JP3839156B2 - Substrate / sheet integrated molding method - Google Patents

Substrate / sheet integrated molding method Download PDF

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Publication number
JP3839156B2
JP3839156B2 JP05111098A JP5111098A JP3839156B2 JP 3839156 B2 JP3839156 B2 JP 3839156B2 JP 05111098 A JP05111098 A JP 05111098A JP 5111098 A JP5111098 A JP 5111098A JP 3839156 B2 JP3839156 B2 JP 3839156B2
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Prior art keywords
sheet material
sheet
base material
mold
tension
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JPH11245287A (en
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民雄 古屋
賢一 中條
順一 斉田
彰宏 亀島
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26Component parts, details or accessories; Auxiliary operations
    • B29C51/261Handling means, e.g. transfer means, feeding means
    • B29C51/262Clamping means for the sheets, e.g. clamping frames
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/08Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B29C51/082Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/14Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26Component parts, details or accessories; Auxiliary operations
    • B29C51/30Moulds
    • B29C51/32Moulds having cutting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/30Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005Body finishings
    • B29L2031/3008Instrument panels

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は基材にシート材を貼付ける基材・シート一体成形方法に関する。
【0002】
【従来の技術】
図12は従来の基材・シート材一体成形品(車両のインストルメントパネルを例とした)の正面図である。
基材・シート材一体成形品としてのインストルメントパネル100は、計器類や操作スイッチ類を配置するために車両の運転席の前方に配置するパネルであり、向って右側に計器類や操作スイッチ類を取付けるために開けた開口101と、トレーを取付けるために開けた開口102と、この開口102の下方にグローブボックスを取付けるために開けた開口103と、この開口103の左側にデフロスタを取付けるために開けた開口104を備えたものである。
【0003】
図13は図12の13−13線断面図であり、インストルメントパネル100は、シート材106を接着剤107を介して基材108に密着させたものである。なお、シート材106と接着剤107との間にはプライマー(図示しない)が塗布されている。
このインストルメントパネル100は、計器類や操作スイッチ類を取付ける開口101の部位に山形部108a(範囲h1)を備える。この山形部108aがあるために、インストルメントパネル100は、この部分の外形が大きくなり(以下、「大外形部」という)、一端100aから他端100bまでの距離L1が長くなる。
【0004】
図14は図12の14−14線断面図である。
インストルメントパネル100は、グローブボックスを取付ける開口103の部位に平坦部108b(範囲h2)を備える。この平坦部108bがあるために、インストルメントパネル100は、この部分の外形が小さくなり(以下、「小外形部」という)、一端100aから他端100bまでの距離L2は、図13に示す距離L1と比べて短くなる。
【0005】
このインストルメントパネル100を1個づつ成形していたのでは生産性が上がらないので、生産性を上げるために、一例としてインストルメントパネル100を2個同時に成形する方法を採用している。インストルメントパネル100を2個同時に成形する方法を図15(a),(b)で説明する。
【0006】
図15(a),(b)は従来のインストルメントパネル成形方法の説明図であり、(a)は平面図、(b)は(a)のb−b線断面図である。
(a)において、第1・第2基材108,109を互に対向させて雄型110aにセットした後、金型110の左右側に配置した左・右クランプ部材112a,112bでシート材106の左右端を挟込み、このシート材106を型開きした金型110内(雄型110aと雌型110bとの間)に配置し、シート材106をヒータ(図示しない)で加熱して軟化する。
(b)において、金型110を型閉めしてシート材106を第1・第2基材108,109に貼付ける。第1・第2基材108,109にシート材106を同時に貼付けることにより、生産性を高めることができる。
【0007】
ところで、(b)に示すように、金型110を型閉めしてシート材106を第1・第2基材108,109に貼付けるとき、一定の長さのシート材106を金型110で伸ばしながら成形して第1・第2基材108,109に貼付けるので、シート材106が薄くなり品質上好ましくない。
この問題を解消する方法として、例えば特公昭59−15287号公報「合成樹脂シートの絞り加工方法」が提案されており、この技術は、同公報の第4図に示されるとおり、シート1(符号は公報に記載されたものを引用した。以下同じ。)の深絞り部に切込み2…(…は複数個を示す。以下同様。)を形成し、シート1を絞るときに切込み2…を広げることにより、シートに発生する張力を緩和してシート1をあまり伸ばさないようにするものである。このため、シート材の厚さが変らず、製品の品質を良好に保つことができる。
【0008】
【発明が解決しようとする課題】
しかし、第1・第2基材108,109に同時にシート材106を貼付けるとき、図13及び図14で説明したように、第1基材108の山形部108aを備えた部分は大外形部なので端部100a〜端部100b間の距離L1が長くなり、第2基材109の平坦部108bを備えた部分は小外形部なので端部100a〜端部100b間の距離L2が短くなる。すなわち、L1>L2となる。
また、L1×t1=L2×t2の関係からt1<t2となる。
但し、t1:第1基材108に貼付けたシート材106の厚さ
t2:第2基材109に貼付けたシート材106の厚さ
【0009】
このように、外形の大きさが異なる基材にシート材106を貼付けるとき、シート材の厚さは基材の大きさに応じて異なるので、特公昭59−15287号公報「合成樹脂シートの絞り加工方法」のように、シート材に同じ長さのスリットを形成しても、シート材全体の厚さを均一に保つことは難しい。
【0010】
そこで、本発明の目的は、基材に貼付けたシート材を略一定の厚さに保つことができる技術を提供することにある。
【0011】
【課題を解決するための手段】
上記目的を達成するために本発明の請求項1は、シート材を加熱軟化せしめて真空吸引しながら基材に貼付ける基材・シート一体成形方法において、シート材を金型内に配置した後に、シート材に成形張力が発生する時点で、前記シート材のうち、前記金型で成形されない部分で且つ張力の発生部分にスリットを形成せしめ、次に一体化成形を行う基材・シート一体成形方法であって、前記スリットは、前記張力の大きさに対応させてスリットの長さ又はスリットの個数を変えることにより、前記張力を同じ大きさに緩和することを特徴とした。
【0012】
張力の大きさに応じてスリットの長さを決めるようにした。このため、大きい張力が発生する部分に長いスリットを形成し、小さい張力が発生する部分に短いスリットを形成することにより、長いスリットを大きく開いて大きい張力を緩和し、短いスリットを小さく開いて小さい張力を緩和することができる。
また、張力の大きさに応じてスリットの個数を決めるようにした。このため、大きい張力が発生する部分にスリットを多く設け、小さい張力が発生する部分にスリットを少なく設けることにより、大きい張力を多くのスリットで緩和するとともに小さい張力を少ないスリットで緩和することができる。
このため、シート材に大きさの異なる張力がかかっても、張力を略同じ大きさに緩和することができるので、シート材全体の伸びを小さく抑えて、シート材全体を略一定の厚さに保つことができる。
【0013】
また、シート材を金型内にセットした後、シート材にスリットを形成するようにしたので、シート材を金型内に精度よくセットすることができる。このため、シート材をズラさないで基材に貼付けることができる。
【0014】
【発明の実施の形態】
本発明の実施の形態を添付図に基づいて以下に説明する。なお、図面は符号の向きに見るものとする。
図1は本発明に係る基材・シート一体成形品の製造装置(第1実施例)の断面図である。
基材・シート一体成形品の製造装置1は、第1・第2基材2,3にシート材4を貼付けてインストルメントパネルを形成する装置である。
第1基材2は、従来技術で説明した第1基材108と同一部材であり、山形部2aを備えるために、大外形部になり距離L1が長くなる。
第2基材3は、従来技術で説明した第2基材109と同一部材であり、平坦部3bを備えるために、小外形部になり距離L2が短くなる。
また、シート材4は従来技術で説明したシート材106と同一部材である。
【0015】
この基材・シート一体成形品の製造装置1は、雄型(固定型)6及び雌型(可動型)8で構成した金型10と、この金型10の左右側に昇降自在に配置した左・右クランプ12,14と、雌型8の左右側壁に取付けた左・右スリット加工部20,27と、雄型6の左右側壁に取付けた左・右カッタ受部28,29とからなる。なお、左スリット加工部20については図2で詳しく説明する。
雄型6は、第1・第2基材2,3を互に対向させた状態にセットするための型である。雌型8は、金型10を型閉め、型開きするために昇降自在に配置した型である。左・右クランプ12,14は、シート材4の左右端を挟込むことによりシート材6を金型10内に配置可能なものである。
【0016】
図2は本発明に係る基材・シート一体成形品の製造装置(第1実施例)の側面図である。
左スリット加工部20は、雌型8の左側壁に取付けたカッタ支持梁21と、このカッタ支持梁21のカッタ取付溝21a(図1も参照)に取付けたカッタ22とからなる。カッタ22は、カッタ支持梁21に取付ける基部22aと、この基部22aから下方に延びた幅広刃22b…及び幅狭刃22c…とからなる。
【0017】
幅広刃22b…は、第1基材2の山形部2aを含む範囲H1に相当する部分に備えたものであって、刃元長さS1を長く設定したものである。
幅狭刃22c…は、第1基材2の平坦部2bを含む範囲H2に相当する部分に備えたものであって、刃元の長さS2を短く設定したものである。
なお、左スリット加工部20及び右スリット加工部27(図1に示す)は、左右のカッタ22,22の刃形状が異なるだけで、その他は同じ構成部材なので右スリット加工部27の説明を省略する。
【0018】
以上に述べた基材・シート一体成形方法(第1実施例)を次に説明する。
図3(a),(b)は本発明に係る基材・シート一体成形方法(第1実施例)の第1説明図である。
(a)において、雄型6に第1・第2基材2,3をセットする。次に、シート材4の左右端を左・右クランプ12,14で挟込んで、シート材4を型開きした金型10内に配置する。次いで、シート材4を加熱して軟化させた後、左・右クランプ12,14を矢印▲1▼,▲1▼の如く下げる。
(b)において、シート材4を第1・第2基材2,3に被せた状態で、雌型8を矢印▲2▼の如く下げる。
【0019】
図4(a),(b)は本発明に係る基材・シート一体成形方法(第1実施例)の第2説明図である。
(a)において、左・右スリット加工部20,27のカッタ22,22でシート材4の左右端にスリットを形成する。
(b)は、シート材4の範囲H1,H1にカッタ22の幅広刃22b…(図2に示す)で長さS1の長いスリット4a…を形成し、シート材4の範囲H2,H2にカッタ22の幅狭刃22c…(図2に示す)で長さS2の短いスリット4b…を形成した状態を示す。
【0020】
図5(a),(b)は本発明に係る基材・シート一体成形方法(第1実施例)の第3説明図である。
(a)において、雌型8を矢印▲3▼の如く下げることにより、金型10を型閉めしてシート材4を成形するとともに雄型6内に設けた吸引装置(図示しない)で真空引きを行う。
シート材4の裏面にはポリエステル系等のプライマーが塗布され、第1・第2基材2,3の表面には接着剤が塗布されているので、シート材4が第1・第2基材2,3に貼付く。
ここで、山形部2aを備えた第1基材2は大外形部になるので距離L1が長くなり、平坦部3bを備えた第2基材3は小外形部になるので距離L2は短くなる。このため、第1基材2の大外形部に貼付けるシート材4は、第2基材3の小外形部に貼付けるシート材4より伸びが大きくなるので張力が大きくなる。
【0021】
(b)は、範囲H1,H1に形成した長いスリット4a…が大きな張力で開いてE1の幅に広がり、範囲H2,H2に形成した短いスリット4b…が小さな張力で開いてE2の幅に広がった状態を示す。
長いスリット4a…がE1と大きく開くことにより大きな張力を緩和し、短いスリット4b…がE2と小さく開くことにより小さな張力を緩和することができる。
この結果、シート材4の範囲H1,H1及び範囲H2,H2において、シート材4の伸びを略均一に抑えて、シート材4全体を略一定の厚さに保つことができる。
【0022】
また、本発明に係る基材・シート一体成形方法によれば、シート材4を金型10内にセットした後、シート材4に長いスリット4aや短いスリット4bを形成するようにしたので、シート材4を金型10内に精度よくセットすることができる。このため、シート材4をズラさないで基材2,3に貼付けることができるので、基材・シート一体成形品の品質が向上する。
【0023】
次に第2実施例について説明する。なお、第2実施例において第1実施例と同一部材については同一符号を付して説明を省略する。
図6は本発明に係る基材・シート一体成形品の製造装置(第2実施例)の断面図である。
基材・シート一体成形品の製造装置30は、雌型8の左右側壁に左・右案内レール31,32(両方とも奥側は図示しない)を取付け、左・右案内レール31,32に左・右スリット加工部34,36を昇降自在に取付け、左・右スリット加工部34,36を左・右シリンダ40,45(奥側は図示しない)で昇降させる装置である。
【0024】
図7は本発明に係る基材・シート一体成形品の製造装置(第2実施例)の側面図である。
左スリット加工部34は、左案内レール31,31に昇降自在に取付けたカッタ支持梁35と、このカッタ支持梁35のカッタ取付溝35a(図6も参照)に取付けたカッタ22とからなる。
左シリンダ40,40は、シリンダ部41,41をピン42,42を介して雌型8に取付け、ピストンロッド部43,43をピン44,44を介して左スリット加工部34のカッタ支持梁35に取付けたものである。
図6に示す右シリンダ45は、左シリンダ40と同一構成なので同一符号を付して説明を省略する。
【0025】
以上に述べた基材・シート一体成形方法(第2実施例)を次に説明する。
図8(a),(b)は本発明に係る基材・シート一体成形方法(第2実施例)の第1説明図である。
(a)において、雄型6に第1・第2基材2,3をセットする。次に、シート材4の左右端を左・右クランプ12,14で挟込んで、シート材4を型開きした金型10内に配置する。次いで、シート材4を加熱して軟化させた後、左・右クランプ12,14を矢印▲5▼,▲5▼の如く下げる。
(b)において、シート材4を第1・第2基材2,3に被せた状態で、雌型8を矢印▲6▼の如く下げる。
【0026】
図9は(a),(b)は本発明に係る基材・シート一体成形方法(第2実施例)の第2説明図である。
(a)において、左・右スリット加工部34,36のカッタ22,22でシート材4の左右端にスリットを形成する。次に、左・右シリンダ40,45のピストンロッド43,43を後退してカッタ22,22を矢印▲7▼,▲7▼の如く上げる。
(b)は、シート材4の範囲H1,H1にカッタ22の幅広刃22b…(図7に示す)で長さS1の長いスリット4a…を形成し、シート材4の範囲H2,H2にカッタ22の幅狭刃22c…(図7に示す)で長さS2の短いスリット4b…を形成した状態を示す。
【0027】
図10は(a),(b)は本発明に係る基材・シート一体成形方法(第2実施例)の第3説明図である。
(a)において、雌型8を矢印▲8▼の如く下げることにより、金型10を型閉めする。
(b)において、型閉めした金型10でシート材4を成形するとともに雄型6内に設けた吸引装置(図示しない)で真空引きを行う。
シート材4の裏面にはポリエステル系等のプライマーが塗布され、第1・第2基材2,3の表面には接着剤が塗布されているので、シート材4が第1・第2基材2,3に貼付く。
ここで、山形部2aを備えた第1基材2は大外形部になるので距離L1が長くなり、平坦部3bを備えた第2基材3は小外形部になるので距離L2は短くなる。このため、第1基材2の大外形部に貼付けるシート材4は、第2基材3の小外形部に貼付けるシート材4より伸びが大きくなるので張力が大きくなる。
【0028】
図11は本発明に係る基材・シート一体成形方法(第2実施例)の第4説明図である。
シート材4の範囲H1,H1に形成した長いスリット4a…が大きな張力で開いてE3の幅に広がり、範囲H2,H2に形成した短いスリット4b…が小さな張力で開いてE4の幅に広がった状態を示す。
長いスリット4a…がE3と大きく開くことにより範囲H1,H1の大きな張力を緩和し、短いスリット4b…がE4と小さく開くことにより範囲H2,H2の小さな張力を緩和することができる。
この結果、範囲H1,H1及び範囲H2,H2において、シート材4の伸びを略均一に抑えて、シート材4全体を略一定の厚さに保つことができる。
【0029】
第2実施例によればカッタ22,22でシート材4に長いスリット4a…や短いスリット4b…を形成した後、カッタ22,22を上昇させてシート材4から離すことができるので、長いスリット4a…や短いスリット4b…が広がるとき、カッタ22,22が邪魔にならない。このため、長いスリット4a…や短いスリット4b…の両辺が広がるので、長いスリット4a…や短いスリット4b…の広がる量はE3,E4と大きくなる。
これに対して、第1実施例では長いスリット4a…や短いスリット4b…が広がるとき、カッタ22,22が邪魔になるので、長いスリット4a…や短いスリット4b…は片辺のみが広がるだけなので、長いスリット4a…や短いスリット4b…の広がる量E1,E2は、E3,E4と比べて小さい。
このため、第2実施例は、第1実施例と比べてシート材4に発生する張力を大幅に緩和することができる。
【0030】
前記第1、第2実施例では、カッタ22に幅広刃22b…及び幅狭刃22c…を設けてスリットの長さを変える内容について説明したが、これに代えて、カッタ22の刃幅を略同じに設定して刃と刃との間の隙間の大きさを変えることにより同様の効果を得ることができる。
すなわち、例えば図2の範囲H1においてカッタ刃間の隙間を小さく設定し且つ範囲H2においてカッタ刃間の隙間を大きく設定することにより、図4(b)に示すシート材4の範囲H1においてスリットを多く設け且つ範囲H2においてスリットを少なく設けることができる。この結果、第1、第2実施例と同様の効果を得ることができる。
【0031】
【発明の効果】
本発明は上記構成により次の効果を発揮する。
請求項1は、大きい張力が発生する部分に長いスリットを形成し、小さい張力が発生する部分に短いスリットを形成することにより、長いスリットを大きく開いて大きい張力を緩和し、短いスリットを小さく開いて小さい張力を緩和することができる。
また、大きい張力が発生する部分にスリットを多く設け、小さい張力が発生する部分にスリットを少なく設けることにより、大きい張力を多くのスリットで緩和するとともに小さい張力を少ないスリットで緩和することができる。
このため、シート材に大きさの異なる張力がかかっても、張力を略同じ大きさに緩和することができる。この結果、シート材全体の伸びを小さく抑えて、シート材全体を略一定の厚さに保つことができるので、基材・シート一体成形品の品質が向上する。
【0032】
また、シート材を金型内にセットした後、シート材にスリットを形成するようにしたので、シート材を金型内に精度よくセットすることができる。このため、シート材をズラさないで基材に貼付けることができる。この結果、基材・シート一体成形品の品質が向上する。
【図面の簡単な説明】
【図1】本発明に係る基材・シート一体成形品の製造装置(第1実施例)の断面図
【図2】本発明に係る基材・シート一体成形品の製造装置(第1実施例)の側面図
【図3】本発明に係る基材・シート一体成形方法(第1実施例)の第1説明図
【図4】本発明に係る基材・シート一体成形方法(第1実施例)の第2説明図
【図5】本発明に係る基材・シート一体成形方法(第1実施例)の第3説明図
【図6】本発明に係る基材・シート一体成形品の製造装置(第2実施例)の断面図
【図7】本発明に係る基材・シート一体成形品の製造装置(第2実施例)の側面図
【図8】本発明に係る基材・シート一体成形方法(第2実施例)の第1説明図
【図9】本発明に係る基材・シート一体成形方法(第2実施例)の第2説明図
【図10】本発明に係る基材・シート一体成形方法(第2実施例)の第3説明図
【図11】本発明に係る基材・シート一体成形方法(第2実施例)の第4説明図
【図12】従来の基材・シート材一体成形品(車両のインストルメントパネルを例とした)の正面図
【図13】図12の13−13線断面図
【図14】図12の14−14線断面図
【図15】従来のインストルメントパネル成形方法の説明図
【符号の説明】
1,30…基材・シート一体成形品の製造装置、2…第1基材(基材)、3…第2基材(基材)、4…シート材、10…金型、20,34…左スリット加工部、27,36…右スリット加工部、40…左シリンダ、45…右シリンダ。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a base material / sheet integrated molding method for attaching a sheet material to a base material.
[0002]
[Prior art]
FIG. 12 is a front view of a conventional base material / sheet material integrally molded product (a vehicle instrument panel is taken as an example).
An instrument panel 100 as a base material / sheet material integrally molded product is a panel arranged in front of a driver's seat of a vehicle in order to arrange instruments and operation switches, and instruments and operation switches on the right side. An opening 101 for attaching a tray, an opening 102 for attaching a tray, an opening 103 for attaching a glove box below the opening 102, and a defroster on the left side of the opening 103. An opening 104 is provided.
[0003]
13 is a cross-sectional view taken along line 13-13 in FIG. 12, and the instrument panel 100 is obtained by bringing a sheet material 106 into close contact with a base material 108 via an adhesive 107. FIG. A primer (not shown) is applied between the sheet material 106 and the adhesive 107.
The instrument panel 100 includes a chevron 108a (range h1) at a portion of the opening 101 where the instruments and operation switches are attached. Because of the mountain-shaped portion 108a, the instrument panel 100 has a larger outer shape (hereinafter referred to as a “large outer shape portion”), and the distance L1 from the one end 100a to the other end 100b becomes longer.
[0004]
14 is a cross-sectional view taken along line 14-14 of FIG.
The instrument panel 100 includes a flat portion 108b (range h2) at a portion of the opening 103 where the glove box is attached. Because of the flat portion 108b, the instrument panel 100 has a smaller outer shape (hereinafter referred to as “small outer shape portion”), and the distance L2 from one end 100a to the other end 100b is the distance shown in FIG. Shorter than L1.
[0005]
If the instrument panels 100 are molded one by one, productivity does not increase. Therefore, as an example, a method of molding two instrument panels 100 at the same time is employed in order to increase productivity. A method for simultaneously molding two instrument panels 100 will be described with reference to FIGS.
[0006]
FIGS. 15A and 15B are explanatory views of a conventional instrument panel molding method, in which FIG. 15A is a plan view and FIG. 15B is a cross-sectional view taken along line bb in FIG.
In (a), the first and second base materials 108 and 109 are set to the male mold 110 a so as to face each other, and then the sheet material 106 is placed by the left and right clamp members 112 a and 112 b disposed on the left and right sides of the mold 110. The sheet material 106 is placed in a mold 110 (between the male mold 110a and the female mold 110b) that is opened, and the sheet material 106 is heated by a heater (not shown) and softened. .
In (b), the mold 110 is closed and the sheet material 106 is attached to the first and second substrates 108 and 109. Productivity can be improved by sticking the sheet material 106 to the first and second base materials 108 and 109 simultaneously.
[0007]
By the way, as shown in FIG. 5B, when the mold 110 is closed and the sheet material 106 is attached to the first and second base materials 108 and 109, the sheet material 106 having a certain length is removed by the mold 110. Since the sheet material 106 is formed while being stretched and attached to the first and second base materials 108 and 109, the sheet material 106 becomes thin, which is not preferable in terms of quality.
As a method for solving this problem, for example, Japanese Patent Publication No. 59-15287, “Drawing method of synthetic resin sheet” has been proposed, and as shown in FIG. (The same shall apply hereinafter) is formed in the deeply drawn portion of... (... indicates a plurality. The same applies hereinafter), and when the sheet 1 is squeezed, the notches 2 are expanded. Thus, the tension generated in the sheet is relaxed so that the sheet 1 is not stretched so much. For this reason, the thickness of the sheet material does not change, and the quality of the product can be kept good.
[0008]
[Problems to be solved by the invention]
However, when the sheet material 106 is applied to the first and second base materials 108 and 109 at the same time, as described with reference to FIGS. 13 and 14, the portion of the first base material 108 having the chevron 108 a is a large outer shape portion. Therefore, the distance L1 between the end portion 100a and the end portion 100b is increased, and the portion having the flat portion 108b of the second base material 109 is a small external shape portion, so the distance L2 between the end portion 100a and the end portion 100b is decreased. That is, L1> L2.
Further, from the relationship of L1 × t1 = L2 × t2, t1 <t2.
However, t1: thickness of the sheet material 106 affixed to the first base material 108 t2: thickness of the sheet material 106 affixed to the second base material 109
As described above, when the sheet material 106 is pasted on a base material having a different external size, the thickness of the sheet material varies depending on the size of the base material. Even if slits having the same length are formed in the sheet material as in the “drawing method”, it is difficult to keep the thickness of the entire sheet material uniform.
[0010]
Then, the objective of this invention is providing the technique which can keep the sheet | seat material affixed on the base material to substantially constant thickness.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, claim 1 of the present invention is a substrate / sheet integrated molding method in which a sheet material is softened by heating and is vacuum-sucked and then affixed to a substrate, after the sheet material is placed in a mold. , when the molding tension on the sheet material occurs, one of the sheet material, and allowed to form slits in the generation part of the tension, and then the base sheet integrally performing integral molding with no molded portion by the mold In the molding method, the slit is relaxed to the same magnitude by changing the length of the slit or the number of slits according to the magnitude of the tension .
[0012]
The length of the slit was determined according to the magnitude of the tension. For this reason, a long slit is formed in a portion where a large tension is generated, and a short slit is formed in a portion where a small tension is generated. Tension can be relaxed.
In addition, the number of slits was determined according to the magnitude of tension. For this reason, by providing a large number of slits in a portion where a large tension is generated and providing a small number of slits in a portion where a small tension is generated, a large tension can be relaxed by many slits and a small tension can be relaxed by a small number of slits. .
For this reason, even if tensions of different sizes are applied to the sheet material, the tension can be relaxed to substantially the same size, so that the overall elongation of the sheet material is kept small, and the entire sheet material has a substantially constant thickness. Can keep.
[0013]
Further, since the slit is formed in the sheet material after the sheet material is set in the mold, the sheet material can be accurately set in the mold. For this reason, it can affix on a base material, without shifting a sheet material.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a cross-sectional view of a manufacturing apparatus (first embodiment) for a substrate / sheet integrated molded product according to the present invention.
The base material / sheet integrated molded product manufacturing apparatus 1 is an apparatus that forms an instrument panel by attaching a sheet material 4 to first and second base materials 2 and 3.
The first base material 2 is the same member as the first base material 108 described in the prior art, and includes the mountain-shaped portion 2a, so that the first base material 2 becomes a large outer shape portion and the distance L1 becomes long.
The second base material 3 is the same member as the second base material 109 described in the related art, and includes the flat portion 3b, so that the second base material 3 becomes a small outer shape portion and the distance L2 is shortened.
The sheet material 4 is the same member as the sheet material 106 described in the prior art.
[0015]
The base material / sheet integrated product manufacturing apparatus 1 includes a mold 10 composed of a male mold (fixed mold) 6 and a female mold (movable mold) 8, and a mold 10 which is movable up and down on the left and right sides of the mold 10. The left and right clamps 12 and 14, left and right slit processing portions 20 and 27 attached to the left and right side walls of the female die 8, and left and right cutter receiving portions 28 and 29 attached to the left and right side walls of the male die 6. . The left slit processing unit 20 will be described in detail with reference to FIG.
The male mold 6 is a mold for setting the first and second base materials 2 and 3 so as to face each other. The female mold 8 is a mold that is disposed so as to be movable up and down in order to close the mold 10 and open the mold. The left and right clamps 12 and 14 can arrange the sheet material 6 in the mold 10 by sandwiching the left and right ends of the sheet material 4.
[0016]
FIG. 2 is a side view of the manufacturing apparatus (first embodiment) for a base material / sheet integrated molded product according to the present invention.
The left slit processing portion 20 includes a cutter support beam 21 attached to the left side wall of the female die 8 and a cutter 22 attached to a cutter attachment groove 21a (see also FIG. 1) of the cutter support beam 21. The cutter 22 includes a base portion 22a attached to the cutter support beam 21, and a wide blade 22b and a narrow blade 22c extending downward from the base portion 22a.
[0017]
The wide blades 22b are provided in a portion corresponding to the range H1 including the chevron portion 2a of the first base material 2, and have a long blade base length S1.
The narrow blades 22c are provided in a portion corresponding to the range H2 including the flat portion 2b of the first base material 2, and the blade base length S2 is set short.
Note that the left slit processing unit 20 and the right slit processing unit 27 (shown in FIG. 1) are different in the shape of the left and right cutters 22 and 22 and the other components are the same, so the description of the right slit processing unit 27 is omitted. To do.
[0018]
The substrate / sheet integrated molding method (first embodiment) described above will now be described.
3 (a) and 3 (b) are first explanatory views of the substrate / sheet integrated molding method (first embodiment) according to the present invention.
In (a), the first and second substrates 2 and 3 are set on the male mold 6. Next, the left and right ends of the sheet material 4 are sandwiched between the left and right clamps 12 and 14, and the sheet material 4 is placed in the mold 10 that is opened. Next, after the sheet material 4 is heated and softened, the left and right clamps 12 and 14 are lowered as indicated by arrows (1) and (1).
In (b), the female die 8 is lowered as shown by the arrow {circle around (2)} while the sheet material 4 is placed on the first and second substrates 2 and 3.
[0019]
4 (a) and 4 (b) are second explanatory views of the base material / sheet integrated molding method (first embodiment) according to the present invention.
In (a), slits are formed at the left and right ends of the sheet material 4 by the cutters 22 and 22 of the left and right slit processed portions 20 and 27.
(B) shows that the wide slits 22b of the cutter 22 are formed in the ranges H1 and H1 of the sheet material 4 (shown in FIG. 2), and the long slits 4a are formed in the ranges H2 and H2 of the sheet material 4. A state in which the narrow slits 22b of the length S2 are formed by the 22 narrow blades 22c (shown in FIG. 2) is shown.
[0020]
5 (a) and 5 (b) are third explanatory views of the substrate / sheet integrated molding method (first embodiment) according to the present invention.
In (a), the female mold 8 is lowered as shown by the arrow (3), so that the mold 10 is closed to form the sheet material 4 and vacuum is drawn by a suction device (not shown) provided in the male mold 6. I do.
Since a primer such as polyester is applied to the back surface of the sheet material 4 and an adhesive is applied to the surfaces of the first and second substrates 2 and 3, the sheet material 4 becomes the first and second substrates. Affix to 2 and 3.
Here, since the 1st base material 2 provided with the mountain-shaped part 2a becomes a large external shape part, the distance L1 becomes long, and since the 2nd base material 3 provided with the flat part 3b becomes a small external shape part, the distance L2 becomes short. . For this reason, since the sheet material 4 to be attached to the large outer shape portion of the first base material 2 has a larger elongation than the sheet material 4 to be attached to the small outer shape portion of the second base material 3, the tension is increased.
[0021]
In (b), the long slits 4a formed in the ranges H1 and H1 open with a large tension and spread to the width of E1, and the short slits 4b formed in the ranges H2 and H2 open with a small tension and spread to the width of E2. Indicates the state.
The long slits 4a... Can be relieved to have a large tension by opening E1, and the short slits 4b.
As a result, in the ranges H1 and H1 and the ranges H2 and H2 of the sheet material 4, it is possible to keep the sheet material 4 as a whole with a substantially constant thickness by suppressing the elongation of the sheet material 4 substantially uniformly.
[0022]
Further, according to the base material / sheet integrated molding method according to the present invention, since the sheet material 4 is set in the mold 10, the long slit 4 a and the short slit 4 b are formed in the sheet material 4. The material 4 can be accurately set in the mold 10. For this reason, since the sheet | seat material 4 can be affixed on the base materials 2 and 3 without slipping, the quality of a base-material / sheet integral molded product improves.
[0023]
Next, a second embodiment will be described. In addition, in 2nd Example, the same code | symbol is attached | subjected about the same member as 1st Example, and description is abbreviate | omitted.
FIG. 6 is a cross-sectional view of an apparatus for manufacturing a base material / sheet integrated molded product according to the present invention (second embodiment).
The base material / sheet integrated product manufacturing apparatus 30 attaches left and right guide rails 31 and 32 (both of which are not shown) to the left and right side walls of the female mold 8, and the left and right guide rails 31 and 32 have left The right slit processing portions 34 and 36 are mounted so as to be movable up and down, and the left and right slit processing portions 34 and 36 are moved up and down by left and right cylinders 40 and 45 (the back side is not shown).
[0024]
FIG. 7 is a side view of a manufacturing apparatus (second embodiment) of a base material / sheet integrated molded product according to the present invention.
The left slit processing portion 34 includes a cutter support beam 35 attached to the left guide rails 31 and 31 so as to be movable up and down, and a cutter 22 attached to a cutter attachment groove 35a (see also FIG. 6) of the cutter support beam 35.
The left cylinders 40, 40 have cylinder portions 41, 41 attached to the female die 8 via pins 42, 42, and piston rod portions 43, 43 attached to the cutter support beam 35 of the left slit machining portion 34 via pins 44, 44. It is attached to.
Since the right cylinder 45 shown in FIG. 6 has the same configuration as the left cylinder 40, the same reference numerals are given and description thereof is omitted.
[0025]
The substrate / sheet integrated molding method (second embodiment) described above will now be described.
FIGS. 8A and 8B are first explanatory views of the substrate / sheet integrated molding method (second embodiment) according to the present invention.
In (a), the first and second substrates 2 and 3 are set on the male mold 6. Next, the left and right ends of the sheet material 4 are sandwiched between the left and right clamps 12 and 14, and the sheet material 4 is placed in the mold 10 that is opened. Next, after the sheet material 4 is heated and softened, the left and right clamps 12 and 14 are lowered as indicated by arrows (5) and (5).
In (b), the female die 8 is lowered as shown by an arrow (6) in a state where the sheet material 4 is placed on the first and second base materials 2 and 3.
[0026]
FIGS. 9A and 9B are second explanatory views of the substrate / sheet integrated molding method (second embodiment) according to the present invention.
In (a), slits are formed at the left and right ends of the sheet material 4 by the cutters 22 and 22 of the left and right slit processing portions 34 and 36. Next, the piston rods 43 and 43 of the left and right cylinders 40 and 45 are retracted, and the cutters 22 and 22 are raised as indicated by arrows (7) and (7).
(B) shows that the wide slits 22b of the cutter 22 are formed in the ranges H1 and H1 of the sheet material 4 (shown in FIG. 7), and a long slit 4a is formed in the range H2 and H2 of the sheet material 4. 22 shows a state in which the narrow slits 22b of the length S2 are formed by the 22 narrow blades 22c (shown in FIG. 7).
[0027]
10 (a) and 10 (b) are third explanatory views of the substrate / sheet integrated molding method (second embodiment) according to the present invention.
In (a), the mold 10 is closed by lowering the female mold 8 as shown by arrow (8).
In (b), the sheet material 4 is formed with the mold 10 which is closed, and vacuuming is performed by a suction device (not shown) provided in the male mold 6.
Since a primer such as polyester is applied to the back surface of the sheet material 4 and an adhesive is applied to the surfaces of the first and second substrates 2 and 3, the sheet material 4 becomes the first and second substrates. Affix to 2 and 3.
Here, since the 1st base material 2 provided with the mountain-shaped part 2a becomes a large external shape part, the distance L1 becomes long, and since the 2nd base material 3 provided with the flat part 3b becomes a small external shape part, the distance L2 becomes short. . For this reason, since the sheet material 4 to be attached to the large outer shape portion of the first base material 2 has a larger elongation than the sheet material 4 to be attached to the small outer shape portion of the second base material 3, the tension is increased.
[0028]
FIG. 11 is a fourth explanatory view of the substrate / sheet integrated molding method (second embodiment) according to the present invention.
The long slits 4a formed in the ranges H1 and H1 of the sheet material 4 are opened with a large tension and spread to the width of E3, and the short slits 4b formed in the ranges H2 and H2 are opened with a small tension and spread to the width of E4. Indicates the state.
When the long slits 4a... Open greatly to E3, the large tension in the range H1, H1 can be relaxed, and when the short slits 4b.
As a result, in the ranges H1 and H1 and the ranges H2 and H2, it is possible to keep the sheet material 4 as a whole with a substantially constant thickness by suppressing the elongation of the sheet material 4 substantially uniformly.
[0029]
According to the second embodiment, the long slit 4a... And the short slit 4b... Are formed in the sheet material 4 by the cutters 22 and 22, and then the cutters 22 and 22 can be raised and separated from the sheet material 4. When 4a ... and the short slit 4b ... are spread, the cutters 22 and 22 do not get in the way. For this reason, since both sides of the long slit 4a ... and the short slit 4b ... are spread, the amount of spread of the long slit 4a ... and the short slit 4b ... becomes large as E3, E4.
On the other hand, in the first embodiment, when the long slit 4a... Or the short slit 4b... Spreads, the cutters 22 and 22 are in the way, so the long slit 4a. The amount of spread E1, E2 of the long slits 4a and short slits 4b is smaller than that of E3 and E4.
For this reason, the second embodiment can remarkably relieve the tension generated in the sheet material 4 as compared with the first embodiment.
[0030]
In the first and second embodiments, the contents of changing the slit length by providing the cutter 22 with the wide blade 22b... And the narrow blade 22c are described, but instead, the blade width of the cutter 22 is substantially reduced. The same effect can be obtained by setting the same and changing the size of the gap between the blades.
That is, for example, by setting the gap between the cutter blades small in the range H1 in FIG. 2 and setting the gap between the cutter blades large in the range H2, a slit is formed in the range H1 of the sheet material 4 shown in FIG. A large number of slits can be provided in the range H2. As a result, the same effect as in the first and second embodiments can be obtained.
[0031]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
According to the first aspect of the present invention, a long slit is formed in a portion where a large tension is generated, and a short slit is formed in a portion where a small tension is generated. Can relieve small tension.
Further, by providing many slits in a portion where a large tension is generated and providing a small number of slits in a portion where a small tension is generated, a large tension can be relaxed by many slits and a small tension can be relaxed by a small number of slits.
For this reason, even if the tension | tensile_strength from which a magnitude | size differs in a sheet | seat material, tension | tensile_strength can be relieve | moderated to substantially the same magnitude | size. As a result, since the elongation of the entire sheet material can be kept small and the entire sheet material can be kept at a substantially constant thickness, the quality of the base material / sheet integrated molded product is improved.
[0032]
Further, since the slit is formed in the sheet material after the sheet material is set in the mold, the sheet material can be accurately set in the mold. For this reason, it can affix on a base material, without shifting a sheet material. As a result, the quality of the base material / sheet integrated molded product is improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an apparatus for producing a base / sheet integrated molded article according to the present invention (first embodiment). FIG. 2 is a cross-sectional view of an apparatus for manufacturing a base / sheet integrated molded article according to the present invention (first embodiment). FIG. 3 is a first explanatory view of a substrate / sheet integrated molding method according to the present invention (first embodiment). FIG. 4 is a substrate / sheet integrated molding method according to the present invention (first embodiment). FIG. 5 is a third explanatory view of the base material / sheet integrated molding method according to the present invention (first embodiment). FIG. 6 is an apparatus for manufacturing a base material / sheet integrated molded product according to the present invention. Sectional view of (second embodiment) [FIG. 7] Side view of manufacturing apparatus (second embodiment) of base material / sheet integrated molding according to the present invention [FIG. 8] Base material / sheet integral molding according to the present invention FIG. 9 is a first explanatory view of a method (second embodiment). FIG. 9 is a second explanatory view of a substrate / sheet integrated molding method (second embodiment) according to the present invention. FIG. 11 is a fourth explanatory view of the base material / sheet integrated molding method (second embodiment) according to the present invention. FIG. 13 is a cross-sectional view taken along the line 13-13 in FIG. 12. FIG. 14 is a cross-sectional view taken along the line 14-14 in FIG. 15 Illustration of conventional instrument panel forming method 【Explanation of symbols】
DESCRIPTION OF SYMBOLS 1,30 ... Manufacturing apparatus of base-material / sheet integral molded article, 2 ... 1st base material (base material), 3 ... 2nd base material (base material), 4 ... Sheet material, 10 ... Mold, 20, 34 ... left slit machining part, 27, 36 ... right slit machining part, 40 ... left cylinder, 45 ... right cylinder.

Claims (1)

シート材を加熱軟化せしめて真空吸引しながら基材に貼付ける基材・シート一体成形方法において、
シート材を金型内に配置した後に、シート材に成形張力が発生する時点で、前記シート材のうち、前記金型で成形されない部分で且つ張力の発生部分にスリットを形成せしめ、次に一体化成形を行う基材・シート一体成形方法であって、
前記張力の大きさに対応させて前記スリットの長さ又は前記スリットの個数を変えることにより、前記張力を同じ大きさに緩和することを特徴とした基材・シート一体成形方法。
In the base material / sheet integrated molding method in which the sheet material is softened by heating and is applied to the base material while vacuum suctioning,
The sheet material after placement in the mold, when the molding tension on the sheet material occurs, one of the sheet material, and allowed to form slits in the generation part of the tension is not molded parts by the mold, then A base material / sheet integral molding method for performing integral molding,
A base material / sheet integrated molding method characterized by relaxing the tension to the same magnitude by changing the length of the slit or the number of slits in accordance with the magnitude of the tension .
JP05111098A 1998-03-03 1998-03-03 Substrate / sheet integrated molding method Expired - Fee Related JP3839156B2 (en)

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Application Number Priority Date Filing Date Title
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JP3839156B2 true JP3839156B2 (en) 2006-11-01

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CN1280155C (en) * 2000-01-26 2006-10-18 大日本印刷株式会社 heat seal device, ehat seal method, embossing method, work pressing device and work
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