JPH0562046B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a split die opening/closing device for a tire vulcanizer.

(Prior Art) Conventionally, in a tire vulcanizer, a tread mold portion of a split mold is divided into a plurality of fan-shaped blocks, and each of the fan-shaped blocks is opened and closed radially.

In addition, when the upper bolster plate of the tire vulcanizer is raised and the tread mold is opened, the outer ring and upper sidewall mold are raised together with the upper bolster plate, and the tire vulcanizer is opened. It is necessary to close the tread mold by retracting the mold cylinder, but the cylinder and the upper sidewall mold are connected by bolts and a flange provided at the tip of the cylinder.

(Problems to be Solved by the Invention) In the conventional tire vulcanizing machine, when the split mold device is removed for replacement (change in production size or type) or replaced with a new one, the split mold The work efficiency is very poor because the operator inside the tire vulcanizer must perform overhead work to attach and detach the operation cylinder using the bolt. Additionally, the work required a long time, reducing the operating rate of the tire vulcanizer.

The present invention is intended to solve the above-mentioned problems, and its purpose is to enable the split mold device to be attached and detached from the split mold operation cylinder with a single touch, and to replace the split mold device. The object of the present invention is to provide a split die type opening/closing device for a tire vulcanizer that can easily and quickly perform the following steps.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes an upper bolster supported by a vulcanizer main body so as to be movable up and down, and an upper heating plate attached to the lower surface of the upper bolster. , an outer ring having a conical inner surface attached to the outer periphery of the upper hot plate facing downward; a lower hot plate attached to the fixed base of the vulcanizer; A tread mold that slidably engages with the conical inner surface of the outer ring, an upper sidewall mold that slidably engages the head of the tread mold, and an inner peripheral portion of the upper sidewall mold. Consisting of a fixed upper bead ring, a lower sidewall mold fixed on the lower heating plate inside the tread mold, and a lower bead ring fixed to the inner periphery of the lower sidewall mold. In a tire vulcanizer equipped with a split mold device,
A split-metal type operating cylinder having a bayonet lock having a pawl at its upper end and fixed upwardly to the upper bead ring, a holder facing the bayonet lock in a butting state, and a bayonet pawl engaging the pawl of the bayonet lock. , and an engagement/disengagement means for engaging/disengaging the bayonet pawl.

(Function) The split mold opening/closing device of the tire vulcanizer of the present invention is constructed as described above, and when replacing the mold, the engagement/disengagement means is operated in the disengagement direction to disengage the bayonet lock pawl. In addition, the outer ring and upper heating plate,
Then, release the attachment of the lower sidewall mold and lower hot plate, raise the upper bolster, and open the tire vulcanizer. At this time, all parts above the upper hot plate rise together with the tire vulcanizer, leaving only the split mold part on the lower hot plate. At this time, since the bayonet lock is also fixed to the upper bead ring, it remains on the split mold. At this point, the entire split mold is removed from the tire vulcanizer and a new split mold is inserted. At this time, the bayonet lock is also installed on the new split mold. Next, the tire vulcanizer is closed, and, contrary to the above-mentioned operations, the outer ring and lower sidewall mold are attached to the tire vulcanizer, and the engagement/disengagement means is operated in the engagement direction to engage the bayonet lock pawl. Match. In this state, the tire vulcanizer can enter vulcanization operation, and when opening the mold after vulcanization, the rod of the split mold operating cylinder is actuated in the extension direction. Then, the lower surface of the holder pushes the upper surface of the bayonet lock downward, and the tread mold opens radially outward via the upper bead ring and upper sidewall mold. Further, when closing the tread mold at the opening limit of the press (tire vulcanizer), the rod of the split mold operating cylinder is operated in the contraction direction. Then, the bayonet lock is lifted by the engagement of the bayonet lock pawl, and the thrust of the split mold operating cylinder is transmitted to the tread mold through the sliding part between the upper sidewall mold and the head of the tread mold. , the tread mold is raised and closed by the slope (conical inner surface) of the outer ring.

(Example) Next, the split mold opening/closing device of the tire vulcanizer of the present invention will be explained with reference to an example shown in FIG. The upper bolster 1 is used to open the machine, and an upper hot plate 3 is attached to the bottom surface of the upper bolster 1 via a heat insulating material 2.
is attached, and the lower hot plate 4 is attached to the fixed base of the vulcanizer.

Further, a split-metal type outer ring 5 is attached to the lower surface of the outer periphery of the upper hot plate 3, and the conical inner surface 5a side of the outer ring 5 is slidable in the vertical direction. There are a plurality of fan-shaped tread molds 6 to be guided, and when the vulcanizer is raised while pushing the operating cylinder 11 downward, the fan-shaped tread molds 6 are slidably engaged with the outer ring 5. Therefore, the conical inner surface (conical guide surface) 5 is sandwiched between the lower hot plate 4 and the upper side wall mold 7.
guided by a, radially opens outward in the radial direction,
When reaching the terminal end of the conical inner surface (conical guide surface) 5a, the contact with the lower heating plate 4 is broken and the conical inner surface (conical guide surface) 5a rises together with the upper bolster plate 1.

When the tire vulcanizer (press) reaches its opening limit, the cylinder 11 retracts and the tread mold 6 closes while rising.
The distance between the lower surface of the tire and the lower hot plate 4 is increased, making it possible to take out the tire and insert a new tire.

Also, during this removal and insertion, the tread mold 6
In this case, heat is sufficiently transferred from the outer ring 5. When the insertion of a new green tire is completed, the tire vulcanizer (press) operates the operation cylinder 11 in the extension direction at the opening limit position, and again the tread mold 6
Open it and make sure there is no interference between the mold and the raw tire. Thereafter, the tire vulcanizer (press) is closed, and when the lower surface of the tread mold 6 comes into contact with the lower hot plate 4, the operating cylinder 11 is pushed back and the tread mold 6 is moved between the upper side walk mold 7 and the lower surface of the tread mold 6. hot plate 4
The conical inner surface (conical guide surface) 5a of the outer ring 5 closes outward in the radial direction while being sandwiched between the two.

In addition, on the inner peripheral surface of each of the above-mentioned hull tread molds 6,
A recess is formed which engages with the tire tread portion T. Further, on the lower surface of the upper hot plate 3,
An upper side wool mold 7 is disposed so as to be able to move toward and away from the heating plate, and a lower side wall mold 8 and a lower bead ring 10 are provided on the upper surface of the lower hot plate 4. Further, an upper bead ring 9 is fixed to the side wall mold 7, and by raising and lowering the upper bead ring 9, the upper side wall mold 7
Each of the fan-shaped tread molds 6 is opened and closed radially outward through the openings.

The outline of the known split mold has been explained above, and next, the attaching/detaching mechanism between the split mold operating cylinder and the split mold, which is the most characteristic feature of the present invention, will be explained.

11 is a split mold operating cylinder, and the split mold operating cylinder 11 is fixed to the upper bolster 1 via a cap 12.

Also, the rod 11a of the split mold operation cylinder 11
A holder 13 is fixed to the lower end of the holder 13 by screwing, and a bayonet cylinder 14 is rotatably fitted into the outer peripheral surface of the holder 13.

15 is a bayonet lock. The bayonet lock 15 is fixed to the upper bead ring 9, and by rotating the bayonet ring 14, the pawl 14a of the bayonet ring 14 and the bayonet lock 1 are connected.
The claw 15a of No. 5 is engaged with and disengaged from the claw 15a.

A ring 17 is supported on the outer peripheral surface of the rod 11a of the split mold operation cylinder 11 via a bush 16, and the outer peripheral part of the ring 17 is supported by a bush 18.
It is supported by a hub 19 integral with the upper bolster 1 via. Also, at the upper end of the ring 17 is a gear 2.
0 meshes, and pinion 2 meshes with the same gear 20.
1 is supported by a shaft 22 integral with the cap 12 so as to be able to be submerged, and a lever 23 is attached to the pinion 21.

A pin 24 is fixed to the ring 17, and this pin 24 is inserted into a hole provided in the upper end flange of the bayonet ring 14 via a bush 25, and rotates the pinion 21 via a lever 23. Then, the rotation is transmitted to the ring 17 via the gear 20, causing the ring 17 to rotate.The rotation of the ring 17 is further transmitted to the bayonet ring 14 via the pin 24, causing the bayonet ring 14 to rotate. rotates, and the claw 1 of the bayonet ring 14
4a engages with and disengages from a pawl 15a of a bayonet lock 15.

A boss 26 is attached to the tip of the lever 23, and a pin 27 is inserted into the boss 26.
When the lower end of the pin 27 is engaged with one of the holes 28 provided at two locations on the upper bolster 1, the lever 2
3 (bayonet lock 15) is fixed in one of two positions: engaged and disengaged.

Next, the operation of the split die opening/closing device of the diamond vulcanizer will be specifically explained.

First, we will explain what happens when replacing the mold. At this time, by rotating the lever 23, the bayonet lock pawls 14a, 15a are released, and the pin 2
7 is inserted into one of the holes 28 to prevent the lever 23 from rotating. Also, the outer ring 5 and the upper hot plate 3, and the lower sidewall mold 8 and the lower hot plate 4 are released, the upper bolster 1 is raised, and the vulcanizer is opened.

At this time, all parts above the upper hot plate 3 rise together with the vulcanizer, leaving the parts of the split molds 5 to 8 on the lower hot plate 4. Also bayonet lock 1
Since 5 is also fixed to the upper bead ring 9, it remains on the split molds 5 to 8. Here, take out the entire split molds 5 to 8 from the vulcanizer and create new split molds 5 to 8.
Insert 8. Also, the bayonet lock 15 is installed on the new split molds 5-8.

Next, the vulcanizer is closed, and in the opposite direction to the above-mentioned operation, the outer ring 5 and the sidewall mold 8 are attached to the vulcanizer, and the pin 27 is lifted up.
Rotate the lever 23 and release the bayonet lock claw 1.
4a and 15a, and at that position, the pin 27 is inserted into another hole 28 to fix the lever 23.

In this state, the vulcanizer can enter vulcanization operation, and when opening the mold after vulcanization, the rod 11a of the split mold operating cylinder 11 is actuated in the extension direction. Then, the lower surface of the holder 13 pushes the upper surface of the bayonet lock 15 downward, and the tread mold 6 opens radially outward via the upper bead ring 9 and the upper sidewall mold 7.

When closing the tread mold 6, the rod 11a of the split mold operating cylinder 11 is operated in the retraction direction. Then, the bayonet lock claw 14
Due to the engagement of a and 15a, the bayonet lock 15 is lifted and the thrust of the split mold operating cylinder 11 is transmitted to the tread mold 6.

(Effects of the Invention) As described above, in the split mold opening/closing device of the tire vulcanizer of the present invention, the bayonet lock 15 mechanism is connected to the split mold 5 to
8, the tread mold can be attached to and removed from the split mold operating cylinder with a one-touch operation, and the tread mold can be replaced easily and quickly. Also, when opening the split mold, the tread mold 6 opens radially outward, so
This has the effect of not damaging the irregularities on the outer peripheral surface of the tire when the tread mold 6 is opened.

In this embodiment, the bayonet ring 14 is rotated by the gear 20 and the pinion 21, but this may be omitted and the lever 23 may be used to rotate the bayonet ring 14 directly. Also bayonet lock 15
The mechanism may be replaced with a screw having about one or two threads. Further, the manual lever 23 for rotating the pinion 21 may be replaced with a fluid pressure cylinder, an electric motor, etc., and may be remotely operated.

[Brief explanation of the drawing]

FIG. 1 is a vertical side view showing an embodiment of a split die opening/closing device for a tire vulcanizer according to the present invention. 1...Upper bolster, 2...Insulating material, 3...Upper heating plate, 4...Lower heating plate, 5...Outer ring, 6...
Tread mold, 7... Upper side wall mold, 8
... lower side wall mold, 9 ... upper bead ring, 10 ... lower bead ring, 11 ... split mold operating cylinder, 13 ... holder, 14 ... bayonet ring, 15 ... bayonet lock, 14a,
15a... bayonet pawl, 16-20... engagement/disengagement means.

Claims (1)

[Claims] 1. An upper bolster supported by the vulcanizer body so that it can be raised and lowered, an upper hot plate attached to the lower surface of the upper bolster, and an outer ring having a conical inner surface attached downward to the outer periphery of the upper hot plate. a lower hot plate attached to the fixed base of the vulcanizer, a tread mold fixed to the outer periphery of the lower hot plate and slidably engaged with the conical inner surface of the outer ring, and the tread metal. An upper sidewall mold that is slidably engaged with the head of the mold, an upper bead ring fixed to the inner periphery of the upper sidewall mold, and an upper bead ring fixed to the inner circumference of the upper sidewall mold, and on the lower hot plate that is inside the tread mold. In a tire vulcanizer equipped with a fixed lower sidewall mold, a lower bead ring fixed to the inner periphery of the lower sidewall mold, and a split mold device, a claw is attached to the upper end of the tire vulcanizer. a split-metal type operating cylinder having a bayonet lock fixed upwardly to the upper bead ring, a holder facing the bayonet lock in a butting state, and a bayonet pawl engaging the pawl of the bayonet lock; A split mold type opening/closing device for a tire vulcanizer, characterized by comprising an engagement/disengagement means for engaging/disengaging.