EP0400274B1 - Récipient de coulée pour machines à couler sous pression à chambre chaude - Google Patents

Récipient de coulée pour machines à couler sous pression à chambre chaude Download PDF

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Publication number
EP0400274B1
EP0400274B1 EP90103944A EP90103944A EP0400274B1 EP 0400274 B1 EP0400274 B1 EP 0400274B1 EP 90103944 A EP90103944 A EP 90103944A EP 90103944 A EP90103944 A EP 90103944A EP 0400274 B1 EP0400274 B1 EP 0400274B1
Authority
EP
European Patent Office
Prior art keywords
bend
casting
gooseneck
tube
casting chamber
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
EP90103944A
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German (de)
English (en)
Other versions
EP0400274A3 (fr
EP0400274A2 (fr
Inventor
Roland Fink
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.)
Oskar Frech GmbH and Co KG
Original Assignee
Oskar Frech GmbH and Co KG
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 Oskar Frech GmbH and Co KG filed Critical Oskar Frech GmbH and Co KG
Publication of EP0400274A2 publication Critical patent/EP0400274A2/fr
Publication of EP0400274A3 publication Critical patent/EP0400274A3/fr
Application granted granted Critical
Publication of EP0400274B1 publication Critical patent/EP0400274B1/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
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
    • B22D17/04—Plunger machines
    • 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
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted

Definitions

  • the invention relates to a casting tank for hot-chamber die casting machines, which is cast in one piece from a heat-resistant tool steel and which has a casting chamber with the treads for the casting piston, as well as an approximately parallel riser hole, which is cast as a, in the area of the mouths to the casting chamber and a nozzle bent tube is designed.
  • Such a casting container is known from DE-OS 27 21 928. This casting container is used in particular to hold aluminum.
  • the casting chamber merges into a porous, one-piece tube made of a ceramic material, which serves as a riser bore and is cast into the main body of the casting chamber.
  • the riser hole is cast in with the aid of inserted cores.
  • the riser bore is led axially out of the casting container at one end and is closed there by an inserted screw.
  • the connection to the casting chamber is made via a channel running perpendicular to the riser bore, which is also through an inserted core was produced and must also be closed to the outside by a screw. Both the riser hole and the transverse channel must therefore be machined in a relatively complex manner. This also applies to the connection cone for the nozzle provided in the area of the mouthpiece.
  • the right-angled transition from the connecting channel to the riser bore and the approximately right-angled transition, also provided in the area of the mouthpiece, result in pressure losses for the flowing melt, which can have a disadvantageous effect on the working speed.
  • the invention has for its object to design a casting container of the latter type so that pressure losses can be avoided and expensive machining operations can be saved.
  • the tube is welded together from at least two parts, one of which is designed as a bend provided with a mouthpiece for attaching the nozzle.
  • This configuration makes it possible, on the one hand, to effect the transition into the parallel part of the riser pipe with the aid of a favorable flow deflection.
  • the welded design of the tube makes it possible to choose the geometry of the tube differently and to adapt it to the loads to be expected both for the deflection of the melt and for the loads to be expected due to the temperatures occurring.
  • the riser pipe is assembled in a particularly advantageous manner from a first elbow in the area of the mouth to the casting chamber, from a substantially straight pipe section adjoining this and from a second elbow adjoining the pipe section in the area of the mouthpiece.
  • both elbows can be individually adapted to the respective requirements without taking into account the dimensions of the straight line in between Pipe piece must be taken.
  • the second manifold can, according to the features of claim 3, advantageously also consist of one piece with a receiving cone for the nozzle, so that here too there are no interface problems.
  • the wall thickness of the receiving cone can increase towards the opening, so that the wall thickness at the critical point meets the loads that occur.
  • subclaims 5 to 7 it is also possible to change the inside diameter of the elbow and to make it smaller in the direction of flow of the melt, so that an adaptation to the fluidic requirements is possible.
  • subclaims 8 to 10 it is also possible to make the radii of curvature different and to design the wall thicknesses of the manifold parts differently, and to adapt them to the requirements that arise.
  • the hot chamber die casting machine shown in FIG. 1 has a casting container (1) which is inserted from above into a trough (2) in which there is a molten metal.
  • the metal to be melted is introduced into the trough through an opening closed with a flap (3).
  • the trough (2) is arranged in an oven (4) so that the metal particles which have been introduced can be melted in it.
  • a thermometer (5) is immersed, by means of which the temperature prevailing in the area of the casting container (1) can be monitored.
  • the casting container (1) which is held by a crossmember (6), has a casting chamber (7) and a riser bore (9) connected to it, which leads to a mouthpiece (10) on which an inclined nozzle (11) is arranged.
  • the casting chamber (7) consists of a sleeve-shaped part which is inserted in the casting container (1) and is shown in FIG. 2.
  • a casting piston (12) is guided in the casting chamber (7) and is connected to a hydraulic cylinder (15) via a piston rod (13) and a coupling (14).
  • the casting piston is in its top dead center position as shown in FIG. 1. Below this dead center position there are several bores (16) distributed uniformly over the circumference in the casting container (1), which connect the casting chamber (7) to the trough (2).
  • the metal melt runs through the bores (16) into the casting chamber (7), from which it is pressed out via the riser bore (9) with the nozzle (11) by lowering the casting piston (12).
  • the melt can flow back into the area of the riser hole (9) when the casting piston (12) is withdrawn from the nozzle (11), so that it remains within the heated area and does not solidify.
  • the inside diameter of the upwardly open casting container (1) widens above the casting chamber (7). This area is also connected to the trough (2) via openings (17), so that the casting piston is also surrounded on its upper side by the melt.
  • the casting container (1) shown in FIG. 2 is made as a casting from a heat-resistant tool steel alloy. Cast cast containers have economic advantages over a forged version. Also in modern hot chamber die casting machines, because of the higher casting pressures (up to 400 bar) necessary high-quality hot-work steels can be cast.
  • the casting container (1) is provided with a riser hole (9) which consists of a pipe (18) cast in, which is welded together from three parts.
  • the pipe (18) consists on the one hand of a bend (19) adjoining the casting chamber (7), an adjacent cylindrical pipe section (20) and a second bend (21) adjacent to the pipe section (20) in the region of the mouthpiece (10) ).
  • the inside diameter of the first elbow (19) decreases from the mouth (22) to the casting chamber (7) up to the connection to the pipe section (20), which means that the inside diameter of the elbow (19) at the connection point to the pipe section ( 20) corresponds to the inside diameter (d) of the pipe section (20), but has the larger diameter (d 1) at the mouth (22).
  • the mouth (22) is opposite an opening in the casting chamber (7), which has a diameter (d0) which is larger than (d1).
  • the second elbow (21) also has at its connection point to the pipe section (20) the inner diameter (d), in the region of its mouth (23) in a receiving cone (24), however, the diameter (d2), which is smaller than the diameter (d ) is.
  • the diameter d1 16 mm
  • the diameter d 14 mm
  • the diameter d2 12 mm.
  • the elbow (21) is provided with a receiving cone (24) for the nozzle (11).
  • This receiving cone (24) is arranged in one piece on the manifold (21).
  • the cone angle of which can be approximately 5 ° the elbow (21) has an outwardly increasing wall thickness, the outer wall of the receiving cone (24) being at a larger cone angle than the receiving cone (24) itself, in the exemplary embodiment under a cone angle of 10 °, in the outer wall of the manifold part.
  • the second elbow (21) therefore has an outer diameter (D) in the exemplary embodiment at the connection point to the pipe section (20) which corresponds to the outer diameter (D) of the pipe section (20) while it has a diameter (D M ) at the mouth (10) has that is much larger.
  • the diameter D 24 mm
  • the diameter D M 40 mm.
  • the radii of curvature of the manifolds (19, 21) are also different. So the first manifold (19) has an inner radius (R1) which is greater than the inner radius (R2) of the second manifold (21); the outer radius of curvature (R3) of the first elbow (19) is larger than the outer radius of curvature (R4) of the second elbow (21).
  • the inner radius R1 9 mm
  • the outer radius of the first elbow R3 35 mm
  • the outer radius of the second elbow R4 31 mm.
  • the first elbow (19) which is welded to the pipe section (20) at the point (25), is adapted to the requirements of the flow of the molten metal occurring at this point.
  • the 90 ° transition takes place without sharp corners, so that pressure losses or turbulence cannot occur in the melt pressed out of the casting chamber (7).
  • the second elbow (21), which is welded to the pipe section (20) at the point (26), is individually adapted to the requirements that arise. Its inner diameter also tapers in the direction of flow, like the inner diameter of the first elbow (19).
  • the second elbow (21) is also provided in one piece with the receiving cone (24), so that no difficulties arise at the connection point for the nozzle (11) at this point either.
  • the wall thicknesses, in particular of the second elbow (21) in the region of the receiving cone (24) are also selected such that they meet the required requirements Withstand loads without the need for extensive reworking on the finished casting tank.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Chain Conveyers (AREA)

Claims (10)

  1. Col de cygne (1) pour machine à couler sous pression à chambre chaude, qui est moulé en une seule pièce en un acier d'outillage résistant à la chaleur, et présente une chambre d'injection (7) munie de surfaces de coulissement pour le piston d'injection, ainsi qu'un canal de refoulement (9) à peu près parallèle à cette chambre, qui est formé d'un tube (18) incorporé au moulage et recourbé dans la région des débouchés donnat vers la chambre d'injection (7) et vers une buse (11), caractérisé en ce que le tube (18) est formé d'au moins deux parties assemblées par soudage, dont une constitue un coude (21) muni d'un nez (10) pour la mise en place de la buse (11).
  2. Col de cygne selon la revendication 1, caractérisé en ce que le tube (18) est composé d'un premier coude (19) dans la région du débouché donnant vers la chambre d'injection (7), d'un tronçon de tube sensiblement droit (20) qui y fait suite et du deuxième coude (21) qui fait suite au tronçon de tube (20).
  3. Col de cygne selon les revendications 1 et 2, caractérisé en ce que le deuxième coude (21) est composé d'une pièce présentant un cône récepteur (24) pour recevoir la buse.
  4. Col de cygne selon la revendication 3, caractérisé en ce que l'épaisseur de paroi du cône récepteur (4) croît en direction de l'ouverture (17).
  5. Col de cygne selon une des revendications 1 à 3, caractérisé en ce que le diamètre intérieur du deuxième coude (21) est adapté au diamètre intérieur (d) du tronçon de tube (20) sur un côté, et décroît vers le cône récepteur (24).
  6. Col de cygne selon une des revendications 1 à 5, caractérisé en ce que le tronçon de tube (20) est de configuration cylindrique.
  7. Col de cygne selon une des revendications 1 à 6, caractérisé en ce que le premier coude (19) présente, sur le côté adjacent au troncon de tube (20), un diamètre intérieur adapté au diamètre intérieur (d) du tronçon de tube (20) mais présente un plus grand diamètre (d₁) au débouché (22) donnant vers la chambre d'injection (7).
  8. Col de cygne selon une des revendications 1 à 7, caractérisé en ce que les rayons de courbure (R₁ et R₃) du premier coude (19) sont plus grands que les rayons de courbure (R₂ et R₄) du deuxième coude (21).
  9. Col de cygne selon une des revendications 1 à 8, caractérisé en ce que les épaisseurs de paroi du deuxième coude (21) sont plus grandes que celles du premier coude (19).
  10. Col de cygne selon la revendication 9, caractérisé en ce que les épaisseurs de paroi du deuxième coude (21) croissent en direction du cône récepteur (24) dans la région des rayons de courbure (R₂, R₄).
EP90103944A 1989-05-30 1990-03-01 Récipient de coulée pour machines à couler sous pression à chambre chaude Expired - Lifetime EP0400274B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3917487A DE3917487A1 (de) 1989-05-30 1989-05-30 Giessbehaelter fuer warmkammer-druckgiessmaschinen
DE3917487 1989-05-30

Publications (3)

Publication Number Publication Date
EP0400274A2 EP0400274A2 (fr) 1990-12-05
EP0400274A3 EP0400274A3 (fr) 1992-04-08
EP0400274B1 true EP0400274B1 (fr) 1993-12-01

Family

ID=6381633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90103944A Expired - Lifetime EP0400274B1 (fr) 1989-05-30 1990-03-01 Récipient de coulée pour machines à couler sous pression à chambre chaude

Country Status (5)

Country Link
US (1) US5072778A (fr)
EP (1) EP0400274B1 (fr)
JP (1) JP3014715B2 (fr)
DE (2) DE3917487A1 (fr)
ES (1) ES2047176T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1260341B (it) * 1992-05-26 1996-04-05 Pressocolatrice a camera calda per leghe leggere
DE4419848C1 (de) * 1994-06-07 1995-12-21 Frech Oskar Gmbh & Co Warmkammer-Druckgießmaschine
DE4439871C1 (de) * 1994-11-08 1996-01-04 Friedrich Druckgiestech Gmbh Gießbehälter
ES2177495T3 (es) * 2000-08-21 2002-12-16 Frech Oskar Gmbh & Co Procedimiento para la fabricacion de un recipiente de colada y recipiente de colada.
DE102004027109A1 (de) * 2004-06-03 2005-12-29 Siempelkamp Giesserei Gmbh Verfahren zur Herstellung eines eine Gravur aufweisenden, temperierbaren Werkzeugs im Wege des Gießens
JP5615640B2 (ja) * 2010-09-16 2014-10-29 株式会社広築 非鉄金属の溶湯供給装置
IT201700033183A1 (it) * 2017-03-27 2018-09-27 Flavio Mancini Impianto per la pressofusione a camera calda di leghe non ferrose

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2721928A1 (de) * 1976-05-20 1977-12-08 Toshiba Machine Co Ltd Pumpe zur verwendung in einer spritzgussmaschine der heisskammerbauart

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1878490U (de) * 1963-01-03 1963-08-29 Ewald Schulte Druckgussmaschine zur verarbeitung von zink- oder aehnlichen metallegierungen.
DE2143937B2 (de) * 1971-09-02 1977-05-18 Oskar Frech, Werkzeugbau, 7061 Weiler Giessbehaelter fuer eine warmkammer- druckgiessmaschine
JPS555139A (en) * 1978-06-24 1980-01-16 Toshiba Mach Co Ltd Injection pump device for molten metal
US4556098A (en) * 1978-08-18 1985-12-03 Laboratoire Suisse De Recherches Horlogeres Hot chamber die casting of aluminum and its alloys
US4587177A (en) * 1985-04-04 1986-05-06 Imperial Clevite Inc. Cast metal composite article

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2721928A1 (de) * 1976-05-20 1977-12-08 Toshiba Machine Co Ltd Pumpe zur verwendung in einer spritzgussmaschine der heisskammerbauart

Also Published As

Publication number Publication date
JPH035056A (ja) 1991-01-10
DE3917487A1 (de) 1990-12-06
EP0400274A3 (fr) 1992-04-08
ES2047176T3 (es) 1994-02-16
DE59003655D1 (de) 1994-01-13
US5072778A (en) 1991-12-17
JP3014715B2 (ja) 2000-02-28
EP0400274A2 (fr) 1990-12-05

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