CN102794263B - Nylon 11 coating method of metal butterfly valve - Google Patents
Nylon 11 coating method of metal butterfly valve Download PDFInfo
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- CN102794263B CN102794263B CN201210298397.8A CN201210298397A CN102794263B CN 102794263 B CN102794263 B CN 102794263B CN 201210298397 A CN201210298397 A CN 201210298397A CN 102794263 B CN102794263 B CN 102794263B
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Abstract
The invention discloses a nylon 11 coating method of a metal butterfly valve, which solves the problem of high corrosion damage tendency due to unideal coating effect in the existing metal butterfly valve. The method comprises the following steps: 1. cleaning the metal butterfly valve, and carrying out grit blasting; 2. coating a nylon primer dry film with the thickness of 8-12 mu m on the workpiece; 3. preheating the workpiece to 260-350 DEG C in a heating furnace; 4. putting the preheated workpiece in a fluidized bed, and coating nylon 11; 5. cooling the workpiece in cold water; and 6. repairing the suspension point of the workpiece with nylon 11 powder. The method disclosed by the invention has the advantages of simple technical process, reasonable technical parameters and low technical cost; and the coated film formed on the metal butterfly valve by the method has the advantages of high shock resistance, high wear resistance, favorable corrosion resistance effect and no toxic or side effect.
Description
Technical field
The present invention relates to the surface treatment of metal butterfly valve, particularly a kind of nylon 11 coating process of metal butterfly valve.
Background technology
Butterfly valve is again flap valve, is a kind of a large amount of use, control valve and switching control pilot simple in structure.Butterfly valve refers to that closure member (butterfly plate) is disk, rotates to reach a kind of valve of open and close around valve shaft, and on pipeline, main rising cut off and throttling action.Butterfly valve opening and closing element is a discoidal butterfly plate, and the axis around himself in valve body rotates, thereby reaches the object that opens and closes or regulate.
Butterfly valve structure is simple, relative volume is little, lightweight, formed by a few parts, only need half-twist to get final product fast opening and closing, simple to operate, there is good fluid control characteristic.Butterfly valve is in the time of complete opening, and butterfly plate thickness is MEDIA FLOW unique resistance in the time of valve body, and the Pressure Drop therefore producing by this valve is very little, therefore have good metering characteristics.Except general medium, butterfly valve is the suitable special media that transports also--mud, under low pressure, can realize good sealing, and adjusting function is good.
Butterfly valve is applicable to carry in the engineering systems such as chemical industry, desalinization, petrochemical industry, town gas, cold and hot air and generation environment-friendly the pipeline of various corrosivity, non-corrosive fluids medium, for regulating and block flowing of medium.Butterfly valve is in recent ten years one of valve kind with fastest developing speed.Particularly in U.S., day, moral, Fa Deng industrially developed country, the use of butterfly valve is very extensive. and the kind of use and quantity are still in continuous expansion, and develop to high temperature, high pressure, heavy caliber, high leakproofness, long-life, good control characteristic and a valve multifunctional direction, its reliability and other performance indications all reach higher level, and part replaces gate valve and ball valve.Along with the progress of butterfly valve technology, in predictable future, particularly in the use field of big-and-middle-sized bore, mesolow power, the valve version that butterfly valve will become to take as the leading factor.
Because metal butterfly valve is often used in compared with corrosive medium environment such as strong acid, alkali, salt, therefore its surface needs application and liner anti-corrosion material with adaptation condition environmental requirement mostly.At present, mainly contain for metal butterfly valve corrosion-resistant material: plastic cement butterfly valve, galss fiber reinforced resin butterfly valve and the stainless steel butterfly valves such as phenolic resins application butterfly valve, polyvinyl chloride.Although these conventional anticorrosion butterfly valves have Anticorrosive Character separately, also all have certain defect simultaneously.Phenolic resins butterfly valve: phenolic resins butterfly valve acid resistance is good, but not powerful oxidation corrosion resistance acid, due in molecular structure with phenolic hydroxyl group, this structure is with faintly acid, so alkali-proof medium not; In molecular structure, contain in addition a large amount of rigidity phenyl ring and polarity hydroxyl, so fragility is very big, wearability is poor.The plastic cement butterfly valves such as polyvinyl chloride: the decay resistance of polyvinyl chloride and temperature, stress are relevant, and temperature is higher, and stress is larger, and corrosion rate is faster, easily degraded under the effect of light, heat, oxygen in addition, therefore polypropylene cannot be used on strong oxidizer.Galss fiber reinforced resin valve: maximum feature is exactly that acid resistance is good, but not powerful oxidation corrosion resistance acid, due in molecular structure with phenolic hydroxyl group, this structure is with faintly acid, so alkali-proof medium not.Stainless steel butterfly valve: corrosion resistance is good, but anti-corrosion capability depends primarily on the alloy material adding in stainless steel material, normal appearance point burn into intercrystalline corrosion and stress-corrosion cracking, more easily corrosion under the environment that chlorion exists.In addition,, compared with other materials, it involves great expense.
The formal name used at school of nylon 11 is polyamide 11(PA11), its chemical structural formula is H ［ NH(CH2) 10CO ］ nOH, and fusing point is 186 DEG C ± 5, and non-fracture temperature is-40 DEG C.Nylon 11 is as a kind of high-carbon quantity raw material, during as coating, there is excellent low water absorbable, high-dimensional stability and good melt fluidity, nylon 11 has the mechanical properties such as excellent wearability, impact resistance and pliability, good electrical insulating property, wider operating temperature and good thermal insulation, nylon 11 has good chemical characteristic, resistance to strong salt, inorganic salts, most solvent and organic acid, nylon film can sea water resistance 6a, salt spray resistance 2000h. weatherability is also fine, and therefore nylon 11 becomes the polyamide that is widely used as in the world coating most.Nylon 11 belongs to long-chain nylon.Its water absorption rate is low, and fusing point is also lower.Because the water absorption rate of long-chain nylon is lower, the excellent size stability of goods, is mainly used in the fields such as automobile, electrical equipment, machinery and pipeline corrosion protection
.nylon 11 powder coating is a lot of in the method for metal surface, common are cold spraying method, fluid bed infusion process, electrostatic fluidized bed method, flame spraying and plasma arc flame spraying process etc.
In prior art document, being coated with about nylon powder the relevant report that installs to valve surface at home mainly contains: for the nylon valve plate (96243682.8) with metallic framework of butterfly valve; A kind of nylon ball valve and preparation method thereof (200810059513.4).These two patents are all clearly for the specific category of the nylon powder of application, and only at valve local location application nylon powder, can not adapt to the requirement of the higher requirement for anticorrosion of modern chemical industry and desalinization and complicated corrosive environment.
Summary of the invention
The object of the invention is to be easily corroded the problem of damage in order to solve the metal butterfly valve existing in above-mentioned prior art, and a kind of nylon 11 coating process of metal butterfly valve is provided.
The present invention is achieved by the following technical solutions:
A nylon 11 coating process for metal butterfly valve, comprises the steps:
1) clean: use acidity or alkaline cleaner and clean hot water successively metal butterfly valve to be processed to be carried out to cleaning treatment, in order to remove the grease impurity that is attached to metal butterfly valve surface, make metal butterfly valve obtain a clean surface.
2) sandblast: the metal butterfly valve cleaning is carried out to blasting treatment, and in order to remove oxide skin, rust and other impurity on metal butterfly valve surface, finally making metal butterfly valve obtain cleannes is that Sa2.1, roughness are the surface of Rz40-80 μ m.
3) prime: the metal butterfly valve to blasting treatment carries out primer coating, make metal butterfly valve surface form a dry paint that thickness is 8-12 μ m; Concrete painting method is: get nylon coating base paint special, and to adding butyl glycol ether to dilute in it, make the nylon coating base paint special viscosity after dilution reach 14-15 μ; Then the nylon coating base paint special of metal butterfly valve being put into after dilution soaks 1-3 second, finally takes out metal butterfly valve and natural drying in air.Butyl glycol ether is the solvent of nylon coating base paint special, is a kind of coalescents, is used for regulating viscosity, the drying time etc. of nylon coating base paint special; In addition, adding of butyl glycol ether the glossiness of workpiece (workpiece refers to metal butterfly valve, lower same) is had to good raising.Find through repetition test, when the viscosity of nylon coating base paint special is 14-15 μ, can ensure that priming paint obtains suitable thickness on workpiece, if viscosity too greatly can strengthen priming paint thickness, thereby reduce the adhesion of workpiece and nylon 11, if the too little priming paint thickness that can reduce of viscosity, does not have the effect of priming paint enhancing adhesion.
4) heating: the metal butterfly valve that has applied priming paint is placed in to heating furnace and heats, the heating-up temperature of heating furnace is generally at 270-370 DEG C, and measures metal butterfly valve surface temperature in good time, comes out of the stove in the time that metal butterfly valve surface temperature reaches 260-350 DEG C.The fusing point of nylon 11 powder is 186-187 DEG C, consider simultaneously workpiece come out of the stove laggard enter cooling naturally in fluid-bed process, learn through repetition test: if the tapping temperature of workpiece lower than 260-350 DEG C, workpiece cannot apply; If higher than 260-350 DEG C, easily there is the problems such as the surface irregularity after the too thick of workpiece coating or coating in the tapping temperature of workpiece.
5) coating nylon: the metal butterfly valve of coming out of the stove is placed in to the fluid bed that fills nylon 11 powder rapidly and floods 3-6 second, then take out and blow down with air jet system the nylon 11 powder not melting on metal butterfly valve.
6) cooling: in the time having applied the metal butterfly valve surface temperature of nylon 11 and be naturally down to 95-100 DEG C, be placed on temperature and be in the cold water of 5-35 DEG C and carry out cooling processing, the nylon 11 levelling that metal butterfly valve surface is applied, after the nylon 11 applying on metal butterfly valve surface solidifies, by its taking-up natural drying in air.As workpiece adopts the nature type of cooling, not only work-piece cools speed is slow, on production line the time of staying longer, the production line corresponding lengthening of also having to, and the naturally cooling film performance obtaining and outward appearance not good yet.Therefore, the suitable employing Constraint Cooling Technology of this step, determines in the time that workpiece surface temperature is 95-100 DEG C through repetition test, forces cooling effect best; The degree of crystallinity of cooling velocity on film and gloss appearance impact are larger, thereby workpiece are immersed in aqueous medium rapid when cooling in suitable temperature (being 95-100 DEG C), can be more satisfied with, appearance of film and the performance of better effects if.If workpiece surface temperature is too high while putting into cold water, because workpiece shrinks rapidly, may have influence on the adhesion of film and workpiece.
7) repair hanging point: be coated with and spread nylon 11 powder at the hanging point place of metal butterfly valve, first with electric iron, nylon 11 powder is melted, then with flame gun by the nylon 11 levelling melting.
In coating process of the present invention, adopting blasting craft is the effective way that metal surface obtains good cleannes and roughness to the metal structure surface eliminate rust pretreatment of etc.ing, and surface-treated quality directly affects the adhesive force of coating to quilt painting workpiece base material and the decay resistance of material.
The principle of blasting craft: with the abrasive material impact surface of the work of high-speed flight, be that impulsive force and frictional force are removed the impurity such as the iron rust on workpiece by the kinetic transformation of abrasive material.When rust cleaning, surface of the work has been subject to the effect of impulsive force, this impulsive force has not only been removed the oxide skin of surface of the work, rust and dirt etc., make its surface obtain certain roughness simultaneously, be that sand grains makes to have produced distortion under the effect of surface of the work fiber in impulsive force at impact surface of the work, and this distortion is when power is cancelled, can not restore, leave thickly dotted pit at surface of the work, the degree of depth of pit is probably in 5～10 μ m left and right, these pits are exactly the residual deformation retaining on workpiece face after sandblast, in the time of application, paint or coating build-in are in these pits, greatly improve the adhesive force of film.
Nozzleman's artistic skill makes workpiece produce certain distortion, and the thin workpiece impact that rigidity is little is larger.The reason that produces distortion is because the effect of sandblast process residual stress.This distortion has exceeded the scope of strain, has met or exceeded the yield limit of workpiece, thereby makes surface of the work fiber produce certain plastic deformation, makes fibrous inside produce compression.Relevant research data according to machine-building shows, this residual compressive stress can strengthening workpiece surface, eliminates the residual tension of workpiece steel component surface, strengthens wearability, the corrosion resistance of surface of the work, can improve significantly the fatigue resistance of material.
In the present invention, apply when workpiece coating nylon 11 powder in fluid bed, fluid bed is made up of porous barrier and container, and container is divided into upper and lower two parts by porous barrier.Its course of work: pass into compressed air to the container part below dividing plate, compressed air makes powder above suspended by the effect of air stream by porous barrier, and rolls in upper container, presents " boiling " state.Reach the effect of coating by the powder zone of " boiling " through the workpiece of preheating.
The operation principle of fluid bed: by powder bed, powder particle is stirred and be fluidization with equally distributed thin loose air stream.After air-flow and powder equilibrium establishment, keep certain interfacial level.By after the workpiece preheating of need coating, put into powder, can obtain uniform coating, (levelling) film forming is finally heating and curing.
Further, described nylon coating base paint special adopts the nylon coating priming paint of trade name Primgreen LAT 12035.Primgreen LAT 12035 nylon coating priming paint strong adhesions, are applied to surface of workpiece, can effectively improve nylon 11 powder and be attached to the viscosity on workpiece, improve the corrosion resistance of workpiece.In addition, Primgreen LAT 12035 nylon coating priming paint are the priming paint of a kind of low VOC and solvent borne, the protection requirement of compound developed country and China's environment.
Each technological parameter in the inventive method is all the optimum optimization parameter drawing through repetition test.Each performance of the nylon 11 coating of the metal butterfly valve being obtained by the inventive method application, in table 1:
Table 1: metal butterfly valve nylon 11 coating performance table
The inventive method technical process is simple, technological parameter is reasonable, and the film that metal butterfly valve forms by this method has high impact-resistant and wearability.Excellent anti-corrosive properties and anti-chemistry, under general water and wastewater industry environment, nylon 11 coating reaches more than 50 years service life, under briny environment, nylon 11 coating soak 6 years non-foaming, reach and exceeded some best stainless steels of antiseptic property, and the cost ratio stainless steel of its application butterfly valve is low more than 2 times.Compared with other materials, nylon 11 coating has low-down surface roughness coefficient, and water delivery pressure is little, and the loss of flood peak is few, and energy-saving effect is obvious.In addition,, because nylon 11 raw material is mainly derived from castor oil, therefore nylon 11 coating meets multiple national direct drinking standards such as Britain, France, Japan with its safety non-toxic.
Detailed description of the invention
Embodiment 1
A nylon 11 coating process for metal butterfly valve, is characterized in that, comprises the steps:
1) clean: metal butterfly valve to be processed is put into the container that fills acidity or alkaline cleaner and carry out cleaning treatment, clean up rear taking-up, with clean hot water, workpiece is cleaned once more again, hang-up is dried, object is to remove the grease impurity that is attached to metal butterfly valve surface, makes metal butterfly valve obtain a clean surface.
2) sandblast: cleaned metal butterfly valve is placed horizontally on sand-blasting machine conveyer belt, metal butterfly valve is entered and in sand-blasting machine, carry out blasting treatment, in order to remove oxide skin, rust and other impurity on metal butterfly valve surface, finally making metal butterfly valve obtain cleannes is that Sa2.1, roughness are the surface of Rz60 μ m.
3) prime: the metal butterfly valve to blasting treatment carries out primer coating, make metal butterfly valve surface form a dry paint that thickness is 8 μ m; Concrete painting method is: get nylon coating base paint special, and add butyl glycol ether to dilute, make the nylon coating base paint special viscosity after dilution reach 15 μ; Then the nylon coating base paint special of metal butterfly valve being put into after dilution soaks 1 second, finally takes out metal butterfly valve natural drying in air; Wherein, the trade name of the nylon coating base paint special of use is: Primgreen LAT 12035.
4) heating: the metal butterfly valve that has applied priming paint is placed in to heating furnace and heats, and use temperature measurer to measure metal butterfly valve surface temperature in good time, come out of the stove in the time that metal butterfly valve surface temperature reaches 290 DEG C.
5) coating nylon: the metal butterfly valve of coming out of the stove is placed in rapidly to the fluid bed that fills nylon 11 powder and floods 3 seconds, then take out and blow down with air jet system the nylon 11 powder not melting on metal butterfly valve.
6) cooling: in the time having applied the metal butterfly valve surface temperature of nylon 11 and be naturally down to 98 DEG C, be placed on temperature and be in the cold water of 15 DEG C and carry out cooling processing, the nylon 11 levelling that metal butterfly valve surface is applied, after the nylon 11 applying on metal butterfly valve surface solidifies, by its taking-up natural drying in air.
7) repair hanging point: be coated with and spread nylon 11 powder at the hanging point place of metal butterfly valve, first with electric iron, nylon 11 powder is melted, then with flame gun by the nylon 11 levelling melting.
Embodiment 2
A nylon 11 coating process for metal butterfly valve, is characterized in that, comprises the steps:
1) clean: metal butterfly valve to be processed is put into the container that fills acidity or alkaline cleaner and carry out cleaning treatment, clean up rear taking-up, with clean hot water, workpiece is cleaned once more again, hang-up is dried, object is to remove the grease impurity that is attached to metal butterfly valve surface, makes metal butterfly valve obtain a clean surface.
2) sandblast: cleaned metal butterfly valve is placed horizontally on sand-blasting machine conveyer belt, metal butterfly valve is entered and in sand-blasting machine, carry out blasting treatment, in order to remove oxide skin, rust and other impurity on metal butterfly valve surface, finally making metal butterfly valve obtain cleannes is that Sa2.1, roughness are the surface of Rz80 μ m.
3) prime: the metal butterfly valve to blasting treatment carries out primer coating, make metal butterfly valve surface form a dry paint that thickness is 11 μ m; Concrete painting method is: get nylon coating base paint special, and add butyl glycol ether to dilute, make the nylon coating base paint special viscosity after dilution reach 15 μ; Then the nylon coating base paint special of metal butterfly valve being put into after dilution soaks 3 seconds, finally takes out metal butterfly valve natural drying in air; Wherein, the trade name of the nylon coating base paint special of use is: Primgreen LAT 12035.
4) heating: the metal butterfly valve that has applied priming paint is placed in to heating furnace and heats, and use temperature measurer to measure metal butterfly valve surface temperature in good time, come out of the stove in the time that metal butterfly valve surface temperature reaches 320 DEG C.
5) coating nylon: the metal butterfly valve of coming out of the stove is placed in rapidly to the fluid bed that fills nylon 11 powder and floods 4 seconds, then take out and blow down with air jet system the nylon 11 powder not melting on metal butterfly valve.
6) cooling: in the time having applied the metal butterfly valve surface temperature of nylon 11 and be naturally down to 100 DEG C, be placed on temperature and be in the cold water of 5 DEG C and carry out cooling processing, the nylon 11 levelling that metal butterfly valve surface is applied, after the nylon 11 applying on metal butterfly valve surface solidifies, by its taking-up natural drying in air.
7) repair hanging point: be coated with and spread nylon 11 powder at the hanging point place of metal butterfly valve, first with electric iron, nylon 11 powder is melted, then with flame gun by the nylon 11 levelling melting.
Embodiment 3
A nylon 11 coating process for metal butterfly valve, is characterized in that, comprises the steps:
1) clean: metal butterfly valve to be processed is put into the container that fills acidity or alkaline cleaner and carry out cleaning treatment, clean up rear taking-up, with clean hot water, workpiece is cleaned once more again, hang-up is dried, object is to remove the grease impurity that is attached to metal butterfly valve surface, makes metal butterfly valve obtain a clean surface.
2) sandblast: cleaned metal butterfly valve is placed horizontally on sand-blasting machine conveyer belt, metal butterfly valve is entered and in sand-blasting machine, carry out blasting treatment, in order to remove oxide skin, rust and other impurity on metal butterfly valve surface, finally making metal butterfly valve obtain cleannes is that Sa2.1, roughness are the surface of Rz40 μ m.
3) prime: the metal butterfly valve to blasting treatment carries out primer coating, make metal butterfly valve surface form a dry paint that thickness is 12 μ m; Concrete painting method is: get nylon coating base paint special, and to adding butyl glycol ether to dilute in it, make the nylon coating base paint special viscosity after dilution reach 14 μ; Then the nylon coating base paint special of metal butterfly valve being put into after dilution soaks 3 seconds, finally takes out metal butterfly valve natural drying in air; Wherein, the trade name of the nylon coating base paint special of use is: Primgreen LAT 12035.
4) heating: the metal butterfly valve that has applied priming paint is placed in to heating furnace and heats, and use temperature measurer to measure metal butterfly valve surface temperature in good time, come out of the stove in the time that metal butterfly valve surface temperature reaches 350 DEG C.
5) coating nylon: the metal butterfly valve of coming out of the stove is placed in rapidly to the fluid bed that fills nylon 11 powder and floods 5 seconds, then take out and blow down with air jet system the nylon 11 powder not melting on metal butterfly valve.
6) cooling: in the time having applied the metal butterfly valve surface temperature of nylon 11 and be naturally down to 95 DEG C, be placed on temperature and be in the cold water of 35 DEG C and carry out cooling processing, the nylon 11 levelling that metal butterfly valve surface is applied, after the nylon 11 applying on metal butterfly valve surface solidifies, by its taking-up natural drying in air.
7) repair hanging point: be coated with and spread nylon 11 powder at the hanging point place of metal butterfly valve, first with electric iron, nylon 11 powder is melted, then with flame gun by the nylon 11 levelling melting.
Embodiment 4
A nylon 11 coating process for metal butterfly valve, is characterized in that, comprises the steps:
1) clean: metal butterfly valve to be processed is put into the container that fills acidity or alkaline cleaner and carry out cleaning treatment, clean up rear taking-up, with clean hot water, workpiece is cleaned once more again, hang-up is dried, object is to remove the grease impurity that is attached to metal butterfly valve surface, makes metal butterfly valve obtain a clean surface.
2) sandblast: cleaned metal butterfly valve is placed horizontally on sand-blasting machine conveyer belt, metal butterfly valve is entered and in sand-blasting machine, carry out blasting treatment, in order to remove oxide skin, rust and other impurity on metal butterfly valve surface, finally making metal butterfly valve obtain cleannes is that Sa2.1, roughness are the surface of Rz70 μ m.
3) prime: the metal butterfly valve to blasting treatment carries out primer coating, make metal butterfly valve surface form a dry paint that thickness is 9 μ m; Concrete painting method is: get nylon coating base paint special, and to adding butyl glycol ether to dilute in it, make the nylon coating base paint special viscosity after dilution reach 14 μ; Then the nylon coating base paint special of metal butterfly valve being put into after dilution soaks 2 seconds, finally takes out metal butterfly valve natural drying in air; Wherein, the trade name of the nylon coating base paint special of use is: Primgreen LAT 12035.
4) heating: the metal butterfly valve that has applied priming paint is placed in to heating furnace and heats, and use temperature measurer to measure metal butterfly valve surface temperature in good time, come out of the stove in the time that metal butterfly valve surface temperature reaches 260 DEG C.
5) coating nylon: the metal butterfly valve of coming out of the stove is placed in rapidly to the fluid bed that fills nylon 11 powder and floods 6 seconds, then take out and blow down with air jet system the nylon 11 powder not melting on metal butterfly valve.
6) cooling: in the time having applied the metal butterfly valve surface temperature of nylon 11 and be naturally down to 97 DEG C, be placed on temperature and be in the cold water of 25 DEG C and carry out cooling processing, the nylon 11 levelling that metal butterfly valve surface is applied, after the nylon 11 applying on metal butterfly valve surface solidifies, by its taking-up natural drying in air.
7) repair hanging point: be coated with and spread nylon 11 powder at the hanging point place of metal butterfly valve, first with electric iron, nylon 11 powder is melted, then with flame gun by the nylon 11 levelling melting.
Claims (2)
1. a nylon 11 coating process for metal butterfly valve, is characterized in that, comprises the steps:
1) clean: use acidity or alkaline cleaner and clean hot water successively metal butterfly valve to be processed to be carried out to cleaning treatment, in order to remove the grease impurity that is attached to metal butterfly valve surface, make metal butterfly valve obtain a clean surface;
2) sandblast: the metal butterfly valve cleaning is carried out to blasting treatment, and in order to remove oxide skin, rust and other impurity on metal butterfly valve surface, finally making metal butterfly valve obtain cleannes is that Sa2.1, roughness are the surface of Rz40-80 μ m;
3) prime: the metal butterfly valve to blasting treatment carries out primer coating, make metal butterfly valve surface form a dry paint that thickness is 8-12 μ m; Concrete painting method is: get nylon coating base paint special, and add butyl glycol ether to dilute, make the nylon coating base paint special viscosity after dilution reach 14-15 μ; Then the nylon coating base paint special of metal butterfly valve being put into after dilution soaks 1-3 second, finally takes out metal butterfly valve and natural drying in air;
4) heating: the metal butterfly valve that has applied priming paint is placed in to heating furnace and heats, and use temperature measurer to measure metal butterfly valve surface temperature in good time, come out of the stove in the time that metal butterfly valve surface temperature reaches 260-350 DEG C;
5) coating nylon: the metal butterfly valve of coming out of the stove is placed in rapidly to the fluid bed that fills nylon 11 powder and floods 3-6 second, then take out and blow down with air jet system the nylon 11 powder not melting on metal butterfly valve;
6) cooling: in the time having applied the metal butterfly valve surface temperature of nylon 11 and be naturally down to 95-100 DEG C, be placed on temperature and be in the cold water of 5-35 DEG C and carry out cooling processing, the nylon 11 levelling that metal butterfly valve surface is applied, after the nylon 11 applying on metal butterfly valve surface solidifies, by its taking-up natural drying in air;
7) repair hanging point: be coated with and spread nylon 11 powder at the hanging point place of metal butterfly valve, first with electric iron, nylon 11 powder is melted, then with flame gun by the nylon 11 levelling melting.
2. the nylon 11 coating process of metal butterfly valve according to claim 1, is characterized in that: described nylon coating base paint special adopts the nylon coating priming paint of trade name Primgreen LAT 12035.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210298397.8A CN102794263B (en) | 2012-08-21 | 2012-08-21 | Nylon 11 coating method of metal butterfly valve |
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|---|---|---|---|
| CN201210298397.8A CN102794263B (en) | 2012-08-21 | 2012-08-21 | Nylon 11 coating method of metal butterfly valve |
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| CN102794263B true CN102794263B (en) | 2014-06-18 |
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| CN104056767A (en) * | 2013-03-22 | 2014-09-24 | 派瑞格医疗器械（常州）有限公司 | Method for spraying nylon on metal surface |
| CN104984881B (en) * | 2015-06-10 | 2017-10-17 | 山西银河镀锌有限公司 | A kind of fluid bed production system and method for application nylon flange |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032910A (en) * | 1988-10-24 | 1989-05-17 | 水电部天津勘测设计院科研所 | The coating processes of the anti scuffing protective finish of the multi-level combination in metal surface |
| CN2277468Y (en) * | 1996-10-18 | 1998-04-01 | 钱耀清 | Nylon valve with metal frame for ues in butterfly valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050048218A1 (en) * | 2003-08-29 | 2005-03-03 | Weidman Larry G. | Process for coating substrates with polymeric compositions |
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2012
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032910A (en) * | 1988-10-24 | 1989-05-17 | 水电部天津勘测设计院科研所 | The coating processes of the anti scuffing protective finish of the multi-level combination in metal surface |
| CN2277468Y (en) * | 1996-10-18 | 1998-04-01 | 钱耀清 | Nylon valve with metal frame for ues in butterfly valve |
Non-Patent Citations (6)
| Title |
|---|
| 国外尼龙粉末静电喷涂工艺;徐茂昌;《江苏化工》;19850630(第2期);第43页二、喷涂技术与工艺 * |
| 张继伟.铸铁阀门的粉末涂层工艺探讨.《阀门》.2009,(第3期),第20-22页. |
| 徐茂昌.国外尼龙粉末静电喷涂工艺.《江苏化工》.1985,(第2期),第42-47页. |
| 戴军.聚酰胺11固体粉末涂料.《汽车工艺与材料》.2004,(第11期),第40-43页. |
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| 铸铁阀门的粉末涂层工艺探讨;张继伟;《阀门》;20090630(第3期);全文 * |
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