Patent
Process for preparing mold
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TLDR
In this article, a mold with an increased compression strength and a good collapsibility is prepared with a good efficiency by mixing refractory particles with a binder material comprising a caustic alkali-neutralized product of a copolymer containing a carboxyl group and calcium hydroxide.Abstract:
A mold with an increased compression strength and a good collapsibility is prepared with a good efficiency by mixing refractory particles with a binder material comprising a caustic alkali-neutralized product of a copolymer containing a carboxyl group and calcium hydroxide, thereby preparing molding materials, filling the molding materials around a pattern, and blowing CO 2 gas into the mold sand, thereby hardening the molding materials. Polyvinyl alcohol, calcium oxide, at least one hydroxide of zinc, aluminum, barium, magnesium, and iron, SBR latex, etc. can be added to the binder material, when desired.read more
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Impregnated ceramic core and method of making
TL;DR: An impregnated fired, porous ceramic core for use in an investment casting shell mold in the casting of molten metals and alloys is strengthened by impregnating the core with an aqueous emulsion of water-insoluble polymer followed by drying to remove the water as discussed by the authors.
Patent
Binders for foundry cores and moulds
TL;DR: A binder for a foundry core or mold consists of an alkali metal salt of a polybasic organic acid or of a polymerized monobasic organic acid, for example sodium polyacrylate, an alkaline earth metal hydroxide such as calcium hydroxides, one or more polyvalent metal oxides, preferably magnesium oxide, and calcium citrate, together with water as mentioned in this paper.
Patent
Composition for preparation of articles of calcium oxide
Jean Debuigne,Serge Prigent +1 more
TL;DR: In this article, a composition for the preparation of articles of calcium oxide, comprising calcined calcium oxide and an organic phase consisting of at least one polyol in an anhydrous medium, was proposed.
Patent
Powdered binder for mold-making and a process for preparing a mold by using the same
TL;DR: A binder of this invention is a powder which comprises an intimate mixture of a copolymer of maleic anhydride with an olefinically unsaturated compound selected from the group consisting of an aliphatic α-olefin having 2 to 8 carbon atoms, styrene and methyl vinyl ether, and if desired, up to 300 parts by weight of additive per 100 parts of the total weight of said copolymers and said caustic alkali as discussed by the authors.
Patent
Method of making and using ferrous metal particle briquettes
TL;DR: Ferrous metal briquettes made from ferrous metal particles and an alkaline metal silicate, for adding to ferrous melts to recycle the particles are made by as discussed by the authors.
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Foundry mold or core compositions and method
TL;DR: In this article, the authors present a method for producing foundry sand cores or molds of initial high strength but with essentially no strength after casting metals above 700° C. which involves shaping and setting a composition containing a binder comprising sodium, potassium, or lithium silicate and sufficient amorphous silica.