rubber molded body 23.
[0033]
Other configurations are the same as those of the first embodiment.
[0034]
The manufacturing method of this vibration-proof molded object 20 is demonstrated based on FIG.
[0035]
First, as shown in FIG. 4A, vulcanized adhesives 24 and 27 are applied to the entire inner peripheral surface of the outer pipe 21 and the entire outer peripheral surface of the inner pipe 22, and then dried. Similar to the first embodiment, the vulcanized adhesives 24 and 27 and the primer used may be used.
[0036]
Next, by setting the inner pipe 22 in an injection mold and injecting molten resin into the mold, as shown in FIG. 4 (b), the convex portion 22a in the axial direction of the inner pipe 22 is provided. The outer peripheral surface of the non-side half, that is, the portion that becomes the contact portion 25 is left as it is, and the outer peripheral surface of the side half provided with the axial convex portion 22a of the inner pipe 22, that is, the portion that becomes the non-adhesive portion 26 is removed. A covering member 28 made of a resin layer that cannot be covered is formed.
[0037]
Then, as shown in FIG. 4 (c), the unvulcanized rubber composition 23 ′ for the outer pipe 21, the inner pipe 22 and the rubber molded body 23 is set in a molding die, and heated and pressurized for a predetermined time. Is vulcanized and molded. At this time, the unvulcanized rubber composition 23 ′ is formed into a rubber molded body 23 by vulcanization, and the outer pipe 21 and the rubber molded body 23, and the adhesive portion 25 of the inner pipe 22 and the rubber molded body 23 are vulcanized. Sulfur bonded.
[0038]
Actions and effects are the same as those of the first embodiment.
[0039]
(Embodiment 3)
FIG. 5 shows a vibration-proof molded body 30 manufactured by the manufacturing method of Embodiment 3 of the present invention.
[0040]
In the vibration-proof molded body 30, the inner pipe 32 has a cylindrical shape, and a convex portion 32 a is formed on the covering member 38 that covers the non-bonded portion 36 of the inner pipe 32.
[0041]
Other configurations are the same as those of the second embodiment.
[0042]
The manufacturing method of this vibration-proof molded object 30 is demonstrated based on FIG.
[0043]
First, as shown in FIG. 6A, the vulcanized adhesives 34 and 37 are applied to the entire inner peripheral surface of the outer pipe 31 and the entire outer peripheral surface of the inner pipe 32, and then dried. The point which may use the vulcanization adhesives 34 and 37 and primer which are used is the same as that of Embodiment 1.
[0044]
Next, by setting the inner pipe 32 in an injection mold and injecting molten resin into the mold, as shown in FIG. 6 (b), the side where the convex portion 32a in the axial direction of the inner pipe 32 is not provided. The outer peripheral surface of the half, that is, the portion that becomes the contact portion 35 is left as it is, and the outer peripheral surface of the side half that is provided with the convex portion 32a in the axial direction of the inner pipe 32, that is, the portion that becomes the non-adhesive portion 36 is covered unremovably. The covering member 28 made of a resin layer and having the convex portions 32a is formed. At this time, as shown in FIG. 7, a fitting recess 39 is formed in advance in the non-bonding portion 36 of the inner pipe 32, and a covering member 38 is formed therein to prevent movement and rotation in the axial direction. You may make it do.
[0045]
Then, as shown in FIG. 6C, the unvulcanized rubber composition 33 ′ for the outer pipe 31, the inner pipe 32 and the rubber molded body 33 is set in a molding die and heated and pressurized for a predetermined time. Is vulcanized and molded. At this time, the unvulcanized rubber composition 33 ′ is formed into a rubber molded body 33 by vulcanization, and the outer pipe 31 and the rubber molded body 33, and the adhesive portion 35 of the inner pipe 32 and the rubber molded body 33 are vulcanized. Sulfur bonded.
[0046]
According to the manufacturing method of the vibration-proof molded body 30 described above, it is not necessary to directly form the convex portion 32a on the inner pipe 32, and a portion to be the non-adhesive portion 36 of the cylindrical inner pipe 32 is formed by injection molding. Since it is sufficient to coat the covering member 38 and form the convex portion 32a, the constituent members are simpler than those in which the convex portion 32a is directly formed on the inner pipe 32, and the manufacturing is easy.
[0047]
Other operations and effects are the same as those of the first embodiment.
[0048]
(Embodiment 4)
FIG. 8 shows a vibration-proof molded body 40 manufactured by the manufacturing method according to Embodiment 4 of the present invention.
[0049]
The vibration-proof molded body 40 includes an outer pipe 41, an inner pipe 42 provided coaxially in the outer pipe 41, and a rubber molded body 43 interposed therebetween.
[0050]
Both the outer pipe 41 and the inner pipe 42 are made of metal (rigid body), and the latter is longer and smaller in diameter than the former. Under actual use, either one is coupled to the vibration source side and the other is coupled to the vibration receiving side.
[0051]
The rubber molded body 43 is made of a rubber composition such as natural rubber and absorbs vibration due to its viscoelastic characteristics. Further, the rubber molded body 43 is formed in such a shape as to pass in a cross-sectional substantially “<” shape from one of the inner sides of the outer pipe 41 to the other substantially opposite thereto, and at the axial position of the outer pipe 41. The inner pipe 42 is held. The top of the rubber molded body 43 having a substantially “<” cross section is in contact with the inner peripheral surface of the outer pipe 41 to prevent the inner pipe 42 from being displaced more than a certain amount in the direction perpendicular to the axis (the direction of the top). The stopper portion 43a is configured, and the clearance between the stopper portion 43a and the inner peripheral surface of the outer pipe 41 is substantially zero.
[0052]
The outer pipe 41 and the rubber molded body 43 are integrated by bonding both end portions of the rubber molded body 43 having a substantially “<” shape in cross section to the inner peripheral surface of the outer pipe 41 via a vulcanizing adhesive 44. ing. The portion of the outer pipe 41 with which the stopper portion 43a abuts is a non-adhesive portion 46, and the inner and outer peripheral surfaces of the outer pipe 41 corresponding to the non-adhesive portion 46 are covered with a resin thin film covering member 48 so as not to be removable. Has been.
[0053]
The inner pipe 42 and the rubber molded body 43 are bonded and integrated through the vulcanized adhesive 47 at all of their contact portions, that is, the inner peripheral surface of the inner pipe 41 and the outer peripheral surface of the rubber molded body 43.
[0054]
The manufacturing method of this vibration-proof molded object 40 is demonstrated based on FIG.
[0055]
First, as shown in FIG. 9A, vulcanized adhesives 44 and 47 are applied and adhered to the entire inner peripheral surface of the outer pipe 41 and the entire outer peripheral surface of the inner pipe 42, and then dried. The point which may use the vulcanization adhesives 44 and 47 and primer which are used is the same as that of Embodiment 1.
[0056]
Next, by setting the outer pipe 41 in an injection mold and injecting a molten resin into the mold, as shown in FIG. A covering member 48 made of a thin film resin that covers the peripheral surface and the outer peripheral surface in a non-detachable manner is formed.
[0057]
Then, as shown in FIG. 9C, the unvulcanized rubber composition 43 ′ for the outer pipe 41, the inner pipe 42 and the rubber molded body 43 is set in a molding die, and heated and pressurized for a predetermined time. Is vulcanized and molded. At this time, the unvulcanized rubber composition 43 ′ is formed on the rubber molded body 43 by vulcanization, and the outer pipe 41 and the rubber molded body 43 are vulcanized and bonded to the inner pipe 42 and the rubber molded body 43. .
[0058]
According to the manufacturing method of the vibration-proof molded body 40 described above, the portion that becomes the non-bonded portion 46 after the vulcanized adhesive 44 is attached to the inner peripheral surface of the outer pipe 41 is covered with the covering member 48 so as not to be removable. Therefore, the exposure of the vulcanized adhesive 44 to the non-bonded portion 46 is effectively prevented, and the stopper portion 43a can be prevented from being vulcanized and bonded to the inner peripheral surface of the outer pipe 41. Thus, the clearance between them is almost zero, and therefore, immediately after the inner pipe 42 starts to be displaced in the direction perpendicular to the predetermined axis, the stopper portion 43a comes into contact with the inner peripheral surface of the outer pipe 41 and exhibits high elasticity. Therefore, it is possible to manufacture the vibration-proof molded body 40 having the performance of
[0059]
Moreover, since complicated coating of the vulcanized adhesive 47 on the inner peripheral surface of the outer pipe 41 is not required, the manufacturing time can be shortened and the cost can be reduced as compared with the conventional case.
[0060]
(Embodiment 5)
FIG. 10 shows a vibration-proof molded body 50 manufactured by the manufacturing method according to Embodiment 5 of the present invention.
[0061]
The anti-vibration molded body 50 has surface irregularities that prevent the generation of sound when the stopper portion 53 a comes into contact with the covering member 58 that covers the non-bonded portion 56 of the outer pipe 51.
[0062]
Other configurations are the same as those of the fourth embodiment.
[0063]
The manufacturing method of this vibration-proof molded object 50 is demonstrated based on FIG.
[0064]
First, as shown in FIG. 11A, vulcanized adhesives 54 and 57 are applied and adhered to the entire inner peripheral surface of the outer pipe 51 and the entire outer peripheral surface of the inner pipe 52, and then dried. The point which may use the vulcanization adhesives 54 and 57 and primer which are used is the same as that of Embodiment 1.
[0065]
Next, by setting the outer pipe 51 in an injection mold and injecting a molten resin into the mold, as shown in FIG. A covering member 58 made of a thin film resin that covers the peripheral surface and the outer peripheral surface in a non-detachable manner is formed. As a shape of the covering member formed at this time, as shown in FIG. 12A, as shown in FIG. 12B, as shown in FIG. There are no particular limitations on the shape of (a), such as a groove formed across the ridge, or a hole formed as shown in FIG. Should be.
[0066]
Then, as shown in FIG. 11 (c), the unvulcanized rubber composition 53 ′ for the outer pipe 51, the inner pipe 52 and the rubber molded body 53 is set in a molding die and heated and pressurized for a predetermined time. Is vulcanized and molded. At this time, the unvulcanized rubber composition 53 ′ is formed into the rubber molded body 53 by vulcanization, and the outer pipe 51 and the rubber molded body 53 are vulcanized and bonded to the inner pipe 52 and the rubber molded body 53. .
[0067]
According to the manufacturing method of the vibration-proof molded body 50 described above, the stopper member 43a is applied to the covering member 58 that covers the non-bonding portion 56 and prevents the stopper portion 43a from adhering to the inner peripheral surface of the outer pipe 41. A function of preventing the generation of sound at the time of contact will be added.
[0068]
Further, conventionally, a sound generation preventing member having surface unevenness is formed by rubber at the time of vulcanization molding, and the surface unevenness of the sound generation preventing member is the same as shown in FIG. The protrusions extending in the axial direction of the covering member 58 are limited to those formed at intervals. However, if the protrusions are formed as described above, various forms of surface irregularities of the covering member 58 can be applied. Thereby, it is possible to effectively prevent the generation of sound.
[0069]
Other operations and effects are the same as those of the fourth embodiment.
[0070]
(Other embodiments)
In the first to fifth embodiments, the covering members 18, 28, 38, 48, and 58 are made of resin. However, the present invention is not particularly limited thereto, and may be made of other materials.
[0071]
In the first to third embodiments, the covering members 18, 28, and 38 are formed by injection molding on the portions that become the non-bonded portions 16, 26, and 36 of the inner pipes 12, 22, and 32. However, the present invention is not limited to this, and a resin tube or the like may be put on a portion to be a non-adhesive portion.
[0072]
Further, in Embodiments 4 and 5, the covering members 48 and 58 are formed by injection molding on the portions to be the non-bonded portions 46 and 56 of the outer pipes 41 and 51. However, the present invention is not particularly limited to this. Alternatively, a pre-molded covering member may be attached to the portions to be the non-adhesive portions 46 and 56.
[0073]
In the second and third embodiments, the convex portions 22a and 32a are provided in the inner pipes 22 and 32 and the concave portions 21a and 31a are provided in the outer pipes 21 and 31, respectively. You may make it provide a part in an outer pipe and a recessed part in an inner pipe, respectively.
[Brief description of the drawings]
FIG. 1A is a perspective view of a vibration-proof molded article of Embodiment 1, and FIG. 1B is a cross-sectional view taken along line IB-IB in FIG.
FIG. 2 is an explanatory view showing a method for manufacturing a vibration-proof molded article according to Embodiment 1.
FIG. 3 is a front view of a vibration-proof molded article according to a second embodiment.
4 is an explanatory view showing a method for manufacturing a vibration-proof molded article according to Embodiment 2 along the IV-IV cross section in FIG. 3; FIG.
5 is a front view of a vibration-proof molded article according to Embodiment 3. FIG.
6 is an explanatory view showing a method for manufacturing a vibration-proof molded article according to Embodiment 2 along the VI-VI cross section in FIG. 5; FIG.
7A is a perspective view of an inner pipe when a fitting recess is formed, and FIG. 7B is a partial cross-sectional view of the inner pipe.
FIG. 8 is a front view of a vibration-proof molded article according to a fourth embodiment.
FIG. 9 is an explanatory view showing a method for manufacturing a vibration-proof molded article according to Embodiment 4.
10 is a front view of a vibration-proof molded article according to Embodiment 5. FIG.
FIG. 11 is an explanatory view showing a method for manufacturing a vibration-proof molded article according to Embodiment 5.
FIG. 12 is a perspective view of a covering member.
FIG. 13 is an explanatory view showing a conventional method for producing a vibration-proof molded article.
FIG. 14 is a graph showing the relationship between the spring characteristic in the axial direction and the spring characteristic in the axial direction of the vibration-proof molded article.
FIG. 15 is a front view of another conventional vibration-proof molded article.
FIG. 16 is a graph showing the relationship between the amount of displacement of the inner pipe and the load.
[Explanation of symbols]
10, 20, 30, 40, 50, 60, 70 Anti-vibration molded body
11, 21, 31, 41, 51, 61, 71 Outer pipe
21a, 31a recess
12, 22, 32, 42, 52, 62, 72 Inner pipe
22a, 32a Convex part
13, 23, 33, 43, 53, 63, 73 Rubber molded body
43a, 53a, 73a Stopper part
13 ', 23', 33 ', 43'. 53 'Unvulcanized rubber composition
14, 24, 34, 44, 54, 64 Vulcanized adhesive (outer pipe side)
15, 25, 35, 65 Bonding part
16, 26, 36, 46, 56, 66, 76 Non-adhesive part
17, 27, 37, 47, 57, 67 Vulcanized adhesive (inner pipe side)
18, 28, 38, 48, 58 Cover member

Claims (4)

An outer pipe, an inner pipe provided in the outer pipe with the same axial direction, and a rubber molded body interposed therebetween, and at least one of the outer pipe and the inner pipe The rubber molded body is a method for producing an anti-vibration molded body in which a bonded portion bonded via a vulcanized adhesive and a non-bonded portion are in contact with each other,
After attaching the vulcanized adhesive to the part of the outer pipe and / or inner pipe that will be bonded, the outer pipe and / or the inner pipe of the non-bonded part cannot be removed. And a rubber molded body is not bonded to the covering member, and an integral body of the outer pipe and / or inner pipe and the rubber molded body is molded by vulcanization adhesion. Manufacturing method of a molded object. In the manufacturing method of the vibration-proof molded object described in Claim 1 ,
The vibration-proof molded body is provided with a convex portion on the non-adhered portion of the outer pipe and the inner pipe having the non-adhered portion, and on the other side, a concave portion into which the convex portion is fitted via the rubber molded body. Provided, and the torsional rigidity is enhanced by fitting the convex portion and the concave portion, and the convex portion is integrally formed on a covering member that covers the portion to be the non-adhesive portion. A method of manufacturing a vibration-proof molded article. An outer pipe, an inner pipe provided in the outer pipe with the same axial direction, and an inner pipe interposed between the outer pipe and the inner pipe so as to contact the inner peripheral surface of the outer pipe in a predetermined axial direction. A rubber molded body on which a stopper part that regulates a displacement above a certain level is formed, and the outer pipe and the rubber molded body are bonded together via a vulcanized adhesive. ,
After the vulcanized adhesive is adhered to the inner peripheral surface of the outer pipe, the portion that becomes the non-adhesive portion that contacts the stopper portion of the rubber molded body on the inner peripheral surface is covered with a covering member so as not to be removable. A method for producing a vibration-proof molded article comprising molding an integral body of the outer pipe and the rubber molded article by vulcanization adhesion without adhering the rubber molded article. In the manufacturing method of the vibration-proof molded object described in Claim 3 ,
A method for producing an anti-vibration molded body, wherein the covering member is formed with surface irregularities that prevent generation of sound when the stopper portion of the rubber molded body abuts.

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