EP0894557B1 - Process for shape casting and mould therefore - Google Patents

Process for shape casting and mould therefore Download PDF

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Publication number
EP0894557B1
EP0894557B1 EP98104851A EP98104851A EP0894557B1 EP 0894557 B1 EP0894557 B1 EP 0894557B1 EP 98104851 A EP98104851 A EP 98104851A EP 98104851 A EP98104851 A EP 98104851A EP 0894557 B1 EP0894557 B1 EP 0894557B1
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EP
European Patent Office
Prior art keywords
casting
channel
mould
feed channel
casting mould
Prior art date
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Expired - Lifetime
Application number
EP98104851A
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German (de)
French (fr)
Other versions
EP0894557B2 (en
EP0894557A1 (en
Inventor
Herbert Dipl.-Ing. Grolla
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.)
Heinrich Wagner Sinto Maschinenfabrik GmbH
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Heinrich Wagner Sinto Maschinenfabrik GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners

Definitions

  • the invention relates to a method for casting a molding box casting mold from below in rising casting with a Casting compound from a pouring container through a riser that is used for the Inflow of the casting compound ascending into the mold from below is molded in the molding sand of the mold, immediately after Finished filling of the casting mold of the riser in the area of the molding sand interrupted and thus closed so that the casting mold of the Casting container is separable.
  • a method of the type mentioned above is e.g. from WO 95/32826 known, here a stamp placed on the outer surface of the mold and presses the molding sand into the pouring channel and closes it.
  • the area of attack for the stamp that presses on the sand became like this shaped that the stamp is moved approximately perpendicular to the pouring channel becomes.
  • the disadvantage of this known way of closing the pouring channel is that the molding sand tears at any point, so that a secure closure of the pouring channel does not always guarantee is.
  • the invention has for its object a method according to the preamble of claim 1 so that defined predetermined breaking points for the molding sand be formed inside the mold, so that the riser is securely and tightly closed.
  • the riser can be shut off safely because a defined one Shaped sand area inserted into the riser through the punch becomes.
  • a plug is advantageously arranged in the stamp channel ensures that the stamp channel is closed even after the riser channel has been closed remains closed.
  • the molding sand is exerted by a transverse to the axis of the riser displacing and / or compressing stamping force of at least one preferably the hydraulically operated pressure stamp constricts the riser, whereby by moving and / or compacting the molding sand the riser is closed.
  • the discharge pressure on the surface of the Casting compound turned off, so that the desired continuous work process is reached because the mold can now be replaced immediately.
  • a particularly advantageous embodiment of the invention is the casting process, when the casting compound in the casting container is on your Surface is exposed to a pneumatic delivery pressure and the casting compound by at least one vertical one immersed in the casting compound Riser pipe and through the one aligned with the riser pipe and with this one common riser for the inflow of the casting compound Riser channel pressed into the mold located above the riser pipe becomes.
  • the entire riser is vertical and is in the area of the riser of a constriction made in the mold.
  • a casting mold 1, 2 consists of two vertically divided Mold halves 1 and 2 with a mold cavity enclosed by molding sand 3, in which a central, vertically downward, in the molding sand molded riser 4 opens; the riser 4 with one best circular cross section, on the other hand, ends at the free end face 10 of a also vertical pipe 8 with the riser 4 is aligned and with this a riser permeable to a casting compound 7 4, 8 forms as long as the casting mold 1, 2 on a casting container 5, 6 is put on.
  • the casting container 5, 6 is composed of a crucible 6 and a put on the crucible 6 head piece 5, the crucible 6 tight closes and in addition to the centrally arranged riser 8 another Has pipe socket 9, both above the surface 11 of the in the The crucible 6 of the liquid casting compound 7 ends.
  • the pipe socket 9 is used for flow connection the casting container 5, 6 with a compressed air source.
  • the pressure stamp 13 in one the axis of the riser 4 in the vertical direction 14 into the mold 1, 2 is movable and thereby a stamp pressure on those located therein Mold sand.
  • the pressure stamp 13 exerts its stamp force directly to the mold 1, 2 completely filling and only the mold cavity 3 and the riser 4 leaving molding sand on, with the pressure stamp 13 (Fig. 2) so far into the Casting mold 1, 2 is retracted until the riser 4 is compressed and in its cross section pressed molding sand is interrupted and so Backflow of the casting compound 7 already filled into the mold cavity 3 is prevented becomes.
  • another, diametrically opposed to the first Stamp can be provided to be on the opposite Side of the mold 1, 2 also the molding sand accordingly load and in this way constrict the riser 4 from two sides to be able to.
  • FIGS. 3 to 6 there is a stamp channel 15 and 16 molded into the mold 1, 2, in the direction 14 and in its cross section is adapted to the pressure stamp 13 and up to the Rise channel 4 (Fig. 3, 4) or beyond (Fig. 5, 6) is sufficient.
  • the stamp channel 15 can serve only to to facilitate the work of the plunger 13 is in the arrangement of Fig. 4 a plug 17 is inserted into a matching stamping channel 16 which from the plunger 13 to the closure of the riser 4 is.
  • a plug 17 is inserted into a matching stamping channel 16 which from the plunger 13 to the closure of the riser 4 is.

Abstract

The method concerns casting, according to which a melt (7) from a melt container (5, 6) is introduced from below through a riser channel (4) in the mould sand into a mould (1, 2). The riser channel (4) in the mould sand is closed immediately after the end of the mould filling process so that the mould (1, 2) can be separated from the melt container (5, 6). The claimed mould has a channel with an open outer end in which a plunger is formed in the mould sand.

Description

Die Erfindung betrifft ein Verfahren für das Abgießen einer einen Formkasten aufweisenden Gießform von unten in steigendem Guss mit einer Gießmasse aus einem Gießbehälter durch einen Steigkanal, der für die Einströmung der von unten in die Gießform aufsteigend einlaufende Gießmasse im Formsand der Gießform eingeformt ist, wobei unmittelbar nach beendeter Füllung der Gießform der Steigkanal im Bereich des Formsandes unterbrochen und damit so verschlossen wird, dass die Gießform von dem Gießbehälter abtrennbar ist.The invention relates to a method for casting a molding box casting mold from below in rising casting with a Casting compound from a pouring container through a riser that is used for the Inflow of the casting compound ascending into the mold from below is molded in the molding sand of the mold, immediately after Finished filling of the casting mold of the riser in the area of the molding sand interrupted and thus closed so that the casting mold of the Casting container is separable.

Ein Verfahren der vorstehend genannten Art ist z.B. aus der WO 95/32826 bekannt, wobei hier ein Stempel auf die Außenfläche der Form aufgesetzt wird und den Formsand in den Eingießkanal drückt und diesen verschließt. Die Angriffsfläche für den Stempel, der auf den Sand aufdrückt, wurde so geformt, dass der Stempel in etwa senkrecht zum Eingießkanal verschoben wird. Der Nachteil dieser bekannten Art des Verschließens des Eingießkanales besteht darin, dass der Formsand an beliebigen Stellen einreißt, so dass ein sicherer Verschluss des Eingießkanales nicht in jedem Fall gewährleistet ist.A method of the type mentioned above is e.g. from WO 95/32826 known, here a stamp placed on the outer surface of the mold and presses the molding sand into the pouring channel and closes it. The area of attack for the stamp that presses on the sand became like this shaped that the stamp is moved approximately perpendicular to the pouring channel becomes. The disadvantage of this known way of closing the pouring channel is that the molding sand tears at any point, so that a secure closure of the pouring channel does not always guarantee is.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren nach dem Oberbegriff des Anspruches 1 so auszubilden, dass definierte Sollbruchstellen für den Formsand im Inneren der Gießform gebildet werden, so dass der Steigkanal sicher und dicht verschlossen wird.The invention has for its object a method according to the preamble of claim 1 so that defined predetermined breaking points for the molding sand be formed inside the mold, so that the riser is securely and tightly closed.

Diese Aufgabe wird den Merkmalen des Anspruches 1 gelöst.This object is achieved with the features of claim 1.

Durch den in dem Formsand eingeformten, bis in die Nähe des Steigkanals reichenden Stempelkanal, der quer zu der Achse des Steigkanals orientiert ist, kann der Steigkanal sicher abgesperrt werden, weil ein definierter Formsandbereich durch den Stempel in den Steigkanal eingeschoben wird. Vorteilhaft ist in dem Stempelkanal ein Pfropfen angeordnet, der sicherstellt, dass der Stempelkanal auch nach dem Verschließen des Steigkanals verschlossen bleibt.By the molded in the molding sand, up to the vicinity of the Rising channel-extending stamp channel, which is transverse to the axis of the rising channel is oriented, the riser can be shut off safely because a defined one Shaped sand area inserted into the riser through the punch becomes. A plug is advantageously arranged in the stamp channel ensures that the stamp channel is closed even after the riser channel has been closed remains closed.

So wird durch eine quer zur Achse des Steigkanals ausgeübte, den Formsand verschiebende und/oder verdichtende Stempelkraft mindestens eines vorzugsweise hydraulisch betätigten Druckstempels der Steigkanal eingeschnürt, wodurch durch Verschieben und/oder Verdichten des Formsandes der Steigkanal geschlossen wird. Unmittelbar, nachdem die Strömung in dem Steigkanal unterbrochen ist, wird der Förderdruck auf die Oberfläche der Gießmasse abgestellt, so dass der gewünschte fortlaufende Arbeitsprozess erreicht ist, weil die Gießform nun sofort ersetzt werden kann.Thus, the molding sand is exerted by a transverse to the axis of the riser displacing and / or compressing stamping force of at least one preferably the hydraulically operated pressure stamp constricts the riser, whereby by moving and / or compacting the molding sand the riser is closed. Immediately after the flow in the Rising channel is interrupted, the discharge pressure on the surface of the Casting compound turned off, so that the desired continuous work process is reached because the mold can now be replaced immediately.

Eine besonders vorteilhafte Ausgestaltung der Erfindung erfährt das Gießverfahren, wenn die in dem Gießbehälter vorrätige Gießmasse auf ihrer Oberfläche einem pneumatischen Förderdruck ausgesetzt ist und die Gießmasse durch mindestens ein in die Gießmasse eintauchendes, senkrechtes Steigrohr und durch den mit dem Steigrohr fluchtenden und mit diesem eine gemeinsame Steigleitung für die Einströmung der Gießmasse bildenden Steigkanal in die oberhalb des Steigrohres befindliche Gießform gedrückt wird. Die gesamte Steigleitung verläuft hierbei senkrecht und ist im Bereich des Steigkanals einer in der Gießform vorgenommenen Einschnürung zugänglich.A particularly advantageous embodiment of the invention is the casting process, when the casting compound in the casting container is on your Surface is exposed to a pneumatic delivery pressure and the casting compound by at least one vertical one immersed in the casting compound Riser pipe and through the one aligned with the riser pipe and with this one common riser for the inflow of the casting compound Riser channel pressed into the mold located above the riser pipe becomes. The entire riser is vertical and is in the area of the riser of a constriction made in the mold.

Die Erfindung wird nachstehend anhand der Zeichnung an einem Ausführungsbeispiel näher erläutert. Es zeigen:

Fig. 1
einen Längsschnitt durch eine für das erfindungsgemäße Verfahren geeignete Gießanordnung mit stehend abgegossener Gießform vor dem Abguss,
Fig. 2
die Anordnung der Fig. 1 unmittelbar nach dem Abguss und dem Verschließen des Steigkanals,
Fig. 3
eine Gießanordnung wie in Fig. 1 und 2 mit einer etwas veränderten Gießform und
Fig. 4
eine Gießanordnung wie in Fig. 3 mit einem speziellen Verschlussteil für den Steigkanal der Gießform,
sämtlich in schematisch vereinfachter Darstellung.The invention is explained below with reference to the drawing using an exemplary embodiment. Show it:
Fig. 1
2 shows a longitudinal section through a casting arrangement suitable for the method according to the invention with the casting mold standing upright before the casting,
Fig. 2
1 immediately after the casting and the closing of the riser,
Fig. 3
a casting arrangement as in Figs. 1 and 2 with a slightly modified mold and
Fig. 4
3 with a special closure part for the riser of the casting mold,
all in a schematically simplified representation.

Eine Gießform 1, 2 nach der Erfindung besteht aus zwei senkrecht geteilten Formhälften 1 und 2 mit einem von Formsand umschlossenen Formhohlraum 3, in den ein mittiger, senkrecht nach unten gerichteter, in den Formsand eingeformter Steigkanal 4 mündet; der Steigkanal 4 mit einem am besten kreisförmigen Querschnitt endet andererseits an der freien Stirnseite 10 eines ebenfalls senkrecht ausgeführten Steigrohres 8, das mit dem Steigkanal 4 fluchtet und mit diesem eine für eine Gießmasse 7 durchlässige Steigleitung 4, 8 so lange bildet, wie die Gießform 1, 2 auf einen Gießbehälter 5, 6 aufgesetzt ist. Der Gießbehälter 5, 6 setzt sich aus einem Tiegel 6 und einem auf den Tiegel 6 aufgesetzten Kopfstück 5 zusammen, das den Tiegel 6 dicht verschließt und außer dem mittig angeordneten Steigrohr 8 noch einen Rohrstutzen 9 aufweist, die beide oberhalb der Oberfläche 11 der in dem Tiegel 6 befindlichen flüssigen Gießmasse 7 enden.A casting mold 1, 2 according to the invention consists of two vertically divided Mold halves 1 and 2 with a mold cavity enclosed by molding sand 3, in which a central, vertically downward, in the molding sand molded riser 4 opens; the riser 4 with one best circular cross section, on the other hand, ends at the free end face 10 of a also vertical pipe 8 with the riser 4 is aligned and with this a riser permeable to a casting compound 7 4, 8 forms as long as the casting mold 1, 2 on a casting container 5, 6 is put on. The casting container 5, 6 is composed of a crucible 6 and a put on the crucible 6 head piece 5, the crucible 6 tight closes and in addition to the centrally arranged riser 8 another Has pipe socket 9, both above the surface 11 of the in the The crucible 6 of the liquid casting compound 7 ends.

Während durch das Steigrohr 8 die Gießmasse 7 in den Formhohlraum 3 gedrückt wird, wenn die Gießform 1, 2 auf den Gießbehälter 5, 6 aufgesetzt, die Steigleitung 4, 8 ausgebildet und die Oberfläche 11 einem pneumatischen Förderdruck p ausgesetzt ist, dient der Rohrstutzen 9 zur Strömungsverbindung des Gießbehälters 5, 6 mit einer Druckluftquelle.While through the riser 8, the casting compound 7 into the mold cavity 3rd is pressed when the casting mold 1, 2 is placed on the casting container 5, 6, the riser 4, 8 formed and the surface 11 a pneumatic Delivery pressure p is exposed, the pipe socket 9 is used for flow connection the casting container 5, 6 with a compressed air source.

In Höhe des Steigkanals 4 und quer zu dessen Verlauf gerichtet ist ein hydraulischer Kolbenmotor 12 installiert, dessen Druckstempel 13 in einer auf der Achse des Steigkanals 4 senkrechten Richtung 14 in die Gießform 1, 2 verfahrbar ist und dabei einen Stempeldruck auf den darin befindlichen Formsand ausübt.At the level of the riser 4 and directed transversely to its course, there is a hydraulic one Piston engine 12 installed, the pressure stamp 13 in one the axis of the riser 4 in the vertical direction 14 into the mold 1, 2 is movable and thereby a stamp pressure on those located therein Mold sand.

Bei der Anordnung der Fig. 1 und 2 übt der Druckstempel 13 seine Stempelkraft unmittelbar auf den die Gießform 1, 2 vollständig ausfüllenden und lediglich den Formhohlraum 3 und den Steigkanal 4 freilassenden Formsand auf, wobei der Druckstempel 13 (Fig. 2) nach dem Abguss so weit in die Gießform 1, 2 eingefahren wird, bis der Steigkanal 4 durch verdichteten und in seinen Querschnitt gedrückten Formsand unterbrochen ist und so ein Rückfluss der bereits in den Formhohlraum 3 eingefüllten Gießmasse 7 verhindert wird. Es versteht sich, dass ein weiterer, dem ersten diametral entgegengerichteter Druckstempel vorgesehen sein kann, um auf der gegenüberliegenden Seite der Gießform 1, 2 den Formsand ebenfalls entsprechend zu belasten und auf diese Weise den Steigkanal 4 von zwei Seiten einschnüren zu können.1 and 2, the pressure stamp 13 exerts its stamp force directly to the mold 1, 2 completely filling and only the mold cavity 3 and the riser 4 leaving molding sand on, with the pressure stamp 13 (Fig. 2) so far into the Casting mold 1, 2 is retracted until the riser 4 is compressed and in its cross section pressed molding sand is interrupted and so Backflow of the casting compound 7 already filled into the mold cavity 3 is prevented becomes. It is understood that another, diametrically opposed to the first Stamp can be provided to be on the opposite Side of the mold 1, 2 also the molding sand accordingly load and in this way constrict the riser 4 from two sides to be able to.

Im Gegensatz dazu ist in den Ausführungen der Fig. 3 bis 6 ein Stempelkanal 15 bzw. 16 in die Gießform 1, 2 eingeformt, der in Richtung 14 und in seinem Querschnitt dem Druckstempel 13 angepasst ist und bis zu dem Steigkanal 4 (Fig. 3, 4) oder darüber hinaus (Fig. 5, 6) reicht. In contrast, in the embodiments of FIGS. 3 to 6 there is a stamp channel 15 and 16 molded into the mold 1, 2, in the direction 14 and in its cross section is adapted to the pressure stamp 13 and up to the Rise channel 4 (Fig. 3, 4) or beyond (Fig. 5, 6) is sufficient.

Während entsprechend Fig. 3 der Stempelkanal 15 allein dazu dienen kann, die Arbeit des Druckstempels 13 zu erleichtern, ist in der Anordnung der Fig. 4 ein Pfropfen 17 in einen dazu passenden Stempelkanal 16 eingelegt, der von dem Druckstempel 13 bis zum Verschluss des Steigkanals 4 verschiebbar ist. Eine solche Ausführung ist besonders dann vorteilhaft, wenn der Formsand chemisch gebunden ist und dem Druckstempel 13 entsprechend höhen Widerstand entgegensetzt, wenn dieser in den Formsand eingefahren wird. 3, the stamp channel 15 can serve only to to facilitate the work of the plunger 13 is in the arrangement of Fig. 4 a plug 17 is inserted into a matching stamping channel 16 which from the plunger 13 to the closure of the riser 4 is. Such an embodiment is particularly advantageous if the Molding sand is chemically bound and the pressure stamp 13 accordingly opposes high resistance when it is inserted into the molding sand becomes.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Formhälftemold
22
Formhälftemold
1, 21, 2
Gießformmold
33
Formhohlraummold cavity
44
Steigkanalrising channel
55
Kopfstückheadpiece
66
Tiegelcrucible
5, 65, 6
Gießbehältergooseneck
77
Gießmassecasting
88th
Steigrohrriser
4, 84, 8
Steigleitungriser
99
Rohrstutzenpipe socket
1010
Stirnseitefront
1111
Oberflächesurface
1212
Kolbenmotorpiston engine
1313
Druckstempelplunger
1414
Richtungdirection
1515
Stempelkanalplunger passage
1616
Stempelkanalplunger passage
1717
PfropfenGraft

Claims (6)

  1. A process for casting a casting mass (7) in a casting mould (1, 2) having a moulding box, said casting mass coming from a casting container (5, 6) and being introduced into the casting mould from below in a rising casting procedure by way of a feed channel (4) which is integrally formed in the moulding sand of the casting mould (1, 2) to enable the casting mass (7) entering the casting mould (1, 2) from below in a rising manner to flow in, the feed channel (4) being interrupted in the region of the moulding sand immediately after the casting mould (1, 2) has been filled, and therefore being closed such that the casting mould (1, 2) may be separated from the casting container (5, 6),
    characterised in that
    an outwardly open die channel (15) is integrally formed in the moulding sand of the casting mould (1, 2), the die channel (15) extends into the vicinity of the feed channel (4) and is oriented transversely with respect to the axis of the feed channel, and the feed channel (4) is closed as a result of displacing the moulding sand therein by means of a pressure piston (13).
  2. A process according to Claim 1, characterised in that the casting mass (7) available in the casting container (5, 6) has a pneumatic delivery pressure (p) applied to its surface (11), and the casting mass (7) is pressed into the casting mould (1, 2) by means of at least one vertical feed tube (8), above which the casting mould (1, 2) is located and which is immersed in the casting mass (7), and by means of the feed channel (4), which is in alignment with the feed tube (8) and forms a common feed line (4, 8) therewith to enable the casting mass (7) to flow in.
  3. A process according to Claim 1 or 2, characterised in that the delivery pressure (p) on the surface (11) of the casting mass (7) is removed immediately after the flow in the feed channel (4) has been interrupted.
  4. A casting mould for carrying out a process according to one of Claims 1 to 3, having a moulding box and a casting cavity which is integrally formed in moulding sand therein for the purpose of receiving the casting mass, characterised in that an outwardly open die channel (15) is integrally formed in the moulding sand of the casting mould, said die channel extending into the vicinity of the feed channel (4) and being oriented transversely with respect to the axis of the feed channel (4).
  5. A casting mould according to Claim 4, characterised in that a plug (17) is provided in the die channel (16), which plug may be pressed into the feed channel (4) and blocks this latter.
  6. A casting mould according to one of Claims 4 or 5, characterised in that the feed channel (4) is arranged parallel to the plane of the moulding.
EP98104851A 1997-08-01 1998-03-18 Process for shape casting and mould therefore Expired - Lifetime EP0894557B2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19733485 1997-08-01
DE19733485A DE19733485A1 (en) 1997-08-01 1997-08-01 Mold casting method and mold for such a method
CZ19984016A CZ9804016A3 (en) 1997-08-01 1998-12-07 Mold casting process and casting mold for making the same
US09/217,709 US6305460B1 (en) 1997-08-01 1998-12-21 Method for casting
JP10374685A JP2000197960A (en) 1997-08-01 1998-12-28 Casting method and mold for this method

Publications (3)

Publication Number Publication Date
EP0894557A1 EP0894557A1 (en) 1999-02-03
EP0894557B1 true EP0894557B1 (en) 2002-04-24
EP0894557B2 EP0894557B2 (en) 2006-09-06

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EP98104851A Expired - Lifetime EP0894557B2 (en) 1997-08-01 1998-03-18 Process for shape casting and mould therefore

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US (1) US6305460B1 (en)
EP (1) EP0894557B2 (en)
JP (1) JP2000197960A (en)
AT (1) ATE216642T1 (en)
CZ (1) CZ9804016A3 (en)
DE (2) DE19733485A1 (en)
ES (1) ES2173522T5 (en)
PL (1) PL327479A1 (en)

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BR0012465B1 (en) * 1999-07-02 2009-01-13 casting process and apparatus.
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DK1243360T3 (en) 1999-10-15 2003-10-20 Loramendi Sa Process for casting metal in green sand molds and blocking device for the inlet
DE19953402A1 (en) * 1999-11-06 2001-05-10 Wagner Heinrich Sinto Masch Method and device for producing and casting a casting mold consisting of two mold halves
DE102009039595B4 (en) * 2009-09-01 2020-10-15 Daimler Ag Low pressure casting device
CN102211166A (en) * 2010-04-02 2011-10-12 中煤张家口煤矿机械有限责任公司 Molding process for casting aluminum casting by using sand mold under low pressure
CN114210932B (en) * 2022-02-21 2022-04-22 龙口市和义机械配件有限公司 Pouring channel optimization structure and method for accelerating flow velocity of molten iron

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Publication number Publication date
CZ9804016A3 (en) 2001-08-15
ES2173522T3 (en) 2002-10-16
DE19733485A1 (en) 1999-02-04
DE59803900D1 (en) 2002-05-29
JP2000197960A (en) 2000-07-18
ATE216642T1 (en) 2002-05-15
PL327479A1 (en) 1999-02-15
US6305460B1 (en) 2001-10-23
ES2173522T5 (en) 2007-05-01
EP0894557B2 (en) 2006-09-06
EP0894557A1 (en) 1999-02-03

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