EP0170765B1 - Device for compacting foundry moulding material - Google Patents
Device for compacting foundry moulding material Download PDFInfo
- Publication number
- EP0170765B1 EP0170765B1 EP85102322A EP85102322A EP0170765B1 EP 0170765 B1 EP0170765 B1 EP 0170765B1 EP 85102322 A EP85102322 A EP 85102322A EP 85102322 A EP85102322 A EP 85102322A EP 0170765 B1 EP0170765 B1 EP 0170765B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- moulding
- grille
- opening
- valve
- molding
- 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
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
Definitions
- the invention relates to a device for compressing foundry molding material, which is loosely heaped up in a closed molding space above a model, by means of compressed gas acting on the molding material surface, which suddenly emerges from a pressure vessel of high pressure via a valve between the latter and the molding space in the latter is relaxed, the molding space being formed from a molding box with a filling frame and a model plate representing the bottom thereof, and the valve has a closure member which releases the opening cross section in a few milliseconds.
- a large number of mechanical, pneumatic and combined compression methods are known for the compression of foundry molding material, only the pneumatic methods being of interest in connection with the invention. These can essentially be divided into two categories. In the first category, the molding material is placed under gas pressure in an antechamber and, after opening a valve, is blown or shot into the molding space together with the air. In any case, this process requires mechanical re-pressing of the molding material in the molding box with significant press forces (e.g. DE-AS-2 844 464). In the other category, the molding material is poured onto the model and then suddenly pressurized with compressed air from the back of the mold (e.g. DE-AS-2 844 464, DE-AS-1 961 234).
- the first variant (DE-AS-2 844 464)
- existing compressed air up to 7 bar is blown in once or more times over a period of time between 0.2 and 1 s via openings in a hollow end plate of the molding space, the one flowing through the molding sand Air should flow out through openings in the model plate.
- Mechanical repressing is also necessary here, on the one hand to compress the back of the mold, and on the other hand to squeeze out the residual air that is still present in the molding material due to the fluidization effect, the squeezing also being to be supported by a vacuum. This process does not achieve a noticeable reduction in design effort compared to the closing and blowing processes.
- a molding machine is described (DE-AS-1 961 234), in which a pressure vessel is arranged above the closed molding box or a filling frame arranged above it, which can be connected to the molding space via a mechanically moved valve.
- a pre-pressure of 100 bar is proposed for mold boxes of customary size in order to achieve a satisfactory compression there after relaxation in the mold space.
- Such a high pressure easily leads to irregularities in the surface of the molding material when the compressed gas impinges on the back of the mold, as well as to a considerable design effort in order to generate such high pressures and to achieve the necessary compressive strength in the molding space.
- the valve of the known device is a poppet valve which is opened by means of a combined pneumatic-mechanical auxiliary drive against the pressure in the pressure vessel and closes an opening of a relatively small cross-section between the pressure vessel and the molding box.
- a distributor cone is provided under the valve opening and underneath there is a perforated floor that extends over the entire mold area or, in another variant, an adjustable slot floor (DE-OS-2 151 949).
- the present invention has for its object to provide a device by means of which a uniform and sufficiently high compression with a uniform molding material surface is possible with comparatively little design effort.
- the pressure vessel has an opening corresponding to the outline of the molding box, against the edge of which the molding box can be pressed in a sealing manner with the filling frame and that a fixed grate is inserted into the opening and a sliding grate is arranged above it Effect of a spring preload acting in its plane and by Lock is held in the closed position, after unlocking it can be moved into the open position under the spring preload.
- the opening cross-section can be released in a very short time with a small opening stroke, which only has to correspond to the width of the grate bar, which enables rapid gas transfer and mass throughput. It is also favorable that the drive of the sliding grate for opening is decoupled from those parts which provide the closure of the sliding grate.
- the sliding grate With regard to the design of the sliding grate, it has proven to be advantageous that it is provided on its side facing the fixed grate with strips made of a wear-resistant, sealing material.
- the fixed grate For the formation of the fixed grate, it is advisable to stiffen it on its strips by ribs so that it can better absorb the static load of the compressed gas.
- the invention is described in more detail below with reference to the drawing.
- the drawing shows a schematic, partially sectioned side view of the device.
- the machine stand the devices for lifting and lowering the molding box and filling frame and, if appropriate, for ejecting the finished mold are not shown.
- the facilities for bringing up the model and for filling in the molding sand are also not shown, since all of the above-mentioned components are known in foundry mechanical engineering.
- a molding box (2) sits on a model plate (1) with the model (not shown) and a filling frame (3) on this. These parts form the mold space.
- a pressure vessel (4) for holding pressurized gas up to 20 bar is arranged above the molding space and is fed via a nozzle (5) from a pressure accumulator or - at low admission pressure - from the compressed air network.
- the pressure vessel (4) has a centrally arranged opening (6) at the bottom, the clear width of which corresponds approximately to the free horizontal cross section of the filling frame (3) or the molding box (2).
- the unit consisting of model plate (1), molding box (2) and filling frame (3) can be pressed against the pressure vessel with said opening (6) from below.
- a closure member (9) is inserted into the opening (6) of the pressure vessel (4). It consists of strips (101) of a fixed grate (102) and a sliding grate (103) arranged above them. The strips (104) of the sliding grate (103) are provided on their underside with a sealing material (105), for example low-pressure PE.
- the strips (101) of the fixed grate (102) are additionally supported by ribs (106) against the static load of the compressed gas.
- the sliding grate (103) is under the action of a spring (107) and is held in the closed position shown by a locking lever (108). By pivoting the lever (108) the lock is released and the stored spring force can suddenly relax, so that the sliding grate (103) is accelerated into its open position until the strips (101) and (104) of the two grids lie one above the other. Attenuators, not shown, can brake the impact of the sliding grate (104) in the open position.
- the sliding grate (103) can be reset in a conventional manner until the locking lever (108) can be moved back into the locked position.
Description
Die Erfindung betrifft eine Vorrichtung zum Verdichten von Gießerei-Formstoff, der in einem geschlossenen Formraum über einem Modell lose aufgeschüttet ist, mittels auf die Formstoff-Oberfläche wirkendem Druckgas, das aus einem Druckbehälter hohen Drucks über ein Ventil zwischen diesem und dem Formraum in letzteren schlagartig entspannt wird, wobei der Formraum aus einem Formkasten mit Füllrahmen und einer dessen Boden darstellenden Modellplatte mit dem Modell gebildet ist und das Ventil ein Verschlußorgan aufweist, das den Öffnungsquerschnitt in wenigen Millisekunden freigibt.The invention relates to a device for compressing foundry molding material, which is loosely heaped up in a closed molding space above a model, by means of compressed gas acting on the molding material surface, which suddenly emerges from a pressure vessel of high pressure via a valve between the latter and the molding space in the latter is relaxed, the molding space being formed from a molding box with a filling frame and a model plate representing the bottom thereof, and the valve has a closure member which releases the opening cross section in a few milliseconds.
Für die Verdichtung von Gießerei-Formstoff sind eine Vielzahl von Verdichtungsverfahren mechanischer, pneumatischer und kombinierter Art bekannt, wobei in Zusammenhang mit der Erfindung nur die pneumatischen Verfahren interessieren. Diese lassen sich im wesentlichen in zwei Kategorien unterscheiden. Bei der ersten Kategorie wird der Formstoff in einem Vorraum unter Gasdruck gesetzt und nach Öffnen eines Ventils zusammen mit der Luft in den Formraum eingeblasen oder eingeschossen. Dieses Verfahren erfordert in jedem Fall ein mechanisches Nachpressen des Formstoffs im Formkasten mit nennenswerten Preßkräften (z. B. DE-AS-2 844 464). Bei der anderen Kategorie wird der Formstof flose auf das Modell aufgeschüttet und anschließend vom Formrücken her mit Druckluft schlagartig beaufschlagt (z. B. DE-AS-2 844 464, DE-AS-1 961 234).A large number of mechanical, pneumatic and combined compression methods are known for the compression of foundry molding material, only the pneumatic methods being of interest in connection with the invention. These can essentially be divided into two categories. In the first category, the molding material is placed under gas pressure in an antechamber and, after opening a valve, is blown or shot into the molding space together with the air. In any case, this process requires mechanical re-pressing of the molding material in the molding box with significant press forces (e.g. DE-AS-2 844 464). In the other category, the molding material is poured onto the model and then suddenly pressurized with compressed air from the back of the mold (e.g. DE-AS-2 844 464, DE-AS-1 961 234).
Dabei sind im wesentlichen zwei Varianten bekannt. Bei der ersten Variante (DE-AS-2 844 464) wird über Öffnungen in einer hohlen Abschlußplatte des Formraums betriebsintern vorhandene Preßluft bis zu 7 bar über eine Zeitdauer zwischen 0,2 und 1 s einmal oder mehrmals eingeblasen, wobei die durch den Formsand strömende Luft über Öffnungen in die Modellplatte abströmen soll. Auch hier ist ein mechanisches Nachpressen notwendig, um einerseits den Formrücken zu verdichten, andererseits die aufgrund des Fluidisierungseffektes in dem Formstoff noch vorhandene Restluft abzupressen, wobei das Abpressen zusätzlich durch Unterdruck unterstützt werden soll. Eine nennenswerte Minderung an konstruktivem Aufwand gegenüber den Schließ- und Blasverfahren wird mit diesem Verfahren nicht erreicht.Essentially two variants are known. In the first variant (DE-AS-2 844 464), existing compressed air up to 7 bar is blown in once or more times over a period of time between 0.2 and 1 s via openings in a hollow end plate of the molding space, the one flowing through the molding sand Air should flow out through openings in the model plate. Mechanical repressing is also necessary here, on the one hand to compress the back of the mold, and on the other hand to squeeze out the residual air that is still present in the molding material due to the fluidization effect, the squeezing also being to be supported by a vacuum. This process does not achieve a noticeable reduction in design effort compared to the closing and blowing processes.
Bei der anderen Verfahrensvariante (DE-AS-1 961 234) wird im Hochdruckbereich gearbeitet, was hier heißen soll, daß der Druck im Vorraum nennenswert über dem Betriebsdruck eines üblichen innerbetrieblichen Druckluftnetzes von bis zu 7 bar liegt. Im bekannten Fall wird ein Vordruck zwischen 20 und 100 bar vorgeschlagen. Dieser Druck soll dann in den Formraum innerhalb maximal 0,15 s entspannt werden. Dabei soll auf das sonst übliche Nachpressen verzichtet werden können. Als weitere Voraussetzung für die Wirksamkeit dieses Verfahrens wird ein bestimmtes Verhältnis von Gasdurchsatz einerseits und Formstoffmasse andererseits gefordert, wobei dieses Verhältnis zwischen 5 : 1 und 40 : 1 betragen soll, womit zugleich eine Abhängigkeit zwischen Gasdurchsatz und Formkastengröße gegeben ist. Zur Durchführung des Verfahrens ist eine Formmaschine beschrieben (DE-AS-1 961 234), bei der oberhalb des geschlossenen Formkastens bzw. einem darüber angeordneten Füllrahmen ein Druckbehälter angeordnet ist, der über ein mechanisch bewegtes Ventil mit dem Formraum verbindbar ist. Bei vertretbarer Baugröße wird für Formkästen üblicher Größe ein Vordruck von 100 bar vorgeschlagen, um nach der Entspannung in den Formraum dort eine befriedigende Verdichtung zu erreichen. Ein derart hoher Druck führt beim Aufprallen des Druckgases auf den Formrücken leicht zu Unregelmäßigkeiten in der Formstoff-Oberfläche, wie auch zu einem erheblichen konstruktiven Aufwand, um solche hohen Drücke zu erzeugen und die notwendige Druckfestigkeit im Formraum zu erreichen. Das Ventil der bekannten Vorrichtung ist ein Tellerventil, das mittels eines kombinierten pneumatisch-mechanischen Hilfsantriebs gegen den Druck im Druckbehälter geöffnet wird und eine Öffnung von verhältnismäßig kleinem Querschnitt zwischen Druckbehälter und Formkasten verschließt. Um das Druckgas nicht strahlenförmig auf die Formstoff-Oberfläche aufprallen zu lassen, ist weiterhin unter der Ventilöffnung ein Verteilerkonus und darunter ein sich über die gesamte Formraumfläche erstreckender Lochboden oder in einer anderen Variante ein einstellbarer Schlitzboden (DE-OS-2 151 949) vorgesehen. Mit dieser Vorrichtung läßt sich der bei diesem Gasdruck-Formverfahren geforderte hohe Druckgradient von beispielsweise mehr als 300 bar/s im Formraum nicht erreichen, da das Ventil gegen den Druck geöffnet werden muß und der Offnungsquerschnitt des Ventils zu klein ist, um das Druckgas schlagartig überströmen zu lassen. Hinzu kommt der Strömungswiderstand aus dem Ventil nachgeschalteten Verteilerkonus und des Lochbodens, die zu einer weiteren Verzögerung führen.In the other process variant (DE-AS-1 961 234), work is carried out in the high pressure range, which is to say here that the pressure in the anteroom is appreciably above the operating pressure of a customary internal compressed air network of up to 7 bar. In the known case, a pre-pressure between 20 and 100 bar is proposed. This pressure should then be released into the mold space within a maximum of 0.15 s. It should be possible to dispense with the usual re-pressing. As a further prerequisite for the effectiveness of this process, a certain ratio of gas throughput on the one hand and molding material mass on the other hand is required, this ratio should be between 5: 1 and 40: 1, which at the same time gives a dependency between gas throughput and mold box size. For the implementation of the method, a molding machine is described (DE-AS-1 961 234), in which a pressure vessel is arranged above the closed molding box or a filling frame arranged above it, which can be connected to the molding space via a mechanically moved valve. With a reasonable size, a pre-pressure of 100 bar is proposed for mold boxes of customary size in order to achieve a satisfactory compression there after relaxation in the mold space. Such a high pressure easily leads to irregularities in the surface of the molding material when the compressed gas impinges on the back of the mold, as well as to a considerable design effort in order to generate such high pressures and to achieve the necessary compressive strength in the molding space. The valve of the known device is a poppet valve which is opened by means of a combined pneumatic-mechanical auxiliary drive against the pressure in the pressure vessel and closes an opening of a relatively small cross-section between the pressure vessel and the molding box. In order to prevent the compressed gas from striking the surface of the molding material in a radial manner, a distributor cone is provided under the valve opening and underneath there is a perforated floor that extends over the entire mold area or, in another variant, an adjustable slot floor (DE-OS-2 151 949). With this device, the high pressure gradient of, for example, more than 300 bar / s in the molding space required in this gas pressure molding process cannot be achieved, since the valve must be opened against the pressure and the opening cross section of the valve is too small to suddenly flow over the compressed gas allow. In addition, there is the flow resistance from the valve downstream of the distributor cone and the perforated base, which lead to a further delay.
Von diesem Stand der Technik ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, eine Vorrichtung zu schaffen, mit deren Hilfe eine gleichmäßig und ausreichend hohe Verdichtung bei gleichmäßiger Formstoff-Oberfläche mit vergleichsweise geringem konstruktiven Aufwand möglich ist.Starting from this prior art, the present invention has for its object to provide a device by means of which a uniform and sufficiently high compression with a uniform molding material surface is possible with comparatively little design effort.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß der Druckbehälter eine dem Umriß des Formkastens entsprechende Öffnung aufweist, gegen deren Rand der Formkasten mit dem Füllrahmen dichtend anpreßbar ist und das in die Öffnung ein feststehender Rost eingesetzt und darüber ein Schieberost angeordnet ist, der unter Wirkung einer in seiner Ebene wirkenden Federvorspannung steht und durch eine Verriegelung in der Schließlage gehalten ist, nach deren Entriegelung er unter der Federvorspannung in die Öffnungslage bewegbar ist.This object is achieved according to the invention in that the pressure vessel has an opening corresponding to the outline of the molding box, against the edge of which the molding box can be pressed in a sealing manner with the filling frame and that a fixed grate is inserted into the opening and a sliding grate is arranged above it Effect of a spring preload acting in its plane and by Lock is held in the closed position, after unlocking it can be moved into the open position under the spring preload.
Mit dieser Ausbildung entsteht einerseits eine kompakte Baueinheit, andererseits ergibt sich ein hoher Öffnungsquerschnitt, der sich über den gesamten Formkasten- bzw. Füllrahmenquerschnitt erstreckt.With this design, on the one hand a compact structural unit is created, on the other hand there is a large opening cross section which extends over the entire cross section of the molding box or filling frame.
Dadurch wird das Druckgas bei geöffnetem Schieberost gleichmäßig und vollflächig auf die Formstoff-Oberfläche entspannt.As a result, when the sliding grate is open, the compressed gas is relaxed evenly and over the entire surface of the molding material.
Durch die rostartige Ausbildung läßt sich bei geringem Öffnungshub, der lediglich der Roststabbreite entsprechen muß, in kürzester Zeit der Öffnungsquerschnitt freigeben, was einen schnellen Gasübertritt und Massendurchsatz ermöglicht. Auch ist es günstig, daß der Antrieb des Schieberostes für das Öffnen abgekoppelt ist von denjenigen Teilen, die den Verschluß des Schieberostes besorgen.Due to the rust-like design, the opening cross-section can be released in a very short time with a small opening stroke, which only has to correspond to the width of the grate bar, which enables rapid gas transfer and mass throughput. It is also favorable that the drive of the sliding grate for opening is decoupled from those parts which provide the closure of the sliding grate.
Hinsichtlich der Ausbildung des Schieberostes hat es sich als günstig erwiesen, daß er an seiner dem feststehenden Rost zugewandten Seite mit Leisten aus einem verschleißfesten, dichtenden Werkstoff versehen ist.With regard to the design of the sliding grate, it has proven to be advantageous that it is provided on its side facing the fixed grate with strips made of a wear-resistant, sealing material.
Für die Ausbildung des feststehenden Rostes empfiehlt es sich, ihn an seinen Leisten durch Rippen zu versteifen, damit er besser die statische Last des Druckgases aufzunehmen vermag.For the formation of the fixed grate, it is advisable to stiffen it on its strips by ribs so that it can better absorb the static load of the compressed gas.
Schließlich bietet sich die vorteilhafte Möglichkeit, das gesamte Verschlußorgan und die es haltenden Teile zu einer Baueinheit zusammenzufassen, die an dem Druckbehälter auswechselbar angebracht ist.Finally, there is the advantageous possibility of combining the entire closure member and the parts holding it into a structural unit which is interchangeably attached to the pressure vessel.
Nachstehend wird die Erfindung anhand der Zeichnung näher beschrieben. Die Zeichnung zeigt eine schematische, teilweise geschnittene Seitenansicht der Vorrichtung.The invention is described in more detail below with reference to the drawing. The drawing shows a schematic, partially sectioned side view of the device.
In der Zeichnung sind nur die zum Verständnis der Erfindung notwendigen Teile einer Verdichtungsvorrichtung wiedergegeben.In the drawing, only the parts of a compression device necessary for understanding the invention are shown.
Es sind insbesondere nicht gezeigt der Maschinenständer, die Einrichtungen zum Heben und Senken von Formkasten und Füllrahmen sowie gegebenenfalls zum Ausstoßen der fertigen Form. Ebensowenig sind die Einrichtungen zum Heranbringen des Modells und zum Einfüllen des Formsandes wiedergegeben, da alle vorher genannten Bauteile im Gießerei- Maschinenbau bekannt sind.In particular, the machine stand, the devices for lifting and lowering the molding box and filling frame and, if appropriate, for ejecting the finished mold are not shown. The facilities for bringing up the model and for filling in the molding sand are also not shown, since all of the above-mentioned components are known in foundry mechanical engineering.
Auf einer Modellplatte (1) mit dem nicht dargestellten Modell sitzt ein Formkasten (2) und auf diesem ein Füllrahmen (3). Diese Teile bilden den Formraum. Oberhalb des Formraumes ist ein Druckbehälter (4) zur Aufnahme von Druckgas bis zu 20 bar angeordnet, der über einen Stutzen (5) aus einem Druckspeicher oder - bei niedrigem Vordruck - aus dem Druckluftnetz gespeißt wird.A molding box (2) sits on a model plate (1) with the model (not shown) and a filling frame (3) on this. These parts form the mold space. A pressure vessel (4) for holding pressurized gas up to 20 bar is arranged above the molding space and is fed via a nozzle (5) from a pressure accumulator or - at low admission pressure - from the compressed air network.
Der Druckbehälter (4) weist unten eine zentrisch angeordnete Öffnung (6) auf, deren lichte Weite etwa dem freien horizontalen Querschnitt des Füllrahmens (3) bzw. des Formkastens (2) entspricht. Gegen den Druckbehälter mit der genannten Öffnung (6) ist die aus Modellplatte (1), Formkasten (2) und Füllrahmen (3) bestehende Einheit von unten her anpreßbar.The pressure vessel (4) has a centrally arranged opening (6) at the bottom, the clear width of which corresponds approximately to the free horizontal cross section of the filling frame (3) or the molding box (2). The unit consisting of model plate (1), molding box (2) and filling frame (3) can be pressed against the pressure vessel with said opening (6) from below.
Wie die Zeichnung weiter zeigt, ist in die Öffnung (6) des Druckbehälters (4) ein Verschlußorgan (9) eingesetzt. Es besteht aus Leisten (101) eines feststehenden Rostes (102) und einem darüber angeordnetem Schieberost (103). Die Leisten (104) des Schieberostes (103) sind an ihrer Unterseite mit einem Dichtwerkstoff (105), beispielsweise Niederdruck-PE, versehen.As the drawing further shows, a closure member (9) is inserted into the opening (6) of the pressure vessel (4). It consists of strips (101) of a fixed grate (102) and a sliding grate (103) arranged above them. The strips (104) of the sliding grate (103) are provided on their underside with a sealing material (105), for example low-pressure PE.
Andererseits sind die Leisten (101) des feststehenden Rostes (102) gegen die statische Last des Druckgases zusätzlich durch Rippen (106) abgestützt.On the other hand, the strips (101) of the fixed grate (102) are additionally supported by ribs (106) against the static load of the compressed gas.
Der Schieberost (103) steht unter der Wirkung einer Feder (107) und wird durch einen Verriegelungshebel (108) in der gezeichneten Schließstellung gehalten. Durch Hochschwenken des Hebels (108) wird die Verriegelung aufgehoben und die gespeicherte Federkraft kann sich schlagartig entspannen, so daß der Schieberost (103) in seine Öffnungslage beschleunigt wird, bis die Leisten (101) und (104) der beiden Roste übereinander liegen. Nicht gezeigte Dämpfungsglieder können den Aufprall des Schieberostes (104) in der Öffnungsstellung abbremsen.The sliding grate (103) is under the action of a spring (107) and is held in the closed position shown by a locking lever (108). By pivoting the lever (108) the lock is released and the stored spring force can suddenly relax, so that the sliding grate (103) is accelerated into its open position until the strips (101) and (104) of the two grids lie one above the other. Attenuators, not shown, can brake the impact of the sliding grate (104) in the open position.
Die Rückstellung des Schieberostes (103) kann in herkömmlicher Weise erfolgen, bis sich der Verriegelungshebel (108) wieder in die Sperrlage bewegen läßt.The sliding grate (103) can be reset in a conventional manner until the locking lever (108) can be moved back into the locked position.
Claims (4)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3151645 | 1981-12-28 | ||
| DE3151645 | 1981-12-28 | ||
| DE3206208 | 1982-02-20 | ||
| DE3206208 | 1982-02-20 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82110996.4 Division | 1982-11-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0170765A1 EP0170765A1 (en) | 1986-02-12 |
| EP0170765B1 true EP0170765B1 (en) | 1988-08-31 |
Family
ID=25798338
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82110996A Expired EP0084627B1 (en) | 1981-12-28 | 1982-11-27 | Device for compacting foundry moulding material |
| EP85102322A Expired EP0170765B1 (en) | 1981-12-28 | 1982-11-27 | Device for compacting foundry moulding material |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82110996A Expired EP0084627B1 (en) | 1981-12-28 | 1982-11-27 | Device for compacting foundry moulding material |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US4529026A (en) |
| EP (2) | EP0084627B1 (en) |
| DD (1) | DD203693A5 (en) |
| PL (1) | PL239713A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170917A (en) * | 2015-09-30 | 2015-12-23 | 共享铸钢有限公司 | Quick molding tool and method for large-sized disc castings |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH664914A5 (en) * | 1982-10-15 | 1988-04-15 | Fischer Ag Georg | DEVICE FOR COMPRESSING A DIMENSION OF GRINED MOLDING MATERIAL. |
| DE3327822A1 (en) * | 1983-08-02 | 1985-02-14 | Josef Mertes Engineering für Gießereianlagen, 5928 Laasphe | METHOD AND DEVICE FOR COMPRESSING GRAIN-MOLDED MOLDING SUBSTANCES e.g. FOUNDRY MOLD SAND |
| DE3344520A1 (en) * | 1983-12-09 | 1985-06-20 | BMD Badische Maschinenfabrik Durlach GmbH, 7500 Karlsruhe | DEVICE FOR COMPRESSING FOUNDRY MOLD BY PRESSURE GAS |
| CH666426A5 (en) * | 1984-06-25 | 1988-07-29 | Fischer Ag Georg | MOLDING PLANT. |
| DE3518980A1 (en) * | 1985-05-25 | 1986-11-27 | BMD Badische Maschinenfabrik Durlach GmbH, 7500 Karlsruhe | DEVICE FOR COMPRESSING FOUNDRY MOLD BY PRESSURE GAS |
| CH672270A5 (en) * | 1986-12-17 | 1989-11-15 | Fischer Ag Georg | |
| ES2006861A6 (en) * | 1988-03-21 | 1989-05-16 | Lopez Foronda Fernandez Vicent | Improvements introduced in airvessels for molding by expansive waves. |
| ES2011685A6 (en) * | 1988-10-21 | 1990-02-01 | Lopez Foronda Fernandez Vicent | Improvements introduced in air impact molding machines. |
| DE3836876C2 (en) * | 1988-10-29 | 1994-06-09 | Badische Maschf Gmbh | Method and device for compacting foundry molding material |
| CH686412A5 (en) * | 1992-03-10 | 1996-03-29 | Fischer Georg Giessereianlagen | A method of compacting molding sand for molds. |
| EP0849017B1 (en) * | 1996-12-17 | 2001-10-04 | Loramendi, S.A. | Improved sand mould air impact or blast compacting machine |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1102978B (en) * | 1954-12-29 | 1961-03-23 | Dietrich Pulvermacher | Press molding machine |
| DE1961234C3 (en) * | 1969-12-05 | 1975-02-06 | Kramatorskij Nautschno-Issledowatel' Skij I Projektno-Technologitscheskij Institut Maschinostrojenija, Kramatorsk (Sowjetunion) | Method and device for compacting casting molding compounds |
| DE2151949A1 (en) * | 1971-10-19 | 1973-04-26 | Kramatorskij Ni I Pt I Mash | Gas densified moulding box - with value set into entry port |
| DE2206672C3 (en) * | 1972-02-11 | 1975-11-13 | Nautschno-Issledowatelskij Institut Technologii Awtomobilnoj Promyschlennosti, Moskau | Pneumatic device for the forced filling of core and molding boxes with molding material |
| IT1006433B (en) * | 1974-04-12 | 1976-09-30 | Fomes Sa | SAND BLOWING HEAD IN MOLDS FOR THE PRODUCTION OF FOUNDRY CORE |
| DE2653788C2 (en) * | 1976-11-26 | 1981-08-27 | Bühler, Eugen, Dipl.-Ing., 8871 Burtenbach | Method and device for producing casting molds from molding sand containing binding agents |
| DE2833999C2 (en) * | 1978-08-03 | 1981-11-19 | Eugen Dipl.-Ing. 8871 Burtenbach Bühler | Method and device for the production of casting molds and cores |
| DE2842912C2 (en) * | 1978-10-02 | 1983-06-01 | Alfelder Maschinen- und Modell-Fabrik Künkel, Wagner & Co KG, 3220 Alfeld | Method and apparatus for making sand molds or the like. |
| DE2844464C2 (en) * | 1978-10-12 | 1983-03-24 | Bühler, Eugen, Dipl.-Ing., 8871 Burtenbach | Method and device for compacting casting molds |
| JPS55141355A (en) * | 1979-04-19 | 1980-11-05 | Sintokogio Ltd | Mold molding method and its device |
| JPS55147459A (en) * | 1979-08-28 | 1980-11-17 | Nakada Giken:Kk | Mold molding method |
| CH642288A5 (en) * | 1980-02-18 | 1984-04-13 | Fischer Ag Georg | METHOD AND DEVICE FOR COMPRESSING MOLDING MATERIAL, ESPECIALLY FOR CASTING MOLDS. |
| SU1006042A1 (en) * | 1981-03-12 | 1983-03-23 | Simchenko Boris N | Pulse head |
-
1982
- 1982-11-27 EP EP82110996A patent/EP0084627B1/en not_active Expired
- 1982-11-27 EP EP85102322A patent/EP0170765B1/en not_active Expired
- 1982-12-23 PL PL23971382A patent/PL239713A1/en unknown
- 1982-12-27 US US06/453,093 patent/US4529026A/en not_active Expired - Fee Related
- 1982-12-28 DD DD82246681A patent/DD203693A5/en not_active IP Right Cessation
-
1985
- 1985-05-21 US US06/736,261 patent/US4609033A/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105170917A (en) * | 2015-09-30 | 2015-12-23 | 共享铸钢有限公司 | Quick molding tool and method for large-sized disc castings |
Also Published As
| Publication number | Publication date |
|---|---|
| US4529026A (en) | 1985-07-16 |
| PL239713A1 (en) | 1983-08-01 |
| US4609033A (en) | 1986-09-02 |
| EP0170765A1 (en) | 1986-02-12 |
| EP0084627B1 (en) | 1986-05-07 |
| EP0084627A1 (en) | 1983-08-03 |
| DD203693A5 (en) | 1983-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2844464C2 (en) | Method and device for compacting casting molds | |
| EP0170765B1 (en) | Device for compacting foundry moulding material | |
| DE3105350C2 (en) | Device for compacting molding material, in particular for casting molds | |
| DE1502233B1 (en) | Compression press with a mechanical stop | |
| DE2935077A1 (en) | PRESS FOR MOLDED PARTS | |
| DE3243951C2 (en) | ||
| DE2933869C2 (en) | Method and device for producing a lower molded part | |
| DE3238712C2 (en) | ||
| DE4319078C2 (en) | Process and mold making machine for the production of molds or mold parts from molding sand | |
| EP0432277B1 (en) | Method and device for making single-casting moulds | |
| EP0139119B2 (en) | Method of and installation for compacting granular moulding materials, for example foundry mould sand | |
| EP0131723B1 (en) | Device for compacting foundry mould material by means of pressurized gas | |
| EP0673698B1 (en) | Method for the production of moulds | |
| DE3518980C2 (en) | ||
| DE19913119B4 (en) | Process for producing a sand mold | |
| EP0152573B1 (en) | Apparatus for compacting foundry-moulding material using pressure gas | |
| DD224248A5 (en) | DEVICE FOR COMPRESSING FOUNDRY MOLDING MATERIAL | |
| DE3432368C2 (en) | ||
| DE3839475C2 (en) | ||
| DE138686C (en) | ||
| DE2802331A1 (en) | Control for press hydraulic fluid - has cylindrical housing with coaxial opening connected with cylinder of hydraulic drive | |
| DE8606530U1 (en) | Device for making casting molds | |
| DE3801497A1 (en) | Shooting head for a suction-type squeeze-moulding machine and a method for its operation | |
| DE3238802A1 (en) | Apparatus for producing sand moulds and sand cores | |
| DD202114A5 (en) | METHOD AND DEVICE FOR PNEUMATIC COMPACTING FORMSAND |
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 |
|
| AC | Divisional application: reference to earlier application |
Ref document number: 84627 Country of ref document: EP |
|
| AK | Designated contracting states |
Designated state(s): CH FR GB IT LI SE |
|
| 17P | Request for examination filed |
Effective date: 19851220 |
|
| 17Q | First examination report despatched |
Effective date: 19860926 |
|
| ITF | It: translation for a ep patent filed |
Owner name: BARZANO' E ZANARDO ROMA S.P.A. |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AC | Divisional application: reference to earlier application |
Ref document number: 84627 Country of ref document: EP |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH FR GB IT LI SE |
|
| ET | Fr: translation filed | ||
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
| 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: 19920831 Year of fee payment: 11 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19931128 |
|
| ITTA | It: last paid annual fee | ||
| EUG | Se: european patent has lapsed |
Ref document number: 85102322.6 Effective date: 19940610 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19950904 Year of fee payment: 14 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19960130 Year of fee payment: 14 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19961018 Year of fee payment: 15 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19961127 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19961130 Ref country code: CH Effective date: 19961130 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19961127 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19971130 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |