Spinning head and relative apparatus for the production of filaments
AssigneeFARE' S.P.A. a socio unico
InventorRosaldo Fare′
Life of this patent
Estimating the term…
Abstract
A spinning head has a feed channel for feeding material to be extruded, a distribution chamber, and an extrusion surface having extrusion holes. The distribution chamber has a lower surface and an upper surface opposite the lower surface. The distance between the upper surface and the lower surface of the distribution chamber is reduced. The distance reduction may be a substantially continuous reduction or a discontinuous reduction. In the discontinuous reduction example, the upper surface includes portions that are substantially parallel to the lower surface and portions inclined with respect to the lower surface. The substantially parallel and inclined portions are in an alternating arrangement.
Claims16
A spinning head (1) for a plant for making synthetic filaments, comprising:
- a body (7) provided with an extrusion surface (8) having a plurality of extrusion holes (30),
- a distribution chamber (4) n said body,
- a feed channel (5) for feeding material to said distribution chamber,
- distribution channels (3) for feeding material from said distribution chamber to said extrusion holes (30), said distribution chamber (4) comprising a lower surface (2) which faces said extrusion surface (8) and is parallel to said extrusion surface (8), and an upper surface (6) opposite said lower surface (2),
- wherein said distribution chamber (4) includes a distance (H) between the upper surface (6) and the lower surface (2) of the distribution chamber, said distance (H) extending along a direction parallel to said distribution channels (3) and perpendicular to said extrusion surface (8),
- wherein said distance (H) is reduced along a direction extending away from the feed channel (5), so that the area of the distribution chamber is progressively reduced along the direction extending away from the feed channel (5), and
- wherein said distance (H) is reduced in a manner selected from:
- a) a substantially continuous reduction,
- b) a discontinuous reduction in which, in the upper surface (6), a plurality of first portions (6a) substantially parallel to the lower surface (2) alternate with a plurality of second portions (6b) inclined with respect to the lower surface (2).
Dependencies are inferred from the claim text.