JPS6232390B2 - - Google Patents

Description

Detailed Description of the Invention The present invention is a hot plate dryer that dries raw veneers by contact heating with a hot plate, in which the dried veneer is removed from the heating surface of the hot plate, and as the veneer is removed, the green veneer is removed. The present invention relates to a veneer processing device that inserts veneers into a dryer.

Hot plate drying using hot plate contact heating has better thermal efficiency than the commonly used hot air drying, and the drying time can be significantly shortened.Since the raw veneer is dried in a stationary state, it is easier to dry the veneer by conveying it. It has many advantages such as no damage and flat dried veneer can be obtained by the ironing effect. However, since the green veneer is dried by contacting with a hot plate, there is no possibility that it will be contained in the green veneer during the drying process. The resin and other organic matter oozes out onto the surface of the veneer, causing the dried veneer to adhere to the heating surface, which can damage the veneer or make it difficult to remove it when removed, especially in the case of raw veneer that has been stripped horizontally. However, since the adhesive used for bonding is added to this, there is a drawback that it becomes more difficult to peel and remove the dried veneer.

The present invention aims to eliminate the drawbacks of hot plate drying and also to automatically insert green veneers, and will be described below with reference to the drawings.

The plurality of hot plates 1 are heated by an appropriate heat source such as steam or a heater, and are moved to the closed state shown in FIG. 1 and the closed state shown in FIG. 3 by an operating mechanism 2 that opens and closes the hot plates 1. It is constructed so that it can be opened and closed freely. When the hot plate 1 is in the closed state, its heating surface 3 comes into contact with the green veneer A inserted between the hot plates, and the green veneer A is heated and dried.

The raw veneers A are inserted between the hot plates 1 with their fibers aligned in the same direction, and the fibers of each hot plate 1 are inserted in a direction that is almost perpendicular to the fiber direction of the inserted raw veneers A. A plurality of grooves 4 are bored on each heating surface 3. The number of grooves 4 to be drilled on each heating surface is appropriately set depending on the length of the raw veneer A in the fiber direction, but it is usually 2 to 3 places, and the grooves 4 are in the number of holes. As shown in FIG. 2, they may be provided vertically in a row, or may be provided at appropriate positions on each hot plate.

In the first invention, a bar-shaped detachment body 5 is disposed in each of these grooves 4, and one end of the bar-shaped detachment body 5 is a fulcrum end 5a.
is supported by a fulcrum 6 attached to the side surface of the hot plate 1, and the other swinging end 5b is supported by an operating mechanism 7 such as an air cylinder attached to the other side of the hot plate 1. Then, by the operation of the actuation mechanism 7, the detachment body 5 is swung around the fulcrum 6, and the detachment body 5 is moved to a position within the groove 4 shown in FIG. move forward and backward between

The advancement of this separation body 5 across the heating surface 3 is as follows:
After the drying of raw veneer A is completed and dry veneer A' is obtained, this process is carried out when hot plate 1 is open.
A' is separated from the heating surface 3 of the hot plate 1 as shown in FIG. When the detachment is completed, the detachment body 5 is returned to its original position in the groove 4, but the dry veneer
A' may be taken out of the machine in the state shown in FIG. 3, or after the dried veneer A' is placed on the heating surface 3.

In this way, the present invention has a plurality of grooves 4 bored in a direction substantially perpendicular to the fiber direction of the green veneer A to be inserted into the heating surface 3 of the hot plate 1, and a release body is placed in each groove 4. Because of this arrangement, heating drying of the raw veneer A using the hot plate 1 can be carried out in the same way as normal hot plate drying, and the bar-shaped detachment body 5 can separate the veneer A' from the heating surface 3 when the dry veneer A' is separated from the drying plate A. Since it acts in the direction perpendicular to the fiber direction of the veneer, it does not cause any damage to the veneer, and since it advances across the heating surface 3, the veneer can always be reliably peeled off from the heating surface 3. Peeling makes it possible to automatically take out the veneer, and furthermore, since the grooves 4 serve as passages for discharging evaporated moisture, more effective hot plate drying can be performed.

Incidentally, instead of forming grooves in the heating surface of the hot plate as in the above embodiment, the hot plate 1 is divided into a plurality of hot plates 1a and 1b as shown in FIGS. 2 and 4. ,
A gap 8 is provided between the divided hot plates 1a and 1b, bar-shaped breakaway bodies 5 are arranged in the gap 8, and each breakaway body 5 is heated when the hot plate 1 is in an open state. Side 3
This can also be done in the same way by moving the robot forward and backward in a manner that crosses the road. Further, in the embodiment described above, only one end of the detachable body 5 is swung, but as shown in FIG. The same effect can be achieved even if the separation body 5 is configured to move back and forth across the heating surface 3 almost parallel to the heating surface 3.

As shown in FIG. 6, the second invention has a detachable body 9,
9' (9 is for the upper surface of the hot plate 1, 9' is for the lower surface) is arranged on the side of the hot plate 1 provided with each groove 4 (or the gap between the divided hot plates), and the detachable body 9, 9' is reciprocated between the groove 4 or the gap, and moved back and forth across the heating surface 3 of each hot plate 1 in the groove or gap to remove the dried veneer A' from the heating surface 3. It is meant to be peeled off.

As shown in the figure, when the hot plate 1 is in an open state, the bar-shaped breakaway bodies 9, 9' are shown by solid lines on the hot plate 1.
from the side position to the position in the groove 4 of the heating plate 1 shown by the dotted line, then from the position in the groove 4 to the position shown by the dashed-dotted line extending across the heating surface 3, and from the position shown by the dashed-dotted line. The detachable bodies 9, 9' are sequentially reciprocated and moved back and forth from the position shown by the dotted line to the position shown by the solid line (the mechanism for reciprocating and moving back and forth is not shown). When the dry veneer A' is advanced from the heating surface 3 shown by the dashed line, it is removed from the heating surface 3, and when the separation is completed, it returns to the position shown by the dotted line and the dried veneer A' is placed on the heating plate 1. , and return to the waiting position shown by the solid line.

Note that the detachable body 9' for the lower surface of the hot plate 1 is made of dry veneer.
Since A' is peeled off when it adheres to the bottom surface of the hot plate 1, it is possible to immediately return the separation body from the position indicated by the dashed line to the position shown by the actual results in the operation of the detachment body, and also to remove the top surface of the hot plate 1. When the detachment body 9 also reaches the position indicated by the dashed-dotted line and supports the dried veneer A', if the take-out device is to take out the dried veneer A' from the machine, move the detachment body 9 to the position indicated by the dashed-dotted line. It is possible to immediately return from the position to the position shown by the solid line.

Next, when the detachment body 9 also serves as a transfer body for inserting the raw veneer A between the hot plates, the raw veneer A is received at a position on the side of the hot plate 1 shown by the two-dot chain line in the figure. , the detachment body 9 is moved from the position shown by the one-dot chain line to the position shown by the dotted line, and the green veneer A is placed on the heating surface 3 of the hot plate 1, and then returned to the position shown by the two-dot chain line, and the hot plate 1 is closed and raw veneer A is heated and dried. When drying is finished and the hot plate 1 is in the open state, move the detachment body 9 through the position indicated by the dotted line to the position indicated by the one-dot chain line, take out the dried veneer A' out of the machine, and then move it to the position indicated by the two-dot chain line. Return it to its original position as shown in .
In this case, the detachment body 9 may be configured to operate so that after placing the green veneer A on the heating surface 3, it remains in the groove 4 until drying is completed.

In the second invention, compared to the first invention, it is necessary to reciprocate the detachment body between the position on the side of the hot plate and the position in the groove or gap, making the device more complicated. Since the detachment body is always in the groove or the gap and is not affected much by the heat of the hot plate, there is an advantage that the detachment body does not need to be heat resistant, and it is easy to use. It can also be used to insert boards, and can also take out dried veneers if necessary.

As described above, the present invention divides the hot plates in a direction perpendicular to the fiber direction of the green veneer inserted between the hot plates to provide a gap, or creates a groove in the heating surface, and creates a gap or a groove. By using a simple structure that includes a detachment body that moves forward and backward across the heating surface in the groove, the dried veneer can be reliably peeled off from the heating surface without causing any damage to the veneer. This makes it possible to automate veneer processing in a hot plate dryer, which was previously impossible, and the configuration in which the detachment body is reciprocated between the side of the hot plate and the position in the groove or gap is It also makes it possible to automatically insert veneers by the machine, greatly shortening and simplifying the veneer drying process, and making a great contribution to the plywood industry.

[Brief explanation of the drawing]

Figures 1 to 5 show the first invention;
The figure is a front view with the hot plate in the closed state, and the second figure is the first one.
3 is a front view with the hot plate in an open state, FIG. 4 is a plan view of FIG. 1, and FIG. 5 is a partial front view showing another embodiment. , Figure 6 is the second
FIG. 3 is a front view of the hot plate of the invention in an open state. 1, 1a, 1b...hot plate, 3...heating surface, 4...concave groove, 5...separation body, 5a...fulcrum end, 5b...swinging end,
7... Actuation mechanism, 8... Gap, 9, 9'... Separation body, A
... Fresh veneer, A'... Dry veneer.

Claims (1)

[Scope of Claims] 1. In a hot plate dryer in which green veneer is inserted between a plurality of hot plates configured to be openable and closable and dried by contact heating of the hot plates, the fibers of the green veneer inserted Each heating plate is divided into a plurality of pieces and gaps are provided at multiple places, or grooves are bored at multiple places on the heating surface of each heating plate in a direction substantially perpendicular to the direction. A bar-shaped breakaway body that moves forward and backward across the heating surface of each heating plate is installed inside the heating plate, and when the green veneer is finished drying and the hot plate is open, each breakaway body is separated from the Alternatively, a veneer processing apparatus is characterized in that the dried veneer is moved out from within the groove so as to cross over the heating surface of each heating plate to separate the dried veneer from the heating surface. 2. In a hot plate dryer that dries green veneer by contact heating of the hot plates by inserting the green veneer between a plurality of hot plates configured to open and close freely, a direction substantially perpendicular to the fiber direction of the green veneer to be inserted. In this case, each hot plate is divided into multiple pieces and gaps are provided at multiple places, or grooves are bored at multiple places on the heating surface of each hot plate, and the side of the hot plate where each gap or groove is provided is On the other hand, a bar-shaped separation body is provided which moves back and forth between the gap or the groove and moves back and forth across the heating surface of each hot plate in the gap or groove. When the drying of the board is completed and the hot plate is in an open state, each detachment body is advanced from within the gap or groove so as to cross the heating surface of each hot plate to separate the dried veneer from the heating surface. A veneer processing device featuring: 3. The veneer processing apparatus according to claim 2, wherein the detachment body is a transfer body that transfers the raw veneer from a position on the side of the hot plate to the heating surface of the hot plate.