JP3202065B2 - Wood processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for hardening wood, forming the wood into a desired shape without lumbering, and manufacturing various plywood (for example, LVL, veneer, etc.). The present invention relates to a wood processing apparatus used for steam treatment or the like for the purpose of improving reforming and drying efficiency.

[0002]

2. Description of the Related Art In general, soft wood such as cedar, larch, and poplar is used as a building material, but its use is limited due to low robustness.

[0003] In order to expand the range of use of such wood, studies have been carried out to strengthen the wood, and as a result of intensive research, the present applicant has found that wood can be placed in a high-temperature, high-pressure steam atmosphere. It has been found that compressing and fixing after softening is an extremely effective means for hardening the wood. In Japanese Patent Application No. 2-1171979, the wood is heated and steamed at a high temperature and a high pressure in a container. After being softened by heating, the material is compressed and fixed by a press molding machine to secure the wood, and to treat the wood in a desired shape without processing the lumber. The device is proposed.

As shown in FIG. 2, for example, the above wood processing apparatus includes a pair of press dies (2) in a processing vessel (1) made of high-strength steel or stainless steel to withstand high temperature and high pressure. (3) is vertically arranged opposite to each other, and one of the pair of press dies (2) and (3), for example, the press dies (2) is disposed downward on the upper outside of the processing vessel (1) by a suitable attaching means. The high temperature and high pressure steam is supplied into the processing vessel (1) to place the wood (W) in the high temperature and high pressure steam atmosphere, and the wood (W) Is heated and softened by steam, and thereafter, the wood (W) is cut into a predetermined cut by lowering a press mold (2) with a press cylinder (4) and applying a mechanical compressive force. Compressed to the area ratio, and furthermore, this wood (W) By placing in high temperature and high pressure steam atmosphere in 1) within, it is to immobilize the deformation by compression molding of wood (W).

[0005] According to the processing apparatus, the wood (W) is heated and softened in a high-temperature and high-pressure steam atmosphere in the processing vessel (1) and compression-molded. It becomes small and hard and becomes strong woody, and the wood (W) can be formed into a desired shape without performing lumber processing. In addition, since the wood (W) is placed in a high-temperature and high-pressure steam atmosphere in a compressed state to fix the deformation due to the compression molding, the wood (W) undergoes a chemical change by the steam to be fixed, and is then heated or heated. The deformation does not return due to water absorption.

In FIG. 2, (5) is a supply pipe for supplying high-temperature and high-pressure steam from a steam generator (not shown) into the processing vessel (1), and (6) is a processing vessel (1).
This is a discharge pipe for discharging the water vapor drain and the like inside to the outside.

[0007]

In the above processing apparatus, wood (W) is heated and softened by placing it in a high-temperature, high-pressure steam atmosphere in the processing vessel (1). It is difficult to reach water vapor, so that it takes time to heat the wood (W), and there is also a problem that the heating temperature is different between the surface and the inside of the wood (W) and the heating is not uniform, so that the quality is not good.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to perform processing in a short time.
Moreover, it is an object of the present invention to provide a wood processing apparatus capable of obtaining a high quality product.

[0009]

In order to achieve the above-mentioned object, the present invention provides a high-temperature, high-pressure processing vessel in which a pair of press dies having facing surfaces are arranged to face each other in accordance with the compression molding shape of wood. It is heated by steam by a pair of press dies.
Compression molding of heat-softened wood and its change by compression molding
Wood treatment equipment that fixes the shape with steam
Te, a pair of steam head on both sides of the pair of press dies, to face arranged closely on both sides of the timber to be compacted by the pair of press dies, high temperature and high pressure to one of the pair of steam head Connected to a water vapor supply means for supplying water vapor and an atmosphere opening or suction means, and
The other is the above-mentioned open air part or suction means and the above-mentioned steam
It is connected to the supply means .

[0010] The present invention also provides the above-mentioned pair of steam heads.
The above-mentioned water vapor supply means and the above-mentioned open air part or suction means
Alternately connected to said timber from said pair of steam head
Is supplied alternately with steam .

Further, the present invention provides the above-mentioned pair of steam heads.
The is obtained as respectively connected to the steam supply means, simultaneously supplying steam to the timber from the pair of steam head.

[0012]

According to the present invention apparatus, by flowing a high temperature and high pressure steam between a pair of steam head, inside the high-temperature high-pressure steam flows of wood, wood by the water vapor can be heated and softened quickly. Also, from both sides of the wood
By flowing high-temperature and high-pressure steam alternately or simultaneously,
The material can be heated uniformly.

[0013]

An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is a schematic structural view of a wood processing apparatus according to the present invention. (11) is a processing vessel made of steel or stainless steel to withstand high temperature and high pressure, and an ejector (not shown). The interior of the processing vessel (11) is evacuated by exhausting air to the atmosphere through an exhaust pipe (13) provided with an exhaust valve (12) by the negative pressure generated by the vacuum pressure, and the steam drain and the like accumulated inside the processing vessel (11) Is discharged through a drain pipe (15) provided with a drain valve (14).

(16) and (17) are a pair of press dies which are disposed inside the processing vessel (11) so as to face each other up and down, and the opposing faces are formed according to the compression molding shape of wood (W). ing. One of the pair of press dies (16) and (17), for example, the press dies (16) are integrally connected to a press cylinder (18) which is disposed downward on the upper outside of the processing vessel (11) by appropriate means. And the other press mold (17) is supported on the bottom of the processing vessel (11) via a support member (19), and one press mold (16) is pressed by the press cylinder (18) into the other press mold (16). The wood (W) is configured to be compression-molded into an arbitrary shape by relatively moving, that is, descending, so as to approach the press die (17).

(20) and (21) are a pair of press dies (16)
(17) A pair of water vapor heads disposed on opposite sides of wood (W) in close contact with both sides, and has a large number of small holes set to an arbitrary size, for example, on the lower surface of the head body having a box cross-sectional shape It is formed by fixing a punching plate or the like. One of the pair of steam heads (20) and (21), for example, a steam head (20) is connected to a steam supply device (not shown).
And a first steam pipe (22), and the other steam head (21) is connected to an atmosphere opening section (not shown ) via a second steam pipe (23). Then, the first steam supply valve (2) of the first steam pipe (22)
4) A third steam supply valve (26) provided with a second steam supply valve (26) is provided between the upstream side (22a) and the upstream side (23a) of the second steam pipe (23) from the first steam exhaust valve (25). The first steam in the second steam pipe (23) and the second steam pipe (23) are communicated through the steam pipe (27), and are located downstream of the first steam supply valve (24) of the first steam pipe (22) (22b). Downstream from exhaust valve (25) (23
b) is communicated through a fourth steam pipe (29) provided with a second steam discharge valve (28).

Next, the procedure for processing wood in the apparatus of the present invention configured as described above will be described.

First, wood (W) to be processed is supplied into the processing vessel (11), and the wood (W) is placed in a state where both sides thereof are brought into close contact with a pair of steam heads (20) and (21). It is clamped between a pair of press dies (16) and (17).

Subsequently, the exhaust valve (12) is opened, and the air inside the processing vessel (11) is exhausted to the atmosphere through the exhaust pipe (13) by the negative pressure generated by the ejector, and the inside of the processing vessel (11) is opened. Is evacuated to a vacuum.

After the inside of the processing vessel (11) is evacuated as described above, the first steam supply valve (24) and the first steam discharge valve (25) are opened, and the high-temperature and high-pressure steam from the steam supply device is opened. Through a first steam pipe (22), one steam head (20), wood (W), the other steam head (21), and a second steam pipe (23) in sequence with a pressure difference from the atmosphere. To be discharged. Thereby, high-temperature and high-pressure steam flows inside the wood (W) from one steam head (20) to the other steam head (21), and the wood (W) is heated by the high-temperature and high-pressure steam.

When the wood (W) is heated for a predetermined period of time by the high-temperature and high-pressure steam flowing from one steam head (20) to the other steam head (21), the wood (W) becomes first.
Steam supply valve (24) and first steam discharge valve (25)
Is closed, and the second steam supply valve (26) and the second steam discharge valve (28) are opened, and the high-temperature and high-pressure steam from the steam supply device is supplied to the first steam pipe (2
2) upstream (22a), third steam pipe (27), second
Upstream (23a) of the steam pipe (23), the other steam head (21), wood (W), one steam head (20),
The downstream side (22b) of the first steam pipe (22), the downstream side (23) of the fourth steam pipe (29) and the second steam pipe (23).
b) is sequentially discharged to the atmosphere. Accordingly, high-temperature and high-pressure steam flows inside the wood (W) from the other steam head (21) to one steam head (20), and the wood (W) is heated by the high-temperature and high-pressure steam. As described above, when the wood (W) is heated by high-temperature and high-pressure steam alternately flowing through the inside of the wood (W), the wood (W) is rapidly and uniformly heated and softened.

When the wood (W) is softened by heating as described above, one press die (16) is lowered by the press cylinder (18) so as to approach the other press die (17), and the wood (W) is lowered. ) Is applied with a mechanical compression force to compress the wood (W) to a predetermined cross-sectional area ratio and at the same time to form the wood (W) into an arbitrary shape. Thereafter, the wood (W) is left in the compressed state for a predetermined time, and the compression molding of the wood (W) is fixed.

When the wood (W) is compressed and fixed, the one press mold (16) is lifted by the press cylinder (18) so as to separate from the other press mold (17). Thereafter, the wood (W) is taken out of the processing container (11) to complete the processing.

According to the apparatus of the present invention, since high-temperature and high-pressure steam is forcibly flowed into the wood (W) and the wood (W) is heated by the steam, the wood (W) is quickly heated and softened. The processing time can be greatly reduced, and high-temperature and high-pressure steam is alternately flown from both sides of the wood (W). The product is obtained.

In the above embodiment, the steam from the steam supply device flows due to the pressure difference from the atmosphere. However, an ejector is provided downstream (23a) of the second steam pipe (23) and generated by the ejector. It may be made to suck and flow by the applied negative pressure. Although high-temperature and high-pressure steam is alternately flown from both sides of the wood (W), the first steam supply valve (24) and the second steam supply valve (26) are opened, and the first steam discharge valve ( 25) and by closing the second steam discharge valve (28), a pair of steam heads (20) (21)
And a steam supply device, respectively, and steam may be simultaneously supplied from the pair of steam heads (20) and (21) so that steam is allowed to flow simultaneously from both sides of the wood (W). W) may be flown only from one side, or may be flown from both sides of the wood (W) several times, instead of being flown from both sides of the wood (W) only once.

[0026]

As described above, according to the present invention,
When heating and softening wood with high-temperature and high-pressure steam, steam is flowed inside the wood for heating, so the wood can be quickly heated and softened, and the processing time can be greatly reduced. Further, since high-temperature and high-pressure steam is alternately flown from both sides of the wood for heating, the wood can be heated uniformly, and a high-quality product can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a wood processing apparatus according to the present invention.

FIG. 2 is a schematic configuration diagram showing a conventional wood processing apparatus.

[Explanation of symbols]

 W Wood 11 Processing vessel 16 Press mold 17 Press mold 18 Press cylinder 20 Steam head 21 Steam head 22 First steam pipe 23 Second steam pipe 24 First steam supply valve 25 First steam discharge valve 26 Second steam supply valve 27 Third steam pipe 28 Second steam discharge valve 29 Fourth steam pipe

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B27K 5/00 B27K 5/06 B27N 3/00-3/28

Claims (3)

(57) [Claims] To 1. A high-temperature high-pressure processing chamber, a pair of press dies having opposing surfaces in accordance with the compression molding shape timber disposed opposite, pressurized by steam by the pair of press dies
Compression molding of heat-softened wood and its change by compression molding
Wood treatment equipment that fixes the shape with steam
A pair of steam heads on both sides of the pair of press dies ,
Steam supply means for disposing one side of the pair of steam heads to supply high-temperature , high-pressure steam, which is disposed so as to be in close contact with both side surfaces of the wood to be compression-molded by the pair of press dies;
And connected to the atmosphere opening or suction means, and the other
The above-mentioned atmosphere opening or suction means and the above-mentioned steam supply
A wood processing apparatus characterized by being connected to a means . Wherein connecting said pair of steam head alternately to the steam supply means and the air release portion or suction means
Then, steam is exchanged from the pair of steam heads to the wood.
The wood processing apparatus according to claim 1, wherein the wood is supplied to each other . The method according to claim 3, wherein said pair of water vapor head connected to the steam supply means, from the pair of steam head
2. The wood processing apparatus according to claim 1 , wherein steam is supplied to said wood simultaneously .