JPH03132306A - Apparatus for operating split mold of tire vulcanizing machine - Google Patents

Abstract

PURPOSE:To restrain the whole height of a vulcanizing machine by providing a split mold operating shaft in making it coaxially outwardly fit in a central mechanism coaxially and further providing a mold container on a lower platen and allowing the mold container and the split mold to go up and down relatively and thus moving the split mold to the diameter direction. CONSTITUTION:After a green tire 1 is inserted into a split mold 3 and then subjected to mold clamp, it is vulcanized in a state that a molding plug 2 is appended to the inner surface of the green tire 1. The vulcanized tire 1A is removed and thereafter, as an operating cylinder 52 is pushed up, respective split molds 6 which are dovetail-joined with respect to a lower mold 8 and the mold container 4 rise and open outwardly in the diameter direction and thus the tire 1A is disloged therefrom. After removing of the tire, when the operating cylinder 52 is actuated downwardly, the split mold 6 descends relatively with respect to the mold container 4 and, as a result, respective split molds 6 close in the diameter direction.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a split die operating device for a tire vulcanizer.

(Prior Art) In a tire vulcanizer, a split mold is used, which includes a mold container and a plurality of split molds in the circumferential direction in which a cough mold container is placed. There is a device in which the divided molds are opened and closed by raising and lowering the mold container and the divided molds relative to each other by raising and lowering them using an operating cylinder.

In this type of tire vulcanizing machine, the operating device for operating the split mold differs slightly depending on the structure of the split mold, but usually an operating shaft, an operating cylinder, etc. are provided in a position completely separate from the central mechanism. It is. For example, since there are tightening devices and other items on the lower platen side, in a machine equipped with a lower center mechanism, the operation shaft and operation cylinder are placed at the center position on the upper side of the vulcanizer, and the upper center mechanism , the operating shaft and operating cylinder are arranged on both the left and right sides.

(Problems to be Solved by the Invention) In the former case, the conventional operating device has the disadvantage that the vulcanizing machine body becomes vertically large, and in the latter case, the central mechanism and the operating device are located on the upper side. Due to the limited space available,
There was a drawback in that it was difficult to design when installing the operation shaft and the operation cylinder.

Moreover, since the operating device is disposed on the upper side, it is necessary to attach the split mold to the upper platen side, making it difficult to handle the split mold and posing problems in work safety.

In view of these points, the first object of the present invention is to provide an operating device that can be miniaturized and solve the unreasonable design problems. The second purpose is to provide an operating device that can perform the following functions.

(Means for Solving the Problems) The present invention, as a first means for achieving the above, divides a mold container 4 and a plurality of divided molds 6 arranged in the mold container 4 in the circumferential direction. In a tire vulcanizer equipped with a split mold 3 in which the split mold 6 is opened and closed in the radial direction by being relatively raised and lowered by a mold operation shaft 11, the split mold operation shaft 11 is connected to the central mechanism 30. The split mold operating shaft 11 is provided as a second means.
and the central mechanism 30 are arranged below the split mold 3,
A mold container 4 is provided on a lower platen 18, and a split mold 6 is provided on the upper end side of a split mold operating shaft 11.

(Function) When opening the split mold 3 and taking out a vulcanized tire, the split mold operating shaft 11 moves the mold container 4 and the split mold 6 up and down relatively, and the split mold 6 is moved up and down. Open radially outward.

Since the operating shaft 11 is externally fitted onto the central mechanism 30, the height of the entire vulcanizer is reduced, and it is also easy to design it in a narrow space.

Furthermore, if the operating shaft 11 and the central mechanism 30 are located on the lower side, the split mold 3 can be easily attached to the lower platen 18, making it easy to handle and work safely.

(Example) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In FIGS. 1 and 2, 1 is a green tire, and 2 is a molding bladder that is attached to the inner surface of the green tire 1 during vulcanization molding. Reference numeral 3 denotes a split mold, a mold container 4 having an inner circumferential surface formed in a tapered shape that spreads upward, a split mold 6 disposed inside the mold container 4 and divided into a plurality of pieces in the circumferential direction, and an upper part. Mold 7, lower mold 8, upper bead mold 9
and a lower bead mold 10.

Each split mold 6 is dovetail-fitted into a dovetail groove formed in the vertical direction on the inner surface of the mold container 4 so as to be relatively slidable vertically, and is dovetail-fitted in a dovetail groove formed in the radial direction in the lower mold 8. It is dovetail-fitted so that it can slide freely. Therefore, each split mold 6 has a lower mold 8.
If the mold container 4 is raised and lowered relative to the mold container 4, it can be opened and closed in the radial direction. The lower mold 8 is detachably fixed to the upper end of a split mold operating shaft 11 disposed below the center via a split mold lower plate 12 and a crumbling ring 13. The clamp ring 13 is fixed to the upper end of the operating shaft 11 with bolts 14, and has a plurality of clamp parts 15 on the outer periphery, and the clamp parts 15 are connected to the lower plate 1.
After fitting into the notch 16 of No. 2, by rotating the lower mold 8 by an angle θ, the clamp portion 15 is fitted into the lower mold 8.
and the lower plate 12 to fix the lower mold 8 to the operating shaft 11.

The mold container 4 is placed on the lower platen 18 via the lower ring 17 and is fixed to the lower platen 18 by T bolts 20 that engage with T grooves 19 formed radially in the lower platen 18. There is. Note that when assembling the split mold 3, the mold container 4, the split mold 6, the lower mold 8, etc. are sometimes assembled as a unit, so a guide 19a is placed on the lower platen 18 to guide the rotation of the lower ring 17. A rotating cylinder 21 is provided between the mounting bracket 21a fixed to the lower ring 17 and the lower platen 18, and the rotating cylinder 21 allows the mold container 4, the split mold 6, and the lower mold 8 to be connected to each other. etc., can be rotated.

The upper bead mold 9 is removably fixed to the upper mold 7 and the upper mold 7 to the upper platen 22 with bolts, and the upper platen 22 is provided with a plurality of mold height adjustment screw shafts 23 in the circumferential direction. is installed protrudingly. Each adjustment screw shaft 23 is screwed into a nut 26 rotatably coated on an upper support plate 25 fixed to an elevating cylinder 24 at the center of the upper part, and the nut 26 is connected to a drive source (not shown) via gears 27 and 28. The upper platen 2 is rotated forward and reversely around the adjustment screw shaft 23 by its drive source, and the upper platen 2 is rotated through the adjustment screw shaft 23.
2 is adjusted according to the split mold 3.

The operation shaft 11 has a cylindrical shape, and is fitted into a guide cylinder portion 29 formed in the center of the lower platen 8 so as to protrude downward. It is fitted freely. And this operation shaft 11
Two operating cylinders 52 for operating the split die are mounted at symmetrical positions on the lower end of the vulcanizer, and the piston rods 53 of the operating cylinders 52 are connected to the vulcanizer frame 32 with a pin.

The central mechanism 30 includes a bead elevating cylinder 33 that is vertically slidably fitted into the operating shaft 11 and has a lower bead mold 10 at its upper end, and an upper and lower cylinder that clamps both upper and lower ends of the molding bladder 2, respectively. a lower clamp body 34, 35, and a lower clamp body 35 which is fitted into the bead elevating cylinder body 33 so as to be vertically slidable;
a support body 36 that supports the bead-lifting cylinder 39;
The piston rod 40 is attached to the upper clamp body 3.
4 is connected to a lifting cylinder 41 and the like. A support cylinder 42 is fixed to the lower end of the lifting cylinder 33, and two bead lifting cylinders 44, each having a piston rod 43 connected to the operating shaft 11 by a pin, are attached at symmetrical positions to the lower end of the support cylinder 42. It is being

45 is an upper clamp dome, which is attached to the support plate 25. 46 is the lower clamp dome, lower platen 1
8 is attached to a support plate 47 on the lower side. A lock ring 48 is used to clamp and lock the upper and lower clamp domes 45 and 46.

49 is a tightening cylinder.

Next, the operation will be explained. During vulcanization molding, after putting the green tire 1 into the split mold 3 and clamping the mold, a heating medium is supplied into the molding plug 2 as shown by the imaginary line in FIG.
Vulcanization molding is performed with this molding bladder 2 attached to the inner surface of the green tire 1.

When taking out the vulcanized tire IA after vulcanization molding, first, the upper platen 22 side is raised to open the split mold 3 vertically. At this time, the upper mold 7 and the upper bead mold 9 of the split mold 3 rise together, so that the upper side of the split mold 6 becomes open as shown in FIG.

Next, when the operating cylinder 52 is operated in the upward direction, the operating shaft 11 rises as shown in FIG. Each split mold 6 slidably dovetail-fitted into the mold container 4 opens outward in the radial direction while rising, and is removed from the tire IA. At this time, since the central mechanism 30 is connected to the operating shaft 11 via the bead elevating cylinder 44, the bead elevating cylinder 33 and the like rise together with the operating shaft 11. but,
In order to facilitate the engagement of the chuck claw 51 of the take-out device 50 with the bead portion 1a of the tire IA, the lifting cylinder 4
1 in the lowering direction, the upper clamp body 34 is slightly lowered, and the molding bladder 2 is peeled off from the bead portion 1a.

Subsequently, after placing the take-out device 5o in a position above the split mold 3, when the bead lifting cylinder 44 is operated in the upward direction, the central mechanism 30, that is, the bead lifting cylinder 33, etc., rise, and the lower bead at the upper end thereof is lifted. The mold 1o separates the tire IA from the lower mold 8 and lifts it up. And the chuck claw 51
When the tire IA rises to the position shown in FIG.
The chuck claw 5 is peeled off from the inner surface of the tire IA.
After the bead portion 1a of the tire IA is chucked in step 1, the bead lifting cylinder 33 and the lower bead mold 10 are lowered, and the tire IA is taken out from the vulcanizer by the takeout device 50.

After taking out the tire IA, when the operation cylinder 52 is operated in the downward direction, the lower mold 8 is lowered via the operation shaft 11, so that each divided mold 6 is lowered relative to the mold container 4. , each split mold 6 closes radially inward.

By arranging the operating shaft 11 concentrically with respect to the central mechanism 30 in this way, it is possible to reduce the vertical height of the entire vulcanizer and make it more compact. It has the advantage of being more powerful.

Furthermore, by arranging the operating shaft 11 and the central mechanism 30 on the lower side, the split mold 3 can be easily mounted on the lower platen 18, making it easy to handle the split mold 3 and improving work safety. improves.

In the embodiment, the operating shaft 11 and the central mechanism 30 are provided on the lower side, but they may be provided on the upper side.

(Effects of the Invention) According to the present invention, since the split mold operating shaft 11 is externally fitted concentrically to the central mechanism 30, the entire vulcanizer can be downsized, and there is no unreasonable design and flexibility. becomes large.

Further, according to the present invention, the split mold operating shaft 11 and the central mechanism 30
are placed below the split mold 3, and the mold container 4 is placed under the mold container 4.
is provided on the lower platen 18, and the split mold 6 is provided on the upper end side of the split mold operating shaft 11, so handling of the split mold 3 is easy and work safety is improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a sectional view and FIG.
The figure is a partially cutaway plan view, and FIGS. 3 to 5 are operation explanatory diagrams. 1... Green tire, 2 river molding bladder, 3...
Split mold, 4... Mold container, 6... Split mold, 1
1... Split mold operation shaft, 18... Lower platen, 30
...Central mechanism.

Claims (2)

[Claims] (1) The mold container (4) and the plurality of circumferentially divided molds (6) arranged in the mold container (4) are relatively raised and lowered by the split mold operation shaft (11). In a tire vulcanizer equipped with a split mold (3) that opens and closes the split mold (6) in the radial direction by rotating the split mold operating shaft (
11) is provided so as to be fitted concentrically around a central mechanism (30). (2) The split mold operation shaft (11) and the center mechanism (30) are arranged below the split mold (3), and the mold container (4
) is provided on a lower platen (18), and a split mold (6) is provided on the upper end side of a split mold operating shaft (11).