EP0901852A1 - Piston pour une machine à couler sous pression à chambre chaude - Google Patents

Piston pour une machine à couler sous pression à chambre chaude Download PDF

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Publication number
EP0901852A1
EP0901852A1 EP97810643A EP97810643A EP0901852A1 EP 0901852 A1 EP0901852 A1 EP 0901852A1 EP 97810643 A EP97810643 A EP 97810643A EP 97810643 A EP97810643 A EP 97810643A EP 0901852 A1 EP0901852 A1 EP 0901852A1
Authority
EP
European Patent Office
Prior art keywords
piston
sealing ring
slot
casting cylinder
web
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
EP97810643A
Other languages
German (de)
English (en)
Other versions
EP0901852B1 (fr
Inventor
André 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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to ES97810643T priority Critical patent/ES2178746T3/es
Priority to EP19970810643 priority patent/EP0901852B1/fr
Priority to DE59707737T priority patent/DE59707737D1/de
Publication of EP0901852A1 publication Critical patent/EP0901852A1/fr
Application granted granted Critical
Publication of EP0901852B1 publication Critical patent/EP0901852B1/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

Definitions

  • the present invention relates to a piston for a casting cylinder of a hot chamber die casting machine and further relates to a sealing ring for such a piston.
  • At least two ring segments are loosely arranged in the ring groove, which are during the working stroke of the piston through the liquid metal flowing through the channels to the inner jacket of the casting cylinder are pressed and thus act as a sealing ring.
  • liquid metal is also between the piston and The casting cylinder can penetrate towards the piston rod and solidify with
  • the possible destruction of pistons and casting cylinders is also the manufacture of the Pistons extremely complicated and expensive.
  • a sealing ring is in EP-PS 423 413 for the cap of a carrier body for use in a cold chamber die casting press disclosed, but which are not used in a hot chamber die casting machine can.
  • the invention is therefore based on the object of avoiding the disadvantages described and a piston for a casting cylinder of a hot chamber die casting machine create that ensures a secure seal with simple and not expensive construction. It is also an object of the invention to provide a sealing ring for such a piston to create, which is characterized by a good sealing effect and is easy to replace, since in the event of damage when metal solidifies, only the sealing ring is damaged shall be.
  • the object is achieved by a sealing ring with the features specified in claim 1 and a piston with the features specified in claim 4 solved.
  • the sealing function of the sealing ring is always fulfilled even in the relaxed rest position.
  • a sealing ring according to Claim 2 With the formation of the sealing ring according to Claim 2 he constantly exerts a pressing force on the casting cylinder.
  • a sealing ring According to claim 3 is particularly well suited for casting zinc alloys.
  • a piston according to claim 5 gives excellent sealing effect and homogeneous pressure build-up of the casting metal, allows a small overall length of the casting cylinder and piston and easy interchangeability of the sealing ring.
  • the sealing ring is first damaged, so that only this needs to be replaced.
  • the piston 1 made of steel with its piston body 2 (FIG. 1) is also only indicated made of steel casting cylinder 3 (Fig. 5) axially.
  • the piston body 2 goes About a cone part 4 in the piston rod 5, with a drive, not shown for the axial movement is connected.
  • a piston groove 9 is attached to the piston body 2.
  • 2 to 4 show the sealing ring 11 made of spring steel with a slot 10 in the relaxed rest position, in which its outer diameter is larger than that Is the inside diameter of the casting cylinder and wherein the ring body 12 is an annular web 13 having.
  • the slot 10 is designed as a step slot, the slot surfaces 14, 15, 16, 17, 18, 19 extending in the circumferential direction and displaceable relative to one another in the circumferential direction, form sealing step transition surfaces 15, 18.
  • the sealing ring 11 In the relaxed rest position, the sealing ring 11 lies with the open slot 10 above it Piston web 6 of the piston 1 (FIG. 5) before it is inserted into the casting cylinder 3.
  • the sealing ring 11 When inserting the piston 1 into the casting cylinder 3, the sealing ring 11 is through the Tapered surface 20 pressed into its working position (Fig. 6), in which the Sealing ring 11 from the casting cylinder 3 with the ring body 12 against the piston web 6 and is pressed with the ring web 13 into the piston groove 9, but itself because of its spring property exerts a counterforce on the casting cylinder.
  • the inside diameter of the Casting cylinder 3, the outer diameter of the sealing ring 11 and the outer diameter of the piston body 2 are almost identical, but in the above Order should be minimally smaller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Sealing Devices (AREA)
EP19970810643 1997-09-09 1997-09-09 Piston pour une machine à couler sous pression à chambre chaude Expired - Lifetime EP0901852B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES97810643T ES2178746T3 (es) 1997-09-09 1997-09-09 Piston para una maquina de fundicion a presion con camara caliente.
EP19970810643 EP0901852B1 (fr) 1997-09-09 1997-09-09 Piston pour une machine à couler sous pression à chambre chaude
DE59707737T DE59707737D1 (de) 1997-09-09 1997-09-09 Kolben für eine Warmkammer-Druckgiessmachine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19970810643 EP0901852B1 (fr) 1997-09-09 1997-09-09 Piston pour une machine à couler sous pression à chambre chaude

Publications (2)

Publication Number Publication Date
EP0901852A1 true EP0901852A1 (fr) 1999-03-17
EP0901852B1 EP0901852B1 (fr) 2002-07-17

Family

ID=8230371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970810643 Expired - Lifetime EP0901852B1 (fr) 1997-09-09 1997-09-09 Piston pour une machine à couler sous pression à chambre chaude

Country Status (3)

Country Link
EP (1) EP0901852B1 (fr)
DE (1) DE59707737D1 (fr)
ES (1) ES2178746T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10040578C1 (de) * 2000-08-18 2001-10-25 Kunz Susanne Druckgießkolben, insbesondere für Vakuum-Druckgießmaschinen
WO2004110679A1 (fr) * 2003-06-13 2004-12-23 Allper Ag Piston destine a une machine pour coulee sous pression en chambre froide
WO2015054776A1 (fr) 2013-10-18 2015-04-23 Exco Technologies Limited Bague d'usure pour un piston de moulage sous pression, piston de moulage sous pression incorporant cette dernière, et son procédé de fabrication
US10718433B2 (en) * 2017-05-05 2020-07-21 Exco Technologies Limited Wear ring for die-casting piston, and die-casting piston incorporating same

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1492043A (en) * 1922-08-17 1924-04-29 Mattson Leroy Piston and ring
DE742182C (de) * 1940-09-15 1943-11-24 Mueller Fritz Pressenfab Pressstempel fuer Spritz- und Pressgiessmaschinen
GB812536A (en) * 1957-10-11 1959-04-29 Dow Chemical Co Piston assembly
DE1080739B (de) * 1957-11-16 1960-04-28 Friedr Fingscheidt G M B H Kolben fuer Druckgiessmaschinen
DE1272492B (de) * 1965-05-03 1968-07-11 Gen Motors Corp Druckgiessmaschine
SU1752501A1 (ru) * 1990-03-26 1992-08-07 Т.И, Кожокин Поршневой узел машины лить под давлением
US5350007A (en) * 1992-01-30 1994-09-27 Nippon Light Metal Co., Ltd. Injection apparatus for a hot-chamber die-cast machine
EP0423413B1 (fr) * 1989-10-18 1997-04-02 Allper Ag Piston, notamment pour un appareil de coulée sous pression

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1492043A (en) * 1922-08-17 1924-04-29 Mattson Leroy Piston and ring
DE742182C (de) * 1940-09-15 1943-11-24 Mueller Fritz Pressenfab Pressstempel fuer Spritz- und Pressgiessmaschinen
GB812536A (en) * 1957-10-11 1959-04-29 Dow Chemical Co Piston assembly
DE1080739B (de) * 1957-11-16 1960-04-28 Friedr Fingscheidt G M B H Kolben fuer Druckgiessmaschinen
DE1272492B (de) * 1965-05-03 1968-07-11 Gen Motors Corp Druckgiessmaschine
EP0423413B1 (fr) * 1989-10-18 1997-04-02 Allper Ag Piston, notamment pour un appareil de coulée sous pression
SU1752501A1 (ru) * 1990-03-26 1992-08-07 Т.И, Кожокин Поршневой узел машины лить под давлением
US5350007A (en) * 1992-01-30 1994-09-27 Nippon Light Metal Co., Ltd. Injection apparatus for a hot-chamber die-cast machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET PATENTS ABSTRACTS Section Ch Week 9330, Derwent World Patents Index; Class M22, AN 93-241611, XP002056560 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10040578C1 (de) * 2000-08-18 2001-10-25 Kunz Susanne Druckgießkolben, insbesondere für Vakuum-Druckgießmaschinen
WO2004110679A1 (fr) * 2003-06-13 2004-12-23 Allper Ag Piston destine a une machine pour coulee sous pression en chambre froide
WO2015054776A1 (fr) 2013-10-18 2015-04-23 Exco Technologies Limited Bague d'usure pour un piston de moulage sous pression, piston de moulage sous pression incorporant cette dernière, et son procédé de fabrication
CN106061653A (zh) * 2013-10-18 2016-10-26 埃克斯科科技有限公司 用于压铸活塞的磨损环、包括该磨损环的压铸活塞以及形成该磨损环的方法
JP2016533271A (ja) * 2013-10-18 2016-10-27 エクスコ テクノロジーズ リミテッドＥｘｃｏ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｌｉｍｉｔｅｄ ダイカストピストンのための摩耗リング、摩耗リングを組み込んだダイカストピストン、及び、摩耗リングを形成する方法
US9587742B2 (en) 2013-10-18 2017-03-07 Exco Technologies Limited Wear ring for die-casting piston, die-casting piston incorporating same, and method of forming same
EP3057726A4 (fr) * 2013-10-18 2017-05-17 Exco Technologies Limited Bague d'usure pour un piston de moulage sous pression, piston de moulage sous pression incorporant cette dernière, et son procédé de fabrication
US10718433B2 (en) * 2017-05-05 2020-07-21 Exco Technologies Limited Wear ring for die-casting piston, and die-casting piston incorporating same

Also Published As

Publication number Publication date
ES2178746T3 (es) 2003-01-01
EP0901852B1 (fr) 2002-07-17
DE59707737D1 (de) 2002-08-22

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