JP3510699B2 - Wood press forming method and apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pillar or plate material having a high density and a high strength by processing a material such as a log material into a pillar or a plate material without sawing the material, or consolidating the manufactured product in the vertical direction. TECHNICAL FIELD The present invention relates to a method for press-forming wood and a device for the same, which are used when processing into wood.

[0002]

2. Description of the Related Art When processing a log material or the like into a pillar material without sawing it, or processing the sawed product in the vertical direction to process it into a high-density / high-strength pillar or plate material, wood is used. It is well known that the material is softened by heating, press-molded, and its shape is fixed by steam at high temperature and high pressure.

In the conventional wood press-molding method, wood is heated in a pressure vessel by high temperature and high pressure steam to be softened, and the wood is press-molded in a pressure vessel or under a normal pressure by a facing mold, or in a pressure vessel. It is pressed into a molding die with, and the shape is fixed with steam at high temperature and high pressure. It is possible to mold a free shape by changing the molding die.

[0004]

However, in the conventional method, since the press molding is carried out in the pressure vessel by a molding die facing each other in the pressure vessel or under normal pressure, or the molding is carried out by pushing into the molding die in the pressure vessel, There is a limit to the amount of wood that can be set at one time, and it takes about 2 hours to process each piece of wood.

Further, in the case of press-molding with a facing mold, unless the wood is set in a single mold or a plurality of molds and press-molded for several tens of minutes, the skin portion of the wood will crack, resulting in cracking. When the degree of is large, it cannot be used.

Further, it has been impossible to impart a complicated uneven shape to the surface or a circular uneven shape such as a diaphragm log.

As described above, the conventional method has many disadvantages in terms of production efficiency, manufacturing cost, etc., except for the case of press-molding a product having a special shape, and is not practical.

As a method other than the above-mentioned method, there is a method of heating thin wood with a hot press and engraving-type compaction pressing on a flat surface or a surface, but it is difficult to fix the shape of the compaction, and it tends to be partially recovered. Can be seen, and thick (1
It takes about 2 hours to process (0 mm or more), and only one sheet can be processed, resulting in very poor production efficiency.

The present invention has been proposed in view of the above problems, and it is an object of the present invention to provide a wood press molding method and an apparatus therefor which are excellent in terms of production efficiency, manufacturing cost and the like.

[0010]

[Means for Solving the Problems] In order to achieve the above object, the present invention softens a large amount of wood by once heating it with high-temperature and high-pressure steam, microwave, hot water, etc. Continuously compress and form with a continuous compression device and push into each fixed mold, and the wood in the state of being pushed into this fixed mold is stored in a high temperature and high pressure container in a large amount at once and steam of high temperature and high pressure is steamed. It is designed to be fixed in.

[0011]

According to the present invention, a large number of wood pieces can be continuously compression-molded at one time, and the molding time per piece can be greatly shortened.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wood press molding method and apparatus according to the present invention will be described below with reference to the embodiments shown in the drawings.

1 to 4 are drawings showing an example of an apparatus for compression-molding square and plate materials by the method of the present invention. FIG. 1 is a schematic overall view, and FIGS. 2 and 3 are lines AA and B of FIG. It is an expanded sectional view in the B line.

In FIGS. 1 to 4, (1) is wood such as timber and plate, and (2) is a charging device arranged at a supply position of wood (1), for example, a piston rod of a pushing cylinder (3). The pusher (4) is fixed to the tip of the pusher (3a), and the pusher cylinder (3) is operated to appropriately feed and dispose the wood (1) at the feed position by the appropriate feeding means by the pusher (4). Push it into the compression molding device (5).

The compression molding device (5) is a lattice conveyor,
A pair of molding conveyors (6) (6) consisting of a chain conveyor, steel belt conveyor, roller conveyor, etc.
The molding conveyors (6)
A pair of molding guides (7) and (7) are arranged between (6) so as to face each other on the left and right. The facing interval between the upper and lower molding conveyors (6) and (6) is set to be gradually narrow from the starting end of the right end in the figure to the vicinity of the middle. In addition, the facing interval between the left and right molding guides (7) and (7) is set to gradually decrease from one end of the right end in the figure corresponding to the starting end of the molding conveyors (6) and (6) to the vicinity of the middle of the wood (1). ing. Then, steam ejecting means (20) (20) for ejecting steam are disposed above and below the upper and lower molding conveyors (6) (6),
By exposing the steam ejected from the steam ejecting means (20) (20) to the molding conveyors (6) (6),
The wood (1) is heated via the forming conveyors (6) and (6). Further, the left and right molding guides (7) and (7) are provided with water vapor passages (8) and (8) in the vicinity of opposite side surfaces, and the water vapor passages (8) are formed.
The steam supply pipes (9) and (9) are connected to one end of (8) and the steam discharge pipes (10) and (10) are connected to the other end of the steam supply pipes (9) and (9). 8)
By flowing water vapor into (8), passing this water vapor through the water vapor flow paths (8) and (8) and outflowing to the water vapor discharge pipes (10) and (10), the left and right molding guides (7)
It is designed to heat (7). In the embodiment shown in the drawings, the left and right molding guides (7) are supplied by supplying steam to the water vapor flow paths (8) and (8) of the left and right molding guides (7) and (7). Although (7) is heated, it is also possible to heat the left and right molding guides (7) and (7) by an appropriate heating means other than this.

Reference numeral (11) is a temporary molding fixing device which is connected to the end of the compression molding device (5) at the left end in the figure.
A pair of cooling conveyors (12) (1 including chain conveyor, steel belt conveyor, roller conveyor, etc.
2) is the molding conveyor (6) of the compression molding device (5)
The end portions of (6) are arranged so as to be flush with each other so as to be flush with each other, and a pair of cooling guides (13) and (13) are installed between the cooling conveyors (12) and (12). The guides (7) and (7) of 5) are arranged opposite to each other so as to be flush with the end portions of the molding guides (7) and (7). Cooling liquid jetting means (14) (14) for jetting a cooling liquid such as water are provided above and below the upper and lower cooling conveyors (12) (12), and from this cooling liquid jetting means (14) (14). The wood (1) is cooled through the cooling conveyors (12) and (12) by pouring the jetted cooling liquid onto the cooling conveyors (12) and (12). Further, the left and right cooling guides (13) (13) have cooling liquid flow paths (15) (15) formed in the vicinity of opposite side surfaces, and these cooling liquid flow paths (15) (15) The cooling liquid supply pipes (16) (16) are connected to one end, and the cooling water discharge pipes (17) (17) are connected to the other end.
Cooling liquid such as water is supplied from the cooling water flow passages (15) and (15) from the cooling water flow passages (15) and (15) to the cooling water discharge pipes (17) and (16), respectively. The wood (1) is cooled via the cooling guides (13) and (13) by allowing the wood (1) to flow out. In the embodiment shown in the drawings,
Coolant flow path (15) for left and right cooling guides (13) (13)
The left and right cooling guides (13) and (13) are cooled by supplying and passing the cooling liquid to (15). 13) It is also possible to cool (13).

Reference numeral (18) is a molding and fixing die for accommodating the compression-molded wood (1) in order to completely fix it, and an appropriate supply means is provided to the side of the left end of the molding temporary fixing device (11) in the figure. In this way, the supply is arranged in a timely manner.

Next, the method for press-molding wood according to the present invention will be described.

First, a feeding device (2) and a compression molding device (2) and a compression molding device (2) with a suitable supply means for a wood (1) which has been softened by previously heating a large amount at a time with high-temperature and high-pressure steam, microwaves, warm water, etc. 5) are continuously supplied one by one to a supply position between them, and are fixed to the tip of the piston rod (3a) of the pushing cylinder (3) by the operation of the pushing cylinder (3) of the charging device (2). The wood (1) that has been heated and softened by the pusher (4) is pushed and continuously charged into the compression molding device (5), and the molding conveyors (6) (6) above and below the compression molding device (5) and Left and right molding guides (7)
The wood (1) heat-softened in (7) is gradually compression-molded continuously from the tip to a predetermined height and width.

Wood (1) compression-molded in this way
Is a molding conveyor (6) above and below the compression molding device (5)
While being compression-molded by (6) and the left and right molding guides (7) (7), they are continuously conveyed to the temporary molding fixing device (11) by the upper and lower molding conveyors (6) (6), and this temporary molding fixing is performed. The upper and lower cooling conveyors (12) (12) and the left and right cooling guides (13) (13) of the device (11) are continuously cooled to temporarily fix the compression molding.

In this way, the wood (1) temporarily fixed by compression molding has the upper and lower cooling conveyors (12) (12) and the left and right cooling guides (13) (1) of the temporary molding fixing device (11).
While the compression molding is fixed in 3), it is continuously sent to the end side of the temporary molding fixing device (11) by the upper and lower cooling conveyors (12) (12), and the end side of this temporary molding fixing device (11). One of them is continuously pushed into a fixed mold (18) which is continuously fed one by one by an appropriate feeding means.

The fixed mold (18) thus formed
A large amount of wood (1) pressed into the pressure vessel is stored in a pressure vessel at a time, and fixed in the pressure vessel with high-temperature and high-pressure steam to completely fix the compression molding.

According to the present invention, the wood (1) which has been heated and softened in a large amount at one time is continuously press-molded under normal pressure to be pushed into the molding fixed mold (18), and at the same time, the molding fixed mold ( 1
Since a large amount of wood (1) pressed into 8) can be fixed at one time, the processing time per piece can be greatly shortened. As a result, the production efficiency can be improved and the manufacturing cost can be significantly reduced.

In the wood pressing method of the present invention, for example, 1
Softened by heating with steam of 00 ℃ for about 1 hour □ 100mm × L
A 1000 mm square bar was able to be pressed into a T50 mm × W 100 mm × L 1000 mm molding fixed die (18) in about 3 minutes. Also, φ 1
A 40mm x L2000mm log was pressed into a □ 100mm x L2000mm fixed mold (18) in about 5 minutes and fixed with steam at 180 ° C for 20 minutes. The compression molded material was compressed even when boiled. The shape at the time of molding was fixed.

The above is one embodiment of the present invention.
The invention is not limited to this example. For example, in the above embodiment, the wood (1) that has been preheated and softened is used.
Is pushed by the pushing cylinder (3) of the feeding device (2) and fed into the compression molding device (5), but the compression molding device (5) does not rely on the pushing cylinder (3) of the feeding device (2). It is also possible to add only the molding conveyors (6) and (6) above and below 5).

Further, in the above-mentioned embodiment, the case where the wood (1) such as a lumber or a plate is compression-molded in the vertical direction and the left-right direction is described, but the present invention compression-molds the wood (1) only in the vertical direction. can do. In this case, the opposing intervals of the left and right molding guides (7) and (7) of the compression molding device (5) are set to a constant interval from the right end to the left end in the figure.

Further, in the above-mentioned embodiment, the case where the square bar or the plate material is compression molded is described, but the present invention is a log material,
Other compression moldings are possible. For example, when a large-diameter log material is compression-molded into a small-diameter log material, as shown in FIG. 5, a conical cone die (19) is used.
Is provided between the pushing cylinder (3) of the charging device (2) and the cylindrical fixed mold (18), and the wood (1) that has been heated and softened in a large amount at a time is loaded into the charging device (2). By pressing the cone die (19) from the large diameter side of the cone die (3), pushing it out from the small diameter side and pushing it into the cylindrical fixed mold (18), compression molding of a log material smaller than the original diameter is performed. be able to. Further, in order to perform compression molding into a columnar and uneven shape such as a squeezed log, the wood compression-molded into a cylindrical shape is pushed into a cylindrical fixed mold and dried,
After this wood is housed in a fixed mold having a two-part structure with irregularities on the inner peripheral surface and recovered by steam at low temperature (120 ° C), the wood is filled with the molding fixed mold having irregularities on the inner peripheral surface. ,
By fixing the shape with steam at high temperature and high pressure, it is possible to perform compression molding into a columnar and uneven shape such as a drawn log.

Further, in the above-mentioned embodiment, the molding guides (7), (7) are formed by processing a plate or the like, but they may be rollers.

In the above embodiment, the fixed mold (18) is fixed.
The wood (1) pushed into the pressure vessel is fixed with steam at high temperature and high pressure in order to completely fix it, but the wood (1) pushed into the fixed mold (18) ( Even if 1) is heated in a high-temperature furnace, the wood (1) still contains water, so the water becomes high-temperature, high-pressure steam, so it is fixed in the pressure vessel with high-temperature, high-pressure steam. The same effect as the treated one can be obtained.

[0030]

As described above, according to the present invention,
Since a large amount of wood can be continuously press-molded at one time, the processing time per piece can be significantly shortened, which is extremely advantageous in terms of production efficiency, manufacturing cost, and the like.

[Brief description of drawings]

FIG. 1 is a schematic overall view of an apparatus for carrying out the method of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line BB of FIG.

FIG. 4 is a schematic perspective view of a compression molding device.

FIG. 5 is a schematic overall view of an apparatus according to another embodiment of the present invention.

[Explanation of symbols]

1 wood 2 Input device 3 Push-in cylinder 4 pushers 5 compression molding equipment 6 Molding conveyor 7 Molding guide 8 steam flow paths 11 Molding temporary fixing device 12 Cooling conveyor 13 Cooling guide 14 Coolant ejection means 15 Coolant flow path 18 Molded fixed type 19 Corn Dice

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B27K 5/00 B27K 1/00 B27K 5/06 B27D 3/00 B27L 5/00 B27M 3/00

Claims (4)

(57) [Claims] 1. A large amount of wood is softened by heating it at a time with high temperature and high pressure steam, microwaves, warm water, etc.,
This wood is continuously compressed and formed by a continuous compression device under normal pressure and pushed into each molding fixed mold, and a large amount of the wood pressed into this molding fixed mold is stored in a high temperature and high pressure container at one time. Then, the method for press-molding wood is characterized in that it is fixed with steam at high temperature and high pressure. 2. A pair of molding conveyors are arranged vertically opposite to each other such that the facing interval gradually narrows from the start end to the vicinity of the middle, and a pair of molding guides are provided between the upper and lower molding conveyors. Similarly to the conveyor, a compression molding device that is disposed on the left and right such that the facing interval gradually narrows from the start end to the vicinity of the middle, and that has an appropriate heating means for heating the molding conveyor and the molding guide, and A pair of cooling conveyors cooled by the cooling means of
Vertically opposed to the end of the molding conveyor so as to be flush with each other, and a pair of cooling guides between the cooling conveyors are horizontally opposed to the other end of the molding guide. And a molding temporary fixing device having an appropriate cooling means for arranging and cooling the cooling conveyor and the cooling guide. The wood which has been previously softened by heating is continuously charged into the compression molding device to perform the compression molding. The upper and lower molding conveyors and the left and right molding guides of the apparatus continuously perform compression molding, and the upper and lower cooling conveyors and the left and right cooling guides of the molding temporary fixing apparatus are used to cool and temporarily fix the compression molding. At the same time, the wood press-molding device is characterized in that it is continuously pushed into a mold-fixing die that is continuously supplied and arranged to the side of the terminal end of the mold-temporary fixing device. 3. The press molding of wood according to claim 2, further comprising a charging device for continuously charging the heat-softened wood to the compression molding device on the side of the start end of the compression molding device. apparatus. 4. The cone die between a charging device for continuously pressing preheated and softened wood by a pressing cylinder and a position at which a molding and fixing die containing the compression-molded wood is continuously supplied. And a press-molding apparatus for wood, wherein the wood heated and softened by the pressing cylinder is continuously pressed into the fixed mold through a cone die.