SU1353659A1 - Roll-down device for pneumatic tyre assembly machine - Google Patents

Abstract

The invention relates to equipment for the manufacture of tires for pneumatic tires and can be used in assembling tires of radial design, in particular for the second stage of assembly of radial tires. The purpose of the invention is to improve the quality of rolling by providing air exhaust between the belt bracelet and the tread of the cargo tire blanks. For this, the central prikatny roller is made with a central cylindrical surface and with lateral conical surfaces. The width of the cylindrical part was chosen equal to from 0.7 to 0.9 of the total width of the working surface of the side packings. 3 il. f CO ate with C5 O1 co

Description

The invention relates to equipment for the manufacture of tires for pneumatic tires and can be used to assemble tires of radial design, in particular for the second stage of assembly of radial tires, during which the tire carcass is molded to a predetermined diameter, overlaid with a belt bracelet, cross-over parts and tread billet.

The aim of the invention is to improve the quality of stitching due to the provision of air exhaust between the belt and the tread of the loaded tires.

FIG. 1 shows the proposed device, a general view; in fig. 2 central stitching roller; in fig. 3 - a successive stage of rolling of elements of the coating.

The device contains mounted on base 1 on driven lead screw 2 with right and left threads side sticks 3 and 4 with a conical surface. The actuator 5 is designed to actuate the lead screw 2. Each side roller 3 and 4 actuates the drive in the form of pneumatic cylinders 6, installed at an angle equal to the angle of taper of the side rollers 3 and 4. L1 between the last center pivot roller 7, which is pivotally mounted to; and to the lever 8. The latter is pivotally mounted on the support 9 and the free end is pivotally connected to the power cylinder 10 mounted on the base-1.

Central stitching roller 7; - it is not with a central cylindrical surface of width H, chosen equal to 0., 7-0.9 of the width 2h of the working surface of the side packs 3 and 4, i.e. (0.7-0.9) 2h and with lateral conical surfaces of width h |.

The stitching device is mounted on a machine for assembly, which is made in the form of a supporting shaft 12 fixed at the base 11 and connected to the drive 13. On the supporting shaft 12 there is a movable template 14 for putting on a belt bracelet 15 and a hub 6 for brakes with left and right threads.

A disk 17 is mounted on the sleeve, and a disk 18 is mounted on the shaft 18. A diaphragm 19 is mounted on the disks 17 and 18. The automatic system controls the operation of the packs (conventionally not shown).

The device works as follows. The carcass 20 tires (Fig. 3 and 1), assembled in advance on the machine of the first stage of assembly, puts on the diaphragm 19 on the disks 17 and 18. Compressed air is fed into the cavity of the diaphragm 19 and the brake. The shaft 12 is rotated, while the left and right disks 18 and 17 begin to converge along the threads to the center, which ensures the formation of the frame 20 along

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the lid and its alignment with the central part of the belt 15, previously put on the template 14 by the collection operator. the workpiece 21 joins it, after which the central prikochatny roller 7 is turned on, the cylindrical part of width H of which is pressed by the power cylinder 10 to the outer surface of the tread workpiece 2 and tightly duplicates it from contiguous belt 21 and the conical side packs 3 and 4, which, when moving from the center, penetrate the full tread of the tread blank 21. The cycle of assembly operations is completed at the same time as the operation Remove the compressed air from the shafts of the diaphragm 19 and return to the initial position of the guide discs 17 and 18. The assembled tire is removed by the operator-collector and sent for vulcanization.

Making the roller 7 with the central and lateral surfaces allows, during the assembly of the truck tires, to carry out an intensive air removal in the center of the rolling of the tread billet 21 due to the fact that the width of the central part of the roller 7 is 0.7-0.9 of the total width of the working surface The lateral rollers 3 and 4. The wider cylindrical surface of the roller 7 does not allow for improved air retraction, since the wider the press surface, the more difficult it is to remove all the air from under it. A less broad cylindrical part of the roller 7 will not be sufficient to make good contact between the tread piece 21 and the belt bracelet 15. After removing the tire, the cycle is repeated.

Claims (1)

Invention Formula A device for stitching to a machine for assembling tires of pneumatic tires, comprising side mounts mounted on a base on a driving spindle with right and left threads, a drive for placing them in a working position, a drive for a spindle and a central stitching roller mounted between side sticks, hinged associated with the ram mounted on the base, characterized in that, in order to improve the quality of the stitching by providing air exhaust between the belt bracelet and the protector The cargo tire tires, the central prikochatny roller is made with a central cylindrical surface and with lateral cone313536594 surfaces, the width of the cy- 0.7-0.9 total width of the working surface of the lindrical part is chosen equal to the length of the side packs. nineteen 16Fi .1 ten FIG. g bi I Phi2.