JPS6046212A - Tyre vulcanizer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

This type of tire vulcanizer is conventionally manufactured by the Japanese Patent Publication No. 52-3751.
As shown in Publication No. 8, a fluid pressure cylinder 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.

Also. In particular, it is necessary to install packing to prevent the leakage of the vulcanizing heating medium to the center post and the bladder bottom end holding member that holds the bottom end of the bladder. Maintenance of this was troublesome.

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 was proposed in order to address the above-mentioned problems, and includes a tire vulcanizer in which the bladder is temporarily drawn into the removable part 1 disposed inside the base after vulcanization is completed.
A bladder lower end holding member that holds the lower end of the plug, a center post that holds the upper end of the bladder, and the downward pushing force of the bladder lower end holding member due to the internal pressure of the bladder during vulcanization is transmitted through the outer cylinder. and a pressure receiving plate attached to transmit the pressure to the base, and the pressure receiving plate is incorporated after the bladder lower end holding member, center post and outer cylinder are assembled into the heath as a set,
The purpose of this is to have a simple structure, excellent maintainability, and to be able to convert an existing tire vulcanizer into a type that temporarily draws the bladder into the outer cylinder with minimal modification. The purpose is to provide a tire vulcanizer.

The present invention is. With the structure described above, after vulcanization is completed, the center post can be lowered by its own weight by opening the inside of the bladder to the atmosphere. No need for a fluid pressure cylinder. Moreover, there is no need for a sealing pad between the center pot and the bladder lower end holding member.
The structure is simplified and maintenance becomes easier.

Also, by removing the pressure plate. When the press is opened, the outer cylinder, etc. can be lifted out or suspended above the base in its assembled state, with minimal modifications to the existing tire vulcanizer. It can be made into a tire vulcanizer with a central mechanism that draws the bladder into the outer cylinder.

below. The present invention will be explained based on illustrated embodiments.

1 is a beam, and 2 is an upper heating plate fixed to beam 1 via a heat insulating plate (not shown). 3 is a base, and 4 is a lower heating plate fixed to the base 3 via a heat insulating plate (not shown). 5 is an upper mold attached to the upper heating plate 2, 6 is a lower mold attached to the lower heating plate 4, and the upper and lower molds 5 and 6 have a mechanical lamp mechanism (not shown). It is designed to be pressurized to open or close.

Reference numeral 7 designates a bladder, the upper center of which is inserted into the recess at the upper end of the center post 8, and is supported by being tightened by a presser metal fitting 9 via a bolt 10, and the lower end is connected to a lower ring 11 and an inner cylinder 1.
It is supported between 2. At the lower end of the lower ring l1,
A screw hole is provided, and a screw rod 15 is screwed into this hole. The central flange of the threaded rod 15 is held loosely within a disc 13 and a presser fitting 14 fixed to the lower end of the inner cylinder 12. By rotating and tightening the threaded rod 15, the lower end of the bladder 7 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 upper mold 5 and the lower mold 6. On the other hand, the pressure heat medium injected from the plurality of nozzles 16 through the piping 18 and the passage 17 in the lower ring 11 is pressed against the inner surfaces of the upper mold 5 and the lower mold 6 via the bladder 7, and is simultaneously heated from the inside. It is then vulcanized and molded. 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 1l and the inside of the bladder 7 communicate with each other through a hole 22 provided in the center post 8. The holes 21 communicate with each other.

24 is an outer cylinder 24 which is hung and attached to the bottom heat handler 4.
A fluid pressure cylinder 27 is attached to the lower surface of the bottom slope, and the tip of the piston rod 25 of this fluid pressure cylinder 27 is
The inner cylinder 12 is screwed into the inner cylinder 12, and the inner cylinder 12 can be moved up and down within the outer cylinder 24 by the operation of a hydraulic cylinder 27. Reference numeral 28 denotes a notch 2 provided on the upper surface of the bottom plate of the outer cylinder 24 and the lower part of the inner cylinder 12.
This is a pressure receiving plate interposed between the bladder 7 and the pressure receiving plate 6, which transmits the downward force of the pressure heat medium supplied into the bladder 7 to the outer cylinder 24. As shown in FIG. 2, the pressure receiving plate 28 is fixed to a U-shaped bracket 29, and this bracket 29 is connected to the tip of a piston rod 31 of a fluid pressure cylinder 30 mounted on a base 33 via a bracket plate 32. By. By operating the fluid pressure cylinder 30, it can be moved back from the intervening position.

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 heath 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 the chain 36 is rotated by meeting. The threaded rod 15 rotates, and the lower ring 11 moves up and down.

39 is. A well-known tire ejection chuck is attached to the lower end of the ejector 38, and the sector 40 can be expanded and contracted in the radial direction by vertical movement of the ram 37.

Next, the effect will be explained.

It is assumed that vulcanization is completed in the state shown in the first time, and in this state, the pressure heat medium is discharged from the nozzle 19 through the pipe 20, and then it is opened to the atmosphere, and the inside of the Prada 7 is brought to atmospheric pressure.

After that, when the ram 37 is lowered. Sector 4o opens and holds tie-1-T. The center post 8 is pushed down and the bladder 7 is pulled off from above the tire T. Next, the fluid pressure cylinder 27 is activated to raise the inner cylinder 12, and the bladder 7 is peeled off from below the tie T, and the fluid pressure cylinder 3o is activated to move the pressure receiving plate 28 backward. By operating the fluid pressure cylinder 27 in the reverse direction and lowering the inner cylinder 12, the Prada 7 is once drawn into the outer cylinder 24. At this time, the center post 8 descends due to its own weight.

Once the press is opened and the vulcanized tire T is taken out, a green tire to be vulcanized is carried in next, the fluid pressure cylinder 27 is activated, the inner cylinder 12 is raised, and the bladder 7 is moved inside the tire T. Insert into. 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 the reverse direction to seat the cutout surface 26 on the pressure receiving plate 28, and the process of closing the press begins to begin sapping vulcanization of the tire T.

As mentioned above, when the bladder 7 is pulled in and stored, the bladder 7
By opening the interior to the atmosphere and peeling off the upper and lower parts of the bladder 7 from the tire T, the center post 8 is lowered by its own weight, eliminating the need for a fluid pressure cylinder for lowering the center post 8, simplifying the structure. can be converted into Therefore. There is no need for a seal pad in the center post guide, eliminating problems with leaks and replacement due to wear of the pad, making maintenance easier.

Also, if you remove part of the pressure receiving plate 28 and the piping 18.
When the press is opened, the outer cylinder 24, etc., can be hung from above the base 3 while still being assembled.
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 heath 3, and the outer cylinder 24 etc. can be assembled into the base 3 in an assembled state, After hanging the kit into Heath 3. The pressure receiving plate 28, fluid pressure cylinder 27, etc. can be easily assembled. By making minimal modifications to the existing tire vulcanizer. It can be modified to a type of tire vulcanizer that has a central mechanism that once draws the bladder into the outer cylinder 24.

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

Also, in the above example. Although the fluid pressure cylinder 30 is assembled to the heath 3 via the bracket plate 32, it can also be assembled to the outer cylinder 24.

Further, in the above embodiment, the present invention was applied to a tire vulcanizer of the type having a tire ejection chuck 39, but instead of suspending the outer cylinder 24 from the lower heating plate 4, a known method was used. The rear end of a fluid pressure cylinder, which is suspended from the lower mold 6 and has the tip of a piston rod fixed to the lower surface of the outer cylinder 24, is bolted to the base 3, and the outer cylinder 24 can be raised and lowered by the operation of the fluid pressure cylinder. By doing so, the present invention can be implemented even in a type of tire vulcanizing machine that does not have a chimney for taking out tires. 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, the base In some cases, the stroke of the fluid pressure cylinder 27 can be made smaller by tightening the bolt through the plaquesso 1.

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 pasokin is required between the lower ring ■1 and the center boss 8. Communication hole 21 in center post 8
is communicated with the drain hole opened in Prada 7,
Piping is required to lead the drain out of the machine through the hole 23, and a notch for this purpose is provided in the small diameter cylindrical portion of the inner cylinder 12.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
FIG. 3 is a sectional view. 3...Base. 7. Bladder, 8. Center post, 11. Lower ring, 12. Inner cylinder, 24. Outer cylinder, 28. Pressure plate, T. Tire 591.

Claims (1)

[Claims] A bladder lower end holding member that holds the lower end of the bladder in a tire vulcanizer that temporarily draws the bladder into an outer cylinder disposed inside the tire after vulcanization is completed. a center post that holds the upper end of the bladder, and a pressure receiving plate that is installed so as to transmit the downward force of the bladder lower end holding portion holder due to the inside of the bladder during vulcanization to the heath via the outer cylinder. A tire vulcanizer, characterized in that the plug lower end holding member, the center post, and the outer cylinder are assembled into the base as a centrifuge, and then the pressure receiving plate is incorporated.