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Material mixture for producing casting moulds for machining metal

A modeling material and metal processing technology, applied in the direction of metal processing equipment, casting molds, manufacturing tools, etc., can solve problems such as impossible safety

Inactive Publication Date: 2007-08-29
ASK CHEM LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is impossible for the molded body of this type to be stored for a long time, such as the storage time commonly used for organic binders.

Method used

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  • Material mixture for producing casting moulds for machining metal
  • Material mixture for producing casting moulds for machining metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Influence of Synthetically Prepared Amorphous Silica on the Strength of Shaped Body Using Quartz Sand as Modeling Basic Material

[0078] 1. Preparation and testing of molding material mixture

[0079] So-called Georg-Fischer test pins are produced for testing molding material mixtures.

[0080] A Georg-Fischer test pin is understood to be a cuboid test pin with dimensions 150 mm×22.36 mm×22.36 mm.

[0081] The composition of the molding material mixture is given in Table 1. To prepare the Georg-Fischer test pins proceed as follows:

[0082] - The components listed in Table 1 were mixed in a laboratory paddle mixer (Vogel & Schemmann AG, Hagen, DE). To do this, first precharge the quartz sand and add the water glass with stirring. Sodium water glass is used as water glass, which has a certain proportion of potassium. Therefore in the following table the SiO 2 : M 2 The modulus of O, where M is given is the sum of sodium and potassium. After the mixture was stirred...

Embodiment 2

[0114] Influence of the alkali water glass:amorphous silica ratio on the strength of shaped bodies with quartz sand as molding base material at a constant total binder quantity.

[0115] 1. Preparation and testing of molding material mixture

[0116] The preparation of the molding material mixture and its testing were carried out analogously to Example 1. The composition of the molding material mixture used to prepare the test pins is listed in Table 3. The values ​​obtained in the flexural strength test are listed in Table 4.

[0117] table 3

[0118] Composition of the molding material mixture

[0119] Quartz sand

H32

alkali metal

water glass b)

amorphous

silica c)

2.1 a)

100GT

2.5GT

-

compare, not root

According to the present invention

2.2

100GT

2.3GT

0.2 GT

According to the present invention

2.3

100GT

1.9 GT

0.6 GT

Accordin...

Embodiment 3

[0129] Effect of silane on the strength of moldings

[0130] 1. Preparation and testing of molding material mixture

[0131] The preparation of the molding material mixtures and their testing was carried out analogously to Example 1. The composition of the molding material mixture used to prepare the test pins is listed in Table 5. The values ​​obtained in the flexural strength test are listed in Table 6.

[0132] table 5

[0133] Composition of the molding material mixture

[0134] Quartz sand

H32

alkali metal

water glass c)

amorphous

silica d)

Silane

3.1 a)

100GT

2.5GT

---

---

compare, not root

According to the present invention

3.2 b)

100GT

2.5GT

0.2 GT

---

According to the present invention

3.3

100GT

2.5GT

0.2 GT

0.02

GT e)

According to the present invention

3.4

...

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Abstract

The invention relates to a material mixture for producing casting moulds for machining metal, to a method for producing casting moulds, and to a method which produces said casting moulds and to the use thereof. A fire-resistant moulding base material and a binding agent based on water glass is used in the production of casting moulds. A proportion of the particle-shaped metal oxide is added to the binding agent, said metal oxide being selected from the group of silicon dioxide, aluminium oxide, titanium oxide and zinc oxide. Synthetic amorphous silicon dioxide is preferably used as a metal oxide.

Description

technical field [0001] The invention relates to a molding material mixture for producing casting molds for metalworking, which contains at least one flowable refractory molding base material and a binder based on water glass. In addition, the present invention also relates to a method of using the molding material mixture to prepare a mold for metal processing, and the mold obtained by using the method. Background technique [0002] The casting molds for producing metal shaped bodies are basically produced in two structural forms. The first group forms the so-called cores or forms. A mold is assembled from it, which is essentially a negative mold of the casting to be produced. The second group forms a hollow body, the so-called feeder, which acts as a balancing reserve container. The container receives the liquid metal, and corresponding measures ensure that the metal remains in the liquid phase for a longer period of time than the metal in the mold forming the negative m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/18
CPCB22C1/188B22C1/18B22C1/16B22C1/00
Inventor G·威克D·考奇J·米勒U·斯科蒂H·雷瑟A·基尼克R·施特策尔T·丁瓦尔德
Owner ASK CHEM LP
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