JPS61148038A - Tire molding machine - Google Patents

Abstract

PURPOSE:To improve productivity of a tire by contriving shortening of a molding cycle, by a method wherein a molding green tire is supported on a tire transfer unit base in a longitudinal direction of a drum fitting shaft and a mechanism centering the green tire to a drum unit is provided on the upper part of an ascendable and descendable transfer rack. CONSTITUTION:A transfer unit base 20 is moved in the axial direction by a cylinder 10 and a transfer rack 24 raised by a cylinder of the inside of the base 20. Drum units 1a, 1b are in a closed state. Then a green tire W placed on the transfer rack 24 is pulled in the unit sides 1a, 1b. In this instance, the center of the tire W and the center of the units are coincidence with each other. Positioning of the green tire W is performed by pressing the tire W against a stopper roller 26 by a positioning cylinder 5 through a roller 6. Then the drum units 1a, 1b are made open and the tire W is held by the drum.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tire molding machine, and more particularly to a tire molding machine that has a simple structure and improves tire productivity.

[Prior art]

Conventionally, in tire molding, reinforcing materials for the tire bead are
Wrapping operations such as endless finishing with a rubber sheet material into which a cord is inserted have generally been carried out on a tire molding machine.

In addition, in a method performed outside the tire molding machine, the bead portion of the green tire is held by a roller or the like, and the work is carried out by winding it up with a winding roller.

However, in the case of such conventional equipment, there is a problem that the entire equipment is large-scale, complicated, and requires expensive equipment, resulting in a large cost for production equipment. Because the work of rolling in the rubber sheet material and the other tire molding processes were not carried out at the same time, there was a problem in that productivity was poor.

[Purpose of the invention]

This invention was devised by focusing on such conventional problems, and its purpose is to be able to efficiently (produce) with a simple mechanical device, and to reduce the cost of manufacturing the machine. Furthermore, the process of rolling in the rubber sheet material and the other tire molding processes are separated, allowing both operations to be performed in parallel, shortening the molding cycle and significantly improving tire productivity. The present invention provides a tire molding machine that has the following features.

[Structure of the invention]

In order to achieve the above object, the present invention includes a drum device in which a rotatably driven drum mounting shaft is provided with an expandable and retractable drum unit, and a winding device for winding a sheet material around a formed green tire held by the drum unit. A tire molding machine comprising: a tire transfer unit base movable in parallel to the drum mounting shaft via a transfer means in the drum device; A transfer rack is provided that supports the mounting shaft so as to be movable in the longitudinal direction and can be raised and lowered via lifting means, and a centering mechanism is provided above the transfer rack for centering the green tire on the drum unit. This is a summary.

[Embodiments of the invention]

The present invention will be described in detail below based on the accompanying drawings.

FIG. 1 shows a side view of a drum device 1 in a tire molding machine embodying the present invention, in which fatlb is a pair of left and right expandable drum units, 2 is a drum mounting shaft, and is rotatably held by a bearing unit 3. has been done. The bearing unit 3 is supported by a frame 8, and the drum mounting shaft 2 is configured to be rotated by a geared motor 4 via transmission parts 4a, 4b such as a V-belt and a V-belt pulley. Reference numeral 5 denotes a green tire positioning cylinder constituting a centering mechanism, and a bracket 7 having a roller 6 is attached to the tip of a rod 5a. Further, the cylinder 5 is attached to the frame 8 similarly to the bearing unit 3.

Further, 9 is a base of the drum device, and a cylinder 10 (transfer means 10) is fixed to the lower side of the base 9. At the front and rear of this base 9, there are also wheels 11a and 11 for transportation.
b are attached in pairs on each side.

In addition, in FIGS. 1 and 2, 20 is the slide device 2.
1 is a tire transfer unit base that moves parallel to the main shaft 2.

This tire transfer unit base 20 slides in the horizontal direction by the cylinder 10. In addition, a plurality of cylinders (not shown) are built into the tire transfer unit base 20, and a transfer rack 24 is attached to the rod 22 via metal fittings 23, so that the transfer rack 24 can be moved up and down. It is now possible to move.

A plurality of rollers 25 are assembled on the transfer rack 24 so that the green tire W can be freely moved in the axial direction when the green tire W is placed on the transport rack 24. Further, a green tire positioning stopper roller 26 is attached to one end of the transfer rack 24 via a metal fitting 27.

In FIG. 2, 30a and 30b are so-called rotary cylinders that rotate the winding stitcher wheel 31;
The rotary cylinders 30a, 30b have a piston, a rack, and a pinion gear (not shown) inside, and have a speed control device 32 using oil at one end of the cylinder body.

By controlling the moving speed of the piston using the speed control device 32, stable rotational output can be obtained at low speeds.

FIG. 3 shows a winding device, with a rotary cylinder 30a
, 30b are fixed to movable bases 33a, 33b via metal fittings 34.

Further, a boss 35 is provided on each of the movable bases 33a and 33b, and a rotatable shaft 36 is attached to each of the bosses 35.

At the upper end of this rotatable shaft 36, frames 37a, 3
7b is attached, and the lower end is connected to rotary cylinders 302, 30b. Frame 37a, 3
There are cylinders 38 in each of the cylinders 7b, which are connected to the crimping arms 40 via fittings 39.

Also, the crimp arm 40 is attached to the frames 37a and 37b with pins 4.
1 so that it can swing. Crimp arm 40
The rotatable crimping wheels 31 are respectively attached to the upper ends of the rims.

The moving bases 33a, 33b are connected to the plates 50a, 5
It is fixed by a fixing bolt 51 via an elongated hole provided at 0b. Further, key grooves are provided between the movable bases 33a, 33b and the plates soa, 50b, respectively.
It can be moved only in the longitudinal direction of the key 52 via the key 52 fixed to one side.

The plates soa and sob are moved by moving blocks 53a and 5.
3b, and the movable blocks 53a, 53b
is the guide lot 54a.

It is movably mounted on 54b.

Further, the guide rods 54a and 54b are fixed on the base 9 via a bracket 55.

Handles 56a and 56b are attached to the bracket 55, respectively. The handles 56a, 55b are connected to the handles 56a, 55b and the feed screw mechanism (not shown).
By rotating b, the moving blocks 53a, 53b
The position of can be adjusted. In other words, crimping wheel 3
The positions of rotation centers A and B of 1 can be adjusted to match the green tires.

Next, FIGS. 4 and 5 are a side view of the expandable and contractible drum units la and lb used in the drum device according to the present invention when the diameter is expanded, and a side view when the diameter is contracted.

4 and 5, 2 indicates the drum mounting shaft described above, and this drum mounting shaft 2 has a long key groove 2 in the axial direction.
a (see FIG. 6), and a boss 61 is attached via a key 60 so that its position can be adjusted.

A plurality of cylinders 62 are arranged on the boss 61,
A drum segment 64 is attached to the tip of the rod 63.

FIG. 6 is a sectional view showing a state in which a green tire W is held by a pair of drum units 1a and 1b.

A fixing bolt 65 is provided on the boss 61, and the drum unit can be fixed to the shaft 2 via a key 60 to prevent the drum unit from moving in the axial direction.

The positions of the drum units 1a and 1b are adjusted according to the internal position of the green tire W so that a gap α is created between the green tire W and the drum segment 64.

Also, bead reinforcing material 110 is attached to both shoulder portions W1 of the green tire W so as to be rolled up by this device.

Next, the operating sequence will be explained with reference to FIGS. 7(al) to 7(d).

First, in FIG. 7(a), the transfer unit base 20 is moved in the axial direction by the cylinder 10, and the transfer rack 24 is raised by the cylinder within the base 20. Further, the drum units 1a and 1b are in a "closed" state.

Next, in FIG. 7(b), the green tires W placed at arbitrary positions on the transfer rack 24 are transferred to the drum units la and lb.
It is pulled to the side. At this time, the center of the green tire W and the centers of the drum units la and lb are aligned. In this state, as shown in FIG. 7 (C1), the green tire W is pushed toward the stopper roller 26 by the positioning cylinder 5 via the roller 6.At this time, the green tire W is lightly pushed because it is on the roller 25. It can be moved, and the output of cylinder 5 is small enough.

As a result, the cylinder 5 can position the green tire W without deforming it.

Next, as shown in Figure 7(d), the drum mounting shafts) 1a, l
b is set to "open" and the green tire W is held by the drum. At this time, a gap α is set between the drum segment 64 and the inner surface of the green tire bead as shown in FIG. Tire W to drum unit la
, lb can be held correctly.

In other words, the green tire W made by the first stage molding machine
, the drum unit la of this device.

1b, since there is a gap α between the drum segment 64 and the bead inner surface of the green tire W, the bead portion W is caused by the friction between the drum segment 64 and the bead inner surface.
1 can be prevented from deforming and not being held correctly,
This allows the bead portion Wl to be held correctly without wobbling.

This allows the next winding operation to be performed correctly and easily.

Once the green tire W is correctly held on the drum units 1a, lb, the transfer rack 24 is lowered and the green tire W begins to rotate.

Next, as shown in FIGS. 8(a) to 8(d), the winding crimping wheel 31 is crimped by the cylinder 38 and rotated by the rotary cylinders 30a and 30b. Figure 8 (b) → Figure 8 (C) - Figure 8 (d)
), but at this time, the speed control device 32 built into the rotary cylinders 30a, 30b causes the wheel 31 to turn at a stable speed, so that it can be rolled in correctly. Further, as shown in FIG. 6, since there is a gap α between the drum segment 64 and the wheel 31, the drum segment 64 and the wheel 31 do not come into contact with each other, so that mutual wear and damage can be prevented.

In addition, in the states shown in FIGS. 8(b) and 8(d), the bead portion W1 is deformed by the crimping wheel 31,
Although there is a concern that it may not be rolled in properly, it is possible to roll it in well because the gap α is minute and the bead portion Wl itself is rigid.

When the winding work is completed, the drum rotation is stopped, the transfer rack is raised, the drum is ``closed'', the transfer rack is ``out'', and the seventh
The state shown in Figure (a) is reached, and the green tire W that has been rolled up can be taken out.

In the above embodiment, a pair of left and right expandable and retractable drum units la and Ib are used, but the invention is not limited to this, and an integrated expandable and retractable drum used in a general tire molding machine may also be used. good.

〔Effect of the invention〕

The present invention comprises a drum device having an expandable and retractable drum unit on a drum mounting shaft that is rotatably driven as described above, and a winding device for winding a sheet material around a formed green tire held by the drum unit. The tire molding machine is provided with a tire transfer unit base that is movable parallel to the drum mounting shaft via a transfer means in the drum device, and on the tire transfer unit base,
A transfer rack that supports the formed green tire so as to be movable in the longitudinal direction of the drum mounting shaft and can be raised and lowered via lifting means is provided, and above the transfer rack is a centering mechanism that centers the green tire on the drum unit. This enables efficient production with simple machinery and reduces machine manufacturing costs.Furthermore, by separating the rubber sheet material rolling process and other tire molding processes into separate processes, both can be done efficiently. Since operations can be performed in parallel, the tire molding cycle can be shortened and tire productivity can be significantly improved. Moreover, since it is a portable type, it is possible to efficiently operate the tire molding machine itself.

[Brief explanation of the drawing]

Fig. 1 is a side view of a drum device embodying this invention;
The figure is a front view of Fig. 1, Fig. 3 is a partially enlarged side view of the winding device, and Fig. 4 is an "open" view of the drum unit used in this invention.
5 is a diagram showing the "closed" state of the drum unit, FIG. 6 is a diagram showing a state in which one set of green tires is attached to the drum unit used in this invention, and FIG.
a) to FIG. 7(d) are operation diagrams of the tire molding machine, and FIG.
al to FIG. 8 (dl is an operation diagram of a winding device based on a pressure bonding wheel. 1...Drum device, la, lb...Drum unit, 10...Cylinder (transfer means), 20... Tire transfer unit base, 24...transfer rack, W...
・Green tires.

Claims (1)

[Claims] A tire molding machine comprising: a drum device having an expandable and retractable drum unit on a rotatably driven drum mounting shaft; and a winding device for winding a sheet material into a molded green tire held by the drum unit, the tire molding machine comprising: The drum device is provided with a tire transfer unit base that is movable parallel to the drum mounting shaft via a transfer means, and the formed green tire is supported on the tire transfer unit base so as to be movable in the longitudinal direction of the drum mounting shaft. A tire molding machine further comprising: a transfer rack that can be raised and lowered via lifting means, and a centering mechanism for centering the green tire on the drum unit above the transfer rack.