JP3686757B2 - Wood product manufacturing method and manufacturing mold - Google Patents

Wood product manufacturing method and manufacturing mold Download PDF

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JP3686757B2
JP3686757B2 JP16616398A JP16616398A JP3686757B2 JP 3686757 B2 JP3686757 B2 JP 3686757B2 JP 16616398 A JP16616398 A JP 16616398A JP 16616398 A JP16616398 A JP 16616398A JP 3686757 B2 JP3686757 B2 JP 3686757B2
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wood
raw material
wooden
container
presser
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JPH11342504A (en
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喜三郎 幸村
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有限会社コウムラテクノ
ノア・エンジニアリング株式会社
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Description

【0001】
【発明の属する技術分野】
本発明は、木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等の木質原料から、ボード状、柱状、棒状、塊状、三次元形状等の各種形状をなす木質製品を製造する方法と製造用型に関するものである。
【0002】
【従来の技術】
従来、木質ボードの製造方法としては、木材小片、木材繊維、竹材繊維等の木質原料と、接着剤としての熱硬化性樹脂(フェノール樹脂等)とを混合し、所定の形状に成形し、これを熱板ホットプレスで加熱して熱硬化性樹脂を熱硬化させ、木質原料を固着させる方法(MDF)が一般的に行なわれている。
【0003】
【発明が解決しようとする課題】
上述したように、従来の木質ボードは熱硬化性樹脂を使用するので、樹脂材料費が必要で、高価となってしまう。また、木質原料と熱硬化性樹脂とを混合して固着・堅牢化することから、木材の特質である吸水性が失われるとともに、廃棄するときには、再利用ができず、熱硬化性樹脂による有害ガス等の公害が発生するという問題があった。
【0004】
そこで、最近、接着剤としての樹脂等を使用せずに、木材小片、木材繊維等の木質原料だけを使用して木質ボードを製造する方法が検討されている。この新しい木質ボードは、従来のMDFの設備では製造不可能であり、新しい製造装置が必要となる。この新しい製造装置としては、高温高圧水蒸気加熱装置と圧縮装置(プレス機等)とを組合わせたものが検討されているが、複雑な装置となるため設備費が高くなり、また、大型の装置となるため設置に困ることになる。また、同時に製造できる木質ボードの数が限られるので、効率上の問題がある。
【0005】
本発明の目的は、上記問題を解決し、接着剤を実質的に添加しない木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等の木質原料から木質製品を製造することができ、木材の吸水性を保てる、廃棄時の再利用が可能になる、接着剤による公害を無くせる等の効果が得られるだけでなく、その製造を簡易、安価且つ小型の装置により効率的に行うことができる木質製品の製造方法及び製造用型を提供することにある。
【0006】
【課題を解決するための手段】
(1)まず、本発明に係る木質製品の製造方法は、
製造用型の容器部にその開口から接着剤を実質的に添加しない木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等の木質原料を充填する木質原料充填工程と、
前記製造用型を加熱装置に入れ、木質原料を80℃以上に加熱することにより軟化させる木質原料軟化工程と、
前記製造用型を加熱装置から出して圧縮装置にセットし、容器部にその開口から嵌挿した製造用型の押え部を容器部内に押し込んで木質原料を圧縮するとともに、押え部をその押し込み位置にロック機構によりロックする木質原料圧縮工程と、
前記製造用型を圧縮装置から外して前記ロックしたロック機構と共に加熱装置に入れ、圧縮状態の木質原料を180℃以上に加熱してから、前記製造用型を加熱装置中で又は加熱装置から出して冷却することにより木質原料を圧縮状態のままに固定化して木質製品にする木質原料固定化工程と、
前記ロック機構のロックを解除して容器部から押え部を外すとともに木質製品を脱型する木質製品脱型工程とを含む。
【0007】
ここで、木質原料軟化工程における加熱は、湿式加熱(積極的に水分を加えて行う加熱をいう。)が好ましいが、木質原料が水分を含んでいる場合には乾式加熱(積極的に水分を加えることはしない加熱をいう。)でもよい。湿式加熱としては、高温高圧水蒸気加熱や、予め木質原料に水分を含ませてからの高周波加熱等を例示できる。この加熱温度は、100℃以上がさらに好ましい。この加熱温度の上限は、特に限定されないが、150℃程度までが適当である。なお、軟化は加熱以外の方法(例えば軟化剤の添加等)でも可能であるが、本製造用型を使用する場合には、効率、費用等の点で加熱が最も適する。
【0008】
木質原料固定化工程における加熱についても、湿式加熱が好ましいが、木質原料が水分を含んでいる場合には乾式加熱でもよい。湿式加熱の例示は、上記の通りである。この加熱温度は、湿式加熱の場合は180℃以上が好ましいが、乾式加熱の場合は200℃以上が好ましい。この加熱温度の上限は、特に限定されず、木質原料を傷めない程度が適当である。
【0009】
木質原料軟化工程で使用する加熱装置は、木質原料固定化工程で使用する加熱装置と共用してもよいし別の加熱装置としてもよい。
【0010】
木質原料充填工程と木質原料軟化工程との間に、「前記製造用型を圧縮装置にセットし、木質原料を予備圧縮する木質原料予備圧縮工程」を含ませることが好ましい。同工程の主目的は、嵩高な木質原料の高さを減少させることにあるので、木質原料を充填時の高さに対して1/4〜3/4の高さにまで予備圧縮することが好ましい(さらに好ましくは1/3〜2/3)。
【0011】
これに対し、木質原料圧縮工程の主目的は、木質原料の木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等をその後の木質原料固定化工程で固定化できる程度に圧密することにあり、また木質原料の種類によって充填時の密度が異なるので、適当な圧縮率を高さの変化で特定するのは困難である。
【0012】
さらに、前記予備圧縮後に、容器部の開口側部分を取り外して予備圧縮した木質原料が入っている底側部分だけにすることにより容器部の高さを減少させれば、その後の木質原料軟化工程、木質原料圧縮工程及び木質原料固定化工程において、使用する加熱装置や圧縮装置の高さを低くしたり、同時に処理できる木質原料の数を増やしたりすることができる。
【0013】
また、木質原料軟化工程、木質原料圧縮工程及び木質原料固定化工程においては、複数の容器部と複数の押え部とを交互にして複数段に配設し、木質原料の軟化、圧縮及び固定化の各処理を全段で同時に行うことが、効率、費用等の点で好ましい。
【0014】
(2)次に、本発明に係る木質製品の製造用型は、開口及び底の有る容器部と、前記容器部にその開口から嵌挿し得る押え部と、前記容器部に木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等の木質原料を充填し、押え部を容器部内に押し込んで木質原料を圧縮したときに、押え部をその押し込み位置にロックするロック機構とを備える。
【0015】
前記容器部を載置する基板と、前記基板から垂立して押え部に延設した延設板の案内穴を貫通することにより押え部の押し込み時の移動を案内する案内柱とを備えることが好ましい。この場合、基板と延設板との間に、押え部を容器部の上方にフローティング状態で支持する支持バネを介装するとさらに好ましい。
【0016】
ロック機構は、上記各構成に応じて、次の▲1▼▲2▼▲3▼▲4▼のように構成することが好ましい。
▲1▼ ロックできる押し込み位置を段階的又は連続的に変更可能に構成すること。
▲2▼ 押え部を押し込むだけで押え部をその押し込み位置に自動的にロックするように構成すること。同ロック機構としては、ラチェット機構を例示できる。
▲3▼ 押え部を案内柱に対して係止するように構成すること。
▲4▼ 案内柱に形成した溝爪と、溝爪に係止し得るように押え部に設けた止め爪と、止め爪を溝爪側へ付勢する付勢バネとからなるラチェット機構とすること。
なお、ロック機構は、ラチェット機構に限るものではなく、例えば、ネジ締付機構や、ピン差込み機構でもよい。
【0017】
また、前記容器部を、開口側の枠部と、底側の有底枠部とに分割構成し、有底枠部に対して枠部を取り外し可能に取り付けることが好ましい。この場合、有底枠部と枠部との全高に対して、有底枠部の高さを1/4〜3/4とすることが好ましい(さらに好ましくは1/3〜2/3)。
【0018】
前記容器部の底の内面上に、中敷部を離脱可能に設置することが好ましい。この場合、容器部の底に、中敷部を押して離脱させるための抜き穴を形成するとさらに好ましい。
【0019】
また、同時に処理できる木質原料の数を増やすために、上記各構成に応じて、次の(a)(b)のように構成することが好ましい。
【0020】
(a)複数の容器部と複数の押え部とを交互にして複数段に配設することにより、全段の押え部を容器部内に同時に押し込めるように構成するとともに、全段の押え部をその押し込み位置に同時にロックできるようにロック機構を構成すること。
【0021】
(b)案内柱に複数の押え部の延設板を貫通させ、各押え部の上に複数の容器部を一つずつ載置し、もって複数の容器部と複数の押え部とを交互にして複数段に配設することにより、全段の押え部を容器部内に同時に押し込めるように構成するとともに、全段の押え部をその押し込み位置に同時にロックできるようにロック機構を構成すること。
【0022】
(3)さらに、本発明に係る木質製品の別の製造方法は、上記(2)の製造用型を利用するものである。すなわち、接着剤を実質的に添加しない木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等の木質原料を加熱装置に入れて圧縮状態で加熱してから冷却することにより木質原料を圧縮状態のままに固定化して木質製品にする方法であって、前記加熱装置には、前記木質原料の他としては、開口及び底の有る容器部と、前記容器部にその開口から嵌挿し得る押え部と、前記容器部に木質原料を充填し、押え部を容器部内に押し込んで木質原料を圧縮したときに、押え部をその押し込み位置にロックするロック機構とを備えた木質製品の製造用型を入れることとし、前記押え部を容器部内に押し込んで木質原料を圧縮する圧縮装置は入れないこととする木質製品の製造方法である。
なお、上記各発明において、木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等の木質原料は、その一単位が製造する木質製品よりも寸法、厚さ等の小さいものであれば、具体的形状は限定されず、また、新材でも屑材でも廃材(再利用)でもよい。
【0023】
木質原料の充填方法は、特に限定されず、木材粉、木材小片、木材繊維、竹材繊維、枝葉等の一種又は複数種をランダムに充填したり、あるいは所定の規則に従って充填したり、木材薄板を積層したり、木材粉、木材小片、木材繊維、竹材繊維、枝葉等の充填と木材薄板の積層とを交互に繰り返したりする方法を例示できる。
【0024】
「接着剤を実質的に添加しない」とは、接着剤を全く添加しない場合のみならず、木の特質である吸水性が失われない程度の微量の接着剤を添加した場合や、廃材となった場合に接着剤による公害が発生しない程度の微量の接着剤を添加した場合も含む意味である。
【0025】
製造する木質製品の形状は、特に限定されず、ボード状、柱状、棒状、塊状、三次元形状等を例示できる。従って、製造用型の容器部及び押え部の形状は、木質製品の形状に応じて適宜決定できる。例えば、木質製品が木質ボードの場合、製造用型の容器部をトレー状とし、押え部を蓋状の押え板とする等である。
【0026】
【発明の実施の形態】
以下、本発明を木質ボードの製造方法及び製造用型に具体化した実施形態例について、図面を参照して説明する。
【0027】
まず、図1〜図4に示す第一実施形態の製造用型1は、開口及び底の有るトレー状の容器部2と、容器部2にその開口から嵌挿し得る押え部3と、容器部2に木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等の木質原料を充填し、押え部3を容器部2内に押し込んで木質原料を圧縮したときに、押え部3をその押し込み位置にロックするロック機構4とを備えている。さらに、製造用型1は、容器部2(後述する枠部21を外した有底枠部22のみ)を載置する基板5と、基板5から垂立して、押え部3に延設した延設板6の案内穴7を貫通することにより押え部3の押し込み時の移動を案内する太細2種類の案内柱8,9とを備えている。なお、基板5上には容器部2の位置決め手段(図示略)が設けられている。
【0028】
容器部2や押え部3は金属で形成されているが、金属に限定されるものではなく、例えばセラミック等の耐熱硬質材料でもよい。
【0029】
基板5と延設板6との間であって細い案内柱9の周囲には、押え部3を上へ付勢して容器部2の上方にフローティング状態で支持する支持バネ10が介装されている。また、細い案内柱9の上端部にはロックナット11が位置調節可能に螺着され、該ロックナット11が延設板6の上面に当接して押え部3の上限位置を規制している。
【0030】
ロック機構4は、太い案内柱8に形成したテーパー面15付きの溝爪16と、溝爪16に係止し得るように押え部3の延設板6に回動可能に軸支した一対の止め爪17と、図3に示すように、一対の止め爪17を接近させるようにして溝爪16側へ付勢する付勢バネ18とからなるラチェット機構である。このロック機構4によれば、図1から図2に示すように、押え部3を押し込むだけで押え部3をその押し込み位置に自動的にロックできる。図示例では、溝爪16が一段であるが、溝爪16を複数段に形成することにより、ロックできる押し込み位置を段階的に変更できるようになる。
【0031】
容器部2は、図4に示すように、開口側の枠部21と、底側の有底枠部22とに分割構成され、枠部21の周囲に取着された複数個の位置決め部材23が有底枠部22を抱持することにより、有底枠部22に対して枠部21が取り外し可能に取り付けられている。
【0032】
また、容器部2は、木質原料Mを所望寸法の木質ボードP(製品)にするために、製品面積と同じ内法面積を有するとともに、製品厚みに対して約5倍(2〜10倍が好ましい。)の内法高さを有している。本例では、製品厚みを2cmとするので、容器部2の内法高さは10cmである。また、有底枠部22と枠部21との全高(前記内法高さより底分だけ大きい)に対して、有底枠部22の高さは約1/2とされている。つまり、有底枠部22と枠部21の高さは略同じである。
【0033】
有底枠部22の底の内面上には、板状の中敷部24が離脱可能に設置されている。また、有底枠部22の底には、中敷部24を脱型治具(37)により押して離脱させるための抜き穴25が形成されている。
【0034】
次に、図5及び図6に示す第二実施形態の製造用型1は、次の諸点においてのみ、第一実施例と相違するものである。
▲1▼ 太い案内柱8を長く形成し、この太い案内柱8に複数の押え部3の延設板6を貫通させたこと。
▲2▼ 基板5と最上部の押え部3の延設板6との間に、最上部の押え部3を上へ付勢して最上部の容器部2の上方にフローティング状態で支持する長い支持バネ10を介装したこと。
▲3▼ 細い案内柱9及びロックナット11に代え、最上部から順に、相対的に上側の押え部3の延設板6から下方へ延びて相対的に下側の押え部3の延設板6を貫通する支持柱26を設け、該支持柱26とその下端部に螺合した支持ナット27とにより、相対的に下側の押え部3を吊下支持したこと。この吊下支持により、上から二段目以下の各押え部3を各段の容器部2の上方にフローティング状態で支持するようになっている。
▲4▼ 各押え部3の上に複数の容器部2(枠部21を外した有底枠部22のみ)を一つずつ載置したこと。
これら▲1▼〜▲4▼の構成により複数の容器部2と複数の押え部3とを交互にして複数段に配設し、もって全段の押え部3を容器部2内に同時に押し込めるようにしている。
▲5▼ 最上部の押え部3を押し下げたときに、順に全ての押え部3が押し下がり、最上部の延設板6に設けたロック機構4の止め爪17が、案内柱9の一ヵ所に形成した溝爪16に係止することで、全段の押え部3をその押し込み位置に同時にロックできるようにしたこと。
【0035】
次に、図7及び図8に示す第三実施形態の製造用型1は、次の諸点においてのみ、第一実施例と相違するものである。
▲1▼ 前記案内柱8,9に代えて、長く形成した案内柱28を基板5に垂立し、この案内柱28に最上部の押え部3の延設板6を貫通させたこと。
▲2▼ 基板5の上に複数の容器部2と複数の押え部3(前記最上部を除いて延設板6は無い。)とを交互に載置して複数段に配設し、全段の押え部3を容器部2内に同時に押し込めるようにしたこと。
▲3▼ 最上部の押え部3を押し下げたときに、全ての押え部3が押し下がり、所望の押し込み位置に達したときに、案内柱28の上端部に螺合したロック機構としての締付ナット29を最上部の延設板6に締め付けることで、全段の押え部3をその押し込み位置に同時にロックできるようしたこと。本例では、ロックできる押し込み位置を、締付ナット29の調節により連続的に変更できる。
【0036】
次に、上記製造用型1を使用して行う木質ボードの製造方法を、図9及び図10並びに前出の図1〜図8を参照して説明する。図10は製造現場の概略平面図であり、30は木質原料置場、31は重量計、32はフリーベアーテーブル、33は圧縮装置である。34は高温高圧水蒸気加熱装置、34aはその圧力容器、34bはそのボイラーである。35は運搬車、36は脱型作業場、37は脱型治具である。
【0037】
(1)木質原料充填工程
図4(b)に示すように、容器部2の有底枠部22に対して枠部21を取り付けるとともに、有底枠部22の底の上に中敷部24を設置する。本例では、木質原料Mを約10cmの高さに充填するので、枠部21の上端まで容器部2の高さが必要となる。なお、次の予備圧縮が小さく、この充填高さが5cm程度でよい場合は、充填時から枠部21を取り付けなくてもよい。
図9(a)に示すように、同容器部2にその開口から接着剤を実質的に添加しない木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等の木質原料Mを約10cmの高さ(本例では略満杯)に充填する。木質原料Mは木質原料置場30に置いてあったもので、重量計31で計量する。
【0038】
(2)木質原料予備圧縮工程
図9(b)に示すように、木質原料Mを充填した容器部2を圧縮装置33にセットし、木質原料を充填時の高さに対して約1/2の高さ(約5cm)にまで予備圧縮する。この予備圧縮後に、容器部2の枠部21を取り外して予備圧縮した木質原料Mが入っている有底枠部22だけにすることにより、容器部2の高さを1/2に減少させれば、その後の木質原料軟化工程、木質原料圧縮工程及び木質原料固定化工程において、使用する高温高圧水蒸気加熱装置34や圧縮装置33の高さを低くしたり、同時に処理できる木質原料の数を増やしたりすることができる。
【0039】
(3)製造用型セット工程
第一実施形態の場合は、図1に示すように、予備圧縮された木質原料Mが入った容器部2の有底枠部22だけを基板5の上に横から搬入して載置し、製造用型1をセットする。このとき、ロックナット11の螺合位置を調節することにより、押え部3の上下位置を、有底枠部22の横からの搬入(及び後の搬出)に邪魔にならないレベルであって且つ極力低いレベルにセットしておくとよい。ロック機構4の止め爪17は、溝爪16から上方へ外れている。
第二又は第三実施形態の場合は、それぞれ図5又は図7に示すように、前述の通り製造用型1をセットする。図9(c)は、こうしてセットした第二実施形態の製造用型1を示している。
【0040】
(4)木質原料軟化工程
図9(d)に示すように、前記セットした製造用型1(同図では第二実施形態のものであるが、勿論、第一又は第三実施形態のものでもよい。)を高温高圧水蒸気加熱装置34の圧力容器34aに入れ、ボイラー34bから圧力容器34aに圧填した高温高圧水蒸気で、木質原料Mを100℃以上に加熱することにより軟化させる。
【0041】
(5)木質原料圧縮工程
図9(e)に示すように、前記製造用型1を高温高圧水蒸気加熱装置34から出して圧縮装置33(ここではプレス機)にセットし、各容器部2にその開口から嵌挿した製造用型1の押え部3を容器部2内に押し込んで木質原料Mを圧縮するとともに、各押え部3をその押し込み位置にロック機構4により自動的にロックする。軟化した木質原料Mは、常圧下で圧力を加えると、容易に変形して圧縮成形ができる。本例では、木質原料Mの圧縮後の厚さを約2cmとする。第一実施形態は図2の状態となり、第二実施形態は図6の状態となり、第三実施形態は図8の状態となる。ロック機構4の動作については前述の通りである。
【0042】
(6)木質原料固定化工程
図9(f)に示すように、前記製造用型1を圧縮装置33から外して前記ロックしたロック機構4と共に再び高温高圧水蒸気加熱装置34の圧力容器34aに入れ、ボイラー34bから圧力容器に圧填した高温高圧水蒸気で、圧縮状態にある木質原料Mを180℃以上に湿式加熱し、その状態で所定時間(10分以上が好ましい。)おく。その後、製造用型1を圧力容器34aから出して冷却すれば(少なくとも120℃以下に冷却することが好ましい。)、木質原料Mは圧縮状態のままに固定化して、厚さ2cmの木質ボードPとなる。なお、この冷却は、圧力容器34aの中で行なってもよいが、圧力容器34aから出して行なった方が効率的である。
【0043】
(7)木質製品脱型工程
前記製造用型1を脱型作業場36でさらに冷却(作業者がさわれる程度の温度に冷却)した後で、ロック機構4のロックを解除して容器部2から押え部3を上昇させて外し、容器部2を横にスライドさせて取り出し、図9(g)に示すように、容器部2から木質ボードPを脱型する。このとき、抜き穴25から棒状の脱型治具37で中敷部24を突き上げると、簡単に脱型することができる。また、中敷部24の上面、押え部3の下面、容器部2の内側面等にテフロンコーティング等の剥離性のよい表面処理をしておくと、脱型が一層容易になる。木質ボードPを脱型した後、空になった容器部2は、この製造方法のスタート点である木質原料充填工程に戻される。
【0044】
以上の通り、容器部2と押え部3とロック機構4とを備えた本実施形態の製造用型1を使用することにより、木質原料軟化工程と木質原料圧縮工程と木質原料固定化工程とを分けることができるとともに、それらの工程に使用する高温高圧水蒸気加熱装置34と圧縮装置33とを別々に構成することができるため、両装置33,34を簡易、安価且つ小型のものとすることができる。また、その高温高圧水蒸気加熱装置34及び圧縮装置33の運転が短時間で簡単になり、連続化及び自動化も可能となって、生産性が著しく向上する。
【0045】
なお、本発明は前記実施形態に限定されるものではなく、例えば以下のように、発明の趣旨から逸脱しない範囲で適宜変更して具体化することもできる。
(1)位置決め部材23に代えて、枠部21の下端面と有底枠部22の上端面とに位置決め凹部と位置決め凸部とを相対的に設け、これら凹・凸部の嵌合により、有底枠部22に対して枠部21を取り外し可能に取り付けること。
(2)容器部2及び押え部3の一方又は両方に、加熱装置を直接設けること。
【0046】
【発明の効果】
以上説明したように、本発明に係る木質製品の製造方法及び製造用型によれば、接着剤を実質的に添加しない木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等の木質原料から木質製品を製造することができ、木材の吸水性を保てる、廃棄時の再利用が可能になる、接着剤による公害を無くせる等の諸効果が得られるだけでなく、その製造を簡易、安価且つ小型の装置により効率的に行うことができる。
【図面の簡単な説明】
【図1】本発明の第一実施形態に係る木質ボードの製造用型の圧縮前の状態を示す断面図である。
【図2】同製造用型の圧縮後の状態を示す断面図である。
【図3】同製造用型の平面図である。
【図4】同製造用型の容器部を示し、(a)は組立前の状態を示す分解斜面図、(b)は組立後の状態を示す斜面図である。
【図5】本発明の第二実施形態に係る木質ボードの製造用型の圧縮前の状態を示す断面図である。
【図6】同製造用型の圧縮後の状態を示す断面図である。
【図7】本発明の第三実施形態に係る木質ボードの製造用型の圧縮前の状態を示す断面図である。
【図8】同製造用型の圧縮後の状態を示す断面図である。
【図9】本発明の木質ボードの製造方法における各工程を示す概略説明図である。
【図10】同製造方法の製造現場の概略平面図である。
【符号の説明】
1 製造用型
2 容器部
3 押え部
4 ロック機構
5 基板
6 延設板
7 案内穴
8 太い案内柱
9 細い案内柱
10 支持バネ
11 ロックナット
15 テーパー面
16 溝爪
17 止め爪
18 付勢バネ
21 枠部
22 有底枠部
23 位置決め部材
24 中敷部
25 抜き穴
26 支持柱
27 支持ナット
28 案内柱
29 締付ナット
33 圧縮装置
34 高温高圧水蒸気加熱装置
34a 圧力容器
34b ボイラー
37 脱型治具
M 木質原料
P 木質ボード
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a wood product having various shapes such as a board shape, a column shape, a rod shape, a lump shape, and a three-dimensional shape from a wood raw material such as wood powder, wood piece, wood fiber, bamboo fiber, branch leaf, and wood thin plate. And manufacturing molds.
[0002]
[Prior art]
Conventionally, as a method for manufacturing a wooden board, a wood raw material such as a small piece of wood, wood fiber or bamboo fiber is mixed with a thermosetting resin (such as a phenolic resin) as an adhesive and molded into a predetermined shape. In general, a method (MDF) in which the thermosetting resin is thermally cured by heating with a hot plate hot press to fix the wood raw material is performed.
[0003]
[Problems to be solved by the invention]
As described above, since the conventional wood board uses a thermosetting resin, the resin material cost is required and it becomes expensive. In addition, because wood materials and thermosetting resins are mixed and fixed and fastened, the water absorption characteristic of wood is lost, and when it is discarded, it cannot be reused and harmful due to thermosetting resins. There was a problem that pollution such as gas occurred.
[0004]
Therefore, recently, a method for producing a wooden board using only wooden raw materials such as small pieces of wood and wood fibers without using a resin or the like as an adhesive has been studied. This new wood board cannot be manufactured by conventional MDF equipment, and a new manufacturing apparatus is required. As this new manufacturing device, a combination of a high-temperature and high-pressure steam heating device and a compression device (press machine, etc.) has been studied. Therefore, installation will be troubled. In addition, there is a problem in efficiency because the number of wood boards that can be manufactured simultaneously is limited.
[0005]
The object of the present invention is to solve the above problems, and to produce a wood product from wood raw materials such as wood powder, wood pieces, wood fibers, bamboo fiber, branches and leaves, and wood thin plates, to which no adhesive is substantially added, Not only can the water absorption of the wood be maintained, it can be reused at the time of disposal, the pollution caused by the adhesive can be eliminated, etc., but also the manufacture can be carried out efficiently with a simple, inexpensive and small device. It is to provide a method for manufacturing a wooden product and a mold for manufacturing.
[0006]
[Means for Solving the Problems]
(1) First, the method for producing a wooden product according to the present invention is as follows.
A wood raw material filling process for filling wood raw materials such as wood powder, wood pieces, wood fibers, bamboo fiber, branches and leaves, wood thin plates, etc., in which adhesive is not substantially added to the container part of the production mold,
Putting the production mold into a heating device, and softening the wooden raw material by heating the wooden raw material to 80 ° C. or higher; and
The manufacturing die is taken out of the heating device and set in the compression device, and the pressing portion of the manufacturing die fitted into the container portion through the opening is pressed into the container portion to compress the wood raw material, and the pressing portion is in its pushing position. A wood raw material compression process that is locked by a locking mechanism;
The manufacturing mold is removed from the compression apparatus and placed in a heating apparatus together with the locked locking mechanism. After heating the compressed woody material to 180 ° C. or higher, the manufacturing mold is taken out from the heating apparatus or from the heating apparatus. A wooden raw material fixing process to fix the wooden raw material in a compressed state by cooling it into a wooden product,
A wooden product demolding step of releasing the lock mechanism to remove the presser from the container and demolding the wooden product.
[0007]
Here, the heating in the wood raw material softening step is preferably wet heating (referred to heating performed by actively adding moisture), but if the wooden raw material contains moisture, dry heating (actively removing moisture). It may be heating that is not added.) Examples of the wet heating include high-temperature and high-pressure steam heating and high-frequency heating after moisture is previously contained in the woody material. The heating temperature is more preferably 100 ° C. or higher. The upper limit of the heating temperature is not particularly limited, but is suitably up to about 150 ° C. Softening can be performed by a method other than heating (for example, addition of a softening agent). However, when using this production mold, heating is most suitable in terms of efficiency, cost, and the like.
[0008]
The heating in the wood raw material fixing step is also preferably wet heating, but may be dry heating when the wooden raw material contains moisture. Examples of wet heating are as described above. The heating temperature is preferably 180 ° C. or higher in the case of wet heating, but is preferably 200 ° C. or higher in the case of dry heating. The upper limit of the heating temperature is not particularly limited, and is suitable to the extent that the wood material is not damaged.
[0009]
The heating device used in the wood raw material softening step may be shared with the heating device used in the wooden raw material fixing step, or may be a separate heating device.
[0010]
It is preferable to include a “wood raw material pre-compression step in which the production mold is set in a compression device and the wooden raw material is pre-compressed” between the wooden raw material filling step and the wooden raw material softening step. The main purpose of the process is to reduce the height of the bulky wood material, so that the wood material can be pre-compressed to a height of 1/4 to 3/4 of the height at the time of filling. Preferred (more preferably 1/3 to 2/3).
[0011]
On the other hand, the main purpose of the wood raw material compression process is to compact the wood raw material wood powder, wood pieces, wood fibers, bamboo fiber, branches and leaves, wood thin plates, etc., so that they can be fixed in the subsequent wood raw material fixing process. In addition, since the density at the time of filling differs depending on the kind of the wood raw material, it is difficult to specify an appropriate compression ratio by changing the height.
[0012]
Furthermore, after the preliminary compression, if the height of the container part is reduced by removing only the bottom part containing the pre-compressed wood raw material by removing the opening side part of the container part, the subsequent wood raw material softening step In the wood raw material compression step and the wood raw material immobilization step, the height of the heating device and the compression device to be used can be lowered, or the number of wood raw materials that can be processed at the same time can be increased.
[0013]
In the wood raw material softening process, the wooden raw material compression process, and the wooden raw material fixing process, a plurality of container portions and a plurality of presser portions are alternately arranged in a plurality of stages to soften, compress and fix the wooden raw material. It is preferable in terms of efficiency, cost, etc. to perform each of these processes simultaneously in all stages.
[0014]
(2) Next, the mold for producing a wooden product according to the present invention includes a container part having an opening and a bottom, a presser part that can be inserted into the container part from the opening, and wood powder and a small piece of wood in the container part. And a lock mechanism that locks the presser portion in its pressed position when the wood raw material such as wood fiber, bamboo fiber, branches and leaves, and a thin wood plate is filled, and the presser portion is pressed into the container portion and the wooden raw material is compressed.
[0015]
A substrate on which the container portion is placed, and a guide column that guides the movement of the pressing portion when it is pushed by penetrating the guide hole of the extending plate that is suspended from the substrate and extends to the holding portion. Is preferred. In this case, it is more preferable that a support spring for supporting the pressing portion in a floating state above the container portion is interposed between the substrate and the extended plate.
[0016]
The lock mechanism is preferably configured as in the following (1), (2), (3), and (4) in accordance with the above-described configurations.
(1) To be able to change the push-in position that can be locked stepwise or continuously.
(2) Configure so that the presser part is automatically locked at the press-in position only by pressing the presser part. An example of the locking mechanism is a ratchet mechanism.
(3) The presser part is configured to be locked with respect to the guide column.
(4) A ratchet mechanism comprising a groove claw formed on the guide post, a stop claw provided on the presser portion so as to be able to be locked to the groove claw, and an urging spring for urging the stop claw toward the groove claw. about.
The lock mechanism is not limited to the ratchet mechanism, and may be a screw tightening mechanism or a pin insertion mechanism, for example.
[0017]
Moreover, it is preferable that the container portion is divided into an opening-side frame portion and a bottom-side bottomed frame portion, and the frame portion is detachably attached to the bottomed frame portion. In this case, it is preferable to set the height of the bottomed frame portion to 1/4 to 3/4 (more preferably 1/3 to 2/3) with respect to the total height of the bottomed frame portion and the frame portion.
[0018]
It is preferable that the insole part is detachably installed on the inner surface of the bottom of the container part. In this case, it is more preferable to form a hole in the bottom of the container portion for pushing and releasing the insole portion.
[0019]
Moreover, in order to increase the number of the wood raw materials which can be processed simultaneously, it is preferable to comprise as following (a) (b) according to said each structure.
[0020]
(A) By arranging a plurality of container portions and a plurality of presser portions alternately in a plurality of stages, it is configured so that all the presser parts can be simultaneously pushed into the container part. Configure the locking mechanism so that it can be locked simultaneously in the push-in position.
[0021]
(B) The extending plate of the plurality of presser portions is passed through the guide pillar, and a plurality of container portions are placed one by one on each presser portion, so that the plurality of container portions and the plurality of presser portions are alternately arranged. By arranging them in a plurality of stages, it is possible to simultaneously push the pressing parts of all stages into the container part, and to configure a locking mechanism so that the pressing parts of all stages can be simultaneously locked to the pushing position.
[0022]
(3) Furthermore, another method for producing a wooden product according to the present invention uses the production mold of (2) above. In other words, wood raw materials such as wood powder, wood pieces, wood fibers, bamboo fiber, branches and leaves, wood thin plates, etc., to which no adhesive is substantially added, are placed in a heating device, heated in a compressed state, and then cooled. It is a method for fixing to a wooden product in a compressed state, and in the heating device, in addition to the wooden raw material, a container part having an opening and a bottom, and the container part can be inserted from the opening For the production of wood products comprising a presser part and a lock mechanism that locks the presser part into its pressed position when the container part is filled with a wooden raw material and the presser part is pushed into the container part to compress the wooden raw material. This is a method for manufacturing a wooden product, in which a mold is inserted, and a compression device that compresses the wooden raw material by pressing the pressing portion into the container portion is not inserted.
In each of the above inventions, the wood raw material such as wood powder, wood pieces, wood fiber, bamboo fiber, branches and leaves, wood thin plate, etc., if its unit is smaller in size, thickness, etc. The specific shape is not limited, and may be new material, scrap material, or waste material (reuse).
[0023]
The method of filling the woody material is not particularly limited, and one or more kinds of wood powder, wood pieces, wood fiber, bamboo fiber, branches and leaves, etc. are randomly filled, or filled according to a predetermined rule. Examples thereof include a method of laminating or alternately repeating the filling of wood powder, wood pieces, wood fiber, bamboo fiber, branches and leaves and the lamination of wood thin plates.
[0024]
“Substantially no adhesive” means not only when no adhesive is added, but also when adding a small amount of adhesive that does not lose the water absorption characteristic of wood, or when it becomes waste material. This also includes the case where a small amount of adhesive is added to such an extent that no pollution caused by the adhesive occurs.
[0025]
The shape of the wood product to be manufactured is not particularly limited, and examples thereof include a board shape, a column shape, a rod shape, a lump shape, and a three-dimensional shape. Therefore, the shape of the container part and the holding part of the manufacturing mold can be appropriately determined according to the shape of the wooden product. For example, when the wooden product is a wooden board, the container portion of the manufacturing mold is formed in a tray shape, and the presser portion is formed in a lid-shaped presser plate.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention embodied in a wood board manufacturing method and manufacturing mold will be described below with reference to the drawings.
[0027]
First, the manufacturing die 1 of the first embodiment shown in FIGS. 1 to 4 includes a tray-like container part 2 having an opening and a bottom, a presser part 3 that can be inserted into the container part 2 from the opening, and a container part. 2 is filled with wood material such as wood powder, wood pieces, wood fiber, bamboo fiber, branches and leaves, wood sheet, and the presser part 3 is pressed into the container part 2 to compress the wood material. And a locking mechanism 4 that locks in the pushing position. Further, the manufacturing die 1 is provided with a substrate 5 on which the container portion 2 (only the bottomed frame portion 22 from which a frame portion 21 described later is removed) is placed, and is suspended from the substrate 5 and extended to the presser portion 3. Two types of thick and thin guide pillars 8 and 9 are provided to guide the movement of the presser portion 3 when it is pushed by penetrating through the guide holes 7 of the extension plate 6. A positioning means (not shown) for the container part 2 is provided on the substrate 5.
[0028]
The container part 2 and the presser part 3 are made of metal, but are not limited to metal, and may be a heat-resistant hard material such as ceramic.
[0029]
A support spring 10 is interposed between the substrate 5 and the extended plate 6 and around the thin guide column 9 to bias the presser part 3 upward and support it in a floating state above the container part 2. ing. Further, a lock nut 11 is screwed to the upper end portion of the thin guide column 9 so that the position can be adjusted, and the lock nut 11 abuts on the upper surface of the extension plate 6 to regulate the upper limit position of the presser portion 3.
[0030]
The locking mechanism 4 includes a pair of groove claws 16 with a tapered surface 15 formed on a thick guide column 8 and a pivotally supported pivotally mounted on the extension plate 6 of the presser portion 3 so as to be locked to the groove claws 16. As shown in FIG. 3, the ratchet mechanism includes a stop claw 17 and a biasing spring 18 that biases the pair of stop claws 17 toward the groove claw 16. According to the lock mechanism 4, as shown in FIGS. 1 to 2, the presser unit 3 can be automatically locked at the press-in position only by pressing the presser unit 3. In the illustrated example, the groove claw 16 has one stage, but by forming the groove claw 16 in a plurality of stages, the push-in position where the lock can be locked can be changed stepwise.
[0031]
As shown in FIG. 4, the container portion 2 is divided into an opening-side frame portion 21 and a bottom-side bottomed frame portion 22, and a plurality of positioning members 23 attached around the frame portion 21. By holding the bottomed frame part 22, the frame part 21 is detachably attached to the bottomed frame part 22.
[0032]
Further, the container part 2 has the same internal area as the product area in order to make the wood raw material M into a wood board P (product) of a desired size, and is about 5 times (2 to 10 times the product thickness). Preferred)). In this example, since the product thickness is 2 cm, the inner height of the container part 2 is 10 cm. In addition, the height of the bottomed frame portion 22 is about ½ of the total height of the bottomed frame portion 22 and the frame portion 21 (the bottom portion is larger than the inner height). That is, the bottomed frame portion 22 and the frame portion 21 have substantially the same height.
[0033]
On the inner surface of the bottom of the bottomed frame portion 22, a plate-like insole portion 24 is detachably installed. In addition, a hole 25 is formed in the bottom of the bottomed frame portion 22 for pressing and releasing the insole portion 24 with a demolding jig (37).
[0034]
Next, the manufacturing die 1 of the second embodiment shown in FIGS. 5 and 6 is different from the first example only in the following points.
(1) The thick guide pillar 8 is formed long and the extended plates 6 of the plurality of presser portions 3 are passed through the thick guide pillar 8.
{Circle around (2)} Between the substrate 5 and the extended plate 6 of the uppermost presser part 3, the uppermost presser part 3 is urged upward and supported in a floating state above the uppermost container part 2. The support spring 10 is interposed.
(3) Instead of the thin guide column 9 and the lock nut 11, the extension plate of the lower presser portion 3 is extended downward from the extension plate 6 of the upper presser portion 3 in order from the top. 6 is provided, and the lower presser portion 3 is supported in a suspended manner by the support column 26 and a support nut 27 screwed to the lower end portion of the support column 26. By this suspension support, the presser portions 3 in the second and lower stages from above are supported in a floating state above the container parts 2 of the respective stages.
(4) A plurality of container portions 2 (only the bottomed frame portion 22 with the frame portion 21 removed) are placed one by one on each presser portion 3.
With the configurations of (1) to (4), a plurality of container parts 2 and a plurality of presser parts 3 are alternately arranged in a plurality of stages, so that all the presser parts 3 can be pushed into the container part 2 at the same time. I have to.
(5) When the uppermost presser part 3 is pushed down, all the presser parts 3 are pushed down in order, and the pawls 17 of the lock mechanism 4 provided on the uppermost extension plate 6 are provided at one location of the guide column 9. By engaging with the groove claw 16 formed in the above, all the presser portions 3 can be simultaneously locked in the pushing position.
[0035]
Next, the manufacturing die 1 of the third embodiment shown in FIGS. 7 and 8 is different from the first example only in the following points.
(1) Instead of the guide columns 8 and 9, a long formed guide column 28 is suspended from the substrate 5, and the extended plate 6 of the uppermost presser 3 is passed through the guide column 28.
(2) A plurality of container portions 2 and a plurality of presser portions 3 (there is no extended plate 6 except for the uppermost portion) are alternately placed on the substrate 5 and arranged in a plurality of stages. The step retainer 3 can be pushed into the container 2 at the same time.
(3) When the uppermost presser part 3 is pushed down, all the presser parts 3 are pushed down, and when a desired push-in position is reached, tightening as a lock mechanism screwed into the upper end part of the guide column 28 The nut 29 is fastened to the uppermost extension plate 6 so that all the presser portions 3 can be simultaneously locked in the pushing position. In this example, the push-in position that can be locked can be continuously changed by adjusting the tightening nut 29.
[0036]
Next, a method for manufacturing a wooden board using the manufacturing mold 1 will be described with reference to FIGS. 9 and 10 and FIGS. FIG. 10 is a schematic plan view of the manufacturing site, in which 30 is a wood raw material storage place, 31 is a weigh scale, 32 is a free bear table, and 33 is a compression device. Reference numeral 34 denotes a high-temperature high-pressure steam heater, 34a denotes a pressure vessel, and 34b denotes a boiler. 35 is a transport vehicle, 36 is a demolding work place, and 37 is a demolding jig.
[0037]
(1) Wood raw material filling process As shown in FIG. 4B, the frame portion 21 is attached to the bottomed frame portion 22 of the container portion 2, and the insole portion 24 is placed on the bottom of the bottomed frame portion 22. Is installed. In this example, since the wooden raw material M is filled to a height of about 10 cm, the height of the container portion 2 is required up to the upper end of the frame portion 21. If the next preliminary compression is small and the filling height may be about 5 cm, the frame portion 21 does not have to be attached from the time of filling.
As shown to Fig.9 (a), about 10 cm of wood raw materials M, such as a wood powder, a small piece of wood, a wood fiber, a bamboo fiber, a branch leaf, and a timber thin board to which the adhesive agent is not substantially added to the container part 2 from the opening. To the height (in this example, almost full). The wooden raw material M is placed in the wooden raw material storage 30 and is weighed by a weight scale 31.
[0038]
(2) Wood raw material pre-compression step As shown in FIG. 9B, the container 2 filled with the wooden raw material M is set in the compression device 33, and the wooden raw material is about ½ of the height at the time of filling. Pre-compress to a height of about 5 cm. After the preliminary compression, the height of the container part 2 can be reduced to ½ by removing the frame part 21 of the container part 2 and using only the bottomed frame part 22 containing the pre-compressed wood raw material M. For example, in the subsequent wooden raw material softening process, wooden raw material compression process and wooden raw material fixation process, the height of the high-temperature high-pressure steam heating device 34 or the compression device 33 used is reduced or the number of wooden raw materials that can be processed simultaneously is increased. Can be.
[0039]
(3) Manufacturing mold setting process In the case of the first embodiment, as shown in FIG. 1, only the bottomed frame portion 22 of the container portion 2 containing the pre-compressed wood raw material M is placed on the substrate 5. Then, the manufacturing mold 1 is set. At this time, by adjusting the screwing position of the lock nut 11, the vertical position of the presser portion 3 is at a level that does not interfere with the loading (and subsequent unloading) of the bottomed frame portion 22 from the side and as much as possible. It is good to set it to a low level. The locking claw 17 of the locking mechanism 4 is disengaged upward from the groove claw 16.
In the case of the second or third embodiment, as shown in FIG. 5 or FIG. 7, the production die 1 is set as described above. FIG. 9C shows the manufacturing die 1 of the second embodiment set in this way.
[0040]
(4) Wood raw material softening process As shown in FIG. 9 (d), the set manufacturing mold 1 (in the figure, the second embodiment, of course, the first or third embodiment may also be used) Is put in the pressure vessel 34a of the high-temperature and high-pressure steam heating device 34, and the wood raw material M is softened by heating it to 100 ° C. or higher with the high-temperature and high-pressure steam that is packed in the pressure vessel 34a from the boiler 34b.
[0041]
(5) Woody raw material compression step As shown in FIG. 9 (e), the production mold 1 is taken out from the high-temperature and high-pressure steam heating device 34 and set in a compression device 33 (here, a press machine). The presser part 3 of the manufacturing mold 1 inserted through the opening is pressed into the container part 2 to compress the wood raw material M, and each presser part 3 is automatically locked at the press position by the lock mechanism 4. The softened wood material M can be easily deformed and compression-molded when pressure is applied under normal pressure. In this example, the thickness of the wood raw material M after compression is about 2 cm. The first embodiment is in the state of FIG. 2, the second embodiment is in the state of FIG. 6, and the third embodiment is in the state of FIG. The operation of the lock mechanism 4 is as described above.
[0042]
(6) Wood raw material immobilization process As shown in FIG. 9 (f), the production mold 1 is removed from the compression device 33 and is put in the pressure vessel 34a of the high-temperature high-pressure steam heating device 34 together with the locked locking mechanism 4. The wood raw material M in a compressed state is wet-heated to 180 ° C. or higher with high-temperature and high-pressure steam packed in the pressure vessel from the boiler 34b, and is kept in that state for a predetermined time (preferably 10 minutes or longer). After that, if the production mold 1 is taken out from the pressure vessel 34a and cooled (preferably cooled to at least 120 ° C. or less), the wooden raw material M is fixed in a compressed state, and the wooden board P having a thickness of 2 cm is used. It becomes. This cooling may be performed in the pressure vessel 34a, but it is more efficient to carry out the cooling out of the pressure vessel 34a.
[0043]
(7) Wood product demolding process After the manufacturing mold 1 is further cooled at the demolding work place 36 (cooled to a temperature at which the worker can touch it), the lock mechanism 4 is unlocked and the container part 2 is removed. The presser part 3 is lifted and removed, the container part 2 is slid sideways and taken out, and the wood board P is removed from the container part 2 as shown in FIG. At this time, if the insole portion 24 is pushed up from the punched hole 25 with a rod-shaped mold removal jig 37, the mold can be easily removed. Further, if the surface treatment with good peelability such as Teflon coating is performed on the upper surface of the insole portion 24, the lower surface of the presser portion 3, the inner surface of the container portion 2, etc., the demolding becomes easier. After removing the wood board P, the empty container part 2 is returned to the wood raw material filling step which is the starting point of this manufacturing method.
[0044]
As described above, by using the manufacturing die 1 of the present embodiment including the container part 2, the presser part 3, and the lock mechanism 4, the wood raw material softening process, the wooden raw material compression process, and the wooden raw material fixing process are performed. Since the high-temperature and high-pressure steam heating device 34 and the compression device 33 used for these processes can be configured separately, both devices 33 and 34 can be made simple, inexpensive and small. it can. In addition, the operation of the high-temperature and high-pressure steam heating device 34 and the compression device 33 can be simplified in a short time, can be continuous and automated, and productivity is remarkably improved.
[0045]
In addition, this invention is not limited to the said embodiment, For example, it can also be suitably changed and embodied as follows, for example in the range which does not deviate from the meaning of invention.
(1) Instead of the positioning member 23, a positioning concave portion and a positioning convex portion are relatively provided on the lower end surface of the frame portion 21 and the upper end surface of the bottomed frame portion 22, and by fitting these concave portions and convex portions, The frame portion 21 is detachably attached to the bottomed frame portion 22.
(2) A heating device is directly provided on one or both of the container part 2 and the presser part 3.
[0046]
【The invention's effect】
As described above, according to the method for manufacturing a wooden product and the mold for manufacturing according to the present invention, the woody material such as wood powder, wood pieces, wood fiber, bamboo fiber, branch leaf, and wood sheet without substantially adding an adhesive. It is possible to manufacture wood products from raw materials, and not only provide various effects such as maintaining the water absorption of wood, enabling reuse at the time of disposal, eliminating pollution caused by adhesives, and simplifying the manufacture It can be performed efficiently by an inexpensive and small-sized apparatus.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state before compression of a wood board manufacturing mold according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a state after compression of the production mold.
FIG. 3 is a plan view of the manufacturing mold.
4A and 4B are exploded perspective views showing a state before assembly, and FIG. 4B is a perspective view showing a state after assembly.
FIG. 5 is a cross-sectional view showing a state before compression of a wood board manufacturing mold according to a second embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a state after compression of the production mold.
FIG. 7 is a cross-sectional view showing a state before compression of a wood board manufacturing mold according to a third embodiment of the present invention.
FIG. 8 is a cross-sectional view showing a state after compression of the production mold.
FIG. 9 is a schematic explanatory view showing each step in the method for producing a wooden board of the present invention.
FIG. 10 is a schematic plan view of a manufacturing site of the manufacturing method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Manufacturing type | mold 2 Container part 3 Holding part 4 Lock mechanism 5 Board | substrate 6 Extension board 7 Guide hole 8 Thick guide pillar 9 Thin guide pillar 10 Support spring 11 Lock nut 15 Tapered surface 16 Groove claw 17 Stop claw 18 Energizing spring 21 Frame portion 22 Bottomed frame portion 23 Positioning member 24 Sole portion 25 Punch hole 26 Support column 27 Support nut 28 Guide column 29 Tightening nut 33 Compression device 34 High-temperature high-pressure steam heating device 34a Pressure vessel 34b Boiler 37 Demolding jig M Wood material P Wood board

Claims (11)

製造用型の容器部にその開口から接着剤を実質的に添加しない木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等の木質原料を充填する木質原料充填工程と、
前記製造用型を加熱装置に入れ、木質原料を80℃以上に加熱することにより軟化させる木質原料軟化工程と、
前記製造用型を加熱装置から出して圧縮装置にセットし、容器部にその開口から嵌挿した製造用型の押え部を容器部内に押し込んで木質原料を圧縮するとともに、押え部をその押し込み位置にロック機構によりロックする木質原料圧縮工程と、
前記製造用型を圧縮装置から外して前記ロックしたロック機構と共に加熱装置に入れ、圧縮状態の木質原料を180℃以上に加熱してから、前記製造用型を加熱装置中で又は加熱装置から出して冷却することにより木質原料を圧縮状態のままに固定化して木質製品にする木質原料固定化工程と、
前記ロック機構のロックを解除して容器部から押え部を外すとともに木質製品を脱型する木質製品脱型工程と
を含む木質製品の製造方法。
A wood raw material filling process for filling wood raw materials such as wood powder, wood pieces, wood fibers, bamboo fiber, branches and leaves, wood thin plates, etc., in which adhesive is not substantially added to the container part of the production mold,
Putting the production mold into a heating device, and softening the wooden raw material by heating the wooden raw material to 80 ° C. or higher; and
The manufacturing die is taken out of the heating device and set in the compression device, and the pressing portion of the manufacturing die fitted into the container portion through the opening is pressed into the container portion to compress the wood raw material, and the pressing portion is in its pushing position. A wood raw material compression process that is locked by a locking mechanism;
The manufacturing mold is removed from the compression apparatus and placed in a heating apparatus together with the locked locking mechanism. After heating the compressed woody material to 180 ° C. or higher, the manufacturing mold is taken out from the heating apparatus or from the heating apparatus. A wooden raw material fixing process to fix the wooden raw material in a compressed state by cooling it into a wooden product,
A wooden product manufacturing method comprising: releasing the lock of the locking mechanism to remove the presser from the container portion and releasing the wooden product.
前記木質原料充填工程と木質原料軟化工程との間に、「前記製造用型を圧縮装置にセットし、木質原料を予備圧縮する木質原料予備圧縮工程」を含む請求項1記載の木質製品の製造方法。  2. The production of wood products according to claim 1, including a "wood material pre-compression step in which the production mold is set in a compression device and the wood material is pre-compressed" between the wood material filling step and the wood material softening step. Method. 前記予備圧縮後に、容器部の開口側部分を取り外して予備圧縮した木質原料が入っている底側部分だけにすることにより容器部の高さを減少させる請求項2記載の木質製品の製造方法。  3. The method for producing a wooden product according to claim 2, wherein after the preliminary compression, the height of the container portion is reduced by removing the opening side portion of the container portion and using only the bottom side portion containing the pre-compressed wood raw material. 前記木質原料軟化工程、木質原料圧縮工程及び木質原料固定化工程においては、複数の容器部と複数の押え部とを交互にして複数段に配設し、木質原料の軟化、圧縮及び固定化の各処理を全段で同時に行う請求項1、2又は3記載の木質製品の製造方法。  In the wood raw material softening step, the wooden raw material compression step, and the wooden raw material fixing step, a plurality of container portions and a plurality of presser portions are alternately arranged in a plurality of stages to soften, compress and fix the wooden raw material. The method for producing a woody product according to claim 1, 2 or 3, wherein each treatment is performed simultaneously in all stages. 開口及び底の有る容器部と、前記容器部にその開口から嵌挿し得る押え部と、前記容器部に木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等の木質原料を充填し、押え部を容器部内に押し込んで木質原料を圧縮したときに、押え部をその押し込み位置にロックするロック機構とを備えた木質製品の製造用型。  A container part having an opening and a bottom, a presser part that can be inserted into the container part from the opening, and the container part is filled with wood raw materials such as wood powder, small pieces of wood, wood fibers, bamboo fiber, branch leaves, and wood thin plates. A wood product manufacturing die provided with a lock mechanism that locks the presser part into the press position when the presser part is pushed into the container part and the wood raw material is compressed. 前記ロック機構は、ロックできる押し込み位置を段階的又は連続的に変更可能に構成し、押え部を押し込むだけで押え部をその押し込み位置に自動的にロックするように構成した請求項5記載の木質製品の製造用型。The wood structure according to claim 5, wherein the lock mechanism is configured such that a push-down position that can be locked can be changed stepwise or continuously, and the press portion is automatically locked to the push position only by pushing the press portion. Product manufacturing mold. 前記容器部を、開口側の枠部と、底側の有底枠部とに分割構成し、有底枠部に対して枠部を取り外し可能に取り付けた請求項5記載の木質製品の製造用型。  The said container part is divided | segmented into the frame part by the side of an opening, and the bottomed frame part by the side of bottom, The frame part is attached to the bottomed frame part so that removal is possible, For the manufacture of the wooden product Type. 前記容器部の底の内面上に、中敷部を離脱可能に設置した請求項5記載の木質製品の製造用型。  The mold for producing a wooden product according to claim 5, wherein an insole part is detachably installed on the inner surface of the bottom of the container part. 前記容器部の底に、中敷部を押して離脱させるための抜き穴を形成した請求項8記載の木質製品の製造用型。  The mold for manufacturing a wooden product according to claim 8, wherein a hole for pushing and releasing the insole part is formed in the bottom of the container part. 複数の容器部と複数の押え部とを交互にして複数段に配設することにより、全段の押え部を容器部内に同時に押し込めるように構成するとともに、全段の押え部をその押し込み位置に同時にロックできるようにロック機構を構成した請求項5記載の木質製品の製造用型。By arranging a plurality of container parts and a plurality of presser parts alternately in a plurality of stages, it is configured so that all the presser parts can be pushed into the container part at the same time, and all the presser parts are at the pushing position. The mold for producing a wooden product according to claim 5, wherein a lock mechanism is configured so that the lock can be performed simultaneously. 接着剤を実質的に添加しない木材粉、木材小片、木材繊維、竹材繊維、枝葉、木材薄板等の木質原料を加熱装置に入れて圧縮状態で加熱してから冷却することにより木質原料を圧縮状態のままに固定化して木質製品にする方法であって、
前記加熱装置には、前記木質原料の他としては、開口及び底の有る容器部と、前記容器部にその開口から嵌挿し得る押え部と、前記容器部に木質原料を充填し、押え部を容器部内に押し込んで木質原料を圧縮したときに、押え部をその押し込み位置にロックするロック機構とを備えた木質製品の製造用型を入れることとし、前記押え部を容器部内に押し込んで木質原料を圧縮する圧縮装置は入れないこととする木質製品の製造方法。
Wood raw materials such as wood powder, wood chips, wood fibers, bamboo fibers, branches and leaves, and thin wood sheets, to which no adhesive is substantially added, are put into a heating device, heated in a compressed state, and then cooled in a compressed state. It is a method to fix it as it is to make a wooden product,
In the heating device, in addition to the wood raw material, a container part having an opening and a bottom, a presser part that can be inserted into the container part from the opening, a wooden part is filled in the container part, and a presser part is provided. When the wood raw material is compressed by pushing it into the container part, a wood product manufacturing die having a lock mechanism that locks the presser part in its pushing position is inserted, and the wood raw material is pushed into the container part by pushing the presser part into the container part. The manufacturing method of the wooden product which does not put the compression device which compresses.
JP16616398A 1998-05-29 1998-05-29 Wood product manufacturing method and manufacturing mold Expired - Fee Related JP3686757B2 (en)

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