JPS6152917B2 - - Google Patents

Description

Detailed Description of the Invention (Differential Application Fields) The present invention relates to a veneer veneer drying device, and in particular, a veneer veneer to be dried is held between a fixed heating plate and a movable heating plate under pressure. This invention relates to a veneer veneer drying device which can be propelled by a pusher and its propulsion mechanism, which abuts the rear end edge of a veneer veneer while drying it.

(Conventional technology and its problems) In general, veneer veneer immediately after cutting with veneer lace contains moisture with a moisture content of 60 to 100%, so it cannot be used as is, and it must be dried to reduce the moisture content to 20%. It needs to be dried to a certain extent. For this purpose, the so-called hot air ventilation drying method has been used in the past, in which the veneer veneer is fed into a hot air drying oven, but this method has low thermal efficiency, and the veneer veneer gets distorted during drying, resulting in poor quality. It was difficult to obtain these products.

To solve this problem, the applicant previously proposed a method in which a veneer veneer is sandwiched between a fixed heating plate and a movable heating plate via an endless stainless steel belt, and then heated and dried. (Refer to Japanese Patent Application Laid-open No. 126555/1983).

However, in this type of heating plate, an endless stainless steel belt is interposed between the heating surface of the fixed heating plate and the movable heating plate and the veneer veneer to be dried.
Heat transfer to the veneer veneer was poor, and the endless belt could be damaged by heat if used for a long period of time, making maintenance difficult.

Furthermore, there was a problem in that the stainless steel endless belt was contaminated with resin and the veneer was stained.

Furthermore, Japanese Utility Model Publication No. 50-37279 discloses a veneer drying device consisting of a fixed heating plate and a movable heating plate that can approach and move away from the heating surface of the fixed heating plate. With such equipment, there was a problem in that the loading and unloading of the veneer veneers was not smooth and continuous operation was not possible, and the heating plate was contaminated with resin, causing the veneers to become dirty.

Furthermore, Japanese Patent No. 172490 discloses a veneer veneer drying device that includes a fixed heating plate and a movable heating plate and conveys the veneer veneer by a U-shaped sliding frame. However, this drying device also reciprocates intermittently to bring the veneer veneers in and out of the fixed heating plate, and the loading and unloading of the veneer veneers lacks smoothness, making it difficult to carry out continuous and smooth drying operations. In addition, there was a problem in that the heating plate was contaminated with resin and the veneer was soiled.

(Purpose) The present invention solves the above-mentioned problems by continuously carrying in and out a veneer veneer to be dried between a fixed heating plate and a movable heating plate, and directly sandwiching it between the heating plates. It is an object of the present invention to provide a veneer drying device that can heat efficiently and automatically clean the surface of a heating plate.

(Means for Solving the Problems) The veneer veneer drying apparatus of the present invention comprises: a fixed heating platen having a heating surface; a movable heating platen capable of approaching and separating from the heating surface of the fixed heating platen; A pusher is disposed along the rear end edge of a veneer veneer placed on a fixed heat platen and is in sliding contact with the fixed heat platen, and a propulsion mechanism includes an endless chain for propelling the pusher. Features.

(Function) According to the present invention, the veneer veneer to be dried is smoothly propelled between a fixed heating plate and a movable heating plate by a pusher driven by an endless chain, and is intermittently propelled between a fixed heating plate and a movable heating plate. It is squeezed between the board and the board.

Further, the resin adhering to the hot platen is removed by a pusher that slides on the hot platen surface, thereby cleaning the hot platen surface.

(Example) Hereinafter, an example of the veneer veneer drying apparatus according to the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing an embodiment of a veneer drying apparatus according to the present invention, and FIG. 2 is a plan view thereof.

In the figure, reference numeral 1 indicates a fixed heating plate, and this fixed heating plate 1 has a rectangular heating surface 2 of approximately 1 m x 1 m.
The heating surface 2 is installed horizontally. In the case shown in the figure, two fixed heating plates 1 are connected in series.
Although these are arranged in rows, you may increase or decrease the number as necessary.

On the other hand, above the fixed heating plates 1, 1, movable heating plates 4 each having a heating surface 3 of the same size are provided so as to be movable up and down along a guide column (not shown). This movable hot platen 4 can be vertically moved up and down by drive devices 5, such as hydraulic cylinder devices, for example. These driving devices 5, 5...5 are arranged at the four corners of the movable heating plate 4, etc., as shown in FIG. 2, and each driving device 5 is driven synchronously. Fixed heating plate 1 above
And the movable heating plate 4 uses heating steam, thermo oil,
It is heated to a predetermined temperature by a heat source such as electric heat.

On both sides of the above-mentioned fixed hot platens 1, 1, endless chains 6, 6 with their tensioned sides facing upward are provided over the entire area of the two fixed hot platens 1, 1, for example. These endless chains 6 are suspended in parallel between a driving sprocket 7 and a driven sprocket 8, and are driven by the driving sprocket 7.

In addition, in front and behind the fixed heating plates 1, 1, there are guide rollers 10, which are maintained at approximately the same level as the heating surface 2.
10, ..., 10 are installed, and veneer veneer P
The introduction and delivery of the system is smooth.

Therefore, a plurality of pushers 11, 11, .
The endless chains 6, 6 are set in advance at a height such that the pusher 11 can run on the upper surface of the heating surface 2 of the fixed heating plate 1.

As is clear from FIGS. 2 and 3, the pusher 11 comes into contact with the rear end of the veneer veneer P and acts to push out the veneer veneer P. The pusher 11 shown in FIG. 3 has a rectangular cross section, and the height of the pusher 11 is predetermined to be lower than the thickness of the veneer veneer P to be dried.

Further, the pusher 11 shown in FIG. 4 is composed of a spring plate, and its cross-sectional shape is such that its tip opens in the direction opposite to the direction in which the pusher 11 moves. The tip portions are adapted to come into sliding contact with the heating surfaces 2 and 3 of the fixed heating platen 1 and the movable heating platen 4, respectively. Such a pusher 11 has a cleaning effect of effectively removing rust, tar, etc. on the heating surfaces 2 and 3 as it advances while slidingly contacting the heating surfaces 2 and 3.

Furthermore, in FIGS. 3 and 4, the movable heating platen 4 is provided with a stopper 12 whose height is adjustable, and the stopper 12 is adjusted to be slightly lower than the height of the veneer veneer P to be dried. There is. This prevents the veneer from being pressed more than necessary.

FIG. 5 shows an example in which the fixed heating plate 1, movable heating plate 4, and endless chain 6 described above are covered with a housing 14. In this way, heat loss is prevented, heating effect is greatly improved, and thermal efficiency is improved. can be increased.

An exhaust pipe 15 is provided on the top plate of the housing 14 so that the steam inside the housing 14 can be exhausted.

Further, the embodiment shown in FIG. 6 shows an example in which the fixed hot platen 1 is divided into four pieces in the width direction, and in this case, the endless chain 6 is divided into four pieces, each of which is divided into four pieces.
It is arranged so that it runs on both sides of B, 1C, and 1D.

Furthermore, in the embodiment shown in FIGS. 7A and 7B, running grooves 16, 16, . ..., 6, this running groove 16, 16, ...,
The vehicle is configured to run within 16 hours.

In this case, the endless chains 6, 6, . . . , 6 do not necessarily need to be engaged with the pushers, except for those on both sides.

For example, as shown in FIG. 8, it is only necessary to attach a friction plate 17 whose surface is appropriately uneven or roughened to the outer periphery of the endless chain 6, and to slide it into contact with the bottom surface of the veneer veneer.

Moreover, it is not necessary to extend the pushers to the endless chains on both sides, and as shown in FIG. Adjacent mold members 18 may be mounted in a row in the lateral direction with their ends close together so that they can come into sliding contact with substantially the entire surface of the fixed hot platen.

In the above embodiment, a single plate is shown, but it goes without saying that it can be constructed in multiple stages.

Further, the endless chain is not limited to the above-mentioned embodiment, and can be replaced with another propulsion mechanism having a single-plate propulsion function.

(Effects of the Invention) As described above, according to the present invention, since the veneer veneer to be dried is directly sandwiched and heated between the fixed heating plate and the movable heating plate, good heat transfer is achieved. The drying time can be shortened. In addition, since the pusher is brought into contact with the rear end of the veneer veneer to be dried and pushed out, the veneer veneer can be reliably introduced and delivered between the fixed heating plate and the movable heating plate, and the heat By constantly cleaning the surface of the board, it is possible to prevent staining due to resin adhering to the surface of the heated veneer board.

Note that when the fixed heating plate, movable heating plate, pusher, and propulsion mechanism are sealed with a housing, the heating temperature can be maintained without heat being released to the outside, and thermal efficiency can be increased.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a veneer drying apparatus according to the present invention, FIG. 2 is a plan view of the same, and FIG.
The figure is a side sectional view showing the pusher and stopper.
FIG. 4 is a side sectional view showing a modified example of the pusher, FIG. 5 is a side sectional view showing a veneer veneer drying device housed in the housing, and FIG. Plan view showing fixed heating plate, Figure 7A
8 is a plan view showing a fixed heating plate according to still another embodiment of the present invention, B is a front view in the direction of arrow B in FIG. FIG. 9 is a perspective view showing a friction plate, and FIG. 9 is a perspective view showing an L-shaped member used as a pusher in still another embodiment of the present invention. 1... Fixed heating plate, 2, 3... Heating surface, 4... Movable heating plate, 5... Drive device, 6... Endless chain, 1
1... Pushya, 14... Housing, 15...
Exhaust pipe.

Claims (1)

[Claims] 1. A fixed heating plate with a heating surface, a movable heating plate that can approach and move away from the heating surface of the fixed heating plate, and a veneer veneer placed on the fixed heating plate. A veneer veneer drying device characterized by comprising a pusher disposed along the rear edge and slidingly in contact with the fixed heating platen, and a propulsion mechanism comprising an endless chain for propelling the pusher. 2. The veneer veneer drying apparatus according to claim 1, wherein the pusher has a height smaller than the thickness of the veneer to be propelled. 3. The pusher is made of spring material and has a cross section that widens in the direction opposite to the direction of travel, so that its tip comes into sliding contact with the heating surfaces of the fixed heating plate and the movable heating plate. A veneer drying apparatus according to claim 1 or 2, characterized in that the veneer drying apparatus comprises: 4. The veneer according to any one of claims 1 to 3, wherein the fixed heating plate, the movable heating plate, the pusher, and the propulsion mechanism are surrounded by a housing having a discharge port. Veneer drying equipment.