CN107718182B - Method for manufacturing rhombus interweaving pattern recombination decorative veneer - Google Patents
Method for manufacturing rhombus interweaving pattern recombination decorative veneer Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
- B27D5/006—Trimming, chamfering or bevelling edgings, e.g. lists
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G11/00—Applying adhesives or glue to surfaces of wood to be joined
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Abstract
The invention belongs to the field of manufacturing of recombined decorative veneers, and particularly relates to a manufacturing method of a rhombus interweaving pattern recombined decorative veneer. The invention forms a whole set of processing and manufacturing method by multi-wheel arrangement and combination of multi-procedures of same-color and multi-color veneer assembly, turning assembly, sawing according to an angle, slicing according to an angle, special-shaped gluing and the like. According to the trend and the requirement of the decoration and fitment market, the geometrical patterns with rhombus interweaving different colors are manufactured by adjusting the technical parameters such as the thickness of the assembly, the assembly mode, the sawing angle, the sawing thickness and the like, and are different from natural texture patterns such as simulated wood grains. The invention has simple manufacturing procedure, easy operation, firm bonding between the veneers and high yield, and the finished decorative veneer is not easy to bend, deform, shrink and crack.
Description
Technical Field
The invention belongs to the field of decorative veneer processing, and particularly relates to a manufacturing method of a rhombus interweaved pattern recombined decorative veneer.
Background
Since sixties of the last century, research on the recombined decorative veneers started abroad, and countries such as italy, japan, and uk developed the recombined decorative veneers in seventies, and the industrialized production was first realized by italy. With the application of products in the building and construction industry and the furniture industry, the yield and quality of the products are continuously improved. In Japan, a great deal of research and development work has been carried out on the recombined decorative veneers, and the produced recombined decorative veneers are widely applied and replace natural veneers to some extent. The Chinese market also has a great amount of income of the production technology of the imported recombinant decorative veneers, and partial outsiders also build factories in China in the forms of exclusive resources, joint resources, technical entrepreneurial and the like.
The research of China on the recombined decorative veneers starts in the 80 th 20 th century, and due to the influx of foreign products and technologies, the situation of parallel research and production appears in China. Due to the limitation of the gluing process of the glue and the veneer bonding process, the non-dyeing combined decorative veneer is produced in the early stage, and has some differences from foreign products in the aspects of variety, quality, texture, flexibility and the like. In the past 90 years, some scientific research units such as Nanjing, Heilongjiang, Beijing, Hunan and the like carry out deep research and development on the recombined decorative veneer, and the recombined decorative veneer with quality and thickness similar to foreign products is manufactured by adopting the commonly used fast-growing tree species and geological materials in the south and the north, so that the technical gap between the recombined decorative veneer and the foreign products is reduced. In the 21 st century, the introduction of the recombinant decorative veneer technology has led to a great emergence in Jiangzhe and Zhejiang, and the development of products with different characteristics has led to the production of a series of products with vivid simulation effect and various varieties. Consumers also begin to recognize and accept the product, the use amount is gradually increased, and a color grain pattern recombined decorative veneer is developed later, so that the production technology of the recombined decorative veneer is further advanced, and the decorative effect is improved to a new level.
The recombined decorative veneer patterns can be summarized into two major types, one type is a texture form imitating natural wood, and mainly comprises chordwise textures, radial textures, tree knot textures, other abnormal structural textures of the wood and the like, the width and the direction of the textures are similar to those of the natural wood, and the decorative effect of the natural wood is basically achieved. The other type is various texture patterns which are not provided by the manufactured natural wood, such as geometric patterns, colorful scattered dots, colorful interwoven textures, color alternating textures, transverse variable textures and texture patterns with a three-dimensional decorative effect. In summary, the grain patterns of the recombined decorative veneers tend to be diversified, and the manufacturing method tends to be complicated. The research and production of the recombined decorative veneer has gone through decades of routes, can be in the original colors of various woods, and also can be artificially dyed, so that a development mode that the original radial textures and chord textures coexist in various geometric patterns is formed, the recombined decorative veneer is a model for superior use of inferior woods, and particularly, the recombined decorative veneer is a development direction of the current wood decorative material when the natural forest resources are deficient and the natural insurance engineering is implemented.
The grains of the prior recombined decorative veneer have patterns such as radial grains, chordwise grains, sparrow eyes, tree knots and other wood structure grains, but no manufacturing method can conveniently and flexibly manufacture the recombined decorative veneer with the rhombus interweaving patterns.
Disclosure of Invention
The invention aims to provide a manufacturing method of a rhombus interweaving pattern recombined decorative veneer, which can conveniently and flexibly manufacture recombined decorative veneers with different colors and different rhombus interweaving by adjusting parameters in the manufacturing process.
The manufacturing method of the diamond interweaved pattern recombined decorative veneer comprises the following steps:
1. the manufacturing method of the rhombus interweaving pattern recombination decorative veneer is characterized by comprising the following steps:
firstly, a wheel assembly: stacking a plurality of single plates with the same color along the grain to form a homochromatic blank, stacking more than two homochromatic blanks with different colors and the same thickness at intervals along the grain to form a unit blank, and sequencing the unit blanks according to the same color to form a single plate blank;
secondly, gluing and bonding, pressurizing, maintaining and trimming in one round: gluing the veneers forming the single plate blank layer by using a moisture-curing isocyanate adhesive, pressurizing the glued veneers by using a flat press, maintaining the pressure for a certain time, releasing the pressure, standing for curing, and sawing the edges of the single plate blank to be uniform after curing is finished to form a first laminated material;
thirdly, sawing in one wheel: sawing the first laminated material at a certain angle with a sawing surface and the surface veneer of the first laminated material by adopting a special-shaped sawing processing method, wherein a saw inlet and a saw outlet are respectively arranged on two end surfaces of the first laminated material, and the first laminated material is sawn to form two special-shaped laminated materials;
and fourthly, assembling the four wheels: connecting surface veneers of the two special-shaped laminated materials as gluing surfaces for assembling, and adding a plurality of unit blanks between the gluing surfaces of the two special-shaped laminated materials according to the color of the gluing surfaces and the assembling method of the step one to ensure that the color sequence of the same-color blank of the whole assembled blank of the wheel accords with the color sequence of the step one;
fifthly, gluing and bonding the two wheels, pressurizing the clamp, maintaining the health and sawing the edges: gluing the glued surfaces of the two special-shaped laminated timber and the added unit blank layer by using moisture-cured isocyanate glue, pressurizing and bonding by using a special fixture with a lateral positioning device and an end positioning device, maintaining the pressure for a certain time, releasing the pressure, placing for curing, and sawing the edges of the laminated timber to form a second laminated timber with a parallelogram side surface after curing;
six-wheel sawing and two-wheel sawing: sawing the second laminated timber into thin plates with the same thickness along the direction parallel to the cutting surfaces of the wheel, wherein the thickness of the thin plates is equal to that of the same-color blank, and each cutting surface is parallel to each other;
seventhly, three-wheel assembly: assembling the thin plate obtained by the two-wheel sawing by adopting a separate-stretch turnover method or a separate-group turnover method;
the sheet turning method is that the sheet is turned one at an interval when assembling, and the turning takes the length direction of the sheet as a rotating shaft, turns the sheet 180 degrees, and enables the two long sides of the sheet to be exchanged;
the group-spacing turning method is characterized in that a group of thin plate unit groups is turned at intervals when assembling is carried out, wherein the turning is carried out by taking the width direction of a thin plate as a rotating shaft, turning the thin plate unit groups by 180 degrees and exchanging the positions of two short edges of the thin plate unit groups; the thin plate unit group is formed by stacking a thin plate which is turned 180 degrees by taking the length direction as a rotating shaft on another thin plate which is not turned over;
when the thin plates are assembled, the adjacent sides of the adjacent rhombuses of the adjacent thin plates are not aligned to form a staggered rhombus interweaving pattern; or aligning and assembling adjacent two sides of adjacent rhombuses of adjacent sheets to form an alignment rhombus interweaving pattern, wherein adjacent sides of rhombuses with the same color are aligned to form the same-color alignment rhombus interweaving pattern, and adjacent sides of rhombuses with different colors are aligned to form different-color alignment rhombus interweaving patterns;
eighthly, three-wheel gluing and bonding, pressurizing, health preserving, edge sawing and end sealing: gluing the three-wheel assembly thin plate layer by using moisture-curing isocyanate glue, pressurizing the glued thin plate by using a flat press, maintaining the pressure for a certain time, then releasing the pressure, placing for health preservation, sawing and aligning the edges of the laminated material after the health preservation is finished to form a third laminated material with flat end surfaces, and uniformly coating the hot melt glue on two end surfaces of the third laminated material;
nine, three rounds of slicing: and planing the side surface of the third laminated material with the diamond interweaving pattern to obtain the recombined decorative veneer with the diamond interweaving pattern.
Further, the veneer in the step one is a poplar dyed veneer, the surface core of the veneer has uniform color and luster, and the wood defects are removed; the water content of the single board is 40-50%, the thickness of the single board is 0.5-1.4mm, and the thickness of the single board in the same laminated wood is the same.
Further, the coating weight of the moisture-curing isocyanate adhesive in the second step, the fifth step and the eighth step is all 110-2。
Further, the preset pressure of the first round pressurization in the second step is 1.3MPa, the preset pressure of the second round pressurization in the fifth step is 1.2MPa, and the preset pressure of the third round pressurization in the eighth step is 1.1 MPa; and step two, step five and step eight, the pressurization is carried out slowly, and the preset pressure is reached 60-90 seconds after the press is closed.
Further, the pressure maintaining time in the second step, the pressure maintaining time in the fifth step and the pressure maintaining time in the eighth step are all 3 hours, and the health preserving time is all 24 hours.
Further, in the second step, the fifth step and the eighth step, and in the third step and the sixth step, the hard alloy tipped planing saw with a side edge is adopted for sawing.
Furthermore, in the third step, the angle formed by the sawn surface and the surface veneer of the first laminated timber is α degrees, and the range of α degrees is more than or equal to 30 degrees and less than or equal to α degrees and less than or equal to 60 degrees.
And furthermore, the thickness of the hot melt adhesive in the step eight is 0.4-0.8 mm.
The invention has the beneficial effects that:
the manufacturing method of the rhombus interweaving pattern recombined decorative veneer provided by the invention fills a blank in the field of manufacturing of recombined decorative veneers. The invention forms a whole set of processing and manufacturing method by multi-wheel arrangement combination of homochromatic and multicolor assembly, separated turning assembly and a plurality of special procedures such as sawing according to an angle, slicing according to an angle, special-shaped gluing and the like.
The shape of each basic color unit of the diamond-shaped interweaving pattern is diamond-shaped, the ratio of long diagonal lines and short diagonal lines of the diamond-shaped interweaving pattern can be artificially designed and controlled through the sawing angle, the smaller the sawing angle is, the larger the ratio of the long diagonal lines and the short diagonal lines of the diamond-shaped interweaving pattern is, the smaller the width of a same color zone is, the narrower the diamond-shaped is, and the stronger the color interweaving effect of the recombined decorative veneer is at the moment; the larger the sawing angle is, the smaller the ratio of the long diagonal line and the short diagonal line of the diamond is, the larger the width of the same color zone is, the wider the diamond is, and at the moment, the diamond-shaped decorative effect of the recombined decorative veneer is more obvious. The size of the rhombus can be artificially designed and controlled by the width of the same color zone and the size of the sawing angle, and the color of the rhombus interweaving pattern can be artificially designed and controlled by the color of the raw material veneer.
The manufacturing method of the rhombus interweaving pattern recombined decorative veneer can manufacture recombined decorative veneers with different rhombus interweaving patterns only by simply and flexibly adjusting technical parameters such as a sawing angle, a sawing thickness, an assembly mode and the like according to the trend and the requirement of the current decoration market. The pattern of the decorative veneer is a diamond interweaving pattern with different colors, which is different from a natural texture and an imitated natural texture, the decorative effect is completely different from the recombined decorative veneer with the imitated natural texture, the recombined decorative veneer belongs to the artificially designed geometric shape decoration, the color is more complicated and changeable, and the appearance effect highlights the characteristics of modern fashion.
The invention has simple manufacturing procedure, easy operation, firm bonding between the veneers and high yield, and the finished decorative veneer is not easy to damage, deform and crack.
Drawings
FIG. 1 is a schematic view of a round of assembly and sawing method in the manufacturing method of the diamond interlaced pattern recombined decorative veneer of example 1;
FIG. 2 is a schematic view of two-round assembly, gluing and bonding, and fixture pressing in the manufacturing method of the diamond interlaced pattern recombined decorative veneer of example 1;
FIG. 3 is a schematic diagram of a different-color diamond-alignment interlaced pattern of a third laminated material obtained in example 1;
FIG. 4 is a schematic diagram of a same-color diamond-shaped interlaced pattern of a third laminated material obtained in example 2;
FIG. 5 is a schematic representation of a staggered diamond weave pattern for a third laminate made in example 3;
FIG. 6 is a schematic representation of a staggered diamond weave pattern for a third laminate made in example 4;
FIG. 7 is a schematic diagram of a diamond-shaped interlaced pattern of the third laminate obtained in example 5, wherein the diamond-shaped interlaced pattern has both the same color registration and the different color registration;
in the figure: 1. a first laminated material; 2. a second layer of laminated timber; 3. a third laminated material; 4. a wheel saw cuts the surface; 5. a special fixture; 6. a unit blank; 7. a reddish-brown diamond pattern; 8. a light yellow diamond pattern; 9. light brown diamond pattern; 10. dark brown diamond pattern; 11. a white diamond pattern; 12. black diamond pattern.
Detailed Description
The following examples are given in detail to illustrate the embodiments of the present invention, and the following examples are given on the premise of the technical solution of the present invention. The invention can calculate the distance between two sides of the diamond according to the designed side length of the diamond and the distance between two sides of the diamond, and can also calculate the distance between one round of sawing angles according to the designed side length of the diamond and the distance between two sides of the diamond to design a specific preparation method.
Example 1: in the diamond-shaped interlaced pattern designed in this embodiment, the side length of the diamond is 40mm, and the sawing angle of one round is 30 °, the manufacturing method of the diamond-shaped interlaced pattern recombined decorative veneer is as follows:
firstly, a wheel assembly: the raw material veneer is a reddish brown and faint yellow poplar dyed veneer which is uniform and consistent in surface core color, free of wood defects, 2440mm in length and 45% in veneer water content.
In the diamond-shaped interweaving pattern designed in the embodiment, the side length of the diamond is 40mm, the one-round sawing angle is 30 °, and the distance between two opposite sides of the diamond is calculated according to the following formula, namely the thickness of a homochromy blank, wherein b is Sin α × a, a is the side length of the diamond, α is the one-round sawing angle, and in the embodiment, b is Sin30 × 40mm is 20 mm.
Then, in this embodiment, 25 pieces of reddish-brown and yellowish veneers with the thickness of 0.8mm are respectively stacked along the grain to form a reddish-brown homochromy blank and a yellowish homochromy blank, and the thickness of each homochromy blank is 20 mm; a reddish-brown homochromy blank and a yellowish homochromy blank form a unit blank, and the thickness of each unit blank is 40 mm.
For a single plate with the length of 2440mm, calculating the position difference between a saw inlet and a saw outlet during one round of sawing by using a formula Δ S ═ L × tan α, wherein L is the length of the single plate, in this embodiment, Δ S ═ 2440mm × tan30 ° -1409 mm.
Secondly, gluing and bonding, pressurizing, maintaining and trimming in one round: gluing the veneers forming the single plate blank layer by using moisture-cured isocyanate glue, wherein the gluing amount is 115g/m2And the positions of the glued single plates and the assembly are consistent in sequence, the glued single plates are pressurized by a flat press, the preset pressure for pressurization is 1.3MPa, the pressure is slowly increased during pressurization, the preset pressure is reached 70 seconds after the press is closed, the pressure is released after the pressure is maintained for 3 hours, the single plate blank is placed for maintenance for 24 hours, and the edges of the single plate blank are sawn to form the first laminated timber 1 after the maintenance is completed.
Thirdly, sawing in one wheel: the first laminated timber 1 is sawn by a special-shaped sawing method, a wheel of sawing surface 4 and the first laminated timber surface layer single plate form an angle of 30 degrees to saw the first laminated timber 1, a saw inlet and a saw outlet are respectively arranged on two end surfaces of the first laminated timber, the position difference of the saw inlet and the saw outlet on the two end surfaces is 1409mm, and the two special-shaped laminated timber are formed by sawing.
And fourthly, assembling the four wheels: and (3) connecting the surface veneers of the two special-shaped laminated wood as gluing surfaces for assembling, adding 2 unit blanks 6 between the same-color surfaces of the two special-shaped laminated wood according to the color of the gluing surfaces and the assembling method of the step one, so that the color sequence of the same-color blanks of the whole wheel assembly accords with the color sequence of the step one, and the purpose of adding the unit blanks is to change the rigid gluing of the special-shaped laminated wood into the flexible gluing.
Fifthly, gluing and bonding the two wheels, pressurizing the clamp, maintaining the health and sawing the edges: gluing the glued surfaces of the two special-shaped laminated timber and the added unit blank 6 layer by using moisture-cured isocyanate glue, wherein the gluing amount is 115g/m2The method comprises the steps of pressurizing and bonding by using a special clamp 5 with a lateral positioning device and an end positioning device, wherein the preset pressurizing pressure is 1.2MPa, slowly boosting pressure during pressurizing, reaching the preset pressure 70 seconds after closing of a press, releasing pressure after maintaining pressure for 3 hours, standing and curing for 24 hours, and sawing and aligning the edges of the laminated wood after curing to form the second laminated wood 2 with a parallelogram side face.
Six-wheel sawing and two-wheel sawing: and sawing the second laminated wood 2 into thin plates with the same thickness along the direction parallel to one wheel of sawing surfaces 4, wherein the thickness of the sawn thin plates is 20mm, each sawing surface is parallel to each other, and the basic color units of the obtained rhombic interweaving pattern are in a rhombic shape, the length of the long diagonal of the rhombus is 77.28mm, the length of the short diagonal of the rhombus is 20.70mm, and the side length of the rhombus is 40 mm.
The thin plates can only be temporarily stacked and should not be exposed in the air for a long time, so as to prevent the defects generated by water loss from influencing the operation of the subsequent process.
Seventhly, three-wheel assembly: and assembling the thin plates obtained by two-wheel sawing by adopting an alternate turning method, wherein one thin plate is turned over at intervals during assembling, the turning is realized by taking the length direction of the thin plates as a rotating shaft, turning the thin plates by 180 degrees and changing the positions of two long sides of the thin plates, and the reddish brown rhombic patterns 7 are aligned with two adjacent sides of the faint yellow rhombic patterns 8 of the adjacent thin plates during assembling to form different-color contraposition rhombic interweaving patterns.
Eighthly, three-wheel gluing and bonding, pressurizing, health preserving, edge sawing and end sealing: the three-wheel assembly thin plate is glued layer by using moisture-curing isocyanate glue, and the glue spreading amount is 115g/m2(ii) a The positions of the glued thin plate and the three-wheel assembly are consistent in sequence, the glued thin plate is pressurized by a flat press, the preset pressure for pressurization is 1.1MPa, the pressure is slowly increased during pressurization, the preset pressure is reached after the press is closed for 70 seconds, the pressure is released after the press is closed for 3 hours, the press is placed for maintenance for 24 hours, and after the maintenance is completed, the edge of the laminated wood is sawn to form a third laminated wood with a smooth end faceAnd 3, uniformly coating the hot melt adhesive on two end surfaces of the third laminated material 3, wherein the thickness of the hot melt adhesive is 0.5 mm.
Nine, three rounds of slicing: and planning and cutting the side surface of the third laminated material 3 with the different-color contraposition rhombus interweaving pattern, and planning out the recombined decorative veneer with the different-color contraposition rhombus interweaving pattern, wherein the rhombus interweaving pattern is formed by interweaving a reddish-brown rhombus pattern 7 and a faint-yellow rhombus pattern 8, the distance between two opposite sides of a rhombus is 20mm, and the side length of the rhombus is 40 mm.
In the manufacturing method of the embodiment, the hard alloy tipped planing saw with the side blades is adopted for both edge sawing and sawing, the processing amount of subsequent processes is reduced, the surface roughness Ra (arithmetic mean deviation of the profile) of the thin plate is not more than 10 mu m, and if the surface of the thin plate is coarse and affects the gluing quality, the thin plate is slightly planed or sanded.
The reason for reducing the preset pressure of the three-wheel pressurization in the second step, the fifth step and the eighth step is to prevent the pressure from being too large to press the pressed adhesive layer of the previous wheel apart, and the pressure reduction of the three-wheel pressurization can ensure the pressurization and bonding effect of the wheel and cannot damage the pressed adhesive layer of the previous wheel.
The basic unit size of the actually manufactured decorative veneer pattern may slightly deviate from the designed theoretical value due to the compression of the wood.
Example 2: in the diamond-shaped interlaced pattern designed in this embodiment, the side length of the diamond is 40mm, and the sawing angle of one round is 30 °, the manufacturing method of the diamond-shaped interlaced pattern recombined decorative veneer is as follows:
firstly, a wheel assembly: the raw material veneer is a red-brown, light-yellow and light-brown poplar dyed veneer which is uniform and consistent in surface core color, free of wood defects, 2440mm in length and 45% in veneer water content.
In the diamond-shaped interweaving pattern designed in the embodiment, the side length of the diamond is 40mm, the one-round sawing angle is 30 °, and the distance between two opposite sides of the diamond is calculated according to the following formula, namely the thickness of a homochromy blank, wherein b is Sin α × a, a is the side length of the diamond, α is the one-round sawing angle, and in the embodiment, b is Sin30 × 40mm is 20 mm.
Then, in this embodiment, 25 reddish-brown, yellowish-brown and light-brown veneers each having a thickness of 0.8mm are respectively stacked in parallel to form a reddish-brown homochromy blank, a yellowish homochromy blank and a light-brown homochromy blank, and each homochromy blank has a thickness of 20 mm; the reddish-brown same-color blank, the yellowish same-color blank and the light-brown same-color blank respectively form a unit blank, and the thickness of each unit blank is 60 mm.
For a single plate with the length of 2440mm, calculating the position difference between a saw inlet and a saw outlet during one round of sawing by using a formula of delta S (L multiplied by tan α), wherein the position difference between the saw inlet and the saw outlet during one round of sawing is 2440mm multiplied by tan30 degrees (1409 mm), the thickness of the single plate blank is larger than the position difference between the saw inlet and the saw outlet during one round of sawing, the single plate blank is formed by sequencing 30 unit blanks according to the same color, and the thickness of the single plate blank is 1800 mm.
Secondly, gluing and bonding, pressurizing, maintaining and trimming in one round: gluing the veneers forming the single plate blank layer by using moisture-cured isocyanate glue, wherein the gluing amount is 115g/m2And the positions of the glued single plates and the assembly are consistent in sequence, the glued single plates are pressurized by a flat press, the preset pressure for pressurization is 1.3MPa, the pressure is slowly increased during pressurization, the preset pressure is reached after the press is closed for 70 seconds, the pressure is released after the press is closed for 3 hours, the press is placed for curing for 24 hours, and the edges of the single plate blanks are sawn to form the first-layer laminated timber.
Thirdly, sawing in one wheel: the first laminated timber is sawn by a special-shaped sawing method, the sawing surface of one wheel of the saw and the surface veneer of the first laminated timber form an angle of 30 degrees, the saw inlet and the saw outlet are respectively arranged on two end surfaces of the first laminated timber, the position difference of the saw inlet and the saw outlet on the two end surfaces is 1409mm, and the saw cuts form two special-shaped laminated timbers.
And fourthly, assembling the four wheels: and connecting the surface veneers of the two special-shaped laminated wood serving as gluing surfaces to assemble, and adding 2 unit blanks between the same-color surfaces of the two special-shaped laminated wood according to the color of the gluing surfaces and the assembly method of the step one, so that the color sequence of the same-color blanks of the assembly of the wheel integrally accords with the color sequence of the step one.
Fifthly, gluing and bonding the two wheels, pressurizing the clamp, maintaining the health and sawing the edges: gluing the glued surfaces of the two special-shaped laminated timber and the added unit blank layer by using moisture-cured isocyanate glue, wherein the gluing amount is 115g/m2Adopt the utensilAnd (3) pressurizing and bonding the special fixture with the lateral direction and the end direction of the positioning device, wherein the preset pressurizing pressure is 1.2MPa, slowly boosting pressure during pressurizing, reaching the preset pressure 70 seconds after the press is closed, releasing pressure after maintaining pressure for 3 hours, standing and curing for 24 hours, and sawing and aligning the edges of the laminated timber after curing to form a second laminated timber with a parallelogram side surface.
Six-wheel sawing and two-wheel sawing: and sawing the second laminated wood into thin plates with the same thickness along the direction parallel to the cutting surfaces of one wheel, wherein the thickness of the sawn thin plates is 20mm, the cutting surfaces are parallel to each other, and the basic color units of the obtained rhombic interweaving pattern are in a rhombic shape, the length of the long diagonal of the rhombus is 77.28mm, the length of the short diagonal of the rhombus is 20.70mm, and the side length of the rhombus is 40 mm.
Seventhly, three-wheel assembly: and assembling the thin plates obtained by two-wheel sawing by adopting a staggered turning method, wherein one thin plate is turned over at intervals during assembling, the turning is realized by taking the length direction of the thin plates as a rotating shaft, turning the thin plates 180 degrees, changing the positions of two long sides of the thin plates, and aligning the reddish brown rhombic patterns with two adjacent sides of the reddish brown rhombic patterns of the adjacent thin plates during assembling to form the homochromatic contraposition rhombic interweaving patterns.
Eighthly, three-wheel gluing and bonding, pressurizing, health preserving, edge sawing and end sealing: the three-wheel assembly thin plate is glued layer by using moisture-curing isocyanate glue, and the glue spreading amount is 115g/m2(ii) a The positions of the glued thin plate and the three-wheel assembly are consistent in sequence, the glued thin plate is pressurized by a flat press, the preset pressure for pressurization is 1.1MPa, the pressure is slowly increased during pressurization, the preset pressure is reached 70 seconds after the press is closed, the pressure is released after the press is closed, the press is placed for maintenance for 24 hours, after the maintenance is completed, the edges of the laminated wood are sawn to form a third laminated wood with smooth end surfaces, hot melt glue is uniformly coated on two end surfaces of the third laminated wood, and the thickness of the hot melt glue is 0.5 mm.
Nine, three rounds of slicing: and planning and cutting the side face of the third laminated material with the same-color contraposition rhombus interweaving pattern, and planning the recombined decorative veneer with the same-color contraposition rhombus interweaving pattern, wherein the rhombus interweaving pattern consists of a reddish-brown rhombus pattern 7, a faint yellow rhombus pattern 8 and a light brown rhombus pattern 9, the distance between two opposite sides of the rhombus is 20mm, and the side length of the rhombus is 40 mm.
In the manufacturing method of the embodiment, the hard alloy tipped planing saw with the side blades is adopted for both edge sawing and sawing, the processing amount of subsequent processes is reduced, the surface roughness Ra (arithmetic mean deviation of the profile) of the thin plate is not more than 10 mu m, and if the surface of the thin plate is coarse and affects the gluing quality, the thin plate is slightly planed or sanded.
Example 3: in the diamond-shaped interlaced pattern designed in this embodiment, the distance between two opposite sides of the diamond is 30mm, and the side length of the diamond is 40mm, then the manufacturing method of the diamond-shaped interlaced pattern recombined decorative veneer is as follows:
firstly, a wheel assembly: the light brown veneer and the dark brown veneer which have uniform and consistent surface core color, wood defects removed, length of 1500mm and veneer water content of 42 percent are taken as raw material veneers. Respectively stacking 30 light brown veneers and dark brown veneers with the thickness of 1.0mm along the grain to form light brown homochromy blanks and dark brown homochromy blanks, wherein the thickness of each homochromy blank is 30 mm; and (3) stacking a light brown same-color blank and a dark brown same-color blank along the grain to form a unit blank, wherein the thickness of the unit blank is 60 mm.
In the diamond-shaped interweaving pattern designed in this embodiment, the distance between two sides of the diamond is 30mm, the side length of the diamond is 40mm, and the sawing angle of one round is calculated according to the following formula, where Sin α is b/a, where a is the side length of the diamond, b is the distance between two sides of the diamond, in this embodiment, Sin α is 30mm/40mm 0.75, and the α angle is 48 °.
For a single plate with the length of 1500mm, calculating the position difference between a saw inlet and a saw outlet during one round of sawing by using a formula of delta S (1500 mm) multiplied by tan α, wherein the thickness of the single plate blank is greater than the position difference between the saw inlet and the saw outlet during one round of sawing by using a formula of delta S (1500 mm) multiplied by tan48 degrees (1666 mm), the single plate blank is formed by sequencing 30 unit blanks according to the same color, and the thickness of the single plate blank is 1800 mm.
Secondly, gluing and bonding, pressurizing, maintaining and trimming in one round: gluing the veneers forming the single plate blank layer by using moisture-cured isocyanate glue, wherein the gluing amount is 120g/m2The positions of the glued single board and the assembly are consistent in sequence, the glued single board is pressurized by a flat press, the preset pressure for pressurization is 1.3MPa, the pressure needs to be slowly increased during pressurization, and the preset pressure is reached 85 seconds after the press is closedAnd pressure relief is carried out after the pressure is maintained for 3 hours, the single plate blank is placed for curing for 24 hours, and the edge of the single plate blank is sawn to be even after the curing is finished, so that the first laminated timber is formed.
Thirdly, sawing in one wheel: and sawing the first laminated timber by a special-shaped sawing method, wherein a sawing surface and the surface veneer of the first laminated timber form an angle of 48 degrees, and a saw inlet and a saw outlet are respectively arranged on two end surfaces of the first laminated timber to form two special-shaped laminated timbers.
And fourthly, assembling the four wheels: and connecting the surface veneers of the two special-shaped laminated wood serving as gluing surfaces to assemble, and adding 2 unit blanks between the same-color surfaces of the two special-shaped laminated wood according to the color of the gluing surfaces and the assembly method of the step one, so that the color sequence of the same-color blanks of the assembly of the wheel integrally accords with the color sequence of the step one.
Fifthly, gluing and bonding the two wheels, pressurizing the clamp, maintaining the health and sawing the edges: gluing the glued surfaces of the two special-shaped laminated timber and the added unit blank layer by using moisture-cured isocyanate glue, wherein the gluing amount is 120g/m2Pressing and bonding by adopting a special clamp with a lateral positioning device and an end positioning device, wherein the preset pressure for pressing is 1.2MPa, the pressure is slowly increased during pressing, the preset pressure is reached 85 seconds after the press is closed, the pressure is released after the pressure is maintained for 3 hours, the press is placed for curing for 24 hours, and after the curing is finished, the edges of the laminated wood are sawn to form a second laminated wood with a parallelogram side surface; .
Six-wheel sawing and two-wheel sawing: and sawing the second laminated wood into thin plates with the same thickness along the direction parallel to the cutting surfaces of one wheel, wherein the thickness of the sawn thin plates is 30mm, the cutting surfaces are parallel to each other, and the basic color units of the obtained rhombic interweaving pattern are in a rhombic shape, the length of the long diagonal of the rhombus is 73.08mm, the length of the short diagonal of the rhombus is 32.54mm, and the side length of the rhombus is 40 mm.
Seventhly, three-wheel assembly: and assembling the thin plates obtained by two-wheel sawing by adopting a staggered turning method, wherein one thin plate is turned over at intervals during assembling, the turning is to turn the thin plates 180 degrees by taking the length direction of the thin plates as a rotating shaft, the positions of two long sides of the thin plates are changed, the light brown rhombic patterns are not aligned with the adjacent two sides of the adjacent rhombuses of the dark brown rhombic patterns of the adjacent thin plates during assembling, and the thin plates are assembled in a staggered mode along the same direction to form staggered rhombic interweaving patterns.
Eighthly, three-wheel gluing and bonding, pressurizing, health preserving, edge sawing and end sealing: the wet-cured isocyanate adhesive is used for gluing the thin plate of the two-wheel-set blank layer by layer, and the gluing amount is 120g/m2(ii) a The positions of the glued thin plate and the two-wheel assembly are consistent in sequence, the glued thin plate is pressurized by a flat press, the preset pressure for pressurization is 1.1MPa, the pressure is slowly increased during pressurization, the preset pressure is reached 85 seconds after the press is closed, the pressure is released after the press is closed, the press is placed for maintenance for 24 hours, after the maintenance is completed, the edges of the laminated wood are sawn to form a third laminated wood with smooth end surfaces, hot melt glue is uniformly coated on two end surfaces of the third laminated wood, and the thickness of the hot melt glue is 0.7 mm.
Nine, three rounds of slicing: and planning and cutting the side surface of the third laminated material with the staggered diamond-shaped interwoven pattern, namely planning the recombined decorative veneer with the staggered diamond-shaped interwoven pattern, wherein the diamond-shaped interwoven pattern is formed by interweaving a light brown diamond-shaped pattern 9 and a dark brown diamond-shaped pattern 10, the distance between two opposite sides of the diamond is 30mm, and the side length of the diamond is 40 mm.
In the manufacturing method of the embodiment, the hard alloy tipped planing saw with the side blades is adopted for both edge sawing and sawing, the processing amount of subsequent processes is reduced, the surface roughness Ra (arithmetic mean deviation of the profile) of the thin plate is not more than 10 mu m, and if the surface of the thin plate is coarse and affects the gluing quality, the thin plate is slightly planed or sanded.
Example 4: the manufacturing method of the diamond-shaped interlaced pattern recombined decorative veneer of the embodiment is different from the embodiment 3 only in that:
three-wheel assembly: the method for assembling the thin plates adopts a staggered turnover method, every two thin plates are turned over one at intervals, the turnover is to turn the thin plates 180 degrees by taking the length direction of the thin plates as a rotating shaft, the positions of two long sides of the thin plates are changed, and the light brown rhombuses are not aligned with the adjacent two sides of the adjacent dark brown rhombuses of the adjacent thin plates during assembling, so that the light brown rhombuses are staggered and interwoven with the adjacent two sides of the adjacent dark brown rhombuses of the adjacent thin plates to form staggered rhombuses interweaving patterns.
A third laminated material with a smooth end face is formed through the same three-wheel gluing and bonding, pressurizing, curing, edge sawing and end sealing as in the embodiment 3.
Three-wheel planing and cutting: and planning and cutting the side surface of the third laminated material with the staggered diamond-shaped interwoven pattern, namely planning the recombined decorative veneer with the staggered diamond-shaped interwoven pattern, wherein the diamond-shaped interwoven pattern is formed by interweaving light brown diamond-shaped patterns and dark brown diamond-shaped patterns, the distance between two opposite sides of each diamond is 30mm, and the side length of each diamond is 40 mm.
Example 5: in the diamond-shaped interlaced pattern designed in this embodiment, the distance between two opposite sides of the diamond is 32mm, and the side length of the diamond is 40mm, then the manufacturing method of the diamond-shaped interlaced pattern recombined decorative veneer is as follows:
firstly, a wheel assembly: the method is characterized in that a white single plate and a black single plate which have uniform and consistent surface core color and luster, are free of wood defects, have the length of 1500mm and have the water content of 48% are used as raw material single plates, 25 pieces of white single plates and 25 pieces of black single plates which are 1.2mm in thickness are stacked in parallel with grains respectively to form a white homochromy blank and a black homochromy blank, the thickness of each homochromy blank is 30mm, one white homochromy blank and one black homochromy blank are stacked in parallel with the grains to form a unit blank, and the thickness of the unit blank is 60 mm.
In the diamond-shaped interweaving pattern designed in this embodiment, the distance between two sides of the diamond is 32mm, the side length of the diamond is 40mm, and the sawing angle of one round is calculated according to the following formula, where Sin α ═ b/a, where a is the side length of the diamond, b is the distance between two sides of the diamond, in this embodiment, Sin α ═ 32mm/40mm ═ 0.8, and the α angle is 53 °.
For a single plate with the length of 1500mm, calculating the position difference between a saw inlet and a saw outlet during one round of sawing by using a formula of delta S (L) multiplied by tan α, wherein the thickness of the single plate blank is more than the position difference between the saw inlet and the saw outlet during one round of sawing by using a formula of delta S (1500 mm) multiplied by tan53 degrees (1991 mm), the single plate blank is formed by sequencing 35 unit blanks according to the same color, and the thickness of the single plate blank is 2100 mm.
Secondly, gluing and bonding, pressurizing, maintaining and trimming in one round: gluing the veneers forming the single plate blank layer by using moisture-cured isocyanate glue, wherein the gluing amount is 125g/m2The positions of the glued single plates and the assembly are consistent in sequence, the glued single plates are pressurized by a flat plate press, the preset pressure for pressurization is 1.3MPa, the pressure is slowly increased during pressurization, the preset pressure is reached 80 seconds after the press is closed, the pressure is maintained for 3 hours, the pressure is released, the single plate blank is placed for maintenance for 24 hours, and the edge of the single plate blank is maintained after the maintenance is finishedAnd sawing to form the first laminated material.
Thirdly, sawing in one wheel: and sawing the first laminated timber by a special-shaped sawing method, wherein a sawing surface and the surface veneer of the first laminated timber form an angle of 53 degrees, and a saw inlet and a saw outlet are respectively arranged on two end surfaces of the first laminated timber to saw two special-shaped laminated timbers.
And fourthly, assembling the four wheels: and connecting the surface veneers of the two special-shaped laminated wood serving as gluing surfaces to assemble, and adding 2 unit blanks between the same-color surfaces of the two special-shaped laminated wood according to the color of the gluing surfaces and the assembly method of the step one, so that the color sequence of the same-color blanks of the assembly of the wheel integrally accords with the color sequence of the step one.
Fifthly, gluing and bonding the two wheels, pressurizing the clamp, maintaining the health and sawing the edges: gluing the glued surfaces of the two special-shaped laminated timber and the added unit blank layer by using moisture-cured isocyanate glue, wherein the gluing amount is 125g/m2The method comprises the steps of pressurizing and bonding by adopting a special clamp with a lateral positioning device and an end positioning device, wherein the preset pressurizing pressure is 1.2MPa, slowly boosting pressure during pressurizing, reaching the preset pressure 80 seconds after the press is closed, releasing pressure after maintaining pressure for 3 hours, standing and curing for 24 hours, and sawing and aligning the edges of the laminated timber after curing to form a second laminated timber with a parallelogram side surface.
Six-wheel sawing and two-wheel sawing: and sawing the second laminated wood into thin plates with the same thickness along the direction parallel to the cutting surfaces of one wheel, wherein the thickness of the sawn thin plates is 30mm, the cutting surfaces are parallel to each other, and the basic color units of the obtained rhombic interweaving pattern are in a rhombic shape, the length of the long diagonal of the rhombus is 71.59mm, the length of the short diagonal of the rhombus is 35.70mm, and the side length of the rhombus is 40 mm.
Seventhly, three-wheel assembly: assembling the thin plates obtained by two-wheel sawing by adopting a group-separating turnover method, wherein during assembly, every two thin plate unit groups are turned over one group, and the turnover is realized by taking the width direction of the thin plates as a rotating shaft, turning the thin plate unit groups by 180 degrees, and replacing the positions of two short edges of the thin plate unit groups; the thin plate unit group is formed by stacking a thin plate which is turned 180 degrees by taking the length direction as a rotating shaft on another thin plate which is not turned, and the white diamond patterns of the thin plate unit group are aligned with the adjacent two sides of the adjacent black diamond patterns to form different-color contraposition diamond interweaving patterns.
When the assembly is turned over, the white rhombuses are aligned with the adjacent two sides of the adjacent white rhombuses of the adjacent thin plates to form rhombus interweaving patterns with both same color alignment and different color alignment.
Eighthly, three-wheel gluing and bonding, pressurizing, health preserving, edge sawing and end sealing: the wet-cured isocyanate adhesive is used for gluing the thin plate of the two-wheel group blank layer by layer, and the gluing amount is 125g/m2(ii) a The positions of the glued thin plate and the two-wheel assembly are consistent in sequence, the glued thin plate is pressurized by a flat press, the preset pressure for pressurization is 1.1MPa, the pressure is slowly increased during pressurization, the preset pressure is reached 80 seconds after the press is closed, the pressure is released after the press is closed, the press is placed for maintenance for 24 hours, after the maintenance is completed, the edges of the laminated wood are sawn to form a third laminated wood with smooth end surfaces, hot melt glue is uniformly coated on two end surfaces of the third laminated wood, and the thickness of the hot melt glue is 0.6 mm.
Nine, three rounds of slicing: and planning and cutting the side surface of the third laminated material with the rhombus interweaving pattern with the same color alignment and different color alignment, namely planning the recombined decorative veneer with the rhombus interweaving pattern with the same color alignment and different color alignment, wherein the rhombus interweaving pattern is formed by interweaving a white rhombus pattern 11 and a black rhombus pattern 12, the distance between two opposite edges of the rhombus is 32mm, and the side length of the rhombus is 40 mm.
In the manufacturing method of the embodiment, the hard alloy tipped planing saw with the side blades is adopted for both edge sawing and sawing, the processing amount of subsequent processes is reduced, the surface roughness Ra (arithmetic mean deviation of the profile) of the thin plate is not more than 10 mu m, and if the surface of the thin plate is coarse and affects the gluing quality, the thin plate is slightly planed or sanded.
Claims (8)
1. The manufacturing method of the rhombus interweaving pattern recombination decorative veneer is characterized by comprising the following steps:
firstly, a wheel assembly: stacking a plurality of single plates with the same color along the grain to form a homochromatic blank, stacking more than two homochromatic blanks with different colors and the same thickness at intervals along the grain to form a unit blank, and sequencing the unit blanks according to the same color to form a single plate blank;
secondly, gluing and bonding, pressurizing, maintaining and trimming in one round: gluing the veneers forming the single plate blank layer by using a moisture-curing isocyanate adhesive, pressurizing the glued veneers by using a flat press, maintaining the pressure for a certain time, releasing the pressure, standing for curing, and sawing the edges of the single plate blank to be uniform after curing is finished to form a first laminated material;
thirdly, sawing in one wheel: sawing the first laminated material at a certain angle with a sawing surface and the surface veneer of the first laminated material by adopting a special-shaped sawing processing method, wherein a saw inlet and a saw outlet are respectively arranged on two end surfaces of the first laminated material, and the first laminated material is sawn to form two special-shaped laminated materials;
and fourthly, assembling the four wheels: connecting surface veneers of the two special-shaped laminated materials as gluing surfaces for assembling, and adding a plurality of unit blanks between the gluing surfaces of the two special-shaped laminated materials according to the color of the gluing surfaces and the assembling method of the step one to ensure that the color sequence of the same-color blank of the whole assembled blank of the wheel accords with the color sequence of the step one;
fifthly, gluing and bonding the two wheels, pressurizing the clamp, maintaining the health and sawing the edges: gluing the glued surfaces of the two special-shaped laminated timber and the added unit blank layer by using moisture-cured isocyanate glue, pressurizing and bonding by using a special fixture with a lateral positioning device and an end positioning device, maintaining the pressure for a certain time, releasing the pressure, placing for curing, and sawing the edges of the laminated timber to form a second laminated timber with a parallelogram side surface after curing;
six-wheel sawing and two-wheel sawing: sawing the second laminated timber into thin plates with the same thickness along the direction parallel to the cutting surfaces of the wheel, wherein the thickness of the thin plates is equal to that of the same-color blank, and each cutting surface is parallel to each other;
seventhly, three-wheel assembly: assembling the thin plate obtained by the two-wheel sawing by adopting a separate-stretch turnover method or a separate-group turnover method;
the sheet turning method is that the sheet is turned one at an interval when assembling, and the turning takes the length direction of the sheet as a rotating shaft, turns the sheet 180 degrees, and enables the two long sides of the sheet to be exchanged;
the group-spacing turning method is characterized in that a group of thin plate unit groups is turned at intervals when assembling is carried out, wherein the turning is carried out by taking the width direction of a thin plate as a rotating shaft, turning the thin plate unit groups by 180 degrees and exchanging the positions of two short edges of the thin plate unit groups; the thin plate unit group is formed by stacking a thin plate which is turned 180 degrees by taking the length direction as a rotating shaft on another thin plate which is not turned over;
when the thin plates are assembled, the adjacent sides of the adjacent rhombuses of the adjacent thin plates are not aligned to form a staggered rhombus interweaving pattern; or aligning and assembling adjacent two sides of adjacent rhombuses of adjacent sheets to form an alignment rhombus interweaving pattern, wherein adjacent sides of rhombuses with the same color are aligned to form the same-color alignment rhombus interweaving pattern, and adjacent sides of rhombuses with different colors are aligned to form different-color alignment rhombus interweaving patterns;
eighthly, three-wheel gluing and bonding, pressurizing, health preserving, edge sawing and end sealing: gluing the three-wheel assembly thin plate layer by using moisture-curing isocyanate glue, pressurizing the glued thin plate by using a flat press, maintaining the pressure for a certain time, then releasing the pressure, placing for health preservation, sawing and aligning the edges of the laminated material after the health preservation is finished to form a third laminated material with flat end surfaces, and uniformly coating the hot melt glue on two end surfaces of the third laminated material;
nine, three rounds of slicing: and planing the side surface of the third laminated material with the diamond interweaving pattern to obtain the recombined decorative veneer with the diamond interweaving pattern.
2. The method for manufacturing the rhombus interlaced pattern recombined decorative veneer according to claim 1, wherein the veneer in the step one is a poplar dyed veneer, the surface and core colors of the veneer are uniform, and the wood defects are removed; the water content of the single board is 40-50%, the thickness of the single board is 0.5-1.4mm, and the thickness of the single board in the same laminated wood is the same.
3. The method for manufacturing the diamond interlaced pattern recombined decorative veneer according to claim 1 or 2, wherein the coating weight of the moisture-curable isocyanate adhesive in the second step, the fifth step and the eighth step is 110-130g/m2。
4. The method for manufacturing a rhombus interlaced pattern recombined decorative veneer according to claim 3, wherein the predetermined pressure for the first round of pressurization in the second step is 1.3MPa, the predetermined pressure for the second round of pressurization in the fifth step is 1.2MPa, and the predetermined pressure for the third round of pressurization in the eighth step is 1.1 MPa; and step two, step five and step eight, the pressurization is carried out slowly, and the preset pressure is reached 60-90 seconds after the press is closed.
5. The method for manufacturing the rhombus interlaced pattern recombined decorative veneer according to claim 4, wherein the pressure maintaining time in the second step, the fifth step and the eighth step is 3 hours, and the curing time is 24 hours.
6. The method for manufacturing the diamond interlaced pattern recombined decorative veneer according to claim 5, wherein the sawing in the second step, the fifth step, the eighth step, the third step, and the sixth step all use a cemented carbide tipped planing saw with a side blade.
7. The method for manufacturing a reconstituted decorative veneer with a rhombus-shaped interweaving pattern according to claim 6, wherein the angle formed by the sawn surface and the surface veneer of the first laminated material in the third step is α degrees, and the range of α degrees is 30 degrees to α degrees to 60 degrees.
8. The method for manufacturing the rhombus interweaving pattern reconstituted decorative veneer according to claim 7, wherein the thickness of the hot melt adhesive in the step eight is 0.4-0.8 mm.
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| US5507905A (en) * | 1991-11-18 | 1996-04-16 | Kairi; Matti | Diagonal veneer laminate |
| CN100503187C (en) * | 2006-11-21 | 2009-06-24 | 郭源水 | Making method of hHandicraft plate made of bamboo |
| CN101456199A (en) * | 2008-12-31 | 2009-06-17 | 德华兔宝宝装饰新材股份有限公司 | Recombined decoration material of high emulation degree and manufacture method thereof |
| CN102837340A (en) * | 2011-06-23 | 2012-12-26 | 株式会社名南制作所 | Method for manufacturing diagonal plywood |
| CN104002348A (en) * | 2014-05-22 | 2014-08-27 | 福建农林大学 | Plate with rhombic decorative patterns and manufacturing method thereof |
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| CN107718182A (en) | 2018-02-23 |
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