EP0017902A1 - Process for producing a refractory foundry mould - Google Patents
Process for producing a refractory foundry mould Download PDFInfo
- Publication number
- EP0017902A1 EP0017902A1 EP19800101883 EP80101883A EP0017902A1 EP 0017902 A1 EP0017902 A1 EP 0017902A1 EP 19800101883 EP19800101883 EP 19800101883 EP 80101883 A EP80101883 A EP 80101883A EP 0017902 A1 EP0017902 A1 EP 0017902A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shell
- model
- sand
- quartz sand
- quartz
- 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
- 238000000034 method Methods 0.000 title claims abstract description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000006004 Quartz sand Substances 0.000 claims abstract description 18
- 239000004576 sand Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000005266 casting Methods 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims abstract description 7
- 239000010453 quartz Substances 0.000 claims abstract description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 3
- 239000011707 mineral Substances 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims abstract 6
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract 2
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 239000012778 molding material Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 3
- 231100000331 toxic Toxicity 0.000 claims description 3
- 230000002588 toxic effect Effects 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 238000009415 formwork Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- 239000003110 molding sand Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding
Definitions
- the invention relates to a method for producing a refractory foundry mold, wherein an air pressure difference between the model and the sand or, if applicable, the core box is used for molding the sand onto the model and / or for sand compaction.
- the object on which the invention is based is to create a method in which the difficulties described above are avoided and thus the possibility of optimum dimensional accuracy and shape accuracy of foundry molds with improved compression of the molding material in the area of the model is created.
- the action of the pressure difference on the model surface compresses a free-flowing quartz sand, quartz material or a similar refractory material, the grains of which are encased in an organic or inorganic material, so that the highest possible uniformity of the mold hardness and, as far as possible, a strength compensation moment of the subsequent cast the molten metal is guaranteed.
- the excess quartz sand is removed from the back of the compacting shell and the shell is backfilled with conventional molding material to create a foundry mold with great strength.
- the excess quartz sand can be removed in any way.
- this is done by tilting the mold or core box at 180 0 angle.
- the consolidation of the rear Filling can be done in any way, as the shell is supported on the model.
- the compression is also carried out in a favorable manner by means of an air pressure difference, since all gases and vapors flowing out of the sand can thereby be extracted.
- Another significant advance of the invention is that throughout The process up to the separation of the foundry mold from the model is sucked out of the molded item air, at the same time the toxic or non-toxic gases formed during the hardening process are sucked off and can thereby be kept away from the work place. A harassment and danger to the working personnel is thus prevented.
- 1 denotes a foundry model, which is preferably provided in the transition area from the model to the flat plate with suction openings 2, which in the simplified representation are only hinted at.
- the model 1 is arranged on a heated plate 3, on the back of which there is a space 4 which is connected to the suction openings 2.
- a molding box 5 is placed on the device, which is filled with a free-flowing quartz sand, quartz material or similar refractory, mineral material 6.
- the plate 3 is heated before or during the filling of the molding box 5 surrounding the model 1.
- a pressure difference between the surface of the model 1 and the free-flowing quartz sand 6 is generated by creating a negative pressure in the space 4, while atmospheric pressure prevails on the surface of the quartz sand.
- the negative pressure in the space 4 can also be increased by an excess pressure on the surface of the quartz sand 6.
- a hard and plastic shell 7 forms on the surface of the model 1, from which the excess quartz sand 6 is removed by tilting the entire device by approximately 180 ° while maintaining a pressure difference.
- This hard shell 7 is, as further shown in FIG. 4, backfilled with a conventional molding material 8, for example wet casting molding sand, this backfilling 8 in turn being compressed by the action of a differential pressure between the surface of the model 1 and the backfilling becomes.
- This pressure differential compression of the backfill can also be supplemented by mechanical compression, not shown.
- an overpressure is created in the space 4, which leads to the separation of the shell 7 together with the backfill 8 from the model 1.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer feu.erfesten Gießereiform, wobei zum Anformen des Sandes an das Modell und/ oder zur Sandverdichtung eine Luftdruckdifferenz zwischen Modell und Sand bzw. ggfs. Kernkasten angewendet wird.The invention relates to a method for producing a refractory foundry mold, wherein an air pressure difference between the model and the sand or, if applicable, the core box is used for molding the sand onto the model and / or for sand compaction.
Bei einem bekannten Verfahren der im Oberbegriff des Anspruchs 1 aufgeführten Gattung (DE-OS 26 09 274) wird zur Herstellung von Sandformen oder Sandkernen das gesamte in Form- bzw. Kernkasten eingebrachte Sandvolumen durch Einwirkung einer zwischen mindestens zwei verschiedenen Stellen des Form- bzw. Kernkastenhohlraumes wirksamen Luftdruckdifferenz verdichtet. Bei komplizierten Formteilen mit feinen Konturen reicht dieses Verfahren nicht aus,um den hohen Anforderungen auf Formtreue gerecht zu werden. Außerdem ist für den unter Umständen mit einem Kunstharzbinder durchsetzten Formsand ein relativ langer Zeitraum für die Aushärtung der Gießereiformen erforderlich, während der ein thermischer Verzug der Formhälften unvermeidbar ist. Diese Aushärtung des Formsandes geschieht häufig durch Erwärmung der Gießereiform, die zur Bildung von toxischen bzw. atoxischen Gasen mit erheblicher Geruchsbelästigung und Gesundheitsbelastung für das in Gießereien und Formereien tätige Personal führen.In a known method of the type listed in the preamble of claim 1 (DE-OS 26 09 274) for the production of sand molds or sand cores, the entire sand volume introduced into the mold or core box by the action of between at least two different places of the mold or Core box cavity compressed air pressure difference. In the case of complicated molded parts with fine contours, this process is not sufficient to meet the high requirements for shape accuracy. In addition, the molding sand, which may be interspersed with a synthetic resin binder, requires a relatively long time for the foundry molds to harden, during which thermal distortion of the mold halves is unavoidable. This hardening of the molding sand often takes place by heating the foundry mold, which leads to the formation of toxic or atoxic gases with considerable odor nuisance and health problems for the personnel working in foundries and molding shops.
Die der Erfindung zugrundeliegende Aufgabe besteht darin, ein Verfahren zu schaffen, bei dem die vorstehend beschriebenen Schwierigkeiten vermieden werden und somit die Möglichkeit einer optimalen Maßhaltigkeit und Formtreue an Gießereiformen bei verbesserter Verdichtung des Formmaterials im Bereich des Modells zu schaffen.The object on which the invention is based is to create a method in which the difficulties described above are avoided and thus the possibility of optimum dimensional accuracy and shape accuracy of foundry molds with improved compression of the molding material in the area of the model is created.
Diese Aufgabe wird bei einem Verfahren der in Rede stehenden Gattung durch die im Kennzeichen des Anspruchs 1 aufgeführten Merkmale gelöst.This object is achieved in a method of the type in question by the features listed in the characterizing part of
Danach wird durch die Einwirkung der Druckdifferenz an der Modelloberflache ein rieselfähiger Quarzsand, Quarzgut oder ein ähnlicher feuerfester Stoff, dessen Körner von einem organischen oder anorganischen Stoff umhüllt sind, verdichtet, so daß eine möglichst hohe Gleichmäßigkeit der Formhärte und damit möglichst ein Festigkeitsausgleichsmoment des späteren Abgußes der flüssigen Metallschmelze garantiert ist. Während des weiteren Verfahrensablaufs wird der überschüssige Quarzsand von der Rückseite der verdichtenden Schale entfernt und die Schale zur Schaffung einer Gießereiform mit großer Festigkeit mit üblichem Formmaterial hinterfüllt.After that, the action of the pressure difference on the model surface compresses a free-flowing quartz sand, quartz material or a similar refractory material, the grains of which are encased in an organic or inorganic material, so that the highest possible uniformity of the mold hardness and, as far as possible, a strength compensation moment of the subsequent cast the molten metal is guaranteed. During the further course of the process, the excess quartz sand is removed from the back of the compacting shell and the shell is backfilled with conventional molding material to create a foundry mold with great strength.
Die Entfernung des überschüssigen Quarzsandes kann in beliebiger Weise erfolgen. In vorteilhafter Weise geschieht dies durch Kippen des Form- bzw. Kernkastens um 1800 Winkel. Auch die Verfestigung der Hinterfüllung kann in beliebiger Weise erfolgen, da die Schale sich am Modell abstützt. In günstiger Weise erfolgt die Verdichtung ebenfalls durch eine Luftdruckdifferenz, da dadurch alle dem Sand entströmenden Gase und Dämpfe abgesaugt werden können.The excess quartz sand can be removed in any way. Advantageously, this is done by tilting the mold or core box at 180 0 angle. Also the consolidation of the rear Filling can be done in any way, as the shell is supported on the model. The compression is also carried out in a favorable manner by means of an air pressure difference, since all gases and vapors flowing out of the sand can thereby be extracted.
Entsprechend weiteren Merkmalen des erfindungsgemäßen Verfahrens wird vorgeschlagen, die Verdichtung sowohl des Formmaterials für die Schale als auch des Hinterfüllmaterials in entsprechenden Verfahrensschritten durch Einwirkung eines Unterdrucks im Bereich des Modells und Überdruck im Bereich des Sandes zu erzielen. Ist dabei, wie weiterhin vorgeschlagen, die Oberfläche des Modells beim Einschalen auf eine entsprechende Aushärtetemperatur erwärmt, so tritt durch möglichst kurzzeitige Erzeugung der Druckdifferenz eine hochverfestigte Formgebung der Schale ein, bei der auch feine Konturen des Modells mit größter Maßsicherheit übernommen werden. Auch beim anschließenden Hinterfüllen der geschaffenen Schale kann ein Unterdruck im Bereich des Modells beibehalten werden, der zu einer Verdichtung des möglicherweise benutzten Nassgußformsandes bei unter Umständen zusätzlicher mechanischer Verdichtung führt. Die Schale wird bei der Hinterfüllung auch deshalb in ihrer Form beeinflußt, weil sie weiterhin am Modell anliegt.According to further features of the method according to the invention, it is proposed to achieve the compression of both the molding material for the shell and the backfill material in corresponding method steps by the action of a negative pressure in the area of the model and positive pressure in the area of the sand. If, as further suggested, the surface of the model is heated to a corresponding curing temperature when it is formworked in, the pressure difference is generated for as short a time as possible, resulting in a highly solidified shape of the shell, in which even fine contours of the model are adopted with the greatest possible dimensional accuracy. Even when the created shell is subsequently backfilled, a negative pressure can be maintained in the area of the model, which leads to a compression of the possibly used wet casting mold sand with possibly additional mechanical compression. The shape of the shell is also influenced when backfilling because it continues to rest against the model.
Ein weiterer wesentlicher Fortschritt der Erfindung besteht darin, daß während des gesamten Verfahrens bis zur Trennung der Gießereiform von dem Modell aus dem Formgut Luft abgesaugt wird, wobei gleichzeitig die sich bei dem Härtevorgang bildenden toxischen oder atoxischen Gase abgesaugt werden und dadurch vom Arbeitsplatz ferngehalten werden können. Eine Belästigung und Gefährdung des arbeitenden Personals wird folglich verhindert.Another significant advance of the invention is that throughout The process up to the separation of the foundry mold from the model is sucked out of the molded item air, at the same time the toxic or non-toxic gases formed during the hardening process are sucked off and can thereby be kept away from the work place. A harassment and danger to the working personnel is thus prevented.
Zur weiteren Erläuterung der Erfindung wird auf die Zeichnung verwiesen, in der ein Ausführungsbeispiel des erfindungsgemäßen Verfahrens vereinfacht dargestellt ist.To further explain the invention, reference is made to the drawing, in which an embodiment of the method according to the invention is shown in simplified form.
Es zeigen:
- Fig. 1 das Modell zu Beginn des Verfahrens,
- Fig. 2 die Befüllung und anschließende Verdichtung des rieselfähigen Quarzsandes oder dergleichen am Modell,
- Fig. 3 das Entfernen nicht zur-Schale ausgehärtenden Quarzsandes und dergleichen von der Rückseite der Schale,
- Fig. 4 die Hinterfüllung der Schale mit üblichem Formmaterial und anschließende Verdichtung der Hinterfüllung und
- Fig. 5 die Entfernung des Modells aus der Gießereiform.
- 1 shows the model at the beginning of the method,
- 2 the filling and subsequent compression of the free-flowing quartz sand or the like on the model,
- 3 the removal of quartz sand and the like not hardening to the shell from the back of the shell,
- Fig. 4, the backfilling of the shell with the usual molding material and subsequent compression of the backfill and
- Fig. 5 shows the removal of the model from the foundry mold.
In den Fig. 1 bis 5 ist mit 1 ein Gießereimodell bezeichnet, das vorzugsweise im Übergangsbereich vom Modell zur ebenen Platte mit Saugöffnungen 2 versehen ist, welche in der vereinfachten Darstellung nur angedeutet sind. Außerdem ist das Modell 1 auf einer beheizten Platte 3 angeordnet, an deren Rückseite sich ein mit den Saugöffnungen 2 in Verbindung stehender Raum 4 befindet.1 to 5, 1 denotes a foundry model, which is preferably provided in the transition area from the model to the flat plate with
In Fig. 2 ist auf'die Vorrichtung ein Formkasten 5 aufgesetzt, welcher mit einem rieselfähigen Quarzsand, Quarzgut oder ähnlichem feuerfestem, mineralischem Stoff 6 gefüllt wird. Vor bzw. während des Befüllens des das Modell 1 umgeberden Formkastens 5 wird die Platte 3 erwärmt. Gleichzeitig wird eine Druckdifferenz zwischen der Oberfläche des Modells 1 und dem rieselfähigen Quarzsand 6 dadurch erzeugt, daß im Raum 4 ein Unterdruck geschaffen wird, während an der Oberfläche des Quarzsandes atmosphärischer Druck herrscht. Der Unterdruck im Raum 4 kann jedoch auch durch einen Überdruck an der Oberfläche des Quarzsandes 6 verstärkt werden.2, a
Die Folge ist, daß sich an der Oberfläche des Modells 1 eine harte und plastische Schale 7 bildet, von der der übserschüssige Quarzsand 6 unter Beibehaltung einer Druckdifferenz durch Kippen der gesamten Vorrichtung um etwa 180° entfernt wird. Diese harte Schale 7 wird, wie weiterhin in Fig. 4 dargestellt, durch ein übliches Formmaterial 8, beispielsweise Nassgußformsand, hinterfüllt, wobei diese Hinterfüllung 8 wiederum durch Einwirkung eines Differenzdruckes zwischen der Oberfläche des Modells 1 und der Hinterfüllung.8 verdichtet wird. Diese Druckdifferenzverdichtung der Hinterfüllung läßt sich auch durch eine nicht dargestellte mechanische Verdichtung ergänzen. Im weiteren Verfahrensschritt gemäß Fig. 5 wird im Raum 4 ein Überdruck geschaffen, der zur Trennung der Schale 7 gemeinsam mit der Hinterfüllung 8 vom Modell 1 führt.The result is that a hard and
Claims (8)
dadurch gekennzeichnet, daß die Verdichtung der Hinterfüllung (8), z. B. des Nassgußformsandes, ebenfalls durch Einwirkung einer Luftdruckdifferenz erfolgt.2. The method according to claim 1,
characterized in that the compression of the backfill (8), for. B. the wet casting sand, also done by the action of an air pressure difference.
dadurch gekennzeichnet, daß die Umhüllung des Quarzsandes (6) und dergleichen aus einem warmaushärtendem Material, z. B. Kunstharz, besteht und daß das Modell (1) beim Einschalen auf die entqrechende Aushärttemperatur erwärmt ist.5. The method according to any one of the preceding claims,
characterized in that the covering of the quartz sand (6) and the like made of a thermosetting material, e.g. B. synthetic resin, and that the model (1) is heated to the appropriate curing temperature when formwork.
dadurch gekennzeichnet, daß das Entfernen des nicht zur Schale (7) verfestigten umhüllten Quarzsandes (6) oder dergleichen durch Kippen des Modells (1) bzw. ggfs. des Form- (5) bzw. Kernkastens um etwa 180° erfolgt, wobei der Unterdruck im Bereich des Modells (1) aufrecht erhalten bleibt.6. The method according to any one of the preceding claims,
characterized in that the removal of the coated quartz sand (6) or the like which has not solidified to form the shell (7) is carried out by tilting the model (1) or, if appropriate, the mold (5) or core box by approximately 180 °, the vacuum is maintained in the area of the model (1).
dadurch gekennzeichnet, daß die Trennung des Modells (1) von der Schale (7) durch Erzeugung eines Überdrucks zwischen Modell (1) und Schale (7) erfolgt.7. The method according to any one of the preceding claims,
characterized in that the model (1) is separated from the shell (7) by generating an overpressure between the model (1) and the shell (7).
dadurch gekennzeichnet, daß die im Bereich des Modells (1) abgesaugte, den Unterdruck erzeugende Luft von toxischen oder atoxischen Gasen oder dergleichen befreit wird.8. Method according to one of the preceding claims,
characterized in that the air drawn off in the area of the model (1) and which generates the negative pressure is freed from toxic or atoxic gases or the like.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792916211 DE2916211C2 (en) | 1979-04-21 | 1979-04-21 | Process for making a foundry mold |
| DE2916211 | 1979-04-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0017902A1 true EP0017902A1 (en) | 1980-10-29 |
| EP0017902B1 EP0017902B1 (en) | 1983-05-18 |
Family
ID=6068934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19800101883 Expired EP0017902B1 (en) | 1979-04-21 | 1980-04-09 | Process for producing a refractory foundry mould |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0017902B1 (en) |
| JP (1) | JPS55141354A (en) |
| DE (1) | DE2916211C2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2116889A (en) * | 1982-03-23 | 1983-10-05 | Acme Conveyors & Constr | A process of moulding a metal casting mould |
| FR2724336A1 (en) * | 1994-09-14 | 1996-03-15 | Chardon Michel Georges | Fabrication of foundry moulds from binderless silica sand |
| CN104325075A (en) * | 2014-10-08 | 2015-02-04 | 柳州金茂机械有限公司 | V method casting process |
| CN113400649A (en) * | 2021-06-30 | 2021-09-17 | 山东威高骨科材料股份有限公司 | Method for solving thermal deformation of PEEK (polyetheretherketone) material part during 3D printing |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2923044C2 (en) * | 1979-06-07 | 1987-05-27 | Eugen Dipl.-Ing. 8877 Burtenbach Bühler | Method and apparatus for making split composite sand block casting molds |
| DE3318112A1 (en) * | 1983-05-18 | 1984-11-22 | Achinger, Michael, 8900 Augsburg | METHOD AND DEVICE FOR PRODUCING CASTING MOLDS |
| CN105562623B (en) * | 2015-12-31 | 2017-10-24 | 华中科技大学 | A kind of waterglass sand mold quick forming method |
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|---|---|---|---|---|
| US3872915A (en) * | 1971-10-08 | 1975-03-25 | Akita Kk | Vacuum sealed molding apparatus |
| DE2401349B2 (en) * | 1973-01-11 | 1976-02-19 | PROCESS FOR MANUFACTURING A DIVIDED CASTING FORM FROM FIRE-RESISTANT, BINDING-FREE MATERIAL AS BACKFILL | |
| DE2619529A1 (en) * | 1975-05-01 | 1976-11-18 | Baker Perkins Holdings Ltd | METHOD AND DEVICE FOR FILLING FOUNDRY SHAPES OR CORE BOXES WITH A MOLD-BASED MIX |
| US4028455A (en) * | 1974-11-22 | 1977-06-07 | Mitsubishi Jukogyo Kabushiki Kaisha | Method for producing a reduced-pressure shaped mould |
| US4036276A (en) * | 1974-09-30 | 1977-07-19 | Mitsubishi Jukogyo Kabushiki Kaisha | Method of shaping a mould under a reduced pressure |
| DE2608740B1 (en) * | 1976-03-03 | 1977-09-08 | Eugen Dipl-Ing Buehler | Compression of moulding sand - using pre-compression by air pressure from closure plate with any mould filling process |
| AT340075B (en) * | 1975-04-21 | 1977-11-25 | Mitsubishi Heavy Ind Ltd | METHOD OF MAKING A MOLD |
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|---|---|---|---|---|
| DE945717C (en) * | 1943-11-14 | 1956-07-12 | Siemens Ag | Process for the production of casting molds for metal casting, iron casting or the like. |
| DE1097621B (en) * | 1956-03-23 | 1961-01-19 | Fritz Hansberg | Process and molding machine for the pneumatic production of foundry cores and foundry molds as well as boxes for this |
| DE1129660B (en) * | 1956-04-20 | 1962-05-17 | Gen Motors Corp | Method and device for backfilling molded masks during casting |
| DE1167488B (en) * | 1959-06-17 | 1964-04-09 | Shell Moulding Foundry Ltd | Process for the production of casting molds |
| US3293703A (en) * | 1962-11-13 | 1966-12-27 | Arthur R Taccone | Vacuum molding apparatus |
| GB1151237A (en) * | 1966-07-20 | 1969-05-07 | Barnett Levy | Method for Removing Sand Cores and Pattern Shells from Core Boxes and Patterns |
| JPS5519958B2 (en) * | 1972-08-15 | 1980-05-29 | ||
| JPS5532459B2 (en) * | 1973-12-21 | 1980-08-25 | ||
| DE2609274A1 (en) * | 1976-03-05 | 1977-09-08 | Buehler Eugen | Compacting sand into mould or core boxes - in which partial vacuum is applied via holes in pattern plate to aid compaction |
| 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 |
| DE2844464C2 (en) * | 1978-10-12 | 1983-03-24 | Bühler, Eugen, Dipl.-Ing., 8871 Burtenbach | Method and device for compacting casting molds |
-
1979
- 1979-04-21 DE DE19792916211 patent/DE2916211C2/en not_active Expired
-
1980
- 1980-04-09 EP EP19800101883 patent/EP0017902B1/en not_active Expired
- 1980-04-17 JP JP4962980A patent/JPS55141354A/en active Granted
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3872915A (en) * | 1971-10-08 | 1975-03-25 | Akita Kk | Vacuum sealed molding apparatus |
| DE2401349B2 (en) * | 1973-01-11 | 1976-02-19 | PROCESS FOR MANUFACTURING A DIVIDED CASTING FORM FROM FIRE-RESISTANT, BINDING-FREE MATERIAL AS BACKFILL | |
| US4036276A (en) * | 1974-09-30 | 1977-07-19 | Mitsubishi Jukogyo Kabushiki Kaisha | Method of shaping a mould under a reduced pressure |
| US4028455A (en) * | 1974-11-22 | 1977-06-07 | Mitsubishi Jukogyo Kabushiki Kaisha | Method for producing a reduced-pressure shaped mould |
| AT340075B (en) * | 1975-04-21 | 1977-11-25 | Mitsubishi Heavy Ind Ltd | METHOD OF MAKING A MOLD |
| DE2619529A1 (en) * | 1975-05-01 | 1976-11-18 | Baker Perkins Holdings Ltd | METHOD AND DEVICE FOR FILLING FOUNDRY SHAPES OR CORE BOXES WITH A MOLD-BASED MIX |
| DE2608740B1 (en) * | 1976-03-03 | 1977-09-08 | Eugen Dipl-Ing Buehler | Compression of moulding sand - using pre-compression by air pressure from closure plate with any mould filling process |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2116889A (en) * | 1982-03-23 | 1983-10-05 | Acme Conveyors & Constr | A process of moulding a metal casting mould |
| FR2724336A1 (en) * | 1994-09-14 | 1996-03-15 | Chardon Michel Georges | Fabrication of foundry moulds from binderless silica sand |
| CN104325075A (en) * | 2014-10-08 | 2015-02-04 | 柳州金茂机械有限公司 | V method casting process |
| CN113400649A (en) * | 2021-06-30 | 2021-09-17 | 山东威高骨科材料股份有限公司 | Method for solving thermal deformation of PEEK (polyetheretherketone) material part during 3D printing |
| CN113400649B (en) * | 2021-06-30 | 2023-07-04 | 山东威高骨科材料股份有限公司 | Method for solving thermal deformation of 3D printing PEEK material part |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2916211A1 (en) | 1980-10-30 |
| EP0017902B1 (en) | 1983-05-18 |
| DE2916211C2 (en) | 1983-11-24 |
| JPS6321576B2 (en) | 1988-05-07 |
| JPS55141354A (en) | 1980-11-05 |
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