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Formula and preparation process for sandbox molding sand

A sand box molding and preparation technology, which is applied to casting molding equipment, manufacturing tools, casting molds, etc., can solve the problems of insufficient strength, thermal stability, plasticity, air permeability, and poor collapse, and achieve easy demoulding and smooth inner wall Effect of low roughness and improved thermal stability

Inactive Publication Date: 2018-11-09
MAANSHAN YIFENG INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of insufficient strength and poor thermal stability, plasticity, air permeability and collapsibility in the pouring process of existing flask molding sand, the present invention provides a formulation and preparation process of flask molding sand, which enhances bonding It can effectively increase the strength of the molding sand, and at the same time improve the thermal stability, plasticity and air permeability of the molding sand. It is safe and reliable during use, and the inner wall is smooth and rough, which ensures the pass rate of the castings. Easy to demould, improve work efficiency

Method used

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  • Formula and preparation process for sandbox molding sand
  • Formula and preparation process for sandbox molding sand

Examples

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Comparison scheme
Effect test

Embodiment 1

[0034] A sand box molding sand formulation of the present embodiment is composed of the following components in parts by weight: the main particle material includes: 23 parts of clay sand, 25 parts of bentonite, and 8 parts of red coal powder; the powdery auxiliary material includes 0.1 part of lithium carbonate , 0.3 parts of black silicon carbide powder, 0.5 parts of -195C graphite, 8 parts of water, 0.5 parts of composite binder and 0.1 part of sorbitol. 2 O content is 0.5% by weight or less, K 2 The content of O is less than 0.5% by weight, the content of CaO is less than 0.5% by weight, the composite binder is a polyurethane binder, the particle type of black silicon carbide powder is 270 mesh, and the SiC content is 99.5%; the particle size of -195C graphite The type is 100 mesh, and the C content is 97.8%.

[0035] The sand box molding sand formulation preparation process of the present embodiment, such as figure 1 shown, including the following steps:

[0036] Step ...

Embodiment 2

[0044] A sand box molding sand formulation of the present embodiment is composed of the following components in parts by weight: the main particle material includes: 16 parts of clay sand, 30 parts of bentonite, and 10 parts of red coal powder; the powdery auxiliary material includes 0.1 part of lithium carbonate , 0.5 parts of black silicon carbide powder, 0.4 parts of -195C graphite, 6 parts of water, 0.8 parts of composite binder and 0.15 parts of sorbitol. 2 O content is 0.5% by weight or less, K 2 The content of O is less than 0.5% by weight, the content of CaO is less than 0.5% by weight, the composite binder is a polyurethane binder, the particle type of black silicon carbide powder is 300 mesh, and the SiC content is 99.4%; the particle size of -195C graphite The type is 110 mesh, and the C content is 98.5%.

[0045] The sand box molding sand formula preparation process of the present embodiment comprises the following steps:

[0046] Step S101, rolling and mixing

...

Embodiment 3

[0054] A sand box molding sand formula of the present embodiment is composed of the following components in parts by weight: the main particle material includes: 20 parts of clay sand, 28 parts of bentonite, and 7 parts of red coal powder; the powdery auxiliary material includes 0.15 parts of lithium carbonate , 0.6 parts of black silicon carbide powder, 0.8 parts of -195C graphite, 9 parts of water, 1 part of composite binder and 0.12 parts of sorbitol. 2 O content is 0.5% by weight or less, K 2 The content of O is less than 0.5% by weight, the content of CaO is less than 0.5% by weight, the composite binder is a modified resin binder, the particle size of black silicon carbide powder is 280 mesh, and the SiC content is 99.5%; -195C graphite The particle type is 120 mesh, and the C content is 99%.

[0055] The sand box molding sand formula preparation process of the present embodiment comprises the following steps:

[0056] Step S101, rolling and mixing

[0057] Clay sand,...

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Abstract

The invention discloses a formula and preparation process for sandbox molding sand, belonging to the technical field of casting. The formula comprises a granular main material and a powdery accessorymaterial. The granular main material comprises, by weight, 16 to 23 parts of clay sand, 20 to 30 parts of bentonite and 6 to 10 parts of anthracite powder. The powdery accessory material comprises, byweight, 0.1-0. 15 part of lithium carbonate, 0.3-0.8 part of black silicon carbide powder, 0.3-0.8 part of -195C graphite, 6-10 parts of water, 0.5-1 part of a composite adhesive and 0.1 to 0.5 partof sorbitol. The sandbox molding sand prepared according to the formula has good dispersibility and strong cohesiveness, and is effectively improved in strength and enhanced in thermal stability, plasticity and air permeability; the sandbox molding sand is safe and reliable in use, and an inner wall is smooth and has low roughness, so the yield of castings is good; in addition, the sandbox moldingsand has good collapsibility, so castings are easy to demould, and working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of casting, and more specifically relates to a formula and preparation process of sand box molding sand. Background technique [0002] Sand box molding sand is a material used for molding in sand casting. Molding sand plays an extremely important role in casting production. The casting waste caused by poor quality of molding sand accounts for about 30-50% of the total casting waste. The bonding ability of molding sand is an important indicator to measure the quality of molding sand formulation. The existing sand box molding sand adhesive can use water. For example, Chinese patent CN201610738936.3 discloses a molding sand formula, which consists of the following components in parts by weight: clay sand 16-23 parts, quartz sand 17-24 parts , 8 to 15 parts of bentonite, 5 to 8 parts of zeolite powder, 3 to 6 parts of rosin, 2 to 5 parts of gypsum powder, and 10 to 13 parts of water; Chinese patent CN2017109131...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00B22C1/02B22C1/22B22C5/06
CPCB22C1/00B22C1/02B22C1/22B22C5/06
Inventor 潘政桃张学伍
Owner MAANSHAN YIFENG INDAL GROUP
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