JP6815585B2 - Manufacturing method of metal compaction material based on high frequency non-adhesive consolidation technology and its metal consolidation material - Google Patents

Description

The present invention belongs to the field of wood board processing technology, and particularly relates to a method for producing a metal compaction material based on a high frequency non-adhesive consolidation technology.

Many specific cases, such as the partition walls of the carrier, the wall panels of the tank cockpit, and the materials of the stealth aircraft's fuselage, all require the use of a mixture of wood and metal, but traditional materials are simple glues. When they are mechanically connected with an agent or bolt and have the same hardness, the cost of wood is high (generally, the higher the hardness, the higher the wood), so composite materials of metal and wood have been studied, for example, patent documents. The new metal / wood composite material and manufacturing method proposed in 1 is that the metal plate and the wood single plate are bonded with an adhesive, and the peeling of the manufactured composite material is very low, and when it gets cold or preheated, the adhesive is used. Is likely to expire. The aluminum-wood composite board and its processing method proposed in Patent Document 2 have a high water absorption and expansion rate of the wood layer of the composite board manufactured by adhering the wood layer board and the aluminum board with an EVA hot melt adhesive or the like. When a large amount of water is absorbed by wood, it becomes easy to separate from the metal layer. The high-strength veneer plywood and its production process proposed in Patent Document 3 are produced by providing a convex stab containing a plurality of blades on a metal piece and penetrating the blade in the convex stab through a thin plate layer of wood. Although it is possible to combine wood with wood, the composite effect is low, and when the wood is flooded and expands significantly, the wood comes off the metal plate.

Chinese patent CN1817585A Chinese patent CN10181314B Chinese patent CN1086085220A

In order to solve the above technical problems, the present invention provides a method for producing a metal compaction material based on a high frequency (harmonic) non-adhesive consolidation technology. The consolidation material produced by this method has high adhesive strength, low moisture absorption swelling rate, and low water absorption swelling rate.

Specific technical solutions of the present invention are as follows.

The present invention provides a method for producing a metal compaction material based on a high-frequency non-adhesive consolidation technique produced in the following steps.

A. Laminating treatment: A wooden board and a metal plate are directly laminated and left in the pressure direction, and an interlayer film of PVB is laid between the adjacent metal plate and the wooden board to prepare a laminated material.

B. Heat-sealing treatment: The laminated material is heated to 130 ° C.-140 ° C. at a high frequency, kept warm for 2 min-3min, pressurized at a compressibility of 2-5%, and kept warm for 5-7min to prepare a heat-sealing material. ..

C. Temperature lowering treatment: The heat-sealed wood board surface is cooled to 70-90 ° C.

The raw materials used for the metal plate of the present invention include, but are not limited to, steel plates, iron plates, aluminum plates, and alloys, and the compacted wood is high-frequency consolidated wood such as Canadian maple, poplar, linden wood, and pine wood. And the compression ratio was 20-70%.

The present invention further provides a method for producing a metal compacted material based on a high frequency non-adhesive consolidation technique, and the method for producing the metal compacted material includes the following steps.

a. Laminating treatment: A wooden board and a metal plate are directly laminated and left in the pressure direction, and an interlayer film of PVB is laid between the adjacent metal plate and the wooden board to prepare a laminated material.

b. Heat-pressurization treatment: The laminated material is heated to 100 ° C.-140 ° C. at a high frequency, kept warm for 8-30 minutes, pressurized at a compression rate of 30-40%, kept warm-pressed for 15-20 min, and combined by heating. To make.

c. Hardening treatment: The wood board that has been heat-pressurized is heated at a high frequency to a wood board temperature of 180-220 ° C. and kept warm for 5-8 minutes to prepare a hardened wood board.

d. Temperature lowering treatment: The surface of the hardened wood board is cooled to 70-90 ° C.

e. Curing treatment: The temperature-reduced wooden board is left for 15 to 20 days to obtain a metal compaction material.

In the present invention, the consolidation material produced by the above method can significantly reduce the adhesive strength of the wood board layer of the consolidation material.

Further, in the laminating process of step a, the laminated material is produced in the order of wood board / metal board / wood board, and preferably, the dimensions of the two adjacent wood boards are both larger than the dimensions of the metal board. The sum of the thicknesses of two adjacent wooden boards that are compressed and reduced is not less than the thickness of the metal boards.

According to the above limitation, when heating at high frequency, the temperature of the metal plate is rapidly raised according to the temperature of the wood plate, the temperature difference between the wood plate and the metal plate is too high, the temperature of the metal plate is insufficient, and the temperature of the wood plate is high. Is too expensive to avoid the problem of burning the wood board. The mechanism is that while the wood material is easily heated at high frequency, the metal plate is not easily heated at high frequency. Therefore, in the present invention, the sum of the reduced thicknesses after the wood plate is compressed is limited to not being smaller than the thickness of the metal plate. As a result, the two adjacent wooden boards come into contact with each other at the time of heating and compression, so that the metal plate is wrapped in the wooden board, and the temperature rise rate of the metal plate can be increased.

Further, the laminated material is produced in the order of the wooden board / metal board / wooden board in step a, a wooden frame is installed between two adjacent wooden boards, the metal plate is placed on the wooden frame, and the PVB interlayer film is applied. Part or all of it is placed in a wooden frame, and the height of the wooden frame is larger than the thickness of the metal plate.

According to the above limitation, the metal plate is rapidly heated according to the temperature rise of the wood plate at the time of high frequency heating, the temperature difference between the wood plate and the metal plate is too high, the temperature of the metal plate is insufficient, and the temperature of the wood plate is high. Avoid the problem of burning the wood board if it is too high. The mechanism is that while wood materials are easily heated at high frequencies, metal plates are not easily heated at high frequencies. Therefore, in the present invention, by providing a wooden frame between two wooden boards, the wooden frame and the wooden board are brought into contact with each other during heating, resulting in high frequency. Since the wooden board and the wooden frame are heated at the same time during heating and the metal plate is wrapped in a high temperature, the heating rate of the metal plate is increased.

Further, the heat retention time in step b is 25 to 30 min.

Since the metal plate is not easily heated at a high frequency, in the present invention, the wood plate and the metal plate are uniformly heated over the heat retention time, and the adhesive strength can be further increased.

Further, in the laminating treatment of step a, the laminated material is produced in the order of metal plate / wood plate / metal plate, and the metal plate is preheated to a surface temperature of 120 ° C.-160 ° C. of the metal plate before the laminating treatment.

By pretreating the metal plate, the temperature difference between the wooden plate and the metal plate at the time of temperature rise can be reduced, the temperature of the metal plate can be rapidly increased, and the adhesive strength can be further increased.

Further, the heat-pressurized wood is heated to 130 ° C. at a high frequency to have a moisture content of 4-5%.

This step is realized by installing a screen between the bottom press plate and the consolidated tree in the bottom layer, and the water generated during consolidation flows out through the screen, and the moisture content becomes 4-5%. In the present invention, the temperature rise compression treatment Therefore, the moisture absorption recovery rate of the consolidated material can be significantly reduced.

Further, the temperature lowering treatment in step d specifically includes the following steps.

d1. The cured wood board was cooled to a surface temperature of 130 ° C.-140 ° C. by a water cooling technique, and the water flow rate was set to 3-5 m / s.

d2. The hardened wood board water-cooled by air cooling technology is cooled to a surface temperature of 70 ° C-90 ° C, the air cooling temperature is 50 ° C-60 ° C, and the angle between the air cooling direction and the side wall of the metal plate is 60 ° -90 °. did.

In the present invention, the coefficient of water absorption and expansion of the consolidated material can be remarkably reduced by specifically limiting the temperature lowering treatment step.

Furthermore, PVB intermediate film has a thickness of 0.7-0.9Mm, viscosity 18.5-19.5Pa · s, elastic modulus 70-90 × ¹⁰ 6 Pa, the contact surface of the PVB intermediate film and the wood board The area ratio of is 1: 2-2: 1.

According to the present invention, the water absorption expansion coefficient of the consolidated material can be further reduced by specifically limiting each parameter of the PVB membrane.

The metal consolidation material provided in the present invention includes at least a wood board layer and a metal layer heat-sealed at a high frequency, and the adhesion strength between the consolidation wood board layer and the metal layer is larger than 0.64 MPa.

The metal compaction material based on the high-frequency non-adhesive consolidation technology produced by the production method provided in the present invention is characterized by high adhesive strength, low moisture absorption expansion rate, and low water absorption expansion rate.

Photograph of metal consolidation material in which metal is consolidated independently by high-frequency non-adhesive consolidation technology

The present embodiment provides a method for producing a metal compacted material, and the method for producing the metal compacted material includes the following steps.

a. Laminating treatment: A wooden board and a metal plate are directly laminated and left in the pressure direction, and an interlayer film of PVB is laid between the adjacent metal plate and the wooden board to prepare a laminated material.

b. Heat-pressurization treatment: The laminated material is heated to 100 ° C. at a high frequency, kept warm for 8 minutes, pressure-treated at a compression rate of 30%, kept warm and pressurized for 15 minutes, and a combined material is produced by heating.

c. Hardening treatment: The wood board that has been heat-pressurized is heated at a high frequency to a wood board temperature of 180 ° C. and kept warm for 5 minutes to prepare a hardened wood board.

d. Temperature lowering treatment: The surface of the hardened wood board is cooled to 70 ° C.

e. Curing treatment: The temperature-decreased wooden board is left for 15 days to obtain a metal compaction material.

Here, the temperature lowering treatment in step d specifically includes the following steps.

d1. The cured wood board was cooled to a surface temperature of 130 ° C. by a water cooling technique, and the water flow rate was set to 3 m / s.

d2. The hardened wood board water-cooled by the air cooling technique was cooled to a surface temperature of 70 ° C., the air cooling temperature was set to 50 ° C., and the angle between the wind cooling direction and the side wall of the metal plate was set to 60 °.

In this embodiment, two wooden boards and one metal board are adopted, and the length and width of the wooden board, the PVB film and the metal board are the same, both of which are 0.6 m and 0.4 m, and the wooden board is Canadian maple. The thickness is 10 cm and the water content is 12%, and the metal plate is an aluminum plate and has a thickness of 5 cm.

PVB intermediate film has a thickness of 0.7 mm, a viscosity 18.5Pa · s, modulus 70 × ¹⁰ 6 Pa, the area ratio of the contact surface of the PVB intermediate film and the wood board is 1: 1.

The PVB film of the present invention was purchased from Shanghai Meibang Plastic Co., Ltd.

The present embodiment provides a method for producing a metal compacted material, and the method for producing the metal compacted material includes the following steps.

a. Laminating treatment: A wooden board and a metal plate are directly laminated and left in the pressure direction, and an interlayer film of PVB is laid between the adjacent metal plate and the wooden board to prepare a laminated material.

b. Heat-pressurization treatment: The laminated material is heated to 135 ° C. at a high frequency, kept warm for 15 minutes, pressure-treated at a compression rate of 35%, kept warm and pressurized for 18 minutes, and a combined material is produced by heating.

c. Hardening treatment: The wood board that has been heat-pressurized is heated at a high frequency to a wood board temperature of 200 ° C. and kept warm for 8 minutes to prepare a hardened wood board.

d. Temperature lowering treatment: The surface of the hardened wood board is cooled to 120 ° C.

e. Curing treatment: The temperature-decreased wooden board is left for 15 days to obtain a metal compaction material.

Here, the temperature lowering treatment in step d specifically includes the following steps.

d1. The cured wood board was cooled to a surface temperature of 135 ° C. by a water cooling technique, and the water flow rate was set to 4 m / s.

d2. The hardened wood board water-cooled by the air cooling technique was cooled to a surface temperature of 80 ° C., the air cooling temperature was 55 ° C., and the angle between the air cooling direction and the side wall of the metal plate was 75 ° C.

In this embodiment, two wooden boards and one metal board are adopted, and the length and width of the wooden board, the PVB film and the metal board are the same, both of which are 0.6 m and 0.4 m, and the wooden board is Canadian maple. The thickness is 10 cm and the water content is 12%, and the metal plate is an aluminum plate and has a thickness of 5 cm.

PVB intermediate film has a thickness of 0.8 mm, a viscosity 19.0Pa · s, modulus 80 × ¹⁰ 6 Pa, the area ratio of the contact surface of the wooden plate and PVB intermediate film is 1: 1.

The present embodiment provides a method for producing a metal compacted material, and the method for producing the metal compacted material includes the following steps.

a. Laminating treatment: A wooden board and a metal plate are directly laminated and left in the pressure direction, and an interlayer film of PVB is laid between the adjacent metal plate and the wooden board to prepare a laminated material.

b. Heat-pressurization treatment: The laminated material is heated to 140 ° C. at a high frequency, kept warm for 30 minutes, pressurized at a compressibility of 40%, kept warm and pressurized for 20 minutes, and a combined material is produced by heating.

c. Hardening treatment: The wood board that has been heat-pressurized is heated to a wood board temperature of 220 ° C. at a high frequency and kept warm for 8 minutes to prepare a hardened wood board.

d. Temperature lowering treatment: The surface of the hardened wood board is cooled to 90 ° C.

e. Curing treatment: The temperature-decreased wooden board is left for 15 days to obtain a metal compaction material.

Here, the temperature lowering treatment in step d specifically includes the following steps.

d1. The cured wood board was cooled to a surface temperature of 140 ° C. by a water cooling technique, and the water flow rate was set to 5 m / s.

d2. The hardened wood board water-cooled by the air cooling technique was cooled to a surface temperature of 90 ° C., the air cooling temperature was set to 60 ° C., and the angle between the wind cooling direction and the side wall of the metal plate was set to 90 °.

In this embodiment, two wooden boards and one metal board are adopted, and the length and width of the wooden board, the PVB film and the metal board are the same, both of which are 0.6 m and 0.4 m, and the wooden board is Canadian maple. The thickness is 10 cm and the water content is 12%, and the metal plate is an aluminum plate and has a thickness of 5 cm.

PVB intermediate film has a thickness of 0.9 mm, a viscosity 19.5Pa · s, modulus 90 × ¹⁰ 6 Pa, the area ratio of the contact surface of the wooden plate and PVB intermediate film is 1: 1.

The present embodiment provides a method for producing a metal compacted material, and the method for producing a metal compacted material includes all the steps of Example 1, and the differences are as follows.

In the laminating process of step a, a wooden board / metal board / wooden board is used, and the length and width of the wooden board are 0.5 m and 0.3 m, respectively, the length and width of the metal board are 0.4 m and 0.2 m, respectively, and PVB. The length and width of the film were 0.4 m and 0.2 m, respectively. An aluminum plate is used as the metal plate of the embodiment.

The present embodiment provides a method for producing a metal compacted material, and the method for producing a metal compacted material includes all the steps of Example 1, and the differences are as follows.

In the laminating process of step a, wooden boards / metal boards / wooden boards are laminated in this order, a wooden frame is provided between two adjacent wooden boards, the metal boards are placed in the wooden frame, and the length and width of the wooden boards are different from each other. The length and width of the metal plate are 0.4 m and 0.2 m, respectively, the length and width of the PVB film are 0.4 m and 0.2 m, respectively, and the intermediate film of the PVB is entirely a wooden frame. Placed inside, the height of the wooden frame is 6 cm, the thickness of the metal plate is 5 cm, and the metal plate of the embodiment uses a magnesium alloy.

The present embodiment provides a method for producing a metal compacted material, and the method for producing a metal compacted material includes all the steps of Example 1, and the differences are as follows.

Between the heat-pressurization treatment and the hardening treatment, a temperature-temperature compression treatment is further included in which the heat-pressurized wood is heated at a high frequency to a wood temperature of 130 ° C. to keep the water content at 4% or less.

The present embodiment provides a method for producing a metal compacted material, and the method for producing a metal compacted material includes all the steps of Example 1, and the differences are as follows.

The heat-pressurized wood is heated to 135 ° C. at a high frequency to have a moisture content of 4.5%.

The present embodiment provides a method for producing a metal compacted material, and the method for producing a metal compacted material includes all the steps of Example 1, and the differences are as follows.

The heat-pressurized wood is heated to 140 ° C. at a high frequency to have a moisture content of 5%.

The present embodiment provides a method for producing a metal compacted material, and the method for producing the metal compacted material includes the following steps.

A. Laminating treatment: A wooden board and a metal plate are directly laminated and left in the pressure direction, and an interlayer film of PVB is laid between the adjacent metal plate and the wooden board to prepare a laminated material.

B. Heat-sealing treatment: The laminated material is heated to 135 ° C. at a high frequency, kept warm for 2.5 minutes, pressure-treated at a compression rate of 3.5%, and kept warm and pressed for 6 minutes to prepare a heat-sealing material.

C. Temperature lowering treatment: The surface of the heat-sealed wooden board is cooled to 80 ° C.

In this embodiment, one compacted wood and one metal plate are used, the PVB film has the same area as the metal plate and the compacted plate, and the consolidated wood is a consolidated radiata pine at a high frequency and has a compression ratio. 30%, the thickness of the consolidated wood is 12 cm, the moisture content is 8%, the metal plate is an aluminum plate, the thickness is 5.2 cm, and the length and width of both the consolidated wood and the aluminum plate are 0.28 m. And 0.22 m.

PVB intermediate film has a thickness of 0.9 mm, a viscosity 19.5Pa · s, modulus 90 × ¹⁰ 6 Pa, the area ratio of the contact surface of the PVB intermediate film and the compaction tree is 1: 1.

The present embodiment provides a method for producing a metal compacted material, and the method for producing a metal compacted material includes all the steps of Example 9, and the differences are as follows.

In the laminating treatment of step a, a metal plate / wood board / metal plate is used, and the metal plate is preheated to a metal plate surface temperature of 140 ° C. before the laminating treatment.

Comparative Example 1

The present embodiment provides a method for producing a metal compacted material, and the method for producing the metal compacted material includes the following steps.

a. Laminating treatment: A wooden board and a metal plate are directly laminated and left in the pressure direction, and an interlayer film of PVB is laid between the adjacent metal plate and the wooden board to prepare a laminated material.

b. Heat-pressurization treatment: The laminated material is heated to 80 ° C. at a high frequency, kept warm for 30 minutes, pressure-treated at a compression rate of 20%, kept warm and pressurized for 30 minutes, and a combined material is produced by heating.

c. Hardening treatment: The wood board that has been heat-pressurized is heated at a high frequency to a wood board temperature of 160 ° C. and kept warm for 5 minutes to prepare a hardened wood board.

d. Temperature lowering treatment: The surface of the hardened wood board is cooled to 80 ° C.

e. Curing treatment: The temperature-decreased wooden board is left for 15 days to obtain a metal compaction material.

Here, the temperature lowering treatment in step d specifically includes the following steps.

1. 1. The cured wood board was cooled to a surface temperature of 135 ° C. by a water cooling technique, and the water flow rate was set to 4 m / s.

d2. The hardened wood board water-cooled by the air cooling technique was cooled to a surface temperature of 80 ° C., the air cooling temperature was 55 ° C., and the angle between the air cooling direction and the side wall of the metal plate was 75 ° C.

The PVB film had the same area as the metal plate and the wood board, the wood board was made of linden wood and had a thickness of 10 cm and a water content of 12%, and the metal plate was made of a steel plate and had a thickness of 5 cm.

PVB intermediate film has a thickness of 0.8 mm, a viscosity 19.0Pa · s, modulus 80 × ¹⁰ 6 Pa, the area ratio of the contact surface of the wooden plate and PVB intermediate film is 1: 1.

Comparative Example 2

The present embodiment provides a method for producing a metal compacted material, and the method for producing the metal compacted material includes the following steps.

a. Laminating treatment: A wooden board and a metal plate are directly laminated and left in the pressure direction, and an interlayer film of PVB is laid between the adjacent metal plate and the wooden board to prepare a laminated material.

b. Heat-pressurization treatment: The laminated material is heated to 130 ° C. at a high frequency, kept warm for 15 minutes, pressure-treated at a compression rate of 35%, kept warm and pressurized for 18 minutes, and a combined material is produced by heating.

c. Hardening treatment: The wood board that has been heat-pressurized is heated at a high frequency to a wood board temperature of 200 ° C. and kept warm for 8 minutes to prepare a hardened wood board.

d. Temperature lowering treatment: The surface of the hardened wood board is cooled to 80 ° C.

e. Curing treatment: The temperature-decreased wooden board is left for 15 days to obtain a metal compaction material.

Here, in the temperature lowering treatment of step d, specifically, the hardened wood board is cooled to a surface temperature of 80 ° C. by an air cooling technique, the air cooling temperature is set to 55 ° C., and the temperature between the air cooling direction and the side wall of the metal plate is set. Includes steps with an angle of 40 °.

The PVB film had the same area as the metal plate and the wood board, the wood board was made of linden wood and had a thickness of 10 cm and a water content of 12%, and the metal plate was made of a steel plate and had a thickness of 5 cm.

PVB intermediate film has a thickness of 0.8 mm, a viscosity 19.0Pa · s, modulus 80 × ¹⁰ 6 Pa, the area ratio of the contact surface of the PVB intermediate film and the wood board is 1: 1.

Comparative Example 3

The present embodiment provides a method for producing a metal compacted material, and the method for producing the metal compacted material includes the following steps.

f. Laminating treatment: A wooden board and a metal plate are directly laminated and left in the pressure direction, and an interlayer film of PVB is laid between the adjacent metal plate and the wooden board to prepare a laminated material.

g. Heat-pressurization treatment: The laminated material is heated to 120 ° C. at a high frequency, kept warm for 15 minutes, pressure-treated at a compression rate of 35%, kept warm and pressurized for 18 minutes, and a combined material is produced by heating.

h. Hardening treatment: The wood board that has been heat-pressurized is heated at a high frequency to a wood board temperature of 200 ° C. and kept warm for 8 minutes to prepare a hardened wood board.

i. Temperature lowering treatment: The surface of the hardened wood board is cooled to 80 ° C.

j. Curing treatment: The temperature-decreased wooden board is left for 15 days to obtain a metal compaction material.

Here, the temperature lowering treatment of step d specifically includes a step of lowering the cured wood board to a surface temperature of 90 ° C. by a water cooling technique and setting the water flow velocity to 4 m / s.

The PVB film had the same area as the metal plate and the wood board, the wood board was made of linden wood and had a thickness of 10 cm and a water content of 12%, and the metal plate was made of a steel plate and had a thickness of 5 cm.

PVB intermediate film has a thickness of 0.8 mm, a viscosity 19.0Pa · s, modulus 80 × ¹⁰ 6 Pa, the area ratio of the contact surface of the wooden plate and PVB intermediate film is 1: 1.

Comparative Example 4

The present embodiment provides a method for producing a metal compacted material, and the method for producing the metal compacted material includes the following steps.

a. Lamination treatment: A wooden board and a metal plate are directly laminated and left in the pressure direction, and an interlayer film of PVB is laid between the adjacent metal plate and the wooden board to prepare a laminated material.

b. Heat-pressurization treatment: The laminated material is heated to 120 ° C. at a high frequency, kept warm for 15 minutes, pressure-treated at a compression rate of 35%, kept warm and pressurized for 18 minutes, and a combined material is produced by heating.

c. Hardening treatment: The wood board that has been heat-pressurized is heated at a high frequency to a wood board temperature of 200 ° C. and kept warm for 8 minutes to prepare a hardened wood board.

d. Temperature lowering treatment: The surface of the hardened wood board is cooled to 70 ° C.

e. Curing treatment: The temperature-decreased wooden board is left for 15 days to obtain a metal compaction material.

Here, the temperature lowering treatment in step d specifically includes the following steps.

d1. The cured wood board was cooled to a surface temperature of 135 ° C. by a water cooling technique, and the water flow rate was set to 4 m / s.

d2. The hardened wood board water-cooled by the air cooling technique was cooled to a surface temperature of 80 ° C., the air cooling temperature was 55 ° C., and the angle between the air cooling direction and the side wall of the metal plate was 75 ° C.

The PVB film had the same area as the metal plate and the wood board, the wood board was made of linden wood and had a thickness of 10 cm and a water content of 12%, and the metal plate was made of a steel plate and had a thickness of 5 cm.

PVB intermediate film has a thickness of 0.5 mm, a viscosity 10.0 Pa · s, modulus 80 × ¹⁰ 6 Pa, the area ratio of the contact surface of the wooden plate and PVB intermediate film is 1: 1.

Comparative Example 5

The present embodiment provides a method for producing a metal compacted material, and the method for producing a metal compacted material includes all the steps of Example 1, and the differences are as follows.

Between the heat-pressurization treatment and the hardening treatment, a temperature-temperature compression treatment is further included in which the heat-pressurized wood is heated at a high frequency to a wood temperature of 160 ° C. to keep the water content at 10% or less.

Comparative Example 6

The present embodiment provides a method for producing a metal compacted material, and the method for producing a metal compacted material includes all the steps of Example 1, and the differences are as follows.

Between the heat-pressurization treatment and the hardening treatment, a temperature-heating compression treatment is further included in which the heat-pressurized wood is heated at a high frequency to a wood temperature of 162 ° C. to keep the water content at 2% or less.

Test Example 1

Adhesive strength test Using an adhesive strength measuring instrument (purchased from Shanghai Tilt Instrument Meter Table Technology Co., Ltd.), the adhesive strength of 1-4 sets of consolidation materials or composite boards compared with the test 1-4 sets was measured, of which , Test 1-4 sets adopted the consolidated materials of Examples 1-3 and 10, Comparative 1 set adopted the consolidated materials manufactured in Comparative Example 1, and Comparative 2-4 sets were Chinese patents CN1817585A, CN10181314B and CN108608520A. Adopt the composite board manufactured by. Five parallel samples were prepared for each of the various consolidation materials, the results were evaluated as average values, and the results considered were shown in Table 1.

As can be seen from Table 1, the consolidated material produced by the method of the present invention has high adhesive strength, is more effective than the four comparative examples, and is pretreated with a high frequency metal plate and then heated and compressed with a wooden board. By performing the above, the adhesive strength can be further increased.

Test Example 2

Water absorption expansion rate test The consolidated materials produced in Example 1-3 and Comparative Example 2-4 are placed in a constant temperature and humidity group box, and the mass is constant (each consolidated material is weighed, and after 24 hours, it is weighed a second time and secondary. If the mass difference weighed is less than 1% of the mass of the consolidated material, the mass is considered to be constant), then the thickness of the center of each consolidated material is measured, and each consolidated material has a pH of 7 ± 1 and a temperature. Immerse in a water tank at 20 ± 2 ° C., the consolidation material is perpendicular to the horizontal plane, the upper surface of the consolidation material is kept lower than the water surface, the distance between the lower surface of the consolidation material and the bottom of the water tank is 10 cm, and each consolidation material is in contact with each other. Immerse for 24 hours without immersing, take out each consolidated material, remove surface water immersion, measure the thickness of the center of each consolidated material within 30 minutes, calculate the water absorption expansion rate T (%), and T is wood It is the ratio of the difference in thickness before and after expansion and the difference in thickness before and after consolidation, and the results are shown in Table 2.

As can be seen from Table 2, the coefficient of thermal expansion of Examples 1-3 is smaller than that of Comparative Example 2-4, and the temperature lowering treatment method and the PVB interlayer film provided in the present invention have a water absorption expansion coefficient of the compacted material. Has been proven to be significantly reduced.

Test Example 3

Moisture absorption expansion rate and temperature expansion rate test The consolidated materials of Examples 2, 6-8 and Comparative Example 5-6 were left to stand for 150 days under a condition of 90% relative humidity to measure the moisture absorption expansion rate, and then Example 2 , 6-8 and Comparative Example 5-6 are allowed to stand for 30 days under the condition of a relative temperature of 60 ° C., and the high temperature expansion coefficient is measured.

The coefficient of thermal expansion is the ratio of the difference in thickness before and after expansion of the consolidated material to the thickness before expansion, that is, the coefficient of thermal expansion, and the coefficient of high temperature expansion is the difference in thickness before and after expansion of the consolidated material and the thickness before expansion. The measurement results are shown in Table 3.

As can be seen from Table 3, the method provided in the present invention can significantly reduce the coefficient of thermal expansion and the coefficient of thermal expansion of the consolidated material by increasing the number of heating and compressing steps. By changing the parameters, the coefficient of moisture absorption and expansion of the consolidated material and the coefficient of high temperature expansion can be improved.

Test Example 4

Burning test As the compaction material produced by the production method of Example 2-5, a metal compaction material is produced by substituting a general thermal pressure plate for high frequency as Control Example 7, and other parameters are Example 2 of the present invention. After successful rolling, the percentage of the scorched area of the upper and lower wooden boards was observed, and the experimental results are shown in Table 4.

As can be seen from Table 4, by providing a wooden frame between two adjacent wooden boards, or by limiting the length, width, and thickness of the wooden board and the metal board by the method provided in the present invention. The problem of charring during compaction can be effectively avoided, and replacing high frequency technology with a general thermal pressure plate causes the problem of charring over a large area.

The embodiments described above merely describe preferred embodiments of the present invention, do not limit the scope of the present invention, and those skilled in the art can use the techniques of the present invention without departing from the spirit of the present invention. Any modifications or improvements made to the solution are included in the scope of protection set forth in the claims of the present invention.

Claims (8)

a. Laminating treatment: A wooden board and a metal plate are directly laminated in the pressure direction and left to be laminated, and the adjacent metal plate and the metal plate are laminated.
A step of laying a PVB interlayer between wooden boards to prepare a laminated material,
b. Heat-pressurization treatment: The laminated material is heated at a high frequency of 130 ° C.-140 ° C. for 8 min-3.
Insulate for 0 min, pressurize at a compression rate of 30% -40%, and incubate for 15-20 min.
Steps to make the heated and pressurized material,
c. Hardening treatment: The wood board that has been heat-pressurized is heated at a high frequency to a wood board temperature of 180-220 ° C.
The step of keeping warm for 5-8 minutes to make a hardened wood board,
d. Temperature lowering treatment: A step of cooling the hardened wood board surface to 70-90 ° C.
e. Curing treatment: Leave the heat-reduced wood board for 15 to 20 days to obtain a metal compaction material.
Including
A method for producing a metal compaction material based on a high-frequency non-adhesive consolidation technology. In the laminating process of step a, the laminating material is produced in the order of wood board / metal board / wood board.
The size of the two adjacent wooden boards is larger than the size of the metal board, and the sum of the thicknesses of the two adjacent wooden boards compressed and reduced is not smaller than the thickness of the metal board.
The manufacturing method according to claim 1 . The laminated material is prepared in the order of the wooden board / metal board / wooden board in step a, a wooden frame is provided between two adjacent wooden boards, the metal plate is placed in the wooden frame, and the PVB interlayer film is partially or All are placed in a wooden frame, and the height of the wooden frame is larger than the thickness of the metal plate.
The manufacturing method according to claim 1 . In the laminating process of step a, the laminating material is produced in the order of metal plate / wood plate / metal plate.
Before the laminating treatment, the metal plate is preheated to a surface temperature of 120 ° C.-160 ° C. of the metal plate.
The manufacturing method according to claim 1 . The heat retention time in step b is 25-30 min.
The manufacturing method according to claim 1 . The heated and pressurized wood is heated at a high frequency of 130 ° C. to 140 ° C. to have a moisture content of 4-5%.
The manufacturing method according to claim 1 . Specifically, the temperature lowering treatment in step d
d1. The cured wood board is cooled to a surface temperature of 130 ° C-140 ° C using water cooling technology, and the water flow velocity is 3-5 m.
Steps with / s and
d2. A step of lowering the surface temperature of a hardened wooden board water-cooled by air cooling technology to a surface temperature of 70 ° C-90 ° C, setting the air cooling temperature to 50 ° C-60 ° C, and setting the angle between the air cooling direction and the side wall of the metal plate to 60 ° -90 ° C. including
The manufacturing method according to claim 1 . The PVB interlayer film has a thickness of 0.7-0.9 mm, a viscosity of 18.5-19.5 Pa · s, and an elastic modulus of 70-90 × 10 ⁶ Pa, and is a contact surface between the wooden board and the PVB interlayer film. Area ratio is 1
: 2-2: 1
The manufacturing method according to claim 1 .

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