EP4357261A1 - Système et procédé de manipulation d'un agencement de sac - Google Patents

Système et procédé de manipulation d'un agencement de sac Download PDF

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Publication number
EP4357261A1
EP4357261A1 EP23204696.1A EP23204696A EP4357261A1 EP 4357261 A1 EP4357261 A1 EP 4357261A1 EP 23204696 A EP23204696 A EP 23204696A EP 4357261 A1 EP4357261 A1 EP 4357261A1
Authority
EP
European Patent Office
Prior art keywords
outer bag
bag
cutting
arrangement
top fin
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP23204696.1A
Other languages
German (de)
English (en)
Inventor
Robert Mchugh
Simon Leadley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
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 Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Publication of EP4357261A1 publication Critical patent/EP4357261A1/fr
Pending legal-status Critical Current

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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
    • B65B69/00—Unpacking of articles or materials, not otherwise provided for
    • B65B69/0008—Opening and emptying bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/141—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter for thin material, e.g. for sheets, strips or the like
    • 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
    • B65B2220/00—Specific aspects of the packaging operation
    • B65B2220/16—Packaging contents into primary and secondary packaging
    • B65B2220/20—Packaging contents into primary and secondary packaging the primary packaging being bags, the secondary packaging being further bags, the primary bags being either finished or formed concurrently with the secondary bags

Definitions

  • the invention generally relates to equipment and methods for handling bags, such as bags used for transporting food products. More particularly, it is related to a system for handling a bag arrangement comprising an outer bag enclosing an inner bag, and a method for handling such bag arrangement.
  • milk productions are at very high levels.
  • milk productions are at very high levels.
  • By turning the milk into powder both weight and volume are reduced, which results in more efficient transportation.
  • the milk is less susceptible to be negatively affected by microorganisms, which has the positive effect that there is no need for refrigeration during transportation.
  • whey which is a bi-product from cheese production, into whey powder.
  • the whey powder is rich in protein and can be used as an ingredient in different food products.
  • the powder is often packed in bags for storage and/or for shipment to producers that use the powder as an ingredient.
  • the powder is not contaminated during transportation it is common to pack this in a plastic bag.
  • a plastic bag In order to protect the plastic bag during transportation, it can be enclosed by a bag made of kraft paper or other material suitable for protecting the plastic bag.
  • the product is typically released from the bag arrangement by first removing the outer bag. Usually this is made manually by a number of operators cutting or tearing the outer bag open such that the inner bag is exposed. In a subsequent station, the inner bag can be opened and the food product, e.g. milk powder, can be tipped into a mixer or other suitable equipment for producing recombined food products.
  • the food product e.g. milk powder
  • the bag arrangement often holds 25 kg of food product.
  • the manual work of opening the outer bag is generally hard work, and it is not unusual that the persons working with the task of removing the outer bag experience problems with shoulders and back.
  • the inner bag is damaged when the outer bag is manually removed, which may contaminate the product inside the inner bag.
  • An effect of reducing damages to the inner bag is that a risk for machine failures downstream this station can be reduced.
  • food safety risks can be reduced.
  • a system for handling a bag arrangement comprising an outer bag that encloses an inner bag.
  • the system comprises a cutting station that has a suction head and a cutting blade arrangement.
  • the suction head is arranged to lift the outer bag by applying a suction force on the outer bag, for forming a vertical distance between the outer bag and the inner bag.
  • the cutting blade arrangement is arranged inside the suction head, for cutting the outer bag open while lifted from the inner bag.
  • An advantage with having the cutting blade arrangement located inside the suction head is that cutting can be made while having the outer bag lifted from the inner bag, thereby reducing the risk of damaging the inner bag.
  • Using the suction head, that is, using sub-atmospheric pressure to lift the outer bag with respect to the inner bag, is advantageous in that the outer bag can be grabbed without risking that the inner bag is damaged.
  • the cutting blade arrangement may comprise m number of circular blades of different diameters, wherein the circular blades are grouped such that a circular blade of a smaller diameter is located inside a circular blade of a larger diameter, for cutting m number of layers when the outer bag is a multi-layer bag that comprises m number of layers.
  • Having a dedicated circular blade for each layer comes with the positive effect that that the cutting of the different layers can be made in a controlled manner, reducing a risk that all layers are not adequately cut through, or that cutting is done also through the inner bag.
  • Having the circular blades of smaller diameters placed inside those with larger diameters provides for that the sub-atmospheric pressure can be maintained during the course of cutting the different layers.
  • the m number of circular blades may be located at a respective different height, wherein the circular blades are arranged such that a circular blade of a smaller diameter is placed at a lower height than a circular blade of a larger diameter, for cutting the m number of layers sequentially starting with a lowermost circular blade cutting open an outermost layer of the m number of layers, such that diameters of openings cut in the m number of layers increase for each layer being cut.
  • the innermost circular blade also being the lowermost circular blade, i.e. the circular blade closest to the outer bag before the cutting has started, provides for that a cutting order from smaller openings to larger openings will provided in a convenient way.
  • the cutting blade arrangement designed in this way provides for that a risk of deviating from the cutting order can be reduced.
  • the cutting station may further comprise a suction pipe connected to the suction head, and a pump arranged to form a sub-atmospheric pressure inside the suction pipe and the suction head when in contact with the outer bag, for transporting away, via the suction pipe, outer bag pieces cut off from the outer bag by the cutting blade arrangement.
  • a suction pipe connected to the suction head
  • a pump arranged to form a sub-atmospheric pressure inside the suction pipe and the suction head when in contact with the outer bag, for transporting away, via the suction pipe, outer bag pieces cut off from the outer bag by the cutting blade arrangement.
  • the system may further comprise a top fin aligner arranged to, when the outer bag comprises a main body and a top fin, receive the top fin and to exert forces onto the top fin to thereby pull the top fin in a direction from the main body.
  • a top fin aligner By having the top fin aligner, it is possible to align the bag arrangement before cutting, thereby providing for that the opening made in the outer bag is made in a position of the outer bag in which it is possible to achieve the vertical distance such that the cutting can be made without damaging the inner bag. Such position may for instance be in a central position of the main body of the outer bag.
  • the top fin aligner may comprise a roller, driven by a roller motor, arranged to grip the top fin and to pull this towards the top fin aligner.
  • the cutting station may further comprise a top fin cutter attached to the top fin aligner and arranged to cut off at least a portion of the top fin from the main body of the outer bag.
  • the top fin cutter combined with the cutting blade arrangement provides for that the outer bag can be removed in a reliable manner.
  • the system may further comprise an outer bag removal station comprising a tearing arrangement that has a first and a second hook-shaped element arranged to be inserted into an opening in the outer bag that is provided by the cutting station, and to hook onto a first and a second edge section of the opening in the outer bag.
  • a motor arrangement is configured to move the first and second hook-shaped element in a direction away from each other, for tearing the outer bag open in a tearing direction from the first and second edge section to a first and second end point of the outer bag, respectively.
  • the tearing direction may extend along a longitudinal direction of the bag arrangement such that a longitudinal opening can be provided in the outer bag.
  • the first and second hook-shaped element each may comprise two sub-elements, wherein the sub-elements of the first hook element are arranged to be moved apart from each other in a transversal direction of the bag arrangement when the first hook-shaped element is in the first end point, and the sub-elements of the second hook-shaped element are arranged to be moved apart from each other in the transversal direction, when the second hook-shaped element is in the second end point, wherein the transversal direction is perpendicular to the longitudinal direction.
  • the outer bag removal station may further comprise a first and a second folding arm arranged to fold away a first and a second side of the outer bag, formed by the longitudinal opening, such that the inner bag is exposed.
  • the system may further comprise a bag lifting station for an inner bag, said lifting station (112) having a lifting arm provided with a suction head arrangement arranged to attach to the inner bag.
  • the outer bag may be made of paper, such as kraft paper, and the inner bag may be made of plastic.
  • An advantage with having the outer bag made of a non-oil based material is that the environmental footprint can be improved. As an effect, having the system described above, provides for that more environmentally friendly bag arrangements can be used. Further, since the outer bag removal is made in a more controlled manner when using the system compared to using manual labor, it is made possible to use a thinner plastic bag as the inner bag.
  • a method for handling a bag arrangement comprising an outer bag that encloses an inner bag, by using a system comprising a cutting blade arrangement and a cutting station that has a suction head, wherein the cutting blade arrangement is arranged inside the suction head.
  • the method comprises attaching the suction head to the outer bag, lifting the outer bag from the inner bag by applying a suction force on the outer bag by using the suction head such that a vertical distance between the two is formed, and cutting an opening in the outer bag by using the cutting blade arrangement while the outer bag is lifted from the inner bag.
  • the cutting blade arrangement may comprise m number of circular blades of different diameters, wherein the circular blades may be grouped such that a circular blade of a smaller diameter is located inside a circular blade of a larger diameter, for cutting m number of layers when the outer bag is a multi-layer bag that comprises m number of layers.
  • the step of cutting the opening in the outer bag by using the cutting blade arrangement may comprise m number of sub-steps in which each of the layers of the outer bag is cut individually by a dedicated circular blade of the m number of circular blades.
  • the method may further comprise exerting, when the outer bag comprises a main body and a top fin, forces onto the top fin to thereby pull the top fin in a direction from the main body.
  • the bag arrangement 102 comprises an outer bag 104, e.g. a bag made of kraft paper, enclosing an inner bag 106, e.g. a plastic bag.
  • an outer bag 104 e.g. a bag made of kraft paper
  • an inner bag 106 e.g. a plastic bag.
  • the outer bag 104 provides extra protection and reduces the risk of having the inner bag damaged during transportation.
  • outer bag 104 paper-based By having the outer bag 104 paper-based, less plastic material is needed for the bag arrangement 100 as a whole, which improves the environmental footprint compared to the alternative of having one thick plastic bag and no outer bag. Further, by having the system 100 for removing the outer bag instead of removing this manually, it is possible to provide more consistent bag opening which provides for using a relatively thinner inner bag and hence, in case the inner bad is made of plastic, an improved environmental footprint can be achieved.
  • the bag arrangement 102 is often taken care of in two steps.
  • the outer bag 104 is removed and in a second step the inner bag 106 is opened such that the food product can be released.
  • the outer bag 104 should be removed in a secure manner such that the inner bag 106 is not damaged. Further, the outer bag 104 should be removed in such a way that there is no or low risk for failure, e.g. low risk that the outer bag 104 is getting stuck such that an operator must manually remove the outer bag and restart the system 100.
  • the system 100 illustrated by way of example in Fig. 1 provides for that the bag arrangement can be opened in a controlled and reliable manner.
  • the system 100 can comprise a cutting station 108, in which the outer bag 104 is cut open. Once cut open, an outer bag removal station 110 can be used for removing the outer bag 104 such that the inner bag 106 is exposed. After having exposed the inner bag 106, an inner bag lifting station 112 can be used for lifting away the inner bag 106.
  • the bag arrangement 102 can be transported between the stations on a conveyor belt 114 in a feeding direction FD. Another option, even though not illustrated, is to have the stations moved while the bag arrangement 102 is stationary. For instance, this could be achieved by having the stations mounted on robotic arms.
  • Fig. 2 illustrates the system 100 from a side view in further detail.
  • the cutting station 108 can comprise a suction head 200 placed on a suction pipe 202.
  • the suction head 200 can be arranged to attach to the outer bag 104 such that this is lifted from the inner bag 106.
  • the outer bag 104 can comprise a top fin 204 and a main body 205.
  • a top fin aligner 208 connected to a frame 206 of the cutting station 108 can be used.
  • the top fin aligner 208 comprises a U-shaped element 210.
  • the bag arrangement 102 is forwarded to the outer bag removal station 110.
  • a first and a second hook-shaped element 212a, 212b can be inserted into an opening of the outer bag 104, made in the cutting station 108, and placed such that these grab opposite edges of the opening in the outer bag 104.
  • the first and second hook-shaped element 212a, 212b can be moved apart such that a longitudinal opening is made in the outer bag 104.
  • the sub-elements of the first and second hook-shaped elements 212a, 212b can be moved transversally such that two transversal slits are provided, a top transversal slit next to the top fin 208 and a bottom transversal slit next to a bottom of the outer bag 104. This procedure is illustrated in further detail in fig 5A and 5B , and described in further detail below.
  • a first and a second folding arm 214a, 214b can be used for folding away the outer bag 104.
  • the first and second folding arm 214a, 214b can be U-bent rods attached to the frame 206 and arranged to be moved rotationally around axes of rotation parallel with the feeding direction FD such that flaps, formed by the longitudinal opening and the two transversal slits, are folded away on either side of the conveyor belt 114. This procedure is further illustrated in Fig. 6A and 6B , and also described more in detail below.
  • a lifting arm 216 provided with a suction head arrangement 218 can be used for lifting the inner bag 106 from the conveyor belt 114.
  • the suction head arrangement 218 can comprise a plurality of suction heads such that a plurality of attachment points are provided.
  • Fig. 3 is a view of the cutting station 108.
  • a cutting blade arrangement 300 can be placed radially inside the suction pipe 202 and the suction head 200.
  • An advantage with having the cutting blade arrangement 300 placed inside the suction head 200 in this way is that when pumping out air from the suction pipe 202 and the suction head 200 by using a pump 302, the outer bag 104 can be lifted from the inner bag 106, herein illustrated by a vertical distance V-D, onto the cutting arrangement 300. In this way, the outer bag 106 can be cut without risk, or at least with low risk, of damaging the inner bag 106.
  • the cutting blade arrangement 300 can comprise a number of circular blades 306a-c of different diameter.
  • the blades 306a-c can be grouped such that circular blades of smaller diameter 306a are placed inside circular blades of larger diameter 306c. Having several circular blades is beneficial if the outer bag 104 is a multi-layer bag comprising a number of layers 304a-c. By having the number of blades 306 a-c corresponding to the number of layers 304a-c, there may be one dedicated blade for each layer.
  • the circular blades 306a-c are driven by a motor (not shown) that rotates the blades around a vertical axis.
  • the part of the circular blades 306a-c which contact the outer bag 104 are preferably sharp.
  • the circular blades 306a-c can be placed at different heights. More particularly, the blades can be arranged such that circular blades of smaller diameter 306a are placed at a lower height than circular blades of larger diameter 306c.
  • An advantage of this is that the number of layers 304a-c can be cut sequentially starting with a lowermost circular blade cutting open an outermost layer 304a. Diameters of openings cut in the number of layers can increase for each layer being cut.
  • An advantage with having small holes cut first is that this allows the suction head 200 to maintain the outer bag 104 lifted from the inner bag 106.
  • outer bag pieces cut off from the outer bag 104 by the cutting blade arrangement 300 can be transported away from the outer bag 104 via the suction pipe 202.
  • Fig. 4 is a perspective view of the cutting station 108.
  • the U-shaped element 210 may act as a top fin cutter 400 that cuts off the top fin 204 along its length.
  • the element 210 may have a knife having its edge directed towards the fin 204, in the transversal direction TRA-D of the bag arrangement 102.
  • the element 210 is movable in the transversal direction TRA-D by a linear motor the is arranged on the frame 206 that carries the element 210
  • motor driven rollers 402 provided inside the U-shaped element 210 can be used to pull in the top fin 204 towards the U-shaped element 210.
  • the rollers 402 may be driven by any suitable motor 404 and are arranged opposite each other, such that the top fin can be received in between the rollers. The rollers then rotate in opposite directions to accomplish the pulling.
  • the top cutter has a first arm that pulls the fin and keeps it in position, while a second arm pulls the fins and cuts it in the transversal direction TRA-D by moving in that direction, along the frame to which the arms are connected.
  • the first arm needs only pulling rollers while the second arm advantageously has both pulling rollers and a knife.
  • Fig.5A illustrates the outer bag removal station 110 in further detail, more particularly it is illustrated a tearing arrangement 500 comprising the first and second hook-shaped elements 212a, 212b.
  • the first and second hooks-shaped elements 212a, 212b may in turn comprise a first and a second hook component 502a, 502b, respectively. These two hook components can be arranged to grab a first and a second edge section of 504a, 504b of an opening 506 formed by the cutting blade arrangement 300 in the cutting station 300.
  • the first and second hook component 502a, 502b may be pivotally arranged and connected to linear motors such that the hook components can be inserted into the opening 506 and then pivoted such that the edge sections 504a, 504b are adequately grabbed.
  • the first and second hook-shaped elements 212a, 212b can be moved apart such that the longitudinal opening of the outer bag 104 can be formed, i.e. the elements 212a, 212b are moved away from each other in a longitudinal direction LON-D.
  • the first and second hook component 502a, 502b may be have sharpened sections facing the outer bag 104 when the first and second hook-shaped elements 212a, 212b are moved apart. As illustrated in Fig.
  • a motor arrangement 510 herein exemplified by two motors, can be arranged to provide for that the first and second hook-shaped elements 212a, 212b are moved from a central position with both hook components 502a, 502b placed in the opening 506, as illustrated in Fig. 5A , to a peripheral position with the first hook-shaped element 212a placed in a first end point 508a and the second hook-shaped element 212b placed in a second end point 508b.
  • the first and second hook-shaped element 212a, 212b can be moved away from each other in the transversal direction TRA-D, to a respective outer part of the frame.
  • the first hook-shaped element 212a comprises two sub-elements 600a-b and that the second hook-shaped element 212b comprises two sub-elements, wherein each pair of sub-elements are arranged to be moved apart transversally, i.e. in a transversal direction TRA-D.
  • the outer bag 104 can be moved away such that the inner bag 106 is exposed.
  • the outer bag 104a can be torn apart, or cut in case the sub-elements 600a-d have sharpened edges.
  • each of the first and second hook component may comprise a respective set of hook-shaped elements, i.e. the outer bag removal station has in total four hook-shaped elements.
  • Each of these hook-shaped elements are arranged on a respective arm that is attached to a frame of the outer bag removal station.
  • the arms are operated by linear motors. The arms first move in pairs the longitudinal direction away from the opening that was cut by the cutting station, with arms of one pair moving in the same direction, opposite the direction by which the other pair or arms is moved. A long cut is then formed. Next the arms in each pairs of arms are separated by moving outwardly in the transversal direction TRA-D, thereby ripping open the outer bag. Thereafter the hook-shaped elements release the outer bag.
  • the first and second folding arms 214a, 214b can be used for folding away a first and a second side 602a, 602b of the outer bag 104. In this way, a risk that the outer bag 104 hinders lifting of the inner bag 106 by the bag lifting station 112 can be further reduced.
  • Fig. 7 is a flowchart illustrating a method 700 for handling the bag arrangement 112.
  • the suction head 200 can be attached to the outer bag 104.
  • the outer bag 104 can be lifted from the inner bag 106 by applying a suction force such that the vertical distance V-D is formed.
  • the opening 506 in the outer bag 104 can be provided by cutting with the cutting blade arrangement 300 while the outer bag 104 is lifted from the inner bag 106.
  • the third step 706 may, if the outer bag 104 is a multi-layer bag, comprise multiple sub-steps in which each of the layers of the outer bag 104 is cut individually by a dedicated circular blade of the cutting arrangement 300.
  • a fourth step 708 forces are exerted, when the outer bag 104 comprises a main body 205 and a top fin 204, onto the top fin 204 to thereby pull the top fin 204 in a direction from the main body 205. This makes it more easy to cut off the top fin, as previously described.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
EP23204696.1A 2022-10-21 2023-10-19 Système et procédé de manipulation d'un agencement de sac Pending EP4357261A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22202890 2022-10-21

Publications (1)

Publication Number Publication Date
EP4357261A1 true EP4357261A1 (fr) 2024-04-24

Family

ID=83903223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23204696.1A Pending EP4357261A1 (fr) 2022-10-21 2023-10-19 Système et procédé de manipulation d'un agencement de sac

Country Status (2)

Country Link
EP (1) EP4357261A1 (fr)
WO (1) WO2024084008A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236517A (en) * 1989-08-31 1991-04-10 Fahr Bucher Gmbh Process for automatically feeding machines with packaged materials
DE102011084302A1 (de) * 2011-10-11 2013-04-11 Robert Bosch Gmbh Vorrichtung und Verfahren zum Entnehmen eines sterilen Gegenstands aus einem Folienbeutel
DE102014201966A1 (de) * 2014-02-04 2015-08-06 Robert Bosch Gmbh Vorrichtung und Verfahren zum Handling eines Trays
US10906684B2 (en) * 2015-03-18 2021-02-02 Technopak Limited Packaging
US20220306332A1 (en) * 2021-03-24 2022-09-29 Dematic Gmbh Device and method for automatically removing a film wrapping from palletized stacks of products

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236517A (en) * 1989-08-31 1991-04-10 Fahr Bucher Gmbh Process for automatically feeding machines with packaged materials
DE102011084302A1 (de) * 2011-10-11 2013-04-11 Robert Bosch Gmbh Vorrichtung und Verfahren zum Entnehmen eines sterilen Gegenstands aus einem Folienbeutel
DE102014201966A1 (de) * 2014-02-04 2015-08-06 Robert Bosch Gmbh Vorrichtung und Verfahren zum Handling eines Trays
US10906684B2 (en) * 2015-03-18 2021-02-02 Technopak Limited Packaging
US20220306332A1 (en) * 2021-03-24 2022-09-29 Dematic Gmbh Device and method for automatically removing a film wrapping from palletized stacks of products

Also Published As

Publication number Publication date
WO2024084008A1 (fr) 2024-04-25

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