Preparation method of artificial board flatly pasted solid color PET film and roll coating equipment thereof

Abstract

The application discloses a preparation method of a flatly pasted solid color PET film of a wood-based board and a roll coating equipment thereof, and comprises the following steps: performing light polishing on both sides of the wood-based board to obtain a board; performing one-time dust removal on the surface of the board; roll coating water-based paint on the surface of the board; drying the surface of the board into a film by using infrared lamps; performing light polishing on the surface of the board; performing one-time dust removal on the surface of the board; roll coating UV sanding primer on the surface of the board; performing ultraviolet curing on the surface of the board by using a gallium lamp and a mercury lamp; detecting the surface effect of the board, and storing the qualified products for use; sanding the board; performing one-time dust removal on the surface of the board; roll coating PUR hot melt adhesive on the surface of the board, and uniformly roll coating the hot melt adhesive; quickly pressing and pasting the PET film on the surface of the board and cutting the PET film; cooling and detecting the surface of the board, and storing the board. The application can significantly reduce the cost of the popular flatly pasted PET film, and improve the production efficiency and reduce energy consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flatly pasting PET film on artificial board, and particularly relates to a preparation method of flatly pasting solid-color PET film on artificial board and a roll coating equipment thereof. BACKGROUND

[0002] With the development of economy, people's living standards are continuously improved, and people's demand for furniture is also increasing. People no longer only focus on the durability of furniture, but more on the style and color of furniture. That is, decoration and beauty become the main pursuit. After long-term development, the furniture industry has preliminarily established a complete industrial system with relatively complete categories and international standards. The development trend of furniture has also changed from the previous quantity expansion to green environmental protection, production intelligence, branding, production customization and modular subdivision assembly. Modular subdivision assembly (assembled furniture) has become the development direction of furniture.

[0003] Under the background of furniture modular subdivision assembly, the application of plate type board has developed rapidly, mainly including surface veneering or paint finishing processing on fiberboard, blockboard, particle board and plywood and other artificial plate type boards. From the aspects of decoration, practicality and economy, the PET film pasting is rapidly developed and popular in the market. The PET film pasted on the artificial board has strong decorative effect and protection, but the fiberboard and other artificial boards must be pretreated before the PET film is pasted, otherwise the flat pasting film will not be firm, delamination, blistering, cracking and other defects will exist due to insufficient surface flatness and existence of board gap bubbles.

[0004] At present, the whole process of flatly pasting PET film on fiberboard in the market includes three steps. The first step is to make melamine paper, which includes the steps of raw paper impregnation, impregnated paper pre-solidification and low-temperature constant humidity storage. This step has a certain pollution to the environment due to pre-solidification and organic matter volatilization, and consumes a large amount of electric energy due to low-temperature constant humidity storage. The second step is to press the melamine board, which includes the steps of fiberboard substrate treatment, manual laying of melamine paper, high-temperature high-pressure pressing, natural cooling and storage. The hot pressing temperature is generally controlled at 145-165℃, the pressure is generally 2.0-3.0mpa, and the time length is controlled at 40-50S. A large amount of electric energy is consumed in this process. The cost of paper and other materials for making a melamine board from a fiberboard is 35 yuan plus labor cost, and the energy consumption cost of a board is at least 50 yuan or more. The third step is to flatly paste the PET film, which includes the steps of melamine board sanding, hot melt glue dissolving and coating, flatly pasting the PET film, steel roller flattening, cutting, cooling and packaging storage.

[0005] The following defects exist in the process of using melamine board to pretreat the fiberboard and then flatly pasting the decorative film such as PET film:

[0006] 1、Will increase the plate formaldehyde content of factors because melamine glue contains formaldehyde component;

[0007] 2, impregnated paper, glue and so on will make the plate cost increase;

[0008] 3, melamine board pressing curing process needs high temperature, need to consume a lot of energy;

[0009] 4, melamine board manufacturing equipment price is very expensive, investment difficulty, if directly buy melamine board for flat PET film, melamine board price is higher than the price of fiberboard 0-100 yuan a, will increase the material cost. SUMMARY

[0010] The purpose of the present application is to provide a kind of preparation method and its roll coating equipment of flat PET film of artificial board, to solve the above-mentioned existing flat PET film technology because of using melamine board, and lead to plate formaldehyde content increase, energy consumption increases, overall cost increases and environmental pollution increases etc. Problem, most importantly, it can solve the problem of high cost caused by using melamine board and low production efficiency.

[0011] In order to achieve the above purpose, the present application is realized by the following technical scheme:

[0012] A kind of preparation method of flat PET film of artificial board, it is characterized by including the following steps:

[0013] S1: the double face of artificial board is lightly polished, and plate is prepared;

[0014] S2: the surface of the plate after step S1 is treated is dedusted once;

[0015] S3: roll coating water-based paint on the surface of the plate after step S2 is treated, and the coating amount is 50-70g / m 2 ;

[0016] S4: the surface of the plate after step S3 is treated is dried using infrared lamp to make paint film solidification film;

[0017] S5: the surface of the plate after step S4 is treated is lightly polished;

[0018] S6: the surface of the plate after step S5 is treated is dedusted once;

[0019] S7: roll coating UV sanding primer on the surface of the plate after step S6 is treated, and the coating amount is 20-30g / m 2 ;

[0020] S8: the surface of the plate after step S7 is treated is cured using a gallium lamp and a mercury lamp.

[0021] S9: detecting the surface effect of the board after the treatment in step S8, detecting the filling and flatness of the board surface, and storing the qualified products in the warehouse for use;

[0022] S10: sanding the surface of the qualified board after the detection in step S9, using 320#-400# sandpaper for sanding, and sanding the surface of the primer layer to make the paint film smooth;

[0023] S11: performing one-time dust removal on the surface of the board after the treatment in step S10;

[0024] S12: roll-coating PUR hot melt adhesive on the surface of the board after the treatment in step S11, and uniformly roll-coating the hot melt adhesive;

[0025] S13: quickly pressing and pasting PET film on the surface of the board after the treatment in step S12 and cutting;

[0026] S14: cooling and detecting the surface of the board after the treatment in step S13, and storing in the warehouse.

[0027] Preferably, the following steps are further included between step S9 and step S10:

[0028] A1: sanding the surface of the board that is not qualified in step S9, using 320#-400# sandpaper to make the paint film smooth;

[0029] A2: after sanding the surface of the board after the treatment in step A1, roll-coating UV sanding primer again, and the coating amount is 20-30 g / m 2 ;

[0030] A3: using a gallium lamp and a mercury lamp to perform ultraviolet curing on the surface of the board after the treatment in step A2;

[0031] A4: repeating steps S9 to S14 on the board after the treatment in step A3.

[0032] Preferably, the artificial board is LSB board in high-density fiberboard and particleboard.

[0033] Preferably, the water-based paint is white water-based paint.

[0034] Preferably, the UV sanding primer is constructed by laser roll-coating.

[0035] The application discloses a roller coating device for preparing a flatly-pasted solid-color PET film of a wood-based panel, and belongs to the technical field of wood-based panel production.

[0036] Preferably, the conveying mechanism is composed of a conveying pipe and a discharge pipe.

[0037] Preferably, the feeding mechanism is composed of a first motor, a conveying roller, a belt pulley and a belt.

[0038] Preferably, the roller coating mechanism is composed of an electric push rod, a mounting block, a rotating rod, a coating roller and a second motor.

[0039] The application has the following beneficial effects:

[0040] The application is to directly flatly paste a PET film on a fiberboard after the fiberboard is made into a coating pre-coated fiberboard, instead of flatly pasting a PET film on a melamine board, and the cost of each board is increased by less than 10 yuan from the fiberboard to the coating pre-coated board, and the cost of each melamine pre-coated board is reduced by 70%, and the production efficiency of the coating pre-coated fiberboard is 1 to 2 times higher than that of the melamine pre-coated fiberboard;

[0041] The application can solve the problems of increasing formaldehyde content, increasing energy consumption, increasing overall cost and increasing environmental pollution caused by using melamine boards in the prior art;

[0042] 3、The application can solve the problem of high cost and low production efficiency caused by using melamine boards;

[0043] 4, The preparation method and roller coating equipment of the artificial plate flat paste solid color PET film, through the setting of heating pipe, stirring motor, shaft, stirring rod and temperature detector, the paint in the paint storage tank can be heated and stirred, so that it can be uniformly heated, and the temperature in the paint storage tank is detected by the temperature detector, so as to control the switch of the heating pipe, solve the problem that the paint outlet temperature cannot be effectively controlled, and the paint cannot guarantee a certain viscosity in cold environment. Through the setting of the return pipe and the collecting frame, the paint on the roller coating mechanism can be recycled, and the paint on the coating roller can be homogenized through the action of the collecting frame. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 The preparation method of the artificial plate flat paste solid color PET film is implemented a schematic diagram;

[0045] Figure 2 The preparation method of the artificial plate flat paste solid color PET film is implemented a schematic diagram;

[0046] Figure 3 The preparation method of the artificial plate flat paste solid color PET film is implemented a schematic diagram;

[0047] Figure 4 The preparation method of the artificial plate flat paste solid color PET film is implemented a schematic diagram;

[0048] Figure 5 The preparation method of the artificial plate flat paste solid color PET film is implemented a schematic diagram;

[0049] Figure 6 The preparation method of the artificial plate flat paste solid color PET film is implemented a schematic diagram.

[0050] In the figure: 1, base; 2, feeding mechanism; 3, mounting frame; 4, roller coating mechanism; 5, auxiliary mechanism; 6, paint storage tank; 7, heating pipe; 8, stirring motor; 9, shaft; 10, stirring rod; 11, temperature detector; 12, paint pump; 13, conveying mechanism; 14, return pipe; 15, collecting frame. DETAILED DESCRIPTION

[0051] In order to make the personnel in the technical field better understand the technical solutions of the present application, the product of the present application will be further described in detail below in combination with examples and drawings.

[0052] Unless otherwise defined, 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 application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. EMBODIMENT

[0053] As shown in the figure, a preparation method of a flatly pasted solid color PET film of a wood-based panel, comprising the following steps: Figure 1

[0054] S0: loading the wood-based panel into the production line;

[0055] S1: lightly sanding both sides of the wood-based panel to obtain a panel;

[0056] S2: performing one-time dust removal on the surface of the panel after step S1;

[0057] S3: roll-coating water-based paint on the surface of the panel after step S2, with a coating amount of 50-70 g / m 2 ;

[0058] S4: drying the panel surface after step S3 using an infrared lamp to solidify the paint film into a film;

[0059] S5: lightly sanding the panel surface after step S4;

[0060] S6: performing one-time dust removal on the panel surface after step S5;

[0061] S7: roll-coating UV sanding primer on the panel surface after step S6, with a coating amount of 20-30 g / m 2 ;

[0062] S8: performing ultraviolet curing on the panel surface after step S7 using a gallium lamp and a mercury lamp;

[0063] S9: detecting the panel surface effect after step S8, detecting the filling property and flatness of the panel surface, and storing the qualified products for use;

[0064] S10: sanding the qualified panel after step S9, using 320#-400# sandpaper to sand the surface of the sanding primer layer, so as to make the paint film sanding flat;

[0065] S11: performing one-time dust removal on the panel surface after step S10;

[0066] ​S12: roll-coat PUR hot-melt glue on the surface of the board treated in step S11, and evenly coat the hot-melt glue;

[0067] S13: quickly press and paste PET film on the surface of the board treated in step S12, and cut;

[0068] S14: cool the surface of the board treated in step S13, and detect and store. Embodiment

[0069] As shown in the figure, a preparation method of a flat-pasted solid-color PET film of a wood-based panel includes the following steps: Figure 2

[0070] S0: load the wood-based panel into a production line;

[0071] S1: lightly sand both sides of the wood-based panel to obtain a board;

[0072] S2: perform one-time dust removal on the surface of the board treated in step S1;

[0073] S3: roll-coat water-based paint on the surface of the board treated in step S2, and the coating amount is 50-70 g / m 2 ;

[0074] S4: dry the surface of the board treated in step S3 using an infrared lamp to cure the paint film into a film;

[0075] S5: lightly sand the surface of the board treated in step S4;

[0076] S6: perform one-time dust removal on the surface of the board treated in step S5;

[0077] S7: roll-coat UV sanding primer on the surface of the board treated in step S6, and the coating amount is 20-30 g / m 2 ;

[0078] S8: use a gallium lamp and a mercury lamp to perform ultraviolet curing on the surface of the board treated in step S7;

[0079] S9: detect the surface of the board treated in step S8, detect the filling property and flatness of the board surface, and store the qualified products;

[0080] S10: sand the board that fails the detection in step S9, and use 320#-400# sandpaper to sand the paint film to be flat;

[0081] S11: after sanding the surface of the board treated in step S10, roll-coat UV sanding primer again, and the coating amount is 20-30 g / m 2 ; ​

[0082] S12: UV curing is performed on the surface of the board treated in step S11 using a gallium lamp and a mercury lamp;

[0083] S13: The surface effect of the board treated in step S12 is detected, and the filling and flatness of the surface are detected; qualified products are stored for sanding, sanding uses 320#-400# sandpaper, and the surface of the sanding primer layer is sanded to make the paint film sanded and flat; unqualified products repeat steps S10 to S13;

[0084] S14: Dust removal is performed on the surface of the board treated in step S13;

[0085] S15: After the board treated in step S14 is roll-coated with PUR hot melt adhesive, the hot melt adhesive is uniformly roll-coated;

[0086] S16: The surface of the board treated in step S15 is quickly pressed and pasted with PET film and cut;

[0087] S17: The surface of the board treated in step S16 is cooled and detected, and is stored.

[0088] It should be noted that the preparation method of the artificial board pasted with the solid color PET film, the artificial board uses LSB board in high-density fiberboard and particle board, such board has high density and good deformation resistance. At the same time, the flatness of the board itself is good, and it is relatively easier to fill and smooth during the painting process; the water-based paint uses white water-based paint, the white water-based paint has high solid content and good filling property, and under the same conditions, the resin or emulsion content is relatively low, the water and cosolvent are released quickly, which is beneficial to the drying and film formation of the paint film, and the coating amount of the water-based paint is controlled at 50-70 g / m 2 , too high coating amount, incomplete volatilization, too low filling property, of course, a thin coating multi-pass process can also be used, that is, reducing the coating amount of a single pass and increasing a coating pass; the UV sanding primer is constructed by laser roll coating, the leveling property of the paint is good, the flatness of the board surface after curing and film formation is high, and the filling property is good, so that the board surface is more smooth after sanding; the unqualified products in step ten and the unqualified products of the pasted PET film in step S13 of example one or step S16 of example two can be reduced, if positive and reverse roll coating is used, although the filling and flatness are also good, but the head phenomenon will occur, even if the sanding is repeated, the head paint cannot be sanded and smoothed, which will affect the subsequent pasting of the PET film; if single roll and double roll construction is used, the flatness of the paint film is poor, it is difficult to sand and smooth, and the uneven treatment of the board surface will easily produce bubbles when the PET film is pasted, which will increase the unqualified rate.

[0089] For example Figures 3 to 6As shown, a kind of roll coating equipment for the preparation method of the artificial board flatly pasted solid color PET film as described above, including base 1, the top of base 1 is fixedly installed with feeding mechanism 2, feeding mechanism 2 is made of first motor, conveying roller, belt pulley and belt, the right end of base 1 is fixedly installed with mounting bracket 3, the inner side top of mounting bracket 3 is fixedly installed with roll coating mechanism 4, roll coating mechanism 4 is made of electric push rod, mounting block, rotating rod, coating roller and second motor, the inner side lower part of mounting bracket 3 is fixedly installed with auxiliary mechanism 5, the rear end right side of base 1 is fixedly installed with paint storage tank 6, the inside bottom of paint storage tank 6 is fixedly installed with a plurality of heating pipes 7, the top middle of paint storage tank 6 is fixedly installed with stirring motor 8, the power output end of stirring motor 8 is fixedly installed with rotating shaft 9, a plurality of stirring rods 10 are fixedly installed on the outer wall of rotating shaft 9, temperature detector 11 is fixedly installed on the top of paint storage tank 6, paint storage tank 6 is fixedly installed with return pipe 14, one end of return pipe 14 is fixedly connected with collection frame 15, collection frame 15 is fixedly installed on the left end of roll coating mechanism 4, paint pump 12 is fixedly installed on the right end of paint storage tank 6, the discharge end of paint pump 12 is fixedly connected with conveying mechanism 13, conveying mechanism 13 is made of conveying pipe and discharge pipe, and conveying mechanism 13 is fixedly installed on the top of mounting bracket 3.

[0090] The use method and advantages of the present application: when the plate UV automatic roll coating equipment is used, the working process is as follows:

[0091] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, when the plate UV automatic roll coating equipment is used, first, the electrical equipment in the plate UV automatic roll coating equipment is connected with external power supply and controller, the paint in the paint storage tank 6 is heated by heating pipe 7, and at the same time, the rotating shaft 9 and stirring rod 10 are rotated to stir by stirring motor 8, then the paint in the paint storage tank 6 is pumped out by paint pump 12, and conveyed to the coating roller of roll coating mechanism 4 by conveying mechanism 13, and the excess paint of coating roller is collected by collection frame 15, and the paint on the coating roller is scraped evenly, then the inside of paint storage tank 6 is conveyed by return pipe 14, and the plate is placed on feeding mechanism 2, conveyed by feeding mechanism 2, and then roll coated by roll coating mechanism 4.

[0092] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form; any person skilled in the art can easily implement the present application according to the drawings and the above description; however, any person skilled in the art can make some changes, modifications and equivalent changes of the above disclosed technical contents without departing from the technical solution of the present application, and the equivalent embodiments of the present application are still within the protection scope of the present application.

Claims

1. A method for preparing a flat-laminated solid-color PET film for a wood-based panel, characterized by: It comprises the following steps: S1: light polishing on both sides of the artificial board to obtain the board; S2: once dust removal on the surface of the board after step S1; S3: roll-coating water-based paint on the surface of the plate material treated in step S2, with a coating amount of 50-70 g / m 2 ; S4: drying on the surface of the board after step S3 using infrared lamp to make the paint film solidified into film; S5: light polishing on the surface of the board after step S4; S6: once dust removal on the surface of the board after step S5; S7: roll-coating UV sanding primer on the surface of the plate treated in step S6, with a coating amount of 20-30 g / m 2 ; S8: UV curing on the surface of the board after step S7 using a gallium lamp and a mercury lamp; S9: effect detection on the surface of the board after step S8, detecting the filling and flatness of the board surface, and the qualified products are stored for use; S10: sanding on the surface of the qualified board after step S9, using 320#-400# sandpaper to sand the surface of the primer layer to make the paint film sanding flat; S11: once dust removal on the surface of the board after step S10; S12: roll coating of PUR hot melt adhesive on the surface of the board after step S11, and the hot melt adhesive is roll coated uniformly S13: rapid pressing and pasting of PET film on the surface of the board after step S12 and cutting; S14: cooling and detection on the surface of the board after step S13, and storage.

2. The method for preparing the artificial board flatly pasted solid color PET film according to claim 1, characterized in that: Between step S9 and step S10, there are also the following steps: A1: sanding on the surface of the unqualified board after step S9, using 320#-400# sandpaper to make the paint film sanding flat; A2: After sanding the surface of the plate treated in step A1, the UV sanding primer is applied again by roller coating, and the coating amount is 20-30 g / m 2 ; A3: UV curing on the surface of the board after step A2 using a gallium lamp and a mercury lamp; A4: repeating steps S9 to S14 on the board after step A3.

3. The method for preparing the artificial board flatly pasted solid color PET film according to claim 2, characterized in that: The artificial board uses high-density fiberboard and LSB board in the particle board.

4. The method for preparing the artificial board flatly pasted solid color PET film according to claim 3, characterized in that: The water-based paint uses white water-based paint.

5. The method for preparing the artificial board flatly pasted solid color PET film according to claim 4, characterized in that: The UV sanding primer uses laser roll coating construction.

6. A roll coating apparatus for the production of a flat veneered solid color PET film according to any one of claims 1-5, comprising a base, characterized in that: The top end of the base is fixedly installed with a feeding mechanism, the right end of the base is fixedly installed with a mounting rack, the inner top end of the mounting rack is fixedly installed with a roll coating mechanism, the inner lower part of the mounting rack is fixedly installed with an auxiliary mechanism, the rear right side of the base is fixedly installed with a paint storage tank, the inside bottom end of the paint storage tank is fixedly installed with a plurality of heating pipes, the top middle part of the paint storage tank is fixedly installed with a stirring motor, the power output end of the stirring motor is fixedly installed with a rotating shaft, the outer wall of the rotating shaft is fixedly installed with a plurality of stirring rods, the top end of the paint storage tank is fixedly installed with a temperature detector, the top end of the paint storage tank is fixedly installed with a return pipe, one end of the return pipe is fixedly connected with a collection frame, the collection frame is fixedly installed at the left end of the roll coating mechanism, the right end of the paint storage tank is fixedly installed with a paint pump, the discharge end of the paint pump is fixedly connected with a conveying mechanism, and the conveying mechanism is fixedly installed at the top end of the mounting rack.

7. The roll coating apparatus for the production method of the artificial board flatly pasted solid color PET film according to claim 6, characterized in that: The conveying mechanism is composed of a conveying pipe and a discharge pipe.

8. The roll coating apparatus for the production method of the artificial board flatly attached with the solid color PET film according to claim 6, characterized in that: The feeding mechanism is composed of a first motor, a conveying roller, a belt pulley and a belt.

9. The roll coating apparatus for the production method of the artificial board flatly attached with the solid color PET film according to claim 6, characterized in that: The roll coating mechanism is composed of an electric push rod, a mounting block, a rotating rod, a coating roller and a second motor.

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