JP2005081255A - Method of applying release agent to green tire and device for the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of applying a release agent to improve releasing properties so as to avoid adhesion of the inner or outer surface of a molded green tire to the bladder or the mold during vulcanization molding and a device for the method. <P>SOLUTION: In a device 10 for applying a release agent, an arm 13 held by a support 11 through a lifting cylinder 12 is attached through an oscillating cylinder 14 in a revolvable way. A spray gun 15 is mounted on the tip of the arm 13, and the gun 15 is attached so as to be rotatable around the rotating shaft 17 driven by a rotary drive motor 16 arranged on the arm 13. The shaft 17 of the gun 15 is connected with two or more long hoses 19 for supplying a release agent. The hoses 19 are configurated so as to be wound twice or more onto a rolling shaft 17 of the gun 15 when a releasing agent Qa is being applied to a green tyre Wa and to be housed in a wound manner within a hose-housing case 20 arranged above the shaft 17 after completion of the application. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

    The present invention relates to a method and apparatus for applying a release agent to a green tire, and more specifically, the inner peripheral surface or the outer peripheral surface of a molded green tire is not attached to a bladder or a mold at the time of vulcanization molding. The present invention relates to a release agent coating method and apparatus for applying a release agent to improve the quality.

  Conventionally, a mold release agent coating device is applied to the inner peripheral surface or outer peripheral surface of a molded green tire (unvulcanized tire) in order to improve the releasability without sticking to a bladder or mold during vulcanization molding. It is known to apply using a spray gun or the like (see, for example, Patent Document 1).

  By the way, a release agent coating apparatus in a large lot line or the like is generally a method in which a spray gun of a release agent coating apparatus is fixed and a green tire is swirled, and the green tire is swirled. For example, in the case of a production method in which a tire molding process and a vulcanization process are directly connected via an intermediate storage, it becomes difficult to phase the green tire and the mold in the vulcanization process, and the quality of the finished tire is improved. There was a problem that I could not do it.

  In addition, in the method of fixing the spray gun of the release agent coating device and swirling the green tire, it is necessary to install a rotational position detection device etc. in order to eliminate the phase change of the green tire. There is a problem of high costs.

  On the other hand, as shown in FIG. 6, in the method in which the green tire W is placed and fixed on the pallet 1 or the like and the spray gun 3 of the release agent coating device 2 is turned, the rotating shaft 4 of the spray gun 3 and a plurality of the rotating shafts 4 are arranged. Although the rotary seal 6 is used at the connection portion with the release agent supply hose 5 of the release agent Q, the component of the release agent Q may contain a substance that can be an abrasive. If it is included, there is a problem in that wear of the rotary seal portion 6a occurs and a failure occurs in a short time.

  In addition, 5a shows the mold release agent supply port in the mold release agent supply hose 5, 5b shows the on-off valve operation air supply port, and 5c shows the blowing air supply port.

In addition, as described above, in the case of the production method in which the tire molding process and the vulcanization process are directly connected via the intermediate storage, if the release agent coating device breaks down due to the above reasons, the storage of the green tire in the intermediate storage Since it becomes impossible, the tire molding machine cannot be operated inevitably, which causes a significant decrease in the production volume of the molding machine.
Japanese Patent Laid-Open No. 7-195002 (pages 2 to 3 and FIG. 1)

  This invention pays attention to such a conventional problem, and as a turning method of the spray gun of the release agent coating device, it is configured so that it can be turned by a simple mechanism without using a rotary seal. Providing a mold release agent coating method and apparatus for green tires that can prevent equipment failures and improve tire productivity and improve the uniformity of finished tires It is intended to do.

  In order to achieve the above object, the present invention provides a method of applying a release agent to a green tire according to the present invention, wherein the release agent is applied to the green tire while rotating the spray gun in a certain direction. Apply a long release agent supply hose around the rotating shaft a predetermined number of times, and rotate the spray gun in the reverse direction after applying the release agent and before applying the next release agent. In addition, the gist is to unwind the release agent supply hose by the hose housing case.

  Here, the mold release agent is applied to at least one of the inner peripheral surface and the outer peripheral surface of the green tire in a state in which the tire molding process and the vulcanization process are directly connected via the intermediate storage and fixed to the storage pallet of the intermediate storage. Is applied.

  As described above, the spray agent swiveling method of the release agent coating apparatus is configured so that it can be swung by a simple mechanism without using a conventional rotary seal. This can be prevented and the tire productivity can be improved.

  In addition, the release agent coating apparatus for a green tire according to the present invention directly connects the tire molding process and the vulcanization process via an intermediate storage, and the inner peripheral surface of the green tire placed on the storage pallet of the intermediate storage Alternatively, a release agent application device for a green tire that applies a release agent to at least one of the outer peripheral surfaces by means of a spray gun capable of swiveling the release agent application device. The agent supply hose is connected. The release agent supply hose is wound around the take-up shaft of the spray gun when the release agent is applied to the green tire, and is unwound from the hose housing case after the release agent application is completed. The gist is that it is configured as described above.

  Here, the spray gun of the release agent coating apparatus is attached to the tip of an arm that can be swung and moved up and down so as to be rotatable around a rotation shaft by a rotary drive motor, and can be wound and unwound by a hose housing case. A long release agent supply hose is connected.

  As described above, as a spray gun swiveling method of the release agent coating apparatus, a long release agent supply hose is connected to the spray gun, and this release agent supply hose is used for supplying the release agent to the green tire. When applying, it is wound around the take-up shaft of the spray gun, and after the release agent application is completed, it is configured to unwind from the hose housing case, so that there is less failure of the release agent application device and tire productivity is improved. In addition, the uniformity of the finished tire can be improved, and the structure is simple, so that it can be performed with inexpensive equipment.

  As described above, according to the present invention, the method of applying the release agent to the green tire is such that when the release agent is applied to the green tire while turning the spray gun in a certain direction, the long release agent connected to the spray gun is used. Apply the mold supply hose while winding it around the rotating shaft a predetermined number of times. After completing the application of the release agent, turn the spray gun in the reverse direction before applying the next release agent. Since the release agent supply hose is unwound by using a simple mechanism, it is possible to prevent failure of the release agent application device by using a simple mechanism without using a conventional rotary seal. In addition, the productivity of the tire can be improved and the uniformity of the finished tire can be improved.

  In addition, the release agent coating apparatus for a green tire according to the present invention directly connects the tire molding process and the vulcanization process via an intermediate storage, and the inner peripheral surface of the green tire placed on the storage pallet of the intermediate storage Alternatively, a release agent application device for a green tire that applies a release agent to at least one of the outer peripheral surfaces by means of a spray gun capable of swiveling the release agent application device. The agent supply hose is connected. The release agent supply hose is wound around the take-up shaft of the spray gun when the release agent is applied to the green tire, and is unwound from the hose housing case after the release agent application is completed. As a result, it is possible to improve the productivity of the tire and improve the uniformity of the finished tire. Because it is simple, there is an effect that can be done in inexpensive equipment.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a schematic front view in which a release agent coating apparatus for carrying out a method for applying a release agent to a green tire according to the present invention is partially cut away. FIG. 2 is a plan view of FIG. The mold release agent coating apparatus is installed in the vicinity of the intermediate storage in a system in which a tire molding process and a vulcanization process (not shown) are directly connected via the intermediate storage.

  In the release agent coating apparatus 10, an arm 13 supported on a column 11 through a lifting cylinder 12 so as to be movable up and down is attached so as to be pivotable through a swing cylinder 14. A spray gun 15 is attached to the tip of the arm 13. The spray gun 15 is rotatably mounted around a rotating shaft 17 that is driven to rotate by a rotation driving motor 16 installed on the arm 13.

  Wa represents a green tire placed on the storage pallet 18 of the intermediate storage.

  A plurality of elongated release agent supply hoses 19 are connected to the rotating shaft 17 of the spray gun 15, and this release agent supply hose 19 is used when applying the release agent Qa to the green tire Wa. As shown in FIG. 5, the hose is wound around the take-up shaft 17 of the spray gun 15 by a plurality of rotations, and after the release agent application is completed, as shown in FIG. It is comprised so that it may be accommodated in the case 20 and wound up.

  Next, a method of applying the release agent Qa to the green tire W using the release agent application device 10 as described above will be described.

  In an embodiment of the present invention, in a production method in which a tire forming process and a vulcanizing process (not shown) are directly connected via an intermediate storage, the green tire Wa is fixed on the storage pallet 18 of the intermediate storage. The case where the mold release agent Qa is applied to the peripheral surface (in this embodiment, the method for applying the inner peripheral surface will be described, but the description is omitted because the outer peripheral surface is the same) is described.

  First, when the green tire Wa is placed on the storage pallet 18 in the vicinity of the intermediate storage from the tire molding process, the arm 13 of the release agent coating apparatus 10 waiting at the standby position is moved by the swing cylinder 14. The spray gun 15 of the release agent coating apparatus 10 is lowered to a predetermined position by the arm 13 via the lifting cylinder 12 while swinging to the coating position.

  From such a state, the spray gun 15 is rotated in the green tire Wa via the rotating shaft 17 that is rotationally driven by the rotational drive motor 16, and the mold release agent is formed on the inner peripheral surface of the green tire Wa as shown in FIG. Start application of Qa. At this time, the long release agent supply hose 19 connected to the rotating shaft 17 of the spray gun 15 is moved from the state of FIG. 4 to the rotating shaft 17 a predetermined number of times (about 3 to 5 rotations) as shown in FIG. Apply while winding. Then, after the application of the release agent Qa is completed, the rotation of the spray gun 15 is stopped, and the spray cylinder 15 is raised from the inside of the green tire Wa to the standby position in the vertical direction by the elevating cylinder 12, and further the next release Until the agent Qa is applied, the spray gun 15 is rotated in the reverse direction by the rotary drive motor 16 to unwind and store the release agent supply hose 19 in the hose storage case 20.

  And when apply | coating the mold release agent Qa with respect to new green tire Wa again, operation similar to the above is performed repeatedly.

  Thus, as a spray gun swiveling method of the release agent coating apparatus 10, a simple mechanism for winding and unwinding the long release agent supply hose 19 without using a conventional rotary seal is used. By being configured so as to be able to turn, the failure of the release agent coating apparatus 10 can be prevented in advance and the productivity of the tire can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view in which a release agent coating apparatus for carrying out a release agent application method for a green tire according to the present invention is partially cut away. It is a top view of FIG. It is an enlarged front view in which the spray gun of the present invention is partially cut away. It is explanatory drawing which shows the winding state of the mold release agent supply hose before spraying a mold release agent. It is explanatory drawing which shows the winding state of the mold release agent supply hose at the time of completion | finish of application | coating of a mold release agent. It is an enlarged front view in which a conventional spray gun is partially cut away.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pallet 2 Release agent application apparatus 3 Spray gun 4 Rotating shaft 5 Release agent supply hose 6 Rotary seal 5a Release agent supply port 5b Opening / closing valve operation air supply port 5c Spraying air supply port 6a Rotation seal part Q Release agent W Green tire 10 Release agent coating device 11 Post 12 Elevating cylinder 13 Arm 14 Oscillating cylinder 15 Spray gun 16 Rotation drive motor 17 Rotating shaft 18 Pallet for storage of intermediate storage 19 Release agent supply hose 20 Hose storage case Qa Release agent Wa Green Tire

Claims (4)

In a state where the molded green tire is placed, at least one of the inner peripheral surface and the outer peripheral surface of the green tire is applied to the green tire where the release agent is applied while turning the spray gun of the release agent application device. In the mold application method,
When applying the release agent to the green tire while turning the spray gun in a certain direction, apply the long release agent supply hose connected to the spray gun while winding it around the rotating shaft a predetermined number of times. The spray gun is swung in the reverse direction until the next release agent is applied after the application of the release agent, and the release agent supply hose is unwound by the hose housing case. Release agent coating method. The tire molding step and the vulcanization step are directly connected via an intermediate storage, and a release agent is applied to at least one of the inner peripheral surface or the outer peripheral surface of the green tire fixed to the storage pallet of the intermediate storage. The release agent coating method to the green tire according to claim 1. The tire molding process and the vulcanization process are directly connected via an intermediate storage, and the release agent coating device can be swung on at least one of the inner and outer peripheral surfaces of the green tire placed on the pallet for storage in the intermediate storage A release agent application device for a green tire that applies a release agent with a simple spray gun,
A long release agent supply hose is connected to the spray gun, and the release agent supply hose is wound around the take-up shaft of the spray gun when the release agent is applied to the green tire. A device for applying a release agent to a green tire, wherein the device is configured to unwind from a hose housing case after the application is completed. The spray gun of the release agent coating device is attached to the tip of an arm that can be swung and moved up and down so that it can be rotated around a rotating shaft by a rotary drive motor, and can be wound and unwound by a hose housing case. The release agent coating device for a green tire according to claim 3, wherein the release agent supply hose is connected.

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