Spinneret assembly

Claim 2

Apparatus for producing sheath-and-core-type composite fibres including a first plate member 14 having a plurality of holes 15 therethrough through which a plurality of sheath-and-core-type composite fibres are to be produced and a second plate member 9 which is spaced from the first plate member 14 so as to define a cavity 13 therebetween, the second plate member 19 having a plurality of first and second passages 11, 11 therethrough for passage into the cavity 13 of the material to form the core and the sheath, respectively, of the composite fibres, the exit of each first passage 11 being substantially aligned with the entrance in the cavity 13 of a respective one of the holes 15 in the first plate member 14 and being surrounded by a plurality of the exits of respective second passages 11'.

Claim 3

Apparatus according to Claim 1, wherein the positions of the second passages 11' in the second plate member 9 form a rectangular lattice and each first passage 11 is positioned substantially at the centre of a respective one of the rectangles of the lattice.

Claim 4

Apparatus according to Claim 1 or Claim 2, wherein the second plate member 9 has formed on that surface 16 thereof which has the entrances of the first and second passages 11, 11', a plurality of first and second grooves 10, 10' for holding the material to form the core and the sheath, respectively, each first and second groove 10, 10' communicating with a plurality of the first passages 11 and the second passages 11' respectively.

Claim 5

Apparatus according to Claim 3, wherein the first and second grooves 10, 10' are parallel and are arranged in alternation across the said surface 16 of the second plate member 9.

Claim 6

Apparatus according to Claim 3 or Claim 4 further comprising a third plate member 7 which is spaced from the second plate member 9 to define a second cavity therebetween, the third plate member 7 having a plurality of first and second apertures 8, 8' therethrough for passing, from a respective reservoir 3, 3' thereof, the core and sheath material, respectively, to the first and second grooves 10, 10', respectively.

Claim 7

Apparatus according to Claim 5, wherein the first and second apertures 8, 8' are situated on respective sides of the third plate member 7.

Claim 8

Apparatus according to Claim 5 or Claim 6, wherein the first and second apertures 8, 8' are arranged in a number of respective first and second rows, each first row being aligned with a respective one of the first grooves 10 and each second row being aligned with a respective one of the second grooves 10'.

Claim 9

Apparatus according to any foregoing claim further comprising a spacer member 12 which is disposed between the first and second plate members 14, 9 to define the cavity 13 therebetween.

Claim 10

Apparatus according to Claim 8 further comprising a housing 1, 20 which holds the said plate members 7,9,14, the housing 1, 20 being adjustable so as to permit spacer members 12 of different thicknesses to be disposed between the first and second plate members 14, 9 thereby to vary the size of the cavity 13 therebetween.

Claim 11

A spinneret assembly for composite fibers of sheath-and-core type which comprises; a cap 1 wherein spinning liquid reservoirs 3, 3', for receiving a spinning liquid for a core component and a spinning liquid for a sheath component are respectively provided in front and rear (or on the left and right sides) of a partition wall 4; a filter 6 for filtering the spinning liquids at the exit of said reservoirs; a first distribution plate 7 having introducing holes 8, 8' for alternately distributing the spinning liquids passed through the filter 6 into distribution grooves 10, 10' described later, which plate also functions as a filter-supporting body; a second distribution plate 9 having on the back surface 16 thereof, straight distribution grooves 10, 10' prepared by cutting the surface in parallel and at equal intervals in the front and rear (or left and right) directions, and also having on a flat surface as the front surface 17 thereof, pressure control holes 11, 11' perforated in the plate, for leading the spinning liquids distributed by the distribution grooves to a spinneret plate 14 described later; a spinneret plate 14 having a flat surface 18 as the back surface thereof through which spinning holes are perforated so that the respective axes of the spinning holes can be common to those of the core component pressure control holes in the second distribution plate; and a spacer 12 for forming a narrow and uniform clearance between the second distribution plate 9 and the spinneret plate 14; the respective sheath component pressure control holes 11' perforated through the front surface 17 of the second distribution plate being arranged so as to occupy the point of intersection of a square or rectangular lattice formed by the respective adjacent four of the holes, and the respective core component pressure control holes 11 being arranged so as to occupy the point of intersection of two diagonals of said square or rectangular lattice.

Claim 12

A spinneret assembly for composite fibers of sheath-and-core type which comprises; a cap 1 wherein spinning liquid reservoirs 3, 3', for receiving a spinning liquid for a core component and a spinning liquid for a sheath component are respectively provided in front and rear (or on the left and right sides) of a partition wall 4; a filter 6 for filtering the spinning liquids at the exit of said reservoirs; a first distribution plate 7 having introducing holes 8, 8' for alternately distributing the spinning liquids passed through the filter 6 into distribution grooves 10, 10' described later, which plate also functions as a filter-supporting body; a second distribution plate 9 having on the back surface 16 thereof, straight distribution grooves 10, 10' prepared by cutting the surface in parallel and at equal intervals in the front and rear (or left and right) directions, and also having on a flat surface as the front surface 17 thereof, pressure control holes 11, 11' perforated in the plate, for leading the spinning liquids distributed by the distribution grooves to a spinneret plate 14 described later; a spinneret plate 14 having a flat surface 18 as the back surface thereof through which spinning holes are perforated so that the respective axes of the spinning holes can be common to those of the core component pressure control holes in the second distribution plate; and a spacer 12 for forming a narrow and uniform clearance between the second distribution plate 9 and the spinneret plate 14; the respective sheath component pressure control holes 11' perforated through the front surface 17 of the second distribution plate being arranged so as to occupy the point of intersection of a square or rectangular lattice formed by the respective adjacent four of the holes, and the respective core component pressure control holes 11 being arranged so as to occupy the point of intersection of two diagonals of said square or rectangular lattice.