DE102012009871B3 - Apparatus for heat-setting tapes, in particular label tapes, produced from a fusible web - Google Patents

Abstract

It is a device for thermofixing patterned ribbons made of meltable material. These are produced from a wide web by means of heated melt cutters, whereby melt edges are formed on the tapes. For the transport of the bands in the device provides a trigger unit, which has a trigger tree. The bands wrap around a partial circumference of the trigger tree, wherein its peripheral surface is indeed unyielding, but has roughness, which provide for the transport of the bands in the field of heat setting. The heat-setting of the bands takes place via a heated contact surface of a pressing member, which presses against the peripheral surface of the withdrawal tree in the looping region of the bands. The latter then forms an abutment during heat-setting. In order to improve the quality of the strip end product, it is proposed to produce the roughnesses on the peripheral surface of the withdrawal tree from elevations and / or depressions having an average particle size of less than or equal to 50 microns.

Description

The invention is directed to a device specified in the preamble of claim 1 Art.

The wide web is made of meltable material on a weaving or knitting machine, in which a plurality of bands are initially produced peripherally contiguous, in adjacent railway zones. The wide web is then cut between the individual web zones by a respective fusion cutter, in particular in the form of a heated cutting wire, into adjacent bands, edge edges of which melt edges being formed on the bands. The enamel edges ensure that the thread material does not fray at the edges of the tape. At the output of the device is a withdrawal unit for the bands, which has at least one trigger tree. The bands wrap around a partial circumference of the trigger tree whose peripheral surface is unyielding and provided with roughness, which ensure a slip-free transport of the bands through the device.

The peripheral surface of the trigger tree also serves as a mating surface for a heated pressure member, which is pressed with its pressure surface against the bands surrounding the trigger tree. As a result, a so-called "heat-setting" of the bands takes place. The heat treatment ensures that the bands shrink, but are permanently fixed in their shape. This prevents subsequent dimensional changes of the tape or the label cut therefrom. The stresses in the bands resulting from the preceding manufacturing and / or finishing processes are eliminated by the heat-setting and dimensional stability of the bands is achieved. Also, the otherwise occurring tendency of the strip edges to curl is eliminated. But especially important is the mentioned dimensional stabilization of the bands, because a later undesirable shrinkage of the bands, z. B. by washing, is prevented. The temperatures during heat setting may be above 200 ° C.

The production of the wide web, the cutting of the broad web into bands by means of heated cutting wires and finally the thermofixing of the produced ribbons can if necessary also be carried out successively in two or three separate devices. The heat-setting of the tapes is in any case the last phase for the production and treatment of the tapes. The unyielding, roughened peripheral surface of the trigger tree in this last phase, during its thermosetting, provides for a defined positioning of the individual bands. Due to their reliable positioning during thermofixing on the circumference of the trigger tree, the finished ribbons are given their flawless shape after completion of the heat-setting process. Otherwise, inferior bands will result.

Such a device is from the EP 0 389 793 A2 known. The melting edges formed on the bands are relatively hard. If they are not treated, they have a rough profile. Untreated labels on the garments cause pressure points on the human body when wearing the garment, which is unpleasant. The post-treatment of the hard edges can be done in various ways. In the aforementioned publication, the edge regions of the bands are folded along edge-parallel fold lines, whereby folding edges arise at the strip edges. The production of such bands is because of the folded edge areas material and laborious.

Cheaper in this regard are ribbons in which the rough edges are smoothed in an aftertreatment device. This can be achieved by a resilient pressure member according to the WO 93/02246 A1 happen where the bands are passed with their melt edges through a heated pair of rollers before heat-setting. This smoothes the edges of the enamel. Nevertheless, the finished tapes exhibited an unpleasant disturbing hardness after being heat-set at their edges.

The invention has for its object to develop a device specified in the preamble of claim 1 way in which the finished tapes are dimensionally stable and have very soft edges in their edge zones. This is inventively achieved by the measures mentioned in the characterizing part of claim 1, which have the following special significance.

The invention has recognized that the cause of the heat-setting edges still occurring after their after-treatment is the hard-setting edges of the finished strips. Because of the heated pressure surfaces of the pressing members soften the edges of the belts. Because they are pressed to stabilize the position of the rough peripheral surface of the trigger tree, while impressing the roughness on the circumference of the trigger tree in the melt edges. Behind the heat-setting zone of the device, the rough profile created by the roughnesses cures in the edges of the melt and thus creates disturbing hard edges on the finished strips. This effect can be visually compared with a "signet ring effect", where a positive impression of a negative profile in the signet ring in a Softened sealant produced a positive counter profile. After realization of the invention, the roughness profile of the peripheral surface of the trigger tree is impressed in an analogous manner in the soft edges of the melting bands and generates after cooling of the bands a counter-profile to the strip edges. Without the measures according to the invention, therefore, the finished tapes still have troublesome hard edges.

The roughness on the peripheral surface of the trigger tree can consist of elevations and / or depressions in the invention. On the one hand, the invention proposes to make such surface roughnesses as small as possible in terms of size but, on the other hand, to make them sufficiently large to ensure slip-free transport of the strips in the zone of their heat-setting. According to the invention, an average particle size of the roughnesses of less than or equal to 50 microns has proven suitable for this purpose.

This mean particle size can be defined as a so-called "mean elevation", which results arithmetically in the following way. Through the elevations or depressions on the peripheral surface of the Abzusbaumes an ideal geometric surface is first laid as a "zero line". Then all surface areas are added together to produce the so-called "arithmetic mean roughness" Ra. This value Ra is then divided by the length of the area considered in this addition. This then leads to the mentioned "average elevation" or to the altitude of the mean particle size according to the invention.

Such a minimal particle size produces such a small surface profile that the melt edges softened during the heat-setting obviously no longer can be impressed between the minimal gaps between adjacent particles. This explains the surprising result of the invention where the finished tapes have unsurpassably soft edges at the exit of the device.

After the above signet ring effect, it is best for the marginal softness of the bands to form the elevations or depressions in the peripheral region of the trigger tree as small as possible. However, the latter has a lower limit because such roughness during heat setting at the same time have the above-mentioned task to ensure a displacement-free positioning of the bands on the circumference of the trigger tree. The above-mentioned effects in thermosetting can only be done on a positionally secure band. For this purpose, the invention proposes according to claim 2, the elevations or depressions with an average particle size of greater than or equal to 15 microns form. As tests show, this has proven very well.

It is common to create the roughness on the peripheral surface of the fetching tree by grits of an abrasive paper. For this purpose, the abrasive paper is used to cover the peripheral surface of the trigger tree and fixed in this position. Subsequently, the naming of the grain sizes according to the European standard FEPA (Federation of European Producers of Abrasives) take place.

Based on this, the grain size of an inventive abrasive paper according to the FEPA / P list would be numerically greater than or equal to P240. Granulations that are greater than or equal to P320 according to this list have proven particularly useful.

Further measures and advantages of the invention will become apparent from the dependent claims, the following description and the drawings. In the drawings, the invention is shown schematically an embodiment.

Show it:

1 in a perspective, schematic representation of various phases of work in the manufacture of tapes of a woven wide web;

2 the side view of a device according to the invention on the wide web according to 1 immediately mitgewebt and z. B. is cut by a trained as a heated heating wire fusion cutter in adjacent bands whose edges are first smoothed before fixing in an aftertreatment device;

3 an enlarged view of the in 2 III area of the device;

4 in enlargement a section of in 2 marked with IV zone in the peripheral region of a trigger tree of the device of 2 ;

5 in high magnification, a portion of an abrasive paper, which on a peripheral surface of the elevator tree of 2 is attached, and

6 in high magnification, a longitudinal section through a known band in the region of its edge according to the prior art and in the phase of its heat setting when it is in the region of the roughness on the peripheral surface of the trigger tree.

The 1 shows only the in 2 With 21 designated initial area of a device 20 on which a broad gauge 10 is made by weaving. Such a broad-gauge 10 could also be made on other textile machinery, such. B. knitting machines. The Breitbahn 10 could also be a nonwoven, a film or another railway product, which consists of meltable material.

In 1 becomes the Breitbahn 10 at the there with 12 marked weave by crossing warp threads 11 with weft threads 14 generated, with the weft threads 14 over the whole width 13 the train 10 extend. In the present case, it is a broad gauge 10 for producing tape acting as a label 10 ' on her show side 16 with woven patterns 17 are provided. The sample 17 appear in multiple arrangement in adjacent longitudinal strips 18 , The back of the wide web 10 is with 15 designated. Also in the longitudinal direction of the longitudinal strips 18 the patterns appear 17 in multiple arrangement.

In the space 19 two vertical stripes 18 Melt cutters are provided in the present case from his heated cutting wire 31 consist. The cutting wires 31 In the illustrated embodiment are part of a smoothing device to be described in more detail 30 , Through the cutting wires 31 become in the Breitbahn 10 cuts 22 generated by which the broad web 10 in many bands 10 ' is split. This happens while the broad-web 10 in the sense of the arrow 23 from a deduction unit to be described in more detail 40 is transported. Through the cut 22 of each cutting wire 31 arise at adjacent edge regions of the bands 10 ' melting edge 24 , These are rough and hard because of the melting thread material, but are in the smoothing device 30 aftertreated while smoothing at the edges. In the present case, the smoothing takes place by utilizing a longitudinal tension of the fabric, as in the DE 196 44 534 C2 is described in detail.

As 3 shows, includes the smoothing device 30 two fixed deflection links 32 . 33 that have a gap between them 34 lock in. The deflecting links 32 . 33 have a diverter 36 or two deflection points 35 . 37 through which the melt edges 24 be treated. In the illustrated embodiment, the one deflection 36 Convex formed and between the other two deflection 35 . 37 from the counterpressure member 33 arranged. Between the two deflection points 35 . 37 there is a concave depression 38 into which the convex deflection point 36 of the upper pressure member 32 intervenes. The Breitbahn 10 and the resulting bands 10 ' are under a longitudinal tension, that of the trigger unit 40 is produced. Because the turning points 35 . 36 . 37 not only in the transport direction 23 but also offset in height direction to each other, takes place in the smoothing device 30 an aftertreatment of the soft melt edges still deformable by the melt cut 24 the bands 10 ' instead, because this treatment takes place shortly behind the heated cutting wires 31 instead of. As a result of these post-treatments, the edges of the melt are "ironed out" and initially lead to a satisfactorily soft strip precursor 10 ' ,

The strip precursor 10 ' goes through on the device 20 but still a deduction unit 40 to which a deduction tree 42 essentially belonging to the mentioned transport 23 the broadway 10 or the bands 10 ' leads. The peripheral surface 44 the trigger tree 42 is with roughness 45 provided for a slip-free transport of the tapes 10 ' in the deduction unit 40 serve. The appearance of the roughness is schematic in 4 shown an enlarged section of the deduction tree 42 from 2 shows.

In the deduction unit 40 is the deduction tree 42 a first guide roller 41 upstream of which the bands 10 ' on the rough peripheral surface 44 the trigger tree 42 directs. At the exit of the trigger unit 40 there is a second guide roller 43 , While the first guide roller 41 at a distance from the circumference 44 the trigger tree 42 can be arranged, the latter, the output side guide roller 43 as by the power arrow 46 in 2 illustrated, against the peripheral surface of the trigger tree 42 be loaded with force. In addition, it is recommended that the peripheral surface of the guide roller 43 also to provide with roughnesses, the said slip-free transport 23 the bands 10 ' through the deduction unit 40 are beneficial. The deduction tree 42 and who pressed against it 46 output-side deflection roller 43 generate over their transport 23 the required high longitudinal tension in the belts 10 ' , the Breitbahn 10 when weaving and the warp threads 11 before weaving. That's both for separating the wide web 10 on the cutting wires 31 and the aftertreatment on the smoothing tool 30 meaningful, as well as for one directly at the deduction tree 42 successful heat setting 47 important.

The later to be described end product 10 ''' which is the deduction unit 40 leaves, can be under a much lower longitudinal stress, which is sufficient to the tape end products 10 ''' on a cloth tree 39 wind. This further movement 23 can by means of conveyor rollers 57 get supported.

The before and behind the deduction tree 42 seated guide rollers 41 . 43 determine at the peripheral surface 44 the trigger tree 42 the out 2 apparent wrap area 29 the bands 10 ' , This will make the bands 10 ' in the field of heat setting 47 through the roughness 45 at the extent 44 the trigger tree 42 reliably positioned.

For heat setting 47 serves a Andruckglied 48 , which has a heated pressure surface 49 has. The profile of the pressure surface 49 is the scope 44 the trigger tree 42 customized. The between the Andruckglied 48 and the deduction tree 42 steady-state continuous bands 10 ' obtain a heat treatment by ironing, which leads to the effects already mentioned in the band material. The peripheral surface 44 the trigger tree 42 should be as unyielding as possible, in order to ensure a shelf-stable shape of the tapes 10 ' in heat setting 47 to obtain; the pressure area of the Andruckglied 48 at the trigger tree 42 acts as an abutment for the arrow 50 in 2 clarified the pressure of the pressure element 48 ,

The roughness 45 on the peripheral surface 44 the trigger tree 42 may consist of elevations and / or depressions with respect to an ideal cylindrical surface. Decisive for the invention, it is in an average particle size 28 form at the most equal to 50 microns. The easiest way to use for such roughness 45 the grits of an abrasive paper 26 with which the unyielding peripheral surface 44 the trigger tree 42 is covered. 5 shows, not to scale, but on a large scale, a portion of such abrasive paper 26 , On a sheet-shaped carrier 27 the grain size of the aforementioned size is applied, which according to the FEPA list corresponds to a grain size of P240. Abrasive papers with a grain size of P320 according to the FEPA-P list have proven particularly suitable, which means an average particle size 28 of 46 microns. Otherwise, tape end products result 10 '' bad quality, as based on the 6 will be explained in more detail.

6 shows, in a greatly enlarged section, the conditions as they are in the heat setting 47 at the trigger tree in the prior art. In 6 is only the upper zone of a wearer 27 ' an abrasive paper 26 ' illustrates on which on the outwardly facing active surface, the particles 25 ' the grain sit. Of that related to 2 described Andruckglied 48 will also in the case of 6 a band 10 '' pressed. In the area of the cut edge shown there cut 24 ' the following result 6 apparent conditions.

The dash-hatched enamel material 52 the edges 24 ' Softens under heat of heat setting 47 that there by wavy arrows 56 is illustrated, and is by the illustrated by means of arrows Andruckkraft 50 ' in the gaps 51 between the particles 25 ' pressed. The melting material penetrating there 52 creates a material mountain range 53 with a contour 54 the complementary to the roughness profile 55 of the abrasive paper 26 ' is. This is the already mentioned "signet ring effect" in heat setting 47 recognizable as it results in the prior art. The roughness profile 55 of the perimeter 44 the trigger tree 42 sitting abrasive paper 26 ' imprints itself as a positive counter profile with the contour 54 in the softened edges 24 ' one. After leaving the place with heat setting 47 hardens the contour 54 in the band 10 '' out. This results in undesirably hard and therefore rough edges 24 ' at the edges of the band 10 '' , The already satisfactory in terms of softness and goodness bands 10 ' before heat setting 47 worsen in the prior art again; the known bands 10 '' are worse in terms of softness than the previous tape precursor 10 ' , This is avoided in the present invention.

As already stated above, the invention has recognized that the deterioration of the known bands 10 '' their cause in the too high particle size 28 ' the grains used 25 ' or roughness on the circumference 44 the trigger tree 42 Has. The invention, in contrast, in connection with 5 explained minimum particle sizes 28 the grits 25 in front. It was surprisingly found that because of the smaller particle size 28 not only roughness profiles of lesser height result, but that the resulting minimum gaps between the proposed small grain sizes 25 the softened melting material 52 the ligaments no longer penetrate into these gaps. Thus, in the invention, a band end product 10 ''' that is practically no material mountains 53 at the melting edges 24 produces and therefore a very flat and thus soft contour 54 at the melting edges 24 generated.

In the invention, the strip precursor 10 ' after passing through the heat-setting 47 not only optimized in terms of format and tape quality, but wins in the end product 10 ''' at its edges 16 an even greater softness. This gives a perfect, optimal end product 10 ''' , which is characterized in the application as a label tape because of its softness by particularly pleasant properties when wearing the garments provided with it. The strip quality of the final product 10 ''' has over the precursor 10 ' significantly improved.

As already mentioned, the minimum roughness also has 45 at the extent 44 the trigger tree 42 also in the invention the task for a proper positioning of the bands 10 ' during heat setting 47 to care. Otherwise, the interaction between the trigger tree functioning as an abutment would be 42 on the one hand and the heated pressure surface 49 the thermofixing pressure member 48 on the other hand. Therefore, the particle size should be 28 the roughness 45 not less than 15 microns. Unless you have this roughness 45 by using abrasive paper 26 generated, the latter means that the grain on the sandpaper 26 should be less than or equal to P1200. This corresponds to a particle size of about 15 microns.

As can already be seen from the subclaims, the web or technical production of the wide web can occasionally also take place independently of the heat setting outside the device according to the invention. Then the device according to the invention serves for the aftertreatment of such otherwise produced bands 10 ' ,

LIST OF REFERENCE NUMBERS

10

Wide web (FIGS. 1, 2)

10 '

Strip precursor (FIGS. 1, 2)

10 ''

Prior Art of the Tape End Product (FIG. 6)

10 '' '

Inventive strip end product (FIG. 2)

11

thread material

12

Web site (Fig. 1)

13

Width of 10 (Fig. 1)

14

Weft thread (Fig. 1)

15

Back of 10 respectively. 10 ' (Fig. 1)

16

Show side of 10 respectively. 10 ' (Fig. 1)

17

Pattern on 10 respectively. 10 ' (Fig. 1)

18

Vertical stripes of 17 on 10 (Fig. 1)

19

Space between 18 (Fig. 1)

20

Device (Fig. 2)

21

Initial range of 10 (Fig. 2)

22

Separating cut in 10 For 10 ' (Fig. 1)

23

Arrows of the transport direction of 10 . 10 ' . 10 ''' (Fig. 1, 2)

24

Melting edge (Fig. 1)

24 '

Melting edge at 10 '' (Fig. 6)

25

Grain of 26 (Figures 4, 5)

25 '

known particles of grain size (FIG. 6)

26

Inventive sandpaper for 42 (Fig. 5)

26 '

known sandpaper (Fig. 6)

27

Carrier of the grain (FIG. 5)

27 '

Carrier for 25 ' (Fig. 6)

28

Particle size of 25 (Fig. 5)

28 '

Particle size of 25 ' (Fig. 6)

29

Wrapping area of 10 ' at 42 (Fig. 2)

30

Smoothing device (FIGS. 2, 3)

31

Cutting wire from 30 (Fig. 2, 3)

32

upper pressure member of 30 (Fig. 3)

33

lower counterpressure element of 30 (Fig. 3)

34

Gap between 32 . 33 For 10 . 10 ' (Fig. 3)

35

first deflecting stele 33 (Fig. 3)

36

convex deflection point 32 (Fig. 3)

37

second deflection point 33 (Fig. 3)

38

Hollow in 33 (Fig. 3)

39

Goods tree for 10 ''' (Fig. 2)

40

Trigger unit for 10 ' (Fig. 2)

41

input-side deflection roller of 40 (Fig. 2)

42

Trigger tree (Fig. 2. 3)

43

Output-side deflection roller (FIG. 2)

44

Peripheral surface of 42 (Fig. 2)

45

Roughness 42 (Figures 4, 5)

46

Power arrow for 43 bezügl. 42 (Fig. 2)

47

Submission for heat setting (FIG. 2)

47 '

Field of known heat-setting (FIG. 6)

48

Pressing member of 47 (Fig. 2)

49

Pressure surface of 48 (Fig. 2)

50

Pressure arrow of 48 (Fig. 2)

50 '

Pressure area in 47 ' (Fig. 6)

51

Gap between 25 ' (Fig. 6)

52

Melting material of 24 ' (Fig. 6)

53

Material mountain profile at 24 ' (Fig. 6)

54

convex contour of 53 (Fig. 6)

55

Roughness profile of 25 ' . 26 ' (Fig. 6)

56

Heat flow arrow of thermofixing of 10 '' (Fig. 6)

57

Conveyor rollers for 10 ''' (Fig. 2)

Claims (11)

Device for thermosetting ( 47 ) of preferably patterned ribbons ( 10 ' ), especially of label tapes made of a meltable material ( 52 ) having broad web ( 10 ) are produced, wherein the broad web ( 10 ) preferably consists of a woven or knitted fabric with meltable thread material, the wide web ( 10 ) in the desired places ( 19 ) by means of a fusion cutter, in particular a heated cutting wire ( 31 ) in adjacent bands ( 10 ' ) and the bands ( 10 ' ) Melting edges ( 24 ), with at least one deduction tree ( 42 ) deduction unit ( 40 ) for the bands ( 10 ' ), which are part of the subtraction tree ( 42 ), whose peripheral surface ( 44 ) unyielding and with roughness ( 45 ) intended for slip-free transport ( 23 ) of the bands ( 10 ' ) in the zone of its heat-setting ( 47 ), and heat-setting ( 47 ) of the bands ( 10 ' ) a heated pressure surface ( 49 ) of a pressure element ( 48 ) in the wrapping area ( 29 ) of the bands ( 10 ' ) against the peripheral surface ( 44 ) of the trigger tree ( 42 ), which during the heat-setting ( 47 ) acts as an abutment, characterized in that the roughness ( 45 ) on the peripheral surface ( 44 ) of the deduction tree ( 42 ) consist of elevations and / or depressions having an average particle size ( 28 ) of less than or equal to 50 microns. Device according to claim 1, characterized in that the mean particle size ( 28 ) of the elevations or depressions greater than or equal to 15 microns is formed. Device in which the roughness 45 on the peripheral surface ( 44 ) of the deduction tree ( 42 ) by grains ( 25 ) of an abrasive paper ( 26 ), which at the periphery of the trigger tree ( 42 ), according to claim 1 or 2, characterized in that the abrasive paper ( 26 ) a grain ( 25 ), which according to the FEPA P-list is numerically greater than or equal to P240. Apparatus according to claim 3, characterized in that the grain ( 25 ) of the abrasive paper ( 26 ) is formed numerically greater than / equal to P320. Device according to one or more of claims 3 to 4, characterized in that the abrasive paper ( 26 ) a grain ( 25 ) formed according to the FEPA P-list numerically less than / equal to P1200. Apparatus according to claim 5, characterized in that the grain ( 25 ) of the abrasive paper ( 26 ) is formed numerically smaller than / equal to P1000. Device according to one or more of claims 1 to 6, characterized in that the device comprises a device ( 20 ) for weaving or working the wide web ( 10 ) from the thread material ( 11 . 14 ) contains. Device according to claim 7, characterized in that the device comprises a device ( 20 ) for cutting the broad web ( 10 ) in bands ( 10 ' ) and such fusion cutters in particular from cutting wires ( 31 ) consist. Apparatus according to claim 8, characterized in that in the device behind the fusion cutters, but before the pressure member ( 48 ) of heat-setting ( 47 ) of the bands ( 10 ' ), An institution ( 30 ) for smoothing the ribbon melting edges ( 24 ) is arranged. Device according to one or more of claims 1 to 9, characterized in that the withdrawal unit ( 40 ) at least one guide roller ( 41 . 43 ), which encloses the wrapping area ( 29 ) of the bands ( 10 ' ) on the subtraction tree ( 42 ) certainly. Apparatus according to claim 10, characterized in that the deflection roller ( 43 ) on the output side, that is, behind the deduction tree ( 42 ), and in turn provided with roughnesses, that the deflection roller ( 43 ) against which the deduction tree ( 42 ) wrapping tapes ( 10 ' ) loaded with force ( 46 ) and that the roughness of the guide roller ( 43 ) on the one hand and the roughness ( 45 ) of the deduction tree ( 42 ) on the other hand, the bands ( 10 ' ) between themselves.

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