JPS59164879A - Method of drying veneer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for drying thin notebook-shaped veneer veneers turned from logs, which serve as the base of plywood products.

Conventionally, various methods and devices have been announced and put into practical use as means for drying veneer veneers. Many of these drying means are used, for example, in Japanese Patent Publication No. 56, published by the present applicant. -1.8871, the method detects the moisture content of the veneer and adjusts the time for it to pass through the drying device as a control means as the veneer dries. It controls the transfer speed.

In such a drying method, it is possible to obtain a uniform finished moisture content of the veneer, and the condition of the veneer obtained by cutting from naturally occurring raw wood varies widely depending on the actual condition of drying the veneer. This results in a loss of energy.

To explain the appearance of veneer here, the natural raw wood that is the raw material for veneer has unevenness on its outer circumferential surface, and when it is first turned, it is cut into so-called scrap pieces that are less than the specified width (in the length direction of the log). The board is cut, and soon short pieces of veneer of a predetermined width begin to be produced intermittently, and the length gradually increases as the cutting progresses, and when the cross section of the log reaches a nearly perfect circular shape, it is cut into strips of a predetermined width. Long veneers connected to each other are produced continuously. Therefore, there are two types of veneers used in drying equipment: continuous veneers connected in a strip shape and short rib veneers.In the case of continuous veneers, they are normally wound onto a reel, just like unraveling a cloth. The continuous veneer is automatically rewound and introduced into the drying equipment. On the other hand, for short veneers, the length (width You can't get it.

Naturally, it is inevitable that the shorter the length of the short veneer, the more frequently manual insertion will be required, and the lower the filling efficiency will be.

Next, the general configuration of an 11-board drying device will be explained with reference to Figure 1. As seen in the approximately middle section 11S shown with the board removed, the rolls 14 arranged in three stages, upper and lower, grip the veneer from above and below and rotate, thereby moving the veneer linearly from arrow A to B. ,
Transfer the veneer in the C direction. On the other hand, the hot air is energized by the hot air fan 13 and passes through the arrows C1 and P to the heat exchanger 17.
It is heated by passing through the arrows Q and R'
, S, proceed in the opposite direction in the veneer transport direction, rise through arrow T, reach the hot air fan 13, and thereafter repeat the internal circulation in the direction of the arrow. All of these devices, except for the entrance shelf 1 of the veneer insertion section and the exit shelf 22 of the veneer removal section, are covered by a heat insulating plate loaded with a heat insulating material.

Therefore, the veneer is dried while being conveyed from left to right in the figure, and once it has passed the entire length of the drying path, the conveyance speed is controlled so as to achieve the desired finished moisture content. On the other hand, as a heat source, a heat exchanger with a capacity that can dry the veneer to a predetermined finish moisture content without being transferred is installed, and a heat exchanger that is 100% loaded with the veneer and dried to a predetermined finish moisture content is provided, for example in the case of using steam, etc. Steam pressure will continue to be constantly supplied.

To explain the actual situation of drying short veneers using the drying equipment described below, the veneer filling rate is low because the veneers are short, and the hot air dries the short veneers quickly, resulting in a decrease in the temperature of the hot air. This results in needless circulation inside the aircraft at high temperatures. If we analyze the heat consumption of these common drying devices, we will find that 20-30% of the heat supplied to the device is consumed without being directly involved in drying the veneer.

In other words, there is a loss due to heat dissipation from the opening of the first side conveyor for the entrance, the heating plate on the outer wall of the equipment, the foundation floor, etc.This loss is gradually decreasing due to improvements in the heat insulation plate, etc. It is impossible to seal off the entrances, exits, etc. that cause the most losses, and this can be said to be a fatal loss for the equipment, and it is not possible to significantly reduce it.

Against this backdrop of condition Ij1, there are no high expectations for the filling rate of short veneers (-1), and as a result, the above-mentioned vicious cycle repeats. Incidentally, even in the case of a long continuous tlj plate, such a bad phenomenon occurs in the same way when there is an interruption in the insertion of the middle plate due to a plate tll run in the middle.

The present invention eliminates the above-mentioned deficiencies and achieves a significant energy saving effect.An embodiment will be described below based on the drawing numbers. Figure 2 is a front view.The lower part of the drying equipment No. 10, which serves to transport the veneer while drying, and the upper part, which serves as a hot air path for drying, and the upper part, which serves as a hot air passage, are The lower part is located approximately in the middle of the entire length, and the drying section 11 is shown with the heat insulating plate removed. These drying sections (11) are arranged in series to form one unit drying section (<N), and the required number of drying sections are arranged in series in the longitudinal direction.1 is at the starting end of the continuous 1t φ2 drying section. Arranged artificial shelves *The veneers to be dried are placed in 3 tiers (upper and lower) as shown by arrow A.
Each of these is inserted independently. A cooling section 10C is installed at the end of the continuous drying section IOH.
The cooling section sucks up cold outside air and blows it onto the heated veneer to cool it down. 10F is the cooling fan, and the cooling section 10G An exit shelf 22 is arranged in series with the veneer 21, and a conveyor 23 is disposed downwardly so that the dried veneers to be abused are carried out of the machine in the direction of arrow C from the upper and lower three stages. This is a drive device that drives each roll of the drying section, and the conveyor of the input and output shelves, and is configured to be variable speed.15 is provided near the starting end of each drying section. As shown in FIG. 2, this is a ventilation tact which sucks hot air in the direction of arrow T from near the left and right ends of the roll 14 and introduces the hot air into the fan 13. has nozzle section 1
5' is provided, and has approximately the same structure as the ventilation duct shown in Figure 2, but the ventilation direction is opposite to that in Figure 2, from the arrow R in Figure 1 to the arrow S direction. Hot air passes from top to bottom. Reference numeral 12 denotes a drive device configured to be able to change speed and drive the ±11 wind degree fan I3. 16 is a hot air ventilation path arranged above the drying cloud 10H. 17 is a heat exchanger.In the case of FIG. 1, a fin heater or the like is used, and steam is supplied from a steam pipe 17S. The heat exchanger of the drying equipment includes the aforementioned fin heater, etc. Although not shown in the figure, it may include a steam heater made of a steel pipe inserted in parallel with the roll 14 for conveying the veneer, or the nozzle section 15'.
Multiple rows are arranged nearby. .

Reference numeral 18 is an exhaust stack that exhausts humid air inside the aircraft to the outside of the aircraft. T1 is a temperature detection device disposed on the suction side of the heat exchanger for dry hot air passing through the heat exchanger, and T2 is a temperature detection device similarly disposed on the discharge side of the heat exchanger. In addition, as a simple method, the temperature detector T2 on the discharge side may be omitted. These thermometers either emit an electric signal corresponding to the temperature of the hot air, or emit a signal when a set temperature is reached. P is a pressure switch which, for example, when steam is used as the heat source, emits a signal corresponding to the steam pressure or when a predetermined set pressure is reached. 33 is a control valve. Reference numeral 30 denotes a control panel which receives signals from the aforementioned temperature detecting devices T1, T2, pressure switch P, etc., and controls the hot air fan driving device 12. Note that it is common practice to omit the pressure switch and control the drive device 12 by a signal from a temperature detection device. The drying method of the present invention having the above-described configuration is similar to that of the present invention. 1.1 Yoga.

By inserting the veneer C4J in the direction of the arrow A in the 7th shelf 1, the veneer C4J is transported in the direction of the arrow B through the drying sections IOH in three upper and lower stages. On the other hand, the hot air is forced by the fan 13, passes from the arrow O to the arrow P, passes through the heat exchanger 17, becomes high-temperature hot air, then passes through the nozzle section via the arrow R, and moves in the direction of the arrow S. That is, the veneer travels in the opposite direction in the veneer transport direction (arrow B direction) so as to stroke the outer surface of the veneer, reaches near the beginning of the drying section, and stands in the ventilation duct 15 in the direction of arrow T. fan 13
It moves in the direction of arrow O, as shown by arrows P and '
The circulation is repeated in the Q, R,, S, and T directions. When high-temperature hot air rubs the surface of a veneer, it heats the veneer and 91 minutes of moisture is diluted.9 On the other hand, the high temperature (the wind is
The heated veneers become low-temperature hot air, which passes through the fan 13 and the heat exchanger 17 to become high-temperature hot air again to heat the veneers that are successively charged. Next, to explain the case where the medium plate to be charged is a short veneer and the filling rate of the dryer is low, the veneer is sequentially transferred to the mahara, and the hot air continues to circulate inside the machine, but the amount of material to be dried is However, the hot air reaches a high temperature quickly and circulates.

Such internal temperature can be grasped by the fact that the lower the filling rate is, the lower the temperature detected by the temperature detectors T1, T2, the closer the temperatures detected by the detectors TI, T2 are.

The control panel 30 receives the signals from the detection devices TI, T2, etc., and when the temperature difference between them reaches a set range, controls the drive device 12 of the hot air fan I3 to reduce the rotation speed of the fan. be. As the rotation of the fan decreases, the volume and speed of hot air decrease, and the volume of air passing through the heat exchanger 17 also decreases.

Therefore, heat exchange is slowed down and heat consumption is reduced, and at the same time it is possible to reduce the consumption of moving horns by lowering the rotation of the fan.In other words, the temperature of the hot air is adjusted to the appropriate temperature according to the filling condition of the charged veneers. As a result of drying, if the temperature difference between the detected temperatures at the two locations exceeds the set range over time, the fan rotation speed will be returned to normal rotation by a signal from the control panel. be.

Thereafter, fan rotation will be automatically controlled as appropriate from normal rotation to decelerated rotation based on the signal from the temperature detection device. In addition, detection of the veneer filling rate in the machine using a command signal from a temperature detection device and fan rotation control using a control signal from a control panel that receives the signal include a method in which the speed is gradually decelerated from normal rotation and stepless speed change. Is there a way to change gears in certain stages?

Note that the hot air temperature detected by the temperature detection device T2 can be considered to be approximately constant based on the specifications of the drying device, so the temperature detection device T2 is omitted and the air volume of the hot air is determined sequentially as the set temperature is reached by borrowing from T1. It may be configured to reduce.

When the Pressure Sinoji P uses steam as a heat source, the temperature inside the machine increases due to a decrease in the filling rate inside the machine, and the heat exchange in [7] becomes slow, and if the steam pressure increases, it issues a signal and reduces the volume of hot air. This is the same control method as above.

Ml and M2 are humidity detecting devices installed in the machine, and when the humidity falls below the normal setting, a signal is sent to the side block sieve plate 30 to reduce the amount of hot air.

According to the above method, the amount of hot air corresponding to the veneer filling rate,
Also, by controlling the wind speed, abnormally high temperatures inside the machine during the conventional low veneer filling rate, the accompanying dissipation of high-temperature hot air to the outside of the machine, and high heat energy consumption from heat insulation plates and other sources are significantly reduced. This makes it possible to save a lot of energy.

[Brief explanation of the drawing]

FIG. 1 is a side view of a drying device according to the present invention, and FIG. 2 is a front view. 1... Entrance shelf 10... Drying device 10 C... Cooling section 10 F.
......Cooling fan 10H...
Drying section 11...Unit drying section 12...Fan drive device 1
3・・・・・・・・・・Hot air fan 14・・Sauce・@
O...roll 15-ell-...9, static nozzle section TI,
T, 2...Temperature detection device M1, M2...
...Humidity Detection Device Fig. 2 18 Procedure (Voluntary Submission) February 1980 Mr. Natsushi, Commissioner of the Japan Patent Office] Indication of Tenant Work U/(:m 1958 Patent, 'i1 Application 4] 32] Name of the invention No. 2 Veneer drying method 3 Relationship with the sleeve straightener case Patent No. 31 Applicant address 6-12 Oiwake-cho, Hakodate-shi, Hokkaido Scope of claims and details - Column for detailed explanation of the invention, and drawings. (1) The entire specification is reprinted as shown in the attached sheet. (2) Figure 1 of the attached drawings is corrected as shown in the attached sheet. Above details Crane 1, Title of the invention: Veneer drying method 2, Claim 1, In a veneer drying device that dries the veneer using circulating hot air while conveying the veneer, the filling rate of the veneer fed into the drying device is determined by adjusting the filling rate of the veneer fed into the drying device. A veneer drying method characterized by detecting the internal temperature by measuring the temperature, activating an alarm device based on the temperature, and controlling the volume of circulating hot air. 2. The internal temperature of the drying device is measured before the heat exchanger. The veneer drying method according to claim 1, characterized in that the drying method is carried out using a temperature detection device installed in the dryer. A veneer drying method according to claim 1, characterized in that the drying method is carried out using a detection device. 4. A method of drying a veneer according to claim 1, characterized in that the amount of hot air is controlled by changing the rotational speed of a hot air fan. The method for drying a veneer according to any one of Items 1 to 3. (Hereinafter referred to as blank space) 3. Detailed Description of the Invention The present invention relates to a thin sheet turned from raw wood that is used as a material for plywood products. Various methods and devices have been announced and put into practical use as means for drying veneers.Many of these drying means have been developed, for example, by Kaito Motoyama. As in Publication No. 56-113871, as a control means for the progress of drying of the veneer, the moisture content of the veneer is detected and the time for passage through the dryer is adjusted, and the transfer of the material to be dried is adjusted according to the degree of drying. This method controls the drying speed. Although this drying method results in a uniform finish and moisture content of the veneer, the condition of naturally occurring veneer obtained by turning from logs varies. There are many types of veneers, and a lot of energy is lost depending on the actual condition of drying the veneer.To explain the appearance of the veneer, the natural raw wood that is the raw material for the veneer has unevenness on its outer surface. There is, at the beginning of turning,
So-called scrap veneers that are less than a predetermined width (in the length direction of the log) are cut, and then short bulk veneers of a predetermined width begin to be produced intermittently, and the length increases as the log progresses. As the cross-section of the raw wood gradually increases, and eventually reaches a substantially perfect circular cross-section, long veneers connected in a band shape with a predetermined width are continuously produced. There are two types of veneers that are fed into the drying equipment: continuous veneers in the middle of cutting, which are connected in a band shape, and short, loose veneers in the early stages of cutting.Usually, in the case of continuous veneers, the cloth is The continuous veneer is wound onto a reel and is automatically unwound as it is introduced into the drying equipment. On the other hand, short, loose veneers vary in length (width dimension is generally 3 shaku) from 50 mm to about 2 m, and feeding them into the drying equipment must be done manually. be. Naturally, it is an unavoidable phenomenon that the shorter the length of the short veneer, the more frequently it has to be manually inserted, and the lower the filling efficiency becomes. The general configuration of a veneer drying apparatus will be explained with reference to FIG. The illustrated device is capable of feeding and drying veneers in three vertical stages. Rolls 14 arranged in three upper and lower stages
However, by holding the veneer from above and below and rotating it, the veneer is conveyed linearly from arrows A to B and C directions. The hot air is energized by the fan 13, and the hot air is energized by the arrow 0. P, it is heated by passing through the heat exchanger 17, and then passes through the arrows Q, R, and S, flows backward in the veneer 1M feeding direction, rises through the arrow T, and reaches the hot air fan 13. The internal circulation is then repeated in the direction of the arrow. All of these devices, except for the inlet shelf 1 of the veneer feed section and the outlet shelf 22 of the veneer take-out section, are covered by a heat insulating plate loaded with a heat insulating material. The veneer is dried as it is transported from left to right through the drying device shown in the figure, and the transport speed is controlled so that the desired moisture content is reached as the veneer passes through the entire length of the drying path. . On the other hand, as a drying heat source, 100% veneer is used in the drying equipment.
A heat exchanger is provided with a capacity that allows drying to a predetermined finished moisture content while being loaded and transferred, and, in the case of using steam, for example, it continues to constantly supply steam pressure that conforms to the specifications. To explain the actual situation of drying short veneers using the above drying equipment, the veneer filling rate is low due to the short individual unit, and the hot air dries a small amount of short veneers very quickly, resulting in the temperature of the hot air. The temperature drop is small and the temperature is high, which results in needless circulation inside the aircraft. When we analyze the heat consumption of these common drying devices, we find that 20 to 30% of the heat supplied to the device is
It can be seen that it is consumed without being directly involved in drying the veneer. In other words, the loss is due to heat dissipation from the open parts of the input/output side conveyor, the heat insulation plate on the outer wall of the equipment, the foundation floor surface, etc. As mentioned above, heat loss gradually decreases due to improvements in heat insulation plates, for example.
It is impossible to block the inlet, outlet, etc., which cause the most loss, and this can be said to be the fatal flaw of the device, and it is not possible to significantly reduce the amount of fuel. Against this background, the drying of short veneers cannot be expected to improve the filling rate, and the above-mentioned vicious cycle is repeated. Furthermore, even in the case of long continuous veneers, such a bad phenomenon similarly occurs when there are many interruptions in the veneer feeding due to veneer breaks in the middle. The present invention eliminates the above-mentioned deficiencies and achieves a significant energy saving effect.The present invention allows the filling rate of short veneers, etc. In order to minimize the heat loss of the drying equipment, e.g. in the case of a low filling rate, the hot air fan will issue an alarm and slow down the heat exchange of the hot air by the heat exchanger. It is characterized by lowering the rotation of the engine. Embodiments will be described below based on the drawings. FIG. 1 is a side view of the entire drying device, and FIG. 2 is a front view. The drying device 10 is roughly divided into a lower part which serves to dry and transport the veneer, and an upper part which serves as an air passage for drying hot air.
In the lower part, approximately in the middle of the overall length, there are many drying sections 11S shown with the heat insulating plate removed, and three rolls that rotate while holding the veneer from above and below as a conveying device are arranged in three stages, one above the other. A required number of these drying sections 11 constituting a unit drying section 11 are arranged in series in the longitudinal direction to form a drying section 10. 1 is arranged at the starting end of the continuous drying section. At the entrance shelf, the veneers to be dried are distributed and fed into three upper and lower stages in the direction of arrow A. A cooling section 10C is arranged at the firing end of the continuous drying section 1OH. The cooling section sucks in cold outside air and cools it by blowing it onto the dry and heated veneer. IOF is a cooling fan. Next, the cooling section 10C is connected to the outlet 41111.
22 is arranged, and the dried middle plate that takes out the bath from the upper and lower 3 tiers,
A conveyor 23 for taking out the product outside the machine in the direction of arrow C is disposed below. 21 is a drive device that drives each roll of the drying machine I and each conveyor of the input/output shelves, and usually,
It is configured to be variable speed. Reference numeral 15 denotes a ventilation duct installed near the starting end of the continuous drying section, which sucks hot air in the direction of arrow T from near the ends of the left and right shafts of the rolls 14, as shown in FIG. , which introduces hot air to the fan 13. On the other hand, there is a nozzle tact 15 near the end of the drying section.
', and has almost the same structure as the ventilation duct shown in Figure 2, but the ventilation direction is opposite to that of the duct, from the direction of arrow R to the direction of arrow S in Figure 1. , hot air passes from top to bottom. Reference numeral 12 denotes a drive device that drives the hot air fan 13 and is configured to be able to change speed. 16 is a hot air ventilation path arranged above the drying section IOH. [7 is a heat exchanger, in the case of the first circle, a fin heater or the like is used, and steam is supplied from a steam pipe. As for the heat exchanger of the drying device, in addition to the above-mentioned fin heater, etc., although not shown in the figure, there are multiple rows of steam heaters made of steel pipes, etc., which are passed through in parallel with the rolls 14 of the conveying device, and are arranged near the ventilation duct 15. . 18 is the exhaust stack, and the a inside the machine increases as the veneer dries.
The moist air is appropriately removed to the outside of the machine via a regulating device such as a damper. Tl is a temperature detection device, and is one or more temperature detection devices installed in front of the heat exchanger for the dry hot air passing through the heat exchanger, and 1 and 2 are also installed on the back side of the heat exchanger. one or more temperature sensing devices located at the In addition, as a simple method, the temperature detection device T2 on the rear side may be omitted. The thermometer emits an electrical signal corresponding to the hot air temperature, or
Alternatively, it will issue a signal when the set temperature is reached. Reference numeral 30 denotes a control device, which includes a built-in warning device such as a blinking signal light or a buzzer, and is connected to the temperature detection device Tl, '
Upon receiving the signal from r2, it activates the alarm device and further controls the hot air fan drive device manually or automatically as necessary. 33 is a control valve that controls the pressure, flow rate, etc. of a heat source such as steam to be fed into the heat exchanger. The drying method of the present invention having the above configuration will be explained based on embodiments. The veneers to be dried are placed on the entrance shelf 1.
By feeding and entering the drying section 10M in the direction indicated by the arrow A, the drying section 10M is transported in the direction indicated by the arrow B across the three upper and lower stages. The hot air is energized by the fan 13 and moves from arrow 0 to arrow l.
), passes through the heat exchanger 17, becomes high-temperature hot air, then passes through the nostle duct through the arrow R, and in the direction of the arrow S.
That is, the veneer moves backward in the veneer transport direction (arrow B direction) so as to stroke the outer surface of the veneer, and reaches the beginning 141 of the drying section.
Part 1 (1 (1) reaches near ζ, rises in the direction of the arrow 1'' in the ventilation duct 5, is assisted by the fan 13 and advances in the direction of the arrow O, and hereafter the arrows P, Q, R, S, etc. The circulation is repeated in the 1-direction. When the high-temperature hot air rubs the veneer surface, it touches the veneer and the moisture in the veneer scatters. On the other hand, the hot air Therefore, it becomes low-temperature hot air, and by passing through the heat exchanger 17 via the fan 13, it becomes high-temperature hot air again and heats the veneers that are successively fed in. To explain the case of bulk veneer-2, when the filling rate of the drying device is low, the veneers are transferred sparsely and the hot air continues to circulate in the machine, but the quantity of material to be dried is small, and the hot air is The temperature inside the machine reaches a high temperature quickly and circulates.
, 1゛2, etc., but the lower the filling rate, the more
It can be seen that the temperatures detected by the detection devices 1, 1, and 2 tend to approach each other. For example, the signal of the temperature detection device described above may be caused by a low veneer filling rate,
A warning device such as a signal light or a buzzer is activated as appropriate for each of multiple stages such as medium and high to notify abnormalities in the filling rate. After this, the drive device 12 of the hot air fan 13 is controlled by the control device 3.
0, or by reinforcing personnel at the veneer delivery department to increase the filling rate. Note that the control is automated and the detection devices TI, 'I
The control device 30 receives a signal from the hot air fan 2, etc., and when the temperature difference between the two reaches a set range, the control device 30 controls the hot air fan 1.
For example, in the case of extremely high temperature, the rotation of the fan is reduced because this indicates that the filling rate is extremely low. As the rotation of the fan decreases, the air volume at one heat point decreases, and the air volume passing through the heat exchanger 17 also decreases. Therefore, heat exchange becomes slower and heat consumption is reduced, and at the same time it is possible to reduce power consumption by lowering fan rotation.In other words, it is possible to reduce the amount of hot air suitable for the filling condition of the bulk veneers that are sent in. Drying is performed depending on the temperature, and if the temperature difference between the two detected temperatures returns to the set consolidation range over time, the fan rotation speed is returned to normal rotation by a signal from the control device. Hereafter, the fan rotation will be automatically controlled from normal rotation to decelerated rotation according to the signal from the temperature detection device.Furthermore, the veneer filling rate in the machine will be detected by the command signal from the temperature detection device, and the control will be performed in response to the signal. Fan rotation control using a control signal from the device includes a method in which the speed is changed steplessly from normal rotation to sequentially decelerated rotation, and a method in which the speed is changed in certain steps for each predetermined range.Hot air temperature detected by temperature detection device T2 Since it is possible to assume that the temperature is not substantially constant based on the specifications of the drying equipment, the temperature detection device T2 is omitted, and only the signals from one or more temperature detection devices TI arranged on the front side of the heat exchanger are used. When the set temperature is reached, alarm devices are activated one after another.
Alternatively, the configuration may be such that the amount of hot air is increased or decreased. In this embodiment, a so-called vertical hot air circulation type drying apparatus was described in which the circulation direction of high temperature hot air was the same as the direction in which the veneers, which are the objects to be dried, were transported. The same effect can be achieved using a similar method for a so-called cross-circulation type drying device. By using the above method, it is possible to grasp the actual state of the veneer filling rate, and by increasing the filling rate or controlling the amount of hot air that matches the filling rate, it is possible to reduce the low veneer filling rate that often occurred in the past. This reduces the high temperature inside the machine, the accompanying dissipation of high-temperature hot air to the outside of the machine, and the consumption of high heat energy from heat insulating plates and other parts, making it possible to save significant energy and achieve efficient veneer drying. It was. 4. Brief Description of the Drawings FIG. 1 is a side view of the drying device according to the present invention, and FIG. 2 is a front view. 1...... Entrance shelf 10... Drying device 10C... Cooling section 10F...
・・・・・・Cooling fan 10■1・・・・・・・・・
Drying section 11...Unit drying section 12...Fan drive device 13.
......Hot air fan 14...Roll 15...Ventilation duct TI1. T2 ...Temperature detection device or higher

Claims (1)

[Claims] 1. A veneer drying device I that dries the veneer by circulating hot air while conveying the veneer.The veneer was loaded into the drying device. A veneer drying method characterized in that the filling rate of the Qj board is detected by measuring the internal temperature of a drying device, and the volume or speed of circulating hot air is controlled in inverse proportion to the temperature. 2. The veneer drying method according to claim 1, wherein the hot air to be controlled is hot air that passes through a heat exchanger of a drying device. 3. The veneer drying force method according to claim 1 or 2, wherein the internal temperature of the drying device is measured by temperature detection devices installed before and after the heat exchanger. 4. The tlj-temporary drying method according to any one of claims 1 to 3, wherein the amount or speed of hot air is controlled by changing the rotation speed of a hot air fan. .