EP0061532B1 - Druckgiessmaschine - Google Patents

Druckgiessmaschine Download PDF

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Publication number
EP0061532B1
EP0061532B1 EP81110378A EP81110378A EP0061532B1 EP 0061532 B1 EP0061532 B1 EP 0061532B1 EP 81110378 A EP81110378 A EP 81110378A EP 81110378 A EP81110378 A EP 81110378A EP 0061532 B1 EP0061532 B1 EP 0061532B1
Authority
EP
European Patent Office
Prior art keywords
casting
space
pressure
pipe
valve
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
Application number
EP81110378A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0061532A1 (de
Inventor
Ivan Dimov Dipl.-Ing. Nikolov
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.)
INSTITUT PO METALOSNANIE I TECHNOLOGIA NA METALITE
Original Assignee
INSTITUT PO METALOSNANIE I TECHNOLOGIA NA METALITE
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 INSTITUT PO METALOSNANIE I TECHNOLOGIA NA METALITE filed Critical INSTITUT PO METALOSNANIE I TECHNOLOGIA NA METALITE
Priority to AT81110378T priority Critical patent/ATE19975T1/de
Publication of EP0061532A1 publication Critical patent/EP0061532A1/de
Application granted granted Critical
Publication of EP0061532B1 publication Critical patent/EP0061532B1/de
Expired 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
    • B22D18/08—Controlling, supervising, e.g. for safety reasons
    • 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
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
    • B22D17/06—Air injection machines
    • 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

  • the invention relates to a die casting machine for carrying out a die casting process in which the melt is conveyed from a chamber hermetically closed by a lid in a container via a material line into a mold connected to it, fills it and in it, as a result of the effect of a pressure or a pressure difference solidifies, in which a gas pressure with the same gas phase as in the hermetically sealed chamber is generated via a first connecting line with a first valve immediately after the casting mold or after the solidification of the melt in the casting mold over the melt in the material line, and in which before the start of the next casting process, the space of the casting mold is flushed with the gas phase in the material line and in the hermetically sealed chamber, the material line and the casting mold being carried by an intermediate plate and a slide bed is provided in which a flat slide is provided is slidably arranged to open and close the material line.
  • the container holding the melt is located in a housing which is sealed on its upper side by the intermediate plate.
  • the one-piece material line which protrudes into the container for the melt, has a valve above the melt, but below the slide, with which the interior of the housing can be connected to or separated from the material line.
  • the housing and the intermediate plate as well as the jacket surrounding the casting mold and arranged on the intermediate plate have a permanent spatial assignment.
  • the known die casting machine requires a housing for the enclosure of the container that holds the melt, which means a great expenditure on equipment.
  • the arrangement and actuation of the slide in the slide bed is exposed to splashes of melt, so that the function of the slide in the bed is not guaranteed with certainty after several working cycles. Similar difficulties also arise with regard to the actuation of the valve on the material line.
  • the object underlying the invention is to design the die casting machine of the type mentioned in such a way that the disadvantages mentioned are avoided and a die casting machine is created in which, while maintaining the casting process in a protective atmosphere without an additional jacket for the container for the melt, a residue free of melt Separation of the mold and the melt container and a freeing of the associated functional parts of melt remnants is guaranteed.
  • the material line is formed by a main pouring tube and an additional pouring tube
  • the main pouring tube has an extension on the casting mold side in which the additional pouring tube is arranged, while the main pouring tube is closed by a flange cover through which it is connected to the intermediate plate, a neck being formed in the lid of the hermetically sealed chamber, to which a cylinder is attached, which is arranged in a jacket and to which the main pouring tube is fastened, the jacket on the intermediate plate is mounted and is provided with the slide bed, the flat slide is connected to a horizontal hydraulic cylinder.
  • the jacket is expediently connected to the outer surface of the cylinder via a sliding seal.
  • the space between the cylinder and the jacket can be connected to the space of the hermetically sealed chamber via a second pipeline with a second valve, a pressure measuring device being provided.
  • the mold is closed by a hermetically sealing lid which is mounted on the intermediate plate and is connected to a vertical cylinder, the space of the main pouring tube being the space of the hermetically sealed chamber and the space of the hermetically sealing lid being connected via a third pipe to a third Valve and a fourth valve is connected.
  • a differential pressure measuring device is provided.
  • the space of the hermetically sealing cover is additionally connected to the space between the jacket and the cylinder via a fifth pipeline with a fifth valve.
  • a lever mechanism which is connected to a third vertical hydraulic cylinder, can be mounted on the main pouring tube, a depression being formed in the bottom of the hermetically sealed chamber with the melt container.
  • the die casting machine has the advantage that a complete protection of the melt in the material line against the influence of the external environment or the gas in the casting mold is achieved, which ensures the production of high quality castings.
  • the mold can be flushed out before each pour, with the same gas that is supplied to the container for the melt.
  • the gas consumption for generating and maintaining a pressure in the container for the melt is reduced. This consumption includes only the gas that is expelled from the melt when the mold is filled, and the gas for purging or blowing through the mold.
  • the partial pressures of the gases that are in the gas phase in the container for the melt and in the material line are the same and practically do not change with each other following manufacture of castings. This allows an optimum amount of gas and other components dissolved in the melt to be achieved, especially if these components have a high vapor pressure or dissociation pressure at the casting temperature.
  • the partial pressure of a given active alloy gas can be increased or decreased simultaneously in the melt container, in the material line and in the mold. This affects the structure formation and ensures the formation of a solid solution of the alloying gas in the casting in accordance with the sudden change in its solubility in the phase transition between the solid and liquid state, which is the case with all successive castings of a melt batch in the melt container. There are no level fluctuations in the melt in the material line, which ensures complete control of the filling of the mold with the melt.
  • the machine shown in FIGS. 1 and 3 has a hermetically sealed chamber 1, in which a container 2 for the melt 3 is arranged.
  • the hermetically sealed chamber 1 is closed with a cover 4 on which a neck 41 is formed.
  • a cylinder 5 is mounted on the neck 41, and an inner flange 51 is formed at the upper end thereof.
  • the hermetically sealed chamber 1 is connected to the mold 13 by a material line.
  • the material line consists of two separate pouring tubes, namely a main pouring tube 6 and an additional pouring tube 18.
  • the main pouring tube 6 is provided with an extension 61 in which the additional pouring tube 18 is arranged.
  • the main pouring tube 6 is closed with a flange cover 7, via which it is connected to the intermediate plate 12.
  • the flange cover 7 is provided with an opening 71.
  • On the lower surface of the intermediate plate 12, a jacket 8 is mounted, in which the cylinder 5 is arranged.
  • the jacket 8 is connected to the outer surface of the cylinder 5 via a sliding seal 9.
  • the jacket 8 is provided with a slide bed 81, in which a flat slide 10 is arranged, which is connected to a horizontal hydraulic cylinder 11.
  • the casting mold 13 is arranged on the intermediate plate 12.
  • the additional pouring tube 18 is attached to the casting mold 13.
  • the mold 13 is closed by the hermetic cover 19, which is mounted on the intermediate plate 12 and is connected to a first vertical hydraulic cylinder 20.
  • the hermetic cover 19 consists of two parts, namely an upper part 191 and a lower cylindrical part 192.
  • the intermediate plate 12 is fastened via supporting columns 14 to a crossbeam 15 which is connected to the piston of a second vertical hydraulic cylinder 16.
  • the first vertical hydraulic cylinder 20 is fastened to the crossbar 15, while the second vertical hydraulic cylinder 16 is fastened to a support 17.
  • the space of the main pouring tube 6 is connected to the space of the hermetically sealed chamber 1 via a first pipeline with a first valve f.
  • the space between the cylinder 5 and the jacket 8 is connected to the space of the hermetically sealed chamber 1 by a second pipeline with a second valve f, a pressure measuring device M being provided.
  • the space of the hermetic cover 19 and the space of the hermetically sealed chamber 1 are connected via a third pipeline with a third valve g, a fourth valve g, a differential pressure measuring device M being provided.
  • the space of the hermetic cover 19 is connected via a fifth pipe with a fifth valve c to the space between the jacket 8 and the cylinder 5.
  • a lever mechanism 21 is mounted on the main pouring tube 6, which is provided for its movement in the vertical direction and is connected to a third vertical hydraulic cylinder 22.
  • a recess 23 is formed in the bottom of the container 2 for the melt 3.
  • the room in The hermetically sealed chamber 1 with the container 2 for the melt 3 is filled with sulfur dioxide or argon or a mixture of these gases at a desired pressure.
  • the valve f is open and the pressure of the gas in the space of the hermetically sealed chamber 1 and in the space of the main pouring tube 6 above the melt 3 is balanced, its value being read on the differential pressure measuring device M, namely with the valve g open and the valve g closed i .
  • the valves a, b, c, d, f 1 are closed.
  • the hermetic lid 19 is closed together with the upper part of the mold 13 by moving downwards, which is generated by the first vertical hydraulic cylinder 20, the closed space being hermetically sealed.
  • the valves b and c are opened, after which the space under the hermetic cover 19 is filled with nitrogen until the pressure in the hermetically sealed chamber 1 is equalized. This is indicated by the zero display of the differential pressure measuring device M.
  • valve b is closed. There follows a signal for the movement of the intermediate plate 12 in its upper end position, after which the flat slide 10 is opened while the second vertical hydraulic cylinder 16 moves the intermediate plate 12 downwards until it rests on the elastic seal on the flange cover 7 of the main pouring tube 6.
  • a signal follows for the closing of the valves c, and g and the opening of the valve a, which controls the desired pouring process, and the valves f, and g l .
  • the pressure in the hermetically sealed chamber 1 begins to rise.
  • the melt 3 begins to rise in the main pouring tube 6 and forces the sulfur dioxide or argon located there in front of it.
  • the differential pressure measuring device M shows a small overpressure due to the throttling action in the ventilation channels of the mold 13.
  • the melt 3 reaches the lower end of the additional pouring tube 18, it rises further into this tube, forcing the lighter nitrogen out of the casting mold 13 and replaces it with the sulfur dioxide or argon flowing in front of it, while the melt in the space between the two pouring tubes compresses the sulfur dioxide or argon enclosed in it.
  • the casting mold 13 is filled with melt which is in practically continuous contact with protective gas in the form of sulfur dioxide or argon.
  • the differential pressure measuring device M shows the increase in pressure as a function of time according to a law that is specific to the configuration of the mold cavity 13.
  • the pointer of the differential pressure measuring device M begins to deviate rapidly and, upon reaching a predetermined specific size for the displayed pressure difference, gives a signal for the closing of the valve a.
  • the valve f is opened at the same time as the valve a is closed, with a rapid equalization of the pressures occurring in the space of the main pouring tube 6 and in the space of the container 2.
  • the level of the melt in the space between the main pouring tube 6 and the additional pouring tube 18 drops.
  • the protective gas in the form of sulfur dioxide or argon which has the same composition as in the container 2 for the melt 3, enters the additional pouring tube 18 and the casting mold 13 and from there forces the melt out is below the level of the feed.
  • the horizontal hydraulic cylinder 11 for moving the flat slide 10 upwards can be actuated immediately, the additional pouring tube 18 being pulled out of the extension 61 of the main pouring tube 6.
  • valves c and C1 are opened, as a result of which the pressure in the space around the mold 13 and in the space between the cylinder 5 and the jacket 8 is reduced, the nitrogen escaping from the space of the mold 13 .
  • Sulfur dioxide or argon continues to act in the space between the cylinder 5 and the jacket 8, namely at a pressure which is balanced with the external atmospheric pressure.
  • the pressure gauges M and M 1 show zero display.
  • the valve g 1 is closed, the valve g is opened, the differential pressure measuring device M being switched on to display the pressure in the container 2 for the melt 3.
  • Valves c and C1 are normally closed.
  • the opening of the outlet pipeline after the valve C1 is raised above the level of the intermediate plate 12, which does not allow air to enter the space between the cylinder 5 and the jacket 8 during the opening of the mold 13. If necessary, the valve C1 can remain closed during the opening of the mold 13.
  • the layer of heavier protective gas in the room from the feed to the lower end of the additional pouring tube 18 also does not allow air to enter the room between the cylinder 5, the jacket 8 and the intermediate plate 12.
  • the upper part of the casting mold is opened and the finished casting is removed, after which the casting mold 13 is prepared for the next casting.
  • the exemplary embodiment described also applies to casting under low pressure or vacuum, the container 2 for the melt remaining under constant pressure, the same gas acting above the level of the melt 3 in the container 2 and in the main pouring tube 6.
  • the container 2 for the melt 3 can also be moved vertically with a view to pressing the flat slide 10 against the elastic seal of the flange 7 of the main pouring tube 6 and pulling out the additional pouring tube 18 from the extension 61 of the main pouring tube 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Dental Prosthetics (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
EP81110378A 1980-12-11 1981-12-11 Druckgiessmaschine Expired EP0061532B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81110378T ATE19975T1 (de) 1980-12-11 1981-12-11 Druckgiessmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BG8049948A BG33467A1 (en) 1980-12-11 1980-12-11 Method and machine for castind under presure
BG49948/80 1980-12-11

Publications (2)

Publication Number Publication Date
EP0061532A1 EP0061532A1 (de) 1982-10-06
EP0061532B1 true EP0061532B1 (de) 1986-05-28

Family

ID=3908303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81110378A Expired EP0061532B1 (de) 1980-12-11 1981-12-11 Druckgiessmaschine

Country Status (21)

Country Link
US (1) US4550763A (ro)
EP (1) EP0061532B1 (ro)
JP (1) JPS57127568A (ro)
AR (1) AR230012A1 (ro)
AT (1) ATE19975T1 (ro)
AU (1) AU550563B2 (ro)
BG (1) BG33467A1 (ro)
BR (1) BR8108037A (ro)
CA (1) CA1181923A (ro)
CS (1) CS271101B2 (ro)
DD (1) DD202253A5 (ro)
DE (1) DE3174743D1 (ro)
DK (1) DK152178C (ro)
ES (1) ES507780A0 (ro)
HU (1) HU185073B (ro)
IN (1) IN156285B (ro)
NO (1) NO157326C (ro)
PL (1) PL132008B1 (ro)
RO (1) RO84863B (ro)
SU (1) SU1287976A1 (ro)
YU (1) YU43907B (ro)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583321B1 (fr) * 1985-06-18 1987-09-18 Etude Dev Metallurg Procede de coulee sous basse pression isostatique et machine pour sa mise en oeuvre
FR2615768A1 (fr) * 1987-05-27 1988-12-02 Centre Nat Rech Scient Procede de moulage en coquille, notamment metallique, et dispositif et coquille s'y rapportant
FR2616363B1 (fr) * 1987-06-11 1991-04-19 Cegedur Procede et dispositif de moulage en sable de pieces composites a matrice en alliage leger et insert fibreux
US5042561A (en) * 1988-03-30 1991-08-27 Hitchiner Manufacturing Co., Inc. Apparatus and process for countergravity casting of metal with air exclusion
JPH0314713A (ja) * 1989-06-12 1991-01-23 Nissan Motor Co Ltd 能動型サスペンション
FR2666037B1 (fr) * 1990-08-27 1995-01-27 Pont A Mousson Installation de positionnement et de serrage de moules de fonderie.
DK77694A (da) * 1994-06-29 1995-12-30 Dansk Ind Syndikat Fremgangsmåde og indretning til ved udstøbning mod tyngdekraften af støbeforme, især vådsandforme, med navnlig letoxiderbare metaller eller metallegeringer af afslutte støbeprocessen
NO304893B1 (no) * 1997-07-07 1999-03-01 Norsk Hydro As FremgangsmÕte for smelting av magnesium uten flussmiddel og utstyr for dette
US20160158837A1 (en) * 2014-12-06 2016-06-09 Soliden, LLC Sand casting device and associated method with improved mechanical properties
CN105268951A (zh) * 2015-02-05 2016-01-27 天津新伟祥工业有限公司 负压上吸浇注方法
HUE039983T2 (hu) * 2015-02-17 2019-02-28 Mei Ta Ind Co Ltd Negatív nyomású, felfelé áramlású öntési eljárás
CN106563787A (zh) * 2015-10-12 2017-04-19 天津达祥精密工业有限公司 负压上吸浇注装置
CN109290545A (zh) * 2018-12-07 2019-02-01 蚌埠隆华压铸机有限公司 一种避免铸件产生气泡的卧式压铸机
CN114226690A (zh) * 2021-11-20 2022-03-25 河南信持睿电气设备有限公司 一种用于铝合金差压铸造的控制方法及铸造装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
FR1525455A (fr) * 1965-11-02 1968-05-17 Babcock & Wilcox Co Tubes de coulée sous pression
GB1261753A (en) * 1968-04-05 1972-01-26 Inst Po Metalloznanie I Tekno A method of and apparatus for casting a material of which at least part evaporates or dissociates intensively at pouring temperature
US3650313A (en) * 1968-10-09 1972-03-21 Inst Po Metalloznanie I Tekno Method for the production of castings from alloys of metals and gases
US3635791A (en) * 1969-08-04 1972-01-18 Gen Motors Corp Pressure pouring in a vacuum environment
BE786990A (fr) * 1971-08-02 1973-01-31 Pechiney Aluminium Appareillage pour le moulage de couches minces
SU461798A1 (ru) * 1973-01-04 1975-02-28 Горьковский Проектно-Конструкторский Технологический Институт Устройство дл лить под низким давлением
BG18798A1 (ro) * 1973-01-11 1975-03-20
US3862656A (en) * 1973-02-16 1975-01-28 Aurora Metal Corp Method and apparatus for vacuum casting of metal
FR2270037B1 (ro) * 1974-05-10 1979-04-06 Pechiney Aluminium
DE2437734A1 (de) * 1974-08-06 1976-02-26 Merkur Gmbh Metallwerk Niederdruck-giessvorrichtung fuer magnesium
SU616061A1 (ru) * 1975-02-25 1978-07-25 Научно-Исследовательский Институт Специальных Способов Литья Установка лить с противодавлением
FR2378591A1 (fr) * 1977-01-28 1978-08-25 Buscher Kg Conduit elevateur pour la coulee de metaux sous la pression d'un gaz
DE2947602A1 (de) * 1979-10-30 1981-05-14 BBC AG Brown, Boveri & Cie., Baden, Aargau Niederdruck-giessverfahren und niederdruck-giessvorrichtung fuer sauerstoffempfindliche gusswerkstoffe

Also Published As

Publication number Publication date
NO814223L (no) 1982-06-14
BG33467A1 (en) 1983-03-15
NO157326B (no) 1987-11-23
NO157326C (no) 1988-03-02
AU550563B2 (en) 1986-03-27
EP0061532A1 (de) 1982-10-06
YU43907B (en) 1989-12-31
ES8307557A1 (es) 1983-07-01
CS271101B2 (en) 1990-08-14
JPS57127568A (en) 1982-08-07
PL234128A1 (ro) 1982-08-02
CA1181923A (en) 1985-02-05
RO84863B (ro) 1984-09-30
US4550763A (en) 1985-11-05
PL132008B1 (en) 1985-01-31
DD202253A5 (de) 1983-09-07
HU185073B (en) 1984-11-28
ATE19975T1 (de) 1986-06-15
YU282881A (en) 1984-08-31
BR8108037A (pt) 1982-09-21
AR230012A1 (es) 1984-02-29
RO84863A (ro) 1984-08-17
DK152178B (da) 1988-02-08
SU1287976A1 (ru) 1987-02-07
ES507780A0 (es) 1983-07-01
IN156285B (ro) 1985-06-15
DK152178C (da) 1988-06-27
JPH0238305B2 (ro) 1990-08-29
AU7845581A (en) 1982-06-17
DK550981A (da) 1982-06-12
DE3174743D1 (en) 1986-07-03

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