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WO2023166011A1 - Rouleau doseur et dispositif comprenant au moins un tel rouleau doseur - Google Patents

Rouleau doseur et dispositif comprenant au moins un tel rouleau doseur Download PDF

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Publication number
WO2023166011A1
WO2023166011A1 PCT/EP2023/055082 EP2023055082W WO2023166011A1 WO 2023166011 A1 WO2023166011 A1 WO 2023166011A1 EP 2023055082 W EP2023055082 W EP 2023055082W WO 2023166011 A1 WO2023166011 A1 WO 2023166011A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
metering
dosing
compressed air
elements
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.)
Ceased
Application number
PCT/EP2023/055082
Other languages
German (de)
English (en)
Inventor
Werner Runft
Thomas Brinz
Bernhard Wagner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Syntegon Technology GmbH
Original Assignee
Syntegon Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Syntegon Technology GmbH filed Critical Syntegon Technology GmbH
Priority to KR1020247027881A priority Critical patent/KR20240140109A/ko
Priority to CN202380024880.3A priority patent/CN118829851A/zh
Publication of WO2023166011A1 publication Critical patent/WO2023166011A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/10—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation
    • G01F11/12—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements
    • G01F11/20—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber rotates or oscillates
    • G01F11/24—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber rotates or oscillates for fluent solid material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/04—Methods of, or means for, filling the material into the containers or receptacles
    • B65B1/16—Methods of, or means for, filling the material into the containers or receptacles by pneumatic means, e.g. by suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/20—Reducing volume of filled material
    • B65B1/26—Reducing volume of filled material by pneumatic means, e.g. suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/30—Devices or methods for controlling or determining the quantity or quality or the material fed or filled
    • B65B1/36—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by volumetric devices or methods
    • B65B1/363—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by volumetric devices or methods with measuring pockets moving in an endless path
    • B65B1/366—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by volumetric devices or methods with measuring pockets moving in an endless path about a horizontal axis of symmetry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/42—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation
    • B65B43/50—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation using rotary tables or turrets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/42—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation
    • B65B43/54—Means for supporting containers or receptacles during the filling operation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/12—Cleaning arrangements; Filters
    • G01F15/125—Filters

Definitions

  • Metering roller and device comprising at least one such metering roller
  • the invention relates to the field of automatically operating devices for dosing powdery products with the aid of a so-called dosing roller.
  • the invention is particularly suitable for dosing small amounts of powder in the range, for example, from 0.3 mg to 50 mg.
  • This type of dosing roller is used, for example, for dosing pharmaceutical powders, in particular for inhalation.
  • Another application is the dosing of pure pharmaceutical active ingredients.
  • a device for metering powdered products is known, for example, from EP 3 608 233 B1.
  • the object of the present invention is therefore to further improve devices for dosing powdered product.
  • This object is achieved with the metering roller according to the features of the independent patent claims.
  • Further advantageous configurations of the dosing roller and a device for dosing with such a dosing roller are specified in the dependently formulated patent claims and in the description and in particular also in the description of the figures. It should be pointed out that a person skilled in the art can combine the individual features with one another in a technologically sensible manner and thus arrive at further configurations of the invention.
  • the invention relates to a dosing roller for filling a target container with a portion of a powdered product to be dosed, comprising a roller body with an outer roller surface and an interior space in which a compressed air supply is located, as well as dosing chambers for the dosed uptake and delivery of the powdery product, which each form connections between the roller outer surface and the interior, the compressed air supply being set up to generate either a negative pressure or an overpressure in the dosing chambers in order to inflate the powdery product to convey into the dosing chambers or to release from the dosing chambers, the dosing chambers being separated from the interior and the compressed air supply by filter elements permeable to compressed air, which are clamped between clamping elements and the planar contact surfaces of the roller body surrounding the dosing chambers.
  • the metering roller is a cylindrical body with a roller outer surface and a roller axis. During the dosing process, the dosing roller is rotated around its axis with one direction of rotation. Dosing chambers are each arranged evenly distributed in circumferential annular areas. There are preferably a number of ring-shaped areas along the axis, in each of which a number of dosing chambers are arranged. In this case, dosing chambers in different ring-shaped areas are each preferably arranged in alignment along the axis. In the embodiment variants shown below, also in the figures, four dosing chambers are arranged in an annular area. However, metering rollers with any deviating numbers of metering chambers are also included here, for example with two to ten metering chambers in each ring-shaped area.
  • the dosing roller conveys defined subsets from a product supply with the powdered product into a target container.
  • a pickup position and a delivery position denote locations relative to the metering roller.
  • the pick-up position is preferably arranged above the metering roller and the delivery position is arranged below the metering roller.
  • the target container is, for example, a capsule and the powdered product, for example a medicament, which is to be filled into the capsule.
  • the dosing roller can also be used for a wide variety of other powdered products and target containers.
  • the term "product supply” means any source of the powdered product at the pick-up position. This can be, for example, a funnel running towards the metering roller, which can be filled from above with the powdery product and whose outlet is connected to a metering chamber located at the receiving position. The outlet can be closed by the outer surface of the dosing roller if there is no dosing chamber in the receiving position, for example if the dosing roller was rotated further after a dosing chamber in the receiving position was filled with powdered product.
  • a roller body preferably forms a kind of basic structure of the metering roller.
  • the roller body is preferably a one-piece body made of metal, for example.
  • the roller body can, for example, be a cast part, which has optionally been post-processed using machining processes.
  • the roller body can also be manufactured using other suitable manufacturing processes.
  • An outer surface of the metering roller is preferably formed directly by the roller body.
  • the roller body has an interior space.
  • the basic shape of the roller body is therefore tubular, with the interior of the roller body not being designed, or at least not completely, with an inner surface which is symmetrical to the axis of the metering roller.
  • the metering chambers are designed in the manner of bores, which extend from the outer surface of the roller into the metering roller.
  • the holes extend to into the interior of the roller and the dosing chambers thus form passages from the outer surface of the roller into the interior.
  • the size or volume of the bores in the dosing chambers determines the dosing volume or the volume of the subsets to be dosed. All metering chambers of the metering roller are preferably of the same size.
  • the size or volume of the metering chambers depends on their diameter and the depth of the bores, with the depth describing the distance from the outer surface of the roller to a lower end of the metering chambers (preferably at a transition area between the metering chamber and the interior of the roller.
  • the filter element is preferably located at this transition area.
  • the filter element which is used in the metering roller, delimits the metering chamber at the bottom or delimits the metering chamber from the interior space or the compressed air supply in the interior space.
  • the filter element is preferably film-like, paper-like or also a textile fabric made of plastic, wire or the like. Solid filters made of plastic or metal can also be used as the filter element.
  • the filter element and in particular the permeability of the filter element is matched to the powdered product and in particular its particle size.
  • the permeability of the filter element is selected in such a way that particles of the powdery product are reliably retained by the filter element and no powdery product gets into the interior - but at the same time compressed air can flow through the filter element with an acceptable flow resistance, so that the compressed air supply generates an overpressure or a negative pressure can be generated in the dosing chambers.
  • a (continuous) filter element is preferably not provided for all metering chambers of the metering roller, but the filter element is subdivided for the various metering chambers of the metering roller.
  • a continuous strip of filter material can be used for all metering chambers arranged in a line along the axis of the metering roller, which strip is inserted in a groove (described in more detail below) in the interior.
  • compressed air supply refers here to components for subjecting the dosing chambers to overpressure or negative pressure, which are arranged in the interior of the dosing roller.
  • the compressed air supply includes, in particular, compressed air ducts in the interior of the metering roller.
  • the compressed air supply is preferably part of a compressed air supply system, which also includes components located outside the interior of the metering roller, which interact with the compressed air supply.
  • the compressed air supply system preferably has negative pressure generation and positive pressure generation.
  • the negative pressure generation acts preferably on dosing chambers that are in the receiving position and generates a negative pressure through the filter element, with which the powdered product is drawn into the dosing chamber and then also held in the dosing chamber during transport during the rotation of the dosing roller.
  • the compressed air supply system preferably has overpressure generation.
  • the generation of overpressure preferably acts on dosing chambers that are in the dispensing position.
  • the overpressure is transmitted through the filter element into the dosing chamber and conveys the powdered product out of the dosing chamber and into the target container.
  • the overpressure generation generates a kind of compressed air blast at the dispensing position on the dosing chamber for transferring the powder into a container.
  • the negative pressure provided by the negative pressure generation can also vary during the filling of the dosing chambers at the receiving position and/or during the transport of the partial quantities in the dosing chambers from the receiving position to the dispensing position during the rotation, in order to achieve a particularly advantageous filling of the dosing that is adapted to the respective situation - effect chamber/promotion of the subset.
  • the generation of negative pressure and the generation of positive pressure are preferably connected to the dosing chambers through channels that are described in more detail below.
  • a controller can be provided, which specifies in each case whether the generation of negative pressure or the generation of positive pressure acts on the respective dosing chamber.
  • vacuum and “overpressure” here each refer to an ambient pressure that acts on the metering roller from the outside.
  • a vacuum is a pressure below ambient pressure.
  • An overpressure is a pressure above the ambient pressure.
  • Precise dosing of the partial quantity is preferably carried out in that precisely a specified quantity of powdered product can be sucked into the dosing chambers or held in the dosing chambers by the negative pressure.
  • the precise dosing can also be supported by the fact that during filling or shortly after filling, stripping elements can strip off excess powdery product that protrudes beyond the dosing chamber.
  • the filter element thus forms (starting from the outer surface of the roller) a lower closure of the dosing chamber and a delimitation of the dosing chamber from the compressed air supply described.
  • the filter element is of great importance for the accuracy of the dosing because the filter element ultimately limits the depth or the height of the dosing chambers and thus also defines the volume of the dosing chambers.
  • planar contact surfaces are provided on the dosing roller.
  • “Flat” contact surfaces here mean contact surfaces that are flat in the technical sense (compared to the curvature of the outer surface of the metering roller). are.
  • the planar contact surfaces are produced, for example, with a tool which, because of its tool design, produces a planar surface.
  • This can be, for example, a rotating milling tool with a tool axis which is aligned perpendicularly to the contact surface, with the milling tool preferably having a flat end face.
  • the planar contact surface can ensure that the filter element inserted into the metering roller itself is also planar (i.e. runs in one plane) and in particular is not curved (e.g. is shaped to follow an inner cylindrical surface of the metering roller).
  • the filter element is braced between two flat surfaces. In this way, an increased uniformity of the bracing and, as a result, also an improved sealing can be achieved.
  • membrane effects of the filter element can be avoided when filling and/or emptying the dosing chamber.
  • membrane effect here means a deformation of the filter element under the influence of media (the powdered product and/or the compressed air) that cause a change in the volume of the dosing chamber.
  • the dosing roller preferably has clamping elements with which the filter elements are clamped on the planar contact surfaces.
  • the clamping elements in the area of the dosing chambers each also have a planar contact surface, so that a uniform clamping of the filter elements on the contact surfaces is possible by means of the clamping elements.
  • the interior of the roller body has a central area and grooves extending from the central area to the outer surface of the roller, with the dosing chambers each forming connections between a base of the grooves and the outer surface of the roller and the planar contact surfaces on the base of the grooves surrounding the dosing chambers .
  • the roller body described here differs from a roller tube and has a more complex shape in its interior with a central area from which grooves with a groove base (bottom) extend.
  • the base is preferably flat or planar.
  • the grooves are made, for example, from the inside (starting from the central area) in the roller body by spark erosion. The reason is preferably the flat contact surface.
  • the design of the roller body described here makes it possible to achieve high metering accuracy and at the same time to provide a very stable construction of the metering roller.
  • the depth of a dosing chamber must not be too great because very small diameters of dosing chambers are also difficult to implement or have other disadvantages (especially when filling/emptying the dosing chambers).
  • roller tubes that have been customary up to now have had to have very small wall thicknesses for very small dosing chambers, which impairs the stability of the roller tubes.
  • the rolling body described here is only partially thin-walled (in the region of the grooves or the base of the grooves) and otherwise relatively thick-walled. The roller body therefore has significantly increased stability compared to a roller tube.
  • a width of the grooves is preferably greater than a diameter of the dosing chambers, so that around the dosing chambers a respective area of the base forms the planar contact surface.
  • the dosing chambers preferably each extend from the center of the grooves.
  • grooves each form guides for the clamping elements.
  • the clamping elements preferably have a width that corresponds to the width of the grooves minus a fitting clearance, so that the clamping elements are guided radially in the grooves and can be moved outwards along the (radial) guide. This simplifies the assembly (in particular the positioning) of the clamping elements in the roller body. In addition, it is achieved that the clamping elements are guided evenly towards the filter elements. As a result, the tensioning of the filter elements is improved (in particular made more uniform).
  • a clamping mechanism is arranged in the interior space, which is set up to clamp filter elements with the clamping elements in the grooves.
  • the clamping mechanism is preferably set up to convert an axial clamping movement in the clamping mechanism or of components of the clamping mechanism into a radial outward movement of the clamping elements.
  • the tensioning mechanism can, for example, have conical sliding surfaces on the tensioning mechanism and on the tensioning elements that interact with one another. A reduction in movement preferably also takes place here. A larger axial clamping movement with a smaller force is converted into a small nere radial clamping movement of the clamping elements translated with a greater force.
  • the tensioning mechanism can also function pneumatically, for example by providing a deformable element in the interior. Such a deformable element expands when it is filled with compressed air and it pushes the clamping elements outwards.
  • clamping elements each contain at least one compressed air channel of the compressed air supply and each have a plurality of branch channels which each provide a compressed air-conducting connection of the compressed air channel to the dosing chambers.
  • the compressed air channels preferably extend in the direction of the axis of the metering roller along the clamping elements in the clamping elements.
  • the compressed air channels are preferably bores in a longitudinal direction through the clamping elements.
  • the branch channels branch off from the compressed air channels in each case in the radial direction of the metering roller and open into the metering chambers.
  • the branch channels are preferably formed concentrically to the respective dosing chambers.
  • the branch channels serve to transfer the pressure from the compressed air channels to the dosing chambers.
  • sealing elements can be clamped between the clamping elements and the planar contact surfaces together with the filter elements in such a way that an airtight connection from the branch channels to the dosing chambers is provided.
  • the filter elements are braced between the sealing elements and the planar contact surfaces.
  • the roller bodies with the planar contact surfaces and clamping elements are preferably made of a relatively rigid material, for example metal or a hard plastic. Such a material is not or only to a small extent deformed by the forces acting during bracing.
  • the sealing element is preferably flexible compared to the contact surfaces and the tensioning elements.
  • the sealing element is made, for example, from an elastomer (e.g. rubber, caoutchouc, etc.). An improved seal is achieved by an elastic deformation of the sealing element, which can in particular also compensate for manufacturing tolerances of the planar contact surfaces.
  • the sealing elements are preferably rotationally symmetrical parts which are preferably arranged in the metering roller concentrically to the metering chambers and the branch channels or their axes, but any other profile is also possible.
  • the sealing elements preferably do not have any curvature, which would be required for sealing elements adapted to the shape of the inner surface of a roller tube.
  • the sealing elements are preferably designed to interact with planar contact surfaces and preferably form sealing surfaces that lie in planes and are intended to rest against the filter element, the planar contact surfaces and/or the clamping elements.
  • the sealing elements are formed onto the clamping elements.
  • the sealing elements are integrally connected to the tensioning elements and, for example, vulcanized onto the tensioning elements.
  • the clamping elements with the sealing elements formed on them are preferably prepared components that can be inserted into grooves of the roller body. By molding the sealing elements onto the clamping elements, it is also possible in particular to achieve precise positioning of the sealing elements relative to the clamping elements. Sealing elements can also be attached to the clamping elements in any other way. For example, sealing elements can be clipped into structures provided for this purpose on the clamping elements.
  • a recess can in particular be an extension of the branch channel on the side oriented towards the dosing chambers, which forms a bearing surface for the sealing elements.
  • the sealing elements can preferably be formed in the recesses.
  • a device for filling a powdery product is also to be described here, having at least one dosing roller according to one of the preceding claims for filling the powdery product into the target container. Such a device is described below with reference to the figures.
  • FIG. 2 shows a schematic cross section through a metering roller according to the prior art
  • FIG. 3 shows schematically an enlarged detail from the cross section according to FIG. 2;
  • FIG. 5 schematically shows an enlarged detail from the cross section according to FIG. 4;
  • Fig. 6 a longitudinal section through a metering roller described.
  • Fig. 1 shows a device 23 for filling a powdery product, which has a metering roller 1 described.
  • the structure of the device 23 is only an example.
  • the metering roller 1 described can also be used in devices with a different structure.
  • the device 23 has a carousel 31 which is rotated with a carousel direction of rotation 36 and in this way guides capsule holders 38 with capsules 37 held therein through various stations 32 at which processing steps of the capsules 37 take place. Shown here as an example are a loading station 33, in which empty capsules 37 are inserted into a capsule holder 38, a filling station 34, at which the capsules 37 are filled with the powdered product 3, and a removal station 35, at which the filled capsules 37 are provided or removed .
  • At least one dosing roller 1 described is provided at the filling station 34, with which a powdered product 3 from a product supply 28 is filled into the capsules 37. Two different degrees of fineness of the powdered product 3 are shown here as an example.
  • the metering roller described is suitable for powdered products 3 with different degrees of fineness.
  • FIGS. 2, 5 and 6 show a metering roller 1 of the prior art in contrast to the metering roller 1 according to the invention described here. scribed metering roller 1 according to the invention is then explained in Figs. 4, 5 and 6 in more detail. First, the metering roller 1 of the prior art is described here, and based on this, the metering roller according to the present invention is then explained.
  • the metering roller 1 is formed from a roller tube 39 which has an outer roller surface 6 and in which there are metering chambers 9 distributed around the circumference, in which a metered subset 4 of the powdered product 3 can be received.
  • a plurality of metering chambers 9 are preferably arranged one behind the other along the axis 40 of the metering roller 1, which extends here into the plane of representation.
  • the metering roller 1 can be rotated with a roller direction of rotation 27 in order to convey the subsets 4 of the powdery product 3 located in the metering chambers 9 .
  • a product supply 28 of the powdered product 3 which is designed here as a type of funnel, which feeds the powdered product 3 to the metering chamber 9 located in the receiving position 44.
  • a dosing chamber 9 is arranged directly below the product store 28 so that the dosing chamber 9 can be filled with the powdered product 3 from the product store 28 .
  • This position on the metering roller 1 is referred to here as the pick-up position 44 .
  • a compressed air supply 8 with which it is possible to pressurize the metering chambers 9 with compressed air, with an overpressure or a negative pressure being able to be provided depending on the situation.
  • a row of dosing chambers 9 arranged one behind the other along the axis 40 is connected to the compressed air supply 8 via a compressed air duct 17 .
  • Branch channels 18 branch off from the compressed air channel 17 to the dosing chambers 9 , which connect the compressed air channel 17 to the dosing chambers 9 in each case. However, the branch channels 18 and the compressed air supply 8 are each separated from the dosing chambers 9 by a filter element 10 .
  • the filter element 10 is permeable to compressed air, but not to the powdered product.
  • the filter element 10 extends along an inner surface 41 of the metering roller 1 or the roller tube 39.
  • the filter element 10 is braced on the inner surface 41 at each connection point between a dosing chamber 9 and a branch channel 18 in such a way that a compressed air-tight connection between the compressed air supply 8 and the dosing chamber 9 exists.
  • a compressed-air-tight connection means here that compressed air which is intended to flow from the branch channel 18 into the metering chamber 9 also passes completely through the filter element 10 into the metering chamber 9 and does not unintentionally pass into the interior 7 of the metering roller 1.
  • a sealing element 19 is arranged between the filter element 10 and a component with the compressed air channel 17 and the branch channels 18 for this fluid-tight bracing.
  • the component with the compressed air channel 17 is designed as a clamping element 11, which can be pressed outwards with a clamping mechanism 16 (not shown in detail here).
  • the filter element 10 is braced between the sealing element 19 and the inner surface 41 of the roller tube 39 of the roller.
  • the sealing element 19 is an annular sealing element 19 which is arranged as a continuation of the branch channel 18 .
  • the clamping element 11 presses on the sealing element 19 .
  • the clamping element 11 also provides the compressed air channel 17 and the branch channels 18 .
  • the dosing chamber 9 located at the top in FIG. 2 is connected to the product supply 28 .
  • a vacuum generator 24 is connected to the compressed air channel 17 that is connected to this dosing chamber 9 .
  • a portion of the powdered product 3 is drawn from the product supply 28 into the dosing chamber 9 . Due to the filter element 10, the powdered product 3 stops at a lower end of the dosing chamber 9 and does not get into the compressed air supply (the branch duct 18, the compressed air duct 19, etc.).
  • the metering roller 1 now rotates in the designated roller direction of rotation 27 until the respective subset 4 of the powdered product 3 is in the lower position.
  • This lower position is referred to as delivery position 45 here.
  • an overpressure generation 25 acts on the dosing chamber 9.
  • the overpressure conveys the subset 4 of the powdered product 3 out of the dosing chamber 9 into a target container 2.
  • controller 26 which controls the described components (vacuum generation 24, overpressure generation 25, direction of rotation 27 of the rollers, etc.). If necessary, the controller 26 can also be set up mechanically/automatically or electronically, pneumatically or in any other way.
  • the inner surface 41 of the roller tube is also curved in the area of the dosing chamber 9 .
  • the filter element 10 and the sealing element 19 follow this curvature.
  • the surface of the clamping element 11 lying against the sealing element 19 has a curvature adapted to the inner surface 41 .
  • This curvature makes sealing with the sealing element 19 more difficult.
  • the shape of the sealing element 19 is adapted to the shape of the curvature.
  • Such an adapted sealing element 19 has a specified alignment that must be observed when installing such a sealing element 19 . Overall, it is expensive to achieve the desired sealing effect in this embodiment.
  • the powdered product 3 also travels via the dosing chambers 9 from a product store 28 in a receiving position 44 to the delivery position 45, in which the subsets 4 of the powdered product 3 are delivered to a target container 2 .
  • the dosing of the subsets 4 can be supported by a stripping off of surplus powdery product 3 by means of a stripping element 46 .
  • the metering roller 1 according to this embodiment variant has a roller body 5 which, compared to the roller tube 39, has a more complex shape, especially in the interior 7, which takes on more functions within the metering roller 1 than the roller tube 39 in the embodiment variant according to FIG the differences between the prior art metering roller of Figures 2 and 3 and the metering roller of Figures 4, 5 and 6 will be discussed.
  • the dosing roller according to FIGS. 4, 5 and 6 also has the dosing chambers 9, which are accessible from the roller outer surface 6, for receiving defined partial quantities 4 extending Has grooves 14.
  • the central area 13 and the grooves 14 together form a cross section of the inner space 7 which extends along the axis 40 of the metering roller 1 .
  • the compressed air supply 8 is constructed very similarly in the variant described above according to FIGS. 2 and 3 and the variant described here according to FIGS. 4, 5 and 6 with the difference that the clamping elements 11 (which contain the compressed air channels 17 and the branch channels 18 ) are each guided within the grooves 14 here. Otherwise, reference is made here to the explanation for FIGS.
  • the grooves of the roller body 5 each form a guide for guiding the clamping elements 11 .
  • the clamping elements 11 can be guided in the radial direction in the grooves 14 when the clamping mechanism 16 is actuated in order to clamp the clamping elements 11 outwards.
  • a vacuum generator 24 is set up to suck the powdery product 3 into a dosing chamber 9 at a specific position (here in the dosing chamber 9 arranged at the top) by means of a vacuum.
  • the negative pressure generator 24 is also set up to maintain a negative pressure in order to keep the powdered product 3 in the dosing chamber 9 . This happens both in that the negative pressure is transmitted to the metering chamber 9 with the compressed air supply 8 .
  • An overpressure generator 25 is set up to convey the powdered product 3 out of a dosing chamber 9 at a specific position (here the dosing chamber 9 arranged below). This takes place in that the excess pressure is transmitted to the dosing chamber 9 with the compressed air supply 8 .
  • the compressed air supply 8, the negative pressure generator 24 and the positive pressure generator 25 preferably together form a compressed air supply system.
  • Fig. 5 shows an section of the illustration in FIG. 4.
  • the groove 14, which has a base 15, can be seen first.
  • the base 15 of the groove 14 provides a planar contact surface 12 for the filter element 10 .
  • the planar contact surface 12 is flat. It can, for example, have been produced with a milling head, with which the groove 14 with the base 15 was milled into the roller body 5 .
  • Another possibility for producing grooves 14 is spark erosion.
  • the clamping element 11 provides the compressed air channel 17 with the branch channels 18 .
  • the sealing element 19 is preferably inserted into a recess 22 provided for this purpose on the clamping element 11 .
  • the recess 22 can, for example, form a peripheral shoulder on the branch channel 18, in which the sealing element 19 is inserted.
  • the recess 22 ensures an exact position of the sealing element 19 relative to the clamping element 11 .
  • the filter element 10 is braced between the sealing element 19 and the planar contact surface 12 on the base 15 of the groove 14 .
  • Circumferential sealing surfaces 20 run around the dosing chamber 9 or around the connection from the dosing chamber 9 to the branch channel 18 .
  • the sealing surfaces 20 form sealing surface regions 21 .
  • On the sealing surfaces 20 or the sealing surface areas 21, the filter element 10 and the planar contact surface 12 or the filter element 10 and the sealing element 19 are pressed against one another with a uniform sealing force. A particularly good sealing effect can be achieved in this way.
  • the dosing chamber 9 , the filter element 10 , the sealing surface areas 21 , the sealing element 19 and the branch channel 18 are preferably each formed rotationally symmetrically around a dosing chamber axis 42 of the respective dosing chamber 9 .
  • All elements are preferably designed to be flat.
  • the filter element 10 is not curved in the position between the planar contact surface 12 and the sealing element 19, but is also flat.
  • a small deformation of the filter element 10 under the influence of the acting pressure and under the influence of the powdered product 3 can be achieved.
  • the membrane effect 29 explained with reference to FIG. 3 can be completely or at least partially avoided.
  • FIGS. show a longitudinal section through the metering roller 1 according to the invention, shown in cross section in FIGS. which are each cut here. It can first be seen that the dosing chambers 9 are arranged one behind the other along the axis 40 in a plurality of ring-shaped areas 43, with each ring-shaped area 43 being assigned to a dosing station that takes the powdery product 3 from a product supply 28 (not shown here) into a target container 2 promotes.
  • the clamping elements 11 are in each case located in the grooves 14 .
  • the clamping elements 11 are clamped in the grooves 14 with the clamping mechanism 16 .
  • the clamping mechanism 16 here has conical sliding surfaces 30, with which an axial clamping movement is converted into a radially acting clamping movement, which pushes the clamping elements 11 outwards.
  • the compressed air channels 17 with the branch channels 18 towards the individual dosing chambers 9 are provided in the clamping elements 11 .
  • the sealing elements 19 provided at the connection from the branch channels 18 to the dosing chambers 9 and the filter element 10 can also be seen.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Basic Packing Technique (AREA)

Abstract

Rouleau doseur (1) destiné à remplir un récipient cible (2) avec une partie (4) d'un produit en poudre (3) à doser, comprenant un corps de rouleau (5) avec une surface extérieure de rouleau (6) et un intérieur (7) dans lequel est située une alimentation en air comprimé (8), et des chambres de dosage (9) pour la réception et la distribution dosées du produit en poudre (3), lesquelles chambres de dosage (9) forment chacune des connexions entre la surface extérieure de rouleau (6) et l'intérieur (7), l'alimentation en air comprimé (8) étant conçue pour générer une sous-pression ou une surpression dans les chambres de dosage (9) de façon à transporter le produit en poudre (3) dans les chambres de dosage (9) ou le distribuer à partir des chambres de dosage (9), et les chambres de dosage (9) étant délimitées depuis l'intérieur (7) et depuis l'alimentation en air comprimé (8) par des éléments filtrants (10) qui sont perméables à l'air comprimé et soutenus entre des éléments de serrage (11) et des surfaces planes d'appui (12) du corps du rouleau (5) qui entourent les chambres de dosage (9).
PCT/EP2023/055082 2022-03-02 2023-03-01 Rouleau doseur et dispositif comprenant au moins un tel rouleau doseur Ceased WO2023166011A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020247027881A KR20240140109A (ko) 2022-03-02 2023-03-01 계량 롤러 및 적어도 하나의 계량 롤러를 포함하는 장치
CN202380024880.3A CN118829851A (zh) 2022-03-02 2023-03-01 计量辊筒以及包括至少一个这样的计量辊筒的装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022104871.3A DE102022104871A1 (de) 2022-03-02 2022-03-02 Dosierwalze und Vorrichtung umfassend mindestens eine derartige Dosierwalze
DE102022104871.3 2022-03-02

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WO2023166011A1 true WO2023166011A1 (fr) 2023-09-07

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PCT/EP2023/055082 Ceased WO2023166011A1 (fr) 2022-03-02 2023-03-01 Rouleau doseur et dispositif comprenant au moins un tel rouleau doseur

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KR (1) KR20240140109A (fr)
CN (1) CN118829851A (fr)
DE (1) DE102022104871A1 (fr)
WO (1) WO2023166011A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4650726A1 (fr) * 2024-05-16 2025-11-19 Harro Höfliger Verpackungsmaschinen GmbH Doseur à rouleaux

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3446404A (en) * 1967-06-20 1969-05-27 Maharaj K Mehta Encapsulation of powders
DE20118915U1 (de) * 2001-11-20 2003-03-27 Robert Bosch Gmbh, 70469 Stuttgart Vorrichtung zum Dosieren und Abgeben von pulverförmigem Füllgut in Behälter
EP1437299A1 (fr) * 1996-04-26 2004-07-14 Nektar Therapeutics Appareil et procédé pour remplir un récipient avec de la poudre
US20050023297A1 (en) * 2003-06-12 2005-02-03 Harro Hofliger Verpackungsmaschinen Gmbh Filter piston apparatus for dispensing pulverulent bulk material
US20150217879A1 (en) * 2014-02-01 2015-08-06 Harro Höfliger Verpackungsmaschinen GmbH Metering device for powder and method for metering powder
EP3608233B1 (fr) 2018-08-08 2020-10-21 Harro Höfliger Verpackungsmaschinen GmbH Cylindre doseur

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Publication number Priority date Publication date Assignee Title
US4709837A (en) 1984-05-01 1987-12-01 Merck & Co., Inc. Filter assembly for dry powder filling machine
SE0400282D0 (sv) 2004-02-09 2004-02-09 Microdrug Ag Machine for volumetric filing of powders

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3446404A (en) * 1967-06-20 1969-05-27 Maharaj K Mehta Encapsulation of powders
EP1437299A1 (fr) * 1996-04-26 2004-07-14 Nektar Therapeutics Appareil et procédé pour remplir un récipient avec de la poudre
DE20118915U1 (de) * 2001-11-20 2003-03-27 Robert Bosch Gmbh, 70469 Stuttgart Vorrichtung zum Dosieren und Abgeben von pulverförmigem Füllgut in Behälter
US20050023297A1 (en) * 2003-06-12 2005-02-03 Harro Hofliger Verpackungsmaschinen Gmbh Filter piston apparatus for dispensing pulverulent bulk material
US20150217879A1 (en) * 2014-02-01 2015-08-06 Harro Höfliger Verpackungsmaschinen GmbH Metering device for powder and method for metering powder
EP3608233B1 (fr) 2018-08-08 2020-10-21 Harro Höfliger Verpackungsmaschinen GmbH Cylindre doseur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4650726A1 (fr) * 2024-05-16 2025-11-19 Harro Höfliger Verpackungsmaschinen GmbH Doseur à rouleaux

Also Published As

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DE102022104871A1 (de) 2023-09-07
CN118829851A (zh) 2024-10-22
KR20240140109A (ko) 2024-09-24

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