EP0037125A1 - 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

Info

Publication number
EP0037125A1
EP0037125A1 EP81102472A EP81102472A EP0037125A1 EP 0037125 A1 EP0037125 A1 EP 0037125A1 EP 81102472 A EP81102472 A EP 81102472A EP 81102472 A EP81102472 A EP 81102472A EP 0037125 A1 EP0037125 A1 EP 0037125A1
Authority
EP
European Patent Office
Prior art keywords
press
gas
chamber
cavity
die
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.)
Granted
Application number
EP81102472A
Other languages
German (de)
English (en)
Other versions
EP0037125B1 (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
Institute po Metaloznanie i Technologia na Metalite
Original Assignee
INSTITUT PO METALOSNANIE I TECHNOLOGIA NA METALITE
Institute po Metaloznanie 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, Institute po Metaloznanie 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

Links

Images

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, wherein at least one gas collection cavity is formed in the press mold and is 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.
  • Vorrich- un t g is provided with an independent hydro-pneumatic multi p l ikator, which is arranged in the plunger and by means of respective shut-off elements h older with a Gasbe- and is connected to the die cavity.
  • the multiplier is operated on 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 very compli - is built ert zi and does not permit the application of a high gas pressure immediately after closing the mold.
  • 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 empty stroke of the press and a high gas pressure can be exerted on the solidifying melt immediately after closing the mold.
  • 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 with the space of the press cylinder connected 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 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. On the piston rod 3, a press plate 14 and a die 15 are attached. 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, which to a certain level st._ with operating liquid 13 from the hydraulic system of the press is filled i
  • the rest of the chamber 9 is filled with gas 24th
  • 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 die 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.
  • valve 18 After solidification of the pressed part in the mold the valve 18 closed.
  • the valve 17 for releasing the gas remaining in the die into the atmosphere is opened.
  • a command is given for the backward stroke of the plunger, ie the pressure in chamber 4 is reduced by connecting pipe 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 After the pressure in the chamber 9 and in the gas container 22 has been equalized, the piston 2 moves further downward, 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

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Lead Frames For Integrated Circuits (AREA)
  • Steroid Compounds (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
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 true EP0037125A1 (fr) 1981-10-07
EP0037125B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535231A1 (fr) * 1982-10-27 1984-05-04 Inst Po Metalloznanie I Tekno Procede pneumatique a piston pour la coulee de metaux et d'autres materiaux, et equipement pour sa realisation
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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535231A1 (fr) * 1982-10-27 1984-05-04 Inst Po Metalloznanie I Tekno Procede pneumatique a piston pour la coulee de metaux et d'autres materiaux, et equipement pour sa realisation
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

Also Published As

Publication number Publication date
DE3161158D1 (en) 1983-11-17
CS231982B2 (en) 1985-01-16
CS239581A2 (en) 1984-01-16
BG31832A1 (en) 1982-04-15
ATE4967T1 (de) 1983-10-15
US4393916A (en) 1983-07-19
SU1150054A1 (ru) 1985-04-15
JPS5717365A (en) 1982-01-29
DD160894A5 (de) 1984-06-13
IN154994B (fr) 1984-12-22
EP0037125B1 (fr) 1983-10-12

Similar Documents

Publication Publication Date Title
DE2818337C2 (de) Druckübersetzter hydropneumatischer
DE2851070B2 (de) Vorrichtung zum Entlasten des Dichtungspaketes einer Kolbenstange eines hydraulischen Teleskopstoßdämpfers
DE3241881A1 (de) Tandemhauptzylinder fuer hydraulisch betaetigte kraftfahrzeugbremsen
DE2107478A1 (de) Bremsventil für eine hydraulische Bremsanlage
DE2146502C3 (de) Ventilanordnung zum Setzen hydraulischer Grubenstempel mit hoher Setzkraft
DE2505648C3 (de) Steuervorrichtung für eine Druckgießmaschine
EP0037125B1 (fr) Dispositif pour la coulée sous pression de métaux et d'alliages
DE2544794B2 (de) Antrieb einer hydraulischen Presse
DE2212131C2 (de) Hydraulische Einrichtung zum selbsttätigen Regeln der Scheinwerferneigung bei Kraftfahrzeugen
CH415111A (de) Hydraulische Rohrprüfpresse
DE3123498C1 (de) Vorrichtung zum beschleunigten Aufbau und zur Regulierung des Nachdruckes an Druckgiessmaschinen
EP0203322B1 (fr) Dispositif pour compacter un matériau de moulage de fonderie à l'aide d'un gaz de compression
DE3240242C2 (fr)
EP0152573B1 (fr) Dispositif pour compacter du matériau de moulage de fonderie à l'aide d'un gaz de compression
EP0186002A1 (fr) Dispositif pour empêcher des pointes de pression dans un appareil de pression d'une machine à couler sous pression
DE19853711C5 (de) Hydropneumatischer Druckübersetzer
EP0068147A1 (fr) Dispositif pour l'admission de pression au cylindre à presser dans une machine à coulée sous pression
DE1583631C3 (de) Einpreßvorrichtung für hydraulisch betriebene Druckgießmaschinen
DE2522800A1 (de) Verfahren und vorrichtung zur begrenzung des nachdruckes im anschluss an die formfuellphase beim druckgiessen von metallen
DE81188C (fr)
CH661883A5 (en) Submerged-plunger (hot-chamber piston) die-casting method and a machine for carrying out the method
DE1605264C3 (de) Druckluftbremsanlage für Schienenfahrzeuge mit einem Druckübersetzer, einem Gleitschutzregler und einem fahrgeschwindigkeitsabhängigen Regler
DE909795C (de) Steuerung fuer Arbeitskolben von hydraulischen Pressen
DE2048281C3 (de) Vorrichtung zum Verdichten von pulverförmigem Material
DE1920181A1 (de) Hydraulische Stoesselvorrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR GB IT SE

17P Request for examination filed

Effective date: 19811006

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT CH DE FR GB IT LI SE

REF Corresponds to:

Ref document number: 4967

Country of ref document: AT

Date of ref document: 19831015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3161158

Country of ref document: DE

Date of ref document: 19831117

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19840224

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19840331

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19840424

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19840628

Year of fee payment: 4

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19860217

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19880401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19880430

Ref country code: CH

Effective date: 19880430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881118

GBPC Gb: european patent ceased through non-payment of renewal fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19890103

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19890402

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19891228

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 81102472.8

Effective date: 19900412