CN110835776B - Oil-free coating process applied to oil screen of integrated stove - Google Patents
Oil-free coating process applied to oil screen of integrated stove Download PDFInfo
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- CN110835776B CN110835776B CN201911104086.1A CN201911104086A CN110835776B CN 110835776 B CN110835776 B CN 110835776B CN 201911104086 A CN201911104086 A CN 201911104086A CN 110835776 B CN110835776 B CN 110835776B
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/12—Electrophoretic coating characterised by the process characterised by the article coated
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/20—Pretreatment
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/22—Servicing or operating apparatus or multistep processes
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Abstract
The invention discloses an oil-free coating process applied to an oil screen of an integrated cooker, which comprises the following steps: a. degreasing treatment; b. spraying pure water; c. performing cathode electrophoretic coating; d. performing ultrafiltration circulating water washing; e. and putting the frame body with the oil screen into a drying system for drying. The oil screen storage device can intensively store oil screens, the oil screens are kept in an inclined state to abut against each other during degreasing treatment, the phenomenon of stacking up and down is avoided, the oil screens are completely exposed in a degreasing agent for degreasing treatment, the degreasing effect is improved, simultaneously, generated dirt can fall to the bottom of a degreasing groove along the oil screens kept in the inclined state, the phenomenon of foaming on the surfaces of the oil screens due to dirt deposition on the surfaces of the oil screens is avoided, the oil screen placing plate can reciprocate left and right in the degreasing groove through the deformation effect of a spring, dirt attached to the inner walls of through holes of the oil screens can be washed off under the effect of the degreasing agent, and the phenomenon of foaming on the inner walls of the through holes of the oil screens due to dirt deposition on the inner walls of the through holes of the oil screens is avoided.
Description
Technical Field
The invention belongs to the technical field of integrated cookers, and particularly relates to an oil-free coating process applied to an oil screen of an integrated cooker.
Background
The integrated cooker is a kitchen appliance integrating multiple functions of a range hood, a gas cooker, a disinfection cabinet, a storage cabinet and the like, has the advantages of space saving, good oil fume extraction effect, energy saving, low consumption, environmental protection and the like, and is characterized in that the integrated cooker applies the micro-aerodynamic principle, adopts the principle that deep well downward discharge or side suction downward discharge is adopted, downward air discharge generates a fluid negative pressure area, so that oil fume is absorbed downwards in a magic manner, the phenomenon of oil fume rising everywhere can not be seen, and the oil fume absorption rate reaches more than 95%. The integrated kitchen range is an internationally leading kitchen appliance product developed for solving the problem that the traditional range hood cannot completely eliminate oil smoke and improving the kitchen and home environment, and the product organically combines a range hood, a kitchen range, a disinfection cabinet, a storage cabinet and the like together and thoroughly eliminates the oil smoke in the kitchen.
In the prior art, parts of an integrated cooker are coated by adopting an electrophoresis process, Chinese patent application No. 2015.12.28 discloses an invention named as an electrophoresis process (application No. CN201511005728.4) for surface treatment of an oil-sticking-resistant smoke exhaust ventilator impeller, which comprises the following steps: a. loading the workpiece; b. pre-degreasing; c. ultrasonic degreasing; d. spraying clear water; e. ultrasonic cleaning; f. spraying pure water for the first time; g. spraying pure water for the second time; h. performing cathode electrophoretic coating; m, UF 1; n, UF 2; o, drying; p, lower piece. The range hood impeller manufactured according to the process not only achieves a good oil-free effect, but also solves the problems of long production period, high production cost, high later maintenance cost and great environmental pollution in the processing process. The oil screen of the integrated stove is coated by an electrophoresis process, and is required to be subjected to early degreasing treatment before the electrophoretic coating of the cathode of the oil screen, but the oil screen is thin and is inconvenient to grab in a degreasing tank, and if the oil screen is placed in a frame body, dirt is still very easy to adhere to the outer surface of the oil screen, so that the foaming phenomenon is easy to occur after the oil screen is coated.
Disclosure of Invention
The invention aims to solve the defects in the prior art, provides an oil-free coating process applied to an oil screen of an integrated cooker, can intensively store the oil screen, is convenient for lifting the oil screen, can take out the oil screen with thinner thickness, can keep the oil screens in an inclined state to abut against each other during degreasing treatment, does not generate the phenomenon of stacking up and down, completely exposes the oil screen in degreasing agent for degreasing treatment, improves the degreasing effect, simultaneously can drop the generated dirt to the bottom of a degreasing groove along the oil screen in the inclined state, avoids the phenomenon of foaming on the surface of the oil screen caused by the dirt deposition on the surface of the oil screen, and enables the spring to do left-right reciprocating motion through the deformation effect of the spring, further enables an oil screen placing plate to do left-right reciprocating motion in the degreasing groove, can drop the dirt attached to the inner wall of a through hole of the oil screen under the action of the degreasing agent, the phenomenon that the inner walls of the through holes of the oil screen are foamed due to dirt deposited on the inner walls of the through holes of the oil screen is avoided.
In order to solve the technical problems, the invention adopts the following technical scheme:
the oil-free coating process applied to the oil screen of the integrated stove is characterized by comprising the following steps of:
a. degreasing treatment:
(1) a degreasing agent comprising an alkaline substance, a surfactant and a complex capable of softening hard water is placed in a degreasing tank. It can perform the functions of wetting, dispersing, emulsifying and the like on oil stains, thereby achieving the purpose of removing oil.
(2) The movable plate is moved on the track in a directional mode, when the movable plate is arranged above the degreasing tank, the movable plate is stopped to move on the track, the first hydraulic device on the mounting support is started, the lifting plate fixedly connected to the bottom of the first hydraulic device moves downwards for a set distance, and then the vertical distance of the area between the lifting plate and the degreasing tank is measured. Then according to the vertical distance, the inclination angle of the oil screen placing plate is adjusted on the support frame, the limiting end of the oil screen placing plate is adjusted to be arranged downwards, the oil screens are placed in the grooves of the oil screen placing plate one by one, and the oil screen at the lowest position is limited at the limiting end. Through the inclination of placing the board at the adjustment oil net on the carriage for oil net homoenergetic submergence in the degreasing agent of the recess of board is placed to the oil net, and the oil net supports each other under the effect of self gravity moreover and leaves in the recess that the board was placed to the oil net, is convenient for place the concentration of oil net.
(3) And controlling the first hydraulic device to return to the initial position, fixedly connecting the fixed plate and the lifting plate of the support frame through bolts, and controlling the movable plate to move directionally on the track again so as to enable the oil net placing plate provided with the oil net to be positioned right above the degreasing tank.
(4) And stopping moving the movable plate on the track, starting the first hydraulic device again to enable the lifting plate fixedly connected with the bottom of the first hydraulic device to move downwards for a set distance, immersing the oil screen in a degreasing agent in a degreasing tank at the moment, and carrying out degreasing treatment, wherein the degreasing temperature is controlled to be 35-45 ℃, the time is 8-9 min, the free alkalinity is controlled to be 25-32 Pt, and the PH value is 8-10. The oil screen can be kept in an inclined state and exposed in the degreasing agent, the contact area between the oil screen and the degreasing agent is increased, the degreasing effect is improved, and the generated dirt can fall to the bottom of the degreasing tank along the oil screen kept in the inclined state, so that the phenomenon of foaming on the surface of the oil screen due to the dirt deposited on the surface of the oil screen is avoided.
(5) Opening a second hydraulic device, enabling a limiting block fixedly connected with the bottom of the second hydraulic device to downwards extend into the area of the mounting support and the movable plate, meanwhile, the limiting block abuts against the mounting support, then, the movable plate is directionally moved on the track, at the moment, the mounting support moves on the movable plate, a spring fixed between the mounting support and the movable plate is elongated, then, the movable plate stops moving on the track, and then, the second hydraulic device is controlled to return to the initial position. Through the deformation effect to the spring for reciprocating motion about the spring is done, and then make the oil net place board reciprocating motion about in the degreasing bath, can be with attached to the dirt of the through-hole inner wall department of oil net the dropping under the degreasing agent effect, avoid the through-hole inner wall department deposit dirt of oil net and lead to the through-hole inner wall department of oil net the foaming phenomenon to appear.
(6) The outer end of the oil screen on the outermost side in the groove of the oil screen placing plate is abutted, the U-shaped block is completely clamped into all the oil screens in the groove of the oil screen placing plate, then the U-shaped block is applied with force in the oblique upward direction, all the oil screens in the groove of the oil screen placing plate are taken out, and the oil screens are arranged in the groove of the U-shaped block at the moment. Because the alkaline degreaser of oil net residual that takes out, consequently need take out the oil net in the recess that the board was placed from the oil net with U type piece is unified, and through piling up from top to bottom to the U type piece, be convenient for place the oil net in order temporarily.
b. Pure water spraying: firstly, the frame body is arranged below the clamp, then the clamp is adopted to vertically superpose the U-shaped block for clamping, then the push plate is adopted to uniformly push the oil screen in the U-shaped block to the frame body, then the frame body is placed in the first water washing tank, pure water spraying is carried out, the spraying time is 2-3 min, the PH is controlled to be 6-7, after the pure water spraying is finished, the frame body is taken out, the residual degreasing agent of the oil screen is removed, the effect of removing the degreasing agent is improved, the spraying frequency of the pure water can be increased, and meanwhile, fresh pure water is supplemented in the first water washing tank.
c. Cathode electrophoretic coating: and (2) placing the frame body with the oil net into a cathode electrophoresis tank for dip coating at normal temperature, wherein the time of cathode electrophoresis coating is 3min, the temperature is 26-34 ℃, the voltage is 100-280V, the conductivity of the bath solution is 800-1600 mu s/cm, the solid content of the bath solution is 10-18, the pH value is 5.3-5.9, the conductivity of the anolyte is 800-2200 mu s/cm, the pH of the anolyte is 2-3, and taking out the frame body after the cathode electrophoresis coating is finished. The cathode electrophoretic coating has low pollution and high safety, and can simultaneously increase the effective utilization rate of the coating to more than 90 percent.
d. And (3) ultrafiltration circulating water washing: and (3) placing the frame body provided with the oil screen into a second water washing tank for ultrafiltration circulating water washing, wherein the ultrafiltration circulating water washing time is controlled to be 2min, the conductivity is less than or equal to 300 mu s/cm, the solid content of the tank liquor is less than or equal to 1%, and the PH is 5.5-6, and taking out the frame body after the ultrafiltration circulating water washing is finished. The ultrafiltration circulating water washing can improve the utilization rate of the coating, reduce the production cost and reduce the discharge of waste water.
e. And putting the frame body with the oil screen into a drying system for drying.
Further, in step a, the specific step of adjusting the inclination angle of the oil screen placing plate on the support frame is to rotate the rotating arm on the support frame firstly, adjust the rotating arm to a horizontal state, then place the oil screen plate on the rotating arm to rotate, place the oil screen plate to a vertical state, then place the oil screen plate on the rotating arm by adopting a first nut and fix the oil screen plate on the rotating shaft of the rotating arm, then rotate the rotating arm on the support frame to the lower part of the support frame, after the adjustment is completed, adopt a second nut, fix the rotating arm on the rotating shaft of the support frame. Adjust the rotor arm to the horizontality earlier, place the board with the oil net and adjust to vertical state again, through the rotation of rotor arm, realize that the oil net places the adjustment of the inclination of board, can avoid the oil net that bilateral symmetry set up to place the board and bump the phenomenon simultaneously.
Further, in the step a, in order to enable the lifting plate to be lifted stably, at least four guide rods are welded on the top surface of the lifting plate, and the guide rods penetrate out of the mounting bracket.
Further, in step a, the degreasing tank is designed into a trapezoid shape, after degreasing treatment is finished, a liquid outlet of the degreasing tank is opened, the inner wall of the degreasing tank is cleaned by spraying clear water through the spray head, meanwhile, the inner wall of the degreasing tank slides in a reciprocating mode through the inclined plate, residues on the inner wall of the degreasing tank are scraped, the degreasing tank is kept clean, and the coating quality of the oil screen is improved.
Furthermore, in the step c, an auxiliary tank is arranged on one side of the cathode electrophoresis tank, after the cathode electrophoresis coating is finished, the cathode electrophoresis tank is filtered, and filtered impurity particles and oil stains are discharged into the auxiliary tank, so that the accumulation of the impurity particles and the oil stains in the cathode electrophoresis tank can be reduced, and the coating quality of an oil screen is improved.
Furthermore, in the step d, after the frame body is taken out, a liquid outlet at the bottom of the second washing tank is opened, and tank liquid is recovered, so that the utilization rate of the coating is improved, the production cost is reduced, and the discharge of waste water is reduced.
Further, in the step e, a low-temperature area, a high-temperature area and a low-temperature area are sequentially arranged in the sequence of discharging the drying system from the oil net to the discharging system, the temperature of each area is independently controlled and is uniform, when the drying system is used for drying, the oil net firstly enters the low-temperature area, the temperature is controlled to be 100-120 ℃, the moisture is dried in advance, and the water marks generated after the oil net is coated are reduced. And then entering a high-temperature area, controlling the temperature to be 160-220 ℃, and curing the paint film. And then entering a low-temperature area, controlling the temperature to be 80-100 ℃, and clamping the oil screen after the oil screen is cooled when the oil screen exits from the drying system. The drying temperature is independently controlled in the three areas, so that the phenomena of water marks and foaming on the surface of the oil screen can be avoided, and the coating film can be well leveled to obtain a smooth surface.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. the degreasing agent which is composed of alkaline substances, a surfactant and a complex capable of softening hard water is placed in the degreasing tank, and can perform the functions of infiltration, dispersion, emulsification and the like on oil stains, so that the aim of degreasing is fulfilled.
2. According to the invention, the lifting plate moves downwards for a set distance under the driving action of the first hydraulic device, then the vertical distance of the area between the lifting plate and the degreasing tank is measured, then the inclination angle of the oil screen placing plate is adjusted on the support frame according to the vertical distance, the limiting end of the oil screen placing plate is adjusted downwards, the oil screens are placed in the grooves of the oil screen placing plate one by one, and the oil screen positioned at the lowest part is limited at the limiting end. Through the inclination that the board was placed to the adjustment oil net on the carriage for oil net homoenergetic submergence in the recess of board is placed to the oil net is in the degreasing agent, and the oil net supports each other under the effect of self gravity moreover and leaves in the recess that the board was placed to the oil net, is convenient for place the concentration of oil net, has solved the submergence of the oil net that thickness is thinner in the degreasing bath and has taken out.
3. According to the degreasing method, during degreasing, the oil nets are kept in an inclined state to abut against each other, the phenomenon of stacking up and down is avoided, the oil nets are completely exposed in the degreasing agent for degreasing, the degreasing effect is improved, simultaneously, generated dirt can fall to the bottom of the degreasing tank along the oil nets kept in the inclined state, and the phenomenon of foaming on the surfaces of the oil nets due to dirt deposition on the surfaces of the oil nets is avoided.
4. The limiting block is abutted against the mounting bracket, the moving plate moves on the rail in a directional manner, the mounting bracket moves on the moving plate at the moment, the spring fixed between the mounting bracket and the moving plate is stretched and can deform, when the spring is not limited by the limiting block, the spring reciprocates left and right, the oil screen placing plate further reciprocates left and right in the degreasing tank, dirt attached to the inner wall of the through hole of the oil screen can be dropped under the action of the degreasing agent, and the phenomenon that the inner wall of the through hole of the oil screen is foamed due to the fact that the dirt is deposited on the inner wall of the through hole of the oil screen is avoided.
5. The oil screen is uniformly taken out from the groove of the oil screen placing plate by the U-shaped block, when the oil screen is arranged in the groove of the U-shaped block, the oil screen is conveniently and orderly placed temporarily by stacking the U-shaped block up and down, and the oil screen in the U-shaped block can be uniformly pushed into the frame body by a push plate subsequently, so that the oil screen is prevented from being damaged and lost.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural view of the present invention when a moving plate is disposed above a degreasing bath;
FIG. 2 is a schematic structural view of the present invention when the inclination angle of the oil net placing plate is adjusted;
FIG. 3 is a schematic structural view of an oil screen placement plate according to the present invention;
FIG. 4 is a schematic structural view of the present invention when the oil net placing plate is disposed right above the degreasing tank;
FIG. 5 is a schematic view of the structure of the present invention during degreasing;
FIG. 6 is a schematic structural view of the present invention with the stop block abutting against the mounting bracket;
FIG. 7 is a schematic structural diagram of the present invention when the U-shaped block is completely clamped into all the oil screens in the oil screen placing plate groove;
fig. 8 is a schematic structural view of an oil screen in the present invention.
In the figure, 1-degreasing bath; 2, moving a board; 3-a track; 4, mounting a bracket; 5-a first hydraulic device; 6-lifting plate; 7-a support frame; 8-oil screen placing plate; 9-a limiting end; 10-oil screen; 11-a groove; 12-a fixing plate; 13-a swivel arm; 14-a second hydraulic device; 15-a limiting block; 16-a spring; 17-U-shaped blocks; 18-guide bar.
Detailed Description
As shown in fig. 1 to 8, the oil-free coating process applied to the oil screen of the integrated cooker of the present invention comprises the following steps:
a. degreasing treatment:
(1) a degreasing agent comprising an alkaline substance, a surfactant and a complex capable of softening hard water is placed in the degreasing tank 1. It can perform the functions of wetting, dispersing, emulsifying and the like on oil stains, thereby achieving the purpose of removing oil.
(2) The moving plate 2 is moved on the track 3 in a directional mode, when the moving plate 2 is arranged above the degreasing tank 1, the moving plate 2 is stopped moving on the track 3, the first hydraulic device 5 on the mounting support 4 is started, the lifting plate 6 fixedly connected to the bottom of the first hydraulic device 5 moves downwards for a set distance, and then the vertical distance of the area between the lifting plate 6 and the degreasing tank 1 is measured. Then according to this vertical distance, adjust the inclination that oil net placed board 8 on support frame 7 to spacing end 9 that will adjust oil net and place board 8 sets up downwards, places oil net 10 in oil net places the recess 11 of board 8 one by one, and oil net 10 that is in the below is spacing at spacing end 9 department. Through the inclination of placing board 8 on support frame 7 adjustment oil net for oil net 10 homoenergetic submergence in the recess 11 of board 8 is placed to the oil net is in the degreasing agent, and oil net 10 supports each other under the effect of self gravity moreover and leaves in the recess 11 of board 8 is placed to the oil net, is convenient for place the concentration of oil net 10.
The specific steps of adjusting the inclination angle of the oil net placing plate 8 on the support frame 7 are as follows: firstly, the rotating arm 13 rotates on the support frame 7, the rotating arm 13 is adjusted to be in a horizontal state, then the oil screen placing plate 8 rotates on the rotating arm 13, the oil screen placing plate 8 is adjusted to be in a vertical state, then the oil screen placing plate 8 is fixed on a rotating shaft of the rotating arm 13 through a first nut, then the rotating arm 13 rotates on the support frame 7 to the position below the support frame 7, and after adjustment is completed, the rotating arm 13 is fixed on the rotating shaft of the support frame 7 through a second nut. Adjust the rotor arm 13 to the horizontality earlier, place the board with the oil net and adjust to vertical state again, through the rotation of rotor arm 13, realize that the oil net places the adjustment of the inclination of board, can avoid the oil net that bilateral symmetry set up to place the board and bump the phenomenon simultaneously.
(3) And controlling the first hydraulic device 5 to return to the initial position, fixedly connecting the fixed plate 12 and the lifting plate 6 of the support frame 7 through bolts, and controlling the moving plate 2 to move directionally on the track 3 again, so that the oil screen placing plate 8 provided with the oil screen 10 is positioned right above the degreasing tank 1.
(4) And stopping moving the moving plate 2 on the track 3, starting the first hydraulic device 5 again to enable the lifting plate 6 fixedly connected with the bottom of the first hydraulic device 5 to move downwards for a set distance, immersing the oil screen 10 in the degreasing agent in the degreasing tank 1 at the moment, and carrying out degreasing treatment, wherein the degreasing temperature is controlled to be 35-45 ℃, the time is 8-9 min, the free alkalinity is controlled to be 25-32 Pt, and the PH value is 8-10. The oil screen 10 can be exposed in the degreasing agent in an inclined state, the contact area between the oil screen 10 and the degreasing agent is increased, the degreasing effect is improved, and the generated dirt can fall to the bottom of the degreasing tank 1 along the oil screen 10 in the inclined state, so that the phenomenon that the surface of the oil screen 10 is foamed due to the dirt deposited on the surface of the oil screen 10 is avoided.
(5) The second hydraulic device 14 is opened, so that a limiting block 15 fixedly connected to the bottom of the second hydraulic device 14 extends downwards into the area of the mounting bracket 4 and the moving plate 2, meanwhile, the limiting block 15 abuts against the mounting bracket 4, the moving plate 2 is moved on the track 3 in a directional manner, at this time, the mounting bracket 4 moves on the moving plate 2, and a spring 16 fixed between the mounting bracket 4 and the moving plate 2 is extended. Then, the moving plate 2 stops moving on the track 3, the second hydraulic device 14 is controlled to return to the initial position, at the moment, under the action of the deformation of the spring 16, the mounting bracket 4 reciprocates left and right on the moving plate 2, so that the oil net placing plate 8 reciprocates left and right in the degreasing tank 1, impurities deposited on the oil net 10 are removed, and when the oil net placing plate 8 is in a static state in the degreasing tank 1, the first hydraulic device 5 is controlled to return to the initial position in time, so that the oil net 10 leaves the degreasing tank 1. Through the deformation effect to spring 16 for spring 16 is left right reciprocating motion, and then makes oil net place board 8 left right reciprocating motion in degreasing bath 1, can drop the dirt of the through-hole inner wall department attached to oil net 10 under the degreasing agent effect, avoids oil net 10's through-hole inner wall department deposit dirt and leads to oil net 10's through-hole inner wall department the foaming phenomenon to appear.
(6) The outer ends of the oil screens 10 on the outermost side in the grooves 11 of the oil screen placing plate 8 are abutted, the U-shaped blocks 17 are completely clamped on all the oil screens 10 in the grooves 11 of the oil screen placing plate 8, then the U-shaped blocks 17 are obliquely and upwardly applied with force, all the oil screens 10 in the grooves 11 of the oil screen placing plate 8 are taken out, and at the moment, the oil screens 10 are arranged in the grooves 11 of the U-shaped blocks 17. Because the oil screen 10 that takes out remains the basic degreaser, consequently need put the recess 11 of board 8 with U type piece 17 with oil screen 10 with unified taking out from the oil screen, and through piling up the upper and lower of U type piece 17, be convenient for temporarily place oil screen 10 in order.
The invention carries out optimization design on a specific structure: in order to ensure that the lifting plate 6 can be lifted stably, at least four guide rods 18 are welded on the top surface of the lifting plate 6, and the guide rods 18 penetrate out of the mounting bracket 4. The degreasing tank 1 is designed into a trapezoidal shape, after degreasing treatment is finished, a liquid outlet of the degreasing tank 1 is opened, a spray head is adopted to spray clear water to clean the inner wall of the degreasing tank 1, meanwhile, an inclined plate is adopted to slide the inner wall of the degreasing tank 1 in a reciprocating mode, residues on the inner wall of the degreasing tank 1 are scraped, the cleanness of the degreasing tank 1 is kept, and the coating quality of the oil screen 10 is improved.
b. Pure water spraying: firstly, the framework is arranged below the fixture, then the fixture is adopted to clamp the U-shaped block 17 in an up-and-down superposition manner, then the push plate is adopted to uniformly push the oil screen 10 in the U-shaped block 17 into the framework, then the framework is placed in the first water washing tank, pure water spraying is carried out, the spraying time is 2-3 min, the PH is controlled to be 6-7, after the pure water spraying is finished, the framework is taken out, the residual degreasing agent of the oil screen 10 is removed, in order to improve the effect of removing the degreasing agent, the frequency of spraying the pure water can be increased, and meanwhile, fresh pure water is supplemented into the first water washing tank.
c. Cathode electrophoretic coating: and (3) placing the frame body with the oil screen 10 into a cathode electrophoresis tank for dip coating at normal temperature, wherein the time of cathode electrophoresis coating is 3min, the temperature is 26-34 ℃, the voltage is 100-280V, the conductivity of the bath solution is 800-1600 mu s/cm, the solid content of the bath solution is 10-18, the pH value is 5.3-5.9, the conductivity of the anolyte is 800-2200 mu s/cm, the pH of the anolyte is 2-3, and taking out the frame body after the cathode electrophoresis coating is finished. The cathode electrophoretic coating has low pollution and high safety, and can simultaneously increase the effective utilization rate of the coating to more than 90 percent.
One side of the cathode electrophoresis tank is provided with an auxiliary tank, after cathode electrophoresis coating is finished, the cathode electrophoresis tank is filtered, filtered impurity particles and oil stains are discharged into the auxiliary tank, accumulation of the impurity particles and the oil stains in the cathode electrophoresis tank can be reduced, and the coating quality of the oil screen 10 is improved.
d. And (3) ultrafiltration circulating water washing: and (3) placing the frame body provided with the oil screen 10 into a second water washing tank for ultrafiltration circulating water washing, wherein the ultrafiltration circulating water washing time is controlled to be 2min, the conductivity is less than or equal to 300 mu s/cm, the solid content of the tank liquor is less than or equal to 1%, and the PH is 5.5-6, and taking out the frame body after the ultrafiltration circulating water washing is finished. The ultrafiltration circulating water washing can improve the utilization rate of the coating, reduce the production cost and reduce the discharge of waste water. The flow of the pump is selected according to the amount of the circulating water liquid in the second rinsing bath, and the horizontal centrifugal pump is adopted in the invention.
After the frame body is taken out, the liquid outlet at the bottom of the second washing tank is opened, and the tank liquid is recovered, so that the utilization rate of the coating is improved, the production cost is reduced, and the discharge of waste water is reduced.
e. And putting the frame body provided with the oil screen 10 into a drying system for drying.
The drying system is provided with a low-temperature area, a high-temperature area and a low-temperature area in sequence from the discharging to the discharging of the oil screen 10, the temperature of each area is independently controlled and uniform, during drying, the oil screen 10 firstly enters the low-temperature area, the temperature is controlled to be 100-120 ℃, moisture is dried in advance, and water stains appearing after the oil screen 10 is coated are reduced. And then entering a high-temperature area, controlling the temperature to be 160-220 ℃, and curing the paint film. And then entering a low-temperature area, controlling the temperature to be 80-100 ℃, and clamping the oil screen 10 after the oil screen 10 is cooled when exiting the drying system. The drying temperature is independently controlled in the three areas, so that the phenomena of water marks and foaming on the surface of the oil screen 10 can be avoided, and the coating film can be well leveled to obtain a smooth surface.
The invention can intensively store the oil screen 10, is convenient for lifting the oil screen 10, can take out the oil screen 10 with thinner thickness, and during degreasing treatment, the oil nets 10 are kept in an inclined state to abut against each other, the phenomenon of stacking up and down is avoided, the oil nets 10 are completely exposed in the degreasing agent for degreasing treatment, the degreasing effect is improved, meanwhile, the generated dirt can fall to the bottom of the degreasing tank 1 along the oil screen 10 which keeps an inclined state, so that the phenomenon that the surface of the oil screen 10 is foamed due to the dirt deposited on the surface of the oil screen 10 is avoided, and the spring 16 reciprocates left and right under the deformation action of the spring 16, and then make oil net place board 8 reciprocating motion about in degreasing bath 1, can be with the dirt that adheres to in the through-hole inner wall department of oil net 10 dropping under the degreasing agent effect, avoid oil net 10's through-hole inner wall department deposit dirt and lead to oil net 10's through-hole inner wall department to appear the foaming phenomenon.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.
Claims (6)
1. The oil-free coating process applied to the oil screen of the integrated stove is characterized by comprising the following steps of:
a. degreasing treatment:
(1) placing a degreasing agent consisting of an alkaline substance, a surfactant and a complex capable of softening hard water in a degreasing tank;
(2) the moving plate is directionally moved on the track, when the moving plate is arranged above the degreasing tank, the moving plate is stopped to move on the track, a first hydraulic device on a mounting bracket is started, a lifting plate fixedly connected with the bottom of the first hydraulic device moves downwards for a set distance, then the vertical distance of an area between the lifting plate and the degreasing tank is measured, then the inclination angle of an oil screen placing plate is adjusted on a support frame according to the vertical distance, the specific steps are that a rotating arm is rotated on the support frame firstly, the rotating arm is adjusted to be in a horizontal state, then the oil screen placing plate is rotated on the rotating arm, the oil screen placing plate is adjusted to be in a vertical state, then the oil screen placing plate is fixed on a rotating shaft of the rotating arm by adopting a first nut, the rotating arm is rotated towards the lower part of the support frame on the support frame, and after the adjustment is finished, a second nut is adopted to fix the rotating arm on the rotating shaft of the support frame, the limiting end of the oil screen placing plate is adjusted to be arranged downwards, the oil screens are placed in the grooves of the oil screen placing plate one by one, and the oil screen at the lowest position is limited at the limiting end;
(3) controlling the first hydraulic device to return to the initial position, fixedly connecting the fixed plate and the lifting plate of the support frame through bolts, and controlling the movable plate to move directionally on the track again to enable the oil net placing plate provided with the oil net to be positioned right above the degreasing tank;
(4) stopping moving the moving plate on the track, starting the first hydraulic device again to enable the lifting plate fixedly connected with the bottom of the first hydraulic device to move downwards for a set distance, immersing the oil screen in a degreasing agent in a degreasing tank at the moment, and carrying out degreasing treatment, wherein the degreasing temperature is controlled to be 35-45 ℃, the time is 8-9 min, the free alkalinity is controlled to be 25-32 Pt, and the pH value is 8-10;
(5) opening a second hydraulic device, enabling a limiting block fixedly connected with the bottom of the second hydraulic device to extend downwards into the area of the mounting support and the movable plate, enabling the limiting block to abut against the mounting support, moving the movable plate on the track in a directional manner, moving the mounting support on the movable plate at the moment, lengthening a spring fixed between the mounting support and the movable plate, stopping the movable plate from moving on the track, controlling the second hydraulic device to return to an initial position, enabling the mounting support to reciprocate leftwards and rightwards on the movable plate under the action of deformation of the spring to enable the oil net placing plate to reciprocate leftwards and rightwards in the degreasing groove, removing impurities deposited on the oil net, and timely controlling the first hydraulic device to return to the initial position when the oil net placing plate is in a static state in the degreasing groove to enable the oil net to leave the degreasing groove;
(6) abutting against the outer end of the oil screen on the outermost side in the groove of the oil screen placing plate, completely clamping the U-shaped block on all oil screens in the groove of the oil screen placing plate, applying force to the U-shaped block in an inclined upward direction, taking out all oil screens in the groove of the oil screen placing plate, and arranging the oil screens in the groove of the U-shaped block;
b. pure water spraying: firstly, arranging a frame body below a clamp, then, vertically superposing and clamping a U-shaped block by using the clamp, then, uniformly pushing an oil net in the U-shaped block into the frame body by using a push plate, then, placing the frame body in a first water washing tank, spraying pure water for 2-3 min, controlling the pH value to be 6-7, and taking out the frame body after the pure water spraying is finished;
c. cathode electrophoretic coating: at normal temperature, placing the frame body with the oil net in a cathode electrophoresis tank for dip coating, wherein the time of cathode electrophoresis coating is 3min, the temperature is 26-34 ℃, the voltage is 100-280V, the conductivity of bath solution is 800-1600 mu s/cm, the solid content of the bath solution is 10-18, the pH value is 5.3-5.9, the conductivity of anolyte is 800-2200 mu s/cm, the pH of the anolyte is 2-3, and after the cathode electrophoresis coating is finished, taking out the frame body;
d. and (3) ultrafiltration circulating water washing: placing the frame body provided with the oil screen into a second water washing tank for ultrafiltration circulating water washing, wherein the ultrafiltration circulating water washing time is controlled to be 2min, the conductivity is less than or equal to 300 mu s/cm, the solid content of the tank liquor is less than or equal to 1%, the pH value is 5.5-6, and taking out the frame body after the ultrafiltration circulating water washing is finished;
e. and putting the frame body with the oil screen into a drying system for drying.
2. The oil-free coating process applied to the integrated cooking oil screen as claimed in claim 1, wherein: in the step a, in order to ensure that the lifting plate can be lifted stably, at least four guide rods are welded on the top surface of the lifting plate, and the guide rods penetrate out of the mounting bracket.
3. The oil-free coating process applied to the integrated cooking oil screen as claimed in claim 1, wherein: in the step a, the degreasing tank is designed into a trapezoid shape, after the degreasing treatment is finished, a liquid outlet of the degreasing tank is opened, then the spray head is adopted to spray clear water to clean the inner wall of the degreasing tank, and meanwhile the inclined plate is adopted to slide the inner wall of the degreasing tank in a reciprocating mode to scrape the residues on the inner wall of the degreasing tank.
4. The oil-free coating process applied to the integrated cooking oil screen as claimed in claim 1, wherein: in the step c, an auxiliary tank is arranged on one side of the cathode electrophoresis tank, after the cathode electrophoresis coating is finished, the cathode electrophoresis tank is filtered, and the filtered impurity particles and the oil stains are discharged into the auxiliary tank.
5. The oil-free coating process applied to the integrated cooking oil screen as claimed in claim 1, wherein: in step d, after the frame is taken out, the drain port at the bottom of the second washing tank is opened to recover the tank liquid.
6. The oil-free coating process applied to the integrated cooking oil screen as claimed in claim 1, wherein: and e, arranging a low-temperature area, a high-temperature area and a low-temperature area in sequence from the discharging of the drying system from the oil screen to the discharging, wherein the temperature of each area is independently controlled and uniform, when drying, the oil screen firstly enters the low-temperature area, the temperature is controlled to be 100-120 ℃, the moisture is dried in advance, then the oil screen enters the high-temperature area, the temperature is controlled to be 160-220 ℃, a paint film is solidified, then the oil screen enters the low-temperature area, the temperature is controlled to be 80-100 ℃, and when the oil screen exits the drying system and is cooled, the oil screen is clamped.
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| CN201911104086.1A CN110835776B (en) | 2019-11-13 | 2019-11-13 | Oil-free coating process applied to oil screen of integrated stove |
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| CN201911104086.1A CN110835776B (en) | 2019-11-13 | 2019-11-13 | Oil-free coating process applied to oil screen of integrated stove |
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| CN110835776B true CN110835776B (en) | 2021-12-14 |
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| CN116694187A (en) * | 2023-06-26 | 2023-09-05 | 杭州老板电器股份有限公司 | Corrosion-resistant molding powder and application thereof, corrosion-resistant oil net and preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE4325631C2 (en) * | 1993-07-30 | 1996-03-28 | Joergens Klaus | Device for the electrophoretic coating of the inner surface of hollow bodies |
| JPH09195074A (en) * | 1996-01-10 | 1997-07-29 | Daido Steel Co Ltd | Pickling method and pickling device |
| CN204779843U (en) * | 2015-06-07 | 2015-11-18 | 南京维泰新材料科技有限公司 | Degrease equipment suitable for batch metal pipe fittings |
| CN105543938B (en) * | 2015-12-28 | 2017-10-03 | 宁波艾谱风机有限公司 | A kind of anti-lampblack absorber impeller surface processing electrophoresis process for being stained with oil |
| CN108220982B (en) * | 2018-01-16 | 2020-10-30 | 嘉兴市金鹭喷织有限公司 | High-efficient degreasing device of machine part |
| CN108486637B (en) * | 2018-04-18 | 2020-06-30 | 嘉兴市丽彩佳五金有限公司 | Electrophoretic painting treatment process for metal woven mesh |
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Address after: No.138 Pudong Avenue, Pukou Economic Development Zone, Shengzhou City, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Senge intelligent Kitchen Appliance Co.,Ltd. Address before: No.138 Pudong Avenue, Pukou Economic Development Zone, Shengzhou City, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG SENG ELECTRICAL Co.,Ltd. |
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