JP3974316B2 - Method for producing a wooden molded body - Google Patents
Method for producing a wooden molded body Download PDFInfo
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- JP3974316B2 JP3974316B2 JP2000230315A JP2000230315A JP3974316B2 JP 3974316 B2 JP3974316 B2 JP 3974316B2 JP 2000230315 A JP2000230315 A JP 2000230315A JP 2000230315 A JP2000230315 A JP 2000230315A JP 3974316 B2 JP3974316 B2 JP 3974316B2
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- thermoplastic resin
- cylinder
- wood material
- resin melt
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/78—Recycling of wood or furniture waste
Description
【０００１】
【発明の属する技術分野】
本発明は建築板に使用される木質成形体およびその製造方法に関するものである。
【０００２】
【従来の技術】
例えば従来のハードボード等の木質成形体にあっては、木質材料にバインダーとしてフェノール樹脂、尿素樹脂、メラミン樹脂等の熱硬化性樹脂を添加してホットプレスすることによって製造される。
上記バインダーとして熱可塑性樹脂が使用されると、該熱可塑性樹脂としてリサイクル品が使用出来るし、また該熱可塑性樹脂をバインダーとして使用した木質成形体の廃品もチップにしてリサイクルし易くなる。
【０００３】
【発明が解決しようとする課題】
しかしながら上記従来の製造方法にあって、熱可塑性樹脂をバインダーとして使用して木質成形体を製造する場合には、ホットプレスの後更にコールドプレスをする必要があり、工程が多く手間がかゝるし、またプレス装置が二つ必要となり設備費が高くなる。
【０００４】
【課題を解決するための手段】
本発明は上記従来の課題を解決するための手段として、押出成形機(1) のシリンダ(2) 根端部に取付けられているホッパー(3) からシリンダ(2)内に木質材料Ｔを投入し、該シリンダ(2) に内設されているスクリュー(4) を回転させて該木質材料Ｔをシリンダ(2) 先端側に送り、該シリンダ(2) の中間部において熱可塑性樹脂溶融発泡物Ｒを該木質材料Ｔに添加混合し、該シリンダ(2) 先端のダイ(18)から該木質材料Ｔと熱可塑性樹脂溶融発泡物Ｒとの混合物Ａを板状に押出し、圧延ロール(19,20) で圧延した後該板状成形物Ｍを挟持冷却手段(21)によって冷却する木質成形体の製造方法を提供するものである。該押出成形機(1) のシリンダ(2) 中間部の熱可塑性樹脂溶融発泡物Ｒ添加混合部において、シリンダ(2) 外周にはジャケット(6) を周設し、該ジャケット(6) には加熱手段(6A)を内挿して該木質材料Ｔと該熱可塑性樹脂溶融発泡物Ｒとを加熱することが望ましく、また該熱可塑性樹脂溶融発泡物Ｒは熱可塑性樹脂溶融物がシリンダ(2) 内に添加される前に圧搾空気を吹込んでホイップすることによって形成されることが望ましい。
また更に本発明は木質材料Ｔと熱可塑性樹脂溶融発泡物Ｒとの混合物Ａを型板上に散布してマットをフォーミングし、該マットをプレスして成形する木質成形体の製造方法を提供するものである。該型板はロールコンベア上を移動し、該型板上にフォーミングされたマットは熱間ロールプレスされ、その後冷間ロールプレスされることが望ましい。
【０００５】
【発明の実施の形態】
〔木質材料〕
本発明において使用される木質材料とは、例えば木片、ストランド、木粉、木毛、木質繊維束、木質パルプ等、あるいは木造建築物を構築あるいは解体するときに発生する端切れや廃材等の粉砕物であり、特に幅１〜５mm、長さ５〜２０mm、厚み０．２〜２mmの木片が望ましい。
また、上記木質材料が水分を多量含んでいると、加熱の際木片から水蒸気が発生し、木質材料と熱可塑性樹脂溶融発泡物との間に水蒸気膜が形成され、木質材料と熱可塑性樹脂溶融発泡物との密着が不充分になるため、通常木質材料は原料を細分化した後にドライヤーにて木質材料の含水率を５％未満に乾燥しておく。
【０００６】
〔熱可塑性樹脂〕
本発明において使用される熱可塑性樹脂としては、主としてポリエチレン、ポリプロピレン等のポリオレフィン系樹脂が使用されるが、ポリスチレン、ポリメタクリレート、ポリアミド、ポリエステル、ポリ酢酸ビニル、アクリル樹脂、アクリロニトリル−ブタジェン共重合体、スチレン−ブタジェン共重合体、アクリロニトリル−ブタジェン−スチレン共重合体等の熱可塑性樹脂でもよい。
上記熱可塑性樹脂は二種以上混合使用されてもよく、また上記熱可塑性樹脂の廃材の再生品であってもよい。
【０００７】
〔熱可塑性樹脂溶融発泡物〕
熱可塑性樹脂溶融発泡物は、上記熱可塑性樹脂の溶融物を発泡室において圧搾空気を吹込みホイップすることによって形成される。この場合該熱可塑性樹脂溶融物は攪拌機によって攪拌されてもよい。
【０００８】
〔配合〕
木質材料と熱可塑性樹脂との混合重量比は通常５０：５０〜８０：２０程度とする。しかし該熱可塑性樹脂は溶融してから発泡されているので、木質材料と熱可塑性樹脂との混合重量比が８０：２０であっても、発泡後のかさは圧倒的に熱可塑性樹脂溶融発泡物の方が大きい。
本発明の木質成形体には、木質材料と熱可塑性樹脂の他にゴムやエラストマー等の耐衝撃性改良材、シリコン、ワックス、パラフィン等の撥水剤等が添加されてもよい。
【０００９】
〔木質成形体の製造方法〕
本発明を図１および図２に示す一実施例によって説明すれば、押出機(1) のシリンダ(2) 内根端部にはホッパー(3) から木質材料Ｔが投入され、該木質材料Ｔは該シリンダ(2) に内設されモーター(5) によって駆動回転されているスクリュー(4) によって図１矢印イに示すシリンダ(2) 先端側に送られる。該スクリュー(4) は連続のスクリューではなく、パドルミキサータイプのものでもよい。
該シリンダ(2)中間部外側にはジャケット(6) が周設され、図２に示すように該ジャケット(6) 内には加熱手段として加熱ヒータ(6A)がシリンダ(2) の外周にそってまかれており、上記シリンダ(2) 内に供給された木質材料Ｔは予熱され、かつ乾燥される。該シリンダ(2) 内の温度は通常１８０〜２３０℃に設定される。加熱手段としては加熱ヒータ(6A)以外に油等の熱媒体、加熱空気等を用いてもよい。
【００１０】
上記シリンダ(2)のジャケット(6) 部分において、シリンダ(2) には熱可塑性樹脂溶融発泡物Ｒが供給される。即ち熱可塑性樹脂は溶融供給器(11)のホッパー(12)からシリンダ(13)内に投入され、該シリンダ(13)内で加熱溶融されつゝ該シリンダ(13)に内設されモーター(15)によって駆動回転されているスクリュー(14)によって発泡室(16)に送られる。
【００１１】
該発泡室(16)内に送られた熱可塑性樹脂溶融物にはブロア(17)によって圧搾空気が送り込まれ、ホイップされることによって泡状の熱可塑性樹脂溶融発泡物Ｒになり、この状態でシリンダ(2) 内に供給され木質材料Ｔに混合される。上記したように熱可塑性樹脂溶融発泡物Ｒは泡状の溶融発泡物になっているので、通常の熱可塑性樹脂溶融物の数倍〜数十倍のかさになり、木質材料Ｔに対する分散性が格段に向上し、木質材料Ｔにまんべんなく付着し均一に混合される。またこの部分ではジャケット(6) 内の加熱ヒータ(6A)でシリンダ(2) 内が加熱されているので、熱可塑性樹脂溶融発泡物Ｒは木質材料Ｔに混合される時点で冷却固化することなく、均一に混合し好都合な溶融状態を維持する。
【００１２】
このようにして熱可塑性樹脂溶融発泡物Ｒを均一に混合された木質材料Ｔはシリンダ(2) 先端側に送られ、この部分である程度圧密されつゝダイ(18)から板状に押出される。
ダイ(18)から押出された板状成形物Ｍ中の熱可塑性樹脂溶融発泡物Ｒはこの時点ではほとんど脱泡されておらず、該板状成形物Ｍは低密度の粗な状態となっている。
該板状成形物Ｍは一連の圧延ロール(19,20) によって圧延され、この時点で該板状成形物Ｍは脱気され、該板状成形物Ｍは所定の比重、厚みに調節される。そして最後に挟持冷却手段であるキャタピラープレス(21)によって挟持冷却され、カッター(22)によって所定寸法に切断され製品Ｐになる。
【００１３】
図３〜図５には本発明の木質成形体の他の製造方法が示される。この製造方法ではまず前実施例と同様に溶融供給器(11)から熱可塑性樹脂溶融物を発泡器(16)に送り込み、ブロア(17)からの圧搾空気によって該熱可塑性樹脂溶融物をホイップし発泡させる。
該熱可塑性樹脂溶融発泡物Ｒは図３に示すように上記発泡器(16)から木質材料Ｔが充填されているミキシングタンク(23)内に投入され、攪拌機(24)によって該木質材料Ｔと混合される。
上記木質材料Ｔと熱可塑性樹脂溶融発泡物Ｒとの混合物Ａは、図４に示すように原料供給用コンベア(25)から散布コンベア(26)に供給され、該散布コンベア(26)上で散布量を調節用ブラッシングロール(27,28) で調節されつゝ、散布用ブラッシングロール(29)にて型板搬送用コンベア(30)上で搬送されている型板(31)上に散布される。
【００１４】
型板(31)上に散布された混合物Ａは上からプレスコンベア(32)によってプレスされるが、該プレスコンベア(32)は前端から厚み調製部(32A) 、加熱室(33)内において熱間プレス部(32B) 、加熱室(33)外において冷間プレス部(32C)に区画され、型板搬送用コンベア(30)もそれに対応して厚み調製部(30A) 、熱間プレス部(30B) 、冷間プレス部(30C) に区画されている。
【００１５】
したがって混合物Ａは厚み調製部(30A,32A) で厚みを次第に圧縮され、この間で混合物Ａは脱気され、熱間プレス部(30B,32B) で熱間プレスされ、冷間プレス部(30C,32C) で冷却固化され、板状成形物Ｍとなる。該板状成形物Ｍは後段搬送コンベア(34)によって型板(31)と共に搬送され、その間にカッター(35)によって所定寸法に裁断される。
以下に本発明の実施例を示す。
【００１６】
〔実施例１〕
図１および図２に示す装置によって下記の組成で木質成形体を製造した。
木片 *1 ５０重量部
再生ポリプロピレン ５０重量部
*1：幅１〜５mm、長さ５〜１５mm、厚み０．５〜２mm
上記ポリプロピレンは溶融供給器(11)内で２３０℃に加熱され、発泡室(16)内でホイップされた上で木片Ｔに添加混合された。圧延ロール(19,20) の圧力は６ＭＰa で、冷却キャタピラープレス(21)は０．５ＭＰa の圧力であった。
得られた木質成形体の比重は０．６８ g／cm3 、曲げ強度は３５Ｎ／mm2 、釘保持力（３φリングネイル使用）は８Ｎ／mm2 、２４時間吸水率は１８％、２４時間吸水厚み膨潤率は３．１％であった。
【００１７】
〔実施例２〕
図３〜５に示す装置を使用して実施例１と同様の組成で木質成形体を製造した。熱間ロールプレス(32B) の圧力は６ＭＰa 、温度は２３０℃、冷間ロールプレス(32C) の圧力は０．５ＭＰa に設定した。
得られた木質成形体の比重は０．６５ g／cm3 、曲げ強度は３２Ｎ／mm2 、釘保持力は７．２Ｎ／mm2 、２４時間吸水率は１９％、２４時間吸水厚み膨潤率は３．２％であった。
【００１８】
【発明の効果】
本発明では熱可塑性樹脂をバインダーとして使用して効率良く木質成形体を製造することが出来、熱可塑性樹脂は再生品を使用することが出来、樹脂のリサイクル性も向上する。
【図面の簡単な説明】
図１および図２は本発明の一実施例を示すものである。
【図１】 製造装置の概略図
【図２】 ジャケット部分の側断面図
図３〜図５は本発明の他の実施例を示すものである。
【図３】 ミキシングタンクの説明図
【図４】 原料混合物散布状態説明図
【図５】 プレス成形状態説明図
【符号の説明】
1 押出機（押出成形機）
2 シリンダ
3 ホッパー
4 スクリュー
6 ジャケット
6A 加熱手段
18 ダイ
19,20 圧延ロール
21 挟持冷却手段（キャタピラープレス）
Ａ 混合物
Ｍ 板状成形物
Ｒ 熱可塑性樹脂溶融発泡物
Ｔ 木質材料（木片）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wooden molded body used for a building board and a method for producing the same.
[0002]
[Prior art]
For example, a conventional wooden molded body such as a hard board is manufactured by adding a thermosetting resin such as a phenol resin, a urea resin, and a melamine resin as a binder to a wooden material and hot pressing it.
When a thermoplastic resin is used as the binder, a recycled product can be used as the thermoplastic resin, and waste wood-molded products using the thermoplastic resin as a binder can be easily recycled as chips.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional manufacturing method, when a wooden molded body is manufactured using a thermoplastic resin as a binder, it is necessary to perform cold pressing after hot pressing, which requires many steps and labor. In addition, two press devices are required, which increases the equipment cost.
[0004]
[Means for Solving the Problems]
As a means for the present invention is to solve the conventional problems described above, the woody material T from the cylinder (2) a hopper attached to the root end (3) into the cylinder (2) of the press molding machine (1) Then, the screw (4) provided in the cylinder (2) is rotated to feed the wood material T to the tip side of the cylinder (2), and thermoplastic resin melt foaming is performed at the intermediate part of the cylinder (2). The product R is added to and mixed with the wood material T, and the mixture A of the wood material T and the thermoplastic resin molten foam R is extruded into a plate shape from a die (18) at the tip of the cylinder (2). , 20), and a method for producing a woody molded product in which the plate-like molded product M is cooled by sandwiching and cooling means (21). In the intermediate part of the thermoplastic resin melt foam R addition mixing part of the cylinder (2) of the extruder (1), a jacket (6) is provided on the outer periphery of the cylinder (2). It is desirable to heat the wood material T and the thermoplastic resin molten foam R by interpolating a heating means (6A), and the thermoplastic resin molten foam R is a cylinder (2) It is desirable to be formed by blowing and whipping compressed air before it is added inside.
Furthermore, the present invention provides a method for producing a wood molded body, in which a mixture A of a wood material T and a thermoplastic resin melt foam R is sprayed on a template to form a mat, and the mat is pressed to be molded. Is. The template moves on a roll conveyor, and the mat formed on the template is preferably hot roll pressed and then cold roll pressed.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
[Wood material]
The woody material used in the present invention is, for example, wood fragments, strands, wood flour, wood wool, wood fiber bundles, wood pulp, etc., or pulverized products such as cut pieces and waste materials generated when constructing or demolishing a wooden building In particular, a wood piece having a width of 1 to 5 mm, a length of 5 to 20 mm, and a thickness of 0.2 to 2 mm is desirable.
Also, if the wood material contains a large amount of moisture, water vapor is generated from the piece of wood during heating, and a water vapor film is formed between the wood material and the thermoplastic resin foam, and the wood material and the thermoplastic resin melt. Since the adhesion with the foamed material becomes insufficient, the wood material is usually dried to a moisture content of less than 5% with a dryer after the raw material is subdivided.
[0006]
〔Thermoplastic resin〕
As the thermoplastic resin used in the present invention, polyolefin resins such as polyethylene and polypropylene are mainly used. Polystyrene, polymethacrylate, polyamide, polyester, polyvinyl acetate, acrylic resin, acrylonitrile-butadiene copolymer, A thermoplastic resin such as a styrene-butadiene copolymer or an acrylonitrile-butadiene-styrene copolymer may be used.
The thermoplastic resins may be used in combination of two or more, and may be a recycled product of the thermoplastic resin waste material.
[0007]
[Thermoplastic resin melt foam]
The thermoplastic resin melt foam is formed by blowing and whipping the melt of the thermoplastic resin into the foaming chamber with compressed air. In this case, the thermoplastic resin melt may be stirred by a stirrer.
[0008]
[Combination]
The mixing weight ratio of the wood material and the thermoplastic resin is usually about 50:50 to 80:20. However, since the thermoplastic resin is melted and then foamed, even after the mixing weight ratio of the wood material and the thermoplastic resin is 80:20, the bulk after foaming is overwhelmingly the thermoplastic resin melted foam. Is bigger.
In addition to the wood material and the thermoplastic resin, the wood molded article of the present invention may be added with an impact resistance improving material such as rubber or elastomer, a water repellent such as silicon, wax or paraffin.
[0009]
[Manufacturing method of woody molded body]
1 and 2, the wood material T is introduced from the hopper (3) to the inner root end of the cylinder (2) of the extruder (1). Is sent to the front end side of the cylinder (2) indicated by arrow A in FIG. 1 by a screw (4) installed in the cylinder (2) and driven and rotated by a motor (5). The screw (4) may be a paddle mixer type instead of a continuous screw.
A jacket (6) is provided on the outer side of the intermediate portion of the cylinder (2), and a heater (6A) as a heating means is provided along the outer periphery of the cylinder (2) in the jacket (6) as shown in FIG. The wood material T supplied to the cylinder (2) is preheated and dried. The temperature in the cylinder (2) is usually set to 180 to 230 ° C. As a heating means, in addition to the heater (6A), a heat medium such as oil, heated air or the like may be used.
[0010]
In the jacket (6) portion of the cylinder (2), a thermoplastic resin molten foam R is supplied to the cylinder (2). That is, the thermoplastic resin is charged into the cylinder (13) from the hopper (12) of the melting feeder (11) and is heated and melted in the cylinder (13). ) Is sent to the foaming chamber (16) by the screw (14) which is driven and rotated by the motor.
[0011]
The thermoplastic resin melt sent into the foaming chamber (16) is fed with compressed air by a blower (17) and is whipped to form a foamed thermoplastic resin melt foam R. In this state, It is fed into the cylinder (2) and mixed with the wood material T. As described above, since the thermoplastic resin melt foam R is a foam-like melt foam, it is several times to several tens of times larger than a normal thermoplastic resin melt, and the dispersibility with respect to the wood material T is remarkably high. Improve and adhere evenly to the woody material T and mix evenly. Further, in this portion, the inside of the cylinder (2) is heated by the heater (6A) in the jacket (6), so that the thermoplastic resin molten foam R is not cooled and solidified when it is mixed with the wood material T. Mix uniformly and maintain a convenient molten state.
[0012]
The wood material T in which the thermoplastic resin melted foam R is uniformly mixed in this way is sent to the tip of the cylinder (2) and is pressed to a plate shape from the die (18) after being consolidated to some extent in this portion. .
The thermoplastic resin melt foam R in the plate-like molded product M extruded from the die (18) is hardly defoamed at this point, and the plate-like molded product M is in a low-density rough state. Yes.
The plate-shaped product M is rolled by a series of rolling rolls (19, 20). At this time, the plate-shaped product M is deaerated, and the plate-shaped product M is adjusted to have a predetermined specific gravity and thickness. . Finally, it is nipped and cooled by a caterpillar press (21) that is a nipping cooling means, and is cut into a predetermined dimension by a cutter (22) to become a product P.
[0013]
3 to 5 show another method for producing the woody molded body of the present invention. In this production method, the thermoplastic resin melt is first sent from the melt feeder (11) to the foamer (16) as in the previous embodiment, and the thermoplastic resin melt is whipped by the compressed air from the blower (17). Foam.
As shown in FIG. 3, the thermoplastic resin melt foam R is put into the mixing tank (23) filled with the wood material T from the foamer (16), and is mixed with the wood material T by the stirrer (24). Mixed.
As shown in FIG. 4, the mixture A of the wood material T and the thermoplastic resin molten foam R is supplied from the material supply conveyor (25) to the spraying conveyor (26) and sprayed on the spraying conveyor (26). When the amount is adjusted by the brushing rolls (27, 28) for adjustment, the amount is spread on the template (31) being conveyed on the template conveying conveyor (30) by the spreading brush roll (29). .
[0014]
The mixture A sprayed on the template (31) is pressed from above by a press conveyor (32). The press conveyor (32) is heated from the front end in the thickness adjusting section (32A) and the heating chamber (33). The intermediate press section (32B) is divided into a cold press section (32C) outside the heating chamber (33), and the template conveying conveyor (30) is also correspondingly provided with a thickness adjusting section (30A), a hot press section ( 30B) and is partitioned into a cold press section (30C).
[0015]
Accordingly, the thickness of the mixture A is gradually compressed by the thickness adjusting section (30A, 32A). During this time, the mixture A is degassed and hot pressed by the hot press section (30B, 32B), and the cold press section (30C, 32C, 30A, 32B). 32C) is cooled and solidified to form a plate-like molded product M. The plate-shaped molded product M is transported together with the mold plate (31) by the subsequent transport conveyor (34), and is cut into a predetermined dimension by the cutter (35) during that time.
Examples of the present invention are shown below.
[0016]
[Example 1]
A wood molded body was produced with the following composition using the apparatus shown in FIGS.
Wood pieces * 1 50 parts by weight Recycled polypropylene 50 parts by weight
* 1: Width 1-5mm, length 5-15mm, thickness 0.5-2mm
The polypropylene was heated to 230 ° C. in the melt feeder (11), whipped in the foaming chamber (16), and added to the wood piece T and mixed. The pressure of the rolling rolls (19, 20) was 6 MPa, and the cooling caterpillar press (21) was 0.5 MPa.
The wood compact thus obtained has a specific gravity of 0.68 g / cm 3 , a bending strength of 35 N / mm 2 , a nail holding force (using 3φ ring nails) of 8 N / mm 2 , a 24-hour water absorption rate of 18%, and a 24-hour period. The water absorption thickness swelling ratio was 3.1%.
[0017]
[Example 2]
Using the apparatus shown in FIGS. 3 to 5, a wood molded body was produced with the same composition as in Example 1. The pressure of the hot roll press (32B) was set to 6 MPa, the temperature was set to 230 ° C., and the pressure of the cold roll press (32C) was set to 0.5 MPa.
The wood compact thus obtained has a specific gravity of 0.65 g / cm 3 , a bending strength of 32 N / mm 2 , a nail holding power of 7.2 N / mm 2 , a 24-hour water absorption rate of 19%, and a 24-hour water absorption thickness swelling rate. Was 3.2%.
[0018]
【The invention's effect】
In the present invention, a wood molded article can be produced efficiently using a thermoplastic resin as a binder, a recycled product can be used as the thermoplastic resin, and the recyclability of the resin is improved.
[Brief description of the drawings]
1 and 2 show an embodiment of the present invention.
FIG. 1 is a schematic view of a manufacturing apparatus. FIG. 2 is a side sectional view of a jacket portion. FIGS. 3 to 5 show another embodiment of the present invention.
[Fig. 3] Explanatory drawing of mixing tank [Fig. 4] Explanatory drawing of raw material mixture [Fig. 5] Explanatory drawing of press molding [Explanation of symbols]
1 Extruder (extrusion molding machine)
2 cylinder
3 Hopper
4 screw
6 jacket
6A heating means
18 die
19,20 rolling roll
21 Clamping cooling means (caterpillar press)
A Mixture M Plate-shaped molding R Thermoplastic resin melt foam T Wood material (wood piece)
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000230315A JP3974316B2 (en) | 2000-07-31 | 2000-07-31 | Method for producing a wooden molded body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000230315A JP3974316B2 (en) | 2000-07-31 | 2000-07-31 | Method for producing a wooden molded body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002036335A JP2002036335A (en) | 2002-02-05 |
| JP3974316B2 true JP3974316B2 (en) | 2007-09-12 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000230315A Expired - Fee Related JP3974316B2 (en) | 2000-07-31 | 2000-07-31 | Method for producing a wooden molded body |
Country Status (1)
| Country | Link |
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| JP (1) | JP3974316B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005238554A (en) * | 2004-02-25 | 2005-09-08 | Misawa Homes Co Ltd | Extrusion foaming method and extrusion foaming machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2895714B2 (en) * | 1993-06-24 | 1999-05-24 | 新日本製鐵株式会社 | Extruder structure in waste plastic recycling facility |
| JPH08142143A (en) * | 1994-11-15 | 1996-06-04 | Nok Corp | Extrusion device of molding machine |
| JP3330794B2 (en) * | 1995-08-29 | 2002-09-30 | ニチハ株式会社 | Building board and method of manufacturing building board |
| JPH10305470A (en) * | 1997-05-02 | 1998-11-17 | Misawa Homes Co Ltd | Woody product and its manufacture |
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| JP2002036335A (en) | 2002-02-05 |
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