RU2621494C1 - Device for roll paper slitting cut - Google Patents

Abstract

FIELD: textile, paper.

SUBSTANCE: device is designed for longitudinal cutting of roll paper by means of a knife disk and contains a mechanism of pressing the knife disc and a winding roller with a drive. It is provided with a bracket with a thrust bearing, a strut and a handle for turning the bracket by at least 90° degrees around the vertical axis passing through the thrust bearing. In this case, the mechanism of pressing the knife disc is made in the form of tubes of square cross-section, and a knife disc - in the form of a slitting knife with the possibility of supporting the cut roll of paper at its upper point and is mounted with the possibility of an angular permutation on the shaft, cantilevered at a pipe of square section having an external telescopic guide in the form of a square tubing, mounted at the top point of the above bracket. The swivel is made fixed in the plane of the thrust bearing. Large longitudinal sections of tubes are oriented along the longitudinal and cross sections of the roll. The outer guide tube is provided in two cross sections with centering rollers for the inner tube provided with a pad with a load to allow the knife to be pressed to the roll.

EFFECT: simplified technology of the roll paper slitting cut and functional extension of the device.

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Description

The invention relates to a device for slitting roll paper.

As is known / see, for example, Shitov F.A. Paper and paperboard technology. M., "Higher School", 1978, 376 p. (p. 326-332) /, the main body of stationary slitting devices in the paper industry is the mechanism for slitting roll paper.

On existing slitting devices, paper is cut in two ways: by the scissor principle and by the pressure method.

According to the principle of scissors, the paper is cut with round knives, one of which is cup (plate), and the other is circular. Cup knives are mounted on a special shaft, which is driven into rotation by the drive. Circular knives are mounted on levers mounted on a pipe running across the machine. They are pressed against the cup knives by springs, do not have a drive and are driven into rotation by friction against the cup knives.

According to the pressure method, the paper is cut using a circular knife resting on the lower knife shaft along which the paper moves. Circular knives mounted on brackets are pressed against the shaft by springs or pneumatically.

The lower knife shaft consists of a pipe on which steel rings of high hardness are put on. It is driven from the drive shaft, and on some machines from a separate motor. On rings, the paper web is cut into strips of the required width.

The method of cutting paper by the principle of scissors gives a cleaner and smoother cut and provides greater wear resistance of knives than the pressure method, but is not suitable for cutting roll paper, since it involves two knives, one of which (cup) is mounted on a special shaft.

When cutting by pressure, difficulties arise in selecting the hardness of the rings and circular knives. If the hardness of the knives is higher than the hardness of the rings, then risks are created on them. When the hardness ratio is inverse, the knives become dull.

In addition, each of the known methods provides cutting of roll paper hung between the unwinding roll and the winding roller, which is not rational in production, where a common roll of paper is cut from one end of the roll to another into longitudinal strips of different widths and different lengths.

In order to eliminate the noted drawbacks in the device for the longitudinal cutting of roll paper by means of a circular knife, comprising a mechanism for pressing the circular knife and a winding roller with a drive, it is equipped with a bracket with a thrust bearing and a brace and a handle for turning the bracket at least 90 ° about a vertical axis passing through thrust bearing, while the mechanism of pressing the circular knife is made in the form of square tubes, and the circular knife is made of a plate with the possibility of support on the cut paper roll at its upper point and the possibility angle rotation on a shaft mounted cantilever on a square tube having an external telescopic guide in the form of a square tube mounted at the upper point of the bracket, the brace is fixed in the plane of the thrust bearing, large longitudinal sections of the pipes are oriented along the longitudinal and transverse sections of the roll, the outer guide tube is provided in two cross sections with centering rollers for the inner pipe, equipped with a platform with a load to ensure the knife is pressed against roll.

The technical solution proposed by the invention is illustrated in the drawing.

In the device of the invention, the longitudinal cutting of roll paper by means of a disk knife 1, pressed by a mechanism to the paper wound on a winding roller with a drive, the disk knife 1 is made of a plate type with the possibility of angular rearrangement on the shaft, mounted cantilever on a square tube 2 having an external telescopic a guide in the form of a square tube 3 mounted at the upper point of the bracket 4 with a thrust bearing 5 and a strut 6 (as in the drawing), there is a handle 7 for turning the bracket 4 by at least 90 around the vertical axis O-O passing through the thrust bearing 5, the strut 6 is fixed in the plane of the thrust bearing 5, the large longitudinal sections of the pipes (2 and 3) are oriented along the longitudinal and cross sections of the roll, the outer guide tube 3 is provided with centering rollers in two cross sections ( not shown) for the inner pipe 2, equipped with a platform 8 with a load to ensure technologically sound preloading of the knife 1 to the roll 9.

The technical solution proposed by the invention is implemented as part of the pressure method. At the same time, the disk-shaped knife 1 of the dish-shaped design does not rest on the lower knife shaft, as in the known prototype, but on a cut paper roll at its upper point. The possibility of angular permutation of the disk knife 1 on the shaft extends the life of the knife 1 with a single sharpening.

In this case, the disk knife 1, mounted cantilever on the shaft, is mounted on a square tube 2 having an external telescopic guide in the form of a square tube 3 mounted at the top of the bracket 4 with a thrust bearing 5 and a strut 6 (as in Fig.), There is a handle 7, the brackets 4 are turned at least 90 ° around the vertical axis O-O passing through the thrust bearing 5, the strut 6 is fixed in the plane of the thrust bearing 5, large longitudinal sections of the pipes (2 and 3) are oriented along the longitudinal and transverse sections of the roll, the outer direction The main pipe 3 is provided in two cross sections with centering rollers (not shown in the drawing) for the internal pipe 2, equipped with a platform 8 with a load to provide a technologically justified pressed knife 1 to the roll 9.

Thus, according to the applicant, the technical solution proposed by the invention is new, has an inventive step and is industrially applicable.

Claims (1)

A device for the longitudinal cutting of roll paper by means of a circular knife, comprising a mechanism for pressing the circular knife and a winding roller with a drive, characterized in that it is provided with a bracket with a thrust bearing and a brace and a handle for turning the bracket at least 90 ° about a vertical axis passing through the thrust bearing, in this case, the mechanism of pressing the disk knife is made in the form of square tubes, and the disk knife is made plate-shaped with the possibility of support on the cut paper roll at its upper point and the possibility of angular rearrangement and on a shaft mounted cantilever on a square tube having an external telescopic guide in the form of a square tube mounted at the upper point of the bracket, the brace is fixed in the plane of the thrust bearing, large longitudinal sections of the pipes are oriented along the longitudinal and transverse sections of the roll, while the outer the guide tube is provided in two cross sections with centering rollers for the inner pipe, equipped with a platform with a load to ensure the knife is pressed against the roll.

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