Winding – tensioning – or guiding – Convolute winding of material – With spool loading or coil removal
Reexamination Certificate
1999-02-24
2001-06-26
Mansen, Michael R. (Department: 3653)
Winding, tensioning, or guiding
Convolute winding of material
With spool loading or coil removal
C242S541600, C242S542300
Reexamination Certificate
active
06250580
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to a process for the continuous winding of a web of material, e.g., a paper or cardboard web, onto a reel spool to form a reel (or wound roll) and a winding machine for the continuous winding of a web of material, e.g., a paper or cardboard web, onto a reel spool to form a reel.
2. Discussion of Background Information
Processes and winding machines of the type discussed here are used in conjunction with a machine for the production or processing of a web of material, e.g., a paper or cardboard web. German Application No. DE 197 35 590.0 discloses a process and a winding machine, in which the web of material is guided over a peripheral zone of a reel drum, which forms a winding nip (or gap) with a reel. In the wind-up phase, the increasing diameter of the reel (or wound roll) is compensated for by a relative movement of the reel with respect to the reel drum, and the linear force in the winding nip is controlled by displacement of the reel drum. In preparation for a reel spool change, a new reel spool for winding a new reel is introduced into a primary zone above the reel drum, where a winding nip is formed between the new drum and the reel drum by a relative movement between the reel drum and the new reel spool. The web of material is cut and its free end is wound onto the new reel spool. The new reel spool is transferred with the newly created reel over a peripheral zone of the reel drum into a lower secondary zone. During winding in the primary zone and during the transfer, compensation for the increasing reel diameter and control of the linear force in the winding nip is effected by displacement of the reel drum. During the remainder of the winding process, i.e., when the reel is positioned in the second zone, growth of the diameter of the reel is compensated for by a relative movement of the reel with respect to the reel drum along a guide path, and the linear force in the winding nip is controlled by displacement of the reel drum. It has been demonstrated that adjustment of the linear force during winding in the primary zone is not possible with adequate sensitivity in all cases, which has a disadvantageous effect on winding quality.
Further, German Application No. DE 35 39 980 discloses a winding machine in which the winder reel spool is permanently stationarily mounted. This stationary mounting of the winder reel spool results in the disadvantage that the linear force in the winding nip between the winder reel spool and the reel located in the secondary zone cannot be controlled or regulated with adequate sensitivity, i.e., due to the very high weight of the reel to be moved under certain circumstances. It is noted that there is often a requirement to produce reels having extremely large diameters, e.g., on the order of 3 to 4 meters.
SUMMARY OF THE INVENTION
The present invention provides a process and a winding machine which does not suffer from the disadvantages of the above-noted winding machines.
Accordingly, the present invention provides a process that, during a continuous winding process, guides the web of material over a peripheral zone of a reel drum through a winding nip formed between a reel drum and a reel, so that the web is wound onto the reel. During this winding phase, i.e., in a secondary zone, the reel drum is pressed against the reel, such that control or regulation of the linear force in the winding nip occurs through displacement of the reel drum. Upon the reel reaching or attaining a desired diameter, and in preparation for a reel spool change, the reel drum is displaced or moved into a fixed position, so that the position of the reel drum is temporarily fixed. This movement may be effected so that, e.g., contact with the reel is maintained while also maintaining the desired linear force. A new and still empty reel spool is introduced into a primary zone, and a new winding nip is formed between the new reel and the reel drum by relative movement of the new reel spool and the reel drum in its fixed position. The web of material is cut, and winding of the web of material into a new reel on the new reel spool begins. The separated or completed reel is removed from the secondary zone and the new reel spool, and the new reel thereon, is transferred from the primary zone into the secondary zone. During winding in the primary zone, during the transfer process, and during a variable period of time after reaching the secondary zone, the linear force in the winding nip is controlled or regulated by relative movement of the reel with respect to the reel drum held in its stationary position. By this displacement of the reel for adjustment of the linear force to a specified, preferably variable, value, increasing diameter is automatically compensated for. The stationary position of the reel drum is then released or canceled such that the reel drum can be displaced, preferably horizontally or substantially horizontally, for controlling or regulating the linear force in the winding nip. During this winding phase, increasing reel diameter is compensated for, preferably by relative movement of the reel relative to the reel drum. The above-described process is repeated with each reel spool change.
The weight of the reel drum is greater than the weight of an empty reel spool and also greater than the weight of a reel having only a few layers of winding. Thus, the weight to be moved for the control or regulation of the linear force in the winding nip at the beginning of the winding process is relatively low as compared to the weight of the reel drum. In this manner, during the initial winding process, a particularly sensitive adjustment of the linear force is possible. This, in turn, enables optimal core winding and, therefore, a defined buildup of the reel, which improves the winding result. Thus, only after the reel has been transferred into the secondary zone, does a change in the control movement to adjust the linear force occur. For this, as already described, the stationary positioning of the reel drum is released so that it may be displaced for adjustment of the linear force, while compensation for increasing reel diameter is preferably provided by relative movement of the reel with respect to the reel drum. The release of the reel drum from the stationary positioning is effected because, with the production of very large reel diameters, the customary maximum thrust distance of the displacement of the reel drum is, as a rule, inadequate for a stationary positioning of the reel.
With the process according to the present invention, a good winding result, i.e., a reel with a defined, uniform reel hardness, may be obtained. This result is attained because an extremely fine regulation of the linear force in the winding nip between the reel drum and the reel is possible during the beginning of the winding process and during the transfer of the reel spool into the secondary zone.
The present invention also provides a winding machine that includes a reel drum, which can be displaced, preferably substantially horizontally, via a pressure device. A web of material, e.g., a paper or cardboard web, is guided over a peripheral zone of the reel drum and onto a reel spool to be wound into a reel (wound roll). The reel spool and the reel drum form a winding nip, through which the web of material is guided. The winding machine also has a primary mount containing a new reel spool, and a secondary mount for the reel spool and reel. The primary mount displaces the new reel spool along a first guide path that is radial to the reel drum. The reel drum, when the new reel spool is the primary mount, may be temporarily fixed in a fixed position, and, when the new reel spool is transferred into the secondary mount, may be displaced, preferably horizontally or substantially horizontally, via the pressure device.
Based upon this design of the winding machine, with which the above-described process may be realized, the linear force in the winding nip may be particularly sensitively adjusted during wind
Madrzak Zygmunt
Moller Roland
Greenblum & Berstein P.L.C.
Mansen Michael R.
Voith Sulzer Papiertechnik Patent GmbH
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