CN109910417B - Metal compacting material based on high-frequency non-glue compacting technology and preparation method thereof - Google Patents
Metal compacting material based on high-frequency non-glue compacting technology and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims description 15
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- 238000005056 compaction Methods 0.000 claims abstract description 28
- 238000001816 cooling Methods 0.000 claims description 77
- 238000010438 heat treatment Methods 0.000 claims description 60
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims description 60
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- 230000001070 adhesive effect Effects 0.000 claims description 6
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Abstract
The invention relates to a metal compaction material and a method based on a high-frequency adhesive-free compaction technology, wherein the metal compaction material at least comprises a wood board layer and a metal layer which are thermally combined together through high frequency, and the bonding strength of the compacted wood board layer is more than 0.64 MPa; the compaction material provided by the invention has the advantages of high bonding strength, low moisture absorption recovery rate and low water immersion recovery rate.
Description
Technical Field
The invention belongs to the technical field of wood board processing, and particularly relates to a metal compacting material based on a high-frequency glue-free compacting technology and a preparation method thereof.
Background
In many specific scenes, such as partition walls of aircraft carriers, cab wall panels of tanks, fuselage materials of stealth airplanes and the like, wood and metal are required to be mixed for use, however, the existing materials are simply glued or mechanically connected through bolts, and when the same hardness requirement is met, the wood cost is higher (the wood is more expensive as the hardness is higher), so more and more metal and wood composite materials are researched, for example, a novel metal/wood composite material and a manufacturing method provided by Chinese patent CN1817585A, the method is to glue metal plates and wood single plates together through glue, the composite material prepared by the method has low peeling and is easy to cause the problem of glue failure when being cooled or preheated, Chinese patent CN101811314B provides an aluminum-wood composite plate and a processing method thereof, the method is to glue wood laminated plates and aluminum plates through EVA hot melt adhesive and the like, the composite board prepared by the method has a wood layer with high water absorption expansion rate, and the wood is easy to separate from a metal layer after absorbing a large amount of water, Chinese patent CN108608520A provides a high-strength plywood and a production process thereof, the process is that a metal sheet is provided with a convex thorn which comprises a plurality of blades, the blades on the convex thorn penetrate through a wood sheet layer to obtain the plywood, although the method can compound metal and wood, the compound effect is poor, and once the wood is soaked in water and expands greatly, the wood can be separated from the metal plate.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for preparing a metal compacting material based on a high-frequency (namely high-frequency) non-glue compacting technology, and the compacting material prepared by the method has high bonding strength, small water absorption expansion rate and small water absorption expansion rate.
The specific technical scheme of the invention is as follows:
the invention provides a metal compacting material based on a high-frequency glue-free compacting technology, which is prepared by the following steps:
A. and (3) laminating treatment: taking wood plates and metal plates, stacking the wood plates and the metal plates according to a direct pressure direction, and placing a PVB (polyvinyl butyral) intermediate film between the adjacent metal plates and the wood plates to obtain a laminated material;
B. and (3) heat seal treatment: heating the laminated material to 130-140 ℃ by using high frequency, preserving heat for 2-3 min, and carrying out pressurization treatment at a compression rate of 2-5% for 5-7 min to obtain a heat sealing material;
C. cooling treatment: cooling the surface of the board subjected to the heat sealing treatment to 70-90 ℃.
The metal plate of the invention adopts raw materials including but not limited to steel plate, iron plate, aluminum plate and alloy, the compacted wood is prepared by compacting Canadian maple, poplar, basswood, pine and the like by high frequency, and the compression ratio is 20-70%.
The invention also provides a metal compacting material based on the high-frequency non-glue compacting technology, and the preparation method of the metal compacting material comprises the following steps:
a. and (3) laminating treatment: taking wood plates and metal plates, stacking the wood plates and the metal plates according to a direct pressure direction, and placing a PVB (polyvinyl butyral) intermediate film between the adjacent metal plates and the wood plates to obtain a laminated material;
b. heating and pressurizing treatment: heating the laminated material to 100-140 ℃ by using high frequency, preserving heat for 8-30 min, and carrying out pressurization treatment at a compression rate of 30-40% for 15-20 min to obtain a heating and pressurizing material;
c. curing treatment: heating the heated and pressurized wood board to 180-220 ℃ by high frequency, and keeping the temperature for 5-8 min to prepare a curing material;
d. cooling treatment: cooling the surface of the board subjected to curing treatment to 70-90 ℃;
e. and (3) health preserving treatment: and (5) placing the material subjected to temperature reduction treatment for 15-20 days to obtain the metal compacting material.
The compacted material prepared by the method can obviously reduce the bonding strength of the wood board layer of the compacted material.
Further, in the stacking process of step a, the stacked material is prepared in the order of wood board/metal board/wood board, preferably, the size of two adjacent wood boards is larger than that of the metal board, and the sum of the reduced thicknesses of two adjacent wood boards after compression is not smaller than that of the metal board.
According to the invention, through the limitation, the metal plate can be quickly heated along with the wood plate when the high-frequency heating is carried out, so that the problems that the wood plate is burnt due to the fact that the temperature difference between the wood plate and the metal plate is too high, the temperature of the metal plate is not enough, and the temperature of the wood plate is too high are solved.
Further, the laminated material is prepared according to the sequence of wood boards/metal boards/wood boards in the step a, a wood frame is arranged between every two adjacent 2 wood boards, the metal boards are placed in the wood frame, the PVB intermediate film is partially or completely placed in the wood frame, and the height of the wood frame is larger than the thickness of the metal boards.
According to the invention, through the limitation, the metal plate can be quickly heated along with the temperature of the wood plate when the high-frequency heating is carried out, so that the problem that the wood plate is burnt due to the fact that the temperature difference between the wood plate and the metal plate is too high, the temperature of the metal plate is not enough, and the temperature of the wood plate is too high is solved.
Further, the heat preservation time in the step b is 25-30 min.
Because the metal plate is not easy to be heated by high frequency, the invention can heat the wood plate and the metal plate uniformly by the heat preservation time, thereby further improving the bonding strength.
Further, in the lamination process of step a, the laminated material is prepared in the order of metal plate/wood plate/metal plate, and the metal plate is preheated to a metal plate surface temperature of 120 ℃ to 160 ℃ before the lamination process.
By pretreating the metal plate, the temperature difference between the wood plate and the metal plate can be shortened, the metal plate is rapidly heated, and the bonding strength is further improved.
Further, the heating and pressurizing treatment is to control the water content of the board to be 4-5% when the heating and pressurizing board is heated to 130 ℃ by high frequency.
The step is realized by arranging a screen between the lower pressing plate and the bottommost layer of compaction wood, and water generated in the compaction process flows out through the screen, so that the water content is reduced to 4-5%.
Further, the cooling treatment in the step d specifically comprises the following steps:
d1. cooling the solidified wood board to the surface temperature of 130-140 ℃ by a water cooling technology, wherein the water flow rate is 3-5 m/s;
d2. the water-cooled solidified wood board is cooled to the surface temperature of 70-90 ℃ by using an air cooling technology, the air cooling temperature is 50-60 ℃, and the angle between the air cooling direction and the side wall of the metal board is 60-90 degrees.
The invention can obviously reduce the water absorption expansion rate of the compaction material by specifically limiting the temperature reduction treatment step.
Further, the PVB intermediate film has a thickness of 0.7mm to 0.9mm, a viscosity of 18.5 Pa.s to 19.5 Pa.s, and an elastic modulus of 70 to 90X 106Pa, and the area ratio of the contact surface of the wood board and the PVB intermediate film is 1:2-2: 1.
The invention can further reduce the water absorption expansion rate of the compaction material by specifically limiting each parameter of the PVB film.
The metal compaction material provided by the invention at least comprises a wood board layer and a metal layer which are thermally combined together through high frequency, and the bonding strength of the compaction wood board layer and the metal layer is more than 0.64 MPa.
The metal compaction material prepared by the preparation method based on the high-frequency non-glue compaction technology has the characteristics of high bonding strength, small water absorption expansion rate and small water absorption expansion rate.
Drawings
Fig. 1 is a diagram showing a metal compact material obtained by separately compacting metals by a high-frequency non-adhesive compacting technique.
Detailed Description
Example 1
The embodiment provides a metal compacting material, and a preparation method of the metal compacting material comprises the following steps:
a. and (3) laminating treatment: taking wood plates and metal plates, stacking the wood plates and the metal plates according to a direct pressure direction, and placing a PVB (polyvinyl butyral) intermediate film between the adjacent metal plates and the wood plates to obtain a laminated material;
b. heating and pressurizing treatment: heating the laminated material to 100 ℃ by using high frequency, preserving heat for 8min, and carrying out pressurization treatment at a compression rate of 30% for 15min to obtain a heating and pressurizing material;
c. curing treatment: heating the heated and pressurized wood board to 180 ℃ by using high frequency, and keeping the temperature for 5min to prepare a curing material;
d. cooling treatment: cooling the surface of the board subjected to curing treatment to 70 ℃;
e. and (3) health preserving treatment: placing the cooled material for 15 days to obtain a metal compaction material;
wherein, the cooling treatment in the step d specifically comprises the following steps:
d1. cooling the solidified wood board to the surface temperature of 130 ℃ by a water cooling technology, wherein the water flow rate is 3 m/s;
d2. cooling the water-cooled cured wood board to the surface temperature of 70 ℃, the air cooling temperature of 50 ℃ and the angle between the air cooling direction and the side wall of the metal plate of 60 degrees by using an air cooling technology;
in the embodiment, two wood boards and a metal board are adopted, the length and the width of the wood board and the PVB film are the same as those of the metal board and are 0.6m and 0.4m respectively, the wood board is made of Canadian maple and has the thickness of 10cm and the water content of 12%, and the metal board is made of an aluminum board and has the thickness of 5 cm;
the PVB intermediate film has a thickness of 0.7mm, a viscosity of 18.5 Pa.s and an elastic modulus of 70 x 106Pa, the area ratio of the contact surface of the wood board and the PVB intermediate film is 1: 1;
the PVB films of the present invention were purchased from Shanghai Meibang plastics, Inc.
Example 2
The embodiment provides a metal compacting material, and a preparation method of the metal compacting material comprises the following steps:
a. and (3) laminating treatment: taking wood plates and metal plates, stacking the wood plates and the metal plates according to a direct pressure direction, and placing a PVB (polyvinyl butyral) intermediate film between the adjacent metal plates and the wood plates to obtain a laminated material;
b. heating and pressurizing treatment: heating the laminated material to 135 ℃ by using high frequency, preserving heat for 15min, and carrying out pressurization treatment at a compression rate of 35% for 18min to obtain a heating and pressurizing material;
c. curing treatment: heating the heated and pressurized wood board to 200 ℃ by using high frequency, and keeping the temperature for 8min to obtain a curing material;
d. cooling treatment: cooling the surface of the board subjected to curing treatment to 120 ℃;
e. and (3) health preserving treatment: placing the cooled material for 15 days to obtain a metal compaction material;
wherein, the cooling treatment in the step d specifically comprises the following steps:
d1. cooling the solidified wood board to the surface temperature of 135 ℃ by a water cooling technology, wherein the water flow rate is 4 m/s;
d2. cooling the water-cooled cured wood board to the surface temperature of 80 ℃, the air cooling temperature of 55 ℃ and the angle between the air cooling direction and the side wall of the metal plate of 75 degrees by using an air cooling technology;
in the embodiment, two wood boards and a metal board are adopted, the length and the width of the wood board and the PVB film are the same as those of the metal board and are 0.6m and 0.4m respectively, the wood board is made of Canadian maple and has the thickness of 10cm and the water content of 12%, and the metal board is made of an aluminum board and has the thickness of 5 cm;
the PVB intermediate film has the thickness of 0.8mm, the viscosity of 19.0 Pa.s and the elastic modulus of 80 multiplied by 106Pa, and the area ratio of the contact surface of the wood board and the PVB intermediate film is 1: 1.
Example 3
The embodiment provides a metal compacting material, and a preparation method of the metal compacting material comprises the following steps:
a. and (3) laminating treatment: taking wood plates and metal plates, stacking the wood plates and the metal plates according to a direct pressure direction, and placing a PVB (polyvinyl butyral) intermediate film between the adjacent metal plates and the wood plates to obtain a laminated material;
b. heating and pressurizing treatment: heating the laminated material to 140 ℃ by using high frequency, preserving heat for 30min, and carrying out pressurization treatment at a compression rate of 40% for 20min to obtain a heating and pressurizing material;
c. curing treatment: heating the heated and pressurized wood board to 220 ℃ by using high frequency, and keeping the temperature for 8min to obtain a cured material;
d. cooling treatment: cooling the surface of the board subjected to curing treatment to 90 ℃;
e. and (3) health preserving treatment: placing the cooled material for 15 days to obtain a metal compaction material;
wherein, the cooling treatment in the step d specifically comprises the following steps:
d1. cooling the solidified wood board to the surface temperature of 140 ℃ by a water cooling technology, wherein the water flow rate is 5 m/s;
d2. cooling the water-cooled cured wood board to the surface temperature of 90 ℃, the air cooling temperature of 60 ℃ and the angle between the air cooling direction and the side wall of the metal plate of 90 degrees by using an air cooling technology;
in the embodiment, two wood boards and a metal board are adopted, the length and the width of the wood board and the PVB film are the same as those of the metal board and are 0.6m and 0.4m respectively, the wood board is made of Canadian maple and has the thickness of 10cm and the water content of 12%, and the metal board is made of an aluminum board and has the thickness of 5 cm;
the PVB intermediate film has a thickness of 0.9mm, a viscosity of 19.5 Pa.s and an elastic modulus of 90 x 106Pa, and the area ratio of the contact surface of the wood board and the PVB intermediate film is 1: 1.
Example 4
Metal this example provides a metal compacted material prepared by the process including all the steps of example 1, except that,
adopting a wood board/a metal board/a wood board in the laminating treatment of the step a, wherein the length and the width of the wood board are respectively 0.5m and 0.3m, the length and the width of the metal board are respectively 0.4m and 0.2m, and the length and the width of the PVB film are respectively 0.4m and 0.2 m; the metal plate in this embodiment is an aluminum plate.
Example 5
Metal this example provides a metal compacted material prepared by the process including all the steps of example 1, except that,
step a the range upon range of mode of adopting plank/metal sheet/plank in range upon range of processing, set up the wooden frame between 2 adjacent planks, the metal sheet is placed in the wooden frame, the length and the width of plank are 0.5m and 0.3m respectively, and the length and the width of metal sheet are 0.4m and 0.2m respectively, and the length and the width of PVB membrane are 0.4m and 0.2m respectively, PVB intermediate coat is whole to be placed in the wooden frame, the height of wooden frame is 6cm, and the thickness of metal plate is 5cm, and the metal sheet in this embodiment adopts magnesium aluminum alloy.
Example 6
This example provides a metal compacted material prepared by the method including all the steps of example 1, except that,
heating and compressing treatment is also included between the heating and pressurizing treatment and the curing treatment, wherein the heating and compressing treatment is to heat the heating and pressurizing wood board to 130 ℃ by high frequency and preserve heat until the water content of the wood board is 4%.
Example 7
This example provides a metal compacted material prepared by the method including all the steps of example 1, except that,
the heating and pressurizing treatment is to control the water content of the wood board to be 4.5 percent when the heating and pressurizing wood board is heated to 135 ℃ by high frequency.
Example 8
This example provides a metal compacted material prepared by the method including all the steps of example 1, except that,
the heating and pressurizing treatment is to control the water content of the wood board to be 5 percent when the heating and pressurizing wood board is heated to 140 ℃ by high frequency.
Example 9
The embodiment provides a metal compacting material, and a preparation method of the metal compacting material comprises the following steps:
A. and (3) laminating treatment: taking wood plates and metal plates, stacking the wood plates and the metal plates according to a direct pressure direction, and placing a PVB (polyvinyl butyral) intermediate film between the adjacent metal plates and the wood plates to obtain a laminated material;
B. and (3) heat seal treatment: heating the laminated material to 135 ℃ by using high frequency, preserving heat for 2.5min, and carrying out pressurization treatment at the compression rate of 3.5% for 6min to obtain a heat sealing material;
C. cooling treatment: cooling the surface of the board subjected to heat sealing treatment to 80 ℃;
in the embodiment, a piece of compacted wood and a piece of metal plate are adopted, the PVB film has the same area as the metal plate and the compacted wood plate, the compacted wood is prepared by high-frequency compaction by using radiata pine, the compression ratio is 30%, the thickness of the compacted wood is 12cm, the water content is 8%, the metal plate is an aluminum plate, the thickness is 5.2cm, and the length and the width of the compacted wood and the aluminum plate are both 0.28m and 0.22 m;
the PVB intermediate film has a thickness of 0.9mm, a viscosity of 19.5 Pa.s and an elastic modulus of 90 x 106Pa, and the area ratio of the contact surface of the compacted wood and the PVB intermediate film is 1: 1.
Example 10
This example provides a metal compacted material prepared by the method including all the steps of example 9, except that,
in the lamination treatment of the metal plate/wood plate/metal plate, the metal plate is preheated to the surface temperature of the metal plate of 140 ℃ before lamination treatment.
Comparative example 1
The embodiment provides a metal compacting material, and a preparation method of the metal compacting material comprises the following steps:
a. and (3) laminating treatment: taking wood plates and metal plates, stacking the wood plates and the metal plates according to a direct pressure direction, and placing a PVB (polyvinyl butyral) intermediate film between the adjacent metal plates and the wood plates to obtain a laminated material;
b. heating and pressurizing treatment: heating the laminated material to 80 ℃ by using high frequency, preserving heat for 30min, and carrying out pressurization treatment at a compression rate of 20% for 30min to obtain a heating and pressurizing material;
c. curing treatment: heating the heated and pressurized wood board to 160 ℃ by high frequency, and keeping the temperature for 5min to obtain a cured material;
d. cooling treatment: cooling the surface of the board subjected to curing treatment to 80 ℃;
e. and (3) health preserving treatment: placing the cooled material for 15 days to obtain a metal compaction material;
wherein, the cooling treatment in the step d specifically comprises the following steps:
d1. cooling the solidified wood board to the surface temperature of 135 ℃ by a water cooling technology, wherein the water flow rate is 4 m/s;
d2. cooling the water-cooled cured wood board to the surface temperature of 80 ℃, the air cooling temperature of 55 ℃ and the angle between the air cooling direction and the side wall of the metal plate of 75 degrees by using an air cooling technology;
the PVB film has the same area as the metal plate and the wood plate, the wood plate is made of basswood, the thickness of the wood plate is 10cm, the water content of the wood plate is 12%, and the metal plate is made of a steel plate, and the thickness of the metal plate is 5 cm;
the PVB intermediate film has the thickness of 0.8mm, the viscosity of 19.0 Pa.s and the elastic modulus of 80 multiplied by 106Pa, and the area ratio of the contact surface of the wood board and the PVB intermediate film is 1: 1.
Comparative example 2
The embodiment provides a metal compacting material, and a preparation method of the metal compacting material comprises the following steps:
a. and (3) laminating treatment: taking wood plates and metal plates, stacking the wood plates and the metal plates according to a direct pressure direction, and placing a PVB (polyvinyl butyral) intermediate film between the adjacent metal plates and the wood plates to obtain a laminated material;
b. heating and pressurizing treatment: heating the laminated material to 130 ℃ by using high frequency, preserving heat for 15min, and carrying out pressurization treatment at a compression rate of 35% for 18min to obtain a heating and pressurizing material;
c. curing treatment: heating the heated and pressurized wood board to 200 ℃ by using high frequency, and keeping the temperature for 8min to obtain a curing material;
d. cooling treatment: cooling the surface of the board subjected to curing treatment to 80 ℃;
e. and (3) health preserving treatment: placing the cooled material for 15 days to obtain a metal compaction material;
wherein, the cooling treatment in the step d specifically comprises the following steps: cooling the solidified wood board to the surface temperature of 80 ℃, the air cooling temperature of 55 ℃ and the angle between the air cooling direction and the side wall of the metal plate of 40 degrees by using an air cooling technology;
the PVB film has the same area as the metal plate and the wood plate, the wood plate is made of basswood, the thickness of the wood plate is 10cm, the water content of the wood plate is 12%, and the metal plate is made of a steel plate, and the thickness of the metal plate is 5 cm;
the PVB intermediate film has the thickness of 0.8mm, the viscosity of 19.0 Pa.s and the elastic modulus of 80 multiplied by 106Pa, the area ratio of the contact surface of the wood board and the PVB intermediate filmIs 1: 1.
Comparative example 3
The embodiment provides a metal compacting material, and a preparation method of the metal compacting material comprises the following steps:
f. and (3) laminating treatment: taking wood plates and metal plates, stacking the wood plates and the metal plates according to a direct pressure direction, and placing a PVB (polyvinyl butyral) intermediate film between the adjacent metal plates and the wood plates to obtain a laminated material;
g. heating and pressurizing treatment: heating the laminated material to 120 ℃ by using high frequency, preserving heat for 15min, and carrying out pressurization treatment at a compression rate of 35% for 18min to obtain a heating and pressurizing material;
h. curing treatment: heating the heated and pressurized wood board to 200 ℃ by using high frequency, and keeping the temperature for 8min to obtain a curing material;
i. cooling treatment: cooling the surface of the board subjected to curing treatment to 80 ℃;
j. and (3) health preserving treatment: placing the cooled material for 15 days to obtain a metal compaction material;
wherein, the cooling treatment in the step d specifically comprises the following steps: cooling the solidified wood board to the surface temperature of 90 ℃ by using a water cooling technology, wherein the water flow speed is 4 m/s;
the PVB film has the same area as the metal plate and the wood plate, the wood plate is made of basswood, the thickness of the wood plate is 10cm, the water content of the wood plate is 12%, and the metal plate is made of a steel plate, and the thickness of the metal plate is 5 cm;
the PVB intermediate film has the thickness of 0.8mm, the viscosity of 19.0 Pa.s and the elastic modulus of 80 multiplied by 106Pa, and the area ratio of the contact surface of the wood board and the PVB intermediate film is 1: 1.
Comparative example 4
The embodiment provides a metal compacting material, and a preparation method of the metal compacting material comprises the following steps:
a. and (3) laminating treatment: taking wood plates and metal plates, stacking the wood plates and the metal plates according to a direct pressure direction, and placing a PVB (polyvinyl butyral) intermediate film between the adjacent metal plates and the wood plates to obtain a laminated material;
b. heating and pressurizing treatment: heating the laminated material to 120 ℃ by using high frequency, preserving heat for 15min, and carrying out pressurization treatment at a compression rate of 35% for 18min to obtain a heating and pressurizing material;
c. curing treatment: heating the heated and pressurized wood board to 200 ℃ by using high frequency, and keeping the temperature for 8min to obtain a curing material;
d. cooling treatment: cooling the surface of the board subjected to curing treatment to 70 ℃;
e. and (3) health preserving treatment: placing the cooled material for 15 days to obtain a metal compaction material;
wherein, the cooling treatment in the step d specifically comprises the following steps:
d1. cooling the solidified wood board to the surface temperature of 135 ℃ by a water cooling technology, wherein the water flow rate is 4 m/s;
d2. cooling the water-cooled cured wood board to the surface temperature of 80 ℃, the air cooling temperature of 55 ℃ and the angle between the air cooling direction and the side wall of the metal plate of 75 degrees by using an air cooling technology;
the PVB film has the same area as the metal plate and the wood plate, the wood plate is made of basswood, the thickness of the wood plate is 10cm, the water content of the wood plate is 12%, and the metal plate is made of a steel plate, and the thickness of the metal plate is 5 cm;
the thickness of the PVB intermediate film is 0.5mm, the viscosity is 10.0 Pa.s, and the elastic modulus of the PVB intermediate film is 80 multiplied by 106Pa, and the area ratio of the contact surface of the wood board and the PVB intermediate film is 1: 1.
Comparative example 5
This example provides a metal compacted material prepared by the method including all the steps of example 1, except that,
heating and compressing treatment is also included between the heating and pressurizing treatment and the curing treatment, wherein the heating and compressing treatment is to heat the heating and pressurizing wood board to 160 ℃ by high frequency and preserve heat until the water content of the wood board is 10%.
Comparative example 6
This example provides a metal compacted material prepared by the method including all the steps of example 1, except that,
heating and compressing treatment is also included between the heating and pressurizing treatment and the curing treatment, wherein the heating and compressing treatment is to heat the heating and pressurizing wood board to 120 ℃ by high frequency and preserve heat until the water content of the wood board is 2%.
Test example 1 bond Strength test
Measuring the bonding strength of the compaction materials or the composite boards of the test 1-4 groups and the comparison 1-4 groups by using a bonding strength detector (purchased from Shanghai Tilt technical instruments science and technology Co., Ltd.), wherein the compaction materials of the examples 1-3 and 10 are adopted in the test 1-4 groups, the compaction material prepared in the comparison 1 group is adopted in the comparison 1 group, and the composite boards prepared in Chinese patents CN1817585A, CN101811314B and CN108608520A are adopted in the comparison 2-4 groups; each compacted material was sampled in 5 replicates, and the results were averaged and are reported in table 1.
TABLE 1 measurement results of adhesive strength of each set of compacted materials
| Group of | Adhesive Strength (MPa) |
| Example 1 | 0.65 |
| Example 2 | 0.67 |
| Example 3 | 0.73 |
| Example 10 | 0.81 |
| Comparative example 1 | 0.45 |
| Comparative example 2 | 0.29 |
| Comparative example 3 | 0.36 |
| Comparative example 4 | 0.27 |
As can be seen from table 1, the compression material prepared by the method of the present invention has higher adhesive strength and higher effect than the four comparative examples, and when the metal plate is pretreated with high frequency and then subjected to high frequency heating compression with the wood plate, the adhesive strength can be further improved.
Test example 2 Water swelling Rate test
The compacted materials obtained in examples 1 to 3 and comparative examples 2 to 4 were placed in a constant temperature and humidity test chamber, after the mass was constant (each compacted material was weighed for 24 hours and then weighed twice, the mass difference between the two weighed masses was less than 1% of the mass of the compacted material, which was regarded as constant), the thickness of the center of each compacted material was measured, each compacted material was immersed in a water bath having a pH of 7 ± 1 and a temperature of 20 ± 2 ℃, the compacted material was perpendicular to the horizontal plane, the upper surface of the compacted material was kept lower than the water surface, the distance between the lower surface of the compacted material and the bottom of the water bath was 10cm, each compacted material was not in contact with each other, the total immersion was carried out for 24 hours, each compacted material was taken out, the surface water stain was removed, the thickness of the center of each compacted material was measured within 30 minutes, and the water absorption expansion rate T (%) was calculated, which was the ratio of the difference between the thickness before and after the expansion of the wood and the thickness before and after the compaction, the test results are shown in Table 2.
TABLE 2 measurement results of water absorption expansion ratios of respective compaction materials
| Group of | Water swelling Rate (%) |
| Example 1 | 0.2 |
| Example 2 | 0.1 |
| Example 3 | 0.1 |
| Comparative example 2 | 6.8 |
| Comparative example 3 | 5.4 |
| Comparative example 4 | 7.6 |
As can be seen from table 2, the thickness expansion rates of examples 1 to 3 are all lower than those of comparative examples 2 to 4, and it is proved that the temperature reduction treatment method and the PVB intermediate film provided by the present invention can significantly reduce the water absorption expansion rate of the compression material.
Test example 3 hygroexpansivity and temperature expansion test
The compacted materials of examples 2, 6 to 8 and comparative examples 5 to 6 were allowed to stand at a relative humidity of 90% for 150 days to measure the hygroexpansivity, and the compacted materials of examples 2, 6 to 8 and comparative examples 5 to 6 were allowed to stand at a relative temperature of 60 ℃ for 30 days to measure the high-temperature expansion rate.
Moisture absorption expansion ratio: the ratio of the difference between the thickness of the compaction material before and after expansion to the thickness of the compaction material before expansion is the hygroscopic expansion coefficient, the high temperature expansion coefficient: the ratio of the difference in thickness of the compacted material before and after expansion to the thickness before expansion is shown in Table 3.
TABLE 3 determination of hygroexpansivity test results
| Group of | Hygroexpansion Rate (%) | High temperature expansion ratio (%) |
| Example 2 | 1.9 | 0.9 |
| Example 6 | 0.2 | 0.2 |
| Example 7 | 0.3 | 0.1 |
| Example 8 | 0.2 | 0.1 |
| Comparative example 5 | 1.6 | 0.9 |
| Comparative example 6 | 1.8 | 0.8 |
As can be seen from table 3, the method provided by the present invention can significantly reduce the hygroexpansivity and the high-temperature expansion rate of the compacted material by adding the temperature-increasing compression step, and when the parameters in the temperature-increasing compression step are changed, the hygroexpansivity and the high-temperature expansion rate of the compacted material will be increased.
Test example 4 burnt degree test
The compacting materials were prepared according to the preparation methods of examples 2 to 5, and metal compacting materials were prepared using a conventional hot press plate instead of the high frequency as a comparative example 7, other parameters were the same as those of example 2 of the present invention, and the area percentages of scorch of the upper and lower wood plates were observed after successful pressing, and the test results are shown in table 4.
TABLE 4 determination of hygroexpansivity test results
| Group of | Burnt area (%) |
| Example 2 | 8.8 |
| Example 3 | 9.3 |
| Example 4 | 0 |
| Example 5 | 0 |
| Comparative example 7 | 23.6 |
As can be seen from table 4, by disposing a wood frame between two adjacent wood boards or limiting the lengths, widths, and thicknesses of the wood boards and the metal boards according to the method provided by the present invention, the problem of scorching during the compacting process can be effectively avoided, and at the same time, if the high frequency technology is replaced with a conventional hot-press board, the problem of scorching over a large area is generated.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (8)
1. A preparation method of a metal compacting material based on a high-frequency non-glue compacting technology is characterized in that the metal compacting material is prepared by the following steps:
a. and (3) laminating treatment: taking wood plates and metal plates, stacking the wood plates and the metal plates according to a direct pressure direction, and placing a PVB (polyvinyl butyral) intermediate film between the adjacent metal plates and the wood plates to obtain a laminated material;
b. heating and pressurizing treatment: heating the laminated material to 130-140 ℃ by using high frequency, preserving heat for 8-30 min, and carrying out pressurization treatment at a compression rate of 30-40% for 15-20 min to obtain a heating and pressurizing material;
c. curing treatment: heating the heated and pressurized wood board to 180-220 ℃ by high frequency, and keeping the temperature for 5-8 min to prepare a curing material;
d. cooling treatment: cooling the surface of the board subjected to curing treatment to 70-90 ℃;
e. and (3) health preserving treatment: placing the cooled material for 15-20 days to obtain a metal compaction material;
wherein, the cooling treatment in the step d specifically comprises the following steps:
d1. cooling the solidified wood board to the surface temperature of 130-140 ℃ by a water cooling technology, wherein the water flow rate is 3-5 m/s;
d2. the water-cooled solidified wood board is cooled to the surface temperature of 70-90 ℃ by using an air cooling technology, the air cooling temperature is 50-60 ℃, and the angle between the air cooling direction and the side wall of the metal board is 60-90 degrees.
2. The method of claim 1, wherein in the laminating process of the step a, the laminated material is manufactured in the order of wood board/metal board/wood board, the size of each of the adjacent two wood boards is larger than that of the metal board, and the sum of the reduced thicknesses of the adjacent two wood boards after compression is not smaller than that of the metal board.
3. The method of claim 2, wherein the laminate is prepared in the order of wood board/metal board/wood board in step a, a wood frame is disposed between 2 adjacent wood boards, the metal board is placed in the wood frame, the PVB interlayer film is partially or completely placed in the wood frame, and the height of the wood frame is greater than the thickness of the metal board.
4. The method according to claim 1, wherein the lamination process of step a is a process in which the laminated material is produced in the order of metal plate/wood plate/metal plate, and the metal plate is preheated to a metal plate surface temperature of 120 ℃ to 160 ℃ before the lamination process.
5. The method of claim 4, wherein the holding time in step b is 25-30 min.
6. The manufacturing method according to claim 1, wherein the heating and pressurizing treatment controls the water content of the wood board to 4% -5% when the heated and pressurized wood board is heated to 130 ℃ -140 ℃ by high frequency.
7. The process of claim 1, wherein the PVB interlayer has a thickness of from 0.7mm to 0.9mm and the PVB interlayer has an elastic modulus of 70 x 106Pa-90×106Pa, the wood board andthe area ratio of the contact surface of the PVB intermediate film is 1:2-2: 1.
8. A metal press material based on the high-frequency non-adhesive press technology manufactured by the manufacturing method as set forth in any one of claims 1 to 7, comprising at least a wood board layer and a metal layer which are subjected to high-frequency heat bonding, the wood board and the metal board having a bonding strength of more than 0.64 MPa.
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| CN201910181352.4A CN109910417B (en) | 2019-03-11 | 2019-03-11 | Metal compacting material based on high-frequency non-glue compacting technology and preparation method thereof |
| JP2019109294A JP6815585B2 (en) | 2019-03-11 | 2019-06-12 | Manufacturing method of metal compaction material based on high frequency non-adhesive consolidation technology and its metal consolidation material |
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| CN201910181352.4A CN109910417B (en) | 2019-03-11 | 2019-03-11 | Metal compacting material based on high-frequency non-glue compacting technology and preparation method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB563097A (en) * | 1943-04-16 | 1944-07-28 | Bruno Jablonsky | Improved method of treating material under heat and pressure |
| GB726359A (en) * | 1952-05-23 | 1955-03-16 | Bostadsforskning Ab | Improvements in or relating to high frequency heating systems |
| TW460373B (en) * | 1999-12-23 | 2001-10-21 | Akzo Nobel Nv | Method and apparatus for the manufacture of glued structures |
| CN1354300A (en) * | 2000-11-20 | 2002-06-19 | 兆骏股份有限公司 | Combination method of cloth material and additional material |
| CN1362315A (en) * | 2000-12-30 | 2002-08-07 | 德华建材(苏州)有限公司 | Making process of artificial square pillar timber |
| CN1817585A (en) * | 2006-03-15 | 2006-08-16 | 嘉善高雄木业有限公司 | Metal/wooden composite materials and production thereof |
| CN103753664A (en) * | 2013-02-04 | 2014-04-30 | 中国林业科学研究院木材工业研究所 | Compressed wood and preparation method thereof |
| CN203821784U (en) * | 2014-05-12 | 2014-09-10 | 江苏德威木业有限公司 | Plate capable of conducting heat fast |
-
2019
- 2019-03-11 CN CN201910181352.4A patent/CN109910417B/en active Active
- 2019-06-12 JP JP2019109294A patent/JP6815585B2/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB563097A (en) * | 1943-04-16 | 1944-07-28 | Bruno Jablonsky | Improved method of treating material under heat and pressure |
| GB726359A (en) * | 1952-05-23 | 1955-03-16 | Bostadsforskning Ab | Improvements in or relating to high frequency heating systems |
| TW460373B (en) * | 1999-12-23 | 2001-10-21 | Akzo Nobel Nv | Method and apparatus for the manufacture of glued structures |
| CN1354300A (en) * | 2000-11-20 | 2002-06-19 | 兆骏股份有限公司 | Combination method of cloth material and additional material |
| CN1362315A (en) * | 2000-12-30 | 2002-08-07 | 德华建材(苏州)有限公司 | Making process of artificial square pillar timber |
| CN1817585A (en) * | 2006-03-15 | 2006-08-16 | 嘉善高雄木业有限公司 | Metal/wooden composite materials and production thereof |
| CN103753664A (en) * | 2013-02-04 | 2014-04-30 | 中国林业科学研究院木材工业研究所 | Compressed wood and preparation method thereof |
| CN203821784U (en) * | 2014-05-12 | 2014-09-10 | 江苏德威木业有限公司 | Plate capable of conducting heat fast |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6815585B2 (en) | 2021-01-20 |
| CN109910417A (en) | 2019-06-21 |
| JP2020147024A (en) | 2020-09-17 |
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