Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D4/00—Spinnerette packs; Cleaning thereof
  • D01D4/02—Spinnerettes
  • D01D4/022—Processes or materials for the preparation of spinnerettes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
  • B23P25/00—Auxiliary treatment of workpieces, before or during machining operations, to facilitate the action of the tool or the attainment of a desired final condition of the work, e.g. relief of internal stress
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
  • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
  • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
  • B23Q3/06—Work-clamping means
  • B23Q3/08—Work-clamping means other than mechanically-actuated
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
  • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/4981—Utilizing transitory attached element or associated separate material
  • Y10T29/49812—Temporary protective coating, impregnation, or cast layer

Definitions

• This invention relates to an improved method of polishing foraminous devices but particularly has for its object the polishing of spinnerettes or spinning nozzles which are used in the manufacture of filaments or threads of artificial origin.
• the first step in the process is the stamping out of the body of the spinnerette in the form of a cylinder closed at one end and having an outwardly extending annular flange at the other end.
• the closed end is called the draw plate and is that part of the spinnerette which has the extrusion openings formed therein through which the spinning solution is expressed or extruded.
• the openings in the draw plate are usually made by forming hollow imperforate projections in the said draw plate.
• the point of the inner surface of the hollow projection extends below the plane of the outer surface of the draw plate so that when the projection is subsequently removed by any suitable means, such as grinding it off, an opening appears.
• These openings are then punched from the opposite'side and the spinnerette is then ready for the final step in the manufacture thereof.
• the spinnerettes used are usually made from precious metals and it is necessary to polish them after the holes have been formed therein.
• the polishing of spinnerettes has a decidedly important effect upon the satisfactory operation of the spinnerette during the spinning process in the manufacture of artificial silk filaments. It is during the polishing 5 step that the openings of the draw plate are frequently irremediably injured due to thin ridges being formed in the openings, or the edges of the openings may be polished off completely.
• Another object of the present invention is to 50 devise a method whereby the extrusion openings are protected during the polishing operation.
• the openings in spinnerette nozzles may be preserved in perfect condition during the polishing operation, if the openings prior to polishing are filled up with a solid, bubbleless nonbrittle, but correspondingly hard substance which possesses the quality of protecting the edges of the spinnerette openings during the said polishing operation, and which may be completely removed from the said openings after the spinnerettes have been completely polished.
• the proportions of the two substances may be varied, but for gold-platinum alloy spinnerettes a mixture of borax and A; litharge has given the best results.
• the filling of the spinnerette openings takes place in the molten state, i. e., the openings are filled with the melted mixture which is then allowed to harden therein.
• the solid filling substances may be easily and readily removed by any suitable means, such as by means of heated strong nitric acid.
• a'process for polishing platinum-gold al- 10y spinnerettes having openings formed therein the steps comprising filling the said openings with a. molten mixture of borax and litharge, al- 10 lowing the mixture to harden therein, then polture from said openings with heated nitric acid.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=7987837

Family Applications (1)

Country Status (2)

Cited By (3)

Families Citing this family (1)

• 0
  • NL NL42439D patent/NL42439C/xx active
• 1936
  • 1936-05-04 US US77897A patent/US2159391A/en not_active Expired - Lifetime

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