JP2001277246A - Mold lifting device and mold moving device in tire vulcanization apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology for replacing a mold promptly and safely while attempting the full automation of the replacement by lifting the mold and moving it between the inside and outside of a tire vulcanization apparatus. SOLUTION: A mold lifting device M in which a lower mold 2 is mounted on a lower platen 22 through an intermediate plate 23, a fitting member 53 is formed in the upper end part of a vertically moving rod 5 installed on a bottom plate 20, and a fitting hole 26 into which the fitting member of the rod is fitted attachably/datachably and which can slide radially while being regulated in the circumferential direction in the fit state is formed in the intermediate plate is provided. A mold mounting arm 7 which, with the intermediate plate on which a mold is mounted lifted by the rod, reciprocates between a position where it retreats outside the tire vulcanization apparatus A and a point where it enters below the intermediate plate is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for lifting and lowering dies (upper and lower dies) in a tire vulcanizing apparatus for vulcanizing a green tire (green tire).

[0002]

2. Description of the Related Art In a tire vulcanizing apparatus, an upper mold is fixed to a lower surface of a top plate supported so as to be able to move up and down through an insulating plate and an upper platen, and an upper surface of a fixedly supported bottom plate is insulated. The lower mold is fixed via the plate and the lower platen, and the raw tire is held between the upper and lower molds while clamping the upper and lower molds, and steam is supplied to the pladder attached to the central mechanism to reduce the internal pressure. It is designed to be heated and vulcanized while being added.

[0003] When the mold is replaced in accordance with the change of the tire type, the steam line to the prada provided inside the mold is removed, the prada is removed from the center mechanism, and then the upper mold is replaced with the lower mold. After lowering the upper mold, the upper mold and the lower mold are uncoupled from the main body, and the upper and lower molds are joined together by bolts or the like, and this is lifted and taken out by a forklift or the like. . When a new mold is attached, the upper and lower molds joined by bolts or the like are lifted by a forklift or the like, and are attached in a procedure reverse to the above-described removal procedure.

[0004] In the mold replacement procedure, there have conventionally been various devices for attaching and detaching the steam line to and from the prada, attaching and detaching the device to and from the center mechanism of the ladder, and connecting devices to the main body of the upper mold and the lower mold. However, there is no device for moving the mold between the inside and the outside of the tire vulcanizing apparatus main body, and the mold is lifted and moved by a forklift or the like as described above.

[0005]

As described above, when the mold is lifted by a forklift or the like to be taken in and out between the inside and the outside of the tire vulcanizing apparatus main body, the work requires a lot of labor and time. Spending time greatly affects the productivity of the vulcanizer. It is a big problem that it takes a long time to change the mold when considering multi-product small-quantity production.
It is hard to say that the working environment is comfortable, and there has been a demand for the development of a mold exchanging apparatus which can automate this mold exchanging to some extent and can carry out it quickly. SUMMARY OF THE INVENTION The present invention has been made to meet the above-described demands. In replacing a mold, the mold is lifted, and the mold is moved between the inside and the outside of the tire vulcanizing apparatus in the lifted state. It is an object of the present invention to provide a mold elevating device and a mold moving device therefor.

[0006]

According to a first aspect of the present invention, a lowering platen is fixed on a bottom plate via a heat insulating plate. A lower mold is placed on the lower platen via an intermediate plate, and between the intermediate plate and the lower mold, a center positioning means and a circumferential positioning means for the lower mold are provided. A center positioning means for the intermediate plate is provided between the lower platen, a plurality of lifting rods are provided on the bottom plate, and a support surface for supporting a lower surface of the intermediate plate is formed at an upper end of the lifting rod. At the same time, a fitting member protrudes from the support surface, and the fitting member of the elevating rod is detachably fitted to the intermediate plate, and a radius of the fitting member is regulated in the circumferential direction in the fitted state. The direction was configured to slidable fitting hole is formed.

[0007] A mold moving device in a tire vulcanizing apparatus according to the present invention (claim 2) is a mold moving device provided with the above-described mold elevating device, wherein the intermediate plate on which the mold is mounted is provided. And a mold mounting arm that reciprocates back and forth between a position retracted to the outside of the tire vulcanizing apparatus main body and a position entered below the intermediate plate in a state where is lifted by the lifting rod. In this mold moving device, a heat insulating plate is mounted on the upper surface of the mold mounting arm, and a center positioning means and a circumferential positioning means for the intermediate plate are provided between the heat insulating plate and the intermediate plate. There is claim 3).

Next, the operation of the present invention will be described. When the mold is replaced, the removal of the steam line from the ladder, the removal of the ladder to the central mechanism, and the release of the connection of the upper mold and the lower mold to the main body are performed by conventional techniques. Then, the mold is raised by a mold lifting device.In the present invention, since the lower die is placed on the intermediate plate, when the lifting rod is raised,
With the intermediate plate supported by the support surface of the lifting rod, the mold is lifted together with the intermediate plate. In this case, the intermediate plate is raised to such a height as to prevent interference with the central mechanism.

Next, in the ascended state, the mold mounting arm of the mold moving device is caused to penetrate from the outside of the tire vulcanizing device to the inside, and the mold is placed on the heat insulating plate of the mold mounting arm. Deliver on the plate. In this case, the intermediate plate is raised slightly above the mold mounting arm, the mold mounting arm is made to enter below the intermediate plate, and then the lifting rod is lowered to lower the intermediate plate into the mold. It can be replaced on the mounting arm.

Next, the mold mounting arm is retracted from the inside of the tire vulcanizing apparatus to the outside, where the mold is replaced with a new mold. In this case, a new mold is formed by the center positioning means and the circumferential positioning means with respect to the intermediate plate.
The center position and orientation are determined. The center position and the orientation of the intermediate plate are positioned with respect to the mold mounting arm by the center positioning means and the circumferential direction positioning means with respect to the heat insulating plate.

Next, after the mold mounting arm is made to enter the inside from the outside of the tire vulcanizing apparatus, the lifting rod is raised,
The intermediate plate with the mold mounted thereon is slightly lifted, and in this state, the mold mounting arm is moved out of the tire vulcanizing apparatus. In this case, the elevating rod is received by the fitting member fitted in the fitting hole of the intermediate plate, the support surface abuts on the lower surface of the intermediate plate, and the mold is placed on the intermediate plate.

Then, the lifting rod is lowered to lower the intermediate plate on the lower platen. In this case, the center position of the intermediate plate is determined by the center positioning means with the intermediate plate provided between the lower platen. Is done. The orientation of the intermediate plate at this time is determined by fitting the fitting member of the lifting rod into the fitting hole of the intermediate plate. That is, since the fitting member is fitted in the fitting hole while being restricted in the circumferential direction, the orientation of the intermediate plate is thereby determined. Also, since the fitting member is fitted in the fitting hole so as to be slidable in the radial direction,
The thermal expansion difference of the intermediate plate due to the difference between the mold temperature when removing the mold and the mold temperature when attaching a new mold is absorbed by the sliding of the fitting member and the fitting hole. The orientation can be positioned.

After the intermediate plate on which the new mold is placed is lowered onto the lower platen, the upper mold and the lower mold are joined to the main body by the conventional technique. Then, when the prada is attached to the central mechanism and the steam line to the prada is attached, the mold exchange is completed.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows one embodiment of the present invention, and is a schematic front view of a tire vulcanizing apparatus provided with a mold elevating device, FIG. 2 is a schematic plan view of a mold moving device, and FIGS. It is operation | movement explanatory drawing of a moving apparatus.

First, the configuration of the mold lifting device M will be described.
In the figure, reference numeral 10 denotes a top plate, and an upper mold 1 is fixed to a lower surface of the top plate 10 via an upper heat insulating plate 11 and an upper platen 12. A bottom plate 20 is supported by a pressurizing cylinder 31 provided on a base frame 30 of the tire vulcanizing apparatus A. A lower platen 22 is fixed on the bottom plate 20 via a lower heat insulating plate 21. The lower mold 2 is placed on the platen 22 via the intermediate plate 23. Reference numeral 4 denotes a central mechanism, which is the bottom plate 20, the lower heat insulating plate 21, the lower platen 2
2. The intermediate plate 23 is attached to the base frame 30 so as to penetrate the center of the lower mold 2, and the upper end thereof is attached with a pladder 40.

A tie rod 13 is suspended from the four corners of the top plate 10, and the tie rod 13 is clamped by a clamp member 32 to hold the raw tire T between the upper and lower dies 1, 2. In a state where the upper and lower molds 1 and 2 are pressed by the pressure cylinder 31, the raw tire T is vulcanized and molded by supplying steam to the pladder 40 and applying heat while applying internal pressure.

Between the intermediate plate 23 and the lower mold 2, as a center positioning means of the lower mold 2, an annular convex portion 23 a of the intermediate plate 23, and a lower metal fitting which is fitted into the annular convex portion 23 a. An annular recess 2a of the mold 2 is provided.
Further, between the intermediate plate 23 and the lower mold 2, the lower mold 2 is provided.
Are provided with a locating pin 23b protruding from the upper surface of the intermediate plate 23 and a positioning hole 2b of the lower die 2 fitted into the locating pin 23b. Further, between the intermediate plate 23 and the lower platen 22, as a center positioning means of the intermediate plate 23,
An annular convex portion 22a of the lower platen and an annular concave portion 23c of the intermediate plate 23 fitted to the annular convex portion 22a are provided.

The intermediate plate 23 has four protruding portions 25 formed on the outer peripheral portion thereof, and the protruding portion 25 has a fitting hole 26 formed by a long hole whose longitudinal direction is the radial direction of the intermediate plate 23. ing. Also, the bottom plate 2
0, four guide holes 27 are formed at positions corresponding to the fitting holes 26, and each of the guide holes 27 has a lift rod 5
Are fitted slidably up and down while rotation is restricted by the key 5a. The lifting rod 5 is disposed at a position for preventing interference with the lower platen 22, the lower mold 2, and the like.
And a fitting hole 26 is formed in the protruding portion 25. The elevating rod 5 moves up and down on the pedestal frame 32 of the tire vulcanizing apparatus A by advancing and retreating a hydraulic cylinder 50 erected immediately below the elevating rod 5.

A stopper member 51 is provided at the upper end of the lifting rod 5 so that its lower surface is in contact with the upper surface of the bottom plate 20 to prevent the lifting rod 5 from falling. The upper surface of the stopper member 51 is formed on a support surface 52 that supports the lower surface of the intermediate plate 23, and a fitting member 53 that removably fits into the fitting hole 26 protrudes from the support surface 52. I have. The fitting member 53 has a lateral width just fitting with the lateral width of the fitting hole 26, is formed to be shorter than the length of the fitting hole 26, and has a fitting guide surface 54 tapered to the upper end.
Are formed in an inclined shape. Thereby, the lifting rod 5
Is smoothly fitted into the fitting hole 26, and is slidable in the radial direction while being restricted in the circumferential direction in the fitted state.

Next, the configuration of the mold moving device N will be described.
The mold moving device N includes a mold elevating device M configured as described above, and a mold mounting arm 7 that reciprocates between the outside and the inside of the tire vulcanizing device A. The mold mounting arm 7 is formed integrally with a movable cart 71 mounted on a rail 70 extending from the outside to the inside of the tire vulcanizing apparatus A so as to avoid interference with the tire vulcanizing apparatus A. Have been. Then, in a state where the intermediate plate 23 on which the molds 1 and 2 are mounted by the mold lifting device M is raised by the lifting rod 5, the intermediate plate 23 is retracted to the outside of the tire vulcanizing device A and below the intermediate plate 23. It reciprocates back and forth between the position where it entered. A heat insulating plate 72 is mounted on the upper surface of the mold mounting arm 7. This heat insulating plate 72
An annular convex portion 72a is formed on the upper surface of the intermediate plate 23 as a center positioning means of the intermediate plate 23 so as to fit into the annular concave portion 23c of the intermediate plate 23. Pin 7 fitted in positioning hole 23d formed on the lower surface of
2b is protruded.

Next, the operation of the present invention will be described. Mold 1,
As a pre-procedure, when exchanging 2, the steam line to the ladder 40 is removed in the state shown in FIG. 3, and the ladder 40 is removed from the center mechanism 4 to release the connection of the upper mold 1 and the lower mold 2 to the main body. Let it. Then, the molds 1 and 2 are raised by the mold lifting device M. When the lifting rod 5 is raised by the hydraulic cylinder 50, the intermediate plate 23 is supported by the support surface 52 of the lifting rod 5. As shown in FIG. 4, the molds 1 and 2 are lifted together with the intermediate plate 23. In this case, the intermediate plate 23 is raised to such a height as to prevent interference with the center mechanism 4.

Next, in the ascended state, the moving carriage 71 of the mold moving device N is moved toward the tire vulcanizing device A,
As shown in FIG. 5, the mold placing arm 7 is made to enter the inside from the outside of the tire vulcanizing apparatus A, and the molds 1 and 2 are placed on the intermediate plate 23 on the heat insulating plate 72 of the mold placing arm 7. Hand over. In this case, the intermediate plate 23 is lifted slightly above the mold mounting arm 7, and after the mold mounting arm 7 is moved under the intermediate plate 23, FIG.
By lowering the elevating rod 5 as described above, the intermediate plate 23 can be mounted on the mold mounting arm 7.

Next, the movable carriage 71 is moved toward the outside of the tire vulcanizing apparatus A, and the mold mounting arm 7 is retracted from the inside of the tire vulcanizing apparatus A to the outside as shown in FIG. Replace the molds 1 and 2 with new molds. In this case, the center position of the new mold is determined by the engagement between the annular concave portion 2a and the annular convex portion 23a with respect to the intermediate plate 23, and the orientation of the new mold is determined by the engagement between the positioning hole 2b and the locate pin 23b. Positioned. Further, the center position of the intermediate plate 23 is determined by fitting the annular concave portion 23c and the annular convex portion 72a into the mold mounting arm 7, and the positioning hole 23d and the locate pin 72 are located.
The orientation is determined by fitting with b.

Next, in the reverse procedure to the above, the mold placing arm 7 was made to enter the inside from the outside of the tire vulcanizing apparatus A, and then the lifting rod 5 was raised, and the molds 1 and 2 were placed. The intermediate plate 23 is slightly lifted as it is, and in this state, the mold mounting arm 7 is retracted from the inside of the tire vulcanizing apparatus A to the outside. In this case, the elevating rod 5 is configured such that the fitting member 53 fits into the fitting hole 26 of the intermediate plate 23 and the support surface 52
Abuts on the lower surface of the intermediate plate 23 and receives the molds 1 and 2 placed on the intermediate plate 23.

Then, the lifting rod 5 is lowered to lower the intermediate plate 23 on the lower platen 22. In this case, the intermediate plate 23 is formed between the lower platen 22 and the annular concave portion 23c and the annular convex portion 22a. The center position is determined by the inlay fitting. At this time, the orientation of the intermediate plate 23 is determined by fitting the fitting member 53 of the lifting rod 5 into the fitting hole 26 of the intermediate plate 23. That is, since the fitting member 53 is fitted in the fitting hole 26 while being restricted in the circumferential direction, the direction of the intermediate plate 23 is thereby positioned. Further, since the fitting member 53 is fitted in the fitting hole 26 so as to be slidable in the radial direction, the temperature of the mold at the time of removing the mold and the temperature of the mold at the time of mounting a new mold are different. The direction of the intermediate plate 23 can be positioned while absorbing the difference in thermal expansion of the intermediate plate 23 due to the difference by sliding the fitting member 53 and the fitting hole 26.

After lowering the intermediate plate 23 on which the new molds 1 and 2 are placed on the lower platen 22 in this manner, the upper mold 1 and the lower mold 2 are formed by a conventional technique. Is connected to the main body, and the ladder 40 is attached to the center mechanism 4 and the steam line to the ladder 40 is attached.

In this embodiment, the lower mold 2 is pressed from below by the pressurizing cylinder 31 in order to prevent the upper and lower molds 1 and 2 from opening during vulcanization molding by the tire vulcanizing apparatus A. In this case, the fitting of the fitting hole 26 of the intermediate plate 23 and the fitting member 53 of the lifting rod 5 prevents the lower die 2 from rotating while guiding the vertical stroke of the small stroke accompanying the pressing. it can.

Although the embodiment of the present invention has been described with reference to the drawings, the specific configuration is not limited to this embodiment. For example, two or more rods may be used as long as the intermediate rod on which the mold is placed can be stably supported. Further, as in the embodiment, the lifting rod may be provided separately from the hydraulic cylinder as the driving means, or may be connected to the hydraulic cylinder,
Further, a feed screw shaft or the like can be used as the driving means other than the hydraulic cylinder. Also, the center positioning means and the circumferential positioning means can be shared by the center positioning means and the circumferential positioning means by providing a plurality of locating pins, and in addition, a key or the like can be used. Also, when vulcanizing with a tire vulcanizing apparatus, when the vulcanized tire is lifted up from the lower mold, an upward force may be applied, and in order to prevent the lower mold from floating due to this upward force. Alternatively, a clamp device or a stopper device may be provided. In addition, when the tire vulcanizing device is provided with only the mold lifting device, the means for moving the mold between the inside and the outside of the tire vulcanizing device is not limited. Is also possible. When the mold moving device is provided, the moving means is not limited. For example, the mold mounting arm may be moved forward and backward by a hydraulic cylinder or the like without using a moving carriage. Further, the moving truck may be provided with a line attaching / detaching device that can be connected to a steam line branched from the steam heating line of the tire vulcanizing device, and a steam attaching / detaching device between the mold and the moving cart. At the time of mold replacement, the attachment / detachment device can also be used for attachment / detachment to / from a steam line heating the mold in the tire vulcanizing apparatus.

[0029]

As described above, in the mold elevating device of the present invention (claim 1), when the mold is replaced,
The mold can be lifted, and in the mold moving device of the present invention (claims 2 and 3), the mold is moved between the inside and the outside of the tire vulcanizing apparatus with the mold lifted. Can be moved. Therefore, the mold exchange can be completely automated, and the effect of quickly and safely exchanging the mold can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a tire vulcanizing apparatus provided with a mold lifting device according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of a mold moving device.

FIG. 3 is an operation explanatory view of a mold moving device.

FIG. 4 is an operation explanatory view of the mold moving device.

FIG. 5 is an operation explanatory view of the mold moving device.

FIG. 6 is an operation explanatory view of the mold moving device.

FIG. 7 is an explanatory diagram of the operation of the mold moving device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper die 10 Top plate 11 Upper heat insulating plate 12 Upper platen 2 Lower die 2a Annular concave part (center positioning means) 2b Positioning hole (circumferential positioning means) 20 Bottom plate 21 Lower heat insulating plate 22 Lower platen 22a Annular convex part (Center positioning means) 23 Intermediate plate 23a Annular projection (center positioning means) 23b Locate pin (circumferential positioning means) 23c Annular recess (center positioning means) 23d Positioning hole (circumferential positioning means) 26 Fitting hole 4 Center Mechanism 40 Prada 5 Lifting rod 50 Hydraulic cylinder 52 Support surface 53 Fitting member 7 Mold mounting arm 70 Rail 71 Moving carriage 72 Insulating plate 72a Annular convex portion (center positioning means) 72b Locate pin (circumferential positioning means) A Tire Vulcanization equipment M Mold lifting equipment N Mold movement Location

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Claims (3)

[Claims] 1. A lower platen is fixed on a bottom plate via a heat insulating plate, and a lower mold is placed on the lower platen via an intermediate plate, and a lower mold is placed between the intermediate plate and the lower mold. A center positioning unit for the mold and a circumferential positioning unit are provided; a center positioning unit for the intermediate plate is provided between the intermediate plate and the lower platen; a plurality of lifting rods are provided for the bottom plate;
A support surface for supporting the lower surface of the intermediate plate is formed at an upper end portion of the lifting rod, and a fitting member is protruded on the support surface, and a fitting member for the lifting rod is detachably attached to the intermediate plate. And a fitting hole which is slidable in the radial direction while being restricted in the circumferential direction in the fitted state. 2. A mold moving device provided with the mold elevating device according to claim 1, wherein the intermediate plate on which the mold is mounted is raised by an elevating rod, and the outside of the tire vulcanizing device. A mold mounting arm that reciprocates between a position at which it has exited and a position at which it has entered below the intermediate plate. 3. The mold moving device according to claim 2, wherein
A heat insulation plate is attached to the upper surface of the mold mounting arm,
A mold moving device provided with a center positioning means and a circumferential positioning means for the intermediate plate between the heat insulating plate and the intermediate plate.