CN110761044A - Washing machine front panel and spraying process thereof - Google Patents
Washing machine front panel and spraying process thereof Download PDFInfo
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- CN110761044A CN110761044A CN201910891513.9A CN201910891513A CN110761044A CN 110761044 A CN110761044 A CN 110761044A CN 201910891513 A CN201910891513 A CN 201910891513A CN 110761044 A CN110761044 A CN 110761044A
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- wall
- washing
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- 238000005406 washing Methods 0.000 title claims abstract description 164
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005507 spraying Methods 0.000 title claims abstract description 35
- 230000008569 process Effects 0.000 title claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 45
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims description 37
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 238000002791 soaking Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000003750 conditioning effect Effects 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000005238 degreasing Methods 0.000 claims description 7
- 238000005237 degreasing agent Methods 0.000 claims description 7
- 239000013527 degreasing agent Substances 0.000 claims description 7
- 229920000728 polyester Polymers 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- 238000000889 atomisation Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 claims description 4
- 238000005243 fluidization Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920001225 polyester resin Polymers 0.000 claims description 3
- 239000004645 polyester resin Substances 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/12—Casings; Tubs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate 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
- 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
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- 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
- 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
- B05D3/04—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 exposure to gases
- B05D3/0406—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 exposure to gases the gas being air
- B05D3/0426—Cooling with air
-
- 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
- B05D3/10—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 other chemical means
- B05D3/102—Pretreatment of metallic substrates
-
- 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
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/02—Devices for adding soap or other washing agents
-
- 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
- B05D2350/00—Pretreatment of the substrate
- B05D2350/10—Phosphatation
-
- 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
- B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
- B05D2401/30—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant
- B05D2401/32—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant applied as powders
-
- 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
- B05D2504/00—Epoxy polymers
-
- 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
- B05D2508/00—Polyesters
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention relates to the technical field of washing machine production, in particular to a washing machine front panel and a spraying process thereof. The method has the advantages that through the pretreatment step, oil stains on the surface of the panel can be removed, the surface of the panel can be prevented from being corroded, meanwhile, the adhesion of the surface of the panel to powder can be greatly enhanced, and the coating can be effectively prevented from falling off.
Description
Technical Field
The invention relates to the technical field of washing machine production, in particular to a washing machine front panel and a spraying process thereof.
Background
The washing machine is a cleaning appliance for washing clothes by using mechanical action generated by electric energy, and is divided into two types of household appliances and collectors according to the rated washing capacity, and the front panel of the washing machine generally plays roles of man-machine interaction, attractiveness and the like.
Chinese patent No. CN201310514385.9 provides a method for spraying a panel, the panel includes a back surface facing the inside of an air conditioner and a front surface facing the surrounding environment after being installed, the method includes the following steps: s1, cleaning the panel before spraying; and S2, spraying the primer on the front surface of the panel, and drying the primer.
However, although the panel is sprayed by the panel spraying method, the pretreatment of spraying is only clean and is not subjected to operations such as degreasing and phosphorization, so that the adhesion of the coating is not strong, the coating is easy to fall off, and the service life is greatly shortened.
Disclosure of Invention
The invention aims to provide a front panel of a washing machine and a spraying process thereof, which aim to solve the problems that the adhesion of a coating is not strong, the coating is easy to fall off and the service life is greatly reduced because only cleaning is carried out and operations such as degreasing, phosphorization and the like are not carried out in the background technology.
The technical scheme of the invention is as follows: the front panel of the washing machine and the spraying process of the front panel of the washing machine comprise a panel, wherein a roller hole is formed in the center of the front outer wall of the panel, a control panel hole is formed in one side of the front outer wall of the panel and is located above the roller hole, a washing box hole is formed in the outer wall of one side of the front outer wall of the panel, the cross section of the washing box hole is of a rectangular structure, sliding rails distributed equidistantly are welded on the inner wall of one side of the washing box hole, the washing box is connected to the inside of the washing box hole in a sliding mode, a handle is arranged in the center of the front outer wall of the washing box, blanking grooves distributed equidistantly are formed in the inner wall of the bottom of the washing box, the blanking grooves are of a rectangular structure, and fixing columns distributed equidistantly are.
Furthermore, reinforcing ribs which are distributed equidistantly are welded on the outer wall of the side face of the fixing column, and the reinforcing ribs are of triangular structures.
Furthermore, the sliding blocks which are distributed equidistantly are welded on the outer wall of the left side and the outer wall of the right side of the washing box, the stop blocks are welded at the centers of the outer walls of the two sides of the sliding blocks, and the sliding blocks are connected inside the sliding rails in a sliding mode.
Furthermore, the welding of one side of the positive outer wall of panel has the supporter, and opens the waterlogging caused by excessive rainfall groove that is the equidistance and distributes on the positive outer wall of supporter.
Furthermore, one side of the front outer wall of the panel is provided with radiating grooves distributed equidistantly, the radiating grooves are of a rectangular structure, and the outer wall of the back of the panel is welded with clamping blocks distributed equidistantly.
A front panel spraying process of a washing machine is characterized by comprising the following steps:
s1, a pretreatment process of a front panel of a washing machine: the worker firstly puts the front panel of the washing machine in a heating pool filled with SD-102 degreasing agent for degreasing, uses an electric heating method to heat the solution in the heating pool and the front panel of the washing machine, the heating temperature is 30-35 ℃, the heating time is 5-15min, then immersing the degreased front panel of the washing machine in clean water for washing, soaking for 5-10min at normal temperature, after washing, workers place the washed front panel of the washing machine in a soaking pool filled with SC-A surface conditioning agent, soaking at normal temperature for 0.5-2min for surface adjustment, placing the front panel of the washing machine in a heating tank filled with SP922 phosphating solution by an operator after the surface adjustment is finished, heating at 25-40 deg.C for 5-10min for phosphorization, after the phosphating operation is finished, workers place the front panel of the washing machine in clean water at normal temperature for soaking for 5s-1min and then wash the front panel again to finish the pretreatment;
s2, a powder spraying process of a front panel of the washing machine: firstly, an operator carries out drying treatment on a front panel of a pretreated washing machine, the front panel of the washing machine is placed at a normal-temperature backlight position and stands for 1-2h, after the surface of the front panel of the washing machine is waterless, the operator places the front panel of the washing machine on a conveying chain of a powder spraying room, then the indoor epoxy polyester powder coating is used for carrying out powder spraying operation on the surface of the front panel of the washing machine, the electrostatic high voltage is 60-90kV, the electrostatic current is 10-20 muA, the flow speed pressure is 0.30-0.55MPa, the atomization pressure is 0.30-0.45MPa, the warehouse cleaning pressure is 0.5MPa, the fluidization pressure of a powder supply barrel is 0.05-0.08MPa, the distance from a spray gun opening to a workpiece is 260mm, and the conveying chain speed is 4.5-5.5 m/min;
s3, a curing process of the front panel of the washing machine: an operator adjusts the heating temperature of the curing furnace to 180 ℃, after preheating for 3-5min, the front panel of the washing machine which is subjected to the powder spraying process is placed on a conveying frame which penetrates through the interior of the heating furnace, the speed of the conveying frame is set to be 0.5-1m/min, so that the accumulated time of the front panel of the washing machine in the curing furnace is not less than 15min when the actual temperature fluctuation is less than 5 ℃, the surface layer powder on the front panel of the washing machine begins to melt after the temperature rises to a melting point in the curing process, gradually forms a vortex with the internal powder until the powder is completely melted, slowly flows on the surface of the front panel of the washing machine to form a thin and flat layer, the temperature continues to rise to a gel state for a few minutes after reaching a gel point, and then the temperature continues;
s4, cooling and inspecting a front panel of the washing machine: firstly, placing a front panel of a washing machine conveyed out of a curing furnace at a normal-temperature backlight position for standing for 2-3h until the front panel of the washing machine is completely cooled to a normal-temperature state, then manually inspecting the cooled finished product of the front panel of the washing machine, manually inspecting whether the surface of the finished product of the front panel of the washing machine is flat and bright, and has the defects of particles, shrinkage cavities and the like, then inspecting whether the thickness of the finished product of the front panel of the washing machine is controlled within a qualified range by using a vernier caliper, then performing spot inspection on the hardness, the impact strength, the salt fog resistance, the weather resistance and the humidity resistance of the finished product of the front panel of the washing machine, and packaging and.
Further, FAL in the heating pool filled with the SD-102 degreasing agent is 18-20pt, Ph in the soaking pool filled with the SC-A surface conditioning agent is 8-9, total acidity in the heating pool filled with the SP922 phosphating solution is 25-45pt, and free acidity is 1.5-2.5 pt.
Furthermore, the main components of the indoor epoxy polyester powder coating comprise epoxy resin, polyester resin, a curing agent, pigment, filler, a leveling agent, a moisture-proof agent, a corner modifier and the like.
Furthermore, the surface temperature and the accumulated time of the upper, middle and lower 3 points of the front panel of the washing machine are measured by using an SMT (surface mounting technology) furnace temperature tracker during debugging, and the set temperature of the curing furnace and the speed of the conveying frame are adjusted according to the measurement result.
The invention provides a washing machine front panel and a spraying process thereof through improvement, compared with the prior art, the invention has the following improvements and advantages:
(1) through the steps of degreasing, washing, surface conditioning, phosphating and the like of pretreatment, oil stains on the surface of the panel can be removed, the surface of the panel can be prevented from being corroded, meanwhile, the adhesive force of the surface of the panel to powder can be greatly enhanced, the coating can be effectively prevented from falling off, and the service life is greatly prolonged.
(2) The surface temperature and the accumulated time of the front panel of the washing machine in the curing oven are measured by using the SMT oven temperature tracker, the temperature of the curing oven and the running speed of the conveying chain can be adjusted in time, the panel can be treated at the optimal temperature in the curing oven for enough time, the surface of the panel is smoother and smoother, and the coating is firmer and more durable.
(3) Through supporter and the waterlogging caused by excessive rainfall of setting, the supporter can be placed some articles for daily use such as laundry-detergent and soap, prevents to place and causes to dissolve extravagantly subaerial contact moisture, and the waterlogging caused by excessive rainfall groove can keep the drying in the supporter, makes good condition for the storage of article.
Drawings
The invention is further explained below with reference to the figures and examples:
FIG. 1 is a schematic view of a panel structure of the present invention;
FIG. 2 is a schematic view of the back structure of the panel of the present invention;
FIG. 3 is a partially enlarged schematic view of structure A of the present invention;
FIG. 4 is a schematic view of the fixing post structure of the present invention;
FIG. 5 is a schematic diagram of the process flow structure of the present invention.
Description of reference numerals:
1 panel, 2 drum holes, 3 control panel holes, 4 fixture blocks, 5 commodity shelves, 6 waterlogging caused by excessive rainfall grooves, 7 radiating grooves, 8 washing box holes, 9 slide rails, 10 washing boxes, 11 blanking grooves, 12 handles, 13 fixed columns, 14 stop blocks, 15 slide blocks and 16 reinforcing ribs.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 5, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the 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.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention provides a front panel of a washing machine and a spraying process thereof by improvement, as shown in figures 1-5, the front panel comprises a panel 1, a drum hole 2 is arranged at the center of the outer wall of the front surface of the panel 1, a control panel hole 3 is arranged at one side of the outer wall of the front surface of the panel 1, the control panel hole 3 is positioned above the drum hole 2, a washing box hole 8 is arranged at the outer wall of one side of the outer wall of the front surface of the panel 1, the cross section of the washing box hole 8 is of a rectangular structure, slide rails 9 distributed at equal intervals are welded on the inner wall of one side of the washing box hole 8, a washing box 10 is connected inside the washing box hole 8 in a sliding manner and used for containing washing powder or laundry detergent, a handle 12 is arranged at the center of the outer wall of the washing box 10, the washing box 10 is convenient to pull out, blanking grooves 11 distributed at equal intervals are arranged on the inner wall of the, the outer wall of one side of the panel 1 is welded with fixing columns 13 distributed at equal intervals.
Further, the reinforcing ribs 16 distributed equidistantly are welded on the outer wall of the side face of the fixing column 13, and the reinforcing ribs 16 are of triangular structures, so that the fixing column 13 is prevented from being broken from the root.
Further, the sliders 15 distributed equidistantly are welded on the outer wall of the left side and the outer wall of the right side of the washing box 10, the stopper 14 is welded at the center of the outer wall of one side of the slider 15, the washing box 10 is prevented from being separated from the rail, and the sliders 15 are connected inside the sliding rail 9 in a sliding mode.
Furthermore, one side welding of panel 1 front outer wall has supporter 5, can be used to place debris such as washing powder, and opens on the front outer wall of supporter 5 and be the waterlogging caused by excessive rainfall groove 6 that the equidistance distributes, prevents the inside ponding of supporter 5.
Furthermore, the radiating grooves 7 distributed equidistantly are formed in one side of the outer wall of the front face of the panel 1 and used for radiating internal parts of the washing machine, the radiating grooves 7 are of a rectangular structure, and the outer wall of the back face of the panel 1 is welded with the clamping blocks 4 distributed equidistantly and used for fixing the panel 1 and other parts of the washing machine.
A front panel spraying process of a washing machine is characterized by comprising the following steps:
s1, a pretreatment process of a front panel of a washing machine: the worker firstly puts the front panel of the washing machine in a heating pool filled with SD-102 degreasing agent for degreasing, uses an electric heating method to heat the solution in the heating pool and the front panel of the washing machine, the heating temperature is 30-35 ℃, the heating time is 5-15min, then immersing the degreased front panel of the washing machine in clean water for washing, soaking for 5-10min at normal temperature, after washing, workers place the washed front panel of the washing machine in a soaking pool filled with SC-A surface conditioning agent, soaking at normal temperature for 0.5-2min for surface adjustment, placing the front panel of the washing machine in a heating tank filled with SP922 phosphating solution by an operator after the surface adjustment is finished, heating at 25-40 deg.C for 5-10min for phosphorization, after the phosphating operation is finished, workers place the front panel of the washing machine in clean water at normal temperature for soaking for 5s-1min and then wash the front panel again to finish the pretreatment;
s2, a powder spraying process of a front panel of the washing machine: firstly, an operator carries out drying treatment on a front panel of a pretreated washing machine, the front panel of the washing machine is placed at a normal-temperature backlight position and stands for 1-2h, after the surface of the front panel of the washing machine is free from water stains, the operator places the front panel of the washing machine on a conveying chain of a powder spraying room, then the surface of the front panel of the washing machine is subjected to powder spraying operation by using indoor epoxy polyester powder coating, the electrostatic high voltage is 60-90kV, the electrostatic current is 10-20 muA, the flow speed pressure is 0.30-0.55MPa, the atomization pressure is 0.30-0.45MPa, the warehouse cleaning pressure is 0.5MPa, the fluidization pressure of a powder supply barrel is 0.05-0.08MPa, the distance from a spray gun opening to a workpiece is 200-260mm, the speed of the conveying chain is 4.5-5.5m/min, and the model of the powder spraying room is JT 016;
s3, a curing process of the front panel of the washing machine: an operator adjusts the heating temperature of a curing furnace to 180 ℃, after preheating is carried out for 3-5min, a washing machine front panel subjected to a powder spraying process is placed on a conveying frame penetrating through the interior of a heating furnace, the speed of the conveying frame is set to be 0.5-1m/min, the accumulated time of the washing machine front panel in the curing furnace when the actual temperature fluctuation is less than 5 ℃ is not less than 15min, the surface layer powder on the washing machine front panel starts to melt after the temperature rises to a melting point in the curing process, gradually forms a vortex with the internal powder until the powder is completely melted, slowly flows on the surface of the washing machine front panel to form a thin and flat layer, the temperature continues to rise to a gel state which is a few minutes after reaching the gel point, then the temperature continues to rise, the powder is subjected to chemical reaction and is cured, and the type of the;
s4, cooling and inspecting a front panel of the washing machine: firstly, placing a front panel of a washing machine conveyed out of a curing furnace at a normal-temperature backlight position for standing for 2-3h until the front panel of the washing machine is completely cooled to a normal-temperature state, then manually inspecting the cooled finished product of the front panel of the washing machine, manually inspecting whether the surface of the finished product of the front panel of the washing machine is flat and bright, and has the defects of particles, shrinkage cavities and the like, then inspecting whether the thickness of the finished product of the front panel of the washing machine is controlled within a qualified range by using a vernier caliper, then performing spot inspection on the hardness, the impact strength, the salt fog resistance, the weather resistance and the humidity resistance of the finished product of the front panel of the washing machine, and packaging and.
Furthermore, FAL in the heating pool filled with the SD-102 degreasing agent is 18-20pt, Ph in the soaking pool filled with the SC-A surface conditioning agent is 8-9, total acidity in the heating pool filled with the SP922 phosphating solution is 25-45pt, and free acidity is 1.5-2.5 pt.
Furthermore, the main components of the indoor epoxy polyester powder coating are epoxy resin, polyester resin, a curing agent, pigment, filler, a leveling agent, a moisture-proof agent, a corner modifier and the like.
Furthermore, during debugging, an SMT (surface mount technology) furnace temperature tracker is used for measuring the surface temperature and the accumulated time of the upper, middle and lower 3 points of the front panel of the washing machine, and the set temperature and the conveying frame speed of the curing furnace are adjusted according to the measurement result, wherein the SMT furnace temperature tracker is in the model of wickonQ 7.
The working principle of the invention is as follows: the method comprises the steps that a worker firstly puts a front panel of a washing machine into a heating pool with 20pt of FAL and filled with SD-102 degreasing agent for degreasing, the solution in the heating pool and the front panel of the washing machine are heated by an electric heating method, the heating temperature is 35 ℃, the heating time is 5min, then the degreased front panel of the washing machine is immersed into clean water and is immersed for 10min at normal temperature, then the front panel of the washing machine is put into an immersion pool filled with SC-A surface conditioning agent by the worker and is immersed for 2min at normal temperature, then the front panel of the washing machine is put into a heating pool filled with SP922 phosphating solution by the worker, the front panel of the washing machine is heated for 10min at 40 ℃ under the conditions that the total acidity is 40pt and the free acidity is 2pt, after the operation is finished, the front panel of the washing machine is put into clean water at normal temperature and is immersed for 1min to finish the pretreatment, then the front panel of the washing machine after the pretreatment is put into a normal temperature, after the surface of the front panel of the washing machine is dried, an operator places the front panel of the washing machine on a conveying chain of a powder spraying room, then uses indoor epoxy polyester powder coating to perform powder spraying operation on the surface of the front panel of the washing machine, wherein the electrostatic high voltage is 90kV, the electrostatic current is 20 muA, the flow speed pressure is 0.55MPa, the atomization pressure is 0.45MPa, the warehouse cleaning pressure is 0.5MPa, the fluidization pressure of a powder supply barrel is 0.08MPa, the distance from a spray gun opening to a workpiece is 260mm, the speed of the conveying chain is 5m/min, after the front panel of the washing machine passes through the powder spraying room, the operator adjusts the heating temperature of a curing furnace to 180 ℃, after preheating for 3min, places the front panel of the washing machine on a conveying frame penetrating through the interior of a heating furnace, sets the speed of the conveying frame to be 0.5m/min, so that the actual temperature fluctuation of the front panel of the washing machine in the curing furnace is less than 5 ℃ for 15min, after the temperature rises to the melting point in the curing process, surface powder on the front panel of the washing machine begins to melt, gradually forms vortex with internal powder until the powder is completely melted, slowly flows on the surface of the front panel of the washing machine to form a thin and flat layer, has a short gelling state after the temperature continues to rise to the glue point, then the temperature continues to rise, and the powder is subjected to chemical reaction and is cured, then an operator places the front panel of the washing machine at a normal-temperature backlight place for standing for 3 hours until the front panel of the washing machine is completely cooled to the normal-temperature state, then the cooled finished product of the front panel of the washing machine is manually inspected to check whether the defects such as flatness, brightness, particles, shrinkage cavities and the like exist, then a vernier caliper is used for checking whether the thickness of the finished product of the front panel of the washing machine is controlled within a qualified range, and then the hardness, impact strength, salt fog resistance, weather resistance, after all the products reach the standard, the products can be packaged and put in storage.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A washing machine front panel, characterized in that: comprises a panel (1), a roller hole (2) is arranged at the center of the outer wall of the front surface of the panel (1), a control panel hole (3) is arranged at one side of the outer wall of the front surface of the panel (1), and the control panel hole (3) is positioned above the roller hole (2), the outer wall of one side of the outer wall of the front surface of the panel (1) is provided with a washing box hole (8), the cross section of the washing box hole (8) is in a rectangular structure, sliding rails (9) which are distributed at equal intervals are welded on the inner wall of one side of the washing box hole (8), a washing box (10) is connected inside the washing box hole (8) in a sliding way, a handle (12) is arranged at the center of the outer wall of the front side of the washing box (10), the inner wall of the bottom of the washing box (10) is provided with feeding grooves (11) which are distributed at equal intervals, and the blanking groove (11) is of a rectangular structure, and fixing columns (13) which are distributed at equal intervals are welded on the outer wall of one side of the panel (1).
2. A washing machine front panel as claimed in claim 1, wherein: reinforcing ribs (16) distributed at equal intervals are welded on the outer wall of the side face of the fixing column (13), and the reinforcing ribs (16) are of a triangular structure.
3. A washing machine front panel as claimed in claim 1, wherein: the washing box is characterized in that sliding blocks (15) distributed equidistantly are welded on the outer wall of the left side and the outer wall of the right side of the washing box (10), a stop block (14) is welded at the center of the outer wall of one side of each sliding block (15), and each sliding block (15) is connected inside the corresponding sliding rail (9) in a sliding mode.
4. A washing machine front panel as claimed in claim 1, wherein: one side welding of panel (1) front outer wall has supporter (5), and opens on the front outer wall of supporter (5) and has waterlogging caused by excessive rainfall groove (6) that are the equidistance and distribute.
5. A washing machine front panel as claimed in claim 1, wherein: one side of the front outer wall of the panel (1) is provided with radiating grooves (7) distributed equidistantly, the radiating grooves (7) are of a rectangular structure, and the outer wall of the back of the panel (1) is welded with clamping blocks (4) distributed equidistantly.
6. A front panel spraying process of a washing machine is characterized by comprising the following steps:
s1, a pretreatment process of a front panel of a washing machine: the worker firstly puts the front panel of the washing machine in a heating pool filled with SD-102 degreasing agent for degreasing, uses an electric heating method to heat the solution in the heating pool and the front panel of the washing machine, the heating temperature is 30-35 ℃, the heating time is 5-15min, then immersing the degreased front panel of the washing machine in clean water for washing, soaking for 5-10min at normal temperature, after washing, workers place the washed front panel of the washing machine in a soaking pool filled with SC-A surface conditioning agent, soaking at normal temperature for 0.5-2min for surface adjustment, placing the front panel of the washing machine in a heating tank filled with SP922 phosphating solution by an operator after the surface adjustment is finished, heating at 25-40 deg.C for 5-10min for phosphorization, after the phosphating operation is finished, workers place the front panel of the washing machine in clean water at normal temperature for soaking for 5s-1min and then wash the front panel again to finish the pretreatment;
s2, a powder spraying process of a front panel of the washing machine: firstly, an operator carries out drying treatment on a front panel of a pretreated washing machine, the front panel of the washing machine is placed at a normal-temperature backlight position and stands for 1-2h, after the surface of the front panel of the washing machine is waterless, the operator places the front panel of the washing machine on a conveying chain of a powder spraying room, then the indoor epoxy polyester powder coating is used for carrying out powder spraying operation on the surface of the front panel of the washing machine, the electrostatic high voltage is 60-90kV, the electrostatic current is 10-20 muA, the flow speed pressure is 0.30-0.55MPa, the atomization pressure is 0.30-0.45MPa, the warehouse cleaning pressure is 0.5MPa, the fluidization pressure of a powder supply barrel is 0.05-0.08MPa, the distance from a spray gun opening to a workpiece is 260mm, and the conveying chain speed is 4.5-5.5 m/min;
s3, a curing process of the front panel of the washing machine: an operator adjusts the heating temperature of the curing furnace to 180 ℃, after preheating for 3-5min, the front panel of the washing machine which is subjected to the powder spraying process is placed on a conveying frame which penetrates through the interior of the heating furnace, the speed of the conveying frame is set to be 0.5-1m/min, so that the accumulated time of the front panel of the washing machine in the curing furnace is not less than 15min when the actual temperature fluctuation is less than 5 ℃, the surface layer powder on the front panel of the washing machine begins to melt after the temperature rises to a melting point in the curing process, gradually forms a vortex with the internal powder until the powder is completely melted, slowly flows on the surface of the front panel of the washing machine to form a thin and flat layer, the temperature continues to rise to a gel state for a few minutes after reaching a gel point, and then the temperature continues;
s4, cooling and inspecting a front panel of the washing machine: firstly, placing a front panel of a washing machine conveyed out of a curing furnace at a normal-temperature backlight position for standing for 2-3h until the front panel of the washing machine is completely cooled to a normal-temperature state, then manually inspecting the cooled finished product of the front panel of the washing machine, manually inspecting whether the surface of the finished product of the front panel of the washing machine is flat and bright, and has the defects of particles, shrinkage cavities and the like, then inspecting whether the thickness of the finished product of the front panel of the washing machine is controlled within a qualified range by using a vernier caliper, then performing spot inspection on the hardness, the impact strength, the salt fog resistance, the weather resistance and the humidity resistance of the finished product of the front panel of the washing machine, and packaging and.
7. A washing machine front panel spray coating process as claimed in claim 6, wherein: the FAL in the heating pool filled with the SD-102 degreasing agent is 18-20pt, the Ph value in the soaking pool filled with the SC-A surface conditioning agent is 8-9, the total acidity in the heating pool filled with the SP922 phosphating solution is 25-45pt, and the free acidity is 1.5-2.5 pt.
8. A washing machine front panel spray coating process as claimed in claim 6, wherein: the main components of the indoor epoxy polyester powder coating are epoxy resin, polyester resin, a curing agent, pigment, filler, a leveling agent, a moisture-proof agent, a corner modifier and the like.
9. A washing machine front panel spray coating process as claimed in claim 6, wherein: during debugging, an SMT furnace temperature tracker is used for measuring the surface temperature and the accumulated time of the upper, middle and lower 3 points of the front panel of the washing machine, and the set temperature of the curing furnace and the speed of the conveying frame are adjusted according to the measurement result.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112941843A (en) * | 2021-04-09 | 2021-06-11 | 滁州市友邦涂装有限公司 | Anti-corrosion washing machine cover plate and production spraying process thereof |
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