US2416535A - Apparatus for wet treatment and drying of a moving wet spun synthetic thread strand - Google Patents

Description

APEARATUS FOR WET TREATMENT AND DRYING OF A MOVING WET SPUN SYNTHETIC THREAD STRAND Original Filed July '14, 1942 2 Sheets-Sheet 1 Feb. 25, 1947,. O NAUMAN'N 2,416,535

" flrlerl0laumm 2,416,535 AND DRYING OF A IC'THRE Feb. 1947. H. o; NAUMANN APPARATUS FOR WET TREATMENT MOVING WET SPUN SYNTHET AD STRAND Original Filed July 14, 1942 2 Sheets-Sheet 2 n n8. .8. 3. Qs

3. A N QR A um. Nu m A mmy s Patented Feb. 25, 1947 APPARATUS FOR WET TREATMENT AND DRYING OF A MOVING WET SPUN SYN- THETIC THREAD STRAND Herbert 0. Naumann,Englewood, N.

J assignor to North American Rayon Corporation, New York, N. Y., a corporation of Delaware Original application July 14,

Divided and this application June 3, 1943, Serial 170.489, 552- I Claims. ((71. 68-200) This invention relates to the treatment of apparatus for wet treatment and drying a moving thread strand.

It has long been recognized in the textile arts that thread in extended form can be more readily wet treated and dried than is possible if the thread is wound in packages composed of superposed helical layers. In such processes, for instance, as in'the after-treatment of thread of synthetic origin, in the coating and impregnating of thread or strands, such as the coating of fishing lines or insulating strands with varnish and in extended form. In many instances the patents above referred to disclose not only wet treating but drying the thread in the course of its travel in extended form or while it is being advanced in the form of a single layer of travelling helices.

The primary object of this invention is to i'acilitate the wet treatment and drying of thread while it is being advanced in extended rorm.

Another object is to establish a definite line of demarcation between different treating zones of a thread-advancing thread-store device upon which the thread to be treated is supported in the tom of a single layer of travelling helices.

The above and other objects may be attained by employing this invention, which embodies among its features a thread-advancing threadstore device separated longitudinally into at least one liquid treating zonejand a heated drying zone and means to inhibit the conduct of heat from the drying zone to an adjacent zone.

Figure 1 is a view partially in section and partially in side elevation of a thread-storage, thread-advancing unit embodying this invention;

Figure 2 is a development of the cylindrical surface constituting a portion of the cooling zone of the upper roller 01! the thread-storage, threadadvancing device oi Figure 1;

- thread, and is more particularly concerned with 1942, Serial No.

2 Figure 3 is a fragmentary view in section'of the cylinder developed in Figure 2;

Figure 4 is a longitudinal sectional view oi a roller of a thread-storage, thread-advancing unit constructed of a carbon-graphite composition.

Thread-storage, thread-advancing unit is composed of two rollers I25 and I21 which are driven from shafts I34 and I28, respectively, through spiders 24I and 242, keyed respectively at 243 and 244, as can be seen in Figure 1. Note also that housings I38 and I32 extend well into rollers I26 and I21 so that bearings 245 and 246 may be located on shafts I34 and I28 a substantial distance toward the unsupported end of the device. The shaft I28 of lower roller I21 extends in a truly horizontal direction while the shaft I34 of the upper roller I26 extends in a sloping direction, such that the axes of the two rollers I21 and I26 are convergent in the direction of their unsupported ends, and the rollers themselves lie in intersecting planes.

Spider 24I is provided with a cylindrical portion 241 over which a cylinder 248 is pressed. This cylinder is provided with an annular flange 249. Roller I26 includes, in addition to cylinder 248, cylinders 250 and 25I, and shouldered annular members 252 and 253. The cylinders are fitted over the shouldered portions of annular members 252 and 253. Integral with or attached to cylinder 25I is a spider 254 provided with a central hub 255 through which the threaded free end 256 of a shaft I34 is passed. A nut 251 may 'be drawn against a washer 258 to pull cylinder 25I toward cylinder 248, thereby holding the intermediate annular members and cylinder 250 so that the entire assembly may function as a unit.

Practically an identical arrangement is used in drawingtogether the component parts of roller I21. In the latter case, shaft I28 is provided with a threaded end 259 passing through a central aperture in a spider 260 integral with an annular member 26I, and a nut 262 engaging shaft end 259 serves to draw together all of the components of roller I21 between annular member 26I and a cylinder 263, similar to cylinder 24B of roller I26. Cylinder 264 is pressed over a shoulderoi annular member 26I so that it need not be subjected to the compressive force exerted by nut 262. Between annular member 26I and cylinder 263, two cylinders 265 and 266 and two shouldered annular memberst261 and 268 are interposed the arrangement being as previously described in conjunction with roller I26.

The various cylinders making up the unit are underlying respectively annular members 253 and s 252. In this way, liquid supplied to the various component cylinders of roller 2I8 may beseparately recovered. A trough 211 underlies roller I21 and this trough is partitioned at 218 and 218, the partitions underlying respectively annular member 261 and 268.

Upon reference to Figure 1 it will be noted that cylinders 256 and 266 are provided with I grooves 286 and thatthere are some grooves 28I atthe right hand side of cylinder 25L These. grooves function to distribute liquids over the surface of the cylinders in which they are located, the liquids being supplied from the pipes disposed above the particular cylinder.

In the aftertreatment' of freshly spun viscose, the yarn is led from a source, not shown, over a guide roller 18 and onto cylinders 248 and 263 which can be conveniently employed as a desulphurizing zone. The desulphurizlng liquid has been found to be self-distributing, the treatment is a chemical one, and, for that reason, the surface of cylinders 248 and 263 need not, be grooved. Cylinders 256 and 266 constitute washing zone. Here substantial quantities of water are supplied to the cylinders and are moved from left to right as viewed in Figure 1. Cylinder 265 is used. for the application of a finishing solution to the thread. This solution need not be supplied in large amounts and having a low surface tension, is more or less self-distributing. Consequently, cylinder 265 is not provided with grooves to cause axial movement of the liquid supplied \from pipe 21 I. Since only a small amount of the finishing solution is applied. to the thread, no similar zone on roller I26 is required. However, a portion of cylinder 25I extends over cylinder 265 and the former, near its unsupported end, is provided with a heating unit 283 which is in registry with cylinder 264 of roller I21. This is a, radiant heat unit, fully described in Patent No. 2,244,745. As a result of its use, the surface of cylinder 25I adjacent the unsupported end there- .of is subjected to considerable heat. It is undesirable, however, that the finishing solution be dried before it is applied in an adequate amount.

Consequently, a heat insulated disc 284 serves to divide the interior of cylinder 25I into two portions. Disc 28%, is conveniently held in position b bolting to spider 254. Disc 284 prevents the radiation of heat into the portion of cylinder 25I which is in vertical registry with cylinder 268. The surface of cylinder 25I, however, is of a heat conductive material. Thus,'to prevent the surface conduction of heat along-cylinder 25I beyond disc 284, a cooling zone 285 is interposed. This cooling zone is best viewed in Figures 2 and 3. It can be seen that the thickness of cylinder 25I i reduced at annular zone 285 and that a number of perforations 286 are provided therein. These allow the atmospheric air in the spinning rooms to pass through a portion of the cylinder to cool the same. Grooves 28I, on the surface of cylinder 25I tend to move any finishing solution carried by the thread from cylinder 265 to cylinder 26! to the right of the latter as it is viewed in Figure 1 so that it cannot get onto the heating zone. a

In Figure 4 there is shown a modified type of cylinder to be used in duplicate to form a threadstorage, thread-advancing device. This cylinder is composed of a carbon and graphite composition as distinguished from the normal construction which contemplates a stainless steel surface usually satisfactorily resistant to the various chemicals employed. Except for thickness of material,

due to reduced strength thereof, the structure is similar to the forms previously described. Thus, a roller drive shaft 666 is provided having, at its free end, a threaded area 66I of reduced crosssection. This area, is passed through a central aperture in a steel clamping plate 662 which plate is urged toward the supported end of the roller by a nut 663 acting against a washer 664. Plate 662 rests against an interior annular flange 666 of a cylinder 666, the cylinder being composed entirely of a carbon and graphite composition molded in the shape desired. An annular member 661 i located between cylinder 666 and another cylinder 668, this annular member defining a separation zone by virtue of being provided with exterior annular grooves 666, 6I6, 6| I and 6I2, bridges 6I3 crossing all of the grooves and presenting a rounded interrupted surface lying slightly above the surfaces of cylinders 668 and 666. Annular member 661 is similar to the corresponding members in the steel construction form of the invention previously described, except that it is somewhat thicker, and can withstand the stress brought about by drawing down plate 662. Shoulders 6I4 and 6I5 thereof respectively receive the edges of cylinders 668 and 661. Cylinder 668 is provided with an exterior annular flange H6 and is pressed over a cylindrical por-' tion 6I1 of a steel spider 6I8, having a hub 6I8 modified to allow wet spinning of any other syn-- keyed at 626 to shaft 666. An annular flange 62I may be disposed on hub 6I9 to act as a dam to prevent any accidental movement of corrosive liquids into the drive connections for shaft 666.

Similarly, a cap 622 may be screwed over a boss 623 against a washer 624 to protect the threaded connection between portion 66I of shaft 666 and nut 663.

I wish to emphasize that the process may be thetic thread. Thus it is possible, with adequate changes of the treatment baths, to spin cuprammonium solutions, solutions of cellulose est'ers, polymerized hydrocarbons and derivatives thereof, etc. Modification of the process and the apparatus will readily be foreseen by those skilled in the art, and I desire to include all modifications and variations coming within the scope of the appended claims.

This is a division of my application Serial No. 456,934, filed July 14, 1942, entitled Process and apparatus for the manufacture of synthetic y n A.

I claim:

1=. Apparatus for the aftertreatment of wet spun synthetic thread and the like comprising, 'a driven thread-storage, thread-advancing device comprised of two cylindrical ro1lers,the axes of which lie in intersecting planes, at least one of said rollers being hollow and the surface thereof being provided with a plurality of circumferentially spaced helical grooves disposed in a cylindrical zone, means for heating a portion of the surface of said roller in a cylindrical zone axially spaced from said grooved zone, said roller being perforate and of lesser thickness intermediate said two zones, whereby conduction of heat from the heated zone to the grooved zone is minimized.

' insulating material,

; the heating means and in which that 2. Apparatus as claimed in claim 1, in which the heating means is disposed within the roller in registry with the heated zone thereof, and in which the roller is interlorly subdivided by heat disposed between the heated zone and the grooved zone.

3. Apparatus for the after-treatment of wet K spun synthetic thread and the like comprising a driven thread-storage, thread-advancing device comprised oftwo cylindrical rollers the axes of which lie in intersecting planes, one of said rollers being hollow and a portion of the surface thereof constituting a zone for the liquid treatment of thread, means for heating another portion of the surfacepf said roller axially spaced from said first portion, said roller being perforate and of lesser thickness intermediate said two portions whereby conduction 'of heat from the heated portion to the liquid treatment zone is minimized.

4. Apparatus as claimed in claim 3 in which is disposed within the roller roller is interiorly subdivided by heat insulatingmeans disposed between the liquid treatment zone and the heated the roller.

5. Apparatus for use in the manufacture of thread of synthetic origin comprising a thread supporting and advancing unit consisting of at least two rollers, the axes of which lie in intersecting planes, means for driving at least one of the rollers to cause thread wound around the unit to progress axially thereof in the form of spaced connected coil with all of them,

portion of in the direction or the intersec- 7 tion of the planes, means for supplying treating liquids to spaced points along the surface of one of the rollers of the unit, a plurality of means responsive to rotation of that roller for forming cylindrical liquid bands of controlled axial length therearound, said last-named means lying' in registry with respective points of liquid supply,

means acting on another roller for heating a portion of the surface thereof to dry thread passed therearound, the heated surface lying nearer the point of plane intersection than any of the roller rotation responsive means and out of registry and means for limting the extent of axial conduction of heat along the roller to a zone out of registry with any liquid band, whereby liquid treatment and drying may be accomplished on a single thread supporting and advancing unit in the order named, and without mutual interference;

HERBERT O. NAUMANN.

anraaancas 'crrnn The following references are of record in the file of this patent:

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