JP2013031966A - Device for disassembling and assembling vulcanizing mold, and method for using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for dismantling and assembling a vulcanizing mold that can readily and briefly dismantle and assemble the vulcanizing mold that is referred to as a split mold outside a vulcanizing machine without damaging the mold, and that can thereby improve operability in dismantling and assembling the vulcanizing mold, and to provide a method for using the device.SOLUTION: The device for dismantling and assembling the vulcanizing mold includes: a supporting platform 1; a lifting table 2 that lifts and varies the vulcanizing mold 20 is provided and disposed on the supporting platform 1; and a mold expansion/contraction means 3 that is arranged around the lifting table 2 for supporting a sector mold 21 and varying an expansion/contraction diameter of the sector mold 21 from its outer circumferential side.

Description

  The present invention disassembles and assembles a vulcanization mold called a split mold, in which a sector mold comprising a plurality of sector pieces divided in the circumferential direction is disposed on the outer peripheral side of a pair of upper and lower side molds. The present invention relates to an apparatus and a method for using the apparatus, and in particular, while preventing the occurrence of damage to the mold due to the disassembly and assembly of the mold outside the vulcanizer, the time required for the work is reduced and the labor is reduced. The present invention proposes a technique for reducing the weight and greatly improving the workability of disassembling and assembling the vulcanization mold.

  When manufacturing a pneumatic tire, for example, in the step of vulcanizing and molding a raw tire molded on a molding drum, the vulcanized mold is disposed above the upper side mold and is An upper holder that is displaceable to the lower side mold, a lower holder that indirectly contacts the lower side mold to support the vulcanization mold, a plurality of segments that surround the periphery of the sector mold, and an attachment to the upper holder. Generally, a vulcanization mold is attached to the inside of a vulcanizer having an outer ring that expands and contracts the sector mold, and the vulcanization mold is opened and clamped by the operation of the vulcanizer. Is.

  By the way, in the raw tire vulcanization molding process, it is necessary to use a vulcanization mold having an inner surface shape corresponding to the size and type of the tire to be manufactured. Therefore, conventionally, each time a tire of a different size or type is manufactured. In addition, from a vulcanizing device in which a vulcanizing mold is mounted in a vulcanizer, a state in which a vulcanizing mold, upper and lower holders forming a part of the vulcanizer, and a plurality of segments and an outer ring are connected to each other In addition to the vulcanization mold, the upper and lower holders, a plurality of segments and the outer ring are heavy as well. Therefore, it takes a lot of time and labor to replace the tires, and the types of tires have increased as in recent years. In the situation where there, due to the above replacement in vulcanization molding process, reduction in the production efficiency of the tire has been forced.

  On the other hand, Patent Documents 1 to 3 propose a vulcanizing apparatus that allows only the vulcanization mold to be replaced. For example, Patent Document 1 discloses that “the upper and lower holders are placed on the lower holder. The lower side mold, the upper side mold attached to the upper holder via the upper plate, the sector mold including a tread element divided into a plurality of pieces for mainly molding the tire tread portion, and the outer periphery of the sector mold. In a tire vulcanizing apparatus including a number of locked segments and an outer ring that is attached to an upper holder and moves each segment in a radial direction, the upper side mold is detachably fixed to the upper plate 1 Clamping means for base and contacting / separating means for approaching or separating the upper side mold from the upper holder in a fixed state with the upper plate It is described "ones which comprises a.

  According to such a vulcanizing apparatus, only the vulcanization mold is replaced while the upper and lower holders, the plurality of segments, and the outer ring that have been replaced together with the vulcanization mold are left in the vulcanizer in the conventional replacement operation. Therefore, the mold replacement work accompanying the change of the size or the like of the tire to be manufactured becomes easy, and the production efficiency of the tire can be increased.

Japanese Patent No. 4007714 Japanese Patent No. 3865503 Japanese Patent No. 3865500

  By the way, in replacing | exchanging a vulcanization mold in the vulcanization | cure apparatus described in patent documents 1-3, the upper and lower side mold and sector mold which were mutually fitted of the vulcanization mold are made into the outer peripheral side of a sector mold. After the vulcanization mold is lifted with a crane or the like and taken out from the vulcanizer in a state of being integrated with each other by tightening with a mold band, the skilled worker slightly removes the sector mold whose periphery is tightened with the mold band. The vulcanization mold was disassembled by increasing the diameter and removing the upper and lower side molds from the sector mold while forming a gap between the sector mold and the upper and lower side molds.

  Then, the assembly of the vulcanizing mold to be placed in the vulcanizer next is performed by a skilled worker who is composed of a plurality of sector pieces connected to each other by attaching a storage ring on the upper edge of the lower side mold. After placing the mold, tightening the sector mold from the outer peripheral side with the mold band and removing the storage ring, while slightly expanding the sector mold, fit the lower side mold from the lower side of the sector mold and the upper side It was done by fitting the upper side mold.

  However, when the disassembly of the vulcanization mold taken out from the vulcanizer and the assembly of the vulcanization mold to be attached to the vulcanizer are performed manually as described above, the operator needs high skill. This increases the time required for disassembling and assembling work, so that the tire production efficiency cannot be sufficiently improved, and when the upper and lower side molds are removed from the sector mold or fitted to the sector mold. As a result, there is a risk that the mold may be damaged, and therefore, the high quality of the product tire cannot be sufficiently secured.

  The object of the present invention is to solve such problems of the prior art, and the object of the present invention is to disassemble and assemble the vulcanization mold outside the vulcanizer into the mold. Vulcanizing mold disassembly and assembly apparatus that can be performed easily and in a short time without fear of occurrence of damage and can greatly improve the workability of disassembling and assembling of the vulcanizing mold, and method of using the same To provide.

  The vulcanization mold disassembly and assembly apparatus according to the present invention is a sector mold comprising a plurality of sector pieces divided in the circumferential direction on the outer peripheral side of a pair of upper and lower side molds positioned opposite to each other in a posture surrounding the side mold. A support table, a lift table provided on the support table for moving up and down the vulcanized mold, and a sector mold disposed around the lift table. And a mold expansion / contraction means for supporting the sector mold to displace the expansion / contraction diameter.

  Here, the mold expansion / contraction means includes an engaging claw that engages with a pin protruding from the outer peripheral surface of each sector piece of the sector mold, and a forward / backward movement for moving the engaging claws in the radial direction of the sector mold under mutual synchronization. It is preferable to configure with a drive mechanism.

Further, the method of using the disassembly / assembly apparatus for a vulcanization mold according to the present invention, when assembling the vulcanization mold using any of the above disassembly / assembly apparatuses,
After placing the lower side mold on the lifting table and lowering the lifting table, the sector mold is disposed on the mold diameter expanding means, and the sector mold is supported from the outer peripheral side by the mold expanding / contracting means,
Next, in a state in which the sector mold is expanded and displaced by the mold expansion / contraction means, the lower side mold is raised and the lower side mold is fitted from the lower side of the sector mold, and the upper side mold is moved from the upper side of the sector mold. After fitting, the sector mold is reduced in diameter by the mold expansion / contraction means, and the sector mold is fitted to the outer peripheral sides of the pair of upper and lower side molds.

In addition, another method of using the vulcanization mold disassembly and assembly apparatus of the present invention is to disassemble the vulcanization mold using any of the above disassembly and assembly apparatuses.
While placing the vulcanization mold on the lifting table in the rising position, lowering the lifting table together with the vulcanization mold, the sector mold is positioned and supported from the outer peripheral side by the mold expansion / contraction means,
Next, while the sector mold is expanded and displaced by the mold expanding / contracting means, the upper side mold is removed, and the lower side mold is lowered by the operation of the lifting table while keeping the height of the sector mold as it is. The side mold is removed, and then the sector mold is reduced in diameter by the mold expansion / contraction means.

According to the vulcanizing mold disassembling and assembling apparatus of the present invention, the lifting table provided on the support base for bringing up and down displacement of the vulcanizing mold, and provided around the lifting table to support the sector mold from the outer peripheral side. Then, by the respective operations of the mold expansion / contraction means for displacing the sector mold, the disassembly operation of the vulcanization mold taken out from the vulcanizer and the subsequent vulcanization are performed as in the above-described method of using the disassembly and assembly apparatus. Assembling work of the vulcanizing mold placed in the machine can be done easily, reliably and in a short time regardless of the skill level of the operator, greatly improving the workability of disassembling and assembling the vulcanizing mold. As a result, it can contribute to the improvement of the tire production efficiency.
In addition, in this apparatus, in particular, by providing mold expansion / contraction means for expanding and contracting the sector mold in a state where the sector mold is supported around the lifting table, the upper and lower side molds are fitted to the sector mold. In addition, it is possible to sufficiently remove the possibility of damage to the mold, which is likely to occur when the upper and lower side molds are fitted or removed while facilitating the removal from the sector mold.

  Here, the mold expansion / contraction means is moved forward and backward to move the engaging claws engaged with pins protruding from the outer peripheral surface of each sector piece of the sector mold and the engaging claws in the radial direction of the sector mold under mutual synchronization. When it is configured with a drive mechanism, the pin provided on the outer peripheral surface of the sector piece as a connecting portion with the segment that causes the expansion and contraction diameter displacement of the sector mold disposed in the vulcanizer is used for disassembling and assembling the vulcanization mold. Since it can also function as a hooking portion with the hooking claw for displacing the sector mold, the vulcanization mold can be disassembled and assembled without changing the existing vulcanizing mold. be able to.

  According to the method of using the vulcanizing mold disassembling / assembling apparatus of the present invention, as described above, the disassembling / assembling work of the vulcanizing mold can be easily performed by the operations of the lifting table and the mold expanding / contracting means. The time required for disassembling and assembling work can be shortened and the labor can be reduced. The upper and lower side molds can be fitted to the sector mold and removed from the sector mold. By performing under the displacement, the possibility of occurrence of damage to the mold can be sufficiently removed, so that the deterioration of the quality of the product tire due to the damage of the mold can be effectively prevented.

It is a perspective view which shows embodiment of the disassembly / assembly apparatus of a vulcanization mold of this invention. It is a perspective view which shows the state which has arrange | positioned the vulcanization mold to the apparatus of FIG. FIG. 2 is a schematic vertical sectional view showing the apparatus of FIG. 1 with a half of a support base removed by breaking. It is a schematic side view of the apparatus shown in FIG. FIG. 5 is a view taken along the line AA of FIG. 4, showing the rotating ring of the apparatus of FIG. 1. It is a figure which shows the relative relationship of the inclination long hole provided in the rotation ring, and the guide hole provided in the upper side flat plate member of the laminated board. It is a longitudinal cross-sectional view which shows the process of decomposing | disassembling a vulcanization mold using the apparatus of FIG. FIG. 8 is a cross-sectional view showing a step that follows FIG. 7. It is a longitudinal cross-sectional view which shows the process of assembling a vulcanization mold using the apparatus of FIG. FIG. 10 is a cross-sectional view showing a step that follows FIG. 9.

Embodiments of the present invention will be described below with reference to the drawings.
The mold disassembling / assembling apparatus illustrated in FIG. 1 is provided on a support base 1 provided with legs at four corners of a laminated plate 1a having a square shape in plan view, and on the support base 1. As shown in FIG. 2, a lifting / lowering table 2 that moves up and down the vulcanizing mold 20, and a sector mold that is disposed around the lifting / lowering table 2 and supports the sector mold 21 of the vulcanizing mold 20 from the outer peripheral side. And a mold expansion / contraction means 3 for displacing the expansion / contraction diameter 21.
Here, as shown in FIG. 3, the laminated plate 1a of the support base 1 includes two upper and lower flat plates each having a through-hole in the substantially central region, as shown by breaking and removing a half of the support base. The members 1b and 1c are arranged so as to overlap each other at a required interval.

In this apparatus, as shown in FIG. 3, the lifting table 2 is provided with a screw jack 5 on the lower surface of the disk 4 provided in the through hole of the laminated plate 1a, and a driving force is applied to the screw jack 5. By providing the servo motor 6 that provides the above, the disk jack 4 and the vulcanizing mold 20 disposed thereon can be displaced up and down as required by the operation of the screw jack 5 and the servo motor 6. it can.
In addition, in the place shown in the figure, as a stroke guide of the disk 4 that is displaced up and down, linear bushes 8 that guide the vertical displacement of the shaft 7 attached to the lower surface of the disk 4 are provided at three locations around the screw jack 5. It is attached to a support arm 9 extending from the lower surface of the laminated plate 1a of the support base 1.

  In the illustrated embodiment, the mold expansion / contraction means 3 is disposed around the elevating table 2 and has a plurality of plate-like engaging claws formed by forming a U-shaped notch 9a at the upper end portion in the figure. 9 and a plurality of moving bases 10 arranged on the support base 1 and having two engaging claws 9 attached to the upper surface thereof, and the engaging claws 9, and more directly, each of the moving bases 10 are synchronized with each other. It comprises an advance / retreat drive mechanism 11 as shown in a side view of FIG.

According to such a mold expansion / contraction means 3, as shown in FIG. 2, the moving base 10 is disposed on the lifting table 2 in a state where the moving base 10 is advanced and displaced toward the lifting table 2 together with the plurality of engaging claws 9. Each of the engaging claws 9 is engaged with each of the pins 22 a protruding from the outer peripheral surface of the sector piece 22 of the vulcanization mold 20 with the notch portion 9 a, and the engaging claw 9 is advanced together with the movable table 10 by the advancing and retracting drive mechanism 11. The sector mold 21 can be expanded and contracted by displacing it out.
When the mold mold expansion / contraction means 3 supports the sector mold 21, the pin 22a of the sector piece 22 is firmly engaged with the engaging claw 9, so that the engaging claw is engaged with the pin 22a of the sector piece 22 as shown in FIG. It is preferable to provide a narrow-diameter constricted portion 22b that is fitted into the nine cutout portions 9a.

3 and 4, the advancing / retreating drive mechanism 11 is a rotation provided between the two flat plate members 1b and 1c of the laminated plate 1a so as to be rotatable around the center of the lifting table 2 in plan view. It comprises a moving ring 12 and translation drive means, for example, a power cylinder 13 that is drivingly connected to the rotating ring 12 to cause a certain amount of rotational displacement of the rotating ring 12 in the circumferential direction.
The power cylinder 13 is connected and fixed to the lower flat plate member 1c via a bracket.

Here, as shown in FIG. 5, inclined long holes 12a extending linearly in a direction inclined with respect to the circumferential direction are formed at a plurality of locations in the circumferential direction of the rotating ring 12 having an annular shape.
Further, here, the upper flat plate member 1b of the laminated plate 1a has a substantially radial direction of the rotating ring 12 at positions corresponding to the respective formation positions of the inclined elongated holes 12a of the rotating ring 12, as shown in FIG. A plurality of guide holes 1d extending in the direction are formed.

  Then, with each sliding rod 14 suspended and fixed from each of the moving bases 10 to which the hooking claws 9 are attached inserted into both the inclined elongated holes 12a and the guide holes 1d, the moving base 10 is moved to the upper flat plate member 1b. The sliding rod 14 is displaced from one end side to the other end side in the inclined elongated hole 12a based on the rotational displacement of the rotational ring 12 to which the driving force is applied by the power cylinder 13 by being arranged on the upper side. Accordingly, the sliding rod 14 is displaced in the radial direction of the rotating ring 12 together with the moving table 10 while being guided by the guide hole 1 d, so that the moving table 10 and the engaging claw 9 are arranged in the radial direction of the lifting table 2. Can move forward and backward.

  In addition, in order to smoothly perform such forward / backward displacement of the hooking claws 9, a rail member and a guide member as shown in FIGS. 1 and 2 are formed between the upper flat plate member 1 b and each moving table 10. A linear motion guide 15 can be provided, and a bearing that provides smooth sliding of the sliding rod 14 in the inclined long hole 12a can be attached to the lower end side portion of the sliding rod 14.

  By using the apparatus described above, a sector comprising a plurality of sector pieces 22 divided in the circumferential direction on the outer peripheral side of a pair of upper and lower side molds positioned opposite to each other in a posture surrounding the side molds. The vulcanization mold 20 provided with the mold 21 as shown in FIG. 2 can be easily and quickly disassembled after being taken out from a vulcanizer (not shown) and assembled before being attached to the vulcanizer. .

In order to disassemble the vulcanization mold using the above-described mold disassembling / assembling apparatus, first, as shown in FIG. 7A, a suspension member 30 for engaging a crane or the like (not shown) and the outer periphery of the sector mold The vulcanizing mold 20 integrated by the mold band 31 surrounding the side is arranged on the lifting table 2 in the rising position, and the latching claw 9 is advanced toward the lifting table 2 together with the movable table 10 by the advance / retreat drive mechanism 11. In the displaced state, the pin 22a on the outer peripheral surface of the sector piece 22 and the engaging claw 9 are aligned.
Here, the vulcanization mold 20 is attached with a suspension member 30 that penetrates the central region of the upper side mold 23 and connects the upper and lower side molds 23 and 24 together, and the sector mold 21 is surrounded by the mold band 31. By tightening from the side, the upper and lower side molds 23 and 24 and the sector mold 21 are integrated.

  Next, based on the operation of the lifting table 2, as shown in FIG. 7B, the vulcanization mold 20 is lowered together with the disk 4 to engage the small diameter constricted portion 22 b provided on the pin 22 a of the sector piece 22. It fits into the notch 9a of the claw 9 so that the respective pins 22a are engaged with the corresponding engaging claws 9, and the lower end of each sector piece 22 is brought into contact with the upper surface of the respective movable table 10. Thus, after the sector mold 21 is positioned and supported by the mold expansion / contraction means 3, the suspension member 30 and the sector band 31 are removed from the vulcanization mold 20.

  Then, the sector mold 21 engaged with the engaging claw 9 based on the operation of the advance / retreat driving mechanism 11, that is, the rotational displacement of the rotational ring 12 by the power cylinder 13, is slightly changed as shown in FIG. In a state where a small gap is formed between the sector mold 21 and the upper and lower side molds 23, 24, the upper side mold 23 is attached to a crane or the like as shown in FIG. The lifting and lowering table 2 is lowered together with the lower side mold 24 while maintaining the height of the sector mold 21 supported by the mold expansion / contraction means 3 while being lifted and removed from the sector mold 21. The mold 24 is removed.

Thereafter, as shown in FIG. 8C, the sector mold 21 is contracted and deformed by the mold expansion / contraction means 3, and the upper end portion of the sector mold 21 is brought into contact with each other with the plurality of sector pieces 22 in contact with each other. The storage ring 32 is attached to the machine, and the sector mold 21 is hung with a crane or the like and removed from the apparatus.
At this time, from the viewpoint of facilitating the mounting of the storage ring 32, prior to reducing the diameter of the sector mold 21, the illustration is omitted. The lower side mold 24 is once fitted to the lower end side of the sector mold 21, and the sector mold 21 of the sector mold 21 that is supported by the engaging claws 9 and the movable base 10 and deformed to expand and contract is inwardly folded. It is preferable to prevent disturbance of the arrangement posture.

  Further, in order to assemble the vulcanization mold using the mold disassembling and assembling apparatus, first, after placing the lower side mold 24 on the lifting table 2 in the rising position, for example, using a crane or the like (not shown), FIG. ), The elevating table 2 is lowered.

  Next, the sector mold 21 composed of a plurality of sector pieces 22 connected to each other by the storage ring 32 is used to align the pins 22a on the outer peripheral surface of the sector piece 22 and the engaging claws 9 by using a crane or the like. As shown in FIG. 9 (b), the constricted portions 22b of the respective pins 22a are fitted into the notches 9a of the engaging claws 9, and the respective pins 22a are engaged with the corresponding engaging portions. The sector mold 21 is positioned and supported from the outer peripheral side by the mold expansion / contraction means 3 under reduced diameter deformation by engaging with the claw 9 and bringing the lower end portion of each sector piece 22 into contact with the upper surface of the movable table 10. Then, the storage ring 32 is removed.

Subsequently, based on the operation of the advance / retreat drive mechanism 11, the sector mold 21 supported by the mold expansion / contraction means 3 is slightly expanded in diameter as shown in FIG. As shown, the lower side mold 24 is raised by the lifting table 2, and the lower side mold 24 is fitted from the lower side of the sector mold 21, and the upper side mold 23 is fitted from the upper side of the sector mold 21.
Here, prior to the upper side mold 23, when the lower side mold 24 is fitted to the sector mold 21, the mold expanding / contracting means 3 is used by fitting the lower side mold 24 to the lower end side of the sector mold 21. The arrangement posture of each sector piece 22 of the supported sector mold 21 becomes appropriate, and the subsequent fitting of the upper side mold 23 becomes easy.

  Thereafter, as shown in FIG. 10C, after the sector mold 21 is deformed and deformed by the mold expansion / contraction means 3, the sector mold 21 is fitted to the outer peripheral side of the pair of upper and lower side molds 23, 24. For example, the mold band 31 and the hanging member 30 are attached, and this is hung with a crane etc. and removed from the apparatus.

When the vulcanization mold disassembly and assembly apparatus of this invention was prototyped and the vulcanization mold was disassembled and assembled, when the apparatus was used, the time required for disassembly and assembly was 20 minutes and 25 minutes, respectively. On the other hand, when it was performed manually without using the apparatus, it was 40 minutes and 45 minutes, respectively.
Therefore, according to the mold disassembling / assembling apparatus of the present invention, it has been found that the time required for disassembling / assembling can be shortened to about half compared with the case of performing manually.

DESCRIPTION OF SYMBOLS 1 Support stand 1a Laminated plate 1b Upper flat plate member 1c Lower flat plate member 1d Guide hole 2 Lifting table 3 Mold expansion / contraction means 4 Disc 5 Screw jack 6 Servo motor 7 Shaft 8 Linear bush 9 Support arm 10 Moving table 11 Advance / retract drive mechanism 12 Rotating ring 13 Power cylinder 14 Sliding rod 15 Linear guide 20 Vulcanizing mold 21 Sector mold 22 Sector piece 22a Pin 22b Constricted portion 23 Upper side mold 24 Lower side mold 30 Suspension member 31 Sector band 32 Storage ring

Claims (4)

Disassembling a vulcanization mold in which a sector mold composed of a plurality of sector pieces divided in the circumferential direction is disposed on the outer peripheral side of a pair of upper and lower side molds positioned opposite to each other in a posture surrounding the side mold. An apparatus for assembling,
A support table, a lift table provided on the support table for moving the vulcanization mold disposed up and down, and arranged around the lift table to support the sector mold from the outer peripheral side and to expand and contract the sector mold An apparatus for disassembling and assembling a vulcanization mold, comprising a mold expansion / contraction means for displacement.   The mold expansion / contraction means is composed of a hooking claw that engages with a pin protruding from the outer peripheral surface of each sector piece of the sector mold, and a forward / backward drive mechanism that moves each of the hooking claws in the radial direction of the sector mold under mutual synchronization. The disassembly / assembly apparatus for a vulcanization mold according to claim 1. In assembling the vulcanization mold using the vulcanization mold disassembly and assembly apparatus according to claim 1 or 2,
After placing the lower side mold on the lifting table and lowering the lifting table, the sector mold is disposed on the mold diameter expanding means, and the sector mold is supported from the outer peripheral side by the mold expanding / contracting means,
Next, in a state in which the sector mold is expanded and displaced by the mold expansion / contraction means, the lower side mold is raised and the lower side mold is fitted from the lower side of the sector mold, and the upper side mold is moved from the upper side of the sector mold. A method of using a vulcanization mold disassembly and assembly apparatus, in which the sector mold is contracted and displaced by mold expansion / contraction means, and the sector mold is fitted to the outer peripheral side of a pair of upper and lower side molds. In disassembling the vulcanization mold using the vulcanization mold disassembly and assembly apparatus according to claim 1 or 2,
While placing the vulcanization mold on the lifting table in the rising position, lowering the lifting table together with the vulcanization mold, the sector mold is positioned and supported from the outer peripheral side by the mold expansion / contraction means,
Next, while the sector mold is expanded and displaced by the mold expanding / contracting means, the upper side mold is removed, and the lower side mold is lowered by the operation of the lifting table while keeping the height of the sector mold as it is. A method of using an apparatus for disassembling and assembling a vulcanized mold, in which the side mold is removed and then the sector mold is reduced in diameter by the mold expansion / contraction means.

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