JPS6229209Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a drain discharge device for a tire flow machine.

In dome-type heating type tire flow machines, etc., the steam inside the dome condenses and becomes condensate, which accumulates at the top of the vulcanizing bladder and leaks between the green tire and the bladder when the next green tire is vulcanized. This can lead to the production of defective tires.
Drain must be drained outside. A variety of such drain discharge devices have been proposed in the past, but in all cases they not only have a complicated structure, but also have the disadvantage that the steam inside the dome flows out together with the drain during tire injection. . Therefore, in order to eliminate the above-mentioned drawbacks, the applicant applied for the
-104422 (Utility Publication No. 53-12787) was proposed.
However, with this device, the drain pipe is connected to the lower end of the blind drain hole provided in the rod of the center cylinder, so if a large bladder is used, the center cylinder will be longer and a deeper pit will be required. The disadvantage was that it required digging.

The present invention was proposed in view of the above points, and includes an axial drain drain hole provided in the rod of the center cylinder, a drain drain passage provided in the lower ring, and a drain drain hole provided in the lower ring. A bladder holder that holds the bladder between an opening provided at the lower end and communicating with the drain passage of the lower ring only at the rod position when the tire is inflated, and an upper ring attached to the upper end of the rod and the same ring. and a drain passage provided in communication with each other and communicating with the blind drain hole of the rod to form a drain discharge passage, and a drain passage provided in the upper ring and the bladder holder is connected to the tire. The present invention is characterized by providing a means for opening the passage only when the tire flow machine is in use, and its purpose is to provide a drain discharge device for a tire flow machine that can reduce the size of the tire flow machine foundation pit.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

1 is the base body of the tire flow machine, 2 is the lower dome, 3 is the upper dome, 4 is the lower mold, 5 is the upper mold, 6
1 is a tire, 7 is a vulcanizing bladder inserted into the tire 6, 8 is an outer cylinder, 9 is an inner cylinder, 10 is a beam, 11
12 is an outer cylinder, 12 is a box, 13 is a stopper, 14 is a center cylinder, 15 is a rod of the center cylinder, 16 is a lower ring attached to the center cylinder 14 via a tie rod, 17 is a gasket 18 at the lower end of the rod 15. The upper ring 19 is attached by sandwiching the bladder 7 and is a bladder holder attached to the upper ring 17 by a bolt 20.
The lower end opening of the bladder 7 is clamped to the inner tube 9 by a lower ring 16. Reference numeral 21 denotes an axial drainage blind hole provided in the rod 15, 22 a drain passage provided in the lower ring 16, and the drain passage 22 includes a drain passage 23 having a drain trap (not shown). is connected. 24 is a hole provided at the lower end of the blind drain hole 21 and communicates with the drain passage 22 only in the rod position when the tire is injected; 25 is a scraper;
6 is a dust seal, 27 is a V packing presser, 28
is a V gasket, 29 is a U gasket, 30 is an adapter, 31 is a spacer, 32 is a C-shaped retaining ring, 33 is a drain hole provided in the bladder holder 19, 34
is a drain hole communicating with a drain hole 33 provided in the upper ring 17, and communicates with the drain hole 21 of the rod 15 via a check valve 35.
36 shows the steam inlet and outlet provided in the lower ring 16. In the above configuration, FIG. 2 shows a state in which the tire is being flooded, and the drain flowing into the upper part of the bladder presser 19 passes through the drain hole 33 and the drain hole 34 in the upper ring, and the check valve 35 is opened to remove the fluid from the rod 1.
The water enters the blind drain hole 21 of No. 5, and is discharged to the outside through the drain hole 24 provided at the lower end of the drain hole 21 through the drain drain passage 22 of the lower ring 16 and from the drain drain pipe 23. Here, since the drain drain pipe 23 is provided with a drain trap, steam will not flow out together with the drain.

On the other hand, FIG. 3 shows the state during bladder warming. When the pressure source of the center cylinder 14 is cut off and steam flows into the bladder 7 from the steam inlet/outlet 36, the rod 15 rises due to the pressure. Although the mouth hole 24 provided in the rod 15 opens into the bladder, the action of the check valve 35 prevents steam from leaking to the outside.

As described above, the top drain only needs to be discharged during tire flow, and as described above, the present invention provides a drain outlet that communicates with the mouth hole 24 of the blind hole 21 provided in the rod 15 only when the tire is flowed into the lower ring 16. Passage 2
2 and an upper ring 17 or bladder presser 1
Since the drain hole 34 or 33 of No. 9 is provided with a means such as a check valve 35 that opens the hole only when draining the drain, there is no leakage of steam to the outside, drain can be reliably drained, and a large bladder is used. In this case, the base pit can be made smaller even if the center cylinder becomes longer. In addition, even if the V-packet 28 etc. are worn out, the steam will be discharged to the drain passage, so leakage to the outside can be prevented.
It can have many effects.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is an enlarged cross-sectional view of the main part showing the state during tire heating, and FIG. 3 is a cross-sectional view showing the state during bladder warming. 14: Center cylinder, 15: Rod, 16: Lower ring, 17: Upper ring, 19: Bladder holder, 2
1: Drain drain blind hole, 22: Drain drain passage, 2
4: Mouth hole, 33, 34: Drain hole, 35: Check valve.

Claims (1)

[Scope of utility model registration request] An axial drain hole is provided in the rod of the center cylinder, a drain passage is provided in the lower ring, and a drain hole is provided at the lower end of the drain hole. A drain hole for the rod is provided in communication with a mouth hole that communicates with the drain passage of the lower ring, an upper ring attached to the upper end of the rod, and a bladder holder that clamps the bladder between the upper ring and the upper ring. A drain discharge passage is formed by a drain passage communicating with the blind hole, and the drain passage provided in the upper ring and the bladder holder is provided with means for opening the passage only during tire vulcanization. Drain discharge device for tire vulcanizer.