CN113210232A - Impeller surface treatment method and dip-coating device - Google Patents
Impeller surface treatment method and dip-coating device Download PDFInfo
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- CN113210232A CN113210232A CN202110499396.9A CN202110499396A CN113210232A CN 113210232 A CN113210232 A CN 113210232A CN 202110499396 A CN202110499396 A CN 202110499396A CN 113210232 A CN113210232 A CN 113210232A
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- impeller
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- 238000003618 dip coating Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000004381 surface treatment Methods 0.000 title claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 69
- 238000000576 coating method Methods 0.000 claims abstract description 69
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 55
- 239000010703 silicon Substances 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 238000004140 cleaning Methods 0.000 claims abstract description 32
- 239000013527 degreasing agent Substances 0.000 claims description 40
- 238000005237 degreasing agent Methods 0.000 claims description 39
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 38
- 229910000077 silane Inorganic materials 0.000 claims description 38
- 238000011282 treatment Methods 0.000 claims description 38
- 239000004447 silicone coating Substances 0.000 claims description 37
- 238000005260 corrosion Methods 0.000 claims description 36
- 230000007797 corrosion Effects 0.000 claims description 36
- 238000001035 drying Methods 0.000 claims description 27
- 238000005406 washing Methods 0.000 claims description 25
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- 238000005507 spraying Methods 0.000 claims description 22
- 238000005238 degreasing Methods 0.000 claims description 19
- 230000001681 protective effect Effects 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 14
- 239000008399 tap water Substances 0.000 claims description 13
- 235000020679 tap water Nutrition 0.000 claims description 13
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 9
- 239000004593 Epoxy Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 239000004519 grease Substances 0.000 claims description 6
- 229920001225 polyester resin Polymers 0.000 claims description 6
- 239000004645 polyester resin Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 5
- 238000007747 plating Methods 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 5
- 238000007598 dipping method Methods 0.000 claims description 3
- 230000003628 erosive effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 19
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000004026 adhesive bonding Methods 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 235000019504 cigarettes Nutrition 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 14
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 239000000243 solution Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 7
- 239000003973 paint Substances 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000011538 cleaning material Substances 0.000 description 4
- 239000000499 gel Substances 0.000 description 4
- DCAYPVUWAIABOU-UHFFFAOYSA-N hexadecane Chemical compound CCCCCCCCCCCCCCCC DCAYPVUWAIABOU-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000283070 Equus zebra Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
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- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- -1 copper and nickel Chemical class 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000013003 hot bending Methods 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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Images
Classifications
-
- 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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C13/00—Means for manipulating or holding work, e.g. for separate articles
- B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
- B05C3/09—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles
- B05C3/10—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles the articles being moved through the liquid or other fluent material
-
- 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
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
-
- 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
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- 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
-
- 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
- B05D3/0209—Multistage baking
-
- 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
-
- 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
-
- 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
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/53—Base coat plus clear coat type
- B05D7/534—Base coat plus clear coat type the first layer being let to dry at least partially before applying the second layer
-
- 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
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/53—Base coat plus clear coat type
- B05D7/536—Base coat plus clear coat type each layer being cured, at least partially, separately
Abstract
The invention relates to the technical field of kitchen appliances, in particular to a method for treating the surface of an impeller and a dip-coating device. The impeller surface treatment method provided by the invention comprises the following steps: cleaning the surface of the impeller; and (3) immersing the cleaned impeller into the organic silicon coating to form an organic silicon coating on the surface of the impeller. The impeller surface that has the organosilicon coating has water contact angle more than or equal to 110, oily contact angle more than or equal to 80, have good hydrophobicity and oleophobic nature, can prevent effectively that the surface from gluing, the impeller is adnexed greasy dirt on the surface and slides away easily, and the accumulational condition of greasy dirt can not appear in long-term use, has improved the life of part, and it is lower to have avoided piling up the efficiency of the oil absorption cigarette that causes because of the greasy dirt, has greatly promoted user experience and has felt.
Description
Technical Field
The invention relates to the technical field of kitchen appliances, in particular to a method for treating the surface of an impeller and a dip-coating device.
Background
The range hood, as a kitchen appliance with high kitchen use frequency, generally comprises an oil screen, a fume collecting hood, a volute, an impeller, a motor and the like, wherein the impeller is driven to rotate by the motor, negative pressure is generated in the fume collecting hood, and then the fume is sucked. In the process of long-term use of the impeller, increasingly thick oil stains can be accumulated on the surface of the impeller, and meanwhile, the impeller is positioned in the volute, so that the cleaning difficulty is high.
In the prior art, in order to prevent the surface of the impeller from being stained with oil, the process of performing surface treatment on the impeller of the range hood is generally to use an electrophoretic coating to improve the oil stain resistance of the impeller, and the process flow is generally as follows: degreasing, cleaning, cathode electrophoretic coating and drying, wherein immersion ultrafiltration circulating water cleaning is needed after electrophoretic coating, the steps are complicated, and experimental data show that the water contact angle of the surface of the impeller after electrophoretic treatment is less than 90 degrees, the oil contact angle is about 50 degrees, the non-stick performance is not ideal, and the problem of oil stain accumulation still exists.
Because the oil dirt is deposited thickly more, the efficiency of inhaling oil smoke also is lower and lower, still can cause the impeller unbalance simultaneously, produces vibration noise easily, has greatly influenced user's experience and has felt.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the surface of the impeller is easy to be stained with oil and is difficult to clean.
(II) technical scheme
In order to solve the technical problem, an embodiment of an aspect of the present invention provides a method for processing a surface of an impeller, including the following steps:
cleaning the surface of the impeller;
and (3) immersing the cleaned impeller into the organic silicon coating to form an organic silicon coating on the surface of the impeller.
According to one embodiment of the present invention, the step of immersing the cleaned impeller in a silicone coating further comprises: the impeller was spin dip coated within the silicone coating.
According to one embodiment of the invention, the silicone coating comprises the following components in percentage by weight:
15-20% of epoxy modified organic silicon resin, 10-15% of polyester resin, 10-15% of silicon dioxide gel and 50-65% of n-butyl acetate.
According to one embodiment of the present invention, the step of immersing the cleaned impeller in a silicone coating further comprises, after forming the silicone coating on the surface of the impeller: curing the silicone coating.
According to one embodiment of the invention, curing the silicone coating comprises the steps of:
surface drying: placing the impeller in an environment with the temperature of 80-100 ℃ for 5-8 minutes, and drying the organic silicon coating on the surface of the impeller to form an organic silicon coating;
and (3) curing: the impeller is placed in an environment with the temperature of 180 ℃ and 200 ℃ for 8-10 minutes to cure the organic silicon coating.
According to one embodiment of the invention, the step of cleaning the surface of the impeller further comprises: and carrying out first corrosion-resistant treatment on the surface of the impeller blank to form the impeller.
According to one embodiment of the invention, the first corrosion-resistant treatment of the surface of the impeller blank comprises the following steps: and plating a metal layer on the surface of the impeller blank.
According to an embodiment of the present invention, after cleaning the surface of the impeller, the step of cleaning the surface of the impeller further comprises: and carrying out secondary corrosion-resistant treatment on the surface of the impeller.
According to one embodiment of the invention, the second erosion resistant treatment comprising the impeller surface comprises:
the surface of the impeller was treated with a silane treating agent to form a silane protective film on the surface of the impeller.
According to one embodiment of the present invention, the step of treating the surface of the impeller with a silane treating agent having a density of 13 to 26Kg/m in forming a silane protective film on the surface of the impeller3The pH value of the silane treating agent is 4-4.5.
According to an embodiment of the invention, after the step of performing the second corrosion-resistant treatment on the surface of the impeller, the method further comprises the following steps: and drying the silane protective film.
According to one embodiment of the present invention, after the step of spin dip coating the impeller within the silicone coating, further comprises:
and after the impeller which is subjected to dip coating is moved out of the organic silicon coating, the impeller continuously keeps rotating.
According to one embodiment of the invention, cleaning the surface of the impeller comprises the steps of:
spraying cleaning fluid on the surface of the impeller;
removing grease on the surface of the sprayed impeller;
and washing the surface of the degreased impeller by water.
According to one embodiment of the present invention, the step of spraying a cleaning solution on the surface of the impeller comprises:
spraying on the surface of the impeller: spraying water with temperature of 40-60 deg.C and pressure of 0.08-0.15MPa on the surface of the impeller for 4-6 min.
According to one embodiment of the invention, the step of degreasing the surface of the sprayed impeller comprises:
ultrasonic pre-degreasing: after the surface of the impeller is sprayed, the impeller is immersed into a degreasing agent with the temperature of 35-40 ℃, the free alkalinity of 20-25pt and the pH value of 11-13 for 4-6 minutes, and ultrasonic waves with the frequency of 18kHz-25kHz are emitted into the degreasing agent;
degreasing: immersing the impeller pre-degreased by ultrasonic waves into a degreasing agent with the temperature of 35-40 ℃, the free alkalinity of 20-25pt and the pH value of 11-13 for 2-4 minutes, and further degreasing the surface of the impeller.
According to one embodiment of the present invention, the step of water washing the surface of the degreased impeller comprises:
washing with tap water: immersing the degreased impeller into tap water with the pH value of 8-9 and the temperature of 45-50 ℃ to clean the surface of the impeller for 1-2 minutes and remove the residual degreasing agent on the surface of the impeller;
pure water washing: immersing the impeller washed by the tap water into pure water with the pH value of 7-8 and the conductivity of 8-10us/cm for washing for 1-2 minutes, and further removing the residual degreasing agent on the surface of the impeller;
pure water spray washing: after being washed by pure water, the surface of the impeller is sprayed for 1 to 2 minutes by adopting the pure water with the pH value of 7 to 8 and the conductivity of 8 to 10 us/cm.
Another embodiment of the present invention provides a dip coating apparatus for dip coating a silicone coating in the step of dipping a cleaned impeller into the silicone coating, including: the device comprises a dip coating tank, a first guide rail, a second guide rail, a mounting wheel and a driving wheel;
the second guide rail is arranged in the dip-coating tank, the first guide rail is positioned above the second guide rail, the driving wheel is meshed with the first guide rail, and the mounting wheel is meshed with the second guide rail;
the impeller is installed at the both ends of installation wheel, the drive wheel drives installation wheel is in dip-coating inslot rolls.
The invention has the beneficial effects that: the invention provides a method for treating the surface of an impeller, which comprises the following steps: cleaning the surface of the impeller; and (3) immersing the cleaned impeller into the organic silicon coating to form an organic silicon coating on the surface of the impeller. The impeller is handled through above-mentioned step, one deck organosilicon coating has been formed on the surface of impeller, it surveys through the experiment, the water contact angle that has the impeller surface of organosilicon coating more than or equal to 110, oil contact angle more than or equal to 80, have good hydrophobicity and oleophobic nature, the attached greasy dirt slips away easily on the impeller surface, can prevent effectively that the surface from gluing, the accumulational condition of greasy dirt can not appear in long-term use, the life of part has been improved, the efficiency of having avoided piling up the oil absorption cigarette of the impeller that causes because of the greasy dirt is lower, user experience sense has greatly been promoted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow diagram of an impeller surface treatment provided in accordance with one embodiment of the present invention;
FIG. 2 is a flow chart of impeller surface treatment, coating curing provided by an embodiment of the present invention;
FIG. 3 is a flow chart of a first corrosion-resistant treatment, surface treatment and coating curing process for an impeller according to an embodiment of the present invention;
FIG. 4 is a flow chart of a first corrosion-resistant treatment, a surface treatment, a coating curing, and a second corrosion-resistant treatment of an impeller according to an embodiment of the present invention;
FIG. 5 is a flow chart of impeller surface cleaning provided by one embodiment of the present invention;
FIG. 6 is a flow chart of an embodiment of the present invention providing impeller surface cleaning;
FIG. 7 is a flow chart of a process for dip coating silicone on the surface of an impeller according to one embodiment of the present invention;
FIG. 8 is a front view of a dip coating apparatus provided in accordance with one embodiment of the present invention;
FIG. 9 is a schematic view of the first connecting shaft, the mounting wheel, the first sliding bearing and the second sliding bearing according to one embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a dip coating apparatus provided in accordance with one embodiment of the present invention;
FIG. 11 is a schematic structural diagram of a dip coating apparatus according to another embodiment of the present invention;
FIG. 12 is a schematic structural view of a second connecting rod according to an embodiment of the present invention;
FIG. 13 is a structural view of a third connecting rod according to an embodiment of the present invention;
FIG. 14 is a flow chart of a dip coating silicone coating provided in accordance with an embodiment of the present invention.
Icon: 1-driving wheels;
2-mounting wheels; 21-a first connecting shaft; 211-a first sliding bearing; 212-a second slide bearing;
3-a first guide rail;
4-a second guide rail; 41-a first rack; 42-a second rack; 43-a third rack; 44-a fourth rack; 45-fifth rack;
5-dip coating tank; 51-a first side wall; 52-a second side wall; 53-bottom wall;
6-impeller;
71-first connecting rod; 72-a second connecting rod; 721-a first connecting ring; 73-a third connecting rod; 731-second connecting ring.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and detailed description, and the embodiments and features of the embodiments of the present application may be combined with each other without conflict. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, one embodiment of the present invention provides a method for treating the surface of an impeller, comprising the steps of:
cleaning the surface of the impeller;
and (3) immersing the cleaned impeller into the organic silicon coating to form an organic silicon coating on the surface of the impeller.
In this embodiment, before the impeller is dip-coated with the organic silicon coating, impurities, grease, and the like attached to the surface of the impeller need to be removed to ensure the cleanliness of the organic silicon coating and improve the adhesion of the organic silicon coating.
In this embodiment, through the experiment survey, the water contact angle that is attached with the impeller surface of organosilicon coating is more than or equal to 110, and oily contact angle is more than or equal to 80, and the organosilicon coating has good oleophobic and easy cleanability, and the impeller that is attached with the organosilicon coating, the greasy dirt slides away easily, can prevent effectively that the surface from gluing, consequently, the accumulational condition of greasy dirt can not appear in long-term use, improves the life of impeller, convenient clean.
In this embodiment, the step of immersing the cleaned impeller in the silicone coating further includes: an impeller rotates within the silicone coating. The impeller rotates in the organic silicon coating, so that the organic silicon coating can be attached to the surface of the impeller to form an organic silicon coating on the surface of the impeller.
The organosilicon coating comprises the following components in percentage by weight:
15-20% of epoxy modified organic silicon resin, 10-15% of polyester resin, 10-15% of silicon dioxide gel and 50-65% of n-butyl acetate.
In the embodiment, the epoxy modified organic silicon resin has excellent high and low temperature resistance, hydrophobic and moisture-proof performance and good electrical insulation performance, and the organic silicon coating containing the epoxy modified organic silicon resin is dip-coated on the surface of the impeller, so that the impeller has good hydrophobicity, oleophobic property and corrosion resistance, is convenient to clean and has long service life.
Preferably, in this embodiment, the silicone coating comprises the following components in percentage by weight: 18% of epoxy modified organic silicon resin, 13% of polyester resin, 13% of silica gel and 56% of n-butyl acetate.
As shown in fig. 2, the step of immersing the cleaned impeller into the silicone coating, after forming the silicone coating on the surface of the impeller, further comprises: curing the silicone coating.
In this example, the silicone coating was made stronger by curing the silicone coating. Coating curing includes a number of methods:
placing the impeller attached with the organic silicon coating at an air convection position, and curing in a natural drying mode;
curing the impeller attached with the organic silicon coating in a drying mode;
preferably, in this embodiment, the impeller is dried and cured.
The silicone coating curing comprises the steps of:
surface drying: placing the impeller in an environment with the temperature of 80-100 ℃ for 5-8 minutes, and drying the organic silicon coating on the surface of the impeller to form an organic silicon coating;
and (3) curing: the impeller is placed in an environment with the temperature of 180 ℃ and 200 ℃ for 8-10 minutes to cure the organic silicon coating.
In the embodiment, the impeller is arranged in a drying box, wherein the surface drying and the curing can be carried out in the same drying box, after the surface drying is finished, the temperature of the drying box is raised, and then the organic silicon coating is cured; the surface drying and the curing can be carried out in two or more drying boxes, after the surface drying is finished, the impeller attached with the organic silicon coating is moved to another drying box, the temperature of the drying box is set, and the impeller is cured.
As shown in fig. 3, before the step of cleaning the surface of the impeller, the method further comprises: and carrying out first corrosion-resistant treatment on the surface of the impeller blank to form the impeller.
In this embodiment, in order to improve the corrosion resistance of the impeller, a corrosion-resistant treatment needs to be performed on the impeller blank, wherein the corrosion resistance of the impeller can be improved by plating a corrosion-resistant protective film, including a metal protective film and a non-metal protective film, on the surface of the impeller blank, and the corrosion resistance of the impeller can also be improved by adopting a form of a corrosion-resistant metal or alloy, such as stainless steel coated steel.
The first corrosion-resistant treatment of the surface of the impeller blank comprises the following steps: and plating a metal layer on the surface of the impeller blank.
In this embodiment, the corrosion resistance of the impeller is improved by plating the impeller blank with a metal layer.
Preferably, in the embodiment, the surface of the impeller is galvanized to improve the corrosion resistance of the impeller.
It is understood that, in this embodiment, the impeller may also be made of cold-rolled steel plate, or plated with other metals such as copper and nickel, which can also achieve the purpose of improving the corrosion resistance of the impeller in this embodiment.
As shown in fig. 4, after the step of cleaning the surface of the impeller, the method further comprises: and carrying out secondary corrosion-resistant treatment on the surface of the impeller.
In this example, the surface of the impeller was subjected to a second corrosion-resistant treatment to further improve the corrosion resistance of the impeller and to improve the surface adhesion of the impeller, and an organosilicon coating was formed by dip-coating an organosilicon coating.
The step of performing a second corrosion resistant treatment on the surface of the impeller comprises:
the surface of the impeller was treated with a silane treating agent to form a silane protective film on the surface of the impeller.
In the embodiment, the surface of the impeller is subjected to corrosion resistance treatment by adopting a silane treating agent, and the density of the silane treating agent is 13-26Kg/m3The pH value of the silane treating agent is 4-4.5, wherein the treating method can be dip coating, and the impeller is immersed into the silane treating agent for 2.5-3.5 minutes, so that the surface of the impeller is uniformly stained with the silane treating agent to form a silane protective film; the silane treatment agent can be uniformly sprayed on the surface of the impeller by adopting a spraying mode to form a silane protective film.
In the embodiment, a spraying mode is selected, the silane treatment agent is uniformly sprayed to the surface of the impeller, and the silane treatment agent is sprayed to the surface of the impeller for 2.5-3.5 minutes to form a silane protective film, so that the corrosion resistance of the impeller is improved.
In this embodiment, preferably, after the surface of the impeller is treated with the silane treatment agent, the silane protective film is dried, and the impeller is placed in an environment at a temperature of 80 ℃ for 20 to 30 minutes to dry the silane treatment agent on the surface of the impeller to form the silane protective film.
It can be understood that the silane treating agent can be used to treat the surface of the impeller instead of phosphating, and the surface of the impeller is contacted with phosphating solution to generate a stable insoluble inorganic compound film on the metal surface, which can also achieve the purpose of improving the corrosion resistance of the impeller.
The step of dip-coating the impeller with the organic silicon coating further comprises the following steps:
the dip coated impeller was removed from the silicone coating and continued to rotate.
In this embodiment, the impeller is immersed in the organic silicon coating, and dip-coating is performed by rotation so that the organic silicon coating is uniformly attached to the surface of the impeller, and then the impeller is moved out of the organic silicon coating and continuously rotated so as to prevent the organic silicon coating from flowing on the surface of the impeller due to the action of gravity, so that the organic silicon coating on the surface of the impeller is more uniform.
As shown in fig. 5, cleaning the impeller surface comprises the steps of:
spraying cleaning fluid on the surface of the impeller;
removing grease on the surface of the sprayed impeller;
and washing the surface of the degreased impeller by water.
In the embodiment, cleaning fluid is sprayed on the surface of the impeller to remove impurities on the surface of the impeller, so that the degreasing agent is prevented from being polluted in the degreasing process, surface grease is removed by using the degreasing agent, and finally, the residual degreasing agent on the surface of the impeller is cleaned, so that the surface of the impeller is kept clean, and the impeller is prevented from being affected by dip-coating of organic silicon coating.
As shown in fig. 6, in this embodiment, specifically, the step of cleaning the surface of the impeller includes the following steps:
spraying and water washing: spraying water with the temperature of 40-60 ℃ and the pressure of 0.08-0.15MPa on the surface of the impeller for 4-6 minutes to flush impurities on the surface of the impeller, and simultaneously ensuring the cleanliness of a degreasing agent to prepare for surface degreasing;
ultrasonic pre-degreasing: after the surface of the impeller is sprayed, the impeller is immersed into the degreasing agent with the temperature of 35-40 ℃, the free alkalinity of 20-25pt and the pH value of 11-13 for 4-6 minutes, and ultrasonic waves with the frequency of 18kHz-25kHz are emitted into the degreasing agent. Ultrasonic waves are emitted into the degreasing agent to mix and circulate the degreasing agent, so that the degreasing agent can be promoted in the pre-degreasing process;
degreasing: immersing the impeller subjected to ultrasonic pre-degreasing in a degreasing agent with the temperature of 35-40 ℃, the free alkalinity of 20-25pt and the pH value of 11-13 for 2-4 minutes, and further degreasing the surface of the impeller for further removing grease on the surface of the impeller;
washing with tap water: immersing the degreased impeller into tap water with the pH value of 8-9 and the temperature of 45-50 ℃ to clean the surface of the impeller for 1-2 minutes, and using the degreaser remained on the surface of the impeller to clean;
pure water washing: and (3) immersing the impeller washed by the tap water into pure water with the pH value of 7-8 and the conductivity of 8-10us/cm for washing for 1-2 minutes, and further removing the residual degreasing agent on the surface of the impeller.
Referring to fig. 7, according to the above embodiment, the present application proposes the following specific embodiment of the impeller surface treatment method:
example one
Selecting a galvanized plate to manufacture an impeller;
spraying and water washing: spraying water with the temperature of 50 ℃ and the pressure of 0.12MPa on the surface of the impeller for 5 minutes;
ultrasonic pre-degreasing: immersing the impeller in a degreasing agent (the degreasing agent is 3% aqueous solution of the degreasing agent with the concentration and the model of AS-209, and the degreasing agent is produced by Olympic surface cleaning materials Limited of Ningbo city) with the temperature of 37 ℃, the free alkalinity of 23pt and the pH value of 12 for 5 minutes, and simultaneously emitting ultrasonic waves with the frequency of 22kHz into the degreasing agent;
degreasing: immersing the impeller in a degreasing agent (the degreasing agent is 3% aqueous solution of the degreasing agent with concentration and type AS-209, and the degreasing agent is produced by Olympic surface cleaning materials Limited of Ningbo city) with the temperature of 37 ℃, the free alkalinity of 23pt and the pH value of 12 for 3 minutes;
washing with tap water: immersing the impeller into tap water with the pH value of 8 and the temperature of 47 ℃ to clean the surface of the impeller for 1 minute;
pure water washing: immersing the impeller into pure water with the pH value of 7 and the conductivity of 9us/cm for cleaning for 1 minute;
pure water spray washing: spraying pure water with the pH value of 7 and the conductivity of 9us/cm on the surface of the impeller for 1 minute;
silane treatment: by usingThe density is 15Kg/m3A silane treatment agent with a pH value of 4 (the silane treatment agent is a silane treatment agent with a model of Psi-52, which is produced by Germany Hangao company) sprays the surface of the impeller for 2.5 minutes;
drying: drying the impeller for 20 minutes in an environment with the temperature of 80 ℃;
dip coating: the impeller rotates in the organic silicon coating (the weight percentage of each component of the organic silicon coating is 18 percent of epoxy modified organic silicon resin, 13 percent of polyester resin, 13 percent of silicon dioxide gel and 56 percent of n-butyl acetate) at a constant speed of 20r/min for 5 s;
the impeller is moved out of the organic silicon coating and continuously rotates at a constant speed of 20r/min for 3 s;
and (3) curing: drying the impeller for 8 minutes in an environment with the temperature of 80 ℃;
the impeller was cured for 10 minutes at 180 ℃.
Example two
Selecting a galvanized plate to manufacture an impeller;
spraying and water washing: spraying water with the temperature of 50 ℃ and the pressure of 0.12MPa on the surface of the impeller for 5 minutes;
ultrasonic pre-degreasing: immersing the impeller in a degreasing agent (the degreasing agent is 3% aqueous solution of the degreasing agent with the concentration and the model of AS-209, and the degreasing agent is produced by Olympic surface cleaning materials Limited of Ningbo city) with the temperature of 37 ℃, the free alkalinity of 23pt and the pH value of 12 for 5 minutes, and simultaneously emitting ultrasonic waves with the frequency of 22kHz into the degreasing agent;
degreasing: immersing the impeller in a degreasing agent (the degreasing agent is 3% aqueous solution of the degreasing agent with concentration and type AS-209, and the degreasing agent is produced by Olympic surface cleaning materials Limited of Ningbo city) with the temperature of 37 ℃, the free alkalinity of 23pt and the pH value of 12 for 3 minutes;
washing with tap water: immersing the impeller into tap water with the pH value of 8 and the temperature of 47 ℃ to clean the surface of the impeller for 1 minute;
pure water washing: immersing the impeller into pure water with the pH value of 7 and the conductivity of 9us/cm for cleaning for 1 minute;
pure water spray washing: spraying pure water with the pH value of 7 and the conductivity of 9us/cm on the surface of the impeller for 1 minute;
silane treatment: the surface of the impeller was subjected to spray treatment for 2.5 minutes with a silane treating agent having a density of 25Kg/m3 and a pH of 5.5 (the silane treating agent was a silane treating agent of type Psi-52, manufactured by Henkel Kogyo, Germany);
drying: drying the impeller in an environment with the temperature of 80 ℃ for 30 minutes;
dip coating: the impeller rotates at a constant speed of 20r/min for 10s in the organic silicon coating (the weight percentage of each component of the organic silicon coating is 18 percent of epoxy modified organic silicon resin, 13 percent of polyester resin, 13 percent of silicon dioxide gel and 56 percent of n-butyl acetate);
the impeller is moved out of the organic silicon coating and continuously rotates at a constant speed of 20r/min for 8 s;
and (3) curing: drying the impeller for 5 minutes in an environment with the temperature of 100 ℃;
the impeller was cured for 8 minutes at 200 ℃.
The performance of the impeller in the first embodiment and the performance of the impeller in the second embodiment are compared with the performance of the comparative impeller after electrophoretic paint treatment, the structure and the material of the comparative impeller are the same as those of the impeller in the first embodiment and the second embodiment, the treatment process is a common treatment process of an electrophoretic paint impeller on the market, the electrophoretic paint of the Nippon AC901S is selected to carry out electrophoretic treatment on the surface of the impeller, and then the impeller after electrophoretic paint treatment is dried so that the surface of the comparative impeller is adhered with the electrophoretic paint of the Nippon AC 901S. The performance of the impellers of examples one and two was compared to a comparative impeller with a libanor AC901S electrocoat attached as follows:
corrosion resistance:
and (3) selecting a sodium chloride solution to test the corrosion resistance of the impeller, wherein the sodium chloride solution is selected to have the concentration of 4-5%, the pH value of 6.5-7.2 and the experimental temperature of 33-37 ℃.
The impeller of the first embodiment, the impeller of the second embodiment and the comparison impeller are respectively suspended in an experiment chamber, a sodium chloride solution with the concentration of 5% and the pH value of 7 is selected, the temperature in the experiment chamber is 35 ℃, the continuous sodium chloride solution spraying experiment is carried out on the impeller of the first embodiment, the impeller of the second embodiment and the comparison impeller, the time of damage to the surface layer of the impeller in the continuous spraying process of sodium chloride solution spraying is tested, and the test results are as follows:
| performance of | Example one | Example two | Contrast impeller |
| Corrosion resistance | Neutral salt spray for 96h | Neutral salt spray for 96h | Neutral salt spray for 48h |
It can be seen that in the continuous sodium chloride solution spraying process of the impellers of the first and second examples, after 96 hours, the corrosion phenomenon appears on the surface of the impeller, while the corrosion phenomenon appears on the surface of the comparative impeller after 48 hours, and the corrosion resistance of the impellers of the first and second examples is better than that of the comparative impeller.
Water contact angle (the contact angle refers to the included angle from the solid-liquid interface to the gas-liquid interface through the liquid interior at the solid-liquid and gas-liquid intersection, the larger the contact angle, the better the surface hydrophobic property):
placing the impeller of the first embodiment, the impeller of the second embodiment and the impeller of the electrophoretic paint on a test bed respectively, ensuring that the angles of the three impellers are the same, dripping 0.04ml of pure water drops to the same positions on the surfaces of the three impellers, wherein the pH value of the pure water is 7, the conductivity is 8-10us/cm, and measuring the contact angle formed by the water drops and the coating by a contact angle measuring instrument after dripping 0.04ml of pure water drops to the surface of the coating, wherein the measurement results are as follows:
| performance of | Example one | Example two | Contrast impeller |
| Water contact angle | 110° | 113° | 80° |
It can be seen that the water contact angles of the impellers of examples one and two were both greater than 90 °, the impeller surface had good hydrophobicity, i.e., was not easily wetted by water, while the water contact angle of the comparative impeller was less than 90 °, the comparative impeller surface had hydrophilicity, i.e., the solution was wetted by water.
Oil contact angle: the impeller of the first embodiment, the impeller of the second embodiment and the impeller of the electrophoretic paint are respectively placed on a test bed, the angles of the three impellers are ensured to be the same, 0.04ml of n-hexadecane liquid drop is dropped to the same position on the surfaces of the three impellers, the contact angle formed by the n-hexadecane liquid drop and the coating is measured by using a contact angle measuring instrument, and the measurement results are as follows:
| performance of | Example one | Example two | Contrast impeller |
| Oil contact angle | 80° | 82° | 50° |
It can be seen that the oil contact angles of the impellers of examples one and two are both greater than the oil contact angle of the comparative impeller, i.e., the impellers of examples one and two have better oil repellency and are less prone to oil wetting than the comparative impeller.
Easy cleanability: the method comprises the steps of simulating oil stain on the surface of the range hood by using Japanese zebra M0-150-MC oily marking pen handwriting, respectively scribing 5 handwriting with the length of 30mm at the same position on the surfaces of three impellers, standing the handwriting for 5 minutes, respectively soaking the surfaces of the three impellers for 1 minute, and wiping the surfaces clean by using water-wetted rags or gauze. The number of times of reciprocating wiping is less than or equal to 5 times, and in this experiment, the number of times of wiping selects to be 5 times, selects to be stained with the water rag and wipes, and the test result is as follows:
| performance of | Example one | Example two | Contrast impeller |
| Easy cleaning property | Easy removal of oily handwriting | Easy removal of oily handwriting | The oily handwriting can not be wiped off |
It can be seen that the surfaces of the impellers of examples one and two are easier to clean than the comparative impeller.
Through the testing method, the impeller which is dip-coated with the organic silicon coating is superior to the impeller which is subjected to electrophoresis in corrosion resistance, hydrophobicity, oleophobicity and easy cleaning.
The embodiment of the present invention provides a dip coating apparatus, which is used for dip coating an organic silicon coating in a third processing step on the surface of the impeller, as shown in fig. 8 to 13, and includes: dip coating groove 5, first guide rail 3, second guide rail 4, installation wheel 2 and drive wheel 1, second guide rail 4 is installed in dip coating groove 5, first guide rail 3 is located second guide rail 4 top, drive wheel 1 with first guide rail 3 meshes, installation wheel 2 with second guide rail 4 meshes, and impeller 6 installs 2 both ends of installation wheel, drive wheel 1 drives installation wheel 2 is in roll in dip coating groove 5.
The dip-coating device that this embodiment provided, be equipped with organosilicon coating in the dip-coating groove 5, second guide rail 4 is installed in the dip-coating groove 5, drive wheel 1 drives installation wheel 2 rotates, can drive simultaneously again installation wheel 2 is followed second guide rail 4 leaves dip-coating groove 5, drive wheel 1 drives installation wheel 2 is in at the uniform velocity of rotation on second guide rail 4, it is preferred, installation wheel 2 is the gear, installation wheel 2 with second guide rail 4 meshes to realize at the uniform velocity of rotation, so that impeller 6 evenly coats and goes up the organosilicon coating, so that impeller 6 obtains oleophobic and easy cleaning performance.
As shown in fig. 8 to 13, the dip-coating device further includes a connecting assembly, one end of the connecting assembly is connected to the driving wheel 1, the other end of the connecting assembly is connected to the mounting wheel 2, and the driving wheel 1 drives the gear to move at a constant speed on the second guide rail 4 through the connecting assembly.
As shown in fig. 9, the dip-coating device further includes a first connecting shaft 21, a through hole is formed in the mounting wheel 2, the mounting wheel 2 is sleeved on the first connecting shaft 21, and the impeller 6 is mounted at two ends of the first connecting shaft 21.
In this embodiment, the mounting wheel 2 is mounted at the axial center of the first connecting shaft 21 to ensure that the impellers 6 are kept balanced when the two ends of the first connecting shaft 21 are hung.
As shown in fig. 8, 12 and 13, the connecting assembly includes a first connecting rod 71, a second connecting rod 72 and a third connecting rod 73, one end of the second connecting rod 72 is connected to the third connecting rod 73, the other end of the second connecting rod is provided with a first connecting ring 721, the first connecting ring 721 is sleeved on one end of the first connecting shaft 21, one end of the third connecting rod 73 far away from the second connecting rod 72 is provided with a second connecting ring 731, the second connecting ring 731 is sleeved on the other end of the first connecting shaft 21, and the first connecting rod 71 is connected to the connection between the second connecting rod 72 and the third connecting rod 73.
In this embodiment, preferably, the second connecting rod 72 and the third connecting rod 73 are connected to form a "U" shaped rod, and two ends of the "U" shaped rod are respectively connected to two ends of the mounting wheel 2 to push or pull the mounting wheel 2 to rotate on the second guide rail 4.
In this embodiment, preferably, the first connection ring 721 is formed by hot bending one end of the second connection rod 72, an open area is formed on the connection ring to facilitate detaching the installation wheel 2, and the second connection ring 731 is disposed in the same manner as the first connection ring 721, which is not described herein again.
It is understood that the first connecting ring 721 or the second connecting ring 731 can also be a sliding bearing and is connected to the second connecting rod 72 or the third connecting rod 73, so as to achieve the purpose that the driving wheel 1 drives the mounting wheel 2 to rotate through the connecting assembly.
As shown in fig. 9, 12 and 13, a first sliding bearing 211 and a second sliding bearing 212 are sleeved on both ends of the first connecting shaft 21, the first connecting ring 721 is sleeved on the first sliding bearing 211, and the second connecting ring 731 is sleeved on the second sliding bearing 212.
In this embodiment, the first sliding bearing 211 and the second sliding bearing 212 are connected to the first connecting ring 721 and the second connecting ring 731 to reduce the friction loss of the first connecting ring 721 and the second connecting ring 731 to the first connecting shaft 21, and at the same time, the first sliding bearing 211 and the second sliding bearing 212 are also used to limit the movement of the impellers 6 at both ends to the direction close to the mounting wheel 2 to affect the dipping result.
As shown in fig. 8, the dip coating tank 5 includes a bottom wall 53, a first side wall 51 and a second side wall 52, the first side wall 51 and the second side wall 52 are both connected to the bottom wall 53, the first side wall 51 and the second side wall 52 are oppositely disposed, in order to facilitate the impeller 6 to be lifted out from the dip coating tank 5, an included angle a between the first side wall 51 and the bottom wall 53 is an obtuse angle, and an included angle between the second side wall and the bottom wall 53 is an obtuse angle.
In this embodiment, the second guide rail 4 may be provided in two ways.
Example one
As shown in fig. 10, the second guide rail 4 includes a first rack 41, a second rack 42, and a third rack 43, one end of the second rack 42 is connected to the first rack 41, and the other end is connected to the third rack 43, the extending direction of the second rack 42 is the same as the extending direction of the bottom wall 53, the extending direction of the first rack 41 is the same as the extending direction of the first side wall 51, and the extending direction of the third rack 43 is the same as the extending direction of the second side wall 52.
In the present embodiment, to facilitate the lifting of the mounting wheel 2 out of the dip-coating tank 5, the second guide rail 4 comprises a second rack 42 parallel to the bottom wall 53, a first rack 41 parallel to the first side wall 51, and a third rack 43 parallel to the second side wall 52. The initial position of the mounting wheel 2 is set at the first rack 41 or the third rack 43, after the driving wheel 1 starts to work, the mounting wheel 2 is driven to move into the dip-coating tank 5 along the extending direction of the second rail 4, the dip-coating of the silicone coating is started, the mounting wheel continues to move along the extending direction of the second rail 4 until the mounting wheel leaves the dip-coating tank 5, and the mounting wheel continues to rotate on the second rail 4 so that the silicone coating is uniformly coated on the surface of the impeller 6.
Example two
The second guide rail 4 includes a fourth rack and a fifth rack 45, the fourth rack is connected to the fifth rack 45, an extending direction of the fourth rack 44 is the same as an extending direction of the bottom wall 53, and an extending direction of the fifth rack 45 is the same as an extending direction of the first side wall 51 or the second side wall 52.
In this embodiment, the fourth rack 44 is arranged in the same manner as the second rack 42 in the first embodiment, and the fifth rack 45 is arranged in the same manner as the first rack 41 or the third rack 43 in the first embodiment, which is not described herein again. The initial position of the mounting wheel 2 is located at one end of the fifth rack 45 far away from the fourth rack 44, the driving wheel 1 drives the mounting wheel 2 to move on the second guide rail 4 along the extending direction of the second guide rail 4, after the dip-coating in the dip-coating tank 5 is completed, the mounting wheel moves in the opposite direction to leave the dip-coating tank 5 when the dip-coating is started, and the mounting wheel continues to move outside the dip-coating tank 5 for a certain time, so that the silicone coating covers the surface of the impeller 6.
As shown in fig. 11, the dip coating device further includes a power device, the power device is connected to the first gear, and the power device drives the driving wheel 1 to move on the first guide rail 3.
It can be understood that, in this embodiment, the power device may be an external motor, and is connected to the drive to drive the driving wheel 1 to rotate, and the power device may also be disposed inside the driving wheel 1 to drive the driving wheel 1 to rotate.
As shown in fig. 8 to 11, the extending direction of the first rail 3 is the same as the extending direction of the second rail 4.
In this embodiment, the installation wheel 2 needs to move at a constant speed in the dip coating tank 5, preferably, the rotation speed of the driving wheel 1 is 20r/min, and in order to ensure that the installation wheel 2 rotates at a constant speed and is always engaged with the second guide rail 4, the extending direction of the first guide rail 3 is the same as the extending direction of the second guide rail 4.
In this embodiment, as shown in fig. 14, the impeller after the treatment is immersed in the dip coating tank 5 filled with the prepared silicone coating, the impeller 6 is hung at two ends of the mounting wheel 2, the power device is started, the driving wheel 1 starts to drive the mounting wheel 2 to move, the impeller is kept rotating at a constant speed after being immersed in the silicone coating, preferably, the rotating speed is 20r/min, the immersion time is preferably 5 to 10s, the driving wheel 1 continues to drive the mounting wheel 2 to move, the impeller leaves the silicone coating, the impeller continues to rotate at a constant speed on the second guide rail 4, preferably, the rotating speed is set to 20r/min, and the rotating time is preferably 3 to 8s, so that the impeller 6 is uniformly coated with the silicone coating, and the impeller 6 has oleophobic property and easy cleanability.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (17)
1. A method for treating the surface of an impeller is characterized by comprising the following steps:
cleaning the surface of the impeller;
and (3) immersing the cleaned impeller into the organic silicon coating to form an organic silicon coating on the surface of the impeller.
2. The impeller surface treatment method according to claim 1, wherein the step of immersing the cleaned impeller in a silicone coating further comprises: the impeller was spin dip coated within the silicone coating.
3. The impeller surface treatment method according to claim 1, wherein the silicone coating comprises the following components in percentage by weight:
15-20% of epoxy modified organic silicon resin, 10-15% of polyester resin, 10-15% of silicon dioxide gel and 50-65% of n-butyl acetate.
4. The impeller surface treatment method according to claim 1, wherein the step of immersing the cleaned impeller in a silicone coating material further comprises, after forming the silicone coating layer on the impeller surface: curing the silicone coating.
5. The impeller surface treatment method according to claim 4, characterized in that curing the silicone coating comprises the steps of:
surface drying: placing the impeller in an environment with the temperature of 80-100 ℃ for 5-8 minutes, and drying the organic silicon coating on the surface of the impeller to form an organic silicon coating;
and (3) curing: the impeller is placed in an environment with the temperature of 180 ℃ and 200 ℃ for 8-10 minutes to cure the organic silicon coating.
6. The impeller surface treatment method according to claim 1, further comprising, before the step of cleaning the impeller surface: and carrying out first corrosion-resistant treatment on the surface of the impeller blank to form the impeller.
7. The impeller surface treatment method according to claim 6, wherein the first corrosion-resistant treatment of the surface of the impeller blank comprises: and plating a metal layer on the surface of the impeller blank.
8. The impeller surface treatment method according to claim 1, further comprising, after the step of cleaning the impeller surface: and carrying out secondary corrosion-resistant treatment on the surface of the impeller.
9. The impeller surface treatment method of claim 8, wherein the step of subjecting the impeller surface to a second erosion resistant treatment comprises:
the surface of the impeller was treated with a silane treating agent to form a silane protective film on the surface of the impeller.
10. The impeller surface treatment method according to claim 9, characterized by the step of treating the impeller surface with a silane treating agent having a density of 13 to 26Kg/m in forming a silane protective film on the impeller surface3The pH value of the silane treating agent is 4-4.5.
11. The impeller surface treatment method according to claim 9, further comprising, after the second erosion resisting treatment of the impeller surface: and drying the silane protective film.
12. The impeller surface treatment method according to claim 2, wherein the step of rotating dip-coating the impeller within the silicone coating further comprises:
and after the impeller which is subjected to dip coating is moved out of the organic silicon coating, the impeller continuously keeps rotating.
13. The impeller surface treatment process according to any one of claims 1 to 12, wherein cleaning the impeller surface comprises the steps of:
spraying cleaning fluid on the surface of the impeller;
removing grease on the surface of the sprayed impeller;
and washing the surface of the degreased impeller by water.
14. The impeller surface treatment process of claim 13 wherein the step of spraying a cleaning fluid over the impeller surface comprises:
spraying water with temperature of 40-60 deg.C and pressure of 0.08-0.15MPa on the surface of the impeller for 4-6 min.
15. The impeller surface treatment process of claim 13, wherein the step of de-greasing the surface of the sprayed impeller comprises:
ultrasonic pre-degreasing: after the surface of the impeller is sprayed, the impeller is immersed into a degreasing agent with the temperature of 35-40 ℃, the free alkalinity of 20-25pt and the pH value of 11-13 for 4-6 minutes, and ultrasonic waves with the frequency of 18kHz-25kHz are emitted into the degreasing agent;
degreasing: immersing the impeller pre-degreased by ultrasonic waves into a degreasing agent with the temperature of 35-40 ℃, the free alkalinity of 20-25pt and the pH value of 11-13 for 2-4 minutes, and further degreasing the surface of the impeller.
16. The impeller surface treatment method according to claim 13, wherein the step of washing the degreased surface of the impeller with water comprises:
washing with tap water: immersing the degreased impeller into tap water with the pH value of 8-9 and the temperature of 45-50 ℃ to clean the surface of the impeller for 1-2 minutes and remove the residual degreasing agent on the surface of the impeller;
pure water washing: immersing the impeller washed by the tap water into pure water with the pH value of 7-8 and the conductivity of 8-10us/cm for washing for 1-2 minutes, and further removing the residual degreasing agent on the surface of the impeller;
pure water spray washing: after being washed by pure water, the surface of the impeller is sprayed for 1 to 2 minutes by adopting the pure water with the pH value of 7 to 8 and the conductivity of 8 to 10 us/cm.
17. A dip coating apparatus for dipping a cleaned impeller into a silicone coating by the steps of any one of claims 1 to 16, comprising: the coating machine comprises a dip coating tank (5), a first guide rail (3), a second guide rail (4), a mounting wheel (2) and a driving wheel (1);
the second guide rail (4) is arranged in the dip coating tank (5), the first guide rail (3) is positioned above the second guide rail (4), the driving wheel (1) is meshed with the first guide rail (3), and the mounting wheel (2) is meshed with the second guide rail (4);
impellers (6) are arranged at two ends of the mounting wheel (2), and the driving wheel (1) drives the mounting wheel (2) to roll in the dip coating tank (5).
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