Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1996-10-01
1998-02-10
Stryjewski, William
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 18PW, 2421251, B65H 5400
Patent
active
057160171
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method in connection with a continuously operating spooler, in which method the thread to be spooled is guided onto an empty reel after a first reel has become full by means of a moving finger located in the spooler and a gripping means rotating with the empty reel by moving the thread to be spooled, using the moving finger, into the path of the gripping means, the movement of the thread carried out by means of the finger being synchronized with the movement of the gripping means in such a manner that the finger manages to move the thread into the path of the gripping means before the gripping means reaches the meeting point of the gripping means and the thread.
BACKGROUND
Methods and arrangements of this type are currently widely known in different industrial fields. Electric cable industry can be mentioned as an example of industrial fields in which solutions of this type are used.
The basic principle of the previously known solutions has been that after a reel has become full, the thread to be spooled is moved onto the path of the gripping means rotating with an empty reel by a continuous movement of the finger. The disadvantage of this known principle is that the gripping means may collide with the thread before the thread has reached the middle line of the gap of the gripping means, i.e. the path of the gripping means, as pulled by the finger. If the gripping means collides with the thread in the above-mentioned way, the probable result is a breaking of the thread and an unsuccessful change of the spooling side. The breaking of the thread to be spooled thus causes interruptions of production and thus decreases productivity. It should be noted in this connection that the present-day spooling speeds can be very high, wherefore the amount of damaged material created in connection with a breaking of the thread may be extremely great in some cases.
Examples of publications in which the prior art is described, and solutions disclosed are Finnish Published Specification 46,611 (corresponding to U.S. Pat. No. 3,761,030), British Patent 876,841 and U.S. Pat. Nos. 2,546,636, 3,695,528 and 3,814,340.
SUMMARY OF THE INVENTION
The object of this invention is to provide a method and arrangement by means of which the disadvantages of the prior art can be obviated. The method of the invention is characterized in that the synchronized movement of the finger is carried out in two stages in such a manner that the finger is moved into a waiting position, in which the path of the thread is tangential with the path of the gripping means, and a moment depending on the speed of rotation and position of the gripping means is determined for initiating the continuation movement of the finger. As for the arrangement of the invention, it is characterized in that the synchronized movement of the finger is arranged to be carried out in two stages in such a manner that the finger is moved into a waiting position, in which the path of the thread is tangential with the path of the gripping means and in which the finger is arranged to remain until the moment for initiating the continuation movement of the finger, this moment depending on when the speed of rotation and position of the gripping means has been determined.
The principal advantage of the invention is that the breaking of the thread resulting from an uncontrollable collision between the gripping means and the thread can be eliminated effectively. This will result in improving productivity and reducing material loss in comparison with the prior art. A further advantage of the invention is its simplicity, the implementation of the invention being thus advantageous especially when the advantage in productivity achieved with the invention is taken into account.
In the following, the invention will be described in more detail by means of a preferred embodiment shown in the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows the arrangement of the invention as a schematic top view,
FIG. 2 shows schemati
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Kemppi Kyosti
Leskinen Risto
Nokia-Maillefer Oy
Stryjewski William
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