CN107052228A - A kind of high-efficiency and precision casts shell coating quick dry agent processed - Google Patents
A kind of high-efficiency and precision casts shell coating quick dry agent processed Download PDFInfo
- Publication number
- CN107052228A CN107052228A CN201710201841.2A CN201710201841A CN107052228A CN 107052228 A CN107052228 A CN 107052228A CN 201710201841 A CN201710201841 A CN 201710201841A CN 107052228 A CN107052228 A CN 107052228A
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- quick dry
- dry agent
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- precision
- shell
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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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- Mechanical Engineering (AREA)
- Paints Or Removers (AREA)
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Abstract
The present invention provides a kind of high-efficiency and precision and casts shell coating quick dry agent processed, it is that 0.05~2.00% flocculant and 98~99.95% solvent are constituted by percentage by weight, the flocculant is polyacrylamide, one kind or 2 kinds of combination in Sodium Polyacrylate, the solvent is distilled water or deionized water, a kind of high-efficiency and precision that the present invention is provided casts shell coating quick dry agent processed has rapid draing compared with traditional quick dry agent, improve formwork wet strength, prevent cracking, improve gas permeability, the advantages of shelling property, use convenience also extremely, effectively increase operating efficiency, shorten the production cycle, production cost is saved, with great economic use value.
Description
Technical field
The present invention relates to casting quick dry agent design field, and in particular to a kind of high-efficiency and precision casts shell coating processed and used
Quick dry agent.
Background technology
Quick dry agent will directly affect quality, the production cycle of shell and casting in Lost Wax Casting shell technical field of coatings
And cost, technical staff is to seek to be adapted to the quick dry agent of oneself, has carried out substantial amounts of research and experiment, most people is with alcohol radical silicon
Acetoacetic ester binding agent develops into water base silica sol binder, greatly reduces the pollution to environment, however, of the prior art fast
The need for dry agent can not even meet people's production, also in the presence of many deficiencies, such as quick dry agent of the prior art is because of drying
Speed is slow, stability is low, the high advantage and disadvantage of casting wasted product rate, has had a strong impact on production cycle extension, has added production cost, has had
Treat further improvement.
Containing 60% Free water in Ludox, the addition of quick dry agent necessarily greatly shortens its storage life, is that this is necessary
Carrying out " modification " processing makes its service life extend to more than half a year thus causes cost to increase severely, and quick dry agent is after coating
Scene " now with the current " be added in silica-sol wash, during normal production per 1-3 days just must supplement it is new with coating, a Zhou Houyi
Can all it update, in the absence of coating " aging " or quick dry agent degraded Problem of Failure.(NP quick dry agents long shelf-life was up to 2 years), practice
Confirm：If fast dry powder doses are water insoluble and it is mixed with refractory material and is applied directly to again in silica-sol wash, in the short time
Coating is just gelled " aging ", it can be seen that, the Adding Way of quick dry agent can directly influence Ludox (coating) service life and
Cost, it is necessary to pay special attention to, exactly rapidly-dried silica sol (agent) fails wide variety of one of the main reasons for many years for this.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of easy to use, anti-for above-mentioned the deficiencies in the prior art
Aging, a kind of high-efficiency and precision of rate of drying block cast shell coating quick dry agent processed.
The present invention is for the used technical scheme that solves the above problems：
The present invention provides a kind of high-efficiency and precision and casts shell coating quick dry agent processed, by by percentage by weight for 0.05~
2.00% flocculant and 98~99.95% solvent composition.
Further, the flocculant is one kind in polyacrylamide, Sodium Polyacrylate or 2 kinds of combination.
Further, the solvent is distilled water or deionized water.
Further, it is that 0.05% polyacrylamide and 99.95% deionized water are constituted by percentage by weight.
Further, by percentage by weight for 1% polyacrylamide, 1% Sodium Polyacrylate and 98% go from
Sub- water composition.
Further, it is that 2% polyacrylamide and 98% deionized water solution are constituted by percentage by weight.
The present invention provides a kind of high-efficiency and precision and casts shell coating quick dry agent processed, because its unique formula reaches Ludox
The rapid draing of shell (coating), improves wet strength, prevents cracking, improves the processing performance etc. of gas permeability, shelling property and coating
Purpose, but because the opportunity of addition is different, its effect is then far from each other, and the maximum shortcoming of organic polymer is the guarantor of its water-soluble liquid
It is very short (1-7 days) to deposit the phase, overdue to degrade, flocculation failure, " aging " is especially more easy under shear stress, its aqueous solution is dense
The more low then viscosity of degree is smaller, is easily uniformly dispersed
The action principle that a kind of high-efficiency and precision provided by the present invention casts shell coating quick dry agent processed is as follows：
The action principle of quick dry agent in the application：I.e. common Ludox (coating) add have high molecular polymer (with
Aqueous solution mode is added), the rapid draing of silicasol case (coating) is reached using its various characteristic having, improves wet strong
Degree, prevents cracking, improves the purposes such as the processing performance of gas permeability, shelling property and coating, but because the opportunity of addition is different, its effect
Then far from each other, the maximum shortcoming of organic polymer is that the storage life of its water-soluble liquid is very short (1-7 days), overdue to degrade,
Flocculation failure, is especially more easy to " aging ", the more low then viscosity of its concentration of aqueous solution is smaller, is easily uniformly dispersed under shear stress,
NP quick dry agents should typically be made into the relatively low aqueous solution of concentration, be then added in (Ludox) coating.
Containing 60% Free water in Ludox, the addition of quick dry agent necessarily greatly shortens its storage life, is that this is necessary
Carrying out " modification " processing makes its service life extend to more than half a year thus causes cost to increase severely, and quick dry agent is after coating
Scene " now with the current " be added in silica-sol wash, during normal production per 1-3 days just must supplement it is new with coating, a Zhou Houyi
Can all it update, in the absence of coating " aging " or quick dry agent degraded Problem of Failure.(NP quick dry agents long shelf-life was up to 2 years), practice
Confirm：If fast dry powder doses are water insoluble and it is mixed with refractory material and is applied directly to again in silica-sol wash, in the short time
Coating is just gelled " aging ", it can be seen that, the Adding Way of quick dry agent can directly influence Ludox (coating) service life and
Cost, it is necessary to pay special attention to, exactly rapidly-dried silica sol (agent) fails wide variety of one of the main reasons for many years for this.
A kind of high-efficiency and precision provided by the present invention, which casts shell coating quick dry agent processed, has following multifrequency nature：Flocculation
Property, cohesive, thickening property, resistive, dispersiveness drops, it, which also has, improves colloidal stability, improves shell gas permeability, gas permeability
Effect, specifically there is herein below：
Flocculability：The raw bulky grain of micelle flocculation of Ludox can be made, while (free moisture therein is accounted for into total moisture
60%) micelle surface is arrived by exclusion, is easy to volatilization, realization " rapid draing " when air-dried
Cohesive：The quick dry agent aqueous solution is a kind of with superior elasticity " soft " colloid in itself, and it (is one in Ludox
Plant " rigidity " colloid) dehydration gelling, it can reach that absorption, alleviation stress (having deformability) prevent shell from producing when producing shrinkage stress
The effect of crackle.Effect with physics " tying up ", can improve shell wet strength (30-40%).The critical of Ludox can also be reduced
Gel point (will be to 40% by 70%).Next layer can be carried out with regard to being gelled to be coated with, shorten the dry of interlayer in more water content
The dry time.
Thickening property：It is also improved being coated with property, spreadability to Ludox, increases the function of coating layer thickness.As quartz is (refined
Silica flour or fused quartz powder)-superficial layer silica-sol wash and cere surface wettability extreme difference, and in zircon flour coating
Fused quartz powder addition adds after NP its addition up to 50-70% at most no more than 5~10% (mass fractions),
Drop is resistive：It can make the mobility of fluid (coating) improve 50-80%.Be conducive to the stabilization of shell (casting) quality
And raising, it is therefore prevented that produce because of casting " wearing steel " defect for being produced piling (coating do not parch locally and in dewaxing or high
Ftractureed during temperature roasting at this)
Dispersiveness：It can improve refractory material dispersiveness in coating, fine powder (d<5-10 μm) content increases.Coating is coated with
Property, coating layer thickness increase, consistency improve, dispersiveness improve,
Stability：Quick dry agent can improve the stability (being brought up to for 3 days 7 days by original) of silica-sol wash.Itself it is " complexing
One kind in agent ", occurs " chelating " effect, also known as " chela with the metal ion (Na, Ca, Mg, Fe etc.) in water or in refractory powder
Mixture ", metal block agent or " water demineralization " agent.Adverse effect of the above-mentioned metal oxide to coating can be reduced, coating is improved
" stability ", extend service life.
Porous：Organic high molecular polymer (NP) will volatilize more than 300 DEG C.It has just fired after shell high-temperature roasting
Burning does not stay residue, ash totally.Gasification leaves volume micropore after decomposing, and can improve shell gas permeability 20%, shelling property 10%, drop
Low casting wasted product, improves post processing production efficiency.
The beneficial effects of the present invention are：
A kind of high-efficiency and precision that the present invention is provided casts shell coating quick dry agent processed to be had quickly compared with traditional quick dry agent
The advantages of drying, improve formwork wet strength, prevent from ftractureing, improve gas permeability, shelling property, while the disclosure as set forth herein quick dry agent
With splendid flocculability, cohesive, thickening property, the resistive, dispersiveness of drop.It, which also has, improves colloidal stability, improves shell
The effect of gas permeability, gas permeability, and convenience also extremely is used, effectively increase operating efficiency, shorten production week
Phase, production cost is saved, with great economic use value.
Embodiment
Embodiments of the present invention are illustrated with reference to specific embodiment, these embodiments are only given to illustrate
Purpose, can not be interpreted as that limitation of the invention is only for reference and explanation is used, not constitute to patent protection model of the present invention
The limitation enclosed, because without departing from the spirit and scope of the present invention, many change can be carried out to the present invention.
Embodiment 1
The present embodiment provides a kind of high-efficiency and precision and casts shell coating quick dry agent processed, is gathered by percentage by weight for 0.05%
Acrylamide and 99.95% deionized water composition.
The quick dry agent is added in Ludox during use, using effect is as follows：
(1) production cycle more than 1/2 is shortened；
(2) interlayer drying total time (six stratotype shells) by it is original >=shorten within 63 hours 17 hours, shell cycle processed is (to dewaxing
Before) shorten to 1-3 days by original 3-6 days；
(3) shell drying room area more than 1/3 is reduced；
(4) shell energy consumption for drying more than 50% has been saved；
(5) 35 yuan of the Ludox cost (rejecting after quick dry agent cost) of casting per ton is reduced
(6) processing performance of coating and the gas permeability (20%) of shell are improved, shelling property (10%) improves casting table
Face quality and post processing production efficiency.
(7) solve because surface Shell cracking is also easy to produce cast(ing) surface " joint flash ", the problem of " vein " defect, shell is wet strong
Degree improves 30-40%, in the field of business, has broken surface layer shell and has dried taboo (wind), the confinement of high humidity (degree), has realized rapid draing.
Embodiment 2
The present embodiment provides a kind of high-efficiency and precision and casts shell coating quick dry agent processed, by percentage by weight for 1% poly- third
Acrylamide, 1% Sodium Polyacrylate and 98% deionized water composition.
The quick dry agent is added in Ludox during use, using effect is as follows：
(1) production cycle more than 1/3 is shortened；
(2) interlayer drying total time (six stratotype shells) by it is original >=shorten within 63 hours 20 hours, shell cycle processed is (to dewaxing
Before) shorten to 1-5 days by original 3-6 days；
(3) shell drying room area more than 1/3 is reduced；
(4) shell energy consumption for drying more than 40% has been saved；
(5) 20 yuan of the Ludox cost (rejecting after quick dry agent cost) of casting per ton is reduced
(6) processing performance of coating and the gas permeability (20%) of shell are improved, shelling property (10%) improves casting table
Face quality and post processing production efficiency.
(7) solve because surface Shell cracking is also easy to produce cast(ing) surface " joint flash ", the problem of " vein " defect, shell is wet strong
Degree improves 30-40%, in the field of business, has broken surface layer shell and has dried taboo (wind), the confinement of high humidity (degree), has realized rapid draing.
Embodiment 3
The present embodiment provides a kind of high-efficiency and precision and casts shell coating quick dry agent processed, by percentage by weight for 2% poly- third
Acrylamide and 98% deionized water solution composition.
The quick dry agent is added in Ludox during use, using effect is as follows：
(1) production cycle more than 1/5 is shortened；
(2) interlayer drying total time (six stratotype shells) by it is original >=shorten within 63 hours 15 hours, shell cycle processed is (to dewaxing
Before) shorten to by original 3-6 days 7 days；
(3) shell drying room area more than 1/3 is reduced；
(4) shell energy consumption for drying more than 25% has been saved；
(5) 20 yuan of the Ludox cost (rejecting after quick dry agent cost) of casting per ton is reduced
(6) processing performance of coating and the gas permeability (15%) of shell are improved, shelling property (10%) improves casting table
Face quality and post processing production efficiency.
(7) solve because surface Shell cracking is also easy to produce cast(ing) surface " joint flash ", the problem of " vein " defect, shell is wet strong
Degree improves 30-40%, in the field of business, has broken surface layer shell and has dried taboo (wind), the confinement of high humidity (degree), has realized rapid draing.
Found by above-described embodiment, embodiment 1 has preferable drying property, a kind of high-efficiency and precision that the present invention is provided
Casting shell coating quick dry agent processed has rapid draing compared with traditional quick dry agent, improves formwork wet strength, prevent from ftractureing, improve
The advantages of gas permeability, shelling property, while quick dry agent disclosed in the present application has splendid flocculability, cohesive, thickening property, drop
Resistive, dispersiveness.It, which also has, improves colloidal stability, improves shell gas permeability, the effect of gas permeability.And use
Convenience extremely, effectively increases operating efficiency, shortens the production cycle, saved production cost, make with great economy
With value.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (6)
1. a kind of high-efficiency and precision casts shell coating quick dry agent processed, it is characterised in that：It is 0.05~2.00% by percentage by weight
Flocculant and 98~99.95% solvent composition.
2. a kind of high-efficiency and precision according to claim 1 casts shell coating quick dry agent processed, it is characterised in that：The flocculation
Agent is one kind in polyacrylamide, Sodium Polyacrylate or 2 kinds of combination.
3. a kind of high-efficiency and precision according to claim 1 casts shell coating quick dry agent processed, it is characterised in that：The solvent
For distilled water or deionized water.
4. a kind of high-efficiency and precision according to claim 1 or 2 or 3 casts shell coating quick dry agent processed, it is characterised in that：By
Percentage by weight is that 0.05% polyacrylamide and 99.95% deionized water are constituted.
5. a kind of high-efficiency and precision according to claim 1 or 2 or 3 casts shell coating quick dry agent processed, it is characterised in that：By
Percentage by weight is 1% polyacrylamide, 1% Sodium Polyacrylate and 98% deionized water are constituted.
6. a kind of high-efficiency and precision according to claim 1 or 2 or 3 casts shell coating quick dry agent processed, it is characterised in that：By
Percentage by weight is that 2% polyacrylamide and 98% deionized water solution are constituted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201841.2A CN107052228A (en) | 2017-03-30 | 2017-03-30 | A kind of high-efficiency and precision casts shell coating quick dry agent processed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201841.2A CN107052228A (en) | 2017-03-30 | 2017-03-30 | A kind of high-efficiency and precision casts shell coating quick dry agent processed |
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| Publication Number | Publication Date |
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| CN107052228A true CN107052228A (en) | 2017-08-18 |
Family
ID=59602847
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710201841.2A Pending CN107052228A (en) | 2017-03-30 | 2017-03-30 | A kind of high-efficiency and precision casts shell coating quick dry agent processed |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108296427A (en) * | 2018-01-17 | 2018-07-20 | 江门市新灵科技有限公司 | A kind of face layer anti-cracking agent and preparation method thereof |
| CN110947903A (en) * | 2019-12-26 | 2020-04-03 | 湖南洛兰新材料有限公司 | Modified composition of adhesive for titanium alloy investment casting and application thereof |
| CN113814351A (en) * | 2021-10-25 | 2021-12-21 | 湖州南丰机械制造有限公司 | Rapid shell manufacturing method of shell for precision casting |
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| CN113814351A (en) * | 2021-10-25 | 2021-12-21 | 湖州南丰机械制造有限公司 | Rapid shell manufacturing method of shell for precision casting |
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