EP0128974A1 - Moulding machine for producing moulds or cores from moulding sand - Google Patents

Moulding machine for producing moulds or cores from moulding sand Download PDF

Info

Publication number
EP0128974A1
EP0128974A1 EP83200879A EP83200879A EP0128974A1 EP 0128974 A1 EP0128974 A1 EP 0128974A1 EP 83200879 A EP83200879 A EP 83200879A EP 83200879 A EP83200879 A EP 83200879A EP 0128974 A1 EP0128974 A1 EP 0128974A1
Authority
EP
European Patent Office
Prior art keywords
core box
slot nozzles
mold
molding machine
sand
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
EP83200879A
Other languages
German (de)
French (fr)
Other versions
EP0128974B1 (en
Inventor
Erhard Prof. Dipl.-Ing. Jaeger
Heinrich Ing. Grad. Brinkmann
Harald Steffens
Uwe Ing. Grad. Steffens
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.)
Harald Steffens Giessereimaschinen
Original Assignee
Harald Steffens Giessereimaschinen
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 Harald Steffens Giessereimaschinen filed Critical Harald Steffens Giessereimaschinen
Priority to DE8383200879T priority Critical patent/DE3366853D1/en
Priority to AT83200879T priority patent/ATE22825T1/en
Priority to EP83200879A priority patent/EP0128974B1/en
Publication of EP0128974A1 publication Critical patent/EP0128974A1/en
Application granted granted Critical
Publication of EP0128974B1 publication Critical patent/EP0128974B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • B22C9/123—Gas-hardening

Definitions

  • the invention relates to a molding machine for producing casting molds or cores from molding sand, which consists of a mold or core box provided with a base plate and a head plate and slot nozzles, clamping jaws acting laterally on the mold or core box, and a mold or core box against a sand filling device pressing lifting table, the sand filling device being equipped with a shooting head or a fluidizing head and a gassing plate which can be pushed over the mold or core box and which can be connected via valves to a carrier source or to purging air.
  • the molding sand is introduced and compressed in the molding or core box with a very high air or gas pressure, the slot nozzles arranged in the box frame, the base plate and the top plate depending on the shape of the model of the ventilation during the Compression process and the removal of the gases formed during the hardening of the binder added to the molding sand and the purge air.
  • the gases emerging from the slot nozzles are often harmful to health and must therefore be extracted and rendered harmless by means of large interception hoods covering the molding machine.
  • suction devices of this type have the disadvantage that usually not all harmful gases are suctioned off and removed. They are also very space consuming and expensive to maintain.
  • Another disadvantage is that the one-sided application of compressed sand to the molding sand requires long processing times during compression and curing.
  • the invention has for its object to design a molding machine of the generic type in such a way that the escape of harmful exhaust gases into the open is excluded with simple means and the work process of compression and curing is shortened.
  • the processing times and work cycles for producing a mold or a core are considerably shorter than in the known molding machines which only work with excess pressure.
  • the filling and compression of the molding sand can be carried out either only by vacuum or in conjunction with the usual compressed gas, so that a much larger pressure difference is formed.
  • the effect of the vacuum has the advantage that the reaction is accelerated and less binders and catalyst substances are required. The reason for this is a more uniform gas flow through the molding or core mass.
  • the vacuum device With the help of the vacuum device, there is also the possibility for complete disposal of the harmful gas components in the sealed off from the outside Separate system for example by absorption.
  • This can be done in that the individual suction lines connected to the slot nozzles open into a collecting tube which is connected to a vacuum container on the one hand via the suction line and the associated valve and on the other hand via a parallel suction line equipped with a control valve and an absorption apparatus.
  • the vacuum can be applied directly to the slot nozzles, whereas the gases extracted during curing are passed through an absorption device for the purpose of separating harmless components.
  • a hollow slide is arranged under the base plate equipped with slot nozzles, the cavity of which is connected to the slot nozzles and the collecting tube, and the lateral clamping jaws have a cavity which is connected to the slot nozzles and the collecting tube on the relevant side .
  • the molding machine shown in FIGS. 1 to 3 is assigned a molding or core box 1, which is generally in two parts and whose cavity 2 corresponds to the contours of the mold or core to be produced. Depending on the design of the cavity 2, both halves are provided with slot nozzles 3, which are each connected to a common outlet opening via small bores.
  • the molded or core box 1 rests on a base plate 4 equipped with slot nozzles 5 and is covered by a top plate 12 provided with slot nozzles 13 and a central filling opening.
  • the base plate 4 rests on a hollow slide 6, the cavity of which is connected to the slot nozzles 5 of the base plate 4 via small bores.
  • the hollow slide 6 is connected via a suction line to a collecting pipe 23, the meaning of which is described in more detail below.
  • the hollow slide 6 is supported on a lifting table 7 which can be raised and lowered by means of a lifting cylinder. Furthermore, lateral clamping jaws 8 are provided, which can be pressed against the two halves of the mold or core box 1 by means of an adjusting cylinder 9.
  • the clamping jaws 8, like the hollow slide 6, are hollow, the cavity being connected via a bore to the outlet opening assigned to the slot nozzles 3 and also connected to the collecting tube 23. In a similar manner, the slot nozzles 13 of the head plate 12 are also connected to the collecting pipe 23 via channels.
  • FIGS. 1 to 3 The embodiment shown in FIGS. 1 to 3 is suitable for processing plastic molding sand.
  • a sand filling device 10 with a shooting head 11 is arranged on an upper machine part, which has a common filling opening with the head plate 12.
  • a shooting cylinder 14 Above the shooting head 11 there is a shooting cylinder 14 provided with slots, which is surrounded by a jacket 18 at a distance.
  • Above the jacket 18 there is the reservoir 15 for the molding sand and a sand slide 16 actuated by an actuating cylinder 17.
  • a valve seat 19 is also incorporated into the jacket 18, to which a shooting valve 20 is assigned, which is acted upon by a compressed air pump 22 via a pressure line 21 becomes.
  • the collecting tube 23 connected to the slit nozzles 3, 5 and 13 is connected via a suction line 24 provided with a valve 25 to a vacuum container 26 which is kept at a pressure of approximately 0.95 bar by a vacuum pump 27.
  • a suction line 28 equipped with a check valve 29 is provided, which is connected via an absorption apparatus 30, e.g. B. a washing machine, a suction line 31 and a control valve 32 is also connected to the vacuum container 26.
  • the contact surfaces of the clamping jaws 8 are provided with sealing rings 33, 34.
  • the inner sealing ring 33 seals the vacuum line between the outlet bores of the slot nozzles 3 and the cavity of the clamping jaws 8.
  • the above-mentioned components have the position shown in FIG. 1 for filling and compacting the plastic molding sand.
  • the valve 20 controlling the compressed air and the valve 25 assigned to the vacuum device are opened briefly, depending on the mold or core geometry, with the formation of a large pressure difference.
  • the valves 20, 25 are preferably linked in terms of control technology in such a way that they can be opened selectively and variably at the same time or independently of one another or overlapping in time.
  • the molding machine After compaction, which takes about 0.5 to several seconds, depending on the shape or core design and the type of molding sand, the molding machine is prepared for the curing process.
  • the lifting table 7 is lowered and a gassing plate 35, for example slidably mounted on guide rails 36, is pushed between the molded or core box 1 and its head plate 12; then the lifting table 7 is pushed up again (cf. FIG. 3).
  • the gassing plate 35 has a gassing channel 37 which is connected to a gassing line 38.
  • the gassing line 38 is divided and connected on the one hand via a valve 40 to a carrier gas source and on the other hand via a valve 39 to a purge air line.
  • a line equipped with a valve 42 for introducing catalyst gas is also provided on the branch assigned to the carrier.
  • the gas passed through the gas supply line 38 can be heated if necessary with a heating device 43.
  • the binder contained in the molding sand is cured with only a small pressure difference, the vacuum on the vacuum side being able to be adjusted by means of the control valve 32 depending on the shape or core geometry and density.
  • the choice of the carrier gas and the catalyst gas depends on the type of binder added to the molding sand. If the binder consists of water glass, for example, CO z is used as the carrier gas. If, on the other hand, they are polymerizable synthetic resins, N 2 can be provided as the carrier gas, to which a suitable catalyst gas is added as a hardener.
  • Suitable polymerizable organic synthetic resins for molding sands are phenolic resins, isocyanates and furan resins. If thermally curable synthetic resins are to be used, the molding or core box 1 and the associated top and bottom plates 4, 12 are provided with heating devices (not shown). During the curing process and the subsequent ventilation process, in which the valve 40 is closed and the valve 39 is open, the exhaust gases are passed through the absorption apparatus 30, in which harmful constituents can be separated off.
  • the molding machine is equipped with the sand filling device 44 shown in FIG. 4 instead of the sand filling device 10 shown in FIG. 1.
  • a fluidizing head 46 and a sand slide 47 are arranged at the lower end of the storage container 45.
  • the flowable molding sand is compressed by simultaneously opening the valve 25 associated with the vacuum device and a compressed air valve 48 assigned to the fluidizing head 46.
  • a vibrator 49 mounted on the lifting table 7 can be actuated if necessary be (see Fig. 1).
  • the procedure for curing is the same as that explained in connection with FIGS. 1 to 3.
  • the individual operations of the molding machine are controlled logically. Depending on the molding or core mass and the type of binder, a work cycle usually lasts 1 to several minutes.

Landscapes

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

Abstract

1. A moulding machine for producing casting moulds or casting cores from moulding sand by vacuum injection, the machine comprising : a moulding box or core box (1) having a baseplate (4) and a top plate (12) and formed with slit-like nozzles (3, 5, 13) ; clamping jaws (8) engaging the moulding or core box (1) laterally ; and a lifting table (7) pressing the moulding or core box (1) into engagement with a sand filler (10 or 44), the sand filler (10 or 44) having an injection head (11) or a fluidizing head (46) and a gassing plate (35), the latter being adapted to be pushed over the moulding or core box (1), the plate (35) being connectable by way of valves (39, 40) to a supply of carrier gas or to scavenging air, the slit-like nozzles (3, 5, 13) being connected by way of a suction line (24) to a vacuum device, characterised in that individual auxiliary suction lines connected to the slit-like nozzles (3, 5, 13) extend to a tubular main (23) connected, by way of the suction line (24) and of an associated valve (25) and also by way of a parallel auxiliary suction line (28, 31) having a control valve (32) and an absorber (30), to a vacuum tank (26).

Description

Die Erfindung betrifft eine Formmaschine zum Herstellen von Gießformen oder -kernen aus Formsand, welche aus einem mit einer Bodenplatte und einer Kopfplatte sowie Schlitzdüsen versehenen Form- oder Kernkasten, seitlich am Form- oder Kernkasten angreifenden Spannbacken und einen den Form- oder Kernkasten gegen eine Sandfülleinrichtung drückenden Hubtisch besteht, wobei die Sandfülleinrichtung mit einem Schießkopf oder einem Fluidisierungskopf und einer über den Form- oder Kernkasten schiebbaren Begasungsplatte ausgerüstet ist, welche über Ventile an eine Trägerquelle oder an Spülluft anschließbar ist.The invention relates to a molding machine for producing casting molds or cores from molding sand, which consists of a mold or core box provided with a base plate and a head plate and slot nozzles, clamping jaws acting laterally on the mold or core box, and a mold or core box against a sand filling device pressing lifting table, the sand filling device being equipped with a shooting head or a fluidizing head and a gassing plate which can be pushed over the mold or core box and which can be connected via valves to a carrier source or to purging air.

Bei den bekannten Formmaschinen dieser Art wird der Formsand mit einem sehr hohen Luft- oder Gasdruck in den Form- oder Kernkasten eingebracht und verdichtet, wobei die in Abhängigkeit von der Gestalt des Modells im Kastenrahmen, der Bodenplatte und der Kopfplatte angeordneten Schlitzdüsen der Entlüftung während des Verdichtungsvorganges und der Abführung der bei der Aushärtung des dem Formsand beigemischten Bindemittels entstehenden Gase sowie der Spülluft dienen. Die aus den Schlitzdüsen austretenden Gase sind häufig gesundheitsschädlich und müssen deshalb mittels großer, die Formmaschine abdekkender Abfanghauben abgesaugt und unschädlich gemacht werden. Absaugeinrichtungen dieser Art haben jedoch den Nachteil, daß meist nicht alle Schadgase abgesaugt und entfernt werden. Außerdem sind sie sehr platzraubend und im Unterhalt teuer. Nachteilig ist auch, daß die einseitige Beaufschlagung des Formsandes mit Druckgas beim Verdichten und Aushärten lange Verarbeitungszeiten verlangt.In the known molding machines of this type, the molding sand is introduced and compressed in the molding or core box with a very high air or gas pressure, the slot nozzles arranged in the box frame, the base plate and the top plate depending on the shape of the model of the ventilation during the Compression process and the removal of the gases formed during the hardening of the binder added to the molding sand and the purge air. The gases emerging from the slot nozzles are often harmful to health and must therefore be extracted and rendered harmless by means of large interception hoods covering the molding machine. However, suction devices of this type have the disadvantage that usually not all harmful gases are suctioned off and removed. They are also very space consuming and expensive to maintain. Another disadvantage is that the one-sided application of compressed sand to the molding sand requires long processing times during compression and curing.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, eine Formmaschine der gattungsgemäßen Art derart auszubilden, daß mit einfachen Mitteln der Austritt schädlicher Abgase ins Freie ausgeschlossen und der Arbeitsprozeß des Verdichtens und der Aushärtung verkürzt wird.In contrast, the invention has for its object to design a molding machine of the generic type in such a way that the escape of harmful exhaust gases into the open is excluded with simple means and the work process of compression and curing is shortened.

Diese Aufgabe wird erfindungsgemäß durch eine Vakuumeinrichtung gelöst, mit der die Schlitzdüsen des Form-oder Kernkastens durch eine mit einem Ventil ausgerüstete Saugleitung verbunden sind.This object is achieved according to the invention by a vacuum device with which the slot nozzles of the mold or core box are connected by a suction line equipped with a valve.

Durch diese Ausbildung wird eine wesentlich bessere Entgasung erreicht, da die Abgase überhaupt nicht mehr ins Freie treten können, sondern in einem geschlossenen System abgeführt werden. Außerdem sind die Verarbeitungszeiten und Arbeitszyklen zur Herstellung einer Form bzw. eines Kerns wesentlich kürzer als bei den bekannten, nur mit Überdruck arbeitenden Formmaschinen. Je nach den Betriebsbedingungen, insbesondere der Art und Beschaffenheit des Formsandes, kann das Einfüllen und Verdichten des Formsandes entweder nur durch Vakuum oder in Verbindung mit dem üblichen Druckgas erfolgen, so daß eine wesentlich größere Druckdifferenz gebildet wird. Für den Härteprozeß hat die Einwirkung des Vakuums den Vorteil, daß die Reaktion beschleunigt wird und weniger Bindemittel und Katalysatorstoffe benötigt werden. Ursächlich hierfür ist eine gleichmäßigere Gasdurchströmung durch die Form- bzw. Kernmasse.With this design, a significantly better degassing is achieved, since the exhaust gases can no longer escape into the open, but are discharged in a closed system. In addition, the processing times and work cycles for producing a mold or a core are considerably shorter than in the known molding machines which only work with excess pressure. Depending on the operating conditions, in particular the type and nature of the molding sand, the filling and compression of the molding sand can be carried out either only by vacuum or in conjunction with the usual compressed gas, so that a much larger pressure difference is formed. For the hardening process, the effect of the vacuum has the advantage that the reaction is accelerated and less binders and catalyst substances are required. The reason for this is a more uniform gas flow through the molding or core mass.

Mit Hilfe der Vakuumeinrichtung besteht für eine vollständige Entsorgung auch die Möglichkeit, die schädlichen Gasbestandteile in dem nach außen abgeschlossenen System beispielsweise durch Absorption abzutrennen. Dies kann dadurch geschehen, daß die einzelnen an die Schlitzdüsen angeschlossenen Saugleitungen in ein Sammelrohr münden, welches einerseits über die Saugleitung und das zugehörige Ventil und anderseits über eine parallele, mit einem Steuerventil und einem Absorptionsapparat ausgerüstete Saugleitung mit einem Vakuumbehälter verbunden ist. Während des Füll- und Verdichtungsvorganges läßt sich das Vakuum unmittelbar an die Schlitzdüsen anlegen, wohingegen die beim Aushärten abgesaugten Gase zwecks Abscheidung unschädlicher Bestandteile durch einen Absorptionsapparat geführt werden.With the help of the vacuum device, there is also the possibility for complete disposal of the harmful gas components in the sealed off from the outside Separate system for example by absorption. This can be done in that the individual suction lines connected to the slot nozzles open into a collecting tube which is connected to a vacuum container on the one hand via the suction line and the associated valve and on the other hand via a parallel suction line equipped with a control valve and an absorption apparatus. During the filling and compression process, the vacuum can be applied directly to the slot nozzles, whereas the gases extracted during curing are passed through an absorption device for the purpose of separating harmless components.

Für den Anschluß der Vakuumeinrichtung an die Schlitzdüsen des Form- oder Kernkastens sowie der Boden- und Kopfplatte sind verschiedene Einrichtungen möglich. Bei einer bevorzugten Ausführung ist unter der mit Schlitzdüsen ausgerüsteten Bodenplatte ein Hohlschieber angeordnet, dessen Hohlraum mit den Schlitzdüsen und dem Sammelrohr verbunden ist, und die seitlichen Spannbacken weisen einen Hohlraum auf, der mit den auf der betreffenden Seite vorhandenen Schlitzdüsen und dem Sammelrohr in Verbindung steht.Various devices are possible for connecting the vacuum device to the slot nozzles of the molded or core box and the base and top plate. In a preferred embodiment, a hollow slide is arranged under the base plate equipped with slot nozzles, the cavity of which is connected to the slot nozzles and the collecting tube, and the lateral clamping jaws have a cavity which is connected to the slot nozzles and the collecting tube on the relevant side .

Um eine dichte Verbindung zwischen den Schlitzdüsen des Form- oder Kernkastens und den Spannbacken zu erzielen, sind diese auf ihren Anlageflächen mit Dichtungsringen versehen, die außerdem beim Zurückfahren ihrer Stellzylinder mit einer saugnapfartigen Wirkung dem seitlichen Abziehen und Positionieren der Kastenhälften dienen.In order to achieve a tight connection between the slot nozzles of the form or core box and the clamping jaws, they are provided with sealing rings on their contact surfaces, which also serve to pull off and position the box halves laterally when their actuating cylinders are retracted with a suction cup-like effect.

Die Erfindung ist in der Zeichnung beispielsweise dargestellt; es zeigt:

  • Fig. 1 eine Formmaschine, teilweise geschnitten, mit einer Vakuumeinrichtung,
  • Fig. 2 den Form- oder Kernkasten aus der Fig. 1 in einem größeren Maßstab,
  • Fig. 3 den Gegenstand der Fig. 1 in einem anderen Betriebszustand und
  • Fig. 4 eine andere Sandfülleinrichtung für die in Fig. 1 dargestellte Formmaschine.
The invention is shown in the drawing, for example; it shows:
  • 1 is a molding machine, partially in section, with a vacuum device,
  • 2 shows the molded or core box from FIG. 1 on a larger scale,
  • Fig. 3 shows the subject of Fig. 1 in a different operating condition and
  • Fig. 4 shows another sand filling device for the molding machine shown in Fig. 1.

Der in den Fig. 1 bis 3 dargestellten Formmaschine ist ein in der Regel zweiteilig ausgebildeter Form- oder Kernkasten 1 zugeordnet, dessen Hohlraum 2 den Konturen der herzustellenden Form bzw. des herzustellenden Kerns entspricht. In Abhängigkeit von der Gestaltung des Hohlraums 2 sind beide Hälften mit Schlitzdüsen 3 versehen, die über kleine Bohrungen jeweils an eine gemeinsame Austrittsöffnung angeschlossen sind. Der Form- oder Kernkasten 1 liegt auf einer mit Schlitzdüsen 5 ausgestatteten Bodenplatte 4 auf und ist durch eine mit Schlitzdüsen 13 und einer zentrischen Füllöffnung versehenen Kopfplatte 12 abgedeckt. Die Bodenplatte 4 liegt auf einem Hohlschieber 6 auf, dessen Hohlraum über kleine Bohrungen mit den Schlitzdüsen 5 der Bodenplatte 4 in Verbindung steht. Der Hohlschieber 6 ist über eine Saugleitung an ein Sammelrohr 23angeschlossen, dessen Bedeutung weiter unten näher beschrieben ist. Der Hohlschieber 6 lagert auf einem Hubtisch 7, der mittels eines Hubzylinders heb- und senkbar ist. Weiterhin sind seitliche Spannbacken 8 vorgesehen, die mittels je eines Stellzylinders 9 gegen die beiden Hälften des Form- oder Kernkastens 1 andrückbar sind. Die Spannbacken 8 sind, wie der Hohlschieber 6, hohl ausgebildet, wobei der Hohlraum über eine Bohrung mit der den Schlitzdüsen 3 zugeordneten Austrittsöffnung in Verbindung steht und ebenfalls an das Sammelrohr 23 angeschlossen ist. In ähnlicher Weise sind auch die Schlitzdüsen 13 der Kopfplatte 12 über Kanäle an das Sammelrohr 23 angeschlossen.The molding machine shown in FIGS. 1 to 3 is assigned a molding or core box 1, which is generally in two parts and whose cavity 2 corresponds to the contours of the mold or core to be produced. Depending on the design of the cavity 2, both halves are provided with slot nozzles 3, which are each connected to a common outlet opening via small bores. The molded or core box 1 rests on a base plate 4 equipped with slot nozzles 5 and is covered by a top plate 12 provided with slot nozzles 13 and a central filling opening. The base plate 4 rests on a hollow slide 6, the cavity of which is connected to the slot nozzles 5 of the base plate 4 via small bores. The hollow slide 6 is connected via a suction line to a collecting pipe 23, the meaning of which is described in more detail below. The hollow slide 6 is supported on a lifting table 7 which can be raised and lowered by means of a lifting cylinder. Furthermore, lateral clamping jaws 8 are provided, which can be pressed against the two halves of the mold or core box 1 by means of an adjusting cylinder 9. The clamping jaws 8, like the hollow slide 6, are hollow, the cavity being connected via a bore to the outlet opening assigned to the slot nozzles 3 and also connected to the collecting tube 23. In a similar manner, the slot nozzles 13 of the head plate 12 are also connected to the collecting pipe 23 via channels.

Die in den Fig. 1 bis 3 dargestellte Ausführungsform ist zur Verarbeitung plastischer Formsande geeignet. Hierfür ist an einem oberen Maschinenteil eine Sandfülleinrichtung 10 mit einem Schießkopf 11 angeordnet, der mit der Kopfplatte 12 eine gemeinsame Füllöffnung aufweist. Oberhalb des Schießkopfes 11 befindet sich ein mit Schlitzen versehener Schießzylinder 14, der mit.Abstand von einem Mantel 18 umgeben ist. Über dem Mantel 18 befindet sich der Vorratsbehälter 15 für den Formsand und ein von einem Stellzylinder 17 betätigter Sandschieber 16. In den Mantel 18 ist weiterhin ein Ventilsitz 19 eingearbeitet, dem ein Schießventil 20 zugeordnet ist, das über eine Druckleitung 21 von einer Druckluftpumpe 22 beaufschlagt wird.The embodiment shown in FIGS. 1 to 3 is suitable for processing plastic molding sand. For this purpose, a sand filling device 10 with a shooting head 11 is arranged on an upper machine part, which has a common filling opening with the head plate 12. Above the shooting head 11 there is a shooting cylinder 14 provided with slots, which is surrounded by a jacket 18 at a distance. Above the jacket 18 there is the reservoir 15 for the molding sand and a sand slide 16 actuated by an actuating cylinder 17. A valve seat 19 is also incorporated into the jacket 18, to which a shooting valve 20 is assigned, which is acted upon by a compressed air pump 22 via a pressure line 21 becomes.

Das mit den Schlitzdüsen 3,5 und 13 verbundene Sammelrohr 23 ist über eine mit einem Ventil 25 versehene Saugleitung 24 an einen Vakuumbehälter 26 angeschlossen, der von einer Vakuumpumpe 27 auf einen Druck von etwa 0,95 bar gehalten wird. Parallel zu der Saugleitung 24 ist eine mit einem Rückschlagventil 29 ausgestattete Saugleitung 28 vorgesehen, die über einen Absorptionsapparat 30, z. B. einem Waschapparat, eine Saugleitung 31 und ein Steuerventil 32 ebenfalls an den Vakuumbehälter 26 angeschlossen ist.The collecting tube 23 connected to the slit nozzles 3, 5 and 13 is connected via a suction line 24 provided with a valve 25 to a vacuum container 26 which is kept at a pressure of approximately 0.95 bar by a vacuum pump 27. In parallel to the suction line 24, a suction line 28 equipped with a check valve 29 is provided, which is connected via an absorption apparatus 30, e.g. B. a washing machine, a suction line 31 and a control valve 32 is also connected to the vacuum container 26.

Wie insbesondere Fig. 2 erkennen läßt, sind die Anlageflächen der Spannbacken 8 mit Dichtungsringen 33,34 versehen. Der innere Dichtungsring 33 bewirkt eine Abdichtung der Vakuumleitung zwischen den Ausgangsbohrungen der Schlitzdüsen 3 und dem Hohlraum der Spannbacken 8. Durch das Andrücken der Spannbacken 8 an den Form- bzw. Kernkasten 1 entfalten die Dichtungsringe 33 und 34 jeder Spannbacke 8 eine saugnapfartige Verbindung zu dem Form- bzw. Kernkasten 1 und ermöglicht eine Positionierung und ein Auseinanderziehen der beiden Kastenhälften mit Hilfe der Stellzylinder 9 .As can be seen in particular in FIG. 2, the contact surfaces of the clamping jaws 8 are provided with sealing rings 33, 34. The inner sealing ring 33 seals the vacuum line between the outlet bores of the slot nozzles 3 and the cavity of the clamping jaws 8. By pressing the clamping jaws 8 against the mold or core box 1, the sealing rings 33 and 34 of each clamping jaw 8 develop a suction cup-like connection to the Form or core box 1 and enables positioning and pulling apart of the two box halves with the aid of the actuating cylinder 9.

Zum Füllen und Verdichten des plastischen Formsandes haben die vorgenannten Bauteile die in Fig. 1 gezeigte Lage. Nach dem Anpressen des Hubtisches 7 gegen die Bodenplatte 4 des Form- oder Kernkastens 1 wird das die Druckluft steuernde Ventil 20 und das der Vakuumeinrichtung zugeordnete Ventil 25 in Abhängigkeit von der Form- bzw. Kerngeometrie unter Bildung einer großen Druckdifferenz kurzzeitig geöffnet. Die Ventile 20,25 sind vorzugsweise steuerungstechnisch derart verknüpft, daß sie wahlweise und variabel gleichzeitig oder unabhängig voneinander oder zeitlich überlappend geöffnet werden können. Beispielsweise kann es in Abhängigkeit von der Art des Formsandes zweckmäßig sein, zunächst durch Einleiten von Druckluft einen Vordruck zu erzeugen und anschließend das Vakuum anzuschließen; bei anderen plastischen Formsanden kann eine umgekehrte Arbeitsweise oder eine gleichzeitige Druckluft- und Vakuumeinwirkung vorteilhaft sein.The above-mentioned components have the position shown in FIG. 1 for filling and compacting the plastic molding sand. After pressing the lifting table 7 against the base plate 4 of the mold or core box 1, the valve 20 controlling the compressed air and the valve 25 assigned to the vacuum device are opened briefly, depending on the mold or core geometry, with the formation of a large pressure difference. The valves 20, 25 are preferably linked in terms of control technology in such a way that they can be opened selectively and variably at the same time or independently of one another or overlapping in time. For example, depending on the type of molding sand, it may be useful to first generate a pre-pressure by introducing compressed air and then to connect the vacuum; With other plastic molding sands, a reverse procedure or simultaneous exposure to compressed air and vacuum can be advantageous.

Nach der Verdichtung, für die in Abhängigkeit von der Form- oder Kerngestaltung und der Art des Formsandes etwa 0,5 bis mehrere Sekunden benötigt werden, wird die Formmaschine für den Aushärtungsprozeß vorbereitet. Hierfür wird der Hubtisch 7 abgesenkt und eine Begasungsplatte 35, d e beispielsweise an Führungsschienen 36 verschiebbar gelagert ist, zwischen den Form- oder Kernkasten 1 und dessen Kopfplatte 12 geschoben; anschließend wird der Hubtisch 7 wieder nach oben gedrückt (vgl. Fig. 3). Die Begasungsplatte 35 hat einen Begasungskanal 37, der an eine Begasungsleitung 38 angeschlossen ist. Die Begasungsleitung 38 ist geteilt und einerseits über ein Ventil 40 an eine Trägergasquelle und anderseits über ein Ventil 39 aneine Spülluftleitung angeschlossen. An dem dem Träger zugeordneten Zweig ist außerdem noch eine mit einem Ventil 42 ausgerüstete Leitung zum Einleiten von Katalysatorgas vorgesehen. Das durch die Begasungsleitung 38 geführte Gas läßt sich bedarfsweise mit einer Heizeinrichtung 43 aufheizen.After compaction, which takes about 0.5 to several seconds, depending on the shape or core design and the type of molding sand, the molding machine is prepared for the curing process. For this purpose, the lifting table 7 is lowered and a gassing plate 35, for example slidably mounted on guide rails 36, is pushed between the molded or core box 1 and its head plate 12; then the lifting table 7 is pushed up again (cf. FIG. 3). The gassing plate 35 has a gassing channel 37 which is connected to a gassing line 38. The gassing line 38 is divided and connected on the one hand via a valve 40 to a carrier gas source and on the other hand via a valve 39 to a purge air line. A line equipped with a valve 42 for introducing catalyst gas is also provided on the branch assigned to the carrier. The gas passed through the gas supply line 38 can be heated if necessary with a heating device 43.

Nach der Vorbereitung der Formmdschine für den Aushärtungsprozeß werden das der Vakuumeinrichtung zugeordnete Steuerventil 32 und das der Trägergasquelle zugehörige Ventil 40 gleichzeitig geöffnet. Die Aushärtung des im Formsand enthaltenen Bindemittels geschieht bei einer nur kleinen Druckdifferenz, wobei der Unterdruck auf der Unterdruckseite mittels des Steuerventils 32 in Abhängigkeit von der Form- oder Kerngeometrie und Dichte eingestellt werden kann. Die Wahl des Trägergases und des Katalysatorgases hängt von der Art des dem Formsand beigemischten Bindemittels ab. Besteht das Bindemittel beispielsweise aus Wasserglas, wird COz als Trägergas benutzt. Handelt es sich hingegen um polymerisierbare Kunstharze, kann N2 als Trägergas vorgesehen sein, dem ein geeignetes Katalysatorgas als Härter beigemischt wird. Als polymerisierbare organische Kunstharze für Formsande sind beispielsweise Phenolharze, Isocyanate, Furanharze geeignet. Sollen thermisch aushärtbare Kunstharze verwendet werden, sind der Form- oder Kernkasten 1 und die zugehörigen Kopf- und Bodenplatten 4,12 mit Heizeinrichtungen (nicht dargestellt) versehen. Während des Aushärtungsvorganges und des anschließenden Belüftungsvorganges, bei dem das Ventil 40 geschlossen und das Ventil 39 geöffnet ist, werden die Abgase durch den Absorptionsapparat 30 geleitet, in dem schädliche Bestandteile abgetrennt werden können.After preparing the d Formm machine for the curing process that is associated with the vacuum means 32 and the control valve associated with the carrier gas source valve 40 are opened simultaneously. The binder contained in the molding sand is cured with only a small pressure difference, the vacuum on the vacuum side being able to be adjusted by means of the control valve 32 depending on the shape or core geometry and density. The choice of the carrier gas and the catalyst gas depends on the type of binder added to the molding sand. If the binder consists of water glass, for example, CO z is used as the carrier gas. If, on the other hand, they are polymerizable synthetic resins, N 2 can be provided as the carrier gas, to which a suitable catalyst gas is added as a hardener. Examples of suitable polymerizable organic synthetic resins for molding sands are phenolic resins, isocyanates and furan resins. If thermally curable synthetic resins are to be used, the molding or core box 1 and the associated top and bottom plates 4, 12 are provided with heating devices (not shown). During the curing process and the subsequent ventilation process, in which the valve 40 is closed and the valve 39 is open, the exhaust gases are passed through the absorption apparatus 30, in which harmful constituents can be separated off.

Für fließfähige Formsande ist die Formmaschine anstelle der in Fig. 1 dargestellten Sandfülleinrichtung 10 mit der in Fig. 4 gezeigten Sandfülleinrichtung 44 ausgerüstet. Am unteren Ende des Vorratsbehälters 45 ist ein Fluidisierungskopf 46 und ein Sandschieber 47 angeordnet. Die Verdichtung des fließfähigen Formsandes geschieht durch gleichzeitiges Öffnen des der Vakuumeinrichtung zugehörigen Ventils 25 und eines dem Fluidisierungskopf 46 zugeordneten Druckluftventils 48. Gleichzeitig kann bedarfsweise ein am Hubtisch 7 gelagerter Vibrator 49 betätigt werden (vgl. Fig. 1). Die Arbeitsweise für das Aushärten ist die gleiche, wie sie in Verbindung mit den Fig. 1 bis 3 erläutert worden ist.For flowable molding sands, the molding machine is equipped with the sand filling device 44 shown in FIG. 4 instead of the sand filling device 10 shown in FIG. 1. A fluidizing head 46 and a sand slide 47 are arranged at the lower end of the storage container 45. The flowable molding sand is compressed by simultaneously opening the valve 25 associated with the vacuum device and a compressed air valve 48 assigned to the fluidizing head 46. At the same time, a vibrator 49 mounted on the lifting table 7 can be actuated if necessary be (see Fig. 1). The procedure for curing is the same as that explained in connection with FIGS. 1 to 3.

Die einzelnen Arbeitsgänge der Formmaschine werden folgerichtig gesteuert. Ein Arbeitszyklus dauert in Abhängigkeit von der Form- bzw. Kernmasse und der Art des Bindemittels in der Regel 1 bis mehrere Minuten.The individual operations of the molding machine are controlled logically. Depending on the molding or core mass and the type of binder, a work cycle usually lasts 1 to several minutes.

Claims (9)

1. Formmaschine zum Herstellen von Gießformen oder -kernen aus Formsand, bestehend aus einem mit einer Bodenplatte (4) und einer Kopfplatte (12) sowie Schlitzdüsen (3,5,13) versehenen Form- oder Kernkasten (1), seitlich am Form- oder Kernkasten (1) angreifenden Spannbacken (8) und einen den Form-oder Kernkasten (1) gegen eine Sandfülleinrichtung (10 oder 44) drückenden Hubtisch (7), wobei die Sandfülleinrichtung (10 oder 44) mit einem Schießkopf (11) oder einem Fluidisierungskopf (46) und einer über den Form- oder Kernkasten (1) schiebbaren Begasungsplatte (35) ausgerüstet ist, welche über Ventile (39,40) an eine Trägergasquelle oder an Spülluft anschließbar ist, gekennzeichnet durch eine Vakuumeinrichtung, mit der die Schlitzdüsen (3,5,13) des Form- oder Kernkastens (1) durch eine mit einem Ventil (25) ausgeiüstete Saugleitung (24) verbunden sind.1. Molding machine for producing casting molds or cores from molding sand, consisting of a mold or core box (1) provided on the side of the mold with a base plate (4) and a head plate (12) and slot nozzles (3, 5, 13) or core box (1) acting on clamping jaws (8) and a lifting table (7) pressing the mold or core box (1) against a sand filling device (10 or 44), the sand filling device (10 or 44) being equipped with a shooting head (11) or a Fluidization head (46) and a gassing plate (35) which can be pushed over the mold or core box (1) and which can be connected via valves (39, 40) to a carrier gas source or to purging air, characterized by a vacuum device with which the slot nozzles ( 3,5,13) of the molded or core box (1) are connected by a suction line (24) equipped with a valve (25). 2. Formmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die einzelnen, an die Schlitzdüsen (3,5,13) angeschlossenen Saugleitungen in ein Sammelrohr (23) münden, welches einerseits über die Saugleitung (24) und das zugehörige Ventil (25) und anderseits über eine parallele, mit einem Steuerventil (32) und einem Absorptionsapparat (30) ausgerüstete Saugleitung (28,31) mit einem Vakuumbehälter (26) verbunden ist.2. Molding machine according to claim 1, characterized in that the individual suction lines connected to the slot nozzles (3, 5, 13) open into a collecting tube (23) which, on the one hand, via the suction line (24) and the associated valve (25) and on the other hand, is connected to a vacuum container (26) via a parallel suction line (28, 31) equipped with a control valve (32) and an absorption apparatus (30). 3. Formmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß unter der mit Schlitzdüsen (5) ausgerüsteten Bodenplatte (4) ein Hohlschieber (6) angeordnet ist, dessen Hohlraum mit den Schlitzdüsen (5) und dem Sammelrohr (23) verbunden ist.3. Molding machine according to claim 1 or 2, characterized in that a hollow slide (6) is arranged under the bottom plate (4) equipped with slot nozzles (5), the cavity of which is connected to the slot nozzles (5) and the collecting tube (23). 4. Formmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die seitlichen Spannbacken (8) einen Hohlraum aufweisen, der mit den auf der betreffenden Seite vorhandenen Schlitzdüsen (3) und dem Sammelrohr (23) in Verbindung steht.4. Molding machine according to one of claims 1 to 3, characterized in that the lateral clamping jaws (8) have a cavity which communicates with the slot nozzles (3) and the collecting tube (23) on the relevant side. 5. Formmaschine nach Anspruch 4, dadurch gekennzeichnet, daß die Spannbacken (8) auf ihren Anlageflächen mit Dichtungsringen (33,34) versehen sind.5. Molding machine according to claim 4, characterized in that the clamping jaws (8) are provided on their contact surfaces with sealing rings (33, 34). 1. Formmaschine zum Herstellen von Gießformen oder -kernen aus Formsand, bestehend aus einem mit einer Bodenplatte (4) und einer Kopfplatte (12) sowie Schlitzdüsen (3,5,13) versehenen Form- oder Kernkasten (1), seitlich am Form- oder Kernkasten (1) angreifenden Spannbacken (8) und einen den Form-oder Kernkasten (1) gegen eine Sandfülleinrichtung (10 oder 44) drückenden Hubtisch (7), wobei die Sandfülleinrichtung (10 oder 44) mit einem Schießkopf (11) oder einem Fluidisierungskopf (46) und einer über den Form- oder Kernkasten (1) schiebbaren Begasungsplatte (35) ausgerüstet ist, welche über Ventile (39,40) an eine Trägergasquelle oder an Spülluft anschließbar ist, dadurch gekennzeicnnet, daß einzelne, an die Schlitzdüsen (3,5,13) angeschlossene Saugleitungen in ein Sammelrohr (23) münden, welches einerseits über eine Saugleitung (24) und ein zugehöriges Ventil (25) und anderseits über eine parallele, mit einem Steuerventil (32) und einem Absorptionsapparat (30) ausgerüstete Saugleitung (28,31) mit einem Vakuumbehälter (26) verbunden ist.1. Molding machine for producing casting molds or cores from molding sand, consisting of a mold or core box (1) provided on the side of the mold with a base plate (4) and a head plate (12) and slot nozzles (3, 5, 13) or core box (1) acting on clamping jaws (8) and a lifting table (7) pressing the mold or core box (1) against a sand filling device (10 or 44), the sand filling device (10 or 44) being equipped with a shooting head (11) or a Fluidization head (46) and a gassing plate (35) which can be pushed over the mold or core box (1) and which can be connected via valves (39, 40) to a carrier gas source or to purging air, characterized in that individual, to the slot nozzles ( 3,5,13) connected suction lines open into a collecting pipe (23) which on the one hand has a suction line (24) and an associated valve (25) and on the other hand a parallel one equipped with a control valve (32) and an absorption device (30) Suction line (28,31) is connected to a vacuum container (26). 2. Formmaschine nach Anspruch 1, dadurch gekennzeicnnet, daß unter der mit Schlitzdüsen (5) ausgerüsteten Bodenplatte (4) ein Hohlschieber (6) angeordnet ist, dessen Hohlraum mit den Schlitzdüsen (5) und dem Sammelrohr (23) verbunden ist.2. Molding machine according to claim 1, characterized gekennzeicnnet that a hollow slide (6) is arranged under the bottom plate (4) equipped with slot nozzles (5), the cavity of which is connected to the slot nozzles (5) and the collecting tube (23). 3. Formmaschine nach Anspruch 1 oder 2, dadurch gekenn- zeichnet, daß die seitlichen Spannbacken (8) einen Hohlraum aufweisen, der mit den auf der betreffenden Seite vorhandenen Schlitzdüsen (3) und dem Sammelrohr (23) in Verbindung steht.3. A forming machine according to claim 1 or 2 characterized - characterized in that the lateral clamping jaws (8) have a cavity which communicates with the existing on that side of slot nozzles (3) and the manifold (23) in connection. 4. Formmaschine nach Anspruch 3, dadurch gekennzeichnet, daß die Spannbacken (8) auf ihren Anlageflächen mit Dichtungsringen (33,34) versehen sind.4. Molding machine according to claim 3, characterized in that the clamping jaws (8) are provided with sealing rings (33, 34) on their contact surfaces.
EP83200879A 1983-06-16 1983-06-16 Moulding machine for producing moulds or cores from moulding sand Expired EP0128974B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8383200879T DE3366853D1 (en) 1983-06-16 1983-06-16 Moulding machine for producing moulds or cores from moulding sand
AT83200879T ATE22825T1 (en) 1983-06-16 1983-06-16 MOLDING MACHINE FOR MAKING MOLDS OR CORE MOLDS FROM MOLDING SAND.
EP83200879A EP0128974B1 (en) 1983-06-16 1983-06-16 Moulding machine for producing moulds or cores from moulding sand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83200879A EP0128974B1 (en) 1983-06-16 1983-06-16 Moulding machine for producing moulds or cores from moulding sand

Publications (2)

Publication Number Publication Date
EP0128974A1 true EP0128974A1 (en) 1984-12-27
EP0128974B1 EP0128974B1 (en) 1986-10-15

Family

ID=8190965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200879A Expired EP0128974B1 (en) 1983-06-16 1983-06-16 Moulding machine for producing moulds or cores from moulding sand

Country Status (3)

Country Link
EP (1) EP0128974B1 (en)
AT (1) ATE22825T1 (en)
DE (1) DE3366853D1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3842030A1 (en) * 1988-01-08 1989-07-20 Fischer Ag Georg METHOD AND DEVICE FOR COMPRESSING GRAINY MOLDS
EP0379741A1 (en) * 1989-01-24 1990-08-01 Harald Steffens Giessereimaschinen Method for hardening shaped articles, especially casting moulds and cores made of moulding sand
DE4112701A1 (en) * 1991-04-18 1992-10-22 Dossmann Gmbh Eisengiesserei U METHOD AND DEVICE FOR PRODUCING SAND CORE FOR METAL CASTING
US5333669A (en) * 1992-03-16 1994-08-02 Agustin Erana Coreshooters for self-setting process with vacuum system
ES2114416A1 (en) * 1994-10-28 1998-05-16 Erana Agustin Arana Process using reduced blowing pressure and device for blowing complex cores
DE19927107A1 (en) * 1999-06-14 2000-12-21 Fischer Georg Gmbh & Co Kg Device to reduce odorous emissions from a casting installation has a container for bio catalysts and/or enzymes and active region in which the bio catalysts and/or the enzymes interact with the substances causing the odorous emissions
CN102921902A (en) * 2012-11-13 2013-02-13 柳州市勤友贸易有限公司 Composite shaping technique method of iron pattern coated sand and iron type core assembly
DE202018107002U1 (en) 2018-04-12 2019-03-14 Krämer + Grebe GmbH & Co. KG Modellbau Apparatus for producing cores from molding material
DE102018120993A1 (en) * 2018-08-28 2020-03-05 Fritz Winter Eisengiesserei Gmbh & Co. Kg Process for the gassing of molding material injected into a core box for the production of casting cores with a catalyst gas
CN115533043A (en) * 2022-10-29 2022-12-30 衡水冀鑫智能机械科技有限公司 Full-automatic sand mold molding machine capable of vertically shooting sand

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19549422C2 (en) * 1994-02-04 2001-05-10 Sommer Tech Entwicklungen Gmbh Mfg. cores for sand casting
DE19503832C2 (en) * 1994-02-04 1999-01-28 Sommer Tech Entwicklungen Gmbh Method and device for producing sand cores for metal casting
DE102019116531B3 (en) * 2019-06-18 2020-03-26 Krämer + Grebe GmbH & Co. KG Modellbau Device for the production of cores from molded material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2621153A1 (en) * 1976-05-13 1977-11-24 Daimler Benz Ag Hardening sand cores by cold box process - where catalyst is reclaimed from carrier gas after use
DE2833999A1 (en) * 1978-08-03 1980-02-14 Buehler Eugen Pneumatic mfr. of foundry moulds and cores - where sand is drawn by vacuum into core box and is then compacted by compressed air
DE2923062A1 (en) * 1979-06-07 1980-12-11 Wolfgang Ing Grad Boehner Vacuum filling of cavities, esp. boxes used for mfg. sand cores - where vacuum is also used to remove noxious gases evolved during core mfr.
DE3008235A1 (en) * 1980-03-04 1981-09-10 Eugen Dipl.-Ing. 8871 Burtenbach Bühler Foundry sand core or mould making machine - using evacuated core-box to achieve uniform compaction of sand, esp. when mfg. large, complex cores

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036434A1 (en) * 1980-03-25 1981-09-30 Eugen Dipl.-Ing. Bühler Method and device for compacting casting moulds

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2621153A1 (en) * 1976-05-13 1977-11-24 Daimler Benz Ag Hardening sand cores by cold box process - where catalyst is reclaimed from carrier gas after use
DE2833999A1 (en) * 1978-08-03 1980-02-14 Buehler Eugen Pneumatic mfr. of foundry moulds and cores - where sand is drawn by vacuum into core box and is then compacted by compressed air
DE2923062A1 (en) * 1979-06-07 1980-12-11 Wolfgang Ing Grad Boehner Vacuum filling of cavities, esp. boxes used for mfg. sand cores - where vacuum is also used to remove noxious gases evolved during core mfr.
DE3008235A1 (en) * 1980-03-04 1981-09-10 Eugen Dipl.-Ing. 8871 Burtenbach Bühler Foundry sand core or mould making machine - using evacuated core-box to achieve uniform compaction of sand, esp. when mfg. large, complex cores

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3842030A1 (en) * 1988-01-08 1989-07-20 Fischer Ag Georg METHOD AND DEVICE FOR COMPRESSING GRAINY MOLDS
EP0379741A1 (en) * 1989-01-24 1990-08-01 Harald Steffens Giessereimaschinen Method for hardening shaped articles, especially casting moulds and cores made of moulding sand
DE4112701A1 (en) * 1991-04-18 1992-10-22 Dossmann Gmbh Eisengiesserei U METHOD AND DEVICE FOR PRODUCING SAND CORE FOR METAL CASTING
DE4291170C1 (en) * 1991-04-18 1995-06-29 Dossmann Gmbh Eisengieserei Un Setting of resin bonding agent in sand mould or core box
US5333669A (en) * 1992-03-16 1994-08-02 Agustin Erana Coreshooters for self-setting process with vacuum system
ES2114416A1 (en) * 1994-10-28 1998-05-16 Erana Agustin Arana Process using reduced blowing pressure and device for blowing complex cores
DE19927107A1 (en) * 1999-06-14 2000-12-21 Fischer Georg Gmbh & Co Kg Device to reduce odorous emissions from a casting installation has a container for bio catalysts and/or enzymes and active region in which the bio catalysts and/or the enzymes interact with the substances causing the odorous emissions
CN102921902A (en) * 2012-11-13 2013-02-13 柳州市勤友贸易有限公司 Composite shaping technique method of iron pattern coated sand and iron type core assembly
CN102921902B (en) * 2012-11-13 2014-12-03 柳州市勤友贸易有限公司 Composite shaping technique method of iron pattern coated sand and iron type core assembly
DE202018107002U1 (en) 2018-04-12 2019-03-14 Krämer + Grebe GmbH & Co. KG Modellbau Apparatus for producing cores from molding material
DE102019105819B3 (en) 2018-04-12 2019-10-02 Krämer + Grebe GmbH & Co. KG Modellbau Apparatus for producing cores from molding material
WO2020177832A1 (en) 2018-04-12 2020-09-10 Kramer+Grebe Gmbh & Co. Kg Modellbau Device and method for producing cores from mold material
DE102018120993A1 (en) * 2018-08-28 2020-03-05 Fritz Winter Eisengiesserei Gmbh & Co. Kg Process for the gassing of molding material injected into a core box for the production of casting cores with a catalyst gas
WO2020043714A1 (en) 2018-08-28 2020-03-05 Fritz Winter Eisengiesserei Gmbh & Co. Kg Method for fumigating molded material shot into a core box for producing casting cores using a catalyst gas
CN115533043A (en) * 2022-10-29 2022-12-30 衡水冀鑫智能机械科技有限公司 Full-automatic sand mold molding machine capable of vertically shooting sand

Also Published As

Publication number Publication date
DE3366853D1 (en) 1986-11-20
EP0128974B1 (en) 1986-10-15
ATE22825T1 (en) 1986-11-15

Similar Documents

Publication Publication Date Title
EP0128974B1 (en) Moulding machine for producing moulds or cores from moulding sand
DE1921048A1 (en) Apparatus and method for producing sand mold parts
DE2833999C2 (en) Method and device for the production of casting molds and cores
DE2304564A1 (en) Automatic cold-box mould making machine - includes weighing machine and mould assembly devices
DE2842912C2 (en) Method and apparatus for making sand molds or the like.
EP1690614A1 (en) Core blowing machine and method for producing a core
DE69523544T2 (en) Process for vulcanizing pneumatic tires using a tire vulcanizing device
DE2358489A1 (en) METHOD FOR PRODUCING CASTING FORMS AND DEVICE FOR IMPLEMENTING THEM
DE1256361B (en) Method and machine for producing foundry cores
EP0357871B1 (en) Moulding machine
EP0087575B1 (en) Moulding machine for producing flaskless moulds
DE2430403C3 (en) Method and device for the production of casting molds
DE2727297A1 (en) PROCESS AND EQUIPMENT FOR MANUFACTURING FOUNDRY SAND MOLDS
DE2403199B2 (en)
DE2528646C3 (en) Device for the automatic production of boxless casting molds
DE3235099A1 (en) CASTING APPARATUS FOR PRODUCING GAS-HARDENED SAND MOLDS
DE3002702A1 (en) Sand hopper for foundry moulding machine - where stationary press head is used to open or close sand outlet in base of vertically driven hopper
DE1076901B (en) Method and device for producing casting molds
DE3234587A1 (en) METHOD FOR PRODUCING SHEET COMPRESSED COMPONENTS
DE2439091C2 (en) Molding device for forming hollow rubber articles
DE3713937A1 (en) Method for the production of casting moulds and a moulding installation for carrying out the method
DE3234592C2 (en) Method and device for manufacturing SMC parts
DE2925930A1 (en) CONVERTIBLE SAND CORE MACHINE
EP0131723A1 (en) Device for compacting foundry mould material by means of pressurized gas
EP1106281B1 (en) Core blowing method and apparatus

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19840829

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed
AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 22825

Country of ref document: AT

Date of ref document: 19861115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3366853

Country of ref document: DE

Date of ref document: 19861120

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19910612

Year of fee payment: 9

Ref country code: LU

Payment date: 19910612

Year of fee payment: 9

Ref country code: BE

Payment date: 19910612

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910630

Year of fee payment: 9

Ref country code: AT

Payment date: 19910630

Year of fee payment: 9

EPTA Lu: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920521

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920527

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920605

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19920616

Ref country code: AT

Effective date: 19920616

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920617

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19920630

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19920826

Year of fee payment: 10

BERE Be: lapsed

Owner name: HARALD STEFFENS GIESSEREIMASCHINEN

Effective date: 19920630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19930101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19930616

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19930630

Ref country code: CH

Effective date: 19930630

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930616

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940228

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940301

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 83200879.1

Effective date: 19930109