| 摘要 |
The invention discloses a device for manufacturing a composite yarn formed by the association of continuous glass filaments with continuous filaments of an organic thermoplastic material comprising at least a yarn feeder, supplied with glass, with on its internal surface a multiplicity of orifices from which are stretched a multiplicity of glass filaments, associated with a coating device, and at least a spinning head supplied with molten organic thermoplastic material, with on its internal surface a multiplicity of orifices from which are stretched a multiplicity of organic filaments. The said head is associated with a stretching device comprising at least two cylinders and a venturi device projecting the organic filaments into the lap formed by the glass filaments, means, common to the yarn feeder and to the spinning head, for assembling and stretching the composite yarn, for instance by a winding device such as a winder equipped with spindles, in which an optical device for sensing the thermoplastic filament lap reeling off in a defined zone is set between the cylinder stretching device and the venturi device, the said optical device being coupled with a circuit controlling the rotational speed of at least one of the cylinders.
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