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
• • 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
  • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
  • B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
  • B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting

Definitions

• the present invention relates to a sequential cutting device and its implementation method.
• a known method involves two steps, namely a pre-cutting step on all the lines of the surface of the products which must include a pre-cutting or cutting, then a cutting on the lines of separation between edges. Some lines will therefore receive a pre-cut, then a cut which will somehow cancel the pre-cut by completing the separation of the edges.
• this known technique implements an individual setting of the pre-cutting knives, which makes it possible, among other things, to overcome the problems linked to the uneven wear of the knives in time.
• Another known method requires only one step from the machine, but in this case the knives are not individually adjustable in the pre-cutting and cutting position, but collectively by row.
• the basic idea of the present invention is to produce a sequential cutting device which makes it possible to eliminate one step from the sequence, so as to simplify the process and gain bulk by eliminating a station, while maintaining the possibility of individual adjustment, at least of the pre-cutting position.
• the invention thus relates to a sequential cutting device as defined in claim 1.
• Variants of the device are defined in claims 2 to 13.
• the device according to the invention makes it possible to obtain the grouping into "packs" of a certain number of containers incompatible with the arrangement of these containers in one step, by the fact that it makes it possible to organize a movement of the cutting members or pre-cutting according to specific cycles.
• An automatic format change makes it possible to periodically change, as required, the number of containers assembled in a "pack” when the number and position of these containers on a step is compatible with these "packs".
• the adjustment device for example an eccentric, is advantageously common to said row cutting devices.
• the setting of the pre-cutting position is individual for each cutting device and the setting of the cutting position is the same for all the devices in the row.
• the abutment bridge and / or the tool holder advantageously comprise an open housing, and preferably the abutment bridge and the tool holder each comprise an open housing, these housings being located opposite one of 1 'other.
• At least one said open housing advantageously opens into a said abutment face.
• the eccentric device is preferably housed in at least one said open housing.
• the invention also relates to a method using at least two sequential cutting devices as defined above, characterized in that it comprises the following steps: a) preselect the row or rows according to which pre-cuts must be made and the row or rows according to which cuts must be made; b) selectively placing the cutting elements of each of the devices in their position pre-cutting or in their cutting position in accordance with said pre-selection; c) simultaneously perform the pre-cuts and the cuts in a single operation over a distance corresponding to one step; d) take a step forward and repeat steps a) to c).
• the method can implement a step of individual adjustment of the pre-cutting position of the cutting elements.
• FIG. 3 and 4 show a cutting variant according to the present invention, respectively in the pre-cutting position, and in the cutting position;
• FIG. 5 and 6 show a preferred embodiment of a cutting device 1 according to the invention
• - And Figure 7 shows a positioning device for container supports.
• a known method of making pre-cuts and cuts, for example to produce "packs" 20 of containers, for example pots 1, has three stations PI, P2 and P3.
• the embodiment chosen uses three rows of containers advancing in the direction of the arrow F with a pitch E corresponding to the length X of three containers, while the individual "packs” must have cutting lines 14 spaced apart of a distance d equal to the length 1 of two containers.
• the step p is therefore not a integer multiple of dimension d of "packs", but it is an integer multiple of dimension 1 of individual containers 1.
• the Pi station is a cutting station intended for removing the star-shaped crossing regions 10 located at the intersection of the diagonals of the containers 1 (see box).
• the station P2 is a pre-cutting station which performs the pre-cutting of the longitudinal 11 and transverse lines 12 delimiting the individual containers 1. Such a pre-cutting makes it possible to make the individual pots 1 separable by the user who can take some the content after separation and removal of the remaining part of the film 15 which covers one set of pots and which forms a seal for each of them.
• the station P3 is a cutting station which has cutting knives which are arranged to make cuts 14 for separating the "packs" according to rows I, II and / or III. In the position shown in Figure 1, it is rows I and III which are activated and which come to make cutting lines
• the position Pi (optional) remains identical to that of FIG. 1, while the following position, referenced P, produces in a single operation the lines 11 and 12 of pre-cutting, and the cutting lines 14, but without redundancy, that is to say that the lines 14 are not produced above the pre-cutting lines 12.
• the rows I 'and III' are configured to make cutting lines 14, the row II 'is configured to make a pre-cutting line 12, and the rows IV and V are configured to make the pre-cutting lines 11.
• rows I 1 and II ' are configured to make the pre-cutting lines 12, the row II' is configured to make a cutting line 14 and the situation remains unchanged for rows IV and V.
• rows IV and V are generally equipped with conventional pre-cutting devices that is to say non-sequential.
• FIG. 3 represents a sequential knife cutting device, in the pre-cutting position, while FIG. 4 represents this same device in the cutting position.
• a row includes a plurality of such devices, for example 2 to 8.
• Each of the knife cutting devices has a stop bridge 30 which is a stop piece connected to a fixed piece 35 by means of an individual adjustment device 31, which has an adjustment screw 32 screwed into the fixed piece. 35 and allowing fine adjustment of the vertical position of the abutment bridge 30. This allows individual adjustment of the pre-cutting position of the knives.
• the abutment bridge 30 has a lower face 33 forming an abutment and a semi-cylindrical housing 34 opening into the abutment face 33.
• the cutting knife 28 is disposed at the lower end of a tool holder comprising a rod 24 and a shoe 25 having a flange 41 extending downward from its underside 45.
• the cutting tool is "one piece" (item 24).
• the rod 24 is biased upwards by a spring 23 housed between the upper face 46 of a part 29, which is integral with the frame 35 and which is crossed by the rod 24, and the flange 41.
• the shoe 25 has a face upper 38 forming a stop, and a semi-cylindrical housing 44 which opens into the face forming a stop 38, and which is located opposite the housing 34.
• An eccentric 22 is preferably common to all of the cutting devices of the row.
• the eccentric 22 which is common to all the cutting devices of the same row has a bottom dead center in which its lower part 27 is in contact with the semi-cylindrical housing 44 to shift the shoe 25 downwards, which further increases the cutting depth of the cutting knife 28, hence the cutting position common to all the cutting devices of the same row shown in FIG. 4, in which the faces 45 and 46 of the cutting devices of this row are spaced by the same adjustment distance h.
• the cutting tool is in one piece (item 24) and the device does not have a tool holder, but a spacer 41 is disposed between the tool 24 and the face 45 of the shoe 25.
• the spacer 41 can come directly into abutment on the face 33 of the abutment bridge 30.
• the sequential having a stop bridge is adaptable to any tool one step, two steps or more, which is in place directly on a machine in production.
• the return device is integral with each knife and is placed in a knife holder plate 29.
• the stop-bridge system can be adapted to sequentials using knives placed in the direction of travel and / or in the direction perpendicular to the direction of movement of the containers.
• a variant shown in Figures 5 and 6 implements a knife movement system by connecting rods which allows direct adjustment of the knives and direct action using jacks on the general movement (without passing through a shaft and a rack) .
• the device according to FIGS. 5 and 6 comprises a fixed part 55 in which is housed a cylinder 50 in which a rod 51 is fitted eccentrically. Two cylinders 50 and two rods 51 are preferably used. Each rod 51 is linked operates with the spacer 41 (or with the adjusting screw 31) so that the rotation of the cylinder 50 induces a translation of the screw 31 and / or of the spacer 41 and therefore a displacement of the cutting tool 28 between the pre-cut position shown in Figure 5 and the cut position shown in Figure 6.
• the screw 31 which passes through the part fixed 35 is screwed onto a nut which carries the connecting rods 51 and the rotation of the cylinders 50 produces a translation of the adjusting screw 31 which bears directly on the cutting tool (as shown) or on the spacer 41.
• the device for adjusting the position of the container supports comprises a rod 61 having a threaded end 68 and which connects a cross member to the container support assembly 62, while allowing a position adjustment. , which is carried out as follows:
• a pinion 64 is actuated by a flywheel 65 (or a motor).
• a threaded rod 66 simultaneously produces the raising and lowering of the rod 61, the threaded end 68 of which cooperates with the internal threading of the rod 66, and the rotation of the flywheel 65.
• the assembly includes other rods 61 '(here 3, in all 4 rods) whose displacement is obtained by means of pinions 67 which rotate while being driven by a chain 63 driven by the rotation of the pinion 64.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)
• Fluid-Pressure Circuits (AREA)
• Details Of Cutting Devices (AREA)

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Publications (2)

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ID=9489644

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Cited By (1)

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• 1996
  • 1996-02-28 FR FR9602455A patent/FR2745221B1/fr not_active Expired - Fee Related
• 1997
  • 1997-02-28 EP EP97907150A patent/EP0824456B1/de not_active Expired - Lifetime
  • 1997-02-28 DE DE69705175T patent/DE69705175T2/de not_active Expired - Fee Related
  • 1997-02-28 ES ES97907150T patent/ES2159844T3/es not_active Expired - Lifetime
  • 1997-02-28 WO PCT/FR1997/000360 patent/WO1997031827A1/fr active IP Right Grant

Non-Patent Citations (1)

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