Die release agent and preparation method thereof

A technology of release agent and release powder, which is applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of ductility, film formation and poor adhesion, and achieve multiple demoulding times and high precision , the effect of long demoulding time

Active Publication Date: 2014-12-03
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This mold release agent has good slag resistance and good fire resistance, but its ductility, film formation and adhesion are poor

Method used

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  • Die release agent and preparation method thereof

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preparation example Construction

[0050] In the present invention, based on the parts by weight of the release powder, the parts by weight of the graphene are 0.1 to 5 parts, preferably 0.5 to 4 parts, more preferably 1 to 3 parts , most preferably 2 parts. In the present invention, the particle size of the graphene is preferably 0.5 micron to 1.2 micron, more preferably 0.8 micron to 1 micron. In the present invention, the raw material for preparing graphene is preferably biomass carbon source. In the present invention, the preparation method of described graphene preferably comprises the following steps:

[0051] 1), under the action of a catalyst, the biomass carbon source is subjected to catalytic treatment to obtain a first intermediate product, and the catalyst includes one or more of manganese chloride salts, iron compounds, cobalt compounds and nickel compounds Several;

[0052] 2) In the presence of a protective gas, the first intermediate product is heated from a first temperature to a second temp...

Embodiment 1

[0099] At 90° C., hydrolyzing corncobs in sulfuric acid for 10 minutes to obtain lignocellulose, the mass of the sulfuric acid being 3% of the mass of the corncobs;

[0100] At 70°C, the lignocellulose was subjected to acidic sulfite treatment for 1 hour to obtain porous cellulose, the pH value in the acidic sulfite treatment process was 1, the acid was sulfuric acid, and sulfite It is magnesium sulfite, the quality of the sulfuric acid is 4% of the quality of the lignocellulose, and the liquid-solid ratio is 2:1.

[0101] The obtained porous cellulose is bleached with hydrogen peroxide, the mass of the hydrogen peroxide is 5% of the mass of the porous cellulose, the bleaching temperature of the hydrogen peroxide bleaching is 100° C., and the bleaching time is 5 hours.

[0102] Stir the porous cellulose and manganese chloride at 20°C for 2 hours for catalytic treatment, the mass ratio of the manganese chloride and porous cellulose is 0.01:1; Drying at a low temperature to obt...

Embodiment 2

[0106] At 180°C, hydrolyzing corncobs in nitric acid for 10 hours to obtain lignocellulose, the mass of the nitric acid being 20% ​​of the mass of the corncobs;

[0107] At 180°C, the lignocellulose was subjected to acidic sulfite treatment for 6 hours to obtain porous cellulose, the pH value during the acidic sulfite treatment process was 7, the acid was sulfuric acid, and sulfite It is sodium sulfite, the quality of the sulfuric acid is 30% of the quality of the lignocellulose, and the liquid-solid ratio is 20:1.

[0108] The porous cellulose is bleached with hydrogen peroxide, the mass of the hydrogen peroxide is 5% of the mass of the porous cellulose, the bleaching temperature of the hydrogen peroxide bleach is 100° C., and the bleaching time is 5 hours.

[0109] Stir the porous cellulose and ferric nitrate at 180°C for 10 hours for catalytic treatment, the mass ratio of ferric nitrate and porous cellulose is 2:1; dry the obtained catalytically treated product at 120°C , ...

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Abstract

The invention discloses a die release agent. The die release agent comprises the following components in parts by weight: 5-15 parts of die release powder, 1-10 parts of an oil compound, 0.1-1 part of an emulsification agent, 70-90 parts of a solvent, 0.1-1 part of a defoaming agent and 0.1-5 parts of graphene. The invention provides a preparation method of the die release agent. The preparation method of the die release agent comprises the following steps: emulsifying the die release powder, the oil compound, the emulsification agent, the defoaming agent, the solvent and the graphene to obtain the die release agent. According to the die release agent, the graphene can be used for enabling the die release agent to form a relatively thin, hard and dense coating on the surface of a cavity, so that the direct contact between sand and a die can be effectively isolated; the die release agent is relatively good in extensibility, film formation property and adhesive force. In addition, a casting part prepared by the die release agent is relatively high in precision.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a release agent and a preparation method thereof. Background technique [0002] Thermosetting and chilled binders are widely used in foundry production. After the sand mold (core) is hardened, the mold is ejected. In order to reduce the mold ejection friction and ensure the quality of the mold and core, it is necessary to brush (spray) the mold release agent on the surface of the mold. The release agent is a functional substance between the mold and the sand core (type). The release agent can form a tough protective film on the surface of the mold to prevent direct contact between the sand core and the mold. Usually, the mold release agent is applied once, and the mold can be repeatedly demoulded many times, thereby increasing the service life of the mold. [0003] The release agent is mainly composed of powder, suspending agent, functional additive and solvent. At present, mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 唐一林祝建勋刘昭荐赵秀娟
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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