CN105855461A - Quartz-based expendable pattern paint modified by mica powder, for high-precision castings and preparation method of quartz-based expendable pattern paint - Google Patents
Quartz-based expendable pattern paint modified by mica powder, for high-precision castings and preparation method of quartz-based expendable pattern paint Download PDFInfo
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- CN105855461A CN105855461A CN201610359457.0A CN201610359457A CN105855461A CN 105855461 A CN105855461 A CN 105855461A CN 201610359457 A CN201610359457 A CN 201610359457A CN 105855461 A CN105855461 A CN 105855461A
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- mica powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses quartz-based expendable pattern paint modified by mica powder, for high-precision castings. The quartz-based expendable pattern paint is prepared from the following raw materials in parts by weight: 100-102 parts of quartz powder, 0.9-1.1 parts of modified starch, 0.9-1.1 parts of carboxymethyl cellulose, 2.4-2.6 parts of sodium bentonite, 0.9-1 part of mica powder, 0.8-0.9 part of tetrapod ZnO whiskers, 0.9-1.1 parts of silicasol, 10-13 parts of ethanol, an appropriate amount of water, 0.4-0.5 part of molybdenum disulfide, 1.2-1.5 parts of kyanite powder, and 0.3-0.5 part of nanometer crystalline cellulose. The molybdenum disulfide, the kyanite powder and the nanometer crystalline cellulose are used, so that the easy-applying performance of the paint is improved, small pits can also be uniformly applied, paint films are uniform and compact, and the surfaces of high-precision models can be filmed; the precision of the castings is high, the surface is bright and clean, and the nanometer crystalline cellulose is gasified to form uniform small holes when being casted, so that the air permeability is improved.
Description
Technical field
The present invention relates to lost foam paint technical field, particularly relate to a kind of high accuracy foundry goods mica powder modification quartz group lost mould coating and preparation method thereof.
Background technology
Lost foam casting is the foundry engieering of a kind of Near net shape, and coating is the key point of lost foam casting, and the quality of coating property is directly connected to the quality of foundry goods.Lost foam paint is typically made up of refractory aggregate, binding agent, suspending agent, carrier, additive.Silica flour is widely used on lost foam casting as refractory aggregate cheap and easy to get, but because sintering character is poor so that it is application receives certain restriction.And the principle that lost foam paint is at the beginning of design should sinter exactly, peel off again.If sintering character can be poor under pouring temperature for refractory aggregate, then can not form the liquid phase of q.s.So coating cannot form densification and have the sinter layer of sufficient intensity, bears incessantly molten metal washing away when cast, corrosion function, and molten metal can pass through coating erosion casting mold, and foundry goods is easily generated the defects such as scab.Even if not causing scab the most easily to produce coating be bonded at the phenomenon being not easily stripped on foundry goods.The major measure improving lost foam paint sintering character has: 1. introduce suitable sintering aid, utilizes the liquid phase that sintering aid is formed, and reaches the purpose accelerating material diffusion with acceleration of sintering；2. formed composite aggregate, fusing point reduction and the temperature starting to sinter by the refractory aggregate that fusing point is different also to decrease.If selecting suitable composite aggregate and proportioning, then coating can be made to produce a certain degree of sintering under pouring temperature.This problem uses mica powder to improve the sintering character of quartz group lost mould coating as sintering aid." mica powder impact on quartz group lost mould coating sintering character " literary composition have developed a kind of lost foam paint with high refractoriness and low fever's node, and this coating has good sintering character and stripping performance.
But mica bad dispersibility in coating, suspension are poor, easily cause the bending strength after sintering uneven, and stripping performance is the most uneven, and mica slabbing, can obstructing air holes, affect gas and discharges, cause bleb phenomenon, need improvement.
Additionally also need to improve the problems such as the hardness of coating, compactness, elevated temperature strength, crack resistance, gas permeability, bending strength, sag resistance, brushing performance, agglutinating property along with the progress of foundry engieering.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of high accuracy foundry goods mica powder modification quartz group lost mould coating and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of high accuracy foundry goods mica powder modification quartz group lost mould coating, is prepared by the raw materials in: silica flour 100-102, modified starch 0.9-1.1, carboxymethylcellulose calcium 0.9-1.1, sodium bentonite 2.4-2.6, mica powder 0.9-1, four acicular type zinc oxide crystal whisker 0.8-0.9, Ludox 0.9-1.1, ethanol 10-13, water are appropriate, molybdenum bisuphide 0.4-0.5, aquamaine stone flour 1.2-1.5, nanocrystal cellulose 0.3-0.5.
The preparation method of described high accuracy foundry goods mica powder modification quartz group lost mould coating, comprises the following steps:
(1) Ludox is added in ethanol, stir, add mica powder to stir, be heated to 60-70 DEG C, add four acicular type zinc oxide crystal whisker while stirring, it is heated to 70-75 DEG C, ultrasonic disperse 3-4 minute, continues stirring complete to ethanol volatilization, pulverizes, cross 100-150 mesh sieve, obtain modified micaceous powder；
(2) by sodium bentonite, molybdenum bisuphide, aquamaine stone flour, the mixing of nanocrystal cellulose, grind uniformly, obtain mixed material；
(3) modified starch, carboxymethylcellulose calcium are added to the water, stir, add described modified micaceous powder and the mixed material of (2nd) step, stir, obtain mixed material；
(4) described mixed material and other leftover materials are mixed into pasty state, to obtain final product.
The invention have the advantage that the present invention uses Ludox, four acicular type zinc oxide crystal whisker to be modified mica powder, define on mica powder surface nano silicon and and four acicular type zinc oxide crystal whisker, the dispersion stabilization making mica powder improves, and whisker can improve the caking property of mica powder and silica flour, improve cracking resistance, there is whisker to support after sintering and define uniform pore, promote that gas is discharged, reduce bleb.By using molybdenum bisuphide, aquamaine stone flour, nanocrystal cellulose, blending and modifying is carried out with sodium bentonite, make molybdenum bisuphide, nanocrystal cellulose adsorbs at aquamaine stone flour equably, in the surface of sodium bentonite and internal void, improve bentonitic suspension, adhesiveness and lubricity, thus improve the easy brushability of coating, little pit also can be brushed uniformly, film even compact, can be at the high model surface homogeneous film formation of precision, the precision making foundry goods is high, any surface finish, when casting, nanocrystal fibrin gasification forms uniform aperture, improve gas permeability, aquamaine stone flour improves the heat resistance of film.
Detailed description of the invention
A kind of high accuracy foundry goods mica powder modification quartz group lost mould coating, is made up of the raw material of following weight portion (kilogram): silica flour 100, modified starch 0.9, carboxymethylcellulose calcium 0.9, sodium bentonite 2.4, mica powder 0.9, four acicular type zinc oxide crystal whisker 0.8, Ludox 0.9, ethanol 10, water are appropriate, molybdenum bisuphide 0.4, aquamaine stone flour 1.2, nanocrystal cellulose 0.3.5.
The preparation method of described high accuracy foundry goods mica powder modification quartz group lost mould coating, comprises the following steps:
(1) Ludox is added in ethanol, stir, add mica powder and stir, be heated to 60 DEG C, add four acicular type zinc oxide crystal whisker while stirring, be heated to 70 DEG C, ultrasonic disperse 3 minutes, continues stirring complete to ethanol volatilization, pulverize, cross 100 mesh sieves, obtain modified micaceous powder；
(2) by sodium bentonite, molybdenum bisuphide, aquamaine stone flour, the mixing of nanocrystal cellulose, grind uniformly, obtain mixed material；
(3) modified starch, carboxymethylcellulose calcium are added to the water, stir, add described modified micaceous powder and the mixed material of (2nd) step, stir, obtain mixed material；
(4) described mixed material and other leftover materials are mixed into pasty state, to obtain final product.
Being sintered at 1500 DEG C by this embodiment lost foam paint, observed by microscope, internal a small amount of macroscopic void and the most tiny small holes, in a block entirety, fissility has reached I grade, and bending strength is 7.5MPa.
Claims (2)
1. a high accuracy foundry goods mica powder modification quartz group lost mould coating, it is characterised in that: it is prepared by the raw materials in: silica flour 100-102, modified starch 0.9-1.1, carboxymethylcellulose calcium 0.9-1.1, sodium bentonite 2.4-2.6, mica powder 0.9-1, four acicular type zinc oxide crystal whisker 0.8-0.9, Ludox 0.9-1.1, ethanol 10-13, water are appropriate, molybdenum bisuphide 0.4-0.5, aquamaine stone flour 1.2-1.5, nanocrystal cellulose 0.3-0.5.
The high accuracy foundry goods preparation method of mica powder modification quartz group lost mould coating the most according to claim 1, it is characterised in that comprise the following steps:
(1) Ludox is added in ethanol, stir, add mica powder to stir, be heated to 60-70 DEG C, add four acicular type zinc oxide crystal whisker while stirring, it is heated to 70-75 DEG C, ultrasonic disperse 3-4 minute, continues stirring complete to ethanol volatilization, pulverizes, cross 100-150 mesh sieve, obtain modified micaceous powder；
(2) by sodium bentonite, molybdenum bisuphide, aquamaine stone flour, the mixing of nanocrystal cellulose, grind uniformly, obtain mixed material；
(3) modified starch, carboxymethylcellulose calcium are added to the water, stir, add described modified micaceous powder and the mixed material of (2nd) step, stir, obtain mixed material；
(4) described mixed material and other leftover materials are mixed into pasty state, to obtain final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610359457.0A CN105855461A (en) | 2016-05-27 | 2016-05-27 | Quartz-based expendable pattern paint modified by mica powder, for high-precision castings and preparation method of quartz-based expendable pattern paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610359457.0A CN105855461A (en) | 2016-05-27 | 2016-05-27 | Quartz-based expendable pattern paint modified by mica powder, for high-precision castings and preparation method of quartz-based expendable pattern paint |
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| CN105855461A true CN105855461A (en) | 2016-08-17 |
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| CN201610359457.0A Withdrawn CN105855461A (en) | 2016-05-27 | 2016-05-27 | Quartz-based expendable pattern paint modified by mica powder, for high-precision castings and preparation method of quartz-based expendable pattern paint |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1225840B1 (en) * | 1999-11-01 | 2006-04-26 | JENERIC/PENTRON Incorporated | Plunger for a pressing furnace |
| CN103878300A (en) * | 2014-03-03 | 2014-06-25 | 安徽华通铸业有限公司 | Paint composition for steel casting surfaces |
| CN103952056A (en) * | 2014-05-21 | 2014-07-30 | 航天材料及工艺研究所 | High-temperature-resistant lubricating anticorrosive aluminum paint and preparation method thereof |
| CN104117626A (en) * | 2014-06-26 | 2014-10-29 | 芜湖市鸿坤汽车零部件有限公司 | Zircon powder alcohol-based casting coating and preparing method thereof |
| CN105131665A (en) * | 2015-08-03 | 2015-12-09 | 宜兴市巨人涂料有限公司 | Aqueous inorganic zinc-rich prime coat and preparation method thereof |
-
2016
- 2016-05-27 CN CN201610359457.0A patent/CN105855461A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1225840B1 (en) * | 1999-11-01 | 2006-04-26 | JENERIC/PENTRON Incorporated | Plunger for a pressing furnace |
| CN103878300A (en) * | 2014-03-03 | 2014-06-25 | 安徽华通铸业有限公司 | Paint composition for steel casting surfaces |
| CN103952056A (en) * | 2014-05-21 | 2014-07-30 | 航天材料及工艺研究所 | High-temperature-resistant lubricating anticorrosive aluminum paint and preparation method thereof |
| CN104117626A (en) * | 2014-06-26 | 2014-10-29 | 芜湖市鸿坤汽车零部件有限公司 | Zircon powder alcohol-based casting coating and preparing method thereof |
| CN105131665A (en) * | 2015-08-03 | 2015-12-09 | 宜兴市巨人涂料有限公司 | Aqueous inorganic zinc-rich prime coat and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 康健 等: "云母粉对石英基消失模涂料烧结性能的影响", 《特种铸造及有色合金》 * |
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Application publication date: 20160817 |