JPS62212106A - Vulcanizing device - Google Patents

Abstract

PURPOSE:To miniaturize the device by reducing the height of a vessel member and at the same time reduce the amount of pressurizing fluid by a method wherein the discharging of the pressurizing fluid from a chamber is done by evacuation. CONSTITUTION:When the vulcanization of a tire 22 comes to an end, pressurizing fluid in the chamber 28 of a back well 30 is released through the changing- over action of a fluid supplying and carrying-off means 34 and at the same time a bladder 26 is deformed from the shape indicated in the figure (a) to that indicated in the figure (b) in the state that a ram 48 is a little lowered. At this time, the fluid supplying a carrying-off means 34 connects the chamber 28 with a negative pressure source so as to evacuate the chamber 28 in order to deform the bladder 26 in the shape folded halfway as indicated in the figure (d) and housed in the chamber 28 by sucking the pressurizing fluid in such a manner as indicated with the arrow in the figure (c). Thus, no descent of the ram 48 by longer stroke is necessary and the height of the back well 30 can be reduced; consequently, a device can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vulcanizing device, and more particularly, to an improvement in a container for housing a vulcanizing bladder used in a vulcanizing device for vulcanizing pneumatic tires.

(Prior Art) As a conventional vulcanizing device, there is one shown in FIG. The vulcanizing device 1 shown in the figure has upper and lower vulcanizing molds 3 for storing a tire 2, and a bag-shaped bladder 5 arranged so as to be able to be stored inside the tire 2, as shown by the two-dot chain line in the figure. are doing. A cylindrical bank well 7 is provided at the lower center of the vulcanizing device 1 to temporarily accommodate a bladder 5 when the tire is replaced with an unvulcanized tire after vulcanization. The open end 5a of the bladder 5 is clamped and fixed between the upper end 7a of the backwell 7 and a ring-shaped bladder ring 9 disposed outside of the upper end 7a. There is a back well 7 in the upper center of the vulcanizer 1.
It has a cylindrical ram 11 that can be raised or lowered along its central axis. After the tire 2 is cured, the high temperature and high pressure pressurized fluid (e.g. steam and gas) in the bladder 5 is discharged through the tube 13 at the bottom of the backwell 7. Next, the vulcanized tire 2 is taken out, and the ram 11 is lowered so that the green tire to be vulcanized next can be inserted into the vulcanization mold 3, and the lower end 11a of the ram 11 closes the center of the bladder 5. Press the portion 5b downward, turn the bladder 5 upside down and lower it to near the bottom 7b of the backwell 7, and store it in the backwell 7, as shown by the solid line in the figure or as shown in FIG. .

(Problem to be Solved by the Invention) However, the ram 11 does not fit into the bladder after the tire is vulcanized.
It is necessary to lower the central closing part 5b of 5 in a long stroke from the position shown by the two-dot chain line to a position near the upper part of the bottom part 7b of the backwell 7, and then pressurize the inside of the backwell 7 after installing the unvulcanized tire. Ram 1 again to introduce fluid
1 must be raised in a long stroke. For this reason, there is a problem in that the height of the backwell 7 increases in order to accommodate the long stroke, resulting in an increase in the size of the device.

Furthermore, when vulcanizing a tire, a high-temperature, high-pressure heat medium such as steam or gas is used not only in the space 15 inside the bladder 5 housed in the green tire 2 but also in the opening 5a of the bladder 5. Since the inside of the large communicating well 7 has to be filled, there is a problem that the amount of heat medium used increases and the loss of this heat energy is large. .

(Means for Solving the Problems) In order to solve these problems, the vulcanization device according to the present invention includes a vulcanization mold that stores a tire, and an opening that is arranged so as to be stored in the tire. A bag-like member, a container member having a chamber that communicates with the opening of the bag-like member and is capable of accommodating the bag-like member, and a fluid that communicates with the chamber of the container member and supplies and discharges pressurized fluid to the room. and a supply/discharge means, wherein the fluid supply/discharge means discharges the pressurized fluid from the chamber by vacuum suction, and the bag-like member is folded and stored in the chamber. .

(Function) In the vulcanizing device according to the present invention, after the tire is vulcanized, the fluid supply/discharge means discharges the pressurized fluid from the chamber of the container member and the bag-like member communicating with the chamber. Since this is carried out by vacuum suction, the pressurized fluid is rapidly discharged from the chamber and the inside of the bag-like member due to the negative pressure of the vacuum suction, and the bag-like member is further deformed so as to be folded in the middle due to the negative pressure of the vacuum suction. do. Therefore, the bag-like member can be stored in the chamber without the need for the ram to descend through a long stroke as in the conventional case, and the height of the container member can be lowered to reduce its size. Further, by downsizing the container member, the amount of pressurized fluid required during vulcanization can be reduced, and the loss of thermal energy can also be reduced.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 to 3 are diagrams showing an embodiment of the vulcanization apparatus according to the present invention. In FIG. 1, 21 is a vulcanizing device, and this vulcanizing device 21 is equipped with a vulcanizing mold 24 in which a tire 22 is housed. A bladder ring 27 is provided on the center side of the vulcanization mold 24 of the vulcanization device 21, and a substantially cylindrical backwell (container member) 30 having a predetermined chamber 28 is provided inside the bladder ring 27 on the center side. It is provided. An open end 26b of a bladder (bag-like member) 26 having an opening 26a is clamped and fixed between the bladder ring 27 and the upper end 30b of the backwell 30, and the tire is fixed as shown by the two-dot chain line. It is arranged so that it can be stored within 22. Inside the chamber 28 of the backwell 3o, a filler 43 is housed on the bottom 30a via a spacer 44 to reduce the volume of the chamber 28.

Pipes 36 and 38 are connected to the sides of the backwell 30, and these vibes 36 and 38 are connected to a fluid supply/discharge means 34 for supplying or discharging pressurized fluid such as steam or inert gas into the chamber 28. ing. Fluid supply and discharge means 34
is connected to a pressurized fluid supply source, outside air, and a negative pressure source (not shown), and any one of them is connected to the backwell 3.
It is designed to alternatively communicate with room 28 of 0. The tip of a ram 48 contacts the central closing portion 26C of the bladder 26 from above, and the ram 48 moves up and down as the bladder 26 expands and contracts.

Next, the effect will be explained. After the tire 22 is cured, another green tire 22 is stored in the vulcanization mold 24, the ram 48 is raised, and the fluid supply/discharge means 34 is switched to supply pressurized fluid into the chamber 28 of the backwell 30. When supplied, the bladder 26 expands to press into the tire 22 and vulcanize the tire 22. When the vulcanization of the tire 22 is completed, the pressurized fluid in the chamber 28 of the backwell 30 is discharged to the outside air by the switching operation of the fluid supply/discharge means 34, and the pressure is lowered, and the ram 48 is lowered slightly to remove the fluid from the bladder.
26 deforms from the shape shown in FIG. 2 (al) to the shape shown in FIG.
8 descends, the bladder 26 assumes a shape as shown in FIG. 8(C). At this point, the fluid supply/discharge means 3
4 performs a switching operation, which now communicates the chamber 28 with a negative pressure source to discharge the pressurized fluid within the chamber 28 by vacuum suction. Therefore, the pressurized fluid is sucked in as shown by the arrow in FIG.
It is deformed so that it is folded in the middle as shown in the figure. At this time, the ram 48 descends to the lowest position and opens the bladder.
26 is stored in the room 28 in a folded state.

In this way, since the bladder 26 is folded midway and stored in the chamber 28 of the backwell 30, the ram 48 does not have to descend in a long stroke as in the conventional case (therefore, the depth of the chamber 28, i.e., the The height of the well 30 can be reduced, and the back well 30 can be made smaller.Also, by making the back well 30 smaller, the volume of the portion M28 can also be reduced. The amount of pressurized fluid supplied into chamber 28 and bladder 26 can also be minimized, and the loss of thermal energy thereof can also be minimized.

In the above embodiment, a case has been described in which the stuffing 43 whose upper surface is shaped to receive the bladder 26 is housed in the room 28, but such a stuffing 4
Instead of housing the back well 30, the bottom of the back well 30 may be made to have the same shape as the top surface of the padding 43, and the back well 30 may be installed on the floor with legs attached. Further, the stuffing 43 in the above embodiment can be replaced in various ways according to the sizes of the tire 22 and the bladder 26, and the tall stuffing 43 can be stored in a large backwell of a conventional room. It is also possible to easily improve the vulcanization equipment.

(Effects of the Invention) As explained above, according to the present invention, it is possible to reduce the storage depth of the bag-like member, that is, to reduce the height of the container member, and to reduce the size of the container member. The amount of pressurized fluid required can be reduced, thereby reducing the loss of thermal energy.

[Brief explanation of drawings]

1 to 3 are diagrams showing an embodiment of the vulcanization apparatus according to the present invention, FIG. 1 is a partial sectional view thereof, and FIGS. 2(a) to (
d) are half-sectional views showing the deformation of the bladder 26 in sequence when the pressurized fluid in the chamber 28 of the backwell 30 is discharged, and FIG. 3 shows the bladder 26 in the state shown in FIG. 2(d). A perspective view of the bladder ring 27 seen from above, FIG.
5 is a diagram showing a conventional vulcanizing device, FIG. 4 is a partial sectional view thereof, and FIG. FIG. 2 is a perspective view of the bladder 5 in a state seen from above the bladder ring 9; 21... Vulcanization device, 22... Tire, 24... Vulcanization mold, 26... Bladder (bag-shaped member), 26a...・
...Opening portion, 26b...Opening end, 26c...Central closing portion, 27...Bladder ring, 28...Room, 30. ...Backwell (container member), 30a.
...Bottom part, 30b...Top end part, 34...Fluid supply/discharge means, 36.38...Pipe, 43...Filling, 44 ...Spacer, 48...Ram.

Claims (1)

[Claims] A vulcanization mold for storing a tire, a bag-like member arranged to be stored in the tire and having an opening, and a container communicating with the opening of the bag-like member and having a chamber capable of storing the bag-like member. and a fluid supply/discharge means communicating with a chamber of the container member and supplying/discharging pressurized fluid to the chamber, the fluid supply/discharge means discharging the pressurized fluid from the chamber by vacuum suction. . A vulcanizing device characterized in that the bag-like member is folded and stored in the chamber.