EP0525229B1 - Kolben, insbesondere zum Herausdrücken von flüssigem Metall aus einem Giesszylinder - Google Patents
Kolben, insbesondere zum Herausdrücken von flüssigem Metall aus einem Giesszylinder Download PDFInfo
- 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
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
- 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)
- Injection Moulding Of Plastics Or The Like (AREA)
- Sealing Devices (AREA)
- Details Of Reciprocating Pumps (AREA)
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 |
ES91112740T ES2095886T3 (es) | 1991-07-29 | 1991-07-29 | Embolo, particularmente para empujar metal liquido fuera de un cilindro de colada. |
EP91112740A EP0525229B1 (de) | 1991-07-29 | 1991-07-29 | Kolben, insbesondere zum Herausdrücken von flüssigem Metall aus einem Giesszylinder |
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 (de) | 1991-07-29 | 1991-07-29 | Kolben, insbesondere zum Herausdrücken von flüssigem Metall aus einem Giesszylinder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0525229A1 EP0525229A1 (de) | 1993-02-03 |
EP0525229B1 true EP0525229B1 (de) | 1996-11-06 |
Family
ID=8206992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91112740A Expired - Lifetime EP0525229B1 (de) | 1991-07-29 | 1991-07-29 | Kolben, insbesondere zum Herausdrücken von flüssigem Metall aus einem Giesszylinder |
Country Status (5)
Country | Link |
---|---|
US (1) | US5233912A (es) |
EP (1) | EP0525229B1 (es) |
JP (1) | JP3300045B2 (es) |
DE (1) | DE59108332D1 (es) |
ES (1) | ES2095886T3 (es) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
ATE364464T1 (de) * | 2002-03-04 | 2007-07-15 | 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 |
IT1393330B1 (it) | 2009-01-21 | 2012-04-20 | Brondolin S P A | Pistoni per pressofusione |
IT1393329B1 (it) * | 2009-01-21 | 2012-04-20 | Brondolin S P A | Pistone e anello di tenuta 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 |
PL2838680T3 (pl) * | 2012-04-20 | 2019-01-31 | Cpr Suisse S.A. | Tłok do zimnokomorowych maszyn do odlewania ciśnieniowego |
ES2449165B1 (es) * | 2014-02-21 | 2014-09-02 | Alrotec Tecnology S.L.U. | Pistón para máquinas de inyección de cámara fría |
EP3562607B1 (en) * | 2016-12-30 | 2021-04-07 | Exco Technologies Limited | Die-casting piston, and die-casting apparatus incorporating same |
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 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2862738A (en) * | 1954-10-27 | 1958-12-02 | Charles A D Bayley | Subaqueous structures for supporting a working platform above water |
US2844424A (en) * | 1956-02-20 | 1958-07-22 | Rand Goetze Corp | Piston sealing means |
US2844422A (en) * | 1956-12-05 | 1958-07-22 | Rand Goetze Corp | Piston ring |
DE1029615B (de) * | 1957-02-14 | 1958-05-08 | Krauss Maffei Ag | Kolbenring |
US2901258A (en) * | 1957-09-30 | 1959-08-25 | Brandafi Gabriel | Drill press spindle |
SE7510628L (sv) * | 1974-09-28 | 1976-03-29 | Hugo Kunz | Tryckkolv for en tryckgjutmaskin |
DE2446503A1 (de) * | 1974-09-28 | 1976-04-15 | Hugo Kunz | Druckkolben fuer eine druckgiessmaschine |
DE8304487U1 (de) * | 1983-02-18 | 1985-05-02 | Glas, Friedrich, 8192 Geretsried | Kolben für Druckgießmaschinen |
US4529330A (en) * | 1983-06-30 | 1985-07-16 | Otis Engineering Corporation | Cylinder connection |
DE3934778A1 (de) * | 1988-12-28 | 1990-07-05 | Allper Ag | Kolben, insbesondere fuer eine druckgusspresse |
US5094148A (en) * | 1989-05-08 | 1992-03-10 | Habley Medical Technology Corporation | Piston stem insert for a carpule based piston |
DE59010692D1 (de) * | 1989-10-18 | 1997-05-07 | Allper Ag | Kolben, insbesondere für eine Druckgusspresse |
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 |
-
1991
- 1991-07-29 EP EP91112740A patent/EP0525229B1/de not_active Expired - Lifetime
- 1991-07-29 ES ES91112740T patent/ES2095886T3/es not_active Expired - Lifetime
- 1991-07-29 DE DE59108332T patent/DE59108332D1/de not_active Expired - Fee Related
-
1992
- 1992-07-27 US US07/919,258 patent/US5233912A/en not_active Expired - Lifetime
- 1992-07-28 JP JP22189892A patent/JP3300045B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US5233912A (en) | 1993-08-10 |
DE59108332D1 (de) | 1996-12-12 |
JP3300045B2 (ja) | 2002-07-08 |
JPH0617931A (ja) | 1994-01-25 |
ES2095886T3 (es) | 1997-03-01 |
EP0525229A1 (de) | 1993-02-03 |
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