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WO2024252436A1 - Machine d'emballage d'articles discrets - Google Patents

Machine d'emballage d'articles discrets Download PDF

Info

Publication number
WO2024252436A1
WO2024252436A1 PCT/IT2024/050115 IT2024050115W WO2024252436A1 WO 2024252436 A1 WO2024252436 A1 WO 2024252436A1 IT 2024050115 W IT2024050115 W IT 2024050115W WO 2024252436 A1 WO2024252436 A1 WO 2024252436A1
Authority
WO
WIPO (PCT)
Prior art keywords
machine
wrapper
station
ordered groups
folding
Prior art date
Application number
PCT/IT2024/050115
Other languages
English (en)
Inventor
Tommaso Venturelli
Fabio Sassi
Original Assignee
I.M.A. Industria Macchine Automatiche S.P.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by I.M.A. Industria Macchine Automatiche S.P.A. filed Critical I.M.A. Industria Macchine Automatiche S.P.A.
Publication of WO2024252436A1 publication Critical patent/WO2024252436A1/fr

Links

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
    • B65B35/00—Supplying, feeding, arranging or orientating articles to be packaged
    • B65B35/30—Arranging and feeding articles in groups
    • B65B35/44—Arranging and feeding articles in groups by endless belts or chains
    • 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/08—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path
    • B65B11/10—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path to fold the wrappers in tubular form about contents
    • 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/18—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in two or more straight paths
    • B65B11/20—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in two or more straight paths to fold the wrappers in tubular form about contents
    • B65B11/22—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in two or more straight paths to fold the wrappers in tubular form about contents and then to form closing folds of similar form at opposite ends of the tube
    • 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/28—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a curved path, e.g. on rotary tables or turrets
    • 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/38—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a combination of straight and curved paths
    • B65B11/40—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a combination of straight and curved paths to fold the wrappers in tubular form about contents
    • B65B11/42—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a combination of straight and curved paths to fold the wrappers in tubular form about contents and then to form closing folds of similar form at opposite ends of the tube
    • 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/58—Applying two or more wrappers, e.g. in succession
    • 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
    • B65B19/00—Packaging rod-shaped or tubular articles susceptible to damage by abrasion or pressure, e.g. cigarettes, cigars, macaroni, spaghetti, drinking straws or welding electrodes
    • B65B19/02—Packaging cigarettes
    • B65B19/22—Wrapping the cigarettes; Packaging the cigarettes in containers formed by folding wrapping material around formers
    • B65B19/223—Wrapping the cigarettes; Packaging the cigarettes in containers formed by folding wrapping material around formers in a curved path; in a combination of straight and curved paths, e.g. on rotary tables or other endless conveyors
    • 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
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/005—Packaging other articles presenting special problems packaging of confectionery
    • 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
    • B65B49/00—Devices for folding or bending wrappers around contents
    • B65B49/12—Rotary folders
    • 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
    • B65B49/00—Devices for folding or bending wrappers around contents
    • B65B49/14—Folders forming part of, or attached to, conveyors for partially-wrapped articles
    • 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
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/04—Machines constructed with readily-detachable units or assemblies, e.g. to facilitate maintenance

Definitions

  • the present invention concerns a machine for packaging discrete items, in particular with a wrapper which can be either single or double layer.
  • the discreet items to be packaged are food items, such as confectionery such as sweets, chewing gum, chocolates, biscuits or other similarly sized foods.
  • a predefined number of such items is grouped to form a group of items, which is subsequently wrapped with said wrapper, in a single or double layer.
  • Pocket-sized packages of chewing gum in the form of rigid and compact bars, have long been known.
  • This chewing gum can be marketed in packages in which an ordered group of items is wrapped in a first wrapper, consisting of a sheet of wrapping material, and possibly also by a second wrapper, consisting of a second sheet of wrapping material, which is wrapped around the first wrapper.
  • the second wrapper is closed by welding, for example by activating a sealing wax previously applied on the internal surface of the second wrapper, or by directly welding the second wrapper, if it is made of heat-sealable material.
  • Packaging machines that carry out the packaging of the chewing gum grouped into ordered groups of items are also known.
  • a first type of known machines is configured to carry out a packaging with a single layer wrapping, while a second type of known machines is configured to carry out a packaging with a double layer wrapping.
  • Each of these types is specifically designed to carry out the packaging with a precise wrapping material for candies with pre-established shape and sizes.
  • known machines do not allow to pass from a single layer packaging to a double layer one, or vice versa, and they are also constrained to a predetermined size of the discrete items, as well as to their pre-established number in the ordered groups to be packaged.
  • known machines are configured to make the wrappers with usually plastic-based wrapping materials, which are therefore not very eco-sustainable.
  • Known machines are therefore not able to carry out the packaging using eco- sustainable materials, that is, of at least partly natural origin, which are recyclable or compostable.
  • one purpose of the present invention is to provide a machine for packaging discrete items which is convertible and capable of performing the packaging of both single layer wrappers and also double layer wrappers, according to requirements.
  • Another purpose of the present invention is to provide a machine which is more compact in size compared to the machines of the first and second type known in the state of the art.
  • Another purpose of the present invention is to provide a machine for packaging discrete items which allows to package, with substantially simple and rapid machine set-up operations, packages comprising a number of items which can be selected by the operator, as well as the shape and sizes of each discreet item to be packaged.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a machine according to the present invention for packaging discrete items alternatively selected either according to a double layer wrapping configuration or according to a single layer wrapping configuration comprises, in succession, a feed station configured to feed the discrete items in ordered groups, conveyor devices of rotating type comprising a plurality of wheels rotatable around respective axes of rotation, each of these wheels having a plurality of peripheral pockets configured to accommodate each at least one of the ordered groups of discrete items, at least a first and a second feed stations configured to feed an internal wrapper and an external wrapper, respectively, first and second folding members configured to fold an internal and external wrapper around each of the ordered groups, respectively.
  • the machine further comprises an operating station arranged downstream of the first feed station and upstream of the second feed station, and having a modifiable set-up which is a function of the selected wrapping configuration
  • the operating station comprises a first conveying device configured to close the internal wrapper around the ordered groups and to convey the ordered groups at least partly wrapped in the internal wrapper towards the second folding members, which close the external wrapper around the internal wrapper already wrapped around the ordered groups when the machine operates according to the double layer wrapping configuration, and a second conveying device comprising a rotatable wheel of a plurality of wheels which is configured to convey the ordered groups towards the second folding members without any internal wrapper wrapped therearound, so that the second folding members close the external wrapper around the ordered groups, when the machine operates according to the single layer wrapping configuration.
  • the first and second devices are installed in a removable manner in the operating station, one as an alternative to the other.
  • the first feed station feeds a first wrapping sheet intended to form the internal wrapper
  • the second feed station feeds a second wrapping sheet intended to form the external wrapper
  • the first conveying device comprises an advancing member configured to make the ordered groups of discrete items partly wrapped in the internal wrapper advance, and a drive mechanism for driving the advancing member.
  • the advancing member is configured to be displaced between an active position, in which the advancing member is moved along a channel of the first conveying device, and an inactive position, in which the advancing member is displaced distanced from the channel and moved back towards the first feed station in a cyclical manner.
  • the channel comprises at least a horizontal support configured to restingly receive the ordered groups and allow their sliding when moved by the first conveying device.
  • the advancing member comprises pushing members configured to cooperate with the channel from below, when the machine is operated in the double layer wrapping configuration.
  • the advancing member is configured to be positioned between a raised active position to move the ordered groups, and a lowered resting position to allow the second conveying device to be put in place instead of the first conveying device.
  • the drive mechanism is mounted on a support body which is movable mounted on the machine to be displaced between a working position, in which the drive mechanism can drive the advancing member for moving the ordered groups partly wrapped by the internal wrapper, when the machine is operated according to the double layer wrapping configuration, and a resting position, below the working position, in which the drive mechanism is placed at a certain distance from the second conveying device in order to not interfere with it, when the machine is operated according to the single layer wrapping configuration.
  • the support body is movable mounted, preferably slidingly, on the machine, that is, on a frame thereof.
  • the drive mechanism comprises a first motor configured to move the advancing member according to a horizontal direction and a second motor configured to move the advancing member according to a vertical direction.
  • the machine comprises a closing and welding station configured to close and weld the external wrapper.
  • the station for closing and welding the external wrapper comprises a plurality of welding members configured to weld the external wrapper. This allows to adjust the intensity of the welding according to the wrapping material used.
  • the plurality of welding members comprises a first series of upper welding members, configured to weld the external wrapper at an upper longitudinal side of the ordered groups, followed by a second series of lateral welding members configured to weld the external wrapper at the ends of the ordered groups.
  • the machine comprises a single linear conveyor for conveying the ordered groups of discreet items, wrapped at least in the external wrapper, through the station for closing and welding the external wrapper and, subsequently, towards the exit station.
  • the exit station further comprises a pair of lateral conveyors, each located on a respective side with respect to the ordered groups of discreet items wrapped at least in the external wrapper, so as to accompany the newly welded ends of the external wrappers. This allows to safeguard the welds of the ends, preventing them from sliding against a stationary surface while they cool.
  • At least one of either a station for conveying and folding the internal wrapper or a station for conveying and folding the external wrapper is equipped with a damper member configured to accompany the insertion of the ordered groups of discreet items and of the corresponding wrapper, if present, inside a respective seating.
  • the at least one of either the station for conveying and folding the internal wrapper or the station for conveying and folding the external wrapper comprises one of the conveyor devices of rotating type equipped with the seatings for receiving the ordered groups of discreet items, and which comprises the damper member able to be displaced between a retracted position, in which it is completely contained within the overall size of the conveying device, and an extended position, in which at least one end thereof protrudes from one of the seatings, so that it is the first to come into contact with the ordered groups of discreet items.
  • each of either the station for conveying and folding the internal wrapper or the station for conveying and folding the external wrapper comprises a respective wheel comprising a body with a central cavity and an external wall with a circular section in which a plurality of seatings are created, which are configured to receive the ordered groups of discrete items.
  • Each seating comprises a bottom equipped with a longitudinal slot.
  • the damper member is located inside the central cavity and has a plate-shaped body configured to pass through the longitudinal slot of the bottom of the seatings.
  • each damper member is able to be displaced between a retracted position, in which it is completely contained in the central cavity, and an extended position, in which at least one end thereof protrudes from the longitudinal slot and is positioned inside the corresponding seating.
  • - fig. 1 is a partial and schematic longitudinal section view of a machine for packaging discrete items according to the present invention, in a first operating configuration;
  • - figs. 2a and 2b are three-dimensional views of packaged discrete items, each in a respective variant;
  • - figs. 3, 4 and 6 are detailed and enlarged longitudinal section views showing different operating stations of the machine of fig. 1;
  • - fig. 5 is a schematic three-dimensional section view of a device comprised in the operating station shown in fig. 4;
  • - figs. 7 and 8 are three-dimensional views, on an enlarged scale, of other details of the machine of fig. 1 , fig. 8 also being partly sectional;
  • - fig. 9 schematically shows the operating flow of a group of discrete items to be packaged by means of the machine in the first operating configuration of fig. 1 ;
  • - fig. 10 is a partial and schematic longitudinal section view of some operating stations of the machine of fig. 1, in which the machine is arranged in a second operating configuration;
  • FIG. 11 schematically shows the operating flow of a group of discrete items to be packaged by means of the machine arranged in the second operating configuration visible in fig. 10.
  • a machine 10 is configured to package ordered groups 101 of discrete items 100, such as confectionary such as sweets, chewing gum, chocolates, biscuits or foods in general, wherein each group comprises a predetermined number of discrete items, for example ten items.
  • discrete items 100 such as confectionary such as sweets, chewing gum, chocolates, biscuits or foods in general, wherein each group comprises a predetermined number of discrete items, for example ten items.
  • the discrete items 100 are preferably chewing gum in the form of a substantially rectangular candy, of a known type.
  • the nature of the packaged discrete items can also be different, for example even products belonging to sectors other than the food sector, and does not constitute a limitation of the scope of protection of the present invention.
  • Each ordered group 101 of items 100 therefore has an elongated shape in which a plurality of longitudinal sides 102 extend between two opposite ends 103.
  • a plurality of longitudinal sides 102 extend between two opposite ends 103.
  • four longitudinal sides 102 are provided, that is, one for each perimeter side of the items (fig. 2a and 2b).
  • the machine 10 allows to package these discrete items 100 according to two different packaging configurations: with a double layer wrapping or with a single layer wrapping.
  • an internal wrapper 201 is provided directly in contact with the group 101 of discrete items 100, and in an external wrapper 202 that wraps around the internal wrapper 201 (fig. 2a).
  • Each of the wrappers 201, 202 consists of a respective sheet of a suitable wrapping material cut to size.
  • the material of these wrappers can comprise cellulosic based materials, such as paper, plastic materials, materials suitable to define a barrier effect to protect the products from moisture, such as foil or metallized paper for example.
  • the sheet is folded in a known manner around the group 101 of discrete items 100, so as to keep the discrete items 100 belonging to the same group 101 grouped together in a stable manner.
  • a single wrapper is provided, wrapped directly in contact with the group 101 of discrete items 100 and consisting of the external wrapper 202, also made of a suitable wrapping material, such as those listed above for example.
  • FIG. 1 shows an operating configuration of the machine 10 which allows to obtain a package like the one shown in fig. 2a, in which there is a double layer wrapping.
  • the machine 10 comprises a feed station S 1 equipped with a vibrating reorderer 11 in which the discrete items 100 are fed in bulk, and from which they automatically fall by gravity into a channeling device 12.
  • the channeling device 12 comprises a plurality of channels, not shown and preferably arranged parallel and adjacent to each other, which are configured to lead the discrete items 100 from the feed station S 1 towards the next processing station.
  • An ordered group of discrete items 100 forms within each channel.
  • a respective item exits from each channel.
  • all the items exiting from the channels are arranged in order and side by side to form the group 101.
  • the channeling device comprises the same number of channels.
  • the group 101 is oriented so as to extend along a longitudinal axis, which is substantially horizontal.
  • At least one control device 14 associated with the channeling device 12 and configured to control the discrete items 100 during their descent in order to detect, for example, any clogging or the absence of the items or their possible damage.
  • the control device 14 is advantageously of the optical type and comprises, for example, a video camera.
  • the machine 10 comprises a first transfer station S2, comprising a conveyor wheel 13.
  • the group 101 enters the conveyor wheel 13 (figs. 1 and 3) for conveying the items 100, which has an axis of rotation R1 substantially parallel to the longitudinal axis of the group 101.
  • the conveyor wheel 13 for conveying the items 100 comprises a plurality of pockets 15, angularly distributed along the circumference of the wheel 13 and open towards the outside.
  • Each pocket 15 acts as a seating and is configured to receive a respective group 101 so as to ensure that it keeps its orderly arrangement in the absence of any element that constrains it together, given that in this operating position of the machine 10 the group 101 is formed only by a plurality of items side by side, without any wrapper wrapping them together.
  • the internal sizes of each pocket 15 substantially correspond to the external sizes of a group 101, as formed at the exit of the channeling device 12.
  • the pockets 15 are rectangular in shape and oriented with a longitudinal axis substantially parallel to the axis of rotation R1 of the wheel 13, so that the groups 101 are also oriented parallel to this axis.
  • the wheel 13 has eight pockets 15 distanced from each other by an angle of 45°.
  • the wheel 13 is connected to a respective motor member (not shown for simplicity), preferably of the brushless type, and configured to drive the wheel with a stepwise alternating motion with a unidirectional direction of rotation, for example in a counterclockwise direction.
  • the motor member makes the wheel rotate by an angle of 45° with each step.
  • a reject zone 16 is provided, located for example below the wheel 13, although other positions are possible.
  • the wheel 13 comprises two pusher members 17, 18 configured to push the groups 101 out of the pockets 15.
  • the bottom wall of the pockets 15 comprises at least one passage hole for the pushers, not shown.
  • a first pusher member 17 is arranged at the reject zone 16 (fig. 3) so as to push the group 101 out of the respective pocket 15 in the event that the control device 14 has detected that this group does not comply with quality standards.
  • the second pusher member 18 is configured to push the group 101 out of the respective pocket 15 at an exit station from the conveyor wheel 13, towards the next processing station (fig. 3).
  • Each pusher member 17, 18 is shaped in such a way that it can interact with all the items 100 of the group 101 to prevent any isolated items from accidentally remaining inside the pockets.
  • Each pusher member 17, 18 is movable between a resting position, in which the pusher member 17, 18 is entirely contained in a compartment inside the wheel (fig. 3), and a pushing position, in which at least an end portion of the pusher member 17, 18 exits into the pocket 15 to push out the items 100.
  • the machine 10 comprises a first feed station S3, at which a sheet 19 of wrapping material is fed, intended to form the internal wrapper 201 of the packaging with double layer wrapping.
  • the sheet 19 of wrapping material is preferably fed along a vertical plane, parallel to the orientation of the channeling device 12, by a corresponding reel (not shown), for example located above the first wrapper feeding station S3.
  • the sheet 19 arrives at the first wrapper feeding station S3 in such a way as to intersect the path of the group 101 pushed by the second pusher member 18, so that the group 101 hits against the sheet.
  • the latter is preferably pre-cut so as to automatically detach from the reel thanks to the force of the impact of the group 101 advancing against the sheet.
  • a conveying and folding station S4 comprising a wheel 20 rotatable around an axis of rotation R2 which is parallel to the axis of rotation R1 of the wheel 13.
  • the wheel 20 is configured to convey the group 101 together with the sheet 19 associated therewith in the wrapper feeding station S3, and at the same time to carry out a predetermined sequence of folds of the sheet 19 in order to define the wrapping of the internal wrapper 201 around the group 101.
  • the wheel 20 comprises a plurality of pockets 21, for example eight pockets in the example shown, which are configured as seatings angularly distributed around its circumference and oriented parallel to its axis of rotation R2 (figs. 1, 3 and 4).
  • the conveying and folding wheel 20 is driven with an alternating motion with a unidirectional step, in a clockwise direction.
  • the wheel 20 comprises a damper member 22 configured to accompany, in a controlled manner, the entry of the assembly formed by the group 101 and by the corresponding sheet 19 into the pockets 21 of the wheel 20.
  • the damper member 22 is substantially aligned with the second pusher member 18.
  • the damper member 22 is movable between an active position, in which its end that comes into contact with the sheet 19 is located inside the pocket 21, at the position of entry of the group 101 and of the sheet 19 associated therewith into the wheel 20, and an inactive position, in which the damper member 22 is outside the pockets 21, in a compartment inside the wheel 20.
  • the damper member 22 When the damper member 22 is in the active position, it cooperates with the second pusher member 18 which is pushing a group 101 of items 100.
  • the second pusher member 18 and the damper member 22 are displaced together, in particular towards the right in figs. 1 and 3, striking the assembly formed by the group 101 and the sheet 19, one at the front and one at the rear, so as to accompany and cushion its entry into the wheel 20, thus preventing the items 100 from hitting the walls of the pocket 21.
  • the damper member 22 advantageously also allow to keep the sheet 19 positioned against the group 101 during the insertion in the pocket 21.
  • the wheel 20 also comprises a third pusher member 23 configured to push the items 100 out of the pockets 21 when the latter reach the position of exit towards the next processing station.
  • the wheel 20 is provided with first folding members 24 for folding the sheet 19 around the group 101 so as to form the internal wrapper 201.
  • the first folding members comprise a fixed element, located upstream of the wheel 20, at the first transfer station 27.
  • the first folding members 24 in turn comprise a folding channel 25 delimited by an upper wall 26 and two lateral walls 27, with respect to the direction of transfer of the items 100. These upper 26 and lateral walls 27 allow to automatically carry out a first fold of the wrapping sheet 19 along a longitudinal side 102 of the ordered group 101 of items 100 and at its ends 103.
  • the first folding members 24 have a lower wall which, in addition to sustaining the items 100, performs another fold along a second longitudinal side 102 of the group 101, opposite to the longitudinal side 102 at which the first fold of the sheet 19 is made. Alternatively, these last two folds can be performed while the group
  • the upper wall 26 of the first folding members 24 also comprises a rear edge 26A positioned flush with the wheel 20 and coaxial therewith, so as to cause a second fold of the sheet 19 of wrapping material along a second longitudinal side 102 of the group 101 of items 100, when the wheel 20 is rotated clockwise.
  • a second transfer station S5 is provided downstream of the internal wrapper conveying and folding station S4, in which the third pusher member 23 pushes a group 101, partly wrapped in the sheet 19 of wrapping material, out of a pocket 21 towards the next processing station (figs. 1 and 3), which is configured as an operating station S6, which will be described in detail below.
  • the operating station S6 comprises a first conveying device 28 (fig. 4), configured to convey the group 101 partly wrapped in the sheet 19 of wrapping material, which has been partly folded thereon by the first folding members 24 associated with the wheel 20, and to simultaneously complete the folds of the same sheet 19 so as to close the internal wrapper 201 around the group 101.
  • the first conveying device 28 is removably mounted on the machine 10, in the operating station S6.
  • the first conveying device 28 comprises a rectilinear channel 29 inside which the group 101 is made to advance stepwise (fig. 5).
  • the channel 29 is delimited at the upper part by a series of abutment bars 30, laterally by two lateral walls 31 and at the lower part by a lower wall 32, which defines a horizontal support for the items 100, the lower wall 32 being provided with one or more longitudinal slits 33 extending for the entire length of the channel 29 (fig. 5).
  • folding means forming part of the first folding members 24 operate additional folds of the sheet 19 to finish the formation of the internal wrapper 201.
  • These folding means can be associated with the lateral walls 31 and operate at the upper part, for example being configured as the upper bars 30 or other folding member (such as continuous bars).
  • the lateral walls 31 are each equipped, as folding means, with two inclined slots 34 A, 34B which act as folding means to perform the last folds of the sheet 19 at the ends 103 of the group 101 of items 100
  • the first conveying device 28 comprises an advancing member 35, for example configured as a comb member, arranged below the channel 29 for advancing the groups 101 stepwise therein.
  • the comb member 35 comprises one or more rows 36 of teeth, arranged in such a way as to pass through the longitudinal slits 33 of the lower wall 32 and thus enter the channel 29 in order to be able to push the groups 101 forwards.
  • Each row 36 comprises a plurality of teeth 37 so as to be able to push the groups 101 for the entire length of the channel 29.
  • the stepwise advance of the groups 101 along the entire channel 29 is achieved thanks to a cyclical drive of the advancing member 35. More precisely, the comb member is raised so that its teeth 37 enter the channel 29 vertically (fig. 5), then it is made to advance forwards in order to push a group 101 inside the channel 29, then it is lowered so as to no longer interfere with the groups 101 arranged in the channel 29, and finally it is moved backwards to its starting position. This movement cycle is then repeated to operate the advance of the groups 101 in succession along the channel 29.
  • the first conveying device 28 comprises a drive mechanism 38, of a known type (figs. 1 and 10).
  • the drive mechanism 38 is mounted on a support body 38A which is slidingly mounted vertically on a guide 38b attached on a frame of the machine 10. In this way, the advancing member 35, together with the drive mechanism 38, can be displaced between a raised position (fig. 1), in which the teeth 37 of the advancing member 35 can be inserted in the channel 29, and a lowered position (fig. 10).
  • connection members for example mechanical, can be provided interposed between the drive mechanism 38 and the advancing member 35, whereby only the latter is displaced between the raised position and the lowered position, while the drive mechanism 38 remains fixed.
  • the advancing member 35 is displaceable, in a known manner, between an active position, in which it is raised and interacts with the ordered groups 101 in transit along the channel 29 (as visible in fig. 4), and an inactive position, in which it remains outside the channel 29, in particular below it, and therefore cannot interact with the groups 101 in the channel 29.
  • the advancing member 35 can be displaced along the channel 29 while it is in the active position, in order to make the ordered groups 101 advance, and is then displaced backwards when it is in the inactive position, so as to avoid moving the ordered groups 101 backwards.
  • the machine 10 comprises a third transfer station S7 in which the groups 101 are transferred from the first conveying device 28 towards a wheel 40 for conveying groups and folding the wrapper.
  • a second wrapper feeding station S8 is provided, in which a second sheet 39 of wrapping material is fed which, in the version described here, acts as external wrapper 202.
  • the second sheet 39 is fed along a vertical plane that is substantially parallel to the plane along which the sheet 19 is fed.
  • This second sheet 39 is unwrapped by a corresponding reel, not shown, located above the second wrapper feeding station S8, and it is pre-cut to size, remaining connected to the rest of the reel by means of one or more attachment points configured to tear when the groups 101 hit the second sheet 39.
  • the force exerted by the groups 101 that are advancing against the second sheet 39 is such as to determine the tearing of the attachment points and therefore the detachment of the sheet itself, which remains associated with the group 101 in transit, which is already wrapped by the internal wrapper 201.
  • the machine 10 After the second wrapper feeding station S8, the machine 10 comprises a station S9 for conveying and folding the external wrapper, which comprises the group 101 conveying and wrapper folding wheel 40, completely similar to the conveying and folding wheel 20, with the difference that, from an operational point of view, it conveys the groups 101 of items 100 already wrapped in the internal wrapper 201.
  • a station S9 for conveying and folding the external wrapper which comprises the group 101 conveying and wrapper folding wheel 40, completely similar to the conveying and folding wheel 20, with the difference that, from an operational point of view, it conveys the groups 101 of items 100 already wrapped in the internal wrapper 201.
  • the group conveying and wrapper folding wheel 40 is rotatable around an axis of rotation R3 parallel to the axes of rotation Rl, R2 of the previously described wheels 13, 20 and comprises a plurality of pockets 41, eight in the example shown, configured as seatings suitable for housing each a group 101 of items 100 completely wrapped in the internal wrapper 201 and partly wrapped by the second sheet 39 intended to define the external wrapper 202.
  • the wheel 40 also comprises second folding members 42 located between it and the second wrapper feeding station S8, and which are identical in structure and operation to the previously described first folding members 24.
  • the wheel 40 further comprises a second damper member 43 and a fourth pusher member 44, identical to the damper member 22 and the third pusher member 23, respectively, both in terms of structure and operation, and also in terms of their relative position with respect to the wheel 40.
  • the second damper member 43 is configured to accompany the entry of the group 101 of items 100 into the pocket 41 at the third transfer station S7, in cooperation with the advancing member 35 which - in addition to making the groups advance along the channel 29 - is also configured to transfer the groups 101 through the third transfer station S7 to the inside of the pockets 41.
  • the fourth pusher member 44 is configured to push the group 101, partly wrapped in the second sheet 39, towards a fourth transfer station S10, located substantially in a position diametrically opposite the third transfer station S7, with respect to the wheel 40.
  • the wrapper is folded substantially around four longitudinal sides 102 of the group 101, and is also folded at the ends 103 at only the rear side of the group 101, with respect to the direction of feed.
  • the fold of the rear side of the end 103 occurs during the transit of the group 101 from the wheel 40 to the following station.
  • a station Si l for closing and welding the external wrapper 202 comprising a device 45 for closing and welding the external wrapper 202.
  • an exit station S12 of the packaged groups 101 (figs. 7 and 8).
  • the ordered groups 101 of items 100 are fed through the closing and welding station Si l to the exit station SI 2 by means of a conveyor 46 comprising, for example, two endless belts 47 located parallel to each other, on each of which there are mounted a plurality of first attachment elements 48, each provided with a first tooth 49, and a plurality of second attachment elements 50, each provided with a respective second tooth 51 (figs. 1, 6, 7 and 8).
  • the first teeth 49 have a substantially triangular shape with a front edge 49A substantially perpendicular to the direction of advance A of the ordered groups 101 of items and configured to push a group 101 of items 100, and a rear edge 49B.
  • the second teeth 51 have shape and sizes similar to those of the first teeth 49.
  • a second tooth 51 followed by a first tooth 49 form between them a space with two edges parallel to each other (figs. 1 and 6), inside which an ordered group 101 of items 100 is placed.
  • the first teeth 49 act as pushing teeth
  • the second teeth 51 act as contrasting teeth, to stop the travel of the groups 101 pushed by the fourth pusher member 44, when they leave the wheel 40 to enter the station S 11 for closing and welding the external wrapper 202, where they are received by the conveyor 46.
  • the closing and welding device 45 comprises a tunnel 52 which, for a first segment 52A, is delimited at the upper part by an initial upper wall 53, which also acts as a folding member to perform a fold of the second sheet 39 on the last longitudinal side 102 of the group 101, and subsequently by a plurality of upper welding members 54 arranged in succession and configured to weld the second sheet 39 in order to close the external wrapper 202 on the longitudinal side 102 of the groups 101 which is oriented upwards, this longitudinal side containing the end flap of the second sheet 39.
  • the upper welding members 54 are arranged at the longitudinal positions in which the groups 101 stop with each advancing step, so that the welding is performed in several repeated phases, for a short time, on the external wrapper 202 while the group 101 is temporarily stationary between one advancing step and the next.
  • the upper welding members 54 which are in a raised position during the movement of the groups 101, are lowered into contact with the same temporarily stationary groups 101 below.
  • the conveyor 46 can be driven with continuous motion, determining a non-stop movement of the groups 101 to be welded.
  • the upper welding members 54 are always kept in a lowered position, so that the groups 101, when they are displaced along the first segment 52A of the tunnel 52, remain in contact with them, thus allowing to perform the upper welding.
  • first segment 52A of the tunnel 52 is delimited laterally by two lateral walls 55, each provided with slots similar to the slots 34A, 34B in the channel 29 of the first conveying device 28, which form further folding means comprised in the second folding members 42 for folding the last flaps of the sheet 39 at the ends 103 of the group 101 of items 100, similarly to what described for the slots 34A, 34B of the channel 29 of the first conveying device 28.
  • the tunnel 52 comprises a second segment 52B, consecutive to the first, delimited at the upper part by an upper wall (not visible in the drawings) and laterally by a series of lateral welding members 57, configured to weld the sheet 39 at the ends 103 of the groups 101 of items 100, closing the external wrapper 202 (figs.
  • the closing and welding device 45 comprises six upper welding members 54 and at least two pairs of lateral welding members 57, the latter having a longitudinal extension substantially corresponding to the longitudinal extension covered by the six upper welding members 54.
  • the tunnel 52 is delimited at the lower part by a lower wall 58 on which the groups 101 are made to slide by the conveyor 46, wherein the lower wall 58 is interposed between the two endless belts 47, below them, so as to allow the teeth 49, 51 to enter the tunnel 52 (figs. 7 and 8).
  • the exit station S12 comprises a pair of lateral conveyors 59 driven with alternating motion so as to accompany the packaged groups 101 to the exit from the machine 10 (figs. 7 and 8). Substantially, these lateral conveyors 59 allow to have lateral walls that are displaced with the packaged groups 101, preventing the welds at the ends 103 of the groups 101, just performed and not yet cooled, from being dragged against a fixed wall. This allows the newly made welds to be protected from external stresses and ensures that they consolidate optimally while the groupslOl advance towards the exit.
  • the operation of the machine 10 for packaging discrete items 100 described heretofore, in its operating configuration for making a double layer wrapping comprises the following steps.
  • the operating flow of the ordered groups 101 of items 100 is shown in fig. 9.
  • the ordered groups 101 of items 100 are formed in the feed station SI, in particular at the exit of the channeling device 12, on the left in fig. 9.
  • the formed groups 101 fall into the wheel 13, which rotates stepwise in a counterclockwise direction.
  • the number and conformity of the items 100 are checked by means of the control device 14.
  • the wheel 13 rotates by 45°, so that there is always a pocket 15 thereof aligned with the channeling device 12.
  • the group 101 After having travelled 180°, the group 101 is located at the reject zone 16, where it is possibly expelled from the wheel 13 by means of the first pusher member 17, if the group 101 comprises a defective or missing item.
  • the compliant groups 101 travel a further 90° in a counterclockwise direction until they are in front of the first transfer station S2, in which they are pushed out of the wheel 13 by the second pusher member 18.
  • the extension of the second pusher member 18 is such that it pushes the group 101 through the first wrapper feeding station S3, in which the sheet 19 is fed, until it is introduced in a pocket 21 of the wheel 20, in the station S4 for conveying and folding the internal wrapper 201.
  • the first damper member 22 is extended so that it is the first to come into contact with the group 101 and the sheet 19, and it retracts so as to accompany the travel of the group 101 all the way to the bottom of the pocket 21.
  • the group 101 and the sheet 19 meet the first folding members that operate a double fold of the sheet 19 along two opposite longitudinal sides 102 (oriented upwards and downwards) and, at the same time, a fold of a first flap at the ends
  • the first sheet 19 is then wrapped in a C-shape on three longitudinal sides 102 of the group 101 when it is inserted in the pocket 21 , before the wheel 20 starts to rotate in a clockwise direction. This configuration is visible in position Pl in fig. 9.
  • the wheel 20 is driven to complete a first step of 45°, which causes a second fold of the sheet 19 on the fourth longitudinal side 102 of the group 101 (position P2).
  • the group 101 has completed an angle of 180° starting from position Pl, it is located in front of the second transfer station S5, in which it is pushed by the third pusher member 23.
  • This push causes the transfer of the group 101 into the first conveying device 28, located in the operating station S6 (position P3).
  • the sheet 19 is folded further, so as to fold its last part onto the first longitudinal side 102 of the group 101, and thus conclude the longitudinal wrapping.
  • the group 101 is made to advance by a first step along the channel 29, which causes a fold of a front flap in each of the ends 103 of the group 101 (position P4).
  • the second step completed by the group 101 in the channel 29 causes the fold of the upper flap of the two ends 103, by means of the first slot 34A (position P5), while the third step (immediately following the second step) causes the fold of the lower flap at the two ends 103, by means of the second slot 34B (position P6).
  • the internal wrapper 201 is completely folded and closed around the group 101, which is located at the end of the channel 29 facing the third transfer station S7 and the second wrapper feeding station S8.
  • the group 101 is then pushed by the last tooth 37 of the advancing member 35 through the second sheet 39, fed into the second wrapper feeding station S8, and passes through the second folding members 42 to then reach a pocket 41 of the wheel 40, in the corresponding station S9 for conveying and folding the external wrapper 202.
  • the second sheet 39 has undergone the same folds as the first sheet 19 in position Pl, and it is folded in a C-shape on three longitudinal sides 102 of the group 101.
  • the wheel 40 is made to rotate by a first step of 45°, which causes the fold of the second sheet 39 on the fourth longitudinal side 102 of the group 101 (position P9) similarly to what described for the first sheet 19 in position P2.
  • the group 101 completes a 180° path from position P7 and reaches the fourth transfer station S10, through which it is pushed by the fourth pusher member 44 into the tunnel 52 of the device 45 for closing and welding the external wrapper 202, in the closing and welding station S 11. Entering this closing and welding device 45, the second sheet 39 is automatically folded once again onto the first longitudinal side 102 of the group 101, completing the longitudinal wrapping (position P9).
  • the three successive advances by one step allow to subsequently perform the fold of the front flap, of the lower flap and of the upper flap of the ends 103 of the group 101 , by means of the lateral walls 55 of the tunnel 52 and the corresponding slots, respectively.
  • the second sheet 39 is welded on the upper side by the upper welding members 54.
  • the external wrapper 202 is welded at the ends 103 of the groups 101, which then enter the exit station 12 where they are accompanied by the lateral conveyors 59 to the exit of the machine 10.
  • the machine 10 can be easily converted between an operating configuration for producing a packaging with double layer wrapping, in which both the internal wrapper 201 and also the external wrapper 202 are present (fig. 2a), and an operating configuration for producing a packaging with single layer wrapping, in which the only wrapper present is the external wrapper 202, formed starting from the sheet 39 (fig. 2b).
  • the operating configuration of the machine 10 for producing a packaging is shown in fig. 10, while the operating flow followed by the groups 101 of items in this embodiment is shown schematically in fig. 11.
  • the function of the first conveying device 28 is performed by a second conveying device 60, for example configured as a wheel rotatable around an axis of rotation R4 thereof, parallel to the axes of rotation Rl, R2, R3 of the other wheels 13, 20, 40.
  • the wheel of the second conveying device 60 which is interposed between the second transfer station S5 and the third transfer station S7, has a similar structure to the other wheels since it comprises a plurality of pockets 61 distributed angularly.
  • the wheel of the second conveying device 60 is driven with a unidirectional alternating movement, in this case in a clockwise direction.
  • the wheel of the second conveying device 60 shown here comprises sixteen pockets 61 and has a larger diameter than the other wheels of the machine. With each drive thereof, the wheel of the second conveying device 60 travels an angle substantially equal to 22.5°. Obviously, the number of pockets can vary based on requirements, which will affect the angle traveled with each angular step.
  • the pockets 61 are similar to the pockets of the other wheels, that is, they are configured as seatings open towards the outside of the wheel of the second conveying device 60 and comprise an open bottom to allow the passage of a pushing member.
  • the advancing member 35 and the corresponding drive mechanism 38 are lowered into an inactive position, so as to allow the insertion of the second conveying device 60 (fig. 10).
  • the advancing member 35 and its drive mechanism 38 are not used and therefore remain stationary.
  • the wheel of the second conveying device 60 comprises a third damper member 62, similar to the other damper members 22, 43, oriented towards the second transfer station S 5 so as to accompany the entry of the ordered groups 101 of items 100 into the pockets 61, in a manner similar to that already described previously with reference to the other wheels 20, 40.
  • the wheel also comprises a fifth pusher member 63 oriented towards the third transfer station S7 so as to push the items 100 out of the pockets 61, through the third transfer station S7 and the second wrapper feeding station S8, up to the wheel 40.
  • the third damper member 62 and the fifth pusher member 63 are movable in a substantially radial direction of the wheel, actuated by respective actuator members, of a type known in the art.
  • the operating flow of the groups 101 in this operating configuration of the machine 10, shown in fig. 11 provides that the sheet 19 of wrapping material is not fed in the first wrapper feeding station S3 because in this configuration the internal wrapper 201 is absent.
  • the group 101 of items formed at the exit of the channeling device 12 advances without being wrapped by any sheet until the third transfer station S7 and the second wrapper feeding station S8, where the sheet 39 of wrapping material is fed, which is intended to define the only wrapper wrapped around the items, corresponding to the external wrapper 202 mentioned above when describing the double layer configuration.
  • the sheet 39 is then folded, closed and welded following the steps previously described for the external wrapper 202, these subsequent steps being identical to those of the double wrapping packaging version, with the only difference that in this case only the single wrapper is directly in contact with the items 100, while in the first operating configuration the external wrapper 202 is wrapped on the internal wrapper 201, which in turn is wrapped around the items 100.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Abstract

L'invention concerne une machine (10) d'emballage d'articles discrets (100) comprenant une station d'alimentation (S1) pour alimenter les articles discrets (100) en groupes ordonnés (101), une première station d'alimentation (S3) pour alimenter une enveloppe interne (201), une station (S4) pour transporter et plier l'enveloppe interne (201) pour transporter les groupes ordonnés (101) et plier l'enveloppe interne (201) autour de ceux-ci, une station d'exploitation (S6), une seconde station d'alimentation (S8) pour alimenter une enveloppe externe (202), une station (S9) pour transporter et plier l'enveloppe externe (202) pour transporter les groupes (101) et plier l'enveloppe externe (202) autour de ceux-ci, une station (S11) pour fermer et souder l'enveloppe externe (202) et une station de sortie (S12).
PCT/IT2024/050115 2023-06-06 2024-05-31 Machine d'emballage d'articles discrets WO2024252436A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102023000011424 2023-06-06
IT102023000011424A IT202300011424A1 (it) 2023-06-06 2023-06-06 Macchina per il confezionamento di articoli discreti.

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1486469A (en) * 1973-11-21 1977-09-21 Gd Spa "diamond"style wrapping machine
CN88102751A (zh) * 1987-05-12 1988-11-30 萨帕尔自动折弯机有限公司 包装一个产品的工艺及实现该工艺的设备
EP0619231B1 (fr) * 1993-04-07 1998-06-17 SASIB TOBACCO S.p.A. Machine d'emballage, spécialement machine pour l'emballage de cigarettes ou similaires
WO2003082675A1 (fr) * 2002-04-03 2003-10-09 Sacmi Packaging S.P.A. Machine d'emballage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1486469A (en) * 1973-11-21 1977-09-21 Gd Spa "diamond"style wrapping machine
CN88102751A (zh) * 1987-05-12 1988-11-30 萨帕尔自动折弯机有限公司 包装一个产品的工艺及实现该工艺的设备
EP0619231B1 (fr) * 1993-04-07 1998-06-17 SASIB TOBACCO S.p.A. Machine d'emballage, spécialement machine pour l'emballage de cigarettes ou similaires
WO2003082675A1 (fr) * 2002-04-03 2003-10-09 Sacmi Packaging S.P.A. Machine d'emballage

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