JPS60143942A - Material pressure for tire molding machine - Google Patents

Abstract

PURPOSE:To effectively prevent the zig-zagged deformation of a tire constituent material by a method in which plural press rollers are wholly pressed only at the beginning of bonding the tire constituent material, and by using a part of the press rollers, only the longer peripheral portion is pressed. CONSTITUTION:The tip of a material W1 is sent out onto a tire constituent material W already bonded to the upside of a tire molding drum 100. Under the condition, only an adequate section is only pressed by both press rolls 21 and 42, and then a cylinder 30 is operated to turn a shaft 10, whereupon the press roll 42 is opened since the shaft 40 is separated from the direction of the drum by off-center amount beta set in the plate 12. The press roll 21 is continuously pressed by the cylinder 5. Afterwards, when the pressing process is completed, the arm 3 is pulled up by the cylinder 5, the roll 21 is opened, and the pressing operation is completed.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a material compression bonding device in a tire molding machine, and more specifically, it relates to a material compression bonding device for a tire molding machine, and more specifically, it compresses tire constituent materials wound around a tire molding drum according to the characteristics of the material. The present invention relates to a material pressure bonding device that can accurately bond materials.

[Prior art]

2. Description of the Related Art Devices shown in FIGS. 1(a) and 2(b) and FIGS. 2(a) and 2(b), for example, are known as material pressure bonding devices in conventional tire molding machines.

The material pressure bonding device shown in FIGS. 1(a) and 1(b) has already pasted another tire constituent material W on the tire forming drum 101 of the tire forming machine, and furthermore, the side tread is attached where the circumferential length is not uniform. The entire rubber strip Wl, which has a relatively wide inside area, is automatically pasted using a pressure roll 102 such as a sponge roll.

However, in the case of the above-mentioned pasting device, the tip of the rubber strip W1 can be pasted straight, but the subsequent long circumferential portion is caused by the difference in circumferential length causing the rubber strip W1 to move in the direction of the arrow. There was a problem in that it moved as shown and meandered.

In addition, in the case of the material crimping device shown in FIGS. 2(a) and 2(b), only the long circumferential portion is crimped with the narrow crimping roll 102, but in this device, especially rubber At the beginning of pasting of the strip W1, there was a problem in that the crimped part meandered and deformed in the number-visa direction (material feeding direction) due to the material pull-out resistance, making it impossible to stick the strip W1 uniformly.

The above-described deformation of the tire constituent material W is particularly noticeable when the polyethylene sheet 103 is used under the tire constituent material W.

[Purpose of the invention]

This invention was devised by focusing on the conventional problems, and its purpose is to press the entire tire component material only at the beginning of adhesion using a plurality of pressure rolls. A material crimping device for a tire molding machine that effectively prevents meandering deformation of tire constituent materials by using a part of the crimping roll to crimp only the long circumferential portion. This is what we provide.

[Structure of the Invention] In order to achieve the above object, the present invention provides an arm that is rotatable via an actuator on a base plate that can approach and leave the tire forming drum, and the tip of the arm is connected to the actuator. A rotatable shaft is provided, a rotatable pressure roll is provided on the shaft for pressure-bonding the tire constituent material wound around the tire forming drum, and the pressure roll is provided on an axis eccentric to the axis of the shaft. The gist of this is that

[Embodiments of the invention]

Embodiments of this invention will be described below based on the accompanying drawings.

In the following explanation, the above figures 1 (a), (b) and 2
Components that are the same as those of the conventional example explained in FIGS.

FIG. 3 is a side view of a material crimping device embodying the present invention;
FIG. 4 shows an enlarged side view of the main part, and 1 is a base plate whose material extraction position can be adjusted according to the width of the tire molding drum 100 and which can move toward and away from the tire molding drum 100. Reference numeral 2 denotes a boss attached to the base plate 1, and the arm 3 is attached to the boss 2 so as to be pivotable about a shaft 2a.

A cylinder 5 (actuator) is swingably attached to the upper part of the boss 2 via a plate 4, and the tip of the rod 5a of the cylinder 5 is connected to the arm 3 via a metal fitting 6 and a pin 7. installed.

A boss 8 is provided at the tip end 3a of the arm 3, as shown in FIGS. 3 and 4, and a shaft 10 is rotatably attached via a bearing 9. An arm fitting 11 is attached to the shaft 10, and the arm fitting 11 is attached to a plate 12 fixed to the other end of the shaft 10.
and fixed at an appropriate angle.

Further, a pressure roll 21 is rotatably mounted on the shaft 10 via a bearing 20. A sponge rubber layer 22 of appropriate hardness is provided on the surface of the pressure roll 21.

A cylinder 30 is swingably attached to the inside of the arm 3, as shown in FIG. ing. This allows shaft 1
0 means that the cylinder 30 (actuator) can rotate by a certain angle α degree as shown in FIG.

A shaft 40 is fixed to the plate 12 with a certain off-center amount β (eccentricity @) as shown in FIG. A pressure roll 42 is rotatably attached to the shaft 40 via a bearing 41. Like the pressure roll 21, the pressure roll 42 is provided with sponge rubber N43 having appropriate hardness and thickness.

In addition, in FIG. 3, Wl is the pressure roll 21.42
A wide rubber strip of tire molding material (
Materials) For example, side trends.

Next, the effect will be explained.

First, the material W1 is extracted using a suitable material extraction device (not shown).
As a result, the leading end is pushed out onto the tire constituent material W already pasted on the tire molding drum lOO. Since the tire molding material W pasted on the tire molding drum 100 has a cross-sectional shape as shown in FIG. 6, the material W1 pasted thereon is affected by the difference in circumference.

In addition, in the case of a structure called a side over tire structure, a poly sheet 130 is sometimes used to prevent the part of the side trend near the center from adhering, so the material can move more easily.

Under this situation, FIG. 6 shows a situation in which the tip of the material W1 is crimped.

Only the appropriate section in this state is covered with the pressure roll 21.42.
When the shaft 10 is rotated by crimping using both and then actuating the cylinder 30, the plate 12
Since the shaft 40 is moved away from the drum direction due to the off-center amount β set to , the pressure roll 42 is opened.

However, the pressure roll 21 continues to be pressed by the cylinder 5.

Thereafter, when the crimping process is completed, the arm 3 is pulled up by the cylinder 5, thereby opening the roll 21 and completing the crimping operation.

In the embodiment of the present invention, the pressure applied by the cylinder 5 to the pressure roll 21 via the arm 3 is increased, and the pressure applied by the cylinder 30 to the pressure roll 21 via the shaft 10, plate 12, and shaft 40 is reduced. However, by adjusting the pressure appropriately and reversing the pressure,
By changing the order of operation, the following operations can be performed.

That is, only the pressure roll 42 is crimped, then the pressure rolls 21 and 42 are crimped, and then only the pressure roll 21 is used for crimping.

Further, the pressure bonding is performed by the pressure bonding rolls 21 and 42, and then the pressure bonding is performed only by the pressure bonding roll 42.

In other words, crimping and non-crimping can be independently controlled for each.

〔Effect of the invention〕

This invention provides an arm that is rotatable via an actuator on the base plate that can approach and leave the tire forming drum as described above, and a rotatable shaft that is connected to the actuator at the tip of the arm, This shaft is provided with a rotatable crimping roll for crimping the tire constituent materials wound around the tire forming drum, and the crimping roll is provided on an axis eccentric to the axis of the shaft, so that a plurality of crimping rolls can be used. tire construction (by crimping the entire material only at the start of adhesion to prevent deformation of the material, and then by using a part of the crimping roll to crimp only the long circumferential part) Meandering deformation of the constituent materials can be effectively prevented.

Furthermore, since there are a plurality of pressure rolls on the shaft, the entire device can be manufactured compactly.

[Brief explanation of the drawing]

Figure i+a+, (BL and Figure 2 (al, fbl are conventional +7) JE pressure roll, explanatory diagram of the operation when tire constituent materials are compressed by this pressure roll, Figure 3 is a diagram showing the operation of the JE pressure roll in which the present invention is carried out. Fig. 4 is an enlarged side view of the main parts, Fig. 5 is a longitudinal side view of the crimping roll,
FIG. 6 and FIG. 7 are operation explanatory diagrams. 1...Base plate, 3...Arm, 11,40
...Shaft, 5,30...Actuator (cylinder), 21.42...Crimping roll, 100...
Tire forming drum, W, Wl...Tire constituent materials. Agent Patent Attorney Makoto Ogawa - Patent Attorney Ken Noguchi Teru Patent Attorney Kazuhiko Saishita Figure 1 (a) Figure 1 (b) 41 4J

Claims (1)

[Claims] A rotatable arm is provided on a base plate that can approach and leave the tire building drum via an actuator, a rotatable shaft connected to the actuator is provided at the tip of the arm, and the tire building drum is connected to the shaft. A material crimping device for a tire molding machine, characterized in that a rotatable crimping roll is provided for crimping tire constituent materials wound around the shaft, and the crimping roll is provided on an axis eccentric to the axis of the shaft.