JP2003025309A - Manufacturing system for wooden formed body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing system for a wooden formed body capable of decreasing a manufacturing cost of the wooden formed body by omitting a pressure vessel. SOLUTION: A wooden material of a powder state and the like which was treated by steam at a high temperature and a high pressure, is formed in a specific mat state on a forming conveyor 111 with a forming machine 12. The wooden material formed in the mat state is conveyed on the forming conveyor 111 and compression formed and solidified on the conveyor 111 with a high frequency press machine 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood molding manufacturing system for manufacturing a wood molding from a powdery, small piece or fibrous wood material.

[0002]

2. Description of the Related Art The following is known as a woody molded product manufactured by molding a woody material such as powder into a predetermined shape. For example, in Japanese Unexamined Patent Publication No. 10-166323, a wood material produced by softening a wood raw material such as wood powder, and then compressing the wood raw material at a predetermined compression rate and immobilizing the wood raw material with high-pressure steam. The board is disclosed. Further, JP-A-6-91611 and JP-A-7-47511 disclose a consolidated wood material manufactured by high-frequency heating of wood material in a pressure resistant container.

[0003]

SUMMARY OF THE INVENTION However, Japanese Patent Laid-Open No. Hei 10
In the wooden board described in Japanese Patent Publication No. 166323, softening /
Since the steps of compression / fixation are performed in one pressure vessel, there is a drawback that the device becomes large-scale and the manufacturing cost increases. Further, even the consolidated wood materials described in JP-A-6-91611 and JP-A-7-47511 have a drawback that a pressure container is required for the production thereof, resulting in an increase in cost.

The present invention has been made by paying attention to the problems existing in the prior art as described above. It is an object of the present invention to provide a manufacturing system for a wood molding that can omit the pressure resistant container and reduce the manufacturing cost of the wood molding.

[0005]

In order to achieve the above object, the present invention according to claim 1 provides a powdery, piece-like or fibrous woody material treated with steam at high temperature and high pressure in a predetermined manner. Forming means for forming into a shape, a carrier for carrying the wood material formed into the predetermined shape in a predetermined direction, and disposed in the middle of the carrier,
A compression molding means for compression molding a wood material formed into the predetermined shape, and disposed in the middle of the carrier,
The gist of the present invention is to provide an immobilizing means for immobilizing the shape of the compression-molded wood material by high frequency dielectric heating.

According to a second aspect of the present invention, in the system for producing a wood-based molded body according to the first aspect, the compression molding means and the fixing means are the same as the wood-based material carried by the carrier. The gist is that it is configured to be compression molded and fixed in the above.

According to a third aspect of the present invention, in the system for producing a wood molding according to the first or second aspect, the forming means forms the wood material into a predetermined shape on the carrier. The summary is that it is configured as described above.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram schematically showing an outline of a manufacturing system for manufacturing a board-shaped molded wood product from a wood material. The woody material used here is in the form of powder, pieces or fibers obtained by crushing thinned wood, pruned branches, driftwood, etc., and at high temperature (for example 180 to 230 ° C) and high pressure. It has been previously treated with water vapor.

The manufacturing system for a wood molding shown in FIG.
It is provided with a carrier 11 that conveys a wood material in a predetermined direction while being processed into a wood compact. Carrier 1
1 is a forming conveyor 111 and a transfer conveyor 11
2. Cross conveyor 113 and take-out conveyor 114
It consists of These conveyors 111-114
Are arranged in the above order from the upstream side along the transport direction of the transport body 11. Of these, the forming conveyor 111 is configured by a plurality of glass cloths coated with a fluororesin laid at predetermined intervals between a pair of endless chains movably supported. The glass cloth coated with the fluororesin supports the transported object from below.

The manufacturing system for a wood molded body comprises a forming machine 12, a high frequency press machine 13, a width cut saw 14, a length cut saw 15, and a stacker, which are sequentially arranged from the upstream side along the conveying direction of the convey body 11. Device 1
6 is provided.

As shown in FIG. 2, the forming machine 12 includes a former bin 121, a doffing roller 122, a bottom conveyor 123, and a leveling conveyor 124.
Is equipped with. The former bin 121 can temporarily store the wood material. The doffing roller 122 is capable of scraping the wooden material stored in the former bin 121 out of the forming machine 12. The bottom conveyor 123 is the former bin 12
The wood material stored in 1 can be conveyed toward the doffing roller 122. Leveling conveyor 12
In No. 4, the mountain head of the wood material stored in the former bin 121 can be contacted and the mountain head can be leveled. And the forming machine 12 is
The wooden material scraped out by the doffing roller 122 is arranged on the forming conveyor 111 so as to be scattered on the starting end portion of the forming conveyor 111 (that is, the starting end portion of the carrier 11).

Further, as shown in FIG. 1, a dryer 20 is connected to the forming machine 12 via a first screw conveyor 17, a bucket conveyor 18 and a second screw conveyor 19. The dryer 20 is capable of drying the woody material treated with the steam at high temperature and high pressure to a predetermined moisture content (for example, about 5%). The first screw conveyor 17, the bucket conveyor 18, and the second screw conveyor 19 can convey the wood material from the dryer 20 to the forming machine 12. Second
A traverser 21 is provided at the downstream end of the screw conveyor 19 in the transport direction. The wood material that has passed through the first screw conveyor 17, the bucket conveyor 18, and the second screw conveyor 19 from the dryer 20 is once conveyed to the traverser 21, and then supplied from the traverser 21 to the forming machine 12. The traverser 21 moves the wood material horizontally while moving the forming machine 12
It can be sprayed in the former bin 121. The forming machine 12 is a forming means for forming the wood material into a predetermined shape.

As shown in FIG. 2, the high-frequency pressing device 13 has a lower surface plate 131 and an upper surface plate 132 which are vertically opposed to each other with the forming conveyor 111 interposed therebetween. Lower surface plate 131 is a fixed type, while upper surface plate 1
Reference numeral 32 is a movable type that moves up and down by a hydraulic cylinder 133. The upper surface plate 132 has a heat-resistant insulating member 1
An electrode board 135 is connected via 34. Electrode board 1
35 is connected to a high frequency oscillator (not shown)
It is designed to generate a high frequency AC electric field of 0 MHz.
Further, the lower surface plate 131 and the electrode plate 135 are connected to a pipe (not shown) through which a heat medium (oil or steam) flows and are heated by the heat medium supplied from the pipe. The high-frequency pressing device 13 integrally includes compression molding means for compressing and molding a wood material formed into a predetermined shape and immobilizing means for fixing the shape of the compression-molded wood material. .

As shown in FIG. 1, the width cut-and-sew 14 is arranged in the middle of the conveyor 112. The width cut-and-sew 14 has four cutting blades 14a extending along the transport direction of the transport conveyor 112. These cutting blades 14a are provided at equal intervals along the direction orthogonal to the transport direction of the transport conveyor 112. Then, the width cutsaw 14 cuts off both sides of the wooden molded body transported on the transport conveyor 112 in the direction orthogonal to the transport direction, and also enables the wooden molded body to be equally divided into three in the direction also orthogonal to the transport direction. Has become.

The length cut-and-sewn 15 is arranged in the middle of the cross conveyor 113. Length cut and sewn 15
Has three cutting blades 15a extending along the conveyance direction of the cross conveyor 113. These cutting blades 15a are
The cross conveyors 113 are provided at equal intervals along the direction orthogonal to the transport direction of the cross conveyor 113. The length cutsaw 15 cuts off both sides in the direction orthogonal to the transport direction of the wooden compact conveyed on the cross conveyor 113, and also allows the wooden compact to be equally divided into two in the direction orthogonal to the transport direction. It has become.

The loading device 16 is arranged at the end of the take-out conveyor 114 (that is, the end of the carrier 11). The pick-up device 16 includes the take-out conveyor 11
The wooden molded body conveyed to the end portion of No. 4 can be delivered to the stretch wrapping machine 22 arranged near the stacking device 16.

Next, the operation of the system for manufacturing a wood molded body having the above-described structure will be described. As shown in FIG.
In the above-mentioned wood molded product manufacturing system, the wood molded product is
It is formed by drying (S2) a wood material treated with high-temperature and high-pressure steam (S1), forming it into a predetermined shape (S3), and then compression-molding (S4) and further fixing (S5). The wood molded body thus obtained is subsequently cut (S6) and then stretch-wrapped (S7).

More specifically, referring to FIGS. 1 and 2, first, the wood material treated with steam at high temperature and high pressure is dried by the dryer 20 to a predetermined water content (for example, about 5%), and then, After being conveyed to the traverser 21 via the first screw conveyor 17, the bucket conveyor 18, and the second screw conveyor 19, it is supplied to the forming machine 12.

The woody material conveyed to the forming machine 12 and temporarily stored in the former bin 121 is scraped out by the doffing roller 122 at a constant speed at predetermined time intervals, and the starting end of the forming conveyor 111 flowing at a constant speed. Sprayed on the section. As a result, the wood material is continuously formed on the forming conveyor 111 in a mat shape having a predetermined width and a predetermined length (for example, 1000 mm × 2000 mm) and a constant thickness.

The wood material thus formed into a mat shape is conveyed on the forming conveyor 111 toward the end, and is pressed between the lower surface plate 131 and the electrode plate 135 of the high frequency press device 13 on the conveyor 111. Compression molded. At the same time, the wood material is subjected to high-frequency dielectric heating by a high-frequency alternating electric field applied from the electrode board 135, and is externally heated by heat conduction from the lower surface plate 131 and the electrode board 135 heated by the heat medium. Therefore, the wood-based material is fixed by high-frequency dielectric heating and external heating at the same time as the compression molding to obtain a wood-shaped molded body. The pressing pressure during compression molding is preferably 0.5 to 5 MPa. Further, the high-frequency output during immobilization is preferably 0.5 to 8 kW per kg of the wood material. Furthermore, when immobilizing wood material 180-230
It is preferable to heat to ° C.

The wood molding obtained as described above is
After the transfer from the forming conveyor 111 to the transfer conveyor 112, the width cutting saw 14 is cut off on both sides in the width direction and is equally divided into three in the width direction. Further, the wooden molded body is a conveyor 112.
To the cross conveyor 113, the length cutsaw 15 is cut off on both sides in the length direction, and is equally divided into two in the length direction. The wood molded body cut into six pieces in this way is taken out from the conveyor 114.
Is transferred to the stretch wrapping machine 22 by the pick-up device 16 and stretch-wrapped.

The effects obtained by this embodiment will be described below. In the present embodiment, since a pressure resistant container is not required at the time of compression molding and immobilization of the wood-based material, JP-A-10-166 is used.
As compared with the conventional systems disclosed in Japanese Patent Laid-Open No. 323, Japanese Patent Laid-Open No. 6-91611 and Japanese Patent Laid-Open No. 7-47511, it is possible to simplify the device and reduce the manufacturing cost of the wood molding. it can. By the way, it is considered that the reason why the immobilization can be sufficiently achieved without using a pressure resistant container at the time of compression molding and immobilization is that the raw material is a wood material treated with high temperature and high pressure steam. It is known that when wood materials are treated with steam at high temperature and high pressure, some of the components contained in the wood materials change to adhesive components, and the action of these adhesive components ensures sufficient immobilization even in an open system. It is presumed that this can be achieved.

In the present embodiment, the matt-formed wood material conveyed by the forming conveyor 111 is compression-molded and fixed by the high-frequency pressing device 13 on the forming conveyor 111 as it is. Therefore, there is no need to once move the woody material flowing on the line to the device for compression molding and fixation, compress and fix it, and then return it to the line again, so that the woody molded body can be efficiently manufactured. can do.

In the present embodiment, the wood-based material is formed into a mat-like shape on the forming conveyor 111 when being transferred from the forming machine 12 to the forming conveyor 111. Therefore, the steps from forming to compression molding and fixing in the manufacturing process of the wood molded body can be continuously performed on the forming conveyor 111, and the manufacturing efficiency can be improved.

According to the wood molded product manufacturing system of the present embodiment, a series of manufacturing steps from the step of drying the wood material treated with the high-temperature and high-pressure steam to the stretch-wrapping of the wood molded product are continuously performed. Can be done.

The stress that originally tries to recover from the compressed state remains inside the wooden molded body manufactured from the wooden material. For this reason, some recovery tends to occur when exposed to moisture or heat. However, according to the manufacturing system for a wood molded product of the present embodiment, it is possible to obtain a wood molded product that is difficult to recover from the compressed state. It is speculated that this is due to the fact that not only external heating but also high-frequency dielectric heating is used at the time of immobilization. In case of high frequency induction heating,
The compression-molded wood material can be uniformly heated regardless of the surface or the inside.

Since it is possible to manufacture a wood molding from only a wood material without using an adhesive, a VOC (volatile organic compound) typified by formaldehyde, which is a wood molding containing an adhesive, can be manufactured. )Problem of,
There is no problem of harmful gas generated when incinerated, and no problem of environmental load when discarded.

In the present embodiment, the wood-based material is formed into a mat-like shape by being sprayed from the forming machine 12 onto the forming conveyor 111, and no formwork is required for forming. Therefore, by omitting the forming mold, it is possible to further reduce the manufacturing cost of the wooden molded body.

The above embodiment may be modified as follows. The front end and the rear end (both ends of the mat-shaped wood material in the length direction) of the mat-formed wood material in the transport direction of the forming conveyor 111 may be further arranged as follows.

That is, as shown in FIG. 4, the flap 23 supported by the rotary shaft 23a is disposed in the middle of the forming conveyor 111 (upstream of the high-frequency pressing device 13). Then, first, the wood material formed into a mat shape (hereinafter, mat 24) flowing along the regular conveying direction (right direction in FIG. 4) on the forming conveyor 111.
Say. ) Is abutted against the flap 23 in the normal position (suspended state) so that the front end of the mat 24 is substantially perpendicular to the upper surface of the forming conveyor 111 (FIG. 4).
(A), (b)). When the front end of the mat 24 becomes substantially vertical, the flap 23 is rotated around the rotation shaft 23a to the avoidance position so that the mat 24 passes under the flap 23 (FIG. 4 (c)). When the mat 24 has completely passed under the flap 23, return the flap 23 to the normal position (see FIG. 4).
(D)) After that, the mat 24 is flowed in the direction opposite to the regular conveying direction (left direction in FIG. 4), this time the rear end of the mat 24 is abutted against the flap, and the rear end of the mat 24 is formed. It is substantially perpendicular to the upper surface of 111 (see FIG. 4).
(E)). After that, the mat 2 is moved along the regular transport direction.
4 is supplied to the high frequency press device 13 (FIG. 4 (f)). According to this structure, the product can be used as it is without cutting off the front end and the rear end.

In the above-mentioned embodiment, the wood material is formed into a mat of a predetermined length for compression molding and fixation, but the mat is formed into a continuous mat,
You may make it cut | disconnect to predetermined length after compression molding and fixation. That is, in the above-described embodiment, the wood material that is intermittently conveyed by the forming conveyor 111 is compression-molded and fixed, but the wood material that is continuously conveyed may be compression-molded and fixed. .

In the forming conveyor 111, the member which is supported between the endless chains and supports the object to be conveyed from below is not limited to the glass cloth coated with fluororesin, and has heat insulation and insulation properties. Any one may be used.

The forming conveyor 111 of the above embodiment may be composed of an endless belt conveyor, a roller conveyor, a carriage, or the like. However, also in this case, it is preferable that the member that directly contacts and supports the transported object has heat resistance and insulating properties.

Next, the technical idea which can be understood from the above embodiment will be described below. (1) The forming means is constituted by a forming machine that sprays the wood-based material on a carrier to form a predetermined shape and supply the formed material.
4. The manufacturing system for a wood molding according to claim 3. According to this structure, it is possible to further reduce the manufacturing cost of the wooden molded body by omitting the forming frame.

(2) A wood molding manufactured by using the wood molding manufacturing system according to any one of claims 1 to 3 and (1). (3) The wood molding according to (2) above, which is essentially made of only wood material.

[0036]

Since the present invention is constructed as described above, it has the following effects. According to the invention as set forth in claim 1, the pressure-resistant container can be omitted to reduce the manufacturing cost of the wooden molded body.

According to the invention of claim 2, claim 1
In addition to the effects of the invention described in (1), a wood molding can be efficiently manufactured. According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, it is possible to further improve the manufacturing efficiency.

[Brief description of drawings]

FIG. 1 is a schematic plan view schematically showing a manufacturing system for a wooden molded body.

FIG. 2 is a schematic side view schematically showing a part of a system for manufacturing a wood molding.

FIG. 3 is a flowchart showing a manufacturing process of a wood molded body.

FIG. 4 is a side view showing a step of arranging the front end and the rear end of the mat in the carrying direction.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Conveyance body, 111 ... Forming conveyor which comprises a conveyance body, 12 ... The forming machine which comprises a forming means, 13 ... The high frequency press apparatus which comprises a compression molding means and a fixing means.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Makoto Nishigaki             Gifu Prefecture Gifu City Honjo Kumano-mae 1941 No. 1             Sen Co., Ltd. (72) Inventor Katsuhide Hayashi             Gifu Prefecture Gifu City Honjo Kumano-mae 1941 No. 1             Sen Co., Ltd. (72) Inventor Junichi Kodama             Yamamoto 6-3-12 Kamishio, Tennoji-ku, Osaka             Vinita Co., Ltd. (72) Inventor Shoji Tatsumi             Yamamoto 6-3-12 Kamishio, Tennoji-ku, Osaka             Vinita Co., Ltd. (72) Inventor Taiji Yamamoto             Yamamoto 6-3-12 Kamishio, Tennoji-ku, Osaka             Vinita Co., Ltd. F-term (reference) 2B260 AA12 BA02 BA18 BA19 EA01                       EA03 EA11 EB02 EB06 EB08

Claims (3)

[Claims] 1. Forming means for forming a powdery, piece-shaped or fibrous woody material treated with steam at high temperature and high pressure into a predetermined shape, and a woody material formed into the predetermined shape in a predetermined direction. And a compression molding means for compressing and molding the wood material that has been formed into the predetermined shape, and a compression body that is disposed in the middle of the conveyance body. A method for manufacturing a wood molded body, comprising: a fixing means for fixing the shape of the molded wood material by high-frequency dielectric heating. 2. The compression molding means and the immobilization means are configured such that the wood material carried by the carrier is compression molded and fixed on the carrier. The manufacturing system for a wood molded product according to item 1. 3. The method for producing a wood molding according to claim 1, wherein the forming means is configured such that the wood material is formed into a predetermined shape on the carrier. system.