阅读说明：本技术 一种高平整性三聚氰胺饰面板压贴方法 (High-flatness melamine veneer pressing and pasting method ) 是由 余凯 王建兵 于 2020-06-22 设计创作，主要内容包括：本发明公开了一种高平整性三聚氰胺饰面板压贴方法,包括以下步骤：S1、取中密度纤维板材,对板材的表面进行喷水处理；S2、用塑料薄膜将板材包裹密封,养生120h以上,板材含水率在8－12％；S3、养生后对板材进行压贴,采用单张压贴工艺,压贴时压贴压力7－8MPa,压贴时间16－20s,压贴温度160－180℃,得到半成品；S4、将半成品码垛堆放,每垛板材先用塑料薄膜密封,然后再进行捆扎,养生60－120h即得成品。本发明通过平衡中密度纤维板的含水率,使板材内部纤维之间延展性变软,韧性增强,降低纤维的脆性,并同时通过低压低温压贴后,使板材纤维结构充分重组,再加之后续的正确堆放、包装、养生,确保了板材的平整度,解决了现有技术所存在的不足。(The invention discloses a high-flatness melamine veneer pressing method, which comprises the following steps: s1, taking the medium-density fiber board, and spraying water on the surface of the board; s2, wrapping and sealing the plate by using a plastic film, and preserving for over 120 hours, wherein the water content of the plate is 8-12%; s3, pressing and pasting the plate after curing, wherein a single pressing and pasting process is adopted, the pressing and pasting pressure is 7-8 MPa, the pressing and pasting time is 16-20S, and the pressing and pasting temperature is 160-; and S4, stacking the semi-finished products, sealing each stack of plates by using a plastic film, then bundling the plates, and curing for 60-120 hours to obtain the finished product. According to the invention, by balancing the water content of the medium-density fiberboard, the ductility among fibers in the board is softened, the toughness is enhanced, the brittleness of the fibers is reduced, and meanwhile, after the fiber structure of the board is fully recombined through low-pressure low-temperature pressing, and then subsequent correct stacking, packaging and health maintenance are carried out, so that the flatness of the board is ensured, and the defects in the prior art are overcome.)

1. A high-flatness melamine veneer pressing method is characterized by comprising the following steps:

s1, taking the medium-density fiber board, and spraying water on the surface of the board to wet the surface of the board;

s2, after the water spraying treatment of the plate is finished, wrapping and sealing the plate by using a plastic film, and maintaining for more than 120 hours, wherein the water content of the plate is 8-12%;

s3, after the curing treatment is finished, pressing and pasting the plates, wherein a single pressing and pasting process is adopted, the pressing and pasting pressure is 7-8 MPa, the pressing and pasting time is 16-20S, and the pressing and pasting temperature is 160-;

and S4, stacking the semi-finished products, sealing each stack of plates by using a plastic film, then bundling the plates, and curing for 60-120 hours to obtain the finished product.

2. The method for pressing and pasting the melamine veneer with high flatness as recited in claim 1, wherein the thickness of the medium-density fiber board is 2-4 mm, and the single surface of the medium-density fiber board is subjected to water spraying treatment.

3. The method for pressing and pasting the melamine decorative panel with high flatness according to claim 2, wherein the panels are stacked on the platform in a stacking manner after water spraying treatment, the water spraying surfaces of the adjacent stacked panels are opposite, the bottom layer and the top layer are flatly placed on the base plate during stacking, and then the panels are wrapped and sealed by the plastic film.

4. The method for pressing and pasting the melamine veneer with high flatness as claimed in claim 3, wherein when stacking, every 40-80 sheets are stacked and flatly placed on the platform, and at least 2 heavy sheets are flatly placed on the top layer of each stack to ensure that each stack of sheets is flat and balanced up and down.

5. The method of claim 4, wherein at least 5 bundles of each stack of sheets are stacked along the length of the sheets to ensure that the upper and lower stress points of the sheets are aligned when stacked, thereby preventing the sheets from being deformed by a wrong layer of pressure.

6. A method for pressing a melamine veneer with high flatness according to any one of claims 1 to 5, characterized in that the resulting finished product is used for processing a honeycomb panel part.

Technical Field

The invention relates to the technical field of melamine veneer pressing, in particular to a high-flatness melamine veneer pressing method.

Background

The melamine veneer is a triamine plate or a veneer for short, and is formed by laminating base plates such as a medium density fiberboard, a shaving board, a moistureproof board, a multi-layer solid wood splint and the like and melamine impregnated paper at a high temperature, has the greatest advantages of environmental protection, wear resistance, high temperature resistance, corrosion resistance, water resistance, simplicity, convenience and the like, and is the first choice for customizing furniture and plate-type furniture.

When the melamine veneer is produced, the medium-density fiberboard can be deformed in different degrees according to a general pressing method, and difficulty in different degrees is caused for subsequent processing. In order to solve the problems, manufacturers usually adopt softened wood fine materials to produce softened medium-density fiber boards, and then the melamine veneer boards are obtained after high-temperature and high-pressure veneering, so that the problem of warping deformation among melamine veneer boards can be solved.

Chinese patent CN101954657B discloses a melamine impregnated paper profile facing pressing method, which adopts a softened medium density fiberboard to form a melamine veneer, and the production process of the softened medium density fiberboard is as follows: the production process has the advantages that the wood is sliced and then softened in vacuum, and then the adhesive and the softener are used for forming the softened medium density fiberboard.

Disclosure of Invention

The invention aims to: aiming at the existing problems, the method for pressing and pasting the melamine veneer with high flatness is provided, the ductility among fibers in the plate is softened and the toughness is enhanced by balancing the water content of the medium-density fiberboard, the brittleness of the fibers is reduced, and meanwhile, the fiber structure of the plate is fully recombined after the melamine veneer is pressed and pasted at low pressure and low temperature, and then the plate is ensured to be flat by subsequent correct stacking, packaging and health maintenance, so that the defects in the prior art are overcome.

The technical scheme adopted by the invention is as follows: a high-flatness melamine veneer pressing method is characterized by comprising the following steps:

s1, taking the medium-density fiber board, and spraying water on the surface of the board to wet the surface of the board;

s2, after the water spraying treatment of the plate is finished, wrapping and sealing the plate by using a plastic film, and maintaining for more than 120 hours, wherein the water content of the plate is 8-12%;

s3, after the curing treatment is finished, pressing and pasting the plates, wherein a single pressing and pasting process is adopted, the pressing and pasting pressure is 7-8 MPa, the pressing and pasting time is 16-20S, and the pressing and pasting temperature is 160-;

and S4, stacking the semi-finished products, sealing each stack of plates by using a plastic film, then bundling the plates, and curing for 60-120 hours to obtain the finished product.

In the method, the water content of the medium-density fiberboard is balanced by adopting a water spraying humidification mode, the range of the water content is limited, the ductility among fibers in the board is softened, the toughness is enhanced, the brittleness of the board fibers is reduced, the processing performance of the medium-density fiberboard is improved, the plastic film is wrapped and sealed, the uniform permeation of the water in the board can be ensured, and the aim of balancing the water content of the medium-density fiberboard is fulfilled. Further, during pressing, the pressing pressure is 7-8 MPa, which is lower than the conventional pressing pressure of 20MPa, the pressing time is 16-20 s, the pressing temperature is 160-180 ℃, which is lower than the conventional pressing temperature of 180-200 ℃, namely, the low-pressure and low-temperature pressing mode is adopted to fully recombine the fiber structure of the board, after pressing, the plastic film is used for sealing and balanced curing, moisture absorption is prevented, the internal stress of the pressed board is balanced and released, the finally obtained finished product has excellent flatness and no warping deformation, and the problem of warping deformation of the board during production of the melamine veneer in the prior art is solved.

Further, the thickness of the medium-density fiber board is 2-4 mm, and the single surface of the medium-density fiber board is subjected to water spraying treatment.

Further, the plates are stacked on the platform in a stacking mode after water spraying treatment, water spraying surfaces between adjacent stacked plates are opposite, the bottom layer and the top layer are flatly placed on the base plate during stacking, uniform permeation of the inner parts of the plates is guaranteed, and then the plates are wrapped and sealed by plastic films.

Furthermore, because the plates are subjected to humidification and sealing treatment, in order to avoid the later-stage plate mildew and deformation caused by changes of moisture content, the stacked and adhered semi-finished products are shortened in stacking and circulating time, during stacking, every 40-80 plates are stacked, preferably 60 plates are stacked and flatly placed on a platform, and at least 2 heavy plates are flatly placed on the top layer of each stack to ensure that each stack of plates is flat and balanced.

Further, at least 5 piles of plates are bundled along the length direction of the plates, and the alignment of the upper stress point and the lower stress point of the plates is ensured during stacking so as to prevent the plates from being deformed due to the compression of staggered layers.

In the press-fitting method of the present invention, the resultant finished product is mainly used for processing a honeycomb panel member.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: according to the invention, by balancing the water content of the medium-density fiberboard, the ductility among fibers in the board is softened, the toughness is enhanced, the brittleness of the fibers is reduced, and meanwhile, after the medium-density fiberboard is pressed and attached at low pressure and low temperature, the fiber structure of the board is fully recombined, and then the high-flatness melamine veneer is obtained by correctly stacking, packaging and maintaining the board, so that the flatness of the board is ensured, and the defects in the prior art are overcome.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.