Melt spinning apparatus and method
AssigneeBarmag AG
InventorsHans-Peter Berger, Ralph Sievering
Life of this patent
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Abstract
A melt spinning apparatus adapted for spinning a plurality of preferably monofilaments each having a denier which is maintained within close tolerances. The apparatus comprises a nozzle head having a plurality of vertical bores which are annularly arranged about a central axis and a nozzle assembly in each of the bores. A separate melt delivery system delivers pressurized melt to each nozzle assembly, and in a preferred embodiment, each separate melt delivery system comprises one of the discharge outlets of a planetary gear pump.
Claims17
A method of simultaneously melt spinning a plurality of monofilaments, with each having a denier which is maintained within close tolerances, and comprising the steps of
- providing a nozzle head having a plurality of vertical bores therein, with a nozzle assembly positioned in each of said bores, and with each nozzle assembly comprising a melt delivery duct communicating with the upper portion of the bore and a spinning nozzle positioned at the lower portion of the bore and having one opening extending vertically therethrough, and
- delivering a pressurized melt to said delivery duct of each of said nozzle assemblies from a separate melt delivery means, and such that the pressurized melt is extruded downwardly through the spinning nozzle of each nozzle assembly to form a new filament therefrom, with all of said melt delivery means being synchronously driven by a single shaft, and with said separate melt delivery means being arranged circularly about said shaft so that substantially the same torque is delivered to all of said melt delivery means.
A melt spinning apparatus for spinning a plurality of synthetic filaments and comprising
- a heater box having a cylindrical inside jacket defining a cylindrical nozzle shaft which defines a central axis and which is open at its bottom,
- block means having ak plurality of melt delivery lines therein and positioned in said nozzle shaft so as to close the nozzle shaft at its upper portion,
- a nozzle head comprising a cylindrical body and being closely received in the lower portion of the nozzle shaft and being attached to the bottom of said block means, said nozzle head having a plurality of vertical bores therein positioned in a generally circular arrangement about said central axis of said nozzle shaft,
- a nozzle assembly positioned in each of said bores, with each nozzle assembly comprising a melt delivery duct communicating with one of the delivery liens in said block means, and a spinning nozzle positioned in the lower portion of the bore and having at least one opening extending vertically therethrough, and
- separate power-driven melt delivery means for delivering pressurized melt at a predetermined flow rate through each of said melt delivery lines and through each of said melt delivery ducts and such that the pressurized melt is delivered to each nozzle assembly and extruded downwardly through respective openings in each of said spinning nozzles of each nozzle assembly, and rotary means positioned coaxially relative to said central axis for commonly driving said separate melt delivery means, and with said separate melt delivery means being circularly arranged around said rotary means.
A melt spinning apparatus for spinning a plurality of synthetic filaments and comprising
- a heater box having a cylindrical inside jacket defining a cylindrical nozzle shaft which defines a central axis and which is open at its bottom,
- block means having ak plurality of melt delivery lines therein and positioned in said nozzle shaft so as to close the nozzle shaft at its upper portion,
- a nozzle head comprising a cylindrical body and being closely received in the lower portion of the nozzle shaft and being removably attached to the bottom of said block means by means of a threaded member which extends along said central axis, said nozzle head having a plurality of vertical bores therein positioned in a generally circular arrangement about said central axis of said nozzle shaft,
- a nozzle assembly positioned in each of said bores, with each nozzle assembly comprising a melt delivery duct communicating with one of the delivery liens in said block means, and a spinning nozzle positioned in the lower portion of the bore and having at least one opening extending vertically therethrough, and
- separate melt delivery means for delivering pressurized melt at a predetermined flow rate through each of said melt delivery lines and to each of said melt delivery ducts and such that the pressurized melt is delivered to each nozzle assembly and extruded downwardly through respective openings in each of said spinning nozzles of each nozzle assembly.
Dependencies are inferred from the claim text.