JP2002096379A - Method for molding resin panel - Google Patents
Method for molding resin panelInfo
- Publication number
- JP2002096379A JP2002096379A JP2000290177A JP2000290177A JP2002096379A JP 2002096379 A JP2002096379 A JP 2002096379A JP 2000290177 A JP2000290177 A JP 2000290177A JP 2000290177 A JP2000290177 A JP 2000290177A JP 2002096379 A JP2002096379 A JP 2002096379A
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- mat
- sheets
- heated
- fiber mat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は自動車のボンネッ
ト、ドアパネル、テールゲート、トランクリッド、トラ
ンクボード、リヤパッケージトレー等として用いる樹脂
パネルとその成形方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin panel used as a hood, a door panel, a tailgate, a trunk lid, a trunk board, a rear package tray and the like of an automobile, and a method of molding the same.
【０００２】[0002]
【従来の技術】軽量で錆びることがなくしかも成形が容
易であるなどの利点があるため、従来から樹脂製のボン
ネットやドアパネルが提案され、剛性の高い熱硬化性樹
脂を用いた外板が実際に製造されている。2. Description of the Related Art Resin bonnets and door panels have been proposed because they have the advantages of being lightweight, not rusting, and being easy to mold. It is manufactured in.
【０００３】しかしながら、熱硬化性樹脂は高剛性であ
る反面、リサイクルが困難である。このため、リサイク
ルが可能であるが剛性の低い熱可塑性樹脂を用いたパネ
ルの剛性を高める提案が特開平８−３２３８４２号公報
に開示されている。その内容は、ハニカム構造体を２枚
の樹脂表皮材間に挟んでブロー成形するというものであ
る。[0003] However, thermosetting resins have high rigidity, but are difficult to recycle. For this reason, a proposal for increasing the rigidity of a panel using a thermoplastic resin which is recyclable but has low rigidity is disclosed in JP-A-8-323842. The content is that the honeycomb structure is blow-molded between two resin skin materials.
【０００４】[0004]
【発明が解決しようとする課題】特開平８−３２３８４
２号公報に開示されるパネルは、２枚の樹脂表皮部材を
外表面から加熱するのみであるので、樹脂表皮部材の内
側と外側の温度差が大きくなり賦形性が低下する。ま
た、芯材としているハニカム構造体が加熱されにくいの
で、ハニカム構造体と樹脂表皮部材の密着度が低下する
という問題がある。Problems to be Solved by the Invention
The panel disclosed in Japanese Patent Publication No. 2 only heats the two resin skin members from the outer surface, so that the temperature difference between the inside and the outside of the resin skin member increases, and the shapeability deteriorates. Further, since the honeycomb structure serving as the core material is not easily heated, there is a problem that the degree of adhesion between the honeycomb structure and the resin skin member is reduced.
【０００５】[0005]
【課題を解決するための手段】上述した従来技術の謀題
を解決するため、本発明に係る樹脂パネルの成形方法
は、周縁部をクランプした２枚の熱可塑性樹脂シートを
第１の加熱手段によって加熱軟化せしめ、またこれとは
別の第２の加熱手段によって熱可塑性樹脂繊維または熱
可塑性樹脂をコーティングした繊維からなるマットを加
熱軟化せしめ、次いで、クランプした２枚の熱可塑性樹
脂シートの間に前記マットを臨ませ、この状態で一対の
金型間にセットした後、金型を閉じ金型周縁部で２枚の
熱可塑性樹脂シートとマットとを重ねて熱融着し、また
金型のキャビティ内に位置する２枚の熱可塑性樹脂シー
トの間に外部から高圧気体を供給して熱可塑性樹脂シー
トをキャビティ内面に押し付けて賦形するようにした。SUMMARY OF THE INVENTION In order to solve the above-mentioned problem of the prior art, a method of forming a resin panel according to the present invention comprises the steps of: And a mat made of a thermoplastic resin fiber or a fiber coated with a thermoplastic resin by a second heating means different from the above. Then, the mat is heated and softened. After setting the mat between the pair of molds in this state, the mold is closed, and two thermoplastic resin sheets and the mat are overlapped and heat-sealed at the periphery of the mold. A high-pressure gas is supplied from the outside between two thermoplastic resin sheets located in the cavity, and the thermoplastic resin sheet is pressed against the inner surface of the cavity to be shaped.
【０００６】このように、熱可塑性樹脂シートとは別に
マットを別途加熱することで、マットを構成する熱可塑
性樹脂繊維または熱可塑性樹脂をコーティングした繊維
と熱可塑性樹脂シートとを確実に熱融着せしめることが
できる。As described above, by separately heating the mat separately from the thermoplastic resin sheet, the thermoplastic resin fiber or the fiber coated with the thermoplastic resin constituting the mat and the thermoplastic resin sheet are reliably heat-sealed. I can do it.
【０００７】また、前記熱可塑性樹脂シートと前記繊維
マットを別々に加熱した後、２枚の熱可塑性樹脂シート
間に繊維マットを臨ませた状態で同時に再加熱してもよ
い。このようにすることで、２枚の熱可塑性樹脂シート
と繊維マットを均一に加熱することができる。[0007] After the thermoplastic resin sheet and the fiber mat are separately heated, reheating may be performed simultaneously with the fiber mat facing the two thermoplastic resin sheets. By doing so, the two thermoplastic resin sheets and the fiber mat can be uniformly heated.
【０００８】更に、繊維マットの加熱温度を熱可塑性樹
脂シートの加熱温度よりも高くすることも好ましい。こ
のようにすることで、ヒータによって直接加熱されない
熱可塑性樹脂シートの裏面即ち繊維マットに対向する面
を効果的に加熱することができる。Further, it is preferable that the heating temperature of the fiber mat is higher than the heating temperature of the thermoplastic resin sheet. By doing so, the back surface of the thermoplastic resin sheet that is not directly heated by the heater, that is, the surface facing the fiber mat can be effectively heated.
【０００９】[0009]
【発明の実施の形態】以下に本発明の実施の形態を説明
する。先ず最初に本発明に係る樹脂パネルの成型方法に
て得られた樹脂パネルを図１に基づいて説明すると、樹
脂パネル１は２枚の熱可塑性樹脂シート２，３の間に、
繊維マット４を充填して構成されている。Embodiments of the present invention will be described below. First, a resin panel obtained by the method for molding a resin panel according to the present invention will be described with reference to FIG. 1. The resin panel 1 is provided between two thermoplastic resin sheets 2 and 3.
The fiber mat 4 is filled.
【００１０】前記熱可塑性樹脂シート２，３は、例え
ば、ポリ塩化ビニル、ポリメチルメタクリレート、ポリ
スチレン、ポリプロピレン、ポリカーボネート、ポリエ
チレンテレフタレート、ポリアミド、変性ポリフェニレ
ンオキサイドなどの樹脂からなるが、これらには限定さ
れない。The thermoplastic resin sheets 2 and 3 are made of, for example, resins such as polyvinyl chloride, polymethyl methacrylate, polystyrene, polypropylene, polycarbonate, polyethylene terephthalate, polyamide, and modified polyphenylene oxide, but are not limited thereto.
【００１１】また、繊維マット４を構成する繊維として
は、熱可塑性樹脂繊維若しくはグラスファイバーなどの
繊維の表面に熱可塑性樹脂をコーティングした樹脂ある
いは天然繊維に熱可塑性樹脂繊維を絡み合わせた繊維と
する。そして、繊維マット４を構成する熱可塑性樹脂繊
維もしくは繊維表面の熱可塑性樹脂は熱によって互いに
融着しており、また熱可塑性樹脂シート２，３の内側面
と当該内側面に接触する繊維マット４を構成する繊維も
互いに融着している。The fiber constituting the fiber mat 4 is a resin in which the surface of a fiber such as a thermoplastic resin fiber or a glass fiber is coated with a thermoplastic resin, or a fiber in which a thermoplastic resin fiber is entangled with a natural fiber. . The thermoplastic resin fibers constituting the fiber mat 4 or the thermoplastic resin on the fiber surface are fused to each other by heat, and the inner surfaces of the thermoplastic resin sheets 2 and 3 and the fiber mat 4 contacting the inner surface are bonded. Are also fused to each other.
【００１２】上記の樹脂パネル１はブロー成形にて製造
される。その過程を図２乃至図６に基づいて説明する。
先ず、熱可塑性樹脂シート２、３をブロー成形可能とな
る温度まで加熱する。一方、繊維マット４についても変
形可能となる温度まで加熱する。The above resin panel 1 is manufactured by blow molding. The process will be described with reference to FIGS.
First, the thermoplastic resin sheets 2 and 3 are heated to a temperature at which blow molding can be performed. On the other hand, the fiber mat 4 is also heated to a temperature at which it can be deformed.
【００１３】熱可塑性樹脂シートについては、図２
（ａ）に示すように、枠状のクランパ５で熱可塑性樹脂
シート２を、枠状のクランパ６で熱可塑性樹脂シート３
それぞれクランプし、これらクランプした２枚の熱可塑
性シートを上下のヒータ８，８間に挿入して加熱する。
クランパ５，６は同一寸法の枠形状を有するものであ
る。ヒータ８，８としては例えば近赤外線等の急速加熱
ができるものが好ましい。FIG. 2 shows a thermoplastic resin sheet.
As shown in (a), the thermoplastic resin sheet 2 is framed by the frame-shaped clamper 5 and the thermoplastic resin sheet 3 is framed by the frame-shaped clamper 6.
Each of the clamped thermoplastic sheets is inserted between the upper and lower heaters 8 and heated.
The clampers 5 and 6 have the same frame shape. As the heaters 8, 8, for example, those capable of rapidly heating near infrared rays or the like are preferable.
【００１４】一方、繊維マット４については、図２
（ｂ）に示すように、枠状のクランパ７で繊維マット４
をクランプし、この状態で上下のヒータ８′，８′間に
挿入し、ヒータ８′，８′にて繊維マット４を加熱す
る。クランパ７は、クランパ５，６と同一寸法の枠形状
を有するものである。ヒータ８′，８′としては近赤外
線等の急速加熱ができるものが好ましい。On the other hand, the fiber mat 4 is shown in FIG.
(B) As shown in FIG.
Is clamped, and inserted between the upper and lower heaters 8 ', 8' in this state, and the fiber mat 4 is heated by the heaters 8 ', 8'. The clamper 7 has the same frame shape as the clampers 5 and 6. As the heaters 8 ', 8', those which can rapidly heat near infrared rays or the like are preferable.
【００１５】次いで、図３に示すように、クランプされ
た熱可塑性樹脂シート２とクランプされた熱可塑性樹脂
シート３の間にクランプされた繊維マット４を位置せし
め、この状態で、再度、上下のヒータ８，８間に挿入す
る。このとき、繊維マット４は間接的ではあるが、ヒー
タ８，８にて加熱され、また、熱可塑性樹脂シート２と
熱可塑性樹脂シート３とで形成される密閉された空間に
置かれているので最初の加熱時の温度をほぼ保ってい
る。Next, as shown in FIG. 3, the fiber mat 4 clamped between the clamped thermoplastic resin sheet 2 and the clamped thermoplastic resin sheet 3 is positioned. It is inserted between the heaters 8,8. At this time, the fiber mat 4 is indirectly heated by the heaters 8 and 8 and is placed in a closed space formed by the thermoplastic resin sheet 2 and the thermoplastic resin sheet 3. The temperature during the first heating is almost maintained.
【００１６】そして、ヒータ８，８にて熱可塑性樹脂シ
ート２、３を加熱しブロー成形可能な状態まで軟化せし
めたら、図４に示すように熱可塑性樹脂シート２、３及
びこれらの間に挿入された繊維マット４をブロー成形用
の上下の金型９，１０間にセットする。Then, when the thermoplastic resin sheets 2 and 3 are heated by the heaters 8 and softened until blow molding is possible, as shown in FIG. 4, the thermoplastic resin sheets 2 and 3 are inserted between them. The fiber mat 4 thus set is set between the upper and lower molds 9 and 10 for blow molding.
【００１７】次いで、図５に示すように上下の金型９，
１０を閉じる。すると、金型周縁部で熱可塑性樹脂シー
ト２、３と繊維マット４は重ねてプレスされー体化し、
その内側では金型キャビティ１１の形状に倣って成形さ
れる。なお、熱可塑性樹脂シート２、３と繊維マット４
の成形前のトータル厚みを金型キャビティ１１の厚み寸
法より大きくしておくことで、確実に金型キャビティ１
１の形状に倣った製品が得られる。Next, as shown in FIG.
Close 10. Then, the thermoplastic resin sheets 2 and 3 and the fiber mat 4 are overlapped and pressed at the periphery of the mold to form a body.
Inside it, it is molded according to the shape of the mold cavity 11. In addition, the thermoplastic resin sheets 2 and 3 and the fiber mat 4
By making the total thickness of the mold cavity before molding larger than the thickness dimension of the mold cavity 11, the mold cavity 1
A product following the shape of No. 1 is obtained.
【００１８】ここで、下型１０には圧縮空気供給通路１
２が形成され、この供給通路１２につながるニードル１
３がキャビティ面から突出している。したがって上下の
金型９，１０を閉じた際に、ニードル１３は熱可塑性樹
脂シート３を突き破って繊維マットの４の部分まで侵入
する。そこで、ニードル１３を介して圧縮空気を吹き込
む。すると、熱可塑性樹脂シート２，３は上下の金型
９，１０のキャビティ面に押し付けられ、金型キャビテ
ィ形状に正確に倣った製品が得られる。Here, the lower mold 10 has a compressed air supply passage 1.
The needle 1 connected to the supply passage 12 is formed.
3 project from the cavity surface. Therefore, when the upper and lower molds 9 and 10 are closed, the needle 13 breaks through the thermoplastic resin sheet 3 and penetrates into the fiber mat 4. Therefore, compressed air is blown through the needle 13. Then, the thermoplastic resin sheets 2 and 3 are pressed against the cavity surfaces of the upper and lower molds 9 and 10, and a product that accurately follows the mold cavity shape is obtained.
【００１９】前記ニードル１３はシートに穴を開けるた
め、製品の裏側面を成形する金型に設けることが好まし
い。またニードル１３の本数は複数本でもよく、複数本
のニードルを用いて冷却エアの吹き込みと排出を行うこ
とで内部冷却効果を高め、製品の払い出しサイクルを短
くすることが可能となる。The needle 13 is preferably provided in a mold for molding the back surface of the product in order to make a hole in the sheet. Further, the number of the needles 13 may be plural, and by blowing and discharging the cooling air using the plural needles, the internal cooling effect can be enhanced and the product dispensing cycle can be shortened.
【００２０】この後、図６に示すように、離型して製品
を取り出し、周縁部をカットするとともにバリ取り及び
必要な個所に穴あけを行って、図１に示した樹脂パネル
１を得る。Thereafter, as shown in FIG. 6, the product is taken out by releasing the mold, the peripheral edge is cut, and deburring and drilling are performed at necessary places to obtain the resin panel 1 shown in FIG.
【００２１】なお、繊維マット４単体の加熱温度として
は、熱可塑性樹脂シート２、３がブロー成形可能となる
ような温度よりも高い温度に設定してもよい。これによ
り、再加熱の際、熱可塑性樹脂シート２，３の繊維マッ
ト４に臨む面も同時に加熱されるので加熱効率が高くな
る。The heating temperature of the fiber mat 4 alone may be set higher than the temperature at which the thermoplastic resin sheets 2 and 3 can be blow-molded. Thereby, at the time of reheating, the surfaces of the thermoplastic resin sheets 2 and 3 facing the fiber mat 4 are simultaneously heated, so that the heating efficiency is increased.
【００２２】また、上述の実施の形態において、熱可塑
性樹脂シート２、３と繊維マット４を、熱可塑性樹脂シ
ート２、３がブロー成形可能となるような温度にした
後、熱可塑性樹脂シート２と熱可塑性樹脂シート３の間
に繊維マット４を位置せしめ、この状態で、再度、加熱
する場合について説明した。しかし、図２（ａ），
（ｂ）に示す最初の加熱の後、熱可塑性樹脂シート２、
３及び繊維マット４を工程上迅速にブロー成形用の金型
９，１０セットできるのであれば再度の加熱は省略して
もかまわない。In the above-described embodiment, the thermoplastic resin sheets 2 and 3 and the fiber mat 4 are heated to a temperature at which the thermoplastic resin sheets 2 and 3 can be blow-molded. The case where the fiber mat 4 is positioned between the sheet and the thermoplastic resin sheet 3 and heating is performed again in this state has been described. However, FIG.
After the first heating shown in (b), the thermoplastic resin sheet 2,
If the mold 3 and the fiber mat 4 can be set quickly in the process, the molds 9 and 10 for blow molding can be omitted.
【００２３】[0023]
【発明の効果】以上に説明したように本発明に係る樹脂
パネルの成形方法によれば、２枚の熱可塑性樹脂シート
と繊維マットをそれぞれ独立して加熱するので、繊維マ
ットを好適な条件に加熱でき、これにより繊維マットと
２枚の熱可塑性樹脂の密着性を向上させることができ、
樹脂パネルの剛性を高めることができる。また、独立し
て加熱するので加熱時間が短縮でき、この分、効率よく
樹脂パネルを形成することができる。As described above, according to the method for forming a resin panel according to the present invention, the two thermoplastic resin sheets and the fiber mat are independently heated, so that the fiber mat can be formed under suitable conditions. Can be heated, thereby improving the adhesion between the fiber mat and the two thermoplastic resins,
The rigidity of the resin panel can be increased. In addition, since the heating is performed independently, the heating time can be shortened, and the resin panel can be efficiently formed.
【００２４】前記繊維マットを可塑性樹脂繊維または熱
可塑性樹脂をコーティングした繊維からなるマットとし
たので、これらの熱可塑性樹脂の溶融状態を適切にコン
トロールして２枚の熱可塑性樹脂シート間に臨ませるこ
とで接着剤を用いずとも２枚の熱可塑性樹脂シートとマ
ットを強固に接着できる。Since the fiber mat is a mat made of a thermoplastic resin fiber or a fiber coated with a thermoplastic resin, the molten state of the thermoplastic resin is appropriately controlled so as to reach between two thermoplastic resin sheets. Thereby, the two thermoplastic resin sheets and the mat can be firmly bonded without using an adhesive.
【図１】本発明に係る樹脂パネルの成形方法で得た樹脂
パネルの断面図FIG. 1 is a cross-sectional view of a resin panel obtained by a method of forming a resin panel according to the present invention.
【図２】（ａ）は樹脂シートを加熱している図、（ｂ）
は繊維マットを加熱している図FIG. 2A is a diagram in which a resin sheet is heated, and FIG.
Is heating the fiber mat
【図３】樹脂シートと繊維マットを積層して再加熱する
工程の断面図FIG. 3 is a cross-sectional view of a step of laminating a resin sheet and a fiber mat and reheating.
【図４】再加熱した樹脂シートと繊維マットの積層物を
金型間にセットした状態を示す断面図FIG. 4 is a cross-sectional view showing a state in which a reheated resin sheet / fiber mat laminate is set between molds.
【図５】ブロー成形状態を示す断面図FIG. 5 is a sectional view showing a blow molding state.
【図６】離型状態を示す断面図FIG. 6 is a cross-sectional view showing a release state.
１…樹脂パネル、２，３…熱可塑性樹脂シート、４…繊
維マット、５、６，７…クランパ、８，８′…ヒータ、
９，１０…金型、１１…キャビティ、１２…圧縮空気供
給通路、１３…ニードル。DESCRIPTION OF SYMBOLS 1 ... resin panel, 2, 3 ... thermoplastic resin sheet, 4 ... fiber mat, 5, 6, 7 ... clamper, 8, 8 '... heater,
9, 10: mold, 11: cavity, 12: compressed air supply passage, 13: needle.
Claims (3)
脂シートを第１の加熱手段によって加熱軟化せしめ、ま
た第２の加熱手段によって熱可塑性樹脂繊維または熱可
塑性樹脂をコーティングした繊維からなるマットを加熱
軟化せしめ、次いで、クランプした２枚の熱可塑性樹脂
シートの間にマットを臨ませ、この状態で一対の金型間
にセットした後、前記一対の金型を閉じ金型周縁部で２
枚の熱可塑性樹脂シートとマットとを重ねて熱融着せし
めるとともに、金型のキャビティ内に位置する２枚の熱
可塑性樹脂シート間に外部から高圧気体を供給して熱可
塑性樹脂シートをキャビティ内面に押し付けて賦形する
ことを特徴とする樹脂パネルの成形方法。1. A mat made of thermoplastic resin fibers or thermoplastic resin-coated fibers, wherein two thermoplastic resin sheets whose peripheral edges are clamped are heated and softened by a first heating means, and are heated and softened by a second heating means. Is heated and softened, and then a mat is exposed between the two clamped thermoplastic resin sheets. In this state, the mat is set between a pair of molds.
The two thermoplastic resin sheets and the mat are overlapped and heat-sealed, and a high-pressure gas is supplied from the outside between the two thermoplastic resin sheets located in the cavity of the mold so that the thermoplastic resin sheet is placed inside the cavity. A method for forming a resin panel, wherein the resin panel is shaped by pressing the resin panel.
において、前記熱可塑性樹脂シートと前記繊維マットを
別々に加熱した後、２枚の熱可塑性樹脂シート間に繊維
マットを臨ませた状態で同時に再加熱し、この後、２枚
の熱可塑性樹脂シートと繊維マットを金型間にセットす
ることを特徴とする樹脂パネルの成形方法。2. The method for forming a resin panel according to claim 1, wherein the thermoplastic resin sheet and the fiber mat are separately heated, and then the fiber mat is faced between the two thermoplastic resin sheets. And simultaneously setting the two thermoplastic resin sheets and the fiber mat between the molds.
において、前記繊維マットの加熱温度を熱可塑性樹脂シ
ートの加熱温度よりも高くしたことを特徴とする樹脂パ
ネルの成形方法。3. The method for molding a resin panel according to claim 1, wherein a heating temperature of the fiber mat is higher than a heating temperature of the thermoplastic resin sheet.
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| JP2000290177A JP4278849B2 (en) | 2000-09-25 | 2000-09-25 | Molding method of resin panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000290177A JP4278849B2 (en) | 2000-09-25 | 2000-09-25 | Molding method of resin panel |
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| Publication Number | Publication Date |
|---|---|
| JP2002096379A true JP2002096379A (en) | 2002-04-02 |
| JP4278849B2 JP4278849B2 (en) | 2009-06-17 |
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|---|---|---|---|
| JP2000290177A Expired - Fee Related JP4278849B2 (en) | 2000-09-25 | 2000-09-25 | Molding method of resin panel |
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| JP2008526307A (en) * | 2004-12-30 | 2008-07-24 | ナイキ・インコーポレーテッド | Method for thermoforming a fluid filled bladder |
| WO2009136489A1 (en) * | 2008-04-30 | 2009-11-12 | キョーラク株式会社 | Core material for sandwich panel, method of molding core material for sandwich panel, sandwich panel, and method of molding sandwich panel |
| WO2010050242A1 (en) * | 2008-10-31 | 2010-05-06 | キョーラク株式会社 | Sandwich panel, method of forming core material for sandwich panel, and method of forming sandwich panel |
| EP2722154A1 (en) * | 2012-10-19 | 2014-04-23 | Dr. Doll Holding GmbH | Deep-drawn hollow plastic bodies and method for producing the same |
-
2000
- 2000-09-25 JP JP2000290177A patent/JP4278849B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008526307A (en) * | 2004-12-30 | 2008-07-24 | ナイキ・インコーポレーテッド | Method for thermoforming a fluid filled bladder |
| WO2009136489A1 (en) * | 2008-04-30 | 2009-11-12 | キョーラク株式会社 | Core material for sandwich panel, method of molding core material for sandwich panel, sandwich panel, and method of molding sandwich panel |
| US9981443B2 (en) | 2008-04-30 | 2018-05-29 | Kyoraku Co., Ltd. | Core material for sandwich panel, method of molding core material for sandwich panel, sandwich panel, and method of molding sandwich panel |
| US10112361B2 (en) | 2008-04-30 | 2018-10-30 | Kyoraku Co., Ltd. | Core material for sandwich panel, method of molding core material for sandwich panel, sandwich panel, and method of molding sandwich panel |
| WO2010050242A1 (en) * | 2008-10-31 | 2010-05-06 | キョーラク株式会社 | Sandwich panel, method of forming core material for sandwich panel, and method of forming sandwich panel |
| CN102202881A (en) * | 2008-10-31 | 2011-09-28 | 京洛株式会社 | Sandwich panel, method of forming core material for sandwich panel, and method of forming sandwich panel |
| JP5532522B2 (en) * | 2008-10-31 | 2014-06-25 | キョーラク株式会社 | Sandwich panel, sandwich panel core molding method, and sandwich panel molding method |
| US9283895B2 (en) | 2008-10-31 | 2016-03-15 | Kyoraku Co., Ltd. | Sandwich panel, method of forming core material for sandwich panel, and method of forming sandwich panel |
| EP2722154A1 (en) * | 2012-10-19 | 2014-04-23 | Dr. Doll Holding GmbH | Deep-drawn hollow plastic bodies and method for producing the same |
| US9676516B2 (en) | 2012-10-19 | 2017-06-13 | Dr. Doll Holding Gmbh | Thermoformed hollow plastic body and method for producing it |
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| Publication number | Publication date |
|---|---|
| JP4278849B2 (en) | 2009-06-17 |
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