EP0037125B1 - Dispositif pour la coulée sous pression de métaux et d'alliages - Google Patents

Dispositif pour la coulée sous pression de métaux et d'alliages Download PDF

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Publication number
EP0037125B1
EP0037125B1 EP81102472A EP81102472A EP0037125B1 EP 0037125 B1 EP0037125 B1 EP 0037125B1 EP 81102472 A EP81102472 A EP 81102472A EP 81102472 A EP81102472 A EP 81102472A EP 0037125 B1 EP0037125 B1 EP 0037125B1
Authority
EP
European Patent Office
Prior art keywords
gas
press
chamber
die
cavity
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
EP81102472A
Other languages
German (de)
English (en)
Other versions
EP0037125A1 (fr
Inventor
Stantscho Christov Dipl.-Ing. Vutov
Raschko Rajkov Dipl.-Ing. Slavov
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 AT81102472T priority Critical patent/ATE4967T1/de
Publication of EP0037125A1 publication Critical patent/EP0037125A1/fr
Application granted granted Critical
Publication of EP0037125B1 publication Critical patent/EP0037125B1/fr
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
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
    • B22D27/13—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of gas pressure
    • 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
    • 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
    • B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging

Definitions

  • the invention relates to a device for the press casting of metals and alloys using an increased gas pressure above the solidifying melt, consisting of a hydraulic press with a press cylinder, a piston which divides the cylinder into two spaces which are connected to the hydraulic system of the press , and with a piston rod to which a press plate and a press mold are fastened, at least one gas collection cavity being formed in the press mold and connected to a gas container by shut-off elements.
  • the press mold is connected to a press piston by means of a pneumatic piston which is arranged in a pneumatic cylinder, the compression space in front of the pneumatic piston being connected to the press mold cavities, to which compressed gas is supplied by gas lines and at least one adjustable check valve is supplied, which opens in the direction from the compression space in front of the pneumatic piston to the mold cavities (Bulg. Pat. No. 21 077).
  • This device has the disadvantage that the usable stroke is shortened due to the installation of an additional element, namely a pneumatic cylinder with piston between the plunger and the die, that the die is unsafe during operation due to its movable connection with the plunger and that the mold must first be closed before the gas can be compressed.
  • an additional element namely a pneumatic cylinder with piston between the plunger and the die
  • Another known device for press casting using an increased gas pressure has a specialized hydraulic press with separate devices for closing the press mold and for pressing.
  • the device is provided with an independent hydro-pneumatic multiplier, which is arranged in the press piston and is connected to a gas container and to the press mold cavity by means of corresponding shut-off elements. After the mold has been closed, the multiplier is operated at a special command to increase the pressure of the gas in the mold cavity to the required value.
  • This device has the disadvantage that it has a very complicated construction and does not allow the use of a high gas pressure immediately after the mold has been closed.
  • the invention has for its object to design the device of the type mentioned so that the compression of the gas take place automatically during the idle stroke (free stroke of the piston during its working stroke) of the press and a high gas pressure on the solidifying melt immediately after closing the Press mold can be exercised.
  • a chamber is formed in the piston rod which is filled to a certain level with operating fluid from the hydraulic system of the press.
  • the lower part of this chamber is connected to the space of the press cylinder below the piston. This space is in turn connected to the hydraulic system of the press via a shut-off element.
  • the upper part of the chamber is simultaneously connected to the gas container via a check valve and to the mold cavity via a shut-off valve.
  • the mold cavity is in turn connected to the atmosphere via another shut-off valve.
  • the device according to the invention has the advantage that the development of systems for compressing the gas in each mold is eliminated and a maximum gas pressure can be exerted immediately after the mold is closed.
  • a movable partition can advantageously be arranged in the chamber between the operating liquid and the gas.
  • the device consists of a press cylinder 1 with a press piston 2 arranged therein, which has a piston rod 3.
  • a press plate 14 and a press mold 15 are fastened to the piston rod 3.
  • the piston 2 and the cylinder 1 are sealed from one another by means of ring-shaped sealing elements 6.
  • the piston rod 3 and the cylinder 1 are sealed by sealing elements 12.
  • the space 4 above the piston 2 is connected to the hydraulic system of the press by means of a pipeline 5.
  • the space 8 of the press cylinder 1 below the piston 2 is connected to the hydraulic system of the press via a shut-off element 10.
  • a chamber 9 is formed in the piston rod 3, which is filled up to a certain level with operating fluid 13 from the hydraulic system of the press. The rest of the chamber 9 is filled with gas 24.
  • the lower part of the chamber 9 is connected via a pipe 11 and a channel 7 to the space 8 below the piston 2.
  • the upper part of the chamber 9 is connected via a pipe 23 at the same time via a check valve 21 to the gas container 22, via a shut-off valve 18 to the cavity 16 of the mold 15 and via an adjustable check valve 19 to the atmosphere.
  • the cavity 16 of the mold 15 is in turn connected to the atmosphere via a shut-off valve 17.
  • the chamber 9 is connected to a manometer 20 for checking the gas pressure.
  • the valve 18 is closed.
  • the valve 17 for releasing the gas remaining in the die into the atmosphere is opened.
  • a command is given for the plunger reverse stroke, i.e. the pressure in room 4 is reduced by connecting pipeline 5 to the press container.
  • the piston, together with the die 15 moves upwards under the action of the pressure of the gas in the chamber 9, the operating liquid 13 running back into the space 8 below the piston.
  • the piston 2 moves further downward, with an additional quantity of gas flowing from the gas container 22 through the check valve 21 into the chamber 9, as a result of which the device returns to the starting position.
  • the device according to the invention operates as a normal hydraulic press.
  • a movable partition 25 is arranged in the chamber 9 between the operating liquid 13 and the gas 24, which is designed as a floating piston, which is sealed to the wall of the chamber 9 by means of annular sealing elements 26. In this way, direct contact between gas and operating fluid is avoided and the risk of possible interaction is eliminated.
  • the movable partition is designed as an elastic membrane 27 which is fixedly attached to the chamber 9.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Steroid Compounds (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Lead Frames For Integrated Circuits (AREA)

Claims (2)

1. Dispositif pour mouler sous pression des métaux et des alliages en utilisant une pression de gaz élevée au-dessus de la masse fondue en train de se solidifier, qui comprend une presse hydraulique comportant un cylindre de presse (1), un piston (2), qui divise le cylindre en deux espaces, qui sont reliés au système hydraulique de la presse, et une tige de piston (3) à laquelle sont fixés un plateau compresseur (14) et une matrice de presse (15), cette matrice (15) présentant au moins un espace (16) pour l'accumulation de gaz, relié, par l'intermédiaire d'éléments d'arrêt (18) à un réservoir de gaz (22), caractérisé en ce que dans la tige de piston (3) est formée une chambre (9) qui est remplie jusqu'à un niveau déterminé avec un fluide de travail (13), tandis que la partie inférieure de la chambre est reliée à l'espace (8) situé sous le piston de pression, cet espace étant relié par un élément d'arrêt (10) au système hydraulique de la presse, tandis que la partie supérieure de la chambre (9) est reliée en même temps par un clapet de non retour (21) au réservoir de gaz (22) et par une soupape d'arrêt (18) à la cavité (16) de la matrice de presse (15), cependant que la cavité (16) est reliée à l'atmosphère par une soupape d'arrêt (17).
2. Dispositif selon la revendication 1, caractérisé en ce que dans la chambre (9) et entre le fluide de travail (13) et le gaz (24) est interposée une cloison mobile (25).
EP81102472A 1980-04-02 1981-04-01 Dispositif pour la coulée sous pression de métaux et d'alliages Expired EP0037125B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81102472T ATE4967T1 (de) 1980-04-02 1981-04-01 Vorrichtung zum pressgiessen von metallen und legierungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BG47207/80 1980-04-02
BG8047207A BG31832A1 (en) 1980-04-02 1980-04-02 Method for liquid or semi- liquid stamping

Publications (2)

Publication Number Publication Date
EP0037125A1 EP0037125A1 (fr) 1981-10-07
EP0037125B1 true EP0037125B1 (fr) 1983-10-12

Family

ID=3907300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102472A Expired EP0037125B1 (fr) 1980-04-02 1981-04-01 Dispositif pour la coulée sous pression de métaux et d'alliages

Country Status (10)

Country Link
US (1) US4393916A (fr)
EP (1) EP0037125B1 (fr)
JP (1) JPS5717365A (fr)
AT (1) ATE4967T1 (fr)
BG (1) BG31832A1 (fr)
CS (1) CS231982B2 (fr)
DD (1) DD160894A5 (fr)
DE (1) DE3161158D1 (fr)
IN (1) IN154994B (fr)
SU (1) SU1150054A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535231B1 (fr) * 1982-10-27 1987-01-23 Inst Po Metalloznanie I Tekno Procede pneumatique a piston pour la coulee de metaux et d'autres materiaux, et equipement pour sa realisation
JPS607211A (ja) * 1983-06-24 1985-01-16 Nec Corp 差動増幅回路
JPS60160209A (ja) * 1984-01-31 1985-08-21 Fujitsu Ltd Ｆｅｔ差動増幅回路
CN104942261A (zh) * 2014-03-25 2015-09-30 苏州慧驰轻合金精密成型科技有限公司 一种新型活塞挤压铸造机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2010181B2 (de) * 1969-03-04 1971-06-09 Pressmechanismus bei druckgiessmaschinen mit hydraulischem antrieb
DE1583631B2 (de) * 1967-11-10 1975-03-20 Badische Maschinenfabrik Gmbh, 7500 Karlsruhe EinpreBvorrichtung für hydraulisch betriebene Druckgießmaschinen
DE2355594A1 (de) * 1973-11-07 1975-05-15 Valentin Emmerich Vorrichtung zum einstellen der beim druckgiessen erforderlichen presskolbengeschwindigkeiten, -druecke und druckaufbauzeiten
DE2450805B2 (de) * 1973-10-29 1976-12-30 Societe de Vente de T Aluminium Pechiney, Paris Druckgiessverfahren fuer ne-metalle und ne-legierungen und vorrichtung zu seiner durchfuehrung
DE2747066B1 (de) * 1977-10-20 1979-03-15 Weingarten Ag Maschf Vorrichtung zum Einstellen der Presskolbengeschwindigkeiten und -druecke bei Druckgiessmaschinen mit Drei-Phasen-System,insbesondere bei Kaltkammer-Druckgiessmaschinen
DE2854075B1 (de) * 1978-12-14 1980-01-17 Weingarten Ag Maschf Druckgiessmaschine mit einem in einem Presszylinder verschiebbaren Presskolben und einem Druckmultiplikator zur Erzeugung eines erhoehten Druckes im Presszylinder-Arbeitsraum gegen Ende des Arbeitshubes des-Presskolbens

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH607755A5 (fr) * 1974-08-30 1978-10-31 Inst Po Metalloznanie I Tekno
US3960201A (en) * 1974-12-13 1976-06-01 Societe De Vente De L'aluminium Pechiney Injection device for molding machines
JPS5852743B2 (ja) * 1976-02-04 1983-11-25 トヨタ自動車株式会社 溶湯鍛造型装置
US4154288A (en) * 1977-11-02 1979-05-15 Arrow-Acme Corporation Injection molding machine having swivel shot tip assembly
CH635255A5 (de) * 1978-07-19 1983-03-31 Buehler Ag Geb Druckgiessmaschine.
US4334575A (en) * 1980-03-18 1982-06-15 Nippon Light Metal Co., Ltd. Method for cooling a plunger tip in a die casting machine of the cold chamber type and apparatus therefor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1583631B2 (de) * 1967-11-10 1975-03-20 Badische Maschinenfabrik Gmbh, 7500 Karlsruhe EinpreBvorrichtung für hydraulisch betriebene Druckgießmaschinen
DE2010181B2 (de) * 1969-03-04 1971-06-09 Pressmechanismus bei druckgiessmaschinen mit hydraulischem antrieb
DE2450805B2 (de) * 1973-10-29 1976-12-30 Societe de Vente de T Aluminium Pechiney, Paris Druckgiessverfahren fuer ne-metalle und ne-legierungen und vorrichtung zu seiner durchfuehrung
DE2355594A1 (de) * 1973-11-07 1975-05-15 Valentin Emmerich Vorrichtung zum einstellen der beim druckgiessen erforderlichen presskolbengeschwindigkeiten, -druecke und druckaufbauzeiten
DE2747066B1 (de) * 1977-10-20 1979-03-15 Weingarten Ag Maschf Vorrichtung zum Einstellen der Presskolbengeschwindigkeiten und -druecke bei Druckgiessmaschinen mit Drei-Phasen-System,insbesondere bei Kaltkammer-Druckgiessmaschinen
DE2854075B1 (de) * 1978-12-14 1980-01-17 Weingarten Ag Maschf Druckgiessmaschine mit einem in einem Presszylinder verschiebbaren Presskolben und einem Druckmultiplikator zur Erzeugung eines erhoehten Druckes im Presszylinder-Arbeitsraum gegen Ende des Arbeitshubes des-Presskolbens

Also Published As

Publication number Publication date
ATE4967T1 (de) 1983-10-15
BG31832A1 (en) 1982-04-15
JPS5717365A (en) 1982-01-29
SU1150054A1 (ru) 1985-04-15
DE3161158D1 (en) 1983-11-17
CS239581A2 (en) 1984-01-16
DD160894A5 (de) 1984-06-13
EP0037125A1 (fr) 1981-10-07
IN154994B (fr) 1984-12-22
US4393916A (en) 1983-07-19
CS231982B2 (en) 1985-01-16

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