JPH0213893B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a feeding/cutting device for film material in a tire forming process.

In the radial tire molding process, when performing side over molding (a structure in which both sides of the tread component are covered with the tread side ends of the sidewall components), the left and right sidewalls of the first stage green tire that has been deformed into a toroidal shape are It is necessary to pull up (tear off) each end of the component on the tire center side. Therefore, in order to facilitate this work of raising the sidewalls, it has traditionally been the case that the
As shown in the figure, a film-like material A, generally called a separation sheet, such as a polyethylene sheet, is interposed in advance between the carcass component C and each of the sidewall components F.

However, as previously described above, when interposing the film-like material A, the operator first supplies and attaches the edge of the film-like material A to a predetermined position on the outer circumferential surface of the carcass component C, while at the same time forming the film-like material A. After the drum 3 is rotated once to apply the film-like material A to the outer peripheral surface of the carcass component C over the entire circumference, an operator uses a hot scalpel to cut and separate the film-like material A, and then, As shown in FIG. 1, a sidewall component F is attached.

Conventionally, the work of pasting the film-like material A to facilitate the raising of the sidewall component F requires a lot of effort and is a factor that hinders productivity improvement and automation of tire forming. The current situation is that they have become one.

The present invention was developed as a result of studies to solve the above-mentioned problems.

Therefore, the object of the present invention is to provide the first green tire forming process in the radial tire forming process,
After winding up the left and right sides of the carcass component around the left and right bead wires, a film-like material is wrapped around the outer periphery between these rolled up parts at predetermined intervals in the width direction by means of facilitating cutting. At the final stage, by applying a tensile force in the longitudinal direction to the film-like material,
It is an object of the present invention to provide a supply and cutting device for film-like material in a tire forming process, which is capable of automatically cutting the film-like material at a location where the cutting facilitation means is applied.

That is, the present invention comprises a rack provided on the machine frame so as to move toward and away from the forming drum, and a means rotatably supported on the free end of the rack to facilitate cutting in the width direction at predetermined intervals. a film-like material unwinding reel around which the film-like material is wound; a clamp mechanism attached to the lower side of the free end of the rack to stop the unwinding of the film-like material when necessary; A fluid ejecting nozzle is configured to eject fluid to float the material toward the forming drum, and a free end of the rack is provided so as to be able to rise and fall so as to press the free end of the floated film-like material to the forming drum. The gist of the present invention is a supply and cut device for film-like material in a tire forming process, characterized in that it is constructed of a pressure roll and a pressure roll.

Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.

Figure 1 shows the first step in the radial tire forming process.
A side view cross-sectional explanatory diagram showing a stepwise green tire forming process, FIG. 2 is a perspective explanatory diagram showing a film-like material that has been provided with means for facilitating cutting in the width direction at predetermined intervals, and FIG. 3 is an embodiment of the present invention. 4 is a partially cutaway side view showing the essential parts of the above, FIG. 5 is an enlarged explanatory view of the lock, and FIG. 6 is a view taken along the line X-X in FIG. 5. Explanatory drawing, FIG. 7 is an enlarged cross-sectional explanatory drawing of the clamp part shown in FIG.
Figures a to d are explanatory front views showing the operation, and Fig. 9 is an explanatory side view cross-sectional view showing the state in which the film material is wound in the first stage green tire forming process.

In FIG. 1, reference numeral 3 denotes a green tire forming drum, on which various tire constituent members are wound. B is the innermost liner, C is the carcass, D, D' are the beads folded in at both ends, E, E' are the rim cushion rubber, F,
F′ is sidewall rubber. Further, A is a film-like material to be used in the apparatus of the present invention.

In FIGS. 3 and 4, G indicates a film-like material supply/cutting device in the tire forming process according to the embodiment of the present invention, in which the forming drum 3
A rack 1 is provided on a machine frame (not shown) so as to approach and separate from the rack 1, and a cutting facilitating means _A1 rotatably supported on the free end side of the rack 1 in the width direction at predetermined intervals. An unwinding reel 5 on which the applied film material A is wound, and a base 26a of the unwinding reel 5, which is positioned on the film material unwinding side and pivoted to the rack 1, swings to the unwinding side when necessary. swing bar 2
6, a clamp mechanism that is attached to the lower side of the free end of the rack 1 and stops unwinding of the film material A when necessary, and a clamp mechanism that directs the free end A _b of the film material A toward the forming drum 3 side. Fluid ejection nozzles 33 and 33' are configured to eject _fluid to make the material float up. It is composed of a press roll 27 that can be provided.

Furthermore, to explain this structure, the rack 1
The protrusion 1a protruding from the lower surface of the base side is pivoted to a hinge 2 fixed to the machine frame (not shown) at a certain distance from the forming drum 3, and is connected by an air cylinder (not shown). Tsute forming drum 3
By making it possible to swing against
The free end 1b of the molding drum 3 can be lowered (approaching the molding drum 3) or raised so as to be able to approach and separate from the molding drum 3.

4 is the shaft, 5 is the aforementioned unwinding reel,
6 is a free roller, 7 is a frame, 8 is a fixed side rubber plate, and 33 is a thumbscrew. The shaft 4 stores the unwinding reel 5 and is fixed to the rack 1. The free roller 6 is supported by a frame 7 fixed to the rack 1, and the fixed rubber plate 8 is bonded to the lower surface of the frame 7 in front of the free roller 6. These structures form a portion that holds the film-like material A (separation sheet).

9 is a rubber plate on the crimping side, 10 is a clamp bar, 11, 11' is a free roller, 12, 1
2' is the bracket, 13 is the frame, 14,1
4' is a cylinder case, 15, 15' are springs, 16, 16' are nuts, 30 is a piston, 3
1 is an O-ring, and 32 is a collar. The free rollers 11, 11' are secured to the frame 13 via brackets 12, 12', and together with the free roller 6 described above, constitute a portion for holding the film material A. The crimp-side rubber plate 9 is glued to a clamp bar 10, and both ends of the clamp bar 10 are guided by the slits of the brackets 12, 12'.
It is held so that it can slide in the direction of pressing the fixed side rubber plate 8 or separating it. The cylinder cases 14, 14' have a collar 32 on the frame 13,
The clamp bar 10 is crimped by supplying compressed air from an air supply port in the piston 30 fixed by nuts 16, 16'. Therefore, the stationary side rubber plate 8 and the compression side rubber plate 9 are pressed together by the cylinder cases 14, 14' to constitute the above-mentioned clamp mechanism. That is, when the air supply inside the cylinder cases 14, 14' is cut off, the compression side rubber plate 9 is moved to the fixed side rubber plate 8 by the springs 15, 15' whose both ends are supported by the frame 13 and the clamp bar 10.
Separate further. These form a braking device for cutting the film material A.

The aforementioned fluid ejection nozzles 33, 33' are fixed to the frame 13, and their blow-off ports are directed toward the free end side of the film-like material A, that is, in the direction of supply to the forming drum 3. The nozzles 33, 33' are not special, and in this embodiment, a plurality of air outlets are provided by bending a copper pipe and using cheese (piping parts, not shown). This has the important function of placing the film-like material A in the form of a windsock onto the carcass component C on the forming drum 3.

17 is a pin, 18 is a handle, 19 is a lock handle, 20 is a lock plate, 21 is a spring, 22 is a stopper, 23 is a bolt, and 24 is a pin. The handle 18 is fixed to the frame 13, and the lock handle 19 is swingably supported by the bracket 12' and the frame 13 about the pin 17. The lock plate 20 is attached to a slit portion of the frame 7, and a groove is machined into which one end of the lock handle 19 is inserted. The spring 21 is supported at both ends by the lock handle 19 and the bracket 12', and holds the lock handle 19 and the lock plate 20 together.

The stopper 22 is fixed to the bracket 12,
It is swingably supported by the frame 7 via the pin 24, and its range of motion is regulated by the bolt 23 and the frame 7. When the lock handle 19 is released from the lock plate 20 by grasping the handle 18 and the lock handle 19, the stopper 22, bracket 12, frame 13, and bracket 12' can swing around the pin 24. The free rollers 11 and 11' supported by these and the pressure side rubber plate swing in a direction away from the free roller 6 and the fixed side rubber plate supported by the frame 7, and the film material A is The work of attaching the device to the present device can be facilitated.

25 is an air cylinder, the tail side of this air cylinder 25 is supported by the rack 1, and the rod side is supported by the aforementioned swing bar 26 via a pin (not shown), and the swing bar 26 swings both ends to the rack 1. freely supported. By operating the air cylinder 25, the swing bar 26 can take a position in which the free end or tip of the film material A is folded in and a position in which it is released. This operation of the swing bar 26 has the effect of preventing the tip of the film material A from coming into contact with other devices when the device is on standby.

27 is a pressure roll, 28 is an arm, and 29 is an air cylinder. The arm 28 is a swingable support (not shown) on the rack 1, and the above-described rotatable pressure roll 27 is attached to the tip of the arm 28. The pressure roll 27 is operated by the operation of an air cylinder 29 whose tail side is supported by the rack 1 and whose rod side is supported by the arm 28. These constitute a pressure roll section.

In this example, perforations were made as shown in FIG. 2 as means _A1 for facilitating cutting on the film-like material A. Of course, it may be arranged so that when a longitudinal tensile force is applied to A, it is easily cut from this thin wall portion.

Next, the operation of this apparatus will be explained with reference to FIGS. 8a to 8d. FIG. 8a shows the device in standby mode. The rack 1 is located at a distance above the forming drum 3, and the film-like material A is folded in by a swing bar 26. FIG. 8b shows the start of the work of pasting the film-like material A. First, swing bar 2
6 swings upward, and the rack 1 swings downward to approach the forming drum 3 while the film material A is waving in the form of a windsock by air blowing from the fluid jet nozzle 33. FIG. 8c shows the start of wrapping the film-like material A around the carcass component C. When the air blowing is stopped when the rack 1 reaches its lower limit, the leading end of the film material A is placed on the carcass component C on the forming drum 3. Next, the pressure roller 27 is operated to press the tip of the film material A onto the carcass component C, and the forming drum 3 is rotated to begin wrapping. FIG. 8d shows the film-like material A being cut. The film material A is wrapped around the pressure roller 2.
7 and rotation of the forming drum 3, and when the portion to be cut to which the cutting facilitation means _A1 is applied comes to an appropriate position, the rotation of the drum is stopped and a brake is applied to the drum. Next, the cylinder case 1 mentioned above
By supplying compressed air into 4 and 14' and pressing the compression-side rubber plate 9 against the fixed-side rubber plate 8, the film-like material A between the rubber plates is clamped. When the rack 1 is raised in this state, the film-like material A between the carcass component C on the forming drum 3 and the rubber plate is removed.
A tensile force is applied to the material, and the material is cut at the portion to be cut. With this, the film material supplying and cutting operation is completed, and the process returns to the state shown in FIG. 8a described above.

As described above, the present invention includes a rack provided on the machine frame so as to approach and separate from the forming drum, and a rack rotatably supported on the free end side of the rack to facilitate cutting in the width direction at predetermined intervals. a film-like material unwinding reel on which a film-like material is wound; a clamping mechanism attached to the underside of the free end of the rack for stopping the unwinding of the film-like material when necessary; a fluid ejecting nozzle configured to eject fluid to float the free end of the rack toward the forming drum; Since it is composed of a pressure roll that can be raised and lowered, the left and right sides of the carcass component are rolled up around the left and right bead wires on the forming drum in the first stage green tire forming process in the radial tire forming process. A film-like material (separated sheet) with a means to facilitate cutting in the width direction at the required intervals on the outer periphery between the parts.
The free end of the carcass component can be automatically positioned at a predetermined position on the carcass component by lowering the rack and blowing the fluid from the fluid jet nozzle, while the free end is attached to the crimping roll. Therefore, since it can be pasted at a predetermined position, the feeding and winding of the film-like material onto the forming drum can be automated.

Furthermore, in the present invention, at the final stage of winding the film-like material onto the forming drum, the film-like material is fixed in the longitudinal direction by stopping the rotation of the forming drum, clamping the film-like material by a clamp mechanism, raising the rack, etc. A tensile force can be applied, and as a result, the film-like material can be automatically cut at the location where the cutting facilitation means is provided, that is, at the scheduled cutting location.

Therefore, according to the present invention, it is possible to automate the feeding and cutting operations of the film-like material to the forming drum, which facilitates the raising of the sidewall component, and it is possible to greatly improve productivity.

[Brief explanation of drawings]

Figure 1 shows the first step in the radial tire forming process.
A side view cross-sectional explanatory diagram showing a stepwise green tire forming process, FIG. 2 is a perspective explanatory diagram showing a film-like material that has been provided with means for facilitating cutting in the width direction at predetermined intervals, and FIG. 3 is an embodiment of the present invention. 4 is a partially cutaway side view showing the essential parts of the above, FIG. 5 is an enlarged explanatory view of the lock, and FIG. 6 is a view taken along the line X-X in FIG. 5. Explanatory drawing, FIG. 7 is an enlarged cross-sectional explanatory drawing of the clamp part shown in FIG.
Figures a to d are explanatory front views showing the operation, and Fig. 9 is an explanatory side view cross-sectional view showing the state in which the film material is wound in the first stage green tire forming process. 1... Rack, 3... Forming drum, 5... Unwinding reel, 27... Pressing roll, 33... Spraying nozzle, A... Film-like material, A ₁ ... Facilitation of cutting applied to film-like material means.

Claims (1)

[Claims] 1. A rack provided on the machine frame so as to approach and separate from the forming drum, and a film-like material rotatably supported on the free end side of this rack and provided with means for facilitating cutting in the width direction at predetermined intervals. an unwinding reel around which the film-like material is wound; a clamp mechanism that is attached to the underside of the free end of the rack and stops unwinding of the film-like material when necessary; It consists of a fluid ejecting nozzle that ejects fluid to cause the material to float, and a pressure roll that is movably provided on the free end side of the rack so as to press the free end of the floated film-like material to the forming drum. A supply and cutting device for film material in a tire forming process, characterized in that: