SU759342A1 - Apparatus for producing paper inserts from helically wound bands - Google Patents

Description

The invention relates to the manufacture of paper sleeves. The method of spiral navirka on liners and can be used in pulp and paper, printing and 5

other industries.

A device for manufacturing paper sleeves from helically wound ribbons is known, which comprises a hollow cylindrical mandrel having radial holes arranged along a spiral line and a pneumatic platform, wherein the spiral line is at an angle equal to the angle of winding in the direction opposite to 5

board winding tapes [1]. In the known device, an air cushion is created with a small flow of air through the holes, and in real conditions when winding sleeves σ πό- · 20 with the power of glue, the holes are blocked by the latter.

The direction of the spiral in the direction opposite to the winding does not create an additional driving moment, contributing to the easy removal of manufactured sleeves from the mandrel.

The purpose of the invention is to improve the conditions of convergence of manufactured sleeves with the mandrel. thirty

2

This goal is achieved by the fact that the mandrel has radial partitions that divide it into chambers, some of which have holes in the end of the mandrel that connect lx with the atmosphere, while others are connected with the pneumatic system, with the chambers communicating with the atmosphere alternating with chambers connected to pneumatic system, and the holes located in adjacent chambers are displaced one relative to another at an angle of winding and are interconnected by means of grooves located on the outer surface of the mandrel.

FIG. 1 shows a device for the manufacture of paper sleeves; on {'fig. 2 shows section A-A in FIG. one. , '

The device for making paper sleeves contains a hollow cylindrical mandrel 1, which is divided by longitudinal radial partitions 2 into chambers 3 and 4, and the pneumatic system 5. Chambers 3 have holes 6 in the butt-end of the mandrel 1 connecting them to the atmosphere, and the cavities of chambers 4 are connected to the pneumatic system 5. On the cylindrical surface of the mandrel I there are radial holes 7 located above the chamber, while the holes 7 located in the adjacent ............ 3

chambers 3 and 4, are offset one relative to the other at an angle of winding and are interconnected by means of grooves 8 located on the outer surface of the mandrel 1.

The device works as follows.

Tape 9 comes at an angle of winding about (in a spiral) on the mandrel 1. Her. tucked under the belts 10, which provide the winding of the tape 9 on the mandrel 1. Air comes out of the pneumatic system! into the chambers 4 and from there through the Perforation 7 flows through the grooves 8 into the adjacent chambers 3. In the grooves 8, an airbag is formed, which creates a gap between the surface of the mandrel of the 1st winding sleeve. ;

Air; the cushion serves to reduce friction between the surfaces of the mandrel 1 and the guillea, and the flow of air along the grooves 8 gives additional direction to the winding tape 9 along the winding and at the same time provides a smoother and easier removal of the liner. '

759342 - ‘4

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Claims (1)

Claim A device for making paper sleeves from helically wound ribbons, comprising a hollow cylindrical mandrel having radial “openings located along a spiral line and a pneumatic system, which is designed so that, in order to improve the conditions of convergence of the manufactured gil from the mandrel, the latter has radial Partitions separating its“ chamber ”, some of which have openings in the end of the mandrel, connecting them with the atmosphere, while others are connected with a pneumatic system, when cameras connect with the atmosphere, they alternate with cameras connected to the pneumatic system, and the holes located in adjacent chambers are offset from each other at an angle 20 windings and connected to each other through grooves located on the outer surface of the mandrel.