JP2009083253A - Method and device of applying mold release liquid to bladder for tire vulcanization - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device of applying a mold release liquid to a bladder for tire vulcanization capable of shortening an applying time by causing no problem of scattering of the mold release liquid. <P>SOLUTION: The method of applying the mold release liquid to the bladder for the tire vulcanization comprises the step for attaching the mold release liquid on the inner surface 1a of a cylindrical transfer mold 1, the step for inserting the bladder 8 for tire vulcanization into the transfer mold 1, and the step for transferring the mold release liquid where the inserted bladder 8 for the tire vulcanization is inflated to attach to the inner surface 1a of the transfer mold 1 onto the outer surface 8a of the bladder 8 for the tire vulcanization. The applying device has the cylindrical transfer mold 1 for transferring the mold release liquid on the outer surface 8a of the bladder 8 for the tire vulcanization, an attaching means 3 for attaching the mold release liquid on the inner surface 1a of the transfer mold 1, and a moving means 4 for moving the transfer mold 1 to the bladder 8 for the tire vulcanization of a tire vulcanizer. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method and an apparatus for applying a mold release liquid to a tire vulcanization bladder, and more specifically, a tire capable of shortening the application time of the mold release liquid without causing a problem of the release liquid scattering. The present invention relates to a release liquid coating method and apparatus for a vulcanization bladder.

  In the tire vulcanization process, a mold release liquid is applied to the contact surface between the bladder and the green tire in order to improve the mold releasability between the vulcanized tire and the bladder. As a method of applying the release liquid, it is generally performed to apply to the tire inner surface by spraying. However, this spray coating causes a problem of surrounding dirt as a result of the release liquid splashing into the atmosphere, and the amount of release liquid used is increased by the amount of splashing, and improvement is also required in terms of cost. It was done.

Therefore, conventionally, as a countermeasure, there has been proposed a method and an apparatus in which a release liquid is applied to the outer surface of the bladder with a brush (see, for example, Patent Document 1). There is an advantage that scattering of the release liquid can be effectively prevented by applying the release liquid with a brush instead of spray application. However, it takes time to uniformly apply the release liquid to the outer surface of the bladder, leaving room for improvement.
JP 2004-306273 A

  A first object of the present invention is to provide a method and an apparatus for applying a release liquid to a tire vulcanization bladder that can reduce the application time without causing the problem of splashing of the release liquid. .

  A second object of the present invention is to provide a method and apparatus for applying a mold release liquid to a tire vulcanization bladder capable of uniformly applying the mold release liquid.

  According to the first aspect of the present invention, there is provided a method of applying a release liquid to a tire vulcanization bladder, the step of attaching a release liquid to the inner surface of a cylindrical transfer mold, and the tire vulcanization in the transfer mold. And a step of transferring the tire vulcanization bladder to the outer surface of the expanded tire vulcanization bladder by inflating the mold release liquid adhering to the inner surface of the transfer mold. And

  The method for applying the mold release liquid to the tire vulcanization bladder according to the second aspect of the present invention is the method for applying the mold release liquid to the tire vulcanization bladder according to the first aspect, wherein the transferring step is as follows. The transfer mold and / or the tire vulcanization bladder is transferred while heating.

  The method for applying a mold release liquid to the tire vulcanization bladder according to the third aspect of the present invention is the method for applying the mold release liquid to the tire vulcanization bladder according to the first or second aspect, wherein the transfer mold is used. Is characterized in that vent holes penetrating from the inner surface to the outer surface of the transfer mold are arranged at predetermined intervals.

  The method for applying a mold release liquid to the tire vulcanization bladder according to the invention described in claim 4 of the present application is the method for applying the mold release liquid to the tire vulcanization bladder according to claim 1, 2 or 3, wherein The transfer mold has a grid-like groove or protrusion on the inner surface.

  A release liquid coating apparatus for a tire vulcanization bladder according to claim 5 of the present application includes a cylindrical transfer mold for transferring a release liquid onto the outer surface of a tire vulcanization bladder, An attaching means for attaching a release liquid to the inner surface of the transfer mold and a moving means for moving the transfer mold to a tire vulcanizing bladder of a tire vulcanizer are provided.

  According to a sixth aspect of the present invention, there is provided a release liquid coating apparatus for a tire vulcanization bladder, a cylindrical transfer mold for transferring a release liquid onto an outer surface of a tire vulcanization bladder, Attachment means for attaching a release liquid to the inner surface of the transfer mold, holding means for holding the tire vulcanizing bladder, and moving means for moving the tire vulcanization bladder held by the holding means into the transfer mold And an expansion means for expanding the bladder for tire vulcanization in the transfer mold.

  A release liquid coating apparatus for a tire vulcanization bladder according to an invention described in claim 7 of the present application is the release liquid application apparatus for a tire vulcanization bladder according to claim 5 or 6, wherein the transfer mold is used. A heating means for heating the transfer mold and / or the tire vulcanizing bladder is disposed outside the rim.

  The mold release liquid application apparatus to the tire vulcanization bladder according to the invention described in claim 8 of the present application is the mold release liquid application apparatus to the tire vulcanization bladder according to claim 5, 6 or 7, The transfer mold is characterized in that vent holes penetrating from the inner surface to the outer surface of the transfer mold are arranged at a predetermined interval.

  The mold release liquid coating apparatus for the tire vulcanization bladder according to the invention described in claim 9 is the mold release liquid coating apparatus for the tire vulcanization bladder according to any one of claims 5 to 8. The transfer mold has a grid-like groove or protrusion on the inner surface.

  According to the first, fifth, and sixth aspects of the present invention described above, the release liquid is applied to the outer surface of the tire vulcanizing bladder using a transfer mold without using a spray. There is no scattering inside. In addition, since it is only necessary to transfer the mold release liquid adhered to the inner surface of the transfer mold, it becomes possible to apply the mold release liquid in a shorter time than before.

  Further, according to claims 2 and 7 of the present application, the transfer mold and / or the tire vulcanization bladder is heated during the transfer of the release liquid, so that the inner surface of the transfer mold and the outer surface of the tire vulcanization bladder expanded. Therefore, it is possible to improve the variation in the amount of the release liquid applied during transfer onto the outer surface of the tire vulcanization bladder, and to apply the release liquid uniformly.

  According to claims 3 and 8 of the present application, the air between the inner surface of the transfer mold and the outer surface of the inflated tire vulcanizing bladder, and the excess release liquid adhering to the inner surface of the transfer mold, Since it can be pushed out by the tire vulcanization bladder in contact with the inner surface of the transfer mold and discharged from the vent hole, it can be uniformly applied by transferring the release liquid onto the outer surface of the tire vulcanization bladder. By combining with the constructions of claims 2 and 7 of the present application, it is possible to make the coating by the release liquid transfer more uniform.

  According to claims 4 and 9 of the present application, since a predetermined amount of the release liquid can be reliably attached in the lattice-like grooves, the release liquid is dispersed and attached to the inner surface of the transfer mold without being biased. Application by transfer of the mold release liquid can be made uniform, and by combining with the structure of claims 2, 3, 7 and 8 of the present application, application by transfer of the mold release liquid is made even more uniform. Can be done.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  1 and 2 show an example of a coating apparatus used in a method for applying a mold release liquid to a tire vulcanization bladder according to the present invention. This coating apparatus applies a mold release liquid to the outer surface of a tire vulcanization bladder. A cylindrical transfer mold 1 for transferring, a holding means 2 for holding the transfer mold 1, an attaching means 3 for attaching a release liquid to the inner surface 1a of the transfer mold 1, and the transfer mold 1 of a tire vulcanizer. A moving means 4 for moving to a tire vulcanizing bladder and a heating means 5 for heating the transfer mold 1 are provided.

  The cylindrical transfer mold 1 is made of rubber or resin, and the tire vulcanization bladder can be inserted into the transfer mold 1 with a structure that is slightly larger than the tire vulcanization bladder. As shown in FIG. 3, a large number of vent holes 6 penetrating from the inner surface 1a to the outer surface 1b of the transfer die 1 are arranged at predetermined intervals over at least the entire region 1X where the tire vulcanizing bladder contacts. By arranging the vent hole 6 in this manner, air between the inner surface 1a and the outer surface of the inflated tire vulcanizing bladder and excess release liquid adhering to the inner surface 1a are discharged from the vent hole 6 to the outside. It can be discharged. The cylindrical transfer mold 1 referred to here is a barrel-shaped transfer mold in which the outer diameter of the central portion is larger than the upper and lower ends as shown in FIG. 1, or a transfer having the same shape as a raw tire (toroidal shape). Includes a mold and a cylindrical transfer mold having substantially the same diameter.

  As shown in FIG. 2, the holding unit 2 includes a plurality of (four in the drawing) cylinders 2 </ b> A for holding the transfer mold 1. The four cylinders 2A are arranged at 90 ° intervals around the transfer mold 1 in the holding position, and the transfer mold 1 is fixed by a holding pad 2B fixed to the tip of the rod 2a of the cylinder 2A driven by a drive source (not shown). It comes to hold.

  The adhering means 3 includes an application part 3A for applying a release liquid to the transfer mold 1 and a supply part 3B for supplying the release liquid to the application part 3A. The application unit 3A is installed below the holding position of the transfer mold 1, and is provided on a rotating shaft 3A1 that is erected on the base B so as to be freely rotatable, and a support plate 3A2 that is fixed to the upper end of the rotating shaft 3A1. It has a lifting cylinder 3A3. At the upper end of the rod 3A4 extending above the elevating cylinder 3A3 driven by a drive source (not shown), a rotating disk 3A5 is provided for scattering and applying the release liquid using centrifugal force. The rotating disk 3A5 is smaller than the diameter of the opening at the lower end of the transfer mold 1 and can be inserted into the transfer mold 1. The rotary shaft 3A1 is rotationally driven by a motor 3A6 installed on the base B.

  The supply unit 3B includes a supply head unit 3B1 that supplies a release liquid to the rotating disk 3A5, and a support unit 3B2 that supports the supply head unit 3B1. The supply head unit 3B1 is connected to a release liquid supply source (not shown), and supplies the release liquid from the lower supply port x onto the rotating disk 3A5. The support portion 3B2 includes a rotation member 3B3 supported so as to be rotatable about a rotation axis VA extending vertically. An elevating cylinder 3B5 driven by a drive source (not shown) is installed on a support plate 3B4 extending in the horizontal direction from the rotating member 3B3, and a supply head is provided at the lower end of a rod 3B6 extending below the elevating cylinder 3B5. Part 3B1 is fixed.

  The moving means 4 has a plurality of gripping members 4A for gripping a gripping portion 1c formed on the upper end portion of the transfer mold 1, and grips the transfer mold 1 with the gripping members 4A, and adds tires installed in the vulcanization process. It moves to the tire vulcanizer bladder. As the moving means 4, means (vertical loader) for conveying the raw tire to the tire vulcanizer may be used.

  As shown in FIG. 1, the heating means 5 includes a plurality of far infrared heaters 5A. The far-infrared heater 5A is disposed outside the transfer mold 1 at a predetermined interval (two in the figure at an interval of 180 ° in the circumferential direction of the transfer mold 1), and is attached to a support member (not shown) extending from the transfer mold 1. It is supported and movable together with the transfer mold 1.

  Hereinafter, the release liquid application method to the tire vulcanization bladder of the present invention will be described using the above-described coating apparatus.

  First, as shown in FIGS. 1 and 2, the transfer mold 1 is held in the holding position by the holding means 2. In this state, the elevating cylinder 3A3 of the attaching means 3 operates, the rod 3A4 extends upward, and the rotating disk 3A5 is inserted into the lower position in the transfer mold 1. The motor 3A6 operates and the rotating shaft 3A1 rotates at a constant speed, while the release liquid is supplied onto the rotating disk 3A5 from the supply port x of the supply head part 3B1 located near the upper part of the rotating disk 3A5. . The release liquid supplied onto the rotating disk 3A5 is scattered to the outside as indicated by an arrow in FIG. 4 due to the centrifugal force of the rotating rotating disk 3A5 and adheres to the inner surface 1a of the transfer mold 1.

  The rod 3B6 gradually expands and contracts to move the supply head portion 3B1 upward, while the rod 3A4 gradually extends upward to move the rotary disk 3A5 upward, while releasing the entire inner surface 1a of the transfer mold 1 Allow liquid to adhere.

  When the step of attaching the release liquid to the inner surface 1a of the transfer mold 1 is completed, the rod 3A4 expands and contracts to lower the rotating disk 3A5 and retracts downward from the transfer mold 1, while the rod 3B6 further expands and contracts. The supply head unit 3B1 is raised and retracted upward from the transfer mold 1. When the supply head unit 3B1 reaches the upper position of the transfer mold 1, the rotating member 3B3 rotates 180 ° in one direction, and moves the supply head unit 3B1 to a standby position away from the transfer mold 1.

  When the supply head unit 3B1 moves to the standby position, the gripping member 4A of the moving unit 4 descends and grips the upper end of the transfer die 1. When gripping is completed, the rod 2A1 of the cylinder 2A of the holding means 2 moves backward, and the holding of the transfer mold 1 by the holding pad 2B is released. When the release is completed, the transfer means 1 is moved to the tire vulcanizing bladder 8 of the tire vulcanizer TK by the moving means 4, and the tire vulcanizing bladder 8 is inserted into the transfer mold 1 as shown in FIG. State.

  After the insertion, the far infrared heater 5A of the heating means 5 is turned on to heat the transfer mold 1. As a result, the inner surface 1a of the transfer mold 1 and the outer surface 8a of the expanding tire vulcanizing bladder 8 are in smooth contact with each other, facilitating uniform transfer of the mold release liquid.

  Next, as shown in FIG. 6, the tire vulcanization bladder 8 is expanded and brought into contact with the inner surface 1 a of the transfer mold 1, and the release liquid adhering to the inner surface 1 a is transferred to the outer surface 8 a of the tire vulcanization bladder 8. Apply by. At this time, the air between the inner surface 1 a of the transfer mold 1 and the outer surface 8 a of the inflated tire vulcanizing bladder 8 and the excessive mold release liquid adhering to the inner surface 1 a of the transfer mold 1 are transferred to the transfer mold 1. It is pushed out by a tire vulcanizing bladder 8 that is in contact with the inner surface 1a of the tire and is discharged from the vent hole 6 to the outside. The transfer amount of the mold release liquid is adjusted by adjusting the expansion amount of the tire vulcanizing bladder 8.

  According to the above-described present invention, the mold release liquid is applied to the outer surface 8a of the tire vulcanizing bladder 8 using the transfer mold 1 without using a spray, so that the mold release liquid is scattered in the atmosphere. It can be avoided.

  In addition, since it is only necessary to transfer the mold release liquid adhered to the inner surface 1a of the transfer mold 1, the coating time can be shortened and the productivity can be increased.

  Further, by heating the transfer mold 1 by the heating means 5 at the time of transferring the mold release liquid, the inner surface 1a of the transfer mold 1 and the outer surface 8a of the expanded tire vulcanizing bladder 8 are easily brought into contact with each other. Transfer of the mold release liquid to the outer surface 8a of the tire vulcanizing bladder 8 can be made uniform.

  Further, the air between the inner surface 1a of the transfer mold 1 and the outer surface 8a of the inflated tire vulcanizing bladder 8 and the excess release liquid adhering to the inner surface 1a of the transfer mold 1 are removed from the inner surface 1a of the transfer mold 1. Since the tire vulcanization bladder 8 in contact with the tire can be discharged from the vent hole 6 to the outside, the transfer of the mold release liquid to the outer surface 8a of the tire vulcanization bladder 8 can be made more uniform.

  FIG. 7 shows another example of a coating apparatus used in the mold release liquid coating method for the tire vulcanizing bladder of the present invention. In addition to the transfer mold 1, the adhering means 3 and the heating means 5, this coating apparatus includes a holding means 11 for holding a tire vulcanizing bladder 8 and a tire vulcanizing bladder 8 held by the holding means 11. It has moving means 12 for moving into the transfer mold 1 and expansion means 13 for expanding the tire vulcanizing bladder 8 in the transfer mold 1. The holding means 2 having the cylinder 2A and the moving means 4 having the gripping member 4A are not provided. Since the transfer mold 1, the adhering means 3 and the heating means 5 have the same configuration as described above except for a part thereof, the same components are denoted by the same reference numerals, and redundant description is omitted.

  The tire vulcanizing bladder 8 is removed from the tire vulcanizer, and the holding means 11 has upper and lower gripping portions 11 a and 11 b that grip the upper end portion and the lower end portion of the tire vulcanizing bladder 8. The configuration of the gripping portions 11a and 11b is the same as that of the gripping portion of the tire vulcanizing bladder 8 in the tire vulcanizer.

  The moving means 12 has an elevating cylinder 12A for elevating the holding means 11, and the holding means 11 is attached to the upper end of a rod 12A1 extending above the elevating cylinder 12A. The tire vulcanizing bladder 8 held by the holding means 11 is moved between the transfer position in the transfer mold 1 and the standby position outside the transfer mold 1 by the operation of the lifting cylinder 12A driven by a drive source (not shown). It can be moved up and down.

  The expansion means 13 includes a supply source 13 </ b> A for supplying a fluid made of a gas such as air or a liquid such as water into the tire vulcanizing bladder 8 held by the holding means 11. The supply source 13A is connected to the inside of the tire vulcanizing bladder 8 via a pump 13B and a pipe line 13C. The fluid is supplied into the tire vulcanizing bladder 8 by the operation of the expansion means 13, whereby the tire vulcanizing bladder 8 is expanded, and the outer surface 8 a of the tire vulcanizing bladder 8 is applied to the inner surface 1 a of the transfer mold 1. It is possible to contact.

  The transfer mold 1 is supported by a support member (not shown) and fixed at a predetermined position. The far-infrared heater 5A of the heating means 5 is fixed to a bracket (not shown) extending from the support member. The application unit 3A of the moving unit 12, the expanding unit 13, and the attaching unit 3 is provided on a moving body 16 that is movably installed on the base B. The supply unit 3B of the attaching unit 3 includes a holding member 3BX that holds the support plate 3B4 in place of the rotating member 3B3.

  Hereinafter, the mold release liquid application method to the tire vulcanization bladder of the present invention will be described using the above-described coating apparatus of FIG.

  First, the elevating cylinder 3A3 of the attaching means 3 is operated, the rod 3A4 extends upward, and the rotating disk 3A5 is inserted into the lower position in the transfer mold 1. The motor 3A6 operates and the rotating shaft 3A1 rotates at a constant speed, while the release liquid is supplied onto the rotating disk 3A5 from the supply port x of the supply head part 3B1 located near the upper part of the rotating disk 3A5. . The release liquid supplied onto the rotating disk 3A5 is scattered outside by the centrifugal force of the rotating rotating disk 3A5 and adheres to the inner surface 1a of the transfer mold 1.

  The rod 3B6 gradually expands and contracts to move the supply head portion 3B1 upward, while the rod 3A4 gradually extends upward to move the rotary disk 3A5 upward, while releasing the entire inner surface 1a of the transfer mold 1 Allow liquid to adhere.

  When the step of attaching the release liquid to the inner surface 1a of the transfer mold 1 is completed, the rod 3A4 expands and contracts to lower the rotating disk 3A5 and retracts downward from the transfer mold 1, while the rod 3B6 further expands and contracts. The supply head unit 3B1 is raised and retracted upward from the transfer mold 1.

  When the rotating disk 3A5 is retracted downward, the moving body 16 moves by a predetermined amount in the direction indicated by the arrow, and the tire vulcanizing bladder 8 attached to the holding means 11 is positioned below the transfer die 1. Next, the elevating cylinder 12 </ b> A of the moving unit 12 is activated, the rod 12 </ b> A <b> 1 extends upward, and the tire vulcanizing bladder 8 held by the holding unit 11 is inserted into a predetermined position in the transfer mold 1.

  After the insertion, the far infrared heater 5A of the heating means 5 is turned on to heat the transfer mold 1. As a result, the inner surface 1a of the transfer mold 1 and the outer surface 8a of the expanding tire vulcanizing bladder 8 are in smooth contact with each other, facilitating uniform transfer of the mold release liquid.

  Subsequently, the fluid is supplied from the supply source 13A of the expansion means 13 into the tire vulcanizing bladder 8, and the tire vulcanizing bladder 8 is inflated and brought into contact with the inner surface 1a of the transfer mold 1 to adhere to the inner surface 1a. The mold liquid is applied to the outer surface 8a of the tire vulcanizing bladder 8 by transfer. At this time, the air between the inner surface 1 a of the transfer mold 1 and the outer surface 8 a of the inflated tire vulcanizing bladder 8 and the excessive mold release liquid adhering to the inner surface 1 a of the transfer mold 1 are transferred to the transfer mold 1. It is pushed out by a tire vulcanizing bladder 8 that is in contact with the inner surface 1a of the tire and is discharged from the vent hole 6 to the outside. The transfer amount of the mold release liquid is adjusted by adjusting the expansion amount of the tire vulcanizing bladder 8. Thus, even if the coating apparatus of FIG. 7 is used, the same effect as described above can be obtained.

  In the present invention, as shown in FIG. 8, the inner surface 1a of the transfer mold 1 has a grid-like groove 20 over at least the entire region 1X where the tire vulcanizing bladder 8 contacts, so that the mold release liquid is used. It may be possible to disperse and adhere to the inner surface 1a without being biased. The width of the groove 20 can be about 1 mm, and the interval between the lattices can be about 10 mm. Instead of the lattice-shaped grooves 20, fine lattice-shaped protrusions may be used.

  The tire vulcanizing bladder 8 may be a bladder made only of rubber or a bladder having a structure in which a textile is embedded in a rubber layer. Since the tire vulcanizing bladder with embedded textiles has a small amount of deformation at the time of expansion, more uniform application of the mold release liquid can be achieved by transfer.

  Further, in the above embodiment, the heating means 5 is configured to heat the transfer mold 1, but it may be configured to heat the tire vulcanizing bladder 8 instead of the transfer mold 1. Both of the tire vulcanizing bladders 8 may be heated. In the embodiment shown in FIG. 1, as a heating means for heating the tire vulcanizing bladder 8, low pressure steam or gas is supplied to the gas or liquid supplied into the tire vulcanizing bladder 8 in order to expand the tire vulcanizing bladder 8. A heating medium such as warm water can be used, and these can be used as heating means. In the embodiment shown in FIG. 7, a heating medium such as low-pressure steam or warm water can be used as the fluid supplied from the supply source 13 </ b> A of the expansion means 13, and these can be used as the heating means.

When 1500 tires of 195 / 65R15 size were vulcanized using the coating apparatus shown in FIG. 1, it was confirmed that there was no vulcanization failure due to the mold release liquid. Each condition is as follows.
Transfer mold: made of rubber, 360mm in height, 460mm in diameter (maximum outer diameter)
Tire vulcanization bladder: rubber, height 320mm, diameter 420mm (maximum outer diameter)
Mold release liquid: Diorganopolysiloxane-containing emulsion with a viscosity of 90 mPa · s Transfer frequency: 15 tires are vulcanized by one mold release liquid transfer Amount of mold release liquid: 20 g / time Vent hole spacing and diameter : Spacing 25mm, diameter 1mm
Number of rotations of rotating disc to be applied: 10000 rpm
Expansion condition of tire vulcanization bladder: Hold for 15 seconds at 0.015 MPa Heating means: 2 600 W far infrared heaters

It is a schematic front view which shows an example of the coating device for implementing the mold release liquid application method to the bladder for tire vulcanization | cure of this invention. It is plane explanatory drawing which shows the holding means of the coating device of FIG. It is a principal part enlarged view of a transfer type inner surface. It is explanatory drawing which makes a mold release liquid adhere to a transfer type | mold inner surface using the centrifugal force of a rotating disc. It is explanatory drawing which shows the state which inserted the bladder for tire vulcanizations in the transfer type | mold. It is explanatory drawing which shows the state which expanded the bladder for tire vulcanization within a transfer type | mold. It is a schematic front view which shows the other example of the coating device for enforcing the mold release liquid application method to the bladder for tire vulcanization | cure of this invention. It is a principal part enlarged view of the inner surface in the other example of a transfer type | mold.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transfer mold | type 1a Inner surface 1b Outer surface 2 Holding means 3 Adhering means 4 Moving means 5 Heating means 6 Vent hole 8 Tire vulcanization bladder 8a Outer surface 11 Holding means 12 Moving means 13 Expansion means 20 Groove

Claims (9)

  A step of attaching a mold release liquid to the inner surface of the cylindrical transfer mold, a step of inserting a tire vulcanizing bladder into the transfer mold, and expanding the tire vulcanizing bladder to adhere to the inner surface of the transfer mold. A method for applying a mold release liquid to a tire vulcanization bladder comprising a step of transferring a mold release liquid to the outer surface of a tire vulcanization bladder.   The method for applying a release liquid to the tire vulcanization bladder according to claim 1, wherein the transferring step is performed while the transfer mold and / or the tire vulcanization bladder is heated.   The method for applying a mold release liquid to the tire vulcanization bladder according to claim 1, wherein the transfer mold is formed by arranging vent holes penetrating from the inner surface to the outer surface of the transfer mold at a predetermined interval.   The mold release liquid application method to the tire vulcanization bladder according to claim 1, wherein the transfer mold has lattice-shaped grooves or protrusions on an inner surface.   A cylindrical transfer mold for transferring the mold release liquid to the outer surface of the tire vulcanization bladder, an attaching means for attaching the mold release liquid to the inner surface of the transfer mold, and the transfer mold as a tire for a tire vulcanizer A release liquid coating apparatus for a tire vulcanizing bladder, comprising a moving means for moving to a vulcanizing bladder.   A cylindrical transfer mold for transferring the mold release liquid to the outer surface of the tire vulcanization bladder, an attachment means for attaching the mold release liquid to the inner surface of the transfer mold, and a holder for holding the tire vulcanization bladder Means for moving the tire vulcanizing bladder held by the holding means, and expansion means for expanding the bladder for vulcanizing the tire in the transfer mold. Release liquid application device for bladder.   The mold release liquid application apparatus to the tire vulcanization bladder according to claim 5 or 6, wherein a heating means for heating the transfer mold and / or the tire vulcanization bladder is disposed outside the transfer mold.   8. The mold release liquid coating apparatus for a tire vulcanization bladder according to claim 5, wherein the transfer mold has vent holes penetrating from an inner surface to an outer surface of the transfer mold at predetermined intervals.   The mold release liquid application apparatus for a tire vulcanization bladder according to any one of claims 5 to 8, wherein the transfer mold has lattice-shaped grooves or protrusions on an inner surface.

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