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A kind of production method of cold box resin for casting

A production method and cold box technology, applied to casting molding equipment, molds, cores, etc., can solve the problems of not using triethylamine to catalyze the cold box resin production method, and achieve good dimensional accuracy and casting quality , The effect of high molding sand strength

Active Publication Date: 2016-05-11
共享新材料(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But do not adopt the production method of triethylamine catalyzed cold box resin so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment one: a kind of production method of casting cold box resin: the method comprises the steps:

[0021] a. Melt 28% of industrial phenol into the reactor, start the mixer, add 12% of solid paraformaldehyde, modifier: 2.5%, metal ion catalyst: 0.08%;

[0022] b. Open the steam valve, slowly raise the temperature, rise to 105°C within 40-50min, and keep the temperature at 105-108°C for 30min;

[0023] c. Heat up to 112°C within 10-20min, and keep the temperature at 112-115°C for 50min;

[0024] d. After the heat preservation is over, continue to heat up and dehydrate under normal pressure. When the temperature in the kettle rises to 120°C, time the constant temperature, and keep the temperature at 120-123°C for 30 minutes;

[0025] e. At the end of constant temperature, vacuum and continue dehydration;

[0026] f. When the total amount of dehydration reaches 60% of the amount of formaldehyde, stop dehydration, add 30% of polar dibasic acid ester, 19% of non-pola...

Embodiment 2

[0028] Embodiment two: a kind of production method of casting cold box resin: the method comprises the steps:

[0029] a. Add 35% of melted phenol into the reactor, start the mixer, add 15% of solid paraformaldehyde, modifier: 3%, metal ion catalyst: 0.1%;

[0030] b. Open the steam valve, slowly raise the temperature, rise to 108°C within 40-50min, and keep the temperature at 108-110°C for 30min;

[0031] c. Heat up to 113°C within 10-20min, keep at 113-115°C for 50min

[0032] d. After the heat preservation is over, continue to heat up and dehydrate under normal pressure. When the temperature in the kettle rises to 120°C, time the constant temperature, and keep the temperature at 120-123°C for 30 minutes;

[0033] e. At the end of constant temperature, vacuum and continue dehydration;

[0034] f. When the total amount of dehydration reaches 60% of the amount of formaldehyde, stop dehydration, add polar dibasic acid ester: 25%, non-polar high boiling point solvent oil: 16%,...

Embodiment 3

[0036] Embodiment three: a kind of production method of casting cold box resin: the method comprises the following steps:

[0037] a. Add 42% of melted phenol into the reactor, start the mixer, add 18% of solid paraformaldehyde, modifier: 3.5%, metal ion catalyst: 0.12%;

[0038] b. Open the steam valve, slowly raise the temperature, rise to 108°C within 40-50min, and keep the temperature at 108-110°C for 30min;

[0039] c. Heat up to 113°C within 10-20min, keep at 113-115°C for 50min

[0040] d. After the heat preservation is over, continue to heat up and dehydrate under normal pressure. When the temperature in the kettle rises to 120°C, time the constant temperature, and keep the temperature at 120-123°C for 30 minutes;

[0041] e. At the end of constant temperature, vacuum and continue dehydration;

[0042] f. When the total amount of dehydration reaches 60% of the amount of formaldehyde, stop dehydration, add polar dibasic acid ester: 20%, non-polar high boiling point so...

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Abstract

The invention relates to a method for producing resin, and particularly relates to a method for producing casting cold-box resin. The method comprises the following steps: adding dissolved industrial phenol to a reaction kettle; starting an agitator; adding solid paraformaldehyde, a regulator and 0.08-0.12% of metal ion catalyst; opening a steam valve, slowly heating up, and heating up to 105 DEG C within 40-50 minutes; keeping constant temperature at 105-108 DEG C for 30 minutes; heating up to 112 DEG C within 10-20 minutes, and keeping constant temperature at 112-115 DEG C for 50 minutes; continuing to heat up and dewatering under normal pressure after heat preservation is finished; timing constant temperature when the temperature inside the kettle ascends to 120 DEG C, and keeping constant temperature at 120-123 DEG C for 30 minutes; after constant temperature is finished, vacuumizing and continuing to dewater; stopping dewatering when the total dewatering amount achieves 60% of formaldehyde amount; adding a polar dibasic acid ester, nonpolar high-boiling point solvent oil and a modifier; agitating for 60 minutes; adding an enhancer when cooling to below 40 DEG C; evenly agitating, detecting and packaging. The casting cold-box resin which is low in viscosity, and high in casting sand strength, can be used for a long period of time, and meets core-making production in batches is provided by the invention.

Description

technical field [0001] The invention relates to a production method of resin, in particular to a production method of cold box resin for casting. Background technique [0002] After years of development in the foundry industry, many new shapes and core-making processes have emerged. The cold box core-making process is a new type of core-making process developed in the 1960s. Among them, the triethylamine cold box process is the most widely used cold box core making process in foundry production. In industrially developed countries, this process accounts for about 90% of all cold box method cores, and it has also been widely used in our country. [0003] But also do not adopt the production method of triethylamine catalyzed cold box resin so far. Contents of the invention [0004] The purpose of the present invention is to overcome the defects of the prior art and provide a method for producing cold box resin for foundry with low viscosity, high molding sand strength and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/10B22C1/22
Inventor 韩文何龙杨洋
Owner 共享新材料(山东)有限公司
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