JPS5947982B2 - tire vulcanizer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a tire vulcanizer in which a bladder is once drawn into an outer cylinder mounted inside a base after vulcanization is completed.

This kind of tire vulcanizer has a conventional stock of 52-37518
As shown in the publication, a hydraulic sill was used to move the center post up and down.

For this reason, the structure becomes complicated and the height of the base becomes high, which poses problems in terms of economy and maintainability.

In addition, it is particularly necessary to attach a gasket to the bladder lower end holding member for holding the center post and the lower end of the bladder to prevent leakage of the vulcanizing heat medium, which is troublesome to maintain.

Further, when an existing tire vulcanizing machine is modified into a tire vulcanizing machine of the type described above in which the bladder is temporarily drawn into an outer cylinder (storage cylinder), significant modification is required.

The present invention has been proposed in order to address the above-mentioned problems, and includes a tire vulcanizer that temporarily draws a bladder into an outer cylinder disposed inside a base after completion of vulcanization, at the lower end of the bladder. a bladder lower end holding member that holds the bladder and is mounted in the outer cylinder so as to be vertically movable relative to the outer cylinder; and a pressure receiving plate mounted so as to transmit a downward force on the bladder lower end holding member due to the internal pressure of the bladder during vulcanization to the base via the outer cylinder, the bladder lower end holding member The center post and outer cylinder are assembled into the base as a set, and then the pressure receiving plate is installed.
The purpose is to have a simple structure, excellent maintainability, and to be able to convert an existing tire vulcanizer into a type that pulls the shibrader into the outer cylinder with minimal modifications. The aim is to provide a tire vulcanizer that can.

Since the present invention is configured as described above, the center post can be lowered by its own weight by opening the interior of the bladder to the atmosphere after vulcanization, and a fluid pressure cylinder is not required.

Furthermore, since there is no need for a sealing gasket between the center post and the bladder lower end holding member, the structure is simplified and maintenance is facilitated.

In addition, by removing the pressure plate, when the press is opened, the outer cylinder etc. can be lifted out or hung above the base in the assembled kit state, making it possible to minimize the use of existing tire vulcanizers. With limited modification, it can be made into a tire vulcanizer with a central mechanism that pulls the bladder into the outer cylinder.

Hereinafter, the present invention will be explained based on illustrated embodiments.

1 is a beam, 2 is an upper heating plate fixed to the beam 1 via a heat insulating plate (not shown), 3 is a base, 4 is a lower heating plate fixed to the base 3 via a heat insulating plate (not shown), 5 is a The upper mold 6 is attached to the upper hot plate 2, and the lower mold 6 is attached to the lower hot plate 4. The upper and lower molds 5 and 6 are opened using a mechanical clamp mechanism (not shown), or , closed and pressurized.

Reference numeral 7 designates a bladder, whose upper center is inserted into the upper end recess of the center post 8 and clamped by a presser fitting 9 via a bolt 10, and whose lower end is connected to the lower ring 11 and the inner cylinder 1.
It is held between 2.

A threaded hole is provided at the lower end of the lower ring 11, and a threaded rod 15 is screwed into this hole, so that the center 7 flange of the threaded rod 15 is inserted into the disk 13 fixed to the lower end of the inner cylinder 12 and the presser metal fitting 14. By rotationally tightening the threaded rod 15, the lower end of the bladder T is held between the lower ring 11 and the inner cylinder 12, thereby forming a bladder lower end holding member.

The tire T in the upper mold 5 and the lower mold 6 is heated from the outside by the upper hot plate 2 and the lower hot plate 4 via the stopper mold 5 and the lower mold 6.

On the other hand, the bladder 7 is heated by the pressure heat medium injected from the plurality of nozzles 16 through the pipe 18 and the passage 17 in the lower ring 11.
It is pressed onto the inner surfaces of the upper mold 5 and the lower mold 6 via the molds 5 and 6, and is simultaneously heated and vulcanized from the inside.

Note that the heat medium is discharged through a pipe 20 connected to the nozzle 19.

The center post 8 has a hole 23 provided in the lower ring 11.
The hole 23 of the lower ring 11 and the inside of the bladder 7 communicate with each other through a communicating hole provided in the center post 8. 21.

24 is an outer cylinder 24 suspended from the lower heating plate 4;
A fluid pressure cylinder 27 is attached to the lower surface of the bottom plate, and the tip of the piston rod 25 of this fluid pressure cylinder 27 is
The inner cylinder 12, which is screwed into the inner cylinder 12, can be moved up and down within the outer cylinder 24 by the operation of the hydraulic cylinder 27.

28 is a pressure receiving plate interposed between the upper surface of the bottom plate of the outer cylinder 24 and the notch 26 provided at the lower part of the inner cylinder 12, and the pressure receiving plate 28 applies the downward force of the pressure heat medium supplied into the bladder 7 to the outer cylinder 24. It is meant to be conveyed.

The pressure receiving plate 28 is attached to the U-shaped bracket 2 as shown in FIG.
9, and this bracket 29 is fixed to the bracket plate 32.
By connecting to the tip of the piston rod 31 of the hydraulic cylinder 30 mounted on the base 33 via the hydraulic cylinder 30, the hydraulic cylinder 30 can be moved back from the intervening position by operating the hydraulic cylinder 30.

A box 33 has a square hole into which the lower corner of the threaded rod 15 is inserted, and is attached to the lower surface of the base 3 via a bearing 34, and a chain wheel 35 fixed to the lower end is driven by a known driving means (not shown). When rotated through the chain 36, the threaded rod 15 rotates and the lower ring 11 moves up and down.

Reference numeral 39 denotes a known tire taking-out chuck attached to the lower end of the ejector 38, and has a structure in which the sector 40 can be expanded and contracted in the radial direction by the vertical movement of the ram 37.

Next, the effect will be explained.

It is assumed that vulcanization has been completed in the state shown in FIG. 1, and in this state, the pressure heat medium is discharged from the nozzle 19 via the pipe 20 and then opened to the atmosphere to bring the inside of the bladder 7 to atmospheric pressure.

Then, when the ram 37 is lowered, the sector 40 opens and holds the tire T, and the center post 8 is pushed down.
The bladder 7 is torn off from above the tire T.

Next, the fluid pressure cylinder 27 is activated to slightly raise the inner cylinder 12 to peel off the bladder 7 from below the tire T, the fluid pressure cylinder 30 is activated to move the pressure receiving plate 28 backward, and then the fluid pressure cylinder 27 is operated in the opposite direction to lower the inner tube 12, thereby drawing the bladder 7 into the outer tube 24 once.

At this time, the center post 8 descends due to its own weight.

When the press is opened and the vulcanized tire T is taken out, the next raw tire to be vulcanized is brought in, the fluid pressure cylinder 27 is activated, the inner cylinder 12 is raised, and the bladder 7 is removed from the tire. Insert into T.

Next, the fluid pressure cylinder 30 is operated to interpose the pressure receiving plate 28 below the notch surface 26, and then the fluid pressure cylinder 27
is operated in reverse to seat the cutout surface 26 on the pressure receiving plate 28, and the press enters a process of closing, starting saving vulcanization of the tire T.

As mentioned above, when the bladder 7 is retracted and stored, the inside of the bladder 7 is opened to the atmosphere, and the upper and lower parts of the bladder 7 are peeled off from the tire T, so that the center post 8 is lowered by its own weight. A fluid pressure cylinder for lowering the post 8 is not required, and the structure can be simplified.

Therefore, there is no need for a seal gasket in the center post guide portion, and problems of leakage and replacement due to wear of the gasket are eliminated, making maintenance easier.

Moreover, if the pressure receiving plate 28 and a part of the piping 18 are removed,
When the press is opened, the outer cylinder 24 etc. are assembled as a kit.
With t, it is possible to suspend and hang from above the base 3.
Although it has a structure in which the downward pushing force due to the internal pressure of the bladder 7 is supported by the lower heating plate 4 or the base 3, and the outer cylinder 24 etc. can be assembled into the base 3 as a kit, the kit base 3 After suspending the bladder into the outer cylinder 24, the pressure receiving plate 28, fluid pressure cylinder 27, etc. can be easily assembled. It can be modified to a type of tire vulcanizer with a mechanism.

In the above embodiment, the pressure receiving plate 28 is moved linearly to the notch surface 2.
Although it is installed below 6 or moved backward, it can also be swung.

In the above embodiment, the hydraulic cylinder 30 is assembled to the base 3 via the bracket plate 32, or it can also be assembled to the outer cylinder 24.

Further, in the above embodiment, the present invention is applied to a tire vulcanizer of the type having a chuck 39 for taking out the tire, but instead of suspending the outer cylinder 24 from the lower hot plate 4,
'The rear end of a fluid pressure cylinder, which is suspended from the lower mold 6 by a known method and the tip of the piston rod is fixed to the lower surface of the outer cylinder 24, is bolted to the base 3, and the outer cylinder 24 is tightened by the operation of the fluid pressure cylinder. The present invention can also be implemented in a type of tire vulcanizer that does not have a chuck for taking out tires by making it possible to move up and down.

In this case, by raising the outer cylinder 24 instead of lowering the inner cylinder 12, the bladder 7 is relatively drawn into the outer cylinder 24, so instead of fixing the fluid pressure cylinder 27 to the outer cylinder 24, In some cases, the stroke of the fluid pressure cylinder 27 can be made smaller by tightening the bolt to the base 3 via a bracket.

In addition, although the above embodiment has been explained using a platen type tire vulcanizer as an example, it can be similarly applied to a dome type tire vulcanizer.

However, in this case, a gasket is required between the lower ring 11 and the center post 8, and the communication hole 21 in the center post 8 is required.
communicates with a drain hole opened in the bladder 7,
A pipe for guiding the drain out of the machine from the hole 23 is required, and a notch for this purpose is provided in the small diameter cylindrical portion of the inner cylinder 12.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
FIG. 3 is a sectional view. 3...Base, 7...Blada, 8...
...Center post, 11...Lower ring,
12...Inner cylinder, 24...Outer cylinder, 28.
...Pressure plate, T...Tire.

Claims (1)

[Claims] 1. In a tire vulcanizer in which a bladder is temporarily drawn into an outer cylinder disposed inside a base after vulcanization is completed, the lower end of the bladder is held and the bladder is moved up and down relative to the outer cylinder into the outer cylinder. a bladder lower end holding member which is attached to the bladder lower end holding member, a center post which holds the upper end of the bladder and is housed and held in the bladder lower end holding member so as to be able to move vertically, and the bladder lower end holding member which is supported by internal pressure of the bladder during vulcanization. and a pressure receiving plate attached to transmit the downward pushing force of the body to the base via the outer cylinder, and after the bladder lower end holding member, center post, and outer cylinder are assembled into the base as a set, the pressure receiving plate is installed. A tire vulcanizing machine characterized by incorporating.