JPS608965Y2 - Tire Japanese sulfur equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a mold for Japanese sulfur used in manufacturing tires for vehicles.

In general, the above-mentioned Japanese sulfur molds include a fixed sidewall mold that corresponds to one sidewall of the tire and is normally in a horizontal state, and a movable sidewall mold that can move or rise relative to the fixed sidewall mold.
It consists of a tread type interposed in between and corresponding to the tread surface of the tire.

It goes without saying that each of these parts is circular.

It is desirable that the tread pattern can be divided into a plurality of identical segments in the radial direction from the center of the tire so that it can be easily removed from the tread of a tire having an uneven pattern.

Then, when each divided tread mold completes the heating and raises the movable side wall mold, it automatically moves outward and leaves the tread of the tire, and then further raises the movable side wall mold, A Japanese sulfur apparatus has been proposed that is configured to rise accordingly.

The device includes each tread mold being coupled to the movable sidewall mold by an obliquely downward sliding engagement such that upward movement of the movable sidewall mold causes an outward horizontal movement of each tread mold. There is.

Furthermore, each tread mold is coupled to the fixed sidewall mold by a horizontal sliding engagement portion to prevent it from rising with the movable sidewall mold until each tread mold is completely separated from the tire tread. , so that it can be raised after the sliding connection is released.

However, in this type of Japanese sulfur equipment, if the sliding connection between the fixed side wall mold and the tread mold does not work smoothly for some reason, it is impossible to raise the movable side wall mold and open the Japanese sulfur mold. Otherwise, if the movable side wall mold is forced to rise, the device may be damaged.

This invention allows the outward horizontal movement of each tread type without being constrained by the fixed sidewall type, thereby preventing the upward movement of the movable sidewall type from becoming impossible or the device being damaged by the upward movement. The purpose is to eliminate shortcomings.

In Figure 1, 1 indicates a tire in Japanese sulfur, 2 and 3
is its side wall, and 4 is its tread.

Reference numeral 5 is of a fixed side wall type, and has an annular recess 6 on the upper surface corresponding to the tire side wall 2, and has a flat portion 21 extending in a direction perpendicular to the central axis of the tire 1 on the outside of the annular recess 6.

Reference numeral 7 is of a movable side wall type and has a recess 8 corresponding to the tire side wall 3 on the lower surface.

A tread type 9 is divided into a plurality of pieces in the radial direction of the tire, and an uneven pattern complementary to the tread pattern of the tire is engraved on the inner surface 10.

Each tread mold 9 has a concave groove 11 as shown in FIG.
It is dovetail-fitted.

As shown in FIG. 1, this dovetail structure is inclined downwardly and outwardly.

The upper part of the protruding strip 12 of the movable side wall mold 7 is removed.
Even when the mold is closed as shown in the figure, a space 13 is left in the groove 11 of the tread mold 9 above the protrusion 12.

The upper end of the groove 11 is a stopper 14 attached to the tread mold 9.
The lower end of the groove 11 is closed by a spring receiver 15 attached to the tread mold 9.

A spring receiving hole 16 is formed in the protrusion 12 along the protrusion from the lower end surface.
is drilled, and the spring 1 is inserted between the spring receiver hole 16 and the spring receiver 15.
7 is supported.

In the above-mentioned apparatus, when the movable side wall mold 7 is closed to the fixed side wall mold 5 as shown in FIG. The uneven pattern formed on the side surface 10 digs into the surface of the tread 4 of the tire 1.

Next, as shown in FIG.
While sliding on the top, when viewed from the movable side wall die 7, the extension force of the spring 17 causes the stopper 14 to move obliquely downward and outward along the dovetail fit, until the stopper 14 comes into contact with the upper end of the protrusion 12.

During this time, the uneven pattern on the inner surface 10 of the tread mold is completely separated from the tire tread 4.

When the movable side wall mold 7 is further raised as shown in FIG. Swells and begins to rise.

In this way, the tread mold 9 is removed outward from the tire 1 without damaging the tread, and the movable side wall mold 7 and the tread mold 9 are removed upward from the fixed side wall mold 5, leaving the tire 1 behind. Since it is removed, it becomes easy to move the tire 1 that has been treated with Japanese sulfur.

A feature of the device described above is that the fixed side wall mold 5 does not have any restraining means of the tread mold 9, such as a horizontal dovetail structure.

Therefore, it is possible to solve the problem that the horizontal movement is not smooth or that the movement of the dovetail fitting structure on the side of the movable side wall mold 7 competes with each other and the movement becomes impossible.

Then, the tread mold 9 is reliably separated from the tread surface of the tire 1 by the stretching force of the springs 17 before starting upward movement.

In the embodiment shown in FIG. 5, a spring hole 18 is bored in the movable side wall mold 7 from its upper surface toward the tread mold 9 in parallel to the dovetail fitting structure formed by the groove 11 and the protrusion 12. A spring 20 is interposed between the screw 19 screwed into the upper end and the upper end surface of the tread mold 9.

This spring 20 also presses the tread mold 9 diagonally downward and outward along the dovetail structure, similar to the spring 17 shown in FIGS. 1 to 3, so this embodiment also The operation is exactly the same as that of the embodiment shown in FIG.

As is clear from the above explanation, when using this invention, there are two movements: the movement of separating the divided tread mold from the tire by horizontally moving it outward, and the movement of removing the separated tread mold upward together with the movable side wall mold. can be carried out extremely smoothly.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the mold in the closed state in one embodiment of this invention, Figure 2 is a sectional view of the same embodiment with the mold slightly removed, and Figure 3 is the complete mold in the same embodiment. FIG. 4 is a cross-sectional view taken along the line A--A in FIG. 1, and FIG. 5 is a cross-sectional view of the mold in a closed state in another embodiment of this invention. 1... Tire, 2 and 3... This side wall, 4... Its tread, 5... Fixed side wall type (first side wall type), 6・・・・・・The recess, 7.
...Movable side wall type (second side wall type), 8...
・The recess, 9...Tread shape, 10...
...Inner surface thereof, 11 and 12... Dovetail fitting groove and protrusion (sliding engagement part), 14... Stopper, 17 and 20... Spring, 21...
Plane part.

Claims (1)

[Scope of utility model registration request] A first annular side wall mold having a recess corresponding to one side surface of the tire to be sulfurized, and a recess corresponding to the other side surface of the tire, and a first side wall mold having a recess corresponding to the other side surface of the tire. The tire comprises a second annular side wall type that opens and closes in the direction of the central axis, and a tread type that has an inner surface corresponding to the tread surface of the tire and is divided into a plurality of pieces in the radial direction of the tire, The first side wall mold has a flat part extending in a direction perpendicular to the central axis of the tire on the outside of the recess, and the second side wall mold has a flat part extending in a direction perpendicular to the central axis of the tire.
Each of the tread types is slidably supported by a sliding engagement portion that is inclined so as to move away from the center axis of the tire in the direction of the second side wall type, and the second side wall type and each of the tread types are connected to each other. In between, a spring presses each tread mold in the direction of the first side wall mold along the sliding engagement portion, and a spring presses the respective tread mold toward the sliding engagement portion of each tread mold by pressing the spring. and a stopper for restricting the movement along the tread mold to a limit position, and when the molds are closed, the tread molds are brought into close contact with each other in an annular manner and come into contact with the flat surface of the first sidewall mold. Then each of the above springs is in a compressed state,
At the beginning of the mold release movement in which the second sidewall mold moves away from the first sidewall mold, each tread mold moves away from the central axis of the tire while contacting the flat part of the first sidewall mold, and Each tread type moves along the sliding engagement part due to the pressing force of the spring, and after the stopper is activated, each tread type stops moving along the sliding engagement part and becomes parallel to the central axis of the tire. A tire curing device configured to be separated from a first sidewall mold by movement in a direction.