Adhesive for casting mold, manufacturing core and method of manufacturing the same

A technology of binders and modifiers, applied in casting molding equipment, casting molds, cores, etc., can solve problems such as environmental pollution, waste of silica sand resources, etc., and achieve the effects of high strength, good collapsibility, and strong adaptability

Inactive Publication Date: 2008-01-23
SHENYANG HYATON FOUNDRY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It causes a waste of silica sand resources, and at the same time, waste alkali-containing sand is discharged in large quantities as solid waste, causing environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add industrial solid sodium silicate, 338kg of solid-1 type, 13.3kg of potassium hydroxide with a content of 75%, 140kg of sodium hydroxide with a content of 73.6%, 8kg of sorbitol, 1kg of ethylene glycol, 1kg of polypropylene glycol, and 500kg of water into the high-pressure tank , feed steam, slowly heat up to 158°C, keep warm at 158°C to 169°C for 2 hours, put it into a storage tank, settle for 72 hours, and release the clarified liquid, which is the adhesive of the present invention, recorded as A1, and listed Enter Table 1.

[0038] Its chemical composition mass percent is:

[0039] SiO 2 twenty three

[0040] Na 2 O 20

[0041] K 2 O 1

[0042] Modifier 1

[0043] Water 54%

Embodiment 2

[0045] Industrial solid sodium silicate solid-1 type 353kg, potassium hydroxide 53kg, containing N 2O 73.6%, 102kg of sodium hydroxide, 10kg of xylitol, 3kg of propylene glycol, 2kg of polypropylene glycol, 4kg of glycerin, 1kg of polyglycerol, 20kg of sorbitol, and 500kg of water are added to the high-pressure tank, and steam is introduced, and the temperature is slowly raised to 158°C. Keep warm at 158°C to 169°C for 2 hours, put it into a storage tank, settle for 72 hours, and release the clarified liquid, which is the binder of the present invention, recorded as A2, and listed in Table 1.

[0046] SiO 2 twenty four%

[0047] K 2 O 4%

[0048] Na 2 O 15%

[0049] Water 53%

[0050] Modifier 4%

[0051] The binder is marked as A2 and listed in Table 1

Embodiment 3

[0053] Add 379kg of industrial solid sodium potassium silicate type II, 142kg of sodium hydroxide, 20kg of potassium hydroxide, 15kg of xylitol, 20kg of sorbitol, 20kg of maltitol, 10kg of mannitol, 2kg of pentaerythritol, 3kg of diethylene glycol, and 530kg of water into the high pressure The tank is fed with steam, slowly heated to 158°C, kept at 158°C-169°C for 2 hours, put into the storage tank, precipitated for 72 hours, and released the clarified liquid, which is the adhesive of the present invention, recorded as A3, and its Included in Table 1.

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PUM

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Abstract

A cohesion agent for casting module and making core is provided, which is characterized in that: the mass per centage ration of the main chemical component of the cohesion agent is SiO2, 23 to 31, K2O 0.5 to 28, Na2O 1 to 21, modifying agent 0.5 to 21 and excess water. Wherein, the modifying agent chooses one or two in sorbierite, xylitol, mannite, maltitol, glycol, propanediol, glycerol, pentaerythritol, diglycol, propylene glycol, carbowax, PPG and polyglycerol, the adding volume is 0.5 to 21 per cent. When using the cohesion agent to prepare sand mole core, the dosage is little, the old sand can be recycled and the prepared core has good collapse performance.

Description

Technical field: [0001] The invention relates to casting technology, and in particular provides a sand mold (core) binder for casting. The invention also relates to the preparation method of the sand mold (core) binder. Background technique: [0002] At present, the foundry industry widely uses the self-setting sand process to produce various castings. The molding binders used are divided into: artificially synthesized organic binders and inorganic binders. The organic binder system includes: acid-cured phenolic resin no-bake sand, acid-cured furan resin no-bake sand, amine-cured urethane resin no-bake Sand, ester cured alkaline phenolic resin no-bake sand. Among them, furan resin no-bake sand is widely used in my country, and the annual production of furan resin for foundry in my country is about 80,000 to 100,000 tons. These processes release during production include: formaldehyde, amine, SO 2 , isocyanide, dioxin, furan and other harmful substances, causing environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/20
Inventor 余明伟
Owner SHENYANG HYATON FOUNDRY MATERIAL
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