WO2012093018A1

WO2012093018A1 - Strip treatment device, and method for thermofixing and drawing strips

Info

Publication number: WO2012093018A1
Application number: PCT/EP2011/072325
Authority: WO
Inventors: Oliver Stang
Original assignee: Mageba-Textilmaschinen Gmbh & Co. Kg
Priority date: 2011-01-03
Filing date: 2011-12-09
Publication date: 2012-07-12
Also published as: DE102011000010A1

Abstract

The invention relates first of all to a strip treatment device (1), for example a dryer or thermofixing unit, preferably for strips of textile materials, for example narrow strips, having a plurality of deflection rollers (7-23) which are arranged in pairs and are spaced apart vertically or horizontally, over which deflection rollers (7-23) the strip (6) is guided, in a superimposed manner with respect to a horizontal or vertical basic passage direction of the strip treatment device, transversely with respect hereto, wherein the strip is guided multiple times over the same deflection rollers (7-23) and the deflection rollers (7-23) are arranged overall in a substantially closed housing. In order to achieve improved process management and an improved embodiment of the device, it is proposed that, with regard to a pair of deflection rollers, at least one, preferably the lower one in the case of deflection rollers which are spaced apart vertically, is driven, that, furthermore, one or both deflection rollers of the pair can be modified with regard to the orientation of their axis, and that the associated deflection rollers (7-23) of a plurality of pairs are arranged next to one another or above one another. Furthermore, the invention relates to a method for thermofixing and drawing strips or the like in a thermofixing device.

Description

Belt treatment apparatus and method for thermosetting and strapping tapes.

The invention initially relates to a belt treatment device preferably for a belt, for example a dryer or heat-setting unit, preferably for belts made of textile materials, for example narrow belts, with a plurality of paired and vertically or horizontally spaced deflection rollers over which the belt is superimposed to a horizontal or vertical basic enforcement direction of the belt treatment device is guided transversely thereto, wherein the tape is guided over several ü over the same pulleys and the pulleys are arranged in a substantially closed housing in total.

Such belt treatment devices have already become known in various embodiments. It is for example on the WO

2005/113878 AI and EP 2,135,986 AI referenced. In the known from the first-mentioned publication strip treatment device, the pulleys are divided into several groups to each other, wherein within a group a tape return is made. In each case a length compensation device can be provided between two groups of deflection rollers. In the band-treating apparatus known from the second-mentioned publication, four rollers are grouped together, the upper rollers being arranged side by side with each other and the lower rollers, and displacement and recirculation are performed within these four rollers, respectively.

Even though the known devices have already made considerable progress in terms of the control of such devices Achieve shrinkage of the tapes, there is still a need for improved process control and execution of the device.

In thermofixing, controlled shrinking or stretching of textile materials (tapes, belts or the like) results in desired / required technical properties, such as, for example, B. elongation and breaking load set / achieved. For this purpose, a heating to a temperature generally above 100 ° C, preferably between 200 ° C to 240 ° C which under the action of a force, a reorientation of the molecules, namely optimized in the longitudinal direction of the textile material, is to be achieved. Subsequently, the textile material is cooled while maintaining the force influence, wherein the achieved technical properties of the textile material such. B. elongation or breaking load permanently conditioned and fixed. Even if the tension decreases, the set technical properties of the textile material are maintained.

In general, the devices and the method for the treatment of textile tapes, as used here, for example, serve as safety belts in motor vehicles and aircraft. But also for textile strand structures in general, elastic bands and inelastic bands, for example narrow textiles for technical or medical use. With regard to the material, it may in particular be polyester or, for example, also polyamide or other synthetic fibers. The requirements for such a treatment device are complex. On the one hand, it should be ensured that the belt is heated up to its innermost area. On the other hand, the belt surface must not be subjected to excessive temperatures and damaged. Which he- heating should last for a certain period of time, which is usually between two minutes or more and up to five minutes. It is preferably about three minutes. For economical operation of such a device, the processing speed should be relatively high. In particular in the range of 30 to 120 m / min, preferably between 50 to 85 m / min. It should give a residence time of the belt in the range of said three minutes (preferred) in the device. From this, the corresponding absorption capacity of such a device can be calculated. Nevertheless, in order to achieve a compact design, the belt is guided in the interior of the device over said pulleys. However, the required large number of pulleys results in that from outside the device by means for applying the force z. B. forces exerted by an inlet and outlet on the belt forces are not effective in a wide range within the device with respect to the belt. The belt in the middle part of the device can only be influenced weakly or not at all. On the other hand, the conditioning (shrinking or stretching) of the belt does not happen abruptly, but only with increasing warming of the belt in the course of enforcing the device. In addition, due to factors such. As fluctuations in material quality or article differences, the heating takes place faster or slower, with the result that the exact time of conditioning can not be determined exactly in advance.

Proceeding from this, the invention is concerned with the object of specifying an advantageous device and an advantageous method.

A possible solution to the problem is given according to a first idea of the invention in a device in which with respect to a pair of deflecting roll at least one, with vertically spaced pulleys preferably the lower, is driven, further one or both pulleys of the pair with respect to the orientation of its axis are changeable and the associated pulleys of several pairs are arranged side by side or one above the other. Due to the possibility of driving the at least one, preferably lower, pulley of a pair of pulleys, an adjustment of the tension of the belt in the region of the entire device is possible in conjunction with the application of heat or the heating of the belt itself. Characterized in that a deflection roller is changeable with respect to the alignment of its axis, the laying in the axial direction of a deflection roller can be achieved solely by this oblique orientation of the axis. Disturbing effects on the tape through laying aids are not required. The fact that several pairs of pulleys are arranged side by side, a good spatial utilization, in particular the height of a device is possible. In addition, driving connections between adjacently arranged deflection rollers can be carried out low.

With regard to the method, a first possible solution provides for the object that the strip is guided in a zigzag manner with respect to a total penetration of the heat-setting cabinet in a plan view or, with respect to vertically spaced deflection rollers, for example a front view, but with respect to the direction of penetration of the strip successively arranged pairs of pulleys each without feedback, with a lateral installation in each pair of pulleys. The fact that no return is provided, a better balance in terms of temperature of the band is possible. The areas of the band having a particular temperature relate to a uniform length of the band. They also successively enforce the device and Do not jump back and forth. Characterized in that a lateral routing is performed between each pair of pulleys, a narrow zigzag guiding the tape is achieved in the device. This also supports uniform heat application.

Further features of the invention are described below, also in the figure description and the drawing, often in their preferred assignment to the concepts already explained above or illustrated, but they can also be assigned to only one or more individual features described herein or are represented graphically, or independently or in another overall concept of importance. In particular, device features described within the scope of the device may be significant for a method claim, and vice versa. Thus, it is initially preferred that only pairs of deflection rollers are provided and that with respect to each pair of deflection rollers at least one deflection roller is driven. A pair of pulleys are two preferably vertically associated pulleys, which can be wrapped by the band passing through the device in immediate succession. It is also conceivable a construction with horizontally assigned pairs of rollers. Characterized in that a pulley is driven with respect to each pair of pulleys, an optimal conditioning of the belt in the course of enforcing the device can be achieved. With regard to the drive of a deflection roller of a pair of deflection rollers is also preferred that the drive of a deflection roller is also used for driving an adjacent deflection roller or a further pair of deflection rollers. This can be achieved by a gearbox, a belt or a chain Transmission to be achieved. So it is not necessary for each pair of pulleys in any case a drive motor. However, it may be preferred that with respect to each pair of pulleys, a pulley is driven directly or indirectly.

It is further preferred that at least three pairs of deflection rollers are arranged side by side, in the direction of penetration of the device, more preferably at least one or both deflection rollers of this pair being segmented in a pair of deflection rollers located between the two outer pairs of deflection rollers. This means that in the axial direction of the guide roller a plurality of juxtaposed independently rotatable roller sections are formed. These roller sections all rotate around the same geometric axis but are independent of each other. They may be designed to run along, but may also be designed to be driven, at least in the case of a single or multiple deflection rollers. About each

Segment of such a segmented deflection roller, the band preferably runs in one lane. In a conditioning, which causes only a small change in length of the band, however, a band profile of two or more webs per roller segment is conceivable.

It is further preferred that all pairs of pulleys have at least one roller which is driven.

Furthermore, it is also preferred that the drive of a deflection roller can be controlled or regulated as a function of a measured applied tension force of the belt. In this case, the speed and the torque of the respective role can be controlled or regulated in a directly driven pulley via the drive itself. In the case of an indirectly driven deflection role can be provided a fixed gear ratio, but if necessary, a changeable gear ratio can be provided. On the other hand, it may be sufficient and is generally preferred that the driven rollers of at least two pairs of pulleys are driven in a fixed predetermined relationship to each other. Preferably, these are directly adjacent to each other arranged pulleys.

Within a pair of deflection rollers, moreover, it is also preferred, as far as one of the deflection rollers is segmented, that both deflection rollers of the pair have the same configuration with respect to the segmentation. In a further procedural embodiment, it is also preferred that the lateral laying is in each case provided in opposite directions with regard to pairs of deflection rollers arranged one behind the other in the direction of penetration of the band. With respect to a basic penetration direction of the device, the laying in each case runs transversely to this basic enforcement direction. Namely, preferably, as viewed with respect to a front and back of the apparatus, first from the front to the back and then from the back to the front, etc.

It is further preferred that the strip is first guided over an insert drive, which is also preferably arranged outside the heat-setting cabinet, and that the drive of the deflection rollers in the heat-setting cabinet is controlled or regulated with respect to the drive provided at the insert drive , It is also preferred that within the thermofixing device, preferably at several points, a tensile load of the band is measured and acted upon in dependence on the drive.

With regard to the disclosure, the ranges and ranges of values given above and below also include all intermediate values, in particular in 1/10 increments of the respective dimension, if appropriate also without dimensions, with regard to periods of time given in minutes, in particular also seconds. on the one hand, to delimit the stated range limits from below and / or above, alternatively or additionally but also with regard to the disclosure of one or more singular values from a respective range. The invention will be further explained below with reference to the attached drawing, which, however, represents only one embodiment. Hereby shows:

Fig. L is a schematic side view of an overall device with inlet drive, thermofixing device, cooling section and

Outlet works;

FIG. 2 is a plan view of lower rollers of roller pairs provided in the heat setting device; FIG.

Fig. 3 is a plan view of upper rollers of roller pairs provided in the heat setting device; Fig. 4 is a schematic side view of a respect to her

Axis alignment of variable rollers;

Fig. 5 is a schematic laying view of a belt within the heat setting device; and

6 is a vertical section along the line VI-VI in Fig. 1st

Illustrated and described by way of example is a heat-setting unit 1 with a thermo-fixing cabinet 2, an upstream infeed unit 3, a cooling section 4 and an outfeed unit 5.

A band 6, which is a single band, first passes through the infeed unit 3 and then the thermo-fixing cabinet 2, after leaving the thermosetting cabinet 2 the cooling section 4 and the outfeed unit 5. Various synthetic fibers do not require maintenance of the tensile stress until complete cooling. For this reason, an alternative arrangement of the cooling zone behind the outfeed come into question. In the heat-setting cabinet 2, a plurality of pairs of deflection rollers 7, 8 one above the other, preferably congruent one above the other, with rectified alignment of geometric longitudinal axes A, see Fig. 2, respectively. Each pair of pulleys is given by two congruent superposed pulleys 7, 8. In any case, the deflection rollers 7, 8 are arranged congruently one above the other in such a way that an offset in the direction of penetration of the heat-setting cabinet 2 corresponds to less than a diameter of a deflection roller 7, 8. In an executed system, for example, seven pairs of deflection rollers 7, 8 arranged in the basic enforcement direction of the belt 6 in the thermo-fixing 2 next to each other. In any case, three such pairs of deflection rollers 7, 8 are preferred. Up to, for example, ten pairs of deflection rollers 7, 8 next to one another.

With regard to all pairs of deflection rollers 7, 8 which are arranged in the heat-setting cabinet 2, at least one of the rollers, namely in the embodiment, in each case the lower deflection roller 7, is driven. Further, at least one of the rollers 7, 8, in the embodiment in each case both deflection rollers 7, 8, in the orientation of its axis A with respect to a vertical plane changeable. One end of the pulleys 7, 8 is thus lower than the other end lowered or raised. The raising and lowering preferably takes place in the same vertical plane in which the axis A also extends in the case of horizontal alignment.

In Fig. 5, the enforcement of the belt 6 is shown in detail with respect to the heat-setting cabinet 2. First of all, starting from the inlet region 9 of the heat-setting oven, a basic penetration direction up to the outlet region 10 can be recognized. This basic enforcement direction is given in the longitudinal direction of the embodiment of a substantially rectangular floor plan heat-setting cabinet 2. Within the heat-setting oven 2, the belt 6 is continuously moved from an initial region 12 of a deflection roller 7 or 8 assigned to a front side 11 to an end region 13 of the deflection roller 7 or 8, respectively laid. From this end portion 13 then takes place a transfer of the belt 6 to the immediate adjacent deflection roller 14 and 15, in parallel alignment with the back 12, whereupon then in this second pair of pulleys 14, 15 a transfer from the rear end 13 to the front end 12 takes place. From the front end of the guide rollers 14, 15 then takes place a transfer to the deflection rollers 16, 17, and also in parallel alignment to the longitudinal edge edge of the device. This process is repeated until reaching the last pair of deflection rollers 22, 23, wherein more preferably, as can be seen, in the end region 10, the band 6 associated with the rear side 12 of the heat-setting cabinet 2 emerges from this. An entry of the band 6 assigned to the rear side 12 can also take place in the entry area 9, then it is preferred that the outlet of the band 6 is assigned to the front side 11 in the exit area 10. Said assignment to the front or rear side means that the band 6 runs onto or exits from the initial region 12 or end region 13 of a deflection roller 7, 8, etc.

As is apparent in particular from FIG. 2, individual deflection rollers 14 to 19 are segmented. Also, the segmentation of all roles could be advantageous with appropriate properties of the material to be treated. These deflection rollers 14 to 21 have one or more segments Si, which are movable or even drivable independently of a segment S _{2 of the} same deflection roller located in the direction of the axis A next to it.

As is further apparent in the exemplary embodiment, it is provided in the direction of penetration of the belt 6 that the first deflection rollers 7, 8, which constitute the inlet region, are not segmented, just like the last deflection rollers 22, 23, which constitute the outlet region. In the basic enforcement direction following the first deflection rollers 7, 8, however, the second pair of deflection rollers 14, 15 is already segmented, namely it has five segments Si, S ₂ , ... on. In the exemplary embodiment, the segments Si, S ₂ ,... Of the segmented circulating rollers 14 to 19 are preferably driven only in a running manner and not by themselves. The number and arrangement of driven and non-driven roller segments varies according to the material requirement.

The pulleys 7 etc. are in this case driven in detail by electric motors 25, 26, 29.

A plurality of, cf. Fig. 1, only schematically indicated here, tension measuring devices 30 are provided. By means of the values determined by the tension measuring devices 30, the drive power of the motors 25, 26, 29, etc. can be or is controlled.

With regard to the hot air duct in the heat-setting cabinet 2, not shown in detail vertically aligned slot openings are provided, in which hot air exits from a hot air duct. The slot openings are preferably provided centrally with respect to a deflection roller 7 to 23. Thus, the hot air is discharged into the interior of the given with respect to a pair of pulleys 7, 8, etc., space, which is spanned by the laid tape swept. For heating the textile material is z. As well as the use of infrared lamps or exposure to microwaves as an alternative or supplement to hot air heating conceivable.

The cooling of the textile material in the cooling zone is preferably carried out by passive air cooling or forced exposure to ambient air by means of a blower. However, it is also conceivable the use of cooled Air, nitrogen, water or other media suitable for cooling the textile material.

The illustration according to FIG. 6 makes it possible to recognize the oblique orientation of the longitudinal axes A with respect to the deflection rollers 7, 8, which however can also apply in the same way to the deflection rollers 15, etc. In dash-dotted representation, the possible orientations of the longitudinal axis A are shown. One end portion of a roll is as it were in a fixed bearing (but allows certain angular changes), the other end added to a height-adjustable bearing. It is also possible a recording at both ends in height changeable bearings. If only one height-changeable bearing, as is preferred, is provided in a roller, it is further preferred that the assigned roller of the roller pair, ie the roller located vertically above or horizontally behind it, has the height-changeable bearing on the same side. However, they can also be provided alternately.

All disclosed features are essential to the invention. The disclosure content of the related / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application. The subclaims characterize in their optionally sibling version independent inventive development of the prior art, in particular in order to make divisional applications on the basis of these claims.

Claims

1. Belt treatment device (1), for example a dryer or thermofixing unit, preferably for belts made of textile materials, for example narrow belts, with a plurality of deflection rollers (7-23) arranged in pairs and vertically or horizontally, via which deflection rollers (7 23) the strip (6) is guided in a superimposed manner to a horizontal or vertical ground penetration direction of the strip treatment device transversely thereto, the strip being guided several times over the same deflection rollers (7-23) and the deflection rollers (7-23) are arranged in a substantially closed housing, characterized in that with respect to a pair of pulleys at least one vertically spaced guide rollers preferably the lower, is driven, that further one or both pulleys of the pair with respect to the orientation of its axis (A) changeable is, and that the associated pulleys (7-23) of several pairs side by side or überei are arranged one above the other.

2. belt treatment device according to claim 1 or in particular according to, characterized in that the drive of a deflection roller of a

Pair is also available for driving a pulley (7-23) of an adjacent pair.

3. belt treatment device according to one or more of the preceding claims or in particular according thereto, characterized in that at least three pairs of deflection rollers (7-23) are arranged side by side or one above the other, wherein between the two outer or upper and lower Pairs of pulleys located Pair of pulleys one or both pulleys are segmented, more preferably, within a pair of pulleys (7- 23) is provided a same training with respect to a segmentation.

4. Belt treatment device according to one or more of the preceding claims or in particular according thereto, characterized in that all pairs of deflection rollers (7-23) have at least one deflection roller which is driven.

5. Belt treatment device according to one or more of the preceding claims or in particular according thereto, characterized in that the drive of a deflection roller (7-23) in dependence of a measured tensile stress of the belt (6) is controlled or regulated, wherein, preferably , In any case, two pairs of pulleys (7-23) are driven in a fixed predetermined ratio to each other.

6. A method for thermofixing and stretching of strips or the like. In a thermofixing device, wherein a band is guided over vertically or horizontally spaced, arranged in pairs deflection rollers, characterized in that the band based on a total enforcement of the heat setting in a plan view or side view zigzag is guided, but with respect to the enforcement in the direction of the tape successively arranged pairs of deflecting rollers each without feedback and with a lateral installation in each pair of pulleys.

7. The method according to claim 8 or in particular according thereto, characterized in that the lateral laying is carried out in each case in opposite directions with respect to in the direction of enforcement of the tape successively arranged pairs of pulleys.

8. The method according to any one of claims 8 or 9 or in particular according thereto, characterized in that with respect to the pairs of deflecting rollers in each case a deflection roller, preferably the lower, or rear, is driven.

Method according to one or more of the preceding claims or in particular according thereto, characterized in that the belt is first guided over an insert drive, preferably arranged outside the heat-setting cabinet, and that the drive of the rollers in the heat-setting cabinet is controlled with respect to the drive provided at the insert drive or regulated.

10. The method according to one or more of the preceding claims or in particular according thereto, characterized in that within the heat-setting, preferably at several points, a tensile load of the tape is measured.