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Matched liquid curing agent for phosphate binding agent in warm box process and using method of matched liquid curing agent

A phosphate and binder technology, which is applied in the field of supporting liquid curing agent for phosphate binder in the warm core box process, can solve the problems of poor fluidity and unstable strength of molding sand, and achieve low cost, easy operation and low production cost. low effect

Active Publication Date: 2019-11-26
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a matching liquid curing agent for the phosphate binder of warm core box technology to replace the existing liquid curing agent matching with the phosphate binder, so as to solve the storage problem of the prepared sand mold (core) Technical problems of unstable strength and poor fluidity of molding sand during the process

Method used

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  • Matched liquid curing agent for phosphate binding agent in warm box process and using method of matched liquid curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Mix the silane coupling agent KH-550 and water evenly at a mass ratio of 1:1, and obtain liquid A after the coupling agent is fully hydrolyzed, and set aside;

[0023] 2. Mix anhydrous sodium carbonate and water evenly at a mass ratio of 1:3 to obtain liquid B for later use;

[0024] 3. Weigh 1000g of raw sand, 25g of phosphate binder, 5g of solution A, and 4g of solution B for later use.

[0025] 4. Mix the raw sand with liquid A and stir for 30 seconds, then add phosphate binder and stir for 60 seconds, and finally add liquid B and stir for 60 seconds to produce sand.

[0026] 5. Molding sand performance test: Use the coated sand sample making machine to make a standard "8"-shaped sand sample, set the mold temperature at 60°C, sand injection pressure 0.4Mpa, blowing pressure 0.2Mpa, blowing time 2 minutes, demold after hardening Store and test the tensile strength every 24 hours.

Embodiment 2

[0028] 1. Mix the silane coupling agent KH-550 and water evenly at a mass ratio of 1:3, and obtain liquid A after the coupling agent is fully hydrolyzed, and set aside;

[0029] 2. Mix anhydrous sodium carbonate and water evenly at a mass ratio of 1:3 to obtain liquid B, which is set aside;

[0030] 3. Weigh 1000g of raw sand, 20g of phosphate binder, 6g of A solution and 2g of B solution for later use.

[0031] 4. Mix the raw sand with liquid A and stir for 40 seconds, then add phosphate binder and stir for 70 seconds, and finally add liquid B and stir for 70 seconds to produce sand.

[0032] 5. Molding sand performance test: Use the coated sand sample making machine to make a standard "8"-shaped sand sample, set the mold temperature at 60°C, sand injection pressure 0.4Mpa, blowing pressure 0.2Mpa, blowing time 2 minutes, demold after hardening Store and test the tensile strength every 24 hours.

Embodiment 3

[0034] 1. Mix the silane coupling agent KH-550 and water evenly at a mass ratio of 1:5, and obtain liquid A after the coupling agent is fully hydrolyzed, and set aside;

[0035] 2. Mix anhydrous sodium carbonate and water evenly at a mass ratio of 1:3 to obtain liquid B, which is set aside;

[0036] 3. Weigh 1000g of raw sand, 24g of phosphate binder, 8g of solution A, and 3g of solution B for later use.

[0037] 4. Mix the original sand with liquid A and stir for 50 seconds, then add phosphate binder and stir for 80 seconds, and finally add liquid B and stir for 80 seconds to produce sand.

[0038] 5. Molding sand performance test: Use the coated sand sample making machine to make a standard "8"-shaped sand sample, set the mold temperature at 60°C, sand injection pressure 0.4Mpa, blowing pressure 0.2Mpa, blowing time 2 minutes, demold after hardening Store and test the tensile strength every 24 hours.

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Abstract

The invention provides a matched liquid curing agent for a phosphate binding agent in the warm box process and a using method of the matched liquid curing agent. The matched liquid curing agent is prepared from a solution A and a solution B, and the mass ratio of the solution A and the solution B is (1.25-3):1, wherein the solution A is composed of a silane coupling agent KH-550 hydrolysate prepared from a silane coupling agent KH-550 and water at the mass ratio of 1:(1-5), and the solution B is composed of a sodium carbonate hydrolysate prepared from anhydrous sodium carbonate and water at the mass ratio of 1:3. The matched liquid curing agent can solve the technical problems that prepared sand moulds (cores) are unstable in strength in the storage process, and moulding sand mobility is poor; and operation is easy and convenient, cost is low, and the matched liquid curing agent can be applied and popularized.

Description

technical field [0001] The invention relates to the field of molding materials in the foundry industry, in particular to a matching liquid curing agent for phosphate binders in warm core box technology and a method for using the same. Background technique [0002] With the increasingly stringent environmental protection supervision and the awakening of people's awareness of environmental protection, the environmental pollution problems caused by traditional organic resin binders cannot be ignored, and traditional inorganic binders have low molding strength, poor molding sand collapsibility, etc. The problem is not ideal in practical application. It is imminent to seek a new type of inorganic binder that can replace traditional organic resin sand. [0003] Phosphate binder is a green casting binder with low curing temperature, good heat resistance, small gas generation, good high temperature collapse, good reusability, simple process and low cost. It is a very A molding mat...

Claims

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Application Information

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IPC IPC(8): B22C1/18
CPCB22C1/185
Inventor 张友寿唐文卓夏露
Owner HUBEI UNIV OF TECH
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