FI90523C - Device for separating the partial webs - Google Patents

Description

90523

Device for separating the sub-webs Anordning f6r separering av delbanor

The invention relates to a device for separating sub-webs, which device comprises a first, curved, pydriva roll arranged on one side of the web and a second, curved, pydrivå roll arranged on the opposite side of the web and a flip-flop mechanism adapted to act on said rollers to make a difference for the sub-webs.

By separating the sub-webs, the aim is to separate, for example, the different strips of the web cut with a slitter with a lateral distance far enough apart to ensure that the rollers are separated from each other. In the separation of the sub-webs, the aim is to carry out the lateral displacement of the web so as to prevent the web from sliding sideways in the applicator member, guiding the web with the first applicator member, folding sideways and returning in the second direction. As is known, rods, beams or rotating roller casings mounted on a curved shaft are used, for example, as the spreading means. The rotating roll shell can be, for example, assembled from rigid shell elements or uniform and elastic. Sheath elements can be. . myds separate. However, it is often a problem with a circumferential jacketed spreader that the direction of movement of the web and the hydrogenation vector describing the rotation of the rotating roller jacket are oblique to each other at least at some point in the jacket. The TallOin is bleached into the web by a force component which tends to slide by moving the web on the roll shell in an axial direction corresponding to its longitudinal direction.

The separation gap of the sub-webs is known to be obtained either by changing the curvature of the web, by changing the choice of rollers or by the choice of application members or by changing the angle of refraction of the web. If the size of the spreading gap is adjusted by changing the distance between the spreading members, this affects the the size of the machine and thus the possibility of using this is complicated. If receivables based on changing the curvature precipitation are used in the separation of the sub-webs, the use of this method of precipitation is very precise, since even a small change in the curvature of the rain strongly affects the distance between the sub-webs.

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The most common way to obtain the size of the separation gap of the sub-webs is to do it by adjusting the angle of refraction of the track over the spreading members. In this case, the track makes either a steeper or a slower angle as it passes through the spreading members, whereby the distance between the sub-webs changes.

When the bending angles of the track of the spreading devices are changed, the directional angles of the myds arcs with respect to the track change. A change in the direction of the arc with respect to the track causes the track rolling component to be lateral, which causes problems because the sliding frictional force between the web and the spreading rollers causes disturbances in the application. As is well known, heading angles have been obtained manually, which is slow and cumbersome.

The object of the invention is to provide a device for separating the partial webs in which the above-mentioned factors do not cause a problem, since the correction of the directional angle is mechanically forced.

In order to achieve the above and more apparent targets, the device according to the invention is mainly characterized in that the device has a mechanism adapted to correct the directional angle between said rolls and web as desired with all values of the angle of refraction to induce circulation. . in the opposite direction to the two in the geometric relationship defined by the mechanism.

By means of the device according to the invention, the directional angles between the arcs of the application members and the web are automatically correct when the bending angles of the web are obtained when the application rate is increased or decreased.

In the following, the device according to the invention will be described in more detail with reference to the figures of the accompanying drawing.

Figure 1 schematically shows the principle of a folding spreader seen from below.

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Figure 2 schematically shows the principle of folding application and its control quantities in a side view.

Figure 3 schematically shows a device according to the invention,

Fig. 1 shows schematically how the cut partial webs W1 (W2 .. .Wn.1 (Wn) come to the first spreading roll 10 in the direction in which the jacket of the roll 10 rolls directly in the direction P of the web W. The subwebs Wj ^.. Fig. 2) wraps around the first roll 10 in the rolling direction R10 while folding the outlet, each subweb W: .., Wn in its own direction P1 (P2 ... Pn. The slits C open between the subwebs Wx .., Wn. Each subweb Wx ... Wn enters the other on the roll 11 in the rolling direction Rn of the jacket, turning with the jacket in the original straight direction P. The sub-webs Wj ... Wn detach from the second spreading roll 11 and the sub-webs have the necessary separation slots C.

Figure 2 shows schematically the quantities affecting the folding application. In the figure, the track is denoted by the reference mark W, which track passes under the first spreading roller 10 as its arc 10 'spreads into the web webs W1 ... Wn. Subareas Wj ,. . .Wn then pass over a second spreading roller 11, the arc 11 'of which wraps around the sub-webs WL. . .Wn in its original direction of travel P (Fig. 1). In the figure, the radii of curvature of the spreading arcs 10 ', 11' are denoted by the reference numerals r1, r2. The distance between the spreading rollers 10,11 is indicated by reference numeral 1. The bending angles of the track W over the rollers 10,11 are indicated by reference numeral b1 (b2 and the directional angles of the spreading arcs 10 ', 11' with respect to the path W are indicated by and g2.

Figure 3 schematically shows an embodiment of the invention applied to a carrier roller cutter 20. The web U is introduced in a manner known per se under the guidance of guide rollers 31,32,33 into a device according to the invention, from which the partial webs are guided in this embodiment to a carrier roll cutter 20 by a first roll 21 and a second roll 22 to be rolled into a roll 23. In this example two curved, rotating rollers 10.11 and a flip-flop mechanism 15,16,17. The guide mechanism 12,13 corrects the directional angle g1, g2 of the rotating, curved rollers 10,11 (Fig. 2) when the spread of the flip-flop mechanism 15,16,17 is desired. The spreading or separation is effected by means known in the art by rotating the piece 15 around the joint 17 by means of the jack 16, whereby the bending angles b1, b2 around the rolls 10,11 of the paper web W increase or decrease.

According to Figures 1, 2 and 3, the device comprises a first, curved, rotating roll 10 arranged on one side of the web W and a second, curved, rotating roll 11 on the opposite side of the web W. The device also comprises a flip-flop mechanism 15,16,17 acting on the rollers 10,11 to change their angle of refraction b1, b2 and thus to achieve the desired difference C on the subwebs W2 ... Wn. The device is fitted with a harvesting mechanism 12,13, which corrects the direction angle g1, g2 of the rollers 10,11 and the web W. This conveying mechanism 12,13 can be formed e.g. from the articulated levers 12,13 as shown in Fig. 3. Direction angles gx, g2 are obtained by means of the articulated levers 12,13 such that the directional angles gl, g2 with respect to the path W are always constant, preferably 90 °. The rollers 10,11 used as spreading means may be roller rolls or may be solid, curved rollers or the like.

The device according to the invention is suitable for use in separating sub-webs of different web materials. The web material may be plastic film, fabric, paper, sheet metal, cardboard or other similar material.

The invention has been described above only with reference to a preferred application example thereof. However, it is not intended to limit the invention in any way to this example, but many modifications and variations are possible within the scope of the inventive idea defined by the following claims.

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Claims (2)

5,90523 A device for separating sub-webs (WlfW2... W ^^ W ,,), the apparatus comprising a first, curved, pydriva roll (10) arranged on one side of the web (W) and a second one arranged on the opposite side of the web (W), a curved, pydriva roll (11) and a flip-flop mechanism (15,16,17) adapted to act on said rollers (10,11) to change the bending angles (blfb2) of the sub-webs (Wi, W2... Wn.jW ,,) and thus to the desired to provide a difference (C) for the sub-webs (W1, W2..., Wn), characterized in that the device has a transmission mechanism (12, 13) adapted to correct the orientation angle between said rollers (10, 11) and the web (W); (g1, g2) at all values of the refractive angle (blfb2) such that the transmission mechanism (12,13) is adapted to deflect said rollers (10,11) in a direction opposite to the pivoting movement (12,16,17) of the transmission mechanism (12). , 13) in a defined geometric relation. Device according to Claim 1, characterized in that the transmission mechanism (12, 13) is formed by articulated levers. 6 90523