DD284703A5 - METHOD AND DEVICE FOR CONTINUOUS MANUFACTURE OF COAT SEED FAIRS - Google Patents

Abstract

The invention relates to a method and apparatus for the continuous production of rayon threads. A series of tubes are stretched in parallel with each other and are spooled out in a spinning unit through a plurality of spinning pumps having many outlets, followed by continuously receiving a cleaning treatment, a drying treatment and a receiving treatment in this order they are guided parallel to each other. Between the primary stretching treatment in the spinning unit and the cleaning treatment, a secondary thread-stretching treatment can be carried out. Units or systems for performing these treatments are spaced apart. The threads can be routed along both sides of a continuous filament production device. Fig. 1 {Kunstseidenfaeden; continuous production; Spinning unit; Spinning pumps; Spinnduesen; Stretching treatment; drying; Recording treatment}

Description

-2- 284 Field of application of the invention

The invention relates to a method and apparatus for the continuous production of rayon yarns by the parallel feeding of a series of filaments which can effectively treat filaments with improved processability through single intermittent machine blocks.

Characteristic of the known state of the art

According to current technology in this technical field, most rayon threads are made by a pot spinning process in which woven rayon threads are taken up in a pot made of resin and are rotated at about 8000 to 10000 rpm by a centrifugal force caused by the rotation of the pot is caused. In this method, the stresses caused at the start and end times of the thread take-up are different. This difference in stresses can lead to irregularities in the strength or color of a product. For this reason, the rayon threads so absorbed are mainly used for lining fabrics of clothing.

To circumvent this problem, many types of continuous spinning machines have been proposed, but these machines are rarely used for the actual production of rayon threads. The following types of continuous spinning machines for rayon threads are generally known: 1. Nelson machine, 2. Oscar-Kohorn machine, 3. Kuljian machine and 4. Industrial artificial silk spinning machine.

1. A Nelson machine is constructed so that two slightly inclined rollers are usually arranged in two parallel planes, and according to the inclination of the rollers, the endless yarn is fed in a spiral manner in the axial directions thereof while the rollers are rotated. During this feeding of the endless yarn, this is subjected to a cleaning, washing and similar treatment.

2. An Oscar-Kohorn machine is similar in construction to the endless yarn feed as the Nelson machine except that the cleaning spool and the drying spool are separated and their rotational speed is adjustable.

3. A Kuljian machine is constructed so that generally eight rollers are disposed slightly inclined as a coil means are assembled and the endless yarn is fed through the respective rollers. In this machine, the tension of the thread can be changed relatively freely by changing the Waizendurchmesser.

4. An in-depth artificial silk spinning machine is constructed so that a bobbin for feeding the continuous yarn functions as two bobbins of the Nelson machine would function, and that a plurality of bobbins for carrying out the respective treatments such as cleaning, washing, drying and the like. is arranged.

In addition, Japanese Patent Publication No. 60-50882 (50882/1985) describes a method for the continuous production of viscose silk filaments. According to this method, the viscose is fed to a coagulation bath of a viscose filter and a spinning tube and then extruded as a viscose yarn through a spinneret. The thus extruded viscose yarn is taken up by a guide around a main roll and a separation roll, so that the yarn proceeds spirally with uniform spacing on the rolls in the axial direction thereof. During yarn feeding on the rolls, the yarn is subjected to a cleaning process including water washing, desulphurization, bleaching and oil scrubbing. The endless yarn thus treated is then dried on the rollers and then passed over a guide to a take-up spool. The continuous yarn is picked up on the take-up spool with proper twisting as a yarn package

 The Nelson yarn spinning machine (1) has the following problems.

(a) The operators are forced to stand on both sides of the machine while carrying out the work, which is difficult for them.

(b) Various kinds of chemical liquids are mixed on the rollers, so that the respective treatments are not effectively performed during the continuous yarn feeding.

(c) The rolls must be partially heated for drying treatment and partially treated with liquids to treat the continuous yarn, so that the surfaces of the rolls are constantly dirty.

(d) It is necessary to select a roll material which will withstand the most corrosive treatment liquid, so that the material is expensive.

In the Oscar-Kohorn machine (2), the above defect (a) is eliminated, and moreover, in this machine, the drying treatment is carried out by another roll. However, this involves a problem that the number of rolls for treating the continuous yarn is increased.

The Kuljian machine (3) and the industrial synthetic silk spinning machine (4) also suffer from the above-described problems encountered with the machines (1) and (2), so that they are hardly used for the actual production of continuous filament yarn.

The common problems encountered in the machines of types (1) to (4) described above are the use of a series of rollers, each of which must have a large diameter, for the time for the chemical treatments and the drying to reduce.

In continuous yarn spinning machines of the conventional types, the yarns are fed at about 100 m / min, and when a yarn having a thickness of about 100 deniers is processed, the production amount per yarn spindle per day is only 1.5 kg of yarn. As a result, it is impossible to economically operate the spinning machines of the high equipment cost type, thus, they are not practical for the production of artificial silk threads for clothes. For this reason, the spinning machines of the types described above are used for the production of tire cords made of an endless yarn having a thickness of about ten times or more the thickness of the above-described clothing thread. Of course, the tire cord is hardly required to be judged on the appearance of its practical use, and no bleaching treatment is required. From these viewpoints and from the standpoint of economy, the conventional yarn spinning machines of the types described above can be estimated to be practically used for the production of tire cord and the like.

In addition, the spinning system proposed in Japanese Patent Publication No. 60-50882 also has the following problems.

(1) Since the yarn feed occurs while the yarn is wound around the roll in the axial direction thereof during the cleaning process, the workability is not good and the various treatment liquids can be mixed, which can reduce the treatment efficiency.

(2) Since the yarn on the rollers progresses continuously through the respective chemical treatment areas, the treatment liquids in the respective treatment areas can be mixed. As a result, the treatment efficiency is adversely affected.

(3) Since the yarn is dried on a portion of the roll, the treatment liquids may be mixed. This also affects the treatment efficacy.

(4) Since the yarn is heated on a portion of the roll, the respective treating liquids can be crystallized and thus adhere to the surface of the roll.

(5) For the rolls, it is necessary to select a material which withstands the highly corrosive treatment liquids, so that the rolls become more expensive to produce.

In the meantime, there has been an increased demand today for high-quality rayon threads in the field of fabric production according to the variety of fashion. The fibers for the production of garments must generally have a fine thickness compared to, for example, the yarn for tire cord, so that the productivity of the fibers for clothing is quite low. Fibers for clothing must also be outwardly beautiful and have a uniform color distribution as a product.

Object of the invention

The object of the invention is to substantially eliminate the defects and disadvantages which occur in the prior art described above.

Explanation of the essence of the invention

The invention has for its object to provide a method and a device, according to which artificial silk threads are produced in parallel to each other continuously and the threads can be effectively treated with improved processability.

According to the invention the object is achieved in that a series of threads are stretched parallel to each other in a spinning device primarily and the threads are then subjected to continuous cleaning, drying and receiving in this order, while they are transported parallel to each other. In a preferred embodiment, a secondary thread-stretching treatment can be carried out between the spinning treatment and the cleaning treatment.

According to another feature of the present invention, there is provided an apparatus for the continuous production of rayon threads, characterized in that it comprises a thread spinning unit for performing a primary stretching treatment comprising a plurality of multi-outlet spinning pumps and a plurality of spinning nozzles corresponding to each Outputs for the parallel stretching of the threads is provided, a cleaning system operatively connected to the spinning unit, a drying unit operatively connected to the cleaning system and a receiving unit operatively connected to the drying unit, wherein the spinning unit, the cleaning system, the drying unit and the receiving unit arranged at intervals with each other are such that a series of filaments subjected to a primary stretching treatment in the spinning unit are guided parallel to each other to the corresponding units.

In a preferred embodiment, a secondary yarn draw unit may be interposed between the spinning unit and the cleaning system at intermediate intervals.

In further preferred embodiments of the invention, the spinning unit may be provided with a pair of godet rolls for performing a primary yarn stretching treatment. The cleaning treatment may be carried out under closed conditions, and also the drying treatment may be carried out under covered conditions. A series of filaments may be fed in parallel on both sides of the filament-making device. According to the invention, a series of threads are discharged parallel to each other from spinnerets through a plurality of spinning pumps having a plurality of spouts in the thread spinning unit for the primary stretching treatment. The yarns are then fed continuously and in parallel from the spinning unit to the yarn take-up unit by a cleaning system and a drying unit with improved processability. The threads are effectively subjected to the appropriate chemical treatments in the cleaning system under closed conditions in a preferred embodiment. A secondary thread stretching treatment can be incorporated between the primary stretching treatment in the spinning unit and the cleaning treatment. The corresponding units are arranged at intervals among themselves as machine blocks for better maintenance of the same and to observe the thread feed.

embodiment

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawings show:

1 is a plan view of an embodiment of a device according to the invention for the continuous production of rayon threads;

2 shows the elevation of the device shown in Figure 1; 3 is an enlarged view of the left half of a spinning unit of the device shown in Figure 1 or 2 along the

Line IH-III of Fig. 2; and Fig. 4: A perspective view of an example of a conventional continuous synthetic silk thread spinning machine.

For a better understanding of the invention, a conventional example of a continuous spinning machine will first be described below with reference to Fig. 4, which generally corresponds to the technique described in Japanese Patent Publication No. 60-50882 (1985).

In FIG. 4, a viscose silk thread is guided through a viscose filter 1 and a spinneret 2 of a spinning tube 1 'as a viscose thread into a coagulation bath 3 and extruded. The thus-extruded viscose yarn is taken up by a guide 4 around a main roll 5 and a separation roll 6 so that the yarn proceeds in a spiral manner at equal intervals on the rolls 5 and 6 in the axial direction thereof. During yarn feeding on the rolls, the yarn is subjected to a cleaning process including water washing, desulphurization, bleaching and oil scrubbing. The reference numerals 8 and 8 'indicate means for supplying the washing water. The treated continuous yarn 7 is then dried on a drying section 9, which is located on the rollers, and then passed through a guide 10 to a take-up reel 11. The continuous yarn is received around the take-up reel 11 with proper twisting as a yarn package.

These and other conventional examples of spinning methods and machines, however, have the problems and disadvantages previously described.

This invention, developed for the purpose of overcoming the problems and disadvantages of the conventional technology, will now be described in detail by means of preferred embodiments represented by FIGS. 1 to 3.

Figures 1 and 2 are basic and elevational views of a spinning machine according to the invention, and Figure 3 is an enlarged sectional view of a spinning unit of the machine shown in Figure 1 or 2.

Referring to Figure 1, for example, an apparatus for the continuous production of rayon yarns according to the present invention comprises a spinning unit 15 having a plurality of spinning pumps 16 each provided with a plurality of outlets - in the illustrated embodiment, two, and a plurality of those shown in FIG 3, corresponding to the respective outlets, a secondary drawing unit 18 operatively connected to the spinning unit 15, a cleaning system 20 connected to the secondary drawing unit 18, a drying unit 21 operatively connected to the cleaning system 20, and one Yarn take-up spool 22. As shown in Figure 2, the cleaning system 20 comprises a water washing unit 23, a desulfurizing unit 24, a water washing unit 25, a bleaching unit 26, a water washing unit 27, an acid washing unit 28, a water washing unit 30 and an oil agent treatment unit 31 described in this Re Order are arranged for the transport of the threads. The drying unit 21 is operatively connected to the latter via a compensator 32 which is operated in synchronization with the thread take-up spool 22.

These machine blocks, d. H. the spinning unit 15, the secondary drafting unit 18, the cleaning system 20, the drying unit 21 and the yarn take-up machine 22 are arranged in operative connection in this order at respective intervals, so that a series of yarns subjected to the primary stretching treatment in the spinning unit 15, transported and handled in parallel.

In Fig. 3, the spinning unit 15 comprises a viscose feed tube 33, and the viscose from the viscose feed tube 33 is drawn through, for example, two spinnerets 17 by the operation of a spinning pump 16, which may be, for example, a dual-outlet double pump, and the viscose thread is interposed between one Pair of lower Godetwalze 34 and upper Godetwalze 35 stretched. Reference numerals 36 and 37 denote a viscose filter and a coagulation bath, respectively.

The thread from the upper Godetwalze 35 is then guided via a guide in a drawing bath 38. The spinning unit 15 is generally provided with, for example, 50 to 100 spinning pumps 16 on one side, and the filament bundles consisting of about 100 to 200 filaments are collected to the drawing bath 38 and then fed to the secondary drawing unit 18. In the spinning unit 15, another 50 to 100 spinning pumps 16 are arranged on the other side. As a result, a total of about 200 to 400 threads are transported in parallel on both sides of the device.

The threads, about 100 to 200 on one side, are fed in parallel from the secondary draw unit 18 to the thread take-up spool 22 via the rollers of the units. The cleaning system 20 comprises the washing units 23, 25, 27 and 30, the desulfurizing unit 24, the bleaching unit 26, the acid washing unit 28 and the oil agent treatment unit 31, which are each provided with throttling rollers to improve the treatment efficiency and to unify the quality of the filaments at the exit portions.

According to the construction of the spinning machine according to the invention, another 100 to 200 threads are transported on the other side of the machine, and the operator can easily operate the machine for treating the threads on both sides thereof. The units of the cleaning system 20, i. the desulfurization unit 24, the bleaching unit 26, the acid washing unit 28 and / or the oil agent treatment unit 31, in which the chemical treatments are performed using liquid chemicals, are completed by attaching a housing 40 to prevent contamination of the operator with chemicals and improve the sanitary environment of the workplace.

A cover 41 may be provided for the drying unit 21, which is removed for efficient and economical drying of the threads.

Since the corresponding units are arranged with suitable spaces, good handling by the operator is possible, for example, to handle thread breakage in the interstices easily.

According to the above-described method and apparatus for the continuous production of rayon threads, a spinner pump provided with a plurality of spouts is used as a spinning pump for treating the rayon threads.

The rayon threads are primarily stretched by a pair of rollers and then cleaned, dried and taken up by parallel thread feed to finally be wound in the winding unit to the respective rollers. The method and apparatus of the type described above can achieve the following advantages and benefits.

The respective units such as the spinning unit, the secondary drawing unit, the cleaning system, the drying unit and the winding unit are arranged as separate machine blocks, so that the liquid chemicals used are hardly mixed and thus the efficiency of the thread treatment can be significantly improved.

The rayon yarns are fed in parallel through the secondary stretching unit to the winding unit, so that the improved processability can be achieved and the yarn production cost can be reduced in this way.

The respective units are arranged separately so that some of the units in which the chemical treatments are performed can be completed by placing them in a housing, thereby improving the sanitary environment around the machine and at the work station.

The attachment of the removable cover for the drying unit can facilitate the efficient and economical drying process.

The provision of a spinning unit provided with a multiplicity of thread outlets reduces the production costs for the rayon threads.

The arrangement of the respective machine blocks with gaps allows easy handling or operation of the corresponding units by the operator.

It should be noted that this invention is not limited to the described embodiments and that many other changes and modifications can be made in particular with regard to the arrangement of the respective machine blocks and the number of rollers.

Claims (16)

A process for the continuous production of rayon yarns, characterized in that a series of yarns are stretched in parallel in a spinning unit and the yarns are thereafter continuously subjected to a cleaning treatment, a drying treatment and a pick-up treatment in this order while being transported in parallel. 2. The method according to claim 1, characterized in that the threads are subjected to a secondary stretching treatment between the spinning treatment and the cleaning treatment. A method according to claim 1, characterized in that the cleaning treatment includes a water washing process, a desulphurization process, an acid washing process and an oil treatment process. 4. The method according to claim 3, characterized in that the cleaning treatment further includes a bleaching process. 5. The method according to claim 1, characterized in that the cleaning treatment is carried out under closed conditions. 6. The method according to claim 1, characterized in that the drying treatment is carried out under covered conditions. 7. The method according to claim 1, characterized in that about 100 to 300 threads are guided along at least one side of the units for performing the corresponding treatments. An apparatus for the continuous production of rayon yarns, characterized by comprising a yarn spinning unit (15) for performing a primary stretching treatment provided with a plurality of spinning pumps (16) having a plurality of outlets and a plurality of spinning nozzles (17) corresponding to the outlets a cleaning system (20) operatively connected to the spinning unit (15), a drying unit (21) operatively connected to the cleaning system (20) and a receiving unit (22) operatively connected to the drying unit (21), the spinning unit (15) , the cleaning system (20), the drying unit (21) and the receiving unit (22) are spaced apart such that a series of yarns subjected to a primary stretching treatment in the spinning unit (15) are parallel to the respective units be guided. 9. Device according to claim 8, characterized in that in addition a secondary stretching unit (18) is arranged at intervals between the spinning unit (15) and the cleaning system (20). 10. Device according to claim 8, characterized in that the cleaning system (20) water washing units (23, 25, 27, 30), a desulfurization unit (24), an acid washing unit (28) and an oil agent treatment unit (31). 11. A device according to claim 10, characterized in that the cleaning system further includes a bleaching unit (26). 12. Device according to claim 8, characterized in that the cleaning system (20) by a housing (40) is completed. 13. Device according to claim 8, characterized in that the drying unit (21) is covered with a removable cover (41). 14. A device according to claim 8, characterized in that the spinning unit (15) for carrying out the primary yarn stretching treatment includes a pair of rollers consisting of lower and upper Godetwalze (34, 35). 15. A device according to claim 8, characterized in that at an upper portion of the spinning unit (15) a stretching bath (38) is arranged for carrying out a yarn stretching treatment. 16. A device according to claim 8, characterized in that about 100 to 300 threads are guided in parallel along at least one side of the device. For this 3 pages drawings