WO2009146568A1 - Piston de coulée à insérer dans une chambre de coulée - Google Patents

Piston de coulée à insérer dans une chambre de coulée Download PDF

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Publication number
WO2009146568A1
WO2009146568A1 PCT/CH2009/000181 CH2009000181W WO2009146568A1 WO 2009146568 A1 WO2009146568 A1 WO 2009146568A1 CH 2009000181 W CH2009000181 W CH 2009000181W WO 2009146568 A1 WO2009146568 A1 WO 2009146568A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
casting
skirt
carrier
spring
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.)
Ceased
Application number
PCT/CH2009/000181
Other languages
German (de)
English (en)
Inventor
André MUELLER
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
Publication of WO2009146568A1 publication Critical patent/WO2009146568A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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

  • Casting piston for insertion in a casting chamber
  • the present invention relates to a casting piston for insertion into the casting chamber of a die casting machine with a piston skirt arranged on a piston carrier.
  • Such casting pistons are known and they are mainly used for the production of aluminum or magnesium die casting.
  • To seal against the casting chamber they are very often provided with at least one sealing ring.
  • the disadvantage of such sealing rings is that they wear out quickly or lose their spring force and thus have to be replaced by new sealing rings.
  • the invention now has the task of finding a better solution instead of the sealing rings or for pistons without sealing ring.
  • the casting piston for insertion into the casting chamber of a die casting machine arranged on a piston carrier piston skirt according to the characterizing part of claim 1, characterized in that the sealing of the existing steel or a high-quality copper alloy piston skirt against the casting chamber with a slotted Federbüchse is provided from a highly wear-resistant copper alloy whose outer diameter in the relaxed state is slightly larger than the inner diameter of the casting chamber, wherein the slot is formed by at least one tooth of a bushing part which engages in at least one groove of the other bushing part.
  • Fig. 3 is a perspective view of the spring sleeve of Fig. 1
  • Fig. 4 shows a longitudinal section through the casting piston in the assembled state with the view B and the detail F but with a 4 is a perspective view of the spring bushing of FIG
  • FIG. 1 to 3 8 is a perspective view of the individual parts of the disassembled casting piston of Fig. 4 to 6
  • FIG. 11 shows a cross section through a casting piston with a further modification.
  • the casting piston 1 of Fig. 1 is composed of a piston carrier 2, a piston skirt 3 and the spring sleeve 4, wherein the individual parts are shown particularly clearly in Fig. 7.
  • the piston carrier 2 is fastened with cams 5 (FIG. 7) in corresponding grooves 6 (FIG. 2) of the piston skirt 3 in a known manner by means of a bayonet catch.
  • the spring sleeve 4 (FIG. 3) has a slot 7 and three elongate recesses 8.
  • the slot 7 is formed by teeth 9 and grooves 10 of a bushing part, which engage in corresponding grooves 11 and teeth 12 of the other bushing portion under the variable due to the spring action of the spring sleeve 4 distance of the slot, resulting in an excellent sealing effect in the axial direction.
  • the spring sleeve 4 is screwed by means of three Allen screws 13, which are guided through corresponding holes 14 of the piston skirt 3, with the piston carrier 2.
  • the spring sleeve 4 can move freely on the piston skirt 3 in the radial direction while being held in position in the axial direction when the casting piston is withdrawn. Since the holes 14 have a larger diameter than the screw diameter and thus a clearance S1 is formed, the piston skirt 3 is secured against radial rotation, while thermal expansions are made possible in the axial direction. As can be clearly seen in Fig. 5, the screws 13 are screwed on a fit 15 in the piston carrier 2 and thus secured against loosening.
  • the distance of the slot 7 is relatively small, so that it is no longer apparent from the drawing that the diameter of the spring sleeve 4 in both the relaxed and in the compressed state is even greater than the diameter of the piston skirt 3.
  • the spring sleeve 4 is compressed, while it widened after insertion by the spring action and is pressed against the Giesshuntwand and thus excellent seals. Even if the surface of the spring sleeve 4 is removed by closure, the sealing effect is maintained because of their spring properties and by the penetration of aluminum between the piston and spring bush.
  • the spring sleeve 4 is made of a highly wear-resistant copper alloy, wherein the spring properties are preferably obtained by cold rolling.
  • the casting piston of Figs. 4 to 6 and 8 shows a possible variant of the spring sleeve 4, in which the elongated recesses 8 are arranged for guiding the Allen screws 13 on extended tabs 16 of the sleeve.
  • Fig. 9 shows a variant of the casting piston, wherein the spring sleeve 4 is no longer fixed with screws in the casting piston, but is clamped in a jacket-shaped recess 20 of the piston skirt 3 by means of an annular pressure holder 21.
  • the presser holder 21 is held with screws 22 against rotation in the piston carrier 2.
  • the piston skirt 3 is provided on its front side with annularly arranged funnel-shaped openings 23 through which aluminum between the piston skirt 3 and spring sleeve 4 for reinforcing the sealing effect can occur.
  • two small annular openings 24 may be arranged, which are filled with solidified aluminum or impurities and thus retain the liquid aluminum in the gap between the piston skirt 3 and spring sleeve 4.
  • a known Giesskolben is shown with a sealing ring 25 which is additionally provided with a spring sleeve 4, which is clamped in the same manner as in Fig. 9 in a recess 20 of the piston skirt 3 by means of a presser holder 21.
  • a spring box can be mounted on the original casting piston.
  • the spring sleeve 4 is clamped as shown in Fig. 9 also with a pressure holder 21.
  • the presser holder 21 is fastened with a screw 22 in the piston carrier 2 and the screw 22 is centered opposite to a position pin 26 in the piston carrier 2. With this casting piston, the best results are obtained in the casting operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

L'invention concerne un piston de coulée (1) à insérer dans la chambre de coulée d'une machine à coulée sous pression et sur le support (2) duquel une enveloppe de piston (3) est disposée. À la place d'une bague d'étanchéité connue ou dans le cas d'un piston sans bague d'étanchéité qui est également soumis à une grande usure, une douille à ressort fendue (4) en alliage de cuivre très résistant à l'usure est placée sur l'enveloppe de piston (3) au moyen de vis à six pans creux (13). La douille à ressort (4) présente une usure moindre et un meilleur effet d'étanchéité, étant donné qu'elle est toujours pressée contre la paroi de la chambre de coulée en raison de son effet de ressort.
PCT/CH2009/000181 2008-06-05 2009-06-03 Piston de coulée à insérer dans une chambre de coulée Ceased WO2009146568A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH854/08 2008-06-05
CH8542008 2008-06-05

Publications (1)

Publication Number Publication Date
WO2009146568A1 true WO2009146568A1 (fr) 2009-12-10

Family

ID=41100464

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2009/000181 Ceased WO2009146568A1 (fr) 2008-06-05 2009-06-03 Piston de coulée à insérer dans une chambre de coulée

Country Status (1)

Country Link
WO (1) WO2009146568A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011052446A1 (de) * 2011-08-05 2013-02-07 Schmelzmetall Ag Druckgusskolbenkopf
WO2014161101A1 (fr) * 2013-04-04 2014-10-09 Murselaj Gani Piston pour coulée sous pression de métal
DE102015216946A1 (de) 2015-09-04 2017-03-09 Bayerische Motoren Werke Aktiengesellschaft Gießkolben
EP3108982A4 (fr) * 2014-02-21 2017-10-11 Alrotec Tecnology S.L.U. Piston pour machine d'injection à chambre froide
IT201800020062A1 (it) * 2018-12-18 2020-06-18 Copromec Die Casting S R L A Socio Unico Pistone per una macchina per la pressofusione
IT202000000553A1 (it) * 2020-01-14 2021-07-14 Copromec Die Casting S R L A Socio Unico Testa e pistone lubrificato

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3934778A1 (de) * 1988-12-28 1990-07-05 Allper Ag Kolben, insbesondere fuer eine druckgusspresse
DE102005048717A1 (de) * 2005-10-12 2007-04-19 Allper Ag Mehrteiliger Kolben für eine Kaltkammer-Giessmaschine
WO2007116426A1 (fr) * 2006-04-12 2007-10-18 Copromec S.R.L. Piston pour machine de coulee sous pression a chambre froide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3934778A1 (de) * 1988-12-28 1990-07-05 Allper Ag Kolben, insbesondere fuer eine druckgusspresse
DE102005048717A1 (de) * 2005-10-12 2007-04-19 Allper Ag Mehrteiliger Kolben für eine Kaltkammer-Giessmaschine
WO2007116426A1 (fr) * 2006-04-12 2007-10-18 Copromec S.R.L. Piston pour machine de coulee sous pression a chambre froide

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011052446A1 (de) * 2011-08-05 2013-02-07 Schmelzmetall Ag Druckgusskolbenkopf
WO2014161101A1 (fr) * 2013-04-04 2014-10-09 Murselaj Gani Piston pour coulée sous pression de métal
US9463505B2 (en) 2013-04-04 2016-10-11 Gani MURSELAJ Piston for metal die casting
EP3108982A4 (fr) * 2014-02-21 2017-10-11 Alrotec Tecnology S.L.U. Piston pour machine d'injection à chambre froide
DE102015216946A1 (de) 2015-09-04 2017-03-09 Bayerische Motoren Werke Aktiengesellschaft Gießkolben
IT201800020062A1 (it) * 2018-12-18 2020-06-18 Copromec Die Casting S R L A Socio Unico Pistone per una macchina per la pressofusione
IT202000000553A1 (it) * 2020-01-14 2021-07-14 Copromec Die Casting S R L A Socio Unico Testa e pistone lubrificato
WO2021144722A1 (fr) * 2020-01-14 2021-07-22 COPROMEC DIE CASTING S.r.l. A SOCIO UNICO Tête et piston lubrifié
US12325064B2 (en) 2020-01-14 2025-06-10 COPROMEC DIE CASTING S.r.l. A SOCIO UNICO Head and lubricated piston

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