WO2000062941A1 - Electrically operated liquid dispensing apparatus and method for dispensing viscous liquid - Google Patents
Electrically operated liquid dispensing apparatus and method for dispensing viscous liquid Download PDFInfo
- Publication number
- WO2000062941A1 WO2000062941A1 PCT/US2000/009876 US0009876W WO0062941A1 WO 2000062941 A1 WO2000062941 A1 WO 2000062941A1 US 0009876 W US0009876 W US 0009876W WO 0062941 A1 WO0062941 A1 WO 0062941A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- interior portion
- armature
- dispenser
- valve stem
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
Definitions
- the present invention generally relates to apparatus for
- dispensing liquid and, more specifically, to electrically operated apparatus
- viscous liquids such as hot melt adhesives or epoxies.
- dispensers include an electromagnetic coil that produces an electromagnetic
- the electromagnetic field may be selectively controlled to open and
- valve stem which is operatively associated with an armature or acts
- the armature may
- a generally cylindrical armature may contain channels
- armature include reducing the diameter of the armature to provide a
- gap or channels will promote greater flow, but will also reduce the
- a catalyst are dispensed for bonding components to a circuit board.
- the catalyst can break down and this can adversely affect the curing
- the epoxy may cure while still in the
- invention includes a dispenser body with a first interior portion and a second
- the first interior portion communicates with an outlet for
- An armature is disposed within the second interior
- valve seat is disposed typically adjacent the outlet.
- valve stem is mounted within the first interior portion and is connected for movement with the armature between a closed position in
- valve stem engages the valve seat to prevent liquid flow from the
- the coil is adapted to
- passageway is in fluid communication with the first interior portion and is
- a seal member is mounted between the first and second
- valve stem may be an integral shaft
- the armature is coaxially aligned with and
- the armature is sized and shaped
- the armature has
- the present invention also contemplates a method for
- viscous liquid is supplied to the first interior portion from the liquid inlet passageway.
- the liquid is supplied to the first interior portion at
- a pressure ranging from about 1 0 to about 1 5 psi. More generally, the
- pressure may be less than about 1 00 psi and may be a minimum of about 3
- the liquid is prevented from entering the second interior portion and
- the coil is energized in order to
- valve stem moves between the opened and closed positions.
- the coil can
- the high viscosity liquid preferably, the high viscosity liquid
- liquids have a minimum viscosity of about 1 00 centipoise, however, the
- Fig. 1 is an axial cross-sectional view of an electrically
- Fig. 2 is a cross-sectional view of the liquid dispenser of Fig. 1
- a dispenser body 1 2 a liquid
- the dispenser 1 0 is
- dispensers can benefit from the invention as well.
- Such other liquids can benefit from the invention as well.
- soldering fluxes include soldering fluxes, thermal greases, heat transfer compounds, and
- the dispenser 1 0 is adapted to dispense liquids
- liquids having viscosities above about 1 500 centipoise and for epoxies or
- the dispenser body 1 2 has a first or lower interior portion 20
- stem 26 is mounted within the lower interior portion 20 and has a shaft 28
- a ball 30 is mounted to a lower end 28a of the shaft
- valve seat 32 which is shown in Fig. 1 in sealing engagement with a valve seat 32
- the nozzle body 1 4 also has a nozzle tip 36
- a liquid inlet passageway 46 is connected to the lower interior
- portion 20 is adapted to connect to a source 47 of pressurized liquid
- This source 47 may be a syringe supply device as shown in
- the source 47 of pressurized liquid Generally, the liquid coming from the source 47 is pressurized at between about 3 psi and about 100 psi. More
- the liquid is pressurized to about 1 0-1 5 psi.
- Arrows 50 indicate
- Dynamic seal member 52 is held between a washer 54
- passageway enters the lower interior portion 20 below dynamic seal
- the dynamic seal member 52 prevents liquid entering through
- the armature 60 operates in air and not liquid. Unlike other electrically
- the armature 60 is
- the armature 60 is sized such that in fills
- Gap "t" preferably is less than
- An electromagnetic coil 70 is disposed about the armature 60.
- electromagnetic coil 70 will be generally toroidal in shape.
- coil 70 generates an electromagnetic field
- valve stem 26 which actuates valve stem 26 to an open position as will be described
- a bore 80 extends into armature 60 to house a return spring
- the return spring 82 biases the valve stem 26 and, more specifically,
- 82 is more specifically a compression spring which is placed under
- pole 84 so as to attract armature 60 and pole 84 together. Since pole 84 cannot move, armature 60 will move against the force of spring 82 until
- the stroke length is the distance between armature 60 and
- brazing 88 connects pole 84 to a tubular member 90.
- Tubular member 90
- a tool such as a screwdriver, may be used to turn
- valve stem 26 varies the stroke length of valve stem 26.
- donut 98 is disposed about tubular member 90 and rests against an upper
- the dispenser 1 0 is constructed to
- circuit board 1 Accordingly, one suitable method for dispensing the
- the dispenser 1 0 is
- member 52 prevents liquid, such as the heat cure epoxy, from leaking out
- the electromagnetic coil 70 is energized to generate an
- valve stem 32 is moved from its initial closed position to an opened
- the electromagnetic coil 70 is de-energized such that
- valve stem 26 will move from its opened position
- the epoxy is supplied from the source 47 to the lower interior
- portion 20 under relatively low pressure, such as between about 10-1 5 psi.
- This pressure is substantially lower than that used in other electrically
- droplet of epoxy is produced primarily by the return action of the ball 30
- valve stem 26 is returned to the closed position by the return spring 82, the
Landscapes
- Coating Apparatus (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
- Magnetically Actuated Valves (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00923301A EP1169135B1 (en) | 1999-04-19 | 2000-04-13 | Method for dispensing viscous liquid |
AU43452/00A AU4345200A (en) | 1999-04-19 | 2000-04-13 | Electrically operated liquid dispensing apparatus and method for dispensing viscous liquid |
JP2000612069A JP2002542020A (en) | 1999-04-19 | 2000-04-13 | Electric liquid dispensing apparatus and method for dispensing viscous liquid |
DE60006659T DE60006659T2 (en) | 1999-04-19 | 2000-04-13 | METHOD FOR DISPENSING VISCOSIC LIQUIDS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US29427599A | 1999-04-19 | 1999-04-19 | |
US09/294,275 | 1999-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000062941A1 true WO2000062941A1 (en) | 2000-10-26 |
Family
ID=23132680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/009876 WO2000062941A1 (en) | 1999-04-19 | 2000-04-13 | Electrically operated liquid dispensing apparatus and method for dispensing viscous liquid |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1169135B1 (en) |
JP (1) | JP2002542020A (en) |
AU (1) | AU4345200A (en) |
DE (1) | DE60006659T2 (en) |
WO (1) | WO2000062941A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002075192A1 (en) | 2001-03-16 | 2002-09-26 | Henkel Loctite Deutschland Gmbh | Valve for discharging a fluidic material |
EP2523894A1 (en) * | 2010-01-14 | 2012-11-21 | Nordson Corporation | Jetting discrete volumes of high viscosity liquid |
WO2014143089A1 (en) * | 2013-03-13 | 2014-09-18 | Graco Minnesota Inc. | Removable module service seat |
US9427768B2 (en) | 2012-10-26 | 2016-08-30 | Nordson Corporation | Adhesive dispensing system and method with melt on demand at point of dispensing |
EP3702047A1 (en) * | 2019-03-01 | 2020-09-02 | Nordson Corporation | Apparatus for dispensing liquid material to a substrate |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3412971A (en) * | 1966-03-03 | 1968-11-26 | Armstrong Cork Co | Electrically-controlled valve apparatus and control circuit suitable for use therein |
-
2000
- 2000-04-13 JP JP2000612069A patent/JP2002542020A/en active Pending
- 2000-04-13 WO PCT/US2000/009876 patent/WO2000062941A1/en active IP Right Grant
- 2000-04-13 EP EP00923301A patent/EP1169135B1/en not_active Expired - Lifetime
- 2000-04-13 DE DE60006659T patent/DE60006659T2/en not_active Expired - Fee Related
- 2000-04-13 AU AU43452/00A patent/AU4345200A/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3412971A (en) * | 1966-03-03 | 1968-11-26 | Armstrong Cork Co | Electrically-controlled valve apparatus and control circuit suitable for use therein |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002075192A1 (en) | 2001-03-16 | 2002-09-26 | Henkel Loctite Deutschland Gmbh | Valve for discharging a fluidic material |
EP2523894A1 (en) * | 2010-01-14 | 2012-11-21 | Nordson Corporation | Jetting discrete volumes of high viscosity liquid |
EP2523894A4 (en) * | 2010-01-14 | 2014-03-19 | Nordson Corp | Jetting discrete volumes of high viscosity liquid |
US9314812B2 (en) | 2010-01-14 | 2016-04-19 | Nordson Corporation | Jetting discrete volumes of high viscosity liquid |
US10363568B2 (en) | 2010-01-14 | 2019-07-30 | Nordson Corporation | Jetting discrete volumes of high viscosity liquid |
US9427768B2 (en) | 2012-10-26 | 2016-08-30 | Nordson Corporation | Adhesive dispensing system and method with melt on demand at point of dispensing |
US10245613B2 (en) | 2012-10-26 | 2019-04-02 | Nordson Corporation | Adhesive dispensing system and method with melt on demand at point of dispensing |
US11033926B2 (en) | 2012-10-26 | 2021-06-15 | Nordson Corporation | Adhesive dispensing system and method with melt on demand at point of dispensing |
WO2014143089A1 (en) * | 2013-03-13 | 2014-09-18 | Graco Minnesota Inc. | Removable module service seat |
CN105142800A (en) * | 2013-03-13 | 2015-12-09 | 格瑞克明尼苏达有限公司 | Removable module service seat |
EP3702047A1 (en) * | 2019-03-01 | 2020-09-02 | Nordson Corporation | Apparatus for dispensing liquid material to a substrate |
Also Published As
Publication number | Publication date |
---|---|
EP1169135A1 (en) | 2002-01-09 |
DE60006659T2 (en) | 2004-10-07 |
DE60006659D1 (en) | 2003-12-24 |
EP1169135B1 (en) | 2003-11-19 |
AU4345200A (en) | 2000-11-02 |
JP2002542020A (en) | 2002-12-10 |
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