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Inactivation method used for cold core box resin

A cold core box and resin technology, which is applied to the cleaning/processing machinery of casting materials, casting molding equipment, metal processing equipment, etc. Cost and effect of prolonged use

Active Publication Date: 2009-05-27
SUZHOU XINGYE MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the polyisocyanate resin is mixed with the phenolic resin, even if there is no catalyst such as triethylamine, the isocyanate group can react with the active groups in the phenolic resin, resulting in a shortened usable time of the mixed material mixed with the phenolic resin and the polyisocyanate resin. Thereby greatly increasing the operating cost of the foundry plant

Method used

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  • Inactivation method used for cold core box resin
  • Inactivation method used for cold core box resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Throw in 600 kg of PAPI and 20 kg of caprolactam, stir, heat up to 80±5°C, keep warm for 30 minutes, cool down to 60±5°C, add 40 kg of sodium bisulfite, keep warm for 1 hour, cool down to 40°C, and throw sodium sulfamate 3 kg, stirred for 15 minutes. Add 165 kilograms of alkane solvent.

[0045] The above-mentioned synthetic II component (polyisocyanate resin) and the I component involved in the invention of the patent application number 200610039153.2 are made into resin sand mixture according to the following proportioning (weight ratio), Daelim standard sand (50~100 mesh) 100%, 1% of component I (accounting for sand weight), 1% of component II (accounting for sand weight). Among them, first add component I and mix for 1 minute, then add component II and mix for 2 minutes, then store the mixture in a constant temperature and humidity box, and take out an appropriate amount of mixture every hour from 30 hours to prepare "8" Word sample, used to measure the instantane...

Embodiment 2

[0054] Add 1600 kg of PAP and 30 kg of caprolactam, stir, heat up to 80±5°C, keep warm for 30 minutes, cool down to 60±5°C, add 40 kg of sodium bisulfite, keep warm for 1 hour, cool down to 40°C, add sulfamic acid Sodium 3 kg, stirring for 15 minutes. Add 165 kilograms of alkane solvent.

[0055] The above-mentioned synthetic II component (polyisocyanate resin) and the I component involved in the invention of the patent application number 200610039153.2 are made into resin sand mixture according to the following proportioning (weight ratio), Daelim standard sand (50~100 mesh) 100%, 1% of component I (accounting for sand weight), 1% of component II (accounting for sand weight). Among them, first add component I and mix for 1 minute, then add component II and mix for 2 minutes, then store the mixture in a constant temperature and humidity box, and take out an appropriate amount of mixture every hour from 30 hours to prepare "8" Word sample, used to measure the instantaneous te...

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PUM

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Abstract

The invention relates to a triethylamine cold box resin with inactivating and activating technology, changing the features for polyisocyanates, with the inactivated isocyanate group stored together with formaldehyde-phenol resin, catalyzed by triethylamine and blew by heated compressed air or nitrogen, two kinds of resins can be crossbinding and hardening instantly to meet the requirement for longer durability.

Description

technical field [0001] The invention relates to a passivation method for cold box resin, in particular to a passivation method for cold box resin in the casting field. Background technique [0002] At present, most of the cold box resins used in the domestic market are triethylamine cold box resins, which are composed of three parts: component I: special phenolic resin, component II: polyisocyanate resin, component III (catalyst) : Triethylamine. Most of component II is free isocyanate, and its isocyanate group is very active, which can react with certain active hydrogen-containing substances or substances that can react with isocyanate groups. When the polyisocyanate resin is mixed with the phenolic resin, even if there is no catalyst such as triethylamine, the isocyanate group can react with the active groups in the phenolic resin, resulting in a shortened usable time of the mixed material mixed with the phenolic resin and the polyisocyanate resin. Thereby greatly improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C5/00
Inventor 王进兴
Owner SUZHOU XINGYE MATERIALS TECH