SU570492A1 - Device for cutting film into longitudinal strips - Google Patents

Description

one

The invention relates to the processing of polymeric materials and can be used when cutting the film into longitudinal strips and then winding it.

A device for cutting nlenki into longitudinal strips is known, including a take-up roller n mounted in a housing and located above it in supports with the possibility of moving the clamping n cutting rolls rigidly interconnected 1.

In this device, the presser and cutting rolls are rigidly interconnected by a bracket, which in turn is pivotally mounted on an axis around which it can rotate and lift the presser and cutting rolls above the pickup while increasing the diameter of the cut film to be wound.

However, the presence of an additional axis complicates the design of the device.

In order to simplify the design in the proposed device, the support of the pressure and cutting rolls are installed in the vertical grooves made in the housing.

FIG. 1 schematically shows a general view of the device; in fig. 2 is a section along A-A in FIG. one; in fig. 3 is a section along BB in FIG. 2

The device comprises a swath 1 with circular knives 2 and a nip roll 3 with annular cuts under the blades of circular knives.

The device also has a take-up roll 4,

on which the annular attachments 5 are fixed by means of the tongue 6. On the annular attachments 5 during the cutting process a cut film is wound. The width of the annular nozzles is equal to the width of the strip of cut film. The ends of the film strips are attached to the ring-shaped nozzles 5 by means of a rod 7. The roller 4 is connected to an electric motor drive (not shown in the drawing) and is leading. The roller 1 with the circular knives 2 and the pressure roller 3 are connected to the mechanics by means of two removable strips 8 with openings in which the rolls supports 1 and 3 are included. The roller 1 with the circular knives,

The pressure roller 3 and the take-up roller 4 are installed in the same vertical plane.

The supports of the rolls 1 and 3 have the possibility of free movement along the vertical guide grooves 9, which are made in

case 10 devices. The pressure roller 3 connected to the roller 1 lies on the ring-shaped nozzles 5, ensuring that the cut film is pressed. Roll 4 is installed in the housing 10 using half disks 11.

The device also contains a feed roller 12 with a film wound on it. Constant tension of the film is created by the strip 13, which lies on the surface of the uncut film. Plank 13 has the ability to move in guide grooves 14 as

reducing the amount of film on the feed roll 12 during the cutting process.

The device works as follows.

The end of the strip of film is passed between the roller 1 with the disk knives 2 and the pressure roller 3. The film is cut by the knives 2 into strips which, bending the pressure roller 3 with the help of the rod 7, are fixed on the ring-shaped nozzles 5. winding the film on the PA nozzles already cut into strips.

Depending on the increase in the winding diameter of the film on the annular nozzles 5, the pressure roll 3 and two rolls 8 connected with it by means of two plates 8 roll 1 move vertically upwards in the guide grooves 9. The roll 3 lying on the cut film prevents the film from moving from the nozzles. After the end of the cutting, the roll 4 is removed from the housing 10, the rod 7 is removed and the nozzles 5 are removed from the roll 4.

The proposed device has a simple structure, is reliable in operation, and allows for high-quality winding of the cut film.

Claims (1)

1. US Patent No. 3096039, cl. 242-56.2, 1963. YU ar | t ± mon i :: i: ttlbi: t: 4: lrri zShshz Shg№rp / u -Hj fi.Z