Winding – tensioning – or guiding – Helical or random winding of material – Including particular drive
Reexamination Certificate
2000-05-03
2001-09-11
Mansen, Michael R. (Department: 3653)
Winding, tensioning, or guiding
Helical or random winding of material
Including particular drive
C242S474500
Reexamination Certificate
active
06286778
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a spooling machine for continuously running fibers and, more particularly, to a spooling machine for holding a number of bobbins for the continuously running fibers, a changing device including a number of changing units corresponding to the number of fibers and a plurality of variable speed motors for the spindles and the changing units supplied by frequency converters.
2. Prior Art
A spooling machine of the above-described type is disclosed in EP 0 845 432. Drive electronics and control electronics are assembled into a single electronic unit in this known spooling machine. This single electronic unit is mounted on a horizontal support arm, on which the changing device also is arranged. Frequency converters particularly are part of the drive electronics.
The respective frequency converters are connected with the various corresponding drive means by cable. In order to avoid electronic interaction of the supply electronics with the control electronic or on other electric units found in the surroundings, the cable must be carefully shielded. Special problems exist in spooling machines, which are equipped with a spool revolver, carrying ground ring contacts, with which energy is transferred from stationary machine parts to the rotating revolver. Other problems result from the heat losses of the various frequency converters occurring in the comparatively narrow space. Additional features are thus required that guarantee sufficient cooling.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a spooling machine of the above-described type for continuously running fibers that does not have the above-described disadvantages.
This object and others, which will be made more apparent hereinafter, are attained in a spooling machine comprising at least one spindle for fixing or holding respective bobbins for a corresponding number of the continuously running fibers, a changing device including a number of changing units corresponding to the number of continuously running fibers and respective variable speed motors for rotatably driving the at least one spindle and the changing device.
According to the invention each variable speed motor for the at least one spindle and changing device has an integrated frequency converter. The frequency converters for the spindles and changing units are no longer arranged in the electronic unit with the control electronics.
The term “integrated” frequency converter means that the variable speed motor and frequency converter are in one unit, e.g. the frequency converter is mounted like a terminal box on the motor housing.
In a preferred embodiment of the invention the one or more spindles are rotatably mounted on a rotatable spindle revolver.
In another embodiment a contact roll is provided over which the fibers pass to the bobbins. The contact roll is also driven rotatably by means of another variable speed motor with an integrated frequency converter.
REFERENCES:
patent: 3999715 (1976-12-01), Schippers et al.
patent: 4069985 (1978-01-01), Lohest et al.
patent: 4602747 (1986-07-01), Turk et al.
patent: 4917319 (1990-04-01), Lenk
patent: 4963778 (1990-10-01), Jensen et al.
patent: 5029762 (1991-07-01), Behrens et al.
patent: 5526995 (1996-06-01), Westrich et al.
patent: 5927636 (1999-07-01), Rafflenbeul
patent: 0 845 432 A1 (1998-06-01), None
Mansen Michael R.
Neumag - Neumuenstersche Maschinen - und Anlagenbau GmbH
Striker Michael J.
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