US3805879A - Low pressure casting apparatus for magnesium - Google Patents

Low pressure casting apparatus for magnesium Download PDF

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Publication number
US3805879A
US3805879A US00291196A US29119672A US3805879A US 3805879 A US3805879 A US 3805879A US 00291196 A US00291196 A US 00291196A US 29119672 A US29119672 A US 29119672A US 3805879 A US3805879 A US 3805879A
Authority
US
United States
Prior art keywords
plunger
riser
low pressure
casting apparatus
pressure casting
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
US00291196A
Other languages
English (en)
Inventor
O Bolland
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.)
EXPORT-METALL-INDUSTRIE GmbH
Merkur Metallwerk GmbH
Original Assignee
Merkur Metallwerk GmbH
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
Priority claimed from DE19712148559 external-priority patent/DE2148559C/de
Application filed by Merkur Metallwerk GmbH filed Critical Merkur Metallwerk GmbH
Application granted granted Critical
Publication of US3805879A publication Critical patent/US3805879A/en
Assigned to EXPORT-METALL-INDUSTRIE GESELLSCHAFT MIT BESCHRANKTER HAFTUNG reassignment EXPORT-METALL-INDUSTRIE GESELLSCHAFT MIT BESCHRANKTER HAFTUNG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: METALL-WERK-MERKUR GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
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
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould

Definitions

  • This disclosure relates to a low pressure castin g PP 2148559 ratus for magnesium including a riser passing the liquefied furnace contents into the cast mold.
  • the upper gitudinally wall of the riser has a guide bore for a lon shiftable hollow plunger sealing said bore, the hollow plunger being provided near its end adjacent to the interior space of the riser with an outlet opening for passing a shield gas therethrough, with the outlet opening closed upon moving the plunger into the guide bore.
  • This invention attempts to solve the problem of providing a low pressure casting apparatus for magnesium of the type mentioned above in which with simple means and in consideration of labor and time saving operation the admission of air oxygen to the liquid magnesiumdisposed in the riser of the low pressure furnace is reliably and efficiently prevented.
  • a low pressure casting apparatus for magnesium with a riser passing the liquefied furnace contents, i.e., magnesium, into the cast mold, so that the upper side wall of the riser, or an intermediate member arranged between it and the cast mold, has a guide bore for a hollow plunger longitudinally shiftable and sealing the bore.
  • the hollow plunger is provided near its end adjacent to the interior of the riser or the intermediate member with an outlet opening to be closed upon movement of the plunger in the guide bore, the outlet opening being provided for a shield or inert gas to bepassed through the hollow plunger.
  • the plunger is shiftable with its outlet opening up to the longitudinal axis of the riser so that the shield gas flowing from the outlet opening of the plunger can be passed downwardly centrically into the free surface of the magnesium disposed in the riser.
  • the plunger is connected to an extension having a longitudinal bore, said extension being shiftable into the hollow piston rod of a pressure fluid cylinder.
  • the piston rod and the plunger project at both ends from the pressure fluid cylinder, the end of the tubular extension remote from the plunger being r eleasably connected to a shiftable or flexible supply line for a shield gas.
  • extension of the plunger is capable of being coupled to through struts, pins or the like to the riser or the inter-.
  • FIG. 1 is a vertical sectional view casting apparatus
  • FIG. 2 is a part-sectional view in an enlarged scale in relationship to FIG. 1 showing the intermediate member, the pressure fluid cylinder, and the plunger with the tubular extension,
  • FIG. 3 is a plan view of the riser,'the cylinder with the piston and the hollow piston rod as well as the plunger with the tubular extension, 3
  • FIG. 4 is aside elevational view of the coupling between the hollow piston rod and the tubular extension of the plunger
  • FIG. 5 a sectional view taken along line V-V of F IG.-
  • the furnace 1 of the low-pressure casting apparatus of this invention has an interior space 2 which is closed upwardly by the furnace cover 3. Through an opening 4 of the cover a supply line 5 extends for the gas inert in relationship to the liquid furnace contents, i.e. the
  • the inert gas being passed pres surized into the interior space 2 of the furnace l and pressing a part of the furnace contents into the riser 6 and from there intothe cast mold 7.
  • the riser 6 is provided at its upper end with a flange 8 which abuts a complementary shoulder 9 of the bore 10 of the cover 3, which is supported on the furnace at its margin 11. 7
  • An intermediate member 13 (FIG. 2) is positioned on the flange '8 of the riser 6 with its flange l2, the interior space 15 of said intermediate member being disposed coaxial relative to the interior space 18 of the riser 6, so that the two cited interior spaces merge with one another.
  • the cast mold 7 is supported on the flange 14 of the intermediate member 13, the magnesium coming from the furnace 1 into the riser and the interior 15 of the intermediate member 13 passing through the opening l6 of the intermediate member into the cast mold 7.
  • the bore 17 and the plunger 19 are'formed insuch a way that the plunger sealinglycloses thebore so that liquidmagnesium rising in the riser 6 and the intermediate member 13 isnot able to flow in the bore 17.
  • the front end of theplunger may support seal discs engaging the inner wall 13a; j I
  • the plunger 19 is shiftable from the position represented in full lines in FIG. 2 into position 19 so that the outlet opening 20 of a small duct 21 of the plunger is positioned in the longitudinal center M of the riser 6 and the intermediate member 13. 1,
  • the duct2l directed vertically downwardly of the plunger 19 merges'in an axial bore 22 so that the plunger represents a hollow plunger.
  • the end of the plunger 19 remote from the inner space of the intermediate member 13 is screwed in a tubular extension 23 which likewise has an axial bore 24 and which is inserted through the hollow piston rod 25 of the piston 25a of a pressure fluid cylinder 25b.
  • the end 26 projecting from the hollow piston rod 25 of the tubular extension 23 of the plunger 19 is connected via an elbow member 27 of a quick-action coupling 28 to a supply line 29 for a shield gas.
  • the free end of the hollow piston rod 25 mounts an attachment 30 defining a shoulder 31.
  • the attachment 30 having two parallel cutouts-33 is secured against a rotation by a guiding pin 30a which slides in a bore 30b of the outboard cylinder cap 250.
  • the tubular extension 23 of the plunger 19 is provided with a plate 32.
  • a hoke 34 capable of being shifted into cutouts 33 of the attachment30 and having a recess 35 (FIG. 3)
  • the tubular extension 23 is connected to the piston 25a and'the hollow piston rod 25 by means of the plate 32 securedthereto. After removal of yoke 34 the plunger 19 together with the extension 23 can be pulled out of the hollow piston rod 25 of the pressure fluid cylinder 25b.
  • the apparatus of this invention has the advantage of being able to do without additional movable control means such as valves and the like for the supply of inert gas to the interior of the riser.
  • the plunger can be quickly withdrawn from the cylinder 25b or the attachment 30 which can be done after releasing the yoke 34. After releasing the coupling 28 and the attachment of a new plunger 19 with an extension 23, the mentioned parts can quickly be coupled to the attachment 30 again. The releasing of the plunger 19 from the extension 23 can also be effected readily since the plunger is screwed into the extension 23.
  • a low pressure casting apparatus for magnesium including a riser passing the liquefied furnace contents into the cast mold, characterized in that the upper side wall of the riser has a guide bore' for a longitudinally 2.
  • a low pressure casting apparatus characterized in that the hollow plunger is' provided with an axial blind bore in which a duct opens defining the outlet opening and directed toward the lower riser end.
  • a low pressure casting apparatus characterized in that the plunger is connected to an extension having a longitudinal bore, said extension being shiftable into the hollow piston rod of a pressure fluid cylinder.
  • a low pressure casting apparatus characterized in that the piston rod and the extension project at both ends from the pressure fluid cylinder, the end remote from the plunger of the tubular extension being releasably connected to a shiftable supply line for a shield gas.
  • a low pressure casting. apparatus characterized in that the extension of the plunger is capable of being coupled to the piston of the pressure fluid cylinder and of being advertove'd with the plunger from the pressure fluid cylinder.
  • a low pressure casting apparatus characterized in that the piston rod is provided with an attachment the end of which projecting from the cylinder is provided witha yokecoupling the extension to the attachment.
  • a low pressure casting apparatus characterized in that .the pressure fluid cylinder I is connected through struts and pins to the riser.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Devices For Molds (AREA)
US00291196A 1971-09-29 1972-09-22 Low pressure casting apparatus for magnesium Expired - Lifetime US3805879A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712148559 DE2148559C (de) 1971-09-29 Niederdruck-Gießvorrichtung für Magnesium

Publications (1)

Publication Number Publication Date
US3805879A true US3805879A (en) 1974-04-23

Family

ID=5820893

Family Applications (1)

Application Number Title Priority Date Filing Date
US00291196A Expired - Lifetime US3805879A (en) 1971-09-29 1972-09-22 Low pressure casting apparatus for magnesium

Country Status (5)

Country Link
US (1) US3805879A (it)
CH (1) CH546613A (it)
FR (1) FR2154537B1 (it)
GB (1) GB1366432A (it)
IT (1) IT967906B (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111570774A (zh) * 2020-05-27 2020-08-25 杭州小鲤工业设计有限公司 一种便于散热的led节能灯加工的系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727191A (en) * 1926-05-18 1929-09-03 Thaddeus F Baily Casting apparatus
US2015111A (en) * 1934-02-16 1935-09-24 John Robertson Co Inc Apparatus for extruding metals
US3116998A (en) * 1959-12-31 1964-01-07 Light Metals Res Lab Inc Continuous vacuum and inert gas process for treating titanium and other metals

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727191A (en) * 1926-05-18 1929-09-03 Thaddeus F Baily Casting apparatus
US2015111A (en) * 1934-02-16 1935-09-24 John Robertson Co Inc Apparatus for extruding metals
US3116998A (en) * 1959-12-31 1964-01-07 Light Metals Res Lab Inc Continuous vacuum and inert gas process for treating titanium and other metals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111570774A (zh) * 2020-05-27 2020-08-25 杭州小鲤工业设计有限公司 一种便于散热的led节能灯加工的系统

Also Published As

Publication number Publication date
GB1366432A (en) 1974-09-11
CH546613A (de) 1974-03-15
FR2154537B1 (it) 1979-02-09
DE2148559B1 (de) 1972-07-27
IT967906B (it) 1974-03-11
FR2154537A1 (it) 1973-05-11

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Owner name: EXPORT-METALL-INDUSTRIE GESELLSCHAFT MIT BESCHRANK

Free format text: CHANGE OF NAME;ASSIGNOR:METALL-WERK-MERKUR GESELLSCHAFT MIT BESCHRANKTER HAFTUNG;REEL/FRAME:004501/0439

Effective date: 19851213

STCF Information on status: patent grant

Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES)