Apparatus for making two component fibers or continuous filaments using flexible tube inserts

• US 6,168,409 B1
• Filed: 11/13/1998
• Issued: 01/02/2001
• Est. Priority Date: 11/13/1998
• Status: Expired due to Fees

• Current Assignee: Rosaldo Fare
• Original Assignee: Rosaldo Fare
• Inventors: Fare, Rosaldo
• Primary Examiner(s): Pyon, Harold
• Assistant Examiner(s): Del Sole, Joseph S
• Application Number:
  US09/191,663
• Time in Patent Office: 781 Days
• Field of Search: 425/131.5, 425/382.2, 425/463, 425/192.S, 425/133.1, 264/172.15
• US Class Current: 425/131.5
• CPC Class Codes: B29C 48/05 Filamentary, e.g. strands
• CPC Class Codes: B29C 48/10 flexible, e.g. blown foils
• CPC Class Codes: B29C 48/304 specially adapted for bringing together components, e.g. melts within the die
• CPC Class Codes: B29C 48/345 Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
• CPC Class Codes: B29L 2009/00 Layered products
• CPC Class Codes: B29L 2031/731 Filamentary material, i.e. comprised of a single element, e.g. filaments, strands, threads, fibres cables B29L2031/707
• CPC Class Codes: D01D 5/34 Core-skin structure; Spinnerette packs therefor

Abstract

Apparatus for making two component fibers or continuous filaments which includes a pre-die plate having first openings through which a component flows to aligned second openings in a die juxtaposed the pre-die plate, and a flexible tube member extending from the first openings into the second openings to accommodate any misalignment of the first openings relative to the second openings without adversely affecting the flow of the two fiber components.

Claims

1. Apparatus for making fibers or continuous filaments consisting of a first (A) and a second (B) components, said apparatus including:

(a) a first plate (12) having an inlet (18) for receiving said first fiber component (A), and having a first plurality of openings (26) through which said first fiber component (A) flows to an outlet end (28) in said openings (26);

(b) a second plate (10), juxtaposed with said plate (12) and having a second plurality of openings (36) therein, which are generally axially aligned with said first plurality of openings (26) in said first plate (12), and said second plate (10) having a flow channel permitting said second fiber component (B) to flow to said second openings (36) and out through an outlet end of said second openings; and

(c) a plurality of flexible hollow tube members (38) being mounted to extend axially into said second plurality of openings (36), such flexible hollow tube members (38) having one end being located adjacent said outlet end (28) of one of said first plurality of openings (26), with the other end of each said flexible tube member (38) being located adjacent the outlet end of said second openings (36), said flexible tube members (38) having a cross-sectional area less than the cross-sectional area of said second openings (36) and being sufficiently flexible to accommodate any misalignment of said first openings (26) relative to said second openings (36) without adversely affecting the flow of said first and second fiber components, and said flexible tube members (38) including structural elements extending between said flexible tube members (38) and the interior wall of said second openings (36) to center said other end of said flexible tube members (38) in such second openings (36).

2. Apparatus for making fibers as defined in claim 1, wherein said structural elements comprise centering vanes (42) located at said other end of said flexible tube members (38) which extend outwardly and into engagement with the wall of said second openings (36), said vanes being dimensioned to center said other end of said flexible tube member (38) in said second opening (36).

3. Apparatus for making fibers as defined in claim 2, wherein said vanes (42) are dimensioned to maintain said other end of each said flexible tube member (38) axially aligned with said second openings (36) even if said one end of said flexible tube member is not axially aligned with said second openings.

4. Apparatus for making fibers as defined in claim 1, wherein said flexible tube members (38) are mounted in said first openings (26) of said first plate (12) at said outlet end (28) thereof.

5. Apparatus for making fibers as defined in claim 1, wherein said second plate (10) includes die openings (16) adjacent said outlet end of said second openings (36) and in fluid communication therewith so that said second component (B) flows from said second openings (36) into said die openings (16), and wherein said other end of each said flexible tube member (38) has a discharge opening (44) directing the flow of said first fiber component into said die opening (16) within the flow of said second fiber component (B).

6. Apparatus for making fibers or continuous filaments consisting of a first (A) and a second (B) components, said apparatus including:

(a) a first upper plate (12) having an inlet (18) for receiving said first fiber component (A), and having a first plurality of openings (26) through which said first fiber component (A) flows to an outlet end (28) in said openings (26);

(b) a second lower plate (10) juxtaposed with said first upper plate (12) and having a second plurality of openings (36) therein, said second plurality of openings (36) being generally axially aligned with said first plurality of openings (26) in said first plate (12), said second plate (10) having a plurality of die openings (16) disposed in the bottom face of said second lower plate and being in fluid communication with said second openings (36), and said second plate (10) having a flow channel (40) permitting said second fiber component (B) to flow to said second openings (36) and out through an outlet end of said second openings (36) to said die openings (16); and

(c) a plurality of flexible hollow tube members (38) mounted at one end thereof in the outlet end (28) of each said first openings (26) and extending axially into said second plurality of openings (36) with the other end of each said flexible tube members (38) being located adjacent the outlet end said second openings (36), said flexible tube members (38) having a cross-sectional area less than the cross-sectional area of said second openings (36) and each said flexible tube members having centering vanes (42) located at said other end thereof which extend outwardly and into engagement with the walls of said second openings (36), said vanes being dimensioned to center said other end of said flexible tube members (38) in said second openings (36) and to maintain said other end of each said flexible tube members (38) axially aligned with said second openings (36) even if said one end of said flexible tube member (38) is not axially aligned with said second openings (36), and with each said flexible tube member (38) having a discharge opening (44) directing the flow of said first fiber component (A) into said die opening (16) within the flow of said second fiber component (B), and said flexible members (38) being sufficiently flexible to accommodate any misalignment of said first openings (26) relative to said second openings (36) without adversely affecting the flow of said first and second fiber components through said upper (12) and lower (10) plates.