KR100331599B1 - Central Mechanism of Valcanization for Tire - Google Patents

Abstract

The present invention relates to a central mechanism of a tire vulcanizing device, wherein the bladder upper fastening ring 4a of the central mechanism for a vulcanizing device is assembled to the post 8 of the central mechanism, and the lower part of the post is a screw device. 11) discloses a central mechanism of a tire curator that is operated by a motor 10 installed at a lower portion thereof and can move up and down in accordance with a bead width of a green tire.

Description

Central Mechanism of Valcanization for Tire

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a central mechanism of a tire vulcanizer, and more particularly to a central mechanism of a tire vulcanizer, which can shorten the bladder replacement time of the vulcanizer and greatly simplify the apparatus.

In general, the tire vulcanizer is a combination of the carcass and the steel belt, bead, tread and the like to produce a bond between the rubber molecules through the method of pressing and heating the green tire to reduce plasticity over a wide temperature range or to reduce elasticity and tensile strength It is a device that can increase the tire's various functions. Such a heating and pressurizing device is generally called a vulcanizer or a vulcanizing device, and the tire before such pressurization and heating is performed is called a green tire.

Patent 164022 is a center mechanism of a tire vulcanizer capable of retracting replacement time of a bladder as a consumable. In general, when the green tire is put into the central mechanism in the vulcanizer, the upper part of the bladder is assembled with the upper ring and the cover and ascends upward as much as possible, and the lower part of the bladder is assembled with the lower ring and the lower bead ring. Elongated while being fixed to the mold, the bladder is shrunk by a separate vacuum device or the like to wait for the green tire to be easily inserted. When the green tire is added, the upper ring, which has been raised upward, is lowered by the cylinder of the central mechanism as disclosed in Patent No. 164022 to fit the bead width of the green tire, and mediates the low pressure gas or fluid introduced into the supply pipe. To inflate.

The expanding bladder is positioned precisely at the center of the open vulcanization mold inside the green tire fed into the central mechanism, and allows the upper portion pressed by the weight of the tire to be properly unfolded.

Since the upper fastening ring is assembled to the post and independent of the lower fastening ring by the cylinder, the up and down operation is possible, so that the expansion height of the bladder can be adjusted according to the bead width determined for each green tire standard. Known central mechanisms of such vulcanizers have a lower precision in their position control as the upper engagement ring is assembled to the post and operated by a cylinder operated by fluid. Accordingly, setting to the mold center position due to bladder expansion of the green tire and up and down expansion of the tire are uneven. Thus, the circumferential force variation, the lateral force variation of the tire, which is collectively referred to as the uniformity, which is the performance evaluation criteria of the finished tire, which is an elastomer, It is a factor of change in conicity.

In addition, by adopting the cylinder structure, the installation space becomes more than twice the operating length due to the characteristics of the cylinder, and the size of the device is increased. There is a disadvantage that the construction of the pit after the excavation.

Normally, the vulcanization bladder must be replaced after condensing the green tire with a certain number of consumables. Therefore, the replacement of the bladder has become a factor in which the apparatus cannot be operated in the meantime, many efforts have been made to reduce the replacement time, and various methods are known.

The central mechanism known from Patent No. 164022 includes driving means for elevating and swinging a plurality of clamp rods having a locking head at the upper end as shown in the drawing, thereby greatly reducing the time required for the operation of replacing the bladder. Provided a technology that can be shortened. However, in contrast to the simple function of fixing the lower bead ring to a mold, a number of complicated devices are required as known above, and the structure of the central mechanism becomes more complicated and enormous.

The present invention, in the tire vulcanization apparatus, expands the green tire put into the vulcanization mold in an appropriate shape and locates it in the center of the mold, and then presses the green tire into the mold through steam or nitrogen gas and performs a heat input function. To provide a central mechanism. In particular, the present invention has a simple structure, while increasing the degree of the center of the mold position of the green tire that plays an important role in the performance of the tire after vulcanization, and the center mechanism of the tire vulcanizer for minimizing the replacement time of the bladder as a consumable The purpose is to provide.

In order to achieve the above object, the center mechanism of the tire vulcanizer according to the present invention, in the center mechanism of the tire vulcanizer comprising a bladder upper fastening ring, a cover, a bladder lower fastening ring and a lower bead ring,

The bladder upper fastening ring is assembled to the post of the center mechanism while the lower part of the post is a screw device, and the screw can be moved up and down in accordance with the bead width of the green tire which is operated by a motor installed at the bottom of the vulcanizer. It is characterized by being.

Another embodiment of the center mechanism according to the present invention, the motor is characterized in that the position control of the upper fastening ring can receive the information detected by the position sensor and the potentiometer installed in the lower portion of the device.

Another embodiment of the center mechanism according to the present invention, in the center mechanism of the tire vulcanizer comprising a bladder upper fastening ring, a cover, a bladder lower fastening ring, a lower bead ring and a mold,

The mold is provided with a plurality of engaging grooves in a predetermined direction on the mating surface of the mold with the lower bead ring, and a plurality of clamp rods corresponding to the engaging grooves are provided on the mating surface with the mold of the lower bead ring. It is characterized in that the mold and the lower bead ring can be fastened or released by rotating the whole at a predetermined angle while the bladder is fastened to the apparatus.

1 is a front view of a state in which the bladder is inflated by using the central mechanism of the present invention;

2 is a front view of a state in which the bladder coupled to the center mechanism of the present invention is contracted and raised;

3 is a side view showing a central mechanism according to the present invention;

Figure 4 is a detailed view of the bladder coupling portion of the central mechanism of the present invention,

5 is a plan view of a mold applied to the central mechanism of the present invention.

* Explanation of symbols for main parts of the drawings

1: Mold 2: Green tire

3: bladder 4a: upper fastening ring

4b: Cover 4c: Lower Fastening Ring

5: lower bead ring 8: post

15: position sensor 16: potentiometer

17: encoder 18: hanging groove

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, in which like parts are designated by like reference numerals.

The present invention, as shown in Figure 1, the fastening means of the bladder upper fastening ring (4a), cover (4b), which is a fastening means of the bladder 3 for pressing the green tire (2) on the mold (1) of the vulcanizer The bladder lower fastening ring 4c and the lower bead ring 5 are provided. Using the fastening means of the bladder 3 to fix the bladder 3, the bladder upper fastening ring 4a is assembled to the post 8 so that the bladder upper fastening ring 4a can be operated according to the contraction and expansion height of the bladder. Motor 10 and screw 11 are provided. The lower part of the post 8 of the vulcanizer is engaged with the screw 11 so as to rise or fall as the screw 11 rotates.

In addition, a plurality of guide bars 14 are installed in the lower part of the body that constitutes the groove of the O-ring 13 to maintain a hole corresponding to the outer diameter of the post and the inner airtight so that the post 8 can be installed in the center. When the screw 11 rotates by 10), the precision and durability of the post which raises or lowers can be improved.

A position sensor 15, as shown in Fig. 3, is attached to the post 8 and the screw 11 fixed and rotated to the motor 10 to move up or down, and are located on the side of the post. A potentiometer 16 for measuring the position of the sensing sensor 15 was provided to automatically adjust the position control of the post by the motor.

Instead of the sensor 15 and the potentiometer 16 as an additional means for position control of the post may be automatically adjusted by installing an encoder 17 on the screw.

When applied to production in the actual field, it is possible to position the bladder fastening ring according to the bead width of the tire according to each tire specification in an automatic control device such as PLC, and operate by the cylinder mentioned in the description of the prior art. Solving the green tire expansion non-uniformity problem according to the positional deviation of the bladder fastening ring, by applying the motor and screw method according to the invention it is possible to constantly control the position of the bladder fastening ring set every operation, the finished product It is possible to improve the uniformity, which is a criterion for evaluating tire performance.

The consumable bladder 3 is usually assembled using the bladder upper fastening ring 4a, the cover 4b, the bladder lower fastening ring 4c, and the lower bead ring 5, as shown in FIG. As such, engagement or release with the mold 1 takes place.

When the green tire is introduced into the center mechanism and the bladder is inflated, the lower bead ring, which is the fixing means of the bladder, is fixed to the mold and the top of the mold is illustrated in the mold to minimize the replacement time of the bladder. As described above, a plurality of locking grooves 18 are provided in a predetermined direction with respect to the center of the mold 1. The lower bead ring 5 is formed with a plurality of clamp rods 19 corresponding to the engaging groove 18 on the lower surface to be coupled to the mold (1). When the bladder 3 is assembled by the bladder upper fastening ring 4a, the cover 4b, the bladder lower fastening ring 4c, and the lower bead ring 5, the whole is rotated at a predetermined angle. The clamp rod 19 is fastened to the locking groove 18 and can be released.

As described above, according to the present invention, the bladder upper fastening ring is assembled to the post in a state in which the bladder is fastened by the bladder fastening ring, the cover, the bladder lower fastening ring, and the lower bead ring. The motor and screw are always operated consistently to the bladder fastening ring position, which is adapted to the optimum expansion condition of the green tire, so that the green tire is always constantly inflated to improve the uniformity, which is the performance evaluation standard of the finished tire. Can be.

In addition, a plurality of clamping grooves provided in the mold and a plurality of clamp rods provided in the lower bead ring not only can replace the bladder easily and quickly, but also simplify the apparatus, thereby reducing manufacturing and installation costs.

Claims (4)

In the center mechanism of the tire vulcanizer comprising a bladder upper fastening ring, a cover, a bladder lower fastening ring and a lower bead ring, The bladder upper fastening ring is assembled to the post of the center mechanism while the lower part of the post is a screw device, and the screw is operated by a motor installed in the lower part so that it can move up and down to fit the bead width of the inserted green tire. The central mechanism of the tire vulcanizer. The center mechanism of claim 1, wherein the motor is configured to control the position of the upper fastening ring by receiving information detected by a position sensor and a potentiometer installed at a lower portion of the device. The center mechanism of claim 1, wherein an encoder is mounted on the screw, and the motor receives information from the encoder to control the position of the upper fastening ring. In the center mechanism of a tire vulcanizer comprising a bladder upper fastening ring, a cover, a bladder lower fastening ring, a lower bead ring, and a mold, The mold is provided with a plurality of engaging grooves in a predetermined direction on the mating surface of the mold with the lower bead ring, and a plurality of clamp rods corresponding to the engaging grooves are provided on the mating surface with the mold of the lower bead ring. And a mold and the lower bead ring can be engaged or released by rotating the whole at a predetermined angle while the bladder is fastened to the apparatus.