CA1049243A - Stranding head - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE

A stranding head for stranding individual strand elements or strand elements collected together in bunches including a deflection roller with a running surface having a concave profile, around which each strand element to be stranded is passed, and which is rotatably mounted in a frame which is adapted to rotate about the path of the strand elements through the stranding head, the deflection roller being rotatable about an axis which is inclined with respect to a line perpendicular to the path of the strand elements.

Description

-`~` 1049Z43 The present invention relates to a stranding head for stranding individual strand elements or strand elements collected together in bunches in a twisted or non-twisted manner.
An example of a prior art stranding head is di~closed in DT-OS 2,138,239 which stranding head consists of two guide discs, and three embraced deflection discs, and wherein two of the deflec-tion discs are disposed in pairs one adjacent the other in the with~rawal direction between the guide discs and the third deflec-tion disc is disposed perpendicular to the other two. This stranding head, however, has the disadvantage that it has a relatively large mass, so that at high stranding speeds large centrifugal forces occur, whereby however only a limited stranding speed is possible.
The present invention provides a stranding head for stranding individual strand elements or strand elements collected together in bunches in a twisted or non-twisted manner; including a deflection roller with running surface having a concave profile, around which the strand element(s) to be stranded is/are passed, and which is rotatably mounted in a frame which is adapted to rotate about the path of the strand elements through the stranding head, the deflection roller being rotatable about an axis which is inclined with respect to a line perpendicular to the path of the strand elements.
The invention is explained in more detail with reference to the example illustrated in the accompanying drawing.
The stranding head shown in the drawing consists of a frame 1 which is constructed in a substantially rectangular .:

form and is produced from a profiled steel member. A de-- flection roller 3 on a shaft 2 rotatable in bearings 5 i~
mounted in the frame 1 obliquely to the traversing direction of a str~nd element 4. The deflection roller 3 i8 preferably made of a synthetic resin and has a co~cave profile. ~he frame comprise~ an inlet guide 6 upstream of the deflecticn - roller in the BUpply direction of the strand element, and ; an outlet guide 7 down~tream of the deflection roller in the 8upply direction. The inlet guide 6 and the outlet guide 7 are rotatabl~ mounted i~ bearingP 8.
~ he frame 1 i8 dri~en b~ means of a dri~e apparatus (not illustrated) in the direction of rotation indicated by wPy of examjple by the arrow ~.
~ he oblique positioning of the roller has the effect that the strand elemen* running on or leaving the roller tangentially does not tou¢h it~elf and thus is not damaged by rubbing against itself.
- Owing to the concave profile of the running surface of the deflection roller, the strand element is pre~e~ted from escaping laterally and thus ~umping off the roller. Both reatures, the oblique positioning and the conca~e profile, of the deflection roller effect extremely stable running of the ~trand element embracing the deflection rolier.
It iB furthermore ad~ntageous if, i~ the direction of ~upplying the strand elements ahead of the deflection roller, an inlet guide, and, downstream Or the roller, an outlet guide are formed in the fraD~. In ~articular b~ thi~ arrangement of the stra~d guide~ directly in the frame an a¢curate guidance of the strand elements upstream of and downstream of the roller is ensured. In an advantageous construction of the invention the deflection roller consists of a synthetic resin. In this case it is advantageous if a synthetic resin is selected which is charac-terised by a high abrasion resistance.
As may be seen from theabove, a stranding head having an extremely low mass is provided and permits high rotational speeds and thus high stranding speeds to be obtained. On the other hand, the stranding head is characterised by an extremely simple and non-complicated and thus economically favourable manner of construc-tion.

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Claims (3)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. A stranding head for stranding individual strand elements or strand elements collected together in bunches including a deflection roller with running surface having a concave profile, around which each strand element to be laid is passed, and which is rotatably mounted in a frame which is adapted to rotate about the path of the strand elements through the stranding head, the deflection roller being rotatable about an axis which is inclined with respect to a line perpendicular to the path of the strand elements.

2. A stranding head according to claim 1, wherein an inlet guide is provided on the frame upstream of the deflection roller in the direction in which the strand elements are supplied, and an outlet guide is provided downstream of the deflection roller in the direction in which the strand elements are supplied.

3. A stranding head according to claim 1 or 2 in which the deflection roller is formed of a synthetic resin.