JP2024507277A - godet device - Google Patents

Abstract

The present invention relates to a godet device for a melt-spinning machine with a plurality of godets having a driven and partially heated godet peripheral wall. The godet is held by the support wall so that the godet peripheral wall protrudes. The heated godet peripheral wall is partially surrounded by an insulating housing held on the support wall. In order to influence the insulation effect of this insulating housing, at least one of the housing walls of the insulating housing is removably and replaceably held on the support wall.

Description

The invention relates to a godet device for a melt-spinning machine with a plurality of godets, according to the preamble of claim 1 .

The godet device mentioned at the outset is known, for example from WO 2015/049316.

When synthetic yarns are produced by a melt-spinning process, drawing of the synthetic yarns and relaxation of the yarns to reduce internal stresses are carried out by a godet device. Such a godet device has a plurality of godets with some unheated godet circumferential walls and some heated godet circumferential walls. The heated godet peripheral walls of these godets are used to temperature condition the yarn, thereby heating the yarn material to the drawing temperature and heating the yarn material to the relaxation temperature to reduce internal stresses. At this time, the godet peripheral wall has a different surface temperature depending on the processing state each time. In this case, it is necessary that the surrounding wall of the godet is not influenced as much as possible by temperature control based on a compact arrangement form. It is therefore known that the godet peripheral wall is arranged insulated from the surroundings. Nevertheless, in order to be able to maintain a compact arrangement, an insulating housing is used which surrounds the temperature-regulated godet peripheral wall.

For this purpose, in known godet devices, the godet jacket, which is heated at a higher temperature, is arranged inside a heat-insulating housing. The heated godet with a godet peripheral wall having a lower surface temperature is held outside the insulating housing and, in known godet devices, is separated from the surroundings by a cover housing. For this purpose, the godet, the insulating housing and the cover housing are held on the support wall. In this case, the cover housing and the heat-insulating housing have thread openings in order to allow thread running of the thread group on the circumferential surface of the godet peripheral wall.

Additional insulation measures may be required when product changes require a change in the heat treatment of the yarn group, which affects the surface temperature of the godet.

However, godet devices are also known in the prior art in which all heated godets are arranged inside an insulated housing. Such a godet device is known from DE 10 2013 211 809 A1. A plurality of insulation elements are provided inside the insulation housing to insulate the godet walls from each other. However, this increases the equipment complexity if a plurality of godet walls are to be operated at mutually equal surface temperatures in any case.

However, godet devices are also known in which the godet device or part of the godet device is held exchangeably in the machine frame. Such a godet device is described in DE 102017011183 A1. Therefore, extensive recombination work is required to stretch and relax the yarn when changing products.

Therefore, the object of the present invention is to improve the godet device for the melt spinning device of the form described at the beginning, so that a wide variety of synthetic yarns can be produced with as little equipment effort as possible and without the labor-intensive recombination work. The purpose is to be able to stretch and relax.

This object is achieved according to the invention in that at least one of the housing walls of the heat-insulating housing is removably and replaceably held on a support wall.

Advantageous refinements of the invention are defined by the features and feature combinations of the respective dependent claims.

The invention is based on the fact that, in order to produce fully drawn yarns, the heated godet circumferential wall of the godet can essentially be divided into two groups. Each group includes a plurality of heated godet walls. In this case, only the number of godet jackets used for stretching and relaxation, respectively, can be varied. The post-treatment of the yarn for shrinkage treatment is therefore usually carried out with a maximum of three godet jackets or alternatively two godet jackets. According to the invention, at least one of the housing walls of the insulating housing can be removed and replaced in order to insulate different numbers of godet jacket walls in the insulating housing as required. Thus, one of the housing walls of the insulating housing is removably and replaceably held on the support wall.

A refinement of the invention in which the supporting wall and/or the insulating housing has a plurality of retaining devices with which the replaceable housing walls can be selectively retained when the number of godet jacket walls each having an equal surface temperature is changed. The form is suitably implemented. Depending on the number of godet jackets, different shielding can therefore be realized inside the heat-insulating housing.

Particularly advantageous is a refinement of the invention in which the holding devices are formed at a distance from one another such that the spatial size of the heat-insulating housing is variable. The holding device thus guarantees the position of each one of the exchangeable housing walls forming a closed insulating housing that is accessible to the adjacent godet only through the thread entry opening.

For producing fully drawn yarns in a melt-spinning process, a refinement of the invention is particularly advantageous in which the spatial size of the insulating housing is variable in order to accommodate different numbers of heated godet jackets. understood. This makes it possible to carry out the stretching and relaxation of the thread by means of different numbers of godets, while leaving the godet peripheral wall in an unchanged position.

In order to protect the operator and avoid vapors arising, a cover housing is furthermore held on the support wall on the side of the insulating housing, by means of which a plurality of the godets arranged on the outside of the insulating housing are It has been specified that the heated godet peripheral wall can be enclosed.

Particularly advantageous in this case is a refinement of the invention in which a replaceable housing wall is arranged between the heat-insulating housing and the cover housing. Therefore, the cover housing or the insulation housing can be selectively enlarged or reduced.

Since relaxation and stress reduction in synthetic threads require a relatively high surface temperature on the godet circumferential wall in the range of 120-160° C., preferably 130-160° C., the heated godet circumferential wall of the godet Particularly advantageous is a refinement of the invention in which the insulation godets are designed as relaxation godets for the relaxation of the thread groups, optionally two or three relaxation godets being held against the thread path. . It is possible to carry out different yarn types and processes by changing only one heated godet jacket. It is therefore known to draw and relax fully drawn yarns in the dry state. It is also known to draw and relax such fully drawn yarns in the wet state. However, each method type requires a different number of relaxation godets.

The heated godets of the godet jacket are therefore formed outside the heat-insulating housing, preferably as predrawing godets, optionally three or two drawing godets being held against the yarn track. For this purpose, therefore, a position-invariant arrangement of five heated godets can be used, which makes it possible to carry out different yarn types and different manufacturing processes.

In this case, a stretching zone is advantageously formed between the relaxation godet and the pre-stretching godet for stretching the yarn group. Depending on the division into pre-stretching godets and relaxation godets, the stretching zone can be displaced.

The godet device according to the invention can therefore be used particularly flexibly, whereby the composite thread can be stretched and relaxed while the godet remains stationary.

In the following, the invention will be explained in detail based on several embodiments and with reference to the accompanying drawings.

1 is a schematic diagram of a first embodiment of a godet device according to the invention in several operating situations; FIG. 1 is a schematic diagram of a first embodiment of a godet device according to the invention in several operating situations; FIG. 2 is a schematic cross-sectional view of the heat-insulating housing of the embodiment shown in FIG. 1; FIG. 3 is a schematic diagram of another embodiment of a godet device according to the invention; FIG. 3 is a schematic diagram of another embodiment of a godet device according to the invention; FIG.

1.1 and 1.2 schematically show a first embodiment of a godet device according to the invention. This example shows a typical configuration of multiple godets used to produce fully drawn yarn (FDY) in a melt spinning device. Unless one of the figures is explicitly mentioned, the following description applies to both figures.

The illustrated embodiment has a plurality of godets 2.1 to 2.8. These godets 2.1 to 2.8 are arranged with respect to a predefined yarn running path. This thread running path is indicated by thread group 11. The godets 2.1 to 2.8 are arranged on the support wall 1 in such a way that the respectively driven godet peripheral wall 3.1 to 3.8 projects with respect to the front side of the support wall 1. The drive devices (not shown) for the godets 2.1 to 2.8 are arranged on the back side of the support wall. Godet devices with such a structural form are well known, and are described in detail in, for example, WO 2015/049316, so reference is made to the same cited reference in this specification, and other details of the drive device are The arrangement will not be further explained.

In order to guide the threads in the thread group 11 through the godet walls 3.1 to 3.8 in one winding with a relatively narrow thread spacing relative to each other, the threads are usually placed upstream of the first godet 2.1. A running device (not shown) is disposed at. Such a feed-in device has a comb yarn guide, a cutting device and a suction device, by means of which, in the event of yarn breakage, the yarn coming from the melt-spinning device can be removed all together. Regarding this, reference should also be made to the same issue cited.

In order to draw and relax the yarn group 11 in the melt-spinning process, a total of five godets 2.2 to 2.6 are provided, each with a heated godet jacket 3.2 to 3.6. The remaining godets 2.1, 2.7, 2.8 are designed with a significantly reduced diameter and are designed with unheated godet jackets 3.1, 3.7, 3.8.

The godets 2.1 to 2.8 are held fixedly arranged on the support wall 1 and form a defined thread path for the thread group 11. The thread group 11 is wound once around the godet peripheral walls 3.1 to 3.8. In this case, the wrapping angle is in each case in the range from 160° to 360°, particularly preferably from 180° to 360°, for the heated godet jackets 3.2 to 3.6. Depending on the process, the circumferential speed of the godet jackets 3.1 to 3.8 can be controlled individually by the assigned drive. Furthermore, the heating means provided in the godets 2.2 to 2.6 for heating the godet peripheral walls 3.2 to 3.6 can also be individually controlled, thereby making it possible to control the predetermined temperature for heat-treating the thread group 11. surface temperature is maintained. The heated godet jacket walls 3.2 to 3.6 of the godets 2.2 to 2.6 are partially arranged in a heat-insulating housing 4, separated from each other, so that the godet jacket walls 3.2 to 3 .6 mutual influence of surface temperatures due to the small spacing between them is prevented. The insulating housing 4 is formed by a plurality of housing walls 5 made of insulating material.

A cover housing 7 is assigned next to the heat-insulating housing 4 . By means of this cover housing 7, the heated godet jacket walls 3.2, 3.3 are covered on the outside of the heat-insulating housing 4 and are shielded from the surroundings. In this embodiment, the cover housing 7 is held on the side of the heat insulating housing 4. The heat insulating housing 4 and the cover housing 7 are held together on the support wall 1. The heat-insulating housing 4 and the cover housing 7 project with respect to the support wall 1 in such a way that they completely surround the godet peripheral walls 3.2 to 3.6 of the godets 2.2 to 2.6 on the support wall 1. The insulating housing 4 and the cover housing 7 may be closed off from each other separately or together by a door.

In order to guide the thread group 11, the cover housing 7 and the insulation housing 4 have a plurality of thread openings 8.1 to 8.3. A thread opening 8.1 is formed in the housing wall 7.1 of the cover housing 7 between the godet jacket walls 3.1, 3.2, and a thread opening 8.2, 8.3 is formed in the housing wall 7.1 of the insulation housing 4. It is formed on the wall 5. For this purpose, a replaceable housing wall 5.1 is formed in the insulation housing 4 between the cover housing 7 and the insulation housing 4. This exchangeable housing wall 5.1 is held on the insulating housing 4 by means of a holding device 6.1 or directly on the support wall 1. The holding device 6.1 is designed in such a way that the replaceable housing wall 5.1 is removably connected to the insulating housing 4. In addition to the holding device 6.1, a further holding device 6.2 is formed on the insulating housing 4 or directly on the support wall 1. The holding devices 6.1, 6.2 are formed in the insulating housing 4 at a distance from each other. In this case, the housing wall 5.1 is optionally held in a holding device 6.1 or 6.2. The arrangement of the housing wall 5.1 depends on the respective process for drawing and relaxing the thread group 11 and on the thread type.

Godets 2.7, 2.8 are arranged below the heat-insulating housing 4 and the cover housing 7, respectively, and are provided with unheated godet peripheral walls 3.7, 3.8. The running plane of the yarn group 11 developed by the godet jackets 3.7, 3.8 is normally used for post-processing. A wetting device is therefore preferably arranged upstream of the godet jacket 3.7 for wetting the threads of the thread group 11 with a fluid. Between the godet walls 3.7, 3.8, an interlacing device is preferably used in order to obtain a thread bond to the threads of the thread group 11 before winding up the threads to form the package. Such devices are neither shown nor described in detail. Regarding this, reference is made to the cited International Publication No. 2015/049316 here as well.

FIG. 1.1 shows a first arrangement of the housing wall 5.1. The housing wall 5.1 of the insulating housing 4 is arranged in the holding device 6.1 and forms a thread inlet between the cover housing 7 and the insulating housing 4. In this configuration of the housing wall 5.1, the insulating housing 4 has a maximum spatial size in order to surround and insulate all three heated godet jacket walls 3.4, 3.5, 3.6. are doing. The upstream heated godet jacket 3.2, 3.3 is held in the cover housing 7.

In order to draw and relax the threads of the thread group 11, the threads are first preheated in the godet jacket 3.2, 3.3. For this purpose, the godet walls 3.2, 3.3 each have a surface temperature of 50° C. to 110° C., particularly preferably 60° C. to 80° C., for example. These godets for preheat-treating the yarn group can also be referred to as pre-stretching godets. For this purpose, the pre-stretching godets 2.2, 2.3 are shielded by a cover housing 7.

The differential speed required to draw the thread occurs between the godet walls 3.3 and 3.4. In this regard, the thread is drawn at the entrance of the godet jacket 3.4 of the middle godet 2.4. After drawing, relaxation and thus stress reduction begins directly in the yarns of the yarn group 11, so that the surface temperature of the godet jacket 3.4 is heated to a temperature of, for example, 160° C. Due to the stress reduction in the threads of the thread group 11, the godet jackets 3.4 to 3.6 of the godets 2.4 to 2.6 operate at approximately equal circumferential speeds and/or at the same surface temperature. The godet peripheral walls 3.4 to 3.6 of the godets 2.4 to 2.6 may be operated with peripheral speeds reduced by 1 to 5% and/or surface temperatures reduced by 10 to 70%. The godets used to relax the threads are also referred to herein as relaxation godets. In this regard, a total of three relaxation godets 2.4 to 2.6 with godet peripheral walls 3.4 to 3.6 are arranged inside the insulating housing 4 and are held insulated in the support wall 1. .

The arrangement and distribution of the heated godet jackets 3.2 to 3.6 inside the cover housing 7 and the insulating housing 4 as shown in FIG. Used for the drawn process.

FIG. 1.2 shows an embodiment in which the godets 2.1 to 2.8 are arranged in the same manner. In this embodiment, the replaceable housing wall 5.1 of the insulating housing 4 is held in a holding device 6.2. As a result, the spatial size of the heat-insulating housing 4 is reduced, and a thread inlet 8.2 is formed in the thread run between the godet walls 3.4, 3.5. Therefore, only the godet peripheral walls 3.5, 3.6 of the godets 2.5, 2.6 are arranged inside the heat-insulating housing 4, insulated from the remaining godets 2.2 to 2.4. Godet peripheral walls 3.2 to 3.4 arranged on the outside of this insulating housing 4 are arranged in the cover housing 7 and in the open area of the insulating housing 4.

In the embodiment of the configuration of the insulating housing 4 shown in FIG. 1.2, the godets 2.2 to 2.4 are used as pre-drawing godets in order to heat the yarn group 11 to the drawing temperature required for drawing. . The drawing of the yarn group takes place in the yarn running path between the godet walls 3.4, 3.5.

For damping, godet jackets 3.5, 3.6 are arranged inside the heat-insulating housing 4 as damping godets 2.5, 2.6. This configuration of the insulating housing 4 is preferably used in processes where the yarn is drawn from the spinning device in a wet state.

The holding devices 6.1, 6.2 shown in FIGS. 1.1 and 1.2 can be formed directly on the insulating housing 4 or in the support wall 1 with different structural configurations. You can leave it there. One possible embodiment is shown schematically in FIG. FIG. 2 shows a part of the insulating housing 4 held on the support wall 1. In FIG. The insulating housing 4 is held on the support wall 1 via the housing wall 5. The holding device 6.1 is designed as a plug connection device 9. For this purpose, the wall 5 of the heat-insulating housing 4 has a plurality of insertion openings 9.1. A plurality of retaining projections 10 of the replaceable housing wall 5.1 are held in these plug-in openings 9.1. Therefore, the housing wall 5.1 can be easily attached and detached. In this case, the plug-in opening 9.1 can also be correspondingly formed in the support wall 1 for extension. However, alternatively, it is also possible to form the retaining device 6.1 directly on the support wall 1.

3.1 and 3.2 show further embodiments of the godet device according to the invention in several operating situations. The embodiment shown in FIGS. 3.1 and 3.2 is similar to the embodiment shown in FIGS. It is formed identically to the example. To this extent, only the differences from the previously described embodiments will be explained here, and for other points, reference will be made to the above description.

In the embodiment shown in FIGS. 3.1 and 3.2, the insulating housing is provided with only one holding device 6.1 for attaching the replaceable housing wall 5.1. A heat-insulating separating wall 5.2 is arranged inside the heat-insulating housing 4 at a distance from this holding device 6.1. This separating wall 5.2 together with the housing wall 5 forms a thread inlet 8.3 between the godet jacket walls 3.4, 3.5.

A housing wall 5.1 is removably and exchangeably retained in the retaining device 6.1, thereby selectively and independently retaining the godet circumferential wall 3.4 of the godet 2.4. Can be done. This situation is illustrated in Figure 3.1.

As is clear from FIG. 3.1, the housing wall 5.1 separates the cover housing 7 from the insulation housing 4 and forms a thread inlet 8.2. The godet peripheral walls 3.4 to 3.6 are therefore arranged inside the insulating housing 4. In this case, the godet jacket 3.4 is kept separately and insulated. Therefore, for stretching and relaxing the thread group 11, a total of two pre-stretching godets 2.2, 2.3 are provided in the cover housing 7, and a total of three relaxing godets 2.4 to 2.6 are insulated. provided within the housing 4.

In the operating state shown in FIG. 3.2, the housing wall 5.1 has been removed, so that the region of the godet jacket 3.4 relative to the cover housing 7 is open. This configuration of the insulating housing 4 therefore has a total of three pre-stretching godets 2.2 to 2.4 and a total of two relaxing godets 2.5, 2.6 for stretching and relaxing the yarn group 11. is provided.

It should be explicitly stated here that in the illustrated embodiment, the number of each godet circumferential wall disposed inside the insulating housing is by way of example only. Further, the number of godets inside the cover housing is also an example. What is important for the godet device according to the invention is that the insulation effect of the insulation housing is varied by means of a removable and replaceable housing wall.

Claims (9)

A godet device for a melt-spinning machine comprising a plurality of godets (2.1 to 2.8) having a driven and partially heated godet peripheral wall (3.1 to 3.8), comprising: a support wall (1) that holds the godets (2.1 to 2.8) in a protruding manner with their godet peripheral walls (3.1 to 3.8); an insulating housing (4) surrounding at least a portion of the heated godet peripheral wall (3.2-3.6) of 2.2-2.6) and having a plurality of housing walls (5, 5.1); In a godet device comprising:
Godet device, characterized in that at least one of the housing walls (5, 5.1) of the insulating housing (4) is removably and replaceably retained on the support wall (1) . The support wall (1) and/or the insulating housing (4) are provided with a plurality of retaining devices (6.1, 6.2) capable of selectively retaining the exchangeable housing wall (5.1). Godet device according to claim 1, characterized in that it has a. Godet device according to claim 2, characterized in that the holding devices (6.1, 6.2) are formed at a distance from each other so that the spatial size of the heat-insulating housing (4) is variable. . Godet according to claim 3, characterized in that the spatial size of the insulating housing (4) is variable in order to accommodate different numbers of heated godet peripheral walls (3.2 to 3.6). Device. A cover housing (7) is held on the supporting wall (1) on the side of the insulating housing (4), by means of which the Godet according to one of claims 1 to 4, characterized in that a plurality of godet walls (3.2 to 3.6) arranged on the outside of the heat-insulating housing (4) are enclosable. Device. Godet device according to claim 5, characterized in that the replaceable housing wall (5.1) is arranged between the insulating housing (4) and the cover housing (7). The heated godet peripheral wall (3.2-3.6) of the godet (2.2-2.6) has a relaxation godet inside the heat-insulating housing (4) for relaxing the thread group (11). 7. Godet arrangement as claimed in claim 1, characterized in that it is designed as a gasket, and optionally two or three relaxation godets are held against the yarn run. The heated godet peripheral wall (3.2-3.6) of the godet (2.2-2.6) is formed as a pre-stretched godet on the outside of the heat-insulating housing (4) and optionally 8. Godet device according to claim 1, characterized in that three or two pre-stretching godets are held against the yarn track. A stretching zone for stretching the yarn group (11) is formed between the relaxation godet (2.2 to 2.6) and the pre-stretching godet (2.2 to 2.6). The godet device according to claim 7 or 8.

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