Winding – tensioning – or guiding – Convolute winding of material – With particular drive
Patent
1998-07-02
2000-05-02
Jillions, John M.
Winding, tensioning, or guiding
Convolute winding of material
With particular drive
2425424, 242547, B65H 1814
Patent
active
060562307
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a roller for a winding machine, particularly for winding paper or cardboard webs, whose purpose it is to be pressed against the winding rolls during winding and to a winding machine provided with a roller according to the invention.
STATE OF THE ART
In order to produce wound-up rolls from longitudinally subdivided paper or cardboard webs, it is known to use winding machines with one or two driven rollers against which the winding rolls rest or on which they are supported. The rollers are known as support rollers when they bear the full weight of the supported winding roll (DE-A 39 24 612). When the weight is totally or only partially supported by guide heads inserted in the sleeves of the winding roll and held on support arms, then the roller is defined as a backing roller (DE-C 31 02 894, DE-C 40 12 979).
Furthermore winding machines comprise a so-called pressure roller, which at the onset of winding is pressed in opposite direction to the contact line between the winding roll and a support or backing roller, when the contact pressure resulting from the weight of the roll is not yet sufficient to obtain the desired winding firmness and which contributes considerably to the stability of the winding operation (DE-C 37 19 093, EP-C0410093).
The winding firmness which is decisive for the quality of the wound rolls (surface compression between the layers of a wound roll) depends on the line load and the geometric conditions in the nip between the winding roll and the support or backing roller. The term "line load" means the contact pressure scaled to the width of the winding roll and measured in N/m. In the production of wound rolls all efforts are aimed at setting a predetermined, uniform winding firmness at high speeds, without surface damage or winding defects occurring in the wound roll. Winding defects are caused by excessive stretching of the web in the nip. Since the stretching in the nip between the support roller and a winding roll increases with the increasing diameter of the roll, its value limits the maximal final diameter of a wound roll free of winding defects.
In order to produce good-quality wound rolls with a larger diameter, the EP-A-0562266 proposes a winding machine with support rollers whose support roller on the outgoing side, which is not wrapped by the web and is lower with respect to the support lower roller on the incoming side, is provided with shell which is considerably more deformable than the shell of the support roller on the incoming side. According to one embodiment the support roller has an outer layer of rubber, wherein chambers connected to the steel interior of the support body are provided. Due to the strong deformability, the contact pressure on the support roller should be as limited as possible, so that the winding hardness does not increase disproportionally.
OBJECT OF THE INVENTION
It is the object of the invention to create a roller for a winding machine, which when used as a support or backing roller will make possible a winding with a lower winding hardness. When used as a pressure roller, it should be capable to compensate the variations in the uniformity of the winding rolls, e.g. the ones resulting from the web profile variations, and to insure this way the uniformity of the contact pressure.
This object is achieved, in accordance with the invention in a roller for a winding machine for winding paper or cardboard webs into rolls and which comprises a hollow cylindrical support body made of a rigid material and a deformable layer on a peripheral surface of the body. The deformable layer consists of a cellular plastic material with a multitude of uniformly distributed pores and of a compression modulus k of less than 10 MPa.
BRIEF DESCRIPTION OF THE DRAWING
The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing in which:
FIG. 1 is a longitudinal section through a support of the backing roller of the i
REFERENCES:
patent: 2985398 (1961-05-01), Rockstrom
patent: 3240442 (1966-03-01), Kilmartin
patent: 3503567 (1970-03-01), Casey
patent: 3565746 (1971-02-01), Stevens
patent: 3702687 (1972-11-01), Hall
patent: 3972135 (1976-08-01), Pietraszek
patent: 4026487 (1977-05-01), Ales
patent: 4193559 (1980-03-01), Ballard
patent: 5101930 (1992-04-01), Fargo
patent: 5553806 (1996-09-01), Lucas
patent: 5582361 (1996-12-01), Muller et al.
patent: 5758842 (1998-06-01), Dorfel et al.
patent: 5785273 (1998-07-01), Wolf et al.
patent: 5803398 (1998-09-01), May et al.
patent: 5853139 (1998-12-01), Hehner et al.
"Kunststofftabellen fur Typen Eigenschaften Halbzeugabmessungen" published Apr. 1973 by Schiffmannn Tabellen Verlag.
Muller Georg
Peters Hans-Friedrich
Dubno Herbert
Jagenberg Papiertechnik GmbH
Jillions John M.
LandOfFree
Roller for a winding machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Roller for a winding machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Roller for a winding machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1587517