CN102836949B - Manufacturing method of heat insulation spray coating for centrifugally casting cylinder sleeve - Google Patents
Manufacturing method of heat insulation spray coating for centrifugally casting cylinder sleeve Download PDFInfo
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- CN102836949B CN102836949B CN201210300133.1A CN201210300133A CN102836949B CN 102836949 B CN102836949 B CN 102836949B CN 201210300133 A CN201210300133 A CN 201210300133A CN 102836949 B CN102836949 B CN 102836949B
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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 method of thermal insulation coatings and this coating of making.
Background technology
At present, it is use the instruments such as coatings tank to be poured over molding surface that cylinder sleeve centrifugal casting water base insulating mold coating material-uploading style used mainly contains two kinds: one, and namely another kind adopts automatic spray coating mechanism to spray coating at molding surface.Spraying process due to coating uniformity, THICKNESS CONTROL and in alleviating labor strength etc. more traditional tipping there is incomparable advantage, obtain at centrifugal casting production field in recent years and apply more and more widely.
And heat insulating sprayed coating is due to its special operation requirement, to the heat insulating ability of coating, levelability, suspension, gas permeability etc. require that more traditional coating is higher, and need the phenomenon that ensures Component seperation does not occur after coating completes for a long time.Easily there is Component seperation, the phenomenon of precipitation during heat insulating sprayed coating ubiquity in the market uses, need in use to adopt other householder methods, stirring as blown, 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, provide a kind of cylinder sleeve centrifugal casting heat insulating sprayed coating, 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 weight of coating siccative.
Quartz sand: weight accounts for 25% ~ 35% of each component weight of coating siccative; Be used alone diatomite or be used alone quartz sand and there is insulation effect, but under certain thickness requirement, as the paint thickness of 0.5 ~ 1.0mm, the gas permeability of this coating is poor, to such an extent as to the product sand holes defect of producing is more, sometimes even can reach 20% ~ 30%.And select the diatomite of this component and specification and quartz sand as after coating aggregate, make coating have excellent heat insulating ability and gas permeability, product sand holes defect obtains effective control, can reach less than 0.3% when lower.
Bentonite: weight accounts for 10% ~ 15% of each component weight of coating siccative; Select the bentonite of this component and specification as main suspending agent, have the effect of each component bonding agent of coating simultaneously concurrently, make coating not easily layering.
Graphite powder: weight accounts for 3% ~ 8% of each component weight of coating siccative; Select the graphite powder of this component and specification as active lubricant, make coating while having heat insulating ability concurrently, effectively improve the High temperature release performance of mould.And also have adjusted aggregate proportion to a certain extent by the flake graphite that bonding agent is attached on heat preserving aggregate, thus improve the suspendability of coating.
Polyethylene glycol: weight accounts for 0.2% ~ 0.6% of each component weight of coating; Select polyethylene glycol as bonding agent, make the bonding effect of each component of coating stronger, and enhance mould tack when low temperature, add coating suspension and levelability simultaneously.When not using polyethylene glycol as bonding agent, coating is not strong for the tack of mould, causes coating became uneven even, thus causes outer sand defect; After using this component, Paint Adhesion strengthens, levelability strengthens, do not occur that coating is uneven, coating does not hang the phenomenons such as mould, use even the mould of other coating when wear and tear brighter can not continue use, use this coating still can be coated with uniformly and hang over die surface, this just effectively extends the mold use life-span.When not using polyethylene glycol as bonding agent, the easy layering of coating, each component can not form uniform mixture, causes thermal-insulation coating performance unbalanced, thus causes product local generation spoken parts in traditional operas or numb mouth defect; After using this component, coating leave standstill 7 round the clock after still do not produce precipitation or lamination, maintain the long harmony of each component of coating, thus also just ensure that coating quality and product quality.When not using polyethylene glycol as bonding agent, coating easily blocks spray body; After using this component, coating leave standstill 7 round the clock after still do not produce blocking spray body phenomenon.
Washing powder: weight accounts for 0.2% ~ 0.4% of each component weight of coating.
Further, the order number of described diatomite and quartz sand is greater than 200 orders; The order number of described bentonite and graphite powder is greater than 300 orders.When low mesh number, no matter be diatomite or quartz sand, all easily produce precipitation, and have a strong impact on coating quality.As everyone knows, international powder granule mesh size 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, order number is greater than 200 orders, and particle diameter is then less than 75 microns.
Preferably, described graphite powder is flake graphite.
Preferably, the component of described coating is:
Diatomite: weight accounts for 51.3% of each component weight of coating siccative;
Quartz sand: weight accounts for 30% of each component weight of coating siccative;
Bentonite: weight accounts for 12.5% of each component weight of coating siccative;
Graphite powder: weight accounts for 5.5% of each component weight of coating siccative;
Polyethylene glycol: weight accounts for 0.4% of each component weight of coating;
Washing powder: weight accounts for 0.3% of each component weight of coating.The washing powder that the present invention uses is matured product, and commercially can buy easily, its main component is anion surfactant: sodium alkyl benzene sulfonate.
Coating siccative of the present invention refers to diatomite, quartz sand, bentonite and graphite powder.
Present invention also offers the preparation method of the heat insulating sprayed coating of above-mentioned cylinder sleeve centrifugal casting.
Technical scheme provided by the invention is, provides the preparation method of the heat insulating sprayed coating of above-mentioned cylinder sleeve centrifugal casting, and its preparation method step is as follows:
1) start mixer, add carrier solvent water;
2) add polyethylene glycol and bentonite, stir 2 ~ 3 hours;
3) successively add diatomite, quartz sand and graphite powder, stir 3 ~ 4 hours;
4) add in coating after solution being made in the dissolving of washing powder suitable quantity of water, stir 0.3 ~ 0.5 hour;
5) close down mixer, coating completes.
Further, the ratio of described carrier solvent water controls in 0.6 ~ 0.8 of the total component of sprayed coating, and the proportion of the sprayed coating prepared is 0.8 ~ 1.4.
Preferably, the rotating speed of described mixer is 600 ~ 900 revs/min.
Preferably, described preparation method step is as follows:
1) start mixer, add carrier solvent water;
2) add polyethylene glycol and bentonite, stir 2.5 hours;
3) successively add diatomite, quartz sand and graphite powder, stir 3.5 hours;
4) add in coating after solution being made in the dissolving of washing powder suitable quantity of water, stir 0.4 hour;
5) close down mixer, coating completes.
It is advantageous that the heat insulating sprayed coating adopting this explained hereafter to go out has excellent heat insulating ability, be applicable to the production of various high-performance centrifugal casting product, the levelability of coating is excellent simultaneously, and suspension is splendid.Do not need after coating completes to take any specially treated that 7 can be kept layering not to occur round the clock, precipitation, Component seperation phenomenon.After coating completes 7 round the clock within use, do not need to take any supplementary mode to keep the uniformity of coating.This coating is not only applicable to automatic coating coating, and by the adjustment of proportion, is applicable to traditional Manual feeding mode yet.
Centrifugal cast cylinder sleeve coating use 0.2% ~ 0.6% polyethylene glycol accounting for each component weight of coating as coating bonding agent, make the bonding effect of each component of coating stronger, and enhance mould tack when low temperature, indirectly extend die life, add coating suspension and levelability simultaneously, make coating can keep the combination of each component of coating for a long time, not stratified, be not separated, deposited phenomenon do not occur, extend the use effective time of coating.
By selecting the diatomite of aforementioned each component and specification, quartz sand, bentonite, polyethylene glycol, flake graphite in powder, washing powder and suitable quantity of water, under specific making stirring technique, aforementioned each coating composition is organically combined the novel heat insulation coating made and produce for being suitable for cylinder sleeve centrifugal casting spraying, make coating have excellent heat insulating ability, suspension, levelability, gas permeability, mould tack and release property concurrently.
Detailed description of the invention
Embodiment 1
The raw material of the heat insulating sprayed coating of the present embodiment cylinder sleeve centrifugal casting is:
Diatomite 450g, order number 210 order; Quartz sand 350g, order number 210 order; Bentonite: 150g, order number 320 order; Graphite powder 50g, order number 320 order; Polyethylene glycol 2.1g; Washing powder 4g.The washing powder that the present embodiment uses is common non-phosphide detergent, and main component is anion surfactant: sodium alkyl benzene sulfonate.
Use above-mentioned raw materials to prepare coating, first start mixer, mixer speed setting is 900 revs/min, adds carrier solvent water in mixer, and carrier solvent water accounts for 0.7 of the total component ratio of sprayed coating; Add polyethylene glycol and bentonite, stir after 2 hours, more successively add diatomite, quartz sand and graphite powder, stir after 3 hours, washing powder suitable quantity of water dissolved and add in coating after making solution, stir after 0.3 hour, close down mixer, coating completes.
The coating that the present embodiment prepares can keep the combination of each component of coating in 168 hours, not stratified, was not separated, deposited phenomenon did not occur.
Embodiment 2
The raw material of the heat insulating sprayed coating of the present embodiment cylinder sleeve centrifugal casting is:
Diatomite 550g, order number 300 order; Quartz sand 250g, order number 300 order; Bentonite 120g, order number 350 order; Graphite powder 80g, order number 350 order; Polyethylene glycol: 6g; Washing powder: 2.1g.The washing powder that the present embodiment uses is common non-phosphide detergent, and main component is anion surfactant: sodium alkyl benzene sulfonate.
Use above-mentioned raw materials to prepare coating, first start mixer, mixer speed setting is 600 revs/min, adds carrier solvent water in mixer, and the ratio that carrier solvent water accounts for the total component of sprayed coating is 0.6; Add polyethylene glycol and bentonite, stir after 3 hours, successively add diatomite, quartz sand and graphite powder, stir after 4 hours, washing powder suitable quantity of water is dissolved and adds in coating after making solution, stir 0.5 hour; Close down mixer, coating completes.
The coating that the present embodiment prepares can keep the combination of each component of coating in 170 hours, not stratified, was not separated, deposited phenomenon did not occur.
Embodiment 3
The raw material of the heat insulating sprayed coating of the present embodiment cylinder sleeve centrifugal casting is:
Diatomite 510g, order number 250 order; Quartz sand 310g, order number 250 order; Bentonite 125g, order number 380 order; Graphite powder 55g, order number 380 order; Polyethylene glycol 4g; Washing powder 3g.The washing powder that the present embodiment uses is common non-phosphide detergent, and main component is anion surfactant: sodium alkyl benzene sulfonate.
Use above-mentioned raw materials to prepare coating, first start mixer, mixer speed setting is 750 revs/min, adds carrier solvent water in mixer, 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, washing powder suitable quantity of water is dissolved and adds in coating after making solution, stir after 0.4 hour, close down mixer, coating completes.
The coating that the present embodiment prepares can keep the combination of each component of coating in 168 hours, not stratified, was not separated, deposited phenomenon did not occur.
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred embodiment should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a preparation method for the heat insulating sprayed coating of cylinder sleeve centrifugal casting, is characterized in that, the component of the heat insulating sprayed coating of described cylinder sleeve centrifugal casting is:
Diatomite: weight accounts for 45% ~ 55% of each component weight of coating siccative;
Quartz sand: weight accounts for 25% ~ 35% of each component weight of coating siccative;
Bentonite: weight accounts for 10% ~ 15% of each component weight of coating siccative;
Graphite powder: weight accounts for 3% ~ 8% of each component weight of coating siccative;
Polyethylene glycol: weight accounts for 0.2% ~ 0.6% of each component weight of coating;
Washing powder: weight accounts for 0.2% ~ 0.4% of each component weight of coating
The preparation method step of this coating is as follows:
Start mixer, add carrier solvent water gradually;
Add polyethylene glycol and bentonite, stir 2 ~ 3 hours;
Successively add diatomite, quartz sand and graphite powder, stir 3 ~ 4 hours;
Washing powder suitable quantity of water is dissolved and adds in coating after making solution, stir 0.3 ~ 0.5 hour;
Close down mixer, coating completes.
2. the preparation method of the heat insulating sprayed coating of cylinder sleeve centrifugal casting according to claim 1, is characterized in that, the order number of described diatomite and quartz sand is greater than 200 orders; The order number of described bentonite and graphite powder is greater than 300 orders.
3. the preparation method of the heat insulating sprayed coating of cylinder sleeve centrifugal casting according to claim 1, is characterized in that, described graphite powder is flake graphite.
4. the preparation method of the heat insulating sprayed coating of cylinder sleeve centrifugal casting according to claim 1, is characterized in that, the ratio of described carrier solvent water controls in 0.6 ~ 0.8 of the total component of sprayed coating.
5. the preparation method of the heat insulating sprayed coating of cylinder sleeve centrifugal casting according to claim 1, is characterized in that, the rotating speed of described mixer is 600 ~ 900 revs/min.
6. the preparation method of the heat insulating sprayed coating of cylinder sleeve centrifugal casting according to claim 5, is characterized in that, described preparation method step is as follows:
Start mixer, add carrier solvent water;
Add polyethylene glycol and bentonite, stir 2.5 hours;
Successively add diatomite, quartz sand and graphite powder, stir 3.5 hours;
Washing powder suitable quantity of water is dissolved and adds in coating after making solution, stir 0.4 hour;
Close down mixer, coating completes.
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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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| 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 CN102836949A (en) | 2012-12-26 |
| CN102836949B true CN102836949B (en) | 2014-12-31 |
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Families Citing this family (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 |
| 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 |
| 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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| CN1116141A (en) * | 1995-04-29 | 1996-02-07 | 华南理工大学 | Paint for spun cast pipe |
| CN1911555A (en) * | 2006-08-25 | 2007-02-14 | 蒋文兰 | Alcohoh base casting coating material powder for concave convex rod |
| CN1923402A (en) * | 2006-08-25 | 2007-03-07 | 蒋文兰 | Production method of alcohol-based concave-convex stick suspending agent |
| CN102407279A (en) * | 2011-11-29 | 2012-04-11 | 朱小英 | Method for preparing water-based coating for sand mold casting |
| CN102407277A (en) * | 2011-11-29 | 2012-04-11 | 朱小英 | Method for preparing coating for metal molds for centrifugal pipe casting |
| CN102463331A (en) * | 2010-11-17 | 2012-05-23 | 徐金兰 | Thermal insulation material for centrifugal casting metal mould |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS57171557A (en) * | 1981-04-17 | 1982-10-22 | Teikoku Piston Ring Co Ltd | Centrifugal casting method |
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- 2012-08-22 CN CN201210300133.1A patent/CN102836949B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1116141A (en) * | 1995-04-29 | 1996-02-07 | 华南理工大学 | Paint for spun cast pipe |
| CN1911555A (en) * | 2006-08-25 | 2007-02-14 | 蒋文兰 | Alcohoh base casting coating material powder for concave convex rod |
| CN1923402A (en) * | 2006-08-25 | 2007-03-07 | 蒋文兰 | Production method of alcohol-based concave-convex stick suspending agent |
| CN102463331A (en) * | 2010-11-17 | 2012-05-23 | 徐金兰 | Thermal insulation material for centrifugal casting metal mould |
| CN102407279A (en) * | 2011-11-29 | 2012-04-11 | 朱小英 | Method for preparing water-based coating for sand mold casting |
| CN102407277A (en) * | 2011-11-29 | 2012-04-11 | 朱小英 | Method for preparing coating for metal molds for centrifugal pipe casting |
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