Classifications

• • 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
  • B65D45/00—Clamping or other pressure-applying devices for securing or retaining closure members
  • B65D45/02—Clamping or other pressure-applying devices for securing or retaining closure members for applying axial pressure to engage closure with sealing surface
  • B65D45/16—Clips, hooks, or clamps which are removable, or which remain connected either with the closure or with the container when the container is open, e.g. C-shaped
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C33/00—Moulds or cores; Details thereof or accessories therefor
  • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
  • B29C33/442—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with mechanical ejector or drive means therefor
• • 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
  • B65D43/00—Lids or covers for rigid or semi-rigid containers
  • B65D43/02—Removable lids or covers
  • B65D43/0202—Removable lids or covers without integral tamper element
  • B65D43/0204—Removable lids or covers without integral tamper element secured by snapping over beads or projections
• • 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
  • B65D43/00—Lids or covers for rigid or semi-rigid containers
  • B65D43/02—Removable lids or covers
  • B65D43/0202—Removable lids or covers without integral tamper element
  • B65D43/0225—Removable lids or covers without integral tamper element secured by rotation
• • 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
  • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
  • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
• • 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
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00018—Overall construction of the lid
  • B65D2543/00064—Shape of the outer periphery
  • B65D2543/00074—Shape of the outer periphery curved
  • B65D2543/00092—Shape of the outer periphery curved circular
• • 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
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00444—Contact between the container and the lid
  • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
  • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
• • 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
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00444—Contact between the container and the lid
  • B65D2543/00592—Snapping means
  • B65D2543/00601—Snapping means on the container
  • B65D2543/00675—Periphery concerned
  • B65D2543/00694—Segments
• • 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
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00444—Contact between the container and the lid
  • B65D2543/00592—Snapping means
  • B65D2543/00712—Snapping means on the lid
  • B65D2543/00787—Periphery concerned
  • B65D2543/00805—Segments

Definitions

• the present invention relates to the technical field of sealed drums made of plastic materials for the transport of powdery chemical products, in particular products that are very sensitive to humidity, for which an excellent seal with respect to the outside air is sought. .
• the clamping can therefore be achieved only by means of the cover and the tray, without additional part. Furthermore, the mounting of the clamp can not be automated. Thus, the filling of the drum and its automatic closure can not be performed by a robot, without manual intervention.
• the object of the invention is to overcome these drawbacks by providing a high-sealing drum, this sealing being obtained exclusively by means of the container and the lid of the drum, without any additional part.
• Another object of the invention is to automate the filling of the drum with a powdery product, and its tight closure.
• an object of the invention is a sealed drum for transporting a powdery chemical product, with a capacity of at least 20 liters, characterized in that it comprises a tray and a lid each formed in a plastic material, typically by molding, the tray and the lid being generally of revolution about a main axis, the container comprising a bottom and a side wall having an end edge, the lid comprising a cover flange of the edge of end of the tank,
• the bin comprising, in an area of the side wall closer to the end edge than the bottom:
• the collar of the lid comprising an inner wall and an outer wall
• the bosses and the lugs being arranged and configured so that the cover flange can be engaged on the end edge of the trough by translation along the main axis, to bring said lower surface of revolution closer to or in contact with said surface; greater revolution, then, by a rotation of the cover about the main axis, engage each boss between a lug and the circumferential outer ring and thus obtain, in a closed position of the barrel, a clamping of said lower surface of revolution of the cover on said upper surface of revolution of the tray.
• the closure of the barrel does not require any clamping collar, nor any additional part to the tray and the lid.
• the filling and automatic closing of the barrel can then be done by a robot, which was not possible for the barrel of the aforementioned prior art.
• the robot can perform, by using a relative angular positioning of the cover relative to the tray to prevent the lugs and the bosses are axially facing, a first movement of depression in translation of the lid on the tray, this depression being under stress in an end portion of the translation, to ensure a seal on an edge of the tray, as explained below.
• the rotation is typically exerted without support of the boss on and above an inclined surface, for example on a helical surface. There is therefore substantially no helical movement induced by a support of the boss on and above an inclined surface (the contact of the boss with the lug not being such a support).
• the lugs typically extend circumferentially, above the upper surface of revolution.
• a common number of lugs and bosses typically between 6 and 16, and preferably between 8 and 12 inclusive, so as to ensure effective circumferential clamping (sufficiently angularly distributed), without requiring molds. parts manufacturing (tray and lid) too complex.
• bosses typically extend circumferentially above the lower surface of revolution.
• the upper surfaces of revolution of the tray and lower revolution of the lid are planar. This makes the design of the corresponding manufacturing molds easier.
• orientation terms such as “upper”, “lower”, “above”, etc., refer to a normal position of the tray, placed on the ground and where appropriate covered with his lid.
• the axis of the drum, or tray is the vertical axis of revolution of the drum or tray corresponding to this normal position.
• At least one, and preferably each lug is beveled, so as to accentuate the tightening of each lug between a lug and the upper surface of revolution.
• at least one, and preferably each boss is preferably beveled, so as to increase its clamping between a lug and the upper surface of revolution.
• the cover flange of the end edge of the tray comprises an edge called “non-opening control edge", this non-opening control edge comprising:
• a plurality of teeth for engaging, in a first position of closure of the barrel, a plurality of recesses arranged in a corresponding area of the tray, preferably by vertical engagement, these teeth and recesses being arranged and configured so that engagement of the teeth in the recesses is non-reversible,
• the arrangement and configuration of the teeth and recesses is therefore chosen so that the engagement of the teeth in the recesses is substantially non-reversible, that is to say impossible without tearing the periphery of this control edge.
• a contrario the presence of this control edge on the closed shaft proves that the barrel was never opened after its first closure.
• the cover flange of the end edge of the tray comprises an edge called "non-opening control edge", this non-opening control edge comprising:
• a plurality of recesses intended to be engaged, in a position of first closure of the barrel, by a plurality of teeth arranged on a corresponding zone of the tray, preferably by vertical engagement, these teeth and recesses being arranged and configured so that engagement of the teeth in the recesses is non-reversible,
• this non-opening control edge for example slits, making it possible to tear this non-opening control edge during the first opening of the barrel.
• the teeth and the recesses extend from the common level formed, the barrel being closed, by the upper surface of revolution and the lower surface of revolution, in contact with each other.
• each of the teeth and recesses is disposed at the same angular position as a lug and a boss.
• the clamping of the lid on the tray is exerted directly and locally by the lug and the boss, which make the local lid / tray contact substantially non-deformable, so that after engagement of the teeth (for example along an inclined plane to obtain a pawl effect, as described below), this engagement is non-reversible (that is to say that it is not possible to disengage the teeth by a rotational movement of the lid reverse movement Clamping).
• At least one lug and at least one lug respectively comprise a protruding surface and a corresponding hollow surface, intended to be engaged by the projecting surface, these surfaces being arranged and configured so that the engagement of the protruding surface in the recessed surface is reversible, and determines a closed position of the barrel.
• the protruding and recessed surfaces typically each have a smoothly and progressively profiled edge zone of in order to allow the reversibility of the engagement of the prominent surface in that in hollow.
• the prominent surface can be arranged on the boss, and the hollow surface on the lug.
• at least one boss and at least one lug respectively comprise a protruding surface and a corresponding hollow surface, configured so that the engagement of the protruding surface in the female surface is reversible, and determines a closed position of the barrel .
• each lug comprises a prominent surface, and each lug a recessed surface, or vice versa: each boss comprises a prominent surface, and each lug a hollow surface. The determination of the reversible closure position of the barrel is then better ensured.
• this reversible closure of the barrel can be made both manually and automatically.
• the cover flange is configured to allow stress depression of the lid on the tray to a closed position of the barrel, by deformation of the end edge of the tray and / or the collar, and thus obtain a seal between the tray and the lid in a sealing zone disposed on the end edge of the tray.
• the barrel comprises a complementary sealing zone (besides the clamping zone of the lower surface of revolution of the lid on the upper surface of revolution of the tank), making it possible to maintain the seal in the event of leakage at the clamping zone, for example due to the presence of a local defect, such as an accidental scratch.
• the end edge of the tray comprises an outer surface of diameter D and the cover flange comprises, on its inner surface, a docking area with the end edge of the tray, of progressive diameter, whose initial diameter corresponding to a closed position of the barrel is equal to D decreased delta, where delta is less than 5% of D, when the lid is not engaged on the tray.
• the cover flange comprises an external bearing surface and an internal bearing surface, the flange being configured so that when the lid is stacked on another identical lid having a said other bearing surface external, this other external bearing surface comes into contact with said internal bearing surface of the cover, so as to allow support during stacking of the two covers, which prevents their contact at the sealing zone disposed on the end edge of the tray.
• lids can be stacked without the risk of deforming or marking or scratching the sealing area by contacts, dust deposited etc.
• the invention also relates to a sealed drum comprising a powdery chemical such as polytetrafluoroethylene.
• the invention also relates to a mold for manufacturing the lid of the drum, comprising:
• an upper molding element comprising a molding surface for molding at least part of an external surface of said wall of the flange
• At least one lower molding element comprising a molding surface for molding at least part of an inner surface of said wall of the flange
• a movable molding core comprising a lower molding surface of an upper surface of the boss, and radial removal means of this core in a housing associated with the core, so that the radial withdrawal of each core in its housing allows the release of the cover by axial displacement of the molded cover, without blocking because of the bosses.
• the invention also relates to the use of this mold for molding the lid.
• the invention finally relates to the use of a sealed drum for the transport of a powdery chemical such as polytetrafluoroethylene.
• Figure 1A shows in perspective a container of a drum according to the invention.
• Figure 1 B shows a detail of the tray of Figure 1 A.
• Figure 2A shows in perspective a lid of the tray of Figure 1 A.
• Figure 2B shows a detail of the lid of Figure 2A.
• Figure 3A shows in elevation a closed shaft comprising a tray and a lid corresponding to the tray and the lid of Figures 1A and 2A.
• Figure 3B shows in section a portion of the barrel of Figure 3A.
• Figures 4A and 4B show two perspective views of a non-opening control edge of the barrel of Figure 3A.
• Figure 5 shows in perspective a partial view of a stack of two covers such as that of Figure 2A.
• Figure 6 shows in section a portion of the mold of the drum lid and the molded lid.
• this tray comprises a bottom 3 and a side wall 4 comprising a circumferential outer ring 5 with an upper surface of revolution 6, around the main axis 8, this surface 6 being flat for the tray of Figure 1 A.
• the tray also comprises an end edge 9, and a plurality of lugs 10 projecting from its external side wall 12.
• FIG. 1B More precisely shows the general shape of a lug 10, which extends circumferentially above the upper surface of revolution. 6, this lug comprising a beveled lower surface, adapted to cooperate with a beveled surface of a boss of the lid to obtain a clamping effect. At one end of this beveled surface, the lug comprises a hollow surface 16 adapted to be engaged by a prominent surface of the lid, to determine a reversible closure position of the barrel, as will be explained later.
• recesses 18 are disposed at the common level formed, the barrel being closed, by the upper surface of revolution 6 and a lower surface of revolution of the lid, in contact with each other . These recesses 18 make it possible, in connection with teeth on an area of the lid, to obtain a first non-reversible closure of the lid on the barrel, as will be explained hereinafter.
• the tray also comprises on the outer surface of the side wall 4 an arrow 20 to identify the position of the recesses 18, and that of a non-opening control edge of the barrel, arranged at a corresponding level of the lid when the barrel is closed for the first time.
• FIG. 2A showing a cover 22 associated with the tray of Figure 1A, comprising a portion 24 covering the tray, and a flange 26 covering the end edge 9 of the tray.
• the cover 22 also includes a plurality of bosses 28 projecting internally from an outer wall 30 of the flange 26.
• FIG. 2B shows in an enlarged and more precise manner an internal part of the collar, at the non-opening control edge 32.
• This control edge 32 comprises teeth 34 intended to engage, non-reversibly, the recesses 18 of the tray.
• the non-opening control edge 32 however comprises, on its periphery, slots 36, forming areas of weakness for tearing this non-opening control edge 32 along its periphery, to be able to clear the teeth 34 of the recesses 18 on the cover separating this control edge 32 from the rest of the flange 26, thus allowing a first opening of the barrel.
• FIG. 2B it is also possible to see in FIG. 2B the general shape of a boss 28 projecting internally from an outer wall 30 of the flange 26.
• This boss 28 extends circumferentially above the lower surface of revolution 38, this boss comprising a top surface 40 beveled, adapted to cooperate with a bevelled surface 14 of a lug 10 of the tray.
• the boss At one end of the bevelled surface 40 of the boss, the boss comprises a protruding surface 42, extending upwards, able to engage a corresponding hollow surface 16 of a lug of the tray to determine a reversible closing position of the barrel .
• the protruding surfaces 42 and hollow 16 are profiled gradually and gently, to allow a reversible closure.
• the closure of the drum takes place as follows, while considering FIGS. 1A, 1B, 2A, 2B:
• the lid is placed above the tray so that the lugs 10 of the tray are angularly offset (and not superposed). partially or totally) to the bosses 28 of the lid.
• the lid is then depressed so that the bosses 28 of the lid at least partially come to a level lower than the level of the lugs 10.
• FIG. 3A shows the closed shaft after its first closure.
• the non-opening control edge 32 detectable by means of an arrow 44 disposed on its outer surface, is then positioned opposite one of the arrows 20 disposed on the tray, showing that the position of first closure of the drum (more precisely, the rotational position of the lid) is correct.
• Figure 3B shows a section, slightly modified, of a portion of the shaft of Figure 3A, along the axis AA of this figure.
• FIG. 3B shows in particular an inner wall 45 and an outer wall 30 of the flange 26, as well as the upper surfaces of revolution 6 of the tank, and lower of revolution 38 of the lid, clamped against each other to form a zone sealing.
• the clamping is produced by the engagement of the boss 28 of the cover between the lug 10 of the tray and the outer circumferential ring 5.
• FIG 3B is modified in its upper part, in that the end edge 9 of the tray is shown in its initial position (without interaction with the lid) It can be seen that the upper part of the end edge 9 comprises a outer surface of diameter D and the cover flange comprises, on its inner surface, a docking area 46 with the end edge of the tray, of progressive diameter, the initial diameter corresponding to a closed position of the barrel is equal It will be understood that the delta value is not constant since the docking zone 46 has an evolutionary diameter, the delta value being dependent on the exact level considered.
• Each flange 26 comprises an external bearing surface 50 and an internal bearing surface 52, configured so that, during a stack of two identical covers, the outer bearing surface of the lid disposed in the lower position comes into contact with the internal bearing surface of the lid disposed in the upper position, so as to allow support during the stacking of the two covers which prevents their contact at the sealing zone disposed on the corresponding end edge of the tray to the docking area 46 of the collar.
• FIG. 6 shows in section a portion of the mold of the drum lid, and the corresponding portion of the molded lid.
• the sectional view corresponds to the level of a boss of the lid.
• This mold includes:
• an upper molding element 54 comprising a molding surface for molding, in particular, at least part of an external surface of the outer wall of the flange,
• a lower molding element 56 comprising a molding surface for molding at least part of an inner surface of the outer wall of the flange
• a movable molding core 58 comprising a lower molding surface of an upper surface of the boss, and radial removal means of this core in a housing 60 associated with the core 58, so that the radial withdrawal of each core in its housing allows the release of the lid by axial displacement, without blocking because of the bosses.
• the mold also comprises another lower molding element 62.
• the core 58 is moved radially outwardly (to the right in FIG. 6), forming a bottom surface forming a molding surface for the upper surface 40 of the boss 28, including the protruding surface 42 (see FIG. ).
• this core is moved radially inwards, for example by a jack not shown, so as to disengage the boss 28, and allow the release of the cover by axial translation upwards, after having removed, also by axial translation, the upper molding element 54.
• the sectional view of FIG. 6 does not represent all the elements of the mold.
• another movable molding core disposed on an outer portion of the upper molding element 54, can be used to directly mold certain radial slots 36 around the non-opening control edge 32 (see FIG. 2B). in this case, after molding, the other movable molding core is moved radially outwardly so as to allow axial translation of the upper molding element 54.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Closures For Containers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48856741

Family Applications (1)

Country Status (8)

Families Citing this family (15)

Family Cites Families (22)

• 2013
  • 2013-02-25 FR FR1351655A patent/FR3002522B1/fr not_active Expired - Fee Related
• 2014
  • 2014-02-25 US US14/767,639 patent/US10526114B2/en not_active Expired - Fee Related
  • 2014-02-25 WO PCT/FR2014/050408 patent/WO2014128428A1/fr active Application Filing
  • 2014-02-25 JP JP2015558538A patent/JP6434427B2/ja not_active Expired - Fee Related
  • 2014-02-25 RU RU2015137301A patent/RU2672680C2/ru active
  • 2014-02-25 EP EP14713186.6A patent/EP2958819A1/de not_active Withdrawn
  • 2014-02-25 CN CN201490000448.7U patent/CN205256941U/zh not_active Expired - Fee Related
  • 2014-02-25 KR KR1020157026154A patent/KR102010115B1/ko active IP Right Grant

Also Published As

Similar Documents

Legal Events