US3804152A - Low pressure die casting apparatus - Google Patents

Low pressure die casting apparatus Download PDF

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Publication number
US3804152A
US3804152A US00268903A US26890372A US3804152A US 3804152 A US3804152 A US 3804152A US 00268903 A US00268903 A US 00268903A US 26890372 A US26890372 A US 26890372A US 3804152 A US3804152 A US 3804152A
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US
United States
Prior art keywords
furnace
die
supporting structure
mounting
die supporting
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
US00268903A
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English (en)
Inventor
W Cook
J Carlsen
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.)
DIMO HOLDINGS Ltd LLANDOWLAIS
Original Assignee
DIMO HOLDINGS Ltd LLANDOWLAIS
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.)
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Publication date
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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
    • 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

  • a die placed in co-operation with a feed duct thereby receives a charge of metal.
  • the entire die mounting structure is arranged to be movable relative to the or.
  • each furnace in separate vertical and horizontal modes so that a die can be raised clear and to one side of an associated fumace.
  • the die mounting structure and/or furnace may be movable and the horizontal motion is conveniently made by pivoting about a vertical axis.
  • a low pressure die casting apparatus comprising a furnace and a die supporting structure for holding a die over the furnace in co-operation with a feed duct from the cover thereof, the furnace and the entire die sup,- porting structure being capable of relative disengagement at least laterally, the lateral movement being substantially independent of any further disengaging action.
  • This disengagement facility may be achieved in several ways.
  • the furnace is fixed and the die supportingstructure is vertically and laterally movable. This is conveniently effected by pivotally mounting the structure on a vertical column laterally offset from the furnace,so that the dies can be swung from over the furnace to a position clear of the latter.
  • the column itself may be movable vertically, by means of a supporting jackfor example, to raise and lower the die supporting structure.
  • the die supporting structure includes a single platen unit, i.e., one pair of upper and lower platens on which respective die parts are mounted and which close together for the actual casting (over the furnace) and separate for release of the cast article, which, in .this case may be laterally clear of the furnace.
  • the structure may include a plurality of laterally separate platen units. With this arrangement, while one platen unit is co-operating with the furnace the or each other platen unit is laterally clear of the furnace. Thus while one article is being cast another is being removed from its die, and the furnace is more continuously in use:
  • At least one fur- .ther furnace vertically and horizontally fixed as the first mentioned furnace, and similarly co-operable with and disengageable from the die supporting structure.
  • the die supporting structure having a single platen unit, the latter may be selectively brought into engagement with either orany of the furnaces and have an intermediate position laterally clear of said furnaces.
  • the other can be used.
  • two or more platen units there are preferably the same number as there are furnaces and either they all co-operate simultaneously or while one platen unit is disposed over its associated furnace the other, or at least-one other, is laterally clear of its associated furnace.
  • the die supporting structure is in the form of a frame with vertical guide columns extending between upper and lower plate members.
  • An upper, movable platen is slidable on the columns between the upper and lower plate members, and the latter may serve as, or support, a fixed lower platen.
  • the upper and lower plate members have lateral extensions fixed to the vertical column supported beside the furnace.
  • the column can rotate about its vertical axis and is vertically movable, by means of a hydraulic jack for example.
  • Means, such as a pneumatic or hydraulic ram, for actuating the upper platen are preferably mounted on the upper plate member and one or more piston rods project down through the upper plate memthrough the duct and nozzle into the die.
  • the movable platen carrying on its underside a half-die to cooperate with another half-die on the lower platen is moved into a lowered position for casting in synchronism. with the molten metal injections and is subsequently raised, carrying the cast article, which is cleared in known manner.
  • the jack is operated to raise the vertical column and with it the upper and lower plate members acting as cantilever arms carrying the whole frame. This brings the lower part of the frame clear of the feed duct and it can then be pivoted with the column about the latters axis clear of the furnace. The whole die can then be replaced without anyone having to work over the furnace.
  • FIG. 1 is a part sectional elevation of a die mounting structure in conjunction with a furnace
  • FIG. 2 is a diagrammaic plan view of the structure of FIG. 1,
  • FIGS. 3 to 6 are diagrammatic plan' views of other die mounting structures and furnace arrangements according to the invention.
  • FIG. 7 is a part sectional elevation of the arrangement of FIG. 6, and
  • FIG. 8 is a part sectional elevation of a further die mounting structure and furnace.
  • the die mounting structure of FIG. 1 has a base 1 on which is mounted a furnace 2. This may be of conventional design and will not be described further. Beside the furnace is a pillar 3 upstanding from the base 1 and guiding by means of brackets 4 a vertical column 5 whose lower end is supported by a jack 6. The column 5 can be raised and lowered to a limited extent by this jack and can rotate about its vertical axis.
  • a frame generally designated7 is supported by this column 5 and can be positioned, as shown in full lines in FIG. 2, over the furnace 2, or to one side of the furnace 2 as shown in dotted lines in FIG. 2.
  • the frame 7 comprises a lower plate 8 and an upper plate 9 both substantially rectangular and between which extend vertical guide rods 10.
  • the plates 8 and 9 are held rigidly spaced apart and have re-inforced lateral extensions 8a and 9a respectively whose ends are formed as bosses in which the vertical column 5 enters and is fixed.
  • the frame thus rotates with the column 5 arms supporting the whole frame.
  • An upper platen 11 slides on the guide rods and is actuated by means of a hydraulic or pneumatic cylinder 12 mounted on the upper plate 9.
  • This piston rod 13 of this cylinder extends vertically downwards through the upper plate 9 to connect with the platen 11.
  • the lower plate 8 may serve as a fixed lower platen or have a further platen securely mounted thereon.
  • the upper platen has a range of movement as illustrated between the full and dotted line positions.
  • an upper die member (not shown) is fixed to the underside of the movable platen 11 and a lower die member (also not shown) is fixed on the lower platen 8 and a die setting operation is carried out.
  • a feed duct 14 extends through an opening in the top plate 15 of the furnace and when the frame 7 is swung over the furnace and lowered into an operative position bythe jack 6, the feed duct co-operates with a nozzle 16 leading to the lower half-die. The half-dies are moved repeatedly together and in synchronism with.
  • this molten metal is moved-by gas from the melting pot to the die supported in the die mounting structure.
  • the cast article is carried with it in known manner and removed by conventional means.
  • the devices for supplying gas under pressure to the furnace and the melting pot may be conventionally arranged and are not shown.
  • bosses may be such as to allow the frame to rotate on the column, which need then only be vertically movable.
  • FIGS. 3 to 6 are illustrated in diagrammatic plan view modified die mounting structures and/or modified furnace arrangements. Similar references, with indices where necessary when parts are duplicated, indicate similar parts.
  • the base 1, furnace 2 and supporting pillar 3 are the same, but the die mounting structure comprises two frames 7 and 7 set substantially at right angles. They are rigidly interconnected by webs 8b (not visible) and 9b corresponding to the extensions 8a and 9a.
  • frame 7 or 7 can be set over the single furnace 2 for die casting, while the other frame is swung to one side.
  • the frame 7 is moved to the left hand side when inoperative and the frame 7" to the right hand side.
  • FIG. 4 a column 5 is supported in similar manner between two furnaces 2 and 2" but carries a single frame 7. This can be swung through substantially a 1 arc to co-operate with either furnace as desired. In an intermediate position the frame is clear of both furnaces.
  • This apparatus can be used like the one of FIGS. 1 and 2, with the. beneficial addition of a reserve furnace which can be serviced and recharged while the other is operating.
  • FIG. 5 is in effect a combination of FIGS. 3 and 4, having'two furnaces 2' and 2" and two frames 7 and 7" pivotally supported from a column 5 between the furnaces.
  • the frames being set substantially at right angles can co-operate alternately with the furnaces, frame 7' with furnace 2' (as shown) and frame 7" with furnace 2".
  • the column of FIG. 7 comprises a fixed vertical pillar 17 having an axial bore 18 forming an oil duct, the inlet 19 to which is radial near the base of the column.
  • the duct 18 opens into a cylindrical recess 20 at the top of the pillar 17 which houses a vertically movable piston 21.
  • the piston rod 22 extends upwardly through an end cap 23 to terminate in a thrust bearing 24 which rotatably supports a sleeve 25 by engaging an upper end plate 26 thereof.
  • the sleeve embraces the upper part of the pillar l7 and the interconnecting webs 8c and 9c between the frames, through the centres of which the sleeve is entered, are welded or otherwise secured thereto.
  • the frames 7" and sleeve 25 can pivot through a full 360 about the fixed pillar l7 and can be raised and lowered by the hydraulic jack built-into the top of the pillar.
  • furnaces there could be more than two furnaces and/or more than two die supporting frames pivoted on a common column, the furnaces for example being set in an annular or part annular array with the column at the centre, the radius of the array being such as to allow clear spaces between adjacent furnaces in which to register non-operative die structures.
  • Further possible arrangements are a linear array of furnaces with intermediate columns each carrying single platen units (as of FIGS. 1, 2 and 4), an L-shaped die supporting structure (as of FIGS. 3 and S) or a balance d die supporting structure (as of FIG. 6). Except for the end ones, the furnaces can then each be served by two separate die structures.
  • FIG. 8 there is illustrated apparatus similar to FIG. 7 but with the additional facility of the furnaces, only one of which is shown, being rotatable about the central column.
  • the die supporting structure can be rendered non-rotatable by locking pegs 27 entered through the sleeve 25 and engaging in axially parallel grooves 28 in the pillar 17. These grooves allow the sleeve and die structure to be raised and lowered as before.
  • the furnaces 7" are mounted on a turntable 29 which can rotate about a heightened base 30 of the pillar 17.
  • the outer periphery of the turntable 29 is fitted on the underside with rollers or wheels 31 that run on an annular track 32 centred on the pillar axis and a roller bearing 33 is provided between the base 30 and the surrounding inner periphery of the turntable.
  • furnaces may be supported by jacks.
  • the rotary movement for all embodiments may be motorised, although in most cases it will be practical to swing the die structure and/or furnaces by hand. It will also often be convenient to provide stops for arresting the die structures and furnaces in correct vertical registry.
  • the die supporting structures may be arranged to move in another mode, for example on rails or other linear guides, the die structures to and from a single furnace, or along a row of spaced furnaces and the furnaces below a single die structure or beneath a row of spaced die structures.
  • a low pressure die casting apparatus comprising a furnace, a generally vertical feed duct from the cover thereof, and a die supporting structure for holding a die over the furnace in co-operation with said feed duct, wherein the improvementcomprises a first mounting for the furnace and a second mounting for the die supporting structure laterally clear of and separate from the furnace, and means for moving at least one mounting for vertical engagement and disengagement of the diewith the feed duct and, independently of such vertical movement, for lateral displacement between furnace and die supporting structure in an arc centred on one of said mountings.
  • Apparatus according to claim 1 comprising at least one further furnace carried by the first mounting and co-operable with and disengageable from the die supporting structure, similarly as the first mentioned furnace.
  • Apparatus according to claim 1 wherein the die supporting structure includes a plurality of laterally separate platen units.
  • the die supporting structure includes a single platen unit selectively co-operable with any of said furnaces, said platen operating with an associated furnace another platen unit is laterally clear of its associated furnace.
  • Apparatus according to claim 13 wherein the furnaces are so disposed and the arrangement of the platen units is such that all the platen units co-operate simultaneously with associated furnaces and have intermediate positions clear of said furnaces.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
US00268903A 1971-07-01 1972-07-03 Low pressure die casting apparatus Expired - Lifetime US3804152A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3084771A GB1399838A (en) 1971-07-01 1971-07-01 Metal casting apparatus

Publications (1)

Publication Number Publication Date
US3804152A true US3804152A (en) 1974-04-16

Family

ID=10314076

Family Applications (1)

Application Number Title Priority Date Filing Date
US00268903A Expired - Lifetime US3804152A (en) 1971-07-01 1972-07-03 Low pressure die casting apparatus

Country Status (8)

Country Link
US (1) US3804152A (fr)
JP (1) JPS548166B1 (fr)
CH (1) CH556706A (fr)
DE (1) DE2231856B2 (fr)
FR (1) FR2143924B1 (fr)
GB (1) GB1399838A (fr)
IT (1) IT965869B (fr)
SE (1) SE393548B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964540A (en) * 1974-01-02 1976-06-22 Abraham Edward D Molding system
US4103734A (en) * 1977-05-12 1978-08-01 Evgeny Emelyanovich Mikotin Counterpressure casting arrangement
US5205341A (en) * 1990-02-27 1993-04-27 Starline Manufacturing Company, Inc. Low pressure double arm casting apparatus
EP0811447A1 (fr) * 1996-06-04 1997-12-10 IMR S.r.l. Installation pour la coulée en coquille à basse pression
US5937931A (en) * 1996-08-23 1999-08-17 Kwc Ag Low-pressure die casting plant
CN109500375A (zh) * 2018-12-18 2019-03-22 宁波艾维洁具有限公司 水龙头铸造工艺

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH637856A5 (de) * 1979-03-29 1983-08-31 Karrer Weber & Cie Ag Niederdruck-kokillen-giessmaschine fuer nichteisenmetalle.
DE3168945D1 (en) * 1980-12-23 1985-03-28 Egro Ag Apparatus and process for low-pressure casting
DE4014641A1 (de) * 1990-05-08 1991-11-14 Bayerische Motoren Werke Ag Niederdruck-giessanlage

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD81646A (fr) *
US2847739A (en) * 1951-07-12 1958-08-19 Griffin Wheel Co Casting apparatus
CA644194A (en) * 1962-07-03 R. Powell Edgar Apparatus for casting of metal
US3410332A (en) * 1965-06-07 1968-11-12 Amsted Ind Inc Method and apparatus for casting metals in a controlled atmosphere
DE1949520A1 (de) * 1968-10-02 1970-08-27 Plume Ltd A W Spritzgussmaschine
DE2037652A1 (de) * 1969-08-06 1971-04-08 Renault Einrichtung fur den Niederdruck Kokillenguß
GB1238700A (fr) * 1968-12-21 1971-07-07

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD81646A (fr) *
CA644194A (en) * 1962-07-03 R. Powell Edgar Apparatus for casting of metal
US2847739A (en) * 1951-07-12 1958-08-19 Griffin Wheel Co Casting apparatus
US3410332A (en) * 1965-06-07 1968-11-12 Amsted Ind Inc Method and apparatus for casting metals in a controlled atmosphere
DE1949520A1 (de) * 1968-10-02 1970-08-27 Plume Ltd A W Spritzgussmaschine
GB1238700A (fr) * 1968-12-21 1971-07-07
DE2037652A1 (de) * 1969-08-06 1971-04-08 Renault Einrichtung fur den Niederdruck Kokillenguß

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964540A (en) * 1974-01-02 1976-06-22 Abraham Edward D Molding system
US4103734A (en) * 1977-05-12 1978-08-01 Evgeny Emelyanovich Mikotin Counterpressure casting arrangement
US5205341A (en) * 1990-02-27 1993-04-27 Starline Manufacturing Company, Inc. Low pressure double arm casting apparatus
EP0811447A1 (fr) * 1996-06-04 1997-12-10 IMR S.r.l. Installation pour la coulée en coquille à basse pression
US6059011A (en) * 1996-06-04 2000-05-09 Imr S.P.A. Low pressure die-casting plant with improved production capacity
US5937931A (en) * 1996-08-23 1999-08-17 Kwc Ag Low-pressure die casting plant
CN109500375A (zh) * 2018-12-18 2019-03-22 宁波艾维洁具有限公司 水龙头铸造工艺
CN109500375B (zh) * 2018-12-18 2021-04-16 宁波艾维洁具有限公司 水龙头铸造工艺

Also Published As

Publication number Publication date
DE2231856B2 (de) 1978-07-06
IT965869B (it) 1974-02-11
FR2143924A1 (fr) 1973-02-09
JPS548166B1 (fr) 1979-04-13
FR2143924B1 (fr) 1978-01-13
SE393548B (sv) 1977-05-16
GB1399838A (en) 1975-07-02
DE2231856A1 (de) 1973-01-11
CH556706A (fr) 1974-12-13

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