A method for filling a bag with a powdered product, a bag-filling station for filling bags with a powdered product, and a bagging installation comprising at least one such station.

Abstract

Method for filling a bag with a powdered product, bag filling station for bags with a powdered product, and bagging installation comprising at least one such station. The invention relates to a method for filling a bag (12) with a powdered product, which comprises: a step of filling a buffer container (26), a step of deaerating the powdered product contained in the buffer container (26) by drawing the air present in the powdered product with at least one suction element (40) so as to obtain a powdered product in a compact and deaerated state, a step of transferring the powdered product in a compact and deaerated state from the buffer container (26) into the bag (12) by moving the suction element (40). Thus, according to the invention, the powdered product is deaerated before being introduced into the bag.The invention also relates to a bag filling station for implementing said process and a bagging installation comprising at least one such filling station. Figure 1.

Description

Title of the invention: Method for filling a bag with a powdered product, bag filling station for bags with a powdered product, and bagging installation comprising at least one such station

[0001] The present application relates to a method of filling a bag with a powdered product, to a station for filling bags with a powdered product and to a bagging installation comprising such a bagging station.

[0002] According to one embodiment, a bagging installation includes a bag feeding station configured to present empty bags one after the other, each with an opening facing upwards, a filling station configured to fill the bags one after the other, and a closing station for closing the bags.

[0003] According to one configuration, a filling station comprises: a. Clamps configured to grasp the sides of each bag, near its upper end, in order to hold it immobile in a vertical position, with its upper end open, b. a vertically movable filling mouth, configured to penetrate the bag and fill it with powdered product.

[0004] Alternatively, the filling mouth is stationary and the open bag translates vertically to house the lower end of the filling mouth in the bag.

[0005] Due to its fall into the bag, the powdered product contained within the bag is aerated and occupies a significant volume for a given mass. Consequently, the powdered product must be deaerated to increase its density and reduce its volume. To this end, the bagging installation includes, between the filling and sealing stations, at least one deaeration station where the powdered product is deaerated. Such a station includes a suction element, called a deaeration wand, which is partially porous, connected to a vacuum pump, and configured to be immersed in the powdered product. When immersed in the powdered product, the deaeration wand removes the air present in the powdered product. Alternatively, the compaction of the powdered product is achieved through external vibration.

[0006] This embodiment is not satisfactory for the following reasons.

[0007] Adding a deaeration station leads to an increase in the length and therefore the size of the bagging installation.

[0008] According to another drawback, the filling and deaeration of the powdered product contained in the bag generates a lot of dust which tends to settle on the surfaces outside of the bag and to get it dirty.

[0009] Finally, each bag must be large enough to contain the aerated powdered product. After the deaeration step, the powdered product occupies a significantly smaller volume, resulting in a bag with extra length necessary for filling but unnecessary after deaeration. This extra length leads to a high cost per bag relative to its final volume.

[0010] The present invention aims to remedy all or part of the drawbacks of the prior art.

[0011] To this end, the invention relates to a method for filling a bag with a powdered product, said bag being temporarily immobilized in a filling station of a bagging installation and configured to contain a given mass of the powdered product. When it contains the given mass, said powdered product occupies a first volume in an aerated state and a second volume smaller than the first volume in a compact and deaerated state.

[0012] According to the invention, the filling process comprises: a. a step of filling a separate buffer container from the bag, b. a step of deaerating the powdered product contained in the container buffer by aspirating the air present in the powdered product with at least one aspirating element, at least partially immersed in the powdered product and in the activated state, so as to obtain a powdered product in a compact and deaerated state, c. a step of transferring the powdered product in a compact and deaerated state from the buffer container into the bag by moving the suction element, which is kept activated and at least partially immersed in the powdered product, d. the powdered product in a compact and deaerated state being positioned in the bag, a step of releasing the powdered product by deactivating the suction element, e. a step of exiting the suction element from the bag.

[0013] According to this process, the powdered product is compacted and deaerated before being introduced into the bag. Consequently, the bag does not need to have an extra length, like prior art bags, which had to be able to contain the powdered product in an aerated state.

[0014] At a filling station in a bagging installation, it is possible to carry out the steps of deaerating the powdered product and introducing the powdered product into the bag. Consequently, the station dedicated to deaerating the powdered product in the bags can be eliminated, thus reducing the length and size of the bagging installation.

[0015] Finally, since the deaeration step is not carried out in the bags, there is a risk of soiling the Bags containing dust generated during deaeration are limited.

[0016] The invention also relates to a bag filling station enabling the implementation of said filling process as well as a bagging installation comprising at least one such filling station.

[0017] Other features and advantages will become apparent from the following description of the invention, given by way of example only, with reference to the accompanying drawings, among which:

[0018] [Fig. 1] is a schematic representation of a filling station at different times in a filling process illustrating one embodiment of the invention,

[0019] [Fig. 2] is a schematic representation of a buffer container in the closed state and at the open state illustrating one embodiment of the invention,

[0020] [Fig.3] is a horizontal section of a buffer container illustrating a mode of realization publication of the invention,

[0021] [Fig.4] is a horizontal section of a buffer container illustrating another mode of realization of the invention,

[0022] [Fig.5] is a schematic top view of a bagging installation illustrating a method of embodiment of the invention,

[0023] [Fig.6] is a schematic front view of a filling station illustrating a mode of the realization of the invention.

[0024] According to one application, a bagging installation 10 is configured to fill bags 12 with powdered product.

[0025] According to an embodiment shown in [Fig. 5], each bag 12 comprises two side faces 12.1, 12.2, each having first and second side edges as well as lower and upper edges. The first side edges of the two side faces 12.1, 12.2 are connected to each other directly or via a gusset 12.3. The same applies to the second side edges, which are connected directly or via a gusset 12.3. The lower edges of the two side faces 12.1, 12.2 are connected to each other before filling to form the bottom of the bag. The two upper edges of the two side faces 12.1, 12.2 are not connected before filling and define an opening 12.4 through which the powdered product is introduced. After filling, the upper edges are joined together, by any appropriate means (gluing, sewing or other), to close the bag.

[0026] The mouth 12.4 has a passage section. According to one configuration, when open, the bag 12 has a constant cross-section (perpendicular to the first and second lateral edges) over its entire height (distance between the lower and upper edges) and substantially equal to the passage section of the mouth 12.4.

[0027] Each bag is sized to contain a given mass of product deaerated and compacted verulent. In the deaerated and compacted state, the powdered product occupies a compact volume less than the aerated volume occupied by the same mass of powdered product in the aerated state, i.e. not yet deaerated.

[0028] According to an embodiment visible in [Fig.5], a bagging installation 10 comprises, in the order of bag flow materialized by the arrow DD, at least one bag feeding station 14, at least one filling station 16, at least one closing station 18 as well as at least one bag movement mechanism 20 configured to move the bags, one after the other, into the different stations 14, 16, 18.

[0029] The feeding and closing stations 14, 18 and the bag movement mechanism 20 are not further described as they may be identical to those of the prior art.

[0030] A filling station 16 includes at least one holding mechanism 22 configured to temporarily hold each bag 12 stationary at the filling station 16, with its opening 12.4 facing upwards. By way of example, the holding mechanism 22 may include clamps configured to grasp the first and second lateral edges of the bags, near the upper edges. Alternatively, the holding mechanism 22 may include suction cups for separating the two lateral faces 12.1, 12.2. Of course, the invention is not limited to these embodiments for the holding mechanism 22. In operation, the holding mechanism 22 is configured to hold the bag 12 so that its opening 12.4 has a maximum opening cross-section.

[0031] According to an embodiment shown in [Fig. 1], a filling station 16 comprises a powder product feeding system 24 configured to distribute a powder product by gravity. This powder product feeding system 24 includes a feed opening 24.1 through which the powder product to be packaged flows by gravity. According to one embodiment, the powder product feeding system 24 comprises a hopper 24.2 containing the powder product, positioned above the feed mouth 24.1 and communicating with the latter, and a flow control system 24.3 of the powder product between the hopper 24.2 and the feed mouth 24.1 configured to occupy a passing state in which the flow control system 24.3 allows the flow of the powder product towards the feed mouth 24.1 and a closed state in which it prevents any flow towards the feed mouth 24.1. Of course, the invention is not limited to these embodiments for the powder product feed system 24.

[0032] According to a particular feature of the invention, the filling station 16 comprises a buffer container 26. The latter has a top opening 26.1 through which The powdered product is poured by gravity.

[0033] This buffer container 26 is dimensioned to contain the aerated volume occupied by the powdered product of given mass.

[0034] This buffer container 26 has a horizontal cross-section very slightly smaller than the opening 12.4 of the bag 12 held in place at the filling station 16. As illustrated in Figures 3 and 4, this horizontal cross-section can be oblong with rounded ends as shown in [Fig. 3] or substantially rectangular as shown in [Fig. 4]. Regardless of the embodiment, the horizontal cross-section must lie within the opening 12.4 of the bag 12.

[0035] According to one embodiment, the buffer container 26 has a bottom 28 and at least one side wall 30 which has a lower edge connected to the bottom 28 and an upper edge which delimits the upper opening 26.1.

[0036] For the remainder of the description, a wall or wall means one or more walls connected in such a way as to form a tube.

[0037] The buffer container 26 includes an outlet opening 32 configured to allow the powdered product to exit in a compact and deaerated state from the buffer container 26.

[0038] According to one configuration, the upper opening 26.1 and the outlet opening 32 are combined. In this case, the powdered product is poured into the buffer container 26 via the upper opening 26.1 and then extracted from the buffer container 26 in a compact and deaerated state also via the upper opening 26.1.

[0039] According to another preferred configuration, visible in Figures 1, 2 and 6, the upper opening 26.1 and the outlet opening 32 are separate, the outlet opening 32 being located at the bottom 28 and delimited by the lower edge of the side wall 30. In this case, the powdered product is poured into the buffer container 26 via the upper opening 26.1 and then discharged from the buffer container 26 in a compact and deaerated state via the outlet opening 32 towards an area located below the buffer container 26. According to this configuration, the holding mechanism 22 and the buffer container 26 are configured so that the bag 12 is immobilized directly above the buffer container 26 in order to allow the transfer of the powdered product in a compact and deaerated state from the buffer container 26 to the bag along a straight and vertical path.

[0040] This configuration allows for a simple and short trajectory between the buffer container 26 and the bag 12, which limits the risks of disintegration of the powdered product in a compact and deaerated state during its transfer.

[0041] According to one embodiment, the buffer container 26 comprises at least one movable hatch 34 between a closed state in which it forms the bottom 28 and closes the opening of output 32 as well as an open state in which it completely clears the opening of output 32.

[0042] According to one arrangement, the buffer container 26 comprises two movable hatches 34, 34' configured to occupy a contiguous position, visible on part (A) of [Fig.2], corresponding to the closed state and a spread-apart position, visible on part (B) of [Fig.2], corresponding to the open state, in which the two hatches 34, 34' clear the outlet opening 32.

[0043] Of course, the invention is not limited to this number of traps 34, 34'.

[0044] According to one configuration, each hatch 34, 34' is animated by a movement of pi voting between closed and open states, as illustrated in [Fig.1].

[0045] According to another configuration, each hatch 34, 34' is animated by a translational movement between the closed and open states, as illustrated in figures 2 and 6.

[0046] Of course, the invention is not limited to these kinematics for the hatch(es) 34, 34'.

[0047] According to one embodiment, the side wall 30 of the buffer container 26 is slightly flared towards the outlet opening 32, as illustrated in [Fig. 2]. This embodiment limits friction between the buffer container 26 and the powdered product in its compact and deaerated state as it exits through the outlet opening 32. When the outlet opening 32 is located at the bottom 28, the side wall 30 flares downwards.

[0048] Alternatively, as illustrated in [Fig.1], the buffer container 26 could comprise a substantially constant horizontal cross-section over its entire height.

[0049] According to a configuration visible in [Fig.2], the bottom 28 is substantially flat. According to another configuration visible in [Fig.1], the bottom 28 comprises two inclined sides, which correspond to the two hatches 34, 34', substantially symmetrical with respect to a median plane PM, the buffer container having a greater height (distance between the bottom 28 and the upper opening 26.1) at the level of the median plane PM than at the level of the side wall 30.

[0050] According to an embodiment visible in [Fig.1], the filling station 16 includes at least one weight measurement system 36 allowing the mass of the buffer container 26 to be measured, in particular when the latter contains the powdered product.

[0051] According to a particular feature of the invention, the filling station 16 includes a vacuum deaeration system 38 configured to extract the air present in the powdered product contained in the buffer container 26. Thus, unlike the prior art, the powdered product is not deaerated in the bag 12 but prior to its introduction into the bag 12 when it is contained in the buffer container 26.

[0052] The vacuum deaeration system 38 comprises at least one suction element 40 configured to be partially immersed in the powdered product. The vacuum deaeration system 38 is configured to occupy an activated state in which it generates suction at the suction element 40 and a deactivated state in which it no longer generates suction at the suction element 40.

[0053] According to one embodiment, the suction element 40 comprises at least one hollow body 42 having a porous wall S42 separating an inner zone and an outer zone. The porous wall S42 has a porosity adapted, in particular, to the powdered product, so that in the activated state, when the porous wall S42 is immersed in the powdered product, the powdered product remains in the outer zone and the air present in the powdered product passes from the outer zone to the inner zone, thereby deaerating and compacting the powdered product. In addition, the vacuum deaeration system 38 comprises at least one vacuum pump 44 (or any other element capable of drawing in air) which communicates with the inner zone of the hollow body 42.

[0054] According to one configuration, the hollow body 42 is a cylindrical tube which includes a first end 42.1 that is sealed and a second end 42.2 connected by a hose to the vacuum pump 44. According to one arrangement, the porous wall S42 extends, from the first end 42.1, over a given height H42 and does not extend to the second end 42.2. In operation, when the vacuum deaeration system 38 is in the activated state, the entire porous wall S42 is immersed in the powdered product.

[0055] According to one mode of operation, the vacuum deaeration system 38 generates a depression in the inner area of ​​the hollow body 42 of between 0.1 and 0.4 bar.

[0056] Of course, the invention is not limited to this embodiment for the hollow body 42. The shapes of the hollow bodies 42 and their number are determined according to the nature of the powdered product and the geometry of the buffer container 26.

[0057] By way of example, the hollow body 42 is a deaeration tube identical to those of the prior art. For a buffer container 26 which has the following dimensions; namely a height of between 250 and 500 mm, a width of approximately 100 mm, a length of approximately 200 mm, for a capacity of between 5 and 10 liters, and containing a powdered product such as plaster, cement, glue, milk powder or others with a particle size of 10 to 150 µm, the vacuum deaeration system 38 generates a vacuum of approximately 0.2 bar and comprises a single deaeration tube which has the following characteristics, namely a diameter of 40 to 50 mm, a height of approximately 60 to 120 mm and a porosity of between 15 and 120 µm.

[0058] According to one particular feature of the invention, the filling station 16 comprises at least one displacement system 46 configured to move the suction element 40 between the buffer container 26 and bag 12 immobilized at the filling station 16. The movement system 46 is designed according to the trajectory followed by the suction element 40 between the buffer container 26 and the bag 12 immobilized at the filling station 16.

[0059] According to one embodiment, the movement system 46 could be a robotic arm. When the buffer container 26 is positioned directly above the bag 12, which is immobilized at the filling station 16, the trajectory is simplified. In this case, the trajectory is straight and vertical. The movement system 46 includes at least one linear actuator, such as a cylinder, configured to move the suction element 40 vertically.

[0060] According to one embodiment, the suction element 40 comprises at least one vibration emitter 48 integral with the hollow body 42 and configured to vibrate it. In one configuration, the vibration emitter 48 is ultrasonic and emits waves between 20 kHz and several megahertz.

[0061] According to one mode of operation, each vibration emitter 48 is configured to occupy a deactivated state in which it does not emit vibrations and an activated state in which it emits vibrations.

[0062] This vibration emitter 48 is used to promote the separation of the suction element 40 and the powdered product in a compact and deaerated state and / or to facilitate the unclogging of the porous wall S42.

[0063] According to one embodiment, the filling station 16 may include at least one screen positioned between the buffer container 26 and the bag 12 immobilized at the level of the filling station 16, said screen being configured to limit the propagation towards the bag 12 of the dust potentially emitted at the level of the buffer container 26 (during the deaeration of the powdered product).

[0064] According to an embodiment visible in [Fig.6], the filling station 16 comprises at least one unclogging enclosure 50 dimensioned to contain the suction element 40 and equipped with at least one movable gate 50.1 between a closed position (in bold line on [Fig.6]) in which the gate 50.1 closes the unclogging enclosure 50 and an open position (in dotted line on [Fig.6]) in which it allows a suction element 40 to enter or exit the unclogging enclosure 50.

[0065] In the presence of a cleaning enclosure 50, the displacement system 46 is configured to move the suction element 40 between the cleaning enclosure 50, the buffer container 26 and the bag 12 immobilized at the filling station 16.

[0066] According to one arrangement, the unclogging chamber 50 is positioned above the buffer container 26, directly above it. This arrangement simplifies the trajectory of the suction element 40, which is straight and vertical.

[0067] In addition to the unclogging chamber 50, the filling station 16 includes a blowing system configured to blow air into the hollow body 42 in order to unclog it.

[0068] According to one embodiment, the blowing system and the vacuum pump 44 are a single reversible device configured to generate: a. a depression in the hollow body 42 during a deaeration step of the powdered product or a displacement step of the powdered product in a compact and deaerated state, or b. an overpressure in the hollow body 42 during a cleaning step.

[0069] According to an arrangement visible in [Fig. 5], the filling station 16 comprises a first zone 52.1 which includes the powder feed system 24 and a second zone 52.2, in which a bag 12 is immobilized, which includes the suction element 40 and the optional cleaning chamber 50, the first and second zones being offset in a horizontal plane. According to this arrangement, at least one buffer container 26 moves between the first and second zones 52.1, 52.2 so as to come to rest in a first position, in the first zone 52.1, in which the buffer container 26 is positioned below the powder feed system 24, directly above it, and in a second position, in the second zone 52.2, in which the buffer container 26 is positioned above the bag 12 immobilized in the filling station 16, directly above the latter, at the point of the trajectory of the suction element 40 and below the possible unclogging enclosure 50. .

[0070] According to this arrangement, the filling station 16 includes at least one displacement system 54 configured to move each buffer container 26 between the first and second zones 52.1, 52.2, more particularly between the first and second positions.

[0071] According to one embodiment, the filling station 16 comprises several buffer containers 26, 26' such that first and second buffer containers 26, 26' are simultaneously immobilized respectively in the first and second zones 52.1, 52.2. In this case, the movement system 54 can be a carousel.

[0072] According to this embodiment, the first buffer container 26 immobilized in the first zone 52.1 is filled with powdered product and possibly weighed, while for the second buffer container 26' immobilized in the second zone 52.2, the powdered product is deaerated and then transferred in the compact and deaerated state from the buffer container 26 to the bag 12.

[0073] Of course, the invention is not limited to this arrangement. Thus, the filling station could contain only one zone and a single buffer container 26.

[0074] The filling station 16 described above allows for the implementation of a process for filling a bag 12 temporarily immobilized in the filling station 16 with a powdered product, the bag 12 being configured to contain a given mass of the powdered product; when it has the given mass, the powdered product occupies a first volume in an aerated state and a second volume significantly smaller than the first volume in a compact and deaerated state.

[0075] According to an embodiment shown in Figures 1, 5 and 6, the method for filling a bag comprises: a. a step of filling a buffer container 26 with the powdered product, said buffer container 26 being configured to contain a first volume of powdered product in an aerated state, as illustrated in part (A) of [Fig. 1], b. a deaeration step of the powdered product in the buffer container 26 by aspirating the air present in the powdered product with at least one aspirating element 40 at least partially immersed in the powdered product and in the activated state, as illustrated in part (B) of [Fig. 1], so as to obtain a powdered product in a compact and deaerated state, c. a step of transferring the powdered product in a compact and deaerated state from the buffer container 26 into the bag 12 by moving the suction element 40 kept activated and at least partially immersed in the powdered product, as illustrated in part (C) of [Fig.1], d. a step of releasing the powdered product in a compact and deaerated state into the bag 12 by deactivating the suction element 40, as illustrated in part (D) of [Fig.1], e. an exit step of the suction element 40 from the bag 12.

[0076] During the transfer step, the powdered product, in its compact and deaerated state, is in the form of a compact block that remains pressed against the suction element 40 by the suction effect produced by the suction element 40 when it is activated. Since the block of powdered product is held against the suction element 40 by the suction effect, it can be moved by moving the suction element 40.

[0077] Filling the powdered product into a buffer container 26 separate from the bag 12 and de-aerating it in the latter avoids soiling the bags during the filling and de-aerating step.

[0078] According to another advantage, since the deaeration step is carried out in the filling station, the bagging installation does not include a station dedicated to deaeration, which makes it possible to reduce its length and size.

[0079] According to another advantage, since the powdered product is never in an aerated state in bag 12 but only in a compact and deaerated state, it is possible to reduce the height of the bags, which helps to reduce the production costs of the bags.

[0080] Prior to the deaeration step, the filling process may include a step of unclogging the suction element 40, as illustrated in part (E) of [Fig. 1]. This unclogging step can be carried out once the suction element 40 has been deactivated and has released the bag 12. During the unclogging step, the vibration emitter 48 is activated to emit vibrations in order to optimize the unclogging.

[0081] To promote the separation of the suction element 40 and the powdered product in a compact and deaerated state, in addition to stopping the depression, the release step includes a vibration emission phase 56, as illustrated in part (D) of [Fig.1], when the powdered product in a compact and deaerated state is positioned in the bag 12. Alternatively, the suction element 40 can generate a slight overpressure.

[0082] According to an operating mode visible in [Fig. 5], the filling step is carried out in a first zone 52.1 and the deaeration and transfer steps are carried out in a second zone 52.2. In this case, the filling process may include a step of moving the buffer container 26 from the first zone 52.1 to the second zone 52.2. Thus, it is possible to carry out the filling step of a first buffer container 26 simultaneously with a deaeration step of the powdered product in a second buffer container 26', which helps to increase the bagging rate.

Claims

Demands

1. A method for filling a bag (12) with a powdered product, said bag (12) being temporarily immobilized in a filling station (16) of a bagging installation (10) and configured to contain a given mass of the powdered product, when it presents the given mass of said powdered product occupying a first volume in an aerated state and a second volume smaller than the first volume in a compact and deaerated state; characterized in that the filling method comprises: a. a step of filling a buffer container (26) separate from the bag (12), b. a step of deaerating the powdered product contained in the buffer container (26) by aspirating the air present in the powdered product with at least one aspirating element (40), at least partially immersed in the powdered product and in the activated state, so as to obtain a powdered product in a compact and deaerated state, c.a step of transferring the powdered product in a compact and deaerated state from the buffer container (26) into the bag (12) by moving the suction element (40) which is kept activated and at least partially immersed in the powdered product, d. the powdered product in a compact and deaerated state being positioned in the bag (12), a step of releasing the powdered product by deactivating the suction element (40), e. a step of exiting the suction element (40) from the bag (12).

2. Method of filling a bag (12) according to the preceding claim, characterized in that the step of filling the buffer container (26) consists of pouring by gravity a first volume of powdered product into the buffer container (26).

3. A method for filling a bag (12) according to any one of the preceding claims, characterized in that the release step includes a vibration emission phase (56) to promote the separation of the suction element (40) and the powdered product in a compact and deaerated state.

4. Method for filling a bag (12) according to any one of the claims previous, characterized in that, prior to the deaeration step, the filling process includes a step of unclogging the suction element (40).

5. A method for filling a bag (12) according to any one of the preceding claims, characterized in that the filling step is carried out in a first zone (52.1) and the deaeration and transfer steps are carried out in a second zone (52.2) and in that the filling method includes a step of moving the buffer container (26) from the first zone (52.1) to the second zone (52.2).

6. Bag filling station enabling the implementation of the filling process according to any one of the preceding claims, said filling station comprising at least one holding mechanism (22) configured to temporarily hold each bag (12) stationary and a powder product supply system (24); characterized in that the filling station comprises: a. a buffer container (26) separate from the bag (12) and configured to contain a first volume of powder product in an aerated state, b.a vacuum deaeration system (38) comprising at least one suction element (40) configured to be partially immersed in the powdered product contained in the buffer container (26), said vacuum deaeration system (38) being configured to occupy an activated state in which it generates suction at the suction element (40) and a deactivated state in which it no longer generates suction at the suction element (40), c. at least one displacement system (46) configured to move the suction element (40) between the buffer container (26) and the bag (12).

7. Bag filling station according to the preceding claim, characterized in that, in at least one position, the buffer container (26) is positioned above the bag (12) and directly above it.

8. Bag filling station according to the preceding claim, characterized in that the displacement system (46) comprises at least one linear actuator configured to move the suction element (40) vertically.

9. Bag filling station according to any one of claims 6 to 8, characterized in that the suction element (40) comprises at least one vibration emitter (48) integral with the hollow body (42) and configured to vibrate it.

10. Bag filling station according to any one of claims 6 to 9, characterized in that it comprises a first zone (52.1) which includes the powder product feeding system (24), a second zone (52.2) offset in a horizontal plane relative to the first zone (52.1) and at which each bag (12) is immobilized, and at least one movement system (54) configured to move each buffer container (26) between the first and second zones (52.1, 52.2).

11. Bag filling station according to the preceding claim, characterized in that it comprises several buffer containers (26, 26') such that first and second buffer containers (26, 26') are simultaneously immobilized respectively in the first and second zones (52.1, 52.2).

12. Bag filling station according to any one of claims 6 to 11, characterized in that it comprises at least one unclogging enclosure (50) configured to contain the suction element (40) and allow it to enter or exit.

13. Bag filling station according to any one of claims 6 to 12, characterized in that it comprises at least one weight measurement system (36) enabling the mass of the buffer container (26) to be measured.

14. Bag filling station according to any one of claims 6 to 16, characterized in that the buffer container (26) comprises a bottom (28), at least one side wall (30) which has a lower edge connected to the bottom (28) and an upper edge, which delimits a top opening (26.1) through which the powdered product is poured, and an outlet opening (32) configured to allow the powdered product to exit the buffer container (26) in a compact and de-aerated state, the outlet opening (32) being located at the bottom (28) and delimited by the lower edge of the side wall (30).

15. Bag filling station according to the preceding claim, characterized in that the buffer container (26) comprises at least one movable hatch (34) between a closed state in which it forms the bottom (28) and closes the outlet opening (32) and an open state in which it completely clears the outlet opening (32).

16. Bag filling station according to any one of claims 14 to 15, characterized in that the side wall (30) of the buffer container (26) is slightly flared in the direction of the outlet opening (32).

17. Bagging installation comprising at least one filling station according to any one of claims 6 to 16.

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