Lithium-containing molding material mixture based on an inorganic binder for producing molds and cores for metal casting

A technology of inorganic adhesives and molding materials, applied in the direction of manufacturing tools, metal processing equipment, cores, etc., can solve the problem of no mold strength specification

Active Publication Date: 2016-02-03
ASK CHEM LP
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  • Abstract
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  • Application Information

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Problems solved by technology

However, these organic solvents have the disadvantage that they decompose when the casting is removed from the mold and partly give off significant amounts of harmful substances such as benzene, toluene and xylene
Although the manufacture of casting molds is mentioned as a possible application, no statement is made about the strength of the molds made, let alone their storage strength

Method used

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  • Lithium-containing molding material mixture based on an inorganic binder for producing molds and cores for metal casting
  • Lithium-containing molding material mixture based on an inorganic binder for producing molds and cores for metal casting
  • Lithium-containing molding material mixture based on an inorganic binder for producing molds and cores for metal casting

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[0139] 1. Preparation of Water Glass Adhesive from Lithium Hydroxide Solution

[0140] Tables 1, 2, 3 and 4 provide an overview of the components of the various inventive and non-inventive waterglass binders investigated in the current field of research. The preparation of the water glass binder is carried out by mixing the chemicals set forth in Table 1 or 2 such that a homogeneous solution exists. The application of the solution was carried out one day after its preparation in order to ensure its homogeneity. Alkali oxides and [SiO 2 ] concentration and its molar ratio and [Li 2 o aktiv ] / [M 2 The mass ratios of substances for O] are summarized in Tables 4 and 5. Table 3 gives an overview of the molding material mixture in which the lithium compound was added via the additive component. Here, the addition of solid lithium compounds together with amorphous SiO 2 together (see 2.1).

[0141] 2. Research on Storage Stability

[0142] 2.1 Preparation of molding mater...

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Abstract

The invention relates to lithium-containing molding material mixtures comprising a refractory main molding material, an inorganic binder, and amorphous silicon dioxide as an additive in the production of molds and cores for metal casting. The invention further relates to a method for producing molds and cores using the molding material mixtures and to molds and cores produced according to the method.

Description

technical field [0001] The invention relates to a lithium-containing molding material mixture based on an inorganic binder for the production of molds and mandrels for metal castings, comprising at least one refractory molding base material, one or more lithium compounds, at least water Glass as inorganic binder and amorphous silica as additive. Furthermore, the invention relates to a component system for producing a molding compound mixture, a lithium-containing inorganic binder, a method for producing molds and cores from a molding compound mixture and the Molds and cores. Background technique [0002] A foundry mold essentially consists of a mold or die and a core which is the female mold of the casting to be produced. The mandrel and the mold here consist of a refractory material, such as quartz sand, and a suitable binder which deprives the casting mold of sufficient mechanical strength after removal from the mold tool. The refractory molding base material is prefera...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/02B22C1/18
CPCB22C1/02B22C1/183B22C1/188B22C9/123B22C1/18
Inventor 海因茨·德特斯汉内斯·林克罗尼亚·雷施
Owner ASK CHEM LP
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