DE832935C - Process for the production of foundry molds or foundry cores - Google Patents
Process for the production of foundry molds or foundry coresInfo
- Publication number
- DE832935C DE832935C DE1948P0013957 DEP0013957D DE832935C DE 832935 C DE832935 C DE 832935C DE 1948P0013957 DE1948P0013957 DE 1948P0013957 DE P0013957 D DEP0013957 D DE P0013957D DE 832935 C DE832935 C DE 832935C
- Authority
- DE
- Germany
- Prior art keywords
- foundry
- molding material
- synthetic resin
- production
- molds
- 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
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/165—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents in the manufacture of multilayered shell moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C23/00—Tools; Devices not mentioned before for moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
(WiGBL S. 175)(WiGBL p. 175)
AUSGEGEBEN AM 3. MÄRZ 1952ISSUED MARCH 3, 1952
P i3957VIa/3ic DP i3957VIa / 3ic D
Die Erfindung betrifft ein Verfahren zur Herstellung von Gießereiformen oder Gießereikernen unter Verwendung von Kunstharz und besteht darin, daß die zur Erzielung der Plastizität des Formstoffes erforderliche Wärme dem Formstoff unmittelbar vor dem Auftragen auf das Modell zugeführt wird.The invention relates to a method for producing foundry molds or foundry cores using synthetic resin and consists in that the to achieve the plasticity of the Molding material required heat supplied to the molding material immediately before application to the model will.
Die Herstellung von Formen und Kernen für Gießereizwecke unter Verwendung von Sand und Kunstharz ist bekannt. Das Sand-Kunstharz-Gemisch muß dabei auf stark erhitzte Modellplatten und Modelle bzw. in entsprechend erhitzte Kernkasten geschüttet werden. Das in dem Formstoff befindliche Kunstharz erweicht, bindet dadurch den Sand und erhärtet unter dem Einfluß der hohen Temperatur der Modelle bzw. Kernkästen. Die nach diesem Verfahren hergestellten Formstücke müssen häufig noch in einem Härteofen ausgehärtet werden.The manufacture of molds and cores for foundry purposes using sand and Synthetic resin is known. The sand-synthetic resin mixture must be placed on strongly heated model plates and models or in appropriately heated core boxes be poured. The synthetic resin in the molding material softens, thereby binding the Sand and hardens under the influence of the high temperature of the models or core boxes. the Moldings produced according to this process often have to be hardened in a hardening furnace will.
Dieses Verfahren besitzt jedoch abgesehen von anderen kleineren Nachteilen den sehr unangenehmen Nachteil, daß das Trockengemisch von Sand und Kunstharz auf Einzelmodelle, die meistens aus Holz oder Gips hergestellt werden, nicht anwendbar ist, weil Modelle und Kernkasten aus diesen Materialien nicht auf die Aushärtetemperatur des Kunstharzes gebracht werden können, ohne vorher zerstört zu sein.However, apart from other minor disadvantages, this method has the very inconvenient one Disadvantage that the dry mixture of sand and synthetic resin on individual models, which mostly consist of Wood or plaster of paris is not applicable because models and core boxes are made from them Materials cannot be brought to the curing temperature of the synthetic resin without first to be destroyed.
Dieser Übelstand wird nun gemäß dem erfindungsgemäßen Verfahren dadurch beseitigt, daß die zur Erzielung der Plastizität des Formstoffes erforderliche Wärme dem Formstoff unmittelbar vor dem Auftragen auf das Modell zugeführt wird. Da nunmehr Modelle und Kernkästen nicht mehr erhitztThis drawback is now eliminated according to the method according to the invention in that the for Achieving the plasticity of the molding material required heat the molding material immediately before Applying to the model is fed. Since models and core boxes are no longer heated
werden brauchen, ist die Verwendung eines Sand-Kiuistharz-Gemisches auch bei solchen Modellen und Kernkasten möglich, die keine höheren Temperaturen vertragen können.is the use of a sand-synthetic resin mixture also possible with models and core boxes that do not have higher temperatures can tolerate.
Zur Ausführung des Verfahrens ist lediglich erforderlich, daß der Formstoff in geeigneter Weise gefördert und aufgetragen wird. Vorteilhaft wird der Formstoff strahlenförmig geleitet; er kann dabei einem über dem Arbeitsplatz angeordneten Behälter entnommen und durch sein Gewicht in geeigneter Weise dem Modell zugeführt werden, kann aber auch mit Hilfe von Preßluft durch eine Düse geleitet werden, wie dieses von den Sandstrahlgebläsen her bekannt ist.To carry out the process it is only necessary that the molding material is in a suitable manner is promoted and applied. The molding material is advantageously directed radially; he can do it taken from a container arranged above the workplace and in a suitable container due to its weight Way to be fed to the model, but can also be done with the help of compressed air through a nozzle be conducted, as is known from the sandblasting blower.
Als Wärmeträger kann beispielsweise die Preßluft dienen, die sich bekanntlich erst hinter der Düse mit dem zu fördernden Material vereinigt und dadurch den Formstoff erst'kurz vor dem Auftragen auf das Modell plastisch werden läßt. Es kann jedoch auch der Sand als Wärmeträger dienen, wenn Sand und Kunstharz getrennten Behältern entnommen werden und die Mischung beider Materialien erst kurz vor dem Auftragen zu einejn gemeinsamen Materialstrom vereinigt werden. Endlich kann man auch beide, nämlich sowohl den Sand als auch die Preßluft, als Wärmeträger verwenden. Dann muß allerdings der eine der beiden Wärmeträger lediglich zum Vorwärmen und der andere als Träger der hohen Temperatur, die das Kunstharz plastisch werden läßt, verwendet werden.As a heat transfer medium, for example, the compressed air, which is known to be only behind the The nozzle is combined with the material to be conveyed and thus the molding material only shortly before application can become plastic on the model. However, it can the sand also serve as a heat transfer medium when sand and synthetic resin are taken from separate containers and the mixture of the two materials only becomes one joint shortly before application Material flow are combined. Finally you can do both, namely both the sand and the Use compressed air as a heat transfer medium. Then, however, one of the two heat carriers only has to be for preheating and the other as a carrier of the high temperature that plasticizes the synthetic resin can be used.
In der Hauptsache wird man bei dem strahlenförmigen Auftragen den einfachen Rundstrahl verwenden. Es kann jedoch auch an die Stelle des einfachen Rundstrahles für besondere Zwecke ein Flachstrahl oder eine brauseartige Verteilung des Formmaterials treten. Dabei können auch mehrere Formstoffstrahlen oder Brausen gleichzeitig auf ein oder mehrere Modelle aufgetragen werden.The main thing is to use the simple round jet for the radial application. However, it can also take the place of the simple omnidirectional jet for special purposes A flat jet or a shower-like distribution of the molding material occurs. There can also be several Molding material jets or showers can be applied to one or more models at the same time.
Wichtig ist lediglich, daß das Erhitzen des Kunst-It is only important that the heating of the art
♦o harzanteils und das Auftragen des Formstoffes unmittelbar aufeinanderfolgen sowie miengengleioh und fortlaufend geschehen. Der so aufgebrachte Formstoff verliert seine. Plastizität bei der Berührung mit dem kalten Modell und erhärtet augenblicklich, so daß die Modelle sofort aus der Form herausgenommen werden können. Die Widerstandsfähigkeit der Form kann durch Nachhärten in einem geeigneten Härteofen noch erhöht werden.♦ o resin content and the application of the molding material immediately successive as well as miengengleioh and happen continuously. The so upset Molding material loses its. Plasticity when in contact with the cold model and hardens instantly, so that the models can be removed from the mold immediately. The resilience the shape can be increased by post-curing in a suitable curing oven.
Kerne können nach dem Verfahren sinngemäß hergestellt werden, wenn die beiden Kernkastenhalf ten offen dem Gerät zum Auftragen des Materials zugekehrt sind und die so entstandenen Kernhälften nachträglich'in bekannter Weise vereinigt werden.Cores can be produced according to the method if the two core boxes helped th are open facing the device for applying the material and the resulting core halves subsequently be combined in a known manner.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1002161T | 1946-08-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE832935C true DE832935C (en) | 1952-03-03 |
Family
ID=9561895
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1948P0013957 Expired DE832935C (en) | 1946-08-06 | 1948-10-02 | Process for the production of foundry molds or foundry cores |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE832935C (en) |
FR (1) | FR1002161A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2803859A (en) * | 1955-04-12 | 1957-08-27 | Lebanon Steel Foundry | Method and apparatus for making lightweight molds |
DE1058225B (en) * | 1952-06-30 | 1959-05-27 | Deutsche Edelstahlwerke Ag | Turnstile forming machine for the independent production of shaped masks |
DE972650C (en) * | 1953-05-08 | 1959-08-27 | Knapsack Ag | Process for the production of protective coatings by means of powdery fusible substances |
DE1190144B (en) * | 1957-02-01 | 1965-04-01 | Gen Motors Corp | Hardening of shell molds for metal casting |
DE1247560B (en) * | 1962-05-17 | 1967-08-17 | Nat Acme Co | Machine for the production of pot cores |
DE1280494B (en) * | 1960-02-13 | 1968-10-17 | Renault | Permanent mold for metal casting |
DE4033888A1 (en) * | 1990-10-25 | 1992-04-30 | Hottinger Adolf Masch | METHOD AND DEVICE FOR SAND MASK PRODUCTION |
-
1946
- 1946-08-06 FR FR1002161D patent/FR1002161A/en not_active Expired
-
1948
- 1948-10-02 DE DE1948P0013957 patent/DE832935C/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1058225B (en) * | 1952-06-30 | 1959-05-27 | Deutsche Edelstahlwerke Ag | Turnstile forming machine for the independent production of shaped masks |
DE972650C (en) * | 1953-05-08 | 1959-08-27 | Knapsack Ag | Process for the production of protective coatings by means of powdery fusible substances |
US2803859A (en) * | 1955-04-12 | 1957-08-27 | Lebanon Steel Foundry | Method and apparatus for making lightweight molds |
DE1190144B (en) * | 1957-02-01 | 1965-04-01 | Gen Motors Corp | Hardening of shell molds for metal casting |
DE1280494B (en) * | 1960-02-13 | 1968-10-17 | Renault | Permanent mold for metal casting |
DE1247560B (en) * | 1962-05-17 | 1967-08-17 | Nat Acme Co | Machine for the production of pot cores |
DE4033888A1 (en) * | 1990-10-25 | 1992-04-30 | Hottinger Adolf Masch | METHOD AND DEVICE FOR SAND MASK PRODUCTION |
Also Published As
Publication number | Publication date |
---|---|
FR1002161A (en) | 1952-03-03 |
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