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Inorganic binding agent for casting and preparation method thereof

An inorganic binder and silicate technology, which is applied in the direction of casting molding equipment, casting molds, manufacturing tools, etc., can solve the problems of difficulty in regeneration and reuse, poor collapsibility, poor moisture resistance, etc., and achieve less usage, Good bonding performance and easy regeneration

Active Publication Date: 2017-07-18
郑宏伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, inorganic binders are commonly used in casting production at present, but there are problems such as low strength, easy aging, poor moisture resistance, poor collapse, and difficult regeneration and reuse.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The composition of present embodiment inorganic binder is as follows:

[0028] Sodium silicate: 89g; Sodium methyl silicate: 1g, Sodium tripolyphosphate: 10g

[0029] The preparation method of present embodiment inorganic binder:

[0030] Step 1: Add 89g of sodium silicate into the reaction kettle by weight percentage, stir evenly and heat to 50°C;

[0031] Step 2: Add 1g of sodium methyl silicate and 10g of sodium tripolyphosphate into the reaction kettle by weight percentage, stir

[0032] Homogenize until the system is clear.

[0033] Add 30g of inorganic binder to 1kg of 50 / 100 mesh standard sand, and add 4.5g of organic ester curing agent. The components of the curing agent are: triacetin, diacetin, monoacetin, ethyl alcohol One of glycol diacetate, ethylene glycol monoacetate, propylene carbonate or any mixture thereof. Mix sand for 2 minutes at room temperature to make a figure 8 sample of molding sand. Measured 24-hour tensile strength: 2.5MPa; residual str...

Embodiment 2

[0035] The composition of present embodiment inorganic binder is as follows:

[0036] Sodium potassium silicate: 72g; potassium methyl silicate: 3g, sodium hexametaphosphate: 25g

[0037] The preparation method of present embodiment inorganic binder:

[0038] Step 1: Take 72g of sodium potassium silicate according to the weight percentage and add it to the reaction kettle, stir evenly and heat to 50°C;

[0039] Step 2: Add 3 g of potassium methyl silicate and 25 g of sodium hexametaphosphate into the reaction kettle by weight percentage, stir

[0040] Homogenize until the system is clear.

[0041] Add 20g of inorganic binder to 1kg of 50 / 100 mesh standard sand, and add 6g of crosslinking agent, the content of each component of the crosslinking agent is: silicon dioxide 65%, aluminum oxide 20%, calcium oxide 6%, Sodium oxide 2%, iron oxide 1%, potassium oxide 3%, zirconium oxide 1%, zinc oxide 2%. Mix sand for 2 minutes at room temperature to make a figure 8 sample of moldi...

Embodiment 3

[0043] The composition of present embodiment inorganic binder is as follows:

[0044] Sodium silicate: 80g; methyl silicone oil: 1.5g, sodium tripolyphosphate: 18g

[0045] The preparation method of present embodiment inorganic binder:

[0046] Step 1: Add 80g of sodium silicate into the reaction kettle by weight percentage, stir evenly and heat to 50°C;

[0047] Step 2: Take 1.5g of methyl silicone oil and 18g of sodium tripolyphosphate into the reaction kettle by weight percentage, stir well

[0048] Mix until the system is clear.

[0049] Add 20g of inorganic binder to 1kg of 50 / 100 mesh standard sand, and add 6g of crosslinking agent, the content of each component of the crosslinking agent is: silicon dioxide 65%, aluminum oxide 20%, calcium oxide 6%, Sodium oxide 2%, iron oxide 1%, potassium oxide 3%, zirconium oxide 1%, zinc oxide 2%. Mix sand for 2 minutes at room temperature to make a figure 8 sample of molding sand. Blow with hot air at 150°C for 120s, after cool...

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Abstract

The invention discloses an inorganic binding agent for casting and a preparation method thereof, and belongs to a casting sand binding material. The inorganic binding agent for casting is excellent in binding performance, stable in system, environment-friendly, free of poison, wide in sources and better in actual applicability, is applied to the casting production, has such excellent performances as low consumption, high strength, fluidity, wet resistance and collapsibility, improves the casting quality, reduces the production cost, is liable to regenerate old sand, and is more beneficial for operators and environments.

Description

technical field [0001] The invention relates to a casting sand bonding material, in particular to an inorganic bonding agent for casting and a preparation method thereof. [0002] technical background [0003] At present, the sand binders used in foundry production include organic and inorganic. Most of the organic binders are resin polymers. Pollution and damage are caused to people and the environment. Resin polymers are petrochemical products, and the resources are non-renewable, and the cost remains high. Inorganic binders will gradually replace resin-based organic binders due to their environmental performance, wide range of resources, and low cost. However, inorganic binders are commonly used in foundry production at present, but there are problems such as low strength, easy aging, poor moisture resistance, poor collapsibility, and difficulty in recycling. Therefore, it is necessary to develop inorganic binders with better performance. Contents of the invention [...

Claims

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Application Information

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IPC IPC(8): B22C1/18
CPCB22C1/188
Inventor 郑宏伟
Owner 郑宏伟
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