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Apparatus-for-melt-spinning

Melt blow die

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O THE DRAWING With general reference to the drawing for like parts and particular reference to FIGS...

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Meltblowing die

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Method of forming a web of melt blown layered fibers

The present invention is directed to a process for producing a non-woven web of longitudinally ...

Meltblowing die

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Apparatus for melt-spinning

Details

Inventors: Kilsdonk, Harley;
Assignee: Akzo N.V. (Arnhem, NL)
Primary Examiner: Baldwin; RobertD.
Assistant Examiner:
Attorney, Agent or Firm: Stevens, Davis, Miller & Mosher

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.

DETAILED DESCRIPTION I claim: 1.
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.
2.
The apparatus of claim 1 wherein the said closure member provided with a sloping face is in the form of a removably secured lid.
3.
The apparatus of claim 2 wherein the lid is secured to the remaining part of the housing by means of a screw thread.
4.
The apparatus of claim 1 wherein the said sloping faces of the upper part and of the jacket are conical.
5.
The apparatus of claim 1 wherein the assembly housing is substantially formed by an externally cylindrical lower part and a communicating externally conical upper part whose diameter increases upwardly.
6.
The apparatus of claim 1 wherein the assembly has a long cross-sectional shape in the direction transverse to its vertical direction.
7.
The apparatus of claim 6 wherein transverse to the vertical direction of the assembly its upper part has a rectangular cross-sectional shape and at one or at both of the long sides of the rectangle there is provided a flat face which is inclined in the longitudinal direction of the assembly and can cooperate with a correspondingly sloping flat face on the inside of the jacket.
8.
The apparatus of claim 7 wherein said cooperating sloping flat faces of the upper part and the jacket are provided with communicating bores which connect with supply channels running through the upper part

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