Thread manufacturing equipment

Abstract

The invention relates to a yarn production installation with at least one working unit, which comprises a melt spinning device with a number of melt nozzles arranged in the longitudinal direction of a nozzle row, one after the other on a processing path, a yarn entry section, a running-in godet pair located at the end of the yarn entry section, a yarn drawing device with at least two high-temperature godet pairs arranged on a drawing frame of the yarn production installation, and at least one winding package, in which the free godet end of the first high-temperature godet pair on the processing path of the yarn drawing device protrudes into the same first half space as the free godet end of the running-in godet pair. The rotation axis of the first godet of the running-in godet pair on the processing path is oriented at an angle of 0° to 45° to the longitudinal direction of the nozzle row. According to the present invention, in this yarn manufacturing equipment, a heated relaxation godet pair is arranged on a relaxation frame arranged downstream of the drawing area frame on the processing path, a passage is formed between the drawing area frame and the relaxation frame, and the free ends of the relaxation godet pair protrude into a second space half located opposite the first space half.

Description

Technical Field

[0001] The present invention relates to a yarn manufacturing facility having at least one working unit, the working unit including a melt spinning device having a plurality of melt nozzles arranged in the longitudinal direction of a nozzle row successively on a processing path, a yarn inlet section, an inlet godet pair located at an end of this yarn inlet section, a yarn stretching device having at least two high-temperature godet pairs arranged on a stretching area frame of the yarn manufacturing facility, and at least one winding package. The free godet end of the first high-temperature godet pair of the yarn stretching device on the processing path projects into the same first spatial half as the free godet end of the inlet godet pair, and the rotational axis of the first godet of the inlet godet pair on the processing path is arranged at an angle of 0° to 45° with respect to the longitudinal direction of the nozzle row.

[0002] A yarn manufacturing facility for manufacturing synthetic yarns based on a melt spinning process has a melt spinning device including an extruder and a spinning head, and the spinning head itself has a plurality of melt nozzles arranged in a nozzle row. High-temperature plastic filaments are extruded from the melt nozzles respectively.

[0003] The filaments formed by the melt nozzles typically pass through a dropping vertical hole and a filament processing section during their fall, and in this filament processing section, the filaments are gathered, for example, by applying an oil agent to form yarns. Then, the individual yarns enter the yarn inlet section, and in this yarn inlet section, the individual yarns are gathered to form a strip-shaped yarn group, and the width direction of this yarn group initially coincides with the longitudinal direction of the nozzle row. The yarn inlet section is typically formed by a vertical machine wall hereinafter referred to as the inlet section wall, and in front of this machine wall, the yarns travel along until they ride onto an inlet godet pair located at the lower end of the yarn inlet section.

[0004] By means of the feed godet pair, a preload is applied to the yarn. Additionally, by means of the feed godet pair, the separation of the yarn stretching and the melt spinning process from the yarn winding in the yarn manufacturing facility is carried out later.

[0005] The yarn stretching device following the feed godet pair on the processing path typically has a plurality of heated godet pairs. The godets respectively protruding from the holding wall of the yarn manufacturing facility are mostly driven by an electric motor. Using these godet pairs, the yarn is drawn out and stretched. Yarn stretching devices known based on the prior art often have the uppermost godet pair that is not heated so strongly in order to relax the yarn.

[0006] After the yarn has passed through the yarn stretching device, the yarn is wound onto at least one winding package.

[0007] The yarn passes through most of the yarn manufacturing facility as a flat band of yarn. This band of yarn is guided through the godets of the yarn manufacturing facility. Only after leaving the godets, the yarns are individually wound onto their respective winding packages.

[0008] Therefore, in addition to the cylindrical godet peripheral wall, in order to guide, deflect, and support the band of yarn in the yarn manufacturing facility, another cylindrical object such as a roller and a rod is required.

[0009] As is known, for example, from German Patent Application Publication No. 19909073, the band of yarn is guided along the peripheral surface of the godet peripheral wall of the godet pair for stretching, and the godet pair is wound around by the band of yarn a plurality of times. When the band of yarn circulates around the godet pair a plurality of times in this way, the yarn is heated by the heated godet. Then the band of yarn reaches the next godet pair having a higher circulation speed. The higher circulation speed forms the yarn tension required for stretching. Therefore, the region between such two godet pairs arranged one after another on the processing path forms a stretching zone where the yarns of the band of yarn are stretched.

[0010] Depending on the thread properties to be achieved, multiple stretching zones are often provided between heated godet pairs that are arranged successively on the processing path, and in these stretching zones the thread is stretched step by step. Therefore, it is also perfectly possible to use three or more high-temperature godet pairs to stretch the thread during thread production.

[0011] Normally, high-temperature godet pairs that are heated differently from each other are located within a heat-insulating housing, and this housing has at least one slit through which a thread group can enter the godet peripheral wall and another slit through which the thread group can exit again.

[0012] Thread production equipment operating according to the melt spinning process often has a plurality of working units, and each of these working units has a melt spinning device, a thread inlet section arranged downstream of the melt spinning device, a thread stretching device arranged downstream of the thread inlet section, and a winding device arranged downstream of the thread stretching device.

[0013] An apparatus for manufacturing a thread in the form described at the beginning is known, for example, from German Patent Application Publication No. 102010015215. In this apparatus, for each spinning unit, a drawing device equipped with a plurality of driven godets and a winding device equipped with a plurality of winding units are provided, and the drawing device and the winding device together form one working unit. Adjacent working units can be driven independently of each other and each has one own power supply unit. Furthermore, the drawing device and the winding device are configured to be interchangeable independently of each other. Thereby, it is desirable to ensure a quick and reliable start of operation of the drawing device and the winding device of an individual working unit.

[0014] In the case of thread breakage, thread production in the corresponding working unit must be interrupted. Then the task of the operator is to newly guide the thread in the processing direction through or via the individual components of the entire thread production equipment, after which thread production can be started again.

[0015] During each start-up operation or after fault removal, and also during restart operation after maintenance and cleaning of the godet peripheral wall or after replacement, it is necessary for the operator to guide the thread through the entire yarn manufacturing facility, after which yarn production can be started again.

[0016] Therefore, efforts have been made to improve the accessibility and replaceability of individual components of the working units of the yarn manufacturing facility, for example, to facilitate maintenance work and / or cleaning work, or however, to increase the flexibility of the yarn manufacturing facility.

[0017] German Patent Application Publication No. 102014017620 discloses an apparatus for drawing and stretching synthetic yarns, comprising a plurality of godet units held on a frame wall. In order to facilitate the cleaning of the godet peripheral wall when the godets are arranged as compactly as possible, at least one godet peripheral wall provided on the frame wall is axially movable so that this godet peripheral wall can be shifted to a maintenance position protruding with respect to the adjacent godet peripheral walls.

[0018] Based on German Patent Application Publication No. 102017011183, an apparatus for drawing, stretching, and winding up a synthetic yarn group, comprising a plurality of godets arranged on a godet wall, is known. The godet wall is replaceably held within a vertical opening of a machine frame, whereby the entire assembly of the plurality of godets can be replaced at once.

[0019] German Patent Application Publication No. 102018001274 discloses a drawing device in a melt spinning process for guiding a yarn group. The godet of the drawing device is formed as an insertion unit and can be held on a holding wall within an insertion connection part.

[0020] Based on German Patent Application Publication No. 102004039510, an apparatus for forming a plurality of synthetic filaments by melt spinning, drawing, treating, and winding them is known. One example of this apparatus has a spinneret device with eight spinnerets arranged side by side on a spinning beam. A cooling device with cooling longitudinal holes is correspondingly arranged on the spinnerets. Below this cooling device, an oiling agent supply unit is located. In the oiling agent supply thread guide of this oiling agent supply device, the filament groups extruded from the spinnerets are guided together to form one thread each. Below the oiling agent supply device, two drawing mechanisms are arranged, each having one godet and a freely rotatable idler roller. The oiling agent supply device is connected in the processing direction to a stretching area with two stretching godet duos. After stretching, the threads are wound up by a winding unit respectively to form packages.

[0021] German Patent Application Publication No. 10120551 describes an apparatus for forming and winding synthetic filaments by melt spinning. The apparatus has a machine frame on which a spinning device is arranged. The spinning device has a spinning head and a spinneret arranged below this spinning head. The filament bundle formed by the spinneret passes through a cooling device and is then gathered by an oiling agent supply unit to form one thread. Below the spinning device, a conveying mechanism is arranged, which is formed as a godet unit having a driven godet and an undriven idler roller. In one embodiment, the conveying mechanism is followed by a plurality of processing modules arranged in a module housing device. Each processing module includes one godet duo. After the processing module, the thread rides onto another conveying mechanism, which is arranged diagonally to the first conveying mechanism. The other conveying mechanism consists of a heated godet and an unheated godet, both of which are driven. This other conveying mechanism allows relaxation for shrinkage treatment of the thread before winding by the winding device.

[0022] German Patent Application Publication No. 102015016800 also discloses an apparatus for forming, drawing, stretching, relaxing, and winding a synthetic yarn. This apparatus includes a spinning device having four spinning nozzles. These spinning nozzles are arranged on a spinning beam. The filaments extruded from each spinning nozzle pass through a cooling vertical hole and are then bundled in a collecting yarn guide to form a single yarn. The yarn is then spaced at a predetermined interval by a comb yarn guide. At this interval, the yarn continues to ride onto the first drawing godet duo of the drawing unit. The first drawing godet duo has two drawing godets. This drawing device also has a second drawing godet duo with two drawing godets. From the last drawing godet, the yarn rides onto the first stretching godet, and following this first stretching godet are another pair of stretching godets arranged one above the other. The stretching godets are heated and are arranged in a heating box. The stretching godets are simply wound around by the yarn only once. Following the last stretching godet in the processing direction is a heated relaxation godet duo with two similarly heated relaxation godets. The apparatus further has a winding device. The winding device winds the yarns respectively to form packages. The axis of rotation of the first drawing godet duo of the drawing device is oriented in the longitudinal direction of the nozzle row having four spinning nozzles.

[0023] Often, especially for carrying out equipment cleaning or maintenance, improving accessibility to individual components of a yarn manufacturing facility can only succeed at the expense of the compact structure of the entire facility. In current yarn manufacturing facilities, typically, the yarn stretching unit is arranged laterally next to the yarn inlet section so that the front of the inlet section where the yarn runs downward in the direction of the godet pair faces the same spatial direction half as the free godet end of the godet of the yarn stretching device. Thus, in current yarn manufacturing devices, it is necessary to rotate the width direction of the yarn group at the end of the yarn inlet section by 90° so that the yarn group can ride onto the godet of the adjacent yarn stretching device from the yarn inlet section. This is done, for example, by a pair of inlet godets protruding vertically from the yarn inlet section. Such an adjacent arrangement of the yarn inlet section and the yarn stretching device results in an extremely wide facility in which the operator can reach all components guiding the yarn only from one side. The large height and width dimensions make operation and work in this facility difficult.

[0024] Accordingly, an object of the present invention is to improve a compact yarn manufacturing facility of the type described at the beginning and to improve accessibility for yarn replacement and for cleaning and maintenance of the yarn manufacturing facility.

[0025] According to the present invention, this problem is solved by a yarn manufacturing facility comprising at least one working unit, the working unit comprising, in succession on a processing path, a melt spinning device having a plurality of melt nozzles arranged in the longitudinal direction of a nozzle row, a yarn inlet section, an inlet godet pair located at the end of this yarn inlet section, a yarn stretching device having at least two high-temperature godet pairs arranged on a stretching frame of the yarn manufacturing facility, and at least one winding package, wherein a free godet end of a first high-temperature godet pair of the yarn stretching device on the processing path projects into the same first spatial half as a free godet end of the inlet godet pair, and in a yarn manufacturing facility in which a rotation axis of a first godet of the inlet godet pair in the processing path is oriented at an angle of 0° to 45° with respect to the longitudinal direction of the nozzle row, a heated relaxation godet pair is arranged on a relaxation frame arranged downstream of the stretching region frame on the processing path, a passage is formed between the stretching region frame and the relaxation frame, and free ends of the relaxation godet pair project into a second spatial half located on the side opposite to the first spatial half.

[0026] Due to the advantageous arrangement and orientation of the inlet godet pair, the accessibility for yarn change is improved while maintaining a compact structural form of the entire working unit.

[0027] In the present invention, a yarn bundle rides onto the inlet godet pair without being twisted by more than 45° in its width direction. Particularly preferably, the yarn bundle formed by the melt nozzles is not twisted at all when riding onto the first godet of the inlet godet pair. Thus, an operator facing the yarn inlet section can also monitor the melt-spun yarn running downward and the winding of the yarn around the godets of the inlet godet pair, and can guide the yarn through the inlet godet pair without the need for the operator to change direction or move away from that position. Furthermore, the operator can satisfactorily check whether the yarn bundle is riding onto the inlet godet pair as specified, for example, without vibration.

[0028] The yarn group formed by the melt nozzles arranged in the longitudinal direction of the nozzle row can be received by an operator, for example, by a suction gun, and can be guided around the godets of the godet pair located at the end of the yarn entry section. The axis of rotation of the first godet of the godet pair on the processing path is oriented substantially parallel to the longitudinal direction of the nozzle row in which the melt nozzles are arranged side by side, that is, at an angle of 0° to 45°. Thereby, the yarn group extruded from the melt nozzle can be rotated by a maximum of 45° during the first winding onto the godet pair. Preferably, the axis of rotation of the first godet of the godet pair is oriented at an angle of less than 30° with respect to the longitudinal direction of the nozzle row, or parallel to the longitudinal direction of the nozzle row, so that the yarn group can be rotated by less than 30°, or particularly preferably not rotated at all.

[0029] Following the godet pair on the processing path, the yarn group is wound around at least two high-temperature godet pairs arranged in the stretching area frame of the working unit. In this case, the free godet end of the first high-temperature godet pair on the processing path of the yarn stretching device projects into the same spatial half as the free godet end of the godet pair. Therefore, the yarn group enters the yarn stretching device of the yarn manufacturing facility. In this case, after extrusion from the melt nozzle, the yarn group cannot be rotated by more than a total of 45° in its width direction. Preferably, the yarn group can be rotated by less than 30° when entering the yarn stretching device, or particularly preferably not rotated at all.

[0030] To facilitate yarn guiding and / or yarn changing, it is advantageous that the yarn group extruded from the melt nozzle is rotated as little as possible or not at all in its width direction during processing in a compact and easily accessible yarn manufacturing facility.

[0031] In the present invention, this is achieved by arranging a heated relaxation godet pair on a relaxation frame disposed on the downstream side of the stretching region frame in the processing path, forming a passage between the stretching region frame and the relaxation frame, and protruding the free ends of the relaxation godet pair into a second space half located on the side opposite to the first space half.

[0032] The yarn stretching device has an additional heated relaxation godet pair. This relaxation godet pair is not arranged on the stretching region frame, but on a separate relaxation frame disposed on the downstream side of the stretching region frame in the processing path.

[0033] There is a passage between the relaxation frame and the stretching region frame. An operator can stand in this passage, turn around, and walk along this passage. From this passage, the operator has access to both the stretching region frame and the relaxation frame. Therefore, from this passage, the yarn exchange in each godet pair of the stretching region frame and the relaxation frame can be particularly advantageously performed by the operator.

[0034] After the operator wraps the yarn group around the incoming godet pair at the end of the yarn incoming section, the operator can guide the yarn group around at least two high-temperature godet pairs of the stretching region frame according to the columns. These high-temperature godet pairs directly follow the incoming godet pair in the processing path. The passage between the stretching region frame and the relaxation frame leaves sufficient free space so that the operator can comfortably and reliably guide the yarn group along the processing path.

[0035] From the last high-temperature godet pair of the stretching region frame, the yarn group can be guided across the passage to the relaxation godet pair.

[0036] The free ends of the relaxation godet pair protrude into the second space half opposite to the first space half, so that the free ends of the relaxation godet pair are directly accessible to the operator from the passage. Therefore, the relaxation godet pair can be comfortably and reliably wound around by the yarn group from the passage.

[0037] Since the relaxation godet pair is mounted on a separate relaxation frame, a lower structural height is created for the relaxation frame and the stretching area frame respectively than when all godet pairs are provided on the same frame. This additionally improves the accessibility and operability to the hot godet pair and the relaxation godet pair.

[0038] Furthermore, maintenance work, cleaning work and repair work on the hot godet pair or the relaxation godet pair can be carried out safely and comfortably from the passage between the stretching area frame and the relaxation frame.

[0039] Since the free godet ends of the heated relaxation godet pair protrude into the second space half oriented in the opposite direction to the first space half, the stretching area frame and the relaxation frame are arranged in the working unit in an overall compact arrangement.

[0040] In addition to the relaxation godet pair, another device for processing yarns, such as at least one additional godet, roller, knotting nozzle, etc., may be arranged on the relaxation frame, whereby another treatment of the yarn can be carried out on the relaxation frame.

[0041] The yarn group extends further from the relaxation frame to at least one winding package, and the yarn is wound on this winding package to form a package.

[0042] Furthermore, it has been found advantageous that at least two hot godet pairs of the hot godet pair, which are arranged directly one after the other on the processing path, are arranged such that their respective free godet ends protrude into space halves opposite to each other.

[0043] Of the high-temperature godet pairs, the free godet ends of at least two high-temperature godet pairs arranged directly one after another on the processing path project into the space half on the opposite side, that is, into the space direction regions opposite to each other. By this, these at least two high-temperature godet pairs are attached to a common stretching region frame in a very compact but very well-accessible manner. The stretching region frame itself is preferably accessible from both sides to which the high-temperature godet pairs are respectively attached.

[0044] This special arrangement is particularly advantageous both for yarn exchange in the high-temperature godet pairs and for cleaning and maintenance operations.

[0045] Conventionally, in order to arrange high-temperature godet pairs that are consecutive one after another on the processing path, a shift occurs between the mounting planes, that is, between the vertical planes in which each high-temperature godet pair is attached to the holding wall. This is due to the fact that the yarn inlet region onto the high-temperature godet pair is located near the driving end of the godet peripheral wall, that is, near the holding wall. Due to the circulation of each yarn around the guide peripheral wall of the godet pair, the yarn group further travels in the direction of the free godet end, and this godet end is directed away from the holding wall. For a straight yarn guide when delivering the yarn group to the next godet pair, the yarn inlet region of the next godet pair must be arranged exactly above the yarn outlet region of the previously circulated godet pair. This has conventionally been possible only by horizontally shifting the mounting plane of the next godet pair relative to the mounting plane of the previously circulated godet pair. The magnitude of the shift is defined by the number of winding turns of the previously circulated godet pair and the width of the yarn group. Therefore, when there are a plurality of yarns and multiple windings of the godet pair with such a yarn group, a relatively large structural length occurs for the godets protruding from the holding wall. This structural length requires a correspondingly large horizontal shift between the mounting planes of the godet pairs passed through by the yarn group one after another.

[0046] In another particularly advantageous embodiment of the present invention, this problem is solved by arranging all of the high-temperature godet pairs arranged in the stretching region frame such that the free godet ends of each of the high-temperature godet pairs that are directly adjacent to each other in the processing path project into spatially opposite half-spaces in opposite directions from each other.

[0047] It has been found that this is advantageous when it is desirable to arrange more than two high-temperature godet pairs in the stretching region frame.

[0048] For example, when three high-temperature godet pairs are arranged in the stretching region frame, the first high-temperature godet pair in the processing path projects into the same first half-space as the godet pair at the end of the yarn inlet section. Similarly, the second high-temperature godet pair in the processing path, which is also arranged in the stretching region frame, projects into the second half-space located on the opposite side of the first half-space. Thus, the yarn group can run vertically from the free godet end of the first high-temperature godet pair and can ride vertically again onto the godet peripheral wall of the first godet of the second high-temperature godet pair near the retaining wall of the second high-temperature godet pair. The third high-temperature godet pair in the processing path again projects into the same first half-space as the godet pair at the inlet and the first high-temperature godet pair provided in the stretching region frame.

[0049] In this advantageous arrangement, another high-temperature godet pair is attached to the stretching region frame in the stretching region frame with an alternating orientation of the respective free godet ends, in a particularly compact and readily accessible manner.

[0050] In another equally advantageous embodiment of the invention, the plurality of godet pairs below the upper godet pair provided in the draw zone frame are, as described above, oriented with their respective free godet ends in alternating directions with respect to each other, and only in the uppermost godet pair of the draw zone frame do their free godet ends project into the same spatial half as the free godet ends of the godet pair arranged below this uppermost godet pair. The uppermost godet pair projects into the same spatial half each time by at least half of the godet wall length of one of its godets beyond the free godet ends of the godet pair arranged below this uppermost godet pair.

[0051] In this embodiment of the invention, the draw zone frame is extended by only the uppermost godet pair, and the free godet ends of this godet pair project into the same spatial half as the godet pair arranged below it. Any uppermost godet pair arranged in this way improves the flexibility of the yarn manufacturing facility so as to enable the production of various different yarns in the working unit of the yarn manufacturing facility without the need to carry out a changeover in the working unit.

[0052] The uppermost godet pair can optionally be used in yarn production by being wound during the threading of the yarn group. If the uppermost godet pair is not required during the production of a particular yarn type, this godet pair can be excluded during the threading of the yarn group. Based on the arrangement of the uppermost godet pair with respect to the godet pair located below it, the yarn guide is not impaired when the uppermost godet pair remains free during the threading of the yarn group.

[0053] As a result, also in this embodiment of the invention, the number of godet pairs in the yarn drawing unit can optionally be increased or decreased by only one by the threading of the yarn group alone. In this regard, the changeover of the individual components of the yarn manufacturing facility is not required in this embodiment.

[0054] It has been found to be particularly advantageous if the thread feed godet pair is attached to a drive module which is arranged on the lower side and at least partially in front of the thread feed section.

[0055] This arrangement of the thread feed godet pair enables the thread group to descend downward, preferably vertically, in the thread feed section and then to be led around the godet peripheral wall of the first godet in the processing path of the thread feed godet pair without being twisted. Thus, the thread group is pulled through the thread feed section by the first godet of the thread feed godet pair in the vertical direction and without being twisted.

[0056] Hereinafter, particularly preferred embodiments, configurations, functions and advantages of the present invention will be described in detail with reference to the drawings.

Brief Description of the Drawings

[0057]

Figure 1

Figure 2

Figure 3

Figure 4

[0058] In all the drawings, the illustrated embodiments or details of the present invention are not necessarily shown to scale.

[0059] Figure 1 shows one embodiment of the yarn manufacturing apparatus 1 according to the present invention, which includes two working units 2 arranged side by side. Each of the working units 2 has a melt spinning apparatus 3, a yarn inlet section 4 following the melt spinning apparatus 3, an inlet godet pair 5 located at the end of the yarn inlet section 4, a yarn stretching apparatus 6 arranged downstream of the inlet godet pair 5 on the processing path of the yarn manufacturing facility 1, and a winding package 7.

[0060] Embodiments of the yarn manufacturing apparatus 1 according to the present invention that include more than two working units 2 or only a single working unit 2, which are not shown in Figure 1, are also easily possible.

[0061] The melt spinning apparatus 3 is significantly simplified and incompletely illustrated in Figure 1 as well as in the remaining Figures 2 to 4 for the sake of clarity. In particular, the extruder and the filling device are omitted from the drawings. The melt nozzles 32 of each melt spinning apparatus 3 are respectively arranged in the longitudinal direction L of the nozzle row 31.

[0062] To further explain the embodiment of the present invention illustrated in the drawings, it is reasonable to simply observe a single working unit 2 of the yarn manufacturing facility 1.

[0063] Figures 2 to 4 respectively show an individual working unit 2 of the yarn manufacturing apparatus 1 according to the present invention shown in Figure 1 in a front view (Figure 2), a side view (Figure 3), and a plan view (Figure 4).

[0064] The filaments emerging from the melt nozzles 32 are cooled during their fall and gathered by a device (not shown in the drawings) of the yarn manufacturing apparatus 1 to form a plurality of yarns. These yarns fall as a yarn group side by side into the yarn inlet section 4 of the yarn manufacturing apparatus 1 and are drawn downward by the inlet godet pair 5 located at the lower end of this yarn inlet section 4. The yarn inlet section 4 extends along a vertical inlet section wall arranged below the melt spinning apparatus 3 of the yarn manufacturing facility 1.

[0065] The thread feed godet pair 5 is attached to the drive module 10, which is located below the thread feed section 4 and at least partially protrudes laterally from the retaining wall along which the thread feed section 4 extends. The axis of rotation of the first godet 51 of the thread feed godet pair 5 in the processing path is oriented parallel to the longitudinal direction L of the nozzle row 31.

[0066] Thus, as can be seen in FIG. 2, the thread group can be easily guided by an operator standing in front of the thread feed section 4 around the first godet 51 of the thread feed godet pair 5 in the processing path, in which case there is no need to twist the thread group around the processing direction.

[0067] Next, as can be seen in FIG. 3, the thread group is guided by the operator around the high-temperature godet pairs 61, 62, 63, 64 which are mounted one above the other on the stretching area frame 60 of the thread stretching device 6. The operator can reach from the thread feed godet pair 5 provided at the end of the thread feed section 4 via the passage 9 to the first high-temperature godet pair 61 in the processing path.

[0068] The high-temperature godet pairs 61, 62, 63, 64 are located in a heat-insulated housing provided with slits 601, through which the thread group can ride onto and run out from each of the high-temperature godet pairs 61, 62, 63, 64. The heat-insulated housing is shown in an open state in all the drawings.

[0069] The free godet end 611 of the first high-temperature godet pair 61 in the processing path protrudes into the same first space half R1 as the free godet end 511 of the thread feed godet pair 5. Thus, the thread group can be very advantageously guided by the operator from the thread feed godet pair 5 around the first high-temperature godet pair 61 of the thread stretching device 6.

[0070] A second pair of high-temperature godets 62 is located above the first pair of high-temperature godets 61 on the processing path. The free godet ends of this second pair of high-temperature godets 62 protrude into the second half space R2, which is located opposite the first half space R1. Therefore, the second pair of high-temperature godets 62 cannot even be seen in Figure 3. Only the back surface of the godet retaining wall, to which the drive ends of the godets of the second pair of high-temperature godets 62 are attached, is visible.

[0071] To guide the yarn group around the second high-temperature godet pair 62 after winding it onto the first high-temperature godet pair 61, the yarn group is guided through slit 601 from the insulated housing of the first high-temperature godet pair 61 into the insulated housing of the second high-temperature godet pair 62. An operator can walk around the draw zone frame 60 and then guide the yarn group around the second high-temperature godet pair 62. The yarn group can then be wound from the second high-temperature godet pair 62 and in a similar manner around the third high-temperature godet pair 63 above the second high-temperature godet pair 62.

[0072] In the embodiment shown, the first three high-temperature godet pairs 61, 62, 63 on the processing path arranged on the extension area frame 60 are each arranged so that the free godet ends 611, 631 of the high-temperature godet pairs 61, 62, 63 arranged directly adjacent to each other on the processing path protrude into opposite half spaces R1, R2.

[0073] In the illustrated, merely exemplary, embodiment of the yarn production installation 1, the drawing zone frame 60 has an uppermost high-temperature godet pair 64. This uppermost high-temperature godet pair 64 projects into the same half space R1 as the free godet ends 631 of the high-temperature godet pair 63 arranged below it.

[0074] The operator can directly transfer the yarn group from the third high-temperature godet pair 63 to the heated relaxation godet pair 8 arranged in a separate relaxation frame 80, or first further wind it around the uppermost high-temperature godet pair 64 of the stretching region frame 60. By simply feeding the yarn group in this way, the number of high-temperature godet pairs 61, 62, 63, 64 used for stretching the yarn can be increased by one or decreased by one. Therefore, various different types of yarns can be manufactured in one and the same working unit 2 of the yarn manufacturing facility 1 according to the present invention without the need to reconfigure this yarn manufacturing facility 1. That is, the uppermost high-temperature godet pair 64 can be arbitrarily considered during yarn manufacturing.

[0075] The uppermost high-temperature godet pair 64 projects into the same spatial half R1, respectively, by at least half of the godet wall length of one of the godets beyond the free godet end 631 of the high-temperature godet pair 63 arranged below the uppermost high-temperature godet. As a result, after the yarn group runs out from the free godet end 631 of the third godet pair 63, it can ride onto the uppermost high-temperature godet pair 64 near the driving end of any uppermost high-temperature godet pair 64.

[0076] Following the high-temperature godet pairs 61, 62, 63, 64 of the stretching region frame 60 on the processing path, the yarn group runs through the heated relaxation godet pair 8 attached to a separate relaxation frame 80 in the embodiment of the present invention shown in FIGS. 1 to 4.

[0077] The free end 81 of the relaxation godet pair 8 projects into the second spatial half R2 located on the opposite side of the first spatial half R1. That is, the free end 81 of the relaxation godet pair 8 and the free end 51 of the incoming godet pair 5 project into opposite spatial direction regions, and thus can be easily reached by the operator through the passage 9 formed between the relaxation frame 80 and the stretching region frame 60. The operator can guide the yarn group from both the third high-temperature godet pair 63 and the uppermost high-temperature godet pair 64 over the passage 9 to the relaxation godet pair 8.

[0078] The horizontal and vertical displacements between the thread outlet of the third high-temperature godet pair 63 and the thread outlet of the uppermost high-temperature godet pair 64 do not cause a significant difference for the thread climbing onto the relaxation godet pair 8. This is because the entry angle is substantially the same in both cases due to a sufficiently large gap based on the passage 9 between the relaxation frame 80 and the stretching region frame 60.

[0079] Below the relaxation frame 80, in the illustrated embodiment, two winding packages 7 are positioned. The thread group is individualized into individual threads after passing through the relaxation godet pair 8, and these threads are wound onto the winding packages 7.

[0080] As a result, the embodiments shown in FIGS. 1 to 4 constitute a compact and easily accessible yarn manufacturing facility 1 for yarn replacement. In this yarn manufacturing facility 1, except for a slight twist due to the required inclined arrangement of the individual godets within one godet pair, the thread group is never twisted in its width direction either during yarn replacement or during the yarn stretching process.

Claims

1. A yarn manufacturing facility (1) comprising at least one working unit (2), wherein the working unit (2) comprises a melt spinning device (3) having a plurality of melt nozzles (32) arranged in the longitudinal direction (L) of a nozzle row (31) successively along a processing path, a yarn inlet section (4), an inlet godet pair (5) located at an end of the yarn inlet section (4), a yarn stretching device (6) having at least two high-temperature godet pairs (61, 62) arranged on a stretching region frame (60) of the yarn manufacturing facility (1), and at least one winding package (7), and has, in the yarn manufacturing facility (1), a free godet end (611) of a first high-temperature godet pair (61) of the yarn stretching device (6) on the processing path projects into the same first space half (R1) as a free godet end (511) of the inlet godet pair (5), and a rotation axis of a first godet (51) of the inlet godet pair (5) on the processing path is oriented at an angle of 0° to 45° with respect to the longitudinal direction (L) of the nozzle row (31). A heated relaxation godet pair (8) is arranged on a relaxation frame (80) arranged downstream of the stretching region frame (60) on the processing path, a passage (9) is formed between the stretching region frame (60) and the relaxation frame (80), and a free end (81) of the relaxation godet pair (8) projects into a second space half (R2) located on the side opposite to the first space half (R1). The yarn manufacturing facility (1) is characterized in this regard.

2. Among the high-temperature godet pairs (61, 62), at least two high-temperature godet pairs (61, 62) arranged successively directly on the processing path are arranged such that their respective free godet ends (611) project into space halves (R1, R2) facing opposite directions. The yarn manufacturing facility according to Claim 1 is characterized in this regard.

3. All of the high-temperature godet pairs (61, 62, 63) arranged on the stretching region frame (60) are arranged such that free godet ends (611, 631) of the high-temperature godet pairs (61, 62, 63) arranged successively directly on the processing path project into space halves (R1, R2) facing opposite directions. The yarn manufacturing facility according to Claim 2 is characterized in this regard.

4. Only the free godet end (641) of the uppermost high-temperature godet pair (64) of the extension region frame (60) projects into the same spatial half (R1) as the free godet end (631) of the high-temperature godet pair (63) disposed below the uppermost high-temperature godet pair (64). The uppermost high-temperature godet pair (64) projects into the same spatial half (R1) each time by at least half of the godet circumferential wall length of one of its godets, beyond the free godet end (631) of the high-temperature godet pair (63) disposed below the uppermost high-temperature godet pair (64). The yarn manufacturing facility according to claim 2, characterized in that.

5. The incoming godet pair (5) is attached to a drive module (10) disposed below and at least partially in front of the yarn incoming section (4). The yarn manufacturing facility according to any one of claims 1 to 4, characterized in that.

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