CN108246968A - A kind of formula of the special-purpose water-based dip-coating paint of precoated sand - Google Patents
A kind of formula of the special-purpose water-based dip-coating paint of precoated sand Download PDFInfo
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- CN108246968A CN108246968A CN201711472543.3A CN201711472543A CN108246968A CN 108246968 A CN108246968 A CN 108246968A CN 201711472543 A CN201711472543 A CN 201711472543A CN 108246968 A CN108246968 A CN 108246968A
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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
Abstract
The present invention provides a kind of formula of the special-purpose water-based dip-coating paint of precoated sand, including refractory aggregate, binding agent, suspending agent, surfactant and carrier；Refractory aggregate includes mullite, iron oxide red, lithium lime stone and ball clay powder；Binding agent includes polyvinyl alcohol and Ludox；Suspending agent includes lithium bentonite and aluminium-magnesium silicate；Surfactant includes aqueous defoamer, wetting agent and bleeding agent.Water based paint made from formula provided by the invention make precoated sand cast sand core surface quality be improved significantly, sand core any surface finish, roughness is low, at the same be formulated in also contain wetting agent, the surface tension of coating can be reduced, improve the adhesive force of water based paint.
Description
Technical field
The present invention relates to precoated sand casting technical field of coatings more particularly to a kind of precoated sand special-purpose water-based dip-coating paints
Formula.
Background technology
At present, in moulding, core preparation process, due to precoated sand good moldability, sand core strength is high, clear-cut, size
Precision is high, most complicated shell core can be manufactured, so at home and abroad having obtained quick development.Now, precoated sand extensively should
For industries such as automobile, diesel engine, hydraulic parts, the production requirement of various complex precise casting can be met.
The characteristics of overlay film sand shell core coating is：(1) because shell core grit size is thin：General 70/140, surface hydrophobic is strong,
Thus coating has very strong permeability, while shell core is complex-shaped and sand core is thin, is often surrounded by molten metal, therefore coating should
With remarkable anti-sand washing and anti-sticking grittiness；(2) dimensional accuracy of size shell core cast and surface roughness are required to very high, coating
Anti-drip and it is anti-accumulation property will height；One layer thin of smooth and uniform coating is formed on shell core surface, covering power is strong, divides
It dissipates property and adhesion is good.
In " a kind of free of contamination water-based dip applicating paint " that is 200610046059.X in number of patent application, one kind is disclosed
Water-based dip applicating paint：" it is by zirconium English powder 17-30%, Brown Alundum 20-35%, mullite 5-15%, graphite 5-15%, polyethylene
Alcohol 1-4%, suspending agent 1.5-3.5% and water 30-45% are formed.Wherein, polyvinyl alcohol is binding agent, suspending agent by illite,
Sepiolite and bentonit presses 1:0.5:0.5 is made." above-mentioned patent content is disadvantageous in that：
(1) up to 30% zirconium English powder has been used, China's zirconium English powder resource shortage is most of to rely on import, and price is held high
It is expensive, cause coating raw material limited source, cost increases；
(2) polyvinyl alcohol organic binder bond is used alone, the elevated temperature strength of coating is low, the energy of coating anti-burnon and anti-sand
Force difference.
Invention content
The present invention is exactly to be directed to more than technical problem, provides a kind of formula of the special-purpose water-based dip-coating paint of precoated sand.
The present invention to achieve the above object, using following technical scheme：A kind of special-purpose water-based dip-coating paint of precoated sand is matched
Side, which is characterized in that including refractory aggregate, binding agent, suspending agent, surfactant and carrier；
The parts by weight of each raw material are respectively in the refractory aggregate：Mullite 20-23 parts by weight, iron oxide red 7-10 weight
Part, lithium lime stone 18-22 parts by weight and ball clay powder 5-8 parts by weight；
The parts by weight of each raw material are respectively in the binding agent：Polyvinyl alcohol 1.0-2.2 parts by weight and Ludox 1.2-1.5
Parts by weight；
The parts by weight of each raw material are respectively in the suspending agent：Lithium bentonite 2-3 parts by weight and aluminium-magnesium silicate 1.5-2.5
Parts by weight；
The parts by weight of each raw material are respectively in the surfactant：Aqueous defoamer 0.2-0.3 parts by weight, wetting agent
0.1-0.2 parts by weight and bleeding agent 0.1-0.15 parts by weight；
The parts by weight of the carrier are：40-45 parts by weight.
The carrier is softened water.
The beneficial effects of the invention are as follows：When in use, coating is relatively thin for coating provided by the invention, the oxidation added in formula
Iron oxide red has superior fast light, high temperature resistance, can effectively prevent sand core from cracking and generating vein defect；The lithium lime stone of addition
It is larger with binding agent polyvinyl alcohol affinity, the intensity of coating and being coated with property can be effectively improved so that be not easy after coated and dried
Bubble comes off, and the anti-burnon better performances of coating；The Ludox of addition can effectively keep the elevated temperature strength of coating, prevent
Slag inclusion phenomenon caused by dope layer comes off；The lithium bentonite and aluminium-magnesium silicate of addition can effectively improve the suspension effect of coating
Fruit prevents coating from generating precipitation；The surface quality of sand core that water based paint made from this formula makes precoated sand cast obtains significantly
Improve, sand core any surface finish, roughness is low, while also contains wetting agent in being formulated, and can reduce the surface tension of coating, improves water
The adhesive force of base coating.
Specific embodiment
With reference to embodiment, the invention will be further described：
A kind of formula of the special-purpose water-based dip-coating paint of precoated sand, including refractory aggregate, binding agent, suspending agent, surface-active
Agent and carrier；
The parts by weight of each raw material are respectively in the refractory aggregate：Mullite 20-23 parts by weight, iron oxide red 7-10 weight
Part, lithium lime stone 18-22 parts by weight and ball clay powder 5-8 parts by weight；
The parts by weight of each raw material are respectively in the binding agent：Polyvinyl alcohol 1.0-2.2 parts by weight and Ludox 1.2-1.5
Parts by weight；
The parts by weight of each raw material are respectively in the suspending agent：Lithium bentonite 2-3 parts by weight and aluminium-magnesium silicate 1.5-2.5
Parts by weight；
The parts by weight of each raw material are respectively in the surfactant：Aqueous defoamer 0.2-0.3 parts by weight, wetting agent
0.1-0.2 parts by weight and bleeding agent 0.1-0.15 parts by weight；
The parts by weight of the carrier are：40-45 parts by weight.
The carrier is softened water.
The formula of the 1 special-purpose water-based dip-coating paint of a kind of precoated sand of embodiment, including refractory aggregate, binding agent, suspending agent, table
Face activating agent and carrier；
The parts by weight of each raw material are respectively in the refractory aggregate：20 parts by weight of mullite, 7 parts by weight of iron oxide red, lithium
5 parts by weight of 18 parts by weight of lime stone and ball clay powder；
The parts by weight of each raw material are respectively in the binding agent：1.2 parts by weight of 1.0 parts by weight of polyvinyl alcohol and Ludox；
The parts by weight of each raw material are respectively in the suspending agent：1.5 weight of 2 parts by weight of lithium bentonite and aluminium-magnesium silicate
Part；
The parts by weight of each raw material are respectively in the surfactant：0.2 parts by weight of aqueous defoamer, 0.1 weight of wetting agent
Measure 0.1 parts by weight of part and bleeding agent；
The parts by weight of the carrier are：40 parts by weight.
The carrier is softened water.
The formula of the 2 special-purpose water-based dip-coating paint of a kind of precoated sand of embodiment, including refractory aggregate, binding agent, suspending agent, table
Face activating agent and carrier；
The parts by weight of each raw material are respectively in the refractory aggregate：23 parts by weight of mullite, 10 parts by weight of iron oxide red, lithium
8 parts by weight of 22 parts by weight of lime stone and ball clay powder；
The parts by weight of each raw material are respectively in the binding agent：1.5 parts by weight of 2.2 parts by weight of polyvinyl alcohol and Ludox；
The parts by weight of each raw material are respectively in the suspending agent：2.5 weight of 3 parts by weight of lithium bentonite and aluminium-magnesium silicate
Part；
The parts by weight of each raw material are respectively in the surfactant：0.3 parts by weight of aqueous defoamer, 0.2 weight of wetting agent
Measure 0.15 parts by weight of part and bleeding agent；
The parts by weight of the carrier are：45 parts by weight.
The carrier is softened water.
A kind of formula of the 3 special-purpose water-based dip-coating paint of precoated sand of embodiment, including refractory aggregate, binding agent, suspending agent,
Surfactant and carrier；
The parts by weight of each raw material are respectively in the refractory aggregate：21 parts by weight of mullite, 8 parts by weight of iron oxide red, lithium
6 parts by weight of 20 parts by weight of lime stone and ball clay powder；
The parts by weight of each raw material are respectively in the binding agent：1.3 parts by weight of 1.6 parts by weight of polyvinyl alcohol and Ludox；
The parts by weight of each raw material are respectively in the suspending agent：2 weight of 2.5 parts by weight of lithium bentonite and aluminium-magnesium silicate
Part；
The parts by weight of each raw material are respectively in the surfactant：0.25 parts by weight of aqueous defoamer, wetting agent 0.15
0.12 parts by weight of parts by weight and bleeding agent；
The parts by weight of the carrier are：42 parts by weight.
The carrier is softened water.
The present invention is exemplarily described above, it is clear that present invention specific implementation is not subject to the restrictions described above,
As long as it employs the various improvement of inventive concept and technical scheme of the present invention progress or not improved directly applies to other fields
It closes, within protection scope of the present invention.
Claims (2)
1. a kind of formula of the special-purpose water-based dip-coating paint of precoated sand, which is characterized in that including refractory aggregate, binding agent, suspending agent,
Surfactant and carrier；
The parts by weight of each raw material are respectively in the refractory aggregate：Mullite 20-23 parts by weight, iron oxide red 7-10 parts by weight,
Lithium lime stone 18-22 parts by weight and ball clay powder 5-8 parts by weight；
The parts by weight of each raw material are respectively in the binding agent：Polyvinyl alcohol 1.0-2.2 parts by weight and Ludox 1.2-1.5 weight
Part；
The parts by weight of each raw material are respectively in the suspending agent：Lithium bentonite 2-3 parts by weight and aluminium-magnesium silicate 1.5-2.5 weight
Part；
The parts by weight of each raw material are respectively in the surfactant：Aqueous defoamer 0.2-0.3 parts by weight, wetting agent 0.1-
0.2 parts by weight and bleeding agent 0.1-0.15 parts by weight；
The parts by weight of the carrier are：40-45 parts by weight.
A kind of 2. formula of the special-purpose water-based dip-coating paint of precoated sand according to claim 1, which is characterized in that the carrier
For softened water.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711472543.3A CN108246968B (en) | 2017-12-29 | 2017-12-29 | A kind of formula of the special-purpose water-based dip-coating paint of precoated sand |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711472543.3A CN108246968B (en) | 2017-12-29 | 2017-12-29 | A kind of formula of the special-purpose water-based dip-coating paint of precoated sand |
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| CN108246968A true CN108246968A (en) | 2018-07-06 |
| CN108246968B CN108246968B (en) | 2019-12-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396327A (en) * | 2018-12-18 | 2019-03-01 | 苏州美迈快速制造技术有限公司 | A kind of water-based dip applicating paint and preparation method thereof for 3D printing sand mold |
| CN111774519A (en) * | 2020-07-14 | 2020-10-16 | 老河口金琳汽配制造有限公司 | Special water-based paint for precoated sand |
| CN115069970A (en) * | 2022-06-17 | 2022-09-20 | 青州市珺凯工业装备有限公司 | Sand sticking preventing coating for large steel castings and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396327A (en) * | 2018-12-18 | 2019-03-01 | 苏州美迈快速制造技术有限公司 | A kind of water-based dip applicating paint and preparation method thereof for 3D printing sand mold |
| CN111774519A (en) * | 2020-07-14 | 2020-10-16 | 老河口金琳汽配制造有限公司 | Special water-based paint for precoated sand |
| CN115069970A (en) * | 2022-06-17 | 2022-09-20 | 青州市珺凯工业装备有限公司 | Sand sticking preventing coating for large steel castings and preparation method thereof |
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| CN108246968B (en) | 2019-12-03 |
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