DE545123C - Manufacture of molds and cores for metal foundry purposes - Google Patents

Manufacture of molds and cores for metal foundry purposes

Info

Publication number
DE545123C
DE545123C DE1930545123D DE545123DD DE545123C DE 545123 C DE545123 C DE 545123C DE 1930545123 D DE1930545123 D DE 1930545123D DE 545123D D DE545123D D DE 545123DD DE 545123 C DE545123 C DE 545123C
Authority
DE
Germany
Prior art keywords
molds
cores
manufacture
metal foundry
foundry purposes
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
Application number
DE1930545123D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of DE545123C publication Critical patent/DE545123C/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)

Description

Herstellung von Formen und Kernen für Metallgießereizwecke Durch Patent 520 175 ist die Verwendung eines aus einem hydraulischen Bindemittel, Sand und geringen, zur vollständigen Hydratisierung des Bindemittels nicht ausreichenden Wassermengen bestehenden Mörtels zur Herstellung von Formen oder Kernen für Metallgießereizwecke geschützt.Manufacture of molds and cores for metal foundry purposes Patent 520 175 protects the use of a mortar consisting of a hydraulic binder, sand and small amounts of water inadequate to completely hydrate the binder in the manufacture of molds or cores for metal foundry purposes.

Es hat sich nun als besonders zweckmäßig erwiesen, als Ausgangsmaterial für diese Formmasse bereits gebrauchte Formmasse zu verwenden. Infolge der Unterhydratisierung des hydraulischen Bindemittels, als welches vorzugsweise Portlandzement dient, kann ein Teil desselben auch bei wiederholter Verwendung noch Wasser aufnehmen und erhärten.It has now proven to be particularly useful as a starting material to use already used molding compound for this molding compound. As a result of underhydration of the hydraulic binder, which is preferably used as Portland cement Part of it will still absorb water and harden even after repeated use.

Die gemäß Patent 52O175 hergestellten gebrauchten oder unbenutzten Formen werden wieder zerkleinert; die Masse wird dann gegebenenfalls gesiebt, um ein Zerkleinerungsprodukt von gewünschter Korngröße zu erhalten. Das in diesem enthaltene nicht hydratisierte Bindemittel wird durch den Zerkleinerungsprozeß zum Teil aus dem Gemisch freigemacht, zum Teil bleibt es aber am Sand selbst und am erhärteten Bindemittel haften. Das durch die Zerkleinerung freigemachte nicht hydratisierte. Bindemittel bleibt mit Vorteil mit dem Sand gemischt. In gewissen Fällen ist diese Mischung selbst wieder verwendungsfähig zur Herstellung von Formen gemäß Patent 5 20 1 7 5. Es ist jedoch vorteilhaft, der auf diese Weise durch Zerkleinerung gewonnenen Masse eine gewisse Menge neuen hydraulischen Bindemittels zuzusetzen, um unter Berücksichtigung des bereits im Zerkleinerungsprodukt vorhandenen nicht hydratisierten Bindemittels ein Gemisch zu erhalten, das in seiner Zusammensetzung dem Ausgangsmaterial für die Herstellung von Formen gemäß Patent 520 175 entspricht. Sodann wird der Masse weniger Wasser, als zur vollständigen Hydratisierung des Bindemittels erforderlich ist, zugesetzt. Die alten Formen können unbegrenzt oft wieder verwendet werden.The used or unused molds made according to patent 520175 are crushed again; the mass is then optionally sieved in order to obtain a comminution product of the desired particle size. The non-hydrated binding agent contained in this is partly released from the mixture by the comminution process, but partly it remains adhering to the sand itself and to the hardened binding agent. The unhydrated that is freed by the comminution. The binder advantageously remains mixed with the sand. In certain cases, this mixture itself can be reused for the production of molds according to patent 5 20 1 7 5. However, it is advantageous to add a certain amount of new hydraulic binder to the mass obtained in this way by comminution, in order to take into account what is already present in the comminution product Non-hydrated binder to obtain a mixture that corresponds in its composition to the starting material for the production of molds according to patent 520 175. Then less water is added to the mass than is necessary to completely hydrate the binder. The old shapes can be reused an unlimited number of times.

Claims (1)

PATENTANSPRUCii Verfahren zum Herstellen von Massen für Gußformen oder -kerne unter Verwendung gebrauchter Formmassen, dadurch gekennzeichnet, äaß aus unterhydratisiertem Beton bestehende zerkleinerte, gebrauchte Gußform- oder Kernmassen mit Wasser, gegebenenfalls unter Zusatz geringer Mengen eines hydraulischen Bindemittels, vermischt werden.PATENT claims Process for the production of masses for casting molds or cores using used molding compounds, characterized in that aaass crushed, used casting mold or Core masses with water, optionally with the addition of small amounts of a hydraulic one Binder, are mixed.
DE1930545123D 1929-11-09 1930-04-05 Manufacture of molds and cores for metal foundry purposes Expired DE545123C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR545123X 1929-11-09

Publications (1)

Publication Number Publication Date
DE545123C true DE545123C (en) 1932-02-25

Family

ID=8932760

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1930545123D Expired DE545123C (en) 1929-11-09 1930-04-05 Manufacture of molds and cores for metal foundry purposes

Country Status (1)

Country Link
DE (1) DE545123C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748060C (en) * 1940-09-28 1944-10-25 Compound for the production of foundry molds using under-hydrated cement
EP3620445A1 (en) 2018-09-05 2020-03-11 Technische Universitat Bergakademie Freiberg Foundry binder mixture and foundry moulding material mixture for producing a foundry mould for producing foundry moulds and cores

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748060C (en) * 1940-09-28 1944-10-25 Compound for the production of foundry molds using under-hydrated cement
EP3620445A1 (en) 2018-09-05 2020-03-11 Technische Universitat Bergakademie Freiberg Foundry binder mixture and foundry moulding material mixture for producing a foundry mould for producing foundry moulds and cores

Similar Documents

Publication Publication Date Title
DE1096029B (en) Process for the production of deformable synthetic resin compositions
CH415050A (en) Process for the production of a resin composition suitable as a molding sand binder
DE545123C (en) Manufacture of molds and cores for metal foundry purposes
DE520175C (en) Manufacture of molds and cores for metal foundry purposes
DE2233667A1 (en) CURING MIXTURES OF ALKALINE SILICATE AND REFRACTORY MATERIAL
DE862342C (en) Molding compound for foundries
DE651849C (en) Process for the production of mortar and coating material for building masonry forms or cores
DE743037C (en) Process for the production of heaped core masses
DE871824C (en) Process for the production of cores for foundry purposes
DE62270C (en) Process for the production of artificial stone masses
DE330249C (en) Process for the production of small moldings, especially buttons, from plaster of paris, cement or the like.
DE461889C (en) Process for the production of a heat protection compound consisting mainly of plaster
DE861154C (en) Process for the production of malleable masses
DE2518485A1 (en) Binder for foundry mould and core matl. - comprising aq alkali silicate and org. colloidal soln e.g. of starch or cellulose ether
AT138199B (en) Process for the production of moldings from synthetic resins.
AT292213B (en) Process for producing flowable, self-solidifying masses, in particular for casting cores and molds
AT300221B (en) Process for the production of flowable, self-hardening masses for casting cores and molds
DE590227C (en) Process for the production of molded bodies from a lean substance and a clay binder treated with alkalis or other liquefying agents
DE383573C (en) Process for making models and molds
AT135683B (en) Embedding and soldering compounds for dental purposes.
AT128643B (en) Process for the production of clay-bound products.
AT91031B (en) Process for the production of small moldings, especially buttons made of cement, plaster or the like.
DE855219C (en) Manufacture of building materials
AT111272B (en) Method of making sand molds for molding model plates.
DE750672C (en) Process for the production of cores