JP2943020B2 - Chemical impregnation equipment for wood - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical liquid impregnating apparatus for wood for impregnating chemicals such as insect repellents, preservatives, bleaching agents and dyes into wood.

[0002]

2. Description of the Related Art Wood is a building material that is light and highly heat-insulating because it contains air in its fibers. However, this wood also has drawbacks such as rot due to moisture and becoming a prey for termites.

[0003] In recent years, it has been attempted to solve the above-mentioned drawbacks by applying various chemicals such as insect repellents and preservatives to the wood. However, in the application of the chemical, only the chemical was impregnated on the wood surface and below the surface, and a permanent effect was not obtained.

Therefore, a method of impregnating the inside of wood with a chemical solution has been used. At present, this insect repellent and preservative and a chemical solution for bleaching, dyeing, and WPC (Wood Plastic Combination) are penetrated into the wood. The impregnation method is performed by holding wood in a chemical solution under pressure and infiltrating for a long time.

FIG. 3 is an explanatory view showing the structure of a conventional chemical liquid impregnating apparatus. As shown in the figure, the wood (1) is held inside the impregnation tank (2), sealed and driven by the vacuum pump (5).
(2) Depressurize the inside to eliminate the air inside the wood (1), and then introduce the chemical (4) from the chemical tank (3), and
(2) is pressurized by a pressurizing device (6) to perform impregnation with a chemical solution.

[0006]

However, as described above, wood contains air in the fiber, and especially in the case of a long object, the wood may contain moisture, air, etc. up to the center part. Infiltration was difficult, longer holding time was required, and there was unevenness.

An object of the present invention is to provide a chemical liquid impregnating apparatus for wood which can impregnate a chemical liquid into wood in a short time without unevenness.

[0008]

According to a first aspect of the present invention, there is provided an apparatus for impregnating a chemical solution for wood according to the present invention, wherein a chemical solution tank for holding wood and a chemical solution is provided. Communication means for communicating one end of the wood opening of the wood held at the outside to the outside of the chemical tank, and differential pressure generating means for holding the chemical in the chemical tank at a pressure relatively higher than the pressure outside the chemical tank It is provided with.

In the chemical liquid impregnating device for wood according to the second aspect of the present invention, the differential pressure generating means includes a pressurizing device for sealingly pressurizing the inside of the chemical liquid tank.

In the chemical liquid impregnating device for wood according to the third aspect of the present invention, the differential pressure generating means includes a vacuum pump attached to the communication means.

Further, in the chemical liquid impregnating device for wood according to the present invention, the differential pressure generating means is a pressure device for sealingly pressurizing the inside of the chemical tank and a vacuum pump attached to the communication means. Are included.

[0012]

According to the present invention, conduits, sieve tubes and their dead thin tubes communicate with each other along the formation layer (rings) from one end of the wood to the other.

In the present invention, there is provided a chemical solution tank for holding wood and a chemical solution, communication means for communicating one end of the wood opening of the wood held in the chemical solution to the outside of the chemical solution tank, and Pressure generating means for holding the chemical liquid at a pressure relatively higher than the pressure outside the chemical liquid tank, so that a conduit and a sieve communicating from the other end of the wood to the other end of the wood The chemical solution impregnates through the pipes and the thin pipes that have died, and even if there is a crack in the middle of the wood, the chemical solution will also penetrate through the crack, and the chemical solution will be evenly distributed over the entire wood in a short time. Can be injected.

The differential pressure generating means may pressurize the inside of the chemical solution tank, may depressurize and suction one end of the mouth from the outside of the chemical solution tank, or may perform both simultaneously.

[0015]

FIG. 1 is an explanatory view of a chemical liquid impregnating apparatus for wood showing an embodiment of the present invention, and FIG. 2 is an enlarged view of a main part of FIG.

In the figure, the impregnation (12) has an opening (1) at one end.
8), and at the outer peripheral edge of the opening (18), the outer edge of the wood end of the wood (11) is set in close contact with the entire circumference via a seal plate (17).

The opening (18) is air-tightly covered with a lid (23), and the inside of the lid (23) is provided with valves (19), (20) and (21) through a vacuum pump (22) and a chemical solution receiving tank. (24). Further, a chemical solution supply tank (13), another vacuum pump (15), and a pressurizing device (16) are connected to the impregnation tank (12) via valves. In addition, (25) and (26) are pressure gauges.

Wood was actually impregnated using the above apparatus. First, after setting the cedar wood (11) having a small edge of 12 cm square and a length of 200 cm in the impregnation tank (12) as described above, the vacuum pump (22) is driven to suck the wood from the wood end. (Valve (19) (20) open, Valve (21) closed), Decompression degree 5mmHg
For 1 hour to remove air and the like inside the wood (11).

Thereafter, 15 parts of methyl methacrylate, 5 parts of styrene, and 0.2 parts of benzoyl peroxide were added to 100 parts of methanol from the chemical solution supply tank (13) while the inside of the impregnation tank (12) was suctioned under reduced pressure by a vacuum pump (15). After filling the impregnating solution (14) of the dissolved acrylic resin solution in the impregnating bath (12), the pressurizing device (16) is driven to pressurize the chemical solution in the impregnating bath (12),
The impregnation was performed at room temperature under a pressure of 5 kg / cm ² .

Thereafter, the pressure in the impregnation tank (12) and the reduced pressure in the lid (23) were maintained until the chemical solution came out of the lid (23) covering the opening (18). When the chemical solution came out in the lid (18), the vacuum pump (22) was stopped, the valve (20) was closed, the valve (21) was opened, and then disposed in the impregnation tank (12) and the lid (23). While monitoring the two pressure gauges (25) and (26), a predetermined pressure was maintained and the impregnation was performed for 3 hours. During this time, the chemical coming out of the lid (23)
(19) It is collected in the chemical solution receiving tank (24) through (21). After a predetermined time has elapsed, the pressurizing device (16) is stopped, and the impregnation tank is stopped.
Wood (11) was taken out of the chemical solution in (12).

If necessary, a drain pipe may be provided in the impregnation tank (12) in order to recover the chemical solution from the inside of the impregnation tank (12). As described above, a cedar material in which the interior of the wood was impregnated with the acrylic resin was obtained.

Another embodiment will be described. A cedar material (11) having a small edge of 12 cm square and a length of 200 cm is attached to the impregnation tank (12) in the impregnation layer (12), and then vacuum suction is performed by the vacuum pump (22). Left for hours. Next, after filling the impregnation tank with a 2% aqueous solution of CCA No. 2 (preservative, JIS K1554-1975), the valves (19), (20) and (21) were opened and pressurized at 3 kg / cm ² and depressurized at 100 mmHg. Simultaneously, the impregnation treatment was performed at room temperature for 3 hours. Next, after collecting the chemical solution in the impregnation tank, the treated wood was taken out, and cedar wood impregnated with the preservative inside the wood was obtained.

The wood used in this embodiment has an opening (1).
By selecting the shape of 8) and the seal plate (17), it is possible to use square or cylindrical material, as long as it has a tissue structure in which a thin tube communicates not only from wood but also from one end to the other. As in the case of wood, by increasing the pressure at one end relative to the pressure at the other end and injecting a chemical such as an antibacterial agent into the inside, the chemical can be injected without unevenness in a short time.

[0024]

As described above, the present invention provides a chemical tank for holding wood and a chemical solution, and a communication means for communicating one end of the wood opening of the wood held in the chemical liquid to the outside of the chemical tank. And a differential pressure generating means for holding the chemical in the chemical tank at a pressure relatively higher than the pressure outside the chemical tank, so that the other end of the wood to one end of the wood is provided. The chemical impregnates through the communicating conduits, sieve pipes and their dead thin tubes, and even if there is a crack in the middle of the wood, the chemical will also penetrate through the crack, and the whole wood will be evenly distributed. Can be injected in a short time, for example, in the case of dyeing wood of square timber or cylinder,
After the treatment, there is an effect that industrial merits such as being able to prepare a veneer by slicing and durability due to the internal penetration of the drug injection are immeasurable.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a chemical liquid impregnating device for wood, showing a configuration of one embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an explanatory view showing a configuration of a conventional chemical liquid impregnating apparatus.

[Explanation of symbols]

(1), (11) ... wood, (2), (12) ... impregnation tank, (3), (13) ...
Chemical solution tank, (4), (14)… Chemical solution, (5), (15), (22)… Vacuum pump, (6), (16)… Pressurizing device, (17)… Seal plate, (1)
8) ... opening, (19), (20), (21) ... valve, (23) ... lid, (2
4)… Chemical liquid receiving tank, (25), (26)… Pressure gauge

Claims (4)

(57) [Claims] 1. An apparatus for impregnating wood with a chemical solution, comprising: a chemical solution tank holding wood and a chemical solution; and a communication port for connecting one end of a wooden mouth of the wood held in the chemical solution to the outside of the chemical solution tank. Means for holding a chemical solution in the chemical solution tank at a pressure relatively higher than the pressure outside the chemical solution tank. 2. The chemical liquid impregnating apparatus for wood according to claim 1, wherein said differential pressure generating means includes a pressurizing device for sealingly pressurizing the inside of said chemical liquid tank. 3. The apparatus for impregnating a chemical solution for wood according to claim 1, wherein said differential pressure generating means includes a vacuum pump attached to said communication means. 4. The wood according to claim 1, wherein the differential pressure generating means includes both a pressurizing device for sealingly pressurizing the inside of the chemical solution tank and a vacuum pump attached to the communicating means. Chemical liquid impregnation equipment.