EP0359786A1 - Process for making moulded parts. - Google Patents
Process for making moulded parts.Info
- Publication number
- EP0359786A1 EP0359786A1 EP89901708A EP89901708A EP0359786A1 EP 0359786 A1 EP0359786 A1 EP 0359786A1 EP 89901708 A EP89901708 A EP 89901708A EP 89901708 A EP89901708 A EP 89901708A EP 0359786 A1 EP0359786 A1 EP 0359786A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- insert
- nozzle
- nozzles
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/06—Core boxes
- B22C7/065—Venting means
Definitions
- the invention relates to a process for the production of molded parts, in the interior of which a medium is introduced, in particular for the production of core boxes or core boxes for core shooting, ventilation and / or ventilation openings being provided in the molding space and being occupied, for example, with nozzles.
- the present invention relates above all to the production of a core box in which a core is produced from a corresponding core sand mixture, it can also be used in other similar processes.
- An important criterion for optimal core sand mixtures is not only the good surface of the casting and the stability of the core until casting, but also the good disintegration of the molded part after casting. This property significantly affects the cleaning effort on the cast blank.
- Core molding material mixtures should therefore be aimed for, which, as cores, show as much burned-out amount of molding material as possible after the casting (detachment from the inner wall of the sleeve) and guarantee a rapid disintegration of the residual body from the casting when shaken out.
- the inventor has set itself the goal of developing a method of the type mentioned above, by means of which this disadvantage is eliminated and thus the manufacture of the core sleeves is made considerably easier and thus cheaper.
- At least one insert is used in the molding of the molded part (core), in particular the core sleeve, the shape of which corresponds to the nozzle, and this insert is removed after the core sleeve is shaped and replaced by the nozzle.
- the application can be, for example, a material that dissolves itself.
- the insert is preferably contemplated to manufacture the insert from plastic or, to a limited extent, from metal.
- a pressure line which can later be used as a ventilation hose. If the pressure line is placed under the pressure of a pressure medium, the insert is shot out of its seat so that the nozzles can be inserted without further ado.
- the insert has a blind bore on the end face with an internal thread, into which a corresponding pin can be screwed and the insert is pulled out of its seat by means of this pin.
- Figure 1 is a schematic representation of a method for producing molds and cores.
- FIG. 3 shows a side view of a further exemplary embodiment of an insert according to the invention.
- FIG. 4 shows an end view of the insert according to FIG. 3.
- FIG. 1 schematically shows the so-called cold-b ⁇ x process, which is also referred to as the gas-fog process.
- a core 5, which is formed therein, is located in a core box 1 or a core sleeve composed of the upper part 2 and lower part 3.
- the shaping can also take place in a corresponding inlaid soul.
- the core box 1 is assigned a shooting head 6 of a core shooting machine (not shown in more detail), a suitable sand mixture, for example dry quartz sand and liquid two-component binder, being shot in via appropriate bullet holes 7.
- a suitable sand mixture for example dry quartz sand and liquid two-component binder
- the core box 1 arrives in a further station 8, in which it is received by a chamber 9, which is only shown schematically.
- a mixture of air and liquid catalyst is fed to this chamber 9 via a line 10, air and liquid catalyst being mixed with one another in a spray nozzle 11.
- air according to arrow 12 and catalyst according to arrow 13 reach spray nozzle 11. This causes the sand mixture to harden.
- nozzles 19 are generally provided toward the core 5, it being possible for up to 100 or more such nozzles 19 to be provided in each core sleeve. These nozzles 19 serve to better distribute the catalyst mist. However, they also serve for venting, for example through the corresponding vent holes 14.
- the catalyst mist then passes through an exhaust air line 15 into a container 16 with cleaning liquid 17.
- the cleaned mist can then escape into the atmosphere as indicated by the arrows 18.
- the nozzles 19 must be inserted into the core sleeve 1.
- inserts 20 are placed or glued into the core sleeve 1 to be produced or to the core core, the dimensions of which correspond to the nozzles 19.
- the insert 20 is connected to a compressed air line 21. To remove the insert 20, compressed air is supplied via the compressed air line 21 and this insert 20 is thus virtually shot out of its seat in the core sleeve.
- FIG. 3 shows a further exemplary embodiment of an insert 20a which has a molded part 22.
- this projection 22 protrudes from the formed inner wall in the inner region of the core sleeve 1, so that the insert 20a can be pulled out with a suitable tool or knocked out of its seat.
- FIG. 3 also shows another possible variation, in which case the molding 22 does not have to be present.
- this third exemplary embodiment of an insert 20b it then has a blind hole 24 in its end face 23, which has an internal thread 25. A corresponding threaded rod can now be screwed into this blind hole 24 and the insert 20b can thus be pulled out of its seat.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
Abstract
Dans un procédé pour fabriquer des pièces moulées, à l'intérieur desquelles est introduit un milieu, notamment pour fabriquer des boîtes à noyau pour le tirage des noyaux, des orifices d'aération pourvus d'ajutages sont prévus dans l'espace de moulage. Lors du moulage de la pièce ou d'un noyau disposé dans celle-ci, notamment de la boîte à noyau, on utilise au moins un insert dont la forme correspond à l'ajutage, et on enlève cet insert après le moulage de la boîte à noyau et on le remplace par l'ajutage.In a process for manufacturing molded parts, into which a medium is introduced, in particular for manufacturing core boxes for the pulling of the cores, ventilation openings provided with nozzles are provided in the molding space. During the molding of the part or of a core disposed therein, in particular of the core box, at least one insert is used, the shape of which corresponds to the nozzle, and this insert is removed after the molding of the box. core and replaced by the nozzle.
Description
Verfahren zum Herstellen von FormteilenProcess for the production of molded parts
Die Erfindung betrifft ein Verfahren zum Herstellen von Formteilen, in deren Innenraum ein Medium eingebracht wird, insbesondere zum Herstellen von Kernbüchsen bzw. Kernkästen zum Kernschießen, wobei Be- und/oder Entlüftungsöffnungen in dem Formraum vorgesehen und mit beispielsweise Düsen belegt werden.The invention relates to a process for the production of molded parts, in the interior of which a medium is introduced, in particular for the production of core boxes or core boxes for core shooting, ventilation and / or ventilation openings being provided in the molding space and being occupied, for example, with nozzles.
Die hier vorliegende Erfindung bezieht sich zwar vor allem auf die Herstellung einer Kernbüchse, in welcher ein Kern aus einer entsprechenden Kernsandmischung erzeugt wird, sie kann jedoch ebenso bei anderen ähnlichen Verfahren Anwendung finden.
Ein wichtiges Kriterium für optimale Kernsandmischungen ist neben guter Oberfläche des Gusses und Standfestigkeit des Kernes bis zum Gießen der gute Zerfall des Formlings nach dem Gießen. Diese Eigenschaft beeinflußt wesentlich den Putzaufwand am Gußrohling. Anzustreben sind deshalb Kernformstoffmischungen, die als Kerne nach dem Gießen möglichst viel ausgebrannte Formstoffmenge zeigen (Ablösen von der Guflstückinnenwandung) und einen schnellen Restkδrperzerfall aus dem Gußstück beim Ausrütteln garantieren.Although the present invention relates above all to the production of a core box in which a core is produced from a corresponding core sand mixture, it can also be used in other similar processes. An important criterion for optimal core sand mixtures is not only the good surface of the casting and the stability of the core until casting, but also the good disintegration of the molded part after casting. This property significantly affects the cleaning effort on the cast blank. Core molding material mixtures should therefore be aimed for, which, as cores, show as much burned-out amount of molding material as possible after the casting (detachment from the inner wall of the sleeve) and guarantee a rapid disintegration of the residual body from the casting when shaken out.
Für die Herstellung von Sandkernen nach den verschiedenen Kernherstellungsverfahren sind eine Anzahl moderner leistungsfähiger Kernschießmaschinen auf dem Markt. Bekannte Kernherstellungsverfahren sindThere are a number of modern, powerful core shooters on the market for the production of sand cores according to the various core manufacturing processes. Known core manufacturing processes are
- das Maskenform-Verfahren (Croning-Verfahren)- the mask molding process (croning process)
- das hot-box-Verfahren- the hot box process
- das cold-box-Verfahren- the cold box process
- das Kohlesäure-Erstarrungs-Verfahren und- the carbonation process and
- das SO2-Verfahren.- the SO 2 process.
In jedem dieser Verfahren ist es notwendig, daß beim Einbringen der Sandmischung für den Kern Entlüftungsöffnungen da sind, aus welchen die Luft, die der Kernbildung Platz machen muß, entweichen kann. In einigen weiteren Verfahren wird auch nach der Kernherstellung dieser mit beispielsweise Kohlensäure, einem Katalysatornebel oder SO2 gespült, um beispielsweise seine Aushärtung zu bewirken.
Die entsprechenden Bohrungen zum Entlüften bzw. die Bohrungen zum Einlassen des Spülmediums sind heute in der Regel mit Düsen belegt, welche gitterförmige Schlitze oder kleine Löcher aufweisen. Die entsprechenden Ausnehmungen für die Düsen werden heute in der Regel gebohrt, was zusätzliche Arbeitsgänge notwendig macht. Da eine Kernbüchse bis zu 100 und mehr Düsen aufweisen kann, damit beispielsweise der Kern überall ordnungsgemäß entlüftet wird bzw. Sand auch in ungünstige Positionen fließen kann oder die Kernbüchse mit guter und gleichmäßiger Verdichtung gefüllt wird, ist dieser nachträgliche Arbeitsgang sehr aufwendig.In each of these processes it is necessary that when the sand mixture is introduced for the core there are ventilation openings from which the air which has to make room for the core formation can escape. In some other processes, even after the core has been produced, it is rinsed with, for example, carbonic acid, a catalyst mist or SO 2 , in order, for example, to cause it to harden. The corresponding bores for venting or the bores for letting in the flushing medium are usually occupied today with nozzles which have grid-shaped slots or small holes. The corresponding recesses for the nozzles are usually drilled today, which makes additional operations necessary. Since a core box can have up to 100 or more nozzles, so that, for example, the core is properly ventilated everywhere or sand can flow in unfavorable positions or the core box is filled with good and even compression, this subsequent operation is very complex.
Der Erfinder hat sich zum Ziel gesetzt, ein Verfahren der oben genannten Art zu entwickeln, mittels welchem dieser Nachteil beseitigt wird und damit das Herstellen der Kernbüchsen wesentlich erleichtert und somit verbilligt wird.The inventor has set itself the goal of developing a method of the type mentioned above, by means of which this disadvantage is eliminated and thus the manufacture of the core sleeves is made considerably easier and thus cheaper.
Zur Lösung dieser Aufgabe führt, daß beim Formen des Formteils (Seele), insbesondere der Kernbüchse, zumindest ein Einsatz eingesetzt wird, dessen Form der Düse entspricht, und dieser Einsatz nach dem Formen der Kernbüchse entfernt und durch die Düse ersetzt wird.To achieve this object, at least one insert is used in the molding of the molded part (core), in particular the core sleeve, the shape of which corresponds to the nozzle, and this insert is removed after the core sleeve is shaped and replaced by the nozzle.
Es handelt sich somit im vorliegenden Fall quasi um ein Double für die Düse, das nur bei der Herstellung der Kernbüchse selbst Verwendung findet. Danach wird es entfernt und durch die eigentliche Düse ersetzt.In the present case, it is a quasi double for the nozzle, which is only used in the manufacture of the core sleeve itself. Then it is removed and replaced by the actual nozzle.
Bei dem Einsatz kann es sich in Anwendungsfällen um beispielsweise ein Material handeln, das sich selbst auf löst . Vorzugsweise ist jedoch daran gedacht , den Einsatz aus Kunststoff oder bedingt aus Metall herzustellen.
Zum Entfernen des Einsatzes ist vorgesehen, daß dieser an eine Druckleitung angeschlossen ist, welche später als Entlüftungsschlauch verwendet werden kann. Wird die Druckleitung unter den Druck eines Druckmediums gesetzt, so wird der Einsatz aus seinem Sitz herausgeschossen, so daß ohne weiteres die Düsen eingesetzt werden kann.In use cases, the application can be, for example, a material that dissolves itself. However, it is preferably contemplated to manufacture the insert from plastic or, to a limited extent, from metal. To remove the insert, it is provided that it is connected to a pressure line, which can later be used as a ventilation hose. If the pressure line is placed under the pressure of a pressure medium, the insert is shot out of its seat so that the nozzles can be inserted without further ado.
Ferner ist auch daran gedacht, den Einsatz aus seinem Sitz herauszuschlagen, wobei im Rahmen der Erfindung dieser Einsatz eine Anformung besitzt.Furthermore, it is also contemplated to knock the insert out of its seat, this insert being molded in the context of the invention.
In einem weiteren Ausführungsbeispiel der Erfindung ist daran gedacht, daß der Einsatz eine stirnseitige Sacklσchbohrung mit einem Innengewinde besitzt, in das ein entsprechender Stift eingedreht werden kann und mittels dieses Stiftes der Einsatz aus seinem Sitz gezogen wird.In a further embodiment of the invention, it is contemplated that the insert has a blind bore on the end face with an internal thread, into which a corresponding pin can be screwed and the insert is pulled out of its seat by means of this pin.
Die vorübergehende Befestigung des Einsatzes an der Seele od. dgl. geschieht durch Anleben mit Sekundenkleber oder in manchen Verwendungszwecken auch selbstklebend.The temporary attachment of the insert to the soul or the like. Is done by sticking with super glue or in some cases also self-adhesive.
Sowohl das Verfahren wie auch der erfindungsgemäße Einsatz können auch bei anderen Herstellungsverfahren Anwendung finden, bei denen Formteile hergestellt werden. Dabei kann es sich hier auch um Keramikteile oder um gießbaren oder schäumbaren Kunststoff und Gießmassen handeln.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigt inBoth the method and the use according to the invention can also be used in other production processes in which molded parts are produced. These can also be ceramic parts or pourable or foamable plastic and casting compounds. Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing; this shows in
Fig. 1 eine schematische Darstellung einer Methode zum Herstellen von Formen und Kernen;Figure 1 is a schematic representation of a method for producing molds and cores.
Fig. 2 eine vergrößert dargestellte Draufsicht auf einen erfindungsgemäßen Einsatz;2 shows an enlarged plan view of an insert according to the invention;
Fig. 3 eine Seitenansicht eines weiteren Ausführungsbeispiels eines erfindungsgemäßen Einsatzes;3 shows a side view of a further exemplary embodiment of an insert according to the invention;
Fig. 4 eine Stirnansicht des Einsatz nach Fig. 3.4 shows an end view of the insert according to FIG. 3.
In Figur 1 ist schematisch das sogenannte cold-bσx-Verfahren dargestellt, welches auch als Gas-Nebel-Verfahren bezeichnet wird. In einem Kernkasten 1 bzw. einer Kernbüchse aus Oberteil 2 und Unterteil 3 befindet sich ein Kern 5, welcher darin geformt wird. Das Formen kann auch in einer entsprechenden eingelegten Seele erfolgen.FIG. 1 schematically shows the so-called cold-bσx process, which is also referred to as the gas-fog process. A core 5, which is formed therein, is located in a core box 1 or a core sleeve composed of the upper part 2 and lower part 3. The shaping can also take place in a corresponding inlaid soul.
Dem Kernkasten 1 ist ein Schießkopf 6 einer nicht näher gezeigten Kernschießmaschine zugeordnet, wobei über entsprechende Einschußlöcher 7 eine geeignete Sandmischung, beispielsweise trockener Quarzsand und flüssiger Zweikomponenten-Binder, eingeschossen wird. Danach gelangt der Kernkasten 1 in eine weitere Station 8, in welcher er von einer nur schematisch dargestellten Kammer 9 aufgenommen wird.
Dieser Kammer 9 wird über eine Leitung 10 ein Gemisch aus Luft und flüssigem Katalysator zugeleitet, wobei Luft und flüssiger Katalysator in einer Sprühdüse 11 miteinander vermischt werden. Im vorliegenden Ausführungsbeispiel gelangt Luft entsprechend dem Pfeil 12 und Katalysator entsprechend dem Pfeil 13 zur Sprühdüse 11. Hierdurch findet ein Aushärten der Sandmischung statt.The core box 1 is assigned a shooting head 6 of a core shooting machine (not shown in more detail), a suitable sand mixture, for example dry quartz sand and liquid two-component binder, being shot in via appropriate bullet holes 7. The core box 1 then arrives in a further station 8, in which it is received by a chamber 9, which is only shown schematically. A mixture of air and liquid catalyst is fed to this chamber 9 via a line 10, air and liquid catalyst being mixed with one another in a spray nozzle 11. In the present exemplary embodiment, air according to arrow 12 and catalyst according to arrow 13 reach spray nozzle 11. This causes the sand mixture to harden.
Damit jedoch die Kernbüchse 1 ausreichend mit dem entsprechenden Katalysatornebel versorgt wird, sind in der Regel zum Kern 5 hin Düsen 19 vorgesehen, wobei in jeder Kernbüchse sogar bis zu 100 und mehr solcher Düsen 19 vorgesehen sein können. Diese Düsen 19 dienen zum besseren Verteilen des Katalysatornebels. Sie dienen aber auch zum Entlüften beispielsweise durch die entsprechenden Entlüftungsbohrungen 14.However, to ensure that the core sleeve 1 is adequately supplied with the corresponding catalyst mist, nozzles 19 are generally provided toward the core 5, it being possible for up to 100 or more such nozzles 19 to be provided in each core sleeve. These nozzles 19 serve to better distribute the catalyst mist. However, they also serve for venting, for example through the corresponding vent holes 14.
Im cold-box-Verfahren gelangt dann der Katalysatornebel durch eine Abluftleitung 15 in einen Behälter 16 mit Reinigungsflüssigkeit 17. Der gereinigte Nebel kann dann wie durch die Pfeile 18 in die Atmosphäre entweichen.In the cold box process, the catalyst mist then passes through an exhaust air line 15 into a container 16 with cleaning liquid 17. The cleaned mist can then escape into the atmosphere as indicated by the arrows 18.
Nach dem Formen der Kernbüchse 1, jedoch vor dem Befüllen, müssen die Düsen 19 in die Kernbüchse 1 eingesetzt werden. Um deren Einsatz zu erleichtern, werden in die herzustellende Kernbüchse 1 bzw. an die Kernseele Einsätze 20 plaziert oder geklebt, welche in ihren Abmessungen den Düsen 19 entsprechen.
In dem in Figur 2 gezeigten Ausführungsbeispiel ist der Einsatz 20 an eine Druckluftleitung 21 angeschlossen. Zum Entfernen des Einsatzes 20 wird über die Druckluftleitung 21 Druckluft zugeführt und so dieser Einsatz 20 quasi aus seinem Sitz in der Kernbüchse herausgeschossen.After the core sleeve 1 has been shaped, but before it is filled, the nozzles 19 must be inserted into the core sleeve 1. In order to facilitate their use, inserts 20 are placed or glued into the core sleeve 1 to be produced or to the core core, the dimensions of which correspond to the nozzles 19. In the exemplary embodiment shown in FIG. 2, the insert 20 is connected to a compressed air line 21. To remove the insert 20, compressed air is supplied via the compressed air line 21 and this insert 20 is thus virtually shot out of its seat in the core sleeve.
In Figur 3 ist ein weiteres Ausführungsbeispiel eines Einsatzes 20a gezeigt, welcher eine Anformung 22 besitzt. In Gebrauchsläge steht diese Anformung 22 im inneren Bereich der Kernbüchse 1 von der geformten Innenwandung hervor, so daß der Einsatz 20a mit einem geeigneten Werkzeug herausgezogen oder aus seinem Sitz herausgeschlagen werden kann.FIG. 3 shows a further exemplary embodiment of an insert 20a which has a molded part 22. In the position of use, this projection 22 protrudes from the formed inner wall in the inner region of the core sleeve 1, so that the insert 20a can be pulled out with a suitable tool or knocked out of its seat.
Figur 3 zeigt aber auch noch eine andere Variationsmöglichkeit, wobei die Anformung 22 nicht vorhanden sein muß. In diesem dritten Ausführungsbeispiel eines Einsatzes 20b besitzt dieser dann in seiner Stirnfläche 23 eine Sacklochbohrung 24, welche ein Innengewinde 25 besitzt. In diese Sacklochbohrung 24 kann nun eine entsprechende Gewindestange eingeschraubt und so der Einsatz 20b aus seinem Sitz herausgezogen werden.
However, FIG. 3 also shows another possible variation, in which case the molding 22 does not have to be present. In this third exemplary embodiment of an insert 20b, it then has a blind hole 24 in its end face 23, which has an internal thread 25. A corresponding threaded rod can now be screwed into this blind hole 24 and the insert 20b can thus be pulled out of its seat.
Claims
1. Verfahren zum Herstellen von Formteilen, in deren Innenraum ein Medium eingebracht wird, insbesondere zum Herstellen von Kernbüchsen bzw. Kernkästen zum Kernschießen, wobei Be- und/oder Entlüftungsδffnungen in dem Formraum vorsehen und mit beispielsweise Düsen belegt werden,1. A process for the production of molded parts, in the interior of which a medium is introduced, in particular for the production of core boxes or core boxes for core shooting, ventilation and / or ventilation openings being provided in the mold space and being occupied, for example, with nozzles,
dadurch gekennzeichnet,characterized,
daß beim Formen des Formteils bzw. einer im Formteil angeordneten Seele, insbesondere der Kernbüchse, zumindest ein Einsatz eingesetzt wird, dessen Form der Düse entspricht und dieser Einsatz nach dem Formen der Kernbüchse entfernt und durch die Düse ersetzt wird.that when molding the molded part or a core arranged in the molded part, in particular the core sleeve, at least one insert is used, the shape of which corresponds to the nozzle and this insert is removed after the core sleeve has been formed and replaced by the nozzle.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Einsatz eingeklebt wird.2. The method according to claim 1, characterized in that the insert is glued in.
3. Einsatz zur Durchführung des Verfahrens nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Einsatz (20) an eine Druckleitung (21) angeschlossen ist.3. Use for performing the method according to claim 1 or 2, characterized in that the insert (20) is connected to a pressure line (21).
4. Einsatz nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß der Einsatz (20a) eine Anformung (22) aufweist.4. Insert according to claim 2 or 3, characterized in that the insert (20a) has an integrally formed part (22).
5. Einsatz nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Einsatz (20b) eine stirnseitige Sacklochbohrung (24) mit einem Innengewinde (25) besitzt. 5. Insert according to one of claims 2 to 4, characterized in that the insert (20b) has an end blind bore (24) with an internal thread (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89901708T ATE74300T1 (en) | 1988-02-02 | 1989-01-30 | PROCESS FOR MAKING MOLDED PARTS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3802970 | 1988-02-02 | ||
| DE3802970A DE3802970A1 (en) | 1988-02-02 | 1988-02-02 | METHOD FOR PRODUCING MOLDED PARTS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0359786A1 true EP0359786A1 (en) | 1990-03-28 |
| EP0359786B1 EP0359786B1 (en) | 1992-04-01 |
Family
ID=6346413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89901708A Expired - Lifetime EP0359786B1 (en) | 1988-02-02 | 1989-01-30 | Process for making moulded parts |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5056580A (en) |
| EP (1) | EP0359786B1 (en) |
| CA (1) | CA1338547C (en) |
| DE (2) | DE3802970A1 (en) |
| WO (1) | WO1989007024A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7681576B2 (en) * | 2003-05-06 | 2010-03-23 | Mallinckrodt Inc. | Multiple cannula systems and methods |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU121759A1 (en) * | 1958-12-01 | 1959-11-30 | П.И. Буковский | The method of degenerating brewer's yeast |
| US3099868A (en) * | 1960-10-10 | 1963-08-06 | Howe Sound Co | Method for manufacturing cast welding rods |
| GB1269202A (en) * | 1968-02-14 | 1972-04-06 | Fordath Ltd | Improvements in the production of cores for use in the production of metal castings |
| DE1965121A1 (en) * | 1969-12-27 | 1971-07-01 | Continental Gummi Werke Ag | Rubber vulcanizing mould with air relief - channels |
| US3888293A (en) * | 1973-04-20 | 1975-06-10 | American Motors Corp | Method of making a foundry core |
| FR2232376A1 (en) * | 1973-06-05 | 1975-01-03 | Scholler Andre | Injecting catalyst gas into moulding boxes - using jet-pipes which penetrate moulding sand |
| DE2516997A1 (en) * | 1975-04-17 | 1976-10-28 | Gottfried Zimmermann | Vents for foundry moulds or dies used in plastic moulding - where only part of the outer periphery of the vert is knurled |
| JPS5514183A (en) * | 1978-07-17 | 1980-01-31 | Nippon Gakki Seizo Kk | Molding method of casting mold |
| US4284288A (en) * | 1979-09-24 | 1981-08-18 | Fulton Roger G | Folding bicycle structure |
| JPS579559A (en) * | 1980-06-19 | 1982-01-19 | Takaoka Kogyo Kk | Production of mold |
| DE3026146C2 (en) * | 1980-07-10 | 1984-09-13 | Gottfried 6335 Lahnau Zimmermann | Nozzle for venting, aerating, steaming or spraying molds |
| US4467855A (en) * | 1981-11-12 | 1984-08-28 | Sintokogio Ltd. | Method of making mold |
| US4540531A (en) * | 1984-05-04 | 1985-09-10 | Ashland Oil, Inc. | Vapor generator and its use in generating vapors in a pressurized gas |
| FR2566687B1 (en) * | 1984-06-27 | 1986-08-22 | Air Liquide | DEVICE FOR MANUFACTURING FROZEN MOLDS OR MOLDING CORES |
-
1988
- 1988-02-02 DE DE3802970A patent/DE3802970A1/en not_active Withdrawn
-
1989
- 1989-01-30 WO PCT/DE1989/000049 patent/WO1989007024A1/en active IP Right Grant
- 1989-01-30 US US07/427,832 patent/US5056580A/en not_active Expired - Fee Related
- 1989-01-30 EP EP89901708A patent/EP0359786B1/en not_active Expired - Lifetime
- 1989-01-30 DE DE8989901708T patent/DE58901081D1/en not_active Expired - Lifetime
- 1989-02-01 CA CA000589808A patent/CA1338547C/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8907024A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1338547C (en) | 1996-08-27 |
| WO1989007024A1 (en) | 1989-08-10 |
| DE58901081D1 (en) | 1992-05-07 |
| US5056580A (en) | 1991-10-15 |
| EP0359786B1 (en) | 1992-04-01 |
| DE3802970A1 (en) | 1989-08-10 |
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