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US 4,050,866 AGranted
Apparatus for melt-spinning
AssigneeAkzo N.V.
InventorHarley Kilsdonk
Life of this patent
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AssigneeAkzo N.V.
InventorHarley Kilsdonk
Estimating the term…
An apparatus for melt-spinning a polymer such as a polyamide or polyester has a heating jacket provided with a cavity which accommodates a spinning assembly. Preferably, the spinning assembly is exchangeable in the jacket from above and includes a housing adapted to contain a molten polymer and a spinnerette plate near one end thereof. The opposite end of the housing is closed with a lid which extends partially within the housing and partially outside the housing. That portion of the lid which extends outside the housing has a peripheral surface which slopes radially outwardly from the wall of the housing in the direction moving longitudinally from the housing. In a cylindrical vessel the sloping portion of the lid is frusto-conically shaped. The jacket is provided with a portion of gradually increasing diameter to accommodate the lid. A clamping member having diametrically opposite radially outwardly extending ears has a bore threaded in one direction and aligned with a bore in the lid threaded in the opposite direction. A threaded rod is threadably secured in the bore of the clamp and the bore of the lid to secure the two together. An annular groove is provided in the wall of the jacket and the ears on the clamping member are disposed in the groove by rotation of the assembly in the jacket to lock the assembly of clamp, lid and housing in the cavity of the jacket.
An apparatus for the manufacture of synthetic threads by the melt-spinning method comprising a heating jacket, a spinning assembly disposed in the jacket, said spinning assembly having a housing having two open ends and surrounding a compartment for polymer to be spun, a spinnerette plate having spinning orifices across a first of said ends, a closure member having a first portion which fits in the second of said ends and a second portion which has a sloping face which extends radially outwardly from the first portion outside the housing, said jacket having a sloping surface which bears against the sloping face of the closure member, and means for producing polymer to be spun into the compartment including a bore through the sloping surface of said jacket which communicates with a bore through the sloping face of said closure member.
In an apparatus for melt-spinning a polymer having a heated jacket and a spinning assembly comprising a housing enclosed by the jacket and having a spinnerette plate at one end for the extrusion of filaments, the improvement which comprises a detachable lid closing a second end of the housing having a first portion conforming to the dimensions and shape of the said second end and disposed within the housing, a second portion integral with the first and having a sloping peripheral surface which slopes radially outwardly and longitudinally from the first portion, said jacket having a cavity therein in which said housing is disposed and having a sloping radially outwardly extending portion corresponding to the dimensions and shape of the sloping portion of the lid for the accommodation thereof, means in said jacket and lid for introducing molten polymer into the housing, said lid having a first longitudinally extending annular flange about the periphery thereof projecting longitudinally above the portion having the sloping peripheral surface, and a second concentric annular flange encircling the longitudinal axis of the lid, the internal surface of the second flange having a left-hand thread, a clamping member disposed on the lid having an axial bore aligned with the bore of the second flange and having a right-hand thread on its inner surface, a bolt having a right-hand thread at one end and a left-hand thread at its opposite end threadably secured in the bores of the second flange and the clamp securing the lid clamp to the lid, a pair of diametrically opposite ears on the clamping member extending outwardly therefrom, and complimentary grooves in the jacket whereby said clamping member can be rotated to dispose the ears in the groves and lock the clamp and spinning assembly in the jacket.
Dependencies are inferred from the claim text.