SU422209A1 - Spreadable drum for tyre-assembling - Google Patents

Abstract

RELAXABLE DRUM FOR ASSEMBLY OF TIRES OF Pneumatic tires, including a group of segment strips mounted on radially movable sliders, forming a cylindrical drum surface, characterized in that in order to exclude the gaps between the segment strips in the unfolded state of the drum, the adjacent segment planes are designed with a different wrench, and the planes are of different widths, and the planes are different. wide! overlap the peripheral part of the adjacent straps by an amount not less than the width of their mutual linear movement during unclenching of the drum and are spring-loaded relative to the sliders.

Description

The invention relates to equipment for assembling tires for pneumatic tires and other rubber-cord shells on expansion drums, made in the form of a set of rigid segments, and can be used in the tire industry.

Expansion drums are known for assembling pokryashek pneumatic tires, including a group of segment strips mounted on radially movable - crawlers, forming a cylindrical drum surface.

However, in known devices, when their initial diameter increases (after unclamping), slits appear between the segment strips in the unlocked position. It is not always possible to reduce the size of these slots to a minimum due to an increase in the number of segment linings and other methods. The formation of the slits is not often the reason for the formation of

when crimping the assembled pokrtaki. Therefore, it is necessary to reduce the pressure of the crimping and increase the duration of the process. In the case of application of packs in the places of the cracks is not provided

. skating rink. When assembling pokrytek frames

type P in places of formation of cracks,

HS observed local stretching of the layers.

to

The purpose of the invention is to exclude the sheath between segmented strips in the disengaged state of the drum. This is achieved due to the fact that the intersectional strips are made

different widths, with the bars of greater width crossing the peripheral part of the bars adjacent to them by an amount not less than the width of their mutual linear movement when the drum is opened and springed relative to the sliders.

FIG. 1 shows an assembly drum, a general view; in fig. 2 is a section A-A in FIG. I; in fig. 3 wide segmented slat attached to the slider, total airfield; in fig. 4 is a section BB in FIG. 3

The drum consists of the main 1 and auxiliary 2 drums mounted on the shaft 3. The main drum 1 consists of a set of segment shoulders 4 and 5 fixed to the sliders 6, which through the levers 7 are connected to the pistons 8 of the drum radial opening. Above the shoulders are placed the segment bars 9 and 10 (see Fig. 1-3.) Of different widths alternating with each other. At the same time, the wider slats 9 overlap the narrow strips 10 adjacent to them with the peripheral part and are rigidly connected with the sliders with 6 screws 11. The wide slats are fastened with the fingers 13 with their wide head to the slit and the narrow head with 9 screws I2. slider 6.. To the slider 6, the finger with its wide head is pressed by the spring 14. To exclude the rotating bars 9 and 10, the latter with surfaces B

(see Fig. 4) the groove is partially inserted into the slider 6. The spring 14 also performs the function of a compensator for possible distortions and jolts during unclenching of the drum.

The drum works as follows.

When unclamping the drum, the sliders 6,

moving radially, the strips 10 also move, i.e. in turn, the radial bars 9 are moved until the slider 6, after passing distance 1, at the end of the unclamp reaches the bar 9.

Since the slats 9 are wider than the slats 10, during their movement radially during unclenching and during sliding over each other in the unlocked position

There are no gaps in the drum, since they remain closed slats. Thus, according to the invention, chink formation is eliminated, the operational capabilities of the drum become higher and it is possible to further improve the quality of the articles collected thereon.

N

Claims (1)

ADJUSTABLE DRUM FOR ASSEMBLY OF TIRES OF Pneumatic tires, including a group of segment strips mounted on radially movable sliders, forming a cylindrical surface of the drum, characterized in that to exclude gaps between the segment strips in the expanded state of the drum, adjacent segment strips are made of different widths, and the strips are larger in width overlap the peripheral part of the adjacent planks by an amount not less than the width of their mutual linear movement when expanding the drum and spring-loaded flax slides ·