Winding – tensioning – or guiding – Convolute winding of material – With particular drive
Reexamination Certificate
2002-09-06
2004-04-13
Jillions, John M. (Department: 3654)
Winding, tensioning, or guiding
Convolute winding of material
With particular drive
C242S542300
Reexamination Certificate
active
06719237
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a process for the continuous winding of a material web, in particular a paper or cardboard web, onto a reel spool forming a wound reel.
The invention also relates to a winding machine for the continuous winding of a material web, in particular a paper or cardboard web, onto a reel spool forming a wound reel.
2. Discussion of Background Information
Processes and winding machines of this kind are disclosed, e.g., by printed publications WO 98/52858 A1, EP 0 788 991 B1, EP 0 561 128 A1 and EP 0 714 373 B1 .
For instance, with the process known from printed publication WO 98/52858, after the opening of the winding nip formed with the full wound reel, a squeezing element, such as, e.g., a squeeze roll or a pressing roll, has to be pressed against the wound reel to thus avoid the development of air inclusions between the individual layers of tie almost fully wound reel. Furthermore, the “wound up” web tension must be maintained, in order to thus guarantee the desired winding quality even in the outer area of the wound reel. The problem that thereby arises increases the faster the winding machine is operated (magnitude 1,500-2,500 m/min) and the larger the diameters produced in the finished reel spools (magnitude 2.5-4 m).
SUMMARY OF THE INVENTION
The present invention provides an improved process and an improved winding machine of the types mentioned at the outset, with which the above-noted disadvantage is eliminated.
According to the invention, the process mentioned at the outset for winding a material web, e.g., a paper or cardboard web, on a reel spool forming a wound reel includes closing the new winding nip between the reeling drum and the new reel spool brought into a standby position, the reeling drum and the old wound reel are jointly displaced while maintaining the old winding nip formed between the reeling drum and the old wound reel, and that, after the closing of the new winding nip between the reeling drum and the new reel spool, the linear load in the new winding nip is adjusted, controlled or regulated by a corresponding displacement and tightening of the reeling drum.
On the basis of this embodiment, two winding nips can be temporarily formed at the same time in the phase of a turn-up and web change while maintaining preferably adjusted, controlled or regulated linear loads to achieve good winding qualities on the old winding reel and on the new reel spool, through which a change is rendered possible without a squeezing element. The following advantages, among others, of the process described, e.g., in the printed publication WO 98/52858 A1, are thereby maintained:
No linear load transfer due to the linear load generation through the reeling drum;
Smaller linear loads can be realized; and
A simple attachment of center drives to primary and secondary carriages is possible due to the path control.
Even with more sensitive papers, broke no longer occurs on the outer layers. Compared with the so-called Pope reel, at least essentially the same advantages result compared with die process known from printed publication WO 98/52858 A1.
In order to maintain a good winding quality up to the last layer on the old wound reel, it is provided according to the invention that during the joint displacement of the reeling drum and the old wound reel, the linear load in the old winding nip is adjusted controlled or regulated by a corresponding displacement and tightening of the old wound reel.
For the purpose of the displacement of the reeling drum and the old wound reel while maintaining the old winding nip formed, it is provided for the reeling drum to be acted on by a force that is greater than a force acting on the old wound reel.
Alternatively, it is provided for the old wound reel to be acted on by a pressure system generating the linear load, which pressure system features at least two pressure units, preferably independent of one another. In this manner, each of these pressure units can be acted on by a respective force to generate the linear load. The old wound reel will thereby be acted on by a force generating the linear load, which force is smaller than a force acting on the reeling drum, and/or the old wound reel is acted on by a force generating the linear load, which force is smaller than a force acting on the reeling drum. In both cases, the joint displacement of the reeling drum and the old wound reel is brought about while maintaining the old winding nip formed.
The increase in diameter of the old wound reel during the joint displacement of the reeling drum and the old wound reel while maintaining the old winding nip formed is compensated for by a corresponding displacement of at least one pressure unit, whereby technological and economical advantages are obtained with this type of compensation.
In order that the linear load in the winding nip between the reeling drum and the old wound reel can be adjusted, controlled or regulated precisely and quickly during the so-called main winding phase, the old wound reel, supported by a displaceable movement unit, acted on by the second pressure unit in the displaceable secondary transport device acted on by the first pressure unit, is acted on by a force such that it is supported in the secondary transport device in a stationary manner. It is thereby preferably pressed against a stationary stop by the acting force, which stop can be preferably a mechanical stop mounted on the secondary installation or an end stop of a cylinder.
In order to avoid possible damage to the material web and to the winding machine, the force acting on the reeling drum is restricted to a maximum, adjustable limit value.
During the closing of the new winding nip between the reeling drum and the new reel spool, the force acting on the reeling drum reaches the maximum, adjustable limit value, and subsequently the force (K
TT
) is divided vectorially to generate a linear load (LK
PrimNip
) in the new winding nip(
22
′).
From practical viewpoints it is advantageous if the forces are generated hydraulically and/or pneumatically and adjusted, controlled or regulated by at least one pressure control on the reeling drum and/or on the secondary transport device, preferably using Servo-p-Q proportional valves. The forces are preferably generated by at least one linear load control, which preferably features at least one load cell. Alternatively or additionally, the forces can also be adjusted, controlled or regulated by the use of pressure proportional valves. The forces can also be generated by mechanical, hydraulic, pneumatic or electrical components.
The increase in diameter of the old wound reel displaceable by the secondary transport device is preferably compensated by a corresponding displacement of the old wound reel.
According to a preferred practical embodiment of the process according to the invention, for the control or regulation of the linear load in the old winding nip during the main winding phase by a corresponding displacement and adjustment of the old wound reel during the joint displacement of the reeling drum and the old wound reel, regarding the old wound reel, a power control is provided with a lift of approx. 50 to approx. 400 mm, preferably approx. 80 to approx. 120 mm.
The new reel spool can be displaced, preferably swiveled, in particular from a higher position to a lower position, by the primary transport device;
A preferred practical embodiment of the process according to the invention is distinguished by the fact that the primary transport device comprises mandrels and the new reel spool is displaced or swiveled by these mandrels, which rules out the possibility of an interlacing with the old wound reel.
A preferred exemplary embodiment of the process according to the invention is also distinguished by the fact that the secondary transport device comprises mandrels, and the old wound reel is displaced by the mandrels.
The old wound reel is preferably displaced by the secondary transport device at least essentially in a horizontal manner.
Expedientl
Thomas Roland
Wohlfahrt Matthias
Greenblum & Bernstein P.L.C.
Jillions John M.
Voith Paper Patent GmbH
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