阅读说明：本技术 一种基于3d打印技术的木质地板双面涂饰方法 (Wood floor double-sided coating method based on 3D printing technology ) 是由 姜俊 吴忠其 杨旭 翁园园 吴丽虹 吴玉琪 冯燕飞 于 2020-06-02 设计创作，主要内容包括：本申请公开了一种基于3D打印技术的木质地板双面涂饰方法,依次包括以下工序步骤：S1、型材表面、背面处理；S2、扫描一定厚度的目标材料切面,形成色彩图像信息和三维模型；S3、根据所述三维模型,在所述型材表面、背面层叠打印,以形成的上纹理结构层、下纹理结构层；S4、根据所述色彩图像信息,分别在所述上纹理结构层、下纹理结构层之上UV打印,以形成上纹理图案层、下纹理图案层。本申请的双面涂饰方法,可相对较为逼真地再现珍贵硬阔叶材的纹理结构,形成的3D涂饰层具有立体感；还可同时实现木质地板的表面、背面同时打印,提高了低等级型材的附加价值。(The application discloses wooden floor two-sided coating method based on 3D printing technology includes following process steps in proper order: s1, processing the surface and the back of the profile; s2, scanning a target material section with a certain thickness to form color image information and a three-dimensional model; s3, according to the three-dimensional model, printing the surface and the back of the profile in a stacking mode to form an upper texture structure layer and a lower texture structure layer; and S4, respectively carrying out UV printing on the upper texture structure layer and the lower texture structure layer according to the color image information to form an upper texture pattern layer and a lower texture pattern layer. The double-sided coating method can relatively vividly reproduce the texture structure of precious hard broad-leaved wood, and the formed 3D coating layer has stereoscopic impression; the surface and the back of the wooden floor can be printed simultaneously, and the added value of the low-grade section bar is improved.)

1. A wood floor double-sided coating method based on a 3D printing technology is characterized by sequentially comprising the following steps:

s1, processing the surface and the back of the section bar (800);

s2, scanning a target material section with a certain thickness to form color image information and a three-dimensional model;

s3, according to the three-dimensional model, printing on the surface and the back of the profile (800) in a laminating mode to form an upper texture structure layer (101) and a lower texture structure layer (102);

s4, respectively carrying out UV printing on the upper texture structure layer (101) and the lower texture structure layer (102) according to the color image information to form an upper texture pattern layer (201) and a lower texture pattern layer (202);

in step S3, the profile (800) is vertically placed, and the surface and the back of the profile (800) are printed in a laminating way from two sides of the profile respectively;

in step S4, UV printing is performed using UV ink added with abrasion resistant raw materials, and the upper texture structure layer (101) and the lower texture structure layer (102) are UV printed from both sides of the profile (800), respectively.

2. The double-sided finishing method for wooden floors based on 3D printing technology according to claim 1, characterized in that, during printing, the long-side male tenon portion (810) of the profile (800) is arranged vertically upward, and the long-side female tenon portion (820) is arranged above the printing workbench (910).

3. The wood floor double-sided coating method based on the 3D printing technology as claimed in claim 2, wherein a fixed male tenon (911) matched with the long-side female tenon portion (820) is arranged on the surface of the printing workbench (910), a portal frame (920) is arranged across the printing workbench (910), a fixed female tenon (922) matched with the fixed male tenon (911) is arranged on a top beam (921) of the portal frame (920), and a surface printing unit (930) and a back printing unit (940) are respectively arranged on a pair of side beams (923) of the portal frame (920).

4. The wood floor double-sided finishing method based on 3D printing technology as claimed in claim 3, characterized in that the height of said gantry (920) is adjustable; be provided with a plurality of fixed public tenons (911) on print work platform (910), be provided with on back timber (921) with a plurality of fixed female tenon (922) that fixed public tenon (911) one-to-one set up.

5. The 3D printing technology based wood floor double-sided finishing method as claimed in claim 1, wherein the wear resistant raw material is one of alumina powder, silica powder, alumina stickies, or silica stickies.

6. The wood flooring double-sided finishing method based on 3D printing technology as claimed in claim 1, wherein the scanning thickness of the target material section is 0.1 to 5mm in step S2.

7. The wood floor double finishing method based on 3D printing technology as claimed in claim 1, wherein in step S3, white UV ink is used for lamination printing and UV light curing to form the upper texture structure layer (101) and the lower texture structure layer (102).

8. The double-sided coating method for the wood floor based on the 3D printing technology as claimed in claim 7, wherein the thickness of the upper texture structure layer (101) and the thickness of the lower texture structure layer (102) are both 0.1-0.3 mm, and the layered thickness of the laminated printing is 20-30 μm.

9. The wood flooring double-sided finishing method based on 3D printing technology as claimed in claim 1, wherein in the step S4, UV light is used for curing to form the upper texture pattern layer (201) and the lower texture pattern layer (202), and the degree of curing of the upper texture pattern layer (201) is 70-80%, and the lower texture pattern layer (202) is completely cured; and after step S4, performing the steps of:

s5, coating a wear-resistant layer (300) on the upper texture pattern layer (201);

s6, coating a scratch-resistant layer (400) on the wear-resistant layer (300).

10. The wood floor double-sided finishing method based on 3D printing technology as claimed in claim 9, wherein in step S5, the abrasion resistant paint is coated on the upper texture pattern layer (201) by curtain coating, and the coating amount of the abrasion resistant paint is 100-120 g/square meter; in step S6, the scratch-resistant paint is coated on the wear-resistant layer (300) through roller coating, and the coating amount of the scratch-resistant paint is 10-20 g per square meter.

Technical Field

The application relates to the technical field of coating, in particular to a wood floor double-sided coating method based on a 3D printing technology.

Background

The high value-added utilization of low-grade profiles (for example, plywood, high-density fiberboard, oriented strand board, etc. made of fast-growing wood, twigs, etc., or solid wood profiles made directly of fast-growing wood) has been a subject of research in the field of wood processing. One solution to high value-added utilization of low-grade profiles is to make wood grain forming high-grade wood (e.g., precious wood or a-grade hardwood) on the surface of the low-grade profile by 3D printing. In the prior art, the solution includes the following three specific implementation methods:

(1) the method is limited by the number of roller plates, the types of wood textures which can be manufactured are very limited, and the repetition rate of the same wood texture after the product is paved is high;

(2) the method can print any one of scanned wood textures, but is limited to a plane printing mode, so that the wood textures lack three-dimensional sense and the printed wood textures have low fidelity;

(3) the layer-by-layer ink-jet printing is to print the scanned pattern layer (UV pattern layer or ink pattern layer) on the surface of the section bar, and then spray transparent or semitransparent UV or ink on the specific position on the pattern layer to form the texture layer, but the texture layer is covered on the pattern layer, so the pattern and the texture of the wood texture prepared by the method are separated visually, and the fidelity of the printed wood texture is low.

Meanwhile, the above three specific methods can only perform the texture coating on the surface of the wood floor, however, the back surface of the wood floor is also in the interest of consumers as a product. In view of the above, a method for finishing a wood floor with high fidelity of wood grain and capable of realizing double-sided printing is needed.

Disclosure of Invention

The technical purpose of the present application is to overcome the above technical problems, so as to provide a wood floor double-sided coating method based on 3D printing technology, which can relatively vividly reproduce texture structures such as concave-convex, wire drawing, wood ray, pipe hole and the like of precious hard broad-leaved wood, and the formed 3D coating layer has stereoscopic impression; meanwhile, the surface and the back of the wood floor can be printed simultaneously, the surface and the back of the sectional material are both provided with wood grains of high-grade wood, and the added value of the low-grade sectional material is improved.

In order to achieve the technical purpose, the application discloses a wood floor double-sided coating method based on a 3D printing technology, which sequentially comprises the following steps of:

s1, processing the surface and the back of the profile;

s2, scanning a target material section with a certain thickness to form color image information and a three-dimensional model;

s3, according to the three-dimensional model, printing the surface and the back of the profile in a stacking mode to form an upper texture structure layer and a lower texture structure layer;

s4, respectively carrying out UV printing on the upper texture structure layer and the lower texture structure layer according to the color image information to form an upper texture pattern layer and a lower texture pattern layer;

in step S3, the sectional material is vertically placed, and the surface and the back of the sectional material are printed in a stacked manner from both sides of the sectional material;

in step S4, UV printing is performed using UV ink added with wear-resistant raw materials, and the upper texture structure layer and the lower texture structure layer are respectively UV printed from both sides of the profile.

By the method, when the profile is vertically (in the width direction) placed during printing, the surface and the back of the profile can be simultaneously printed from two sides of the profile, the upper texture structure layer and the lower texture structure layer are formed on the surface and the back of the profile, and then the upper texture pattern layer and the lower texture pattern layer are formed simultaneously, so that the 3D coating layer is formed on the surface and the back of the profile simultaneously, the profile is manufactured into a product with the surface and the back both having wood textures of high-grade wood, and the added value of the low-grade profile is effectively improved.

Meanwhile, the texture structure layer is printed firstly to form texture structures including wood rays, pipe holes and the like of the section of the target material on the surface and the back surface of the section, and then the upper texture pattern layer and the lower texture pattern layer are printed and formed on the upper texture structure layer and the lower texture structure layer, namely, the texture structures of the natural color are colored, so that the reproduced wood texture is not limited to the textures of concave-convex shapes, wire drawing and the like on the surface of the wood, but also comprises finer structures of the wood rays, the pipe holes and the like, and therefore, the wood texture has more vivid finishing effect; and the texture structure layer and the texture pattern layer are combined to have stronger integral feeling, and the texture pattern layer is more vivid due to the reflection of the texture structure layer, so that the 3D coating layer on the surface and the back has three-dimensional effect.

Preferably, during printing, the long-edge male tenon part of the profile is vertically upward, and the long-edge female tenon part is arranged on the printing workbench.

Preferably, the surface of the printing workbench is provided with a fixed male tenon matched with the long-edge female tenon, a portal frame stretches over the printing workbench, a top beam of the portal frame is provided with a fixed female tenon matched with the fixed male tenon, and a pair of side beams of the portal frame are respectively provided with a surface printing unit and a back printing unit.

Preferably, the height of the portal frame is adjustable; the printing device is characterized in that a plurality of fixed male tenons are arranged on the printing workbench, and fixed female tenons which correspond to the fixed male tenons one to one are arranged on the top beam.

Preferably, the abrasion-resistant raw material is alumina powder, silica powder, alumina paste, or silica paste.

Preferably, in step S2, the scan thickness of the target material section is 0.1-5 mm.

Preferably, in step S3, the upper and lower texture structure layers are formed by performing lamination printing using white UV ink and curing with UV light.

Preferably, the thicknesses of the upper texture structure layer and the lower texture structure layer are 0.1-0.3 mm, and the layering thicknesses of the laminated printing are 20-30 micrometers.

Preferably, in step S3, the laminate printing is performed using a raw material, which includes thermosetting resin, wood powder having a particle size of 20 to 50 μm, and abrasion resistant powder, and the upper texture structure layer and the lower texture structure layer are formed by heat curing.

Preferably, the thicknesses of the upper texture structure layer and the lower texture structure layer are both 2-5 mm, and the layering thicknesses of the laminated printing are both 100-500 mu m.

Preferably, the wear-resistant powder is Al₂0₃Powder or SiO₂A powder, and the abrasion resistant powderThe ratio of the addition amount of (A) to the addition amount of the wood flour is 1 (2-4).

Preferably, in step S3, the following substeps are included:

s3-1, according to the three-dimensional model, when the surface of the profile is subjected to laminated printing, only printing a 1 st layer to a 4 th layer from the last to a 5 th layer from the last to form an upper basic texture structure layer;

and S3-2, according to the three-dimensional model, printing a 4 th layer or a 5 th layer to a last layer in a laminating mode by using transparent or semitransparent UV ink on the upper basic texture structure layer to form an upper texture correction layer.

Preferably, the upper texture correction layer has a delamination thickness of 20 to 30 μm.

Preferably, in step S3, the thermal expansion particles are printed on top of the uncured upper texture structure layer in a lamination process according to the last lamination of the three-dimensional model, and then the upper texture structure layer is cured.

Preferably, after the upper texture layer is solidified and cooled, the thermal expansion particles are taken out, and then step S4 is performed.

Preferably, the thermally expandable fine particles have a particle diameter of 10 to 20 μm.

Preferably, in step S4, the upper and lower grain pattern layers are formed by UV light curing, the upper grain pattern layer has a curing degree of 70-80%, and the lower grain pattern layer is complete; and after step S4, performing the steps of:

s5, coating a wear-resistant layer on the upper texture pattern layer;

s6, coating a scratch-resistant layer on the wear-resistant layer.

Preferably, in step S5, the wear-resistant paint is coated on the upper texture pattern layer by curtain coating, and the coating amount of the wear-resistant paint is 100-120 g per square meter; in step S6, the scratch-resistant paint is coated on the wear-resistant layer through roller coating, and the coating amount of the scratch-resistant paint is 10-20 g per square meter.

By the method, when the profile is vertically placed during printing, the surface and the back of the profile can be simultaneously and respectively printed from two sides of the profile, the upper texture structure layer and the lower texture structure layer are simultaneously formed on the surface and the back of the profile, and then the upper texture pattern layer and the lower texture pattern layer are simultaneously formed, so that the 3D coating layer is simultaneously formed on the surface and the back of the profile, the surface and the back of the profile are both provided with high-grade wood texture products, and the added value of the low-grade profile is improved.

Meanwhile, the texture structure layer is printed firstly to form texture structures including wood rays, pipe holes and the like of the section of the target material on the surface and the back surface of the section, and then an upper texture pattern layer and a lower texture pattern layer are printed and formed on the texture structure layer (upper and lower), namely the texture structure of the natural color is colored, so that the reproduced wood texture is not limited to the textures of concave-convex, wire drawing and the like on the surface of the wood, but also comprises finer structures of the wood rays, the pipe holes and the like, and therefore, the wood-like composite decorative material has more vivid finishing effect; and the texture structure layer (upper and lower) and the texture pattern layer (upper and lower) are combined to have stronger integral feeling, the texture pattern layer (upper and lower) is reflected by the texture structure layer (upper and lower) to be more vivid, and the 3D coating layer on the surface and the back has three-dimensional effect.

Furthermore, white UV printing ink is used for laminating and printing, so that the surface and the back of the section bar can be primed while texture structure layers (upper and lower) are manufactured, and the coloring effect of the texture pattern layers (upper and lower) on the texture structure layers (upper and lower) is effectively ensured. On the other hand, if the original material is used for laminating and printing, the thickness of the texture structure layer (upper and lower) can be effectively improved, so that the 3D coating layers on the surface and the back are more vivid; in particular, the improvement of the thickness of the upper texture structure layer can enrich the treatment process of the 3D coating layer on the surface, such as the antique treatment process of copying and printing a large arc chamfer, so that the coated low-grade section bar has the antique treatment effect of thick-skinned precious and hard broad-leaved wood.

Furthermore, through the arrangement of the upper texture trimming layer, the printing misalignment degree of the upper texture structure layer and the upper texture pattern layer can be effectively trimmed visually, and the stereoscopic impression of the upper basic texture structure layer is improved.

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 diagram of a wood floor based on 3D printing technology according to embodiment 1 of the present application;

FIG. 2 is a schematic view of a duplex printing method according to embodiment 1 of the present application;

fig. 3 is a schematic structural diagram of a wood floor based on 3D printing technology according to embodiment 2 of the present application;

fig. 4 is a schematic structural diagram of a wood floor based on 3D printing technology according to embodiment 3 of the present application;

fig. 5 is a schematic structural diagram of a wood floor based on 3D printing technology according to embodiment 5 of the present application;

in the drawings: 101-upper texture structure layer, 102-lower texture structure layer, 110-upper basic texture structure layer, 120-upper texture correction layer, 201-upper texture pattern layer, 202-lower texture pattern layer, 300-wear layer, 400-scratch-resistant layer, 800-section bar, 810-long-edge male tenon, 820-long-edge female tenon, 910-printing workbench, 911-fixed male tenon, 920-portal frame, 921-top beam, 922-fixed female tenon, 923-side beam, 930-surface printing unit and 940-back printing unit.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.