CN101254659B

CN101254659B - Building drum for green tire

Info

Publication number: CN101254659B
Application number: CN2008100061122A
Authority: CN
Inventors: 郑善锺
Original assignee: Hankook Tire Co Ltd
Current assignee: Hankook Tire and Technology Co Ltd
Priority date: 2007-02-14
Filing date: 2008-02-03
Publication date: 2010-09-29
Anticipated expiration: 2028-02-03
Also published as: KR100805330B1; CN101254659A

Abstract

The invention provides a shaping drum for green tires, which forms a green tire by winding the components of a structural tire, locating a tire ring, turning up, mounting a binding layer and encapsulating a tire thread. The shaping drum for green tires comprises a central part provided with a central panel with the main shaft as the reference, which is composed of a diad axis and provided with rotary shafts rotating axially at the left and right sides; left and right drums disposed symmetrically with the central part as the reference and having the same structure; and a saccate article kept by a vacuum ring of the left and right drums, the central panel of the central part contacts with the side rings of the vacuum ring via inclined conical surfaces. A tire shoulder disposed between the vacuum ring and a tire ring lock stop is provided with a passive conical surface contacting with the active conical surface of a first conical piston which moves forward and backward by pneumatic movement, moves upwards and downwards, the left and right drums are respectively provided with a cover ring which moves forward and backward along the main shaft by pneumatic movement, so as to cover or open the saccate article.

Description

Building drum for green tire

Technical field

The present invention relates at each parts of structure tire base on the volume and after tyre bead positioned, hold up (Turn up) and belt is installed and tyre surface encapsulates the building drum for green tire of making the tire base.

Background technology

Forming process in tire is made is that the structural material that will all be used for tire in order is installed on assembly drum designed operation of making cylindric tire base.

Here, the tire base is formed assembly drum designed in, according to European patent (EP) the 0th, 468, what proposed for No. 580 is assembly drum designed, exist the external diameter of central part and both sides drum poor, so that with the tire construction parts roll up in assembly drum designed and with front end with the terminal combination, but at this moment owing to exist circumference poor, therefore the operator must be manually installs the bound fraction of the pre-assembled (Pre Assembly) be made up of the sidewall (Side Wall) and the liner (Inner liner) of formed tire base, therefore pretty troublesome, in addition, because drum surface, both sides is covered by bladder, and this bladder still is the rubber material, therefore, not only about each drum inhomogeneous, and along with access times increase, itself flexibility decrease of this bladder rubber causes the inhomogeneous of circumference.

In addition, when the pre-assembled of the tire base initial stage of carrying out is installed, the part is positioned at bulging core, other are positioned at the bladder surface, assembly drum designed core is formed by stainless steel metal, and surface roughness is fine, so the inner liner portion of tire base can be installed on bulging surface by certain power or erecting device, but have a problem, the initial stage that is positioned at the parts on bladder surface installs and can't carry out smoothly.

In order to address this problem, can design the adherence of above-mentioned bladder well, but in this case, after holding up, be difficult to separate with tire material, in addition, after the tire base is shaped, must this tire base be pulled down from drum, because the effect of tyre bead detent pressure, therefore exist bladder to adhere mutually with tire material and the problem that is difficult to separate.

In addition, in the past assembly drum designed when holding up uses inclination rising mechanism that the inboard of bead part is supported, and at this moment rises with bladder and bead part produced flow, therefore can cause tire made-up article matter defective.

Summary of the invention

[07] the present invention is a kind of scheme of considering in order to solve above-mentioned problem points in the past, its purpose is to provide a kind of building drum for green tire, it is that benchmark is provided with the accessory cover drum that covers bladder in both sides with the central part, owing to possess identical the periphery that does not have the circumference difference with assembly drum designed central part, therefore, overlapping when the sidewall is engaged with liner (over lap) amount evenly, can improve quality thus, and the expansion height of the bladder that improves the bead part inboard is constructed in the rise and fall that utilize the tire shoulder supporting mass, the exchange loss that can improve the uniformity of tire and reduce central part.

[08] aforesaid the present invention is a kind of building drum for green tire, and it possesses: central part, and it is that benchmark has central plate to be made of the while diad at the main shaft that left and right sides possesses the rotating shaft of rotation vertically; About the drum, it is the benchmark balanced configuration with this central part and possesses same configuration; And bladder, it is held by the vacuum environmental protection that is arranged at drum about this; It is characterized in that, the central plate of above-mentioned central part is in contact with one another by the conical surface that tilts with the side ring of vacuum ring and is connected, be disposed at the tire shoulder supporting mass between this vacuum ring and the tyre bead locking, possess the passive conical surface that contacts with the active conical surface by pneumatic the 1st circular cone that moves forward and backward (corn piston) piston is arranged, carry out the rise and fall campaign, also have along main shaft by the pneumatic bezel ring, that moves forward and backward, so that cover and open above-mentioned bladder.

Description of drawings

Fig. 1 is the cutaway view of the initial conditions of expression building drum for green tire involved in the present invention.

Fig. 2 is the cutaway view that the action of (Turn up) state is holded up material among Fig. 1 in expression.

Fig. 3 is that part of the present invention enlarges cutaway view, is the cutaway view of structure of the central plate of central part.

Fig. 4 (A) is the cutaway view of the I-I line among Fig. 1, and Fig. 4 (B) is the cutaway view along the II-II line among Fig. 2, is the movement state diagram of tire shoulder supporting.

Fig. 5 (C)～(G) relates to operation step figure of the present invention.

Fig. 6 (H)～(J) is the cutaway view of the tire base that is shaped of figure and the expression of the greenware condition that is shaped of expression.

The specific embodiment

Below, in conjunction with the accompanying drawings preferred implementation of the present invention is elaborated.

Fig. 1 is the cutaway view of the initial conditions of expression building drum for green tire involved in the present invention, and Fig. 2 is the cutaway view of expression with the operating state under the material erected state.

In the present invention, left and

right sides drum

4a, 4b has same symmetric construction, and therefore same action only describes a drum.

The present invention is a kind of building drum for green tire, and it possesses: central part 3, and it is to be made of diad and to be that benchmark possesses central plate 2 at the main shaft 1 that left and right sides possesses vertically the rotating shaft of rotation; About the

drum

4a, 4b, it is the benchmark balanced configuration and possesses identical construction with this central part 3; And bladder 6, it is by being arranged at drum 4a about this, and the vacuum ring 5 of 4b keeps; It is characterized in that, the central plate 2 of above-mentioned central part 3 and the conical surface 8a of the side ring 7 of vacuum ring 5 by inclination, 8b is in contact with one another, be disposed at the tire shoulder supporting mass 10 between this vacuum ring 5 and the tyre bead locking 9, possess the passive conical surface 12b that contacts with active conical surface 12a, carry out the rise and fall campaign by pneumatic the 1st circular cone piston 1l that moves forward and backward, about drum 4a, also have on the 4b along main shaft 1 by the pneumatic bezel ring, that moves forward and backward 13, so that cover or open above-mentioned bladder 6.

On the other hand, Fig. 3 is the figure that enlarges the central plate 2 of expression central part 3, represented in anchor post 14 through spring 15 elastic bearings and by pneumatic and central plate 2 that rise and fall are moved, if it is pneumatic along direction of arrow effect, then piston 16 compresses spring 15 on one side, central plate 2 is risen, so the conical surface 8b of this central plate 2, rise and can supply with pressure medium 201 at material internal along the conical surface 8a of side ring 7.

Fig. 4 (A), (B) are that expression tire shoulder supporting mass 10 is by the figure of the 1st circular cone piston 11 at the state of radiation direction expansion.

In addition, above-mentioned bezel ring, 13 links into an integrated entity with the axis of the piston 19 that is connected in pneumatic channel pipe 17 by piston ring 18, so that move forward and backward along main shaft 1.

In addition, if trickle part function and structure involved in the present invention are described in more details, then the distance of the tyre bead 101 of the above-mentioned central part 3 of the kind of common corresponding tire is different, thus, tyre surface 102 and belt encapsulation 103 are installed shown in Fig. 6 (H), in order to sew up (stitching) this tyre surface 102,

drum

4a, 4b must be along main shaft 1 horizontal movements about both sides.

Therefore, in the present invention, if the central plate 2 of above-mentioned central part 3 arrives the conical surface 8a of side ring 7 through anchor post 14 rise and fall, then be positioned at the upper surface of side ring 7 as shown in Figure 2 via this conical surface 8a central plate 2, corresponding to tyre kind, encapsulating 103 position contacting both sides with tire belt, about the

drum

4a, 4b moves to the center, at this moment can be with the left and right sides distance minimization of 101 of tyre beads.In addition, the 2nd circular cone piston 20 among the figure is the parts that make 9 rise and fall of tyre bead locking by pneumatic action.

Adhesion describes operation step of the present invention with reference to Fig. 5 and Fig. 6.

Drum 4a about as shown in Figure 1, under the initial conditions of 4b, the pre-assembled 106 that mounting is made up of liner 104 and sidewall 105, and carcass 107 mountings that will be shown in Fig. 6 (I) are configured tyre bead 101 shown in Fig. 5 (E) after this pre-assembled 106.

Then, as mentioned above by tyre bead locking 9 is risen, tire shoulder supporting simultaneously 10 also uses the 1st circular cone piston 11 to rise, about the

drum

4a, 4b is that tighten up along the direction of arrow shown in Fig. 5 (F) at the center with central part 3, above-mentioned bezel ring, 13 direction to the left and right is open, and exert pressure medium 201 is fed into the tire base inside of shaping.

Then, shown in Fig. 5 (G), above-mentioned about

drum

4a, 4b shrink once more, bladder 6 is surrounded by shown in Fig. 6 (J) the tire base 108 that is shaped, and carries out the forming operation of tire base in assembly drum designed.

The related building drum for green tire of the invention described above has following advantage.

1) in drum in the past, about the drum covered by bladder, this shaping bladder is made by rubber, therefore each bladder and assembly drum designed central part and both sides drum can produce the circumference deviation, the front end of material can't be installed in the surface of bladder when the initial stage of pre-assembled (liner+sidewall) installed, therefore in conjunction with very difficult.

Yet, in the present invention, constitute the device that covers subring at the bladder that is installed on the drum of both sides, central part and the circumference between the drum of both sides of having eliminated drum are poor, it are reached unanimously, when preassembled front end engages with terminal, make its lap (Over Lap) even, and improved quality, in addition, can automatically engage.

In addition, this covers auxiliary drum, can't carry out the initial stage installation before, yet constitute by stainless steel (solid), therefore therefore can carry out the initial stage installation, in addition owing to carry out surface treatment, owing to vacuum pad can be arranged at this lid subring, the initial stage of therefore can automatically carrying out installs.

In addition, under the state of drum in the early stage, this piston assembly and tire shoulder are kept the circumference of uniform drum side by side, by the supporting bladder, can the external force from donor rollers of pushing of rousing top and engagement device etc. be supported, can carry out the semi-finished product of bending sufficiently by press fit, and can remove air residual (air trapping) between semi-finished product.

2) the tire shoulder supporting of supporting bead part is the structure that vertical lifting descends, therefore, after bladder expands, begin action, can prolong the life-span of bladder, owing to can improve the height that the bladder of this bead part inboard expands, therefore can keep the uniformity of tire.

3) be formed with the vacuum ring of the piston assembly that supporting is pushed to tire shoulder,, therefore can carry out preassembled automatic installation and joint owing to have the effect of preassembled liner portion installation of auxiliary initial stage.

4) form the assembly of drum central part, forms, form circle just and contain a plurality of corresponding tyre kinds and the tyre bead distance that changes, can reduce the replacing of central part and lose by a plurality of parts.That is, if the conical surface butt of central part and side ring, then the rising of this central part and parts moves on this side ring, and the distance between the tyre bead that central part then can change the specification according to tire is contained in certain scope (distance).

Claims

1. building drum for green tire possesses: central part, and it is that benchmark possesses central plate with the main shaft; About the drum, it is the benchmark balanced configuration with this central part and possesses same configuration; And bladder, it is held by the vacuum environmental protection that is arranged at drum about this, it is characterized in that,

Above-mentioned main shaft is made of diad and possesses the rotating shaft of rotation vertically at left and right sides,

The side ring of the central plate of above-mentioned central part and vacuum ring is in contact with one another by the conical surface that tilts, be disposed at this vacuum ring and tire shoulder supporting mass between the tyre bead locking and possess the passive conical surface that contacts with the active conical surface by pneumatic the 1st circular cone piston that moves forward and backward, above-mentioned tire shoulder supporting mass carries out the rise and fall campaign, about possess respectively along main shaft by the pneumatic bezel ring, that moves forward and backward on the drum so that cover or open above-mentioned bladder.

2. building drum for green tire according to claim 1 is characterized in that, above-mentioned central plate forms to be connected in the mode that is bearing in the piston in the anchor post by spring.

3. building drum for green tire according to claim 1 is characterized in that, above-mentioned bezel ring, is connected with the axis of the piston one that is connected in the pneumatic channel pipe by piston ring and forms, so that above-mentioned bezel ring, moves forward and backward along main shaft.