Yarn texturing apparatus

Abstract

There is provided apparatus for converting between a medium tenacity yarn producing machine and a high tenacity yarn producing machine. The apparatus comprises a pulley (40) adapted to be driven by a motor after removal of a multi-disc texturing unit (11) of the medium tenacity yarn producing machine from a casing (14). A bracket (30) is securable to the casing (14) with the pulley (40) mounted to the bracket (30) by means of a bearing unit (46) such that the pulley (40) is rotatable relative to the bracket (30). The bracket (30) has one or more mounting points to which a pin spindle texturing unit (20) of the high tenacity yarn producing machine can be attached. An endless drive belt (50) connects the pulley to a drive shaft (24) of the pin spindle texturing unit (20). The diameter of the pulley (40) is greater than the diameter of the drive shaft (24), and the diameter of a drive disc (23) of the pin spindle texturing unit (20) s larger than the diameter of a disc pin spindle (21) of the unit (20).

1 . Apparatus for converting between a medium tenacity yarn producing machine and a high tenacity yarn producing machine, the medium tenacity machine including a variable speed electric motor which is disposed within a casing and which drives a multi-disc texturing unit mounted on the casing, and the high tenacity machine including a pin spindle texturing unit having a pin spindle adapted to be driven in rotation by a drive disc mounted on a drive shaft with the disc pin spindle also engaging an idler disc mounted on a rotatable idler shaft and being held against the two discs by magnetic force, said apparatus comprising:
 a pulley adapted to be driven by the electric motor after removal of the multi-disc texturing unit from the casing;   a bracket adapted to be secured to the casing, the pulley being mounted to the bracket by means of a bearing unit such that the pulley is rotatable relative to the bracket, wherein the bracket incorporates one or more mounting points to which the pin spindle texturing unit can be attached in use; and   an endless drive belt for connecting the pulley to the drive shaft of the pin spindle texturing unit, the diameter of the pulley being larger than the diameter of the drive shaft and the diameter of the drive disc being larger than the diameter of the disc pin spindle.   
     
     
         2 . The apparatus as claimed in  claim 1  wherein the bracket is substantially L-shaped having a lower base and a wall upstanding therefrom. 
     
     
         3 . The apparatus as claimed in  claim 2  wherein the bearing unit is mounted on the lower base and the pulley is disposed above the bearing unit with a shaft of the pulley being mounted in the bearing unit for engagement with an output shaft of the electric motor. 
     
     
         4 . The apparatus as claimed in  claim 2  wherein the upstanding wall provides the mounting points for the attachment of the pin spindle texturing unit. 
     
     
         5 . The apparatus as claimed in  claim 4  wherein the upstanding wall has an aperture through which the endless drive belt passes. 
     
     
         6 . The apparatus as claimed in  claim 5  wherein there is further provided a cover for the pulley and the bearing unit, the cover incorporating an opening at one side through which the endless belt passes, wherein the opening is adjacent the aperture in the upstanding wall and wherein the cover is secured to the bracket. 
     
     
         7 . The apparatus as claimed in  claim 6  wherein the cover is provided with a number of holes about its periphery, the holes preferably being in the form of spaced slots extending axially relative to the axis of rotation of the pulley. 
     
     
         8 . The apparatus as claimed in  claim 1 , wherein the pulley has axially extending teeth and the drive belt is correspondingly toothed to mesh therewith. 
     
     
         9 . A method of converting from a medium tenacity yarn producing machine to a high tenacity yarn producing machine using the apparatus as claimed in  claim 1  comprising the steps of:
 removing the multi-disc texturing unit from the casing, 
 attaching the bracket with pulley and bearing unit to the casing, 
 attaching the pin spindle texturing unit to the bracket, 
 connecting the endless belt drive to the pulley and to the drive shaft of the pin spindle texturing unit.