JP3300735B2 - Mold assembly for tire vulcanization - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire vulcanizing mold assembly applied to a pneumatic tire vulcanizing facility mounted on an automobile or the like.

[0002]

2. Description of the Related Art In a conventional tire vulcanizing press, a reaction time of vulcanization performed by introducing a heating and pressurizing medium into a tire in a state in which a tire mold is closed, and loading and shaping of an unvulcanized tire. S
In comparison with the time required for taking out a vulcanized tire, the latter is much shorter, and therefore, a mold opening / closing device for opening and closing a mold for carrying in / out of a tire, and a tire unloading. The operating rate of the input device is poor.

[0003] In order to improve the operation rate, improvement measures such as running a mold opening / closing device across a plurality of dies have been proposed, but the dies caused by the pressure of the heating and pressurizing medium are opened. It is more expensive to prevent the mold from opening against the force to be forced.In the case of the mold opening / closing device traveling type, it is necessary to replace the mold when the vulcanized tire specification changes. However, there is a problem that it involves a waiting time and involves a danger, so that it has not been put to practical use.

[0004] In order to solve this problem, the applicant of the present application has proposed a method in which the pressure of a high-temperature and high-pressure heating and pressurizing medium (steam, steam + inert gas, or hot water) introduced into the tire during tire vulcanization is used. Tire vulcanizing split mold that cancels the force to open the tire mold inside the mold and does not need to be tightened from outside the mold to prevent the tire mold from opening during vulcanization. An apparatus and a vulcanization facility to which the apparatus is applied have already been proposed (see Japanese Patent Application No. 6-122661).

The vulcanizing equipment will be described with reference to FIGS. 6 and 7. The vulcanizing station 1 (1a and 1b) includes a plurality of tire vulcanizing dies M (Ma, Mb, Mc,...). A plurality of mold stands 5 (5a, 5b, 5c,...) Are mounted. Each mold stand 5 has a mold moving means (for example, a cylinder-driven pusher) not shown, if necessary. A heating / pressurizing medium replenishing means, a pipe, and the like are provided.

[0006] Mold opening and closing station 2 (2a and 2b)
A mold opening / closing device 6 (6a and 6b) similar to a known tire vulcanizer (the difference will be described later), a known unloader 7 (7a and 7b) for carrying out a vulcanized tire from a tire mold, A known loader 8 (8a and 8b) for loading an unvulcanized tire into a tire vulcanizing mold, and, if necessary, a conveyor 9 (9a and 9b) for vulcanized tire transport; A rack 10 (10a and 10b) and the like are provided.

[0007] The mold carrier has a rail 4 fixed to the floor and a carriage 3 (3a, 3b) guided by the rail 4 and driven by a driving device (not shown).
The mold exchanging station 11 is a mold exchanging table 11 for exchanging a tread mold, a sidewall mold, etc. in a tire vulcanizing mold in accordance with a change in specifications of a vulcanized tire, exchanging a consumable bladder and the like. And mold opening / closing means required for these replacement operations.

Next, a split mold device for a tire vulcanizer will be described with reference to FIGS. 8 to 10. FIG. 8 shows that the uncured tire T is loaded, the tire vulcanizing mold is closed, and the bladder B is closed. Shows a state in which the heating and pressurizing medium is introduced into the tire T through the inside of the tire T, and vulcanization is started. Reference numeral 101 denotes a substrate of a tire vulcanizing mold M. The substrate 101 is mounted on a frame 6e of a mold opening / closing device 6a so as to be slidable in a horizontal direction, and a known locking device (not shown). ) By the frame 6e
It is fixed to.

Reference numeral 103 denotes the substrate 1 via the hard heat insulating material 102.
01 (in this example, a heating / pressurizing medium passage is provided to serve also as a hot plate. However, a conventionally known hot plate independent of the lower disk 103 is connected to the lower side of the lower disk 103. , 105 is a lower sidewall type fixed to the lower disk 103, 106 is a lower bead ring having an outer peripheral surface that engages the circumferential cylindrical surface of the lower sidewall type 105, and the cylindrical body 120. The lower end of the bladder B is clamped between a lower bead ring 106 and a bladder presser 107 which is bolted to the lower bead ring 106 and is detachably attached to a flange 120a formed on the center outer peripheral portion of the lower bead ring 106. ing.

[0010] As shown in FIG.
02, or may be fixed to the lower disk 103 or an independent heating plate below the lower disk. Reference numeral 109 denotes a tread type divided into a plurality of parts in the circumferential direction, and when closed, the outer peripheral surface forms a practical conical surface, and the pressure receiving plate 104 fixed on the flange 103 b formed on the outer peripheral portion of the lower disk 103 is closed. A tread mold 109 is bolted to the inner peripheral surface of the slidable segment 110.

Reference numeral 111 denotes an outer ring having an inner peripheral portion formed with a conical surface which engages with the outer peripheral surface of the segment 110. The outer ring 111 has a T-groove 110a formed in the vertical direction on the conical outer peripheral surface of the segment 110. An engaging and slidable T-bar 111 a is fixed to the inner peripheral conical surface of the outer ring 111. A segment 1 is provided with a slide guide 115 which is slidably mounted in a radial direction on a plurality of arms 114a extending in the radial direction on the outer peripheral portion of the upper disk 114.
When the upper disk 114 and the outer ring 111 are relatively moved up and down in the axial direction, the tread mold 109 moves in the radial direction via the segment 110, and is expanded and contracted. When the tread mold 109 is closed, the claws 110b and 110c formed at the upper end and the lower end of the segment 110 are connected to the upper disc 114 and the lower disc 103, respectively.
When the tread mold 109 is opened, the claw 110b and the claw 1 are engaged with each other.
The engagement between the claws 103a and 14b, 110c is released.

Reference numeral 113 denotes an upper disk 114 (in this example, a heating / pressurizing medium passage is provided to serve also as a hot plate.
A known hot plate independent of the upper disk 14 may be attached to the upper side of the upper disk 114);
Is an upper bead ring bolted to the upper sidewall type 113. A center post 121 is inserted into the cylindrical body 120 so as to be able to move up and down (slidably). A bush 123 is integrally attached to a lower end of the center post 121 and an outer peripheral surface slides on the inner peripheral surface of the cylindrical body 120. The inner peripheral surface is inserted into the upper end of the cylindrical body 120 so that the center post 12
1 is a packing for sliding the packing 1, 124 is a stopper for the packing 123, and a recess 121 a formed at the lower end of the center post 121 is provided with an automatic connecting means mounted on the tip of a rod of a center post lifting cylinder (not shown). Is inserted, and the upper end of the center post 121 is provided with a cap 12.
5 is fixed by a pin 126.

Reference numeral 118 denotes a flange bolted to the cap 125, and 117 denotes a bladder retainer bolted to the flange 118, and an outer peripheral portion of the flange 118 and the bladder retainer 11.
The upper end of the bladder B is sandwiched between the upper and lower ends of the bladder B, and both ends of the bladder B approach and separate by the operation of the center post elevating cylinder. A nozzle ring 127 having a plurality of nozzles 127a for introducing the heating and pressurizing medium into the tire T via the bladder B is fixed to the cylindrical body 120, and the heating and pressurizing medium passage 1 communicating with the nozzle 127a is fixed.
20c, a heating / pressurizing medium discharge passage 120d is formed, and quick couplers 128, 129 with check valves for connecting these passages 120c, 120d and the outer line of the die apparatus are provided at outlets of these passages 120c, 120d. Mounted on the part.

Reference numeral 130 denotes a cover plate, and the outer periphery of the cover plate 130 is bolted to an outer ring 111 via a spacer ring 112 and a hard heat insulator 131. 132 is a spacer fixed to the upper disk 114, and 119a, 119b and 119c are soft heat insulating materials. The locking means between the upper disk 114 and the cover plate 130 is provided by the inner ring 13 bolted to the upper disk 114.
8 and a bush 133 on the inner periphery of the cover plate 130.
And an outer ring 134 rotatably mounted through the outer ring 134, and a plurality of outer rings 134 formed on the inner periphery of the outer ring 134 and the outer periphery of the inner ring 138 and capable of engaging or passing in the axial direction depending on the rotation angle of the outer ring 134. It is constituted by a pair of claws 134a and 138a and a swing rotation device described later.

Reference numeral 136 denotes a stopper fixed to the outer ring 134. 9 and 10 indicate the mold opening and closing device 6.
The bolster plate is fixed to an arm 6c which is attached to the column a so as to be able to move up and down (slidably). 141 is a bolster plate 140
A known attachment / detachment device for attaching / detaching the cover plate 130 to / from the
135 is a pusher fixed to the bolster plate 140, 142 is a plurality of rods having one end fixed to the bolster plate 140, 143 is a mold opening / closing cylinder bolted to the other end of the rod 142, and 144 is a rod 143a of the mold opening / closing cylinder 143. Extension rod fixed to the tip of
Reference numeral 146 denotes a sleeve rotatably (slidably) attached to the extension rod 144, and reference numeral 145 denotes a bush screwed into the upper end of the sleeve 146.

The connecting means for connecting the mold opening / closing cylinder 143 and the upper disk 114 includes an extension rod 144,
Bush 145, sleeve 146, inner ring 138
Connecting rod 139 integrally attached to
A plurality of pairs of claws 139a and 146b are formed on the outer periphery upper portion of the sleeve 39 and the inner periphery lower portion of the sleeve 146 and can be engaged or passed in the axial direction depending on the rotation angle of the sleeve 146.

Reference numeral 148 denotes a lever. The lever 148 has a fork-shaped tip and is rotatably mounted on a bolster plate 140 via a pin 149. The lever 148 is connected between the other end of the lever 148 and the bolster plate 140. In
The cylinder 150 is assembled.
Causes the lever 148 to swing about the pin 149.

Reference numeral 147 denotes a rod fixed to an arm 146c extending outward from the sleeve 146.
Is parallel to the sleeve 146. And the same rod 14
7 is inserted into a U-shaped groove formed in the tip fork of the lever 148, the tip of the arm 137 is inserted into a key groove 146a formed in parallel with the axis on the outer periphery of the sleeve 146, and the arm 137 is attached to the outer ring 134. When the cylinder 150 is actuated and the lever 148 swings, the sleeve 146 is rotated, and the outer ring 134 is interposed via the sleeve 146 and the arm 137.
Also rotate.

By this rotation, when the pair of claws 134a and 138a is in the engaged state, the pair of claws 139a and 146b can pass (disengage), and the claws 134a and 138a
Is in a passable (released state), the claw 139
a and 146b are engaged.
When the pusher 135 is in contact with the attachment / detachment device 141 for the bolster plate 140 and the cover plate 130, the pusher 135 is
0 is pressed down to elastically deform, and hits the spacer 132 fixed to the upper disc 114,
The amount of deformation is regulated. And outer ring 1
When the 34 is rotated, it can be easily rotated with a gap in the height direction between the claw 134a on the inner peripheral portion of the outer ring 134 and the outer claw 138a of the inner ring 138, while being rotated,
After the claw 134a and the claw 138a are engaged, the bolster plate 140 is raised,
When the claw 134a and the claw 138a come into contact with each other, most of the downward displacement of the cover plate 130 is left, and the cover plate 130 acts as a spring body, and the outer ring 111, the segment 110, and the upper disc 114 Relative movements are offset internally. That is, the internal pressure inside the tire generates a force in the radial direction of the tread mold 109 and the segment 110, and this force is applied to the outer ring 111.
Is converted into an upward force on the inclined surface of the outer ring 11.
The downward elastic deformation force of the cover plate 130 prevents the movement of the cover plate 130 from moving upward with respect to the segment 110.

The operation of the tire vulcanizing equipment and the split mold device for a tire vulcanizer shown in FIGS. 6 to 10 is as follows. FIGS. 8 and 10 show that the tire vulcanization is completed in the tire vulcanizing mold Ma which has been in the mold stand 5a of the vulcanizing station 1a, and the tire vulcanizing mold M is moved by the mold carrier 3a.
a has been conveyed into the mold opening / closing device 6a of the mold opening / closing station 2a.

At this time, the set of claws 134a and 138a
In the engaged state, the set of claws 139a and 146b is in a passable state. From this state, first, the cylinder 6d is operated, the arm 6c is lowered, and the cover plate 130 and the bolster plate 140 are moved by the attaching / detaching device 141.
(See FIG. 9), the pusher 135 deforms the cover plate 130 downward, and creates a gap between the engagement surfaces of the claws 134a and 138a. The heating / pressurizing medium passages 120c and 120d are connected to the quick couplers 128 and 1 respectively.
It connects to the outside piping (not shown) via 29.

Next, a switching valve (not shown) is operated,
After the heating and pressurizing medium in the tire T is discharged, and it is confirmed that the pressure in the tire T has sufficiently decreased, the cylinder 150 is operated to engage a set of claws 139a and 146b, and The lock is released by connecting the rod 143 of the cylinder 143 and the pair of claws 134a and 138a so as to be able to pass through.

Next, as is well known, the cylinder 143 is operated in the direction in which the upper disk 114 is pushed down, and the cylinder 6d is operated in the direction in which the bolster plate 140 is raised. Then, the tread mold 109 is peeled off from the tire T to increase the diameter, and the claws 110b and 114
b, the engagement between the pawl 103a and the pawl 110c is released, and the bolster plate 140 is further raised to move the cylinder 14
When 3 reaches the stroke end, the claws 139a, 146
Since b is engaged, the upper disk 114 is pulled up and the tire vulcanizing mold is opened.

Next, the vulcanized tire T is carried out of the tire vulcanizing mold, the tire to be vulcanized is carried in, and then the cylinder 6d is operated in the reverse direction, and the vulcanized tire T is vulcanized. Close the mold. Then, first, the segment 110 suspended on the upper disk 114 comes into contact with the pressure receiving plate 104, and then, while the cylinder 143 is pushed back, the outer cylinder 110 descends via the bolster plate 140, and the tread mold 109 shrinks. When the diameter is increased, the tire vulcanizing mold is closed, and the pusher 135 deflects the cover plate 130 downward.

During this time, a shaping pressure gas is introduced into the tire T. At the final stage of reducing the diameter of the tread mold 109, the claws 110b and 114b, and the claws 103a and 110c
Are engaged. Thus, the tire vulcanizing mold is closed, the operation of the cylinder 143 is stopped, and the cylinder 150 is operated in the reverse direction, so that the claws 134a and 138a
Are engaged to lock the cover plate 130 and the upper disk 114, and to engage the claws 139a, 146.
b) so that it can pass through the bolster plate 14
0 rises, and the pawl 134a and the pawl 138a engage and abut. Next, a heating and pressurizing medium is introduced inside the tire,
Enter the vulcanization process.

At this time, the force for separating the sidewall molds 105 and 113 by the pressure of the heating and pressurizing medium is applied to the upper disk 114, the claws 114b and 110b, the segment 110, the claws 110c and 103a, and the lower disk 103. Offset in the mold apparatus. In addition, the radial force for expanding the tread die 109 is offset in the outer ring 111 via the segment 110, and the above-mentioned sliding force is generated by the sliding slope interposed between the segment 110 and the outer ring 111. The vertical component of the radial force,
That is, the force that causes the outer ring 111 to lift is determined by the elasticity of the spacer ring 112, the hard heat insulating material 131, the cover plate 130, and the cover plate 130, the outer ring 134, the claws 134a and 138a, the inner ring 138, and the upper circle. The offset is performed in the mold apparatus via the plate 114 and the claws 114b and 110b.

Therefore, it is no longer necessary to hold the mold device by an external force via the bolster plate 140, and the detachment device 141 is released, the cylinder 6d is operated, and the arm 6c is raised. The mold apparatus is moved to a predetermined position of the vulcanization station by the procedure, and vulcanization is continued.

[0028]

The tire vulcanizing equipment is premised on the use of a split mold device (commonly called a sectional mold container or a segmental mold container). Further, it is assumed that a self-locking split-type die device exemplified in FIG. 8 already proposed by the present applicant is used.

The tire vulcanizing equipment itself has remarkable effects on space saving, reduction of manufacturing cost, automation of a factory, and the like. Although conventional tire vulcanization dies (tire vulcanization dies that are used by assembling them into sectional mold containers) can be used as they are, it is necessary to prepare new split mold equipment, which is a more economical vulcanization facility. There is a disadvantage from a viewpoint.

The present invention has been made in view of the above problems, and has as its object the purpose of converting a conventional tire vulcanizing mold held by a tire factory into a complex mechanism and special processing. It can be easily transported without the need, the drive means for moving the lock plate can be shared, the device can be simplified, and the malfunction of the electric interlock circuit can be prevented as much as possible. Another object of the present invention is to provide a tire vulcanizing mold assembly that can improve safety.

[0031]

To achieve the above object, a tire vulcanizing mold assembly according to the present invention comprises an upper plate for supporting an upper mold portion of a tire vulcanizing mold, and a tire vulcanizing mold assembly. A lower plate for supporting the lower portion of the sulfur mold so as to be able to move up and down, a mold clamping piston plate incorporated in the lower plate, and one end fixed to one of the upper plate and the lower plate; A plurality of rods, the other ends of which are inserted into holes provided in the other of the lower plate and the lower plate, and a lock plate which can be moved in and out between the other ends of the rods inserted into the holes. (Claim 1).

In the tire vulcanizing mold assembly, one end of the rod is fixed to the lower plate, and a hole for inserting the other end of the rod is formed in the upper plate. When the lock plate connecting the upper plate and the lock plate connecting the upper plate and the rod are integrated and the bolster plate and one of the rods are connected to the upper plate, the connection between the other rod and the upper plate is released. (Claim 2).

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a tire vulcanizing mold assembly M according to the present invention will be described with reference to FIGS. 2
00 is a known tire vulcanizing mold (a mold in which a tread mold portion is divided into a plurality in the circumferential direction and is generally called a sectional mold, or a two-piece vertically divided mold called a two-piece mold). ), 201 is an upper plate on which an upper mold portion 200a of the tire vulcanizing mold 200 is mounted via a heat insulating plate 207, and 204 is a lower mold portion 200b of the tire vulcanizing mold 200. The lower plate 202 is attached to the lower plate 204 so as to be able to ascend and descend by means described later in detail.
A plurality of rods, the other ends of which can be inserted into holes 201 a formed in the upper plate 201,
And a spacer inserted into the rod 202 to regulate a distance between the lower plate 204 and the lower plate 204.

Reference numeral 206 denotes a block bolted to the upper plate 201, and 205 denotes a lock plate slidably inserted into an upper surface of the upper plate 201 and a recess formed on a lower surface of the block 206.
The same hole 20a as the hole 201a formed in the upper plate 201
1a is formed with a hole 206a having the same diameter and concentricity. An oval hole 205a is formed in the lock plate 205, and the large-diameter side 205c of the hole 205a is
The small diameter side 205b of the same hole 205a can be engaged with the recess 202a formed at the upper end of the rod 202, and the large diameter side 205c of the hole 205a and the hole
1a and 206a are concentric (see FIG. 4), the upper end of the rod 202 can enter and exit, the rod 202 is inserted, the lock plate 205 slides, and the hole 205a
When the small-diameter side 205b is engaged with the recess 202a of the rod 202 (see FIG. 5), the rod 202 and the upper plate 201 are connected.

The block 206 has a fin # 21 formed at the lower end of a rod 215 connecting the bolster plate 140 having an upper end fixed to the bolster plate 140 (see FIGS. 9 and 10) and the upper plate 201.
5a is formed through which a hole 206b can pass. The lock plate 205 is formed with a hole 205d having a hole 205f through which the franc # 215a can pass and a shelf 205e for engaging the franc # 215a, and the franc # 215a is engaged with the shelf 205e. Then, the bolster plate 140 and the upper plate 201 are connected. This portion corresponds to the attaching / detaching device 141 of the conventional device. The holes 205a and 205d are arranged so that when one of the rods 202 and 215 is locked, the other can pass.

Reference numeral 213 denotes a connecting rod for connecting the lock plate 205 to the adjacent lock plate 205, reference numeral 214 denotes a cam roller attached to the connecting rod, reference numeral 216 denotes a cam plate for holding the cam roller 214, and bolster plates 140 include the ones shown in FIGS. It is assembled so as to be interlocked with the EF direction of FIG.
It reciprocates by the operation of a driving device (not shown) attached to the bolster plate 140.

In this embodiment, the lock plate 205 moves linearly along the line EF. However, the lock plate 205 is moved around the center line DD along the tire vulcanizing mold assembly M. You may comprise so that it may perform a circular motion. 209 is a piston plate incorporated in the lower plate 204 so as to be able to move up and down.
A known seal member (for example, an O-ring) is incorporated between the lower plate 204 and the piston plate 209 to form an airtight chamber 210 surrounded by the lower plate 204 and the piston plate 209.

At the other end of a passage (not shown) having one end opening to the airtight chamber 210, a quick coupler (not shown) for connecting a pipe to the pressure fluid supply / discharge device is attached. By supplying and discharging the pressure fluid to and from the airtight chamber 210,
The piston plate 209 is moved up and down, and the lower mold portion 2 is mounted via an insulating plate 208 attached to the piston plate 209.
00b is pushed up, and the mold 200 is tightened.
Reference numeral 211 denotes a ring for preventing the piston plate 209 from going up and down.

A fork 200c having a slit in the radial direction is provided integrally on the outer periphery of the lower mold portion 200b, and a T-shaped block 212 slidably inserted into the slit is provided on the lower plate via a ring 211. 204, and the lower mold part 200b is connected to the fork 2
By the sliding of the slit 00c and the T-shaped block 212, the lower and upper plates 204 are concentrically moved up and down. And lower mold part 200b by tire peeling force etc.
The upward stroke of the lower mold portion 200b is regulated by the overhang of the T-shaped block 212 so as not to excessively rise.

Next, the operation of the tire vulcanizing mold assembly M will be described. In the vulcanizing station 1, the upper plate 201 and the rod 202 of the mold assembly M during tire vulcanization are connected via the lock plate 205 (see FIGS. 1 and 5). The piston plate 209 is moved downward by the action of the pressure fluid previously filled in the airtight chamber 210.
00b, the mold 200 is kept closed against the force to open the tire mold 200 generated by the pressure of the heating and pressurizing medium injected into the tire. Since the pressing force is canceled through the upper plate 201, the lock plate 205, the rod 202, and the lower plate 204, there is no need to apply a force from the outside.

During the tire vulcanization, if necessary, the heating and pressurizing medium and the pressurized fluid are replenished. As the pressurized fluid, although heat insulating plates 207 and 208 are interposed, heat transfer is not performed. The airtight room 210,
Considering that the temperature of the rod 202 slightly rises, and considering the slight leak from the seal member, the gas (air, inert gas, etc.) is better than the liquid (water, oil, etc.) having small compressibility. It is.

After the vulcanization is completed, the mold conveying means 3
The mold assembly M carried into the mold opening / closing device 6 of the mold opening / closing station 2 holds the lower plate 204 with the frame 6.
After locking to e, the heating and pressurizing medium is discharged from the inside of the tire, and the pressurized fluid is discharged from the airtight chamber 210. During this time, the bolster plate 140 descends, and the lower end of the rod 215 contacts the upper plate 201. When this step is completed, the lock plate 205 slides, and the connection between the upper plate 201 and the rod 202 is released, and at the same time, the upper plate 201 and the rod 215 are connected (FIG. 4).
reference).

Next, the bolster plate 140 is raised, the mold 200 is opened by a known procedure, the vulcanized tire is taken out, and then the unvulcanized tire to be vulcanized is carried in. Shaping of the tire and closing of the mold 200 are performed. When the mold 200 has been closed, the lock plate 205 slides in the opposite direction to the above, and the upper plate 201
The connection between the upper plate 201 and the rod 202 is performed at the same time when the connection between the upper plate 201 and the rod 202 is released, and then the pressurized medium is filled in the airtight chamber 210 in the reverse procedure, and the inside of the tire is heated and pressed. The medium is injected and enters the vulcanization process, where it is transported to a predetermined position in the vulcanization station and vulcanization continues.

When the mold 200 is replaced, the loading of the unvulcanized tire, the filling of the pressurized fluid, and the injection of the heating and pressurizing medium are omitted, and the mold 200 is transferred to the mold exchanging table 11, where the parts are replaced. .

[0045]

According to the tire vulcanizing mold assembly of the first aspect, the following effects can be achieved. That is, when vulcanization is completed in the vulcanization station, after locking the lower plate of the tire vulcanizing mold assembly carried into the mold opening / closing station by the mold conveying means to the base of the mold opening / closing device,
The vulcanizing heating and pressurizing medium is discharged from the inside of the tire, the internal pressure of the tire is reduced, the pressurizing medium is discharged from the airtight chamber formed by the piston plate and the lower plate, and the tire mold is released. And during this time, lower the bolster plate,
After contacting the upper plate and then connecting the bolster plate and the upper plate, pulling out the lock plate and releasing the connection between the upper plate and the lower plate via the rod, the tire vulcanizing metal is made in a known procedure. The mold is opened, the vulcanized tire is taken out, the tire to be vulcanized is carried in and shaped, and the mold is closed. When the mold is closed, insert the lock plate in the reverse procedure to connect the upper plate and the lower plate via the rod, and then pressurize the pressure medium into the airtight chamber formed by the piston plate and the lower plate. And after tightening the mold,
Inject the heating and pressurizing medium for tire vulcanization inside the tire,
At the time of vulcanization process, at this time, by the piston plate, the tire mold is tightened with a force equal to or more than the force for opening the tire mold by the pressure of the heating and pressurizing medium injected into the tire,
Since this reaction force cancels out between the upper plate and the lower plate via the rod, it is not necessary to pressurize from the outside after the connection, and the connection between the bolster plate and the upper plate is released. Raise the bolster plate. When the vulcanization process is started, the lower plate and the mold opening / closing device base are unlocked, and the vulcanization process is continued by placing it in a predetermined position in the vulcanization station by transport means. The conventional tire vulcanizing mold can be easily made portable without requiring a complicated mechanism or special processing.

In the above steps, paying attention to the connection between the bolster plate and the upper plate and the connection between the upper plate and the rod, either one must be connected without fail, but both are connected at the same time. Not only does it need not be done, but it is desirable to avoid connecting at the same time as much as possible. The tire vulcanizing mold assembly according to claim 2 pays attention to this point, and mechanically unifies the connecting lock plates of the two, and when one is connected, releases the other connection. By doing so, the drive means for moving the lock plate can be shared, and the device can be simplified,
Malfunction of the electrical interlock circuit can be prevented as much as possible, and safety can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a first embodiment of a tire vulcanizing mold assembly of the present invention.

FIG. 2 is a vertical sectional front view taken along the line AA of FIG. 1;

FIG. 3 is a cross-sectional plan view taken along the line BB in FIG. 1;

FIG. 4 is a cross-sectional plan view taken along line CC of FIG. 1;

FIG. 5 is a cross-sectional plan view of another embodiment taken along line CC of FIG. 1;

FIG. 6 is a plan view of a tire vulcanizing facility already proposed by the present applicant.

FIG. 7 is a side view taken along line GG of FIG. 6;

FIG. 8 is a vertical sectional front view taken along line dd in FIG. 7;

9 is a vertical sectional front view showing one mode of the tire mold and the mold opening / closing device along the line dd in FIG. 7;

FIG. 10 is a vertical sectional front view showing another mode of the tire mold and the mold opening / closing device along the line dd in FIG. 7;

[Explanation of symbols]

 M Tire vulcanizing mold assembly 1 (1a, 1b) Vulcanizing station 2 (2a, 2b) Mold opening / closing station 3 (3a, 3b) Mold conveying means 140 Bolster plate 200 Tire vulcanizing mold 200a Tire Upper part of mold for vulcanization 200b Lower part of mold for tire vulcanization 201 Upper plate 202 Rod 204 Lower plate 205 Lock plate 209 Piston plate

Claims (2)

(57) [Claims] 1. An upper plate for supporting an upper mold portion of a tire vulcanizing mold, a lower plate for supporting a lower mold portion of the tire vulcanizing mold so as to be able to move up and down, and a metal incorporated in the lower plate. A mold clamping piston plate, and a plurality of rods having one end fixed to one of the upper plate and the lower plate and having the other end inserted into a hole provided in the other of the upper plate and the lower plate. A mold plate for vulcanizing a tire, comprising: a lock plate which can be inserted into and removed from the other end of the rod inserted into the hole. 2. A hole for fixing one end of the rod to the lower plate and inserting the other end of the rod in the upper plate, and connects the bolster plate and the upper plate of a mold opening / closing station. The lock plate and the lock plate connecting the upper plate and the rod are integrated, and when connecting one of the bolster plate and the rod to the upper plate, the connection between the other rod and the upper plate is released. The tire vulcanizing mold assembly according to claim 1, wherein