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Furan resin self-setting sand, its production method and casting sand mold

A technology of furan resin and self-hardening sand, which is applied in the field of foundry sand mold and furan resin self-hardening sand, can solve the problem of insufficient strength, and achieve the effects of improving strength, high strength and easy production method.

Active Publication Date: 2022-02-25
CRRC QISHUYAN INSTITUTE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the strength of existing furan resin self-setting sand is not high enough

Method used

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  • Furan resin self-setting sand, its production method and casting sand mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]Weigh 1Kg of Dalin sand, then add +140 mesh pearl sand with 1wt% Dalin sand weight, and mix in a bowl-type sand mixer for 1 min. Add 50wt% furan resin curing agent (that is, 0.6wt% Dalin sand weight) to the mixed sand, and then mix for 30s. Then add 1.2wt% furan resin by weight of Dalin sand and mix for another 30s.

Embodiment 2

[0042] Weigh 1Kg of Dalin sand, then add 2wt% Dalin sand weight +140 mesh pearl sand, and mix in a bowl-type sand mixer for 1 min. Add 50wt% furan resin curing agent (that is, 0.6wt% Dalin sand weight) to the mixed sand, and then mix for 30s. Then add 1.2wt% furan resin by weight of Dalin sand and mix for another 30s.

Embodiment 3

[0044] Weigh 1Kg of dalin sand, then add 2wt% dalin sand weight of +140 mesh pearl sand and 2wt% dalin sand weight of -140 mesh to +200 mesh pearl sand, and mix in a bowl type sand mixer for 1min. Add 50wt% furan resin curing agent (that is, 0.6wt% Dalin sand weight) to the mixed sand, and then mix for 30s. Then add 1.2wt% furan resin by weight of Dalin sand and mix for another 30s.

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Abstract

The application discloses a furan resin self-setting sand, its preparation method and casting sand mold. The furan resin self-setting sand of the present application includes silica sand, pearl sand, curing agent and furan resin, wherein the amount of pearl sand is 1-5 wt% of the silica sand. During the mixing process, pearl sand is easy to fill into the gaps between silica sands, so as to increase the number of bonding bridges between furan resin self-setting sand particles, thereby improving the strength of molding sand. Therefore, the addition of binders such as resin can also be reduced, and the emission of harmful gases from foundry enterprises can be reduced. Moreover, the manufacturing method of the furan resin self-setting sand of the present application is easy to implement and convenient for production and application. The foundry sand mold provided in the present application is made from the furan resin self-setting sand provided in the embodiment of the present application, and has relatively high strength.

Description

technical field [0001] The application relates to the technical field of casting, in particular, to furan resin self-setting sand, a manufacturing method thereof and a casting sand mold. Background technique [0002] Furan resin no-bake sand has the advantages of excellent formability, high dimensional accuracy of castings, high production efficiency, good high-temperature collapsibility, and excellent regeneration performance of old sand. Since the 1970s, the furan resin self-setting sand molding production process has been widely used in the foundry industry. For furan resin self-setting sand, the strength of molding sand is one of the key indicators in its performance. But the intensity of existing furan resin self-setting sand is not high enough. [0003] In view of this, the present application is proposed. Contents of the invention [0004] The purpose of this application is to provide furan resin self-setting sand, its preparation method and foundry sand mold. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/00B22C1/22B22C9/02
CPCB22C1/00B22C1/224B22C9/02
Inventor 肖恭林董鹏穆彦青杨志刚崔会徐小辉
Owner CRRC QISHUYAN INSTITUTE CO LTD
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