EP0603631B1 - Dispositif de moulage par injection - Google Patents

Dispositif de moulage par injection Download PDF

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Publication number
EP0603631B1
EP0603631B1 EP93119671A EP93119671A EP0603631B1 EP 0603631 B1 EP0603631 B1 EP 0603631B1 EP 93119671 A EP93119671 A EP 93119671A EP 93119671 A EP93119671 A EP 93119671A EP 0603631 B1 EP0603631 B1 EP 0603631B1
Authority
EP
European Patent Office
Prior art keywords
casting
lubricant
piston
piston rod
die casting
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
EP93119671A
Other languages
German (de)
English (en)
Other versions
EP0603631A1 (fr
Inventor
Friedrich Dr.-Ing. Stummer
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.)
Mueller Weingarten AG
Original Assignee
Maschinenfabrik Mueller Weingarten AG
Mueller Weingarten 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 Maschinenfabrik Mueller Weingarten AG, Mueller Weingarten AG filed Critical Maschinenfabrik Mueller Weingarten AG
Publication of EP0603631A1 publication Critical patent/EP0603631A1/fr
Application granted granted Critical
Publication of EP0603631B1 publication Critical patent/EP0603631B1/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

Definitions

  • the invention relates to a casting set for a die casting machine according to the preamble of claim 1.
  • Another method of applying lubricant provides that a head movable into the casting chamber is inserted from the mold side in order to apply and distribute the lubricant over almost the entire length of the casting chamber.
  • a casting piston lubrication has also become known, in which the lubricant is also supplied via feed lines leading in the longitudinal direction of the casting piston, the lubricant being discharged via bores on the lateral surface of the casting piston.
  • the lubricant can only reach the outer surface of the casting piston by dispensing it through the bores of the casting piston in order to form a lubricating film between the casting piston and the interior of the casting chamber.
  • the invention has for its object to improve such lubrication systems for the casting piston even more, at the same time an improved guidance of the casting piston is achieved within the casting chamber.
  • the casting set according to the invention with the characterizing features of claim 1 has the advantage over the known devices that improved lubrication is achieved in the form of spray oil lubrication on the inner wall of the casting chamber.
  • the basic idea from DE-AS 21 62 186 is further developed in such a way that the spraying agent can be applied even more specifically and efficiently by providing an additional guide body behind the casting piston on the piston rod, which takes over additional guidance of the casting piston rod within the casting chamber, wherein the lubricant supply is provided between the casting piston and the guide body.
  • the additional guide body has several tasks and advantages.
  • a main task of the guide body lies in the additional guidance of the piston rod, in particular when the casting piston emerges from the mold side during its forward movement in the casting chamber, for example in order to push out metal flakes. Furthermore, the guide body can serve in its forward movement to specifically cover the fill opening for the molten metal into the casting chamber in order to prevent lubricant from getting into these fill openings.
  • the lubricant is applied in connection with blown air.
  • This discharge can be done by a common Discharge opening or through separate discharge openings.
  • the guide body can serve for the targeted atomization of the lubricant by means of a blower body integrated in the guide body.
  • the guide body is provided on the casting piston side with a pocket, recess or the like, in which the blow body is integrated and the exiting blowing air is deflected.
  • the invention relates to a casting set 1, as shown in part in Figures 2a, 2b and 3, for a die casting machine, not shown.
  • the casting set 1 consists of a casting chamber 2 and a casting piston 3, which is guided in the casting chamber 2 and can be actuated by a casting piston rod or piston rod 4 by means of a casting drive (not shown).
  • a casting piston rod or piston rod 4 by means of a casting drive (not shown).
  • the casting piston 3 is shown enlarged with piston rod 4.
  • the piston rod 4 contains the usual supply and discharge for a casting piston cooling medium via the connecting lines 5, 6.
  • a first longitudinal groove 7 for receiving a lubricant feed line 8 is introduced into the piston rod 4.
  • the lubricant feed line 8 opens in the front region of the piston rod 4 in a lubricant application body 9, which is designed as an annular or longitudinal body 10 with a plurality of outlet bores 11.
  • a second longitudinal groove 12 for receiving a further feed line 13 for blown air is introduced into the casting piston rod 4, which ends at its end on the piston side in a blowing body 14 which is arranged directly next to the application body 9.
  • the blower body 14 also consists of a transverse groove or annular groove 15 with a row of air outlet bores 16.
  • the supply of lubricant to the lubricant supply line 8 is indicated by arrow 17, the supply of blown air to the supply line 13 by the supply opening 18.
  • the piston rod 4 also carries a guide body 19, the edge 20 of which on the casting piston side is arranged at a distance a from the rear edge 21.
  • the diameter d 1 of the piston rod 4 in this intermediate area 22 is smaller than the diameter d 2 of the casting piston 3, so that there is a free annular space 23 for the discharge of the lubricant between the piston rod 4 and the inner surface 24 of the casting chamber.
  • This annular space 23 is indicated schematically in FIG. 1 by a dashed line.
  • the lubricant applied by the application body 9 can mix with the air discharged from the blow body and thus form an atomization of the lubricant liquid, which is located exclusively in the annular space 23.
  • the lubricant atomized in this way cannot therefore be carried over.
  • the guide body 19 has a recess 25 with the width c on its end 20 on the piston side.
  • This recess can be designed as a pocket or undercut to form an annular circumferential deflection surface 26.
  • the circumferential deflection surface 26 acts like a nozzle directed towards the casting piston 3 in order to deflect the blowing air radially emerging from the blowing body 14 in the axial direction in the direction of the casting piston. This deflection of the blown air in the axial direction is shown schematically by arrow 27 for the uppermost blow hole 28 shown there.
  • the piston rod 4 can contain the further longitudinal groove 36 shown in FIG. 1, in which a discharge line 38 for lubricant is embedded.
  • the guide body 19 has a diameter d 3 and an axial length b.
  • the diameter d 3 corresponds approximately to the diameter d 2 of the casting piston 3 and this in turn corresponds to the diameter d 4 of the interior of the casting chamber 29.
  • the guide body 19 serves as an additional guide for the casting piston 3 with the casting piston rod 4 within the casting chamber 2 3 of importance when the casting piston 3 emerges from the casting chamber 2 at the mold end, for example to push tinsel or the like out of the interior of the casting chamber.
  • the guide body 19 remains within the casting chamber, so that the piston rod 4 with the casting piston 3 can easily be pulled back into the casting chamber.
  • the lubricant 31 atomized by means of blown air is sprayed onto the inner wall 24 of the casting chamber 2 in accordance with the arrow representation in FIG. 3.
  • the filling opening 32 to the casting chamber 2 for the molten metal to be filled can then be closed by means of the guide body 19 when the width b of the guide body 19 is equal to or slightly larger than the width d of the filling opening 32.
  • a conventional casting set with an upper filling opening 32 for molten metal is shown in FIG. 2a.
  • the filling opening 32 'with a diameter d' opens into the lower region of the casting chamber 2, the molten metal 33 being sucked in from a warming device 34 via a suction pipe 35 by applying vacuum to the mold.
  • the lubricant can therefore be applied by covering these filling openings 32, 32 'without influencing these openings.
  • the lubrication process for the casting piston within the casting chamber can thus take place during the advancement of the casting piston or during the mold spraying process without a loss of cycle time. As a result, no cycle time extensions in the casting process are required.
  • the guide body 19 fulfills several previously described tasks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Devices For Molds (AREA)

Claims (8)

  1. Garniture de coulée (1) pour une machine de coulée sous pression, constituée d'une chambre de coulée (2), d'un piston de coulée (3) guidé dans la chambre de coulée comportant une tige de piston de coulée (4) reliée à celui-ci, qui peut être actionnée par un entraînement de coulée, au moins un conduit d'amenée de lubrifiant (8) étant guidé à travers la tige de piston pour réaliser une lubrification du piston de coulée dans la chambre de coulée, conduit qui débouche dans des ouvertures de sortie (11) sur la surface d'enveloppe cylindrique de la tige de piston de coulée,
    caractérisée en ce que la tige de piston (4) présente, derrière le piston de coulée (3), un corps de guidage (19) supplémentaire, cylindrique, guidé dans la chambre de coulée (2), et en ce que l'amenée de lubrifiant est effectuée entre le piston de coulée (3) et le corps de guidage (19).
  2. Garniture de coulée selon la revendication 1,
    caractérisée en ce que le corps de guidage (19) présente un diamètre externe (d3), qui correspond sensiblement au diamètre interne (d4) de l'espace interne (29) de la chambre de coulée.
  3. Garniture de coulée selon la revendication 1 ou 2,
    caractérisée en ce que le corps de guidage (19) présente une longueur axiale (b) qui est supérieure ou identique à celle d'une ouverture de remplissage (32,32') pour le métal en fusion dans la chambre de coulée (2).
  4. Garniture de coulée selon une des revendications précédentes,
    caractérisée en ce que, entre le piston de coulée (3) et le corps de guidage (19), il est prévu au moins un corps d'application (9) comportant des perçages de sortie radiaux (11) pour du lubrifiant et/ou de l'air soufflé, qui est alimenté par au moins un conduit d'amenée (8) à travers la tige de piston (4).
  5. Garniture de coulée selon une des revendications précédentes,
    caractérisée en ce qu'un corps d'application (9) pour du lubrifiant et un corps de soufflage (14), disposé directement en aval, pour de l'air soufflé pour pulvériser le lubrifiant sont prévus entre le piston de coulée (3) et le corps de guidage (19), qui sont alimentés, à chaque fois, par des conduits d'alimentation séparés (8,13), à travers la tige de piston (4), en lubrifiant ou en air soufflé.
  6. Garniture de coulée selon la revendication 5,
    caractérisée en ce que le corps du guidage (19) présente, sur la face frontale (20) en regard du piston de coulée (3), une poche, un évidement ou une contre-dépouille (25), dans lequel le corps de soufflage (14) est avantageusement encastré ou intégré.
  7. Garniture de coulée selon la revendication 6,
    caractérisée en ce que la poche, l'évidement ou la contre-dépouille (25) est formé avec des surfaces de renvoi (26), de sorte que l'air soufflé est renvoyé à partir du corps de soufflage (14) en direction axiale vers le corps d'application du lubrifiant (9) (flèche 27).
  8. Garniture de coulée selon une des revendications précédentes,
    caractérisée en ce que, pour évacuer du lubrifiant en excès, il est prévu une autre rainure longitudinale (36) ayant un conduit d'évacuation (38) dans la tige de piston (4).
EP93119671A 1992-12-23 1993-12-07 Dispositif de moulage par injection Expired - Lifetime EP0603631B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4243827 1992-12-23
DE4243827A DE4243827A1 (de) 1992-12-23 1992-12-23 Gießgarnitur für eine Druckgießmaschine

Publications (2)

Publication Number Publication Date
EP0603631A1 EP0603631A1 (fr) 1994-06-29
EP0603631B1 true EP0603631B1 (fr) 1997-05-28

Family

ID=6476379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93119671A Expired - Lifetime EP0603631B1 (fr) 1992-12-23 1993-12-07 Dispositif de moulage par injection

Country Status (3)

Country Link
EP (1) EP0603631B1 (fr)
DE (2) DE4243827A1 (fr)
ES (1) ES2101931T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29721722U1 (de) * 1997-12-09 1998-01-29 Firma Kunz Konstruktion und Druckgießtechnik, 72636 Frickenhausen Druckgießkolben
DE19923341B4 (de) * 1999-05-21 2005-03-03 Audi Ag Verfahren zum Betreiben einer Druckgießmaschine sowie Druckgießmaschine zur Durchführung des Verfahrens
CN113579199A (zh) * 2021-07-21 2021-11-02 惠州市名博液态模锻有限公司 一种液态模锻机冲头润滑新方法
EP4194120A1 (fr) 2021-12-07 2023-06-14 Wieland-Werke AG Dispositif de moulage sous pression
CN115194117A (zh) * 2022-06-06 2022-10-18 深圳领威科技有限公司 加压式压射锤头润滑方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1095899A (en) * 1964-07-29 1967-12-20 Renault Automatic lubricating apparatus for an injection piston of a cold-chamber pressure casting machine
JPS4929215Y1 (fr) * 1970-12-15 1974-08-08
EP0394988B1 (fr) * 1989-04-25 1994-10-12 Maschinenfabrik Müller-Weingarten AG Dispositif de lubrication d'un piston d'injection d'une machine à couler sous pression
DE4019076A1 (de) * 1990-06-15 1991-12-19 Stahlschmidt Gmbh & Co Kg Druckgiesskolben
US5076343A (en) * 1990-08-24 1991-12-31 Briggs & Stratton Corporation Die cast plunger lubrication system

Also Published As

Publication number Publication date
DE59306595D1 (de) 1997-07-03
ES2101931T3 (es) 1997-07-16
DE4243827A1 (de) 1994-06-30
EP0603631A1 (fr) 1994-06-29

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