CN106141075A - A kind of sand casting releasing agent utilizing precipitated silica to prepare - Google Patents
A kind of sand casting releasing agent utilizing precipitated silica to prepare Download PDFInfo
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- CN106141075A CN106141075A CN201610737587.3A CN201610737587A CN106141075A CN 106141075 A CN106141075 A CN 106141075A CN 201610737587 A CN201610737587 A CN 201610737587A CN 106141075 A CN106141075 A CN 106141075A
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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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Abstract
The invention discloses a kind of sand casting releasing agent utilizing precipitated silica to prepare, relate to precipitated silica technical field, it is made up of the raw material of following parts by weight: precipitated silica 15 20 parts, cycloaliphatic epoxy resin 15 20 parts, melmac 15 20 parts, volcanic ash 8 12 parts, petroleum coke 59 parts, nitrocotton 47 parts, castor oil hydrogenated 47 parts, asbestos wool 36 parts, sulphate aluminium cement 36 parts, polyacrylamide 24 parts, palladium powder 24 parts, sulfurized lard 24 parts, nanometer titanium dioxide 12 parts, nanometer rubber powder 12 parts, Nano graphite powder 12 parts, aluminium powder 0.5 1 parts, rice chaff ash 0.5 1 parts, butyl acetate 20 25 parts, n-butyl alcohol 20 25 parts.Releasing agent direct spraying of the present invention is on sand mold, it is possible to forms one layer of isolating membrane at mould surface, thus plays stripping result；And this isolating membrane adhesive force is strong, heat-resisting quantity and wearability good, will not melt and gasify in foundry goods casting cycle.
Description
Technical field:
The present invention relates to precipitated silica technical field, be specifically related to a kind of sand mold utilizing precipitated silica to prepare
Casting releasing agent.
Background technology:
Sand casting, refers to produce the casting method of foundry goods in sand mold.Modeling Material valency used by sand casting
Honest and clean being easy to get, Casting mold manufacturing is easy, to the single-piece production of foundry goods, produces by batch and produces in a large number and all adapt to, the most always
It it is the basic technology in Foundry Production.Sand casting releasing agent is that demoulding functions powder adds suspending agent, function additive, group of solvents
Become, molding after sand mold hardening, for reducing molding frictional force and ensureing casting quality, need to adhere to a pull-up mould at mould surface
Agent.But heat-resisting quantity is poor, stripping result is general shortcoming that the sand casting releasing agent used at present exists, meets high temperature melting and merges
Easily pneumatolytic metamorphism after gold liquid, thus cause the phenomenon of sand holes or Sand Penetration, not only increase the difficulty of foundry goods subsequent fine processing
And workload, and increase the scrappage of foundry goods, improve production cost.
Summary of the invention:
The technical problem to be solved is to provide that a kind of adhesive force is good, heat-resisting quantity is strong and stripping result is good
Utilize sand casting releasing agent prepared by precipitated silica.
The technical problem to be solved uses following technical scheme to realize:
A kind of sand casting releasing agent utilizing precipitated silica to prepare, is made up of the raw material of following parts by weight:
Precipitated silica 15-20 part, cycloaliphatic epoxy resin 15-20 part, melmac 15-20 part, volcanic ash
8-12 part, petroleum coke 5-9 part, nitrocotton 4-7 part, castor oil hydrogenated 4-7 part, asbestos wool 3-6 part, sulphate aluminium cement 3-6 part,
Polyacrylamide 2-4 part, palladium powder 2-4 part, sulfurized lard 2-4 part, nanometer titanium dioxide 1-2 part, nanometer rubber powder 1-2 part,
Nano graphite powder 1-2 part, aluminium powder 0.5-1 part, rice chaff ash 0.5-1 part, butyl acetate 20-25 part, n-butyl alcohol 20-25 part.
Its preparation method comprises the steps:
(1) in butyl acetate, add cycloaliphatic epoxy resin, petroleum coke and sulfurized lard, and be heated to reflux state guarantor
Temperature 30min, then add nanometer titanium dioxide, nanometer rubber powder and Nano graphite powder while hot, it is sufficiently mixed, obtains material I；
(2) in n-butyl alcohol, add melmac and castor oil hydrogenated, and be heated to reflux state insulation 15min,
Add precipitated silica, volcanic ash and sulphate aluminium cement, continue to be heated to reflux state insulation 15min, obtain material
II；
(3) adding material I, nitrocotton, asbestos wool, palladium powder while hot in material II, insulation grinds 30min, so
Rear natural cooling, adds polyacrylamide, aluminium powder and rice chaff ash after temperature is down to 55-60 DEG C, and gained mixture adds ball milling
In machine, it is milled to fineness less than 30 μm.
Described precipitated silica carries out modification before using, and its method of modifying is: added by 20 parts of precipitated silicas
Enter in 3 times of weight water, fully dispersed after stand 30min, add 3 parts of hydrogenated rosin glycerides and 1 part of Semen Camelliae powder, under stirring
Being heated to reflux state isothermal holding 15min, be subsequently adding 2 parts of pentaerythritol triacrylates and 1 part of emulsified silicone oil, mixing is all
After even under microwave frequency 2450MHz, power 700W microwave treatment 5min, gained mixture sends into freezer dryer, through fully
Crushed after being dried becomes powder, finally calcines 3h at 500-550 DEG C.
Precipitated silica passes through modification, not only makes it be become lipophile from hydrophilic, improves it in organic facies
Dispersed homogeneous degree, it is to avoid agglomeration produce；Strengthen it reinforcing, to improve the usability of releasing agent as reinforcing agent simultaneously
Energy.
The invention has the beneficial effects as follows: the present invention is with precipitated silica as primary raw material, by modification and auxiliary
Preparing sand casting releasing agent with multiple auxiliary agent, this releasing agent direct spraying is on sand mold, it is possible to form one layer at mould surface
Isolating membrane, thus play stripping result；And this isolating membrane adhesive force is strong, heat-resisting quantity and wearability good, cast at foundry goods
Journey will not melt and gasify, thus avoid the occurrence of sand hole and Sand Penetration problem.
Detailed description of the invention:
For the technological means making the present invention realize, creation characteristic, reach purpose and be easy to understand with effect, below knot
Close specific embodiment, the present invention is expanded on further.
Embodiment 1
(1) in 25 parts of butyl acetates, add 20 parts of cycloaliphatic epoxy resins, 8 parts of petroleum cokes and 3 parts of sulfurized lard, and add
Heat to reflux state is incubated 30min, then adds 1 part of nanometer titanium dioxide, 1 part of nanometer rubber powder and 1 part of Nano graphite powder while hot, fully
Mixing, obtains material I；
(2) in 20 parts of n-butyl alcohol, add 15 parts of melmacs and 4 parts of castor oil hydrogenated, and be heated to reflux state
Insulation 15min, adds 15 parts of precipitated silicas, 8 parts of volcanic ash and 3 parts of sulphate aluminium cements, continues to be heated to the shape that refluxes
State insulation 15min, obtains material II；
(3) adding material I, 4 parts of nitrocottons, 4 parts of asbestos wools, 2 parts of palladium powders while hot in material II, insulation is ground
30min, then natural cooling, add 2 parts of polyacrylamides, 1 part of aluminium powder and 0.5 part of rice chaff ash after temperature is down to 55-60 DEG C,
Gained mixture adds in ball mill, is milled to fineness less than 30 μm.
The modification of precipitated silica: 20 parts of precipitated silicas are added in 3 times of weight water, fully dispersed rear quiet
Put 30min, add 3 parts of hydrogenated rosin glycerides and 1 part of Semen Camelliae powder, under stirring, be heated to reflux state isothermal holding
15min, is subsequently adding 2 parts of pentaerythritol triacrylates and 1 part of emulsified silicone oil, after mix homogeneously in microwave frequency 2450MHz,
Microwave treatment 5min under power 700W, gained mixture send into freezer dryer, become powder through abundant crushed after being dried, finally in
3h is calcined at 500-550 DEG C.
Embodiment 2
(1) in 20 parts of butyl acetates, add 15 parts of cycloaliphatic epoxy resins, 5 parts of petroleum cokes and 3 parts of sulfurized lard, and add
Heat to reflux state is incubated 30min, then adds 2 parts of nanometer titanium dioxides, 1 part of nanometer rubber powder and 1 part of Nano graphite powder while hot, fully
Mixing, obtains material I；
(2) in 25 parts of n-butyl alcohol, add 20 parts of melmacs and 6 parts of castor oil hydrogenated, and be heated to reflux state
Insulation 15min, adds 20 parts of precipitated silicas, 8 parts of volcanic ash and 3 parts of sulphate aluminium cements, continues to be heated to the shape that refluxes
State insulation 15min, obtains material II；
(3) adding material I, 5 parts of nitrocottons, 3 parts of asbestos wools, 2 parts of palladium powders while hot in material II, insulation is ground
30min, then natural cooling, add 3 parts of polyacrylamides, 0.5 part of aluminium powder and 1 part of rice chaff ash after temperature is down to 55-60 DEG C,
Gained mixture adds in ball mill, is milled to fineness less than 30 μm.
The modification of precipitated silica: 20 parts of precipitated silicas are added in 3 times of weight water, fully dispersed rear quiet
Put 30min, add 3 parts of hydrogenated rosin glycerides and 1 part of Semen Camelliae powder, under stirring, be heated to reflux state isothermal holding
15min, is subsequently adding 2 parts of pentaerythritol triacrylates and 1 part of emulsified silicone oil, after mix homogeneously in microwave frequency 2450MHz,
Microwave treatment 5min under power 700W, gained mixture send into freezer dryer, become powder through abundant crushed after being dried, finally in
3h is calcined at 500-550 DEG C.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.The technology of the industry
Personnel, it should be appreciated that the present invention is not restricted to the described embodiments, simply illustrating this described in above-described embodiment and description
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these become
Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and
Equivalent defines.
Claims (3)
1. the sand casting releasing agent that a kind utilizes precipitated silica to prepare, it is characterised in that former by following parts by weight
Material is made:
Precipitated silica 15-20 part, cycloaliphatic epoxy resin 15-20 part, melmac 15-20 part, volcanic ash 8-12
Part, petroleum coke 5-9 part, nitrocotton 4-7 part, castor oil hydrogenated 4-7 part, asbestos wool 3-6 part, sulphate aluminium cement 3-6 part, poly-third
Acrylamide 2-4 part, palladium powder 2-4 part, sulfurized lard 2-4 part, nanometer titanium dioxide 1-2 part, nanometer rubber powder 1-2 part, nanometer
Graphite powder 1-2 part, aluminium powder 0.5-1 part, rice chaff ash 0.5-1 part, butyl acetate 20-25 part, n-butyl alcohol 20-25 part.
The sand casting releasing agent utilizing precipitated silica to prepare the most according to claim 1, it is characterised in that its system
Preparation Method comprises the steps:
(1) in butyl acetate, add cycloaliphatic epoxy resin, petroleum coke and sulfurized lard, and be heated to reflux state insulation
30min, then add nanometer titanium dioxide, nanometer rubber powder and Nano graphite powder while hot, it is sufficiently mixed, obtains material I；
(2) in n-butyl alcohol, add melmac and castor oil hydrogenated, and be heated to reflux state insulation 15min, then add
Enter precipitated silica, volcanic ash and sulphate aluminium cement, continue to be heated to reflux state insulation 15min, obtain material II；
(3) adding material I, nitrocotton, asbestos wool, palladium powder while hot in material II, insulation grinds 30min, then certainly
So cooling, adds polyacrylamide, aluminium powder and rice chaff ash after temperature is down to 55-60 DEG C, and gained mixture adds in ball mill,
It is milled to fineness less than 30 μm.
The sand casting releasing agent utilizing precipitated silica to prepare the most according to claim 1 and 2, it is characterised in that:
Described precipitated silica carries out modification before using, and its method of modifying is: 20 parts of precipitated silicas are added 3 times of weight
In water, fully dispersed after stand 30min, add 3 parts of hydrogenated rosin glycerides and 1 part of Semen Camelliae powder, be heated to back under stirring
Stream mode isothermal holding 15min, is subsequently adding 2 parts of pentaerythritol triacrylates and 1 part of emulsified silicone oil, in micro-after mix homogeneously
Microwave treatment 5min under wave frequency 2450MHz, power 700W, gained mixture sends into freezer dryer, through the most dried powder
It is broken into powder, at 500-550 DEG C, finally calcines 3h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610737587.3A CN106141075A (en) | 2016-08-27 | 2016-08-27 | A kind of sand casting releasing agent utilizing precipitated silica to prepare |
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| CN201610737587.3A CN106141075A (en) | 2016-08-27 | 2016-08-27 | A kind of sand casting releasing agent utilizing precipitated silica to prepare |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138677A (en) * | 2017-07-08 | 2017-09-08 | 安徽雪雨洁具有限公司 | A kind of tap casting sand core is made of Sand sticking-resistant, anti-burning into sand additive |
| CN107511448A (en) * | 2017-08-03 | 2017-12-26 | 天能电池集团有限公司 | A kind of lead accumulator grid casting releasing agent and preparation method thereof |
| CN108300541A (en) * | 2017-01-12 | 2018-07-20 | 遵义航天新力精密铸锻有限公司 | One kind being molded lubricant releasing agent for forging extruding |
| CN108907074A (en) * | 2018-07-16 | 2018-11-30 | 昆山帝邦铸造科技有限公司 | A kind of anti-oxidation release agent and preparation method thereof and application method |
| CN109468026A (en) * | 2018-11-21 | 2019-03-15 | 芜湖春风新材料有限公司 | A kind of guarantor's mould agent coating and preparation method thereof |
| CN110756732A (en) * | 2019-12-03 | 2020-02-07 | 安徽省含山县皖中减速机械有限公司 | Casting process for improving casting defects of speed reducer pin gear shell |
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| CN101691226A (en) * | 2009-10-28 | 2010-04-07 | 四川大学 | Method for comprehensively utilizing polysilicon by-product with low cost |
| US20150246389A1 (en) * | 2013-06-17 | 2015-09-03 | Instytut Odlewnictwa | Composition of a ceramic layer for manufacturing a casting mould and other products |
| CN104959530A (en) * | 2015-06-18 | 2015-10-07 | 和县科嘉阀门铸造有限公司 | Nano titanium dioxide improved pasty demolding agent for valve casting |
| CN105014005A (en) * | 2015-06-18 | 2015-11-04 | 和县科嘉阀门铸造有限公司 | Nanosilicon dioxide modified paste type releasing agent for valve casting |
| CN105149498A (en) * | 2015-08-21 | 2015-12-16 | 无锡乐华自动化科技有限公司 | Releasing agent for casting |
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- 2016-08-27 CN CN201610737587.3A patent/CN106141075A/en active Pending
Patent Citations (5)
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| CN101691226A (en) * | 2009-10-28 | 2010-04-07 | 四川大学 | Method for comprehensively utilizing polysilicon by-product with low cost |
| US20150246389A1 (en) * | 2013-06-17 | 2015-09-03 | Instytut Odlewnictwa | Composition of a ceramic layer for manufacturing a casting mould and other products |
| CN104959530A (en) * | 2015-06-18 | 2015-10-07 | 和县科嘉阀门铸造有限公司 | Nano titanium dioxide improved pasty demolding agent for valve casting |
| CN105014005A (en) * | 2015-06-18 | 2015-11-04 | 和县科嘉阀门铸造有限公司 | Nanosilicon dioxide modified paste type releasing agent for valve casting |
| CN105149498A (en) * | 2015-08-21 | 2015-12-16 | 无锡乐华自动化科技有限公司 | Releasing agent for casting |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108300541A (en) * | 2017-01-12 | 2018-07-20 | 遵义航天新力精密铸锻有限公司 | One kind being molded lubricant releasing agent for forging extruding |
| CN107138677A (en) * | 2017-07-08 | 2017-09-08 | 安徽雪雨洁具有限公司 | A kind of tap casting sand core is made of Sand sticking-resistant, anti-burning into sand additive |
| CN107511448A (en) * | 2017-08-03 | 2017-12-26 | 天能电池集团有限公司 | A kind of lead accumulator grid casting releasing agent and preparation method thereof |
| CN108907074A (en) * | 2018-07-16 | 2018-11-30 | 昆山帝邦铸造科技有限公司 | A kind of anti-oxidation release agent and preparation method thereof and application method |
| CN109468026A (en) * | 2018-11-21 | 2019-03-15 | 芜湖春风新材料有限公司 | A kind of guarantor's mould agent coating and preparation method thereof |
| CN110756732A (en) * | 2019-12-03 | 2020-02-07 | 安徽省含山县皖中减速机械有限公司 | Casting process for improving casting defects of speed reducer pin gear shell |
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Application publication date: 20161123 |