CA2227113C

CA2227113C - Water jet turn-up apparatus for use in a web winder

Info

Publication number: CA2227113C
Application number: CA 2227113
Authority: CA
Inventors: Roman C. Caspar
Original assignee: Individual
Current assignee: Paprima Industries Inc
Priority date: 1998-01-15
Filing date: 1998-01-15
Publication date: 2006-03-28
Anticipated expiration: 2018-01-15
Also published as: CA2227113A1

Abstract

A winder for continuously winding a web into roles on successive cores includes a water jet cutting device to effect turn-up of the web onto an empty core. The water jet cutting device has at least one nozzle positioned on the same side as the web as the empty core and upstream of the nip where the empty core meets the driving drum. The water jet nozzle directs a water jet toward the web as the web enters the nip to cut a leading tip which turns up onto the empty core. By directing the water jet against the web on the same side as the empty core the water backsplash at the nip wets the empty core causing the cut tip to turn up onto the empty core. The winder further includes at least one auxiliary nozzle located upstream of the nip on the same side of the web as the empty core for directing a low atomized adhesive fluid stream against the empty core thereby gluing a predetermined strip of the empty core that passes over the leading tip severed from the web causing the leading tip to adhere to the empty core and effect turn-up. Provision is made for the use of two water jet nozzles moving independently of each other to provide a cross cut across the web. When two water jet nozzles are used in this manner, the one auxiliary nozzle providing the low atomized fluid stream is positioned at the lateral center of the empty core to direct the glue onto a center portion of the empty core to assist in turn up.

Description

WATER JET TURN-UP APPARATUS
FOR USE IN A WEB WINDER
Field of the Invention The present invention relates to a winder for continuously winding a web onto a core and in particular relates to the use of a water jet cutting device that cuts a leading tip in a web prior to turn-up of the web onto a s new empty core.
Background of the Invention In present day winding machines for winding a web into a roll it is common practice to drive the web onto the new roll by using a reel driving drum in contact with the web and roll. These machines are ~ o typically equipped with a transfer arm mechanism for lowering into loading engagement an empty core or reel bar. The empty core can either be partially or fully accelerated up to a surface speed equivalent to the speed of movement of the web over the driving reel drum. When the empty core comes into driving relation with the driving reel drum, the ~, s web is cut and turns up onto the empty core. The existing roll is decelerated and removed from the winding machine. The empty core is typically then rotated around the driving reel drum by the transfer arm mechanism into its normal winding position. In order to provide an automatic turn-up of the web onto the empty core, knife cutting devices were used in the past. One such knife cutting device is disclosed in U.S.
patent 4,444,362 issued April 24, 1984 to Gerald W. Karr.
a More recently, the industry has started to recognize the application of water jet technology to effect cutting of the web in the turn-up operation. A water jet cutting device used in turn-up is disclosed in U.S.
patent 5,014,924 issued May 14, 1991 to Heinz K. Noswisch et al. In this patent multiple water jet cutting devices are utilized to effect both the ~ o cutting oil the web and the adhesion of the web to the new core. The multiple water jets are positioned downstream of the nip formed between the driving reel drum and the empty core. The multiple water jets have their nozzles directed at the empty core so as to directly wet the empty core at the time the water jet cuts leading edges in the web. As a result, ~ s the leading edges adhere to the empty core.
Another patent teaching the use of one for more water jet nozzles to cut a leading tip in the web and a resultant tail is U.S. patent 5,360,179 issued November l, 1994 to Kalevi A. Vesterinen. This patent teaches cutting the web in an open draw upstream of the driving reel drum and the ao nip defined between the driving reel drum and the empty core. This patent does not take advantage of the adhesion characteristics associated with wetting the core to assist in the turn-up of the web onto the empty core. By wetting the web in an open drum upstream of the reel drive drum, the wet web first contacts the driving reel drum and consequently .~.s the adhesion characteristic of the wet web is more likely to cause the leading tip to follow the driving reel drum. This patent teaches the use of an air nozzle located downstream of the nip to blow the tip off of the driving reel drum and onto the empty core to effect turn-up. One problem with this turn-up device is that it is difficult to cut the web in an open draw not supporting the underside of the web. Further the air blower is required to effect turn-up.
s There is for a need for a turn-up device in a winding machine that uses the adhesion characteristics of wet paper and does not incumber transfer of a new wound core to its normal winding position.
Summary of The Invention The present invention is directed to a winder for continuously ~o winding a web into rolls on successive cores comprising a reel driving drum over which the web travels for driving the successive cores and to wind the web onto the empty core. The winder includes roll changing apparatus for cutting and transferring the web from a full roll to an empty core. In particular, the present invention provides a water jet cutting i s device having at least one nozzle positioned on the same side of the web as the empty core and upstream of the nip. The water jet nozzle directs a water j et toward the web as the web enters the nip to cut a leading tip which turns up onto the empty core. By directing the water jet against the web on the same side as the empty core, the water backsplash at the nip :~o also wets the empty core causing the cut tip to turn up onto the empty core. By directing the water j et at the nip, the web is supported on the reel drive drum immediately prior to the nip. Further advantage is found with the present invention by locating the water jet cutting device immediately upstream of the nip formed between the empty core and a zs driving reel drum because the water jet cutting device is located in a position that does not restrict the movement or rotation of the empty core around the driving reel drum to its normal winding position.

In accordance with one aspect of the present invention there is provided a winder for continuously winding a web into rolls on successive cores comprising a reel driving drum over which the web travels for driving the successive cores and roll changing apparatus for a cutting and transferring the web from a full roll to an empty core. The roll changing apparatus includes a transfer mechanism for transferring the empty core into engagement with the web and the reel driving drum to provide a nip between the driving reel drum and the empty core through which the web passes. The reel driving drum causes the empty i o core to rotate at a speed ready to accept the web. The roll changing apparatus includes a water jet cutting device including at least one nozzle positioned on the same side of the web as the empty core and upstream of the nip for directing a water jet toward the web entering the nip to cut a leading tip into the web and to wet the web prior to the web entering n s the nip. The empty core is wetted by the backsplash of water from the nip and the nozzle is adapted to move lengthwise across the web while directing the water jet towards the nip whereby the water jet severs the web at the leading tip which turns up onto the empty core as the leading tip passes through the nip and continues to cut a tail across the web.
:~o The winder of the present invention further provides for at least one auxiliary nozzle located upstream of the nip on the same side of the web as the empty core for directing a low atomized adhesive fluid stream against the empty core thereby gluing a predetermined strip of the empty core that passes over the leading tip severed from the web causing the ~s leading tip to adhere to the empty core. The use of such a low atomized fluid stream insures proper adherence of the leading tip to the empty core without the need to use an air blowing device such as a nozzle or goose neck.
In accordance with one aspect of the present invention there is provided a winder for continuously winding a web into rolls on successive cores comprising a reel driving drum over which the web travels for driving the successive cores and roll changing apparatus for cutting and transferring the web from a full roll to an empty core. The roll changing apparatus includes a transfer mechanism for transferring the empty core into engagement with the web and the reel driving drum o to provide a nip between the driving reel drum and the empty core through which the web passes. The reel driving drum causes the empty core to rotate at a speed ready to accept the web. The roll changing apparatus includes a water jet cutting device including at least one nozzle positioned on the same side of the web as the empty core and upstream s of the nip for directing a water jet toward the web entering the nip to cut a leading tip into the web and to wet the web prior to the web entering the nip. The roll changing apparatus further includes at least one auxiliary nozzle located upstream of the nip on the same side of the web as the empty core for directing a low atomized adhesive fluid stream .ao against the empty core. This results in gluing a predetermined strip of the empty core that is aligned with the leading tip to cause the leading tip to adhere to the empty core.
In the event two water jet nozzles are used which move independently of each other to provide a cross cut, it is envisaged that as one auxiliary nozzle providing the low atomized fluid stream may be positioned at the lateral center of the empty core to direct the glue onto a center portion of the empty core.

Brief Description of The Drawing-s For a better understanding of the nature and objects of the present invention reference may be had to the accompanying diagrammatic drawings in which:
s Figure 1 is a perspective view of a winding apparatus for winding a web into a roll including the water jet cutting device of the present invention;
Figure 2 is a plan view showing a tail cutting pattern and the location of the spray of adhesive onto the empty core for a lateral cut;
~ o Figure 3 is an end view of a winding apparatus for winding a web into a roll and shows two water jet cutters used to provide a double cross cut; and, Figure 4 is a plan view showing a tail cutting pattern for the cross cut of Figure 3.
~ s Detailed Description of The Drawings Referring to Figure 1 there is shown a winder 10 for winding a web 12 into rolls 14 in successive cores 16. The winder 10 is preferably part of a winding section in a paper making machine. The web 12 is preferably a paper web or paperboard. The roll 14 is supported by its core ao 16 on rails 18 (one shown) supported by stands 20. As the diameter of the wound web on roll 14 increases, the core 16 moves along rails 18 in the direction of arrow 22. The web 12 is driven by driving reel drum 24 onto the core 16. The driving reel drum 24 is also shown in driving engagement with roll 14 wound about core 16. The driving reel drum 24 .~s is mounted on stands 26 and driven by a motor (not shown). The direction of rotation of driving reel drum 24 is shown by arrow 27 which results in the roll 14 rotating in the direction shown by arrow 28.

The winder 10 is shown with an empty core 30 loaded and supported by transfer arm mechanism 32 onto the driving reel drum 24. It should be understood that for the purposes of illustration, only arm mechanism 32 is shown and that some other apparatus is usually required s to lc>wer the empty core 30 into the position shown. The empty core 30 is typically lowered into position prior to web turn up. The transfer arm mechanism 32 is a part of the changing apparatus for cutting and transferring the web 12 from a full roll, as illustrated by roll 14, to the empty core 30. The transfer arm mechanism 32 is controlled to rotate in a io clockwise direction to place the empty core 30 on the rails 18 after the web 12 has been cut and turned up onto the empty core 30. Prior to lowering the empty core 30 to its normal winding position onto rails 18, the roll 14 is moved away from the driving reel drum 24 along rails 18.
As the empty core is lowered into the initial winding position i s shown in Figure 1, the empty core 30 is accelerated by auxiliary means (not shown) and brought into driving contact with the driving reel drum 32. Once the empty core 30 engages the driving reel drum 24 at nip 34, the cutting of the web 12 to bring about its turn-up onto the empty core 30 is initiated.
a:o The roll changing apparatus for cutting the web 12 includes stationary auxiliary nozzle 36 and water jet cutting device 38 which includes at least one nozzle 40.
Stationary nozzle 36 is located upstream of nip 34 on the same side of the web 12 as the empty core 30. The stationary nozzle 36 directs a as low atomized adhesive fluid stream against an edge portion of the empty core 12. The adhesive fluid is a water based fluid preferably containing amounts of glue or adhesive materials. The nozzle 36 directs the adhesive stre;~m against the edge of the empty core 30 adjacent or overlapping with the initial lead in tip to be cut from the web 12 by a water jet cutting device 38.
Referring to Figure 2, the portion of the empty core 30 where the s adhesive fluid is directed is shown at 42. This is an area of about 6 to 8 inches from the edge of the web 12. The stationary mounting of the auxiliary nozzle 36 is illustrated to be mounted on the beam 48 of the water jet cutting device 38. It should be understood that the auxiliary nozzle 36 may be mounted directly to the floor by a separate supporting i o structure.
The water jet cutting device 38 has a beam 48 supported by arm 50 above the floor (or by other suitable means). The water jet cutting device 38 includes a carriage 52 movable lengthwise along beam 48 across the width of empty core 30 and web 12. The water jet cutting device 38 Is includes a high pressure water jet nozzle 40 that directs a water jet at the top surface of web 12. The nozzle 40 is in position on the same side of the web 12 as the empty core 30 and upstream of the nip 34 so as to direct the water jet against the web 12, supporting surface of the reel driving drum 24 and into nip 34 to cut the web. The water jet is directed towards 2 o the web 12 at a relatively shallow angle to backsplash water from the surface of web 12 onto the surface of the empty core 30. The wetted surface of the empty core 30 causes the cut leading tip 44 (Figure 2) of web 10 to turn-up onto the empty core 30 by adhesion. Further, the adhesive temporary sprayed onto the empty core 30 assists in the turn-up 2s of the tip 44 onto the empty core 30.
Once turn-up has been initiated, the water jet nozzle 40 moves with carriage 52 across the rail or beam 48 as indicated by arrow 53.. This cuts a tail 46 in pattern shown in Figure 2 across the web 12 thereby severing the web 12 from the existing roll 14.
While the preferred embodiment of the present invention utilizes an auxiliary low pressure stationary nozzle 36 to glue a portion of the surface s of the empty core 30 to effect turn-up of the leading tail 44 cut into the web 12, if should be understood that it is contemplated to be within the realm of the present invention to rely on the backsplash created at the nip 34 to wet the empty core 30 and result in the web 12 adhering to the empty core 30 as the cut leading tip is pressed through nip 34.
~ o The lateral cross cut as shown in Figures 1 and 2 is suitable for cuts across a web of slower paper machines running at web speeds of 2,200 to 2,500 feet per minute.
In higher speed machines it may be better to perform a cross cut by two independently movable water jet nozzles 40, 41 as shown in Figure 3 i s providing the cutting pattern 66 of Figure 4. In this embodiment, a central tip 45 is cut into the web. The auxiliary nozzle is located above the center of the empty core 30 to spray adhesive onto the core and assist in tl~rn up of the tip onto the core 30 at 43. The cutting nozzles 40, 41 may already be accelerating across the web 12 with the water jet being a:o turned on near the location of the central tip 45 cutting the web 12 ourivardly from the central tip 45. By using two cutting nozzles 40, 41, the 'time to cut the web is reduced, reducing the number of turns of non-usable web onto the core prior to the web cut being completed.

Claims

1. A winder for continuously winding a web into rolls on successive cores comprising a reel driving drum over which the web travels for driving the successive cores, and roll changing apparatus for cutting and transferring the web from a full roll to an empty core, comprising:
a transfer mechanism for transferring the empty core into engagement with the web and the reel driving drum to provide a nip between the driving reel drum and the empty core through which the web passes, the reel driving drum causing the empty core to rotate at a speed ready to accept the web; and, a water jet cutting device including at least one nozzle positioned on the same side of the web as the empty core and upstream of the nip for directing a water jet toward the web entering the nip to cut a leading tip into the web and to wet the web prior to the web entering the nip, the empty core being wetted by the backsplash of water from the nip, and the nozzle being adapted to move lengthwise across the web while directing the water jet towards the nip whereby the water jet severs the web at the leading tip which turns up onto the empty core as the leading tip passes through the nip and continues to cut a tail across the web.

2. The winder of claim 1 further including at least one auxiliary nozzle located upstream of the nip on the same side of the web as the empty core for directing a low atomized adhesive fluid stream against the empty core thereby gluing a predetermined strip of the empty core that passes over the leading tip severed from the web causing the leading tip to adhere to the empty core.

3. The winder of claim 1 wherein the nozzle is directed against the web immediately upstream of the nip.

4. The winder of claim 2 wherein the water jet includes one nozzle and the leading tail is cut in from a tip of the web which nozzle continues to cut across the web in one lateral direction to cut the tail.

5. A winder for continuously winding a web into rolls on successive cores comprising a reel driving drum over which the web travels for driving the successive cores and roll changing apparatus for cutting and transferring the web from a full roll to an empty core, comprising:
a transfer mechanism for transferring the empty core into engagement with the web and the reel driving drum to provide a nip between the driving reel drum and the empty core through which the web passes, the reel driving drum causing the empty core to rotate at a speed ready to accept the web;
a water jet cutting device including at least one nozzle positioned on the same side of the web as the empty core and upstream of the nip for directing a water jet toward the web entering the nip to cut a leading tip into the web and to wet the web prior to the web entering the nip; and at least one auxiliary nozzle located upstream of the nip on the same side of the web as the empty core for directing a low atomized adhesive fluid stream against the empty core thereby gluing a predetermined strip of the empty core that is aligned with the leading tip severed to cause the leading tip to adhere to the empty core.

6. The winder of claim 5 wherein the empty core is wetted by the backsplash of water from the nip.

7. The winder of claim 5 wherein the nozzle is adapted to move lengthwise across the web while directing the water jet towards the nip whereby the water jet severs the web at the leading tip which turns up onto the empty core as the leading tip passes through the nip and continues to cut a tail in the web.

8. The winder of claim 5 wherein the nozzle is directed against the web immediately upstream of the nip.

9. The winder of claim 5 wherein the water jet includes one nozzle and the leading tail is cut in forming a tip of the web.

10. The winder of claim 5 wherein the water jet cutting device includes two nozzles adapted to move independently of each other to provide a cross-cut across the web.