JP3992463B2 - Tire vulcanizer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention relates to a tire vulcanizing apparatus, are possible small space and more particularly a compact configuration, the present invention relates to a tire vulcanizing apparatus capable of further improving the productivity and the tire Uni follower Mi tea.
[0002]
[Prior art]
Conventionally, a vulcanization method of a tire vulcanizer using a sectional container is, for example, as shown in FIG. 7, when each sector mold 1 divided in the circumferential direction is in an open state, a central mechanism 2 ( A non-vulcanized tire W is set on a bladder device or the like.
[0003]
Then, the vulcanizer body is actuated via lifting / 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 the side surface of the unvulcanized tire W Wa is pressed against the lower mold 6 attached to the base plate 6a.
[0004]
At the same time, the sector molds 1 are moved in the horizontal direction via the sectional container composed of the outer ring 8 and the segment 9 attached to the top plate 7 of the vulcanizer, so that they are moved to the tread portion Wb of the unvulcanized tire W. In such a state, a heated and pressurized fluid Q such as steam is introduced into the unvulcanized tire W through the bladder 10 constituting the central mechanism 2 and the tire W is vulcanized in an internal pressure state. Is to do.
[0005]
That is, in the conventional vulcanization method, the upper mold 5 is moved vertically, and at the same time, each sector mold 1 is horizontally moved through the outer ring 8 and the segment 9 having the same conical curved surface (or tapered surface). Therefore, the mold tightening force and the holding force for holding the internal pressure are combined with the vertical lowering force of the vulcanizer body through the lifting / pressurizing means 3.
[0006]
In addition, 3a is a cylinder which peels each sector mold 1 from the tire W after completion | finish of vulcanization | cure, and when the outer ring 8 raises, each sector mold 1 and the segment 9 track | track and suppress a raise.
[0007]
[Problems to be solved by the invention]
However, the conventional vulcanizing apparatus as described above has a complicated structure and a large size, so that a wide space is required, and each sector mold moves up and down with the upper mold and moves in the horizontal direction. Therefore, there is a problem that the airtightness of the joint portion of the mold and the load from the circumferential direction are overloaded, and further, the tire uniform is used to set and cure the tire with one vulcanizer. There was a problem that it was difficult to improve Mitty and improve tire productivity.
[0008]
An object of the present invention is to provide a novel tire vulcanization capable of achieving a small space as compared with the prior art since the mechanism is simple and can be configured compactly, and can significantly improve tire uniformity and productivity. To provide an apparatus .
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention fixes the lower base plate (13) and the upper base plate (15) at a predetermined interval via a plurality of support rods (14) , and the lower base plate (13). above, the bladder (16) with a vertically movable bladder center mechanism (17) is installed, around the bladder center mechanism (17), the lower mold having a heating means (18a) on its periphery (6) The guide rail (29) is laid radially around the lower mold (6) , the heating means (19) is provided on the guide rail (29) , and the bladder central mechanism (17) A split-type sector mold (1) that expands and contracts in the radial direction toward the slidably mounted, and a support rod (14) between the lower base plate (13) and the upper base plate (15 ) to, and disposed a support plate for lifting (23) through a lifting cylinder (21), the upper The base plate (15) clamping fixing means for clamping during vulcanization on (38) is provided, on the lower surface of the support plate (23), on which is provided with heating means via a side plate (24) (25a) mold (25) and a guide means (26) for expanding and contracting the split-type sector mold (1) as the support plate (23) moves up and down, and the split-type sector mold (1) is a tire profile. Each sector piece (27) having a surface is constituted by a plurality of divided slide blocks (28) to which the sector pieces (27) are detachably attached , and the slide block (28) is a guide rail laid on the lower base plate (13) ( slidably configured along 29), the slide block (28) is flared inclined surface (28a) formed at a predetermined inclination angle (alpha) on the back side, on the inclined surface (28a) Tapered block (3 of guide means (26) suspended from the support plate (23) The gist of the present invention is that it is configured to disengage 0) .
[0012]
A pressurized fluid introduction device for introducing pressurized fluid into the bladder is connected to the bladder central mechanism, and the split type sector mold is divided into a plurality of detachably mounted sector pieces each having a tire profile surface. The slide block is slidably installed along a guide rail laid on the lower base plate .
[0013]
Further, the slide block is configured such that a rearwardly inclined surface is formed on the back surface side, and a tapered block of guide means suspended from the support plate is engaged with the inclined surface.
[0014]
In addition, ring-shaped stopper means for fixing the taper block engaged with the slide block to the back side at the time of mold clamping during the vulcanization is installed.
[0015]
By configuring the tire vulcanizing device in this way, the configuration is simpler than the conventional vulcanizing device and can be configured compactly, and it is possible to perform vulcanization work by installing it in a narrow space, Therefore, the vulcanizing device can be manufactured at a low cost.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0017]
FIG. 1 is a front view of the tire vulcanizing apparatus of the present invention, FIG. 2 is a plan view taken along arrow AA in FIG. 1, FIG. 3 is a plan view taken along arrow BB in FIG. -C shows a plan view as viewed in the direction of arrow C. In the vulcanizing device 11, a rectangular lower base plate 13 is horizontally installed on a foundation G via a support member 12.
[0018]
On the lower base plate 13, a plurality of support rods 14 (four in the four corners in this embodiment) having a predetermined length are erected, and the lower end of the support rod 14 is connected to the lower base plate 13 and a predetermined length. An upper base plate 15 having the same shape is horizontally installed with an interval.
[0019]
As shown in FIG. 2, an elevating bladder center mechanism 17 having a bladder 16 is installed at the center of the lower base plate 13, and a heater such as a bar heater is provided around the bladder center mechanism 17. A lower mold 18 provided with means 18a is detachably installed. Further, a split-type sector mold 20 (sector mold mechanism) that includes a heating means 19 such as a bar heater and that expands and contracts in the radial direction toward the bladder center mechanism 17 is disposed around the lower mold 18. ing.
[0020]
As shown in FIG. 3, the support rod 14 between the lower base plate 13 and the upper base plate 15 includes an elevating cylinder 21 installed on the upper base plate 15 and a plurality of (in this embodiment, two). A support plate 23 that is lifted and lowered via a guide rod 22 (the number of which is not particularly limited) is horizontally mounted, and a heating means 25 a such as a bar heater is provided on the lower surface of the support plate 23 via a side plate 24. A mold 25 is mounted so as to be movable up and down, and a guide means 26 for expanding and contracting the divided sector mold 20 is mounted on the outer periphery thereof.
[0021]
The split-type sector mold 20 is composed of a plurality of divided slide blocks 28 for detachably attaching each sector piece 27 having a tire profile surface. The slide block 28 includes heating means such as the bar heater. 19 is embedded and is slidably installed along a guide rail 29 such as a linear guide laid on the lower base plate 13.
[0022]
As shown in FIG. 4, the slide block 28 has an inclined surface 28 a having a divergent shape at a predetermined inclination angle α (for example, 15 ° to 20 °, preferably around 18 °) on the back side. An engaging portion 30a of a tapered block 30 of a guide means 26 suspended from the support plate 23 is engaged with the inclined surface 28a so that the split-type sector mold 20 is expanded and contracted toward the bladder center mechanism 17. It is configured.
[0023]
That is, an engagement groove 28x having a predetermined inclination angle α is formed on a divergent inclined surface 28a formed on the back side of the slide block 28, and an engagement portion of the taper block 30 is formed in the engagement groove 28x. 30a is engaged. Therefore, when the taper block 30 of the guide means 26 is raised and lowered, the engagement groove 28x of the slide block 28 and the engagement portion 30a of the taper block 30 are fitted to each other, and the split-type sector mold 20 is attached to the bladder center mechanism 17. It expands / contracts toward you.
[0024]
That is, when the taper block 30 is lowered, the vertical downward force is applied to the horizontal component force through the taper surface with the engaging portion 30a of the taper block 30 engaged with the engagement groove 28x of the slide block 28. When the sector mold 20 is moved toward the bladder center mechanism 17 and the taper block 30 is raised, the friction force between the engagement portion 30a of the taper block 30 and the engagement groove 28x of the slide block 28 increases. The sector mold 20 is moved so as to retract from the bladder center mechanism 17.
[0025]
In addition, as described above, the slide block 28 is configured such that the inclination angle α of the inclined surface 28a on the back side is set to 15 ° to 20 °, preferably around 18 °, and is further engaged with the engaging portion 29. By processing the upper corner portion 28R of the engagement groove 28x to have a radius of 10 to 30 mm, both members can be smoothly engaged without impact, and each sector mold 20 can be automatically operated by raising and lowering the taper block 30. It becomes a mechanism to open and close.
[0026]
The inclination angle of the inclined surface 28a of the slide block 28 is preferably designed to be 20 ° or less, and if it is 25 ° or more, the load increases and the taper block 30 may be deformed.
[0027]
The bladder center mechanism 17 has an upper end of a center post 32 that is lifted and lowered via a bladder lifting cylinder 31 fixed to the upper portion of the bladder 16 formed of the flexible material in a cylindrical shape via a clamp means 33. The lower end portion of the bladder 16 is fixed to a bladder clamp mounting means 34 installed inside the lower mold 18. A supply / exhaust pipe 35 for introducing or discharging a heating / pressurizing fluid Q such as steam or nitrogen gas at a set temperature / set pressure is connected to the bladder 16 attached in this manner. It is connected to a pressurized fluid introduction device (not shown) installed outside the device.
[0028]
Stopper means 36 such as a stopper ring is installed on the lower base plate 13 on the outer periphery of the slide block 28. The stopper means 36 engages with the slide block 28 during mold clamping during tire vulcanization. A stopper member 37 having a substantially L-shaped cross section formed on the back side of the taper block 30 is in contact with it to fix the mold opening.
[0029]
Further, a mold clamping fixing means 37 for clamping the mold at the time of vulcanization is installed on the upper base plate 15, and this mold clamping fixing means 38 prevents the upper mold 25 from opening the mold at the time of tire vulcanization. As shown in FIG. 5, the guide rod 22 protruding on the upper base plate 15 is locked by a lock mechanism 39 such as a hydraulic cylinder to prevent the mold from opening.
[0030]
The mold clamping and fixing means 38 for clamping the mold at the time of vulcanization is not limited to the above-described means for locking the guide rod 22 protruding on the upper base plate 15 by the lock mechanism 39, but the lower base plate 13 and the support plate 23. As long as the mold is clamped during vulcanization, the structure is not particularly limited.
[0031]
The lower surface of the support plate 23 is provided with sealing means 40 that hermetically covers the entire periphery of the mold during vulcanization. The sealing means 40 is a first covering the periphery of the upper mold 25 when the upper mold 25 is lowered. It consists of a seal plate 41 and a second seal plate 42 that covers the entire circumference of the mold during vulcanization, covers the periphery of the upper mold 25 before the upper mold 25 is completely closed, and deaerates the interior of the mold. When vulcanized in a closed state, the entire circumference of the mold in which the green tire W is housed is hermetically sealed so that it can be deaerated.
[0032]
Next, a tire vulcanizing method using the vulcanizing apparatus as described above will be described with reference to FIGS.
[0033]
First, with the upper mold 25, the lower mold 18, and the divided sector mold 20 arranged in the circumferential direction being opened, a green tire is attached to the bladder 16 attached to the bladder central mechanism 17 protruding from the center of the lower mold 18. Set with W (unvulcanized tire W) centered. The loading and unloading of the green tire W are automatically performed by a tire loading / unloading device (not shown), and the centering of the green tire W is performed simultaneously.
[0034]
In this state, a pre-pressurized fluid having a predetermined temperature and a predetermined temperature is introduced into the bladder 16 to shape the green tire W to hold the green tire W, and then the bladder center mechanism 17 is lowered to remove the green tire W. Set on the lower mold 18.
[0035]
From this state, the sector mold 20 is clamped and fixed while the upper mold 25 is lowered. As described above, this operation is performed when the engagement portion 30a of the taper block 30 is engaged with the engagement groove 28x of the slide block 28 of the sector mold 20 when the support block 23 is lowered and the taper block 30 is lowered. Thus, the sector mold 20 is moved toward the bladder center mechanism 17 by converting the downward descent force into a horizontal component force through the tapered surface.
[0036]
Further, when the support plate 23 is lowered, the first seal plate 41 of the sealing means 40 is also lowered and airtightly covers the periphery of the upper mold 25. At this time, a vacuum device or the like (not shown) Air is sucked (air venting) to remove the influence of residual air during vulcanization.
[0037]
Then, when the upper mold 25 and the sector mold 20 are completely closed, the second seal plate 42 of the sealing means 40 covers the entire periphery of the mold. ) And make the inside vacuum. Further, a stopper means 36 such as a stopper ring and a mold clamping / fixing means 38 prevent the molds from being opened during tire vulcanization.
[0038]
From such a state, a heating / pressurizing fluid Qa having a predetermined temperature is introduced into the bladder 16 at a predetermined pressure required for vulcanization, and the heating means 18a, 19, 25a embedded in the molds are moved up and down. The molds 25 and 18 and the sector piece 27 are heated to vulcanize the green tire W.
[0039]
When the vulcanization is completed after a lapse of a predetermined time, the heated / pressurized fluid Qa in the bladder 16 is discharged to the outside, the upper mold 25 is raised, and the sector mold 20 is expanded (the upper mold 25 The mold is automatically expanded as it rises), and the vulcanized molded tire is taken out from the upper mold 25, the lower mold 18 and the bladder center mechanism 17 by a tire carry-in / out device (not shown), and the operation is completed.
[0040]
Since the present invention is a vulcanizing device that is configured as described above and is smaller and more compact than a vulcanizing device having a conventional sector mold, a set for carrying in a green tire W and taking out the tire after vulcanization is performed. Can be easily performed, the vulcanization time can be shortened, and the tire uniformity and productivity can be remarkably improved.
[0041]
Further, when the mold is clamped, the air in the sector mold can be removed, so that a spuleless tire can be produced, and the appearance and quality of the tire can be improved.
[0042]
【The invention's effect】
Since the present invention is configured as described above, the following excellent effects can be obtained.
(a) Compared to a conventional vulcanizing apparatus equipped with a sector mold, the structure is simple and the apparatus can be made compact.
(b) The tire uniformity and productivity can be remarkably improved.
(c) The entire apparatus is compact, the installation space may be narrower than before, and energy saving is possible.
(d) Since the configuration is simple, maintenance and inspection are easy.
(e) When the green tire is set, the air in the sector mold can be removed, so that a spuleless tire can be produced and the appearance and quality of the tire can be improved.
[Brief description of the drawings]
FIG. 1 is a front view of a tire vulcanizing apparatus according to the present invention.
FIG. 2 is a plan view taken along arrow AA in FIG.
FIG. 3 is a plan view taken along the line BB in FIG. 1;
FIG. 4 is an explanatory diagram showing a relationship between a slide block of a split-type sector mold and a taper block of guide means.
FIG. 5 is a plan view taken along the line CC in FIG. 1;
FIG. 6 is a front view of a vulcanizing apparatus during tire vulcanization.
FIG. 7 is a half sectional view of a tire vulcanizing apparatus provided with a conventional sector mold.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sector mold 2 Central mechanism W of vulcanizer W Unvulcanized tire Wa Side surface 3 Lifting / pressurizing means 4 Inner top plate 5 Upper mold 6 Lower mold 6a Base plate 7 Top plate 8 Outer ring 9 Segment 10 Bladder Wb Tread part Q Heated and pressurized fluid G foundation 11 vulcanizing device 12 support member 13 lower base plate 14 support rod 15 upper base plate 16 bladder 17 bladder center mechanism 18 lower mold 18a heating means 19 heating means 20 sector mold (sector mold mechanism)
DESCRIPTION OF SYMBOLS 21 Lifting cylinder 22 Guide rod 23 Support plate 24 Side plate 25 Upper mold 25a Heating means 26 Guide means 27 Sector piece 28 Slide block 29 Guide rail 28a End-sloped inclined surface 30 Taper block 30a Engaging part 28x Engaging groove alpha Inclination angle 31 Bladder lifting cylinder 32 Center post 33 Clamp means 34 Bladder clamp mounting means 35 Supply / exhaust pipe 36 Stopper means 37 Stopper member 38 Mold clamping fixing means 39 Lock mechanism 40 Seal means 41 First seal plate 42 Second seal plate

Claims (4)

The a lower base plate (13) and an upper base plate (15) fixed at a prescribed interval through a plurality of support rods (14), on the lower base plate (13), lifting with the bladder (16) A possible bladder center mechanism (17) is installed, and a lower mold (6) having heating means (18a) around the bladder center mechanism (17 ) is detachably installed, and this lower mold ( A guide rail (29) is laid radially around 6) , and heating means (19) is provided on the guide rail (29) , and is expanded and contracted radially toward the bladder center mechanism (17). A split-type sector mold (1) to be slidably mounted is placed on a support rod (14) between the lower base plate (13) and the upper base plate (15) via an elevating cylinder (21). A support plate (23) is disposed and clamped on the upper base plate (15) during vulcanization. The clamping fixing means (38) which is provided, on the lower surface of the support plate (23), side plates (24) on which is provided a heating means (25a) through the mold (25), a support plate (23) And a guide means (26 ) for expanding and contracting the split-type sector mold (1) as it moves up and down.The split-type sector mold (1) includes each sector piece (27) having a tire profile surface. The slide block (28) is divided into a plurality of detachably mounted slide blocks (28) , and the slide block (28) is configured to be slidable along the guide rail (29) laid on the lower base plate (13). The slide block (28) forms a divergent inclined surface (28a) at a predetermined inclination angle ( α ) on the back side, and is suspended from the support plate (23) on the inclined surface (28a) . characterized by being configured so as to disengage the tapered block (30) of the guide means (26) Tire vulcanizing device that. Wherein the bladder center mechanism (17), the tire vulcanizing apparatus according to claim 1 connected to the pressurized fluid introducing device for introducing a pressurized fluid (Q) into the bladder (16). The tire vulcanizing apparatus according to claim 1 or 2, further comprising stopper means (36) for fixing the taper block (30) engaged with the slide block (28) from the back side during mold clamping during the vulcanization. . The tire vulcanizing apparatus according to claim 1, 2 or 3 , wherein a sealing means 40) is provided on the lower surface of the support plate (23) to hermetically cover the molds during vulcanization.

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