CN114653561A - Powder coating method for wood base material - Google Patents
Powder coating method for wood base material Download PDFInfo
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- CN114653561A CN114653561A CN202210291239.3A CN202210291239A CN114653561A CN 114653561 A CN114653561 A CN 114653561A CN 202210291239 A CN202210291239 A CN 202210291239A CN 114653561 A CN114653561 A CN 114653561A
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- 239000000843 powder Substances 0.000 title claims abstract description 73
- 238000000576 coating method Methods 0.000 title claims abstract description 58
- 239000000463 material Substances 0.000 title claims abstract description 21
- 239000002023 wood Substances 0.000 title claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 50
- 239000011248 coating agent Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000428 dust Substances 0.000 claims abstract description 17
- 238000007761 roller coating Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000011094 fiberboard Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 25
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 21
- 229910052753 mercury Inorganic materials 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 13
- 239000000047 product Substances 0.000 claims description 13
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 12
- 229910052733 gallium Inorganic materials 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000013072 incoming material Substances 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 230000007547 defect Effects 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000002950 deficient Effects 0.000 claims description 3
- 230000000994 depressogenic effect Effects 0.000 claims description 3
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- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 230000002262 irrigation Effects 0.000 claims description 3
- 238000003973 irrigation Methods 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 3
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 210000002268 wool Anatomy 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 239000013589 supplement Substances 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims description 2
- 244000137852 Petrea volubilis Species 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000003973 paint Substances 0.000 abstract description 8
- 238000000465 moulding Methods 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 4
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/06—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 wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
- B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to the technical field of base material powder coating, and discloses a wood base material powder coating method, which comprises the following steps: s1: treating a base material by adopting a medium density fiberboard as the base material; s2: coating edges; s3: the UV primer is coated on the surface of the plate in a roller way, and during coating, the machine which sequentially passes through is as follows: the device comprises a sander, a dust remover, a conveyor, a putty coating machine, a three-lamp curing machine, a conveyor, a sander, a conveyor, a double-roller coating machine, a double-lamp curing machine, a conveyor, a double-roller coating machine, an infrared leveling machine, a three-lamp curing machine and a conveyor; s4: and injecting water into the holes. According to the invention, the oily UV white primer and the oily laser white primer are adopted for sealing, the water resistance is superior to that of the water-based paint sealing primer, the water resistance is better, the product quality and performance are qualified by improving the original two-time powder spraying molding into one-time powder spraying molding, the cost of powder raw materials is reduced, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of base material powder coating, in particular to a wood base material powder coating method.
Background
The powder spraying is to spray powder coating on the surface of a substrate by using powder spraying equipment, the powder can be uniformly adsorbed on the surface of the substrate to form a powdery coating, the powdery coating is baked, leveled and cured at high temperature to form final coatings with different effects, the spraying effect of the powder spraying is superior to that of a paint spraying process in the aspects of mechanical strength, adhesive force, corrosion resistance, aging resistance and the like, and the cost is also under the condition of spraying paint with the same effect.
The application of the existing-grade powder coating is more and more extensive, and is more and more accepted by people in the household industry, but the following problems still exist in the construction process and the performance aspect of the powder: (1) in the construction of the powder, a good powder film can be formed only by secondary spraying on the modeling plate, so that the production efficiency is reduced, and the cost of raw materials is increased; (2) the water paint primer is adopted as the seal primer, so that the problem of poor seal performance exists, and the plate is easy to crack and deform in the using process, particularly in the environment with high air humidity (the weather in the south in summer); (3) the automation degree in the powder coating process is low, and the production efficiency is reduced, so that the powder coating method for the wood base material is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a powder coating method for a wood substrate, which solves the problems that the existing powder coating can form a good powder film only by secondary spraying aiming at a molded plate in the construction process, the production efficiency is reduced, and the cost of raw materials is increased at the same time.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
a wood substrate powder coating method comprises the following steps:
s1: treating a base material, namely adopting a medium density fiberboard as the base material, wherein the water content is required to be 8-13%, the density is required to be 760-860kg/m3, and the incoming material production date is less than or equal to 6 months;
s2: coating edges, namely performing edge coating operation on the edges of the panel by using a MARKOR edge coating machine, wherein the linear speed of the edge coating machine is 15-20m/min, coating edges by using two kinds of white primers, namely Xigui FZ-009P-A1 and Xigui FZ-009P-A1, wherein FZ-009P-A1 is a first white primer, spraying once, then drying by using a crop lamp, and FZ-009P-B1 is a second white primer, spraying 3 times, and drying by using the crop lamp and a mercury lamp to realize complete curing and drying of the UV primer at the edges of the panel;
s3: the UV primer is coated on the surface of the plate in a roller way, and during coating, the machine which sequentially passes through is as follows: the device comprises a sander, a dust remover, a conveyor, a putty coating machine, a three-lamp curing machine, a conveyor, a sander, a conveyor, a double-roller coating machine, a double-lamp curing machine, a conveyor, a double-roller coating machine, an infrared leveling machine, a three-lamp curing machine and a conveyor;
s4: injecting water into the hole, using mineral water or tap water, filling the hanging part hole with a 100ml extrusion type sprinkling can made of plastic materials, and wiping the hanging part hole after the hanging part hole is fully wetted for 3-5 min;
s5: the hanging plate is characterized in that a person on the upper plate wears non-cotton gloves, the gloves are hung in a parallel or inverted V shape according to the distance between hanging holes of the plate and the height of the plate, the ends of the hanging hook are fully embedded into the holes, and a standard hanging tool is used for hanging single rows, double rows or three rows from top to bottom;
s6: dedusting, wherein the surfaces of the hung plates are completely dedusted by a dust blowing gun and a rag;
s7: preheating the plate, wherein the plate is preheated for 23-28 min, and when the set temperature of the furnace temperature and the actual temperature are more than or equal to 5 ℃, the set temperature of the furnace temperature needs to be increased or decreased, and the temperature difference is reduced;
s8: powder spraying, wherein the powder spraying operation is carried out on the modeling and the flat plate by adopting a one-time spraying process;
s9: curing the powder, wherein the temperature is required to be controlled at 140 ℃ during curing, so that the upper temperature and the lower temperature of the plate are ensured to be consistent;
s10: cooling, feeding the powder sprayed product into a discharging area after powder spraying, putting the powder sprayed product on a high-temperature-resistant glove to take a plate by staff to obtain a finished product, and then horizontally placing the finished product on an inspection table for appearance inspection;
s11: and (4) testing the performance, including the solidification degree of the powder, the thickness of the sprayed powder, the adhesive force, the hardness and the irrigation performance.
As a further scheme of the present invention, in S1, a grade E0 sanwei board is preferably adopted, incoming materials are packaged by a PE protective film, boards need to be stored in a designated area, and the storage environment requires: 15-40 ℃, the storage environment humidity is 30-70%, if the stacking site humidity exceeds 80% and the stacking time exceeds 8 hours and the flow is not transferred to the next procedure, the blank is completely wrapped by a PE film or enters a constant temperature and humidity room for storage, the defects of holes, depressions, pollution, corner collapse, impact damage and the like on the surface and the edge of the blank are checked, the defective places are timely treated, the depressed positions are filled with atomic ash, and the main agent of the atomic ash is as follows: the hardening agent is 100:2, the using time is 7-10 minutes, the atomic ash is higher than the plane position, and the polishing is carried out after 60 minutes.
Furthermore, the surface of the place with ash supplement in the S1 is sanded by 240-mesh abrasive paper, edges and corners, groove lines and milling parts on the periphery are manually lightly sanded, the whole body is required to be evenly and smoothly sanded, the R-shaped edge is visually straight, the four edges and corners are perpendicular, no hands are scraped, no obvious wood wool exists, and the milling parts are smooth and have no deformation.
On the basis of the scheme, the UV primer at the edge part after drying in the step S2 needs to be sanded for 5 times, the sanding belt is more than 320 meshes, and the surface of the edge part is required to have no bright points, no bottom penetration and uniform sanding.
Further, among S3, the sanding machine equipment parameter need be adjusted according to panel actual conditions, and when opening the dust shaker, the height-adjusting is unanimous with panel, guarantees that the panel surface does not have dust impurity, conveyer conveying speed parameter: 10.0m/min, and the rotating speed parameters of a metering roller of the putty coating machine are as follows: 2.0m/min, coating roll rotation speed parameter: 10.0 m/min; scraping and repairing roller rotating speed parameters: 2.0m/min, conveying speed parameter: 10.0m/min, putty coating weight: 30-45g per square meter, and the type of the putty is as follows: TU-D1102, the lamp tube of the three-lamp curing machine is three mercury lamps, only one mercury lamp is started during working, and the power is set as follows: 35 percent; curing energy parameters: UVA: 100-140mj/cm2，UVV:100-140mj/cm2Double roller coating machineAll the rubber rollers are ordinary rubber rollers, only the first rubber roller is used during working, and the rotating speed parameters of the roller are measured: 2.5 m/min; coating roll rotation speed parameters: 10.0m/min, conveying speed parameter: 10.0m/min, white base coat weight: 30-40 g/square meter, white bottom model: CU-G111W, the lamp tube of the double-lamp curing machine is a gallium lamp and a mercury lamp, the two lamps are all turned on during working, and the power is set as follows: gallium lamp 50%, mercury lamp 35%, curing energy parameters: UVA:200-2，UVV:700-900mj/cm2And the conveying speed parameter of the infrared leveling machine is as follows: 10.0m/min, when the room temperature is lower than 15 ℃, the heating is needed to be started, the lamp tubes of the three-lamp curing machine used finally are a gallium lamp and two mercury lamps, when the three-lamp curing machine works, the three lamps are all started, and the power is set as follows: 80% of gallium lamp, 80% of mercury lamp, and 80% of curing energy parameter: UVA 1000-2，UVV:1000-1200mj/cm2。
On the basis of the scheme, positions of hanging holes, door hinge holes and the wire groove models are heavily cleaned when dust is removed in the S6.
In a further scheme of the invention, in the S7, the preheating furnace supplies 12 Hz air, the air draft is 50 Hz, the total pressure of the fuel gas in the preheating furnace is 24-26KPA, and the pressure of the fuel gas entering the furnace is 26-28 mbar.
(III) advantageous effects
Compared with the prior art, the invention provides a wood base material powder coating method, which has the following beneficial effects:
1. in the invention, the oily UV white primer and the oily laser white primer are adopted for sealing, the water resistance is superior to that of the water paint sealing primer, and the water resistance is better.
2. In the invention, the automatic roller coating of the UV primer and the spraying of the powder are adopted, so that the mechanical property is improved, the time and the labor are saved, and the overall production efficiency is improved by more than 50%.
3. According to the invention, the original two-time powder spraying molding is improved into one-side powder spraying molding, the product quality performance is qualified, the cost of powder raw materials is reduced by more than 20%, the production efficiency is improved by more than 30%, the temperature is strictly controlled during curing, the uniform heating of the upper temperature and the lower temperature of a plate is ensured, and the powder curing rate is improved.
Drawings
Fig. 1 is a schematic flow structure diagram of a powder coating method for a wood substrate according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, a powder coating method for a wood substrate comprises the following steps:
s1: treating a base material, namely adopting a medium density fiberboard as the base material, wherein the water content is required to be 8-13%, the density is required to be 760-860kg/m3, the incoming material production date is less than or equal to 6 months, preferably adopting an E0 grade Sanwei board, packaging the incoming material by using a PE protective film, storing the board in a designated area, and storing the board at the ambient temperature: 15-40 ℃, the storage environment humidity is 30-70%, if the stacking site humidity exceeds 80% and the stacking time exceeds 8 hours and the flow is not transferred to the next procedure, the blank is completely wrapped by a PE film or enters a constant temperature and humidity room for storage, the defects of holes, depressions, pollution, corner collapse, impact damage and the like on the surface and the edge of the blank are checked, the defective places are timely treated, the depressed positions are filled with atomic ash, and the main agent of the atomic ash is as follows: the hardening agent is 100:2, the usable time is 7-10 minutes, the putty is higher than the plane position, the putty is polished after 60 minutes, the surface of a place with the putty is polished by 240-mesh abrasive paper, edges, groove lines and milling parts are manually lightly polished, the whole body is required to be uniformly and smoothly polished, the edge of an R corner is visually straight, the edge of the four corners is vertical, the hand is not scraped, no obvious wood wool exists, and the milling parts are smooth and have no deformation;
s2: coating edges, namely performing edge coating operation on the edges of the panel by using a MARKOR edge coating machine, wherein the linear speed of the edge coating machine is 15-20m/min, coating edges by using two kinds of white primers, namely rare FZ-009P-A1 and rare FZ-009P-A1, wherein FZ-009P-A1 is a first white primer, spraying once, drying by using a crop lamp, and FZ-009P-B1 is a second white primer, spraying 3 times, drying by using a crop lamp and a mercury lamp to realize complete curing and drying of the UV primers on the edges of the panel, and the UV primers are sealed by using the white primers and the oily white primers, the water resistance is superior to that of water-based paint seal primers, so that the edge UV after drying needs to be sanded for 5 times, and an abrasive belt is more than 320 meshes, so that no bright spots exist on the surfaces of the primers, and the surfaces of the primers are not transparent and uniform;
the specific curing and drying parameters of the UV primer on the edge of the plate are as follows:
s3: the UV primer is coated on the surface of the plate in a roller way, and during coating, the machine which sequentially passes through is as follows: grinder, the dust shaker, a conveyor, the putty coating machine, three lamps of solidifier, a conveyor, a grinder, a conveyor, two roller coating machines, two lamp of solidifier, a conveyor, two roller coating machines, infrared levelling machine, three lamps of solidifier, a conveyor, adopt automatic roller coat UV priming paint and spraying powder, improve mechanized performance, time saving and labor saving, and the totality improves production efficiency more than 50%, grinder equipment parameter need adjust according to panel actual conditions, guarantee that panel sand light levels evenly, when opening the dust shaker, height regulation is unanimous with panel, guarantee that the panel surface does not have dust impurity, conveyer transport speed parameter: 10.0m/min, and the rotating speed parameters of a metering roller of the putty coating machine are as follows: 2.0m/min, coating roll rotation speed parameter: 10.0 m/min; and (3) scraping and supplementing roller rotating speed parameters: 2.0m/min, conveying speed parameter: 10.0m/min, putty coating weight: 30-45g per square meter, and the type of the putty is as follows: TU-D1102, the lamp tube of the three-lamp curing machine is three mercury lamps, only one mercury lamp is started during working, and the power is set as follows: 35 percent; curing energy parameters: UVA: 100-140mj/cm2，UVV:100-140mj/cm2The double-roller coating machine is a common rubber roller, only the first rubber roller is used during working, and the rotating speed parameters of the metering roller are as follows: 2.5 m/min; coating roll rotation speed parameters: 10.0m/min, conveying speed parameter: 10.0m/min, white base coat weight: 30-40g per square meter, white bottom model: CU-G111W, the lamp tube of the double-lamp curing machine is a gallium lamp and a mercury lamp, the two lamps are all turned on during working, and the power is set as follows: 50% of gallium lamp, 35% of mercury lamp,curing energy parameters: UVA:200-2，UVV:700-900mj/cm2And the conveying speed parameter of the infrared leveling machine is as follows: 10.0m/min, when the room temperature is lower than 15 ℃, the heating is needed to be started, the lamp tubes of the three-lamp curing machine used finally are a gallium lamp and two mercury lamps, when the three-lamp curing machine works, the three lamps are all started, and the power is set as follows: 80% of gallium lamp, 80% of mercury lamp, and 80% of curing energy parameter: UVA 1000-2，UVV:1000-1200mj/cm2；
S4: injecting water into the hole, using mineral water or tap water, filling the hanging part hole with a 100ml extrusion type sprinkling can made of plastic materials, and wiping the hanging part hole after the hanging part hole is fully wetted for 3-5 min;
s5: the hanging plate is characterized in that a person on the upper plate wears non-cotton gloves, the gloves are hung in a parallel or inverted V shape according to the distance between hanging holes of the plate and the height of the plate, the ends of the hanging hook are fully embedded into the holes, and a standard hanging tool is used for hanging single rows, double rows or three rows from top to bottom;
s6: the plate is subjected to dust removal, the surface of the hung plate is subjected to comprehensive dust removal by using a dust blowing gun and a cleaning cloth, and positions of hanging holes, door hinge holes and the wire groove models are intensively cleaned during dust removal;
s7: preheating the plate, wherein the preheating time of the plate is 23-28 min, when the set temperature of the furnace temperature is more than or equal to 5 ℃, the set temperature of the furnace temperature needs to be increased or decreased, the temperature difference is reduced, the air supply of the preheating furnace is 12 Hz, the air draft is 50 Hz, the total pressure of the gas in the preheating furnace is 24-26KPA, and the gas inlet pressure is 26-28 mbar;
s8: powder spraying, molding and plate piece all adopt a one-time spraying process to carry out powder spraying operation, and the specific parameters of the one-time spraying and the two-time spraying are compared as follows:
the original two-time powder spraying forming is improved into one-time powder spraying forming, the product quality performance is qualified, the cost of powder raw materials is reduced by more than 20%, and the production efficiency is improved by more than 30%;
s9: curing the powder, wherein the temperature is required to be controlled at 140 ℃ during curing, so that the upper temperature and the lower temperature of the plate are ensured to be consistent;
s10: cooling, feeding the powder sprayed product into a discharging area after powder spraying, putting the staff on high-temperature-resistant gloves to take the board to obtain a finished product, and then horizontally placing the finished product on an inspection table for appearance inspection;
s11: and (3) performance test, wherein the detection comprises powder curing degree, powder spraying film thickness, adhesive force, hardness and irrigation performance, and the comparison result of performance detection indexes is as follows: the overall performance indexes of the original powder spraying process (twice powder spraying and water-based primer spraying) and the existing powder spraying process (improved and then once powder spraying) are qualified, wherein the main areas are that the thickness of the powder spraying film of the original powder spraying process (twice powder spraying and water-based primer spraying) is thicker, but the water resistance of the existing powder spraying process (improved and then once powder spraying) is lower than that of the existing powder spraying process (improved and then once powder spraying) due to the adoption of the water-based paint as the seal primer, and the risk of cracking and deformation exists in the using process:
in the description herein, it is noted that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The wood base material powder coating method is characterized by comprising the following steps:
s1: treating a base material, namely adopting a medium density fiberboard as the base material, wherein the water content is required to be 8-13%, the density is required to be 760-860kg/m3, and the incoming material production date is less than or equal to 6 months;
s2: coating edges, namely performing edge coating operation on the edges of the panel by using a MARKOR edge coating machine, wherein the linear speed of the edge coating machine is 15-20m/min, coating edges by using two kinds of white primers, namely Xigui FZ-009P-A1 and Xigui FZ-009P-A1, wherein FZ-009P-A1 is a first white primer, spraying once, then drying by using a crop lamp, and FZ-009P-B1 is a second white primer, spraying 3 times, and drying by using the crop lamp and a mercury lamp to realize complete curing and drying of the UV primer at the edges of the panel;
s3: the UV primer is coated on the surface of the plate in a roller way, and during coating, the machine which sequentially passes through is as follows: a sander, a dust remover, a conveyor, a putty coating machine, a three-lamp curing machine, a conveyor, a sander, a conveyor, a double-roller coating machine, a double-lamp curing machine, a conveyor, a double-roller coating machine, an infrared leveling machine, a three-lamp curing machine and a conveyor;
s4: injecting water into the hole, using mineral water or tap water, filling the hanging part hole with a 100ml extrusion type sprinkling can made of plastic materials, and wiping the hanging part hole after the hanging part hole is fully wetted for 3-5 min;
s5: the hanging plate is characterized in that a person on the upper plate wears non-cotton gloves, the gloves are hung in a parallel or inverted V shape according to the distance between hanging holes of the plate and the height of the plate, the ends of the hanging hook are fully embedded into the holes, and a standard hanging tool is used for hanging single rows, double rows or three rows from top to bottom;
s6: dedusting, wherein the surfaces of the hung plates are completely dedusted by a dust blowing gun and a rag;
s7: preheating the plate, wherein the plate is preheated for 23-28 min, and when the set temperature of the furnace temperature and the actual temperature are more than or equal to 5 ℃, the set temperature of the furnace temperature needs to be increased or decreased, and the temperature difference is reduced;
s8: powder spraying, wherein the powder spraying operation is carried out on the modeling and the flat plate by adopting a one-time spraying process;
s9: curing the powder, wherein the temperature is required to be controlled at 140 ℃ during curing, so that the upper temperature and the lower temperature of the plate are ensured to be consistent;
s10: cooling, feeding the powder sprayed product into a discharging area after powder spraying, putting the powder sprayed product on a high-temperature-resistant glove to take a plate by staff to obtain a finished product, and then horizontally placing the finished product on an inspection table for appearance inspection;
s11: and (4) testing the performance, including the solidification degree of the powder, the thickness of the sprayed powder, the adhesive force, the hardness and the irrigation performance.
2. The method as claimed in claim 1, wherein in S1, the grade E0 sanwei board is preferably used, the incoming material is packaged by PE protective film, the board is stored in a designated area, and the storage environment requires: 15-40 ℃, the storage environment humidity is 30-70%, if the stacking site humidity exceeds 80% and the stacking time exceeds 8 hours and the flow is not transferred to the next procedure, the blank is completely wrapped by a PE film or enters a constant temperature and humidity room for storage, the defects of holes, depressions, pollution, corner collapse, impact damage and the like on the surface and the edge of the blank are checked, the defective places are timely treated, the depressed positions are filled with atomic ash, and the main agent of the atomic ash is as follows: the hardening agent is 100:2, the using time is 7-10 minutes, the atomic ash is higher than the plane position, and the polishing is carried out after 60 minutes.
3. The method as claimed in claim 2, wherein the surface of the area with ash supplement in S1 is sanded with 240-mesh sand paper, and the peripheral edges, grooves and milled areas are sanded manually, so that the entire area is sanded uniformly and smoothly, the R-edge is visually straight, the four edges are vertical, no scratch is caused, no wood wool is obvious, and the milled areas are smooth and free of deformation.
4. The method for powder coating of a wooden substrate as claimed in claim 1, wherein the UV primer of the edge portion after drying in S2 is sanded 5 times, and the sanding belt is 320 mesh or more, so that the surface of the edge portion is required to have no bright spots, no penetration, and uniform sanding.
5. The method as claimed in claim 1, wherein the parameters of the sander in S3 are adjusted according to the actual condition of the board, and the height and the board are adjusted when the sander is turned onThe material is unanimous, guarantees that panel surface does not have dust impurity, and conveyer conveying speed parameter: 10.0m/min, and the rotating speed parameters of a metering roller of the putty coating machine are as follows: 2.0m/min, coating roll rotation speed parameter: 10.0 m/min; and (3) scraping and supplementing roller rotating speed parameters: 2.0m/min, conveying speed parameter: 10.0m/min, putty coating weight: 30-45g per square meter, and the putty types are as follows: TU-D1102, the lamp tube of the three-lamp curing machine is three mercury lamps, only one mercury lamp is started during working, and the power is set as follows: 35 percent; curing energy parameters: UVA: 100-140mj/cm2，UVV:100-140mj/cm2The double-roller coating machine is a common rubber roller, only the first rubber roller is used during working, and the rotating speed parameters of the rollers are measured: 2.5 m/min; coating roll rotation speed parameters: 10.0m/min, conveying speed parameter: 10.0m/min, white base coat weight: 30-40g per square meter, white bottom model: CU-G111W, the lamp tube of the double-lamp curing machine is a gallium lamp and a mercury lamp, the two lamps are all turned on when the curing machine works, and the power is set as follows: gallium lamp 50%, mercury lamp 35%, curing energy parameters: UVA:200-2，UVV:700-900mj/cm2And the conveying speed parameter of the infrared leveling machine is as follows: 10.0m/min, when the room temperature is lower than 15 ℃, the heating is needed to be started, the lamp tubes of the three-lamp curing machine used finally are a gallium lamp and two mercury lamps, when the three-lamp curing machine works, the three lamps are all started, and the power is set as follows: 80% of gallium lamp, 80% of mercury lamp, and 80% of curing energy parameter: UVA 1000-2，UVV:1000-1200mj/cm2。
6. The method as claimed in claim 3, wherein the positions of the hanging hole, the hinge hole and the wire groove are heavily cleaned during dust removal in S6.
7. The wood substrate powder coating method as claimed in claim 1, wherein the preheating furnace in S7 is used for blowing 12 hz, blowing 50 hz, total gas pressure of the preheating furnace is 24-26KPA, and gas feed pressure is 26-28 mbar.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115464726A (en) * | 2022-09-21 | 2022-12-13 | 索菲亚家居股份有限公司 | Preparation method of powder spraying arc-shaped product and special die |
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| CN112300664A (en) * | 2020-11-24 | 2021-02-02 | 湖南连心科技有限公司 | Powder coating for surface of wood product and spraying method |
| CN113913092A (en) * | 2021-11-01 | 2022-01-11 | 赣州市博品家具有限公司 | High-leveling transparent woodenware powder coating with curing temperature lower than water boiling point and preparation method thereof |
| CN114146883A (en) * | 2021-12-03 | 2022-03-08 | 江苏无锡欧派集成家居有限公司 | Coating process of bright paint |
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| CN107972155A (en) * | 2017-12-04 | 2018-05-01 | 武汉科技大学 | A kind of medium density fibre board (MDF) powdery paints electrostatic painting method |
| CN112300664A (en) * | 2020-11-24 | 2021-02-02 | 湖南连心科技有限公司 | Powder coating for surface of wood product and spraying method |
| CN113913092A (en) * | 2021-11-01 | 2022-01-11 | 赣州市博品家具有限公司 | High-leveling transparent woodenware powder coating with curing temperature lower than water boiling point and preparation method thereof |
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