CN105983647A - Calcium sulfate whisker-reinforced, low-carbon-residue and easy-to-peel water-based coating for lost foam casting and preparation method of coating - Google Patents
Calcium sulfate whisker-reinforced, low-carbon-residue and easy-to-peel water-based coating for lost foam casting and preparation method of coating Download PDFInfo
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- CN105983647A CN105983647A CN201610016220.2A CN201610016220A CN105983647A CN 105983647 A CN105983647 A CN 105983647A CN 201610016220 A CN201610016220 A CN 201610016220A CN 105983647 A CN105983647 A CN 105983647A
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- coating
- lost foam
- calcium sulfate
- foam casting
- water
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
Abstract
The invention relates to the technical field of lost foam casting, in particular to a calcium sulfate whisker-reinforced, low-carbon-residue and easy-to-peel water-based coating for lost foam casting and a preparation method of the coating. According to the coating, mixed wollastonite powder and quartz sand which have different particle sizes are taken as refractory aggregate and have the good gas permeability and heat insulation performance, a mixed suspending agent prepared from materials such as sodium bentonite, sodium carboxymethylcellulose and the like has the good suspending effect and can effectively improve the smearing property and the film forming property of the coating, added calcium sulfate whiskers have thickening, reinforcing and toughening effects and the like, added nano cerium dioxide has the oxygen storage capacity, oxygen can be released in the casting process, the oxidation combustion efficiency of plastic is improved, and carbon residues are reduced; the prepared coating has the excellent coating mechanical property and is good in adhesion, not prone to collapse and breakage as well as easy to peel and clean, prepared castings have less surface impurities, and the quality is higher.
Description
Technical field
The present invention relates to Technology of EPC field, the low carbon residue being specifically related to the enhancing of a kind of sulfur acid calcium pyroborate is easily peeled Water-based coating for lost foam casting and preparation method thereof.
Background technology
Refractory Coating for Lost Foam Casting refers to be coated in one layer of special coating of apperance outer surface during lost foam casting, it plays critical effect in casting process, owing to apperance is made up of foam plastics, the character such as the breathability of coating, strength of coating, rheological characteristic all will produce vital impact to cast article, the lost foam paint of function admirable it suffices that: (1) can assist intensity and the rigidity improving foam plastics mould, prevents apperance from destroying and deformation；(2) there is buffer action, molten metal is separated with model, prevent molten metal from penetrating in dry sand, prevent cast(ing) surface from forming defect；(3) permeation functions, gets rid of apperance in time and decomposes the gas or liquid produced, prevent foundry goods from pore, carbon black defect etc. occur；(4) there are good sintering fissility, anti-sand viscosity, anti-metal liquid aggressivity etc.；(5) there are the characteristics such as good wettability, being coated with property, the feature of environmental protection, heat stability, protection against the tide.
Lost foam paint composition mainly includes the compositions such as refractory aggregate, bonding agent, solvent, suspending agent and various additives, several classes such as being broadly divided into water based paint, alcohol-base paint, cold coating are divided by its adhesive properties used, wherein water based paint because cost relatively low apply in actual production relatively broad, but water based paint exists during coating cleaning the most defeated and dispersed, easily scab, and the serviceability of major part product still suffers from defect, do not reach foregoing effect.
Summary of the invention
It is an object of the invention to, the low carbon residue preparing the enhancing of a kind of sulfur acid calcium pyroborate is easily peeled Water-based coating for lost foam casting, to obtain the apperance coating with high intensity, highly-breathable, low carbon residue, thus improve casting quality, to achieve these goals, the technical solution used in the present invention is as follows:
The low carbon residue that a kind of sulfur acid calcium pyroborate strengthens is easily peeled Water-based coating for lost foam casting, it is characterized in that, this coating is made up of the raw material of following weight portion: 200-325 mesh wollastonite in powder 20-25, solid content is the Ludox 3-5 of 20-25%, 180-200 mesh quartz sand 35-45, calcium sulfate crystal whiskers 6-8, white glue with vinyl 1-2, sodium bentonite 1-2, water-borne acrylic resin 1-1.5, sodium lignin sulfonate 0.01-0.02, peregal 0.01-0.02, nano ceric oxide 0.01-0.02, sodium carboxymethyl cellulose 0.1-0.2, preservative 0.001-0.002, defoamer 0.01-0.02, soft water 30-40.
The low carbon residue that described a kind of sulfur acid calcium pyroborate strengthens is easily peeled the preparation method of Water-based coating for lost foam casting, it is characterised in that described preparation method is:
(1) first sodium lignin sulfonate, peregal, sodium carboxymethyl cellulose are put in soft water, stir to after being completely dissolved, put into calcium sulfate crystal whiskers, nano ceric oxide, ultrasonic high-speed stirred makes it the most dispersed, add sodium bentonite subsequently, continue stirring mixing 40-50min, finally by standby for gained mixed slurry；
(2) put in agitator together with the slurry that wollastonite in powder, quartz sand are prepared with the step (1) of 18-20 weight portion, after high-speed stirred dispersion 30-40min, add other leftover materials all, and add soft water according to required slurry density, it is further continued for dispersed with stirring 40-50min, to obtain final product.
Wollastonite in powder, quartz sand that coating of the present invention there are differences using particle diameter mix as refractory aggregate, there is good breathability and thermal insulation, good with mix suspending agent suspension effect prepared by the material such as sodium bentonite, sodium carboxymethyl cellulose, being coated with property and the film property of coating can be effectively improved, the calcium sulfate crystal whiskers added has thickening, reinforcement, the effect such as toughness reinforcing, the nano ceric oxide added has oxygen storage capacity, energy releasing oxygen in casting process, improve the oxidizing fire efficiency of plastics, reduce carbon residue；Paint coatings mechanical property prepared by this invention is good, and cohesiveness is good, and being difficult to subside ruptures, it is easy to peel off cleaning, and the cast(ing) surface impurity of preparation is less, and quality is more preferably.
Detailed description of the invention
Embodiment
The coating of the present embodiment is made up of the raw material of following weight portion: 250 mesh wollastonites in powder 22, solid content be 25% Ludox 4,180 mesh quartz sand 40, calcium sulfate crystal whiskers 6, white glue with vinyl 1.5, sodium bentonite 1.5, water-borne acrylic resin 1.2, sodium lignin sulfonate 0.01, peregal 0.01, nano ceric oxide 0.01, sodium carboxymethyl cellulose 0.1, preservative 0.001, defoamer 0.01, soft water 35.
The preparation method of this coating is:
(1) first sodium lignin sulfonate, peregal, sodium carboxymethyl cellulose are put in soft water, stir to after being completely dissolved, put into calcium sulfate crystal whiskers, nano ceric oxide, ultrasonic high-speed stirred makes it the most dispersed, add sodium bentonite subsequently, continue stirring mixing 45min, finally by standby for gained mixed slurry；
(2) put in agitator together with the slurry that wollastonite in powder, quartz sand are prepared with the step (1) of 20 weight portions, after high-speed stirred dispersion 35min, add other leftover materials all, and add appropriate soft water, continuing dispersed with stirring 45min, adjusting coating density is 60 Baume degrees, to obtain final product.
Coating property test result obtained by the present embodiment is:
| Detection project | Testing result |
| Strength of coating (0.8mm thick coating) | 4.32×105Pa |
| Breathability (0.8mm thick coating × 1200 DEG C) | 4.08cm4·(g·min)- 1 |
| Suspension (24h) | 98% |
| Once it is coated with thickness δ | 0.3mm |
Claims (2)
1. the low carbon residue of a sulfur acid calcium pyroborate enhancing is easily peeled Water-based coating for lost foam casting, it is characterized in that, this coating is made up of the raw material of following weight portion: 200-325 mesh wollastonite in powder 20-25, solid content is the Ludox 3-5 of 20-25%, 180-200 mesh quartz sand 35-45, calcium sulfate crystal whiskers 6-8, white glue with vinyl 1-2, sodium bentonite 1-2, water-borne acrylic resin 1-1.5, sodium lignin sulfonate 0.01-0.02, peregal 0.01-0.02, nano ceric oxide 0.01-0.02, sodium carboxymethyl cellulose 0.1-0.2, preservative 0.001-0.002, defoamer 0.01-0.02, soft water 30-40.
The low carbon residue that a kind of sulfur acid calcium pyroborate the most as claimed in claim 1 strengthens is easily peeled the preparation method of Water-based coating for lost foam casting, it is characterised in that described preparation method is:
(1) first sodium lignin sulfonate, peregal, sodium carboxymethyl cellulose are put in soft water, stir to after being completely dissolved, put into calcium sulfate crystal whiskers, nano ceric oxide, ultrasonic high-speed stirred makes it the most dispersed, add sodium bentonite subsequently, continue stirring mixing 40-50min, finally by standby for gained mixed slurry；
(2) put in agitator together with the slurry that wollastonite in powder, quartz sand are prepared with the step (1) of 18-20 weight portion, after high-speed stirred dispersion 30-40min, add other leftover materials all, and add soft water according to required slurry density, it is further continued for dispersed with stirring 40-50min, to obtain final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610016220.2A CN105983647A (en) | 2016-01-11 | 2016-01-11 | Calcium sulfate whisker-reinforced, low-carbon-residue and easy-to-peel water-based coating for lost foam casting and preparation method of coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610016220.2A CN105983647A (en) | 2016-01-11 | 2016-01-11 | Calcium sulfate whisker-reinforced, low-carbon-residue and easy-to-peel water-based coating for lost foam casting and preparation method of coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105983647A true CN105983647A (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610016220.2A Pending CN105983647A (en) | 2016-01-11 | 2016-01-11 | Calcium sulfate whisker-reinforced, low-carbon-residue and easy-to-peel water-based coating for lost foam casting and preparation method of coating |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101735674A (en) * | 2010-01-07 | 2010-06-16 | 中国人民解放军海军后勤技术装备研究所 | Aqueous inorganic zinc-enriched coating and preparation method thereof |
| CN105057571A (en) * | 2015-07-27 | 2015-11-18 | 明光市留香泵业有限公司 | High-thermostability water-based paint containing nanometer wollastonite for lost foam casting and manufacturing method of water-based paint |
| CN105057568A (en) * | 2015-07-27 | 2015-11-18 | 明光市留香泵业有限公司 | Nanometer-titania-strengthening easily-strippable water-based paint for lost foam casting and preparing method of water-based paint |
-
2016
- 2016-01-11 CN CN201610016220.2A patent/CN105983647A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101735674A (en) * | 2010-01-07 | 2010-06-16 | 中国人民解放军海军后勤技术装备研究所 | Aqueous inorganic zinc-enriched coating and preparation method thereof |
| CN105057571A (en) * | 2015-07-27 | 2015-11-18 | 明光市留香泵业有限公司 | High-thermostability water-based paint containing nanometer wollastonite for lost foam casting and manufacturing method of water-based paint |
| CN105057568A (en) * | 2015-07-27 | 2015-11-18 | 明光市留香泵业有限公司 | Nanometer-titania-strengthening easily-strippable water-based paint for lost foam casting and preparing method of water-based paint |
Non-Patent Citations (2)
| Title |
|---|
| 中国科学技术协会: "《2012-2013化学学科发展报告》", 28 February 2014, 中国科学技术出版社 * |
| 罗振: "《第四次工业革命 纳米技术》", 31 July 2014, 吉林人民出版社 * |
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Application publication date: 20161005 |
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