Патент USA US2129274код для вставки
Sept. 6, 1938. A. HARTMANN IET‘AL 2,129,274 . PROCESS FOR TREATING ARTIFICIAL FILAMENTS AND APPARATUS THEREFOR Filed June 14, 1934 _, 7 ' 2 Sheets-Sheet 1 . Sept. .6, 1938. ‘ A. HARTMANN ET AL 2,129,274 PROCESS FOR TREATING’ ARTIFICIAL FILAMENTS AND APEARATUS THEREFOR' Filed June 14, 1934 2 Sheets-Sheet 2 2,129,274: Patented Sept.v 6, ‘1938 ' "UNITED STATES PATaNToFFica PROCESS FOR TREATING ARTIFIoIAL FILA MnN'rs AND APPARATUSTHEREFOR August Hartman and Johannes Uy'tenbogaart, Berlin-Lichterfelde, Germany, assignors to ' North American Rayon Corporation, a'corpo ration of Delaware Application . In June Germany 14, 1934, June serial 14,\1‘933, No. 730,662 ' - _6 Claims. The invention comprises a processand appa ratus for wet treatment and drying of arti?cial ?laments ‘or threads in the continuous process for the manufacture of ‘arti?cial silk. .5 ’ There are already known methods according to which freshly spun arti?cial silk ?laments which‘ must undergo a wet treatmentv and a directly following drying, are led inspirals over guiding cylinders whereby they are treated with the necessary liquids for the purpose of de-acidi fying, bleaching, softening, washing, etc. Such guiding cylinders have often been given the form of reels, and the spiral movement of the ?laments over these guiding devices was achieved either 18 through appropriate movements of the individual laths of such a reel, or by means of guiding hooks or intermediate guiding rolls, etc. Finally it has been suggested that groups of cylinders be used in guiding the ?laments, which groups ‘should 20 be made up of two or morgcylinders, slightly sloped toward’each other, and inv this manner to accomplish the spiral movement of the ?lament. It has also already been suggested to treat the . freshly spun arti?cial silk ?lamenton one and 25 the same cylinder, in a ?rst zone with ?uids and“ in a‘second zone on the cylinder to allow a stream of dry air to play on the cylinder, and to take effect on the ?laments. Others have preferred to lead the ?laments which'are to be dried over 30 separate drying cylinders or through air drying , chambers. . . ' It is an object of this invention to provide an improved process and ‘apparatus for the after .treatment of arti?cial silk ?laments, whereby the 35 aftertreatment and drying of the filaments, while they are cylinder achieved It is a 40 to, carry being passed in spirals over a rotating ‘or ‘a pair of rotating cylinders, are in the smallest possible space. further object of the .present invention out the wet treatment of freshly spun arti?cial ?laments or threads in a continuous process while passing them in spirals over a ro-, tating guiding device and to dry the ?laments or threads on a directly following zone of the guid 45 ing device whereby the ‘necessary‘heat for the drying of the ?laments is transferred from the cylinder to the ?laments. ‘ ' ' I It is another object of the "invention to trans fer the heat necessary for the drying of the ?la 50 ments-to the guiding device, or to a part thereof, by‘ causing a highly heated medium to take effect directly upon such portions of the surface of the guiding device with which the windings of the ?laments are not, at the moment of application of the heat, in contact. I ‘ (Cl. 18-8) A still further object of the invention is a device for the wet treatment, and the imme diately following drying, in a continuous process of ?laments or threads which are led in spirals, whereby one or more‘ rotating cylinders are pro-’ vided as guiding and transporting means, these cylinders having, at least in the drying zone, full and fairly smooth outer surfaces, and whereby in the neighborhood of these surfaces a device is located which is adapted to transferring heat to those portions of the surfaces with which‘ the ?laments are ‘not momentarily in contact. ' These and other objects of the present inven- ' tion will ‘become more apparent from a study of the following description and by'reference to the 15 attached drawings in which: Fig. 1 shows a device for wet treatment and drying of arti?cial ?laments in side elevation in partial ‘section; ' I ' , Fig. 2 shows‘ a section of the device according to, Fig. 1 in the direction of the line 2—-2;' Fig. 3 shows a similar section vof a different construction of the device; Fig. 4 shows the device of which Fig. 3 is a sec tion, in side elevation. ' 25 Fig. 5 shows a side elevation of a further con struction; I - i Fig‘. 6 is a vpartial section of the side elevation of a fourth construction-form. The present invention is based on the use of 30 a guiding cylinder or a group of guiding cylin ders, preferably of ,cylinders with a full smooth surface, at least in so far as the drying zone is concerned. Both operations, wet treatment and drying, are achieved on one and the same cylin 35 der or rotating device or, if desirable, one and the same group of cylinders. ; The wet treatment in any appropriate form is . carried out on a ?rst part of the guiding cylinder or group of guiding cylinders, i. e. by means of 40 sprinkling; ‘In spirally passing over the rotat ing device the thread reaches the drying zone and it is an important feature of the invention that in the drying zone a highly heated'medium is applied directly to that partwof the cylinder or 45 the cylinders, with which the arti?cial silk wind ings are not, at the moment of application, in contact, or with which they do not come in con tact at all. The highly heated medium therefor comes directly in contact with the cylinder-walls, but as opposed to the common air-drying does not come directly in contact with the. arti?cial silk. t. ' , Especially a highly temperatured heating gas of a burning device may beused as heating me 2 , r _ _ 2,129,274 dium, which maybe brought .to play directly on‘ Y which is to be heated and for a short space con the cylinder walls. The highly heated medium, form with the surface of the cylinder, while the i. e. highly temperatured burning gas may be rest of the burner may be prevented from giv applied from within the guiding cylinder, as well ing off heat rays by a suitable insulation. _ The single cylinders of a guiding cylinder-pair as from the outside. In the ?rst case it is most purposeful to construct the cylinder or cylinders which are at an angle to‘ one another, maybe ‘at least in the drying zone, out of a' ?reproof, built alike;rthey may have more or less a 'con stant diameter and may be built along the whole _ heat conducting material, such as nickel or Monel-metal or V2A=steel or similar special steels. length out cf the same material. The heat which ?ows from the heated zone to the wet treatment 10 10 In those cases in which the cylinder or cylinders are heated from the outside it‘ is preferable to - use ?reproof materials for the cylinders, which zone may be used in heating the washing water and the like. That part of the cylinder which is are at the same time poor heat conductors, and it-has been found that in these cases clay 'or especially porcelain pipes or rollers are very suit to be used in wet treatment processes may how ever also be made out of a different material than able, which pipes in unglazed porous form \may be easily turned, and which are highly resistant to the temperature and temperature differences, used in this process and are not cut by the’ cellu 20 'lose ?laments. - ‘ that in the-drying zone, without giving up the 15 symmetrical form of the cylinder, or this part oi’ the rotating cylinder may be given a dif?erent‘ construction. It is not important that they single cylinders form a geometrically ideal cylinder. For-special purposes it may also be provided that 20 According to a very practical construction form two nearly parallel cylinders may be used, the the flow of heat from the drying zone to the wet treatment, zone may be hindered, and for axes of which however form a slight angle with one another so that the arti?cial silk thread, dur insulating discs, insulating rings, etc., consisting ing the rotation of the cylinders is passed in 'a for example of mica or the like, between the two. manner known per se in spirals over these cyl inders. The wet treatments are achieved, i. e. by sections of the rotating cylinder. such purposes it has been found practical to put’ / . - The invention makes it possible to simplify' -~sprinkling, on the ?rst part of .these cylinders. ‘the apparatus and process in the continuous The other part of the cylinder pair. is used as a ' method of ‘manufacturing arti?cial silk in a sur 30 drying zone. There, the highly heated medium is . prising manner, and to concentrate it in a small applied directly to the cylinder walls, however space. 80'. The possibility of the use of a high tem--v - only on such portions where the highly heated peratured heating medium, especially in the form ' medium cannot come in direct contact with the of high temperatured burning gases on the cyl arti?cial silk windings, either because the .silk inder surfaces in such a manner that the delicate arti?cial silk threads do not come in direct con 36 35 windings do not pass over the portions at all, or at least do not come in contact with these tact with the burning gases, makes it possible to portions at the moment of application of the dry the arti?cial silk economically in a continual heat. It is sufficient, that one cylinder of the pair, process, and to overcome the previous di?iculties in this respect. In particular in those cases where the arti?cial silk thread is alternately lead away 40 namely the onewhich is to be heated, is made out 40 of ?reproof material which is either a good or poor' heatconductor. Both cylinders, however, maybe out of. ?reproof material at least in the from the drying cylinder and back to it again, the thread undergoes a treatment which might drying zone, and if desired, both may be heated. In case- the cylinders are to be heated in the '45 drying zone from within, it is recommended that they be constructed out of ?reproof materials which are good conductors of heat, such as nickel, “Monel-metal”, “V2A-steel”, etc.; while if it is to be heated from the outside it is preferable, .50 according to experiments, to use ?reproof ma be called an ironing eifect, which makes the twist ing and sizing unnecessary for many uses of terials which are poor conductors of heat. The heating of the cylinders in the drying zone. from the outside may be accomplished by ‘locat ing the heating medium, 1. e. burning gas, in the arti?cial silk, because thereby the capillary ?la 45 ments are pressed‘ together to form an integral threadshaft. In the further treating of arti?cial silk, especially in washing, dyeing, etc., the neces sary opening of the~thread again takes place. Different construction forms which are to be 50 used in the sense of the invention, of suitable de vices are explained with reference to the draw ings below. The device for the treatment of artificial silk according to Figs. 1 and 2 is constructed of two 65 55 form of illuminating gas, water gas, generator gas, in the space between the two cylinders, near ' driven treating cylinders i and 2, to which the one or the other of the two cylinder surfaces with which the arti?cial silk does not come in contact in passing over the cylinders. In this 60 way it is possible toapply the heat, for example, thread is guided from a spinning device which is not shown in the drawings. The thread is guided on these cylinders in spiral windings, which is achieved by the arrangement of the cylinders at of high temperatured burning gases economically an angle to one another. The cylinders are cut directly on the zone of the cylinder which is free of thread windings, and this heat is given up to the arti?cial silk windings during the continual 65 rotation of the cylinders. This heating can, e. g., ~\ be accomplished by locating gas burners with many smallr?ames in a line along the surface, very close to the free zone of the cylinders in the off from the rest of the machine by a plate I I at the lower end in order to protect the machine drying zone. 70 ‘ . I - _ Instead of the common appropriate constant gas burners such devices may be used as are known in the technic of ?ameless burning of ii luminating and power gases. Such burners can' be given a purposeful form, in that their effective 75 surfaces are directed toward the rotating surface from splashing water. Besides that, the water dripping off from the cylinder is led off by this 65 plate. The treatingliquid is applied to the cyl-v inder out of the spray tubes 3, 4. The liquid forms a thin layer around the portions of the cylinder lying below the spray tubes and ?ows' in accordance with the inclination of the cylin 70 der in the opposite direction to the progression of the thread. The upper end of the cylinder is constructed as a drying zone and is heated from the under side by a gas burner 5. The cylinder is practically constructed out of porous porcelain. 75 3 9,180,274 A shield 1 is located at both sides of the gas burner to prevent the gas ?ame from being deviated which a highly heated medium has been applied at a point with which the threads are momen from time to time by air streams. 'The gas flame vcan beregulated by the regulating screw 8 with tarily out of contact. a valve. arti?cial silk comprising, in combination, a pair of spaced rollers, means for driving said rollers, According to the construction form of Figs. 3 and 4 a surface burner is used insteadof a gas ‘ burner, it consisting of a heating plate 8 and a covering 9. In this case one is not forced to 10 locate the heating device on the underside of the cylinder, as is necessary in the case of a gas burner, but the surface burner may be located over the lower cylinder or in any desirable posi tion. In thisway the upper cylinder as well as the lower cylinder may be heated and the two heating devices may be connected by a connect ing pipe I0, and in this case only one gas pipe is needed. The liquid is led to the upper cylin der l6 as well as to the lower cylinder I], 20 through the pipes l3, ll, l5 and 28. In Fig. 5 a device is shown in which only one treating cylinder I8 is provided which is sprinkled with liquid through pipes I9, 20, and which is heated at its upper front end by the The left part is made out of glass; the right part out of porcelain. Between 25 heating device II. both parts is an insulation zone 21 which may consist of a narrow air layer or an intermediate layer of mica or asbestos, etc. ‘ ‘ 2.;A device for use in the manufacture of said rollers disposed at a slight angle one to the other whereby a thread looped around said roll ers will be conveyed from one end to the other, means for spraying with treating liquid one por 10 tion of said rollers, and heating means positioned between said rollers for heating a portion of at least one of the rollers. 3. A device for use in the manufacture of arti?cial silk comprising, in combination, a pair of spaced rotating rollers positioned at an angle one to the other whereby when thread is looped around'said rollers the said thread will be passed _ from one end thereof to the other end, means for spraying with treating liquid one portion of 20 said rollers, and means positioned between saidv rollers adapted to heat the surface of one of said rollers at a point with which the ?laments are not for the moment in contact. 4. A device for use in the manufacture of 25 arti?cial silk comprising, in combination, spaced rotating rollers over which thread alternately passes in- an approximately spiral path, means to spray treating liquid over one portion of said 30 In order that the thread pass in regular spiral rollers and the thread passing thereover, and 30 windings over the cylinder I! from the wet treat means to heat a portion of the outside of at least ment zone .to the drying zone a free running or one of said rollers, with which, at the moment driven roller 2| is provided whose axes forms an of applying heat, the threads are not in contact. angle with the axes of the roller ll. The guid 5. Ina-process for the continuous manufac ing roller may be replaced by guiding hooks or ture of arti?cial ?laments, the steps of passing 35 by a row of little guiding rollers, etc. the ?laments in a helical path over smooth sur Fig. 6 shows still another device, in which the faced rotating guiding surfaces, wet-treating the heat is applied to the drying zone 23, of the cylin ?laments in successive stages as they pass pro der 2!, from within by the heating device 24. In gressively over at least one of said surfaces, and 40 this case the treating-cylinder or at least its dry drying the ?laments in successive stages by pass 40 ing zone must consist, preferably, out of a sub ing them alternately a_ plurality of times over stance which is a good heat conductor. In this a heated portion of at least one of said surfaces construction the thread is guided in a spiral and an unheated portion of-said surfaces, the path by the free running little guiding rollers 25. 45 What we claim is: 1. In a process for the continuous manufacture of arti?cial ?laments the steps of passing the heated portion having applied a highly heated medium at a point with which the threads are 45 momentarily out of contact. ‘ , > 6. In a process for the manufacture of arti? ?laments in a helical path over smooth surfaced cial ?laments. the steps comprising passing rotating guiding surfaces, wet-treating the ?la freshly extruded wet ?laments alternately over heated and unheated surfaces a plurality of times whereby air-ironing effect of the ?laments 50 ments in successive stages as they pass progres sively overat least one of said surfaces, and dry ing the filaments in successive stages by passing is achieved. ‘ them alternately a plurality of times over a heated portion of at least one of said surfaces andtoanunheated‘portionofsaidaurfaeesto' AUGUST HAR'IMANN. JOHANNES U'YTENBOGAART.