US1791785A - Tantalum spinneret - Google Patents
Tantalum spinneret Download PDFInfo
- Publication number
- US1791785A US1791785A US282400A US28240028A US1791785A US 1791785 A US1791785 A US 1791785A US 282400 A US282400 A US 282400A US 28240028 A US28240028 A US 28240028A US 1791785 A US1791785 A US 1791785A
- Authority
- US
- United States
- Prior art keywords
- spinneret
- tantalum
- openings
- holes
- tantalum spinneret
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
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
Definitions
- the object of this invention is to providera spinneret which will not be corroded either in the fluids in which the spinneret is finally used or in thek fluid used to dissolve the cores in obtaining the minute openings.
- A. further object is to provide a spinneret with a hard enamel-like iilmxwhereby the shape of the openings are not irregularly worn.
- Fig. l is a perspective of my improved spinneret having a portion broken or out away to show the construction thereof.
- k Fig. 2 is a diagrammatic representation of the film forming bath.
- Fig. l I have shown a spinneret l0 of conventional type which is provided with ay face plate ll'in which are drilled a plurality of holes 13.
- the tantalum Since the tantalum must be relativelymaL leable to permit forming the holes 13 therein, it is necessary that its surface be hardened if it is to resistthe wear to which it must be subjected. To accomplish this I immerse the spinneret in sulphuric acid bath (specific gravity about 1.250) and subject it to an electric potential of about 2O to 110 volts.
- sulphuric acid bath specifically gravity about 1.250
- time of immersion will necessarily vary with the immersed area of the spinneret but I have found that by using alternating current of 110 volts the proper film is formed on an area of 10 square inches by subjecting it to this potential for about 30 seconds, a resistance of about 8O ohms being in the circuit as shown in Fig. 6.
- a simple apparatus for electrolytically filming the spinneret consists of a suitable metallic receptacle 18 containing sulphuric acid 19. 'Ihe container is connected by a conductor 2O to an alternating current source l which is, in turn, connected by'conductor 22 to variable resistance 23, this resistance being connected by conductor 24 to the spinneret as shown in Fig. 6.
- the resistance in Vmy preferred embodiment is about 80 ohms and the alternating current source is' 110 PAT-ENI orsi-Scsi,
- the electrolytic film not only increases the hardness and wear resista-nce of the metal but it provides a highly decorative film of vari-colored irridescentV nature, which is characteristic of this metal.
- the decorative feature forms no part of the present invention.
- An article of manufacture comprising a tantalum spinneret and a hard resistant oxide film formed directly thereon whereby said tantalum spinneret is protected against corrosion and wear.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Description
Feb. 1-0, 1931. M. M. AUSTIN TANTALUM SPINNERET Original Filed June 2. 1928 Patented Feb. 10, 1931 UNITED Sra'rss MINER M. AUSTIN, or WAUKEGAN, ILLINOIS ASSIGNOR 'rojIiANs'rEEn PRODUCTS COMPANY, INC., OI` NORTH CHICAGO, ILLINOIS, A ConroRe'rIoN or ILLINOIS TANTALUM SPINNERET Application filed .Tune 2, 1928, Serial No. 282,490. Renewed October ,27, 1930.
spinneret of tantalum which is coated by al hard electrolytic film whereby the minute openings are' not distorted or worn out of shape by continued usage. The object of this invention is to providera spinneret which will not be corroded either in the fluids in which the spinneret is finally used or in thek fluid used to dissolve the cores in obtaining the minute openings.
A. further object is to provide a spinneret with a hard enamel-like iilmxwhereby the shape of the openings are not irregularly worn.
Other objects of my invention will be apparent as thev detailed description of my invention proceeds.
A preferred embodiment of the invention is illustrated in the accompanying drawing wherein similarparts are designated by like reference characters throughout the several views and wherein Fig. l is a perspective of my improved spinneret having a portion broken or out away to show the construction thereof.
k Fig. 2 is a diagrammatic representation of the film forming bath.
The manufacture of artificial silk or rayon requiresy the use of spinnerets which have very fine Openings and in which the openings are circular. If the openings are distorted or flat therayon produced Vwill be of an inferior quality and will only demand about One-third of the market price.
Heretofore such spiunerets have been made of platinum, platinum gold alloys, etc., because these were the only metals known which combined suitable acid resisting qualities with a malleability and hardness which would permit the drilling of the extremely small holes and which would prevent these holes from being deformed by usage. Tantalum had been tried without success because the metal was so hard that the holes could not be properly drilled. If the metal were softened or annealed to overcome this difliculty the holes were likelyT to be deformed by subsequent use.
l have discovered that by coating the spinE neret with an electrolytic-film, a hardenamellike surface is formed' thereon which is Y of infinitesimal thickness, but which, .nevertheless, is extremely resistant and'which renders thespinneretpractically impervious to corrosive action and to the erosion` orv wearing awayidue to continuedusage.
In Fig. l I have shown a spinneret l0 of conventional type which is provided with ay face plate ll'in which are drilled a plurality of holes 13.
Since the tantalum must be relativelymaL leable to permit forming the holes 13 therein, it is necessary that its surface be hardened if it is to resistthe wear to which it must be subjected. To accomplish this I immerse the spinneret in sulphuric acid bath (specific gravity about 1.250) and subject it to an electric potential of about 2O to 110 volts. The
time of immersion will necessarily vary with the immersed area of the spinneret but I have found that by using alternating current of 110 volts the proper film is formed on an area of 10 square inches by subjecting it to this potential for about 30 seconds, a resistance of about 8O ohms being in the circuit as shown in Fig. 6.
A simple apparatus for electrolytically filming the spinneret consists of a suitable metallic receptacle 18 containing sulphuric acid 19. 'Ihe container is connected by a conductor 2O to an alternating current source l which is, in turn, connected by'conductor 22 to variable resistance 23, this resistance being connected by conductor 24 to the spinneret as shown in Fig. 6. The resistance in Vmy preferred embodiment is about 80 ohms and the alternating current source is' 110 PAT-ENI orsi-Scsi,
infinitesimal thickness, said lm also serving to protect the openings inthe face of the spinneret as shown in Fig. 1. The electrolytic film not only increases the hardness and wear resista-nce of the metal but it provides a highly decorative film of vari-colored irridescentV nature, which is characteristic of this metal. The decorative feature, however', forms no part of the present invention.
While I have described a preferred embodiment of my invention it is understood that I am not limited to the details thereof, except as confined by the following claim.
An article of manufacture comprising a tantalum spinneret and a hard resistant oxide film formed directly thereon whereby said tantalum spinneret is protected against corrosion and wear.
In witness whereof, I hereunto subscribe my name this 24th day of May, 1928.
MINER M. AUSTIN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US282400A US1791785A (en) | 1928-06-02 | 1928-06-02 | Tantalum spinneret |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US282400A US1791785A (en) | 1928-06-02 | 1928-06-02 | Tantalum spinneret |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1791785A true US1791785A (en) | 1931-02-10 |
Family
ID=23081352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US282400A Expired - Lifetime US1791785A (en) | 1928-06-02 | 1928-06-02 | Tantalum spinneret |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1791785A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE747639C (en) * | 1938-11-03 | 1944-10-09 | Precious metal spinning nozzle for the production of casein threads | |
| US3060500A (en) * | 1959-09-01 | 1962-10-30 | Du Pont | Composite spinneret plate unit |
| US3199999A (en) * | 1961-03-23 | 1965-08-10 | Hi Shear Corp | Pigment of titanium having titanium oxide coating; electrolytic method of making pigment; and reflector and paint containing same |
| US4054468A (en) * | 1976-09-07 | 1977-10-18 | E. I. Du Pont De Nemours And Company | Process of making a laminated spinneret |
| US5512113A (en) * | 1993-11-09 | 1996-04-30 | E. I. Du Pont De Nemours And Company | One-piece single metal spinneret having softened capillary zone |
-
1928
- 1928-06-02 US US282400A patent/US1791785A/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE747639C (en) * | 1938-11-03 | 1944-10-09 | Precious metal spinning nozzle for the production of casein threads | |
| US3060500A (en) * | 1959-09-01 | 1962-10-30 | Du Pont | Composite spinneret plate unit |
| US3199999A (en) * | 1961-03-23 | 1965-08-10 | Hi Shear Corp | Pigment of titanium having titanium oxide coating; electrolytic method of making pigment; and reflector and paint containing same |
| US4054468A (en) * | 1976-09-07 | 1977-10-18 | E. I. Du Pont De Nemours And Company | Process of making a laminated spinneret |
| US5512113A (en) * | 1993-11-09 | 1996-04-30 | E. I. Du Pont De Nemours And Company | One-piece single metal spinneret having softened capillary zone |
| US5512114A (en) * | 1993-11-09 | 1996-04-30 | E. I. Du Pont De Nemours And Company | One-piece single metal spinneret and method for making it |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3417089B1 (en) | Articles including a multi-layer coating and methods | |
| US3268307A (en) | Process of electrodepositing a corrosion resistant nickel-chromium coating and products thereof | |
| US4673468A (en) | Commercial nickel phosphorus electroplating | |
| US2646396A (en) | Method of making electroformed articles | |
| CN104911648B (en) | The acid matt silver electroplating composition and method of cyanide-free | |
| JP2009282003A (en) | Contact member | |
| US1791785A (en) | Tantalum spinneret | |
| Torabinejad et al. | Corrosion properties of Ni‐Fe‐Cr (III) multilayer coating synthesized via pulse duty cycle variation | |
| US2658266A (en) | Laminated coating | |
| US3298802A (en) | Method for covering objects with a decorative bright-nickel/chromium coating, as well as objects covered by applying this method | |
| Kamel et al. | Electrodeposition of nanocrystalline Ni–Cu alloy from environmentally friendly lactate bath | |
| Srivastava et al. | Electrodeposition of binary alloys: an account of recent developments | |
| US1750418A (en) | Etching and decorating metal surfaces | |
| US3749652A (en) | Crack-free hard chrome | |
| US1564581A (en) | Electroplating | |
| US1782092A (en) | Articles having tarnish-resisting surface and process of making same | |
| Dini et al. | Plating on some difficult-to-plate metals and alloys | |
| US3540988A (en) | Coating method | |
| US3515651A (en) | Plating solutions for rhodium and rhodium alloy platings having low internal stress | |
| US1813842A (en) | Process of producing protective metal coatings | |
| Rajagopal | Electroless and electrodeposition of nickel boron composites | |
| US2371529A (en) | Removal of electrodeposited metals | |
| US2051663A (en) | Process of obtaining perforations in metal | |
| US2568780A (en) | Rectifier manufacturing process and products obtained thereby | |
| Horner | Electroplating |