METHOD AND DEVICE FOR PRODUCING A ROLL MADE OF A DOUGH PIECE AND A SEPARATOR SHEET

Abstract

A method for producing a roll made of a dough piece and a separator sheet includes feeding the dough piece onto a separator sheet web moved in a conveying direction; cutting-to-length the separator sheet web to form a separator sheet which is assigned to the dough piece and has a front edge in front of the dough piece and a rear edge behind the dough piece, the separator sheet protruding from below the dough piece at the front edge and/or the rear edge with a front protrusion and/or a rear protrusion; rolling up the separator sheet with the dough piece to form the roll; wherein a separator sheet web is used which has a residual-stress state, the residual stress of the separator sheet web causing the cut-to-length separator sheet to roll up automatically at the front edge and/or the rear edge after termination of the cutting-to-length process.

Claims

1. A method for producing a roll made of a dough piece and a separator sheet, comprising: a) feeding the dough piece onto a separator sheet web moved in a conveying direction; b) cutting-to-length the separator sheet web to form a separator sheet which is assigned to the dough piece and has a front edge in front of the dough piece and a rear edge behind the dough piece , the separator sheet protruding from below the dough piece at the front edge and/or the rear edge with a front protrusion and/or a rear protrusion; c) rolling up the separator sheet with the dough piece to form the roll; wherein a separator sheet web is used which has a residual-stress state, the residual stress of the separator sheet web causing the cut-to-length separator sheet to roll up automatically at the front edge and/or the rear edge after termination of the cutting-to-length process.

2. The method according to claim 1, wherein the front edge of the separator sheet comes to rest on the upper side of the dough piece by rolling up automatically after termination of the cutting-to-length process, the front protrusion of the separator sheet being folded over the front edge of the dough piece when the roll is rolled up.

3. The method according to claim 2, wherein the rear protrusion of the separator sheet envelops the roll made of the dough pieceand the separator sheet on the outside and serves as a fixing element for fixing the roll.

4. The method according to claim 1, wherein a distance is formed in the conveying direction between the separator sheets arranged one after the other by the automatic rolling up of the separator sheet at the front edge and/or at the rear edge.

5. A device for producing a rolled up roll made of a dough piece and a separator sheet, having a feeding device in which the dough piece can be placed on a separator sheet web in the conveying direction, a cutting-to-length device by means of which the separator sheet web can be cut-to-length into individual separator sheets, each of which is assigned to a dough piece, and a winding device by means of which a roll made of a dough piece and a separator sheet can be rolled up; wherein the device comprises an impact device by means of which the residual-stress state of the separator sheet web can be varied, the residual stress of the separator sheet web generated in this way causing the separator sheets to roll up automatically at the front edge and/or the rear edge after termination of the cutting-to-length process.

6. The device according to claim 5, wherein the impact device comprises a traction conveyor device and a deflection device, wherein tensile stresses can be exerted on the separator sheet web by means of the traction conveyor device, and wherein the separator sheet web, which is under tensile stress, can be deflected at the deflection device by a deflection angle.

7. The device according to claim 6, wherein the deflection angle of the deflection device is between 90 degrees and 179 degrees.

8. The device according to claim 6, wherein the traction conveyor device comprises a pair of draw rollers disposed downstream of the deflection device in the conveying direction, the separator sheet web being able to be conveyed through said pair of draw rollers by applying a driving force.

9. The device according to claim 6, wherein the traction conveyor device comprises a braking means disposed i upstream of the deflection device in the conveying direction, the conveying movement of the separator sheet web being able to be decelerated by means of said braking means.

10. The device according to claim 9, wherein the braking means is formed like a shaft brake by means of which a bearing shaft, on which a supply roll of the separator sheet web is rotatably mounted, can be decelerated.

11. The device according to claim 6, wherein the deflection device is formed like a deflection bar which comes into contact with a deflecting edge at the separator sheet web.

12. The device according to claim 11, wherein the deflection device engages with a wedge-shaped deflecting edge at the separator sheet web.

13. The device according to claim 5, wherein the cutting-to-length device is formed like a bar knife.

14. The device according to claim 5, wherein the device comprises an adjustable holding-down device which can be adjusted between an engaged position and a rest position, the holding-down device coming into contact with the rear protrusion of the separator sheet in the engaged position, and the holding-down device allowing the dough piece to be conveyed through to the winding device in the rest position.

Description

[0023] An embodiment of the disclosure is schematically illustrated in the drawing and will be explained in more detail below.

[0024] FIG. 1 shows a perspective top view of a device for producing a roll made of a dough piece and a separator sheet;

[0025] FIG. 2 shows a side view of the device according to FIG. 1;

[0026] FIG. 3 shows an enlarged side view of the deflection device according to FIG. 1;

[0027] FIG. 4 shows the separator sheet web conveyed by the device according to FIG. 1 with the dough pieces resting on it in the area of the cutting-to-length device before the cutting-to-length process is performed;

[0028] FIG. 5 shows the separator sheet web with the dough pieces resting on it according to FIG. 4 when the cutting-to-length device is put down on the separator sheet web;

[0029] FIG. 6 shows the separator sheet web according to FIG. 5 with the dough pieces resting on it after the cutting-to-length process has been performed by means of the cutting-to-length device;

[0030] FIG. 7 shows an enlarged side view of the winding device of the device according to FIG. 1 at the beginning of the process of rolling up a roll.

[0031] FIG. 8 shows an enlarged side view of the winding device according to FIG. 7 at the end of the process of rolling up a roll.

[0032] FIG. 9 shows an enlarged side view of the winding device according to FIG. 7 after termination of the process of rolling up a roll.

[0033] FIG. 10 shows an enlarged side view of the roll made of a dough piece and a separator sheet, which has been rolled up according to the manner shown in FIG. 7 to FIG. 9.

[0034] FIG. 1 shows a device 01 for producing rolls 02 (see FIG. 10), each roll being made of one dough piece 03 and one separator sheet 04. The dough pieces 03, which, for example, can be pizza dough or cake dough, having been conveyed by means of a conveying device 05, are transferred to a feeding device 06. In the feeding device 06 the dough pieces 03 are placed on a separator sheet web 07 fed from below, which, for example, can be baking paper material.

[0035] After the dough pieces 03 have been placed on the separator sheet web 07, the separator sheet web 07 is subsequently cut-to-length by means of a cutting-to-length device 08, which is formed like a bar knife, to thereby form separator sheets 04 which are assigned to the individual dough pieces 03.

[0036] Before feeding the separator sheet web 07 to the feeding device 06, said separator sheet web 07 is deformed in an impact device 09 in such a manner that a predetermined residual-stress state is generated in the separator sheet web 07 in the conveying direction. The impact device 09 essentially comprises a bearing shaft 10 provided with a shaft brake, on which a supply roll 11 of the separator sheet web 07 is rotatably mounted, two deflection rollers 12 and 13, a deflection device 14 designed as a deflection bar and a pair of draw rollers 15. The separator sheet web 07 is pulled from the supply roll 11 and conveyed in the direction of the feeding device 06 by means of the pair of draw rollers 15. At the same time the bearing shaft 10 can be decelerated by a controlled braking means so that the separator sheet web 07 has a predetermined tensile stress between the supply roll 11 and the pair of draw rollers 15. By means of this tensile stress the separator sheet web 07 is deflected around the defection device 14 at a deflection angle 30 of approximately 140 degrees and thereby a residual-stress state is generated which causes the unstressed separator sheet web 07 to roll up automatically. In other words, due to the tensile stress and the deflection angle, the separator sheet web 07 is curled by the deflection device 14 in a manner which causes the unclamped separator sheet web to roll up.

[0037] Due to the residual-stress state generated by the impact device 09, the separator sheets 04 roll up both at the front edge and at the rear edge after the cutting-to-length process has been performed by means of the cutting-to-length device 08 and with each of their cutting edges come to rest on the upper side of the dough pieces 03. This is further explained below with reference to the drawings FIG. 4 to FIG. 6. Subsequently, the dough pieces 03 with their assigned separator sheets 04 are rolled up in the winding device 16 to form rolls 02 and can then be conveyed to a packaging station by means of a conveyor belt 17.

[0038] FIG. 2 shows a side view of the device 01.

[0039] FIG. 3 shows an enlarged view of the deflection device 14. It can be seen that the deflection device 14 engages with a wedge-shaped deflecting edge 27 at the separator sheet web 07 over the entire width.

[0040] With reference to the drawings FIG. 4 to FIG. 6, the method according to the disclosure shall be further explained. The transfer point for the transfer of the dough pieces 03 from the feeding device 06 to a downstream conveyor belt 20 is situated below the cutting-to-length device 08. In the process state shown in FIG. 4, the cutting-to-length device 08 still is at a distance above the separator sheet web 07 and the separator sheet web 07 is conveyed in the conveying direction 21 with the dough pieces 03 resting on it.

[0041] FIG. 5 shows the cutting-to-length device 08 during the cutting motion in the actuating direction 25 shortly before cutting through the separator sheet web 07 at a predetermined position. The length of the front protrusion 22 and of the rear protrusion 23, with which the separator sheet 04 protrudes at the front or at the rear with respect to the dough piece, after termination of the cutting-to-length process, is visible.

[0042] FIG. 6 shows the dough pieces 03 and the separator sheet web 07 after the cutting-to-length process has been performed by means of the cutting-to-length device 08. The front protrusion 22 of the separator sheet 04 rolls over the front edge 18 of the dough piece 03 because of the residual-stress state generated in the separator sheet web 07 by means of the impact device 09 so that the front edge 19 of the separator sheet 04 comes to rest on the upper side of the dough piece 03. At the same time also the rear protrusion 23 of the preceding separator sheet 04 rolls up. As a result, due to the rolling up of the separator sheet 04 at the front edge 19 and the rear edge 24, a distance 29 is formed between two separator sheets 04 arranged one after the other so that it is possible to work with a higher conveying speed. Furthermore, the rolling up of the protrusions 22 and 23 caused by the residual stress of the separator sheet web 07 prevents the cutting edges 19 and 24 of the individual separator sheets from moving uncontrolledly during the process following the cutting-to-length process, in particular during the rolling up of the rolls 02, and thereby from causing disruptions.

[0043] FIG. 7 shows an enlarged side view of the winding device 16 at the beginning of the process of rolling up a roll 02. The beginning of the process of rolling up a roll 02 can be seen. At the beginning of the rolling up process, the front edge 18 of the dough piece 03 is rolled up together with the separator sheet 04 lying below it to form the core of the roll 02. Thereby, the front edge 19 of the separator sheet 04 protrudes over the front edge 18 of the dough piece 03 and rests on the upper side of the dough piece 03. The protrusion of the separator sheet 04 is placed on the upper side of the dough piece 03 by the rolling up of the roll 02 so that the front edge 18 of the dough piece 03 is enveloped by the front protrusion 22 of the separator sheet 04. Thus, uncontrolled movements of the front edge 19 of the separator sheet 04 are avoided and technical disruptions due to inadmissibly deformed separator sheets 04 are avoided.

[0044] A holding-down device 28, which serves to unroll the rolled up rear protrusion 23, is in its pivoted back rest position so that the dough piece 03 can be conveyed into the winding device 16.

[0045] FIG. 8 shows the winding device 16 at the end of the process of rolling up the roll 02. As soon as the dough piece has completely been conveyed into the winding device, the holding-down device 28 is pivoted downward and thereby prevents the rolled up rear protrusion 23 from being drawn in. The rear protrusion 23 is drawn through between the upper strand of the conveyor belt 20 and the tip of the holding-down device 28 and is unrolled thereby.

[0046] FIG. 9 shows the winding device 16 after termination of the process of rolling up the roll 02. The winding device 16 opens toward the bottom and the roll 02 which is fully rolled and fixed in its shape falls down onto the conveyor belt 17.

[0047] FIG. 10 shows the roll 02 made of a dough piece 03 and an assigned separator piece 04, which has been rolled up in the winding device 16. The front edge 18 of the dough piece 03 forms the core of the roll 02, the front edge 18 being flashed by the front protrusion 22 of the separator sheet 04.

[0048] After the roll 02 has been rolled up, the rear protrusion 23 envelops the entire roll 02 in an additional winding layer so that the roll 02 is fixed in its shape by the protrusion 23 wrapped around it.