US2662256A - Pump for feeding molten metal - Google Patents
Pump for feeding molten metal Download PDFInfo
- Publication number
- US2662256A US2662256A US215836A US21583651A US2662256A US 2662256 A US2662256 A US 2662256A US 215836 A US215836 A US 215836A US 21583651 A US21583651 A US 21583651A US 2662256 A US2662256 A US 2662256A
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- US
- United States
- Prior art keywords
- pump
- housing
- metal
- plunger
- port
- 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
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-
- 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
- B22D17/30—Accessories for supplying molten metal, e.g. in rations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/04—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being hot or corrosive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/02—Pumping installations or systems having reservoirs
- F04B23/021—Pumping installations or systems having reservoirs the pump being immersed in the reservoir
- F04B23/023—Pumping installations or systems having reservoirs the pump being immersed in the reservoir only the pump-part being immersed, the driving-part being outside the reservoir
Definitions
- the present invention relates to a pump for feeding molten metal and has particular reference to a pump designed for feeding molten lead or similar metal to a casting mold for making strip material and type.
- Pumps of this character used heretofore consisted of a cylindrical housing having means for supporting the same with its lower end submerged in a body of molten metal, a side arm having a discharge nozzle above the level of the metal, an intake port in the side of the housing and comparatively near the level of the metal, with a float valve controlling the intake, and a piston or plunger reciprocable in the housing for drawing in metal on the upward stroke and for forcing metal through the nozzle on the downward stroke.
- the pump In the second place, the pump would draw on the molten metal comparatively near the top surface and would frequently entrain dross formed on the surface and deposit the same along the pump walls, the plunger and the discharge,
- Figure 1 shows a side view of my pump in position with respect to a pot of molten lead
- FIG. 1 a plan view of my intake valve assembly used at the bottom end of the pump hous r Figure 3, a side view of the same,
- Figure 4 a side view of a plunger used in my pump, taken at a right angle to that of Figure 1,
- Figure 6 a vertical section through the nozzle used in my pump.
- my pump comprises in its principal features a substantially cylindrical housing I having an inclined arm 2 projecting therefrom, with a discharge nozzle 3 at the upper end of the arm, and having an intake valve 4 at the bottom end thereof, and a plunger 5 reciprocable in the lower end of the cylinder and having a plunger rod 6.
- the housing l is substantially cylindrical in form and has a slightly enlarged bottom end i to form a pump chamber 8.
- the lower end of the chamber is closed by a plug 9 threaded into the cylinder, and the valve 4 is threaded into the plug centrally, the valve having a lower axial port I B and an upper port I l of slightly larger diameter, the upper port communicating with the lower port and forming a spherically rounded valve seat I? therewith.
- a ball valve I3 is seated on the seat and is limited in its upward movement by a cross-pin 14 extending dia- 3 metrically through the threaded portion of the valve.
- the arm 2 extends sidewise from the pump chamber 8 in an upwardly inclined direction and carries at its upper end the nozzle 3 adapted for discharge into the mold if: indicated only sketchily.
- the arm has a port 2 communicating with the pump chamber and the nozzle.
- the housing I above the pump chamber, is slightly reduced in diameter, as at E6, to serve as a guide for the plunger 5, then widens again, as at [7, to form two oppositely disposed windows 18, and above the windows, is provided with two lateral brackets 19, by means of which the housing may be supported with respect to a pot [9' so that the lower end of the housing is submerged in a molten body of lead provided in the pot. The latter is heated from below by means not shown.
- the housing is formed with opposing fiat faces 28 providing upper and lower lips or abutments 2
- have a cylindrical top piece 22 secured thereon, this top piece having two opposing vertical arms 23 serving as guides for part or the plunger rod.
- the plunger rod with its plunger 5 is illustrated in detail in Figure 4 and is of conventional type.
- the rod is of sufiicient length to project outside the housing when the plunger reciprocates in the pump chamber and is provided, at its upper end, with a handle 2
- the rod has three registering sets of wings 25, 26 and 27, the lower wings serving as guide means within the housing and the two upper sets serving as abutments for operating levers 28 to work against. Between the two upper sets of wings the plunger rod has a pair of transverse wings 29 serving as guide means between the two arms 23.
- the general structure of the housing and the plunger is substantially conventional, and the principal novel feature of the present invention lies in the arrangement of the intake valve at the bottom end of the housing which allows the pump to draw on the lower level of the molten metal, where it is most liquid due to the application of heat from the bottom and where it is clear of dross, with the further advantages that the pump chamber is full of liquid metal at all times, resulting in a smoother and more uniform flow, that less dross is formed on the surface of the metal due to reduced agitation and that no dross enters the pump chamber or the discharge.
- valve at the bottom should be made or" the best material available, preferable specially treated alloy steel, hardened to withstand the heat of the metal in the pot.
- I provide a check valve 30 in the lower end of the port 2, this valve being substantially similar to the intake valve 4 and serving to prevent back flow of the molten lead from the port 2' into the pump cylinder on the suction stroke.
- the nozzle 3 is formed with an adjustable vent as disclosed in detail in Figure 6.
- of the nozzle has a downwardly inclined branch port 32 feeding into a sleeve 33 threaded into the nozzle as at 34.
- the sleeve is formed with two downwardly presented passages 35 and has a screw 36 threaded thereinto, the screw being operable for covering and uncovering the passages 35 to a desired extent.
- a pump for molten lead comprising a generally cylindrical housing having a pair of fixed brackets projecting therefrom intermediate the length thereof, the brackets being adapted for resting on the rim of a pot having a body of molten lead therein to support the housing vertically within the pot, and the portion of the housing below the brackets being dimensioned to extend downwardly to a level near the bottom of the pot so as to be submerged in the molten lead, a rigid arm projecting from the submerged portion of the cylinder in an upwardly inclined direction and having a nozzle at the upper end thereof above the level of the molten lead, a plunger reciprocable in the lower end of the housing and projecting upwardly above the housing and having a handle at the upper end thereof, a pair of wings projecting from the plunger intermediate the upper end of the housing and the handle, an operating lever engaging between the wings for reciprocating the plunger, the arm having a port leading from the lower end of the housing to the nozzle, a closure for the bottom end of the housing, and an intake valve
- a pump for molten lead comprising a generally cylindrical housing having a pair of fixed brackets projecting sidewise therefrom intermediate the length thereof, the brackets being adapted for resting on the rim of a pot having a body of molten lead therein to support the housing vertically within the pot, and the portion of the housing below the brackets being dimensioned to extend downwardly to a level near the bottom of the pot so as to be submerged in the molten lead, a rigid arm projecting from the submerged portion of the cylinder in an upwardly inclined direction and having a nozzle at the upper end thereof above the level of the molten lead, a plunger reciprocable in the lower end of the housing and having a handle at the upper end thereof, a pair of wings projecting from the plunger intermediate the upper end of the housing and the handle, an operating lever engaging between the wings for reciprocating the plunger, the arm having a port leading from the lower end of the housing to the nozzle, a closure for the bottom end of the housing, and an intake valve mounted within said closure, the
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Description
Dec. 15, 1953 A. L. GAGNE PUMP FOR FEEDING MOLTEN METAL Filed March 15, 1951 INVENTOR. Arfhur L. Gag/7e 4 TTORNEY Patented ec. 15, 1953 UITED STATES PATENT OFFICE PUMP FOR FEEDING MOLTEN METAL Arthur L. Gagne, San Francisco, Calif.
Application March 15, 1951, Serial No. 215,836 Z-CIaiIHS. (o1. 22- 70) The present invention relates to a pump for feeding molten metal and has particular reference to a pump designed for feeding molten lead or similar metal to a casting mold for making strip material and type.
Pumps of this character used heretofore consisted of a cylindrical housing having means for supporting the same with its lower end submerged in a body of molten metal, a side arm having a discharge nozzle above the level of the metal, an intake port in the side of the housing and comparatively near the level of the metal, with a float valve controlling the intake, and a piston or plunger reciprocable in the housing for drawing in metal on the upward stroke and for forcing metal through the nozzle on the downward stroke.
This arrangement had a number of disadvantages.
In the first place, the piston on the upward stroke would not clear the intake port until it approached the limit of its travel and the interim would create a vacuum sucking on the discharge port and causing undesirable fluctuations in the latter.
In the second place, the pump would draw on the molten metal comparatively near the top surface and would frequently entrain dross formed on the surface and deposit the same along the pump walls, the plunger and the discharge,
causing undue wear on piston and pump body and the leading of the molds, and calling for frequent cleaning of the elements affected.
In the third place, the suction on the exhaust side and the drossing of the metal would frequently result in an uneven flow of the metal.
In the fourth place, the drawing of the molten metal from near the top surface of the metal body would encourage the forming of dross on said surface resulting in loss of valuable tin and antimony.
And finally, the pump drawing from near the surface of the body of metal would fail to take advantage of the fact that the metal is hottest and best adapted for pumping near the bottom of the pot where the heat is applied.
In the present invention it is proposed to provide for a relatively simple improvement in the pump consisting principally in the placing of the intake valve in the bottom end of thepump thereby eliminating or at least greatly reducing the injurious results of the undesirable features pointed out, my new pump being designed to draw dross-free metal from the bottom of the pot, to insure uniformity of metal flow, to re- 2 duce the forming of dross on the surface of the body of metal, and to greatly reduce the entraining of dross into the pumped metal, thereby saving wear on the pump body, the plunger and the nozzle, and essentially preventing the leading of the mold.
It is further proposed to provide a suitable check valve at the outlet of the pump to prevent the lead previously discharged into the side arm from flowing back into the pump chamber on the suction stroke.
Further objects and advantages of my invention will appear as the specification proceeds, and the novel features of. my invention will be fully defined in the claims attached hereto.
The preferred form of my invention is illustrated in the accompanying drawing, in which Figure 1 shows a side view of my pump in position with respect to a pot of molten lead,
Figure 2., a plan view of my intake valve assembly used at the bottom end of the pump hous r Figure 3, a side view of the same,
Figure 4, a side view of a plunger used in my pump, taken at a right angle to that of Figure 1,
Figure 5, a horizontal section taken along line 55- of Figure 1, and
Figure 6, a vertical section through the nozzle used in my pump.
While I have shown only the preferred form of my invention, I wish to have it understood that various changes and modifications may be made within the scope of the claims attached hereto without departing from the spirit of the invention.
Referring to the drawing in detail, my pump comprises in its principal features a substantially cylindrical housing I having an inclined arm 2 projecting therefrom, with a discharge nozzle 3 at the upper end of the arm, and having an intake valve 4 at the bottom end thereof, and a plunger 5 reciprocable in the lower end of the cylinder and having a plunger rod 6.
The housing l is substantially cylindrical in form and has a slightly enlarged bottom end i to form a pump chamber 8. The lower end of the chamber is closed by a plug 9 threaded into the cylinder, and the valve 4 is threaded into the plug centrally, the valve having a lower axial port I B and an upper port I l of slightly larger diameter, the upper port communicating with the lower port and forming a spherically rounded valve seat I? therewith. A ball valve I3 is seated on the seat and is limited in its upward movement by a cross-pin 14 extending dia- 3 metrically through the threaded portion of the valve.
The arm 2 extends sidewise from the pump chamber 8 in an upwardly inclined direction and carries at its upper end the nozzle 3 adapted for discharge into the mold if: indicated only sketchily. The arm has a port 2 communicating with the pump chamber and the nozzle.
The housing I, above the pump chamber, is slightly reduced in diameter, as at E6, to serve as a guide for the plunger 5, then widens again, as at [7, to form two oppositely disposed windows 18, and above the windows, is provided with two lateral brackets 19, by means of which the housing may be supported with respect to a pot [9' so that the lower end of the housing is submerged in a molten body of lead provided in the pot. The latter is heated from below by means not shown.
Above the brackets, the housing is formed with opposing fiat faces 28 providing upper and lower lips or abutments 2| adapted for cooperation with an operating element in imparting a slight vibratory motion to the housing as a whole in accordance with conventional practice. The upper abutments 2| have a cylindrical top piece 22 secured thereon, this top piece having two opposing vertical arms 23 serving as guides for part or the plunger rod.
The plunger rod with its plunger 5 is illustrated in detail in Figure 4 and is of conventional type. The rod is of sufiicient length to project outside the housing when the plunger reciprocates in the pump chamber and is provided, at its upper end, with a handle 2 The rod has three registering sets of wings 25, 26 and 27, the lower wings serving as guide means within the housing and the two upper sets serving as abutments for operating levers 28 to work against. Between the two upper sets of wings the plunger rod has a pair of transverse wings 29 serving as guide means between the two arms 23.
The general structure of the housing and the plunger is substantially conventional, and the principal novel feature of the present invention lies in the arrangement of the intake valve at the bottom end of the housing which allows the pump to draw on the lower level of the molten metal, where it is most liquid due to the application of heat from the bottom and where it is clear of dross, with the further advantages that the pump chamber is full of liquid metal at all times, resulting in a smoother and more uniform flow, that less dross is formed on the surface of the metal due to reduced agitation and that no dross enters the pump chamber or the discharge.
It is apparent that the valve at the bottom should be made or" the best material available, preferable specially treated alloy steel, hardened to withstand the heat of the metal in the pot.
As a further feature of the invention I provide a check valve 30 in the lower end of the port 2, this valve being substantially similar to the intake valve 4 and serving to prevent back flow of the molten lead from the port 2' into the pump cylinder on the suction stroke.
The nozzle 3 is formed with an adjustable vent as disclosed in detail in Figure 6. The main port 3| of the nozzle has a downwardly inclined branch port 32 feeding into a sleeve 33 threaded into the nozzle as at 34. The sleeve is formed with two downwardly presented passages 35 and has a screw 36 threaded thereinto, the screw being operable for covering and uncovering the passages 35 to a desired extent.
I claim:
1. A pump for molten lead comprising a generally cylindrical housing having a pair of fixed brackets projecting therefrom intermediate the length thereof, the brackets being adapted for resting on the rim of a pot having a body of molten lead therein to support the housing vertically within the pot, and the portion of the housing below the brackets being dimensioned to extend downwardly to a level near the bottom of the pot so as to be submerged in the molten lead, a rigid arm projecting from the submerged portion of the cylinder in an upwardly inclined direction and having a nozzle at the upper end thereof above the level of the molten lead, a plunger reciprocable in the lower end of the housing and projecting upwardly above the housing and having a handle at the upper end thereof, a pair of wings projecting from the plunger intermediate the upper end of the housing and the handle, an operating lever engaging between the wings for reciprocating the plunger, the arm having a port leading from the lower end of the housing to the nozzle, a closure for the bottom end of the housing, and an intake valve mounted within said closure.
2. A pump for molten lead comprising a generally cylindrical housing having a pair of fixed brackets projecting sidewise therefrom intermediate the length thereof, the brackets being adapted for resting on the rim of a pot having a body of molten lead therein to support the housing vertically within the pot, and the portion of the housing below the brackets being dimensioned to extend downwardly to a level near the bottom of the pot so as to be submerged in the molten lead, a rigid arm projecting from the submerged portion of the cylinder in an upwardly inclined direction and having a nozzle at the upper end thereof above the level of the molten lead, a plunger reciprocable in the lower end of the housing and having a handle at the upper end thereof, a pair of wings projecting from the plunger intermediate the upper end of the housing and the handle, an operating lever engaging between the wings for reciprocating the plunger, the arm having a port leading from the lower end of the housing to the nozzle, a closure for the bottom end of the housing, and an intake valve mounted within said closure, the arm having an outlet valve at the lower end of its port.
ARTHUR L. GAGNE.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 625,998 Bancroft May 30, 1899 674,374 Bancroft May 21, 1901 720,714 Lightbown Feb. 17, 1903 964,677 Nicholas et al July 19, 1910 1,149,285 Pierpont Aug. 10, 1915 1,193,859 Bary Aug. 8, 1916 1,226,408 Tenca May 15, 1917 1,732,075 Willis Oct. 15, 1929 1,773,799 Tornberg Aug. 26, 1930 2,236,212 Huck Mar. 25, 1941 2,243,293 Stahl May 27, 1941 2,422,990 Spaier June 24, 1947 2,522,866 Gash Sept. 19, 1950 2,531,290 Narrow Nov. 21, 1950 2,582,137 Kux Jan. 8, 1952 2,609,575 Morin Sept. 9, 1952
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US215836A US2662256A (en) | 1951-03-15 | 1951-03-15 | Pump for feeding molten metal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US215836A US2662256A (en) | 1951-03-15 | 1951-03-15 | Pump for feeding molten metal |
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US2662256A true US2662256A (en) | 1953-12-15 |
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US215836A Expired - Lifetime US2662256A (en) | 1951-03-15 | 1951-03-15 | Pump for feeding molten metal |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2972172A (en) * | 1958-01-22 | 1961-02-21 | Alfred P Federman | Method for feeding liquid casting material into an article mold |
FR2673553A1 (en) * | 1991-03-06 | 1992-09-11 | Sigre Sa | IMMERSE INJECTION DEVICE. |
US5375746A (en) * | 1993-05-10 | 1994-12-27 | Server Products, Inc. | Food pump having a cast valve body |
US5579959A (en) * | 1995-05-16 | 1996-12-03 | Star Manufacturing International, Inc. | Viscous food products housing, pump, dispenser, and valve apparatus |
US6016935A (en) * | 1998-08-01 | 2000-01-25 | Star Manufacturing International, Inc. | Viscous food dispensing and heating/cooling assembly and method |
Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US625998A (en) * | 1899-05-30 | bang ioft | ||
US674374A (en) * | 1900-09-25 | 1901-05-21 | Lanston Monotype Machine Co | Fluid-injecting mechanism for type-casting or other machines. |
US720714A (en) * | 1901-09-24 | 1903-02-17 | Lanston Monotype Machine Co | Fluid-metal-injecting mechanism. |
US964677A (en) * | 1908-02-26 | 1910-07-19 | Us Graphotype Company | Type casting and composing machine. |
US1149285A (en) * | 1912-06-12 | 1915-08-10 | Lanston Monotype Machine Co | Pump for type-casting machines. |
US1193859A (en) * | 1916-08-08 | Pumping apparatus for molten lead or other fusible substances | ||
US1226408A (en) * | 1915-04-26 | 1917-05-15 | Louis P Tenca | Die-casting machine. |
US1732075A (en) * | 1928-06-25 | 1929-10-15 | Intertype Corp | Metal pot for typographical machines |
US1773799A (en) * | 1926-02-02 | 1930-08-26 | Wood Newspaper Mach Corp | Pneumatic ladle pump |
US2236212A (en) * | 1937-12-04 | 1941-03-25 | Hoe & Co R | Stereotype plate casting device |
US2243293A (en) * | 1939-03-31 | 1941-05-27 | Stahl Carl | Die casting machine |
US2422990A (en) * | 1945-10-10 | 1947-06-24 | Spanier Benjamin | Wax injector |
US2522366A (en) * | 1947-11-01 | 1950-09-12 | Du Pont | Preparation of substituted glutaric acid esters |
US2531290A (en) * | 1948-04-12 | 1950-11-21 | Anton H Narrow | Strip casting machine |
US2582137A (en) * | 1948-12-06 | 1952-01-08 | Kux Machine Co | Means for automatically transferring and metering charges of molten metal |
US2609575A (en) * | 1949-05-12 | 1952-09-09 | Louis H Morin | Apparatus for pressure injecting casting material by diaphragm pumps |
-
1951
- 1951-03-15 US US215836A patent/US2662256A/en not_active Expired - Lifetime
Patent Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US625998A (en) * | 1899-05-30 | bang ioft | ||
US1193859A (en) * | 1916-08-08 | Pumping apparatus for molten lead or other fusible substances | ||
US674374A (en) * | 1900-09-25 | 1901-05-21 | Lanston Monotype Machine Co | Fluid-injecting mechanism for type-casting or other machines. |
US720714A (en) * | 1901-09-24 | 1903-02-17 | Lanston Monotype Machine Co | Fluid-metal-injecting mechanism. |
US964677A (en) * | 1908-02-26 | 1910-07-19 | Us Graphotype Company | Type casting and composing machine. |
US1149285A (en) * | 1912-06-12 | 1915-08-10 | Lanston Monotype Machine Co | Pump for type-casting machines. |
US1226408A (en) * | 1915-04-26 | 1917-05-15 | Louis P Tenca | Die-casting machine. |
US1773799A (en) * | 1926-02-02 | 1930-08-26 | Wood Newspaper Mach Corp | Pneumatic ladle pump |
US1732075A (en) * | 1928-06-25 | 1929-10-15 | Intertype Corp | Metal pot for typographical machines |
US2236212A (en) * | 1937-12-04 | 1941-03-25 | Hoe & Co R | Stereotype plate casting device |
US2243293A (en) * | 1939-03-31 | 1941-05-27 | Stahl Carl | Die casting machine |
US2422990A (en) * | 1945-10-10 | 1947-06-24 | Spanier Benjamin | Wax injector |
US2522366A (en) * | 1947-11-01 | 1950-09-12 | Du Pont | Preparation of substituted glutaric acid esters |
US2531290A (en) * | 1948-04-12 | 1950-11-21 | Anton H Narrow | Strip casting machine |
US2582137A (en) * | 1948-12-06 | 1952-01-08 | Kux Machine Co | Means for automatically transferring and metering charges of molten metal |
US2609575A (en) * | 1949-05-12 | 1952-09-09 | Louis H Morin | Apparatus for pressure injecting casting material by diaphragm pumps |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2972172A (en) * | 1958-01-22 | 1961-02-21 | Alfred P Federman | Method for feeding liquid casting material into an article mold |
FR2673553A1 (en) * | 1991-03-06 | 1992-09-11 | Sigre Sa | IMMERSE INJECTION DEVICE. |
US5375746A (en) * | 1993-05-10 | 1994-12-27 | Server Products, Inc. | Food pump having a cast valve body |
US5579959A (en) * | 1995-05-16 | 1996-12-03 | Star Manufacturing International, Inc. | Viscous food products housing, pump, dispenser, and valve apparatus |
US6016935A (en) * | 1998-08-01 | 2000-01-25 | Star Manufacturing International, Inc. | Viscous food dispensing and heating/cooling assembly and method |
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