EP4188612A1 - Réservoir de fluide comportant un sac intérieur pouvant éventuellement être inséré - Google Patents

Réservoir de fluide comportant un sac intérieur pouvant éventuellement être inséré

Info

Publication number
EP4188612A1
EP4188612A1 EP21752025.3A EP21752025A EP4188612A1 EP 4188612 A1 EP4188612 A1 EP 4188612A1 EP 21752025 A EP21752025 A EP 21752025A EP 4188612 A1 EP4188612 A1 EP 4188612A1
Authority
EP
European Patent Office
Prior art keywords
inner bag
material container
cup
arrangement
gravity
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
Application number
EP21752025.3A
Other languages
German (de)
English (en)
Inventor
Peter Dettlaff
Albrecht Kruse
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.)
SATA GmbH and Co KG
Original Assignee
SATA GmbH and Co KG
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 SATA GmbH and Co KG filed Critical SATA GmbH and Co KG
Publication of EP4188612A1 publication Critical patent/EP4188612A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2478—Gun with a container which, in normal use, is located above the gun
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • B05B7/2408—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle characterised by the container or its attachment means to the spray apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2481—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device with a flexible container for liquid or other fluent material

Definitions

  • the invention relates to a flow cup for a spray gun, which has a material outlet which is designed for direct and/or indirect connection to the spray gun, the flow cup having a material container and a lid arrangement that releasably closes the material container, with an inner bag being arranged in the material container and having Coating material can be filled, the filled in the inner bag coating material can be supplied via the material outlet of the spray gun.
  • the invention relates to an inner bag for a gravity cup and a gravity cup arrangement with a gravity cup and an inner bag.
  • a flow cup as described above is known, for example, from EP 2 027 931 B1, which has a paint container and a lid that can be placed on the paint container.
  • the gravity cup includes a connection part for connecting the gravity cup to a spray gun.
  • EP 2 027 931 B1 mentions a variant in which the flow cup is equipped with a liner (flexible inner bag).
  • the font describes versions without a liner and e.g. B. with a ventilation valve in the bottom of the paint container.
  • Both gravity cups that are designed to be used with an inner bag and gravity cups that are designed to be used without an inner bag have their specific advantages depending on the coating task and properties of the coating material.
  • a company e.g. A paint shop, for example, must decide which flow cup system (with or without an inner bag) to choose, taking into account the spectrum of its coating tasks and the respective preferences of the operational users.
  • the company can procure both gravity cup systems. However, he then has to accept double procurement, double stockpiling, etc.
  • the object of the invention is to provide a flow cup or flow cup arrangement that can be used flexibly.
  • the gravity cup according to the invention is characterized in that it can be filled with coating material with or without the inner bag and can be used with the coating material being released via the material outlet to the spray gun.
  • the invention a company no longer has to decide in advance on one type of flow cup or procure and stock both types.
  • the end user can decide whether to use the flow cup according to the invention with or without an inner bag.
  • This is made possible in particular by the flow cup according to the invention being fully functional without an inner bag.
  • It can be filled with coating material, especially paint materials such as top coat, clear coat, filler, etc.
  • coating material especially paint materials such as top coat, clear coat, filler, etc.
  • escape of the coating material from the flow cup is avoided, i. H. the flow cup and in particular the wall of the material container is liquid-tight and solvent-resistant.
  • the gravity cup has a ventilation device that includes at least one ventilation opening, via which, when using the gravity cup with and without an inner bag, pressure can be equalized for the interior of the material container when coating material is poured out of the gravity cup via the material outlet.
  • the ventilation device can prevent liquid from escaping from the interior of the device, at least in one operating state Material container can escape through the ventilation opening.
  • the gravity cup can be equipped with an aeration device that permanently prevents fluid (gas and liquid) from escaping from the gravity cup, but at the same time fluid can enter due to the formation of a vacuum inside the gravity cup.
  • the ventilation device z. B. a beak valve, diaphragm valve, etc. on.
  • the gravity cup can be equipped with an aeration device that permanently prevents liquid from escaping from the gravity cup, but at the same time allows gas to enter.
  • an aeration device that permanently prevents liquid from escaping from the gravity cup, but at the same time allows gas to enter. This can preferably be realized by using a semi-permeable membrane.
  • the ventilation device is a manually operable ventilation device or ventilation valve.
  • the ventilation valve preferably has a closure element which can be moved by the user between an open position and a closed position.
  • This type of ventilation valve is characterized by a high level of functional reliability.
  • the ventilation valve can be designed as a rotary, tilting, sliding, rotating valve, etc.
  • An embodiment of the flow cup with an aeration device in the form of a plug-in valve which is characterized by a particularly high level of functional reliability and a robust design, is particularly preferred.
  • the ventilation device in particular the plug-in valve, is particularly advantageous in that it is designed in such a way that a closure element, e.g. B. in the form of a cap, can be assembled or disassembled by the user as needed.
  • a closure element e.g. B. in the form of a cap
  • the closure element is not required. If the gravity cup is delivered with a preassembled closure element, it can be dismantled before using the gravity cup with inner bag (e.g. if the gravity cup is configured as an upside-down gravity cup with a ventilation device on the container side). If the Gravity cup is delivered without a pre-assembled closure element, the closure element may not be able to be assembled at all. In both cases, any contamination or other impairment of the closure element is avoided when using the gravity cup with inner bag.
  • the closure element can later be used with the gravity cup that has already been used without an inner bag or with another gravity cup.
  • the ventilation device is preferably arranged on the cover arrangement of the flow cup, with the material outlet being provided, for example, opposite on the bottom of the material container.
  • the ventilation device is provided on the material container and in particular on the bottom of the material container.
  • the cover arrangement is provided with the material outlet.
  • the ventilation device and the material outlet are arranged on the cover arrangement.
  • the detachable connection between the material container and the lid arrangement is designed in such a way that when the flow cup with inner bag is used, the inner bag can be clamped between the material container and the lid arrangement.
  • the detachable connection between the material container and the lid arrangement is designed in such a way that the connection is fluid-tight when the flow cup is used with or without an inner bag. This reliably prevents the coating material from escaping between the material container and the lid arrangement when working with the flow cup, regardless of whether an inner bag is used.
  • the fluid density allows Formation of the connection also a longer storage of coating material in the flow cup, without this z. B. dries up or is contaminated by penetrating substances.
  • connection between the material container and the lid arrangement is designed in such a way that the connection is fluid-tight both with an inner bag clamped between the material container and the lid arrangement and without the inner bag with direct contact between the material container and the lid arrangement.
  • no replacement component such as e.g. B. an annular sealing member can be used instead of the inner bag.
  • the detachable connection between the material container and the lid arrangement is (additionally) designed in such a way that the lid arrangement is fastened to the material container with sufficient holding force when the flow cup is used, with and without the inner bag.
  • a sufficient holding force is considered to be, for example, a holding force that holds the lid arrangement on the material container when an overpressure of at least up to 0.2 bar is present inside the gravity cup. Such overpressure can occur when coating material is stored in the closed gravity cup due to temperature fluctuations and solvent vapors.
  • the holding force should be large enough to prevent the connection from being released by pivoting or tilting the flow cup filled with coating material, which is connected to the spray gun either only via the material container or via the cover arrangement.
  • the fluid-tight seal between the lid assembly and the material container is achieved by an axial and/or radial seal when using the gravity cup with an inner bag and by an axial and/or radial seal when using the gravity cup without an inner bag.
  • an axial and/or radial seal when using the gravity cup with an inner bag
  • an axial and/or radial seal when using the gravity cup without an inner bag.
  • various designs are conceivable and technically feasible.
  • a radial seal can be provided and without an inner bag an axial seal.
  • the connection can be designed in such a way that a radial/radial configuration, an axial/radial configuration or an axial/axial configuration results.
  • connection is designed such that the fluid-tight seal results from an axial and radial seal when using the flow cup with an inner bag and from an axial and radial seal when using the flow cup without an inner bag.
  • axial means a direction along the assembly axis along which the lid assembly and the material container are connected to each other
  • radial means a radial orientation with respect to this assembly axis.
  • the assembly axis coincides with the longitudinal axis of the material container and—if it is designed to be rotationally symmetrical—with its axis of rotation.
  • the lid arrangement is designed as a screw lid
  • the screw axis represents the assembly axis.
  • the assembly axis represents the axis along which the snap-on or plug-in lid is snapped or pushed onto the material container.
  • An axial gap is preferably to be understood as meaning a gap between opposing walls in the axial direction and a radial gap as meaning a gap between opposing walls in the radial direction.
  • the full functional capability of the connection of the lid arrangement with the material container, with and without an inner bag is achieved by a two-position solution.
  • the connection between the lid assembly and material container is designed such that the lid assembly and the material container are fluid-tightly connected to each other in a first position when the inner bag between is clamped between them, and are fluid-tightly connected to one another in a second position when no inner bag is clamped between them.
  • the two positions differ from one another, for example, by the axial position and/or the rotational position of the cover arrangement and material container.
  • the two-position solution is preferably designed in such a way that in the first position, a receiving space for the inner bag is formed between at least one sealing surface on the lid arrangement and a sealing surface on the material container, which in the second position lie directly against one another in a sealing manner, with the receiving space being formed in such a way it is designed that the inner bag arranged therein serves as a sealing element between the two sealing surfaces.
  • the receiving space is preferably designed as a radial annular gap and/or as an axial annular gap.
  • connection between the lid arrangement and material container is designed in such a way that when using the flow cup with an inner bag, the inner bag is clamped in a radial annular gap between the lid arrangement and the screw lid.
  • the lid arrangement and the material container are in direct radial contact with one another in the area of the radial annular gap.
  • the lid arrangement and the material container when using the flow cup without an inner bag, can be spaced apart from one another in the area of the radial annular gap.
  • the seal is then made at a different point (axially and/or radially).
  • a variant is particularly preferred in which the lid arrangement and the material container are already in direct contact with one another in the first position in the area of the radial annular gap, even if no inner bag is used. In this way, during the transition from the first position to the second position, there is a radial prestress, in particular a spreading of the material container achieved.
  • connection between the lid arrangement and the material container is designed in such a way that when using the flow cup with an inner bag, the inner bag is clamped in an axial annular gap between the lid arrangement and the screw lid.
  • the lid arrangement and the material container are in direct axial contact with one another in the area of the axial annular gap.
  • the lid arrangement and the material container when using the flow cup without an inner bag, can be spaced apart from one another in the area of the axial annular gap.
  • the sealing takes place at a different point (axially and/or radially) in this exemplary embodiment.
  • the inner bag is preferably axially clamped at a peripheral edge of the inner bag, which is formed on an open end face of the inner bag.
  • An optionally provided clamping of the inner bag in the radial direction preferably takes place below the edge on a peripheral wall of the inner bag, which extends away from the edge.
  • the cover arrangement is provided with a receiving groove for an edge area of the material container, with a central area of the cover arrangement adjoining the receiving groove.
  • the edge area of the material container connected to the lid arrangement (possibly including a part of the inner bag) is stably enclosed on the inside and outside.
  • the seal preferably takes place with and without an inner bag insert between the lid arrangement and the material container at the base of the receiving groove (axial sealing) and/or on the outside of the inner leg of the receiving groove (radial sealing).
  • a central area of the cover arrangement is designed as a continuation of at least a predominant part of an inner leg of the receiving groove.
  • the design of the inner leg brings with it considerable manufacturing advantages. Components of flow cups are advantageously produced from plastic by an injection molding process.
  • the variant of the invention is characterized in that the flow of liquid plastic is not divided at the transition from the central area of the cover arrangement to the receiving groove when the injection molding tool is being filled.
  • the area that is particularly sensitive to the functional reliability of the cover arrangement, namely the receiving groove can be formed by a uniform (unbranched) flow of liquid plastic coming from the central area. This ensures that the injection molding tool is quickly, evenly and completely filled in this particularly critical edge area of the cover arrangement.
  • the cycle times and also the wall thicknesses of the cover arrangement can be reduced without functional losses, which in turn leads to overall cost and material savings.
  • the variant of the invention leads to an increase in functional reliability or allows a reduction in wall thickness and thus material savings. Since the inner leg of the receiving groove is not designed to be free-standing, but rather its end is connected to the central area of the cover arrangement, the inner leg is supported or stiffened by the central area, which in turn allows the wall thickness to be reduced while maintaining or even increasing rigidity.
  • the central area does not have to be attached to the end of the inner leg (even if this is particularly preferred).
  • a major part of the inner leg, z. B. more than 50%, preferably more than 75%, more preferably 95% of the total length of the inner leg (distance from the bottom of the groove io to the outer edge of the inner leg) is designed as a continuation of the central area. i.e. conversely, that less than 50%, preferably less than 25%, more preferably 5% of the total length of the inner leg is designed as a free-standing or protruding collar, rib, bead, lip, etc.
  • the central region of the cover arrangement borders the receiving groove with a ring section which extends at least almost perpendicularly to the receiving groove. This constructive measure reinforces the explained supporting effect of the inner leg through the central area.
  • the at least almost vertical ring section is followed by a ring section of the central area, which runs at least almost parallel to the inner leg in such a way that another groove is formed, but which is open in the opposite direction of the receiving groove.
  • the further groove forms a compensating ring groove, the dimensioning of which allows the desired support or rigidity of the inner leg to be defined.
  • the connection between the lid arrangement and the material container can be designed as a snap or snap-in connection.
  • it can be used with and without a clamped-in inner bag in that the lid arrangement can be fixed in two axial locking positions on the material container. In the first locking position, the distance between the lid arrangement and the material container is large enough for the inner bag to be clamped at least axially between them. In the second position (for use without an inner bag), the lid arrangement and the material container are, for example, directly in contact with one another.
  • a connection can be designed in a surprisingly simple and robust manner that is fluid-tight both with and without a clamped inner bag, in that the connection between the lid arrangement and the material container is designed as a screw connection, in particular as a multi-threaded screw connection.
  • the distance between the lid arrangement and the material container is so large that the inner bag can be clamped at least axially between them.
  • the lid arrangement and the material container are in direct contact with one another, for example.
  • An inner bag for a flow cup and its manufacturing method are also considered to be independently inventive, the inner bag having a peripheral edge on one open end, from which a peripheral wall leads away, which is preferably closed on the opposite end or has an outlet extension.
  • the edge has a wall thickness that is a multiple of the wall thickness of the peripheral wall.
  • the wall thickness of the rim is preferably 0.4 mm to 0.7 mm, in particular approximately 0.5 mm, and the wall thickness of the peripheral wall is 0.1 mm to 0.3 mm, in particular approximately 0.2 mm.
  • the rim of the inner bag may be provided with one or more beads, lips, ribs, etc. to improve the seal when clamped between the lid assembly and the material container. It can also have one or more positioning depressions and/or be shaped in the shape of an angle profile.
  • the inner bag is rotationally symmetrical to a longitudinal axis that extends along the peripheral wall. It preferably has a circular cross section. However, square, other polygonal, elliptical, etc. cross-sectional shapes are also conceivable and technically feasible.
  • the inner bag is preferably a flexibly collapsible inner bag. This is particularly important in connection with a gravity cup that is used as an upside-down gravity cup (material outlet on the Lid arrangement) with container-side ventilation device is an advantage since the inner bag has to contract when used in such a flow cup when coating material escapes.
  • the inner bag preferably has sufficient inherent rigidity to nevertheless remain stable, i. H. collapsing or buckling without the influence of external forces.
  • the inner bag is made of a fluid-tight, in particular solvent-resistant material, preferably plastic.
  • the inner bag is a mass product and is therefore manufactured in a deep-drawing process in the case of a particularly preferred embodiment.
  • the inner bag can be made in a blow molding process, in an injection molding process, e.g. B. with a hose system, by forming a (plastic) film under heating and pressure, etc. are produced.
  • the inner bag is provided with at least one fold line, along which the inner bag preferably buckles when there is a negative pressure inside the inner bag or coating material escaping from its inside. Thanks to the crease line, the vacuum that is required for the inner bag to contract is reduced.
  • the crease line causes the inner bag to fold together in such a way that after folding or as much coating material as possible has flowed out of the inner bag, a smaller residual volume, e.g. B. between folds of the inner bag, remains in the inner bag.
  • the inner bag is particularly preferably provided with at least one fold line which is formed by shaping and/or weakening the bag wall along the fold line results.
  • the formation of the fold line or several fold lines can, for. B. immediately during or after the primary shaping or molding of the inner bag.
  • the mold into which the inner bag is drawn or pressed can be provided with a corresponding counter-mould to form at least one fold line.
  • the inner bag is initially formed without a crease line and is then provided with at least one crease line in a subsequent process step (preferably without reclamping or the like).
  • the inner bag (possibly heated above the forming temperature of the plastic) can be pressurized, for example, by means of compressed air (which emerges from slots in the deep-drawing mold) or by means of thermal action (generated by heating wires, laser radiation, etc.).
  • the buckling line or several buckling lines can be introduced by changing the material (thermal, mechanical, chemical). For example, the wall thickness of the inner bag can be reduced along the fold line.
  • the buckling line or multiple buckling lines can also be introduced by reshaping. Furthermore, it is conceivable that the fold line(s) result from areas of the inner bag with different materials (composite inner bag).
  • the inner bag is preferably provided with at least one folding line which is closed in the form of a ring or runs in a spiral shape on the peripheral wall of the inner bag.
  • the inner bag is provided with a plurality of annularly closed folding lines which are at equal distances from one another or which increase or decrease in the longitudinal direction of the inner bag have distances.
  • a bellows-shaped or accordion-like inner bag preferably results.
  • the inner bag is provided with crossing fold lines.
  • a variant of the inner bag is preferred, in which the inner bag is provided with a diamond-shaped fold line pattern in the manner of a tubular lantern.
  • a variant of the inner bag according to the invention which is closed with a smooth bottom opposite the open end face or is provided with a funnel-like outlet extension, has proven itself in practice.
  • a gravity cup arrangement which comprises a gravity cup according to one of the exemplary embodiments explained above and below and an inner bag which can optionally be replaced therein according to one of the exemplary embodiments explained above and below.
  • the gravity cup can also be used without an exchangeable element for the inner bag when used without an inner bag.
  • the open cup rim of the material container and the portion of the lid assembly that interacts therewith is tapered, with the thickness of the rim of the inner bag, the thickness of the peripheral wall of the inner bag and the taper of the open cup rim of the material container and the taper of the portion that interacts therewith of the lid arrangement are matched to one another in such a way that when used with the inner bag, there is a sufficient axial and radial annular gap to accommodate the inner bag between the lid arrangement and the material container, as well as a fluid-tight seal, and still a fluid-tight seal without an inner bag forms between the lid assembly and the material container.
  • the inner bag in particular the upper open edge area of the inner bag, is preferably designed in such a way that the inner bag remains in the material container when the flow cup is opened, i.e. it is not pulled out of the material container with the lid arrangement. This ensures that the inner bag in the material container can be easily refilled.
  • the inner bag in particular the upper open edge area of the inner bag, is designed such that the inner bag gets caught or adheres to the cover arrangement when the cover arrangement is removed from the material container and is removed from the material container. In this way, storage of the remaining material in the inner bag closed with the lid arrangement is made possible without the material container having to be used.
  • a flow cup arrangement which comprises a replacement element, in particular a ring-shaped sealing element, which can be clamped between the lid arrangement and material container instead of the inner bag in order to use the flow cup without an inner bag.
  • Fig. 1 is a sectional view of a spray gun with a
  • FIG. 2 shows a side view of an optionally replaceable inner bag for the flow cup according to FIG. 1,
  • Fig. 3 is a side view of an annular sealing element that can be used in a gravity cup according to FIG. 1 instead of the inner bag according to FIG. 2,
  • FIG. 4 shows a sectional view of a flow cup arrangement according to a second embodiment of the invention
  • Figs. 6 and 7 show an enlarged sectional view of the connection between the lid assembly and the material container of the gravity cup according to FIGS. 1 and 4 with and without a clamped inner bag and
  • FIG. 8 to 10 schematic side views to illustrate variants of optionally replaceable inner bags for the flow cup according to FIG. 4.
  • FIG. 1 shows a hand-held spray gun 1 for the compressed air-assisted atomization and application of a free-flowing coating material.
  • the spray gun 1 can be designed, for example, as a so-called high-pressure, compliant or HVLP spray gun 1 .
  • the spray gun 1 has a cup connection 2 and a nozzle head 3 at which the coating material supplied to the spray gun 1 via the cup connection 2 is atomized and emerges in the form of a spray jet.
  • the spray gun 1 comprises a handle 4, a trigger guard 5 for actuating a material needle 10 arranged inside the spray gun 1, an adjustment mechanism 6 for the stroke of the material needle (material quantity regulation), an air pressure adjustment device 7 (micrometer), a round/broad jet adjustment device 8 and a compressed air connection 9.
  • an atomization and transport air on the one hand and a horn air for one wide beam shaping on the other hand can be changed.
  • a flow cup arrangement 11 is connected to the cup connection 2 of the spray gun 1 by means of a material outlet designed as an outlet connection piece 12 .
  • the outlet connector 12 is equipped with connection means in the manner of a bayonet lock, which include a clamping wedge element 13 that protrudes radially from the outlet connector 12 .
  • the clamping wedge element 13 engages in a corresponding receiving groove 14 on the spray gun 1 .
  • the outlet port 12 seals axially z. B. by means of its end face 15 on the cup connection 2 (possibly via a clamping ring on the inner bag, Fig. 2) and/or radially with the aid of two circumferential radial sealing lips 16 (hardly visible in Fig. 1 due to the proportions).
  • the gravity cup arrangement 11 comprises a gravity cup 17 and an inner bag 18 arranged in the gravity cup 17.
  • the gravity cup 17 has a material container 19, on the bottom of which the outlet nozzle 12 is formed.
  • the flow cup 17 comprises a lid arrangement closing the material container 19 in the form of a screw lid 20.
  • FIG. 2 shows the inner bag 18 again on its own. It is made, for example, from plastic using a deep-drawing process.
  • An edge 21 of the inner bag 18 is clamped between the screw cap 20 and the material container 19 .
  • a tubular peripheral wall 22 lining the interior of the material container 19 .
  • the peripheral wall 22 merges into a funnel-shaped outlet extension 23, which is adapted in terms of shape to the material passage of the outlet connector 12, lines it and is guided through it.
  • the open end of the outlet extension 23 is provided with a circumferential clamping ring 24, by means of which the outlet extension 23 is fixed to the end face 15 of the outlet connector 12.
  • a disc-shaped Screen element 25 is used, through which the coating material must pass before it can leave the inner bag 18 via the outlet port 12.
  • a tubular screen element can be used, which is inserted into the outlet socket 12 on the cup side and/or into the cup connection 2 on the pistol side.
  • the gravity cup 17 according to FIG. 1 is designed as a standard gravity cup. It can be filled with coating material with or without the inner bag 18 and used to deliver the coating material to the spray gun 1 via the material outlet.
  • connection 26 between the material container 19 and the screw cap 20 is designed in such a way that when the flow cup 17 with the inner bag 18 is used, the inner bag 18 is clamped between the material container 19 and the screw cap 20, with the screw cap 20 having a sufficient holding force is held on the material container 19 and the connection is fluid-tight.
  • the connection is also secure and fluid-tight when using the flow cup 17 without an inner bag 18 .
  • FIG 3 shows an annular sealing element 27 that can be mounted between the screw cap 20 and the material container 19 instead of the inner bag 18 in order to ensure that the connection between the screw cap 20 and the material container 19 is fluid-tight even when the inner bag 18 is not used.
  • the sealing element 27 corresponds in shape to the edge section of the inner bag 18. It comprises an identically designed edge 28 and a sealing collar 29 protruding downwards in FIG to mount an insert without an inner bag 18, since the screw cap 20 and the material container 19 are designed in such a way that they can also be connected directly to one another in a fluid-tight manner.
  • a central area 30 of the screw cap 20 is provided with a ventilation device.
  • the ventilation device is listed as plug valve 31.
  • the plug valve 31 enables pressure equalization inside the gravity cup 17 when coating material flows out of the gravity cup 17 via the outlet connection 12 or the outlet extension 23 of the inner bag 18.
  • the inner bag 18 does not have to contract with this gravity cup arrangement 11 when coating material is applied to the Pointed gun 1 is released.
  • the plug-in valve 31 has a manually actuable closure element in the form of a closure cap 32, by means of which a ventilation opening 33 in the end wall 34 of the screw cap 20 can be closed.
  • the closure cap 32 can be assembled or disassembled by a user as required.
  • FIG. 4 shows a second exemplary embodiment of a gravity cup arrangement 11 with a gravity cup 17 and an inner bag 18 arranged therein.
  • the gravity cup 17 according to the second exemplary embodiment is designed as an upsidedown gravity cup, in contrast to the gravity cup 17 according to FIG. 1 .
  • the screw connection 26 between the screw cap 20 and the material container 19, the plug-in valve 31 and the connection means on the outlet connection 12 are, however, identical in construction to the corresponding components of the flow cup arrangement 11 according to FIG.
  • the outlet socket 12 is arranged on the screw cap 20 and the plug-in valve 31 is arranged on the bottom 37 of the material container 19 .
  • a sieve element receptacle 36 for a flat, disc-shaped sieve element (not shown) analogous to the sieve element 25 shown in FIG.
  • a tubular plug-in screen can be used, which can be fastened in the outlet socket 12 or in the cup connection 2 on the spray gun side.
  • Fig. 4 the plug valve 31 is shown in a closed position.
  • the piercing valve 31 Before using the flow cup 17 with an inner bag 18, the piercing valve 31 must be opened so that air can flow into the space between the inner bag 18 and the material container 19, while the inner bag 18 contracts due to the escape of coating material from its interior.
  • the closure cap 32 of the straightening valve 31 can also be completely dismantled beforehand.
  • the bottom 37 is largely smooth on the inside with a concavity extending uniformly over the entire bottom 37 .
  • This measure is particularly advantageous for an unimpeded and complete mixing of coating material in the flow cup 17 .
  • the point of the concave base 37 that protrudes furthest inward due to the concavity has an offset or a depth of 1% to 4%, more precisely 2% to 3% of the diameter of the base 37 compared to the outer edge area of the base 37 on.
  • a peripheral wall 38 of the material container 19 adjoins the concave bottom 37.
  • the peripheral wall 38 is conical to the extent that the bottom 37 (despite the concavity) adjoins the peripheral wall 38 at an angle of greater than 90°. In the exemplary embodiments shown, there is an angle of approximately 92°.
  • the inner bag 18, which is again shown separately in FIG. 5, is designed analogously. Like the inner bag 18 according to FIG. 2, the inner bag 18 has an edge 21 by means of which it can be clamped between the screw cap 20 and the material container 19 .
  • the peripheral wall 22 and the bottom 39 of the inner bag 18 are modeled after the material container 19 so that the inner bag 18 mounted inside largely completely lines the interior of the material container 19 and fits snugly against the walls of the material container 19 .
  • the base 39 of the inner bag 18 is consequently also provided with an indentation extending uniformly over the entire base 39 .
  • the peripheral wall 22 widens from the bottom 39 to the edge 21 (slightly) conically.
  • the flow cups 17 according to the first and second exemplary embodiment are preferably made of plastic in a plastic injection molding process, with the screw cap 20 and the material container 19 being formed in one piece apart from the closure cap 32 and the sieve elements 25 .
  • the components can also be composed of several components, in particular the material outlet (outlet connector 12) can be produced as a separate component and inserted into the rest of the lid arrangement or the rest of the material container.
  • one or more closure caps and/or one or more sieve elements can also be produced in one piece with the screw cap 20 or the material container 19 .
  • they can be attached at any point by tear-off webs, tabs, film hinges, etc., which can be severed in order to assemble the elements elsewhere.
  • the material containers 19 are made of polypropylene (PP), for example, and the screw caps 20 are made of hard polyethylene or high-density polyethylene (HDPE) or polypropylene (PP), for example.
  • the closure cap 32 is also made, for example, from hard polyethylene or high-density polyethylene (HDPE) or polypropylene (PP).
  • the flow cups 17 according to the invention are preferably extremely thin-walled products.
  • the wall thickness of the material container 19 is in the range from 0.55 mm to 0.65 mm, specifically around 0.60 mm, and the wall thickness of the screw cap 20 is in the range from 0.50 mm to 0.85 mm, specifically 0 .60mm.
  • the only exceptions are accumulations of material at local locations, e.g. B. for the formation of thread flanks, latching and gripping edges or on the outlet connector 12, in particular for the formation of the clamping wedge element 13.
  • the screw cap 20 of the first embodiment and the material container 19 of the second embodiment are preferably produced in an injection molding process in which the injection point of the components is as centrally as possible on the concave end wall (bottom 37, central area 30).
  • the ventilation device is arranged slightly off-centre. It is arranged with an offset of more than 5% but less than 10% of the diameter of the end wall 34 towards the middle of the end wall.
  • the offset between the eccentric ventilation opening 33 and the central injection point 40 is 5.50 mm, which corresponds to 6.50% for a diameter of the base 37 of 84.6 mm.
  • FIGS. 6 and 7 show an enlarged section of the structurally identical connection point of both the flow cup 17 according to FIGS. 1 as well as the flow cup 17 according to FIG. 4.
  • connection 26 with the inner bag 18 clamped between them.
  • the screw cap 20 and the material container 19 assume a first rotational position relative to one another.
  • the link 26 is without a inner bag 18 clamped between them.
  • the screw cap 20 and the material container 19 assume a second rotational position relative to one another.
  • the edge area of the material container 19 is provided with a roll-up 41, which is stiffened by means of several radial transverse ribs.
  • the transverse ribs end almost conclusively with the outer edge of the roll-up 41.
  • the roll-up 41 has an outer leg, a middle connecting web and an inner leg.
  • the inner leg merges into the peripheral wall 38 of the material container 19 .
  • FIGs. 6 and 7 shows a section through a radial transverse rib which is formed in one piece with the outer and inner legs and the central connecting web.
  • the dashed lines in Figs. 6 and 7 indicate the course of the outer and inner leg as well as the middle connecting bar.
  • Four thread elements in the form of thread ridges 42 are provided on the outside of the outer leg of the roll-up 41 .
  • the edge area of the screw cap 20 has a receiving groove 43, which is also formed by an outer leg, a central connecting web and an inner leg. In the closed state of the flow cup 17, the receiving groove 43 encompasses the roll-up 41 in the edge area of the material container 19.
  • threaded ridges 44 are formed which, together with the threaded ridges 42 on the material container 19, form the multi-threaded screw connection 26. All four thread webs 44 begin approximately at the lower edge of the outer leg and open into the middle connecting web, which forms the bottom of the receiving groove 43 . The thread webs 44 therefore partially overlap in the circumferential direction, but are axially offset from one another in the overlapping area.
  • the fluid-tight seal between the screw cap 20 and the material container 19 is achieved by a circumferentially sealing, radial and axial contact inside the receiving groove 43.
  • the radial seal is made by the peripheral wall 22 of the inner bag 18 in a radial annular gap 48 between the outside of the inner leg of the receiving groove 43 and the inside of the inner leg of the roll-up 41 of the material container 19 is clamped.
  • the axial seal is achieved by the edge 21 of the inner bag 18 being clamped in an axial annular gap 49 between the top of the central connecting web of the roll-up 41 and the underside of the central connecting web of the receiving groove 43, which also creates an end stop for the screw-closing movement between the screw cap 20 and the material container 19 is formed.
  • the screw cap 20 and the material container 19 assume a first position relative to one another, defined by this end stop, in which the fluid-tight seal and a sufficient holding force between them is ensured when the inner bag 18 is clamped.
  • the fluid-tight seal also takes place between the screw cap 20 and the material container 19 by means of a circumferentially sealing, radial contact inside the receiving groove 43.
  • the radial seal takes place in that the outside of the inner leg of the receiving groove 43 and the inside of the Inner leg of the roll-over 41 are directly pressed together to form a seal.
  • the thickness of the edge 21 of the inner bag 18, the thickness of the peripheral wall 22 and the taper of the upper cup rim of the material container 19 and the conicity of the section of the screw cap 20 that interacts with it are matched to one another in such a way that there is a sufficient axial 49 and radial annular gap 48 to accommodate the inner bag 18 between the screw cap 20 and the material container 19, as well as a fluid-tight seal during use with an inner bag 18 and nevertheless also forms a fluid-tight seal between the screw cap 20 and the material container 19 without an inner bag 18 .
  • the additional axial seal can be dispensed with.
  • the upper side of the central connecting web of the roll-up 41 can still come into contact with the underside of the central connecting web of the receiving groove 43 without forming a circumferential fluid-tight seal, but the contact still provides an end stop for the screw-closing movement between the screw cap 20 and Material container 19 is formed.
  • Figs. 6 and 7 three circumferential sealing ribs 47 are shown, which are formed on the outside of the inner leg of the receiving groove 43 and lead to a further strengthening of the sealing effect.
  • the sealing effect is improved in that the inner diameter of the material container 19 in the upper edge area is selected in such a way that the material container 19 is spread open when the screw cap 20 is installed, at least in the area of the roll-up 41, thus resulting in a particularly strong and sustained radial compression between the screw cap 20 and material container 19 results, which is reinforced when used with inner bag 18.
  • the central area 30 of the screw cap 20 is designed as a continuation of the Inner leg of the receiving groove 43 running. In the figs. 6 and 7 only an outer portion of the central region 30 is shown.
  • the inner leg is followed by a first ring section, which extends at least almost perpendicularly to the receiving groove 43 .
  • the ring section is followed by a second ring section, which runs at least almost parallel to the inner leg of the receiving groove 43 in such a way that a compensating ring groove 45 is formed, which is open in the opposite direction to the receiving groove 43 .
  • the compensating ring groove 45 z. B. manufacturing tolerances of the components are compensated, in particular to ensure the functionality, strength and tightness of the screw connection 26.
  • a desired support or rigidity of the inner leg of the receiving groove 43 can be defined via the dimensioning of the compensating ring groove 45 .
  • the inner bag 18 can be provided with at least one fold line 46, due to which the inner bag 18 contracts in the event of negative pressure in its interior or due to the negative pressure and/or reduced residual volume of coating material escaping from its interior.
  • the buckling line 46 or a plurality of buckling lines 46 can be introduced by changing the material (thermally, mechanically, chemically). For example, the wall thickness of the inner bag 18 can be reduced along the fold line 46 .
  • FIG. 8 shows an inner bag 18 which is provided with fold lines 46 that are closed all around.
  • fold lines 46 are shown as an example, which are introduced by reshaping the peripheral wall 22, the specific form of the reshaping being slightly different in each case.
  • a plurality of fold lines 46 are provided on an inner bag 18 , but they are of the same type.
  • FIG. 8 further fold lines 46 are only sketched as a dashed line in order to clarify how fold lines 46 can be distributed along the peripheral wall 22 .
  • the fold lines 46 are equidistant distances up.
  • the distances between the fold lines 46 can also increase or decrease from bottom to top in FIG.
  • FIG. 9 shows an inner bag 18 which is provided with a spiral fold line 46 by way of example.
  • FIG. 10 shows a variant of an inner bag 18, the peripheral wall 22 of which is designed as a lampion-like tube due to crossing, diamond-shaped fold lines 46.
  • the bottom, not shown, is closed and smooth, for example.
  • the edge 21 of the inner bag 18 connected to the peripheral wall 22 is only indicated in FIG. 10 by dashed circles.
  • the edges 21 of all inner bags 18 shown have a wall thickness of 0.5 mm to 0.7 mm.
  • the wall thickness of the peripheral walls 22 is 0.1 mm to 0.3 mm.
  • All of the inner bags 18 shown are flexibly collapsible but have sufficient inherent rigidity to be stable, i. H. collapsing or buckling without the influence of external forces.
  • the inner bags 18 are made of a fluid-tight, in particular solvent-resistant plastic.
  • the inner bags are preferably made from a stretchable plastic film and/or from PE (e.g. LDPE), PP, PET, a similar plastic or a mixture of these plastics.
  • the flow cup 17 according to the invention and the spray gun 1 equipped with it are suitable for atomizing and applying very different materials.
  • a main area of application is automotive refinishing, in which top coat, filler and clear coat are used and which places very high demands on atomization and the properties of the spray jet.
  • a large number of other materials can also be processed using the flow cup 17 and a possibly modified spray gun 1 .
  • the decisive factor is that the materials are flowable and can be sprayed, at least to a certain extent.

Landscapes

  • Closures For Containers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

La présente invention concerne un réservoir de fluide (17) pour un pistolet de pulvérisation (1), ledit réservoir de fluide présentant une sortie de matériau (12) qui est conçue pour être raccordée directement et/ou indirectement au pistolet de pulvérisation (1), le réservoir de fluide (17) comprenant un contenant de matériau (19) et un agencement de recouvrement (20) pour fermer de manière amovible le contenant de matériau (19), un sac intérieur (18) étant disposé dans le contenant de matériau (19) et pouvant être rempli de matériau de revêtement. Le réservoir de fluide (17) est conçu de telle sorte qu'il peut être rempli d'un matériau de revêtement éventuellement avec ou sans le sac intérieur (18) et peut être utilisé pour distribuer le matériau de revêtement par l'intermédiaire de la sortie de matériau (12) au pistolet de pulvérisation (1). La présente invention concerne également un sac intérieur (18) et un agencement de réservoir de fluide (11).
EP21752025.3A 2020-07-31 2021-07-29 Réservoir de fluide comportant un sac intérieur pouvant éventuellement être inséré Pending EP4188612A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020120231.8A DE102020120231A1 (de) 2020-07-31 2020-07-31 Fließbecher mit optional einsetzbarem Innenbeutel
PCT/EP2021/071253 WO2022023466A1 (fr) 2020-07-31 2021-07-29 Réservoir de fluide comportant un sac intérieur pouvant éventuellement être inséré

Publications (1)

Publication Number Publication Date
EP4188612A1 true EP4188612A1 (fr) 2023-06-07

Family

ID=77265068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21752025.3A Pending EP4188612A1 (fr) 2020-07-31 2021-07-29 Réservoir de fluide comportant un sac intérieur pouvant éventuellement être inséré

Country Status (4)

Country Link
US (1) US20230278050A1 (fr)
EP (1) EP4188612A1 (fr)
DE (1) DE102020120231A1 (fr)
WO (1) WO2022023466A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10213715A1 (de) 2001-11-14 2003-05-22 Martin Ruda Spritzpistolenbecher
US7665672B2 (en) 2004-01-16 2010-02-23 Illinois Tool Works Inc. Antistatic paint cup
US20060102550A1 (en) 2004-11-18 2006-05-18 Joseph Stephen C P Liquid supply and filter assembly
US20070158462A1 (en) 2005-12-30 2007-07-12 Neil Delbridge Liquid supply assembly and liquid spray apparatus
DE202007011604U1 (de) 2007-08-18 2009-01-02 Sata Gmbh & Co. Kg Anschlussteil zur Verbindung einer Materialzuführungseinrichtung an eine Spritzpistole
DE202010009104U1 (de) * 2009-10-23 2011-03-10 Sata Gmbh & Co. Kg Farbbehälter, insbesondere für Farbspritzpistolen
RU2608490C9 (ru) * 2012-03-06 2017-06-14 3М Инновейтив Пропертиз Компани Распылитель со встроенным нагнетательным каналом

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WO2022023466A1 (fr) 2022-02-03
DE102020120231A1 (de) 2022-02-03
US20230278050A1 (en) 2023-09-07

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