RU1781072C - Apparatus for cutting fins from tyre casings - Google Patents

Abstract

Usage: removal of extrusions from a wide range of tires. SUMMARY OF THE INVENTION: The device is equipped with a removable cam mounted on a bed. The holder of the trimming unit is made in the form of a pantograph and a swivel bracket. The holder is spring-loaded to the cam and mounted on the swivel bracket. The cam is mounted parallel to the swing arm. When the holder interacts with the rotary cam, the movement of the trimmer repeats the cam profile. During processing, predetermined optimum cutting angles are kept constant. 3 ill.

Description

The invention relates to equipment for the manufacture of pneumatic tires, in particular to equipment for removing pressings, for example, from tires.

A machine for trimming pressings on tire covers is known, comprising a centering expanding drum, drives for its rotation and longitudinal movement, a cutting device in the form of spring-loaded knives mounted on carriages enveloping the contours of the machined zones of the tire profile along the copiers.

A disadvantage of the known device is that it is possible to process tires of only one size on it.

The closest is a device for trimming extrusions from tires, comprising drive and pressure rollers mounted on a frame, an extrusion trim unit mounted at one end of a spring-loaded holder connected to the rotation drive.

A disadvantage of the known device is that when the spring-loaded rod with knives is rotated around the tire profile, the front and rear cutting angles of the knives change their value, which affects the quality of cutting.

The aim of the invention is to expand the technological capabilities of the device, by expanding the range of processed tires and improving the quality of trimming of the extrusions,

This goal is achieved in that the device for trimming the extrusions from the tires is equipped with a removable cam mounted on the bed, the holder of the extrusion trim unit is made in the form of a pantograph and a cantilever mounted swivel bracket, the holder

X | 00

and

About xj

Yu

one end is spring-loaded to the cam, and the other ends are fixed to the swivel bracket, while the cam is mounted parallel to the swivel bracket.

Figure 1 shows the proposed device, a General view; figure 2 - site trimming pressings; Fig. 3 is a section along aa of Fig. 2.

The device comprises a bed 1, drive rollers 2 mounted on the bed 1, a pressure roller 3, an electric drive 4, a pneumatic cylinder 5 connected to the roller 3. The device also includes a holder 6, made in the form of a pantograph. The pantograph consists of two rods pivotally connected on one side to a bracket 7 on which a clipping cutter assembly 8 is attached, and the other end of the rods is pivotally connected to a pivot bracket 9 of the clutch assembly moving mechanism, the rods being mounted parallel to each other.

A pneumatic cylinder 10 is attached to the upper rod of the pantograph, on the rod of which a roller 11 is fixed to interact with the removable cam 12. The pneumatic cylinder 10 is used to divert the pantograph, and therefore the trimmer, to the inoperative position.

The movement mechanism of the clipping cutting unit 8 is made in the form of a gear rack 13 connected to the rod 14 of the pneumatic cylinder 15, the gear 16. A rotary cantilever bracket 9 is mounted on the shaft on which the gear 16 is located. The trimming unit 8 is constantly pressed by the springs 17, 18 to the tire being machined 19 and the replaceable cam 12. The cutting tool 20 is pressed against the tire by the spring 21. The replaceable cam 12 has a profile corresponding to the profile of the tire being machined and is mounted parallel to the swing arm 9.

The device operates as follows.

In the initial position, the rod of the pneumatic cylinder 10 is extended. Node 8 is retracted.

The tire 19. from which it is necessary to cut off the extrusions is put on the drive rollers 2. After that, the device is turned on, the pneumatic cylinder 5 is activated, the pressure roller 3 is lowered and the tire is fixed 19 The pneumatic cylinder is triggered

10, its rod with a roller fixed at the end of the rod is pulled. The pantograph is lowered by the action of the springs 17, 18, the cutting tool 20 occupies the original working

position. The drive 4 is turned on. The tire 19 is rotated. The pneumatic cylinder 15 operates, through the rod 14, the rail 13 the movement is transmitted to the gear 16 and through the shaft to the rotary cantilever

to the bracket 9. The pantograph pivotally attached to the bracket 9 rotates around the tire profile 19, while the roller 11 slides along the removable cam 12 having the profile of the tire being machined, and the cutting tool 20 accurately follows the path of the roller. Having reached the extreme position, the rail 13 is returned to its original position, and consequently, a pantograph with a trimming unit

the pressings moves to its initial position. The pneumatic cylinder 10 operates on the pantograph and the trimming unit 8 is retracted to the idle position. The device is shutting down. The tire is removed from the device and

the cycle repeats. During operation, predetermined optimum cutting angles are kept constant.

The use of the proposed device for cutting vypressovok compared with

The prototype expands the range of processed tires on one device and improves the quality of trimming of the extrusions.

Claims (1)

The claims A device for trimming extrusions from tires, comprising mounted on the frame of the drive and pressure rollers, a unit for trimming extrusions mounted on one end of a spring-loaded holder, associated with a rotary drive, characterized in that, in order to expand the technological capabilities of the device by expanding the range of processed tires and improving quality trimming of the extrusions, it is equipped with a removable cam mounted on the bed, the holder of the trimming unit of extrusions is made in the form of a pantograph and a cantilever mounted swivel bracket, moreover, the holder at one end is spring-loaded to the cam, and the other end is fixed to the swing arm, while the cam is mounted parallel to the swing arm. 6 nineteen 10 1 headlight / flue g A-A 1-ЈL