Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B7/00—Closing containers or receptacles after filling
  • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
  • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
  • B65B7/2842—Securing closures on containers
  • B65B7/285—Securing closures on containers by deformation of the closure
  • B65B7/2857—Securing closures on containers by deformation of the closure and the container rim

Definitions

• the invention relates to the field of packaging technology and the clinching process which precedes a folding of the edge of the lid and the body flange.
• the machines and feed lines used today allow filling at very high speeds. It is not uncommon for the volume of the filling material to take up more space than the lid box has. Then the bottoms and lids bulge out during the merging for the clinching process and later provide the consumer with the image of a can, the contents of which may have been spoiled: the curvature of the lid creates the impression that there is an overpressure generated by fermentation gases inside due to fermentation processes. Such cans are therefore not only unacceptable for aesthetic reasons, since the consumer cannot recognize the cause of the curvature. Because to reduce packaging waste, the cans are usually placed on the market today without a carton, there is the additional disadvantage that the cans do not stack properly when the cans are bulged.
• the core (or mirror) of the lid must not have any deformations so that the closing head can be immersed safely and unhindered with high precision in the lid core during the subsequent closing process.
• An arrangement with two synchronously driven cam disks which supports the cover core along the length of the clinching in that the cams engage in the core of the cover and absorb the horizontally acting forces which have to be applied by the clinching rollers for the deformation of the cover edge .
• the length of the cams can be adjusted to the length of the rectilinear lid edge (cf. DE 93 08 385.8 U1).
• the driver chain runs between the two cam disks, so that the width of the cams is very limited. This device is therefore not able to counteract vertical forces when clinching. The form stability of the lid is therefore not guaranteed.
• this object is achieved by a support disk according to claim 1, a clinching device according to claim 6 and the method according to claim 9 or 13.
• the support disc can be driven in the center and can be coupled with the drives for the clinch rollers, for example via a common shaft, the drive forces being able to be transmitted from the shaft to the clinch rollers via a bevel gear drive and the support disc being driven directly by the shaft.
• the lid transport chain is removed and returned shortly after the place at which it delivers the lid, so that it does not run through the clinching station (claim 6).
• the support disk can be designed as a wheel or in another shape based on a cylinder with a relatively small axial expansion. It has at least one support element on its circumference, which in turn has a profile with which the vertical forces that possibly act on the lid core from below can be effectively absorbed, so that a bulging of the lid is prevented (claim 1).
• the profile sole of the support element is shortened, so that several millimeters remain free in the front and / or rear in the more curved areas of the can.
• the support element can be undercut in the direction of the center of the pane (claim 5).
• the width of the support elements (in the axial direction of the support disc) is preferably such that the cover core is completely or almost completely filled out laterally.
• the support disk can thus also absorb horizontal forces which arise from the clinching rollers during clinching and in the section of the lid edge in which the clinching is performed.
• each support element is designed as a cylinder circumference segment. While the cans "drive” into the clinching station, the support disc rotates in the same direction as the linear movement of the cans.
• the profile sole of the support element is rolled on the can lid from the front to the rear and thus comes to lie "on its entire surface of the lid” in a strip that moves linearly on the lid (claim 13) over the entire process, while the clinching rollers lie on the straight longitudinal sides Clinching the can in the same direction from front to back.
• the cans essentially maintain their throughput speed.
• the drives for the clinch rollers are set so that the can when
• Clinching is accelerated slightly (claim 12). Scratches as a result of the changed load resting on the driver can thereby be avoided.
• the support disk preferably has a plurality of support elements. For example, three support elements can be provided. The number actually chosen should be made dependent on the circumference of the support disc and the distances with which the can bodies are guided.
• the disk is preferably driven at such a speed that a circumferential rotation divided by the number of support elements corresponds exactly to the distance between two cans guided to the clinching station (claim 11).
• the angular velocity of the tread soles should
• Support elements match the speed of the can run as possible.
• the support disc can contain the support element (s) as an integral part. But it is also possible that the support elements are removably attached, so that when changing the can size, the corresponding matching cans can be attached to the support elements. In such cases, the support elements can be fastened via bolts, screws or the like.
• the invention (s) are explained and supplemented below using several exemplary embodiments.
• Figure 1 is a side view of a roller 1 with a large diameter R, which is disc-shaped and three support areas 4, 4 'and 4 "on it
• Figure 2 is a section in the axial direction along the line A-A, from which section the profiled sole 8 'of the support area 4' can be seen, which is hat-shaped and has a recess 10 on its profile sole, which to the
• Figure 3d are four different shapes of lids 20a, 20b, 20c, 20d of metal cans, the respective handle tabs 11a, 11b, 11c, 11d are shown and correspond to a recess 10 to be made in each case in FIG. 2, which there is only schematic and in side view for the lid according to Figure 3a or 3d is shown.
• FIG. 4 shows two snapshots in an illustration of how a printing strip S slides over the cover mirror 20b of the example from FIG. 3b (start 46, end 47).
• the support disc 1 is driven in the middle, e.g. based on a shaft, not shown here, which runs through the circular recess 2.
• the support disc is based on a substantially cylindrical shape with a radius R and a thickness or thickness between D and D '.
• the support elements 4, 4 ', 4 " On its circumference 3 it has three integral support elements 4, 4 ', 4 ", each of which should have a length L (in the circumferential direction) which should be significantly less than that of a cover core.
• the support elements 4, 4 ', 4 " have a profile (" profile sole ") 8,8', 8 ⁇ which is significantly widened compared to the cylindrical inner shape of the support disc itself and which should be adapted to the dimensions of the respective cover core
• the three support elements are regularly spaced 120 ° apart, and the profile soles have a length L of a little less than 60 °.
• the direction of rotation of the disc 1 is indicated by the arrow 5.
• the support elements 4 When rolling on the can lids, the support elements 4 first lie with the front part 6 on the front part of the can lid mirror (strip 46 in FIG. 4) and then roll on the same-running lid core to the rear part 7 (strip 47 in FIG. 4), while at the same time clinching rollers 30, 31 engage along the edge of the lid and can, caused by the linear motion of the can v.
• the profile soles 8, 8 ' which can be seen in side view in FIG. 1 and in section in FIG. 2, are to be described by way of example on the support element 4', the profile sole 8 'of which can be seen in FIG. 2, where a recess 10 is shown , which appears clearly in the section, but which, according to FIGS. 3a to 3d, appears as a specific flat recess there, which is matched to the respective can lid with its lid ring (pull tab) 21a, 21b, 21c, 21d, and which takes the place of the total area of the profile sole 8 'is placed where the lid ring mentioned (short: 21) is located.
• FIG. 3a to 3d the imprint of the edge of the recess 10a, 10b, 10c, 10d (short: 10) is shown in each case in dashed lines and surrounds the cover ring 21 with a slight security edge or strip.
• Recesses can also be made on both sides of the profile sole 8 ' be provided so that the direction of the retracting can or the orientation of the supplied lid has no relevance.
• the second exception area 10a ' is shown as an example in FIG. 3a. It lies mirror-symmetrically to the central plane of the can lid (protruding perpendicularly from the paper), which is shown in supervision in all of FIG. 3.
• the position of the grip tab 21b is provided at an angle of approximately 45 °, the tear-open tab of the grip tab 21b pointing into the rounded corner area of the can lid 20b, the surface of which is smaller.
• a recess 10b ' which in this case is rotationally symmetrical in the opposite corner and is oriented in this direction, which corresponds to the recess 10b into which the grip tab 21b just fits.
• FIG. 3c shows a polygonal shape of the recess 10c that fits the grip tab 21c, here the size of the recess and the remaining free space for the grip tab 21c are larger, due to the selected line sections that are composed, but the recess can more easily enter the profile sole 8 , 8 ', 8 "of the support element 4.
• the recess 10d is shown in the same way in FIG. 3d, with an associated tear-open handle 21d in the cover mirror (cover core) 20d.
• the recess 0 in FIG. 2 is therefore only a schematic illustration of all the recesses explained in FIG. 3 and in each case dependent on the position, the direction and the shape of the cover ring. Further small recesses can be provided if the cover carries elevations for stiffening, but they are small in relation to the total area of the profile sole.
• the profile sole 8 'in FIG. 2 can still be clarified in its cross section, with regard to the rearward recesses 9a, 9b (undercuts), which define a hat-shaped shape by a flat front contact area of the profile sole and a recessed intermediate support section, which in FIG the inner disc 1 with a diameter D 'opens.
• This disk can be reduced once again in the central region, in its axial dimension (the axis is denoted by 100), in order to facilitate attachment through the central opening 2.
• the reduced extent is D, which is stepped over D ', the width of the intermediate section of the support element 4' and the even wider profile sole 8 'widens in the axial direction 100 from the inside to the outside.
• the box which is shown in FIG. 4 in top view, corresponds - as an example - to the box from FIG. 3b with a drawing ring 21b placed left to left and at an angle of approximately 45 °, which fits into the recess 10b of the profile sole 8.
• the profile sole 8 is shown in FIG. 1 in a front area 6 and a rear area 7, with respect to the direction of rotation 5.
• This front area 6 engages and justifies the lid mirror 20b when the can is moved in with the lid 20b attached in FIG. 4 there a strip-shaped area 46, which has a supporting function, while the clinching rollers 30, 31, which are spaced apart in the direction of the axis 100 of the supporting disc 1, perform their task.
• the support disc initially supports the cover mirror from the upward with the initial area 6, so that support function is achieved in such a large area of the surface that vertical forces which may occur, which act on the cover 20b from the inside (the Cover mirror or the cover core) act effectively (in the area between the clinch rollers 30, 31).
• the strip-shaped region 46 moves over the cover mirror 20b when the can, which has the linear movement v, moves, and a further instantaneous picture is shown in FIG. 4 in the rear part of the cover mirror 20b.
• the rollers 30, 31 clinch (the same rollers that are not displaced, that are only offset laterally to describe the linear movement of the can) and after both the can has moved linearly forward and the support disc 1 has rotated circumferentially the rear area 7 engages in a strip-like manner on the can lid, forms a support strip 47, as was also the case in the inlet area with the initial support strip 46; only in this momentary image is the support strip continuous due to the design of the profile sole 8, 8 ', 8 ", because no cover ring 21b has to be taken into account and the profile sole 8 need not and does not have a recess 10b here.
• the sliding of the strip S over the lid core 20b covers almost the entire surface of the lid core, not simultaneously with regard to the instantaneous recordings, but nevertheless accumulated through the movement of the can body through the clinching station.
• the surface area which is covered by this strip-shaped support zone S is designed such that the cover format of FIG. 3a has a support area of approximately 75% of the cover surface (without the second recess 10a '), that the shape of the Figure 3b has a coverage of about 60% (without the second recess 10b 'or 10b ") and that Figure 3c also reaches about 60% (slightly less) of area coverage, it should be noted that the smaller the lid surface, the Percentage of coverage is slightly reduced, but in any case remains above 50%, even with the smallest commercially available lid format, because the lid flap will always have a certain size (due to the size of the human finger) and is therefore covered takes up a larger space on the lid mirror 20 as a percentage of the lid size.
• the overlap in the Hansa format of the can (long oval fish can) shown there is even around 85% and in the event that a lid format of the menu tins is chosen, the area coverage rises over 90%.
• the circumferential speed 5 at the height of the radius or diameter of the profile sole 8 is approximately the speed that the can has as speed v when it moves into the clinching station.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Closures For Containers (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)
• Control And Other Processes For Unpacking Of Materials (AREA)

Applications Claiming Priority (5)

Publications (2)

Family

ID=26023676

Family Applications (1)

Country Status (5)

Family Cites Families (2)

• 1997
  • 1997-03-11 DK DK97908134T patent/DK0891280T3/da active
  • 1997-03-11 AT AT97908134T patent/ATE194564T1/de not_active IP Right Cessation
  • 1997-03-11 DE DE59702011T patent/DE59702011D1/de not_active Expired - Fee Related
  • 1997-03-11 EP EP97908134A patent/EP0891280B1/fr not_active Expired - Lifetime
  • 1997-03-11 DE DE19780206T patent/DE19780206D2/de not_active Expired - Fee Related
  • 1997-03-11 WO PCT/DE1997/000477 patent/WO1997033793A1/fr not_active Ceased

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events