JP2003334866A - Method and apparatus for peeling unvulcanized rubber body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and certainly peel a filler 24 from the adhesion surface 14 of a molding plate 13. <P>SOLUTION: When a peeling member 32 is projected forwardly from the adhesion surface 14, a bead core B and the filler 24 are pushed by the peeling member 32 to be peeled from the adhesion surface 14 but, at this time, the filler 24 is closely bonded to the outer surface (front end surface) of the peeling member 32. Thereafter, the peeling member 32 is embedded inside from the adhesion surface 14 but, on the way of this, the filler 24 comes into contact with the adhesion surface 14 to be peeled from the peeling member 32. At this time, since the pressing force to the adhesion surface 14 of the filler is small, the filler is hardly bonded to the adhesion surface 14 and can be easily peeled. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a peeling method and apparatus for peeling an unvulcanized rubber body adhered to a contact surface of a support base from the contact surface.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for improving the uniformity of pneumatic tires. Therefore, the applicant of the present invention has disclosed in Japanese Unexamined Patent Publication No. 11-105155 that the smoothness of a disc-shaped support base rotating around an axis is smooth. We proposed a method and device for forming a rubber body (filler) by stacking multiple layers while spirally adhering a rubber ribbon made of unvulcanized rubber to the contact surface.

The rubber body (filler) molded as described above has a substantially uniform wall thickness in the circumferential direction, and
Since the shape is stable, it is possible to greatly improve the uniformity of the pneumatic tire, but the rubber body mentioned above is constructed by pressing unvulcanized rubber onto a smooth contact surface while adhering it. Therefore, it strongly adheres to the contact surface of the support base.

[0004]

In order to cope with such a strong adhesion, a large number of air ejection openings are formed on the adhesion surface of the support, and at the time of peeling the rubber body from the adhesion surface, the air ejection openings are formed. It has been proposed that high pressure air be jetted from a rubber body, but if a part of the rubber body adheres very strongly, peeling of the rubber body may fail or rubber may enter the air jet port. As a result, there is a problem that unevenness is generated on the surface of the rubber body.

It is an object of the present invention to provide an unvulcanized rubber body peeling method and apparatus capable of peeling a rubber body easily and surely from a contact surface of a support.

[0006]

[Means for Solving the Problems]
A peeling method for peeling a rubber body made of unvulcanized rubber that is in close contact with the close contact surface of the support base, wherein a peeling member inserted in a groove formed in the close contact surface of the support base is moved. The step of moving the groove in the depth direction of the groove so that the outer surface thereof is located on the same surface as the contact surface, and the rubber body is contacted to the contact surface and the outer surface of the peeling member located on the same surface as the contact surface. A step of moving the peeling member by the moving means so that the outer end portion of the peeling member protrudes from the contact surface, and peeling the rubber body from the contact surface; It can be achieved by a method for peeling an unvulcanized rubber body, which includes a step of moving the rubber body until it is immersed and peeling the rubber body from the outer surface of the peeling member.

Secondly, there is provided a peeling device for peeling a rubber body made of unvulcanized rubber which is in close contact with the contact surface of the support base.
When a rubber body is inserted into the groove formed on the close contact surface of the support base so as to be movable in the depth direction in the groove and the rubber body is brought into close contact with the close contact surface,
A peeling member having an outer surface located on the same plane as the contact surface, and a moving means for moving the peeling member in the depth direction of the groove, and moving means for peeling the rubber body from the contact surface of the support base. This can be achieved by an unvulcanized rubber body peeling device in which the peeling member is moved so that its outer end projects from the contact surface, and then the outer surface is moved inward from the contact surface. .

First, the peeling member is moved by the moving means in the depth direction of the groove so that the outer surface of the peeling member is located on the same surface as the contact surface of the support base. Next, the rubber body is brought into close contact with the contact surface and the outer surface of the peeling member located on the same surface as the contact surface. At this time, as described above, the outer surface of the peeling member is located on the same surface as the contact surface. Therefore, the peeling member does not form irregularities on the surface of the rubber body on the contact surface side.

Next, the peeling member is moved by the moving means so that the outer end of the peeling member projects from the contact surface. As a result, the rubber body is pushed by the peeling member, peeled off from the contact surface, and separated from this. In this way, the peeling member forcedly peels the rubber body from the contact surface,
Even if a part of the rubber body strongly adheres to the contact surface, it can be easily and surely peeled off.

During such peeling, since the outer surface of the peeling member is pressed against the rubber body, the outer surface of the peeling member is kept in close contact with the rubber body. However, the contact area between the outer surface of the peeling member and the rubber body is small. Since the contact area is smaller than the contact area between the rubber body and the contact surface, the overall contact force is smaller than when the contact surface is in contact with the rubber body.

Next, the peeling member is moved by the moving means until the outer surface of the peeling member is recessed inward from the contact surface. At this time, the rubber body moves together with the peeling member so as to approach the contact surface. However, since the movement is limited when the rubber body comes into contact with the contact surface, only the peeling member thereafter immerses inside the contact surface. As a result, the rubber body is forcibly peeled from the peeling member, but at this time, since the pressing force of the rubber body against the contact surface is considerably small, the rubber body hardly adheres to the contact surface, and the next step is easy. It can be carried out to the process.

According to the third aspect of the invention, the rubber body can be uniformly peeled with almost no deformation. Further, according to the fourth aspect of the invention, the bead core which is a rigid body and the soft filler can be integrally peeled from the adhesion surface, and the deformation of the filler due to the peeling can be suppressed. Further, according to the fifth aspect, the peeling member can be moved quickly and surely while the structure is simple and the manufacturing cost is low.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1, 2 and 3, reference numeral 11 denotes a fixed frame of a molding machine for molding a bead core with a filler. A horizontal rotary shaft 12 is rotatably supported by the fixed frame 11, and the rotary shaft 12 is illustrated. It receives the driving force from the drive motor and rotates. A molding plate 13 as a support is fixed to the front end portion of the rotary shaft 12 protruding from the fixed frame 11, and the molding plate 13 has a disk shape coaxial with the rotary shaft 12 and a radial center of the front surface thereof. The part becomes a smooth contact surface 14 to which a rubber body (filler) described later is adhered.

Reference numeral 17 denotes a plurality of radially extending guide rails laid on the rear surface of the molding plate 13, and these guide rails 17 are arranged equidistantly in the circumferential direction. A plurality of slide bearings 19 fixed to the movable plate 18 are slidably engaged with each guide rail 17, and as a result, the movable plates 18 can move in the radial direction while being guided by the guide rails 17. .

The rear ends of the gripping claws 20 extending forward are fixed to the outer ends of the movable plates 18 in the radial direction, and the front ends of these gripping claws 20 are through holes formed in the molding plate 13.
While penetrating through 21, it projects forward from contact surface 14 by a predetermined length. And these gripping claws 20 are
The ring-shaped bead core B is supplied to the molding plate 13,
When the movable plate 18 is brought into close contact with the close contact surface 14 while maintaining a coaxial relationship with the rotary shaft 12, the movable plate 18 is moved radially outwardly by a driving means (not shown) to be pressed against the inner circumference of the bead core B. The bead core B is strongly gripped from the inner side in the radial direction while centering.

On the outer side of the bead core B in the radial direction, a filler 24, which is an annular rubber body and is in close contact with the contact surface 14 of the molding plate 13, is attached, and the inner end of the filler 24 in the radial direction is the bead core B. It has the same thickness as the width, but becomes thinner toward the outside in the radial direction. Reference numeral 25 denotes a nozzle of an injection molding machine, and a rubber ribbon 26 made of high temperature unvulcanized rubber injected from the nozzle 25 is supplied to the contact surface 14 of the molding plate 13 and adhered while being pressed.

The above-mentioned filler 24 is composed of the rotating shaft 12,
By rotating the molding plate 13 and moving the nozzle 25 injecting the rubber ribbon 26 outward in the radial direction,
The rubber ribbon 26 is adhered to the contact surface 14 in a spiral shape, and the spiral attachment is performed plural times while overlapping in the axial direction. Thus, when the filler 24 is molded, the rubber ribbon 26 made of unvulcanized rubber is pressed against the smooth contact surface 14, so that the molded filler
24 is strongly adhered to the contact surface 14 of the molding plate 13.

Reference numeral 28 denotes a plurality of grooves formed on the contact surface 14 of the molding plate 13 and penetrating the molding plate 13 in the front-rear direction. These grooves 28 are radiused around the center axes of the bead core B and the filler 24. And are arranged at equal distances in the circumferential direction. The grooves 28 extend from a position slightly inside of the inner periphery of the bead core B in the radial direction toward the outer side in the radial direction to a position to the outside of the radial outer end of the filler 24 to some extent. As a result,
These grooves 28 are distributed and arranged almost uniformly in the contact area between the contact surface 14 and the filler 24.

Reference numeral 30 denotes a slider which is supported by a rotary shaft 12 between the fixed frame 11 and the molding plate 13 so as to be slidable in the axial direction (front-back direction). The slider 30 has a front end parallel to the molding plate 13. A disk-shaped movable body 31 is fixed.
A plurality of (the same number as the grooves 28) rectangular plate-shaped peeling members 32 extending in the front-rear direction are attached to the front surface of the movable body 31, and the peeling members 32 extend in the radial direction and are equidistant in the circumferential direction. Are arranged.

The peeling members 32 are formed so that their cross-sectional shapes are the same as those of the grooves 28, and the front ends thereof are slidably inserted into the corresponding grooves 28, respectively. As a result, when the slider 30 and the movable body 31 are moved in the front-rear direction while being guided by the rotating shaft 12, all the peeling members 32 attached to the same movable body 31 are synchronously moved in the groove 28 in the depth direction. To do.

Here, the outer surface 33 (front end surface) of the peeling member 32 is flush with the contact surface 14 when the filler 24 is molded by attaching the rubber ribbon 26 to the contact surface 14 as described above. Located on top. This allows the filler
No unevenness is formed by the peeling member 32 on the rear surface (side surface on the side of the contact surface 14) of 24, and the filler 24 having a good external shape can be obtained. At this time, the rear surface of the filler 24 also comes into close contact with the outer surface 33 of the peeling member 32.

Reference numeral 35 denotes a bracket fixed to the front surface of the fixed frame 11, and a central portion of a transmission link 37 extending in the radial direction via a pin 36 is swingably supported by the bracket 35. The inner part in the radial direction is bifurcated. Reference numerals 38 and 39 denote a pair of guide flanges formed on the outer periphery of the slider 30 behind the movable body 31, and these guide flanges 38 and 39 are rotatably provided at the radially inner end of the bifurcated transmission link 37. The supported guide roller 41 is in rolling contact.

Reference numeral 43 is a bracket fixed to the upper surface of the fixed frame 11. The tip of a piston rod 45 of a first cylinder 44 extending substantially parallel to the rotary shaft 12 is connected to the bracket 43. 46 is the first cylinder at the head side end
It is a second cylinder fixed to the head side end of 44 and coaxial with the first cylinder 44, and the tip of the piston rod 47 of this second cylinder 46 is connected to the radially outer end of the transmission link 37. .

When the piston rod 45 of the first cylinder 44 is linearly moved to the retract side stroke end, while the piston rod 47 of the second cylinder 46 is linearly moved to the protrusion side stroke end, each peeling is performed. The outer surface 33 of the member 32 is flush with the contact surface 14 as described above.

From this state, the piston rod 47 of the second cylinder 46 linearly moves to the retract side stroke end, and the piston rod 45 of the first cylinder 44 and the piston rod 47 of the second cylinder 46 both reach the retract side stroke end. Then, the transmission link 37 swings counterclockwise around the pin 36, and the slider 30, the movable body 31, and the peeling member 32 move forward while being guided by the rotating shaft 12.

As a result, the outer end portion (front end portion) of each peeling member 32 projects forward from the contact surface 14, but at this time, when the bead core B is released from the grasping by the grasping claw 20, the bead core B is released. And, a moving force forward from the peeling member 32 is applied to the filler 24. As a result, the soft filler 24 is integrally attached to the bead core B which is a rigid body.
The filler 24 is peeled off and the deformation of the filler 24 is effectively suppressed.

Here, as described above, a plurality of grooves 28 are formed substantially uniformly in the contact area between the contact surface 14 and the filler 24, and the peeling member 32 inserted in each groove 28 is attached to the same movable body 31. , All the peeling members by moving the movable body 31
If 32 is moved synchronously, the soft filler
The 24 can be uniformly peeled from the contact surface 14 with almost no deformation.

On the other hand, the piston rod 45 of the first cylinder 44
When both the piston rod 47 of the second cylinder 46 linearly moves to the stroke end on the protruding side, the peeling member 32 moves until the outer surface 33 (front end surface) of the peeling member 32 is recessed from the contact surface 14 into the groove 28. At this time, if the filler 24 is in close contact with the outer surface 33 (front end surface) of the peeling member 32, the filler 24 comes into contact with the close contact surface 14 when the peeling member 32 is retracted, and its movement is restricted. Is peeled off.

The above-mentioned first and second cylinders 44 and 46 can be driven by air or hydraulic pressure. The cylinders 44 and 46 as a whole have the peeling member 32 and the groove 28.
A moving means (48) for moving in the depth direction is constructed. Here, the moving means 48 is connected to the piston rod 45,
If 47 is composed of the first and second cylinders 44 and 46 that move linearly, the structure is simple and the manufacturing cost is low.
The peeling member 32 can be moved quickly and reliably.

Next, the operation of the embodiment of the present invention will be described. Now, the piston rods 45, 47 of the first and second cylinders 44, 46 are both located at the protruding side stroke end,
It is assumed that the outer surface 33 of the peeling member 32 is recessed inside the contact surface 14. When the first cylinder 44 is operated in this state and the piston rod 45 thereof is moved to the retract side stroke end, the transmission link 37 swings counterclockwise and the peeling member inserted in the groove 28 of the molding plate 13 is moved. 32 is its exterior
It moves in the groove 28 in the depth direction, here in the forward direction, until the 33 is located on the same plane as the contact surface 14.

Next, the bead core B is carried into the molding machine, fitted to the outside of the grip claw 20, and brought into contact with the contact surface 14. Next, the movable plate 18 is synchronously moved to the outer side in the radial direction by the driving means, so that all the grip claws 20 are pressed against the inner circumference of the bead core B, and the bead core B is gripped from the inner side in the radial direction while being centered.

Next, the rubber ribbon 26 made of high temperature unvulcanized rubber ejected from the nozzle 25 is attached to the contact surface of the molding plate 13.
It is supplied while being pressed against 14. At this time, the rotary shaft 12 and the molding plate 13 are rotated by the drive motor, and the nozzle 25 is moved outward in the radial direction.
Is adhered to the contact surface 14 and the outer surface 33 of the peeling member 32 located on the same surface as the contact surface 14 in a spiral shape. Then, such spiral attachment is performed a plurality of times while overlapping in the axial direction to form the filler 24 that is attached to the outer periphery of the bead core B and is attached to the contact surface 14 and the outer surface 33 of the peeling member 32.

At this time, as described above, the outer surface of the peeling member 32
Since 33 is located on the same surface as the contact surface 14,
The surface of the filler 24 that is in close contact with (the rear surface of the contact surface 14 side)
No unevenness is formed by the peeling member 32 on the
As a result, the filler 24 having a good appearance can be obtained.

Then, the movable plate 18 is slightly moved inward in the radial direction by the driving means to release the bead core B from the grip by the grip claw 20. Next, the second cylinder 46 is operated to move the piston rod 47 to the retract side stroke end. As a result, the transmission link 37 swings counterclockwise, and the slider 30, the movable body 31, and the peeling member 32 move forward while being guided by the rotating shaft 12.

As a result, the outer ends (front ends) of all the peeling members 32 are projected forward from the contact surface 14 in synchronization with each other. At this time, the bead core B and the filler 24 are pushed forward by the peeling members 32. Then, the bead core B, which is a rigid body, and the soft filler 24 are integrally adhered to each other because they move to the position shown by the solid line in FIG. 3 while being guided by the grip claws 20.
It is peeled off from 14 and separated from the contact surface 14. Since the filler 24 is forcibly peeled from the adhesion surface 14 by the peeling member 32 in this manner, even if a part of the filler 24 strongly adheres to the adhesion surface 14, it is easily and surely peeled off. be able to.

During such peeling, the outer surface 33 of the peeling member 32
Since the (front end surface) is pressed against the filler 24, the outer surface 33 of the peeling member 32 will continue to be in close contact with the filler 24, but the contact area between the outer surface 33 of the peeling member 32 and the filler 24 is the contact surface 14. Since it is smaller than the contact area with the filler 24,
The overall adhesive force is smaller than when the adhesive surface 14 and the filler 24 are in intimate contact. Next, the piston rod 47 of the second cylinder 46 is moved to the protruding stroke end, and the peeling member 32 is retracted until its outer surface 33 is flush with the contact surface 14.

At this time, since the filler 24 is in close contact with the outer surface 33 of the peeling member 32 as described above, the bead core B and the filler 24 are also pulled by the peeling member 32 and moved toward the close contact surface 14, The contact surface 14 is abutted. In this state, after inserting a plurality of grasping claws provided in the conveying means (not shown) into the bead core B, the grasping claws are synchronously moved outward in the radial direction, and the bead core B is grasped from the inside by the grasping claws.

Next, when the first cylinder 44 is operated to move the piston rod 45 to the protrusion side stroke end,
The peeling member 32 has an outer surface 33 as shown in phantom in FIG.
The (front end surface) moves until it is recessed in the groove 28 inside the contact surface 14, but at this time, the movement of the bead B and the filler 24 is restricted after the contact with the contact surface 14 as described above. Therefore, only the peeling member 32 sinks inside the contact surface 14, whereby the filler 24 is forcibly peeled from the outer surface 33 of the peeling member 32.

However, when the filler 24 is peeled from the outer surface 33 of the peeling member 32 in this manner, the contact area between the two is quite small as described above, and therefore the pressing force of the filler 24 against the contact surface 14 is also considerably small, and the filler 24 Is the contact surface
There is almost no close contact with 14. Next, the bead core B with the filler 24 grasped by the grasping claw is carried out to the next step by the conveying means. However, since the adhesion force between the filler 24 and the adhesion surface 14 is weak as described above, these are easily transferred to the next step. And can be carried out.

In the above-described embodiment, the bead core B with the filler 24 is peeled from the contact surface 14 of the molding plate 13, but the present invention can be applied to the filler only from the contact surface of the support base or by cutting. It may be used at the time of peeling the rubber sheet or the rubber sheet with a cord pressed against the anvil from the surface of the anvil.

Further, in the above-described embodiment, after the outer surface 33 of the peeling member 32 is projected from the contact surface 14, it is temporarily retracted until it becomes the same surface as the contact surface 14, and then it is recessed inside the contact surface 14. However, in the present invention,
It is also possible to project the outer surface of the peeling member from the contact surface and then immediately immerse it inside the contact surface. In this case, when the outer surface of the peeling member projects from the contact surface, the rubber body (filler) or the like may be gripped by the conveying means.

Further, in the above-mentioned embodiment, the bead core B with the filler 24 is grasped from the radially inner side by the grasping claw 20 and the grasping claw of the conveying means, but in the present invention, the bead core is attracted by the permanent magnet. Alternatively, the rubber body (filler) may be held by suction using a vacuum cup.

Further, in the above-described embodiment, the peeling member 32 is moved between the three positions by the first and second cylinders 44 and 46 whose head-side ends are joined to each other. May be moved between the three positions using a braked cylinder, a servo cylinder, or a screw mechanism, a rack and pinion mechanism.

[0044]

As described above, according to the present invention, the rubber body can be easily and surely peeled from the contact surface of the support base.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a view taken along the arrow I-I of FIG.

FIG. 3 is a partially cutaway front view of the vicinity of a bead core and a filler.

[Explanation of symbols]

13 ... Support base 14 ... Adhesive surface 24 ... Rubber body 28 ... Groove 31 ... Movable body 32 ... Peeling member 33… Outer surface 44, 46… Cylinder 45, 47 ... Piston rod 48 ... Moving means B ... Bead core

Claims (5)

[Claims] 1. A peeling method for peeling a rubber body made of unvulcanized rubber, which is in close contact with a close contact surface of a support, which is inserted into a groove formed in the close contact surface of the support. Moving the member in the depth direction of the groove by moving means to position the outer surface of the rubber member on the same surface as the contact surface, and the rubber member and the outer surface of the peeling member positioned on the same surface as the contact surface. And a peeling member is moved by the moving means so that an outer end portion of the peeling member protrudes from the close contact surface, and the rubber body is peeled from the close contact surface. And a step of peeling the rubber body from the outer surface of the peeling member by moving the rubber body from the inside to the inside of the peeling member to peel the unvulcanized rubber body. 2. A peeling device for peeling a rubber body made of unvulcanized rubber, which is in close contact with a contact surface of a support base, comprising a groove formed in the contact surface of the support base and a depth in the groove. Movably inserted in the direction, and when the rubber body is brought into close contact with the contact surface, a peeling member having an outer surface located on the same plane as the contact surface, and a moving means for moving the peel member in the depth direction of the groove. When peeling the rubber body from the contact surface of the support base, after moving the peeling member by the moving means so that the outer end portion of the rubber member projects from the contact surface, until the outer surface of the rubber member is immersed inward from the contact surface. An unvulcanized rubber stripping device, characterized in that it is moved. 3. A plurality of the grooves are formed substantially uniformly in a contact area between a contact surface and a rubber body, and a peeling member inserted in each groove is attached to the same movable body, and the movable body is moved by a moving means. The peeling device for an unvulcanized rubber body according to claim 2, wherein all peeling members are synchronously moved by performing the above. 4. The bead core, wherein when the rubber body is an annular filler attached to the outer peripheral surface of the bead core, the plurality of grooves are extended from the inner periphery of the bead core toward the outer side in the radial direction from the inner periphery. The unvulcanized rubber peeling device according to claim 3, wherein the filler is peeled integrally from the contact surface. 5. The peeling device for an unvulcanized rubber body according to claim 2, wherein the moving means is a cylinder in which a piston rod linearly moves.