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Mould material mixture having improved flowability

A technology of molding materials and mixtures, which is applied in the field of casting molds for metal processing and casting molds. It can solve the problems of irremovable adhesive layers, etc., and achieve the effects of reducing abrasion, reducing mechanical stress, and reducing maintenance costs.

Inactive Publication Date: 2010-09-22
ASHLAND SUEDCHEM KERNFEST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in most cases it is not possible to completely remove the adhesive layer

Method used

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  • Mould material mixture having improved flowability
  • Mould material mixture having improved flowability

Examples

Experimental program
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Effect test

Embodiment 1

[0162] The effect of surface active substances on the strength and density of molds.

[0163] 1. Preparation and Testing of Modeling Material Mixtures

[0164] To test the molding material mix, manufacture the figure 1 Entry channel core shown.

[0165] The composition of the molding material mixture is given in Table 1. To manufacture the entry channel core, proceed as follows:

[0166] The components listed in Table 1 were mixed in a mixer. For this purpose, firstly quartz sand is introduced and water glass and, if necessary, surface-active substances are added with stirring. Sodium water glass with a certain proportion of potassium is used as water glass. SiO in water glass 2 : M 2 The O modulus is about 2.2, where M represents the sum of sodium and potassium. After the mixture was stirred for 1 minute, the amorphous silica was added as needed with continued stirring. Immediately thereafter, the mixture was stirred for another 1 minute.

[0167] Move the modeling ...

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Abstract

The invention relates to a mould material mixture for producing casting moulds for metal processing, a process for producing casting moulds, casting moulds which can be obtained by the process and their use. The production of the casting moulds is carried out using a refractory base moulding material and a binder based on water glass. A proportion of a particulate metal oxide selected from the group consisting of silicon dioxide, aluminium oxide, titanium oxide and zinc oxide is added to the binder, with particular preference being given to using synthetic amorphous silicon dioxide. The mould material mixture contains a surface-active material as further significant constituent. The addition of the surface-active material enables the flowability of the mould material mixture to be improved, which makes it possible to produce casting moulds having a very complicated geometry.

Description

technical field [0001] The invention relates to a molding material mixture for producing casting molds for metalworking, said molding material mixture comprising at least one refractory molding substrate, a binder based on water glass, and a proportion of particulate metal oxides , the metal oxide is selected from silicon dioxide, aluminum oxide, titanium oxide and zinc oxide. Furthermore, the invention relates to a method for producing a casting mold for metalworking using a molding material mixture, as well as a casting mold obtained by means of this method. Background technique [0002] Casting molds for the production of metal bodies are basically produced in two structural forms. The first group forms the so-called core or mold. From these cores or forms are assembled a casting mold which is essentially a negative mold of the casting to be produced. The second group forms a hollow body, the so-called riser, which acts as a balancing reservoir. They hold the liquid m...

Claims

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Application Information

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IPC IPC(8): B22C1/18B22C1/26
CPCB22C1/188B22C1/26B22C1/04B22C1/167B22C1/186B22C1/24B22C9/12B22C9/123
Inventor 延斯·穆勒迪特尔·科克马库斯·弗罗恩约尔格·克施根
Owner ASHLAND SUEDCHEM KERNFEST
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