US3719325A - Nozzle for a pneumatic-hydraulic head for cleaning of molds for pressure casting of metal - Google Patents

Nozzle for a pneumatic-hydraulic head for cleaning of molds for pressure casting of metal Download PDF

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Publication number
US3719325A
US3719325A US00164578A US3719325DA US3719325A US 3719325 A US3719325 A US 3719325A US 00164578 A US00164578 A US 00164578A US 3719325D A US3719325D A US 3719325DA US 3719325 A US3719325 A US 3719325A
Authority
US
United States
Prior art keywords
nozzle
nozzle body
channel
head
separating material
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
US00164578A
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English (en)
Inventor
A Cerva
M Tomasovic
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.)
VYSKUMNY USTAV MECHANIZACIE A AUTOMATIZACIE
Original Assignee
Vyzk Ustav Mech
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 Vyzk Ustav Mech filed Critical Vyzk Ustav Mech
Application granted granted Critical
Publication of US3719325A publication Critical patent/US3719325A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2084—Manipulating or transferring devices for evacuating cast pieces
    • 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
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
    • B05B7/0466—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber with means for deflecting the central liquid flow towards the peripheral gas flow
    • 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
    • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding
    • B22C23/02—Devices for coating moulds or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2007—Methods or apparatus for cleaning or lubricating moulds

Definitions

  • This invention relates to the arrangement of a spray nozzle particularly adapted for cleaning of molds for pressure casting of metal in a pressure casting machine and for applying a layer of separating material on the surface of the mold.
  • the molds of similar casting machines are generally composed of two halves which are closed for casting. The molten metal is introduced under pressure into the hollow space of the closed mold.
  • the mold After the metal has solidified, the mold is opened and the casting removed. It is however frequently necessary to clean both parts of the mold between successive casting operations and to remove, above all, the burn-off.
  • separating material which operate satisfactorily only when using high grade separating material.
  • the liquid separating material is stored in a container, wherefrom it passes due to the application of a vacuum caused by the flow of pressurized air with which it mixes. Pressurized air is generally caused to flow around the outlet of the separating material and by adjustment of its volume and by adjustment of the size of the nozzle the ratio of the mixture of air and separating material can be adjusted.
  • a drawback of this arrangement is that the mixture is collects on the wall of the discharge tube and causes drops of the liquid separating material to fall on the surface of the mold at places where they are undesirable.
  • a further drawback is also in the fact that such apparatus cannot be used to clean the mold with pressurized air only, and must simultaneously apply the separating material.
  • Another arrangement which operates so, that the separating material is mixed with the air just prior to application on the surface of the mold.
  • Pressurized air is supplied around the supply tube for the separating material, which is coaxial with the axis of the nozzle.
  • the stream of air passing through a conical annular space comes to the outlet of the nozzle and strikes the surface of the mold.
  • the proper application of the separating material is accomplished by dosing means which supplies a predetermined amount of liquid separating material at a certain time interval into the nozzle where it is taken along by the stream of air and applied on the surface of the mold.
  • a drawback of this arrangement is that the speed of the streaming air is partially throttled in the supply ports, so that the proper mixing of the separating material with air in the nozzle is not perfect.
  • a drawback lies also in the complicated assembling of this arrangement.
  • At least one mixing channel is provided in the external surface of the nozzle body.
  • the nozzle body is provided with a transfer channel, terminating therein, and interconnecting a central hollow space in the nozzle body with a chamber in the nozzle head, the transfer channel being inclined with respect to the axis of the nozzle.
  • An advantage of the nozzle according to this invention is, that a rotational movement of the air stream is accomplished by the passage of the pressurized air through the mixing channels in the nozzle body, achieving thus an improved cleaning of the molds.
  • Another advantage is, that the liquid separating material is taken along into the mixing channel by a branch of the stream, creating a vortex in the nozzle, whereby a perfect mixing of the mixture is achieved.
  • Another advantage is, that the mixture can within very short time intervals be applied in a uniform layer to the surface of the mold.
  • FIG. 1 shown the whole head in longitudinal cross section
  • FIG. 2 an elevation of the proper nozzle body and FIG. 3 a longitudinal cross section of the nozzle body.
  • the nozzle body 2 is formed with four mixing channels 11 (see FIGS. 2 and 3) provided on its external circumference. These mixing channels extend in a spiral direction from the external surface to the center of the nozzle body 2.
  • the axis of this transfer channel 5 is inclined with respect to the longitudinal axis of the nozzle body.
  • the nozzle body 2 is placed in the body 1 of an enlarged hollow nozzle head so as to create between the nozzle body 2 and the body 1 of the nozzle head an annular chamber 10.
  • This chamber 10 is connected by means of a channel 9 in the body 1 of the nozzle head with a source of pressurize air.
  • the nozzle body 2 is fixed in the body 1 of the nozzle head by a hood 6, creating above the nozzle body 2 a second chamber 12, terminating in the nozzle spout 8.
  • the separating material is supplied to the central hollow space 4 of the nozzle body 2 via a supply channel 7 and a filter screen 3 under an overpressure.
  • the pressurize air is supplied by way of a channel 9 in the body 1 of the nozzle head into the annular chamber 10 and passes over the spiral shaped mixing channels 11.
  • the separating material mixes with pressurized air as it leaves the transfer channel 5 and is carried along by air passing through the mixing channels 11. A thorough mixing is thereby accomplished with the pressurized air supplied via the annular chamber 10.
  • the separating material is atomized by the vortex created by the atomized air as it passes through chamber 12, and exits through the nozzle spout 8 to be applied on the surface of the mold.
  • Both supply channels 7 and 9 have independently controlled control means, advantageously controlling the supply of the pressurized air and of the separating material.
  • a spray nozzle comprising in combination:
  • a nozzle hood enclosing said nozzle body and provided with a nozzle spout
  • At least one mixing channel formed on the external surface of said nozzle body and communicating with said spout
  • said nozzle body and said nozzle head be arranged to provide an annular space coaxial with the longitudinal axis of the nozzle head and terminating in said mixing channel,
  • a transfer channel interconnecting the central hollow space of the nozzle body with said mixing channels.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
US00164578A 1970-08-14 1971-07-21 Nozzle for a pneumatic-hydraulic head for cleaning of molds for pressure casting of metal Expired - Lifetime US3719325A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS5644A CS148180B1 (enrdf_load_stackoverflow) 1970-08-14 1970-08-14

Publications (1)

Publication Number Publication Date
US3719325A true US3719325A (en) 1973-03-06

Family

ID=5401670

Family Applications (1)

Application Number Title Priority Date Filing Date
US00164578A Expired - Lifetime US3719325A (en) 1970-08-14 1971-07-21 Nozzle for a pneumatic-hydraulic head for cleaning of molds for pressure casting of metal

Country Status (3)

Country Link
US (1) US3719325A (enrdf_load_stackoverflow)
CS (1) CS148180B1 (enrdf_load_stackoverflow)
DE (1) DE2140758A1 (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD251499S (en) 1976-10-07 1979-04-03 Airprint Systems, Inc. Spray head
US4361285A (en) * 1980-06-03 1982-11-30 Fluid Kinetics, Inc. Mixing nozzle
US4462543A (en) * 1981-12-24 1984-07-31 The Procter & Gamble Company Nozzle
DE3423373A1 (de) * 1983-08-29 1985-03-07 Institut für Getreideverarbeitung im VEB Kombinat Nahrungsmittel und Kaffee, DDR 1505 Bergholz-Rehbrücke Duese zur zerstaeubung viskoser fluessigkeiten
EP0747115A3 (en) * 1995-06-05 1997-07-16 Gen Electric Spray granulation nozzle
US5893380A (en) * 1996-02-23 1999-04-13 Samsung Electronics Co., Ltd. Method for cleaning molding compound tablets
EP1516686A3 (en) * 2003-09-16 2005-08-24 Loramendi, S.A. Ejector device for core box with distribution of demoulding agent
CN111168032A (zh) * 2020-01-20 2020-05-19 宜宾职业技术学院 一种压铸模具缓冲机构

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2189147A1 (en) * 1972-06-20 1974-01-25 Santo Marchese Foundry mould cleaner and talc applicator - appts acts simultaneously and reduces talc consumption

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2878065A (en) * 1956-07-23 1959-03-17 Lucas Industries Ltd Liquid fuel discharge nozzles
US2895685A (en) * 1956-02-29 1959-07-21 Vilbiss Co Spray nozzle
US3163362A (en) * 1963-02-04 1964-12-29 Max R Mcfee Spray device having outer and interior tubular construction
US3332231A (en) * 1964-05-07 1967-07-25 Gulf Research Development Co Aspirator for use in a flowing gas stream
US3512719A (en) * 1968-04-05 1970-05-19 Morton E Phelps Siphon nozzle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2895685A (en) * 1956-02-29 1959-07-21 Vilbiss Co Spray nozzle
US2878065A (en) * 1956-07-23 1959-03-17 Lucas Industries Ltd Liquid fuel discharge nozzles
US3163362A (en) * 1963-02-04 1964-12-29 Max R Mcfee Spray device having outer and interior tubular construction
US3332231A (en) * 1964-05-07 1967-07-25 Gulf Research Development Co Aspirator for use in a flowing gas stream
US3512719A (en) * 1968-04-05 1970-05-19 Morton E Phelps Siphon nozzle

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD251499S (en) 1976-10-07 1979-04-03 Airprint Systems, Inc. Spray head
US4361285A (en) * 1980-06-03 1982-11-30 Fluid Kinetics, Inc. Mixing nozzle
US4462543A (en) * 1981-12-24 1984-07-31 The Procter & Gamble Company Nozzle
DE3423373A1 (de) * 1983-08-29 1985-03-07 Institut für Getreideverarbeitung im VEB Kombinat Nahrungsmittel und Kaffee, DDR 1505 Bergholz-Rehbrücke Duese zur zerstaeubung viskoser fluessigkeiten
EP0747115A3 (en) * 1995-06-05 1997-07-16 Gen Electric Spray granulation nozzle
US5893380A (en) * 1996-02-23 1999-04-13 Samsung Electronics Co., Ltd. Method for cleaning molding compound tablets
US6023853A (en) * 1996-02-23 2000-02-15 Samsung Electronics Co., Ltd. Method for cleaning molding compound tablets
EP1516686A3 (en) * 2003-09-16 2005-08-24 Loramendi, S.A. Ejector device for core box with distribution of demoulding agent
CN111168032A (zh) * 2020-01-20 2020-05-19 宜宾职业技术学院 一种压铸模具缓冲机构

Also Published As

Publication number Publication date
DE2140758A1 (enrdf_load_stackoverflow) 1972-05-25
CS148180B1 (enrdf_load_stackoverflow) 1973-02-22

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