Patent Grant
11434097
The present invention relates to a magazine unit for a packaging machine, in particular a packaging machine for producing sealed packages of a pourable product, even more particular of a pourable food product.
The present invention also relates to a packaging machine, in particular a packaging machine for producing sealed packages of a pourable product, even more particular of a pourable food product.
The present invention also relates to a method for loading a magazine unit of a packaging machine, in particular a packaging machine for producing sealed packages of a pourable product, even more particular of a pourable food product.
As is known, many liquid or pourable food products, such as fruit juice, UHT (ultra-high-temperature treated) milk, wine, tomato sauce, etc., are sold in packages made of sterilized packaging material.
A typical example is the parallelepiped-shaped package for liquid or pourable food products known as Tetra Brik Aseptic (registered trademark), which is made by sealing and folding laminated strip packaging material. The packaging material has a multilayer structure comprising a base layer, e.g. of paper, covered on both sides with layers of heat-seal plastic material, e.g. polyethylene. In the case of aseptic packages for long-storage products, such as UHT milk, the packaging material also comprises a layer of oxygen-barrier material, e.g. an aluminum foil, which is superimposed on a layer of heat-seal plastic material, and is in turn covered with another layer of heat-seal plastic material forming the inner face of the package eventually contacting the food product.
Packages of this sort are normally produced on fully automatic packaging machines, which advance a web of packaging material from a magazine unit through a sterilization unit for sterilizing the web of packaging material, e.g. by means of chemical sterilization (e.g. by applying a chemical sterilizing agent, such as a hydrogen peroxide solution) or physical sterilization (e.g. by means of an electron beam). Then, the sterilized web of packaging material is maintained and advanced within an isolation chamber (a closed and sterile environment), and is folded and sealed longitudinally to form a tube having a longitudinal seam portion, which is further fed along a vertical advancing direction.
In order to complete the forming operations, the tube is filled with a sterilized or sterile-processed pourable food product, and is transversally sealed and subsequently cut along equally spaced transversal cross sections within a packaging unit of the packaging machine during advancement along the vertical advancing direction.
Pillow packages are so obtained within the packaging machine, each pillow package having a longitudinal sealing band, a top transversal sealing band and a bottom transversal sealing band.
A typical packaging machine for producing the packages comprises:
A typical magazine unit comprises an inlet opening through which a spindle carrying in a wound-up manner the web of packaging material can be introduced into the magazine unit and at least one pair of housing seats configured to rotatably support the spindle carrying the wound-up web of packaging material, the respective housing seats being arranged side-by-side and distanced from the inlet opening so that the wound-up web of packaging material can be retained within the magazine unit.
In particular, each pair of housing seats is arranged such that the spindle has a horizontal orientation with the spindle being placed within the respective pair of housing seats.
Typically, the wound-up web of packaging material, which is carried by the respective spindle is provided in form of a reel. It is furthermore known that a in a production hall a plurality of reels of the web of packaging material are vertically stacked so that each reel can be loaded into the packaging machine, in particular the magazine unit when necessary. Prior to the actual loading of one reel into the magazine unit, the respective reel must be removed from the stack and must be placed within the magazine unit.
It is known that this loading follows a two-step process.
During a first step of the loading of the magazine unit a first cart having two parallel handling arms clamps one respective reel of the web of packaging material between the two respective handling arms and lifts the respective reel up. After that the first cart is moved so as to distance the clamped reel from the other reels. Then the handling arms are turned so as to rotate the clamped reel around an angle of 90°. After that a respective spindle is guided through a respective through-hole of the respective reel so that the spindle carries the reel of web of packaging material. The spindle has a horizontal orientation.
After, during a second step of the loading of the magazine unit, a second cart is approached towards the reel clamped between the handling arms of the first cart. The second cart comprises two parallel side arms, each one carrying a respective seat for receiving a respective engagement portion of the spindle. Then the spindle together with the reel of web of packaging material is transferred to the second cart, in particular by the respective engagement portions of the spindle being placed within the respective seats. After that the second cart together with the spindle and the reel of the web of packaging material is guided to the magazine unit. The second cart is controlled such that the side arms protrude into the magazine unit and then the spindle is placed into the pair of housing seats of the magazine unit. After that the second cart is removed from the magazine unit.
Even though the known packaging machines, in particular the known magazine units, work satisfyingly well, the need is felt in the sector to further improve the known packaging machines, in particular the known magazine units.
In particular, the need is felt to improve the magazine unit so as to facilitate the process of loading the magazine unit.
It is therefore an object of the present invention to provide a magazine unit for a packaging machine to overcome, in a straightforward and low-cost manner, at least one of the aforementioned drawbacks.
In particular, it is an object of the present invention to provide a magazine unit, which can be loaded in an easy and fast manner.
It is a further object of the present invention to provide a packaging machine having a magazine unit to overcome, in a straightforward and low-cost manner, at least one of the aforementioned drawbacks.
It is a further object of the present invention to provide for a method for loading a magazine unit of a packaging machine to overcome, in a straightforward and low-cost manner at least one of the aforementioned drawbacks.
According to the present invention, there is provided a magazine unit as claimed in claim 1.
According to the present invention, there is also provided a packaging machine according to claim 10.
According to the present invention, there is also provided a method for loading a magazine unit according to claim 11.
Preferred embodiments are claimed in the dependent claims.
A non-limiting embodiment of the present invention will be described by way of example with reference to the accompanying drawings, in which:
Number 1 indicates as a whole a packaging machine for producing sealed packages 2 of a pourable product, in particular a pourable food product such as pasteurized milk, fruit juice, wine, tomato sauce, etc., from a tube 3 of a web 4 of packaging material. In particular, in use, tube 3 extends along a longitudinal axis L, in particular, axis L having a vertical orientation.
Web 4 of packaging material has a multilayer structure (not shown). Web 4 comprises a respective layer of fibrous material, normally paper, covered on both sides with respective layers of heat-seal plastic material, e.g. polyethylene.
Preferably, web 4 also comprises a respective layer of gas- and light-barrier material, e.g. aluminum foil or ethylene vinyl alcohol (EVOH) film, and at least one respective first layer and a respective second layer of heat-seal plastic material. The respective layer of gas- and light-barrier material is superimposed on the respective first layer of heat-seal plastic material, and is in turn covered with the second layer of heat-seal plastic material. The second layer of heat-seal plastic material forms the inner face of package 2 eventually contacting the filled food product.
A typical package 2 obtained by packaging machine 1 comprises a longitudinal seam portion and a pair of transversal sealing bands, in particular a transversal top sealing band and a transversal bottom sealing band.
With particular reference to
In particular, isolation chamber 7 is arranged downstream of magazine unit 5 along path P.
In particular, package forming unit 12 is arranged downstream of isolation chamber 7 and tube forming device 8 along path Q.
Preferably, packaging machine 1 also comprises a sterilizing unit (not shown and known as such) adapted to sterilize the, in use, advancing web 4 at a sterilization station, in particular the sterilization station being arranged upstream of forming station 9 along path P.
Preferentially, conveying means 13 are adapted to advance tube 3 and any intermediate of tube 3 in a manner known as such along path Q, in particular from forming station 9 towards and at least partially through package forming unit 12. In particular, under intermediates of tube 3 any configuration of web 4 is meant prior to obtaining the tube structure and after folding of web 4 by tube forming device 8 has started. In other words, the intermediates of tube 3 are a result of the gradual folding of web 4 so as to obtain tube 3, in particular by overlapping the lateral respective edges of web 4 with one another.
With particular reference to
Each reel 18 is formed from a wound-up web 4 and comprises a through-hole so as to receive a respective spindle 19.
In particular, magazine unit 5 is configured to receive and retain at least one spindle 19 carrying in a wound-up manner web 4 or in other words one spindle 19 carrying one respective reel 18.
Each spindle 19 extends along a central axis A.
In more detail, magazine unit 5 comprises:
Preferentially, magazine unit 5 comprises two pairs of housing seats 22 so as to allow for rotatably and removably supporting two spindles 19 carrying the respective web 4 contemporaneously so as to allow for a continuous operation of packaging machine 1 in a manner known as such and not further explained.
With particular reference to
Preferentially, housing seats 22 are arranged such that with the respective spindle 19 being supported by the respective pair of housing seats 22, axis A is transversal, in particular perpendicular to the longitudinal axis of tube forming device 8, even more particular axis A having a horizontal orientation.
Advantageously, magazine unit 5 also comprises at least one pair 23 of guide rails 24, preferentially two pairs 23 of guide rails 24 each one being associated to one respective pair of housing seats 22.
In more detail, the respective guide rails 24 of each pair 23 are arranged side-by-side and each guide rail 24 extends along a respective axis B (see
Preferentially, each guide rail 24 extends along the respective longitudinal axis B, in particular transversal, even more particular orthogonal to axis A when, in use, spindle 19 is supported by the respective pair of housing seats 22. Even more preferentially, axis B has a substantial horizontal orientation.
By providing for pair 23 of guide rails 24, it is possible to avoid to provide for a cart comprising side arms, each having an extension sufficient to place spindle 19 directly into the respective pair of housing seats 22, inside magazine unit 5. By providing for guide rails 24 it is possible to place spindle 19 into the respective pair 23 of guide rails 24 and to transfer spindle 19 to the respective pair of housing seats 22.
Preferentially, each pair 23 of guide rails 24 is also configured to allow for guiding movement of spindle 19 during the removal of spindle 19 away from magazine unit 5.
More specifically, the respective guide rails 24 of each pair 23 are arranged parallel to one another; i.e. the distance between and transversal to guide rails 24 themselves is constant.
Preferentially, magazine unit 5 comprises a support frame 25 carrying housing seats 22 and guide rails 24 and delimiting inlet opening 20. Even more preferentially, magazine unit 5 also comprises elevation adjustment means, in particular moveable feet elements 26, connected to support frame 25, and being configured to locally control elevation of support frame 25.
Preferably, magazine unit 5 also comprises a cover 27 supported by support frame 25 and delimiting an inner space of magazine unit 5 from an outside space. In particular, each pair of housing seats 22 and each pair 23 of guide rails 24 being arranged within the inner space.
With particular reference to
More specifically, each guide rail 24 comprises a respective first end 31 and a respective second end 32 opposite to the respective first end 31.
Even more specifically, each second end 32 is arranged adjacent to the respective housing seat 22 and each first end 31 is arranged in the area of inlet opening 20.
Preferentially, each guide rail 24 comprises at least one first guiding surface 33 configured to guide (support) a respective engagement portion 30 of spindle 19, in particular to the respective housing seat 22. Even more preferentially, each first guiding surface 33 extends from the respective first end portion 31 to the respective second end portion 32.
In particular, in use, spindle 19, in particular the respective engagement portions 30, rolls over the respective guiding surface 33 when being guided from inlet opening 20 to the respective housing seats 22 (see
Preferably, each first guiding surface 33 comprises an initial portion 34 arranged in the proximity of inlet opening 20 and a main portion 35 extending to the respective housing seat 22. In other words, each initial portion 34 carries (comprises) at least one section of the respective end portion 31 and each main portion 35 carries (comprises) at least one section of the respective end portion 32.
Even more preferably, each first guiding surface 33 comprises also an intermediate portion 36 interposed between the respective initial portion 34 and the respective main portion 35.
In particular, in use, while spindle 19 is introduced into magazine unit 5 and prior to being guided to the respective housing seats 22, spindle 19, in particular the respective engagement portions 30, becomes at first placed on (engaged to) the respective initial portions 34.
Preferentially, initial portions 34 are inclined with respect to the respective main portions 35 and are configured to arrange spindle 19 in an initial position.
Even more preferentially, each guide rail 24 also comprises an abutment surface 37 arranged in the area of the respective first end portion 31, in particular being part of the respective first end portion 31, so as to define in cooperation with the respective initial portion 34 the respective initial position. In this way, it is ensured that spindle 19 is not guided to the respective housing seats 22 in an uncontrolled manner.
Preferably, each initial portion 34 descends from (within the proximity of) the respective intermediate portion 36 to the respective abutment surface 37 (i.e. each initial portion 34 has a downward slope). Thus, in use, when the respective spindle 19 is placed on the respective initial portions 34, the respective spindle 19 rolls towards the respective abutment surface 37.
Preferably, each main portion 35 descends from (within the proximity of) the respective intermediate portion 36 to the respective housing seat 22, in particular the downward slope from (within the proximity of) the respective intermediate portion 36 to the respective housing seat 22 ranging between −1° to −5°, even more particular between −1° to −3°. The downward slope allows to facilitate the guidance of spindle 19 carrying in a wound-up manner web 4 towards and to the respective housing seats 22.
In a preferred embodiment, each guide rail 24 comprises a respective support plate 38 mounted to support frame 25 and carrying the first respective guiding surface 33 and the respective abutment surface 37.
In a preferred embodiment, each first guiding surface 33 is of a polymeric material.
With particular reference to
Preferably, each second guiding surface 42 defines together with the respective first guiding surface 33, in particular the respective main portion 35, a guiding channel 43 of the respective guide rail 24 for guiding the respective engagement portion 30 towards or away from the respective housing seat 22.
With particular reference to
Each pair 44 of insertion limit surfaces 45 is configured to delimit movement of the respective spindle 19, in particular prior to engagement of the respective spindle 19 to the respective guide rail 24, along direction D1 parallel to the respective longitudinal axis B and towards the respective pair of housing seats 22.
Each insertion limit surface 45 is arranged in the area of inlet opening 20 and is transversally distanced from (radially distanced with respect to the respective axis B), in particular, is arranged above, the respective first end portion 31 of the respective guide rail 24, even more particular the respective initial portion 34 of the respective guiding surface 24.
In particular, each pair 44 of insertion limit surfaces 45 is configured to guarantee that, in use and during the insertion of a respective spindle 19 into magazine unit 5, spindle 19, in particular the respective engagement portions 30, is/are at first placeable onto the respective initial portions 34. In other words, insertion limit surface 45 are configured to avoid that spindle 19, in particular the respective engagement portions 30, may be placed onto the respective main portions 35 in such a way that spindle moves in a non-controlled manner towards and into housing seats 22.
In more detail, each insertion limit surface 45 comprises an abutment portion 46 transversally distanced from the respective initial portion 35 and being configured to delimit the position of the respective spindle 19 along direction D1. Preferably, each insertion limit surface 45 also comprises a guidance portion 47 transversal to the respective abutment portion 46 and extending from inlet opening 20 to the respective abutment portion 46 and being configured to guide spindle 19 towards the respective abutment portion 46. In other words, each guidance portion 47 faces at least one portion of the respective initial portion 34.
In a preferred embodiment, each insertion limit surface 45 is mounted to support frame 25.
With particular reference to
Preferentially, each housing seat 22 comprises a fixed seat portion 48 configured to house at least one first section of the respective spindle 19 with the respective housing seat 22 being controlled in the locking configuration and a moveable seat portion 49 being configured to move between an extracted position in which the moveable seat portion 49 is configured to receive at least one second section of the respective spindle 19 and in a retracted position for placing at least the first section of the respective spindle 19 in the respective fixed seat portion 48.
In particular, each pair of housing seats 22 is controlled in the respective receiving configuration and the respective locking configuration with the respective moveable seat portions 49 being respectively in the respective extracted position and in the respective retracted position.
By providing a fixed seat portion 48 and a moveable seat portion 49 of each housing seat 22 and by placing the respective spindle 19 in the respective fixed seat portion 48 during operation of packaging machine 1 it is guaranteed to have a precise and robust advancement of web 4 from the respective spindle 19.
Preferentially, magazine unit 5 comprises an actuation device adapted to control moveable seat portions 49 between the extracted position and the retracted position so as to control each pair of housing seats 22 between the receiving configuration and the locking configuration.
Even more preferentially, the actuation device comprises a plurality of actuators 51 (only one shown), each one connected to one respective moveable seat portion 49 and being configured to move the respective moveable seat portion 49 between the respective extracted position and the respective retracted position.
Preferentially, magazine unit 5 also comprises at least one pair of sensor devices (not specifically shown), in particular two pair of sensor devices, each pair of sensor devices being associated to one respective pair of housing seats 22.
More specifically, each sensor device, e.g. being a proximity sensor, is associated to one respective moveable seat portion 49 and is configured to detect and/or determine the correct insertion of at least the second section into the moveable seat portion 49 with the moveable seat portion 49 being in the extracted position.
Preferentially, the actuation device is configured to simultaneously move the respective moveable seat portions 49 of one respective pair of housing seats 22 from the respective extracted position to the respective retracted position if, in use, both sensor devices of the respective pair of sensor devices detect and/or determine the correct insertion of the respective second section.
In use, packaging machine 1 forms packages 2 filled with the pourable product.
In more detail, conveying means 13 advance web 4 from magazine unit 4 along advancement path P. In particular, during advancement of web 4 along advancement path P web 4 is unwound from a respective spindle 19, the respective spindle 19 rotating around the respective axis A.
In further detail, conveying means 13 advance web 4 to forming station 9 at which web 4 is formed into tube 3. Then conveying means 13 further advance tube 3 along path Q to package forming unit 12. During the advancement of tube 3, filling means 11 fill tube 3 with the pourable product.
Package forming unit 12 forms and transversally seals tube 3 and, preferentially, also transversally cuts tube 3 so as to obtain packages 2.
Preferentially, conveying means 13 advance web 4 by unwinding web 4 from one spindle 19 being placed within the respective pair of housing seats 22.
Prior to operation of packaging machine 1 it is possible to execute a loading process of magazine unit 5 during which at least one spindle 19 carrying in a wound-up manner web 4 is placed within magazine unit 5. In particular, as in the preferred embodiment magazine unit 5 comprises two pairs of housing seats 22 it is possible to also place another spindle 19 carrying in a wound-up manner web 4 during the operation of packaging machine 1.
The loading of magazine unit 5 comprises at least the steps of:
In more detail, during the step of engaging, the respective engagement portions 30 of spindle 19 are placed onto the respective initial portions 34 of the respective guide rails 24. As each initial portion 34 is inclined with respect to the respective main portion 35, in particular declining from the respective intermediate portion 36 to the respective abutment surface 37 with a downward slope, the respective spindle 19 is biased into the respective initial position.
In even further detail, during the step of engaging and, in particular prior to placing the respective engagement portions 30 onto the respective initial portions 34, the respective spindle 19 carrying the wound-up web 4 (or in other words, carrying one respective reel 18), in particular the respective engagement portions 30, is/are placed transversally displaced from (radially displaced from with respect to the respective axis B), in particular above, initial portion 34. In particular, the respective spindle 19 is moved towards inlet opening 20 and is directed along direction D1 through inlet opening 20 into magazine unit 5. At some point during directing the respective spindle along direction D1, the respective spindle 19 interacts with the respective pair 44 of insertion limit surface 45 so as to guarantee to place the spindle 19, in particular the respective engagement portions 30, transversally displaced from (radially displaced with respect to the respective axis B), in particular, above, the respective initial portions 34. Then, the respective spindle 19, in particular the respective engagement portions 30, can be placed onto the respective initial portions 34, in particular by lowering the respective spindle 19.
Preferentially, during the step of engaging, spindle 19 and wound-up web 4 are handled by a cart 52 having two parallel handling arms 53 (see
Even more preferentially, prior to the step of engaging, cart 52 is loaded.
More specifically, during a step of loading of cart 52, at first one respective reel 18 is clamped between the respective handling arms 53 and then the respective spindle 19 is guided through the respective through-hole of the respective reel 18.
Even more specifically, the respective reel 18 is stored without the respective spindle 19 such that the respective central axis defined by the respective through-hole has a vertical orientation. In particular, the respective reel 18 is stacked with other reels 18. Thus, at first the respective reel 18 is clamped between the respective handling arms 53, preferentially is removed from the stack, and then a rotation of about 90° of the respective reel 18 is actuated by rotation of the respective handling arms 53. Then the respective spindle 19 is introduced through the respective through-hole.
In more detail, during the step of moving, the respective engagement portions 30 of the respective spindle 19 are rolled, in particular by an operator, from the respective initial portions 34 over the respective main portions 35 to the respective housing seats 22. In particular, during the rolling over the respective main portions 35, the rolling action is facilitated by providing for a downward slope of the respective main portions 35 from the respective intermediate portions 36 to the respective housing seats 22.
Preferentially, the loading process of magazine unit 5 also comprises the additional steps of:
In this way, it is possible to obtain a precise and secure advancement of web 4 as the respective spindle 19 only rotates during the advancement of web 4 around the respective axis A and any linear movement is suppressed.
In more detail, during the step of controlling the respective pair of housing seats 22 in the respective receiving configuration, the respective moveable seat portions 49 are moved, in particular by operation of the actuation device, in the respective extracted position; and during the step of controlling the respective pair of housing seats 22 in the locking configuration the respective moveable seat portions 49 are moved, in particular by operation of the actuation device, into the respective retracted positions.
Preferentially, the loading process of magazine unit 5 also comprises the additional step of detecting and/or determining whether the respective spindle 19 is correctly placed within the respective pair of housing seats 22.
In more detail, during the step of detecting and/or determining, the respective sensor devices detect whether the respective spindle 19, in particular respective second sections of the spindle 19, are correctly placed within the respective moveable seat portions 49.
Preferentially, the step of controlling the respective pair of housing seats 22 into the respective locking configuration is only executed if the respective spindle 19 is correctly placed within the respective pair of housing seats 22, i.e. only if the respective second sections of the respective spindle 19 are correctly placed within the respective moveable seat portions 49.
The advantages of magazine unit 5 according to the present invention will be clear from the foregoing description.
In particular, by providing for pair 23 of guide rails 24 it is possible to avoid to use two handling carts during the loading of magazine unit 5. Handling cart 52 is sufficient to remove the respective reel 18 from the stack of reel 18, to carry the respective reel and to engage the respective spindle 19 to the respective pair 23 of guide rails 24. Otherwise, the dimensions of handling cart 52 and the spaces present within magazine unit 5 would not allow to place the respective spindle 19 directly into the respective pair of housing seats 22.
A further advantage resides in providing for a first guiding surface 33 having an initial portion 34 and a main portion 35. This allows an operator to easily control the transfer of the respective spindle 19 carrying the wound-up web 4 into the respective pair of housing seats 22. This is even further facilitated by providing for the respective downward slopes.
Clearly, changes may be made to magazine unit 5 as described herein without, however, departing from the scope of protection as defined in the accompanying claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 18153848 | Jan 2018 | EP | regional |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2019/051210 | 1/18/2019 | WO |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2019/145222 | 8/1/2019 | WO | A |
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| Number | Date | Country |
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| 0283086 | Sep 1988 | EP |
| Entry |
|---|
| International Search Report (PCT/ISA/210) dated Apr. 15, 2019, by the European Patent Office as the International Searching Authority for International Application No. PCT/EP2019/051210. |
| Written Opinion (PCT/ISA/237) dated Apr. 15, 2019, by the European Patent Office as the International Searching Authority for International Application No. PCT/EP2019/051210. |
| Number | Date | Country | |
|---|---|---|---|
| 20210171305 A1 | Jun 2021 | US |
