US3807641A - Spray head - Google Patents

Spray head Download PDF

Info

Publication number
US3807641A
US3807641A US00323890A US32389073A US3807641A US 3807641 A US3807641 A US 3807641A US 00323890 A US00323890 A US 00323890A US 32389073 A US32389073 A US 32389073A US 3807641 A US3807641 A US 3807641A
Authority
US
United States
Prior art keywords
diaphragm
air
seat
passageway
inlet passageway
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.)
Expired - Lifetime
Application number
US00323890A
Other languages
English (en)
Inventor
J Albright
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.)
Advance Products Corp
Original Assignee
Advance Products Corp
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 Advance Products Corp filed Critical Advance Products Corp
Priority to US00323890A priority Critical patent/US3807641A/en
Priority to CA189,202A priority patent/CA990763A/en
Priority to GB49974A priority patent/GB1424161A/en
Priority to IT47569/74A priority patent/IT1008666B/it
Priority to DE2400745A priority patent/DE2400745A1/de
Priority to JP670674A priority patent/JPS5722622B2/ja
Priority to FR7401196A priority patent/FR2213811B3/fr
Application granted granted Critical
Publication of US3807641A publication Critical patent/US3807641A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
    • B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
    • B05B7/1272—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated actuated by gas involved in spraying, i.e. exiting the nozzle, e.g. as a spraying or jet shaping gas
    • B05B7/1281—Serial arrangement, i.e. a single gas stream acting on the controlling means first and flowing downstream thereof to the nozzle

Definitions

  • a spray head comprises a body having air and liquid inlet passageways terminating adjacent to each other within the body.
  • a single resilient diaphragm is disposed across the ends of the two passageways and sealed against a seat at the end of the liquid inlet passageway.
  • the diaphragm is held against the seat by a spring biased piston, and the diaphragm is raised from the seat by air pressure in the air inlet line.
  • the air and liquid are mixed in a mixing cavity immediately under the diaphragm, and the mixture is discharged through an outlet passageway to a spray nozzle.
  • the spray nozzle may be a ba11-shaped member formed with a variety of openings to provide various discharge patterns.
  • Spray heads with which the present invention is concerned is that used for spraying lubricants or mold release agents into the cavities of casting dies.
  • Spray heads of this type typically contain a body with airand liquid-inlet lines, and suitable valving within the body to control the air, wherebythe air pressure is used to deliver the liquid to a spray nozzle.
  • the mixing of the air and liquid generally takes place in a discharge nozzle so that an atomized spray is discharged for impingement upon the surface to be lubricated.
  • the aforesaid valving frequently consists of a ball check valve, needle valve or the like, all of which may be subject to deterioration and/or clogging during use.
  • the spray nozzles themselves are often designed for only a fixed or predetermined spray pattern, which may not be satisfactory for all uses. If the nozzle is designed for various spray patterns, the adjustment features of the nozzle result in additional costs and complications.
  • An object of this invention is to provide a spray head of the type and for the purpose statedin which the airinlet passageway and the liquid-inlet passageway extend into the body of the spray head, and wherein the sealing means across the end of the liquid-inlet passageway consists of a single resilient diaphragm.
  • a further and important object of this invention is to provide a spray head of thetype stated in which the air and liquid are mixed in a mixing cavity defined in part by the diaphragm and immediately adjacent to the terminals of the air-inlet and liquid-inlet passageways.
  • the mixed air/liquid is discharged through an outlet passageway downstream of the mixing cavity to a nozzle from which the spray is ultimately discharged.
  • the design' of the nozzle may be simplified and adapted to a wide variety of spray patterns since the nozzle is not depended upon formixing.
  • An additional object of this invention is to provide a spray head of the type stated which may be disassembled for service without the need for tools, and wherein the diaphragm and its seat across the terminal of the liquid-inlet passageway are so designed that contaminants may flow through the spray head without immediately eroding the seal or preventing the seal from functioning, thereby reducing the need for frequent disassembly of the spray head for maintenance purposes.
  • a still further object of this invention is to provide a spray headof the type stated that utilizes a ball-swivel nozzle that can be rotated to various positions for discharging different spray patterns, such as a fine or wide conical pattern, a hollow conical pattern, fan shaped spray, or the like.
  • a still further object of this invention is to provide a spray head of the type stated in which the diapharagm mounting is such as to permit ready removal of the diaphragm so that it may be turned over in the eventthat the side of the diaphragm that is exposed to the flowing stream becomes partially eroded and tends to capture particles. In effect this tends to'double the Med the diaphragm before the need for replacement thereof.
  • the invention comprises a spray head having a body with air-inlet and liquid-inlet passageways terminating adjacent to each other within'the body and with the end liquid-inlet passageway forming a metal'seat.
  • a flexible diaphragm is disposed across the seat, and a spring-biased piston imposes pressure upon the diaphragm to maintain the latter sealed against the seat until air of sufficient air pressure in the air-inlet passageway raises the diaphragm from the seat.
  • a mixing chamber or cavity underlies the diaphragm and is thus defined in part by the diaphragm.
  • the outlet passageway downstream of the mixing cavity conveys the air/liquid mixture from the mixing cavity to the spray nozzle.
  • FIG; 1 is a fragmentary view partially broken away and in section of a spray head constructed in accordance with and embodying the present invention
  • FIG. 2 is another fragmentary perspective view partially brokenaway and in section of the spray head
  • FIG. 3 is an exploded perspective view of the spray head, more particularly a dual-nozzle type spray head
  • FIG. 4' is a sectional'view through the central axis of one type of spray nozzle that forms part of the present invention.
  • FIG. 5 is an end view of the nozzle of FIG. 4;
  • FIG. 6 shows a sectional view of a modified form of spray nozzle
  • FIG. 7 is an end view of the nozzle of FIG. 6;
  • FIG. 8' shows a sectional view of a still further form of spray nozzle
  • FIG. 9 is an end view of the nozzle of FIG. 8.
  • FIG. 10 is an exploded. fragmentary perspective view of the spray head showing but still a further form of spray nozzle arrangement.
  • a metal housing or body 1 which is preferably of generally block-like form.
  • a and L airand liquid-inlet openings marked A and L and into which conventional threaded fittings may be inserted whereby air and liquid under pressure may be supplied to the spray'head.
  • drilled passageway 3 In communication with the recessed or bottom end of the liquidinlet opening L is drilled passageway 3 that terminates within the body in a seat 5.
  • the lower or recessed end of the opening A isin communication with a drilled passageway 7 that terminates within the body 1 adjacent to but radially offset from the seat 5.
  • a tubular cylindrical flange 9 that is coaxial with the axis of the drilled passageway 3 in the region of the seat 5.
  • the flange 9 is also large enough in internal diameter to embrace the terminal part of the passageway 7.
  • the flange 9' is internally threaded for receiving a cylindrical, externally threaded diaphragm retainer ring 11.
  • the diaphragm retainer 11 clinches the peripheral portion of the diaphragm against the shoulder 13 to form a seal thereat. It is, therefore, apparent that the diaphragm 15 constitutes a membrane-like seal or barrier that .prevents air and liquid from flowing therepast.
  • Axially slidable within the diaphragm retainer 11 is a piston 17 that presses against the diaphragm 15 to urge it into sealing position across the seat 5, thereby normally closing off the end of the passageway 3.
  • the diaphragm is large as compared to the opening at the seat.
  • the piston 7 has a machined shoulder 19 that receives the inside surface of a cap 21, and the stem 23 of the piston 17 projects slidably through a central hole 25 in the cap'21.
  • the cap 21 has an external knurl to facilitate manual manipulation, and is internally threaded for threading onto the external thread of the flange 9. 1
  • a coil compression spring 27 which bears at one end against the inside of theend wall of the cap. 21 and at its other end against the head of the piston 17.
  • the coil spring 27 surrounds the stem of the piston and, like the piston, is coaxial with the diaphragm 15.
  • the cap contains a subassembly comprising the piston 17 and the spring 7. This subassembly is held together by a push nut 29 that frictionally fits over the end of the piston stem 23.
  • the amount of pressure on the piston 17 imposed by the spring 27 determines the maximum liquid holding pressure of the unit and the air pressure needed to lift the diaphragm 15 from across the seat 5.
  • the piston 17 has a limited axial movement in accordance with its setting.
  • the piston 17 can be set to provide controlled liquid flow or complete shut-off of the liquid.
  • An annular machined cavity 31 underlies the diaphragm l5 and provides communication from the passageway 7 to the large underside of the diaphragm surrounding the seat 5.
  • the nozzle assembly comprises a ball-nozzle 37 that is supported by a tubular nozzle seat 39.
  • the nozzle seat 39 is sealed within the hole 35 by an O-ring 41.
  • An externally threaded nozzle retainer 43 receives the nozzle 37 whereby a portion of the nozzle projects outwardly therefrom for presentation to the die cavity or other surface to be sprayed.
  • the nozzle retainer 43 has a knurled periphery to facilitate manual manipulation.
  • the ball nozzle 37 is seated in place and the seal 41 prevents escape of the air-liquid mixture around the threads of the hole 35 and the nozzle retainer 43.
  • the nozzle 37 may be'manually rotated for optional positioning with out disassembling the nozzle assembly. To accomplish this the retainer 43 may be loosened slightly to permit movement of the nozzle 37 when it is desired to adjust its position.
  • FIGS. 4-9 show a variety of nozzles which may be used with the present invention.
  • the nozzle 37 shown in FIGS. 4 and 5 one end portion 45 of the nozzle is conical while the other portion 47 is cylindrical.
  • the conical portion 45a is somewhat wider than the conical portion 45, and the opposite end of the bore of the nozzle 37a has a series of circumferentially spaced small holes 49.
  • the nozzle 37b the nozzle has a fan shaped slot 52 that is opposite to the conical portion 45.
  • Other nozzle outlet configurations may also be used.
  • there is a wide variety of nozzles any of which may be readily installed on the spray head, may be used to provide the desired spray pattern.
  • the nozzle comprises an adapter 53 that threads into the hole 35 and is retained by a locking ring 57.
  • a metal-to-metal seal may be provided by the adapter fitting 53 and the thread in the hole 35.
  • a T-fitting 59 has a stem 61 which is threaded into the internally threaded bore 63 of the adapter and forms a seal therewith.
  • the T-fitting 59 has opposed tubes 65, 65 which may be positioned so as to direct sprays from each of the tubes intodifferent portions of die cavities of relatively complex configuration. Such an arrangement tends to reduce the total number-ofspray heads used in some situations.
  • the T-fitting may be replaced by a single tube or other standard fittings such as a 45 fitting, a fitting or a Y-type fitting. These are by the way of example only and not by way of limitation.
  • the diaphragm mechanism of the presentinvention provides effective metering as a result of the small diameter supply port at the seat 5 and the limited movement of the diaphragm 15.
  • the thin sheet-like flow of the liquid in the mixing chamber together with the turbulent air therethrough provides excellent atomizing even for relatively viscous fluids.
  • the flow rateprovided by the limited axial movement of the diaphragm can be easily adjusted by the threaded setting of the cap 21 on the flange 9 to control the axial movement of the piston 17.
  • This setting establishes the distance between the shoulder 19 and the inside wall of the cap 21 and thus mechanically controls diaphragm movement.
  • variations in air pressure above the minimum needed to lift the diaphragm from the seat 5 will have no significant effect on diaphragm movement. Such variations in pressure serve to control the degree of atomization and the velocity of the discharged liquid particles.
  • a spray head comprising a body having an air-inlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of said air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient imperforate diaphragm disposed across said seat and the terminal of said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the airinlet passageway to raise the diaphragm from said seat, said liquid inlet passageway being free of said springbiased member, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said airinlet passageway to raise said diaphragm from said seat, said diaphragm being secured around its entire periphery to constitute a membrane-like'barrier preventing flow of liquid and air therepast from said mixing cavity,
  • a spray head comprising a body having anair-inlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of said air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient diaphragm disposed across said seat and the terminal of said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the air-inlet passageway to raise the diaphragm from said seat, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said air-inlet passageway to raise said diaphragm from said seat, an outlet passageway downstream of said mixing cavity for conveying an air-liquid mixture from said mixingcavity, and a nozzle in communication with said outlet passageway for spraying the mixture conveyed thereto; and in which said diaphragm is
  • a spray head according to claim 1 in which the terminal of the liquid-inlet passageway is small in crosssectional area as compared to the cross-sectional area of the face of the diaphragm that is presented thereto.
  • a spray head in which said nozzle comprises swivelly mounted ball member having an opening therethrough, one end portion of the opening being conical, and an'opposite end portion being of different shape whereby the ball member may be op- I terminal of said air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient diaphragm disposed across said seat'and the terminal of .said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the air-inlet passageway to raise the diaphragm from said seat, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said air-inlet passageway to raise said diaphragm from said seat, an outlet passageway downstream of said mixing cavity for conveying an air-liquid mixture from said mixing cavity, and a nozzle in communication with said outlet
  • a spray head comprising a body having an air-inlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of said air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient diaphragm disposed across said seat and the terminal of said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absenceof sufficient air pressure in the air-inlet passageway to raise the diaphragm from said seat, a diaphragm seat in said body and supporting th'e'periphery of said diaphragm, a clamping ring removably secured to said body and imposing pressure against said diaphragm to seal the diaphragm in place on said seat, a mixing cavity defined in part by said diaphragm and exposed to both -of said passageway terminals upon sufficient air pressure being in said air-inlet
  • a spray head according to claim 8 in which said spring-biased means is within said clamping ring.
  • a spray head comprising a body having an airinlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of said air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient diaphragm disposed across said seat and the terminal of said air-inlet passageway, a springbiased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the air-inlet passageway to raise the diaphragm from said-seat, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said air-inlet passageway to raise said diaphragm from said seat, said diaphragm being an imperforate member-like member having opposed sides of such configuration as to be operable when either side is exposed to the air-liquid mixture, means removably mounting said diaphragm in said body so that upon

Landscapes

  • Nozzles (AREA)
  • Casting Devices For Molds (AREA)
US00323890A 1973-01-15 1973-01-15 Spray head Expired - Lifetime US3807641A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00323890A US3807641A (en) 1973-01-15 1973-01-15 Spray head
CA189,202A CA990763A (en) 1973-01-15 1973-12-31 Spray head
GB49974A GB1424161A (en) 1973-01-15 1974-01-04 Spray heads
IT47569/74A IT1008666B (it) 1973-01-15 1974-01-08 Perfezionamento nelle teste di spruzzatura in particolare per spruzzare lubrificanti o agenti di distacco per stampi di fusione
DE2400745A DE2400745A1 (de) 1973-01-15 1974-01-08 Spruehkopf
JP670674A JPS5722622B2 (enrdf_load_stackoverflow) 1973-01-15 1974-01-14
FR7401196A FR2213811B3 (enrdf_load_stackoverflow) 1973-01-15 1974-01-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00323890A US3807641A (en) 1973-01-15 1973-01-15 Spray head

Publications (1)

Publication Number Publication Date
US3807641A true US3807641A (en) 1974-04-30

Family

ID=23261157

Family Applications (1)

Application Number Title Priority Date Filing Date
US00323890A Expired - Lifetime US3807641A (en) 1973-01-15 1973-01-15 Spray head

Country Status (7)

Country Link
US (1) US3807641A (enrdf_load_stackoverflow)
JP (1) JPS5722622B2 (enrdf_load_stackoverflow)
CA (1) CA990763A (enrdf_load_stackoverflow)
DE (1) DE2400745A1 (enrdf_load_stackoverflow)
FR (1) FR2213811B3 (enrdf_load_stackoverflow)
GB (1) GB1424161A (enrdf_load_stackoverflow)
IT (1) IT1008666B (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365754A (en) * 1980-06-19 1982-12-28 Acheson Industries, Inc. Spray assembly construction
US4567912A (en) * 1984-07-30 1986-02-04 Acheson Industries, Inc. Multiple spray nozzles
USD285596S (en) 1984-01-09 1986-09-09 Champion Spark Plug Company Robot mounted spray gun
US4714199A (en) * 1986-05-09 1987-12-22 Heath Allan B Liquid atomizing nozzle for spray apparatus
US5799876A (en) * 1995-05-31 1998-09-01 Martin Marietta External mixed plural component spray gun
CN112059126A (zh) * 2020-08-11 2020-12-11 繁昌县琪鑫铸造有限公司 一种铸造流涂设备

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1034808B (it) * 1975-04-03 1979-10-10 Taccon Danizzo Nbebulizzatore per fluidi a pressione atmosferica o sotto pressione ad intercettazione automatica pneumatica
US4396529A (en) 1978-11-13 1983-08-02 Nordson Corporation Method and apparatus for producing a foam from a viscous liquid
JPS5728605A (en) * 1980-06-11 1982-02-16 Loewy Robertson Eng Co Ltd Spray unit for rolling mill
US5480589A (en) * 1994-09-27 1996-01-02 Nordson Corporation Method and apparatus for producing closed cell foam

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596687A (en) * 1948-10-26 1952-05-13 Hill Hugh Francis Humidifier head
US2639194A (en) * 1950-12-21 1953-05-19 Spraying Systems Co Antidrip valve for spray nozzles

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365754A (en) * 1980-06-19 1982-12-28 Acheson Industries, Inc. Spray assembly construction
USD285596S (en) 1984-01-09 1986-09-09 Champion Spark Plug Company Robot mounted spray gun
US4567912A (en) * 1984-07-30 1986-02-04 Acheson Industries, Inc. Multiple spray nozzles
US4714199A (en) * 1986-05-09 1987-12-22 Heath Allan B Liquid atomizing nozzle for spray apparatus
US5799876A (en) * 1995-05-31 1998-09-01 Martin Marietta External mixed plural component spray gun
CN112059126A (zh) * 2020-08-11 2020-12-11 繁昌县琪鑫铸造有限公司 一种铸造流涂设备

Also Published As

Publication number Publication date
GB1424161A (en) 1976-02-11
FR2213811B3 (enrdf_load_stackoverflow) 1978-03-10
IT1008666B (it) 1976-11-30
CA990763A (en) 1976-06-08
JPS49109218A (enrdf_load_stackoverflow) 1974-10-17
JPS5722622B2 (enrdf_load_stackoverflow) 1982-05-14
FR2213811A1 (enrdf_load_stackoverflow) 1974-08-09
DE2400745A1 (de) 1974-07-18

Similar Documents

Publication Publication Date Title
US3561680A (en) Spray head assembly
US5209405A (en) Baffle for hvlp paint spray gun
US4171096A (en) Spray gun nozzle attachment
US4989787A (en) Liquid spray gun accessories
US5090623A (en) Paint spray gun
US4911365A (en) Spray gun having a fanning air turbine mechanism
US5190219A (en) Automatic spray gun
US4899937A (en) Convertible spray nozzle
US3632046A (en) Spray nozzle
US6089471A (en) Fluid spray gun
US4537357A (en) Spray guns
US3807641A (en) Spray head
US5618001A (en) Spray gun for aggregates
CA2061840A1 (en) Pressure compensated hvlp spray gun
US4123007A (en) Valve assembly and spraying apparatus therefor
JPH04271860A (ja) コーン形空気霧化ノズル　アセンブリ
US5067518A (en) Pressure feed paint cup valve
US3394888A (en) Dispensing gun
US4899938A (en) Liquid spray nozzle adapter
US3112884A (en) Spraying device
US4650119A (en) Air spray gun
US3190564A (en) Spray coating apparatus for spraying liquid coating material under high pressure
US2244159A (en) Nozzle
US3608832A (en) Spray nozzle assembly operable at low pressure
WO2000023196A2 (en) Modular fluid spray gun for air assisted and airless atomization