DE2338446A1 - EMBOSSING CALENDAR FOR THERMOPLASTIC FILM OR COMPOSITE WEB - Google Patents

Description

for thermoplastic FoT i en- or no

Di ° ^ rf in ^ uno · b ° draws ς i «uf» iripn pre τ ^ ka "! Other for

stisch ⁰ Foil or composite webs with a 7.7. ^ 1 indpr as well as (= in ^ r prep-e- and one of these zup-eord-

pnvalze, the heating cylinder being adjustable with its counterpart towards and away from the cylinder on the rollers 7U and away from them or the pre-roller '= ^1.

Such calenders are known.

Erfindung- for its object to provide such a Kalandpr and sided with devices through the calender welehe an extended application receives, so that it and foil> ^r arenbahnen for laminating, coating, thermoplastic extension or thermo-elastic stretching of thermoplastic in a Operation with the embossing is applicable. The aim is to create a universal calender on which the above-described operations can be carried out, with one or more of the above-mentioned operations being able to be combined with one another.

In addition, the calender should be used for both thin as well as for

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thick thermoplastic film and composite webs may be suitable, and also both front and front the back of the calender can be loaded.

To solve this problem, the invention provides a Embossing calender of the type described above, in which, in addition to embossing, lamination, lamination such as thermoelastic stretching and thermoplastic drawing of a composite material or a film web between the Heating cylinder and the embossing roller and its counter roller at least two jointly adjustable in height and width, with the same or different from each other and with respect to the heating cylinder with the same as with higher peripheral speed rotatable take-off rollers are arranged, of which one opposite the other is also laterally adjustable.

At a higher peripheral speed of the first take-off roller compared to the heating cylinder, there is the possibility of pulling out between this and this take-off roller perform thermoplastic area of the film or composite web, as well as the thermoelastic Stretching, as explained later, is then preferably carried out between the heating cylinder and the first take-off roller.

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Di r »TTt νΓτπρτ; n-er; rh ^T - ^r in <ii gkeitruntprFohi ^ d ^ between d h ° i", Z ¹⁷ I i.ndpr and dpn deduction ^ valzpn land between these can lmi.ir retention of the respective gear dn ^ ch / 'fine T) ur>rh' ^T iPss ^o rp Ποτ- falzen pr ^f ol ρ · ρπ, E ° i irrrißpr ^r -n · '"" ^{/ l} bzu ^{(: r} r; ^T - ^r nl2 ^o n becomes their test dip: keit proR ^ r, with an -,. rnn ^ unp "runinpf ^ r · v ^ l zpn, dpren Umfpn ^ pgpRfhvindi rV ^ it kl piTir-r - to drive the deduction bugs vqi7 ° n Fvnohron and for λ te deduction bugs a ° n

to '<"h" i ρπ.

Tn ν · οΐΐρτ · «τ · Än ^ biidunp · the invention are the T, aP" er in two side highpn and side verse + .elibaren

P "PlaP" ert and dip T, ap: er pjne dpr two ^ ^r «lzen in Schild in, ie ρι'ηρτη Tängpn

a particularly advantageous embodiment of the Invention is a third, with the two deduction tools füpich ^ r odpr different peripheral speed Wa] z ° n revolving deduction points assigned, yrobei die in Drpipckform with the heating cylinder turned away

The shields are leather- covered and the bottom take-off roller is adjustable in width in the height and side adjustable reeds. It has d ^ hpr the option sheet or web for the various operations wahivpise to pine or swalzen several Abzu ^ and thereby lead over untprschiedliche ways and wrap around the Walzpn 7M ". Also, according to another particularly advantageous Au S ^ ⁿ pt al tune: the invention of the bearing shields around their

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Center in the Kaianderstanderη rotatable and fixable be. Here, too, all of the take-off rollers have a common drive, one of the take-off rollers despite their lateral ones Adjustability, e.g. connected to one of the other driven take-off rollers by means of a gear drive.

In order to obtain perfect embossing of the film or the composite material web, there are preferably between the lower take-off roller and the embossing roller with its counter roller laterally adjustable heating elements are arranged in such a way that the heating elements can optionally be brought into effect. While it is sufficient with thin foils if they are directly from the Take-off rollers are guided into the embossing gap, it is necessary for thicker foils or extensive guidance of the Foil webs or composite webs around two or all of the take-off rollers in large wrap-arounds from the previous heating of the web material before entering the nip.

Since the calender according to the invention offers the possibility of using both thick-walled film material and composite material Even thin-walled material has to be embossed with guide rollers on the front as well as on the back of the calender arranged for film or individual webs of the composite web. There is therefore no need to transfer thin web material across the calender or over a long distance into the feed nip between a feed roller and the heating cylinder. Such extensive guides of thin film webs always have the disadvantage of wrinkling and warping

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the film web.

ku £ the drawing are shown embodiments and application examples of the parts of the calender according to the invention

B ¹ Ig. 1 a heating cylinder and three take-off rollers arranged in a shield, the film web being drawn out between the heating cylinder and the first take-off roller in the thermoplastic area and preferably stretched between this cylinder and this roller.

Fig. 2 shows the lamination of, for example, a textile web with a thermoplastic one Film web, the film being embossed after the lamination of the textile web.

3 shows the lamination of a film web with a substrate, with then the substrate is embossed.

4 shows the processing of a thin film web without heating in front of the embossing gap,

5 and 6 the drawing out or stretching with the aid of two of three take-off rollers

7 and 8 show particular guides for the film web around the take-off rollers.

The calender according to the invention has a heating cylinder 1 of suitable width which is directed in the direction of the double arrow 2 is adjustable in height. At the front of the calender there is a guide roller 3 over which the to be treated

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Foil web 4 is directed to the Aufheiζylinder 1, which is in Direction of arrow 5 is rotated. Below the Heating cylinder 1 are side shields 6 in the Kal- anderntender, which in the direction of d ^ s horizontal Dopnel-Ofelües 7 as well as the vertical Dormel arrow β adjustable and around the intersection of the two Donpp] arrows walking axis can be rotatable. Both shields are coupled to one another in such a way that they are both height and height laterally adjustable or rotatable together and have a diamond-shaped shape, where they are in the vicinity of their longer Base side two bearings 9,10 located at the same height for the axes for, ie carry a take-off roller 11,12. (The simplicity For the sake of this, the camps and valley men are shown as a full circle)

Both take-off rollers are via gears 13,14 with the same Drivable speed, the rollers 11,12 against thinner or thicker rollers are interchangeable, so that there is a speed difference on the circumference of the rollers 11,12. The gears can also be changed, so that a difference in peripheral speed occurs in this way how the speed difference between the rollers 11, 12 can also be achieved in other ways. Independent The two rollers 11, 12 are also of this different speed between the two rollers 11, 12 can be varied with respect to the circumferential speed of the heating cylinder 1, i.e. the rollers 11, 12 can operate at the same speed like the heating cylinder, but also

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with different peripheral speed compared to the The heating cylinder can be rotated.

Parallel to the narrower one in Fie. 1 lower side of the shields (~ ->, an elongated bearing eye 15 runs, which also runs parallel to the connecting line of the bp.ideri bearings 9,10 of the axes of the folds 11.1 °. In these bearing eyes of the shields 6, the axes or the bearings 16 of a third take-off roller, so that the roller 17 can be displaced from its position on the shield 6 on the right in FIG. 1 into the position on the shield on the left in FIGS The two ends of the roller axis are shifted synchronously.

The neck of the roller 17 carries a drive gear 18 which can be brought into engagement either with the drive gear 14 of the roller 12 or with the drive gear 13 of the roller 11. As a result, not only can the direction of rotation of the roller 17 be changed for the various purposes, but also different types of wrapping and insole angles of the foils of the material web k between the take-off swalen can be achieved. The roller 17 can also be rotated at the same speed tip of its circumference or at a different circumferential speed.

The adjustment path of the Aufhei ζ cylinder 1 wife also the shields

the roller 17

Is chosen so that between / the embossing roller 19 and its Gpgen- ? Π, dip d <=> n PrSgespalt? 1 form, a heating unit "+ odpr - can be pushed. This is towards

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of the arrow 23 and opposite to this adjustable, so that you can choose between the last take-off roller 17 and the Roll gap 21 extending web 4 in section 40 can be approached or removed from this.

In the embodiment of the device according to FIG. 1 and the type of looping around the heating cylinder 1 and the take-off rollers 11, 12, 17 through the film web 4, occurs at a higher circumferential speed of the heating cylinder 1 between the point 24 the heated web leaves the heating cylinder 1 more awake, and the take-off roller 11 thermoplastically pulling out the film web.

On the roller 11, which is arranged opposite the cylinder 1, that the web of film or composite material is as small as possible free distance, preferably a fraction of 1/4 to 1/12 of the Has to cover cylinder diameter between this and the roller 11, there is a stabilization of the thermoplastically drawn Web instead of, between the rollers 11 and 12 is at Synchronization of the rollers of the same size, maintaining the speed of the film or material web and the stabilizing effect supported on the roller 12.

The thermoelastic stretching preferably takes place between heating cylinders 1 and the first take-off roller, here roller 11 instead, because on this smallest free distance through the thermoelastic Stretching of the film causes the smallest transverse contraction of the film. But it can also be desirable that To make stretching of the film between the individual take-off rollers.

In order to bring the film to the necessary embossing temperature, the heating device 22 is opposite to the direction of the

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Arrow 23 so approximated to the web that the Heating device facing surface of the film web or Composite web receives the necessary embossing temperature.

With the arrangement of the take-off rollers 11, 12, and 17 according to FIG. 2, In turn, a film web 4 is passed over the guide roller 3 onto the heating cylinder 1. Via another feed roller 30, a web of material 31 to be laminated rests on the film 4 brought to cylinder 1. The one consisting of the film 4 and the material web 31, e.g. a textile material web Composite web 32 runs over the roller 11, 12 and 17, which in this case for the purpose of laminating the web 31 in the Their circumference is synchronized with the heating cylinder 1 circulate. The take-off rollers can also have a greater peripheral speed than the heating cylinder 1, so that a stretching or pulling out of the composite material web 32 occurs The rollers 11, 12 therefore form an intimate bond between the elements to be laminated Material web 31 and the film 4 reached, including especially the large changing angle of wrap of the composite material web contributes both rollers 11, 12 by preventing the material web from slipping and providing an additional stretching effect. That During lamination, stretching produces such an intimate bond between the two thermoplastic material webs as it is would not be thermally attainable. The composite web 32 is guided over the take-off rollers 11, 12, 17 in such a way that the outer, i.e. in Fig. 2 between the take-off roll 17 and the nip 21 on the right-hand side of the film web 4 of the embossing roll 19 facing, is arranged in front of a heating element, not shown is.

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The calender according to the invention has a guide roller 3 both on its feed side and an identical guide roller 33 on the opposite rear side (FIGS. 3, 6, I ₁ ). A film web 4 can likewise be brought from this onto the cylinder 1, the roller 17 with its bearings in the elongated bearing eyes 15 being displaced into the left-hand position shown in FIG. 3. There is therefore the option of feeding a thick or a thin film web to the heating cylinder 1 from one of the two sides.

In addition to the guide roller 33, a roller 30a corresponding to the guide roller 30 is located on the rear side of the calender in FIG. 3 present, the substrate 31a and then the film 4 being placed on top of these guide rollers as the first web for lamination will. According to the illustration, the substrate 31a wraps around the embossing roller 19. The stretching during the lamination takes place does not contribute to such an intimate bond as with lamination.

In the position of the AufheiζZylinders 1 and the take-off rollers

on

11, 12, 17 according to FIG. 4, is / is a looping of the in the running direction the film web 4 dispensed with the first roller. However, this can optionally come into contact with the aid of the adjustment of the shield 6 be brought with the film web 4 on the heating cylinder 1 or at a distance therefrom. In Fig. 4 is also shown that the film web 4 is introduced into the nip 21 after leaving the roller 17 without intermediate heating can.

However, if necessary, at the level of the last take-off roll 17 and / or between this roll and the nip A larger heating element 34 can also be used

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is adjustable in the direction of arrow 35 and in the opposite direction. As a result, the film web 4 can already be between the Take-off rollers 11 and 17 as well as between the last-mentioned roller and the nip 21 are heated to embossing temperature, In this type of wrapping around the take-off rollers 11 and 17, which is brought into their left-hand position in FIG. 5, the film web lies 4 in the roller gap 21 with the side with which it rested on the heating cylinder 1 against the counter roller 20. With help of the heating element 34 can also be the side facing away from this film web side and the web side facing the embossing roller 19 can be heated as desired.

In the embodiment of FIG. 6, the diameter of the rollers 12 and 17 can be slightly different so that the The circumferential speed of the roller 17 is greater than that of the roller 12. Here, a stretching is carried out between the rollers 12 and 17 in the thermoelastic state of the film web, as is the case between the rollers 11, 12 and 17 when the film web is guided and roller circumferential speeds according to FIGS. 1-4 is the case. Between the roller 17 and the embossing roller 19 can again be a Heating element 22 find application.

7 and 8 show a possibility of processing the film web 4, in which this essentially only by one single take-off roller, namely the take-off roller 12 or 17 wraps around and from there either under the action of heat of the heating element 36 or, as shown in FIG. 8, is guided directly into the nip 21. Between the heating cylinder 1 and the take-off roller 71, the film web can touch the roller 12.

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Claims (1)

ij embossing calender for thermoplastic film or composite webs with a heating-up cylinder and a prefabricated unit the associated counter roller, in front of the heating cylinder towards the roller and away from it or the embossing roller with its counter roller towards or from the cylinder is continuously adjustable, characterized in that for lamination, lamination and for stretching and pulling out one Composite product or film web between the heating cylinder (1) and the embossing - (19) and its counter roller (20) at least two jointly adjustable in height and laterally, with one another same or different and compared to the heating cylinder (1) with the same as with a higher peripheral speed rotatable take-off rollers (11 or 12, 17) are arranged, one of which (17) opposite the other (11 or 12) is also laterally adjustable. 2. Embossing calender according to claim 1, characterized in that the bearings of both rollers (11 and 12, 17) in lateral height and laterally adjustable end shields (6) are mounted and the
the bearings (16) of one / two rollers in the shield (6) in elongated bearing eyes (15) are adjustable. 3. Embossing calender according to claim 2, characterized in that the two take-off rollers have a third one with the same peripheral speed revolving take-off roller (12 or 11) is assigned, the rollers in a triangular shape with the heating cylinder (1) facing away from the triangle tip stored in the shields (6) 509807/0961 M.nd and di ° lower take-off roller (17) in the shields (6) can be adjusted is. &. Embossing calender according to Claim 3, characterized in that the bearing frame (6) around its center in the calender stands are rotatable and fixable. 5. embossing calender according to claim 4, characterized in that between the lower take-off roller (17) and the embossing roller (19) are arranged with their counter roller (20) laterally adjustable heating elements (22). 6. embossing calender according to claim 5, characterized in that on the front as well as on the back of the calender Guide rollers (3,33) for film or single webs of the composite web are arranged. 7. embossing calender according to claim 6, characterized in that the take-off roller (11,12,17) have a common drive or are connected to one another in terms of drive. R. embossing calender according to claim 7, characterized in that the take-off rollers (11, 12, 17) to change their peripheral speed can be exchanged for thinner or thicker folds in a known manner. 9. Embossing calender according to claims 1-8, characterized by such an arrangement of the first take-off roller (1.1 or 12) the heating cylinder (1) that the film or composite web covers the smallest possible free path between the cylinder (1) and the roller (11 or 12). 509807/0961