SU441166A1 - Drum to machine for two-stage assembly of tires pneumatic tires - Google Patents

Description

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The invention relates to equipment for the tire industry and is intended for the assembly and molding of tires for pneumatic tires, for example of type P.

A drum for a machine for two-stage assembly of tires of pneumatic tires is known, which contains an elastic shell fixed with its ends on flanges mounted on a drive shaft and radially movable by means of power cylinders,. and radially sliding molding sectors interacting through a system of levers with disks moving along the drive shaft.

However, the known drum does not provide synchronization of the mix, flange and dilution of the mold, their sectors, which causes deformation of the moldable frame.

In order to provide synchronization of flange movement and dilution of the forming sectors in the proposed drum, the movable disks are provided with stops interacting with the pistons of the power cylinders.

The drum contains an elastic shell 1, its ends mounted on the flanges 2, mounted on the drive shaft 4 and radially movable by means of actuators 4, and radially sliding forming sectors 5, interacting through a system of levers 6 and 7 with movable along the shaft 3 discs 8. Movable flanges 2 are connected

by means of levers 9 with pistons 10 power cylinders 4. Inside the hollow shaft 3 a screw I passes through, which cooperates with nuts 12. At one end of the levers 6, there are jagged segments 13, which are engaged. The other ends of the levers 6 are pivotally connected with the levers 7. At the articulation of the levers 6 and 7, the rollers 14 are mounted. The other ends of the levers 7 are rigidly

mounted on the central protruding part 15 of the shaft 3. The disks 8 are provided with stops 16, which interact with the force 10 power cylinders 4.

The drum operation is performed as follows.

Unclench the drum to the diameter of the assembled frame. The pistons 10 move to the center of the drum, while expanding radially through the levers 9 flanges

2 to the desired diameter. At the same time, the pistons 10 abut against the adjustable stops 16 and move the disks 8, which, through the rollers 14, act on the levers 6 and 7, changing the angle between them. By changing the angle of the sectors

5 are radially moved apart to the diameter of the flanges 2. The gear segments 13 of the levers 6 ensure synchronization in the operation of the pairs of levers 6 and 7. After the assembly process is completed, the forming of the frame begins.

The screw 11, rotating, moves the nuts 12 and the cylinders 4 associated with them to the center of the drum. At the same time, the disks 8, which are in contact with the cylinders 4, through the stops 16 and the pistons 10 also move to the center. The discs 8 through the rollers 14 act on the levers 6 and 7, changing the angle between them. The forming sectors 5 are moved apart, producing a carcass molding. Simultaneously with the movement of the shaping sectors 5, the rollers 14 radially move along the disks 8, the profile of which is selected from the condition of preserving the length of the threads in the moldable frame.

After molding is completed, the drum is folded. To do this, initially the air moving the media 10 is vented. The elastic shell 1 through the forming sectors 5, the levers 6 and 7, the rollers 14, the disks 8 and the stops 16 acts on the pistons 10, returning them to their original position. The disks 8 move together with the pistons 10 up to the stop into the cylinders 4, choosing an existing gap and between them, the value of which is determined by the conditions for the output of the forming part of the drum from the frame without deforming the beads. Posu 9

When the disks 8 are pressed into the cylinders 4, the nuts 12, by turning the screw 11, return the cylinders 4 to their original position. In turn, the elastic shell 1 returns to its original position the forming part of the drum. Thereafter, the assembled tire is removed from the drum, and the cycle is repeated.

Subject invention

The drum to the machine for two-stage assembly of tires pneumatic tires, containing an elastic shell, with its ends mounted on the flanges mounted on the drive shaft and radially movable through power cylinders, and radially expanding the forming sectors, interacting through a system of levers with movable along the drive shaft disks, different that, in order to synchronize the movement of the flanges and dilute the forming sectors, the movable disks are provided with stops interacting with the pistons s cylinders. 2