SU598295A1 - Device for making rubber-cord tubular billets - Google Patents

Description

The invention relates to the production of tires for pneumatic tires and can be used in the manufacture of bracelets. A device is known for fabricating VIROD of cord-resonant tubular blanks, including assembly-mounted drum, winding unit and cutting unit i mounted on the base. In the known device, cutting the tubular billet into bracelets of a given width is carried out on the collecting drum with a disk knife rotating at high speed, while the relative movement of the door trim and the disk knife is made to {1 and cut along the perimeter. A disadvantage of the known device is the complexity of the design, the requirement for the drive to rotate the knife drive relative movement of the workpiece, drive the supply of a circular knife to the assembly drum. In addition to the known device, the cutting process is extended in time, since the cutting occurs sequentially around the circumference. The purpose of the invention is to simplify the design and increase productivity. In this device, the cutting unit is designed as racks mounted on a carriage moving along an axis of the drum, carrying radially movable sectors with arcuate blades interacting with annular grooves formed on the drum. FIG. 1 shows the device, a general view; in fig. 2 is a section A-D in FIG. one; .on FIG. Figure 3-5 shows the positions of the assembly drum and the cutting assembly, respectively, prior to operation, during operation, and after. The device comprises a base (not shown) on which the cutting unit 1, the assembly drum 2 with annular grooves (FIG. 3) and the unit: winding (not shown) are mounted. The cutting unit 1 is made in the form of several racks 3 located on a carriage 4 mounted on guides 5 and supporting sectors b with arcuate knives 7 fixed on sectors b by screws 8. The sectors are mounted between the stand 3 and the ring 9 rigidly connected by rods 10 passing through the guiding grooves 11 of the sectors 6. On the protrusion of the stand 3, a disk 12 is movably mounted with fingers 13 rigidly attached thereto that pass through the slots of the stand 3 into the copy grooves 14 of the sectors 6. The rods 10 and Horns 13 are set loose bushings 15 and 16. Disks 12 each second support 3 are interconnected rod 17 which is connected Charney-angles to the rod of the pneumatic cylinder 18. The device operates as follows. On the drum 2 (Fig. 3) wind the billet 1, join its ends. After that, by moving the carriage 4 along the guides 5, the device is pushed onto the drum so that the arcuate knives 7 are located opposite the annular grooves of the drum 2. Then the drum is opened, with the sectors of the drum moving radially, stretching the workpiece web 19 and pushing it onto the sharp edges of the arched knives 7. The workpiece is cut into bracelets, the knives freely enter the annular grooves without touching the drum surface. After that, the sector of the drum 2 is reduced to the center, and the arcuate knives are diluted, releasing the bracelets 20. The unclamping of the arcuate knives 7 occurs through the pneumatic cylinder 18, the force from which is transmitted to the disk 12 via the rod 17. grooves 14, pushing the sectors b, and with them arcuate knives 7.

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Claims (1)

hr. The radial expansion of the sectors 6 is ensured because they are made with two guide slots 11 through which the rods 10 pass. The return of the arcuate knives 7 to the initial position takes place after switching the pneumatic cylinder 18 to reverse. The proposed device design permits the simultaneous fit of bead rings to the drum of several tires, thereby increasing the productivity of assembly machines. An apparatus for making rubber-cord tubular blanks, including an assembly drum, a winding unit and a cutting assembly mounted on the base, characterized in that, in order to simplify the design and increase productivity, the cutting assembly is made in the form of a carriage mounted on a moving along the drum axis racks carrying radially moving sectors with arcuate blades interacting with annular grooves made on the drum. Sources of information taken into account in the examination 1. Patent СЧ1А, 3375151, cl. 156132, 1968.