AU2020103280A4 - Device and method for increasing hot pressing speed of particleboard - Google Patents
Device and method for increasing hot pressing speed of particleboard Download PDFInfo
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- AU2020103280A4 AU2020103280A4 AU2020103280A AU2020103280A AU2020103280A4 AU 2020103280 A4 AU2020103280 A4 AU 2020103280A4 AU 2020103280 A AU2020103280 A AU 2020103280A AU 2020103280 A AU2020103280 A AU 2020103280A AU 2020103280 A4 AU2020103280 A4 AU 2020103280A4
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- Australia
- Prior art keywords
- hot air
- pipeline
- particleboard
- core layer
- hot
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The disclosure discloses a device and a method for increasing the hot pressing speed of
particleboard. In this method, after the wood-based panel sizing is completed and before the slab
paving, the hot air treatment device is provided between the core layer particle bin and the paving
roller. The internal hot air temperature is 60-80 °C, and the time for the wood particles to pass
through the hot air pipeline from top to bottom is about 3-5 seconds. After heat treatment, the
particle temperature is increased by 20-30 °C to 50-70 °C on the original basis. The disclosure can
obviously reduce the temperature difference between the surface and core layer particleboard,
realize the rapid transfer of temperature inside the slab, achieve the rapid curing of resin adhesive,
so as to improve the hot pressing speed of the particleboard, while the moisture content of the
particleboard is controlled at 5-7%. For the surface particles, no treatment is made, and through the
heat treatment process of the core layer particles, the hot pressing speed of the existing
particleboard is promoted greatly, from 13 s/mm to 10 s/mm.
Fig. 1
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Fig. 2
Description
Fig. 1
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11 Fig. 2
The present disclosure relates to a device and a method for increasing the hot pressing speed of
particleboard, relating to the technical field of wood-based panel production.
In the process of particleboard preparation, the selection of adhesive and hot pressing of plates
is very important. In addition to determining the quality of the board, it also affects the production
efficiency, environmental protection performance and energy consumption of the board preparation
to a certain extent. The curing of adhesives for particleboard production needs hot pressing, which
determines the curing rate and quality of adhesives. Generally speaking, the curing of adhesive
needs to be completed at a certain temperature, pressure and time. In a certain time range, the
temperature is transferred from the hot pressing pad to the surface layer and core layer of the slab.
When the temperature of surface and core layers of the slab reach the curing temperature of the
adhesive, the adhesive begins to curing, and the adhesive is closely combined with the wood
particles under a certain pressure, so as to prepare a particleboard with a certain strength. In the
process of particleboard production, due to the difference of temperature gradient and the loss of
temperature in the transfer process, the time when the adhesive on the wood particles of the core
layer of the slab reaches the curing temperature is much later than that on the surface layer of the
slab. Therefore, the hot pressing time of particleboard can be shortened obviously by accelerating
the heating rate of the adhesives in the core layer of the slab and reducing the temperature
difference between surface and core layer of the particleboard, so as to realize high speed and low
energy consumption production.
The existing patent technology have shows that through the construction of moisture content
gradient, the moisture content of slab surface layer can be increased, so that steam impact effect will
be produced, so as to accelerate the temperature transfer speed from slab surface layer to core layer,
and increase the heating rate of slab core layer, such that the hot pressing time will be shortened and
the production efficiency will be improved finally. In addition, through the introduction of steam
injection technology in the late stage of slab assembly, small holes are provided on the continuous slab strip, and the hot and humid steam passes through the whole slab at a uniform speed from top to bottom, so as to effectively treat the surface and core layer of the slab, so that the temperature of the surface and core layer of the slab is significantly improved, so as to accelerate the resin curing and realize the rapid production of particleboard. However, through careful analysis, it is concluded that the main reason for the slow hot pressing speed of the slab is the temperature difference between the surface and core layers. In the existing particleboard production process, the surface temperature of the slab has reached the temperature requirements before hot pressing. The main problem is that the temperature of the core layer of the slab can not keep up with the surface temperature. Therefore, as long as the temperature difference between the core layer and the surface layer of the slab is effectively solved, the hot pressing time of the particleboard can be greatly shortened. According to the above facts, the objective of both the slab moisture gradient construction technology and steam preheating technology is to realize the rapid temperature transfer and reduce the temperature difference between the surface layer and the core layer. It would be more meaningful to shorten the temperature difference between the surface layer and the core layer by increasing the temperature of the core layer directly.
According to literature search, there is no research on the technology of heat-treating on the
core layer of particles to increase the temperature of the core layer of slab to realize the rapid
production of particleboard.
SUMMARY In view of the above problems, the present disclosure develops a hot air heating technology to
improve the heating rate of the core layer of the particleboard slab by reducing the temperature
difference between the surface layer and the core layer of the particleboard, accelerating the curing
rate of the adhesive and the production efficiency of the particleboard. The present disclosure can
apparently increase the temperature of the core layer particles, so as to increase the curing speed of
the thermosetting resin adhesive for the wood-based panel and shorten the heat pressing cycle,
which can significantly improve the production efficiency, reduce the energy consumption of
wood-based panel production, realize the energy-saving and environmental protection production of
wood-based panel, and promote the sustainable and healthy development of wood-based panel
industry.
The technical solution adopted by the present disclosure to solve the technical problem is as
follows: A device for increasing hot pressing speed of particleboard, including a core layer particle
bin, a bottom of the core layer particle bin is communicated with a hot air treatment device, a
paving roller is provided under the hot air treatment device, a conveyor belt is provided under the
paving roller, a slab is provided on the conveyor belt, the hot air treatment device is provided with a
hot air pipeline, and a hot air recovery pipeline with a hot air inlet hole is provided inside a top of
the hot air treatment device; under an action of negative pressure, the hot air recovery pipeline
recovers hot air through the hot air inlet hole; in the hot air recovery pipeline, the hole spacing
between the hot air inlet hole is 8-10 mm and a hole diameter of the hot air inlet hole is 3-5 mm; the
hot air recovery pipeline is communicated with a bottom end of the hot air treatment device and a
hot air source, and the air recovery pipeline is provided with a one-way flow control valve and a
temperature control sensor; an angle between an outlet direction of the hot air inlet hole and a center
line of the hot air pipeline is 40 degrees; a bolt is used to fix the hot air treatment device and the
core layer particle bin, and a rubber seal ring is used to seal a joint between the hot air treatment
device and the core layer particle bin.
Loading wood particles into a core layer particle bin after the wood-based panel sizing is
completed, and the wood particles falls in a hot air pipeline after being measured through the core
layer particle bin, and a falling speed of the wood particles is 10.1-10.5 m/s; providing of hot air
flowing upward along the hot air pipeline from the hot air inlet hole at an angle of 40 degrees, and
the hot air flows from bottom to top to heat the falling wood particles; after passing through the hot
air pipeline, a temperature of the wood particles increases by 20-30 °C, reaching 50-70 °C, and a
moisture content of core layer particles is controlled at 5-7%.
The hot air reaching the top of the hot air pipeline is collected by the hot air recovery device
and then supplied to the bottom end of the hot air pipeline for recycling, so as to realize the rapid
curing of resin and accelerate the production of particleboard.
The hot air temperature is 60-80 °C, and the rising speed from bottom to top is Om/s.
The residence time of the falling wood particles in the hot air pipeline is 3-5 seconds.
No treatment is made to the surface particles.
The method is used for the optimization of particleboard production line. After completing of
the wood-based panel sizing and before the slab paving, the temperature of the core layer particles
is increased by 20-30 °C and reached to 50-70 °C after heat treatment. The temperature difference
between the surface and core layer particles of the slab is obviously reduced, and the rapid
temperature transfer in the slab is realized, and the rapid curing of resin adhesive is achieved, so
that the hot pressing speed of particleboard can be increased, and the moisture content of core layer
particles is controlled in the range of 5-7%. For surface particles, no treatment is made. The hot
pressing speed of the existing particleboard is increased from 13 s/mm to 10 s/mm by the heat
treatment process of core layer particleboard.
The angle between the outlet direction of the hot air inlet hole and the center line of the hot air
pipeline is 40 degrees, which makes the hot air flow upward at an angle of 40 degrees. The hot air
treatment device and the bin are fixed with bolts. In order to prevent the leakage of hot air at the
joint, the use of rubber sealing ring is necessary. The temperature loss of hot air in the recovery
pipeline is supplemented by the hot air source. The temperature control sensor controls the
temperature of the whole system to make the temperature that enters into the hot air inlet hole reach
the target temperature.
In order to avoid the recycled hot air from entering the hot air source pipeline, a one-way flow
control valve is added here to achieve the purpose of one-way flow. The temperature loss of the
recollected hot air in the recovery pipeline is supplemented by the hot air source to ensure the
consistency of the target temperature entering the hot air inlet hole. The temperature is controlled by
the temperature control sensor.
The hot air treatment method of the core layer particles can obviously improve the core layer
particles temperature, reduce the temperature difference between the surface layer and the core
layer particles, accelerate the temperature transfer between the slabs, and realize the rapid curing of
resin adhesive and the rapid production of particleboard. The hot air flows from the bottom to the
top to heat the falling particles. The hot air reaching the top is collected by the recovery device and
then supplied to the lower end for recycling, so as to realize rapid resin curing, thus accelerating the
production of particleboard and saving energy.
The present disclosure is further described in combination with the drawings and the embodiment. Fig. 1 is the structural diagram of the device for increasing the hot pressing speed of particleboard. Fig. 2 is the structural diagram of the hot air pipeline of the present disclosure. Wherein, 1. core layer particle bin, 2. Hot air treatment device, 3. Paving roller, 4. Conveyor belt, 5. Slab, 6. Hot air pipeline, 7. Hot air inlet hole, 8. Hot air source, 9. Hot air recovery pipeline, 10. one-way flow control valve, 11. Temperature control sensor.
The present disclosure is further described in detail in combination with the accompanying drawings. These drawings are simplified schematic diagrams, and only illustrate the basic structure
of the present disclosure in a schematic way, so only the composition related to the disclosure is
shown in the drawings.
A device for increasing hot pressing speed of particleboard, including a core layer particle bin
1, a bottom of the core layer particle bin 1 is communicated with a hot air treatment device 2, a paving roller 3 is provided under the hot air treatment device 2, a conveyor belt 4 is provided under
the paving roller 3, a slab 5 is provided on the conveyor belt 4, the hot air treatment device 2 is
provided with a hot air pipeline 6, and a hot air recovery pipeline 9 with a hot air inlet hole 7 is
provided inside a top of the hot air treatment device 2. Under an action of negative pressure, the hot
air recovery pipeline 9 recovers hot air through the hot air inlet hole 7. In the hot air recovery
pipeline 9, the hole spacing between the hot air inlet holes 7 is 8-10 mm and a hole diameter of the
hot air inlet hole 7 is 3-5 mm. The hot air recovery pipeline 9 is communicated with a bottom end of the hot air treatment device 2 and a hot air source 8, and the air recovery pipeline 9 is provided with
a one-way flow control valve 10 and a temperature control sensor 11. An angle between an outlet
direction of the hot air inlet hole 7 and a center line of the hot air pipeline 6 is 40 degrees, such that
the hot air flows upward at 40 degrees, as shown in Fig.1 and Fig.2.
The hot air recovery pipeline 9 is provided at the top of the hot air treatment device 2, and the hot air recovery pipeline 9 is communicated with the bottom of the hot air treatment device 2.
A method for increasing the hot pressing speed of particleboard includes that loading wood
particles into the core layer particle bin 1 after the wood-based panel sizing is completed, and the wood particles falls in the hot air pipeline 6 after being measured through the core layer particle bin, and the falling speed of the wood particles is 10.1-10.5 m/s; providing of hot air flowing upward along the hot air pipeline 6 from the hot air inlet hole 7 at an angle of 40 degrees, and the hot air flows from bottom to top to heat the falling wood particles; after passing through the hot air pipeline 6, the temperature of the wood particles increases by 20-30 °C, reaching 50-70 °C, and the moisture content of core layer particles is controlled at 5-7%.
The hot air reaching the top of the hot air pipeline 6 is collected by the hot air recovery
pipeline 9 and then supplied to the bottom end of the hot air pipeline for recycling, so as to realize
the rapid curing of resin and accelerate the production of particleboard. The hot air recovery
pipeline 9 is connected with the hot air source 8, and the space between them is controlled by the
one-way flow control valve 10, to avoid the recollected hot source entering into the hot air source
pipeline. the temperature loss of the recollected hot air in the hot air recovery pipeline 9 is
supplemented by the hot air source 8 to ensure the consistency of the target temperature entering the
hot air inlet hole 7. The temperature is controlled by the temperature control sensor 11.
The hot air temperature is 60-80 °C, and the rising speed from bottom to top is 10m/s.
The residence time of the falling wood particles in the hot air pipeline 6 is 3-5 seconds.
No treatment is made to the surface particles.
Embodiment 1
A device for increasing hot pressing speed of particleboard, including a core layer particle bin
1, the bottom of the core layer particle bin 1 is communicated with a hot air treatment device 2, a
paving roller 3 is provided under the hot air treatment device 2, a conveyor belt 4 is provided under
the paving roller 3, a slab 5 is provided on the conveyor belt 4, the hot air treatment device 2 is
provided with a hot air pipeline 6, and a hot air recovery pipeline 9 with a hot air inlet hole 7 is
provided inside the top of the hot air treatment device 2. Under an action of negative pressure, the
hot air recovery pipeline 9 recovers hot air through the hot air inlet holes 7. In the hot air recovery
pipeline 9, the hole spacing between the hot air inlet holes 7 is 10 mm and the hole diameter of the
hot air inlet hole 7 is 5 mm. The hot air recovery pipeline 9 is communicated with the bottom end of
the hot air treatment device 2 and a hot air source 8, and the air recovery pipeline 9 is provided with
a one-way flow control valve 10 and a temperature control sensor 11. An angle between the outlet direction of each of the hot air inlet holes 7 and the center line of the hot air pipeline 6 is 40 degrees, such that the hot air flows upward at 40 degrees.
The hot air recovery pipeline 9 is provided at the top of the hot air treatment device 2, and the
hot air recovery pipeline 9 is communicated with the bottom of the hot air treatment device 2.
A method for increasing the hot pressing speed of particleboard includes that loading wood
particles into the core layer particle bin 1 after the wood-based panel sizing is completed, and the
wood particles falls in the hot air pipeline 6 after being measured through the core layer particle bin,
and the falling speed of the wood particles is 10.5 m/s; providing of hot air flowing upward along
the hot air pipeline 6 from the hot air inlet hole 7 at an angle of 40 degrees, and the hot air flows
from bottom to top to heat the falling wood particles; after passing through the hot air pipeline 6,
the temperature of the wood particles increases by 20 °C, reaching 60 °C, and the moisture content
of core layer particles is controlled at 5-7%.
The hot air reaching the top of the hot air pipeline 6 is collected by the hot air recovery
pipeline 9 and then supplied to the bottom end of the hot air pipeline for recycling, so as to realize
the rapid curing of resin and accelerate the production of particleboard. The hot air recovery
pipeline 9 is connected with the hot air source 8, and the space between them is controlled by the
one-way flow control valve 10, to avoid the recollected hot source entering into the hot air source
pipeline. the temperature loss of the recollected hot air in the hot air recovery pipeline 9 is
supplemented by the hot air source 8 to ensure the consistency of the target temperature entering the
hot air inlet hole 7. The temperature is controlled by the temperature control sensor 11.
The hot air temperature is 60-80 °C, and the rising speed from bottom to top is 10m/s.
The residence time of the falling wood particles in the hot air pipeline 6 is 4 seconds.
No treatment is made to the surface particles.
Embodiment 2
A device for increasing hot pressing speed of particleboard, including a core layer particle bin
1, the bottom of the core layer particle bin 1 is communicated with a hot air treatment device 2, a
paving roller 3 is provided under the hot air treatment device 2, a conveyor belt 4 is provided under
the paving roller 3, a slab 5 is provided on the conveyor belt 4, the hot air treatment device 2 is
provided with a hot air pipeline 6, and a hot air recovery pipeline 9 with a hot air inlet hole 7 is provided inside the top of the hot air treatment device 2. Under an action of negative pressure, the hot air recovery pipeline 9 recovers hot air through the hot air inlet holes 7. In the hot air recovery pipeline 9, the hole spacing between the hot air inlet holes 7 is 9 mm and the hole diameter of the hot air inlet hole 7 is 4 mm. The hot air recovery pipeline 9 is communicated with the bottom end of the hot air treatment device 2 and a hot air source 8, and the air recovery pipeline 9 is provided with a one-way flow control valve 10 and a temperature control sensor 11. An angle between the outlet direction of each of the hot air inlet holes 7 and the center line of the hot air pipeline 6 is 40 degrees, such that the hot air flows upward at 40 degrees.
The hot air recovery pipeline 9 is provided at the top of the hot air treatment device 2, and the
hot air recovery pipeline 9 is communicated with the bottom of the hot air treatment device 2.
A method for increasing the hot pressing speed of particleboard includes that loading wood
particles into the core layer particle bin 1 after the wood-based panel sizing is completed, and the
wood particles falls in the hot air pipeline 6 after being measured through the core layer particle bin,
and the falling speed of the wood particles is 10.5 m/s; providing of hot air flowing upward along
the hot air pipeline 6 from the hot air inlet hole 7 at an angle of 40 degrees, and the hot air flows from bottom to top to heat the falling wood particles; after passing through the hot air pipeline 6,
the temperature of the wood particles increases by 30 °C, reaching 70 °C, and the moisture content
of core layer particles is controlled at 5-7%.
The hot air reaching the top of the hot air pipeline 6 is collected by the hot air recovery
pipeline 9 and then supplied to the bottom end of the hot air pipeline for recycling, so as to realize
the rapid curing of resin and accelerate the production of particleboard. The hot air recovery
pipeline 9 is connected with the hot air source 8, and the space between them is controlled by the
one-way flow control valve 10, to avoid the recollected hot source entering into the hot air source
pipeline. the temperature loss of the recollected hot air in the hot air recovery pipeline 9 is
supplemented by the hot air source 8 to ensure the consistency of the target temperature entering the
hot air inlet hole 7. The temperature is controlled by the temperature control sensor 11.
The hot air temperature is 80 °C, and the rising speed from bottom to top is 10m/s.
The residence time of the falling wood particles in the hot air pipeline 6 is 4 seconds.
No treatment is made to the surface particles.
Embodiment 3
A device for increasing hot pressing speed of particleboard, including a core layer particle bin
1, the bottom of the core layer particle bin 1 is communicated with a hot air treatment device 2, a
paving roller 3 is provided under the hot air treatment device 2, a conveyor belt 4 is provided under
the paving roller 3, a slab 5 is provided on the conveyor belt 4, the hot air treatment device 2 is
provided with a hot air pipeline 6, and a hot air recovery pipeline 9 with a hot air inlet hole 7 is
provided inside the top of the hot air treatment device 2. Under an action of negative pressure, the
hot air recovery pipeline 9 recovers hot air through the hot air inlet holes 7. In the hot air recovery
pipeline 9, the hole spacing between the hot air inlet holes 7 is 9 mm and the hole diameter of the
hot air inlet hole 7 is 4 mm. The hot air recovery pipeline 9 is communicated with the bottom end of
the hot air treatment device 2 and a hot air source 8, and the air recovery pipeline 9 is provided with
a one-way flow control valve 10 and a temperature control sensor 11. An angle between the outlet
direction of each of the hot air inlet holes 7 and the center line of the hot air pipeline 6 is 40 degrees,
such that the hot air flows upward at 40 degrees.
The hot air recovery pipeline 9 is provided at the top of the hot air treatment device 2, and the
hot air recovery pipeline 9 is communicated with the bottom of the hot air treatment device 2.
A method for increasing the hot pressing speed of particleboard includes that loading wood
particles into the core layer particle bin 1 after the wood-based panel sizing is completed, and the
wood particles falls in the hot air pipeline 6 after being measured through the core layer particle bin,
and the falling speed of the wood particles is 10.5 m/s; providing of hot air flowing upward along
the hot air pipeline 6 from the hot air inlet hole 7 at an angle of 40 degrees, and the hot air flows
from bottom to top to heat the falling wood particles; after passing through the hot air pipeline 6,
the temperature of the wood particles increases by 25 °C, reaching 65 °C, and the moisture content
of core layer particles is controlled at 5-7%.
The hot air reaching the top of the hot air pipeline 6 is collected by the hot air recovery
pipeline 9 and then supplied to the bottom end of the hot air pipeline for recycling, so as to realize
the rapid curing of resin and accelerate the production of particleboard. The hot air recovery
pipeline 9 is connected with the hot air source 8, and the space between them is controlled by the
one-way flow control valve 10, to avoid the recollected hot source entering into the hot air source pipeline. the temperature loss of the recollected hot air in the hot air recovery pipeline 9 is supplemented by the hot air source 8 to ensure the consistency of the target temperature entering the hot air inlet hole 7. The temperature is controlled by the temperature control sensor 11.
The hot air temperature is 70 °C, and the rising speed from bottom to top is 10 m/s.
The residence time of the falling wood particles in the hot air pipeline 6 is 4 seconds.
No treatment is made to the surface particles.
Finally, it should be understood that the above embodiments are only used to illustrate the
technical solutions of the present disclosure, rather than limitations. Although the present disclosure
is described in detail with reference to the embodiments, those skilled in the art should understand
that the technical solution of the present disclosure can be modified or replaced equivalently
without departing from the purpose and scope of the technical solution of the present disclosure,
which shall be within the scope of claims.
Claims (6)
1. A device for increasing hot pressing speed of particleboard, comprising a core layer particle
bin, a bottom of the core layer particle bin is communicated with a hot air treatment device, a
paving roller is provided under the hot air treatment device, a conveyor belt is provided under the
paving roller, a slab is provided on the conveyor belt, the hot air treatment device is provided with a
hot air pipeline, and a hot air recovery pipeline with a hot air inlet hole is provided inside a top of
the hot air treatment device; under an action of negative pressure, the hot air recovery pipeline
recovers hot air through the hot air inlet hole; in the hot air recovery pipeline, a hole spacing
between the hot air inlet hole is 8-10 mm and a hole diameter of the hot air inlet hole is 3-5 mm; the
hot air recovery pipeline is communicated with a bottom end of the hot air treatment device and a
hot air source, and the air recovery pipeline is provided with a one-way flow control valve and a
temperature control sensor; an angle between an outlet direction of the hot air inlet hole and a center
line of the hot air pipeline is 40 degrees; a bolt is used to fix the hot air treatment device and the
core layer particle bin, and a rubber seal ring is used to seal a joint between the hot air treatment
device and the core layer particle bin.
2. A method for increasing the hot pressing speed of particleboard, comprising: loading wood
particles into a core layer particle bin after the wood-based panel sizing is completed, and the wood
particles falls in a hot air pipeline after being measured through the core layer particle bin, and a
falling speed of the wood particles is 10.1-10.5 m/s; providing of hot air flowing upward along the
hot air pipeline from the hot air inlet hole at an angle of 40 degrees, and the hot air flows from
bottom to top to heat the falling wood particles; after passing through the hot air pipeline, a
temperature of the wood particles increases by 20-30 °C, reaching 50-70 °C, and a moisture content
of core layer particles is controlled at 5-7%.
3. The method for increasing the hot pressing speed of particleboard according to claim 2,
wherein the hot air reaching the top of the hot air pipeline is collected by the hot air recovery device
and then supplied to the bottom end of the hot air pipeline for recycling, so as to realize the rapid
curing of resin and accelerate the production of particleboard.
4. The method for increasing the hot pressing speed of particleboard according to claim 2,
wherein the hot air temperature is 60-80 °C, and the rising speed from bottom to top is 10 m/s.
5. The method for increasing the hot pressing speed of particleboard according to claim 2,
wherein the residence time of the falling wood particles in the hot air pipeline is 3-5 seconds.
6. The method for increasing the hot pressing speed of particleboard according to claim 2,
wherein no treatment is made to the surface particles.
Fig. 2 Fig. 1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020103280A AU2020103280A4 (en) | 2020-11-06 | 2020-11-06 | Device and method for increasing hot pressing speed of particleboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020103280A AU2020103280A4 (en) | 2020-11-06 | 2020-11-06 | Device and method for increasing hot pressing speed of particleboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2020103280A4 true AU2020103280A4 (en) | 2021-01-14 |
Family
ID=74103529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2020103280A Ceased AU2020103280A4 (en) | 2020-11-06 | 2020-11-06 | Device and method for increasing hot pressing speed of particleboard |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2020103280A4 (en) |
-
2020
- 2020-11-06 AU AU2020103280A patent/AU2020103280A4/en not_active Ceased
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |