FI92682C - The applicator roller - Google Patents

Description

92682

A spreader roll

The present invention relates to an application roller for guiding materials or raw materials in the form of a web of material.

According to DE-GM 85 06 704, such an application roller is provided with a support roller on which a deformable application roller coating having a substantially lithium-shaped circumferential surface is placed. From the circumferential surface of the spreading roller baling, the annular cuts extend at an angle of more than 90 ° to the longitudinal central axis 1 of the support axis.

This roller is suitable for a wide variety of applications, of which the following are a few examples:

The paper industry, the textile industry, the plastics industry, the leather industry and, in general, mechanical engineering.

The deformable spreading roller coating is then made mainly of natural rubber or other types of rubber.

This known roll has proven to be quite reliable in practice and has hitherto been used mainly for so-called

"Banaanitelana". This is a roll formed outwardly curved like a banana, these rolls being divided into individual deformable parts, whereby such a roll, when passed through a web of material, can be provided with a substantially cylindrical part-shaped surface cross-section.

Since these banana rollers do not require much maintenance, it is not necessary to continuously adjust the roll known from DE-GM 85 06 704. This saves time and costs in connection with their manufacture.

2,92682

However, it has been found that even such a roll can be further improved, in particular - depending on the application - in terms of the spreading effect of the roll in its edge region. In this case, the aim is to optimize the design of the roll so that the web of material passing through the roll comes as evenly as possible against the surface of the roll, which can only be achieved in part in connection with currently known rolls by means of annular cuts of mainly trapezoidal cross-section.

The present invention is based on the finding that in connection with the deformation of the cut surfaces of the known rolls, a partial flattening of the lamellar parts between these cuts can take place, whereby As a result, the roll surface is pressed against the material to be processed applied to it, and on the other hand, even in this case, the outer edge area of the material cannot always be spread out optimally.

The present invention now provides the use of guides for materials in the form of a web of spreading roller, this roll being provided with a support shaft to which a deformable spreading roller headform with a predominantly cylindrical circumferential surface 89 is attached to it. parallel to the mirror image up to the axial center of the applicator roll coating from either end of the roll, with at least one application of the applicator roll coating: one half having a different depth compared to the other cuts.

In one preferred embodiment of the invention, the angle below which the cuts are to pass is 30 to 60 °, and preferably 40 to 50 °.

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Dividing the roll into a mirror image of the right and left halves is important because it is only in this way that it can be ensured that the web of material passed through the roll is spread evenly on the left or right side, respectively.

The cutting depth of the individual cuts can be adjusted depending on the particular application, and according to a preferred embodiment, the cuts in the vicinity of each end of the spreading roll coating are made deeper than the cuts in the middle of the spreading roll cover. In this way, the advantage is obtained that the outer cuts can better deform in both the radial and axial directions at both free ends, whereby the spreading effect of the roll on the material in this area becomes more efficient.

This effect can be further enhanced when the cuts are provided at the open ends on the circumferential surfaces with a smaller opening width than at the ends facing the support shaft. In this case, the cut 11a can be, for example, almost! trapezoidal cross-sectional shape.

In this way, the advantage is obtained that the relevant lamqas lamellae extend in this region perpendicularly with respect to the support shaft .. due to the force exerted by the tension of the material web on the spreading roller relatively further towards the corresponding end of the support shaft, thereby also becoming a spreading effect.

In the case of the characteristic • ·:: feature formed by a greater depth of cut, the respective annular lamellae appear to extend longer or are in their base area where they join the uncut part of the coating, slightly less stable than when the cut is 11 base parts correspondingly thicker ·: why. According to the field of application, this embodiment 92682 also falls within the scope of the invention.

Different cutting depths are determined in a way depending on the purpose of use of the roll. According to the invention, it is thus proposed to step the cutting depths mainly towards each free end of the roll, whereby the spreading roll can possibly be divided into several different sections, each of the different sections having several sections of the same depth. However, it is particularly advantageous when the cutting depth between the individual annular lamellae increases from the central part of the roll as it passes to both ends. The roll is then generally usable, above all, in connection with applications in which several parallel strips of material must be passed simultaneously over the roll.

For this purpose, a further preferred embodiment is proposed according to the invention, in connection with which the roll is formed in such a way that it comprises a plurality of parts corresponding to the number of strips of material passing therethrough, each such part being made as a roll according to the invention. Such a roll then comprises a plurality of rollers according to the invention connected in succession in the axial direction.

In this way, it is first possible to pull a wide one-piece strip-web in the direction of the roll and divide it into individual strips only shortly before the roll, for example via a suitable cutting device. Each strip will then, as described above, be moved only to pass: through the corresponding roll part and also spread to the right and left.

Such a "multi-roll" is suitable for use, for example, in transferring a web of paper, which, shortly before the roll, is divided into individual web webs, which are then wound on a cardboard core for the production of toilet paper rolls 92682.

In addition, it has been found that the design of the roll in terms of its holding capacity as a whole can also be optimized so that the bases of the sections closest to the support shaft and furthest from the support shaft form the imaginary center surface of the spreading roller coating. the "average cutting depth" extends approximately to the average thickness of the spreading roller coating.

The characteristics of the characteristic 11 described above result in a spreading roller, the operating characteristics of which even exceed the corresponding properties of the roll according to DE-GM 85 06 704; which has a better spreading effect and can be used more easily for different applications. In addition, the roll according to the invention can be used to optimize the desired possible wide-area control of the web of material passing therethrough, in particular will be described in more detail below with reference to the accompanying drawings.

This effect can also be controlled by the choice of coating material, so that the annular cuts are formed with respect to each other in such a way that the cut extends so far towards the center of the roll that the front facing the center of the roll extends beyond the corresponding end , which will also be described in more detail below with reference to the accompanying drawings.

Other characteristic features of the invention will become apparent from the subclaims as well as from other explanatory material.

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The invention is described below with reference to the accompanying drawings, in which:

Figure 1 shows a partially sectioned side view of a spreading roller according to the invention, and

Figure 2 shows a partial view of a roll provided with a plurality of parallel webs.

The spreading roll according to the invention is indicated in its entirety by reference numeral 10. This roll comprises a support shaft 11 and a rubber spreading roll coating of thickness D fixed to it. However, any of the above materials may be selected as the coating material.

The support shaft 11 is made cylindrical and extends at its head 13 over both sides of the coating 12, the heads 13 acting as normal vertical bearings for bearing the roller, for example on radial rolling bearings.

The circumferential surface 14 of the spreading roller 10 is made mainly cylindrical, however, it includes intersections 15 at axial distances. In this case, the thickness D of the roll becomes divided into The half-height 12 corresponding to its central plane is indicated in Fig. 1 by a dashed line 26.

Reference numeral 18 denotes the (imaginary) radial center plane of the roll 10.

The middle plane 18 forms a "mirror surface", i. the roll 10 comprises, in addition to the right-hand part shown in Fig. 1, its left-hand part in a mirror image. The roll will be described below with its right-hand part, so that its ··· properties can be transferred like a mirror image to the 92682 also on the left-hand half.

However, it is still necessary to describe the area immediately to the right and left of the middle plane 18, which in the embodiment shown in Fig. 1 is shaped in a special way. Namely, the roller 10 comprises in this region a cylindrical part 20 ', next to which a radially extending groove 21 is formed.

Between this radial groove (radial section) 21 and the right end 12 'there are four annular sections 15', 15a, 15b, 15c spaced apart at axial distances.

In this case, the annular section 15 'has a parallelepiped-shaped cross-section, while the other sections 15a, 15b and 15c again have substantially semi-parallelepiped-shaped cross-sections, the sections having a smaller opening width at the open end at the circumferential surface than (marked with the number b).

Thus, the lamellar portion 20a passing between the sections 15 'and 15a has a greater circumference at the circumferential end in the axial direction than at its end towards the support shaft 11.

In addition, it can be seen from Figure 1 that the annular section 15a has a smaller depth than the section 15b, which in turn has a smaller depth than the section 15c, so that overall the depths of the sections 15a, 15b, 15c increase from the middle plane 18 to the right end 12 '.

A different cross-sectional shape of the section 21 or section 15 ', respectively, compared to sections 15a, 15b, 15c is shown in the figure for observing the cross-sectional shapes proposed in accordance with the invention alone. Thus, of course, sections 21 and 15a, 15b and 15c could also be made. at an angle to the support shaft 11, but with a parallelepiped-shaped cross-section.It is also possible to give the section 15 'or 21, respectively, a cross-sectional shape corresponding to the sections 15a, 15b, 15c.

However, according to the invention, it is important that one or more cuts have a different depth than the other cuts, so that in the embodiment shown in Fig. 1 the cutting depths increase in a preferred manner as they go to the edge (12 ') of the spreading roller.

It can also be seen from Figure 1 that the circumferential annular sections 15a, 15b, 15c and - in a corresponding embodiment, of course also the sections 15 'and 21 - are formed so that these sections overlap with each other, which will be described in more detail below in the section 15. 15a. It can be seen from the figure that the lower end of the section 15b beyond the central plane 18, denoted by the reference number 15b ', extends further in the direction of the central plane 18 than the upper right of the section 15a, indicated by the reference number 15a'.

In addition, it should be noted once again that the circumferential surfaces of the lamellar parts are made distinct, which can be easily seen in connection with the lamella 20 and, above all together with the characteristics of the trapezoidal cuts 15a, 15b, 15c, lead to the respective surface portions of the lamellae after the corresponding deformation at the moment when the web of material is directed to pass through the roll, extend so far to that end of the roll that they are moved opposite to each other, resulting in an almost closed cylindrical surface, the diameter of the Lier ion thus formed being slightly smaller than 2. diameter of the support shaft 11.

92682 This coating arrangement is further improved by the fact that the individual lamellae change shape more easily in their base parts due to the smaller cross-section than in the case of previously known embodiments.

As can still be seen in Figure 1, the (imaginary) differential surface 26 is located exactly between the bottom of the groove of section 15a and the bottom of the groove of section 15c, which is advantageous according to the invention, since the roll flexibility (deformability) is fully preserved and the roll is stabilized.

Here, the distance between the bottom of the groove of section 15a and the bottom of the groove of section 15c is marked by the distance dimension delta x.

The compression pressure caused by the web of material passed through the roll is caused by the tension of the web and occurs at the points where the web is entwined with the spreading roll 10. The tangle any folds and wrinkles that may occur can be spread evenly. Thanks to the high coefficient of friction of the elastomer of the roll coating tea, • · · safe and even control of the material web is guaranteed.

The roll coating formed according to the invention can also be placed on the support shafts of currently known rolls.

* · * The sections 15a, 15b, 15c shown in the figure are at an angle of 38 to 45 ° to the support axis 11, the surfaces (e.g. 15c ”) facing said end portion * (12 ') extending at an angle of 45 ° to the longitudinal center axis of the support axis 11, 18 while the surfaces (e.g. 15c ') pass at an angle of only 38 °, the lamellae (e.g. 25) between them 92682 obtaining the trapezoidal cross-section described above or a correspondingly tapered base.

In particular, the cut adjacent to the part 20 '(in this case 21) must, of course, be shaped so as not to cut the part 20', which according to the invention can be carried out particularly advantageously so that the cut is additionally provided at a greater depth at each end.

Finally, it can still be seen from Fig. 1 that the outer part 24 is without 1 father cut. Of course, a section running from the end surface can also be formed, but in general the embodiment shown is sufficient, firstly because it is additionally provided with only a small edge portion for good deformation and secondly because the web passing through the roll is generally slightly wider than the roll.

Fig. 2 shows a partial view of the spreading roll 10 'only in a schematic manner, however, the structure of this roll is in accordance with the embodiment shown in Fig. 1. Tåmån applicator roll 10 'is traversed by the material web 27 of the arrow 28 direction, but when the web is cut off before the roller rolling pelkåståån discoidal schematically shown the cutting blades 29 vålityksellå four yksittåiseen to the web 30, 31, 32, 33. The cutting blades 29 of the rotary shaft 34 is indicated by numeric columns, numeral 34.

The webs of material are wound on the spreading roll 10 ', for example over the circumferential area 35 of the spreading roll 10', in which case spreading or axial displacement of the strips 30, 31, 32, 33 may also occur.

Assuming that the strip 30 passes in the central region 20 'of the spreading roller 10', then the passage of this strip 30 takes place in a straight line as shown in the figure. The axial transfer of the strips * 31-33, i.e. 92682 to the right in Fig. 2, is performed by means of the increasing spreading effect of the roll 10 ', i.e. the strip 32 moves more towards the right-hand roll end 19 or 12 ', respectively, than the strip 31, while the strip 33 moves more than the strip 33.

This is due to the flexibility of the annular lamellae 20 ', 20a, 20c towards the roller end 19 and / or the corresponding design of the annular lamellae. As the strips 31, 32, 33 move towards the roll end 19, the increased spread or deviation, respectively, is shown in the figure as a greater deflection of the edges 31 ', 32', 33 'towards the roll end 19.

The application example shown in Fig. 2 can also be modified by placing a plurality of spreading ditches according to Fig. 1 on an adjacent passing shaft body 11, whereby the web 28 is cut by the window blades 29 before entering the spreading roll 10 'into four separate webs 30, 31, 32, 33. , which are then applied to the right and left, ensuring only that the cutting of the webs 30, 31, 32, 33 takes place in such a way that they do not overlap one another in the direction of the axis of the support shaft 11 after application.

Claims (7)

1. Beam roll for guiding web-shaped material, with a strut shaft (11), a deformable width-trimming coating (12) fixedly mounted on the strut shaft (11) with substantially cylindrical casing surface (14), from which annular notches (151, 15a, 15b, 15c ) obliquely against the strut shaft (11) and the mirror symmetrical relative to the axial plane (18) of the longitudinal pavement coating (12), wherein at least one of the notches (15 ', 15a, 15b, 15c) in each half of the pavement coating pavement (12) has a from the other notches differing depths, characterized in that the notches (15a, 15b, 15c) have less width (a) with their spirits open to the mantle surface than at their closest angles (b). 2. Roll according to claim 1, characterized in that the notches (15a, 15b, 15c) in two-section are approximately trapezoidal. Roll according to claim 1 or 1, characterized in that the notches (15 ', 15a, 15b, 15c) are at an angle between 30 and 60 ° relative to the strut shaft (Π). Roll according to any one of claims 1 to 3, characterized in that the notches (IS ', ipa, 15b, 15c) are at an angle between 40 and 50 ° relative to the bearing shaft (s). 5. A roller according to any one of claims 1 to 4, characterized in that the notches (15c, 15b) closest to the respective breath (12 ', 12 ") of the latitudinal cover (12) have greater notch depths than the notches (15b, 15a). which is closest to the median plane (18) of the latitudinal roller (12). 6. A roller as claimed in claim 5, characterized in that the notches (15 \ 15a, 15b, 15c) fire with increasing depth between the median plane (18) of the long-haul coating (12) and the respective spirit (12 '. 12 "). 7. A roller according to any one of claims 1 to 6, characterized in that the closest bottom to the strut shaft (1) and the notch bottom (11) situated between them encloses a thin surface (26) which is approximately at the center of the longitudinal pavement (1). 12) thickness.