CN111822302A - Side edge coating process for wooden plain door leaf - Google Patents
Side edge coating process for wooden plain door leaf Download PDFInfo
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- CN111822302A CN111822302A CN202010730971.7A CN202010730971A CN111822302A CN 111822302 A CN111822302 A CN 111822302A CN 202010730971 A CN202010730971 A CN 202010730971A CN 111822302 A CN111822302 A CN 111822302A
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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
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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
- 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
- B05D3/12—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 mechanical means
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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
- B05D7/50—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)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The application discloses technology is covered with paint to wooden plain end door leaf side includes following process steps in proper order: step 1, sanding the surface; step 2, surface dust removal; step 3, vertically rolling UV putty to form a UV putty paint film layer; step 4, sanding the dried UV putty paint film layer; step 5, vertically rolling a UV primer to form a UV primer paint film layer; step 6, sanding the dried UV primer paint film layer; and 7, vertically rolling UV finish paint to form a UV finish paint film layer. The method can obtain relatively good paint film thickness, simultaneously relieve and even avoid the problems of uneven paint film thickness and unstable paint film performance caused by the phenomenon of vertical sagging to a certain extent, simultaneously avoid the problem of bubbling to a certain extent, and improve the fullness and glossiness of the paint film.
Description
Technical Field
The application relates to the technical field of wood door leaf coating, in particular to a process for coating the side edge of a wood plain door leaf.
Background
The side of the wooden plain door leaf is easily affected by the temperature and humidity of the environment, and causes the problems of corner cracking, surface layer peeling and the like caused by dry shrinkage and wet expansion. Paint is coated on the side edge of the wooden plain door leaf, so that the problems can be effectively avoided, and the service life of the side edge of the door leaf is prolonged. In the prior art, the painting process of the side edge of the wooden plain door leaf mainly comprises Polyurethane (PU) coating, unsaturated Polyester (PE) coating and ultraviolet light curing (UV) coating. The polyurethane coating (PU) has the advantages of good paint film adhesion, high hardness and good toughness when being coated; the unsaturated polyester coating (PE) has the advantages of capability of forming a relatively thick paint film at one time, good hole filling performance and good paint film performance. However, both of them are only suitable for spraying process, and have problems of large volatilization amount of paint, environmental pollution, etc. during coating process. For this reason, the major finishing process in the market today is the ultraviolet light curing (UV) coating. The ultraviolet curing coating (UV) has the advantages of extremely low discharge of VOCs and other atmospheric pollutants, environmental protection, high drying speed and the like.
For example, chinese patent CN 201310155380.1 discloses a vertical roll coater for a side edge of a plain door leaf, which is sequentially provided with a feeding mechanism, a sanding mechanism, a dust removing mechanism, a vertical roll coating (UV paint) mechanism, and a drying (UV curing) mechanism, so that the roll coater can perform UV coating on the side edge of a wooden plain door leaf according to coating processes of feeding, sanding treatment of the side surface of the door leaf, surface dust removing treatment, vertical roll coating of UV paint, and UV curing treatment. By utilizing the processing device and the coating process thereof, the problems caused by the spraying process can be avoided to a certain extent.
However, in actual practice, since the UV paint coating is applied by vertical roll coating, the paint inevitably suffers from vertical sagging, especially when relatively thick paint film coatings are applied for relatively good finish and wear resistance. The vertical sagging phenomenon also causes the problems of uneven paint film thickness and unstable paint film performance, and simultaneously, the processing device and the coating process thereof also have the problems of bubbling, insufficient paint film fullness and glossiness.
Disclosure of Invention
The technical purpose of the application is to overcome the technical problems, so that the side edge coating process for the wooden plain door leaf is provided, the problems of uneven paint film thickness and unstable paint film performance caused by the phenomenon of vertical sagging can be relieved or even avoided to a certain extent while relatively good paint film thickness is obtained, bubbling can be avoided to a certain extent, and the fullness and glossiness of the paint film are improved.
In order to realize the technical purpose of the application, the application discloses a process for coating the side edge of a wooden plain door leaf, which sequentially comprises the following process steps:
step 1, sanding the surface;
step 2, surface dust removal;
step 3, vertically rolling UV putty to form a UV putty paint film layer;
step 4, sanding the dried UV putty paint film layer;
step 5, vertically rolling a UV primer to form a UV primer paint film layer;
step 6, sanding the dried UV primer paint film layer;
and 7, vertically rolling UV finish paint to form a UV finish paint film layer.
By means of the method, the UV paint layer is vertically coated for three times, three paint film layers (a UV putty paint film layer, a UV primer paint film layer and a UV finish paint film layer) are formed on the side edge of the door leaf, and the surface paint layer is coated for three paint film layers to reduce the coating amount of the UV paint at each time, so that the vertical sagging phenomenon can be relieved or even avoided under the condition that the surface paint layers with the same total thickness are obtained, and the problems of uneven paint film thickness and unstable paint film performance caused by the vertical sagging phenomenon are relieved or even avoided. The problem of bubbling can also be avoided more effectively by reducing the coating weight of the UV paint each time.
Meanwhile, the inventor finds that the reasons that the fullness and the glossiness of a paint film are relatively poor when the UV paint is vertically coated are mainly two reasons, namely, the first is that the vertical sagging causes secondary leveling (the sagging part of the paint flows onto the lower UV paint layer under the action of gravity) before the UV paint is cured to form the UV paint film, so that the fullness and the glossiness of the finally formed UV paint film layer are influenced; secondly, the thickness of a single UV paint film layer is relatively thick, the light transmittance is relatively poor, and the fullness and the glossiness of the finally formed UV paint film layer are influenced.
According to the technical scheme, firstly, the secondary leveling of the UV paint before the UV paint film is formed by curing is relieved or even avoided by reducing the coating amount of the UV paint every time, so that the fullness and the glossiness of the surface paint layer formed finally are improved; secondly, when the surface paint layer is divided into three paint film layers of a UV putty paint film layer, a UV primer paint film layer and a UV finishing paint film layer, after the coating and curing of the previous paint film layer are finished, sanding treatment is carried out to enable the previous paint film layer to be more fine and smooth, so that the fullness and the glossiness of the finally formed surface paint layer are improved.
Preferably, the step 5 comprises the following substeps in sequence:
step 5-1, vertically rolling a first UV primer;
step 5-2, semi-curing and drying the first UV primer paint film layer;
5-3, vertically rolling a second UV primer;
step 5-4, semi-curing and drying the second UV primer paint film layer;
5-5, vertically rolling a third UV primer;
and 5-6, fully curing and drying the third UV primer paint film layer.
In the technical scheme, the first UV primer paint film layer, the second UV primer paint film layer and the third UV primer paint film layer are coated in a stacking mode for a plurality of times, so that the final UV primer paint film layer is formed, and the phenomenon of vertical sagging of a single uncured paint layer can be further relieved or even avoided.
Preferably, in the step 5-1, the step 5-3 and the step 5-5, the coating amount of the UV primer is 25 to 35g/m2。
Preferably, in the step 5-3, after the second UV primer is vertically roll-coated, the second UV primer coating is roll-coated by a roll.
In the technical scheme, the second UV primer paint film layer is rolled by the compression roller, so that redundant UV primers can be effectively removed, the coating amount of the second UV primer is particularly reduced and controlled, the second UV primer is uniformly coated without sagging, and the paint film adhesive force of the finally formed UV primer paint film layer can be improved.
Preferably, the rolling pressure of the press roller on the second UV primer paint film layer is 0.01-0.03 MPa.
Preferably, the compression roller is a steel roller and comprises a cylindrical compression roller main body and a pair of annular bosses formed at two axial ends of the compression roller main body; when the press roller rolls the second UV primer coating, the side edge of the door leaf is abutted against the press roller main body, and the chamfer of the door leaf is positioned between the press roller main body and the annular boss.
In this technical scheme, through the setting of a pair of annular boss, can extrude the junction of compression roller main part and annular boss with the unnecessary UV priming paint of roll extrusion in the second UV priming paint rete, contact through piling up the unnecessary UV priming paint in compression roller main part and annular boss junction and the chamfer of door leaf on the surface, make unnecessary UV priming paint attach to the surface of chamfer, and under the dead weight effect, the levelling forms the paint film on the surface of chamfer, and remaining UV priming paint is retained on the compression roller under the dead weight effect, and accessible prior art arbitrary one kind coating recovery system retrieves and reuse.
Therefore, the UV paint film can be formed on the surface of the chamfer to form transition with the upper surface and the lower surface of the door leaf, but the thickness of the UV paint film is relatively small, so that the problems of paint collapse, cracking and the like easily caused by the fact that the paint film is too thick at the chamfer in the using process in the prior art can be effectively solved.
Preferably, in the step 5-3, after the second UV primer coating layer is rolled using a press roller, the chamfer is rolled using a smoothing roller.
Preferably, the leveling roller comprises a cylindrical leveling roller body, a pair of rolling ring tables formed at two end portions of the leveling roller body, and a connecting boss connecting the leveling roller body and the rolling ring tables, the rolling ring tables are provided with ring table surfaces matched with the chamfers, and when the ring table surfaces abut against the chamfers, the connecting bosses abut against parts of the side edges.
Preferably, the step 7 comprises the following substeps in sequence:
7-1, vertically rolling a first UV finish;
7-2, semi-curing and drying the first UV finish paint film layer;
7-3, vertically rolling a second UV finish;
and 7-4, fully curing and drying the second UV finish paint film layer.
In the technical scheme, the first UV finish paint film layer and the second UV finish paint film layer are coated in a stacking way in a mode of less coating and more times to form the final UV finish paint film layer, so that the phenomenon of vertical sagging of a single uncured paint layer can be further relieved or even avoided.
Preferably, in the step 7-1 and the step 7-3, the coating weight of the UV finishing coat is 20-30 g/m2。
Preferably, in the step 6, the side edge adopts 320#Sanding with sand paper.
In this technical scheme, through the sand paper that uses different density to the side of door leaf and chamfer to carry out abundant and sand light effectively respectively to the side of door leaf, chamfer, and through the abundant sand light to the UV priming paint layer, can improve the fullness and the glossiness that finally form in the paint film of door leaf side effectively.
Preferably, in the step 7, a composite soft roller is adopted for roller coating of the UV finish, the composite soft roller is a circular truncated cone-shaped roller, and an included angle alpha between the edge of the composite soft roller and the axis of the composite soft roller is 1-1.5 degrees; the composite soft roller is sequentially divided into a first roller section, a second roller section and a third roller section from top to bottom along the length direction of the composite soft roller, the diameters of the first roller section, the second roller section and the third roller section are sequentially reduced, the hardness of the first roller section is 0.92-0.95 times of that of the third roller section, and the hardness of the second roller section is 0.95-0.98 times of that of the third roller section.
In the technical scheme, the material hardness of the first roller section, the second roller section and the third roller section is matched with the included angle alpha value of the edge of the composite soft roller and the axis of the composite soft roller, so that when the composite soft roller is used for roller coating of UV finish paint, the first roller section, the second roller section and the third roller section are pressed against the side edge of the door leaf by different extrusion deformation amounts, and the UV finish paint is roller coated on the upper part of the side edge which is vertically roller coated by relatively larger pressure than the lower part due to the gradual increase of the material hardness of the first roller section, the second roller section and the third roller section, so that the transverse (feeding direction) passive leveling of the UV finish paint coated on the upper part of the side edge which is vertically roller coated is promoted. Therefore, the vertical sagging problem in the UV finishing paint coating process can be effectively relieved or even avoided on one hand, and the paint film ductility of the finally formed UV finishing paint film layer can be improved on the other hand.
Preferably, between the step 6 and the step 7, a step of color correction processing is further included.
In conclusion, according to the side coating process for the wooden plain door leaf, which is disclosed by the technical scheme of the application, the problems of uneven paint film thickness and unstable paint film performance caused by the phenomenon of vertical sagging can be relieved or even avoided to a certain extent while a relatively good paint film thickness is obtained, the problem of bubbling can be avoided to a certain extent, and the fullness and glossiness of the paint film are improved.
Further, a relatively thin paint layer can be formed on the surface of the chamfer of the door leaf, so that the problems of paint collapse, cracking and the like easily caused by the fact that the paint film at the chamfer is too thick in the using process are avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic structural view of a side of a door leaf according to embodiments 1 and 2 of the present application;
FIG. 2 is a schematic view showing a treatment state of rolling of a press roll of example 3 of the present application;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a schematic view showing a processing state of a leveling roller according to embodiment 4 of the present application;
FIG. 5 is a schematic layout view of a press roll and a leveling roll in embodiment 4 of the present application;
FIG. 6 is a schematic view showing the structure of a composite soft roll according to example 5 of the present application;
FIG. 7 is a schematic view showing the processing state of the composite soft roll according to example 5 of the present application.
In the drawings: 100-press roll, 110-press roll main body, 120-annular boss, 200-leveling roll, 210-leveling roll body, 220-press roll ring table, 230-connecting boss, 300-door leaf, 310-side edge, 320-chamfer, 400-composite soft roll, 410-first roll section, 420-second roll section, 430-third roll section, 500-UV putty paint film layer, 600-UV primer paint film layer and 700-UV finish paint film layer.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1: referring to fig. 1, a process for coating the side edge of a wooden flat door leaf sequentially comprises the following steps:
step 1, sanding the surface, sanding the side 310 of the door leaf 300 by a side sander to remove burrs on the surface of the side 310, sanding the upper and lower chamfers 320 by sanding, and sanding the side 310 with 180 mesh sandpaper#The number of sandpaper used for sanding the chamfer 320 is 240#；
Step 2, surface dust removal, wherein a hairbrush and a dust removal system are adopted for dust removal so as to sweep away residual dust particles after sanding;
step 3, vertically rolling UV putty, wherein the UV putty is preferably transparent UV putty, and the coating amount is 25-35 g/m2(e.g., 30 g/m)2) Sealing the edge hole, and performing double-lamp full curing drying by using a mercury lamp and a gallium lamp;
step 4, sanding the dried UV putty paint film layer, and sanding the dried UV primer paint film layer through a side sanding machine, wherein the mesh number of the adopted sandpaper is 240#；
Step 5, vertically rolling UV primer, wherein the coating amount is 70-100 g/square meter (for example, 85 g/m)2) And carrying out double-lamp full curing and drying by using a mercury lamp and a gallium lamp;
6, sanding the dried UV primer paint film layer, and sanding the dried UV primer paint film layer through a side sanding machine, wherein the mesh number of the adopted sandpaper is 320#；
Step 7, vertically rolling UV (ultraviolet) finish paint, wherein the coating weight is 40-60 g/square meter (for example, 50 g/m)2) And carrying out double-lamp full curing and drying by using a mercury lamp and a gallium lamp to form a UV finish paint film layer. Packaging and warehousing after quality inspection.
In this embodiment, through with the perpendicular coating of UV lacquer layer cubic, form three lacquer rete (UV putty lacquer rete, UV priming paint rete, UV finish paint rete) at the side of door leaf to reduce UV lacquer coating weight at every turn, thereby can alleviate, even avoid the appearance of vertical sagging phenomenon under the condition that obtains the same surface paint layer of gross thickness, and then alleviate, even avoid the problem that the paint film thickness that it brought is uneven, the paint film performance is unstable. Meanwhile, the bubbling problem can be effectively avoided.
Meanwhile, the secondary leveling of the UV paint before the UV paint film is formed by curing is relieved or even avoided by reducing the coating amount of the UV paint every time, so that the fullness and the glossiness of the surface paint layer formed finally are improved; secondly, when the surface paint layer is divided into three paint film layers of a UV putty paint film layer, a UV primer paint film layer and a UV finish paint film layer, after the coating and curing of the previous paint film layer are finished, sanding treatment is needed, and particularly, a proper sanding process (the mesh number of selected sand paper) is matched, so that the UV putty paint film layer and the UV primer paint film layer can be fully sanded, the previous paint film layer is more fine and smooth, and the fullness and glossiness of the finally formed surface paint layer are improved in this respect.
In particular, the coating material is inevitably dropped due to the influence of gravity, and therefore, in the present embodiment, all the vertical roll coating units are provided with a paint recirculation system mainly including a paint storage box, an oil pump, a spray pipe, a scraper, and the like.
Preferably, after step 6 and before step 7, a step of color correction processing is further included. The door leaves with the different coating effect of the side edges 310 from the actual template requirement are manually selected, and color correction is performed by manual spraying or machine spraying, so that the uniform coating effect of the side edges 320 is ensured and the template requirement is met.
Example 2: embodiment 2 differs from embodiment 1 in that the following substeps are included in order in step 5:
step 5-1, vertically rolling a first UV primer, wherein the coating weight of the first UV primer is 25-35 g/m2(e.g., 30 g/m)2)；
Step 5-2, semi-curing and drying the first UV primer paint film layer, and performing single-lamp semi-curing and drying by using a mercury lamp, wherein the drying energy is 120-180 mJ/cm2(e.g., 100 mJ/cm)2)；
And 5-3, vertically rolling a second UV primer, wherein the coating weight of the second UV primer is 25-35 g/m2(e.g., 30 g/m)2)；
And 5-4, semi-curing and drying the second UV primer paint film layer, and performing single-lamp semi-curing and drying by using a mercury lamp, wherein the drying energy is 120-180 mJ/cm2(e.g., 100 mJ/cm)2)；
And 5-5, vertically rolling a third UV primer, wherein the coating weight of the third UV primer is 25-35 g/m2(e.g., 30 g/m)2)；
And 5-6, fully curing and drying the third UV primer paint film layer, and performing double-lamp full curing and drying by using a mercury lamp and a gallium lamp, wherein the drying energy is 250-300 mJ/cm2(e.g., 270 mJ/cm)2)。
Meanwhile, the following substeps are included in sequence in step 7:
7-1, vertically rolling a first UV finish coat, wherein the coating weight of the first UV finish coat is 20-30 g/m2(e.g., 25 g/m)2)；
And 7-2, semi-curing and drying the first UV finish paint film layer, and performing single-lamp semi-curing and drying by using a mercury lamp, wherein the drying energy is 120-180 mJ/cm2(e.g., 100 mJ/cm)2)；
7-3, vertically rolling a second UV finishing coat, wherein the coating weight of the second UV finishing coat is 20-30 g/m2(e.g., 25 g/m)2)；
And 7-4, fully curing and drying the second UV finish paint film layer, and performing double-lamp full curing and drying by using a mercury lamp and a gallium lamp, wherein the drying energy is 250-300 mJ/cm2(e.g., 270 mJ/cm)2)。
In the embodiment, the first UV primer paint film layer, the second UV primer paint film layer and the third UV primer paint film layer are coated in a stacked manner in a few-coating and multiple-pass manner to form the final UV primer paint film layer, and the first UV topcoat paint film layer and the second UV topcoat paint film layer are coated in a stacked manner, so that the phenomenon of vertical sagging of a single uncured paint layer can be further alleviated or even avoided.
Example 3: example 3 is different from example 2 in that, as shown in fig. 2 and 3, after the second UV primer is vertically roll-coated in step 5-3, the second UV primer coating layer is roll-processed by a roll 100. Wherein the rolling pressure is 0.01 to 0.03MPa (e.g., 0.02 MPa).
In this embodiment, the second UV primer paint film layer is rolled by the press roller, so that the excess UV primer can be removed more effectively, especially, the coating amount of the second UV primer paint is reduced and controlled, the second UV primer paint is uniformly coated without sagging, and the paint film adhesion of the finally formed UV primer paint film layer can be improved.
Preferably, the pressure roller 100 is a steel roller, is an unpowered roller, and includes a cylindrical pressure roller main body 110, and a pair of annular bosses 120 formed at both axial ends of the pressure roller main body 110; when the press roller 100 performs the roll processing on the second UV primer coating, the side 310 of the door leaf 300 abuts against the press roller main body 110, and the chamfer 320 of the door leaf 300 is located between the press roller main body 110 and the annular boss 120. The pressing roller 100 moves relative to the side 310 by the abutting force with the side 310 and the feeding tendency of the door 300.
Through the setting of a pair of annular boss, can extrude the unnecessary UV priming paint coating of roll extrusion in the second UV priming paint coating film layer to the junction of compression roller main part 110 and annular boss 120, contact through piling up the unnecessary UV priming paint coating of compression roller main part 110 and annular boss 120 junction and the chamfer 320 surface of door leaf 300, make unnecessary UV priming paint coating adhere to the surface of chamfer 320, and under the effect of UV priming paint dead weight, the levelling forms the paint film on the surface of chamfer 320, and remaining UV priming paint coating is retained on compression roller 100 under the effect of dead weight, and can retrieve and reuse through paint circulation system. Thereby, the UV paint film can be formed on the surface of the chamfer 320 to form a transition with the upper and lower surfaces of the door 300, but the thickness of the UV paint film is relatively small. Therefore, compared with the prior art in which the chamfer of the door leaf is processed by a uniform process, for example, the chamfer is coated while the side edge of the door leaf is vertically coated, a relatively thin paint film layer can be formed, so that the problems of paint chipping, cracking and the like easily occurring in the use process due to the excessively thick paint film at the chamfer 320 can be effectively avoided.
Preferably, the annular projection 120 is in linear contact with the chamfer 320, so that the arc B of the chamfer 320 between the roll body 110 and the annular projection 120 accounts for 80% of the total arc of the chamfer 320. Thereby effectively preventing the lacquering treatment of the chamfer 320 from affecting the upper and lower surfaces of the door 300.
In step 6, the side 310 adopts 320#Sanding with sand paper, chamfering 320 with 400#Sanding with sand paper. Also as a further preference, in step 7-1, the first UV topcoat layer is subjected to the same rolling treatment using a press roll 100.
Example 4: example 3 is different from example 2 in that, as shown in fig. 4, after the second UV primer coating layer is rolled using a press roller 100, a chamfer 320 is roll-processed using a leveling roller 200 in step 5-3.
Preferably, the leveling roller 200 includes a leveling roller body 210 having a cylindrical shape, a pair of rolling ring stages 220 formed at both ends of the leveling roller body 210, and a connection boss 230 connecting the leveling roller body 210 and the rolling ring stages 220, the rolling ring stages 220 having ring lands fitted with the chamfers 320, and the connection boss 230 abutting against portions of the side edges 210 when the ring lands abut against the chamfers 320. In particular, the connection boss 230 is in contact abutment (i.e. no pressure contact) with the side edge 210.
Referring to fig. 5, the smoothing roller 200 is a non-pressure roller, which is disposed in sequence with the pressure roller 100 in the feeding direction of the door leaf 300.
Example 5: example 5 differs from example 4 in that, as shown in fig. 6, in step 7, particularly in step 7-1 and step 73, the paint roller used for vertical coating is a composite soft roller 400. Wherein, the composite soft roller 400 is a rubber roller in the shape of a circular truncated cone, and the included angle alpha between the edge of the rubber roller and the axis of the rubber roller is 1-1.5 degrees; the composite soft roller 400 is sequentially divided into a first roller section 410, a second roller section 420 and a third roller section 430 from top to bottom along the length direction of the composite soft roller, and the diameters of the first roller section 410, the second roller section 420 and the third roller section 430 are sequentially reduced. In this embodiment, the first roller section 410, the second roller section 420, and the third roller section 430 are 1/3 of the total length of the composite soft roller 400, respectively. The hardness of the first roller section 410 is 0.92-0.95 times of the hardness of the third roller section 430, and the hardness of the second roller section 420 is 0.95-0.98 times of the hardness of the third roller section 430. When the vertical roll coating is performed, the composite soft roll 400 is vertically disposed.
In this embodiment, the ratio between the hardness of the materials of the first roller section 410, the second roller section 420 and the third roller section 430 is defined, and is matched with the definition of the angle alpha between the edge of the composite soft roller 400 and the axis thereof, therefore, when the composite soft roller 400 of the embodiment vertically rolls and coats the UV finish paint, the first roller section 410, the second roller section 420 and the third roller section 430 are pressed against the side edge of the door leaf by different extrusion deformation amounts, and since the hardness of the materials of the first roller section 410, the second roller section 420 and the third roller section 430 is gradually increased, such that the upper portions of the vertically rolled side edges 320 are roll coated with a UV top coating at a relatively greater pressure than the middle portions and the middle portions are roll coated with a relatively greater pressure than the lower portions, to promote lateral (feed direction) passive leveling of the UV topcoat applied to the top and middle of the vertical roll coated sides 310. Therefore, the vertical sagging problem in the UV finishing paint coating process can be effectively relieved or even avoided on one hand, and the paint film ductility of the finally formed UV finishing paint film layer can be improved on the other hand.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The side edge coating process for the wooden plain door leaf is characterized by sequentially comprising the following process steps of:
step 1, sanding the surface;
step 2, surface dust removal;
step 3, vertically rolling UV putty;
step 4, sanding the dried UV putty paint film layer;
step 5, vertically rolling UV primer;
step 6, sanding the dried UV primer paint film layer;
and 7, vertically rolling UV finish paint.
2. The process for finishing the side of a wooden flat door leaf according to claim 1, wherein the step 5 comprises the following substeps in sequence:
step 5-1, vertically rolling a first UV primer;
step 5-2, semi-curing and drying the first UV primer paint film layer;
5-3, vertically rolling a second UV primer;
step 5-4, semi-curing and drying the second UV primer paint film layer;
5-5, vertically rolling a third UV primer;
and 5-6, fully curing and drying the third UV primer paint film layer.
3. The process for coating the side of a wooden flat door leaf according to claim 2, wherein the UV primer is applied in an amount of 25 to 35g/m in each of the steps 5 to 1, 5 to 3, and 5 to 52。
4. The process for coating the side of the wooden flat door leaf according to claim 2, wherein in the step 5-3, after the second UV primer is vertically coated, the second UV primer coating is rolled by a roller (100).
5. The process for coating the side of the wooden flat door leaf according to claim 4, wherein the rolling pressure of the press roll (100) on the second UV primer paint film layer is 0.01-0.03 MPa.
6. The process for coating the side of the wooden flat door leaf according to claim 4, wherein the compression roller (100) is a steel roller, and comprises a compression roller main body (110) having a cylindrical shape, and a pair of annular bosses (120) formed at both axial ends of the compression roller main body (110); when the press roller (100) rolls the second UV primer coating, the side (310) of the door leaf (300) abuts against the press roller main body (110), and the chamfer (320) of the door leaf (300) is located between the press roller main body (110) and the annular boss (120).
7. The process for finishing the side of a wooden flat door leaf according to claim 1, characterized in that the step 7 comprises the following substeps in sequence:
7-1, vertically rolling a first UV finish;
7-2, semi-curing and drying the first UV finish paint film layer;
7-3, vertically rolling a second UV finish;
and 7-4, fully curing and drying the second UV finish paint film layer.
8. The side finishing process for the wooden flat door leaf according to claim 7, wherein the UV topcoat is applied in an amount of 20-30 g/m in each of the steps 7-1 and 7-32。
9. The process for finishing the side of a wooden flat door leaf as claimed in claim 6, wherein in the step 6, 320 is adopted for the side (310)#Sanding with sand paper.
10. The side edge coating process of the wooden flat door leaf according to claim 1, wherein in the step 7, a composite soft roller (400) is adopted for roll coating of UV finish, the composite soft roller (400) is a circular truncated cone-shaped roller, and the included angle alpha between the edge of the composite soft roller and the axis of the composite soft roller is 1-1.5 degrees; the composite soft roller (400) is sequentially divided into a first roller section (410), a second roller section (420) and a third roller section (430) from top to bottom along the length direction of the composite soft roller, the diameters of the first roller section (410), the second roller section (420) and the third roller section (430) are sequentially reduced, the hardness of the first roller section (410) is 0.92-0.95 times of that of the third roller section (430), and the hardness of the second roller section (420) is 0.95-0.98 times of that of the third roller section (430).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113070972A (en) * | 2021-04-06 | 2021-07-06 | 嵊州市艺匠木艺股份有限公司 | Automatic coating method for paint on side surface of aluminum-wood composite board |
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| CN113070972A (en) * | 2021-04-06 | 2021-07-06 | 嵊州市艺匠木艺股份有限公司 | Automatic coating method for paint on side surface of aluminum-wood composite board |
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Address after: Longpan road Xuanwu District of Nanjing city of Jiangsu Province, No. 159 210037 Applicant after: NANJING FORESTRY University Applicant after: Feilinger Home Technology Co., Ltd Address before: No. 7001 Linhai Highway, Fengxian District, Shanghai 201400 Applicant before: Flinger Home Technology Co.,Ltd. Applicant before: Nanjing Forestry University |
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