JPH0356162B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulic tire vulcanizing press that clamps a mold through an elevating table that is connected to an upper mold by a hydraulic cylinder and constitutes an upper mold portion. It is.

In the conventional tire curing press mentioned above, in order to carry the vulcanized tire into the mold, the stroke of the elevating table is approximately 1000 mm in the case of a passenger car tire press, and approximately 1,000 mm in the case of a truck and bus tire press. 2000 mm, and the stroke of the hydraulic cylinder that tightens the mold is made correspondingly long, so if a pressure drop occurs due to a seal leak in the hydraulic line of the hydraulic cylinder during tire vulcanization, the upper and lower molds will be damaged. Conventionally, there was a risk that the gap at the mating surfaces of the mold would exceed the opening limit, causing the vulcanizing medium (steam, high-pressure hot water, high-temperature, high-pressure gas) inside the mold to blow out to the outside. To achieve this, high-cost parts such as bleach lock rings were used, and devices such as hydraulic pressure control using pressure switches were installed, but these devices were not necessarily effective as a means of eliminating the gap between the upper and lower molds. I can't say it's optimal.

The present invention also solves the above-mentioned difficulties in conventional tire vulcanizing presses, and includes an upper frame and a lower frame connected by a side frame,
In a tire vulcanizing press in which an upper mold part is arranged between the upper frame and the lower frame so as to be able to move up and down, a pressure cylinder and a spacer are arranged between the upper frame and the upper mold part, and the pressurization Either the cylinder or the spacer is movable to a position outside the side frame so as not to obstruct the lifting and lowering of the upper mold part, and rotated to either the upper frame part or the lower frame part. A nut freely mounted, a gear fixed to one end of the nut, a gear meshing with the gear and driven by a drive device, a threaded rod meshing with the nut and having an arm at one end, and a gear of the threaded rod. The present invention is characterized in that a mold thickness adjusting means is provided, which includes a rod fixed to the arm of the rotation stopper, and a guide bearing for the rod fixed to the frame, A pressurizing cylinder, a spacer, and a jammer plate are disposed between the mold parts, and the jammer plate is movable to a position outside the side frame so as not to obstruct the lifting and lowering of the upper mold part, and the a nut rotatably mounted on either the upper frame portion or the lower frame portion; a gear fixed to one end of the nut; a gear meshing with the gear and driven by a drive device; A mold thickness adjusting means is provided, which comprises a threaded rod having an arm at one end of the threaded rod, a rod fixed to the arm to prevent rotation of the threaded rod, and a guide bearing for the rod fixed to the frame. The objective is to provide a tire vulcanizing press that is highly safe and inexpensive and can mechanically prevent the mold from opening.

The present invention has the above-described configuration, and a pressure cylinder and a spacer are arranged between the upper press frame and the upper mold part, and the pressure of the pressure cylinder is transmitted to the mold. Since the pressurization reaction force receiving portion on the upper frame side or the lower frame side can be adjusted in response to variations in mold thickness, the pressurization cylinder, spacer, metal It is possible to pressurize after eliminating the gap between the molds, and even if the pressure inside the pressurizing cylinder decreases due to a malfunction, etc., it has the advantage that the mold will not open by more than the amount of elongation due to pressurization of the press frame. This does not result in the sulfur medium being ejected, and as mentioned above, the tightening stroke of the pressurizing cylinder only needs to be extremely short to compensate for the elongation of the press frame, and the mold can be tightened immediately.
And it can be done accurately.

In addition, the present invention makes the jammer plate movable, so that the pressure cylinder is movable.
Damage to the hydraulic pressure supply hose can be prevented, and compared to the spacer that moves, the spacer can be moved easily.
Since the vertically long spacer becomes a jama plate,
The spacer can be fixed to the upper mold part, which has the advantage of improving workability.

Hereinafter, the present invention will be explained based on examples.

FIG. 1 shows a first embodiment, which is a frame-type tire vulcanizing press in which an upper frame 1 and a lower frame 2 of the vulcanizing press are connected by a side frame 3. The lower mold 4 is fixed to the lower frame 2, and the upper mold 5 is fixed to the lifting table 6.
is separated from the lower mold part 4, and a pressure cylinder 7 and a spacer 8 are arranged between the upper frame 1 and the lifting table 6.

a nut 11 rotatably mounted on the upper frame 1; a gear 12 fixed to one end of the nut 11;
A gear 14 that meshes with the gear 12 and is driven by a drive device 13 mounted at a proper position on the upper frame 1, a threaded rod 16 that meshes with the nut 11 and has an arm 15 at one end, and the arm that prevents rotation of the threaded rod 16. 15, a guide bearing 1 for said rod 17 fixed in place on the upper frame 1;
8 constitutes a mold thickness adjusting means 10.

A pressurizing cylinder 7 is fixed below the mold thickness adjusting means 10, and a rod portion of the pressurizing cylinder 7 projects downward.

A spacer 8 is mounted on an elevating table 6 which is guided and raised and lowered by a suitable means on the side frame 3 so as to be able to swing freely on the elevating table 6. The swinging portion of the spacer 8 is mounted in a floating state in the axial direction, and is allowed to move in the axial direction of the press.

According to this structure, after the lifting table 6 is lowered to close the upper and lower molds 4 and 5, the spacer 8
After entering the center of the press from the outer position of the side frame 3, the screw rod 16 is lowered by the drive device 13, and the rod portion of the pressurizing cylinder 7 before pressurization is brought into contact with the head of the spacer 8. In this case, the gap between the upper and lower portions of the spacer 8 is zero.

After that, if a predetermined pressure is applied with the pressure cylinder 7, the pressure will be applied to the upper mold 5 through the spacer 8.
In the unlikely event that the pressure cylinder 7 is
Even if the hydraulic pressure inside decreases, the amount of opening between the upper and lower molds 4 and 5 becomes extremely small, and accidents such as ejection of vulcanizing medium can be prevented. Conversely, after vulcanization is completed, the pressurizing force of the pressurizing cylinder 7 is released, the mold thickness adjusting means 10 is slightly operated to create a gap large enough to allow the spacer 8 to move, and then the spacer 8 is moved to the side frame 3. If the lift table 6 is swung outward to a position where it does not interfere with the upper frame 1, pressurizing cylinder 7, etc. disposed above, the lifting table 6 will move upward and the vulcanized tire can be taken out.

2 and 3 show a second embodiment, and the same parts as in the first embodiment are given the same reference numbers, and only the points different from the first embodiment will be explained here.

In the first embodiment, the pressurizing cylinder 7 is fixed to the mold thickness adjusting means 10, but in this example, it is swingable on the mold thickness adjusting means 10. or,
The spacer 8 is fixed to the lifting table 6, and the threaded rod 1 is arranged in an upward extending direction.
6 has a hole larger than the outer diameter of the spacer 8. The pressurizing cylinder 7 has a diameter larger than that of the hole, and is mounted on the mold thickness adjusting means 10 as shown in FIG. 3.

That is, one of the rotation stopper rods 17 mounted on the arm 15 is hollow;
A rod 19 penetrates the inside of the pressurizing cylinder 7.
The support arm 20 of is suspended. The support arm 2
The rod 19 is movable in the axial direction by the gap between the pressurizing cylinder 7 and the threaded rod 16.
will be mounted on. Further, the rod 19 has a collar in the middle, and is mounted on the hollow rod 17. A key groove 19a is provided in the upper end of the rod 19 in the axial direction.
It has a gear 22 rotatably mounted at a suitable position on the upper frame 1, which has a key 21 meshed with the keyway 19a. Same gear 2
A gear 24 driven by a drive device 23 fixed at a proper position on the upper frame 1 is meshed with the gear 2 .

Therefore, even if the position of the threaded rod 16 is moved by the drive device 13, the pressurizing cylinder 7 is moved while the rod 19 on which it is suspended maintains its relative relationship with the arm 15. Since the pressurizing cylinder 7 is movable in the vertical direction, it does not interfere with pressurizing. Moreover, the pressurizing cylinder 7 can be swung by the drive device 23 regardless of the position of the threaded rod 16.

In this example, the pressurizing cylinder 7 is moved instead of the spacer 8 in the first example, and the operation and effect are almost the same as in the first example. This is effective when a space for storing a central mechanism for vulcanization work is required in the center of the cylinder 6, and the structure as in the first embodiment cannot be used.

FIG. 4 shows a third embodiment, and in this embodiment, a spacer 8 is fixed to the lifting table 6, whereas the pressurizing cylinder 7 is oscillated in the second embodiment, and the upper end of the spacer 8 is A pressurizing cylinder 7 is fixed to the pressurizing cylinder 7, and a swingable jammer plate 9 is interposed between the pressurizing cylinder 7 and the threaded rod 16.
In this example, in addition to obtaining the effects of the second example, when the pressurizing cylinder 7 is oscillated in the upper part of the press in the second example, there is a risk of damage to the hydraulic pressure supply hose. However, this example is suitable for preventing this. FIG. 5 shows a fourth embodiment, and this embodiment is equipped with a jammer plate 9 like the third embodiment, but differs in that the pressure cylinder 7 is shaped like a donut and is fixed to a threaded rod 16. However, the operation and effect are the same as in the third embodiment.

The present invention has been described above based on the first to fourth embodiments. In each of these embodiments, the spacer 8, the pressurizing cylinder 7, etc. are arranged in the center of the press, but multiple sets may be used as necessary. Alternatively, the mold thickness adjusting means 10 is installed in the upper frame 1, but the pressurizing cylinder 7, spacer 8, jammer plate 9, etc. are placed on the upper part to adjust the mold thickness. Needless to say, it is also possible to interpose the means 10 between the lower mold 4 and the lower frame 2.

[Brief explanation of drawings]

Figures 1, 2, and 4 are front views of the first, second, and third embodiments, respectively; Figure 3 is an enlarged view of a portion of Figure 2; and Figure 5 is the fourth embodiment. This is an enlarged view of the main parts. 1... Upper frame, 2... Lower frame, 3... Side frame, 4... Lower mold, 5... Upper mold, 6... Lifting table, 7... Pressure cylinder, 8... Spacer, 9... Jammer plate, 10... Gold Mold thickness adjustment means.

Claims (1)

[Scope of Claims] 1. A tire vulcanizing press in which an upper frame and a lower frame are connected by a side frame, and an upper mold part is disposed between the upper frame and the lower frame so as to be movable up and down. A pressurizing cylinder and a spacer are arranged between the upper mold parts, and either the pressurizing cylinder or the spacer is moved to a position outside the side frame so as not to obstruct the lifting and lowering of the upper mold part. A nut that is movable and rotatably mounted on either the upper frame or the lower frame, a gear fixed to one end of the nut, and a gear that meshes with the gear and is driven by a drive device; A mold thickness adjusting means comprising a threaded rod that engages with the nut and has an arm at one end, a rod fixed to the arm to prevent rotation of the threaded rod, and a guide bearing for the rod fixed to the frame. A tire vulcanizing press characterized by: 2. In a tire curing press in which an upper frame and a lower frame are connected by a side frame, and an upper mold part is disposed between the upper frame and the lower frame so as to be freely raised and lowered, there is a space between the upper frame and the upper mold part. A pressurizing cylinder, a spacer, and a jammer plate are arranged in the upper frame or the lower frame, and the jammer plate is movable to a position outside the side frame so as not to obstruct the lifting and lowering of the upper mold part. A nut rotatably mounted on either side, a gear fixed to one end of the nut, a gear meshing with the gear and driven by a drive device, and a threaded rod meshing with the nut and having an arm at one end. and a mold thickness adjusting means comprising a rod fixed to the arm of a rotation stopper of the same threaded rod, and a guide bearing for the rod fixed to the frame. .