EP3911593A1 - Procédé de formation d'un fond de recipient en matiere plastique, comprenant une etape de controle de l'inversion d'un diaphragme situe au fond du recipient - Google Patents
Procédé de formation d'un fond de recipient en matiere plastique, comprenant une etape de controle de l'inversion d'un diaphragme situe au fond du recipientInfo
- Publication number
- EP3911593A1 EP3911593A1 EP20705415.6A EP20705415A EP3911593A1 EP 3911593 A1 EP3911593 A1 EP 3911593A1 EP 20705415 A EP20705415 A EP 20705415A EP 3911593 A1 EP3911593 A1 EP 3911593A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- diaphragm
- inversion
- curve
- pusher
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
- B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
- B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
- B67C3/22—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
- B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
- B67C3/007—Applications of control, warning or safety devices in filling machinery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D79/00—Kinds or details of packages, not otherwise provided for
- B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
- B65D79/008—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars
- B65D79/0081—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars in the bottom part thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
- B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
- B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
- B67C3/22—Details
- B67C3/24—Devices for supporting or handling bottles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
- B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
- B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
- B67C3/22—Details
- B67C2003/226—Additional process steps or apparatuses related to filling with hot liquids, e.g. after-treatment
Definitions
- the object of the invention is the manufacture of containers, such as bottles, which are obtained by blowing or stretch-blow molding of
- thermoplastic material for example P.E.T.
- P.E.T. thermoplastic material
- the term "hot” signifying that the temperature of the container is close to, or greater than, the glass transition temperature. of the material of the container.
- the container can therefore become oval or deform in any other anarchic manner, which can cause handling or aesthetic problems.
- the diaphragm is in the form of a bowl, the concavity of which is turned towards the interior of the container.
- the diaphragm is contained in a ring terminating in a peripheral seat.
- the diaphragm after filling and closing, the diaphragm is pushed inwards using a suitable device, in order to reverse it, so that at the end of this operation, it is in the form of a vault whose convexity is turned towards the interior of the container.
- the device consists of:
- a lower support plate also called a saddle, annular fixed relative to a frame of the device, which saddle is crossed by a central orifice and comprises a receiving plane surrounding said orifice to receive the seat of the container;
- a pusher which can be actuated by drive means, is arranged under the bottom of the container and is movable, in a vertical direction through the orifice in the saddle, and has a outer shape which can substantially correspond to the shape of the diaphragm after inversion; • finally, an upper support part, which part is fixed to the end of an upper connecting block which can be moved vertically relative to the saddle between a high position allowing the installation of the container in the device. and a low position in which the container is held during inversion.
- the seat of the container Before inversion, the seat of the container is placed on the annular plate and the pusher is in a retracted position, so that no part of the pusher is in contact with the diaphragm. At this point, it should be noted that when the container has a
- the aforementioned central hole of the harness is dimensioned in such a way that it allows the entire protruding area of the diaphragm to pass through the orifice so that the seat, which then surrounds the diaphragm, is placed on the harness.
- the connecting block is placed in the low position, so that the support part is positioned above the container, in fixed contact with an upper part of the latter (such as its neck).
- the pusher When the pusher is actuated, it rises towards the diaphragm, then pushes it back through the hole in the plate to a final inversion position.
- the diaphragm reverses under the effect of the opposing forces appearing between the pusher and the support piece, so that it takes on its arch shape.
- peripherals of the container body deform like a bellows, and the container therefore elongates, which causes an increase in its internal volume and a decrease in pressure until the forces due to the internal pressure balance with the resistive forces of the container body.
- a first alternative solution envisaged consists of an inversion device in which there is provided, on the one hand, a fixed member in the form of a pusher arranged under the bottom of the container, on the other hand, a support saddle, movable vertically with respect to a frame of the device, which fifth wheel is crossed by a central orifice allowing the passage of the pusher and comprises a receiving plane surrounding said orifice to receive the seat of the container and, finally, a movable member in the form of 'an upper support piece, movable, operable by drive means and fixed to the end of a connecting block
- the support piece can be moved vertically relative to the saddle between a high position allowing the placement of the container in the device and a low position allowing inversion. It is therefore the opposing forces between the support part (mobile) and the pusher (fixed), which cause the inversion.
- this device has the drawback that it requires the saddle to be lowered independently of the support piece, in order to release the seat from the container, while the force inversion is transmitted by the drive means of the support piece, which, when it descends, compresses the container between this member and the pusher, and causes the diaphragm to rise.
- This solution does not provide for a control step to verify that the inversion is correct.
- a second solution consists in providing a fixed member, in the form of a support part which remains fixed during the inversion (this support part can however possibly be raised to allow the prior placement of the container), a movable member in the form of a movable pusher, disposed below and operable by drive means and, finally, a support fifth wheel, movable vertically with respect to a frame of the device, which fifth wheel is traversed by a central orifice allowing the passage of the pusher and comprises a receiving plane surrounding said orifice for receiving the seat of the container.
- the pusher is raised while the fifth wheel is lowered to allow, when the diaphragm is formed, the seat is released.
- the descent of the harness as such has drawbacks: in fact, the level of the upper surface of the harness, therefore the receiving surface of the receptacles, is often a reference on the conveyor lines and it is therefore useful and preferable to keep this fixed level, so that it is equal to that of the receiving surfaces of the conveyors and other equipment constituting the production line.
- a movable member in the form of a movable pusher which passes through a fixed saddle and a support part movable vertically over a short predetermined distance so that, when the pusher is reassembled, it pushes the container upwards, which itself drives the support part upwards, which moves the seat of the saddle apart, allowing the container to expand longitudinally.
- the presence of a fixed saddle facilitates handling of the container before, during and after inversion.
- a sequence for checking the correct inversion of the diaphragm by implementing an operation making it possible to determine the height of the arch after inversion of the diaphragm. diaphragm.
- This operation is carried out, after inversion and return of the pusher to its initial position, by placing the container on the saddle (for this purpose, means press on the shoulder of the container or on the stopper itself) and by causing a new movement (an ascent) of the pusher until it comes into abutment against the arch and determining its position when it reaches the stop.
- means which will not be fully explained again here because their knowledge is not necessary for the understanding of the present invention, are implemented so that the movement of the pusher stops when it arrives in stop.
- the diaphragm is considered to be correctly inverted or not.
- the container can be taken out of the lot (in case of incorrect inversion) or continue the process of
- the object of the invention is to remedy this drawback by proposing a method for controlling the correct inversion of a diaphragm, which is applicable to the containers obtained by the implementation of methods according to which the stresses exerted on the container are released during of the diaphragm inversion phase, therefore the methods summarized above, including the method which is the subject of the French patent application
- the inversion movement of the diaphragm accelerates suddenly and the latter comes take its final form by turning around quickly.
- the forces exerted on the diaphragm due to the relative closeness between the push member and the pusher cause an impulse which initiates the inversion of the diaphragm which continues to form by reversing spontaneously without any constraint. is no longer applied. It is thus understood that the speed of reversal of the diaphragm comes to exceed the relative speed of approach between the fixed member and the mobile member. In a way, the diaphragm can be likened to a bistable membrane.
- the phenomenon is comparable to what happens when a curved surface (such as a sheet metal surface) undergoes an impact on its convex side and sees its curvature being reversed under the effect of the impact (sinking phenomenon), without the organ which caused the shock necessarily accompanies the entire deformation movement.
- the diaphragm may suddenly move away from the pusher for a brief moment and / or the upper part of the container which is in contact with the support part may suddenly depart from it.
- the thrust exerted by the organs acting for the reversal becomes less.
- the diaphragm moves faster as the organs come closer to each other, which causes a kind of jerk of the container with respect to the fixed member and / or the movable member and can generate vibrations in the device. 'inversion. Then, the movable member, whether it is the pusher or the support piece, which is programmed to perform a stroke of a given amplitude, then continues its stroke until it reaches this amplitude, so that , at the end, the pusher and the support piece are again come into contact with the container, that is to say that at the end of the inversion process the diaphragm returns to contact with the pusher and the upper part of the container is in contact with the support part.
- the diaphragm does not move away from the pusher and / or that the upper part of the container does not move away from the bearing part can be explained as a consequence of stresses resulting from poor injection of the preform which was used for the manufacture of the container or else for poor thermal conditioning of the preform before the container was formed or else for poor adjustment of the blowing parameters of the container.
- the diaphragm completes its inversion on its own, it is a sign that the constituent material of the diaphragm and, finally, of the arch is sufficiently relaxed to go to take its final position alone.
- the invention consists in taking advantage of this phenomenon.
- a method of forming, in an inversion device, a bottom of a filled and closed plastic container comprising a step of inverting a diaphragm located at the center of the bottom of the container and surrounded by a seat forming a laying plane, during which two opposed thrust members are set in relative movement with respect to each other in order to come into contact with and put pressure on two longitudinally opposed zones of the container, namely on the one hand a pusher, placed under a zone situated in the lower part of the container facing the diaphragm in order to raise it up towards the top of the container, on the other hand an upper support part which bears against a zone of the container situated in the upper part of the container, opposite the diaphragm, in order to counter the forces of the diaphragm ascent, while the seat is free of any constraint in order to allow a longitudinal expansion of the container under the effect of the internal pressure caused by the displacement of the diaphragm when 'it is driven up the container;
- the invention is particularly advantageous, since it allows at the very moment of the inversion to determine whether the diaphragm will be
- actuation and the curve representative of the force applied to the diaphragm to move it during the inversion, on which is sought said variation is a curve representative of the force applied to the actuation means and, consequently, to the diaphragm, for move it, and the desired variation on said curve is representative of a decrease in said applied force;
- the means for actuating a thrust member being constituted by an electric motor
- the curve representative of the force applied to said member to move it is a curve of the drive current of said motor and the determination of the decrease in power.
- force applied by at least one of the thrust members with respect to the zone of the container with which it is in contact is effected, by finding on said curve of the current for driving said at least one displaced member, a variation consisting in a reduction in the current representative of the reduction in the forces necessary for driving said at least one thrust member.
- the curve representative of the force applied to the diaphragm to move it during the inversion, on which the said variation is sought is an acoustic measurement curve representative of the noise surrounding the bottom of the container during the inversion of the diaphragm and it is carried out on this curve a search for a variation of the sound reflecting the appearance of a significant sound of a shock which occurs when a thrust member which has
- the curve representative of the force applied to the diaphragm to move it during the inversion, on which the said variation is sought is a representative vibration measurement curve vibrations surrounding the bottom of the container during the inversion of the diaphragm and a variation is sought on this curve reflecting the appearance of accentuated vibrations which occur in the inversion device when the diaphragm is suddenly reversed due to the relaxation of the efforts of the thrust members;
- the curve representative of the force applied to the diaphragm to move it during the inversion, on which said variation is sought is an optical measurement curve of the distance between each thrust member and the zone of the container against which it is initially in contact, and a variation is sought on this curve consisting of an increase in said distance reflecting the appearance of at least one gap between a thrust member and the zone of the container against which it is initially in contact for an instant of the diaphragm inversion phase;
- the optical measurement is performed using means arranged at the periphery of the container;
- the curve representative of the force applied to the diaphragm to move it during the inversion, on which said variation is sought is a curve for measuring the presence of a contact between each thrust member and the zone of the container against which it is initially in contact, and a variation is sought on this curve consisting in determining the loss of contact between at least one thrust member and the zone of the container against which it is initially in contact during an instant of phase d inversion of the diaphragm;
- Another subject of the invention is a device for implementing the method, according to which:
- the device comprises a first thrust member constituted by a movable pusher, in a vertical direction relatively, on the one hand, to a second thrust member constituted by an upper support part and, on the other hand, to a fifth wheel , which is provided with a central orifice and constitutes an annular receiving plane making it possible to receive the seat of a container before and after the phase of inversion of its diaphragm, and it is arranged so that the saddle is remote from the 'seat of the container during the inversion phase so that, during this phase, a space is created between the seat and the saddle to allow longitudinal expansion of the container under the combined effect of the increase in the internal pressure caused by the decrease in volume due to the inversion and the forces generated inside the container by the pusher and the support piece;
- the device comprises a frame and the pusher is mobile in
- the device comprises a frame and the pusher can be actuated by drive means through the fifth wheel, the fifth wheel is fixed relative to the frame, and the upper support piece is fixed to the end of a block upper link that can be moved vertically relative to the saddle between a high position allowing the positioning of the container in the device and a low position in which it is held for
- the inversion, and the upper support piece is movably connected relative to the block by being linked to the latter by means of elastic connection means in compression;
- the device comprises a frame, the pusher is a fixed element placed under the bottom of the container, the fifth wheel is mobile
- the upper support part can be actuated by drive means
- the pusher is movable through the fifth wheel relative to a frame of the device and the upper support piece is movable relative to said frame of the device.
- FIG. 1 is a schematic view illustrating a device on which the invention can be implemented and its various components, while a container is positioned on the harness, before initiation of the step
- This view features a medallion with an enlarged detail of the top bearing piece
- FIG.2 is a schematic view illustrating the device while the pusher is in the intermediate position and the diaphragm inversion is in progress;
- FIG.3 is a schematic view illustrating the device after inversion, and after the pusher has returned to the low position
- FIG.5 is a representative view of the current curve
- This device 1 enables the diaphragms of containers 2, such as bottles, to be inverted.
- containers 2, such as the one illustrated comprise a body 3, here cylindrical, extended above by a shoulder 4 itself surmounted by a neck 5.
- the container 2 is provided with a bottom 6 comprising a diaphragm 7, here of circular section, but being able to have other shapes allowing its
- the container 2 is in its configuration after manufacture by blow molding or stretch-blow molding, and the diaphragm 7 is in the general form of a bowl, the concavity of which is turned towards the inside of the container 2.
- the container 2 is cylindrical of revolution and its body 3 is reinforced by horizontal grooves 10.
- it could have a shape such as a shape that fits more or less into a square (container or bottle called “carronde”) or any other section.
- the diaphragm would retain a rather circular section.
- the outer contour of the ring 8 would be designed to extend the shape of the body and come to die on the seat 9.
- the shoulder 4 of the container for its part, is bubble-shaped. It too could adopt any known shape (frustoconical, flute-shaped, etc.).
- the device 1 is designed to invert diaphragms 7 of filled and stoppered containers. Also, the receptacle 2 is presented with closure means 11, such as a cap screwed onto the neck 5.
- the device 1 is carried by a frame 12 (partially shown) and comprises a lower support fifth wheel 13, fixed relative to said frame 12 (the connection between the fifth wheel 13 and the frame 12 is not shown. but is within the reach of those skilled in the art), which saddle 13 is traversed by a central orifice 14 and delimits an upper receiving plane 15, surrounding said orifice 14 to receive the seat 9 of a container.
- a pusher 16 constituting a movable thrust member, is provided, which is movable through the central orifice 14 of the saddle 13 according to a vertical direction by drive means (not shown) integral with the frame 12 and the pusher 16, but include for example an electric motor.
- the drive means allow that the pusher 16 can be moved from a retracted position (that of Fl G .1) in which it is for example entirely below the upper plane of the fifth wheel 13, to a position final reversal (not visible in the figures, but which is above that of FIG. 2), in which it is above the upper plane of the harness 12.
- the pusher 16 has a corresponding outer shape, of
- the pusher 16 could be less elaborate: for example, it could be a rod adapted to push the center of the diaphragm.
- the device 1 also comprises an upper bearing part 17 which constitutes a fixed thrust member.
- this support piece 17 is intended to press on the plugged container 2 when the latter is in place on the saddle 13 and thus counter the force of the pusher 16 when the latter is moved towards the inversion position.
- the support part 17 consists of a bell-shaped part, which covers the stopper means 11 (and therefore the neck 5 of the container) and comes to bear on a zone of the shoulder 4 slightly under the neck 5.
- the support piece 17 could be constituted by a pressing piece.
- the bell is more advantageous, in that it generates less stress on the container 2.
- pressing on the closure means 11 generates pressures at the junction between the neck 5 and the shoulder 4, which is an area of small section and not at all stretched, therefore fragile, while the bell presses on a larger section, so that the support pressure is less (for an equivalent force applied).
- the support piece 17 preferably rests on the entire circumference of the shoulder. It should however be noted that it could include a portion of its truncated wall, so as to allow release of the bottle during the loading / unloading phases on the saddle 13, and limit thus the movement of the block 18 when the device 1 is carried on a carousel or is movable relative to a loading zone and / or an unloading zone of the containers 2.
- the support piece 17 is fixed to one end, located opposite the fifth wheel 13 and the pusher 16, of a connecting block 18 connected to the frame 12 by a translational connection allowing the block (18) to be moved. vertically relative to the saddle between a high position allowing the placement of the container in the device and a low position in which the block 18 is held during the inversion.
- the block 18 is fixed to the end of a shaft 19 mounted to slide in the vertical direction in a sleeve 20 carried by the frame 12.
- the block 18 can be near or far from the harness 13.
- the shaft 19 and therefore the block 18 are connected to a mechanism which allows an up and down movement of the shaft 19 and of the block 18 and a firm holding in the lower position of the shaft 19 and of the block 18 during the reversal and control.
- the various figures illustrate the block 18 in the low position in which it is firmly held during the inversion.
- the mechanism which allows said up and down movement of the crew formed by the shaft 19 and the block 18 is for example a cam and roller mechanism.
- a roller 21 is
- the mechanism can comprise, above the roller 21 a first cam, called the high cam and below a second cam (also called the low cam or counter cam).
- the two cams are used to guide the roller 21 for the ascent or descent of the crew formed by the shaft 19 and the block 18, the upper cam pressing on the roller and avoiding the
- the support piece 17 is movably connected to the block 18 by
- connection means in compression are arranged so that said member is itself movable in translation relative to the block 18 in a direction perpendicular to the plane of the harness and so that, in the absence of a receptacle between the harness 13 and the part 17 of support, the latter is in a first extreme position, low relative to the block 18, and so that, when a pressure greater than the minimum return force of the elastic connection means in
- the elastic connection means in compression visible on the medallion of the F I G .1, are arranged as described below.
- the block 18 is hollowed out, at its end opposite the shaft 19, with a housing 22 oriented along the axis XX of the installation 1, namely an axis which passes through the center of the central orifice 14 of the harness. 13, and which coincides with that of the shaft 19, of the pusher 16, of the support piece 17 and of the block 18 itself.
- the housing therefore opens in the direction of the support part 17.
- the bearing part 17 is fixed, at its upper part, for example by screwing, to a rod 23 which ends, at its end opposite to the bearing part 17, by an annular ring 24 forming a flat head surrounding this end.
- the part of the rod 23 located between the crown 24 and the support part 17 is positioned in a sleeve 25 in which it can slide freely.
- the length of this part of the rod 23 is therefore greater than the length of the sleeve 25, leaving room free to position a spring 26 working in compression around the rod 23 between the thrust member and the sleeve 25. If we consider l 'orientation of the figures, where the support piece 17 is arranged under the sleeve 25, the spring 26 is therefore positioned above the support piece 17 and under the sleeve 25. Thus, in the absence of thrust from the bottom up (considering the orientation of FIG.
- the spring 26 tends to maintain this support part 17 in a position away from the sleeve 25 (by pushing it downwards, if we still consider the orientation of the figure) and the crown 24 is then in abutment above the sleeve 25. It is important to note that the dimensions of the rod 23, of the sleeve 25 and of the spring 26 are such as to allow upward movement of the support piece 17 when a thrust is exerted under it. this.
- the sleeve 25 is fitted into the housing 22, so that the ring 24 and therefore the upper end of the rod 23 are placed inside the housing 22.
- the sleeve 25 and the housing 22 are arranged so that , when the sleeve 25 is in place, there is a gap between the upper end of the rod 23 and the upper wall 27 of the housing 22, to allow the rod 23 to slide freely in the sleeve 25 when the support piece 17 is solicited from bottom to top.
- the dimensions of the rod 23, of the sleeve 25 and of the spring 26 are such that in the absence of bias from the bottom up against the support part 17, the distance between the top of the support part 17 and the bottom of the sleeve 25 allows upward movement of the support piece 17 over a predetermined maximum distance d when a thrust is exerted from the bottom upwards against the support piece 17.
- the distance between the upper end of the rod 23 and the upper wall 27 of the housing 22 is such that it is at least equal to the maximum distance d to allow the displacement of the supporting part 17 relatively in block 18.
- means, such as a finger 28 are provided to prevent any rotation in the block 18 of the assembly constituted by the part 17 support and the rod 23.
- the finger 28 is fixed for example by screwing in a thread 29 formed in the upper wall 27 of the housing 22 and the finger 28 passes through a hole formed in the crown 24, which prevents any rotation, but does not prohibit a
- the value of the distance between the top of the support piece 17 and the bottom of the sleeve 25 or, alternatively, the value of the distance between the upper end of the rod 23 and the upper wall 27 of the housing 22 is such that the maximum distance d that the support part 17 can travel is less than 10 mm, for example between 3 mm and 8 mm.
- a stroke over a distance d of 4 mm is suitable for receptacles 2 constituted by 1 l bottles.
- Adjustment means are provided in the device so that, when a receptacle 2, the diaphragm 7 of which must be inverted, is in place on the saddle and that the block 18 reaches the low position, the support piece 17 reaches itself in contact with the container 2, without pressing on the latter, or even slightly away from it.
- the device 1 must in fact be adapted taking into account the dimensions of the container 2 to be treated, in particular its height.
- the adjustment can be carried out for example by modifying the position of the roller 21 on the shaft 19 and / or by modifying the position of the cam (not shown) which cooperates with the roller 21.
- this device Before inversion, a container 2 filled and stoppered beforehand is placed on the saddle 13, while the support piece 17 is raised high enough not to interfere with the stopper 11.
- the support piece 17 is raised by ascending the assembly formed by the shaft 19 and the block 18 to which it is mechanically linked by the rod 23 and the sheath 25.
- the support piece 17 is then lowered to come into contact with the container 2, here in contact with the shoulder 4, without pressing it at this stage for the low tolerance of the height of the container 2.
- the ascent of the pusher 16 is initiated, by applying the inversion force thereto. Because the container 2 is filled and closed, it has a certain mechanical rigidity. This added to the fact that the structure of the installation is such that the inversion force is greater than that exerted by the spring 26 on the support part 17, the rise of the pusher 16 causes a rise of the container 2, of which the 'seat 9 moves away from the saddle 13 by going up above the upper plane 15 of the latter, and the container 2 itself pushes the support part 17 upwards, until the distance d maximum has been traveled. As a result, the seat 9 moves away from the upper plane 15. During this raising of the support piece 17, the inversion of the diaphragm 7 can begin and
- the elongation of the container 2 also, so that when the support piece 17 reaches its upper position, the seat 9 can be moved away from the upper plane of the saddle by a distance less than the distance d.
- FIG.2 when the support piece 17 has traveled the maximum distance d, the seat 9 is located away from the upper plane 15 of the fifth wheel 13, at a distance from this plane.
- the value of this distance can be
- the support piece 17 corresponds to that of the maximum distance d or be less insofar as, during the initial ascent, the inversion, which is mentioned below, as well as the extension of the container 2 could have started so that when the support piece 17 reaches its high position, the seat 9 can be moved away from the upper plane 15 of the harness by a distance less than the distance d. In this way, the support piece 17 is in contact against block 18 and the residual value dres of the distance is zero.
- the pusher 16 continues to rise to reverse the diaphragm 7 (or finish the reversal if it started earlier when the pusher 16 is raised).
- the following phenomenon then occurs.
- the deformation of the diaphragm 7 towards the interior of the container 2 causes an increase in the internal pressure in the container 2, which is first of all compensated for by a compression and therefore a reduction in the volume of air which remains in the neck (l headspace) of the container, the liquid contained in the container 2 retaining its volume, due to its incompressibility.
- the forces generated by the pusher 16 and the supporting part 17 inside the container 2 become such that the container 2 is subjected to internal stresses which tend to push back its walls.
- the distance caused during the ascent of the pusher 16 between the seat 9 and the upper plane 15 of the saddle 13 makes it possible to release a zone of constraints, and the forces generated which tend to push back the walls cause a longitudinal expansion of the container. 2, so that, at the end of the inversion, the seat 9 has moved closer to the upper plane 15 of the saddle 13 while the support piece 17 is still in the upper position.
- the pusher 16 then continues its course until the diaphragm 7 reaches its final position, visible on the flG.3.
- the diaphragm 7 It is generally when the diaphragm 7 reaches the position of FIG. 2 that, normally, it spontaneously accelerates its inversion movement and reaches its final inversion position while the pusher 16 continues its travel without however exerting any pressure against the diaphragm 7, until the container 2 is again caught between the pusher 16 and the support piece 17. If this phenomenon occurs, it is considered that the container 2 is correctly formed; in the opposite case, that is to say when the diaphragm is formed only by the thrust, without spontaneous acceleration, then, in this case, although the diaphragm 7 may appear to be correctly formed, the fact remains that there is a strong risk that the container will not withstand the stresses of use.
- the pusher 16 is driven by means, not shown, such as an electric motor. It is easily understood that, when the diaphragm 7 comes to turn around quickly, the thrust exerted becomes less and it happens that the diaphragm 7 moves away from the pusher 16 or that the shoulder 4 moves away from the support piece 17. Then, the pusher 16 continuing its travel, it returns to contact with the diaphragm and the thrust returns to normal until the end of travel and the descent of the pusher.
- the curve of the driving current of said motor constitutes a curve representative of the force applied to the diaphragm 7 to move it and the determination of the decrease in force.
- applied by the pusher against the zone of the container with which it is in contact is carried out by searching on said pusher drive current curve for a variation consisting in a decrease in the current, which is representative of the reduction in the forces necessary for its drive .
- monitoring of the driving current of the pusher 16 can be used during the reversal phase in order to determine whether the diaphragm 7 comes to overturn quickly. This is illustrated in FIG. 4 and FIG. 5.
- FIG. 4 is shown a curve Cdep of displacement of the drive member of the pusher 16 opposite the curve Ceff of the drive current of the pusher 16, in the case where the inversion of the diaphragm 7 does not include spontaneous acceleration phase.
- the current rises in a relatively regular curve until the end of the pushing movement, then descends again when the pusher 16 is
- FIG. 5 is shown a displacement curve Cdep of the drive member of the pusher opposite the curve Ceff of the drive current of the pusher 16, in the case where the inversion of the diaphragm 7 includes a phase d 'spontaneous removal when the pusher 16 has not reached its extreme ascent position.
- the current rises following a relatively regular curve, then, while the pusher 16 has not reached its extreme position, the spontaneous acceleration of the inversion of the diaphragm 7 occurs, with, concomitantly, a variation Var in the form of 'A decrease in the driving current of the pusher 16.
- This decrease occurs since the diaphragm 7 has moved away from the pusher 16 and / or the shoulder 4 has moved away from the support piece 17.
- the pusher 16 and the supporting part 17 return to nominal contact, and the driving current of the pusher 16 returns to normal: it resumes go up until the arrival of the pusher in the high position, then descend again when the pusher 16 is lowered.
- the means of actuating a thrust member could be other than an electric motor, in which case an appropriate sensor would be used in order to obtain a curve
- the pusher 16 and the support piece 17 could each be movable. In this case, checking the drive current of only one of these two components would be sufficient since, in the event of acceleration of
- the reduction in thrust forces would be felt on both.
- the check would be made on the curve of the driving current of the pusher, since it is this which is in contact with the diaphragm.
- the measurement can be performed on a curve representative of the distance between the thrust members and the respective zones of the container with which these members are in contact. This type of measurement requires that each organ be checked.
- it is a curve giving the signal of sensors arranged on the thrust members, which give a first type of signal when the members are in contact with their respective zone and a second type of signal when 'they are no longer.
- this is a curve representative of an optical measurement: a sensor, such as a camera, is positioned at an appropriate location near each thrust member, in order to determine
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1900408A FR3091829B1 (fr) | 2019-01-17 | 2019-01-17 | Procédé de formation d’un fond de récipient en matière plastique, comprenant une étape de contrôle de l’inversion d’un diaphragme situé au fond du récipient |
| PCT/FR2020/050030 WO2020148494A1 (fr) | 2019-01-17 | 2020-01-09 | Procédé de formation d'un fond de recipient en matiere plastique, comprenant une etape de controle de l'inversion d'un diaphragme situe au fond du recipient |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3911593A1 true EP3911593A1 (fr) | 2021-11-24 |
Family
ID=66867391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20705415.6A Pending EP3911593A1 (fr) | 2019-01-17 | 2020-01-09 | Procédé de formation d'un fond de recipient en matiere plastique, comprenant une etape de controle de l'inversion d'un diaphragme situe au fond du recipient |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12037233B2 (fr) |
| EP (1) | EP3911593A1 (fr) |
| FR (1) | FR3091829B1 (fr) |
| MX (1) | MX2021007787A (fr) |
| WO (1) | WO2020148494A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3091829B1 (fr) * | 2019-01-17 | 2021-02-12 | Sidel Participations | Procédé de formation d’un fond de récipient en matière plastique, comprenant une étape de contrôle de l’inversion d’un diaphragme situé au fond du récipient |
| IT202300009756A1 (it) * | 2023-05-15 | 2024-11-15 | Kosme Srl Unipersonale | Piattello per una macchina a giostra e macchina a giostra che lo comprende |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019122563A1 (fr) * | 2017-12-21 | 2019-06-27 | Sidel Participations | Procédé d'inversion d'un fond de récipient en matière plastique, dispositif pour sa mise en œuvre et utilisation du dispositif |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341946A (en) | 1993-03-26 | 1994-08-30 | Hoover Universal, Inc. | Hot fill plastic container having reinforced pressure absorption panels |
| US9751679B2 (en) * | 2003-05-23 | 2017-09-05 | Amcor Limited | Vacuum absorbing bases for hot-fill containers |
| US9994378B2 (en) * | 2011-08-15 | 2018-06-12 | Graham Packaging Company, L.P. | Plastic containers, base configurations for plastic containers, and systems, methods, and base molds thereof |
| WO2014113371A1 (fr) * | 2013-01-15 | 2014-07-24 | Graham Packaging Company, L.P. | Base de récipient à déplacement variable |
| EP2711152B1 (fr) * | 2013-02-06 | 2015-05-13 | Sidel Participations | Procédé de soufflage d'un récipient remplissable à chaud, à taux d'étirage accrus |
| EP2764967B1 (fr) * | 2013-02-06 | 2015-10-14 | Sidel Participations | Moule pour le soufflage d'un récipient remplissable à chaud à taux d'étirage accrus |
| CN105492369B (zh) * | 2013-09-19 | 2017-10-31 | 西德尔合作公司 | 用于处理具有可倒置隔膜的填充容器的机器和方法 |
| EP2957522B1 (fr) * | 2014-06-17 | 2017-05-03 | Sidel Participations | Récipient muni d'un diaphragme réversible incurvé |
| EP2957515B1 (fr) * | 2014-06-18 | 2017-05-24 | Sidel Participations | Récipient doté d'un diaphragme réversible et d'une partie centrale d'épaisseur supérieure |
| CA2958344C (fr) * | 2014-08-21 | 2022-04-05 | Amcor Limited | Base de recipient a deux etages |
| EP2990344B1 (fr) * | 2014-08-29 | 2017-01-04 | Sidel S.p.a. Con Socio Unico | Procédé et machine de traitement de conteneurs |
| EP3009246A1 (fr) * | 2014-10-16 | 2016-04-20 | Sidel Participations | Préforme présentant une épaisseur variable autour d'un axe principal |
| EP3109176A1 (fr) | 2015-06-23 | 2016-12-28 | Sidel Participations | Récipient muni d'un diaphragme réversible incurvé |
| DE202015106722U1 (de) * | 2015-12-10 | 2017-03-13 | Krones Ag | Etikettiermaschine für Kunststoffbehälter |
| EP3257768B1 (fr) * | 2016-06-17 | 2019-02-27 | Sidel Participations | Récipient muni d'un diaphragme réversible convexe |
| MX2018014814A (es) * | 2016-06-30 | 2019-03-14 | Amcor Rigid Plastics Usa Llc | Bases absorbentes de vacio para envases de llenado caliente. |
| FR3091829B1 (fr) * | 2019-01-17 | 2021-02-12 | Sidel Participations | Procédé de formation d’un fond de récipient en matière plastique, comprenant une étape de contrôle de l’inversion d’un diaphragme situé au fond du récipient |
-
2019
- 2019-01-17 FR FR1900408A patent/FR3091829B1/fr active Active
-
2020
- 2020-01-09 US US17/423,809 patent/US12037233B2/en active Active
- 2020-01-09 WO PCT/FR2020/050030 patent/WO2020148494A1/fr not_active Ceased
- 2020-01-09 EP EP20705415.6A patent/EP3911593A1/fr active Pending
- 2020-01-09 MX MX2021007787A patent/MX2021007787A/es unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019122563A1 (fr) * | 2017-12-21 | 2019-06-27 | Sidel Participations | Procédé d'inversion d'un fond de récipient en matière plastique, dispositif pour sa mise en œuvre et utilisation du dispositif |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020148494A1 (fr) | 2020-07-23 |
| FR3091829B1 (fr) | 2021-02-12 |
| US20220081275A1 (en) | 2022-03-17 |
| MX2021007787A (es) | 2021-08-05 |
| FR3091829A1 (fr) | 2020-07-24 |
| US12037233B2 (en) | 2024-07-16 |
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