US3595301A - Method of making intricate die castings - Google Patents

Method of making intricate die castings Download PDF

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Publication number
US3595301A
US3595301A US787118A US3595301DA US3595301A US 3595301 A US3595301 A US 3595301A US 787118 A US787118 A US 787118A US 3595301D A US3595301D A US 3595301DA US 3595301 A US3595301 A US 3595301A
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US
United States
Prior art keywords
die
machine
casting
core
parts
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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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US787118A
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English (en)
Inventor
Alfred F Bauer
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.)
Farley Metals Inc
NL Industries Inc
Original Assignee
Nat Lead Co
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Filing date
Publication date
Application filed by Nat Lead Co filed Critical Nat Lead Co
Application granted granted Critical
Publication of US3595301A publication Critical patent/US3595301A/en
Assigned to FARLEY METALS, INC. reassignment FARLEY METALS, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: NL INDUSTRIES, INC. A NJ CORP.
Assigned to NATWEST USA CREDIT CORP. reassignment NATWEST USA CREDIT CORP. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FARLEY METALS, INC.,
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/058—Undercut

Definitions

  • PATENTEDJULZTISYI SHEET 1 3,595,301
  • This invention relates to a method of repeatedly making intricate diecastings and is particularly directed to a method in which a greatly simplified die apparatus is used.
  • complex diecastings will usually include various parts having widely different wall thicknesses.
  • the fins and grooves result in sections that are long and thin while the base from which thefins extend or into which the grooves are formed are, by comparison,
  • the present invention eliminates all cooling problems by providing a die which is completely removed from the machine at each casting operation or each shot, disassembled, precooled or preheated and reassembled and reinserted into the machine for the next shot.
  • the present invention broadly comprises a method in which a plurality of die core and impression elements are provided; such die elements are lubricated and brought to a proper preselected temperature, and assembled into a unitary die structure; the unitary die structure is then inserted into or between the platens of a substantially standard diecasting machine, the machine closed and the shot is thereafter made.
  • the operator of the machine in which the method of the present invention is employed is not required to insert loose pieces in a die fixed'to the machine plates and is thus relieved from the unpleasant task of working in a hot space between the die plates when the machine is open.
  • FIG. 1 is a somewhat diagrammatic view, in exploded form, of a plurality of die core and impression elements necessary to make a casting, prior to assembly, shown inassoeiation with a completed casting;
  • FIG. 2 is a fragmentary sectional view of a diecasting machine, with parts broken away, into which the assembled die elements shown in FIG. I have been loaded;
  • FIG. 3 is a fragmentary view of the opened die casting machine and assembled die elements during loading prior to a diecastin g operation.
  • the drawings illustrate sequentially the principal steps of the method of the present invention.
  • the disclosure is related to the diecasting of a finned part cored on mutually perpendicular axes,.this hypothetical part having been chosen for illustration because of the varying wall thicknesses involved and because the part is such that it would normally require side cores, and further because'the part would normally require carefully related cores that are difficult to cool evenly and are somewhat liable to being broken in service.
  • the part is such that it would be virtually impossible to produce it with known diecasting methods and apparatus.
  • FIG. I of the drawings illustrates, in general, the parts that would be necessary to form the finned and cored part.
  • an impression plate 10 may be taken as the element to which the remaining core parts are related.
  • the plate 10 is provided with a center core element 11 and is associated with side core elements 12 and 13 which cooperate to complete a circular core which will form a stepped bore from end to end of the casting.
  • the center core element 11 forms a bore entering one side of the casting and intersecting the bore formed by the side core elements 12 and 13 on mutually perpendicular axes.
  • the casting is such that finned areas are required with the angle of the fins converging towards a center area having fins normal to the parting line of .the casting.
  • the finned parts are formed by three die sections, 15, 16 and 17.
  • upper and lower passages 19 and 20 are required to be formed in a wall thereof opposite the finned area. These passages are formed by core pins 21 and 22 which are held in the impression plate 10 and extend into the cavity on diverging axes. The pins must be removed before the casting can be released from the die. In a conventional machine where the casting is removed in a path along the axis of the machine, there is no way in which core pins can be used to form diverging or converging passages of the form shown. With the present invention, however, the formation of such passages becomes a simple matter because the core pins are assembled and removed from the impression plate 10 outside the diecasting machine.
  • the unitary assembly now designated 30 in FIG. 2, is placed, by any suitable loading device, into a diecasting machine.
  • a conventional diecasting machine is shown in FIGS. 2 and 3 and includes a stationary platen 31 anda movable platen 32 operated, in the usual manner, by a conventional operating cylinder (not shown).
  • a conventional ejection pin operating plate is carried intermediate the ends of the machine and is operated by an ejection cylinder (not show). The ejection cylinder and ejection pin plate operate to move ejection pins 38, 39 forwardly to move the entire assembly 30 out of the machine, into the position shown in FIG. 3, at the completion of the casting portion of the cycle.
  • a dieholder 40 which would normally be a portion of the cover die of a machine is fixed to the stationary plate 31 and a second dieholder 41 is fixed to the movable machine platen 32. Under normal circumstances the dieholder 41 would comprise the ejector die half and would be provided with a die cavity and all of the usual cooling lines necessary to maintain the parts at the desired temperature.
  • a shot sleeve 42 is fixed to the stationary machine plate 31 and extends through the machine plate and the dieholder 40.
  • the shot sleeve terminates in the usual sprue opening 43 which, in turn, communicates with a sprue passage 44 in the base plate 10, the passage extending upwardly into the die space around the core 11 and between the core 11 and the remainder of the die elements when the latter are in assembled position as indicated in FIGS. 2 and 3.
  • metal can be ladled into the shot sleeve 42, forced into the die in the normal manner by an appropriate shot plunger and the casting completed under the usual very high diecasting pressures.
  • These pressures may be from 2,000 to 8,000 p.s.i.
  • the entire assembly is ejected from the machine as indicated in FIG. 3.
  • the assembled die elements 30 are shown with the casting therein.
  • the die elements When the assembled die elements and casting have been removed from the machine, the die elements are disassembled as shown in FIG. 1 to remove from the die elements the now completed casting which is indicated at 45.
  • the manner ofdisassembly is also indicated in HO. 1.
  • the die elements come apart in four directions.
  • the central fin forming die part 17 may be first removed, after which the companion fin die parts 15 and 16 will come out without interference.
  • the core pins 21 and 22 may be withdrawn sequentially from their openings in the plate 10.
  • the impression plate 10 may be pulled back, and the upper and lower die elements 12 and 13 withdrawn finally to free the casting.
  • the die elements l0, l2, l3, l5, 16, 17, 21 and 22 may then be placed in a lubricant bath maintained at an appropriate temperature.
  • the lubricant bath may be held at a temperature of, for example, 300 F. and a lubricant in the form of a graphite suspension may be contained in the bath.
  • the die elements will tend to assume the temperature of the bath and will have deposited thereon a thin coating of lubricant.
  • the parts are removed from the heating bath and are dried and subsequently assembled as described above in connection with FIG. I.
  • the present invention provides for the diecasting of intricate parts and for the elimination of core pulls normally present in such diecastings.
  • the intricate cavity is made up by a plurality of associated die pieces which are ejected from the die with the casting.
  • the die pieces, cores and cavity impressions may be removed in the steps indicated in FIG. 3 of the drawings by appropriate mechanical, pneumatic or hydraulic forces and may be loosened from the die parts by sonic or ultrasonic vibration so that the casting is susceptible of separation from the die parts by a relatively small force.
  • the present invention eliminates the extremely complicated water cooling system which adds materially to present day die costs and is extremely costly to maintain.
  • the water cooling holes that are presently drilled into a die are limited by the shape of the die parts, by the location of ejector pins, core openings and set-in pieces so that the present water cooling system is never perfect and results in uneven temperatures and residual stresses which cause heat checking of the die steels.
  • the conventional water cooling system is replaced by the present invention by a simple immersion of the parts on a predetermined time cycle as discussed above.
  • Another important advantage of the present invention is that in many large dies there are small cores located in the cover die or the ejector die or on one of the side cores which can be replaced only by taking the entire die apart which may consume hours or even days of time.
  • a particular core part fails it can be replaced instantly during the next assembly operation since the present invention contemplates that spare die parts are always available inasmuch as continuous operation of the method of the present invention will require that one complete die be in the process of assembly, another be in place in a machine and a third be in the process of extraction of the casting.
  • the present invention eliminates all angular mechanical core pulls located in the machine so that the diecasting machine itselfcan be much less complicated.
  • the method of'repeatedly making intricate diecastings comprising the steps of assembling a group of separable die cores and impression members into a unitary die member having therein at least one complete die cavity, inserting said unitary die member between the platens of a diecasting machine, closing the platens of said machine to maintain the parts of said unitary die member in assembled relation, injecting metal under high pressure into said die member to form a cast object, removing said die member with said cast object therein from the diecasting machine, disassembling said die member to remove the cast object therefrom and to separate said die cores and impression members, and reassembling said group of separable die cores and impression members for repetition ofsaid steps.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
US787118A 1968-12-26 1968-12-26 Method of making intricate die castings Expired - Lifetime US3595301A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78711868A 1968-12-26 1968-12-26

Publications (1)

Publication Number Publication Date
US3595301A true US3595301A (en) 1971-07-27

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ID=25140465

Family Applications (1)

Application Number Title Priority Date Filing Date
US787118A Expired - Lifetime US3595301A (en) 1968-12-26 1968-12-26 Method of making intricate die castings

Country Status (9)

Country Link
US (1) US3595301A (de)
BE (1) BE743676A (de)
BR (1) BR6915535D0 (de)
CH (1) CH497934A (de)
DE (1) DE1963102A1 (de)
FR (1) FR2027151A1 (de)
GB (1) GB1273066A (de)
NL (1) NL6918993A (de)
SE (1) SE357146B (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889921A (en) * 1973-05-28 1975-06-17 Ciba Geigy Corp Mould for article with circumferential undercut flanges
US3973617A (en) * 1975-04-28 1976-08-10 Curtiss-Wright Corporation Method and apparatus for cooling diecasting mold
US4420297A (en) * 1981-04-27 1983-12-13 Usm Corporation Retractable apparatus for shoe sole molds
US5078202A (en) * 1990-09-17 1992-01-07 Doehler-Jarvis Limited Partnership Floating wedge lock for slide on movable die
US5104606A (en) * 1989-12-05 1992-04-14 Donoghue Robert J Method of molding a one-piece measuring and dispensing apparatus
US5204127A (en) * 1991-05-10 1993-04-20 Composite Products, Inc. Compression molding apparatus
US5498387A (en) * 1993-06-29 1996-03-12 The Vendo Company Method of manufacturing a helical structure
US5595702A (en) * 1992-12-25 1997-01-21 Toska Co., Ltd. Method of and apparatus for molding synthetic resin screws
US6039558A (en) * 1997-09-29 2000-03-21 Samsung Electronics Co., Ltd. Mold for injection molding of a plastic product
WO2001020657A1 (en) * 1999-09-10 2001-03-22 Sony Computer Entertainment Inc. Heat sink manufacturing device and manufacturing method
US6427755B1 (en) 1997-10-20 2002-08-06 Chipless Metals Llc Method of making precision casting using thixotropic materials
US6564856B1 (en) 1997-10-20 2003-05-20 Chipless Metals Llc Method of making precision castings using thixotropic materials
US20060091086A1 (en) * 2003-03-07 2006-05-04 Canty Mark E Rack-mountable cable manager
US20070000634A1 (en) * 2002-03-28 2007-01-04 Delta Electronics, Inc. Heat-dissipating device and its manufacturing process
US20080078522A1 (en) * 2006-09-29 2008-04-03 Hyundai Motor Company Die casting mold for forming inclined hole in cylinder block
US7951320B1 (en) 2005-02-24 2011-05-31 Kitisis Corporation Method of molding a bulkhead fitting
DE102013000320A1 (de) * 2013-01-10 2014-07-10 Audi Ag Werkzeugvorrichtung für die Herstellung eines Gussbauteils

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951586A1 (de) * 1979-12-21 1981-07-02 Skf Kugellagerfabriken Gmbh Waelzlager fuer laengsbewegungen einer welle
JPS60215117A (ja) * 1984-04-10 1985-10-28 日本ノ−シヨン工業株式会社 合成樹脂製のなす環及びその製造方法
KR860002128B1 (ko) * 1984-07-10 1986-12-11 닛봉 노-숀 고오교오 가부시키 가이샤 회전 스냅훅 및 그 제조방법
DE4432163A1 (de) * 1994-09-09 1996-03-14 Laepple August Gmbh & Co Vorrichtung zum Herstellen von Spritzguss-Formteilen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1999961A (en) * 1932-08-03 1935-04-30 John R Daesen Method and apparatus for die casting
US2017216A (en) * 1930-08-14 1935-10-15 Margon Corp Apparatus for plastic molding
US3315315A (en) * 1963-03-02 1967-04-25 Triulzi Giuseppe Device in injecting and molding presses for handling heavy articles
US3364981A (en) * 1964-09-29 1968-01-23 Dynacast Int Ltd Die casting machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2017216A (en) * 1930-08-14 1935-10-15 Margon Corp Apparatus for plastic molding
US1999961A (en) * 1932-08-03 1935-04-30 John R Daesen Method and apparatus for die casting
US3315315A (en) * 1963-03-02 1967-04-25 Triulzi Giuseppe Device in injecting and molding presses for handling heavy articles
US3364981A (en) * 1964-09-29 1968-01-23 Dynacast Int Ltd Die casting machine

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889921A (en) * 1973-05-28 1975-06-17 Ciba Geigy Corp Mould for article with circumferential undercut flanges
US3973617A (en) * 1975-04-28 1976-08-10 Curtiss-Wright Corporation Method and apparatus for cooling diecasting mold
US4420297A (en) * 1981-04-27 1983-12-13 Usm Corporation Retractable apparatus for shoe sole molds
US5104606A (en) * 1989-12-05 1992-04-14 Donoghue Robert J Method of molding a one-piece measuring and dispensing apparatus
US5078202A (en) * 1990-09-17 1992-01-07 Doehler-Jarvis Limited Partnership Floating wedge lock for slide on movable die
US5204127A (en) * 1991-05-10 1993-04-20 Composite Products, Inc. Compression molding apparatus
WO1994022651A1 (en) * 1991-05-10 1994-10-13 Prusha Thomas J Compression molding tool
US5595702A (en) * 1992-12-25 1997-01-21 Toska Co., Ltd. Method of and apparatus for molding synthetic resin screws
US5837182A (en) * 1992-12-25 1998-11-17 Toska Co., Ltd. Method of molding synthetic resin screws
US5498387A (en) * 1993-06-29 1996-03-12 The Vendo Company Method of manufacturing a helical structure
CN1082429C (zh) * 1997-09-29 2002-04-10 三星电子株式会社 用于塑料注模的模具
US6039558A (en) * 1997-09-29 2000-03-21 Samsung Electronics Co., Ltd. Mold for injection molding of a plastic product
US6427755B1 (en) 1997-10-20 2002-08-06 Chipless Metals Llc Method of making precision casting using thixotropic materials
US6564856B1 (en) 1997-10-20 2003-05-20 Chipless Metals Llc Method of making precision castings using thixotropic materials
WO2001020657A1 (en) * 1999-09-10 2001-03-22 Sony Computer Entertainment Inc. Heat sink manufacturing device and manufacturing method
US6516867B1 (en) 1999-09-10 2003-02-11 Sony Computer Entertainment Inc. Heat sink manufacturing device and manufacturing method
US20070000634A1 (en) * 2002-03-28 2007-01-04 Delta Electronics, Inc. Heat-dissipating device and its manufacturing process
US7401638B2 (en) * 2002-03-28 2008-07-22 Delta Electronics, Inc. Heat-dissipating device and its manufacturing process
US20060091086A1 (en) * 2003-03-07 2006-05-04 Canty Mark E Rack-mountable cable manager
US7378046B2 (en) * 2003-03-07 2008-05-27 Panduit Corp. Method of molding rack-mountable cable manager
US7951320B1 (en) 2005-02-24 2011-05-31 Kitisis Corporation Method of molding a bulkhead fitting
US20080078522A1 (en) * 2006-09-29 2008-04-03 Hyundai Motor Company Die casting mold for forming inclined hole in cylinder block
DE102013000320A1 (de) * 2013-01-10 2014-07-10 Audi Ag Werkzeugvorrichtung für die Herstellung eines Gussbauteils
DE102013000320B4 (de) 2013-01-10 2018-10-31 Audi Ag Werkzeugvorrichtung für die Herstellung eines Gussbauteils

Also Published As

Publication number Publication date
CH497934A (de) 1970-10-31
BR6915535D0 (pt) 1973-03-29
SE357146B (de) 1973-06-18
BE743676A (de) 1970-05-28
NL6918993A (de) 1970-06-30
FR2027151A1 (de) 1970-09-25
DE1963102A1 (de) 1970-07-09
GB1273066A (en) 1972-05-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: FARLEY METALS, INC., 233 SOUTH WACKER DRIVE, CHICA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:NL INDUSTRIES, INC. A NJ CORP.;REEL/FRAME:004217/0800

Effective date: 19831212

AS Assignment

Owner name: NATWEST USA CREDIT CORP.

Free format text: SECURITY INTEREST;ASSIGNOR:FARLEY METALS, INC.,;REEL/FRAME:004739/0041

Effective date: 19870729