JP2007204002A - Manufacturing method of stabilizer bushing and stabilizer bushing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a liner fastened to the bearing hole inner peripheral surface in a rubber elastic body from being thicker and from wrinkling locally. <P>SOLUTION: In pouring process for pouring a rubber composition 84 in a molten state from a pouring path 72 of a mold 60, the rubber composition 84 flowing along the outer peripheral side of an insert pin 76 affects the shearing load along the circumference with respect to the liner 42 wound at the outer peripheral side of the insert pin by the viscosity. A recessed groove 44 to be transcribed is formed at the inner peripheral surface of the liner 42. A transcribing projection 80 of the insert pin 76 is left cut into the groove 44 to be transcribed. Thereby, the groove 44 to be transcribed and the transcribing projection 80 act a greater resistance force (moving resistance) upon the liner 42 receiving the shearing load, then the liner 42 can be prevented from wrinkling as well as the liner 42 having a mesh structure can be prevented from being not uniform in mesh density. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a stabilizer bush for elastically connecting a stabilizer bar in a vehicle to a vehicle body side, and a stabilizer bush manufactured using the method.

  For vehicles such as automobiles, there is a stabilizer as a stabilization device that uses the torsional rigidity of a stabilizer bar made of spring steel bars to suppress the roll of the vehicle body and improve the ride comfort and handling stability of the occupant. Some are equipped. The stabilizer bar has a torsion portion extending in the left-right direction of the vehicle and a pair of arm portions extending from both ends thereof in the front-rear direction of the vehicle, and the torsion portion elastically moves toward the vehicle body side via a stabilizer bush as a vibration-proof mount. It is connected. Further, the tip ends of the pair of arms in the stabilizer bar are connected to the wheel side via suspension arms or the like.

  The stabilizer bush includes a cylindrical rubber elastic body in which a bearing hole penetrating in the axial direction is formed, and a bracket attached to the outer peripheral side of the rubber elastic body. The rubber elastic body is provided on the outer peripheral side of the torsion portion. Inserted. At this time, the rubber elastic body presses the inner peripheral surface of the bearing hole to the outer peripheral surface of the torsion part, elastically restricts the displacement of the torsion part in the direction perpendicular to the axis and allows torsional deformation of the torsion part. . In such a stabilizer bush, it is desirable to make the bearing hole inner peripheral surface of the rubber elastic body have a low friction with respect to the stabilizer bar, so that it is possible to suppress the generation of abnormal noise due to slippage of the stabilizer bar with respect to the stabilizer bush.

  For example, in the stabilizer bush described in Patent Document 1, a liner formed in a cylindrical shape with a canvas or a Teflon (registered trademark) cloth is fixed to an inner peripheral surface of a bearing hole in a rubber elastic body, and the stabilizer is interposed via the liner. By bringing the inner peripheral surface of the bearing hole into pressure contact with the outer peripheral surface of the bush, the friction of the rubber elastic body with respect to the stabilizer bar is reduced, and abnormal noise (friction noise) is prevented from being generated when the stabilizer bar is torsionally deformed.

  Further, in Patent Document 1, a cylindrical core canvas (liner) disposed in the interior (cavity) of a vulcanization mold is wound, and at this time, an adhesive is applied to the outer peripheral surface of the liner, A method for producing a rubber elastic body in which a liner is fixed to an inner peripheral surface of a bearing hole by injecting a molten rubber composition and vulcanizing and molding the rubber composition to form a rubber elastic body (stabilizer) Bush manufacturing method).

  However, when the liner is fixed to the inner peripheral surface of the bearing hole while molding (vulcanization molding) the rubber elastic body by the method described in Patent Document 1, wrinkles along a predetermined direction are generated on the liner. May arise. Specifically, when the molten rubber composition flows along the outer peripheral surface of the liner wound around the outer peripheral side of the insert pin inside the mold, the load along the shear direction (shearing) is caused by the viscosity of the rubber composition. Load) acts on the liner from the rubber composition. As a result, wrinkles that extend in a direction substantially orthogonal to the flow direction of the rubber composition are generated in the liner that has received a shear load from the rubber composition.

In addition, when a liner made of a woven fabric in which fibers such as nylon and Teflon (registered trademark) are subjected to a shearing load as described above, the stitches of the liner are arranged upstream in the flow direction of the rubber composition. As a result, the stitch density becomes coarse and the stitch density becomes coarse.On the downstream side in the flow direction of the rubber composition, contrary to the upstream side, the stitches of the liner are crushed and the stitch density becomes dense. It becomes thicker and more prone to wrinkles than the roughened part. When such wrinkles and uneven thickness occur in the liner, when the stabilizer bar is twisted to a specific phase range, the frictional resistance between the liner and the stabilizer bar becomes excessive, and a friction noise is likely to be generated.
JP-A-2001-221284

  The first object of the present invention is to manufacture a stabilizer bushing that can effectively prevent local thickening and wrinkle generation of a liner fixed to the inner peripheral surface of a bearing hole in a rubber elastic body in consideration of the above facts. It is to provide a method.

  A second object of the present invention is to provide a stabilizer that can effectively prevent frictional noise from being generated between the liner and the stabilizer bar due to the local thickening of the liner and the influence of wrinkles in consideration of the above facts. To provide a bush.

  According to a first aspect of the present invention, there is provided a stabilizer bushing manufacturing method comprising: a cylindrical rubber elastic body that is fitted on an outer peripheral side of a stabilizer bar in a vehicle and connected to a vehicle body side of the vehicle via a bracket; A stabilizer bush having a cloth-like liner fixed to an inner peripheral surface of a bearing hole penetrating the body and pressed against an outer peripheral surface of a stabilizer bar inserted through the bearing hole, wherein the liner is attached to the bearing The insert pin having a shape corresponding to the inner peripheral surface of the hole is wound around the outer peripheral side, and a convex or concave transfer portion formed on the outer peripheral surface of the insert pin is brought into pressure contact with the inner peripheral surface of the liner to transfer the transfer pin. A winding / transfer process for transferring the shape of the portion to the inner peripheral surface of the liner, and a cavity corresponding to the surface shape of the rubber elastic body is provided inside the cavity. An injection step of injecting a molten rubber composition into a mold in which an insert pin around which the liner is wound is disposed at an insert position corresponding to the bearing hole, and a molten rubber composition inside the mold. Forming the rubber elastic body by solidifying, and fixing the liner to the inner peripheral surface of the bearing hole formed by an insert pin in which the liner is wound around the rubber elastic body. Features.

  In the stabilizer bush manufacturing method according to the first aspect, first, in the winding / transfer process, the cloth-shaped liner is wound around the outer peripheral side of the insert pin, and the convex shape formed on the outer peripheral surface of the insert pin or By pressing the concave transfer portion against the inner peripheral surface of the liner and transferring the shape of the transfer portion to the inner peripheral surface of the liner, the shape of the transfer portion is transferred (reverse transfer) to the inner peripheral surface of the liner. A concave or convex transferred portion is formed. The formation (transfer) of the transferred portion varies depending on conditions such as the mechanical properties of the liner, temperature, pressure contact force, and the like, and the formation time from the start of transfer to the completion of transfer changes. The formation of the transferred portion may continue until after the start of composition injection.

  Next, in the injection step, the molten rubber composition is injected into the interior (cavity) of the mold in which the insert pin with the liner wound around the insert position corresponding to the bearing hole in the cavity is placed. The rubber composition fills the cavity while flowing along the outer peripheral side of the insert pin and the inner wall surface of the cavity.

  At this time, the rubber composition flowing on the outer peripheral side of the insert pin around which the liner is wound causes a load (shear load) along the shear direction to act on the liner wound on the outer peripheral side of the insert pin due to its viscosity. However, a concave or convex transferred portion is formed on the inner peripheral surface of the liner, and the transferred portion of the insert pin remains in the transferred portion. Since the transfer portion applies a large resistance force (movement resistance) to the liner receiving a shear load, the liner is displaced with respect to the outer peripheral surface of the insert pin due to the shear load from the rubber composition, and the liner is wrinkled. When the liner has a woven fabric structure, the stitch density of the liner changes along the flow direction of the rubber composition inside the mold. Theft can be prevented.

  A stabilizer bush manufacturing method according to claim 2 of the present invention is the stabilizer bush manufacturing method according to claim 1, wherein the liner is injected into the mold as the insert pin and wound around the insert pin. What has the transfer part extended in the direction which cross | intersects the flow direction of the molten rubber composition which flows along an outer peripheral surface is used, It is characterized by the above-mentioned.

  A stabilizer bush manufacturing method according to claim 3 of the present invention is the stabilizer bush manufacturing method according to claim 2, wherein the insert pin is injected into the interior of a mold and wound around the insert pin. What has the transfer part extended in the direction substantially orthogonal to the flow direction of the molten rubber composition which flows along an outer peripheral surface is used, It is characterized by the above-mentioned.

  A stabilizer bush manufacturing method according to claim 4 of the present invention is the stabilizer bush manufacturing method according to any one of claims 1 to 3, wherein the transfer portion is elongated in the axial direction on the outer peripheral surface as an insert pin. In addition, an injection port that opens to the outer peripheral side of the insert pin on the inner wall surface of the mold is formed, and a liner is wound around the molten rubber composition injected into the mold through the injection port. The outer peripheral side of the insert pin is caused to flow along the circumferential direction.

  A stabilizer bush manufacturing method according to claim 5 of the present invention is the stabilizer bush manufacturing method according to any one of claims 1 to 4, wherein the tetratetrafluoroethylene fiber and polyamide fiber are used as the liner. A woven fabric formed by braiding at least one is used.

  Moreover, the stabilizer bush which concerns on Claim 6 of this invention is a stabilizer bush manufactured using the manufacturing method of the stabilizer bush in any one of Claims 1 thru | or 5, Comprising: On the inner peripheral surface of the said liner, A plurality of transferred grooves extending along either the axial direction or the circumferential direction are formed.

  In the stabilizer bush according to the sixth aspect, it is possible to prevent the liner from being displaced with respect to the outer peripheral surface of the insert pin due to the shear load from the rubber composition, and to generate wrinkles on the liner, and the liner has a woven fabric structure. In this case, since the stitch density of the liner can be prevented from changing along the flow direction of the rubber composition inside the mold, the stabilizer bar is not affected by the twist amount (phase), and the liner and the stabilizer bar The frictional resistance of the stabilizer bar can be kept low, and the change in the frictional resistance accompanying the change in the phase of the stabilizer bar can be made sufficiently small.

  As described above, according to the method for manufacturing a stabilizer bush of the present invention, it is possible to effectively prevent local thickening of the liner fixed to the inner peripheral surface of the bearing hole in the rubber elastic body and generation of wrinkles.

  Moreover, according to the manufacturing method of the stabilizer bush of this invention, it can prevent effectively that a frictional noise generate | occur | produces between a liner and a stabilizer bar by the influence of the local thickness in a liner, and a wrinkle.

  Hereinafter, a stabilizer bush and a manufacturing method thereof according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a stabilizer bush according to an embodiment of the present invention. The stabilizer bush 10 connects a stabilizer bar 50 (see FIG. 1B) provided in a suspension device of an automobile to a vehicle body 52. In addition, in the figure, the code | symbol S has shown the axial center of the stabilizer bush 10, and the following description is given by making the direction along this axial center into an axial direction.

  The stabilizer bush 10 includes a rubber elastic body 12 formed in a cylindrical shape from a rubber material, and a bracket 14 having a substantially U-shaped curved cross section that is attached to the outer peripheral side of the rubber elastic body 12. The rubber elastic body 12 is formed with a semi-cylindrical portion 16 having a substantially semicircular cross-sectional shape on the top side, and a substantially rectangular cross-sectional shape on the bottom end side of the semi-cylindrical portion 16. The rectangular parallelepiped portion 18 is integrally formed. Here, the outer peripheral surface of the semi-cylindrical portion 16 is formed by a curved surface that is curved with a substantially constant radius of curvature about the axis S. The rubber elastic body 12 is provided with a bearing hole 20 penetrating between both end faces in the axial direction, and the cross-sectional shape of the bearing hole 20 is a circle centered on the axis S. As shown in FIG. 1A, a liner 42 formed in a cylindrical shape is bonded to the stabilizer bush 10 on the inner peripheral surface of the bearing hole 20.

  The liner 42 is composed of a woven fabric knitted with warp yarn and weft yarn of polytetrafluoroethylene fiber (nylon (registered trademark)) and polyamide fiber (teflon (registered trademark)), respectively. It has lubricity (self-lubricating property). The liner 42 has a plurality (four in this embodiment) of transferred grooves 44 each having a substantially semicircular cross section extending in the axial direction on the inner peripheral surface thereof. These transferred grooves 44 are arranged at an equal pitch (90 ° pitch) along the circumferential direction.

  Further, a slit 22 is formed in the rubber elastic body 12 along the radial direction centering on the axis S between the inner peripheral surface of the bearing hole 20 and the outer peripheral surface of the semi-cylindrical portion 16. Is separating the vicinity of one end along the circumferential direction of the semi-cylindrical portion 16 from the rectangular parallelepiped portion 18. When the rubber elastic body 12 is inserted into the outer peripheral side of the stabilizer bar 50, the slit 22 of the rubber elastic body 12 is pushed and widened, whereby the rubber elastic body 12 is predetermined on the outer peripheral side of the stabilizer bar 50 in which the bent portion is formed. The operation | work which inserts in the site | part (torsion part) of becomes easy.

  The rubber elastic body 12 is formed with flange portions 24 that extend to the outer peripheral side at both axial ends of the outer peripheral surfaces of the semi-cylindrical portion 16 and the rectangular parallelepiped portion 18. The bracket 14 is formed with an outer fitting portion 28 that is curved in a substantially U shape, and extends outward from both ends of the outer fitting portion 28 along the width direction (arrow W direction) of the rectangular parallelepiped portion 18. Leg portions 30 are formed.

  The bracket 14 has an outer fitting portion 28 attached to the outer peripheral side of the semi-cylindrical portion 16 and the rectangular parallelepiped portion 18 in the rubber elastic body 12, and a pair of flange portions 24 are fastened and fixed to the vehicle body 52 by bolts 32 and nuts 34, respectively. The At this time, the rubber elastic body 12 is held in a state where the semi-cylindrical portion 16 and the rectangular parallelepiped portion 18 are compressed toward the axis S side by the vehicle body 52 and the external fitting portion 28. As a result, the slit 22 of the rubber elastic body 12 is maintained in a completely closed state, and the inner peripheral surface of the bearing hole 20 is reliably pressed against the outer peripheral surface of the stabilizer bar 50.

  Next, a method for manufacturing the rubber elastic body 12 configured as described above will be described.

  The rubber elastic body 12 is manufactured by using a mold 60 for vulcanization molding as shown in FIG. The mold 60 is provided with a thick plate-like base mold 62 on the lower end side, and an open / close mold 64 that is detachably mounted on the upper surface side of the base mold 62. The open / close mold 64 is provided with a peripheral wall portion 66 that is curved in a substantially U-shape, and a pair of side wall portions 68 that respectively close both ends of the peripheral wall portion 66. The open / close mold 64 has a substantially U-shaped space opened downward.

  The open / close mold 64 is provided with a pouring passage 72 penetrating in the vertical direction at one end in the axial direction at the top. A pouring nozzle 82 of an injection device (not shown) is connected to an outer end of the pouring passage 72, and a molten rubber composition 84 injected from the pouring nozzle 82 is supplied. The mold 60 also includes a round bar-like insert pin 76 corresponding to the bearing hole 20 of the rubber elastic body 12, and the pair of side wall portions 68 are respectively provided with insertion holes 78 through which the insert pins 76 are inserted coaxially. It is installed.

  In the mold 60, the insert pins 76 are inserted through the insertion holes 78 of the pair of side wall portions 68, so that the insert pins 76 are supported at predetermined insert positions in the cavity 70 by the pair of side wall portions 68. This insert position coincides with the bearing hole 20 in the rubber elastic body 12 molded (vulcanized) in the mold 60. A plurality of (four in this embodiment) transfer protrusions 80 are formed on the outer peripheral surface of the insert pin 76 in the axial direction. These transfer protrusions 80 each have a substantially rectangular cross section, and are arranged at an equal pitch (90 ° pitch) along the circumferential direction.

  When the rubber elastic body 12 is manufactured using the mold 60 as described above, first, the cylindrical liner 42 is inserted into the outer peripheral side of the insert pin 76 and wound. Here, the inner diameter of the liner 42 before winding is smaller than the outer diameter of the insert pin 76. By inserting the liner 42 into the outer peripheral side of the insert pin 76, the liner 42 is inserted in the circumferential direction. Along the tension, the liner 42 presses against the outer peripheral surface of the insert pin 76. As a result, a plurality of transfer protrusions 80 formed on the outer peripheral surface of the insert pin 76 are respectively transferred to the inner peripheral surface of the liner 42, and a plurality of transferred grooves 44 are formed on the inner peripheral surface of the liner 42. It is formed at equal intervals. A heat-reactive adhesive is applied to the outer peripheral surface of the liner 42 in advance. Even if no adhesive is applied to the outer peripheral surface of the liner 42, depending on the material of the liner 42, the mesh density, etc., the rubber elastic body 12 is in a welded state with the liner 42 when the rubber composition is solidified. Can be fixed to the inner peripheral surface of the rubber elastic body 12.

  The insert pin 76 around which the liner 42 is wound is inserted from the outside into the open / close mold 64 through one insertion hole 78 and protrudes from the open / close mold 64 to the outside through the other insertion hole 78. The opening / closing die 64 through which the insert pin 76 is inserted is mounted by being placed on the upper surface side of the base die 62, whereby a cavity 70, which is a space partitioned from the outside, is formed inside the mold 60. .

  Next, the pouring nozzle 82 of the injection molding machine is connected to the outer end portion of the pouring passage 72, and the molten rubber composition 84 is injected into the mold 60 through the pouring passage 72 at a predetermined injection speed. The At this time, the rubber composition 84 gradually fills the cavity 70 while flowing between the inner wall surface of the cavity 70 and the outer peripheral surface of the insert pin 76. At this time, the air existing in the cavity 70 is discharged to the outside from between the inner peripheral surface of the insertion hole 78 of the mold 60 and the outer peripheral surface of the insert pin 76 through the liner 42 having air permeability. Further, most of the rubber composition 84 that flows on the outer peripheral side of the insert pin 76 flows on the outer peripheral side of the insert pin 76 along the circumferential direction centering on the axis S (the direction of arrow C in FIG. 2A). Further, even the rubber composition 84 that does not flow along the direction parallel to the circumferential direction flows along the direction having the velocity component (vector) along the circumferential direction.

  When the melted rubber composition 84 is filled in the cavity 70 without any gap, the pouring nozzle 82 is closed and the injection of the rubber composition 84 into the mold 60 is terminated. Thereafter, the rubber composition 84 inside the mold 60 is cooled and solidified under predetermined cooling conditions, whereby the rubber elastic body 12 having the bearing holes 20 is molded (vulcanized molding) inside the mold 60. At the same time, the liner 42 is bonded and fixed to the inner peripheral surface of the bearing hole 20. After the molding is completed, the opening / closing mold 64 is detached from the base mold 62, the insert pin 76 is pulled out from the opening / closing mold 64 and the rubber elastic body 12, and the rubber elastic body 12 is pushed out of the opening / closing mold 64, thereby Manufacturing is complete.

  According to the manufacturing method of the stabilizer bush 10 according to the present embodiment configured as described above, the liner 42 is wound in the injection step of injecting the molten rubber composition 84 from the pouring path 72 of the mold 60. The rubber composition 84 flowing on the outer peripheral side of the insert pin 76 causes a load (shear load) along the circumferential direction to act on the liner 42 wound around the outer peripheral side of the insert pin due to its viscosity. A concave transfer groove 44 is formed on the inner peripheral surface, and the transfer protrusion 80 of the insert pin 76 remains in the transfer groove 44, so that the transfer groove 44 and Since the transfer protrusion 80 causes a large resistance force (movement resistance) to act on the liner 42 receiving the shear load, the liner is caused by the shear load from the rubber composition 84. 2 can be prevented from being displaced with respect to the outer peripheral surface of the insert pin 76 to cause wrinkles in the liner 42, and the stitch density of the liner 42 which is a woven fabric structure is in the flow direction of the rubber composition 84 in the mold 60. Accordingly, it is possible to prevent the liner 42 from becoming uneven by becoming rough on the upstream side and becoming dense on the downstream side.

  In the mold 60 shown in FIG. 2 described above, the molten rubber composition 84 supplied from the pouring channel 72 flows into the cavity 70 as a liquid flow flowing along the radial direction. 3, when the pouring channel 92 is formed so as to penetrate the one side wall 68 in the axial direction as in the mold 90 shown in FIG. 3, the molten state supplied from the pouring channel 92 is in a molten state. The rubber composition 84 flows into the cavity 70 as a liquid flow that flows along the axial direction.

  In the above case, a plurality of (four in this embodiment) transfer protrusions 96 extending in the circumferential direction are formed on the outer peripheral surface of the insert pin 76, and the transfer protrusions 96 form the inner peripheral surface of the liner 42. If a transfer groove 98 extending in the circumferential direction is formed by the transfer protrusion 96, the liner 42 is wrinkled and stitched by a load (shear load) from the rubber composition 84 that flows along the axial direction on the outer peripheral side of the insert pin 76. It is possible to effectively prevent the density non-uniformity from occurring.

  However, in the mold 90 shown in FIG. 3, the rubber composition 84 that flows on the outer peripheral side of the insert pin 76 has a speed component along the circumferential direction in addition to the speed component along the axial direction. Depending on the injection condition of the rubber composition into the cavity 70 through 92 and the shape of the cavity 70, the speed component along the circumferential direction of the rubber composition 84 flowing on the outer peripheral side of the insert pin 76 may be the speed component along the axial direction. May increase. In such a case, if the transfer protrusion 80 extending in the axial direction as shown in FIG. 2 is formed on the insert pin 76, unevenness of wrinkles and mesh density (thickness) with respect to the liner 42 is prevented. It is effective for this purpose.

  Further, in order to suppress the generation of a speed component along the circumferential direction of the rubber composition 84 in the cavity 70, it is advantageous to provide the mold 100 with a pouring channel 102 as shown in FIG. The pouring channel 102 is provided with an elongated round hole-shaped supply portion 104 extending from the upper end of one side wall portion 68 of the mold 100 to the inner peripheral side, and discharged to the outer peripheral side of the insert pin 76 in the side wall portion 68. A portion 106 is provided. The discharge part 106 is coaxially arranged on the inner side in the axial direction of the insertion hole 78 in the side wall part 68, and is formed as a round hole having a larger diameter than the insertion hole 78. The pouring channel 102 includes a discharge unit 106 and a supply unit 104 connected to the upper end of the discharge unit 106.

  The discharge portion 106 penetrates from the opening end inside the insertion hole 78 to the inner wall surface facing into the cavity 70 in the side wall portion 68, and has an annular shape that opens into the cavity 70 on the outer peripheral side of the insert pin 76. A discharge port 108 is formed. Thus, when the molten rubber composition 84 is supplied from the nozzle 82 to the pouring channel 102, the rubber composition 84 passes through the supply unit 104 and the discharge unit 106 and enters the cavity 70 from the discharge port 108. Discharged. At this time, most of the molten rubber composition 84 is discharged into the cavity 70 as a laminar flow that flows in the axial direction along the outer peripheral surface of the insert pin 76.

  Accordingly, when the stabilizer bush 10 is manufactured using the mold 100 provided with the pouring passage 102 as shown in FIG. 4, the molten rubber composition 84 is injected from the pouring passage 102 of the mold 60. In the injection step, the rubber composition 84 that flows on the outer peripheral side of the insert pin 76 around which the liner 42 is wound has a load (shear) along the axial direction with respect to the liner 42 wound around the outer peripheral side of the insert pin due to its viscosity. Load) is applied mainly and shear load along the circumferential direction is hardly applied. Therefore, the transfer projection 96 of the insert pin 76 extending in the circumferential direction and the coating formed on the inner peripheral surface of the liner 42 by the transfer projection 96 are provided. It is possible to particularly effectively prevent the transfer groove 98 from causing wrinkles on the liner 42 and non-uniform thickness of the liner 42.

It is the front view and side sectional view showing the composition of the stabilizer bush concerning the embodiment of the present invention. It is the front sectional view and side sectional view of a mold used for the manufacturing method of the stabilizer bush concerning the embodiment of the present invention, and shows the case where the transfer projection extended in the direction of an axis is formed in the insert pin. It is the front sectional view and side sectional view of a mold used for the manufacturing method of the stabilizer bush concerning the embodiment of the present invention, and shows the case where the transfer projection extended in the peripheral direction is formed in the insert pin. It is the side sectional view and front sectional view of a mold used for the manufacturing method of the stabilizer bush concerning the embodiment of the present invention, and shows the case where the pouring passage which has an annular discharge mouth is provided in the mold.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Stabilizer bush 12 Rubber elastic body 14 Bracket 20 Bearing hole 36 Grease groove 38 Grease 42 Liner 44 Transfer groove 50 Stabilizer bar 60 Mold 62 Base type (mold)
64 Open / close type (mold)
76 Insert pin 80 Transfer protrusion (transfer part)
84 Rubber composition 90 Mold 96 Transfer protrusion (transfer part)
98 Transferred groove 100 Mold 102 Pouring channel 108 Discharge port

Claims (6)

A cylindrical rubber elastic body that is fitted on the outer peripheral side of the stabilizer bar in the vehicle and connected to the vehicle body side of the vehicle via a bracket, and is fixed to the inner peripheral surface of the bearing hole that penetrates the rubber elastic body, A cloth-like liner that press-contacts the outer peripheral surface of the stabilizer bar that is inserted through the bearing hole,
The liner is wound around the outer peripheral side of an insert pin having a shape corresponding to the inner peripheral surface of the bearing hole, and a convex or concave transfer portion formed on the outer peripheral surface of the insert pin is pressed against the inner peripheral surface of the liner. A winding / transfer process for transferring the shape of the transfer portion to the inner peripheral surface of the liner;
A molten rubber composition in a mold in which a cavity corresponding to the surface shape of the rubber elastic body is provided, and an insert pin around which the liner is wound is disposed at an insert position corresponding to the bearing hole in the cavity An injection process for injecting objects;
The rubber elastic body is molded by solidifying a molten rubber composition inside the mold, and the liner is formed on the inner peripheral surface of the bearing hole formed by an insert pin in which the liner is wound around the rubber elastic body. A molding process for fixing
The manufacturing method of the stabilizer bush characterized by having.   As the insert pin, a transfer that is elongated in a direction intersecting the flow direction of the molten rubber composition that is injected into the mold and flows along the outer peripheral surface of the liner wound around the insert pin. 2. The method for manufacturing a stabilizer bush according to claim 1, wherein a part having a portion is used.   As the insert pin, it is elongated in a direction substantially perpendicular to the flow direction of the molten rubber composition that is injected into the mold and flows along the outer peripheral surface of the liner wound around the insert pin. 3. The method for manufacturing a stabilizer bush according to claim 2, wherein a transfer bushing is used. While using an insert pin that is elongated in the axial direction on the outer circumferential surface,
An injection port that opens to the outer peripheral side of the insert pin on the inner wall surface of the mold is formed, and the molten rubber composition injected into the mold through the injection port is disposed on the outer peripheral side of the insert pin around which the liner is wound. The method for manufacturing a stabilizer bush according to any one of claims 1 to 3, wherein the stabilizer bush is made to flow along a circumferential direction.   The method for manufacturing a stabilizer bush according to any one of claims 1 to 4, wherein a woven fabric formed by weaving at least one of a polytetrafluoroethylene fiber and a polyamide fiber is used as the liner. A stabilizer bush manufactured using the method for manufacturing a stabilizer bush according to any one of claims 1 to 5,
A stabilizer bush, wherein a plurality of transferred grooves extending along one of an axial direction and a circumferential direction are formed on an inner peripheral surface of the liner.

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