EP0525229B1 - Piston, notamment pour pousser du métal liquide hors d'un cylindre de coulée - Google Patents

Piston, notamment pour pousser du métal liquide hors d'un cylindre de coulée Download PDF

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Publication number
EP0525229B1
EP0525229B1 EP91112740A EP91112740A EP0525229B1 EP 0525229 B1 EP0525229 B1 EP 0525229B1 EP 91112740 A EP91112740 A EP 91112740A EP 91112740 A EP91112740 A EP 91112740A EP 0525229 B1 EP0525229 B1 EP 0525229B1
Authority
EP
European Patent Office
Prior art keywords
cap
carrier
sealing ring
piston
piston according
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
EP91112740A
Other languages
German (de)
English (en)
Other versions
EP0525229A1 (fr
Inventor
Andre Müller
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.)
Allper AG
Original Assignee
Allper AG
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 Allper AG filed Critical Allper AG
Priority to DE59108332T priority Critical patent/DE59108332D1/de
Priority to EP91112740A priority patent/EP0525229B1/fr
Priority to ES91112740T priority patent/ES2095886T3/es
Priority to US07/919,258 priority patent/US5233912A/en
Priority to JP22189892A priority patent/JP3300045B2/ja
Publication of EP0525229A1 publication Critical patent/EP0525229A1/fr
Application granted granted Critical
Publication of EP0525229B1 publication Critical patent/EP0525229B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/203—Injection pistons
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7005—Lugged member, rotary engagement
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7005—Lugged member, rotary engagement
    • Y10T403/7007—Bayonet joint

Definitions

  • the invention relates to a piston of a die casting press for pressing liquid metal - preferably liquid aluminum or liquid brass - out of a casting cylinder, with a cap to be placed on a carrier and to be fastened to the carrier in this way, the cap having an inner cover surface of an end face of the carrier faces.
  • Such a piston is known from EP-A2-423 413.
  • the cap with an internal thread is to be thermally screwed onto an external thread of the carrier.
  • the object of the invention is to facilitate the fitting and fastening of the cap to the carrier in order to enable the cap to be replaced quickly, so that the corresponding downtimes of the machine in which the piston works are reduced.
  • the piston is characterized in that there are recesses in the inner circumferential surface of the cap in the vicinity of its free edge surface for receiving bayonet locking projections on the circumference of the carrier.
  • the piston is preferably characterized in that there are four equally spaced bayonet-lock projections on the carrier, which four insertion recesses in the cap are assigned.
  • the piston is preferably characterized in that the axial dimensions of the Recesses receiving bayonet catch protrusions, allowing an axial movement play between the inner cover surface of the cap and the end face of the wearer, are somewhat larger - preferably 0.1 to 0.2 mm larger - than the axial dimensions of the bayonet catch protrusions.
  • the piston is preferably characterized in that, in order to fix the cap to the carrier, the cap has at least one round recess in its free edge for receiving a head part of a screw to be screwed into the carrier .
  • the cap is preferably provided with a sealing ring in the front area of its circumference, as is known in principle from EP-A2-423 413. It has proven particularly useful in cooperation with the cap according to the invention that the sealing ring not only encompasses an outer circumferential web on the cap with an inner circumferential groove, but also that the sealing ring has a cylindrical inner circumferential surface in front of the circumferential groove, which has two axially successive, cylindrical outer circumferential surface sections of the Encloses the cap at a distance, wherein the front cylindrical outer peripheral surface has a larger diameter than the rear cylindrical outer peripheral surface.
  • the rear cylindrical outer peripheral surface is designed as a retention puncture for solidified liquid metal. Metal that solidifies in the retaining groove spreads the sealing ring apart and thus increases its sealing effect.
  • the sealing ring is held on the cap by the circumferential web.
  • the front boundary surface of the peripheral web forms a stop surface for the sealing ring, so it absorbs an axial pressure on the sealing ring and delimits a sealing zone to the sealing ring.
  • the cap preferably has a ring surface pointing forward at a short distance from a rear end face of the sealing ring.
  • the cap In order to also use liquid metal that is penetrating axially over the outer circumferential surface of the sealing ring, the cap preferably has a section of reduced outer diameter behind the sealing ring that forms a storage zone. If metal enters this storage zone, the user recognizes that the sealing ring no longer has to be completely sealed and replaced.
  • Fig. 1 shows an axial section, partly in side view, of a cap located on a carrier, the carrier being pushed forward relative to the cap.
  • Fig. 2 shows corresponding to Fig. 1 the case that the carrier is pulled back relative to the cap.
  • Fig. 3 shows a section along III-III in Fig. 1 with the cap not yet locked.
  • Fig. 4 shows corresponding to Fig. 3, the locked cap.
  • Fig. 5 shows an exploded view of the cap and carrier.
  • the piston according to the exemplary embodiment has an end to be secured to a carrier 2 and serves as the actual piston Cap 4 on.
  • the cap 4 faces an end face 8 of the carrier 2 with an inner cover surface 6.
  • In the inner circumferential surface 10 of the cap 4 there are four depressions 14 in the vicinity of their free edge surface 12, which have the same angular spacing from one another, for receiving four bayonet catches 16 on the circumference 18 of the carrier 2, respectively.
  • the axial dimensions of the bayonet catch projections 16 Recesses 14 - allowing an axial play of movement between the inner cover surface 6 of the cap 4 and the end face 8 of the carrier 2, as can be seen in FIGS. 1 and 2, permitting temperature expansion of the cap 4 - are somewhat larger than the axial dimensions of the bayonet lock projections 16.
  • the cap 4 has in its free edge surface 12 a round recess 20 for receiving a head part 22 of a screw 24 to be screwed into the carrier 2.
  • the carrier 2 is provided with an internal thread 26 for screwing onto an external thread of a piston rod, not shown.
  • an internal thread 26 for screwing onto an external thread of a piston rod, not shown.
  • attachment surfaces 28 for a U key on the outside of the carrier are provided.
  • the piston rod and the carrier 2 are axially penetrated by a tube 30 which ends in a bore 32 in front of the end face 8 of the carrier 2.
  • a coolant can be pressed through the tube 30 into a radial cannula 34 in the end face 8 of the carrier, which coolant can then be drawn through axial recesses 36 in a front annular support surface 38 of the carrier via an annular channel 40 and obliquely extending bores 42 in a carrier 2 formed in the carrier 2. the tube surrounding the annular space 44 and from there flows back through the carrier 2. Details of this type of cooling are described in EP-A2-423 413.
  • a sealing ring 46 is schematically shown, which encloses the front end of the cap 4.
  • cap and sealing ring which can also be used independently of the cap 4 which can be plugged onto the carrier 2 by means of a bayonet lock and which is explained in connection with FIGS. 1 to 5, is shown in FIG. 6.
  • Another preferred embodiment has a cap which has a cylindrical projection with an outer ring web on an outer cover surface. This ring web engages in an inner ring groove of a sealing ring.
  • the cylindrical extension is provided with an annular recess, which serves to receive an inner annular web of the sealing ring.
  • the sealing ring and the shoulder have at the front first parallel, then diverging to the front, opposing boundary surfaces.
  • a ring shoulder of the outer cover surface of the cap which is radially delimited by the extension, is opposite a rear boundary surface of the sealing ring at a short distance.
  • the rear boundary surface of the sealing ring merges into the outer peripheral surface of the sealing ring via a run-up slope.
  • the sealing ring In front of the annular groove, the sealing ring has a cylindrical inner circumferential surface which forms a section of the boundary surface and encloses two axially successive cylindrical outer circumferential sections of the cap at a distance, the front cylindrical outer circumferential section having a larger diameter than the rear cylindrical outer circumferential section.
  • the outer peripheral portion thus limits the Retention puncture described at the beginning.
  • the cap has a section of reduced outer diameter which forms the storage zone described at the outset.
  • the liquid metal flows into the spaces between the sealing ring and the cap and in the axial direction over the outer peripheral surface of the sealing ring.
  • the piston is to be moved within an inner circumferential surface of a casting cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Sealing Devices (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Details Of Reciprocating Pumps (AREA)

Claims (7)

  1. Piston d'une presse de moulage sous pression pour expulser d'un cylindre de coulée du métal liquide, de préférence de l'aluminium liquide ou du laiton liquide, avec un capot (4) à poser sur un élément porteur (2) et à fixer à l'élément porteur (2), le capot (4) faisant face à une face frontale (8) de l'élément porteur (2) par une face de recouvrement intérieure (6),
    caractérisé en ce que des renfoncements (14) pour recevoir des saillies (16) de fermeture à baïonnette prévues sur la périphérie (18) de l'élément porteur (2) se trouvent dans la face périphérique intérieure (10) du capot (4) au voisinage de sa face de bord libre (12).
  2. Piston selon la revendication 1, caractérisé en ce que quatre saillies (16) de fermeture à baïonnette se trouvent à des distances angulaires identiques les unes des autres sur l'élément porteur (2), saillies auxquelles sont associés quatre évidements d'enclenchement (15) dans le capot (4).
  3. Piston selon la revendication 1 ou 2, caractérisé en ce que les dimensions axiales des renfoncements (14) recevant les saillies (16) de fermeture à baïonnette, autorisant un jeu de mouvement axial entre la face de recouvrement intérieure (6) du capot (4) et la face frontale (8) de l'élément porteur (2), sont légèrement supérieures, de préférence supérieures de 0,1 à 0,2 mm, aux dimensions axiales des saillies (16) de fermeture à baïonnette.
  4. Piston selon l'une quelconque des revendications précédentes, caractérisé en ce qu'afin de fixer en position le capot (4) sur l'élément porteur (2), le capot (4) présente, dans sa face de bord libre (12), au moins un évidement rond (20) pour recevoir une partie de tête (22) d'une vis (24) à visser dans l'élément porteur (2).
  5. Piston dans lequel le capot est pourvu, dans une partie périphérique avant, d'une bague d'étanchéité qui s'engage par une rainure annulaire intérieure autour d'une nervure annulaire extérieure prévue sur le capot, selon l'une quelconque des revendications précédentes, caractérisé en ce que la bague d'étanchéité présente, en avant de la rainure annulaire, une face périphérique intérieure cylindrique qui entoure à distance deux parties périphériques extérieures cylindriques du capot qui se succèdent axialement, la partie périphérique extérieure cylindrique avant possédant un plus grand diamètre que la partie périphérique extérieure cylindrique arrière.
  6. Piston selon la revendication 5, caractérisé en ce que le capot présente, à faible distance d'une face de délimitation arrière de la bague d'étanchéité, un épaulement annulaire dirigé vers l'avant.
  7. Piston selon la revendication 5 ou 6, caractérisé en ce que le capot présente, en arrière de la bague d'étanchéité, une partie de diamètre extérieur réduit qui forme une zone d'accumulation.
EP91112740A 1991-07-29 1991-07-29 Piston, notamment pour pousser du métal liquide hors d'un cylindre de coulée Expired - Lifetime EP0525229B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE59108332T DE59108332D1 (de) 1991-07-29 1991-07-29 Kolben, insbesondere zum Herausdrücken von flüssigem Metall aus einem Giesszylinder
EP91112740A EP0525229B1 (fr) 1991-07-29 1991-07-29 Piston, notamment pour pousser du métal liquide hors d'un cylindre de coulée
ES91112740T ES2095886T3 (es) 1991-07-29 1991-07-29 Embolo, particularmente para empujar metal liquido fuera de un cilindro de colada.
US07/919,258 US5233912A (en) 1991-07-29 1992-07-27 Piston for forcing liquid metal out of a casting cylinder
JP22189892A JP3300045B2 (ja) 1991-07-29 1992-07-28 ピストン及びピストン用シールリング

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91112740A EP0525229B1 (fr) 1991-07-29 1991-07-29 Piston, notamment pour pousser du métal liquide hors d'un cylindre de coulée

Publications (2)

Publication Number Publication Date
EP0525229A1 EP0525229A1 (fr) 1993-02-03
EP0525229B1 true EP0525229B1 (fr) 1996-11-06

Family

ID=8206992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112740A Expired - Lifetime EP0525229B1 (fr) 1991-07-29 1991-07-29 Piston, notamment pour pousser du métal liquide hors d'un cylindre de coulée

Country Status (5)

Country Link
US (1) US5233912A (fr)
EP (1) EP0525229B1 (fr)
JP (1) JP3300045B2 (fr)
DE (1) DE59108332D1 (fr)
ES (1) ES2095886T3 (fr)

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DE4230080C2 (de) * 1992-09-09 1998-04-09 Hugo Kunz Druckgießkolben, insbesondere für Kaltkammer-Druckgießmaschinen
US5411350A (en) * 1993-11-03 1995-05-02 Loctite Corporation Quick connect/disconnect device, and dispensing apparatus comprising same
JP3019713B2 (ja) * 1994-02-21 2000-03-13 豊田合成株式会社 操作ノブの組付け構造
US5653322A (en) * 1996-01-30 1997-08-05 Borg-Warner Automotive, Inc. Two piece clutch assembly having twist lock joint
US5607251A (en) * 1996-04-03 1997-03-04 The Stanley Works Quick coupler assembly for hanging attachment
US5687604A (en) * 1996-05-30 1997-11-18 Exco Technologies Ltd. Thermal controlled mandrel with replaceable tip for copper and brass extrusion
US5680894A (en) * 1996-10-23 1997-10-28 Lindberg Corporation Apparatus for the injection molding of a metal alloy: sub-ring concept
US5913605A (en) * 1997-09-17 1999-06-22 G. H. Hensley Industries, Inc. Rotary lock system for wear runner assembly
DE19923341B4 (de) * 1999-05-21 2005-03-03 Audi Ag Verfahren zum Betreiben einer Druckgießmaschine sowie Druckgießmaschine zur Durchführung des Verfahrens
DE10037887A1 (de) * 2000-08-03 2002-02-14 Mahle Gmbh Kolben-Zylinder-Baueinheit für einen Verbrennungsmotor mit einem schaftlosen Kolben
US6598450B2 (en) 2001-11-02 2003-07-29 Sequa Can Machinery, Inc. Internally cooled punch
DE50210331D1 (de) * 2002-03-04 2007-07-26 Allper Ag Dichtring und kolben für einen druckgiesszylinder
DE20309181U1 (de) * 2003-06-13 2004-10-28 Allper Ag Mehrteiliger Kolben für eine Kaltkammer-Druckgießmaschine
US8550743B2 (en) * 2005-09-30 2013-10-08 Medtronic, Inc. Sliding lock device
DE102005048717A1 (de) * 2005-10-12 2007-04-19 Allper Ag Mehrteiliger Kolben für eine Kaltkammer-Giessmaschine
ITBS20060087A1 (it) * 2006-04-12 2007-10-13 Copromec S R L Pistone per macchine per la pressofusione a camera fredda
US8048069B2 (en) 2006-09-29 2011-11-01 Medtronic, Inc. User interface for ablation therapy
US20080286398A1 (en) * 2007-05-15 2008-11-20 Jui-Hsiang Wang Fast-to-install structure for a threaded rod of an injection molding machine
IT1393329B1 (it) 2009-01-21 2012-04-20 Brondolin S P A Pistone e anello di tenuta per pressofusione
IT1393330B1 (it) 2009-01-21 2012-04-20 Brondolin S P A Pistoni per pressofusione
DE102009056903A1 (de) * 2009-12-03 2011-06-09 Danfoss A/S Hydraulische Kolbenmaschine, insbesondere wasserhydraulische Maschine
DE202010008596U1 (de) 2010-09-21 2010-12-02 Schmelzmetall (Deutschland) Gmbh Druckgusskolben
FR2974023A1 (fr) * 2011-04-14 2012-10-19 Sidel Participations Dispositif d'assemblage d'un outillage sur un support
DE102011052446A1 (de) 2011-08-05 2013-02-07 Schmelzmetall Ag Druckgusskolbenkopf
MX350918B (es) * 2012-04-20 2017-09-25 Cpr Suisse S A Pistón para máquinas de fundición a presión de cámara fría.
ES2449165B1 (es) * 2014-02-21 2014-09-02 Alrotec Tecnology S.L.U. Pistón para máquinas de inyección de cámara fría
EP3562607B1 (fr) * 2016-12-30 2021-04-07 Exco Technologies Limited Piston de coulée sous pression, et appareil de coulée sous pression incorporant ce dernier
US10807286B2 (en) * 2017-04-06 2020-10-20 Mold-Masters (2007) Limited Liquid injection molding apparatus
DE102017003693B3 (de) * 2017-04-15 2018-06-14 Wieland-Werke Ag Druckgießkolben
US10987731B1 (en) * 2020-07-30 2021-04-27 Exco Technologies Limited Die-casting piston, and die-casting apparatus incorporating same

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DE2446503A1 (de) * 1974-09-28 1976-04-15 Hugo Kunz Druckkolben fuer eine druckgiessmaschine
SE7510628L (sv) * 1974-09-28 1976-03-29 Hugo Kunz Tryckkolv for en tryckgjutmaskin
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US5094148A (en) * 1989-05-08 1992-03-10 Habley Medical Technology Corporation Piston stem insert for a carpule based piston
EP0423413B1 (fr) * 1989-10-18 1997-04-02 Allper Ag Piston, notamment pour un appareil de coulée sous pression
DE9014003U1 (de) * 1990-10-08 1990-12-13 Alfred Kunz GmbH & Co, 8000 München Kontaktaufnahmeprofil, insbesondere für geschirmte Türen mit Türrahmen für abgeschirmte Räume
DE9014033U1 (de) * 1990-10-09 1990-12-13 D. Schade GmbH, 2356 Aukrug Kolben für Druckgießmaschinen

Also Published As

Publication number Publication date
JPH0617931A (ja) 1994-01-25
ES2095886T3 (es) 1997-03-01
JP3300045B2 (ja) 2002-07-08
DE59108332D1 (de) 1996-12-12
US5233912A (en) 1993-08-10
EP0525229A1 (fr) 1993-02-03

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