Yarn texturing nozzle

A yarn texturizing nozzle is disclosed which has two confronting sections that are separable along a separating plane projecting through and longitudinally of a yarn duct that extends through the nozzle and that is supplied with a pressurized fluid such as hot air. A piston within a cavity of one of the nozzle sections is biased by the pressure of fluid within such cavity into abutting engagement with the confronting surface of the other of the nozzle sections. The piston is so designed as to deform, under the force of such engagement, sufficiently as to conform to any unevenness of the confronting surface of the other nozzle section, and so as to minimize fluid leakage at the interface of the nozzle sections.

We claim:

1. In a nozzle for texturng an advancing yarn with pressurized fluid such as hot air, said nozzle comprising a duct through which the yarn is adapted to advance at high speed, and passageway means for conducting a heated pressurized fluid into said duct during operation of said nozzle, said nozzle further comprising two confronting sections separable along a separating plane extending through and generally longitudinal of said duct, said sections being in abutting relationship with each other during operation of said nozzle while being separable from each other to facilitate insertion of yarn into said duct, the improvement comprising:

one of said nozzle sections having a cavity confronting and opening in the direction of the other of said nozzle sections, with said cavity extending over a substantial portion of the length and width of the other of the nozzle sections, and means for introducing pressurized fluid into said cavity,

and piston means mounted in said cavity for movement, in response to the pressure of fluid within said cavity, into abutting relationship with the confronting surface portion of said other of said nozzle sections, said piston means including a piston body and a plurality of parallel grooves which extend into the surface of said piston body distal from said separating plane a substantial distance so as to impart deformability thereto.

2. A nozzle as in claim 1, and further including sealing means for impeding passage of fluid between the periphery of said piston means and thereto adjacent surfaces of said cavity.

3. A nozzle as in claim 1, wherein said grooves extend transversely into the surface of said piston body distal from said separating plane.

4. A nozzle as in claim 3, wherein said piston means further includes additional grooves extending longitudinally into the surface of said piston body distal from said separating plane.

5. A nozzle as in claim 1, wherein said piston means further includes a flexible sealing member overlying the surface of said piston body distal from said separating plane and having edge portions engaging side wall surfaces of said cavity.

6. A nozzle as in claim 5, wherein said flexible sealing member comprises a thin plate, and further including a sealing ring extending about the juncture between said plate edge portions and said side wall surfaces of said cavity.

7. A nozzle as in claim 6, and further including frame means within said cavity for supporting said sealing ring, said frame means having a shape corresponding substantially to the cross-sectional shape of said cavity and having a peripheral recess opeing toward said juncture between said plate and said cavity, said sealing ring being received within said recess.

8. A nozzle as in claim 1, and further including a common pressurized fluid source connected to said passageway means and said means for introducing a pressurized fluid into said cavity.

9. A nozzle as in claim 1, wherein said piston body has a groove of semi-circular cross-section shape extending longitudinally of the surface thereof adjacent said separating plane, said groove defining part of said yarn duct.

10. A nozzle as in claim 1, wherein said nozzle further includes a perforated stuffer box disposed adjacent the outlet end of said yarn duct for receiving and forming a compressed plug from the advancing yarn exiting from said duct, said stuffer box being divided into two halves lying upon opposite sides of said separating plane, one of said stuffer box halves being fixedly connected to one of said nozzle sections, and the other of said stuffer box halves being fixedly connected to the other of said nozzle sections.

11. A nozzle as in claim 1 wherein said passageway means includes a passageway which communicates with said duct in an inclined direction so that the entering fluid tends to advance the yarn along said duct.

12. In a nozzle for texturing an advancing yarn with pressurized fluid such as hot air, said nozzle comprising a duct through which the yarn is adapted to pass at high speed, and passageway means for conducting a heated pressurized fluid into said duct during operation of said nozzle, said nozzle further comprising two confronting sections separable along a separating plane extending through and generally longitudinally of said duct, said sections being in abutting relationship with each other during operation of said nozzle while being separable from each other to facilitate insertion of yarn into said duct, the improvement comprising:

one of said nozzle sections having a cavity confronting and opening in the direction of the other of said nozzle sections, with said cavity extending over a substantial portion of the length and width of the other of the nozzles sections, and means for introducing pressurized fluid into said cavity,

and piston means mounted in said cavity for movement, in response to the pressure of fluid within said cavity, into abutting relationship with the confronting surface portion of said other of said nozzle sections, said piston means comprising a piston body and a flexible sealing thin plate overlying the surface of said piston body distal from said separating plane and having edge portions engaging side wall surfaces of said cavity, said piston body being deformable by the pressure of the fluid within said cavity so as to substantially conform to any unevenness of the confronting surface portion of said other of said nozzle sections.

13. A nozzle as in claim 12 further including a sealing ring extending about the juncture between said plate edge portions and said side wall surfaces of said cavity.

14. A nozzle as in claim 13 further including frame means within said cavity for supporting said sealing ring, said frame means having a shape corresponding substantially to the cross-sectional shape of said cavity and having a peripheral recess opening toward said juncture between said plate and said cavity, said sealing ring being received within said recess.

15. A nozzle as in claim 12, and further including a common pressurized fluid source connected to said passageway means and said means for introducing a pressurized fluid into said cavity.

16. A nozzle as in claim 12, wherein said piston body has a groove of semi-circular cross-section shape extending longitudinally of the surface thereof adjacent said separating plane, said groove defining part of said yarn duct.

17. A nozzle as in claim 12, wherein said nozzle further includes a perforated stuffer box disposed adjacent the outlet end of said yarn duct for receivig and forming a compressed plug from the advancing yarn exiting from said duct, said stuffer box being divided into two halves lying upon opposite sides of said separatig plane, one of said stuffer box halves being mounted to said one of said nozzle sections, and the other of said stuffer box halves being mounted to said other of said nozzle sections.

18. In a nozzle for texturing an advancing yarn with pressurized fluid such as hot air, said nozzle comprising a duct through which the yarn is adapted to advance at high speed, and passageway means for conducting a heated pressurized fluid into said duct during operation of said nozzle, said nozzle further comprising two confronting sections separable along a separating plane extending through and generally longitudinally of said duct, said sections being in abutting relationship with each other during operation of said nozzle while being separable from each other to facilitate insertion of yarn into said duct, the improvement comprising:

one of said nozzle sections having a cavity confronting and opening in the direction of the other of said nozzle sections, with said cavity extending over a substantial portion of the length and width of the other of the nozzle sections, and means for introducing pressurized fluid into said cavity,

piston means mounted in said cavity for movement, in response to the pressure of fluid within said cavity, into abutting relationship with the confronting surface portion of said other of said nozzle sections,

a perforated stuffer box disposed adjacent the outlet end of said yarn duct for receiving and forming a compressed plug from the advancing yarn exiting from said duct, said stuffer box being divided into two halves lying upon opposite sides of said separating plane, with one of said stuffer box halves being fixedly mounted to said piston means, and the other of said stuffer box halves being mounted to said other of said nozzle sections, and

said one of the nozzle sections having a downwardly projecting extension, and biasing means carried by the extension for urging the stuffer box halves into firm engagement.