Method For Producing A Multifilament Composite Thread And Melt Spinning Device

Abstract

The invention relates to a device for the production of strand-shaped products such as synthetic bands, fiber strands, monofilaments, or films, which are extruded from a polymer melt. The device comprises an extrusion device, a cooling device, several rolling feed units and several processing devices mounted between the rolling feed units. In order to obtain short control paths and compact machine units, the processing devices according to the invention are arranged in tiers one above the other, wherein the rolling feed units face each other at both ends of the processing devices so that the product passes through the processing devices in the opposite direction.

1 . A method for the production of a multifilament composite thread in a melt spinning process comprising;
 extruding numerous of filament strands with a plurality of spinnerets;   pulling off the filament strands from the spinnerets and dividing the filament strands into a plurality of filament bundles;   drawing the filament bundles and combining the filament bundles to form the composite thread,   wherein the filament bundles pass through a plurality of preparation stations for wetting after cooling such that the filament bundles pass through a first preparation station with or without, selectively, a supplementary wetting.   
     
     
         2 . The method according to  claim 1  wherein the filament bundles receive a main wetting in a second preparation station after the drawing. 
     
     
         3 . The method according to  claim 2  wherein the main wetting of the filament bundle is applied with the same or different fluid applications to each of the filament bundles. 
     
     
         4 . The method according to  claim 1  wherein after the dividing of the filament strands, the filament bundles, without a supplementary wetting are twisted by means of an air treatment during the pulling-off. 
     
     
         5 . The method according to  claim 1  wherein the filament bundles are drawn individually or collectively adjacent to one another with an S-guidance or Z-guidance through a plurality of godets. 
     
     
         6 . The method according to  claim 1  wherein the filament bundles are combined by means of a swirling to form the composite thread. 
     
     
         7 . The method according to  claim 6  wherein the filament bundles are individually textured prior to the swirling. 
     
     
         8 . The method according to  claim 1  wherein the filament bundles are combined by means of a texturing to form the composite thread. 
     
     
         9 . The method according to  claim 1  wherein each of the filament bundles receives a supplementary wetting in the first preparation station, in a process start-up. 
     
     
         10 . A melt spinning device for extruding numerous filaments for the production of a multifilament composite thread comprising:
 a bundling device for separating the filaments into a plurality of filament bundles;   a pull-off device adjacent a drawing device;   a compacting device; and,   a preparation device that includes a plurality of preparation stations, wherein each preparation station includes a preparation site for each filament bundle, such that each preparation site of a first preparation station is configured such that it can be selectively activated or deactivated for applying a supplementary wetting to each filament bundle.   
     
     
         11 . The melt spinning device according to  claim 10  wherein preparation sites of a second preparation station are disposed downstream of the drawing device for applying a main wetting to the filament bundles. 
     
     
         12 . The melt spinning device according to  claim 10  wherein the preparation sites of the first preparation station and/or the preparation sites of the second preparation station are configured such that they can be controlled separately. 
     
     
         13 . The melt spinning device according to  claim 10  wherein the preparation sites of the first preparation station are disposed downstream of a swirling nozzle unit having a plurality of swirl nozzles. 
     
     
         14 . The melt spinning device according to  claim 10  wherein the pull-off device and the drawing device include a plurality of godets, wherein godets adjacent to one another in a thread course are configured to be driven in opposite directions to implement an S-guide or a Z-guide. 
     
     
         15 . The melt spinning device according to  claim 10  wherein the compacting device includes at least one swirling unit through which the filament bundles are combined to form the composite thread. 
     
     
         16 . The melt spinning device according to  claim 15  wherein a plurality of texturing units are disposed upstream of the compacting device to individually texture the filament bundles. 
     
     
         17 . The melt spinning device according to  claim 10  wherein the compacting device includes at least one texturing unit to combine the filament bundles and form the composite thread by means of the texturing.