JPH0486248A - Automatic press-bonding method of tire constitutional materiel - Google Patents

Abstract

PURPOSE:To prevent the slip of tire constitutional pressure and also prevent the deformation of a tire constitutional material to be wound by successively pressing the tire constitutional material along a shape of the tire constitutional material by means of a plurality of pressing rolls that are different in its diameter and capable of rotating independently. CONSTITUTION:A tire constitutional material is successively press-bonded along the shape of a tire constitutional material W by means of a plurality of press- bonding rolls 19a, 19b, 19c that are different in its diameter and capable of rotating independently and, in particular, the tip of the tire constitutional material W (side wall) situated in the central side of a tire forming drum 1 and the boundary Wz of a polyethylene sheet 5 on a carcass material 2 adhered in advance onto a tire forming drum 1 are press-bonding simultaneously by the press-bonding rolls 19a, 19c. In this fashion, slips in the tip of the tire constitutional material W can be prevented and, accordingly, any deformation of the tire constitutional material W to be wound never occurs and thereby adherence is carried out stably at all times.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a method for automatically compressing tire constituent materials in a tire molding machine, and more specifically, the present invention relates to a method for automatically compressing tire constituent materials in a tire forming machine, and more specifically, the present invention relates to a method for automatically compressing tire constituent materials in a tire forming machine, and more specifically, the present invention relates to a method for automatically compressing tire constituent materials in a tire forming machine. The present invention relates to an automatic pressure bonding method for tire constituent materials that is accurately bonded according to their characteristics.

[Prior art]

In recent years, in the automatic pasting of tire constituent materials (for example, sidewalls), etc. in tire molding machines, deformation of the tip side of the tire constituent material has become a problem.

In particular, the tire forming method known as side overcap uses a polyethylene sheet on top of the tire constituent material (carcass), and then attaches and presses the sidewall on top of it, which causes problems such as slipping and large deformation. there were.

That is, the method of pasting tire constituent materials in a conventional tire molding machine is different from that of a tire molding machine, as shown in FIGS. 4(a), (b) and 5(a), (b), for example. A carcass 2 is pasted on the tire forming drum 1, and beads 3. In addition to attaching the rubber slip 4, a polyethylene sheet 5 is wrapped around the center of the tire forming drum 1, and where the circumference of the rubber slip 4 is not uniform, a relatively wide tire with a sidewall 6 is attached. The constituent material W was automatically adhered to the entire structure using a pressure roll 7 such as a sponge roll.

[Problems to be Solved by the Invention] However, in the case of the pasting method as described above, the tip portion Wa of the tire constituent material IIW can be pasted straight, but the subsequent long circumferential length There was a problem in that the tire constituent material W moved in the direction of the arrow due to the difference in circumferential length, resulting in meandering.

Furthermore, in the case of pasting using the pressure roll 7a shown in FIGS. 5(a) and 5(b), only the long circumferential portion is pressure-bonded with the narrow pressure roll 7a. At the beginning of wearing, the crimped part meanders and deforms in the servicer direction (material payout direction) due to material pull-out resistance.
There was a problem in that it could not be applied uniformly.

The deformation of the tire constituent material W as described above is particularly noticeable in the case of a method for manufacturing a side overcap tire in which the polyethylene sheet 5 is used under the tire constituent material W.

In addition, a method has been proposed in which multiple crimping rolls are arranged on one axis and each crimping roll is controlled to be crimped and released, but this method requires difficult control time and is mechanically complex. There was a problem.

[Purpose of the invention]

This invention was devised by focusing on the conventional problems, and its purpose is to use a plurality of pressure rolls to pressure the entire tire constituent material at the beginning of adhesion. It is an object of the present invention to provide an automatic pressure bonding method for tire constituent materials that can effectively prevent material deformation and perform highly accurate bonding with a simple structure.

[Failure to solve the problem]

In order to achieve the above-mentioned object, when tire constituent materials are crimped onto a forming drum by a plurality of pressure rolls having different diameters and which can rotate independently, one pressure roll presses the top of the tire constituent material. The other pressure roll simultaneously presses the inner edge of the tire constituent material located at the center of the tire forming drum and the boundary part between the tire constituent material that has been pasted, and maintains a uniformity at the beginning of pasting of the tire constituent material. By crimping only the section, the material can be applied accurately to the surface of the tire component material that has a cross section with an uneven circumference. By crimping only the section, the material can be accurately applied to the surface of the tire component material that has a cross section with an uneven circumference. The purpose of this is to paste the paper.

[Operation of the invention] The present invention is configured as described above, and by sequentially crimping the tire constituent materials according to the shape of the tire constituent materials using a plurality of pressure rolls having different diameters and which can rotate independently, slippage of the tire constituent materials is prevented. Therefore, there is no meandering deformation of the tire constituent materials, and stable attachment can be achieved at all times.

[Embodiments of the invention]

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

In the following explanation, the same components as those of the conventional example explained in FIGS. 4(a) and 5(b) and FIGS. 5(a) and 5(b) are designated by the same reference numerals, and the explanation thereof will be omitted.

FIG. 1 is a side view of a material crimping device embodying the present invention;
Figure 2 is a partially sectional plan view taken in the direction of the ■-■ arrow in Figure 1;
FIG. 3 shows a sectional view of the crimped state, and 10 is a base plate whose material ejecting position can be adjusted according to 1 of the tire building drum 1, and which can move toward and away from the tire building drum 1; A support member attached to the base plate 10 is shown, and the support member 11 includes an arm 12.
The proximal end of is attached so that it can pivot in the vertical direction.

A plate 13 is attached to the upper part of the support member 11, and a cylinder 14 (actuator) is swingably attached to the plate 13. Said cylinder 1
The tip of the rod 14a of No. 4 is attached to the arm]2 via a pin 15.

Therefore, the distal end side of the arm 12 is configured to swing in the vertical direction due to the operation of the cylinder 14.

The distal end portion 12a of the arm 12 has the markings shown in FIGS. 2 and 3.
As shown in the figure, a boss 16 is provided, and a shaft 18 is rotatably attached via a hair ring 17. A plurality of crimping rolls 19a, 19b', 1 made of sponge rubber or the like are attached to the shirts 1 to 18'' through a smoother 20.
9c is rotatably attached to this pressure roll 19a.

1.9b19c is configured such that the pressure roll 19a on the tip side of the shaft 18 has a large diameter, and the diameter gradually decreases toward the boss 16 side.

That is, the diameters of crimping rolls], 9a, 19b, and 19c are:
The pressure rolls 19a, 19b, 19c are applied with a wide tire constituent material W (sidewall 6) having a cross section with non-uniform thickness on the tire constituent material (rubber strip 4) that has been pasted on the tire forming drum 1 in advance. When automatically adhering via
9a and 19c are boundary parts between the tip of the tire constituent material W (sidewall) located at the center side of the tire building drum 1 and the polyethylene sheet 5 on the carcass member 2 that has been pasted on the tire building drum 1 in advance. Crimp Wz at the same time.

The crimping operation by the crimping rolls 19a, 19b, and 19c is performed by uniformly crimping only a certain section at the beginning of pasting with a sponge roll having a shape relatively similar to the profile of the tire constituent material W, which has a cross section with an uneven circumference. It can be applied evenly to the surface of wide tire constituent materials,
In addition, for the parts other than the beginning of pasting, the pressure rolls 19a, 19b, and 19c are released from the pressure bonding by the cylinder 14, and the tire constituent material W is pulled out and pasted.

As described above, the tire constituent material W is sequentially crimped according to the shape of the tire constituent material W by a plurality of crimping rolls 19a, 19b, and 19c which have different diameters and are rotatable independently.
a, 19c, the tip of the tire constituent material W (sidewall) located on the center side of the tire building drum 1, and the carcass member 2 that has been pasted on the tire building drum J in advance.
Since the boundary portion Wz with the second polyethylene sheet 5 is crimped at the same time, there is no slipping of the tip of the tire constituent material $4W, and therefore, no deformation such as meandering of the tire constituent material W occurs, and stable attachment is always possible. It is possible.

[Effects of the Invention] According to the present invention, when tire constituent materials are crimped onto a forming drum as described above using a plurality of pressure rolls having different diameters and which can rotate independently, one pressure roll is used to press the tire constituent materials against the forming drum. The top of the head is crimped, and the other crimping roll simultaneously crimps the boundary between the inner edge of the tire constituent material located at the center of the tire forming drum and the tire constituent material that has been pasted, and the tire constituent material is pasted. By crimping only a certain section at the beginning, the material can be accurately affixed to the surface of the tire component material, which has a cross section with non-uniform circumference.
It is possible to effectively prevent the deformation of the tire constituent materials at the beginning of pasting them, and it is also possible to apply the tire constituent materials without meandering along tire forming drums with different diameters and circumferential lengths.
Furthermore, the configuration is simple, the control can be simplified, and the pasting can be performed with high precision.

[Brief explanation of drawings]

FIG. 1 is a side view of a material crimping device embodying the present invention;
Figure 2 is a partially sectional plan view taken in the direction of the ■-■ arrow in Figure 1;
Figure 3 is a cross-sectional view of the crimped state, and Figures 4 (a), (b) and 5 (a), (b) show a conventional crimping roll and a tire component material crimped by this crimping roll. FIG. ■...Tire forming drum, 4...Rubber strip,
6...Side wall, 19a 19b 19c
...Crimping roll, W...Tire constituent material, Wx...
- Top of tire constituent material, Wz...boundary part.

Claims (1)

[Claims] In an automatic pressure bonding method for tire constituent materials, the tire constituent material having a cross section with a non-uniform thickness is adhered to the tire constituent material which has been attached in advance on a tire forming drum via a pressure roll made of an elastic material. When tire constituent materials are crimped onto a drum using a plurality of crimping rolls that have different diameters and can rotate independently, one crimping roll crimps the top of the tire constituent material, and the other crimping rolls press the tire forming material. By simultaneously crimping the inner edge of the tire component material located at the center of the drum and the boundary portion of the tire component material that has been pasted, and by crimping only a certain section at the beginning of pasting the tire component material, the circumference can be reduced. 1. An automatic pressure bonding method for tire constituent materials, characterized in that a material is adhered with high accuracy to the surface of a tire constituent material having a non-uniform cross section.