JPH03261544A - Method and apparatus for automatic feeding and cutting of film material in tire molding process - Google Patents

Abstract

PURPOSE:To make it possible to automate each process and to attempt to improve productivity and working efficiency by providing a driving apparatus actuating back and forth a press roll and an pressure roll pinching a film material toward a molding drum and providing a cuttable part in the longer direction of a belt-like film material. CONSTITUTION:After both left and right side edge parts of a carcass constituting member 2 adhered on a tire molding drum 14 are wound up, the tip side of a belt-like film material P pinched by means of two rolls 11 and 12 is fed on the outer periphery between this pickup part and is contact bonded and the film material is wound up by rotating the tire molding drum 14 to a specified position. At the same time, each of left and right side wall constituting member T is adhered thereon and in addition, the tire molding drum 14 is rotated to the ending position of an adhering process of the side wall constituting member T. Under this condition, a cutting part X of the film material is automatically cut while it is held by means of a clamping apparatus of an unwind part. It is possible thereby to perform automatically processes from contact bonding, winding and cutting of the film material.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method and device for automatically supplying and cutting film material in a tire molding process, and more specifically, in a radial tire molding process. In order to facilitate the work of raising the structural members, film materials such as polyethylene sheets are automatically supplied in advance between the carcass structural members and the sidewall structural members, and wrapping is automatically carried out at the final stage of the process. The present invention relates to a method for automatically supplying and cutting film material in a tire forming process, and an apparatus therefor.

[Conventional technology]

Conventionally, in the molding process of radial tires, when performing side-over molding (a structure in which both sides of a tread component are covered with the tread side ends of a sidewall component), the fifth
As shown in the figure, it is necessary to lift (tear off) the tire center side end portions 1a of the left and right sidewall constituent members 1 of the first stage green tire W which have been deformed into a toroidal shape.

Therefore, in order to facilitate the work of raising the sidewall component 1, a polyethylene sheet has traditionally been placed between the carcass component 2 and the sidewall component 1 in the first stage green tire W forming process. A strip-shaped film material 3 such as the like is interposed.

In addition, in FIG. 5, 4 indicates a bead wire and 5 indicates a bead filler.

By the way, when interposing the strip film material 3, if the worker does it, the work efficiency is extremely low and it is impossible to improve productivity, so in recent years, the strip film material 3 is automatically inserted. A method of supplying it has been proposed.

For example, the tip of the strip film material 3 is attached to a green tire W.
As a method of crimping on the top, the blowing force of compressed air is used to press from above with a pressure roll. As a method of cutting the strip-shaped film material 3 at a predetermined position, there is a method of clamping and cutting pre-formed perforations in the film material 3 (Japanese Patent Publication No. 62-49853), and a method of cutting the strip-shaped film material 3 with a rotatable presser roll. A method of pressing the material onto a green tire, wrapping the film material around it by rotating a forming drum, and cutting it with a heat cutter.
1155) etc. are known.

[Problem that the invention seeks to solve]

However, conventional automatic feeding of film materials.

With the cutting method, the feeding position of the film material is limited with respect to the rotational direction of the forming drum, and it is difficult to feed the film material and attach the sidewall components at the same time, and the equipment is complicated. In addition, there was a problem in that it was difficult to reliably feed and cut the film material.

[Purpose of the invention]

This invention was devised by focusing on such conventional problems, and aims to improve productivity by automatically performing the process of crimping 9 wraps of film material and cutting it, and also improves productivity. An automatic method for supplying and cutting film material in a tire forming process, which can supply film material regardless of the direction of rotation, and can also supply film material and attach sidewall components at the same time. The purpose is to provide a device.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a device for unwinding and clamping a band-shaped film material on the side of a tire-forming drum, and a carcass affixed to the tire-forming drum. A film material supply device is installed that supplies a strip of film material while pressing it between the winding portions of the component, and this film material supply device includes a pair of left and right presser rolls that elastically clamp both sides of the leading end of the film material. and a pressure roll, and a drive device that moves the pressure rolls and pressure rolls forward and backward toward the forming drum, and in the longitudinal direction of the strip-shaped film material, there is a cutting section that can be cut by pulling. The gist is that these are provided at predetermined intervals.

[Action of the invention]

This invention is constructed as described above, and after winding up the left and right edges of a carcass component attached to a tire forming drum, a tip of a band-shaped film material sandwiched between two rolls is placed on the outer periphery between the rolled up parts. The tire forming drum is rotated to a predetermined position and the film material is wrapped around it, and the left and right sidewall components are crimped onto the upper surface of the drum, and the sidewall components are attached to the tire forming drum. is rotated to the final position of the process,
In this state, the cutting part of the film material is automatically cut while being held by the clamp device in the unwinding part, so that the process from crimping and attaching two rolls of film material to cutting can be performed automatically. It is.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a front view of a film material supply device 10 that supplies a strip-shaped film material P such as a polyethylene sheet according to the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a pair of left and right pressers. A side view of the roll 11 and the pressure roll 12 is shown, and the film material supply device 10 and the film material P
The unwinding clamp device 13 is the tire forming drum 14.
It is installed near the side of the

The film material supply device 10 includes a tire forming drum 1
A roll 16 for winding the film material P is installed on a frame 15 installed on the side of the frame 15, and a support 17 installed on the side of the frame 15 has a roll 16 as shown in FIGS. 2 and 3. As shown, two air cylinders 19a and 19b, which are referred to as advance/retreat drive devices, are mounted in parallel via brackets 1-18.

rod 20a of the air cylinders 19a, 19b;
The tip of 20b is connected to the presser roll 11 that operates independently on the left and right sides.
Play of the support frame 21 that supports and the pressure bonding roll 12)2
2a, 22b, and guide rods 23a, 23b.
The air cylinder 19a and the guide rod 23
c and 23d are arranged parallel to 19b.

The tips of the guide rods 23a, 23b, 23c, and 23d are fixed to the plate 22, and are inserted into bearings 24 attached to the bracket 18 to form the air cylinder 1.
It guides the expansion and contraction operations of 9a and 19b.

The presser roll 11 has a width equivalent to the width of the strip-shaped film material P, and has a bin 2 on the tip side of the support frame 21.
The support bracket 26 is rotatably supported via a shaft 27, and the support bracket 26 is rotatably supported via a shaft 27, and the support bracket 26 is pivoted clockwise by a spring 28 interposed between the support bracket 26 and the plate 22. is encouraged to do so.

Further, the pressure roll 12 is disposed horizontally below the presser roll 11, and is rotatably supported on the tip side of the support frame 21 via a shaft 29.

Therefore, the presser roll 11 is constantly in contact with the surface of the pressure roll 12 due to the elastic force of the spring 28, and the film material P is affixed to the tire forming drum 14 while being sandwiched between the presser roll 11 and the pressure roll 12. It is configured to be supplied while being pressed onto a carcass structure bottom member (not shown).

Further, an unwinding clamp device 13 for the film material P is installed at the bottom of the film material supply device 10, and this unwinding clamp device 13 has a completely different structure from the conventional structure disclosed in Japanese Patent Publication No. 62-49853. Similarly, the winding of the film material P is carried out on the roll 16 at the end of the process.
This serves to sandwich the film material P unwound from the film material P to facilitate cutting. That is, the upper and lower surfaces of the film material P, which has been wrapped, are held under pressure by clamp means (not shown).
By pulling the film material P, the film material P
It is designed so that it can be easily cut along a cutting portion X such as a perforation formed in the.

Further, a supply device (not shown) for supplying the sidewall bottom structure member T (side tread) onto the tire forming drum 14 is installed on the upper part of the film material supply device 10,
This feeding device uses a conventional device and is configured to move forward and backward to a predetermined position on the tire forming drum 14 and feed it onto the film material P.

Next, the automatic feeding and cutting method of film material P is shown in Figure 4 (
This will be explained with reference to a) to FIG. 4(d).

As shown in FIG. 4(a), after rolling up both the left and right brim portions of the carcass component attached to the tire profile drum 14,
The air cylinders 19a and 19b of the film material supply bag W10 are operated to extend and press the film material P held between the presser roll 11 and the pressure roll 12 onto the outer periphery between the winding parts.

A presser roll 11 and a pressure roll 1 are mounted on the tire forming drum 14.
2, the support bracket 26 supporting the presser roll 11 pivots upward about the pin 25 to release the film material P from being clamped, while the film material P is pressed against the tire by the pressure roll 12. Molding drum 1
4 is crimped.

From this state, as shown in FIG. 4(b), the film material P is sent out with the presser roll 11, and
4 to a predetermined position, that is, the supply position (fixed point position Q) of the sidewall component T, and wrap the film material P thereon, and at the same time, the left and right sidewall components T are supplied from the supply device to the upper surface and crimped. let

Further, from this state, as shown in FIG. 4(C), the air cylinders 19a and 19b of the film material supply device 10 are contracted from the tire forming drum 14 to retreat to the original position, and the tire forming drum 14 is rotated. At the end of the process, the sidewall component T is automatically cut by pulling the cut portion X of the film material P, such as the seam, while being held by the clamp device 13 of the unwinding portion. After cutting the film material P, as shown in FIG. 4(d), the feeding device for the sidewall component T is also moved back to its original position, and by repeating this operation, the film material P is cut automatically. Supply and automatic cutting are performed automatically.

〔Effect of the invention〕

Since this invention is configured as described above, the steps from crimping one roll of film material to cutting are automatically performed,
In addition to improving productivity, film material can be supplied regardless of the rotation direction of the forming drum, and film material supply and sidewall component attachment can be performed at the same time. This has the effect of significantly improving efficiency.

[Brief explanation of drawings]

Fig. 1 is a front view of a film material supplying device for supplying a strip-shaped film material such as a polyethylene sheet according to the present invention, Fig. 2 is a plan view of Fig. 1, and Fig. 3 shows a pair of left and right presser rolls. A side view of the pressure roll; FIGS. 4(a) to 4(d) are explanatory diagrams showing the automatic feeding and cutting method of film material; FIG. FIG. 2 is an explanatory diagram showing a supply method. 2... Carcass tight member, 10... Film material supply device, 11... Presser roll, 12... Pressure roll, 13... Unwinding clamp device, 14... Tire forming drum, 19a, 19b... Drive device (air cylinder), P... Strip film material, X... Cutting section of strip film material. Figure 1 Figure 2 Figure 0 Figure

Claims (1)

[Claims] 1. After rolling up the left and right edges of the carcass component attached to the tire forming drum, the leading end side of a band-shaped film material sandwiched between two rolls is placed on the outer periphery between the rolled up parts. The tire forming drum is rotated to a predetermined position and the film material is wrapped around it, and the left and right sidewall components are crimped onto the upper surface of the drum, and the tire forming drum is then moved to the end of the process of attaching the sidewall components. A method for automatically feeding and cutting film material in a tire forming process, in which the cut portion of the film material is automatically cut while being held by a clamp device in an unwinding section. 2. A clamping device for unwinding the strip-shaped film material is installed on the side of the tire-building drum, and the film is supplied while the strip-shaped film material is pressed between the rolled-up portions of the carcass component attached to the tire-building drum. A material supply device is installed, and the film material supply device includes a pair of left and right presser rolls and a pressure roll that elastically clamps both sides of the leading end of the film material, and forms the respective presser rolls and pressure rolls. A tire forming process characterized in that a drive device that moves forward and backward toward the drum is installed, and cutting sections that can be cut by pulling are provided at predetermined intervals in the longitudinal direction of the band-shaped film material. Automatic feeding and cutting equipment for film materials.