JP3878856B2 - Tire vulcanization bladder insertion and removal control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tire vulcanization bladder insertion and removal control device, and more specifically, the bladder can be reliably inserted into an unvulcanized tire, and the centering of the bladder and the unvulcanized tire can be reliably performed. those related to insertion and extraction controller of tire vulcanizing bladder that can be done.
[0002]
[Prior art]
Conventionally, when a vulcanized tire is vulcanized and molded, a bladder is inserted into the unvulcanized tire and the bladder is taken out from the vulcanized tire. (A) Standing post method, (b). There are three methods such as Bagwell method and (c) Rolling method.
[0003]
As shown in FIGS. 5 (a) to 5 (d), the above-mentioned stand post system is an upper portion for fixing the upper end portion 1a of the bladder 1 that is in close contact with the vulcanized tire Wx after the tire vulcanization is completed. The clamp member 2 is raised through the center post 4 connected to the cylinder rod 3 and the internal pressure is removed from the bladder 1 to make it thinner than the inner diameter of the vulcanized tire Wx. The vulcanized tire W is removed from the bladder 1 by peeling off from the inner wall.
[0004]
Next, an unvulcanized tire W is inserted into the bladder 1, a pressurized fluid is supplied into the bladder 1, and internal pressure is applied to the unvulcanized tire W to perform vulcanization molding.
[0005]
In addition, as shown in FIGS. 6A to 6D, the bagwell system vulcanizes the upper end portion 1a of the bladder 1 that is in close contact with the vulcanized tire Wx after the tire vulcanization is completed. The bladder 1 is peeled off from the inner wall of the vulcanized tire Wx by being pushed into a container 6 having a concave section provided at the lower part of the lower mold (not shown) by a cylinder 5 installed at the upper part of the machine, and the vulcanized tire W is removed from the bladder 1. .
[0006]
Next, after the unvulcanized tire W is set again at a predetermined position, an internal pressure is applied to the bladder 1 that has been pushed into the container 6 so as to be fitted into the unvulcanized tire W, and the bladder 1 is further pressurized. A fluid is supplied and vulcanization molding is performed by applying an internal pressure to the unvulcanized tire W.
[0007]
Further, as shown in FIGS. 7A to 7D, the rolling method is a combination of the standing post method and the bagwell method, and is closely fitted into the vulcanized tire Wx after the tire vulcanization is completed. The upper clamp member 2 for fixing the upper end portion 1a of the mating bladder 1 is pulled down the center post 4 connected to the cylinder rod 3 and pushed into a container 6 having a concave section installed below the lower mold (not shown). With this, the bladder 1 is peeled off from the inner wall of the vulcanized tire Wx, and the vulcanized tire W is removed from the bladder 1.
[0008]
Next, after setting the unvulcanized tire W again at a predetermined position, an internal pressure is applied to the bladder 1 that has been pushed into the container 6, and it is raised by the center post 4 and fitted into the unvulcanized tire W. Further, a pressurized fluid is supplied into the bladder 1 to apply an internal pressure to the unvulcanized tire W to perform vulcanization molding.
[0009]
Furthermore, as a modified example of the standing post system, a tire vulcanizing press device that inserts and removes the bladder by twisting the bladder when the bladder and the tire are peeled off and when the bladder is extended and folded is proposed. (JP-A-57-87350).
[0010]
[Problems to be solved by the invention]
However, in the above-mentioned stand post system, when the bladder 1 tightly fitted in the vulcanized tire Wx is peeled off, the ascending stroke of the center post 4 is long, the vulcanizing apparatus is enlarged and the diameter is reduced. When the unvulcanized tire W is inserted into the bladder 1 and is fitted into the unvulcanized tire W while applying an internal pressure to the bladder 1 to be inflated, the bladder 1 may protrude from the unvulcanized tire W, There was a problem that the centering could not be performed accurately on the vulcanized tire W, and the insertion work of the bladder 1 could not be performed efficiently.
[0011]
The present invention pays attention to such conventional problems, and can reliably insert the bladder into the unvulcanized tire and can reliably perform the centering of the bladder and the unvulcanized tire. Provided is a tire vulcanization bladder insertion / removal control device that can be reliably inserted and removed without increasing the size of the device even if the tire is used. It is for the purpose.
[0012]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention achieves the above-mentioned object by providing an upper clamp member fixed to a vertically movable center post disposed at the center of a tire mold and an upper end of a barrel-shaped bladder having openings at upper and lower end portions. A tire vulcanization bladder insertion and removal control device, wherein the lower end portion is fixed to a lower clamp member, and the upper end portion of the bladder is inserted into an unvulcanized tire or tire vulcanization. At the end of the vulcanization, there is provided a raising / rotating means for the bladder that is raised through the upper clamp member and torsionally narrowed down to the outer diameter that can be taken out from the inner diameter portion of the tire, and the raising / rotating means of this bladder is a center post with the upper clamp member attached The gist is that a rotary drive device is connected to an elevating cylinder for elevating and lowering.
[0013]
Here, the rotating means of the bladder is configured to connect the rotation drive device provided in the vulcanized tire take-out device and the upper clamp member.
[0014]
In addition, another tire vulcanization bladder insertion and removal control device according to the present invention includes an upper clamp member fixed to a vertically movable center post disposed at a tire mold center portion, and an opening portion at an upper and lower end portion. An apparatus for controlling insertion and extraction of a tire vulcanization bladder, in which an upper end portion of a barrel-shaped bladder provided with a lower end portion is fixed to a lower clamp member. When the tire is inserted into the tire or at the end of the tire vulcanization, there is provided a raising / rotating means for the bladder that is raised and narrowed to the outer diameter that can be taken out and removed from the inner diameter of the tire via the upper clamp member. Consists of a lift cylinder that raises and lowers the center post and a rotary drive means that rotates the upper clamp member that fixes the upper end of the bladder. The stage is characterized in that a drive motor is attached to a carry-in / carry-out device for unvulcanized tires and vulcanized tires, and the upper clamp member is rotated 180 degrees via the drive motor and the gear coupling mechanism. Is.
[0015]
Thus, after the tire vulcanization is completed, the bladder internal pressure in the vulcanized tire is removed and contracted, and the upper clamp member of the bladder is positioned between the upper surface of the unvulcanized tire and the upper surface of the vulcanized tire. The upper clamp member is turned by a predetermined angle while removing the bladder internal pressure, twisting the outer shape of the bladder to peel off the bladder from the inner wall surface of the tire, and further to the outer diameter where the bladder can be taken out from the inner diameter portion of the tire Since the vulcanized tire is taken out from the bladder with the twisted-down state, the vulcanized tire can be easily taken out without damaging the bladder, and after the vulcanized tire is taken out from the bladder, Insert the unvulcanized tire to the position necessary for molding the tire, and inflate the bladder while releasing the twist of the bladder to form the tire. It is also possible to carry out, by performing further bladder top of rise and a twisting simultaneously can be performed easily folding of the bladder.
[0016]
By comprising in this way, the whole apparatus can be reduced in size and it can insert and take out the tire vulcanization bladder reliably.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
In addition, the same component as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description.
[0018]
FIG. 1 is a cross-sectional view of a tire vulcanizer during a vulcanization process for implementing a tire vulcanization bladder insertion and removal control method, and FIG. 2 is a tire vulcanizer during a tire removal process after completion of vulcanization. FIG. 3 is a sectional view of a tire vulcanizing apparatus in a process of inserting an unvulcanized tire W into a bladder, and FIG. 4 is a vulcanized tire by supplying a heating / pressurizing fluid such as gas or steam to the bladder. 1 shows a cross-sectional view of a tire vulcanizer during a molding process.
[0019]
FIG. 1 is a sectional view of a tire vulcanizing apparatus using a sectional mold. This tire vulcanizing apparatus includes a lower mold 12 installed on a base plate 11 and an upper mold 14 suspended from an inner top plate 13. The sector mold 16 divided into a plurality of parts in the circumferential direction around the bladder center mechanism 15 is disposed.
[0020]
The sector mold 16 divided into a plurality of parts slides up and down in the horizontal radial direction through the segments 19 by raising and lowering the outer ring 18 constituting the sectional container attached to the top plate 17, thereby unvulcanized tire W. It contacts or separates from the tread Wa.
[0021]
The bladder center mechanism 15 includes a center post 21 that can be lifted and rotated connected to a lifting / rotating means 20 such as a swing type cylinder, an upper clamp member 22 fixed to the upper end of the center post 21, and an upper clamp. A barrel-shaped bladder 24 fixed to the member 22 and the lower clamp member 23, and a supply pipe 25 a and an exhaust pipe for supplying and discharging the heating / pressurizing fluid Q into the bladder 24 are supplied to the lower clamp member 23. 25b is connected.
[0022]
Ascending / rotating means 20 such as a swing type cylinder uses a known cylinder having a stroke of about 300 mm and a swing angle (twist angle) of 180 degrees, and the internal pressure of the bladder 24 is a safety problem at the end of tire vulcanization. When the upper post 14 and the plurality of sector molds 16 are opened by lowering to a level (generally 0.1 MPa), and the center post 21 is raised through the upper clamp member 22 at the same time, the bladder 24 is turned 180 degrees. It is raised as if twisted.
[0023]
The twisting torque necessary for folding the bladder 24 is usually 98 Nm or less.
The ascending / rotating means 20 is not limited to a swing-type cylinder or the like, and includes an elevating cylinder for raising and lowering the center post 21 and a rotation driving means for rotating the upper clamp member 22 to which the upper end of the bladder 24 is fixed. The rotation driving means may be configured by attaching a drive motor 27 to a loading / unloading device 26 for an unvulcanized tire W and a vulcanized tire Wx, which will be described later, and the drive motor 27 and gears. It is also possible to configure the upper clamp member 22 to rotate 180 degrees via the coupling mechanism 28.
[0024]
Next, a method for controlling insertion and removal of the tire vulcanization bladder will be described.
As shown in FIG. 1, during the vulcanization process, the lower mold 12 installed on the base plate 11 and the upper mold 14 and the sector mold 16 suspended from the inner top plate 13 are closed and unvulcanized. A heated / pressurized fluid Q of a predetermined pressure is supplied into the bladder 24 fitted in the tire W to apply the internal pressure, and the unvulcanized tire W is applied to the lower mold 12, the upper mold 14 and the sector mold 16. Crimp.
[0025]
In this way, vulcanization is performed for a predetermined time, and after the tire vulcanization is completed, the internal pressure in the bladder 24 is lowered to a level where there is no safety problem (generally 0.1 MPa), and the sector mold 16 and the lower mold 12. The upper mold 14 is opened and the vulcanized tire Wx is taken out.
[0026]
As shown in FIG. 2, the vulcanized tire Wx is taken out by driving the ascending / rotating means 20 such as a swing type cylinder to raise the center post 21 to a predetermined position (stroke 300 mm) and the upper clamp member 22. At the same time, the bladder 24 is turned from the inner wall surface of the vulcanized tire Wx by turning the bladder 24 by a predetermined angle (for example, 180 degrees) to twist the outer shape of the bladder.
[0027]
An upper position of the upper clamp member 22 attached to the center post 21 is not more than a height required for shaping the unvulcanized tire W (for example, the upper surface of the unvulcanized tire W), and the upper surface of the vulcanized tire Wx. A position between is preferred. In this way, by defining the ascending position of the bladder 24, when the outer shape of the bladder is twisted, the bladder 24 can be folded into a well-formed shape, and the bladder 24 can operate in a vertically symmetrical range.
[0028]
If the twisting torque is continuously applied to the bladder 24 during the contraction process of the bladder 24, the bladder 24 can be folded into a more uniform shape, and the bladder 24 can be more easily folded when used in combination with a vacuum device. Further, as described above, the twist angle required to fold the normal bladder 24 on the barrel shape is about 180 degrees, and the twist torque required to fold the normal bladder 24 is 98 N · m or less.
[0029]
In this way, a plurality (generally three in the circumferential direction) suspended from the loading / unloading device 26 in a state where the bladder 24 is twisted and squeezed to an outer diameter that can be taken out from the inner diameter portion of the vulcanized tire Wx. ) Is carried to the upper part of the vulcanized tire Wx, the bead portion Wz of the vulcanized tire Wx is hooked from the inside by the hook claw 26a, lifted, and carried out to the next process.
[0030]
Further, in the process of inserting the unvulcanized tire W into the twisted bladder 24 as described above, as shown in FIG. 3, the green tire W molded in the molding process is hooked to the loading / unloading device 26. While being held suspended by the claws 26a, the bladder 24 is inserted to a position (shaping position) necessary for tire molding around the bladder 24 and placed on the lower molding 12.
[0031]
Then, as shown in FIG. 4, the heating / pressurizing fluid Q having a predetermined pressure is introduced into the twisted bladder 24 from the supply pipe 25a of the heating / pressurizing fluid Q and the twisting of the bladder 24 is released. The bladder 24 is inflated to form a tire. At this time, since the height of the bladder 24 is close to the height required for molding the unvulcanized tire W, proper molding can be easily performed, and the bladder 24 operates symmetrically up and down. 24 and the unvulcanized tire W are reliably centered.
[0032]
Furthermore, when the heating / pressurizing fluid Q having a predetermined pressure is introduced into the bladder 24, the ascending / rotating means 20 is driven in reverse to force the center post 21 to rotate without causing the center post 21 to rotate. Twist is automatically eliminated, and the bladder 24 and the unvulcanized tire W are correctly combined.
[0033]
【The invention's effect】
Since the present invention is configured as described above, the following excellent effects can be obtained. (a) Since slipping is not required when inserting the bladder, the bladder can be reliably inserted into the unvulcanized tire.
(b) Since the bladder operates vertically symmetrically, the centering of the bladder and the unvulcanized tire can be reliably performed.
(c) Since the bladder does not extend excessively, there is little risk of damage even with a thin bladder of 1 mm or less, and the bladder can be inserted and removed.
(d) The tire vulcanization bladder insertion and removal control device can reliably insert and take out the tire vulcanization bladder without increasing the size of the device.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a tire vulcanizer during a vulcanization process for implementing a tire vulcanization bladder insertion and removal control method.
FIG. 2 is a cross-sectional view of the tire vulcanizer during a tire take-out process after completion of vulcanization.
FIG. 3 is a cross-sectional view of a tire vulcanizing apparatus in a process of inserting an unvulcanized tire into a bladder.
FIG. 4 is a cross-sectional view of a tire vulcanizer during a tire vulcanization molding process.
FIGS. 5A to 5D are process explanatory diagrams of a conventional standing post method in which a bladder is inserted into an unvulcanized tire and a bladder is taken out from a vulcanized tire.
FIGS. 6A to 6D are process explanatory diagrams of a conventional bagwell system in which a bladder is inserted into an unvulcanized tire and a bladder is taken out from a vulcanized tire.
FIGS. 7A to 7D are process explanatory diagrams of a conventional rolling method in which a bladder is inserted into an unvulcanized tire and a bladder is taken out from a vulcanized tire.
[Explanation of symbols]
1 Bladder 1a Upper end of bladder 2 Upper clamp member 3 Cylinder rod 4 Center post 5 Cylinder 11 Base plate 12 Lower mold 13 Inner top plate 14 Upper mold 15 Bladder center mechanism 16 Sector mold 17 Top plate 18 Outer ring 19 Segment 20 Up / Rotation Means 21 Center post 22 Upper clamp member 23 Lower clamp member 24 Bladder 25a Supply pipe 25b Exhaust pipe 26 Loading / unloading device 26a Hook claw 27 Drive motor 28 Gear coupling mechanism W Unvulcanized tire Wx Vulcanized tire Q Heating / Pressurization Fluid Wz bead

Claims (3)

The upper end of a barrel-shaped bladder with an opening at the top and bottom ends is fixed to the upper clamp member fixed to the center post that can be moved up and down arranged in the center of the tire mold, and the lower end is clamped at the lower end. An insertion and removal control device for a tire vulcanization bladder fixed to a member,
Ascending / rotating means of the bladder for narrowing the upper end of the bladder to the outer diameter that can be lifted and removed from the tire inner diameter portion through the upper clamp member when inserted into an unvulcanized tire or at the end of tire vulcanization. The ascending / rotating means of the bladder is provided with a rotation drive device connected to a lifting cylinder for raising and lowering a center post to which an upper clamp member is attached. . 2. The tire vulcanization bladder insertion and removal control device according to claim 1, wherein the rotation means of the bladder is configured to connect a rotation drive device provided in a vulcanized tire take-out device and an upper clamp member . The upper end of a barrel-shaped bladder with an opening at the top and bottom ends is fixed to the upper clamp member fixed to the center post that can be moved up and down arranged in the center of the tire mold, and the lower end is clamped at the lower end. An insertion and removal control device for a tire vulcanization bladder fixed to a member,
Ascending / rotating means for the bladder to narrow down the upper end of the bladder to an outer diameter that can be lifted and removed from the inner diameter of the tire through the upper clamp member when inserted into an unvulcanized tire or at the end of tire vulcanization. The raising / rotating means of the bladder is configured by separating a lifting cylinder for raising and lowering the center post and a rotation driving means for rotating the upper clamp member that fixes the upper end of the bladder. A tire vulcanization characterized in that a drive motor is attached to an unvulcanized tire and a vulcanized tire carrying-in / out device, and an upper clamp member is rotated 180 degrees via the drive motor and a gear coupling mechanism. Bladder insertion and removal control device.

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