JP2001322132A - Container for vulcanizing tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new container for vulcanizing a tire wherein since a structure is simple and can be made compact, a less space is sufficed compared with a conventional one, and a tire uniformity and a productivity can be remarkably improved. SOLUTION: Each sector piece 21 equipped with a tire profile surface constituting a sector mold 17 is freely detachably attached to a back segment 22 equipped with a slant surface 22a on a rear surface side. The slant surface 23a of a guide segment 23 hung from a support plate 16a is freely slidably engaged with the slant surface 22a of the back segment 22. When the support plate 16a is raised or lowered by a lifter, each sector piece 21 fitted to the back segment 22 via the slant surface 22a engaged with the slant surface 23a of the guide segment 23 is constituted so as to function by expansion and contraction toward a center on a lower part side plate 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for vulcanizing a tire, and more particularly, to a structure separated from a vulcanizer main body, thereby enabling external setup and a small space with a compact structure. The present invention also relates to a tire vulcanizing container capable of further improving tire uniformity and productivity.

[0002]

2. Description of the Related Art Conventionally, a vulcanizing method of a tire vulcanizer using a sectional container is, for example, as shown in FIG.
When each of the sector molds 1 divided in the circumferential direction is in an open state, the unvulcanized tire W is set on the central mechanism 2 (such as a bladder device) of the vulcanizer.

Then, the vulcanizer main body is operated via lifting / lowering / pressurizing means 3 such as a drive motor and a hydraulic cylinder to lower the upper mold 5 attached to the inner top plate 4, and to perform unvulcanized tire W Is pressed against the lower mold 6 attached to the base plate 6a.

At the same time, the outer ring 8 and the segment 9 attached to the top plate 7 of the vulcanizer
Each of the sector molds 1 is moved in the horizontal direction through a sectional container made of and pressed against the tread portion Wb of the unvulcanized tire W, and the central mechanism 2 is configured in the unvulcanized tire W in such a state. The heating and pressurized fluid Q such as steam is introduced through the bladder 10, and vulcanization is performed while the tire W is being pressurized.

[0005] That is, the vulcanization method conventionally used is:
At the same time as the upper mold 5 is moved vertically, each sector mold 1 is converted into a movement in the horizontal direction via an outer ring 8 and a segment 9 having the same conical curved surface (or tapered surface). The pressing force in the vertical direction of the vulcanizer body via the pressurizing means 3 serves as both the clamping force of the mold and the holding force for holding the internal pressure.

Reference numeral 3a denotes a cylinder for releasing each sector mold 1 from the tire W after vulcanization, and when the outer ring 8 is raised, each sector mold 1 is removed.
The segment 9 follows and suppresses the rise.

[0007]

However, the conventional vulcanizing apparatuses as described above require a large space because of their complicated structure and large size, and each sector mold moves up and down together with the upper mold. At the same time, because it is configured to move in the horizontal direction, there is a problem that the airtightness of the joint of the mold and the load from the circumferential direction become overloaded,
Furthermore, there is a problem that it is difficult to improve the tire uniformity and to improve the productivity of the tire because the setting of the tire and the vulcanization operation are performed by one vulcanizer.

SUMMARY OF THE INVENTION An object of the present invention is to provide a novel tire vulcanizer which has a simple structure and can be made compact, requires less space than conventional ones, and can significantly improve tire uniformity and productivity. Provide containers for

[0009]

In order to achieve the above object, the present invention provides a lower side plate having a vertically movable bladder center mechanism at the center and a lower mold on the upper surface, and an upper mold on the lower surface. The upper and lower movable upper side plates and the supporting plate are divided into a plurality of parts in the circumferential direction between the upper and lower molds, and the upper and lower molds expand and contract toward the center on the lower side plates as the upper side plates are raised and lowered. The sector mold comprises a back segment for detachably mounting each sector piece having a tire profile surface, and a back segment suspended from the support plate and formed on the back side of the back segment. And a guide segment that slides in engagement with the inclined surface.

According to the present invention, the unvulcanized tire is set in a sector mold in a step different from the tire vulcanizing step, and is transferred to the set vulcanizing container and vulcanized. Since the sector mold is configured to slide horizontally on the lower side plate as the support plate moves up and down, the sector mold expands and contracts. It has a simple structure, is compact, requires a small space, and can significantly improve tire uniformity and productivity.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a vertical sectional front view of a container for vulcanizing a tire according to the present invention, and FIG. 2 is a plan view of FIG. 12 and a lower side plate 14 having a lower mold 13 on the upper surface and an upper mold 15 on the lower surface.
The upper and lower molds 15 and 13 are divided into a plurality in the circumferential direction between the upper and lower molds 15 and 13, which can be lifted and lowered by the upper side plate 16 and the support plate 16 a which can be engaged with the upper side plate 16 via the stepped engaging portion 16 x. And a split-type sector mold 17 that expands and contracts toward the center on the lower side plate 14 as the support plate 16a moves up and down.

The lower side plate 14 is movably mounted on a base plate 18, and the upper mold 1
The liftable upper side plate 16 provided with the upper and lower members 5 is moved up and down through a lifting device (not shown) such as a hydraulic cylinder installed on the top plate 19, and through the upper side plate 16 and the engaging portion 16 x. The support plate 16a, which can be engaged with the actuator, is configured to move up and down via fixing means 25 described later.

The lower portion of the outer peripheral edge of the top plate 19 contacts the upper surface of the base plate 18 when the mold is closed, thereby closing the space S between the lower side plate 14, the upper side plate 16 and the support plate 16a. An airtight holding member 20 is suspended.

Each sector piece 21 having a tire profile surface constituting the sector mold 17 is detachably attached to a back segment 22 having an inclined surface 22a on the back side, and is attached to the inclined surface 22a of the back segment 22. The inclined surface 23a of the guide segment 23 suspended from the support plate 16a is slidably engaged with the inclined surface 23a of the guide segment 23 when the support plate 16a is moved up and down by the elevating device. Each sector piece 21 attached to the back segment 22 via the surface 22a is connected to the lower side plate 1.
4 is configured to expand and contract toward the center.

Between the lower side plate 14 and the support plate 16a, there are four guide pins 24 for positioning at approximately 90-degree intervals when moving up and down, and the lower side plate 14 and the support plate 16a when the mold is sealed. There are provided four fixing means 25 for fixing.

The fixing means 25 is, as shown in FIG.
Cylinder 26 fixed on lower side plate 14
A piston 28 is provided inside the body via a spring 27,
A screw shaft portion 28b at the tip of a piston rod 28a connected to the piston 28 is connected to a nut 28c by a driving device 29 such as a hydraulic motor installed on the top plate 19.
Is driven to rotate to lock the piston rod 28a by pulling it up, and by driving the driving device 29 in the reverse direction, the piston rod 28a is pulled through the nut 28c.
8a is configured to be released by depressing it.

Next, a method of setting the molded green tire W in the mold of the vulcanizing container body 1 will be described with reference to FIGS.

The green tire W formed by a second-stage tire forming machine (not shown) is taken out and the bladder center mechanism 12 is mounted.
The green tire W thus configured is gripped by a green tire loading / unloading device (not shown) and placed on the open base plate 18 of the vulcanizing container body 1. Into the sector mold 17 in a centered state.

Then, as shown in FIG. 3, the green tire W put into the expanding sector mold 17 is
After being moved together with the lower side plate 14 to the lower portion of the upper side plate 16 provided with the upper mold 15 and positioned and fixed, the upper side plate 16 provided with the upper mold 15 is gradually lowered to start mold clamping.

That is, in the mold clamping step, as shown in FIG. 4, when the lowering of the support plate 16a is started before the mold clamping is completed, the tight holding member 20 and the guide segment 23 are simultaneously lowered, and The inclined surface 23a of the guide segment 23 engages with the inclined surface 22a of the back segment 22 to which the sector piece 21 is attached.

Further, when the back segment 22 is lowered, the inclined surface 23a of the back segment 22 presses the inclined surface 22a of the back segment 22 from the vertical direction. Each of the sector pieces 21 slides horizontally toward the center of the tire W so that the green tire W
When the cover is completely covered and closed, the tight holding member 20 abuts on the base plate 18 and the upper side plate 1 is closed.
6, the support plate 16a and the lower side plate 14
The chamber partitioned by and the tight holding member 20 is completely closed.

Before each sector piece 21 is completely closed, the inside of each sector piece 21 is evacuated with a vacuum or the like, and after the chamber is completely sealed, the inside of the chamber is evacuated with a vacuum or the like. It is also possible.

In this manner, when the mold clamping is completed, the upper side plate 16 and the support plate 1 are fixed by the fixing means 25.
After locking with the 6a and the lower side plate 14 and shaping the green tire W, the top plate 19 and the tight holding member 20 are raised. Then, the vulcanizing container body 11 clamped by the upper side plate 16 and the lower side plate 14 is transferred to a vulcanizing device (not shown), and the green tire W is vulcanized as it is.

When the vulcanization is completed, the vulcanizing container main body 11 is carried out of the vulcanizing apparatus, the fixing means 25 is released, the support plate 16a is raised together with the top plate 19, and then the upper side plate 16 is not shown. Ascending and descending means, each sector piece 21
Is that the inclined surface 23a of the guide segment 23 slides in the direction of gradually increasing the diameter by rising from the inclined surface 22a of the back segment 22, and the vulcanized tire is separated from the mold. The vulcanized molded tire separated from the mold is carried out to the next step by a carry-out device or the like.

According to the present invention, the unvulcanized tire is set in a sector mold and transferred to the set vulcanizing container in a step separate from the tire vulcanizing step. Since the vulcanization is performed, the green tire before vulcanization can be set in the sector mold, so that the productivity of the tire can be improved, and the uniformity of the tire can be improved. Is configured to slide horizontally on the lower side plate to expand and contract, making it simpler and more compact than conventional vulcanizers equipped with sector molds, and can be used effectively in a small space. It is.

Further, since air can be removed from the sector mold when the mold is clamped, a puree tire can be produced, and the appearance and quality of the tire can be improved.

[0028]

As described above, the present invention provides a lower side plate having a lower mold on an upper surface and a lower side plate having a lower mold on an upper surface and a lower side plate having an upper mold on a lower surface. Plate and support plate, between the upper and lower molds, a divided sector mold that is divided into a plurality in the circumferential direction, and that expands and contracts toward the center on the lower side plate with the elevating operation of the upper side plate; The sector mold comprises a back segment for detachably mounting each sector piece having a tire profile surface, and an inclined surface suspended from the support plate and formed on the back side of the back segment. Since the guide segment slides on the guide segment, the following excellent effects can be obtained. (a) Since the sector mold and the vulcanizing device are not integrally formed as in the conventional case, the green tire can be set in the sector mold by external setup work, and therefore productivity and uniformity can be improved. Can be improved. (b). During the tire vulcanization process, external setup to a sector mold is possible, so that productivity can be improved and cost can be reduced. (c) .Since the vulcanizer and the sector mold have different configurations,
The whole device becomes compact, the installation space may be smaller than before, and energy savings are possible. (d) Since the configuration is simple, maintenance and inspection are easy. (e) Since air can be released from the sector mold when setting green tires, it is possible to produce puree tires and improve the appearance and quality of the tires.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a container for vulcanizing a tire according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an explanatory view showing a state in which a green tire set in a lower mold on a lower side plate is transported to a lower portion of an upper mold of an upper side plate.

FIG. 4 is an explanatory view of a state in which the upper mold of the upper side plate is lowered to start mold clamping.

FIG. 5 is an explanatory view showing a state in which the mold clamping of the green tire in the sector mold is completed and the lower side plate and the upper side plate are locked.

FIG. 6 is a half sectional view of a conventional tire vulcanizing apparatus provided with a sector mold.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Vulcanization container main body 12 Bladder center mechanism 13 Lower mold 14 Lower side plate 15 Upper mold 16 Upper side plate 16x Engagement part 16a Support plate 17 Sector mold 18 Base plate 19 Top plate 20 Airtight holding member 21 Sector piece 22 Back segment 22a Inclined surface 23 Guide segment 23a Inclined surface 24 Guide pin 25 Fixing means 26 Cylinder 27 Spring 28 Piston 28a Piston rod 28b Screw shaft portion 28c Nut 29 Drive unit W Green tire

Claims (2)

[Claims] A lower side plate having a lower mold on an upper surface, a lower side plate having an upper mold on a lower surface, a supportable upper and lower plate having an upper mold on a lower surface, and Between the molds, a divided sector mold that is divided into a plurality in the circumferential direction, and expands and contracts toward the center on the lower side plate with the elevating operation of the upper side plate, and the sector mold includes: A back segment for detachably mounting each sector piece having a tire profile surface, and a guide segment suspended from the support plate and engaged with an inclined surface formed on the back side of the back segment to slide. A tire vulcanizing container consisting of: 2. The tire vulcanizing container according to claim 1, wherein fixing means is provided between the lower side plate and the support plate.