Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H45/00—Folding thin material
  • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
  • B65H45/16—Rotary folders
  • B65H45/162—Rotary folders with folding jaw cylinders
  • B65H45/164—Details of folding blades therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H45/00—Folding thin material
  • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
  • B65H45/16—Rotary folders
  • B65H45/162—Rotary folders with folding jaw cylinders
  • B65H45/166—Rotary folders with folding jaw cylinders having an adjustable circumference

Definitions

• the invention relates to a folding knife cylinder of a folding apparatus and a method for adjusting a folding knife on a folding knife cylinder according to the preamble of claims 1 or 15.
• Such cylinders are used to cooperate with a jaw cylinder to introduce a transverse fold into a sheet of material which passes through a gap between the jaw cylinder and the jaw cylinder.
• at least one folding knife is movable in the folding knife cylinder between an inactive position, in which it does not protrude over the outer surface of the folding knife cylinder, and an active position, wherein in the active position it presses the sheet to be folded into a gap in the opposing folding jaw cylinder, which then closes and transports the folded sheet clamped to the fold.
• DE 43 35 048 A1 describes a folding knife cylinder for a folding apparatus, each with a single gap for a folding knife.
• the folding knife is adjustable in the circumferential direction within this gap.
• DE 690 08007 T2 shows a folding knife cylinder, the folding knife of which can be brought into a working and a rest position for different types of fold.
• the invention has for its object to provide a folding blade cylinder of a folding blade cylinder and a method for adjusting a folding blade on a folding blade cylinder.
• the saddle has a plurality of gaps assigned to a folding knife instead of a single, displaceable gap, and that the folding knife can be retracted so far into the interior of the folding knife cylinder that it is inside the folding knife cylinder between different ones, each one of the Column opposite positions is adjustable.
• Another possibility is to provide a small stroke of the folding movement between the extended active and the inactive position of the folding knife, the folding knife being at least partially radially outside the inner surface of the saddle in the inactive position, and also the folding knife over the inactive one Position to be retractable to behind the inner surface of the saddle, so as to allow the folding knife to be adjusted to another gap.
• a folding knife is usually controlled by a lever running on a control curve.
• an actuator can be provided for lifting the lever off this control curve.
• Such an actuator can, for. B. be a lifting cylinder; Electromagnetically driven actuators can also be considered.
• a second control cam can also be provided, which can be rotated against the former and has a section which can be brought into contact with the lever arm by rotation in order to pull the folding knife back behind the inner surface of the saddle.
• the gaps at their outer longitudinal edges can be chamfered.
• a closing body is preferably provided which, coupled to the adjustment of the folding knife, is adjustable between a position in which it closes a gap not occupied by the folding knife and a position which is retracted into the interior of the folding knife cylinder.
• a closing body can also counteract the formation of an impression, in particular if it is flush on part of its outside with the outer surface of the saddle, but more importantly, it prevents a free end of an arch from penetrating into the otherwise open gap.
• the closing body and / or the gap which can be closed by it have bevels on their mutually facing sides.
• a spring element can be used to extend the closing body through a radially outward To hold pressure in place against the gap.
• Figure 1 is a schematic radial section through a folding knife cylinder.
• FIG. 2 shows an axial section through the folding knife cylinder from FIG. 1;
• FIG. 3 shows a modification of the folding knife cylinder in a partial radial section
• FIG. 4 shows a second modification in a radial partial section analogous to that of FIG. 3;
• FIG. 5 shows a third modification in a radial partial section analogous to that of FIG. 3.
• FIG. 1 and 2 show a first embodiment of the folding knife cylinder in an axial and a radial section.
• the axial section of FIG. 2 shows a shaft 01 on which two flanges 02 are screwed in a rotationally fixed manner.
• These flanges 02 carry the saddle 03 (see FIG. 1) of the folding knife cylinder, which in this embodiment is composed of six segments 06, 07, which are each separated by gaps 08 and 09, which extend radially over the entire distance between the flanges 02 .
• Three several holding elements 12 with grippers extend through slots in the segments 06 and are each mounted on spindles 11, which in turn are pivotably suspended between the two flanges 02.
• Trusses 14 penetrate oblong holes 16 in the form of circular segments of the flanges 02 and connect the flanges 13 to one another in order to couple the rotational movement of the flanges 13.
• the cross members 14 are combined in the area between the flanges 02 to form a hollow cylinder surrounding the shaft 01 in order to achieve the greatest possible torsional rigidity.
• Three spindles 17 of folding knives 18 are rotatably mounted on the flanges 13.
• the grippers 12 and the folding knives 18 each perform a back and forth movement in time with the rotation of the folding knife cylinder, which is controlled in a manner known per se by levers 19 and 21 mounted on one axial end of the spindles 11 and 17, respectively.
• This lever 19; 21 carry rollers 22 at their ends, which roll on control cams 23.
• These control curves 23 have the shape of stationary disks, they are not shown in FIG. 2 and only in the form of cutouts in FIG. 1.
• the left and the lower folding knife 18 are in an inactive position of their folding movement, in which they are retracted behind the inner surface 24 of the saddle 03.
• the right folding knife 18 is in an extended, active position, in which its tip protrudes slightly above the surface of the saddle 03 and is thus able to press a sheet carried by the gripper 12 into a folding jaw of an opposite folding jaw cylinder, not shown .
• the two flanges 13 are connected by L-shaped profiles 26, which on their legs facing the saddle 03 have a closing body 27 pressed by a spring element 28 against the inner surface 24 of the saddle 03.
• Spring element 28 and closing body 27 are formed here in one piece as a spring plate, which extends over the entire length of column 09 in the axial direction.
• the closing bodies 27 are arranged relative to the folding blades in such a way that they close the gaps 09 when the folding blades 18 lie on the gaps 08, as shown in FIG. 1. They prevent a free end of a sheet folded by the folding knives 18 from hitting the gap 09 and getting caught there. This is particularly expedient if the gap 08 corresponds to a delta fold position (corresponds to a second transverse fold) and the gap 09 corresponds to a first transverse fold position.
• the closing bodies 27 are immersed in the interior of the folding knife cylinder.
• Such a submerged closing body is in the. Fig. 1 shown with a chain line and designated 28 '.
• the gaps 09 each have beveled flanks 29 on their inner surfaces, which, in conjunction with the curved outer shape of the closing body 27, make it easier for the latter to dive into the inside of the folding knife cylinder when it is being adjusted.
• Fig. 3 shows a partial section through a folding knife cylinder according to a further development.
• the narrow saddle segment 07 under which the folding knife can move from the gap 08 to the gap 09 and back, is thinner than the wide segments 06, on each of which the grippers (not shown here) are arranged.
• Fig. 3 shows the folding knife 18 in its retracted, inactive position.
• the tip of the folding knife 18 lies here radially outside the inner surfaces 32 of the segments 06, but inside the inner surface 33 of the segment 07.
• the reduced thickness of the segment 07 makes it possible to reduce the stroke of the folding movement of the folding knife 18 and this nevertheless between the two Columns 08; 09 to divide as needed.
• the reduced stroke of the folding movement also reduces the accelerations to which the folding knife or its spindle 17 are exposed. This allows the folding knife cylinder to be operated at a higher rotational speed and / or to reduce wear.
• FIG. 4 A second further development is shown in FIG. 4 in a section analogous to that of FIG. 3.
• the tip of the folding knife 18 is in the inactive, retracted position of the lifting movement radially between the inner surface 24 and the outer surface of the saddle 03.
• linear actuators here hydraulic cylinders 34, provided in the number of folding blades 18 corresponding number and arranged at the same angular distance.
• One of these hydraulic cylinders 34 is shown in FIG. 4.
• the flange 13 which also carries the folding knife 18, so that it always has the same position with respect to the folding knife 18 assigned to it, regardless of the rotational position of the folding knife cylinder. It has a radially outwardly oriented piston with a piston rod 36 which lies exactly opposite an end region of the lever 21 or the roller 22 mounted on the lever 21 for rolling on the control cam 23. By extending the piston, the roller 22 is lifted off the cam 23, and the folding knife 18 moves beyond the inactive position into that shown in FIG. 4 Position back inside the folding knife cylinder. In this position, as described with reference to FIGS. 1 and 2, the flanges 13, 02 can in turn be rotated relative to one another in order to adjust the folding knives from their position at the gap 08 to those at the gap 09 or back.
• the actuators in a fixed position, in particular on the control curve 23, and to provide the piston rod 36 at its distal end with a curve section facing the roller 22, which is at least so long that the roller 22 during the adjustment of the
• the folding knife 18 can roll from the gap 08 to the gap 09 or back thereon, so as to keep the folding knife 18 at a safe distance from the inner surface 24 during the entire adjustment movement.
• This distance can typically be approximately 1.5 mm.
• the hydraulic cylinder 34 can also be of other types of linear actuators, z. B. those with electromagnetic drive to be replaced.
• FIG. 5 shows a sector of a folding knife cylinder according to a further variant in a view analogous to FIGS. 3 and 4.
• the structure of the rotating parts of the folding knife cylinder is the same as in the above embodiments and is not described again.
• the folding knife 18 is shown here in the retracted position of its folding movement, just before the roller 22 reaches an indentation 37 of the control curve 23, which will cause the folding knife 18 to extend into its active position.
• the roller 22 is wider than the control curve 23.
• a second control curve 38 is shown in FIG. 5 as a dashed outline. It is spaced so far from the control cam 23 during normal operation of the folding knife cylinder that the roller 22 cannot touch it.
• the second control curve 38 has areas 39, 41 with two different radii, the smaller radius of the area 41 being slightly smaller than the radius of the control curve 23 in its area corresponding to the inactive state of the folding knife 18, whereas the larger radius of the area 39 is clear is greater than this value.
• the second control cam 38 is first displaced axially towards the first control cam 23 in its orientation shown in FIG. 5, so that it comes to rest under the roller 22 over at least part of its width.
• the second control cam 38 is then rotated clockwise.
• the roller 22 is supported by the region 39 with a large radius of the second control cam 38, as a result of which the roller 22 is lifted from the first control cam 23 and the folding knife 18 so far inward behind its inactive position shown in FIG. 5 of the folding knife cylinder is withdrawn until the tip of the folding knife 18 lies clearly within the inner surface 24.
• the folding knife 18 can be adjusted in the same way as in the previously described configurations.
• the second control curve 38 is then moved away from the first control curve 23, so that the latter can resume its function of controlling the folding movement.
• folding knife cylinders with three folding knives that can be adjusted between two columns are assumed.
• the invention is also applicable to folding knife cylinders with any number of folding knives and more than two columns.
• a closing body 27 is provided only for the column 09.
• a corresponding closing body could also be arranged on the opposite side of the folding knife 18 in order to close the gap 08 close when the folding knife 18 lies at the gap 09.
• the folding knife (18) is adjusted from a working position in which the folding knife (18) is at least temporarily arranged outside a saddle (03) to a rest position in which the folding knife (18) is arranged inside the saddle (03).
• the folding knife (18) is adjusted with respect to the saddle (03) in the circumferential direction with its tip inside the saddle (03), ie it is moved along under segments (07) of the saddle (03).

Landscapes

• Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=7673904

Family Applications (1)

Country Status (5)

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Family Cites Families (14)

• 2001
  • 2001-02-14 DE DE10106671A patent/DE10106671C2/de not_active Expired - Fee Related
  • 2001-12-06 AT AT01989374T patent/ATE273231T1/de not_active IP Right Cessation
  • 2001-12-06 DE DE50103264T patent/DE50103264D1/de not_active Expired - Lifetime
  • 2001-12-06 US US10/467,173 patent/US6869388B2/en not_active Expired - Fee Related
  • 2001-12-06 WO PCT/DE2001/004588 patent/WO2002064473A1/fr not_active Application Discontinuation
  • 2001-12-06 EP EP01989374A patent/EP1360135B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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