WO2013158209A1 - Dispositifs et procédé de nettoyage pour cartouche de distribution de fluide - Google Patents

Dispositifs et procédé de nettoyage pour cartouche de distribution de fluide Download PDF

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Publication number
WO2013158209A1
WO2013158209A1 PCT/US2013/026669 US2013026669W WO2013158209A1 WO 2013158209 A1 WO2013158209 A1 WO 2013158209A1 US 2013026669 W US2013026669 W US 2013026669W WO 2013158209 A1 WO2013158209 A1 WO 2013158209A1
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WO
WIPO (PCT)
Prior art keywords
fluid
cartridge
connector
cleaning
dispensing cartridge
Prior art date
Application number
PCT/US2013/026669
Other languages
English (en)
Inventor
Stanley Cruz AGUILAR
Erik Fiske
David N. Padgett
Original Assignee
Nordson Corporation
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 Nordson Corporation filed Critical Nordson Corporation
Publication of WO2013158209A1 publication Critical patent/WO2013158209A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
    • B05B15/531—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using backflow

Definitions

  • the invention generally relates to the field of dispensing fluids. More particularly, the invention relates to cleaning devices, and related methods, for cleaning fluid dispensing cartridges that are used in operation to dispense droplets of fluid from the cartridge.
  • Dispensing cartridges are devices that eject, or dispense, a droplet of material from the dispensing machine to land on a substrate, and different dispensing cartridges may be used for different applications, for example.
  • One type of dispensing cartridge includes an inlet for receiving fluid and an outlet for dispensing the fluid.
  • a fluid passageway in the cartridge connects the inlet and the outlet, and a valve member controls the dispensing of the fluid through the outlet.
  • the valve member is selectively operated to allow, or prevent, fluid flow through the outlet.
  • a fluid is provided into such a cartridge by way of the inlet.
  • the fluid advances through the fluid passageway in the cartridge toward the outlet.
  • the valve member in the cartridge controls when the fluid is dispensed through the outlet.
  • the cartridge may contain amounts of residual fluid.
  • residual fluid may remain around the inlet or outlet, in the fluid passageway, or on the valve member. This residual fluid might harden or otherwise interfere with the desired operation of the cartridge and present problems for the cartridge's subsequent use.
  • Embodiments of the present invention are directed to a cleaning device for cleaning a fluid dispensing cartridge, to a cartridge holder for cleaning a fluid dispensing cartridge, and to a method of cleaning a fluid dispensing cartridge.
  • a device for cleaning a fluid dispensing cartridge includes an inlet, an outlet, a passageway extending between the inlet and outlet, and a valve member within the passageway.
  • the device for cleaning the fluid dispensing cartridge includes a cartridge holder configured to receive the fluid dispensing cartridge.
  • the cartridge holder includes a first connector configured to be connected with the inlet of the fluid dispensing cartridge and a second connector configured to be connected with the outlet of the fluid dispensing cartridge.
  • the device further includes a first fluid line coupled with the first connector and a second fluid line coupled with the second connector.
  • the device further includes a fluid supply selectively coupled with the first fluid line or the second fluid line.
  • the fluid supply is configured to hold a cleaning fluid. Cleaning fluid is directed from the fluid supply through the first fluid line or the second fluid line for flow through the passageway of the fluid dispensing cartridge.
  • a cartridge holder is provided.
  • the cartridge holder is configured to receive a fluid dispensing cartridge having an inlet, an outlet, a passageway extending between the inlet and outlet, and a valve member within the passageway.
  • the cartridge holder includes a first connector configured to be connected with the inlet of the fluid dispensing cartridge and a second connector configured to be connected with the outlet of the fluid dispensing cartridge.
  • the first connector and the second connector are further configured to be connected with a fluid supply configured to hold a cleaning fluid.
  • Cleaning fluid can be directed from the fluid supply through the first connector or the second connector for flow through the passageway of the fluid dispensing cartridge.
  • a method for cleaning a fluid dispensing cartridge having an inlet, an outlet, a passageway extending between the inlet and outlet, and a valve member within the passageway. The method includes connecting the inlet of the fluid dispensing cartridge with a first connector of a cartridge holder, and directing a cleaning fluid through the first connector and through the passageway of the fluid dispensing cartridge.
  • FIG. 1 is a front isometric view showing a cleaning device constructed according to an embodiment of the present invention.
  • FIG. 2 is a rear isometric view of the cleaning device of FIG. 1.
  • FIG. 3 is a front isometric view showing the cartridge holder assembly of the cleaning device of FIGS. 1 and 2, as well as a cartridge that is held by the cartridge holder assembly.
  • FIG. 4A is a cross-sectional view of the cartridge holder assembly of FIG. 3, with a cartridge positioned adjacent the cartridge holder assembly.
  • FIG. 4B is a cross-sectional view of the cartridge holder assembly of FIG. 3, with the cartridge of FIG. 4A positioned in a cartridge dock of the cartridge holder assembly, and showing a first direction of fluid flow indicated by the arrows.
  • FIG. 4C is a cross-sectional view of the cartridge holder assembly of FIG. 3, which has been configured to perform a streaming operation.
  • FIG. 5 is a further cross-sectional view of the cartridge holder assembly of FIG. 3, showing a second direction of fluid flow indicated by the arrows, and showing a valve actuator engaging a valve assembly in the cartridge.
  • FIG. 6 is a rear isometric partially disassembled view of the cleaning device of FIG. 1 with portions of the housing removed therefrom so as to reveal features of the fluid interconnect network.
  • the cleaning device 10 is configured for cleaning a fluid dispensing cartridge of the type used in a machine that dispenses material onto a substrate.
  • a fluid dispensing cartridge of the type used in a machine that dispenses material onto a substrate.
  • such cartridges may be used to dispense fluids like underfills, encapsulation materials, surface mount adhesives, solder pastes, conductive adhesives, solder masks, fluxes, thermal compounds, and others, onto a substrate, and from time to time the cartridges may require cleaning to remove the build up of accumulated or hardened fluid.
  • the cleaning device 10 generally includes several interconnected components, including a cleaning fluid supply 12, a waste fluid receptacle 14, a cartridge holder assembly 16, an air regulator 18, and a cleaning fluid filter 20.
  • the cleaning device 10 also includes a housing 21, which in the embodiment shown, encloses several of the cleaning device's components.
  • the components of the cleaning device 10 are operatively connected by a fluid interconnect network 22 that includes an assortment of fluid conduits, fittings, connectors, and other such components that allow air and cleaning fluid to flow therethrough, some of which are contained within the housing 21 and some of which extend outside the housing 21.
  • the cleaning device 10 uses pressurized air to force a cleaning fluid through a cartridge.
  • the air regulator 18 is configured to receive air or other pressurized gas at an air supply inlet 24. Air may be provided to the air supply inlet 24 from any source, and is preferably pressurized, such as shop air pressurized by a compressor. The air regulator 18 is further configured to regulate the air pressure of air provided to the other components of the cleaning device 10. To that end, the air regulator 18 may include an air pressure adjuster, such as adjustment knob 26, and may include an air pressure indicator 28 in the representative form of a gauge that provides a user with a visual indication of an air pressure value. The air regulator 18 is in fluid communication with the cleaning fluid supply 12 through the fluid interconnect network 22.
  • Air may be provided to the air supply inlet 24 from any source, and is preferably pressurized, such as shop air pressurized by a compressor.
  • the air regulator 18 is further configured to regulate the air pressure of air provided to the other components of the cleaning device 10.
  • the air regulator 18 may include an air pressure adjuster, such as adjustment knob 26, and may include an air pressure indicator 28 in the representative form of a
  • the air flow controller 30 is configured to control the flow of air between the air regulator 18 and the cleaning fluid supply 12, and consequently controls the flow of air or cleaning fluid through the other components of the cleaning device 10 downstream of the air flow controller 30.
  • the air flow controller 30 is associated with an air flow actuator 32 that is situated outside the housing 21 and accessible by a user (see FIG. 1).
  • the air flow actuator 32 controls the air flow controller 30.
  • a user can switch the air flow on or off using the air flow actuator 32, which in the embodiment shown is in the form of a toggle switch. Air that passes through the air flow controller 30 is directed to the cleaning fluid supply 12 through the fluid interconnect network 22.
  • the cleaning fluid supply 12 includes a container 34 for containing a volume of cleaning fluid, such as isopropyl alcohol, acetone, water, or other liquid or solvent.
  • a volume of cleaning fluid such as isopropyl alcohol, acetone, water, or other liquid or solvent.
  • the container 34 may be in the shape of a generally cylindrical syringe, but other suitable containers could also be used.
  • Pressurized air is received from the air regulator 18 in the container 34 at an air inlet 36 of a cap 37 of the container 34.
  • Cleaning fluid may be introduced into the container 34 by removing the cap 37 and adding the cleaning fluid to the container 34.
  • the pressurized air is introduced into the head space in the container 34 above any cleaning fluid contained therein and acts on the cleaning fluid in the container 34 by pushing it toward and out of an outlet 39, which in the embodiment shown is inside the housing 21 at the base of the container 34 (see FIG. 6).
  • the outlet 39 of the container 34 is fluidly coupled with the fluid interconnect network 22 so as to provide cleaning fluid to other components of the cleaning device 10, as will be described.
  • the container 34 of the cleaning fluid supply 12 is transparent so that the fluid level of cleaning fluid inside the container 34 can be observed without removing the cap 37 from the container 34 and without removing the container 34 from the housing 21.
  • the housing 21 includes window portions 38 near the base of the container 34, thereby allowing a user to observe the amount of cleaning fluid in the container 34, including near the outlet 39, without removing the container 34 from the housing 21.
  • Cleaning fluid leaving the outlet 39 of the container 34 of the cleaning fluid supply 12 is transferred through the fluid interconnect network 22 to the cleaning fluid filter 20 (see FIG. 2).
  • the cleaning fluid filter 20 is configured to filter undesirable particles or compounds from the cleaning fluid, and in the embodiment shown, is mounted on the outside of the housing 21. Of course, the cleaning fluid filter 20 could also be positioned inside the housing 21.
  • a flow-reversing controller 40 see FIG. 6
  • the flow-reversing controller 40 is a five ported 4 way toggle valve.
  • the flow-reversing controller 40 is situated inside the housing 21 and is configured to receive cleaning fluid from the cleaning fluid supply 12 and provide cleaning fluid to the cartridge holder assembly 16. In addition, the flow-reversing controller 40 is configured to reverse the direction of fluid flow through the cartridge holder assembly 16. The flow-reversing controller 40 is also configured to receive waste fluid from the cartridge holder assembly 16 and direct it to the waste fluid receptacle 14. The flow-reversing controller 40 is associated with a flow-reversing actuator 42 (see FIG. 1), which in the embodiment shown is situated outside the housing 21 and accessible by a user, and is in the form of a toggle switch.
  • a first connection line 44 and a second connection line 46 are part of the fluid interconnect network 22 and connect the flow-reversing controller 40 with the cartridge holder assembly 16.
  • the connection lines 44, 46 and the flow-reversing controller 40 allow for fluid flow to and from the cartridge holder assembly 16 in two directions. In a first direction, fluid flows from the flow-reversing controller 40 through the first connection line 44 and to the cartridge holder assembly 16, and returns to the flow-reversing controller 40 via the second connection line 46 (see arrows indicating first direction in FIG. 4B).
  • fluid flows from the flow-reversing controller 40 through the second connection line 46 and to the cartridge holder assembly 16, and returns to the flow-reversing controller 40 via the first connection line 44 (see arrows indicating second direction in FIG. 5). Cleaning fluid that is returned to the flow-reversing controller 40 through lines 44 or 46 is then directed to the waste fluid receptacle 14.
  • the flow-reversing actuator 42 allows a user to select fluid flow in either the first direction or the second direction.
  • the cartridge holder assembly 16 is further described.
  • the cartridge holder assembly 16 is configured to receive cleaning fluid from the flow-reversing controller 40.
  • the cartridge holder assembly 16 is configured to receive pressurized air, as will be described later.
  • the flow of cleaning fluid or air to the cartridge holder assembly 16 can be in two directions, as provided by the flow- reversing controller 40.
  • the cartridge holder assembly 16 is configured to receive a cartridge 54 and includes a main body portion 50 and a cartridge dock 52.
  • the cartridge dock 52 is configured to receive the cartridge 54 so that fluid communication between the first and second connection lines 44, 46 can be established through the cartridge 54.
  • the first connection line 44 is connected to the cartridge holder assembly 16 through a first connector 56 that includes a fluid passageway therein.
  • the second connection line 46 is connected to the cartridge holder assembly 16 through a second connector 58 that includes a fluid passageway therein.
  • the second connector 58 is generally slidably moveable with respect to the main body portion 50, as will be further explained below.
  • the cartridge 54 shown in the figures is of the type used in machines for dispensing a fluid material onto a substrate.
  • the cartridge 54 may be one of the modular nozzle cartridges shown and described in U.S. Patent Application No. 13/219,064, filed August 26, 2011 and titled “Modular Jetting Devices", the disclosure of which is hereby incorporated by reference herein in its entirety.
  • the modular nozzle cartridge is referred to as fluid module 12.
  • the cartridge 54 includes a fiuid passageway extending therethrough between a first port 60, which is the fluid inlet in normal operation, and a second port 62, which is the fiuid outlet in normal operation.
  • a valve assembly 64 is disposed in the fiuid passageway of the cartridge 54 for controlling the flow of material therethrough. More specifically, the valve assembly 64 may include a diaphragm spring with a valve member fixed to it. The diaphragm spring biases the valve member away from a valve seat that is located below the valve member in the fluid passageway leading to the normal fluid outlet, or port 62, such that the valve is normally open. To close the valve, an actuator external to the cartridge 54 acts upon the diaphragm spring to push the valve member into engagement with the valve seat.
  • the first port 60 of the cartridge 54 is configured to be mated with the first connector 56 so that a fluid communication relationship is established between the first connection line 44 and the fluid passageway of the cartridge 54.
  • a fitting 66 may be used to make the mating connection.
  • the second port 62 of the cartridge 54 is configured to be mated with the second connector 58 so that a fluid communication relationship is established between the fluid passageway of the cartridge 54 and the second connection line 46.
  • a seal member, such as an o-ring 68, is provided for encouraging a fluid-tight seal between the cartridge 54 and the second connector 58 near the second port 62.
  • the cartridge holder assembly 16 also includes a cartridge seating assembly 70 for seating the cartridge 54 in the cartridge dock 52.
  • the cartridge seating assembly 70 includes an adjustment knob 72 operatively connected to a cartridge seating member 74, and is configured to move the cartridge seating member 74 toward and away from the cartridge 54. In particular, the seating member 74 can be moved downwardly into contacting engagement with the cartridge 54 to move the cartridge 54.
  • the cartridge seating assembly 70 is used to urge the cartridge 54 downwardly so the second port 62 comes into sealing contact with the o-ring 68 of the second connector 58 (as shown in FIGS. 4B and 5).
  • the adjustment knob is adjusted so that the cartridge 54 is not urged into sealing contact with the o-ring 68, and so the seating member 74 is not in contacting engagement with the cartridge 54.
  • the cartridge seating assembly 70 may also include structure such as clutching devices, springs, or other useful features for controlling the operation of the adjustment knob 72 and the cartridge seating member 74.
  • the cartridge holder assembly 16 also includes a valve actuator 76 for selectively actuating the valve assembly 64 of the cartridge 54.
  • the valve actuator 76 includes an adjustment knob 78 associated with a stem 80 that is configured to selectively engage the valve assembly 64 in the cartridge 54 when the cartridge 54 is seated in the cartridge dock 52.
  • the stem 80 is moved downwardly to contact and force the valve member inside the cartridge 54 against the valve seat within the cartridge 54 to close the valve, as shown in FIG. 5.
  • the valve actuator 76 may also include structure such as clutching devices, springs, or other useful features for controlling the operation of the adjustment knob 78 and the stem 80.
  • cleaning fluid can be directed by the cleaning device 10 through the cartridge 54 to dissolve, dislodge, and flush, or otherwise remove, any unwanted materials.
  • a user can selectively direct cleaning fluid in the first direction into the cartridge 54 through the first connection line 44 and through the first port 60, and out the cartridge 54 through the second port 62 and the second connection line 46.
  • cleaning fluid can be directed in the second direction into the cartridge 54 through the second connection line 46 and through the second port 62, and out the cartridge 54 through the first port 60 and the first connection line 44.
  • a user could also direct cleaning fluid through the cartridge 54 in both the first and second directions, such as by choosing one direction over a period of time, and then changing the direction using the flow-reversing actuator 42 so as to choose the other direction over a further period of time.
  • the waste fluid receptacle 12 includes a container 82 for containing the waste fluid, which is directed into the container 82 through an inlet 84 of a cap 85.
  • the container 82 of the waste fluid receptacle 12 may also be transparent so that the fluid level of waste fluid inside the container 82 can be observed without removing the cap 85 from container 82 and without removing the container 82 from the housing 21.
  • the cartridge holder assembly 16 can also be used to perform a streaming operation through the cartridge 54.
  • the main body portion 50 further includes a space generally below the cartridge 54 for receiving a streaming flow receptacle 86 (as shown in FIGS. 3, 4A-C, and 5).
  • the streaming flow receptacle 86 can include a container 88 that is threadably retained by a threaded receiving portion 90 of the main body portion 50.
  • the streaming flow receptacle 86 is generally not fluidly coupled with other components of the cleaning device 10 through the fluid interconnect network 22, though it could be coupled with the waste fluid receptacle 14.
  • the second connector 58 is moveable with respect to the main body portion 50.
  • the second connector 58 is moveable between a first position and a second position.
  • a fluid connection is maintained between the second port 62 of the cartridge 54 and the second connector 58.
  • a fluid connection is not maintained between the second port 62 of the cartridge 54 and the second connector 58.
  • cleaning fluid delivered to the cartridge 54 through the first connection line 44 can flow through the cartridge 54 and exit the second port 62 and stream directly into the streaming flow receptacle 86.
  • This is referred to as a streaming operation, and through such a streaming operation a user can visually inspect the quality of fluid flow through the cartridge 54. This visual inspection allows the user to determine whether further cleaning of the cartridge 54 is necessary.
  • valve actuator 76 can also operate the valve actuator 76 to selectively adjust the valve assembly 64 in the cartridge 54, as desired.
  • the valve actuator 76 can be used to close the valve assembly 64 to check the integrity of the valve function of the cartridge 54 for leakage.
  • any cleaning fluid leakage can be observed by dripping or seeping of cleaning fluid, which can indicate that the cartridge 54 has worn out and should be replaced.
  • the container 88 of the streaming flow receptacle 86 is transparent so that the fluid level of cleaning fluid or waste fluid inside the container 88 can be observed.
  • the housing 21 includes window portions 92 that allow a user to view fluid flowing into the container 88 and fluid level without removing the container 88 from the housing 21.
  • pressurized air can also be directed through all the components thereof and through the cartridge 54. This can be accomplished, for example, by allowing the cleaning fluid within the cleaning fluid supply 12 to be consumed during a cleaning operation so that the cleaning fluid supply 12 is empty. Alternatively, cleaning fluid can be removed from the container 34. Pressurized air supplied to the cleaning fluid supply 12 can flow through the flow-reversing controller 40 and into the cartridge 54 in the same manner as the liquid cleaning fluid would normally flow (as described above). Also, the direction of the flow of air through the cartridge 54 could be reversed just as the direction of flow can be reversed when liquid cleaning fluid is used.
  • directing air through the cleaning device 10 and the cartridge 54 would be useful for removing any residual liquid cleaning fluid from the internal passageway of the cartridge 54.
  • a separate pneumatic circuit of fluid lines and appropriate valving may be provided to direct pressurized air directly to the cartridge holder assembly 16, bypassing the cleaning fluid supply 12.
  • a cartridge holder assembly similar to the cartridge holder assembly 16 may be used without being part of a larger cleaning device 10.
  • the cartridge holder assembly would be manually connected to a source of pressurized cleaning fluid or air for performing cleaning and streaming operations, as discussed above.
  • references herein to terms such as “vertical”, “horizontal”, etc. are made by way of example, and not by way of limitation, to establish a frame of reference. Terms, such as “on”, “above”, “below”, “side”, “upper”, “lower”, “over”, “beneath”, and “under”, are defined with respect to a horizontal plane. It is understood that various other frames of reference may be employed for describing the invention without departing from the spirit and scope of the invention. It is also understood that features of the invention are not necessarily shown to scale in the drawings. [0046] It will be understood that when an element as a layer, region or substrate is described as being “on” or “over” another element, it can be directly on or over the other element or intervening elements may also be present.

Landscapes

  • Cultivation Of Plants (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Cleaning In General (AREA)

Abstract

Dispositif (10) de nettoyage d'une cartouche de distribution de fluide (54). La cartouche de distribution de fluide (54) comprend une entrée (60), une sortie (62), un passage s'étendant entre l'entrée et la sortie, et un élément soupape (64) placé à l'intérieur du passage. Le dispositif (10) comprend un support de cartouche (16) configuré pour recevoir la cartouche de distribution de fluide (54). Le support de cartouche (16) comprend un premier raccord (56) configuré pour être raccordé à l'entrée (60) de la cartouche de distribution de fluide (54) et un second raccord (58) configuré pour être raccordé à la sortie (62) de la cartouche de distribution de fluide (54). Le dispositif (10) comprend en outre une première conduite de fluide (44) reliée au premier raccord (56) et une seconde conduite de fluide (46) reliée au seconde raccord (58). Le dispositif (10) comprend en outre une réserve de fluide (12) couplée de manière sélective à la première conduite de fluide (44) ou à la seconde conduite de fluide (46). La réserve de fluide (12) est configurée pour contenir un fluide de nettoyage. Le fluide de nettoyage est dirigé depuis la réserve de fluide (12) à travers la première conduite de fluide (44) ou la seconde conduite de fluide (46) de manière à s'écouler à travers le passage de fluide de la cartouche de distribution de fluide (54).
PCT/US2013/026669 2012-04-20 2013-02-19 Dispositifs et procédé de nettoyage pour cartouche de distribution de fluide WO2013158209A1 (fr)

Applications Claiming Priority (2)

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US201261636322P 2012-04-20 2012-04-20
US61/636,322 2012-04-20

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WO2013158209A1 true WO2013158209A1 (fr) 2013-10-24

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PCT/US2013/026669 WO2013158209A1 (fr) 2012-04-20 2013-02-19 Dispositifs et procédé de nettoyage pour cartouche de distribution de fluide
PCT/US2013/037480 WO2013159061A1 (fr) 2012-04-20 2013-04-19 Mélange favorisant la croissance des plantes

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JP (1) JP2015519044A (fr)
CN (1) CN104270952A (fr)
AU (1) AU2013249038A1 (fr)
CA (1) CA2870558A1 (fr)
PH (1) PH12014502344A1 (fr)
WO (2) WO2013158209A1 (fr)

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JP2018079417A (ja) * 2016-11-15 2018-05-24 株式会社スギノマシン ノズル洗浄方法及び微粒化装置のノズル洗浄構造
CN108067387A (zh) * 2016-11-15 2018-05-25 杉野机械股份有限公司 喷嘴洗净方法和微粒化装置的喷嘴洗净结构

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JP2015519044A (ja) 2015-07-09
PH12014502344A1 (en) 2014-12-22
CN104270952A (zh) 2015-01-07
CA2870558A1 (fr) 2013-10-24
WO2013159061A1 (fr) 2013-10-24

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