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
• • 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
  • B26D1/56—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 travels with the work otherwise than in the direction of the cut, i.e. flying cutter
  • B26D1/58—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 travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is mounted on a movable arm or the like
• • 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
  • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
  • B26D3/08—Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising
• • 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
  • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D5/08—Means for actuating the cutting member to effect the cut
  • B26D5/16—Cam means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
  • B26F2210/00—Perforating, punching, cutting-out, stamping-out, severing by means other than cutting of specific products
  • B26F2210/04—Making plastic pilferproof screw caps by cutting a tamper ring

Definitions

• the invention relates to a device for introducing at least one cut running in the circumferential direction of a plastic closure, with at least one knife, according to the preamble of claim 1.
• a cut made in the circumferential direction of a plastic closure serves, for example, to form a guarantee ring which, when opening a container onto which the plastic closure is placed, is separated at least in sections from the plastic closure and / or is irreversibly deformed in such a way that opening the container for the first time is indicated is.
• Devices of the type mentioned here are known. They have a plurality of fixedly arranged knives, past which a plastic closure which can be displaced along a movement path is passed. In general, three knives arranged one behind the other in the direction of displacement of the closure are used for this purpose, to which the closure is pressed and thereby rolls along the movement path due to its displacement movement.
• each knife makes a partial cut extending over 120 ° of the circumferential surface of the closure, which is adjacent to one another, thereby forming a continuous cut.
• a continuous cut is made in the circumference of the closure, but the cut points due to the knife arrangement and cutting edge geometry - seen in the circumferential direction - different depth.
• the course of the cut is such that the depth of cut is very small in the initial area of a knife, becomes larger towards the center of the knife and becomes smaller again from the middle to the end area of the knife.
• This course of depth of cut cannot guarantee in all cases that the forces acting on the guarantee ring when the container is opened are sufficient to damage or deform it in the desired manner, so that opening for the first time cannot be detected with certainty.
• Another disadvantage of the different depth of cut is that the guarantee ring in the areas with the greatest depth of cut can be separated from the closure in sections during its manufacture or when it is placed on the container, which in turn impairs the reliability of the guarantee ring.
• a cutting device with the features of claim 1 is proposed.
• the holding device can be displaced with respect to a movement path of the closure via a control, that the closure is rotatably mounted about its central axis, and that the cut is made by rotating the closure about its central axis. can be brought, the distance between the closure and the knife being constant or substantially constant during the rotation.
• the closure With a circumferential cut, the closure is rotated through 360 °.
• the closure is first brought together with the knife fixed by a holding device and, after contacting the knife, rotated in a defined manner about its central axis. At least one cut running in the circumferential direction of the closure is made with a constant depth.
• the uniform depth of cut over the circumference of the closure is achieved in that the distance between the closure and the knife is not changed during the rotation of the closure about its central axis. This means that at least the area of the knife with the smallest distance to the central axis of the closure has a fixed position with respect to the closure during the cutting process. Since only a single knife is required to make the cut running in the circumferential direction of the closure, the construction of the cutting device can be simplified and thus its costs can be reduced.
• the cutting device which is characterized in that the path of movement of the closure is a circular path and that the holding device holding the knife is displaceable along a closed, curved contour path, the center of which lies on the center of the circular path.
• the cutting device has a carousel-like structure, that is to say that the closure and knife or the holding device holding the knife are removed together during the cutting process. along the path assigned to them, preferably at the same rotational speed.
• the control is designed as a curve control, which here has a disk curve. This is scanned by a probe element which interacts with the holding device for the knife.
• the probe element is preferably connected to the holding device to which the knife is attached. The contour path along which the holding device is displaced is thus determined by the disk curve.
• the depth of cut is adjustable. This makes it possible to adapt or adjust the cutting device to plastic closures with different wall thicknesses, shapes and / or from different plastics.
• a defined cutting angle can be set so that the cutting surface is inclined by an angle that is greater than 0 ° and less than 90 ° with respect to an imaginary horizontal.
• the cut surface formed during the cutting process is parallel to the imaginary horizontal, that is to say perpendicular to the circumferential surface of the closure.
• Figure 1 is a plan view of an embodiment of the cutting device according to the invention.
• FIG. 2 shows a side view of an exemplary embodiment of a holder for the closure.
• FIG. 1 shows a plan view of a schematic diagram of an exemplary embodiment of a device, referred to below as the cutting device 1, for making at least one cut in a closure 3 made of plastic, which is used for closing a container, for example a bottle.
• the closure 3 is rotatably supported about its central axis 5 by means of a holder shown in FIG.
• the movement path 7 is a circular path with the center 9.
• the closure 3 is shown in FIG. 1 in a plurality of positions A to F, which it assumes or traverses in succession within the cutting device 1.
• the cutting device 1 comprises a holding device 11 which can be displaced around the center 9 of the movement path 7 and which has an adjusting element 13 to which a knife 15 is fastened.
• the adjusting element 13 is guided in a groove 17 and can be attached using at least one fastening means 19, for example by means of two locking screws the holding device 11 are fixed.
• the longitudinal central axis 20 of the groove 17 intersects the center point 9, that is to say that the knife 15 can be displaced in the direction of the center point 9 as well as in the direction of the movement path 7 by moving the adjusting element 13 in the groove 17.
• the holding device 11 further comprises a guide member 21 for the closure 3, which has a the closure receiving, open-edged, semi-circular recess "23.
• the recess 23 is 7 facing side surface of the guide part is introduced, starting from a plane, the path of movement 25 21 in this.
• the Knife 15 fastened to the adjusting element 13 is positioned on the holding device 11 in such a way that, in order to engage the closure, it projects into the recess 23 of the guide part 21, whereby the depth of the cut to be made in the circumference of the closure 3 is determined
• the depth of cut can be adjusted in a simple manner by varying the position of the setting element 13, to which the knife 15 is attached, within the groove 17.
• a feeler element 27 is provided, which cooperates with a controller 29 of the cutting device 1, which is followed in the following which will be discussed in more detail.
• the controller 29 is designed as a cam controller, which comprises a contour disk 31, also referred to as a cam disk, which is essentially circular and whose center lies on the center 9 of the movement path 7 of the closure 3.
• the contour disk 31 has a fixed position and rotates when the holding device 11 is displaced and the closure 3 not with, but remains in the position shown in Figure 1.
• the contour disk 31 has a curved outer contour 33, which is scanned by the sensing element 27 of the holding device 11, which is displaceably mounted in the direction of the longitudinal central axis 20.
• the holding device 11 is positively guided when it rotates around the center 9 and is displaced along a contour path, the course of which corresponds to the outer contour 33 of the contour disk 31.
• the contour disk 31 has a partial section 35.1 which extends over a circumferential region of approximately 110 ° and is designed as a circular path section.
• the section 35.1 is adjoined — as seen in the direction of displacement of the holding device 11 and the closure 3 (arrow 37) - by a section 35.2 which extends over a circumferential area of approximately 140 ° and is likewise designed as a circular section, the radius of which is smaller than the radius of subsection 35.1.
• a third subsection 35.3 adjoins subsection 35.2, which extends over a circumferential area of approximately 35 °.
• the radius of the contour disk 31 in the area of the section 35.3 is larger than the radius both in the area of the section 35.2 and in the area of the section 35.1.
• the transition area from subsection 35.3 to subsection 35.1 has an inwardly curved, that is to say concave profile, as seen in the direction of the center 9.
• the transition from one section to the other extends over a relatively large circumferential area of the contour disk 31 and shows no sharp edges and jumps.
• the function of the cutting device 1 is explained in more detail below with the aid of a cutting process:
• the closure 3 is transferred in position A from a processing station (not shown) for the closure 3 to the cutting device 1.
• the closure 3 is introduced into the semicircular recess 23 of the guide part 21 of the holding device 11 and centered. In this position, the side surface 25 of the guide part 21 lies on the movement path 7.
• the closure 3 and the holding device 11 are displaced together in the direction of the arrow 37, the closure 3 along the movement path 7 and the holding device 11 along the through the outer contour 33 of the Contour disk 31 predetermined contour path.
• the holding device 11 is displaced relative to the movement path 7 of the closure in the direction of the center 9.
• the distance between the holding device device 11 and the movement path 7 is enlarged such that the guide part 21 releases the closure 3, that is, the closure 3 fixed by the holder (not shown in FIG. 1) is guided outside the effective range of the recess 23.
• the closure 3 and the holding device 11 are at a constant distance from one another.
• the closure 3 can be machined, preferably at least one vertical incision is made in the region of the closure circumference, in which the guarantee ring is subsequently formed by a circumferential cut.
• the cut running in the circumferential direction of the closure 3 is made in the region of the partial section 35.3.
• the holding device 11 is displaced outward in the direction of the movement path 7, so that the closure 3 is guided in the recess 23 of the guide part 21, the distance between the closure 3 and the knife 15 projecting into the recess 23 being so small is that the cut can be made in the circumference of the closure 3.
• the closure 3 is rotated in the region of the partial section 35.3 at least by 360 ° about its central axis 5, as a result of which a cut is made in the circumferential direction of the closure 3.
• FIG. 2 shows an exemplary embodiment of a holder 39 for the closure 3, which has a pin-shaped holding element 41 and a gearwheel 43 connected to it in a rotationally fixed manner.
• the gear 43 cooperates with a drive device, not shown, by means of which the rotational speed of the closure 3 can be adjusted about its central axis 5.
• the rotational speed of the shutter 3 is in the range of the section 35.3 at least so high that "it performs a 360 ° rotation, is introduced whereby the running in the circumferential direction section.
• the cutting device 1 described with reference to FIG. 1 has a plurality of holding devices 11, each with at least one knife.
• their throughput that is to say the number of closures processed by the cutting device, can be increased.
• the use of several knives increases their service life and thus the maintenance intervals of the cutting device, in which the knives that are subject to wear are exchanged.
• a closure and a holding device having a knife are guided together from the inlet (position A) of the cutting device to the outlet (position F), that is to say they have the same rotational speeds.
• the knife 15 attached to the adjusting element 13 is preferably designed as an interchangeable cutting plate, so that when the knife wears it can be replaced easily and quickly.
• the knife 15 has a straight cutting edge on, which is aligned purely as an example tangential to the circumference of the closure.
• the knife can also be inclined at an acute or obtuse angle with respect to the closure.
• the cutting device 1 can be used to make an exact cut running in the circumferential direction of a closure, thereby preferably forming a guarantee ring, also known as a guarantee band.
• the depth of cut is determined by the contour disk 31, which controls the relative movement of the holding device 11 with respect to the movement path 7 of the closure 3.
• the cutting depth can be finely adjusted, for example to compensate for tolerances of the individual device parts.
• the distance between the knife and the closure is constant, so that the cut has a constant depth over the entire circumference of the closure, whereby the tamper-evident function of the guarantee ring can be guaranteed with a high degree of certainty.
• Cutting device characterized in that the movement path (7) is a circular path and that the holding device (11) holding the knife (15) can be displaced along a preferably closed, curved contour path, the center point of which is on the center point (9) the circular path.
• Cutting device characterized in that the rotational speed of the closure (3) and that of the knife (15) is the same or substantially the same. 4. Cutting device according to one of the preceding claims, characterized in that it has a plurality of holding devices (11), each with at least one knife (15).
• Cutting device characterized in that at least a partial section (35.1, -35.2; 35.3) of the contour path is a circular path section.
• control (29) is a cam control with a contour disc (31) which can be scanned by a contact element (27) cooperating with the holding device (11).
• the holding device (11) comprises a guide part (21) with a preferably semicircular recess (23) for the closure (3).
• Cutting device characterized in that the cutting depth of the knife (15) is adjustable.
• Cutting device characterized in that the position of the knife (15) relative to the closure (3) is adjustable.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Closures For Containers (AREA)
• Details Of Cutting Devices (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Sampling And Sample Adjustment (AREA)
• Debarking, Splitting, And Disintegration Of Timber (AREA)
• Shaping Of Tube Ends By Bending Or Straightening (AREA)
• Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)
• Knives (AREA)

Priority Applications (8)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7853479

Family Applications (1)

Country Status (11)

Families Citing this family (2)

Citations (6)

• 1997
  • 1997-12-29 DE DE19758040A patent/DE19758040C2/de not_active Expired - Fee Related
• 1998
  • 1998-12-23 WO PCT/EP1998/008438 patent/WO1999033618A1/de active IP Right Grant
  • 1998-12-23 EA EA200000725A patent/EA001669B1/ru not_active IP Right Cessation
  • 1998-12-23 HU HU0100047A patent/HU222222B1/hu not_active IP Right Cessation
  • 1998-12-23 ES ES98965871T patent/ES2173665T3/es not_active Expired - Lifetime
  • 1998-12-23 UA UA2000074565A patent/UA42893C2/uk unknown
  • 1998-12-23 DE DE59803573T patent/DE59803573D1/de not_active Expired - Fee Related
  • 1998-12-23 PL PL98341385A patent/PL188265B1/pl not_active IP Right Cessation
  • 1998-12-23 EP EP98965871A patent/EP1044085B1/de not_active Expired - Lifetime
  • 1998-12-23 CZ CZ20002414A patent/CZ293237B6/cs not_active IP Right Cessation
  • 1998-12-23 CA CA002316815A patent/CA2316815C/en not_active Expired - Fee Related
  • 1998-12-23 JP JP2000526335A patent/JP2001526971A/ja active Pending

Patent Citations (6)

Non-Patent Citations (1)

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