CN102836949A - Heat insulation spraying coating for centrifugally casting cylinder sleeve and manufacturing method of heat insulation spray coating - Google Patents
Heat insulation spraying coating for centrifugally casting cylinder sleeve and manufacturing method of heat insulation spray coating Download PDFInfo
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- CN102836949A CN102836949A CN2012103001331A CN201210300133A CN102836949A CN 102836949 A CN102836949 A CN 102836949A CN 2012103001331 A CN2012103001331 A CN 2012103001331A CN 201210300133 A CN201210300133 A CN 201210300133A CN 102836949 A CN102836949 A CN 102836949A
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Abstract
The invention discloses a heat insulation spraying coating for centrifugally casting a cylinder sleeve and a manufacturing method of the heat insulation spraying coating, wherein the coating contains the main constituents including diatomite, quartz sand, bentonite, graphite powder, polyethylene glycol and washing powder. The manufacturing method of the heat insulation spraying coating comprises the following steps of: starting a blender, and adding carrier solvent water; adding polyethylene glycol and bentonite, and stirring; then adding diatomite, quartz sand and graphite powder in sequence and continuously stirring; and adding a liquor prepared by dissolving washing powder in adequate water into the coating and continuously stirring. The heat insulation spraying coating disclosed by the invention has good heat insulating ability and is suitable for the production of various high-performance centrifugal casting products, and meanwhile, the coating is good in leveling property and excellent in suspension property. The coating has no delamination, deposition and component separation phenomena within seven nights without requiring any special treatment after being manufactured.
Description
Technical field
The invention belongs to chemical field, be specifically related to a kind of thermal insulation coatings and the method for making this coating.
Background technology
At present, the used water base insulating mold coating material-uploading style of cylinder sleeve centrifugal casting mainly contains two kinds: one is to use instruments such as coatings tank to be poured over molding surface, and another kind promptly adopts the automatic spraying machine structure that paint is overlayed on molding surface.Spraying process is owing to have incomparable advantage applying uniformity, THICKNESS CONTROL and alleviate the more traditional tipping in aspect such as labor strength, obtained application more and more widely at centrifugal casting production field in recent years.
And heat insulating sprayed coating is because its special use technological requirement, to the heat insulating ability of coating, and levelability, suspension, gas permeabilities etc. require more traditional coating higher, and need guarantee that the phenomenon that component is separated does not take place for a long time in the coating back that completes.Component takes place during heat insulating sprayed coating ubiquity in the market uses easily separate, the phenomenon of deposition need in use adopt other householder methods, stirs as blowing, and mechanical agitation etc. make coating keep the uniformity of component.
Summary of the invention
Given this, the object of the invention is to provide the long-time unseparated cylinder sleeve centrifugal casting of a kind of component heat insulating sprayed coating.
For solving above technical problem, technical scheme provided by the invention is, provides a kind of cylinder sleeve centrifugal casting heat insulating sprayed coating, and this coating main component comprises diatomite, quartz sand, bentonite, graphite powder, polyethylene glycol and washing powder.
Diatomite: weight accounts for 45%～55% of each component gross weight of coating siccative.
Quartz sand: weight accounts for 25%～35% of each component gross weight of coating siccative; Use diatomite separately or use quartz sand to have insulation effect separately; But under certain thickness requirement, like the paint thickness of 0.5～1.0mm, the gas permeability of this coating is relatively poor; To such an extent as to the product sand holes defective of producing is more, sometimes even can reach 20%～30%.And diatomite and the quartz sand of selecting this component and specification as the coating aggregate after, make coating have excellent insulating property and gas permeability, product sand holes defective has obtained effective control, when low, can reach below 0.3%.
Bentonite: weight accounts for 10%～15% of each component gross weight of coating siccative; The bentonite of selecting this component and specification has the effect of each component bonding agent of coating concurrently simultaneously as main suspending agent, makes coating be difficult for layering.
Graphite powder: weight accounts for 3%～8% of each component gross weight of coating siccative; The graphite powder of selecting this component and specification makes coating when having heat insulating ability concurrently, effectively improve the high temperature demolding performace of mould as active lubricant.And also regulated aggregate proportion to a certain extent, thereby improved the suspendability of coating through the flake graphite that bonding agent is attached on the heat preserving aggregate.
Polyethylene glycol: weight accounts for 0.2%～0.6% of each component gross weight of coating; Select polyethylene glycol as bonding agent, make the bonding effect of each component of coating stronger, and when low temperature, strengthened the mould tack, increased coating suspension property and levelability simultaneously.When not using polyethylene glycol as bonding agent, coating is not strong for the tack of mould, causes the coating became uneven even, thereby causes outer sand defective; After using this component; The coating tack strengthens; Levelability strengthens, and does not occur that coating is inhomogeneous, coating is not hung phenomenons such as mould, the mould that uses other coating even wearing and tearing under the situation that relatively light can not continue to use; Use this coating still can be coated with uniformly and hang over die surface, this has just effectively prolonged the service life of mould.When not using polyethylene glycol as bonding agent, the easy layering of coating, each component can not form uniform amalgam, causes the coating heat-insulating property unbalanced, thereby causes local spoken parts in traditional operas or the fiber crops mouthful defective of producing of product; After using this component, coating still produces deposition or lamination after round the clock leaving standstill 7, has kept the long harmony of each component of coating, thereby has also just guaranteed coating quality and product quality.When not using polyethylene glycol as bonding agent, coating easy blocking spray body; After using this component, coating leave standstill 7 still produce to stop up spray body after round the clock phenomenon.
Washing powder: weight accounts for 0.2%～0.4% of each component gross weight of coating.
Further, the order number of said diatomite and quartz sand is greater than 200 orders; The order number of said bentonite and graphite powder is greater than 300 orders.Under the situation of low mesh number,, all be easy to generate deposition, and have a strong impact on coating quality no matter be diatomite or quartz sand.As everyone knows, international powder granule sieve mesh particle diameter can convert, and reduction formula is the reduction formula of order number and particle diameter micron: order number * aperture (micron number)=15000.That is to say that the order number is greater than 200 orders, particle diameter is then less than 75 microns.
Preferably, said graphite powder is a flake graphite.
Preferably, the component of said coating is:
Diatomite: weight accounts for 51.3% of each component gross weight of coating siccative;
Quartz sand: weight accounts for 30% of each component gross weight of coating siccative;
Bentonite: weight accounts for 12.5% of each component gross weight of coating siccative;
Graphite powder: weight accounts for 5.5% of each component gross weight of coating siccative;
Polyethylene glycol: weight accounts for 0.4% of each component gross weight of coating;
Washing powder: weight accounts for 0.3% of each component gross weight of coating.The washing powder that the present invention uses is matured product, on market, can buy easily, and its main component is an anion surfactant: sodium alkyl benzene sulfonate.
Coating siccative according to the invention is meant diatomite, quartz sand, bentonite and graphite powder.
The present invention also provides the preparation method of the heat insulating sprayed coating of above-mentioned cylinder sleeve centrifugal casting.
Technical scheme provided by the invention is, the preparation method of the heat insulating sprayed coating of above-mentioned cylinder sleeve centrifugal casting is provided, and its preparation method step is following:
1) starts mixer, add carrier solvent water;
2) add polyethylene glycol and bentonite, stirred 2～3 hours;
3) successively add diatomite, quartz sand and graphite powder, stirred 3～4 hours;
4) add in the coating after washing powder is processed solution with suitable quantity of water dissolving, stirred 0.3～0.5 hour;
5) close down mixer, coating completes.
Further, the proportion control of said carrier solvent water is 0.6 ~ 0.8 of the total component of sprayed coating, and the proportion of the sprayed coating for preparing is 0.8～1.4.
Preferably, the rotating speed of said mixer is 600～900 rev/mins.
Preferably, said preparation method step is following:
1) starts mixer, add carrier solvent water;
2) add polyethylene glycol and bentonite, stirred 2.5 hours;
3) successively add diatomite, quartz sand and graphite powder, stirred 3.5 hours;
4) add in the coating after washing powder is processed solution with suitable quantity of water dissolving, stirred 0.4 hour;
5) close down mixer, coating completes.
Useful is, the heat insulating sprayed coating that adopts this explained hereafter to go out has excellent insulating property, is applicable to the production of various high-performance centrifugal casting products, and the levelability of coating is good simultaneously, and suspension is splendid.After completing, need not take coating any specially treated can keep 7 layering does not take place round the clock, deposition, component segregation phenomenon.Use round the clock in the coating back 7 that completes, need not take any supplementary mode to keep the uniformity of coating.This coating is not only applicable to automatic sprayed coating, and the adjusting through proportion, is applicable to the traditional hand material-uploading style yet.
On centrifugal casting cylinder sleeve coating, use 0.2%～0.6% polyethylene glycol that accounts for each component gross weight of coating as the coating bonding agent, make the bonding effect of each component of coating stronger, and when low temperature, strengthened the mould tack; Prolonged die life indirectly, increased coating suspension property and levelability simultaneously, made coating can keep the combination of each component of coating for a long time; Not stratified; Do not separate, deposited phenomenon does not take place, prolonged the use effective time of coating.
Through selecting diatomite, quartz sand, bentonite, polyethylene glycol, flake graphite in powder, washing powder and the suitable quantity of water of aforementioned each component and specification; Under specific making stirring technique; The novel heat insulation coating that is used to be suitable for cylinder sleeve centrifugal casting spraying production is processed in aforementioned each coating composition combination, made coating have excellent insulating property, suspension, levelability, gas permeability, mould tack and release property concurrently.
The specific embodiment
Embodiment 1
The raw material of the heat insulating sprayed coating of present embodiment cylinder sleeve centrifugal casting is:
Diatomite 450g, several 210 orders of order; Quartz sand 350g, several 210 orders of order; Bentonite: 150g, several 320 orders of order; Graphite powder 50g, several 320 orders of order; Polyethylene glycol 2.1g; Washing powder 4g.The employed washing powder of present embodiment is common non-phosphide detergent, and main component is an anion surfactant: sodium alkyl benzene sulfonate.
Use above-mentioned raw materials to prepare coating, at first start mixer, the mixer speed setting is 900 rev/mins, in mixer, adds carrier solvent water, and carrier solvent water accounts for 0.7 of the total component ratio of sprayed coating; Add polyethylene glycol and bentonite, stirs after 2 hours, successively add diatomite, quartz sand and graphite powder again, stirs after 3 hours, washing powder is dissolved with suitable quantity of water process behind the solution in the adding coating, stir after 0.3 hour, close down mixer, coating completes.
The coating that present embodiment prepares can keep the combination of each component of coating in 168 hours, not stratified, did not separate, and deposited phenomenon does not take place.
Embodiment 2
The raw material of the heat insulating sprayed coating of present embodiment cylinder sleeve centrifugal casting is:
Diatomite 550g, several 300 orders of order; Quartz sand 250g, several 300 orders of order; Bentonite 120g, several 350 orders of order; Graphite powder 80g, several 350 orders of order; Polyethylene glycol: 6g; Washing powder: 2.1g.The employed washing powder of present embodiment is common non-phosphide detergent, and main component is an anion surfactant: sodium alkyl benzene sulfonate.
Use above-mentioned raw materials to prepare coating, at first start mixer, the mixer speed setting is 600 rev/mins, in mixer, adds carrier solvent water, and the ratio that carrier solvent water accounts for the total component of sprayed coating is 0.6; Add polyethylene glycol and bentonite, stirs after 3 hours, successively add diatomite, quartz sand and graphite powder, stirs after 4 hours, washing powder is dissolved with suitable quantity of water process behind the solution in the adding coating, stirred 0.5 hour; Close down mixer, coating completes.
The coating that present embodiment prepares can keep the combination of each component of coating in 170 hours, not stratified, did not separate, and deposited phenomenon does not take place.
Embodiment 3
The raw material of the heat insulating sprayed coating of present embodiment cylinder sleeve centrifugal casting is:
Diatomite 510g, several 250 orders of order; Quartz sand 310g, several 250 orders of order; Bentonite 125g, several 380 orders of order; Graphite powder 55g, several 380 orders of order; Polyethylene glycol 4g; Washing powder 3g.The employed washing powder of present embodiment is common non-phosphide detergent, and main component is an anion surfactant: sodium alkyl benzene sulfonate.
Use above-mentioned raw materials to prepare coating, at first start mixer, the mixer speed setting is 750 rev/mins, in mixer, adds carrier solvent water, and the ratio that carrier solvent water accounts for the total component of sprayed coating is 0.8; Add polyethylene glycol and bentonite, stir after 2.5 hours, successively add diatomite, quartz sand and graphite powder; Stir after 3.5 hours, add in the coating after washing powder is processed solution with suitable quantity of water dissolving, stir after 0.4 hour; Close down mixer, coating completes.
The coating that present embodiment prepares can keep the combination of each component of coating in 168 hours, not stratified, did not separate, and deposited phenomenon does not take place.
Only be preferred implementation of the present invention below, should be pointed out that above-mentioned preferred implementation should not be regarded as limitation of the present invention, protection scope of the present invention should be as the criterion with claim institute restricted portion.For those skilled in the art, do not breaking away from the spirit and scope of the present invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (8)
1. heat insulating sprayed coating of cylinder sleeve centrifugal casting is characterized in that the component of this coating is:
Diatomite: weight accounts for 45%～55% of each component gross weight of coating siccative;
Quartz sand: weight accounts for 25%～35% of each component gross weight of coating siccative;
Bentonite: weight accounts for 10%～15% of each component gross weight of coating siccative;
Graphite powder: weight accounts for 3%～8% of each component gross weight of coating siccative;
Polyethylene glycol: weight accounts for 0.2%～0.6% of each component gross weight of coating;
Washing powder: weight accounts for 0.2%～0.4% of each component gross weight of coating.
2. the heat insulating sprayed coating of cylinder sleeve centrifugal casting according to claim 1 is characterized in that the order number of said diatomite and quartz sand is greater than 200 orders; The order number of said bentonite and graphite powder is greater than 300 orders.
3. the heat insulating sprayed coating of cylinder sleeve centrifugal casting according to claim 1 is characterized in that said graphite powder is a flake graphite.
4. the heat insulating sprayed coating of cylinder sleeve centrifugal casting according to claim 3 is characterized in that the component of said coating is:
Diatomite: weight accounts for 51% of each component gross weight of coating siccative;
Quartz sand: weight accounts for 31% of each component gross weight of coating siccative;
Bentonite: weight accounts for 12.5% of each component gross weight of coating siccative;
Graphite powder: weight accounts for 5.5% of each component gross weight of coating siccative;
Polyethylene glycol: weight accounts for 0.4% of each component gross weight of coating;
Washing powder: weight accounts for 0.3% of each component gross weight of coating.
5. the preparation method of the heat insulating sprayed coating of the described cylinder sleeve centrifugal casting of arbitrary claim more than is characterized in that its preparation method step is following:
Start mixer, add carrier solvent water;
Add polyethylene glycol and bentonite, stirred 2～3 hours;
Successively add diatomite, quartz sand and graphite powder, stirred 3～4 hours;
Add in the coating after washing powder processed solution with suitable quantity of water dissolving, stirred 0.3～0.5 hour;
Close down mixer, coating completes.
6. the preparation method of the heat insulating sprayed coating of cylinder sleeve centrifugal casting according to claim 5 is characterized in that the proportion control of said carrier solvent water is 0.6 ~ 0.8 of the total component of sprayed coating.
7. the preparation method of the heat insulating sprayed coating of cylinder sleeve centrifugal casting according to claim 5 is characterized in that the rotating speed of said mixer is 600～900 rev/mins.
8. the preparation method of the heat insulating sprayed coating of cylinder sleeve centrifugal casting according to claim 7 is characterized in that, said preparation method step is following:
Start mixer, add carrier solvent water;
Add polyethylene glycol and bentonite, stirred 2.5 hours;
Successively add diatomite, quartz sand and graphite powder, stirred 3.5 hours;
Add in the coating after washing powder processed solution with suitable quantity of water dissolving, stirred 0.4 hour;
Close down mixer, coating completes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210300133.1A CN102836949B (en) | 2012-08-22 | 2012-08-22 | Manufacturing method of heat insulation spray coating for centrifugally casting cylinder sleeve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210300133.1A CN102836949B (en) | 2012-08-22 | 2012-08-22 | Manufacturing method of heat insulation spray coating for centrifugally casting cylinder sleeve |
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| CN102836949A true CN102836949A (en) | 2012-12-26 |
| CN102836949B CN102836949B (en) | 2014-12-31 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344929A (en) * | 2015-11-13 | 2016-02-24 | 中原内配集团安徽有限责任公司 | Engine cylinder sleeve coating |
| CN108480549A (en) * | 2018-05-18 | 2018-09-04 | 宜兴市东山新型材料有限公司 | A kind of casting alcohol based dry powder paint and preparation method thereof |
| CN109797036A (en) * | 2019-02-27 | 2019-05-24 | 新乡市海山机械有限公司 | A kind of release agent and preparation method thereof of bronze casting punching block demoulding |
| CN110026529A (en) * | 2019-04-26 | 2019-07-19 | 江苏爱吉斯海珠机械有限公司 | A kind of coating and its preparation method and application of cylinder jacket centrifugal casting |
| CN111531120A (en) * | 2020-04-27 | 2020-08-14 | 埃肯铸造(中国)有限公司 | Preparation method of novel casting coating |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344929A (en) * | 2015-11-13 | 2016-02-24 | 中原内配集团安徽有限责任公司 | Engine cylinder sleeve coating |
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| CN109797036B (en) * | 2019-02-27 | 2021-11-12 | 新乡市海山机械有限公司 | Release agent for demolding bronze casting steel die and preparation method thereof |
| CN110026529A (en) * | 2019-04-26 | 2019-07-19 | 江苏爱吉斯海珠机械有限公司 | A kind of coating and its preparation method and application of cylinder jacket centrifugal casting |
| CN110026529B (en) * | 2019-04-26 | 2021-03-09 | 江苏爱吉斯海珠机械有限公司 | Coating for centrifugal casting of cylinder sleeve and preparation method and application thereof |
| CN111531120A (en) * | 2020-04-27 | 2020-08-14 | 埃肯铸造(中国)有限公司 | Preparation method of novel casting coating |
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| CN102836949B (en) | 2014-12-31 |
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