US3797709A - Volumetric metering apparatus - Google Patents

Volumetric metering apparatus Download PDF

Info

Publication number
US3797709A
US3797709A US00271189A US3797709DA US3797709A US 3797709 A US3797709 A US 3797709A US 00271189 A US00271189 A US 00271189A US 3797709D A US3797709D A US 3797709DA US 3797709 A US3797709 A US 3797709A
Authority
US
United States
Prior art keywords
plunger
space
compressed gas
communicating
face
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
US00271189A
Other languages
English (en)
Inventor
A Ivanovich
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3797709A publication Critical patent/US3797709A/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
    • B05B7/0006—Spraying by means of explosions
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/04—Impact or kinetic deposition of particles
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/126—Detonation spraying
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/10—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation
    • G01F11/12—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements
    • G01F11/14—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber reciprocates
    • G01F11/18—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber reciprocates for fluent solid material

Definitions

  • An apparatus comprising a cylindrical body housing a plunger having a measuring space which, as the plunger is moved by compressed gas, in one of its extreme positions communicates with a feed hopper, while in the other extreme position of the plunger, the measuring space communicates simultaneously with a discharge standpipe and a plenum space in the body in order that the metered material may be blown out of the measuring space by com- .pressed gas.
  • This invention relates generally to an apparatus for transferring, in metered quantities and at a high rate, liquid and finely divided solid materials from one pressure-temperature zone to a zone of higher pressure and temperature, and more particularly to a volumetric metering apparatus.
  • solid materials raw material and catalyst
  • a suitable liquid regulator agitated to fonn a desired paste which is then injected in metered amounts into the reaction zone of high pressure and temperature.
  • This invention may be most successfully employed in apparatus for explosion treatment of materials, in particular for applying by explosion protective coats of both refractory and low-temperature materials.
  • metering devices of various purposes, such as star feeders, multiple high pressure lock hoppers, all of which supply the material in metered quantities to the reaction zone.
  • Such devices comprise a casing wherein there is a plunger member coupled with a mechanical or other type of drive means by way of a coupling member.
  • the charged material is fed by compressed air to a measuring space defined between the end of the casing and the end of the plunger member.
  • the transfer of a metered amount of the finely divided solid material to-the reaction zone consists in a longitudinal displacement of the plunger, with air from a separate source being simultaneously blown in through annular passages disposed betweenthe casing and the plunger.
  • the plunger is retracted to its feed (or discharge) position by a special drive means (cf U.S. Pat. No. 3,400,985).
  • a serious disadvantage of such apparatus is their inability to provide an adequate degree of precision in material metering insofar as the measuring space design features permit a certain quantity of material to stay in it after discharge in spite of an arrangement for additional scavenging of the measuring space.
  • Yet another disadvantage of such devices is their complex design which includes additional intermediate members to compensate for the coupling rod displacement arising while the plunger is in motion.
  • Still another disadvantage consists in that the considerable number of mechanical elements required by the construction of such devices reduces their overall reliability.
  • a volumetric metering apparatus comprising a hollow cylindrical body communicating with a feed hopper and with a discharge standpipe, wherein compressed air imparts a reciprocal motion to a plunger transferring thereby a quantity of the material which fills the measuring space.
  • the measuring space is provided in the plunger such that in one of the latter's extreme positions it communicates with the feed hopper and is charged, while in the other extreme position of the plunger stuffing box the measuring space communicates simultaneously with the discharge standpipe and with a plenum space of the cylinder, wherefrom compressed air is supplied to blow the material from the measuring space into the discharge standpipe.
  • the plenum space of the clylinder should communicate, via a conduit, with a through passage in the cylinder body aligned with the discharge standpipe hole.
  • the measuring space should be T-shaped, with one end thereof communicating at the instant of charging with the feed hopper, while the other two ends of the T-shaped measuring space communicate at the instant of discharging with passages in the body of the cylinder communicating, one with the plenum space, the other with the discharge standpipe.
  • Such an embodiment allows precise material metering, strict fixation of a batch in the measuring space, as well as displacement and blowing out of the batch into the discharge standpipe with compressed gas from one source.
  • bushings fitted into the cylinder ends to limit the extreme positions of the plunger and having passage means for the supply and venting of compressed gas.
  • the cylinder space opposite the plenum space may be fitted with a spring retracting and fixing the plunger in the charging position.
  • the cylinder space housing the spring may periodically communicate with the compressed air source.
  • FIG. 1 is a schematic representation of a volumetric metering apparatus in accordance with the present invention
  • FIG. 2 is a longitudinal section of the apparatus of FIG. 1 in the charging position
  • FIG. 3 is a sectional view taken along the line III-Ill of FIG. 1;
  • FIG. 4 is a longitudinal section of the apparatus of FIG. 1 in the discharging position.
  • the apparatus is intended for volumetric metering of, above all, finely divided powdered materials in installations requiring accurate batching and subsequent transfer of the batch to the reaction chamber of high pressure and temperature.
  • the apparatus comprises a gas-tight hollow cylindrical body 1 closed at both ends (FIG. 1) housing a plunger whereto compressed gas imparts a reciprocal motion.
  • a feed hopper 3 and a discharge standpipe 4 which communicate in common with the inner space of the body I are mounted on the cylindrical part of the body 1, with the standpipe 4 being disposed in a plane normal to the axis of the feed hopper 3 (in FIG. 2 the standpipe 4 is shown superposed on the drawing plane).
  • the plunger 2 divides the inner space of the body 1 into two spaces: A plenum space 5 whereto compressed gas is supplied, and an opposite space 6 which houses a spring 7 one end whereof rests against an end 8 of the body 1, while the other end of the spring rests against an annular recess 9 on end 10 of the plunger 2.
  • the plenum space 5 via an annular conduit 12 fitted in a hole 11 of the body 1 (conduit 12 in FIG. 2 is shown turned), communicates with a through passage 13 in the body 1 which is aligned with an inlet hole 14 of the discharge standpipe 4.
  • a changeable bushing 31 is fitted in a feed line 3a of the hopper 3.
  • the batch size can be varied by choosing bushings 3b of an appropriate diameter.
  • a T-shaped measuring space 15 (FIG. 3) defined by two intercommunicating passages: a diametrical through passage 16 and a radial passage 17 perpendicular thereto, is formed in the plunger 2.
  • the radial passage 17 of the measuring space 15 at the charging instant communicates with thefeed line 30 of the hopper 3, whereas the diametrical passage 16 of the measuring space 15 at the instant of discharging (FIG. 4) communicates by way of one end 18 thereof (FIG. 3) with the passage 13 (FIG. 2) in the body 1 and via the annular conduit 12 with the plenum space 5, while communicating by way of the other end 19 thereof (FIG. 3) with the inlet hole 14 (FIG. 2) of the discharge standpipe 4.
  • Ends 20 and 8 of the body 1 are fitted with bushings 21 and 22 which define with their inner end faces the extreme positions of the plunger 2 and which have passages 23 and 24 for the supply and venting of compressed gas.
  • the hole 11 of the annular conduit 12 can be seen to be located at a distance equal to the length of the stroke from the inner end face of bushing 22. This distance is indicated by h. Passage 13 of the annular conduit 12 is also located at a distance equal to 3 times the length of the stroke of the plunger from the inner end face of bushing 22.
  • the apparatus is actuated by compressed gas supplied from a source 25 through pipes 26 fitted with electromagnetic control valves 27 and 28.
  • the feed delivery pipes 26 carry compressed gas to the plenum space 5 and to the space 6 of the body I. while through vent pipes 29 exhaust gas escapes into the atmosphere.
  • the volumetric metering apparatus disclosed herein operates on the following principle.
  • the plunger 2 In the initial position (at the instant of charging), the plunger 2 is in the extreme left position (FIG. 2) at the end 20 of the body 1 wherein it is fixed by the spring 7. In this position, the measuring space 15 is aligned by way of its passage 17 with the feed line 3a of the hopper 3 and is filled with a batch of material A.
  • the plunger stuffing box 2 starts moving to the right until it leans against the end of the bushing 22, thereby compressing the spring 7 and letting the gas from the space 6 of the body 1 escape into the atmosphere through the electromagnetic valve 28.
  • the measuring space 15 will get aligned by way of its passage 16 with the annular conduit 12 and the discharge standpipe 4.
  • the plunger 2 opens the hole 11 in the body 1, compressed air will rush at a great velocity into the annular conduit 12 and blow the powder from the measuring space 15 into the discharge standpipe 4.
  • valve 27 closes, switching to a draining mode, while the valve 28 opens, thereby letting compressed gas into the space 6 of the body 1.
  • the measuring space 15 is again aligned by way of the passage 17 with the feed line 33a of the hopper 3, whereupon the above-described cycle is repeated.
  • a volumetric metering apparatus comprising:
  • a plunger disposed in the inner space of said body and dividing the same into two plenum spaces communicating with a source of compressed gas, said plunger being reciprocated within the inner space of said body under the effect of the compressed gas applied into said plenum spaces of said body;
  • a feed hopper communicating with the inner space of said body and mounted thereon at a distance from one of the inner end faces thereof which is equal to twice the length of the stroke of said plunger;
  • a measuring space defined in said plunger so that in one of its extreme positions at said inner end face that communicates with said feed hopper wherecommunicating at the moment of discharging with the plenum space located at said inner end face of said body by means of said arcuate pipe at one end, while the other end communicates with the discharge pipe, said radial passage of said measuring space being disposed normally through said diametrical passage and from it is charged, while in the other extreme posicommunicating with said hopper at the moment of charging.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Fluid Mechanics (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Nozzles (AREA)
US00271189A 1971-07-12 1972-07-12 Volumetric metering apparatus Expired - Lifetime US3797709A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1675700 1971-07-12

Publications (1)

Publication Number Publication Date
US3797709A true US3797709A (en) 1974-03-19

Family

ID=20481050

Family Applications (2)

Application Number Title Priority Date Filing Date
US00271189A Expired - Lifetime US3797709A (en) 1971-07-12 1972-07-12 Volumetric metering apparatus
US00271202A Expired - Lifetime US3773259A (en) 1971-07-12 1972-07-12 Installation for detonation working of materials

Family Applications After (1)

Application Number Title Priority Date Filing Date
US00271202A Expired - Lifetime US3773259A (en) 1971-07-12 1972-07-12 Installation for detonation working of materials

Country Status (6)

Country Link
US (2) US3797709A (enrdf_load_stackoverflow)
CS (2) CS156046B1 (enrdf_load_stackoverflow)
DD (2) DD97869A1 (enrdf_load_stackoverflow)
FR (2) FR2151840A5 (enrdf_load_stackoverflow)
HU (1) HU165107B (enrdf_load_stackoverflow)
IT (2) IT961343B (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913795A (en) * 1974-07-29 1975-10-21 Eppco Pulsating powder metering and dispensing device
US4162868A (en) * 1977-12-20 1979-07-31 Browne Hubbard P Invalid feeding device
US4163582A (en) * 1977-01-08 1979-08-07 Bergwerksverband Gmbh Pneumatic stowing apparatus
US4184258A (en) * 1978-01-30 1980-01-22 The United States Of America As Represented By The Department Of Health, Education And Welfare Powder blower device
US4207081A (en) * 1977-02-19 1980-06-10 Krupp-Koppers Gmbh Process for gasifying fine grained and dust-like solid fuels
US4305531A (en) * 1978-09-21 1981-12-15 Dooley Dan W Pneumatically operated controlled volume dispensing device
FR2615418A1 (fr) * 1987-05-19 1988-11-25 Rhone Poulenc Agrochimie Appareil pour distribuer des quantites dosees de matiere granulaire
US4830547A (en) * 1984-12-07 1989-05-16 The Boeing Company Rivet manifold feed device
EP0366798A4 (en) * 1988-01-19 1990-12-05 Institut Gidrodinamiki Imeni M.A. Lavrentieva Sibirskogo Otdelenia Akademii Nauk Sssr Device for feeding gun powder to the barrel of a detonation installation
US5400921A (en) * 1993-09-21 1995-03-28 Chem-Trend Incorporated Powdered lubricant applicator
US6543708B1 (en) 2000-02-11 2003-04-08 International Paper Company Gas-controlled spray gun and metering apparatus
WO2021141820A1 (en) * 2020-01-06 2021-07-15 Boston Scientific Scimed, Inc. Devices for delivering powdered agents

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004735A (en) * 1974-06-12 1977-12-25 Zverev Anatoly Apparatus for detonating application of coatings
US4319715A (en) * 1977-12-20 1982-03-16 Garda Alexandr P Apparatus for explosive application of coatings to articles
US4215819A (en) * 1977-12-20 1980-08-05 Andruschak Oleg A Apparatus for explosive application of coatings to articles
US4258091A (en) * 1979-02-06 1981-03-24 Dudko Daniil A Method for coating
DE2914238C2 (de) * 1979-03-02 1981-04-23 Schweizerische Aluminium AG, 3965 Chippis Vorrichtung zur kontinuierlichen Tonerdezuführung mittels einer Dosiervorrichtung
DE3331961A1 (de) * 1983-09-05 1985-04-25 INTERATOM GmbH, 5060 Bergisch Gladbach Verfahren zum loeten und/oder zur oberflaechenbeschichtung von werkstuecken
DE3507032A1 (de) * 1985-02-28 1986-08-28 Hans Uwe Prof. Dr.rer.nat. 7910 Neu-Ulm Wolf Vorrichtung zum volumenmaessigen abmessen und einschleusen einer probe in ein messgefaess unter luftabschluss
US4627456A (en) * 1985-07-31 1986-12-09 Union Carbide Corporation Valve system for particulate solid flow control
GB2190101B (en) * 1986-05-09 1990-10-17 Inst Materialovedenia Akademii Detonation-gas apparatus for applying coatings
US4902539A (en) * 1987-10-21 1990-02-20 Union Carbide Corporation Fuel-oxidant mixture for detonation gun flame-plating
US4826734A (en) * 1988-03-03 1989-05-02 Union Carbide Corporation Tungsten carbide-cobalt coatings for various articles
US5223332A (en) * 1990-05-31 1993-06-29 Praxair S.T. Technology, Inc. Duplex coatings for various substrates
US5542606A (en) * 1994-06-17 1996-08-06 Demeton Usa, Inc. Gas detonation spraying apparatus
DE10222167A1 (de) * 2002-05-20 2003-12-04 Generis Gmbh Vorrichtung zum Zuführen von Fluiden

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818200A (en) * 1954-08-18 1957-12-31 Aerostyle Ltd Powder spray device
US3081914A (en) * 1961-03-01 1963-03-19 Dermont B Crafts Paste dispenser having collapsible tube supply and fluid pressure discharge
US3096948A (en) * 1961-09-12 1963-07-09 Scott Paper Co Winding apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2072845A (en) * 1933-11-18 1937-03-09 Benolt Francois Philip Charles Apparatus for spraying pulverized materials
FR953861A (fr) * 1942-07-10 1949-12-14 Procédé et appareil pour la pulvérisation de matières fusibles
US3404838A (en) * 1966-05-24 1968-10-08 Elwin A. Hawk Sr. Torch for applying powdered material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818200A (en) * 1954-08-18 1957-12-31 Aerostyle Ltd Powder spray device
US3081914A (en) * 1961-03-01 1963-03-19 Dermont B Crafts Paste dispenser having collapsible tube supply and fluid pressure discharge
US3096948A (en) * 1961-09-12 1963-07-09 Scott Paper Co Winding apparatus

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913795A (en) * 1974-07-29 1975-10-21 Eppco Pulsating powder metering and dispensing device
US4163582A (en) * 1977-01-08 1979-08-07 Bergwerksverband Gmbh Pneumatic stowing apparatus
US4207081A (en) * 1977-02-19 1980-06-10 Krupp-Koppers Gmbh Process for gasifying fine grained and dust-like solid fuels
US4162868A (en) * 1977-12-20 1979-07-31 Browne Hubbard P Invalid feeding device
US4184258A (en) * 1978-01-30 1980-01-22 The United States Of America As Represented By The Department Of Health, Education And Welfare Powder blower device
US4305531A (en) * 1978-09-21 1981-12-15 Dooley Dan W Pneumatically operated controlled volume dispensing device
US4830547A (en) * 1984-12-07 1989-05-16 The Boeing Company Rivet manifold feed device
FR2615418A1 (fr) * 1987-05-19 1988-11-25 Rhone Poulenc Agrochimie Appareil pour distribuer des quantites dosees de matiere granulaire
BE1001532A5 (fr) * 1987-05-19 1989-11-21 Rhone Poulenc Agrochimie Appareil pour distribuer des quantites dosees de matiere granulaire.
EP0366798A4 (en) * 1988-01-19 1990-12-05 Institut Gidrodinamiki Imeni M.A. Lavrentieva Sibirskogo Otdelenia Akademii Nauk Sssr Device for feeding gun powder to the barrel of a detonation installation
US5004021A (en) * 1988-01-19 1991-04-02 Institut Gidrodinamiki Imeni M.A. Lavrentieva Sibirskogo Oldelenia Akademii Nauk S.S.S.R. Arrangement for conveying powder to the barrel of a gas detonation apparatus
US5400921A (en) * 1993-09-21 1995-03-28 Chem-Trend Incorporated Powdered lubricant applicator
WO1995008505A1 (en) * 1993-09-21 1995-03-30 Chem-Trend Incorporated Powdered lubricant applicator
US6543708B1 (en) 2000-02-11 2003-04-08 International Paper Company Gas-controlled spray gun and metering apparatus
WO2021141820A1 (en) * 2020-01-06 2021-07-15 Boston Scientific Scimed, Inc. Devices for delivering powdered agents

Also Published As

Publication number Publication date
IT961343B (it) 1973-12-10
CS156046B1 (enrdf_load_stackoverflow) 1974-06-24
HU165107B (enrdf_load_stackoverflow) 1974-06-28
FR2147988A1 (enrdf_load_stackoverflow) 1973-03-11
US3773259A (en) 1973-11-20
DD98048A1 (enrdf_load_stackoverflow) 1973-06-12
FR2151840A5 (enrdf_load_stackoverflow) 1973-04-20
CS160341B1 (enrdf_load_stackoverflow) 1975-03-28
FR2147988B1 (enrdf_load_stackoverflow) 1978-05-05
IT965905B (it) 1974-02-11
DD97869A1 (enrdf_load_stackoverflow) 1973-05-21

Similar Documents

Publication Publication Date Title
US3797709A (en) Volumetric metering apparatus
US4893966A (en) Lock apparatus for introducing dry granular materials into a pneumatic conveying conduit and spray gun for such materials
US3167398A (en) Metering apparatus
GB1353062A (en) Aerated powder pump
KR890700516A (ko) 투약시스템
GB973986A (en) Pneumatic filling apparatus for expanded polystyrene
CN116424876B (zh) 封闭式物料添加装置
US3557405A (en) Automated multicavity isostatic press
GB2184709A (en) Dispensing repeated doses of fluent material
US4938637A (en) Method and apparatus for bottom loading a pneumatic transport pressure vessel
JPS61111227A (ja) 粉粒体の供給装置
US3457141A (en) Charging of preheated coal into the coking chambers of a coke oven battery
US4462740A (en) Rotary charger
US3191234A (en) Apparatus for injection molding
US2609791A (en) Pneumatic vibrator
US4148405A (en) Solid feeder and method
JPH0112942B2 (enrdf_load_stackoverflow)
GB2183210A (en) Material conveying apparatus
US968126A (en) Pump.
GB672945A (en) Improvements in the packaging of powdery, granular and other fluent solid materials
CN210935461U (zh) 一种旋杯式静电喷涂系统的送料装置
CN2085788U (zh) 脉冲气力输送泵
US3232487A (en) Dispersing method and apparatus
JPS5521332A (en) Device for separating and feeding tap-headed bar
CN207396971U (zh) 碳粉筒及成像装置