CN110629167A - Surface layer vacuum coating process for temperature control valve - Google Patents
Surface layer vacuum coating process for temperature control valve Download PDFInfo
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- CN110629167A CN110629167A CN201911065185.3A CN201911065185A CN110629167A CN 110629167 A CN110629167 A CN 110629167A CN 201911065185 A CN201911065185 A CN 201911065185A CN 110629167 A CN110629167 A CN 110629167A
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- control valve
- temperature control
- surface layer
- vacuum coating
- temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
- B05D7/26—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials synthetic lacquers or varnishes
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
Abstract
A surface layer vacuum coating process of a temperature control valve comprises the following steps: the method comprises the following steps of cleaning the surface, eliminating static electricity, spraying primer, baking the primer, carrying out vacuum coating, heating and evaporating a non-metal coating material under a vacuum condition, so that atoms and molecules of the non-metal coating material escape from the surface of the non-metal coating material by virtue of thermal motion, fly to the plastic surface layer of the temperature control valve and are adsorbed and nucleated, and a compact uniform-thickness non-metal coating layer with uniform thickness is gradually formed. The temperature control valve manufactured by the invention not only keeps the excellent performance of the existing metal coating, but also ensures the accurate reflection of the temperature bulb on the indoor environment temperature.
Description
Technical Field
The invention relates to the field of coating, in particular to a vacuum coating process for a surface layer of a temperature control valve. The coating process is widely applied to the heating and ventilation field, and can reduce the influence of the temperature control valve product on the indoor temperature.
Background
The temperature control valve controls the inlet flow of a heat exchanger, an air conditioning unit or other heat and cold equipment and primary heat (cold) medium to control the outlet temperature of the equipment; when the load changes, the flow is adjusted by changing the opening degree of the valve to eliminate the influence caused by the fluctuation of the load, so that the temperature is recovered to the set value.
In the prior art, a chromium metal layer is electroplated on the surface layer of the temperature control valve by using an electroplating process, the electroplating process is a method for paving a metal layer on a conductor by using an electrolysis principle, and the electroplating refers to a surface processing method for depositing cations of preplated metal in a plating solution on the surface of a matrix metal by using the plated matrix metal as a cathode in a salt solution containing the preplated metal through an electrolysis action to form a plating layer.
The electroplating can only be plated with a metal or alloy layer, but the metal or alloy layer has a large influence on the temperature, and taking a common metal chromium layer as an example, since chromium is a metal with a large specific heat capacity, the following principle problems exist in the design in practice: when the heating installation passes through temperature control valve body, because of the valve body is the copper product that the heat conductivity is good, the valve body will heat up fast, and because temperature control head surface plated one deck metallic chromium, the chromium layer on temperature control head surface can be conducted to the heat, the chromium layer temperature will be higher than the ambient temperature in room, the heat that the thermal bulb responded to this moment will no longer be indoor ambient temperature, but carried the heat that the heating installation conducted in the pipeline, that is to say this moment the thermal bulb receives the influence of chromium layer great, can not accurately reflect indoor ambient temperature. According to the EN215 standard, the influence caused by the temperature variation of the water at 30 ℃ through the valve cannot exceed 1.5 ℃, at which time the bulb will not guarantee this standard and the bulb will lose its original function of design.
Therefore, there is a need for a heater that can maintain the effect of the existing electroplated chromium, and can not conduct the heat of the heater to the temperature control head to affect the accuracy of the temperature in the bulb sensing chamber.
Disclosure of Invention
In view of the problems of the background art, the present invention provides a vacuum coating process for a surface layer of a temperature control valve, which will be further described below.
According to the invention, the non-metal material with lower heat conduction coefficient is evaporated and plated on the surface layer of the temperature control valve in a vacuum manner, so that the temperature control head not only maintains the excellent performances of the existing metal plated layer, such as glossiness, difficulty in scratching, difficulty in pollution and the like, but also can accurately reflect the indoor environment temperature.
The invention provides a vacuum coating process for a surface layer of a temperature control valve, wherein the temperature control valve is provided with a plastic surface layer, the plastic surface layer is made of high-temperature-resistant plastic materials, and a coating material of a film to be formed is a non-metal coating material with a lower heat conductivity coefficient, and the vacuum coating process specifically comprises the following steps:
s1, cleaning the surface, and cleaning the surface layer of the temperature control valve until the surface layer has no impurities;
s2, eliminating static electricity, and performing anti-static treatment on the surface layer of the temperature control valve to eliminate static electricity;
s3, spraying a primer, and uniformly spraying a layer of primer on the surface layer of the temperature control valve;
s4, baking the primer, accelerating the curing rate of the primer and forming a smooth and flat surface;
s5, vacuum coating, heating the coating material under vacuum condition, wherein atoms and molecules of the coating material fly to the surface of the temperature control valve and are adsorbed to form a layer of film gradually.
And further, after vacuum coating, spraying finish paint, and spraying a paint surface on the surface of the temperature control valve plated with the vacuum coating to form a finish paint layer.
Furthermore, the method also comprises baking the finish paint after spraying the finish paint, and baking the finish paint to accelerate the curing rate of the finish paint and form a smooth and flat surface.
Further, in the step S1, cleaning water is adopted for washing and cleaning, the pH value of the cleaning water is 6.5-7.5, and the concentration of chloride ions is 25 ppm; when in washing, the axis of the temperature control valve is vertical to the water flow direction and rotates at a constant speed around the axis, so that all surfaces are fully contacted with the water flow section, the speed of the water flow is within 6.0-7.0 m/s, and the washing time is within 3.0-5.0 s; and after the flushing is finished, air drying is carried out by adopting compressed air, the flow velocity of the air flow is within 15-20 m/s, and the air drying time of the temperature control valve is not less than 5 min.
Further, the static elimination of S2 humidifies the environment by the humidifier, increases the relative humidity of the environment, and increases the relative humidity to 65%.
Further, baking the primer by the S4 screen, and putting the temperature control valve with the undried surface layer into a baking box, wherein the baking temperature in the baking box is 60-80 ℃, and the baking time is 2-3 hours.
After the temperature control valve manufactured by adopting the surface layer vacuum coating process of the temperature control valve passes through water at the temperature of 30 ℃, the temperature change of a valve body thermal bulb of the temperature control valve caused by the temperature change of the water does not exceed 1 ℃, and the EN215 standard is met. The temperature control valve manufactured by the invention not only maintains the excellent performance of the existing metal coating, but also ensures the accurate reflection of the temperature bulb on the indoor environment temperature, namely, meets the provisions of EN215 standard 6.4.1.12.
Drawings
FIG. 1: performance plots meeting EN215 standards.
Detailed Description
In order to further understand the features and other objects of the present invention, the following detailed description will be given with reference to specific embodiments, which are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention.
Vacuum deposition is a method of forming a thin film by heating a metal or non-metal material under high vacuum to evaporate and condense the material on the surface of a workpiece (metal, semiconductor or insulator). It is known that the surface of some materials can have many new and good physical and chemical properties only by plating a thin film, so that the thermal conductivity coefficient of the material can be changed by plating a non-metal material on the thermal control head, thereby providing technical possibility for solving the technical problems provided by the invention.
According to the invention, the surface layer of the temperature control valve is coated with the non-metal material with lower heat conduction coefficient through vacuum evaporation, so that the temperature control head not only maintains the excellent performance of the existing metal coating layer, but also ensures the accurate reflection of the temperature bulb on the indoor environment temperature, namely, the temperature control head meets the requirements of EN215 standard 6.4.1.12, and the process adopts simple equipment and is easy to operate; the prepared film has high purity, uniform thickness, high film forming speed and high efficiency.
The invention provides a vacuum coating process for a surface layer of a temperature control valve, wherein the temperature control valve is provided with a plastic surface layer, the plastic surface layer is made of high-temperature-resistant plastic and can resist high temperature of 150-260 ℃, a coating material of a film to be formed is a non-metal coating material with a lower heat conductivity coefficient, and the heat conductivity coefficient of the non-metal coating material is close to or the same as that of air, and the process specifically comprises the following steps:
s1, cleaning the surface, and cleaning the surface layer of the temperature control valve until the surface layer has no impurities;
specifically, when the surface of the temperature control valve is cleaned, the temperature control valve is washed and cleaned by using cleaned water, the pH value of the cleaned water is 6.5-7.5, the preferable pH value is 7.0, and the concentration of chloride ions in the water is 25 ppm; when in washing, the axis of the temperature control valve is vertical to the water flow direction and rotates at a constant speed around the axis, so that all surfaces are fully contacted with the water flow section, the speed of the water flow is between 6.0m/s and 7.0m/s, and the washing time is within 3.0s to 5.0 s; after the flushing is finished, air drying is carried out, the air drying is carried out by adopting compressed air, the air flow from a compressor is maintained within 15-20 m/s, and the air drying time of the temperature control valve is not less than 5min until no impurities, flying dust and oil stains are attached to the surface appearance.
S2, eliminating static electricity, namely performing anti-static treatment on the surface layer of the temperature control valve to eliminate the static electricity;
particularly, the operation of humidifying the space environment is facilitated through the flowing operation of the upstream and downstream production lines of the temperature control valve, the environment is humidified through the humidifier, the relative humidity of the environment is increased, the relative humidity is improved to 65%, the static electricity is completely eliminated, and the adverse effect of the coating effect of the vacuum coating is avoided.
S3, spraying a primer, and uniformly spraying a layer of primer on the surface layer of the temperature control valve;
when the surface layer of the temperature control valve is subjected to vacuum coating, a layer of primer is sprayed on the surface layer of the temperature control valve in advance, and then vacuum coating operation is carried out; because the temperature control valve has the plastics top layer, the flatness on its top layer often can not satisfy the requirement of vacuum coating technology, and its reason lies in: on one hand, air bubbles and organic gas can be remained in the injection molding process of the plastic surface layer during manufacturing, on the other hand, water vapor in the air can be absorbed during placement, and the surface flatness of the temperature control valve is insufficient due to the comprehensive effect. Furthermore, because the surface of the temperature control valve body is not smooth enough, after direct vacuum coating, the surface of the temperature control valve body has low flatness, low glossiness and poor metal feeling, and can generate bad conditions such as bubbles, blisters and the like; in this embodiment, before vacuum coating, a layer of primer is sprayed on the surface layer of the temperature control valve to form a smooth and flat surface on the surface layer of the temperature control valve, and the purpose of the primer is mainly three: firstly, the binding force between the subsequent coating layer and the plastic surface layer is increased; secondly, in order to seal the temperature control valve substrate, the influence of plastic outgassing on the quality of a coating layer in the subsequent coating process is reduced; thirdly, the smoothness of the plastic surface layer is further improved.
Specifically, when the primer is sprayed, the atomized primer is uniformly sprayed on the surface layer of the temperature control valve by the atomizing nozzle in a normal-temperature environment of 20 ℃ in a windless environment to form a smooth and flat surface, the formation of the primer avoids the generation of bubbles and blisters existing in the temperature control valve, and a coating substrate with extremely high flatness is provided for vacuum coating.
S4, baking the primer to accelerate the curing rate of the primer and form a smooth and flat surface;
specifically, after the primer is sprayed, the temperature control valve with the undried surface primer is placed into a baking oven to be dried, the baking of the primer is accelerated, the baking temperature in the baking oven is 60-80 ℃, the baking time is 2-3 hours, and the optimal primer layer is obtained.
S5, vacuum coating, namely heating and evaporating the non-metal coating material such as paint to be formed into a film under vacuum condition, especially the paint with lower heat conductivity coefficient, so as to reduce or avoid the heat in the valve body being conducted to the surface of the temperature control valve, and interfering or influencing the accurate reflection of the temperature bulb on the environmental temperature. The melting point of the non-metal plating material is lower than that of the plastic surface layer (the plastic surface layer of the temperature control valve is prevented from being heated, melted and deformed), so that atoms and molecules of the non-metal plating material escape from the surface of the plating material by thermal motion, fly to the plastic surface layer of the temperature control valve and are adsorbed and nucleated, and a compact thin film layer with uniform thickness is gradually formed;
specifically, during vacuum coating, the coating chamber is required to be in a vacuum state, and the coating chamber is internally provided with a vacuum chamberPressure not higher than 10-2Pa, heating a coating material such as paint under a vacuum condition, wherein paint atoms and molecules which are heated and evaporated fly to the surface layer of the temperature control valve and are attached to the surface layer to form a layer of film gradually, and the film is finally formed into an equal-thickness non-metal coating layer with extremely high uniformity under the action of force among the molecular atoms due to Brownian motion among the molecules or atoms, wherein the thickness of the non-metal coating layer is 100-200 nm; the specific vacuum coating comprises the following three steps:
(1) pumping the vacuum degree in the coating chamber to be not higher than 10-2Pa, heating a non-metal coating material such as paint to form a thin film under a vacuum condition, wherein the non-metal coating material is gradually evaporated after being heated, and a large number of atoms and molecules are gasified or subjected to liquid-gas phase change to escape from the surface of the liquid or solid coating material and simultaneously perform Brownian motion to diffuse in a coating chamber;
(2) gaseous atoms and molecules are dispersed in vacuum, and the atomic molecules close to and colliding with the surface layer of the temperature control valve are adsorbed on the surface layer of the temperature control valve, so that the concentration gradients of the atoms and the molecules in the space between the nonmetal plating material and the temperature control valve are sequentially reduced, and the atoms and the molecules continuously fly to the temperature control valve;
(3) and the atoms and molecules of the non-metal coating material are migrated to the temperature control valve through few collisions and are gathered by using the temperature control valve as a matrix, and the atoms and molecules of the non-metal coating material are deposited and grown on the surface layer of the temperature control valve to finally form an extremely high-uniformity constant-thickness non-metal coating layer.
S6, spraying finish paint, and spraying a layer of finish paint on the surface plated with the vacuum coating;
and S7, baking the finish paint, accelerating the curing rate of the finish paint, forming a smooth and flat surface, and finishing the process.
The steps of spraying the finish paint by the S6 and baking the finish paint by the S7 are consistent with the processes of spraying the primer paint by the S3 and baking the primer paint by the S4, are not explained, and only form a layer of finish paint on the vacuum coating layer to protect the vacuum coating so as to prevent the non-metal coating layer which is easy to scratch, easy to pollute and not wear-resistant from being damaged in the using process.
After the temperature control valve manufactured by adopting the surface layer vacuum coating process of the temperature control valve passes through water at the temperature of 30 ℃, the temperature change of a valve body thermal bulb of the temperature control valve caused by the temperature change of the water does not exceed 1 ℃, and the EN215 standard is met. The temperature control valve manufactured by the invention not only keeps the excellent performance of the existing metal coating, but also ensures the accurate reflection of the temperature bulb on the indoor environment temperature.
The temperature control valve after vacuum coating completed in this embodiment is subjected to a water temperature influence test to detect whether the temperature control valve after vacuum coating can reach the EN215 standard, that is, after the temperature control valve passes through water at 30 ℃, the temperature change of the water causes the temperature change of a temperature bulb of the temperature control valve not to exceed 1.5 ℃.
The following water temperature impact test was performed with reference to the EN215 standard performance curve as shown in fig. 1.
Firstly screwing a valve head of a temperature control valve on a test scale mark, reducing the air temperature to a closing temperature, namely minus 6 ℃, then increasing the air temperature until the water flow is 0.9-1.2 times of the nominal flow, and balancing at the water temperature of 50 ℃; measuring the water flow rate Q at this time1And the water flow rate Q1The values correspond to an EN215 performance curve;
then, the water temperature is raised to a temperature not lower than 70 ℃ and the temperature is balanced, during which the air temperature is maintained not to be lowered but can be raised by 0.2 ℃, and the water flow rate Q at that time is measured2(not less than 0.1Qmn) corresponds to the EN215 performance curve;
the calculation formula of the water temperature influence coefficient K is as follows:wherein, t1Flow rate Q when water temperature is low1The corresponding sensor temperature; t is t2Indicating the flow Q at a higher water temperature2The corresponding sensor temperature; Δ tLRepresents the temperature rise value of the air; Δ tWIndicating the temperature rise value of the water temperature.
The results of the prior art electroplated chromium layer according to the test method are as follows:
the results of the vacuum plating of this example were as follows:
| product name | Nominal diameter/mm | Product type | Nominal flow/QM·N | As a result: temperature difference of water/. degree.C |
| Temperature control valve | DN15 | 90° | 0.1944m3/h | 0.8901 |
From the above comparative test results, it can be seen that in the prior art, the chromium layer electroplated on the temperature control head is 1.59 ℃, while the vacuum plating temperature in this embodiment is 0.98 ℃; according to the EN215 standard 6.4.1.12, the influence caused by the temperature change of the water at 30 ℃ passing through the valve cannot exceed the standard of 1.5 ℃, so that the electroplated chromium layer in the prior art is obviously not in accordance with the standard, and the vacuum coating process of the invention is completely in accordance with the EN215 standard.
The vacuum coating process on the surface layer of the temperature control valve keeps the excellent performance of the existing metal chromium coating, and also meets the specification of EN215 standard 6.4.1.12, namely the test function of the temperature control valve is not influenced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A surface layer vacuum coating process of a temperature control valve is characterized by comprising the following steps: the temperature control valve is provided with a plastic surface layer, the plastic surface layer is made of high-temperature-resistant plastic materials, and a plating material of a film to be formed is a non-metal plating material with a lower heat conductivity coefficient;
the vacuum coating comprises: heating and evaporating the non-metal coating material under a vacuum condition to enable atoms and molecules of the non-metal coating material to escape from the surface of the non-metal coating material by thermal motion, fly to the plastic surface layer of the temperature control valve and be adsorbed for nucleation, and gradually forming a compact uniform-thickness non-metal coating layer;
wherein the melting point of the non-metal plating material is lower than that of the plastic surface layer; the thickness of the finally formed non-metal coating layer is 100-200 nm.
2. The vacuum coating process for the surface layer of the temperature control valve according to claim 1, wherein the vacuum coating process comprises the following steps: the vacuum coating specifically comprises the following three steps:
(1) pumping the vacuum degree in a coating chamber to be not higher than 10 < -2 > Pa, heating the non-metal coating material under the vacuum condition, gradually evaporating the non-metal coating material after the non-metal coating material is heated, and enabling a large number of atoms and molecules to be gasified or subjected to liquid-gas phase change to escape from the surface of the non-metal coating material and to be diffused in the coating chamber by Brownian motion;
(2) the concentration gradients of atoms and molecules in the space between the nonmetal plating material and the temperature control valve are reduced in sequence;
(3) and the atoms and molecules continuously migrate to the surface of the temperature control valve, are gathered by taking the temperature control valve as a matrix, and are deposited and grown on the surface layer of the temperature control valve to finally form a non-metal coating layer with uniform thickness.
3. The vacuum coating process for the surface layer of the temperature control valve according to claim 1 or 2, wherein: the method is characterized in that a priming paint spraying step is further included before vacuum coating, wherein the priming paint spraying step is that atomized priming paint is uniformly sprayed on the plastic surface layer of the temperature control valve by an atomizing nozzle in a normal-temperature environment and a no-wind environment at 20 ℃, so that a smooth and flat surface is formed, and a coating substrate with extremely high flatness is provided for subsequent vacuum coating.
4. The vacuum coating process for the surface layer of the temperature control valve according to any one of claims 1 to 3, wherein: and after the vacuum coating, a finish spraying step is further included, wherein the finish spraying refers to spraying a finish on the finally formed nonmetal coating layer, and the process of the finish spraying is the same as that of the primer spraying.
5. The vacuum coating process for the surface layer of the temperature control valve according to claim 3, wherein the vacuum coating process comprises the following steps: the method comprises the steps of spraying a primer, spraying a finish paint, and spraying a finishing paint, wherein the spraying temperature is 60-80 ℃, and the baking time is 2-3 hours.
6. The vacuum coating process for the surface layer of the temperature control valve according to claim 1, wherein the vacuum coating process comprises the following steps: the plastic surface layer can resist the high temperature of 150-260 ℃, the heat conductivity coefficient of the non-metal plating material is close to that of air, and the non-metal plating material is paint.
7. The vacuum coating process for the surface layer of the temperature control valve according to claim 1, wherein the vacuum coating process comprises the following steps: before the primer spraying, surface cleaning and static elimination treatment are also included;
the surface cleaning is to clean the surface layer of the temperature control valve until the surface layer has no impurities;
and the static elimination is to perform anti-static treatment on the surface layer of the temperature control valve to eliminate static.
8. The vacuum coating process for the surface layer of the temperature control valve as claimed in claim 7, wherein: cleaning the surface, namely flushing and cleaning by using cleaned water, wherein the pH value of the cleaned water is 6.5-7.5, and the concentration of chloride ions in the water is 25 ppm; when in washing, the axis of the temperature control valve is vertical to the water flow direction and rotates at a constant speed around the axis, so that all surfaces are fully contacted with the water flow section, the speed of the water flow is within 6.0-7.0 m/s, and the washing time is within 3.0-5.0 s; and after the flushing is finished, air drying is carried out by adopting compressed air, the flow velocity of the air flow is within 15-20 m/s, and the air drying time of the temperature control valve is not less than 5 min.
9. The vacuum coating process for the surface layer of the temperature control valve according to claim 7 or 8, wherein the vacuum coating process comprises the following steps: the static elimination, humidifying the environment by a humidifier, increases the relative humidity to 65%.
10. The vacuum coating process for the surface layer of the temperature control valve according to any one of claims 1 to 9, wherein: after the temperature control valve with the non-metal coating layer passes through water with the temperature of 30 ℃ of the valve, the temperature change of the water causes the temperature change of a thermal bulb in the temperature control valve to be not more than 1 ℃.
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| CN201911065185.3A CN110629167A (en) | 2019-11-08 | 2019-11-08 | Surface layer vacuum coating process for temperature control valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112410736A (en) * | 2020-11-03 | 2021-02-26 | 深圳市金源康实业有限公司 | Physical vapor deposition method |
| CN115261799A (en) * | 2022-08-03 | 2022-11-01 | 江西艾芬达暖通科技股份有限公司 | Surface layer vacuum coating process for temperature control valve |
-
2019
- 2019-11-08 CN CN201911065185.3A patent/CN110629167A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112410736A (en) * | 2020-11-03 | 2021-02-26 | 深圳市金源康实业有限公司 | Physical vapor deposition method |
| CN115261799A (en) * | 2022-08-03 | 2022-11-01 | 江西艾芬达暖通科技股份有限公司 | Surface layer vacuum coating process for temperature control valve |
| CN115261799B (en) * | 2022-08-03 | 2023-12-01 | 江西艾芬达暖通科技股份有限公司 | Surface layer vacuum coating process of temperature control valve |
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Application publication date: 20191231 |