SU468802A1 - Device for cutting blanks from a strip of polymeric material - Google Patents

Description

one

The invention relates to the field of tire industry and can be used to cut pieces of cord metal billets of steel cord used in the manufacture of tires pneumatic tires.

A device for cutting blanks from a strip of polymeric material is known, containing a frame with a carriage movable from the drive carriage mounted on the carriage, carrying a cutting tool mounted on a carriage rotating in the plane of the cut, arm brackets mounted on the carriage and clamp.

From the moment of cutting the blade, the cutting tool moves constantly in one direction, following the carriage on which it is mounted, while cutting the blade from edge to edge. In the case of cuttings on a known metal cord fabric, the cutting tool will find the ends of the steel cord and crush the edge, especially in those cases where the cut must be made at an angle to the edge.

The aim of the invention is to ensure the high-quality cutting of the steel cord fabric by cutting the cutting tool at some distance from the edge of the fabric and then cutting it.

This is achieved by the fact that the proposed device is provided with a spring-loaded carriage position lock relative to the frame cooperating with the pivoting bracket. FIG. I shows the described device, o, bshl {th kind; in fig. 2 - carriage with cutting tool; in fig. 3 is a section along A-A in FIG. 2

The device comprises a frame 1 hingedly mounted on a rack 2 with the possibility

rotation in the vertical plane from the actuator 3. On the frame 1 in the cylindrical guides 4 is mounted movable from the actuator 5, the sprocket 6 and the chain 7 the carriage 8 carrying the cutting tool 9, made in the form

a knife having sharp cutting edges 10 and a blunt edge 11 on both sides. The knife 9 is mounted on a bracket 12 which is rotatable in the plane of the cut, made in one piece with the axis 13 mounted on the carriage in

rolling bearings 14. The angle of rotation of the bracket 12 with the knife 9 is fixed by the rotation stops 15, 16 fixed on the carriage 8. The device is provided with a spring-loaded lock 17 of the position of the carriage 8 relative to the frame 1 fixed to the top of the frame. A clamp 18 is fixed in the lower part of the frame, and under the frame there is a table 19 on which the processed material 20 is placed.

The device works as follows. In the initial position, the carriage 8 is fixed with respect to the frame 1 by a spring-loaded latch 17. On the table 19, a metal cord 20 is laid, which is clamped by a clamp 18, having rotated the frame 1 from the actuator 3. Then the actuator 5 is turned on, which through the sprocket 6 informs the movement of chain 7 in indicated by the arrow B. The chain rotates the bracket 12 with the knife 9, which in this case will cut into the material 20 at some distance from the edge of the material. First, the blunt edge 11 of the knife 9 enters the work, which spreads the steel cord threads and provides an incision precisely between the threads, then with a further turn the sharp edge 10 of the knife enters the work. The cutting edge occurs until the bracket 12 reaches the rotation limiter 16, while the blade of the knife 9 does not extend beyond the edge of the material 20. Simultaneously when turning, the crown 12, will act on the spring-loaded lock 17, lifts it up, freeing the carriage 8 from fixing relative to the frame 1, as a result of which, under the action of the chain 7, the carriage begins to move to the right along the guides 4. In this case, the knife 9 will produce a piece of the workpiece already on its right side. After the completion of the working stroke, the actuator 5 is reversed, the chain 7 changes its direction of movement, the arm 12 with the knife 9 is turned up to the stop 15, and the carriage returns to its original position, in which the spring-loaded lock 17 is locked. frame 1 is rotated at an angle, freeing the material from the clamp. After the material has been fed to the required length, turning on the drive 3, the frame 1 is again rotated to the initial position and the cycle is repeated. The subject of the invention is a device for cutting blanks from a strip of polymeric material, comprising a frame with a moving carriage mounted on it in the guides, carrying a cutting tool mounted on a bracket that is rotatable in the cutting plane, bracket rotation stops attached to the carriage, and , in order to improve the cutting of the metal cord fabric by cutting the cutting tool at some distance from the edge of the fabric with its subsequent cutting, the device is equipped with a carriage clamped carriage position relative to the frame, interacting with the swivel bracket.

iS

20 19

FIG. one

Fig 2

A-A

12

/