EP1052209A1 - Foil cutting assembly, in particular for a wrapping machine - Google Patents
Foil cutting assembly, in particular for a wrapping machine Download PDFInfo
- Publication number
- EP1052209A1 EP1052209A1 EP99830271A EP99830271A EP1052209A1 EP 1052209 A1 EP1052209 A1 EP 1052209A1 EP 99830271 A EP99830271 A EP 99830271A EP 99830271 A EP99830271 A EP 99830271A EP 1052209 A1 EP1052209 A1 EP 1052209A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- knife
- fixed knife
- stop element
- assembly according
- axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D7/2628—Means for adjusting the position of the cutting member
- B26D7/265—Journals, bearings or supports for positioning rollers or cylinders relatively to each other
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
- B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
- B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
- B26D1/38—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member
- B26D1/385—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member for thin material, e.g. for sheets, strips or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D7/2628—Means for adjusting the position of the cutting member
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
- B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
- B65H35/08—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators from or with revolving, e.g. cylinder, cutters or perforators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2402/00—Constructional details of the handling apparatus
- B65H2402/60—Coupling, adapter or locking means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/21—Angle
- B65H2511/214—Inclination
Definitions
- the present invention relates to a foil cutting assembly, designed in particular to carry out a cut at regular intervals on a film of plastics material which is movable from a roll towards a wrapping station.
- a cutting assembly including a fixed knife and a rotating knife, cooperating with each other for cutting at a predetermined intervals a foil passing through such knives.
- the knives comprise respective blades which interfere with each other and the blade of the rotating knife during its rotating movement cooperates with the blade of the fixed knife, so as to cut the foil in a direction transversal to the direction of movement of the foil.
- Cutting assemblies of this type can operate both with thin bimetallic blades and with normal blades.
- the object of the present invention is to provide an improved cutting assembly which overcomes such problems.
- this object is achieved by a cutting assembly having the features forming the subject of the main claim.
- the numeral reference 10 indicates a cutting assembly intended to cut at regular intervals a foil of plastics material 12 coming from a roll 14.
- the foil 12 passes between a pair of unwinding rollers 16 and through the cutting assembly 10 which cuts the foil in a direction orthogonal to the direction of movement thereof.
- the cut is interrupted in some points for forming continuity zones between the section of the foil upstream and downstream of the transversal cutting line.
- the foil 12 is grasped along its longitudinal edges by a known dragging device 18 including, along each edge of the foil, a pair of belts 20 which drag the foil 12 in the direction indicated by the arrow A.
- the cutting assembly 10 comprises a rotating knife 22 rotatable about an axis orthogonal to the direction of movement of the foil 12.
- the rotating knife 22 is rotated by and electric motor 24 by means of a flexible transmission member 26 formed, for instance, by a toothed belt or by a chain.
- the rotating knife 22 cooperates with a fixed knife 28 which is associated with a mechanism 30 for adjusting the interference between the knives 26, 28.
- the cutting assembly 10 is carried by a fixed support structure including a pair of sturdy lateral shoulders 32 parallel to each other.
- the rotating knife 22 comprises a beam 34 with a rectangular cross-section, on which a blade 36 is fixed by means of screws 38 (figure 3).
- the beam 34 is rotatably carried by the shoulders 32 by means of roller bearings 40.
- the blade 36 of the rotating knife 32 is formed by a thin steel lamina which is mounted on a helically shaped surface of the beam 34.
- the flexible blade 36 assumes therefore the same shape of the helical surface against which it is pushed by the screws 38.
- the fixed knife 28 comprises a support 42 having a tubular shape. On the outer, surface of the support 42 a flat surface is formed, on which a blade 44 is fixed by means of screws 46.
- the support 42 of the fixed knife 28 is connected to the shoulders 32 by means of roller bearings 48 which permit the rotation of the fixed knife 28 about an axis 50 parallel to the axis of rotation of the rotating knife 22.
- the axis of rotation 50 is preferably eccentric with respect to the axis of the tubular support 42.
- the bearing 48 on the right side is carried by an intermediate support element 52 having a portion 54 coaxial with the axis 50, on which a plate 56 is rotatably mounted.
- the portion 54 has a circumferential groove 58 on its outer surface, which is engaged with play by the end of a screw 60 carried by the blade 56.
- the screw 60 and the circumferential groove 58 serve to connect the plate 56 to the intermediate support element 52 leaving however the plate 56 free to rotate about the same axis 50 about which the fixed knife 28 is rotatable.
- the plate 56 carries a stop element 62 formed by a block projecting from a lateral surface of the plate 56 (figure 2).
- the plate 56 and the stop element 62 form part of the adjustment device 30 which varies the interference between the blade 36 of the rotating knife 22 and the blade 44 of the fixed knife 28.
- the adjustment device 30 further comprises a tie rod 64 articulated to the plate 56 about an axis parallel to said axis 50 about which the plate 56 is rotatable.
- the tie rod 64 has a threaded portion 66 which engages a nut 68 having a hexagonal portion which can be engaged by a spanner.
- the nut 68 is free to rotate about its own axis inside a bush 70 which is articulated to the shoulder 32 about an axis parallel to the articulation axis of the other and of the tie rod 64.
- the hexagonal portion of the nut 68 is placed in correspondence with an elongated aperture 72 formed in the shoulder 32, through which a spanner can be inserted for rotating the nut 68. It will be understood that the rotation of the nut 68 produces the rotation of the plate 56 about its own axis of rotation 50 and such rotation modifies the angular position of the stop element 62.
- a locking device 74 including a tie rod 76 having a square or hexagonal head 78 which engages without possibility to rotate an elongated seat 88 formed in the plate 56.
- the tie rod 76 extends through a slot 82 formed in the shoulder 32 and through a bush 84.
- the end of the tie rod coming out from the bush 84 engages the nut 86 of a locking and unlocking lever 88.
- the lever 88 By rotating the lever 88 in the direction corresponding to the tightening of the nut 86 on the tie rod 76, the head 78 of the tie rod rests against the bottom wall of the seat 80 and pushes the plate 56 against the shoulder 32 thereby locking the plate 56 against rotation.
- the lever 88 When an adjustment has to be carried out, the lever 88 is rotated in the direction corresponding to unscrewing the nut 86 from the tie rod 76 and in this manner the pressure pushing the plate 56 against the shoulder 32 is eliminated. After having unlocked the plate 56, it is possible to vary its angular position by acting on the nut 68.
- the head 78 of the tie rod 76 remains stationary inside the seat 80 but does not obstruct the rotation of the plate 56 by virtue of the elongated shape of the slot 82.
- the adjustment device 30 comprises a fluid actuator 90 which constantly pushes the support 42 of the fixed knife 28 against the stop element 62.
- the actuator 90 has a first end 92 articulated to the shoulder 32 and a second end 94 articulated to a flange 96 fixed to the support 42 and radially projecting therefrom.
- the actuator 90 applies a force to the flange 96 tending to maintain the flange 96 constantly in contact with the stop element 62.
- the adjustment device 30 comprises a second stop element 98 fixed to the shoulder 32, which defines an inoperative position of the knife 28 which is particularly useful for carrying out the replacement of the blade 44.
- the plate 56 In normal operating conditions of the cutting assembly 10, the plate 56 is locked against the shoulder 32 by means of the locking device 74.
- the actuator 90 pushes the flange 96 against the stop element 62 and maintains the knife 28 in a fixed angular position.
- the blade 38 of the rotating knife 22 contacts the blade 44 of the fixed knife 28 during each rotation of the rotating knife 34, thereby producing the transversal cut of the foil 12 which moves between the two knives.
- the flexibility of the blades 36 and 44 permits to the knives 22 and 28 to operate in conditions of mutual interference. However, such interference produces a wear of the blades which requires a periodic adjustment of the interference between the knives.
- the operator unscrews the locking device 74 and rotates the nut 68 by means of a spanner.
- Such rotation of the nut 68 produces, as previously disclosed, a rotation of the plate 56 which varies the angular position of the stop element 62.
- the actuator 90 automatically pushes the fixed knife 28 against the stop element 62 while it moves to the new position. Therefore, the fixed knife 28 rotates about the axis 50 of an angle equal to the angular movement of the plate 56.
- the rotation of the knife 28 produces a variation of the interference conditions between the blade 36 and 44. When the desired interference conditions are reached, the adjustment is finished and the blade 56 is locked in the new position by means of the locking device 74.
- An important feature of the present invention consists in that the adjustment operation previously disclosed can be carried out also when the machine is running. Therefore, the result of the adjustment can be immediately perceived by the operator in terms of quality of the cut. As soon as the quality of the cut reaches the desired level, the operator has a confirmation of the fact that the adjustment has been correctly carried out. Therefore, the adjustment operation does not involve a stop of the machine and can be carried out very rapidly even by operators not particularly skilled.
- a second particularly important feature is that the adjustment device including the tie rod 66, the plate 56 and the eccentric support 28 permits micrometric movements of the blade 44 and gives a very high adjustment precision.
- the machine When the blade 44 must be replaced, the machine is stopped and the actuator 90 is brought in a retracted position in which the flange 96 abuts against the second stop element 98.
- the fixed knife moves therefore to a position in which the replacement of the blade 44 can be carried out much more easily.
- Figure 6 shows a variant of the cutting assembly according to the invention, in which the elements corresponding to the ones disclosed above are indicated by the same numeral references.
- the fixed knife 28 carries a second flange 100 opposite to the first flange 96.
- the actuator 90 has been moved on the opposite shoulder 32 and has a first end 92 articulated to the shoulder 32 and a second end 94 articulated to the second flange 100.
- the fixed knife 28 is subject to a torsional load produced by the force of the actuator 90 which acts on the stop element 62 carried by the first flange 56.
- the torsional load on the fixed knife 28 compensates possible plays.
- the assembly according to the invention could be provided with two actuators placed in correspondence with both ends of the fixed knife 28.
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Cutting Devices (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
Abstract
- a fixed knife (28) and a rotating knife (22), having respective blades (44, 36) cooperating with each other, and
- adjustment means for varying the interference between the fixed knife (28) and the rotating knife (22).
Description
- The present invention relates to a foil cutting assembly, designed in particular to carry out a cut at regular intervals on a film of plastics material which is movable from a roll towards a wrapping station.
- A cutting assembly is known, including a fixed knife and a rotating knife, cooperating with each other for cutting at a predetermined intervals a foil passing through such knives. The knives comprise respective blades which interfere with each other and the blade of the rotating knife during its rotating movement cooperates with the blade of the fixed knife, so as to cut the foil in a direction transversal to the direction of movement of the foil. Cutting assemblies of this type can operate both with thin bimetallic blades and with normal blades.
- One of the main problem of the cutting assemblies of this type is represented by the fact that during operation the blades wear out because of the reciprocal contact. Such wear compromises the cutting efficiency of the assembly and for maintaining constant the cutting quality it is necessary to periodically adjust the interference between the blades of the knives.
- In the known solutions, the adjustment of the interference between the blades is a very complex and delicate operation which requires a particularly skilled operator and can be carried out only when the machine is not operating.
- The object of the present invention is to provide an improved cutting assembly which overcomes such problems.
- According to the present invention, this object is achieved by a cutting assembly having the features forming the subject of the main claim.
- Characteristics and advantages of the present invention will become clear in the course of the detailed description which follows, given purely by way of non-limiting example, with reference to the attached drawings, in which:
- figure 1 is a lateral schematic view of a cutting assembly according to the present invention,
- figure 2 is a partial perspective view showing the adjustment device of the cutting assembly according to the invention,
- figure 3 is a cross-section ta-ken along the line III-III of figure 2,
- figure 4 is a partially sectioned front view taken along the arrow IV of figure 2,
- figure 5 is a partially sectioned plan view taken along the arrow V of figure 2, and
- figure 6 is a partial perspective view showing a variant of a cutting assembly according to the invention.
- With reference to figure 1, the
numeral reference 10 indicates a cutting assembly intended to cut at regular intervals a foil ofplastics material 12 coming from aroll 14. Thefoil 12 passes between a pair ofunwinding rollers 16 and through thecutting assembly 10 which cuts the foil in a direction orthogonal to the direction of movement thereof. In a way per se known, the cut is interrupted in some points for forming continuity zones between the section of the foil upstream and downstream of the transversal cutting line. Downstream of thecutting assembly 10, thefoil 12 is grasped along its longitudinal edges by a knowndragging device 18 including, along each edge of the foil, a pair ofbelts 20 which drag thefoil 12 in the direction indicated by the arrow A. The continuity zones which join to each other the adjacent sections of thefoil 12 are torn downstream of thecutting assembly 10 for forming individual sections of wrapping foils which are fed to a wrapping machine. The way in which the single section of the foil are torn is per se known and does not fall in the scope of the present invention. Referring always to figure 1, thecutting assembly 10 comprises a rotatingknife 22 rotatable about an axis orthogonal to the direction of movement of thefoil 12. The rotatingknife 22 is rotated by andelectric motor 24 by means of aflexible transmission member 26 formed, for instance, by a toothed belt or by a chain. The rotatingknife 22 cooperates with afixed knife 28 which is associated with amechanism 30 for adjusting the interference between theknives - With reference to figure 2 to 5, the
cutting assembly 10 is carried by a fixed support structure including a pair of sturdylateral shoulders 32 parallel to each other. The rotatingknife 22 comprises abeam 34 with a rectangular cross-section, on which ablade 36 is fixed by means of screws 38 (figure 3). Thebeam 34 is rotatably carried by theshoulders 32 by means ofroller bearings 40. Theblade 36 of the rotatingknife 32 is formed by a thin steel lamina which is mounted on a helically shaped surface of thebeam 34. Theflexible blade 36 assumes therefore the same shape of the helical surface against which it is pushed by thescrews 38. - The
fixed knife 28 comprises asupport 42 having a tubular shape. On the outer, surface of the support 42 a flat surface is formed, on which ablade 44 is fixed by means ofscrews 46. Thesupport 42 of thefixed knife 28 is connected to theshoulders 32 by means ofroller bearings 48 which permit the rotation of thefixed knife 28 about anaxis 50 parallel to the axis of rotation of the rotatingknife 22. The axis ofrotation 50 is preferably eccentric with respect to the axis of thetubular support 42. As shown in particular in figures 4 and 5, thebearing 48 on the right side is carried by anintermediate support element 52 having aportion 54 coaxial with theaxis 50, on which aplate 56 is rotatably mounted. Theportion 54 has acircumferential groove 58 on its outer surface, which is engaged with play by the end of ascrew 60 carried by theblade 56. Thescrew 60 and thecircumferential groove 58 serve to connect theplate 56 to theintermediate support element 52 leaving however theplate 56 free to rotate about thesame axis 50 about which thefixed knife 28 is rotatable. Theplate 56 carries astop element 62 formed by a block projecting from a lateral surface of the plate 56 (figure 2). - The
plate 56 and thestop element 62 form part of theadjustment device 30 which varies the interference between theblade 36 of the rotatingknife 22 and theblade 44 of thefixed knife 28. Theadjustment device 30 further comprises atie rod 64 articulated to theplate 56 about an axis parallel to saidaxis 50 about which theplate 56 is rotatable. Thetie rod 64 has a threadedportion 66 which engages anut 68 having a hexagonal portion which can be engaged by a spanner. Thenut 68 is free to rotate about its own axis inside abush 70 which is articulated to theshoulder 32 about an axis parallel to the articulation axis of the other and of thetie rod 64. The hexagonal portion of thenut 68 is placed in correspondence with anelongated aperture 72 formed in theshoulder 32, through which a spanner can be inserted for rotating thenut 68. It will be understood that the rotation of thenut 68 produces the rotation of theplate 56 about its own axis ofrotation 50 and such rotation modifies the angular position of thestop element 62. - For preventing undesired accidental movements of the
plate 56, alocking device 74 is provided, including atie rod 76 having a square orhexagonal head 78 which engages without possibility to rotate anelongated seat 88 formed in theplate 56. Thetie rod 76 extends through aslot 82 formed in theshoulder 32 and through abush 84. The end of the tie rod coming out from thebush 84 engages thenut 86 of a locking and unlockinglever 88. By rotating thelever 88 in the direction corresponding to the tightening of thenut 86 on thetie rod 76, thehead 78 of the tie rod rests against the bottom wall of theseat 80 and pushes theplate 56 against theshoulder 32 thereby locking theplate 56 against rotation. When an adjustment has to be carried out, thelever 88 is rotated in the direction corresponding to unscrewing thenut 86 from thetie rod 76 and in this manner the pressure pushing theplate 56 against theshoulder 32 is eliminated. After having unlocked theplate 56, it is possible to vary its angular position by acting on thenut 68. Thehead 78 of thetie rod 76 remains stationary inside theseat 80 but does not obstruct the rotation of theplate 56 by virtue of the elongated shape of theslot 82. - Up to now the part of the
adjustment device 30 which enables variations of the angular position of theplate 56 carrying thestop element 62 has been disclosed. However, theplate 56 can rotate about theaxis 50 independently of thefixed knife 68, so that the rotation of theplate 56 about theaxis 50 does not produce automatically a rotation of theknife 28. In accordance with a preferred embodiment of the present invention, theadjustment device 30 comprises afluid actuator 90 which constantly pushes thesupport 42 of thefixed knife 28 against thestop element 62. Theactuator 90 has afirst end 92 articulated to theshoulder 32 and asecond end 94 articulated to aflange 96 fixed to thesupport 42 and radially projecting therefrom. In normal operating conditions, theactuator 90 applies a force to theflange 96 tending to maintain theflange 96 constantly in contact with thestop element 62. As shown in figures 2 and 3, theadjustment device 30 comprises asecond stop element 98 fixed to theshoulder 32, which defines an inoperative position of theknife 28 which is particularly useful for carrying out the replacement of theblade 44. - The operation of the previously disclosed device is the following.
- In normal operating conditions of the
cutting assembly 10, theplate 56 is locked against theshoulder 32 by means of thelocking device 74. Theactuator 90 pushes theflange 96 against thestop element 62 and maintains theknife 28 in a fixed angular position. During the operation of thecutting assembly 10, theblade 38 of the rotatingknife 22 contacts theblade 44 of thefixed knife 28 during each rotation of the rotatingknife 34, thereby producing the transversal cut of thefoil 12 which moves between the two knives. The flexibility of theblades knives locking device 74 and rotates thenut 68 by means of a spanner. Such rotation of thenut 68 produces, as previously disclosed, a rotation of theplate 56 which varies the angular position of thestop element 62. Theactuator 90 automatically pushes the fixedknife 28 against thestop element 62 while it moves to the new position. Therefore, the fixedknife 28 rotates about theaxis 50 of an angle equal to the angular movement of theplate 56. The rotation of theknife 28 produces a variation of the interference conditions between theblade blade 56 is locked in the new position by means of thelocking device 74. - An important feature of the present invention consists in that the adjustment operation previously disclosed can be carried out also when the machine is running. Therefore, the result of the adjustment can be immediately perceived by the operator in terms of quality of the cut. As soon as the quality of the cut reaches the desired level, the operator has a confirmation of the fact that the adjustment has been correctly carried out. Therefore, the adjustment operation does not involve a stop of the machine and can be carried out very rapidly even by operators not particularly skilled.
- A second particularly important feature is that the adjustment device including the
tie rod 66, theplate 56 and theeccentric support 28 permits micrometric movements of theblade 44 and gives a very high adjustment precision. - When the
blade 44 must be replaced, the machine is stopped and theactuator 90 is brought in a retracted position in which theflange 96 abuts against thesecond stop element 98. The fixed knife moves therefore to a position in which the replacement of theblade 44 can be carried out much more easily. - Figure 6 shows a variant of the cutting assembly according to the invention, in which the elements corresponding to the ones disclosed above are indicated by the same numeral references. In the variant of figure 6, the fixed
knife 28 carries asecond flange 100 opposite to thefirst flange 96. With respect to the embodiment disclosed above, theactuator 90 has been moved on theopposite shoulder 32 and has afirst end 92 articulated to theshoulder 32 and asecond end 94 articulated to thesecond flange 100. In this manner, the fixedknife 28 is subject to a torsional load produced by the force of theactuator 90 which acts on thestop element 62 carried by thefirst flange 56. The torsional load on the fixedknife 28 compensates possible plays. - As a further alternative, the assembly according to the invention could be provided with two actuators placed in correspondence with both ends of the fixed
knife 28.
Claims (7)
- A foil cutting assembly, in particular for a wrapping machine, comprising:a fixed knife (28) and a rotating knife (22), having respective blades (44, 36) cooperating with each other, andadjustment means for varying the interference between the fixed knife (28) and the rotating knife (22),
- An assembly according to claim 1, characterized in that said adjustment means (30) comprises at least one threaded member (66, 68) adapted to control a variation of the operating position of the fixed knife (28).
- An assembly according to claim 2, characterized in that said threaded element (66, 68) is adapted to vary the angular position of a stop element (62) and in that the adjustment device comprises means (90) for pushing the fixed knife (28) in a position of abutment against said stop element (62).
- An assembly according to claim 3, characterized in that said stop element (62) is carried by a plate (56) which can rotate about the same axis of rotation of the fixed knife (28).
- An assembly according to claim 3, characterized in that it comprises a fluid actuator (90) arranged for pushing the fixed knife (28) against said stop element (62).
- An assembly according to claim 5, characterized in that said fluid actuator (90) is also provided for bringing the fixed knife (28) in an inoperative position for replacing the blade (44).
- An assembly according to claim 4, characterized in that it comprises a locking device (74) for maintaining said stop element (62) in a steady operating position.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999606036 DE69906036T2 (en) | 1999-05-06 | 1999-05-06 | Foil cutting device, in particular for a winding machine |
EP19990830271 EP1052209B1 (en) | 1999-05-06 | 1999-05-06 | Foil cutting assembly, in particular for a wrapping machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19990830271 EP1052209B1 (en) | 1999-05-06 | 1999-05-06 | Foil cutting assembly, in particular for a wrapping machine |
Publications (2)
Publication Number | Publication Date |
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EP1052209A1 true EP1052209A1 (en) | 2000-11-15 |
EP1052209B1 EP1052209B1 (en) | 2003-03-19 |
Family
ID=8243395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990830271 Expired - Lifetime EP1052209B1 (en) | 1999-05-06 | 1999-05-06 | Foil cutting assembly, in particular for a wrapping machine |
Country Status (2)
Country | Link |
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EP (1) | EP1052209B1 (en) |
DE (1) | DE69906036T2 (en) |
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EP2090535A1 (en) * | 2008-02-15 | 2009-08-19 | Tocchio S.r.l. | Device for cross-cutting web materials |
WO2020094565A1 (en) * | 2018-11-08 | 2020-05-14 | Khs Gmbh | Cutting unit for a labeling device, and labeling device having such a cutting unit |
CN113165764A (en) * | 2018-11-29 | 2021-07-23 | Khs有限责任公司 | Vacuum drum for a labeling assembly and labeling assembly with such a vacuum drum |
US20220024062A1 (en) * | 2018-11-28 | 2022-01-27 | Fabio Perini S.P.A. | Perforating device and converting machine comprising said device |
US11667425B2 (en) | 2019-08-08 | 2023-06-06 | Khs Gmbh | Vacuum drum for a labeling unit, and labeling unit comprising a vacuum drum of this type |
IT202200011489A1 (en) | 2022-05-31 | 2023-12-01 | Valmet Tissue Converting S P A | SUPPORT DEVICE FOR BLADES OF A CUTTING OR DRILLING UNIT OF A STRIP-SHAPED MATERIAL, AND MACHINE |
IT202200011492A1 (en) | 2022-05-31 | 2023-12-01 | Valmet Tissue Converting S P A | SUPPORT DEVICE FOR A BLADE, CUTTING OR DRILLING DEVICE INCLUDING SUPPORT DEVICE AND MACHINE |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE202004011334U1 (en) * | 2004-07-20 | 2005-12-01 | Krones Ag | Cutting device for sheet materials, has guiding unit that is arranged opposite conveyor and that moves towards orbit of blade which rotates around rotation axis, such that rotation axis is arranged perpendicular to conveyed sheet material |
DE102006051359A1 (en) | 2006-10-27 | 2008-04-30 | Khs Ag | Label cutter drum for label application machine adjusts blade positions by shifting drum axle position |
WO2024061845A1 (en) | 2022-09-22 | 2024-03-28 | Valmet Tissue Converting S.P.A. | Packaging machine with sealing device for paper wrapping materials |
WO2024061846A2 (en) | 2022-09-22 | 2024-03-28 | Valmet Tissue Converting S.P.A. | Packaging machine with sealant dispensing device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2782853A (en) * | 1955-08-08 | 1957-02-26 | American Viscose Corp | Precision fiber cutter |
US3359843A (en) * | 1966-05-05 | 1967-12-26 | Lamb Grays Harbor Co Inc | Blade adjusting mechanisms for rotary paper cutters |
-
1999
- 1999-05-06 DE DE1999606036 patent/DE69906036T2/en not_active Expired - Lifetime
- 1999-05-06 EP EP19990830271 patent/EP1052209B1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2782853A (en) * | 1955-08-08 | 1957-02-26 | American Viscose Corp | Precision fiber cutter |
US3359843A (en) * | 1966-05-05 | 1967-12-26 | Lamb Grays Harbor Co Inc | Blade adjusting mechanisms for rotary paper cutters |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2090535A1 (en) * | 2008-02-15 | 2009-08-19 | Tocchio S.r.l. | Device for cross-cutting web materials |
US11613037B2 (en) | 2018-11-08 | 2023-03-28 | Khs Gmbh | Cutting unit for a labeling device, and labeling device having such a cutting unit |
WO2020094565A1 (en) * | 2018-11-08 | 2020-05-14 | Khs Gmbh | Cutting unit for a labeling device, and labeling device having such a cutting unit |
CN113165765A (en) * | 2018-11-08 | 2021-07-23 | Khs有限责任公司 | Cutting mechanism for a labelling machine and labelling machine with such a cutting mechanism |
CN113165765B (en) * | 2018-11-08 | 2023-08-29 | Khs有限责任公司 | Cutting mechanism of labelling machine set and labelling machine set with same |
US20220024062A1 (en) * | 2018-11-28 | 2022-01-27 | Fabio Perini S.P.A. | Perforating device and converting machine comprising said device |
CN113165764A (en) * | 2018-11-29 | 2021-07-23 | Khs有限责任公司 | Vacuum drum for a labeling assembly and labeling assembly with such a vacuum drum |
CN113165764B (en) * | 2018-11-29 | 2023-02-28 | Khs有限责任公司 | Vacuum drum for a labeling assembly and labeling assembly with such a vacuum drum |
US11535413B2 (en) | 2018-11-29 | 2022-12-27 | Khs Gmbh | Vacuum drum for a labeling unit, and labeling unit having a vacuum drum of this type |
US11667425B2 (en) | 2019-08-08 | 2023-06-06 | Khs Gmbh | Vacuum drum for a labeling unit, and labeling unit comprising a vacuum drum of this type |
IT202200011489A1 (en) | 2022-05-31 | 2023-12-01 | Valmet Tissue Converting S P A | SUPPORT DEVICE FOR BLADES OF A CUTTING OR DRILLING UNIT OF A STRIP-SHAPED MATERIAL, AND MACHINE |
IT202200011492A1 (en) | 2022-05-31 | 2023-12-01 | Valmet Tissue Converting S P A | SUPPORT DEVICE FOR A BLADE, CUTTING OR DRILLING DEVICE INCLUDING SUPPORT DEVICE AND MACHINE |
WO2023232895A1 (en) | 2022-05-31 | 2023-12-07 | Körber Tissue S.p.A. | Support device for a blade, cutting or perforating device comprising the support device, and machine |
Also Published As
Publication number | Publication date |
---|---|
EP1052209B1 (en) | 2003-03-19 |
DE69906036T2 (en) | 2004-01-22 |
DE69906036D1 (en) | 2003-04-24 |
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