CN101157236A - Coating method of wood veneer-faced wood product and product thereof - Google Patents

Abstract

The invention discloses a coating method of a wooden product, which is characterized in that a paint film with better flexibility is coated on the front surface of a veneer to replace a primer or a primer plus a finish paint in the traditional method, and the veneer coated with the paint film is stuck on curved surface parts of all surfaces of a workpiece. The coating method changes the procedures of color wiping, priming, sanding and the like which are difficult to realize mechanical coating processing in the traditional method into mechanical processing, thereby improving the working efficiency and reducing the reject ratio of products.

Description

Coating method and product of wood veneer veneer

technical field

The invention relates to wood products, in particular to a coating method of veneer veneer wood products and its products.

Background technique

Because with the improvement of people's living standards, they begin to pursue the quality of life and taste of life, and nature and nostalgia have gradually become synonymous with fashion and quality in the home furnishing field. At present, the high price of solid wood household items on the market makes people forget; using a large amount of solid wood as materials also conflicts with people's increasing awareness of environmental protection. The emergence of veneer veneer household products perfectly solves these contradictions. With its realistic wood grain effect, good environmental protection performance and unique mosaic method, it gives people a feeling of returning to nature, and is more and more favored by consumers.

At present, the coating method of veneer veneer wood products is generally: first paste (or cover) the white veneer on the workpiece, then wipe the base color, apply the primer multiple times, polish it multiple times, and finally apply the top coat . In this traditional method, for complex workpieces with many curved surfaces, manual priming and polishing are mostly used, which requires a large and difficult workload, resulting in difficult control of product quality; at the same time, because it is difficult to realize mechanized assembly line coating, Production efficiency is very low. This just needs to develop the coating method of a kind of novel veneer veneer wood product, to adapt to the demand of suitability for industrialized production.

Contents of the invention

The primary purpose of the present invention is to provide a method for manufacturing a veneer with a varnish film, which can facilitate the coating of wood products when the veneer with a varnish film produced by the method is applied to the production of wood products.

A second object of the present invention is to provide a lacquered veneer obtained by the above method.

The third object of the present invention is to provide a coating method for veneer veneer wood products.

The fourth object of the present invention is to provide a wood veneer veneer product obtained by the above coating method.

The preparation method of veneer veneer of the present invention comprises the following steps:

The first step is to paste the non-woven fabric on the back of the veneer;

The second step is to apply a paint film on the front of the veneer: according to the thickness of the pores on the front of the veneer, one or more steps of primer coating, drying, and sanding are carried out on the front of the veneer to obtain a paint film that meets the requirements of spray painting and make a varnish Membrane veneer.

According to the present invention, depending on the ground color situation of the front side of the veneer, the step of rubbing the ground color on the front side can also be included in the second step before the primer is applied on the front side of the veneer.

According to the present invention, the glue used in the second step includes: polyvinyl acetate emulsion (PVAC, commonly known as "white latex"), ultraviolet curing resin (UV paint), water-based polymer isocyanate (EPI), and polyurethane hot melt Glue (PUR).

According to the present invention, sticking the non-woven fabric on the back of the veneer in the first step is to press the non-woven fabric and the back of the veneer with a hot press after sizing the non-woven fabric.

The coating method of veneer veneer wood product of the present invention comprises the following steps:

A. Paste the veneer with paint film on the part of the surface of the woodwork workpiece that is difficult to realize mechanized coating processing;

B. Paste white veneer on the part that can realize mechanized coating processing on the surface of wood products.

C. After the workpieces processed by the above steps A and B are directly or assembled into products, implement mechanized coating construction on the blank part, and finally apply topcoat to the products uniformly.

According to the present invention, the part that is difficult to realize mechanized painting process includes curved surfaces and planes, preferably curved surfaces.

According to the present invention, the part that can realize mechanized painting process is a plane.

According to the present invention, the mechanized painting process includes the steps of base color rubbing, priming and sanding.

According to the present invention, the part on the surface of the workpiece that can be processed by mechanized painting can also be pasted with a veneer with a paint film.

According to the present invention, if the veneer with the paint film is pre-coated with a good decorative surface layer, the workpiece does not need to be coated with top coat after the veneer with the paint film is pasted.

In summary, compared with the traditional coating method, the coating method of veneer veneer wood products of the present invention saves the operations such as wiping the base color, priming and sanding which are difficult to realize mechanization, thereby greatly reducing the The workload is reduced, the work efficiency is improved, and the defect rate of products is also reduced. In addition, the method of the invention can also save a lot of paint consumption, so it has broad industrial application prospects.

Detailed ways

The present invention will be further described below in conjunction with specific embodiments. It should be understood that the following examples are only used to illustrate the present invention but not to limit the scope of the present invention.

The production embodiment of band paint film veneer

The preparation method of veneer veneer of the present invention comprises the following steps:

The first step is to paste the non-woven fabric on the back of the veneer;

The second step is to apply the paint film on the front of the veneer: first, according to the background color of the front of the veneer, selectively wipe the base color, and then apply primer and dry on the front of the veneer one or more times according to the thickness of the pores on the front of the veneer. , Sanding steps until a qualified paint film is obtained.

Embodiment 1, system paint film with polyvinyl acetate emulsion (PVAC)

The first step is to paste the non-woven fabric on the back of the veneer: mix the urea glue and milky white glue evenly at a volume ratio of 1:1, then use a sizing machine to sizing the non-woven fabric, and finally use a hot press to glue the non-woven fabric and Gluing on the back of veneer;

The second step is to apply a paint film on the front of the veneer: first, according to the background color of the front of the veneer used, use a roller coater to wipe the background color on the front of the veneer, and then use a sizing machine to coat a layer of PVAC on the front of the veneer, bake Sanding after drying, the paint film obtained by testing meets the requirements of spray painting, that is, it is made into wood veneer with paint film.

Embodiment 2, system paint film with aqueous macromolecule isocyanate (EPI)

The first step is to paste the non-woven fabric on the back of the veneer: mix the urea glue and milky white glue evenly at a volume ratio of 1:1, then use a sizing machine to sizing the non-woven fabric, and finally use a hot press to glue the non-woven fabric and Bonding on the back of veneer;

The second step is to apply a paint film on the front of the veneer: first, according to the background color of the front of the veneer used, it is determined that there is no need to wipe the background color, and a layer of EPI is directly applied to the front of the veneer with a glue machine, sanded after drying, and obtained by testing The paint film still does not meet the requirements of spray painting, and the primer is applied for the second time, dried, and sanded to obtain a paint film that meets the requirements, and made into a veneer with a paint film.

Embodiment 3, system paint film with polyurethane hot melt adhesive (PUR)

The first step is to paste the non-woven fabric on the back of the veneer: mix the urea glue and milky white glue evenly at a volume ratio of 1:1, then use a sizing machine to sizing the non-woven fabric, and finally use a hot press to glue the non-woven fabric and Gluing on the back of veneer;

The second step is to apply a paint film on the front of the veneer: first, according to the background color of the front of the veneer used, use a roller coater to wipe the base color on the front of the veneer, and then use a sizing machine to coat a layer of PUR on the front of the veneer, bake Sanding after drying, the paint film obtained by testing does not meet the requirements of spray painting, and the second primer, drying, and sanding are carried out to obtain a paint film that meets the requirements and make a veneer with a paint film.

Embodiment 4, system paint film with ultraviolet curing resin (UV paint)

The first step is to paste the non-woven fabric on the back of the veneer: mix the urea glue and milky white glue evenly at a volume ratio of 1:1, then use a sizing machine to sizing the non-woven fabric, and finally use a hot press to glue the non-woven fabric and Gluing on the back of veneer;

The second step is to apply a paint film on the front of the veneer: first, according to the background color of the front of the veneer used, use a roller coater to wipe the base color on the front of the veneer, and then use a sizing machine to coat a layer of UV paint on the front of the veneer. After drying and sanding, the paint film obtained by inspection does not meet the requirements of spray painting, and the second primer, drying, and sanding is carried out. The paint film obtained by inspection still does not meet the requirements of spray paint, and the third primer is applied , drying, and sanding to obtain a paint film that meets the requirements, and make a veneer with a paint film.

Although above only with PVAC, EPI, UV paint and PUR as the paint film film-forming material exemplified the preparation method of the band paint film wood veneer, those skilled in the art can obviously find out that adopting other paint Film-forming materials can also achieve the purpose of the present invention, and thus also belong to the scope of the present invention.

Example of wood product coating

For the coating of veneer veneer wood products, if the flat part of the wood product workpiece can be painted with a mechanized assembly line for background coloring, primer coating, and polishing, the veneer with a paint film can be pasted on the curved surface, and the flat part Paste the white veneer, and then put the workpiece directly or assemble it into a product and put it on the assembly line for mechanized painting operations such as background coloring, roller coating, sanding, etc. on the flat white veneer, and finally the surface of the product is uniformly coated with topcoat.

If neither the plane nor the curved surface of the workpiece can be mechanized, the wood veneer with paint film is pasted on each curved surface and the plane of the workpiece, and then assembled into a product, and finally the product is uniformly coated with a layer of topcoat. Of course, for the plane part that can be processed by mechanized painting, it can also be processed by pasting the veneer with paint film.

If the varnished veneer is pre-coated with a good decorative finish, the workpiece does not need to be topcoated after the veneer has been applied.

In the coating method of the present invention, the pasting method of the veneer coated with the flexible paint film is the same as the pasting method of the common non-woven blank veneer workpiece.

Embodiment 5, the coating method of veneer wooden door

First, stick the veneer with paint film made according to the method of the foregoing embodiment on the curved surface part of the wooden door workpiece with a hot press, and paste the white veneer on the flat part of the workpiece, and then assemble the workpiece into a wooden door;

The assembled wooden door is carried out with the mechanized assembly line of roller coater, dryer and sanding machine to wipe the base color, coat the primer, and sand light. Finally, the surface of the assembled wooden door is uniformly coated with topcoat to complete the coating of the veneered wooden door workpiece. Pack.

Embodiment 6, the coating method of veneer wooden door

First, paste the veneer with the paint film made according to the method of the foregoing embodiment on the curved surface and the plane part of the wooden door workpiece with a hot press;

Then assemble the workpieces through the aforementioned treatment into wooden doors, and finally uniformly coat the surface of the assembled wooden doors with topcoat to complete the coating of veneered wooden door workpieces.

Although the coating method of the present invention has only been described above by taking wooden doors as an example, the method of the present invention is equally applicable to other wood products, which is obvious to those skilled in the art, so various wood products of other types are equally applicable Belong to the scope of the present invention.

In summary, the preparation method of veneer veneer of the present invention and the coating method of wood and wood products using said veneer veneer will be difficult to realize the cumbersome processes such as color rubbing, priming and sanding of mechanized coating. It can be mechanized, which greatly reduces the workload, improves the work efficiency, and also reduces the defective rate of the product, and because the spray paint in the production process can be changed to roller paint, it can also save a lot of paint. Therefore, it has broad industrial application prospects.

Claims (12)

1. a preparation method of veneer, is characterized in that comprising the following steps: The first step is to paste the non-woven fabric on the back of the veneer; The second step is to apply a paint film on the front of the veneer: according to the thickness of the pores on the front of the veneer, one or more steps of primer coating, drying, and sanding are carried out on the front of the veneer to obtain a paint film that meets the requirements of spray painting and make a varnish Membrane veneer. 2. The method according to claim 1, characterized in that, in the second step, before the primer on the front side of the veneer, the step of wiping the base color on the front side of the veneer is also included. 3. The method according to claim 1, wherein the glue used in the second step comprises: polyvinyl acetate emulsion, water-based polymer isocyanate, ultraviolet curing resin, and polyurethane hot melt adhesive. 4. method according to claim 1 is characterized in that, sticking non-woven fabric on the veneer back side in the first step is to press non-woven fabric and veneer back side with hot press after sizing on non-woven fabric. 5. The wood veneer with paint film that the method according to any one of claims 1-4 makes. 6. A coating method for veneer veneered wood products, characterized in that it comprises the following steps: A. Paste the veneer with paint film on the part of the surface of the woodwork workpiece that is difficult to realize mechanized coating processing; B. Paste white veneer on the part of the surface of the woodwork workpiece that can realize mechanized coating processing; C. After the workpieces processed by the above steps A and B are directly or assembled into products, mechanized coating is carried out on the blank parts, and finally the products are uniformly coated with topcoat. 7. The method according to claim 6, characterized in that, the part that is difficult to implement mechanized painting process includes curved surfaces and planes. 8. The method according to claim 6, characterized in that, the part where the mechanized painting process can be realized is a plane. 9. The method according to any one of claims 6-8, characterized in that the mechanized painting process comprises the steps of wiping the base color, priming and sanding. 10. A coating method for veneer veneered wood products, characterized in that it comprises the following steps: A. Paste the wood veneer with paint film on all the parts that need to be painted on the surface of the woodwork workpiece; B. The workpieces processed in the above step A are assembled into products, and then the products are subjected to mechanized coating construction, and finally the assembled products are uniformly coated with topcoat. 11. The method according to claim 6 or 10, characterized in that, if the veneer with the paint film is pre-coated with a good decorative surface layer, then the workpiece with the paint film does not need to be coated with top coat. 12. A veneered wood product obtained by the method according to any one of claims 6-11.