JPH10109368A - Joining method of corrugated plastic board - Google Patents
Joining method of corrugated plastic boardInfo
- Publication number
- JPH10109368A JPH10109368A JP8283433A JP28343396A JPH10109368A JP H10109368 A JPH10109368 A JP H10109368A JP 8283433 A JP8283433 A JP 8283433A JP 28343396 A JP28343396 A JP 28343396A JP H10109368 A JPH10109368 A JP H10109368A
- Authority
- JP
- Japan
- Prior art keywords
- hot plate
- joining
- cardboard
- corrugated
- heating
- 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
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Making Paper Articles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、プラスチック段ボ
ールの接合に関するものである。The present invention relates to the joining of plastic cardboard.
【０００２】[0002]
【従来の技術】工業用部品の輸送箱や保管箱などに広く
使用されるプラスチック段ボールには、一般にポリプロ
樹脂が使われているが、その物性上、接着による接合が
困難なため、鋲やステップルによる接合や、熱溶着によ
る接合が一般的であった。2. Description of the Related Art Polypropylene resin is generally used for plastic cardboard, which is widely used for transport boxes and storage boxes for industrial parts. However, due to its physical properties, it is difficult to join it by bonding. Joining by heat welding and joining by heat welding were common.
【０００３】[0003]
【発明が解決しようとする課題】しかし、中空構造の段
ボールは局部的に加圧すると潰れやすいので、鋲やステ
ップルなどによる接合を複数箇所に分散して使用しない
と、接合強度を確保することが困難であった。また、金
属製の鋲やステップルは使用済み製品のリサイクルや廃
材処理に不都合であり、一方、樹脂製の鋲は作業工程や
強度の面から原価高になるなどの問題があった。また、
超音波振動による摩擦熱で接合面を溶かして接合する熱
溶着や、加熱した金属片を段ボールの外面から押し当て
て接合面を溶かして接合する熱溶着の方法では、加熱の
際に加えられる圧力によって、軟化した接合面が押し潰
されて、段ボールを構成するシートの肉厚が、接合した
部分と、溶けただけで接合しなかった部分との境界で最
も薄くなり、局部的な引き剥がしの外力が加わると、こ
の部分から比較的簡単に引き裂かれてしまう欠点があっ
た。また、接合するものが中空構造の段ボールであるた
めに、加熱用金属片や超音波振動子を押し当てて加熱す
ると、段ボールの外面に大きな凹みができて外観を損ね
るなどの問題があった。However, since corrugated cardboard having a hollow structure tends to be crushed when locally pressurized, it is necessary to disperse and use joints such as studs and staples at a plurality of locations to secure joint strength. It was difficult. Also, metal studs and staples are inconvenient for recycling of used products and disposal of waste materials, while resin studs have a problem in that the cost is increased in terms of work process and strength. Also,
In the thermal welding method, in which the joining surfaces are melted and joined by frictional heat generated by ultrasonic vibration, or the heat welding method in which a heated metal piece is pressed against the outer surface of the cardboard to melt and join the joining surfaces, the pressure applied during heating As a result, the softened joint surface is crushed, and the thickness of the sheet constituting the corrugated cardboard becomes the thinnest at the boundary between the joined portion and the portion that was melted but not joined, resulting in local peeling. When an external force is applied, there is a disadvantage that the portion is relatively easily torn. In addition, since the object to be bonded is a corrugated cardboard having a hollow structure, there is a problem in that when a metal piece for heating or an ultrasonic vibrator is pressed against and heated, a large dent is formed on the outer surface of the corrugated cardboard and the appearance is impaired.
【０００４】本発明は、上記の点に鑑みてなされたもの
で、外観を損ねることなく、充分な強度を有する接合方
法を提供するものである。[0004] The present invention has been made in view of the above points, and provides a bonding method having sufficient strength without impairing the appearance.
【０００５】[0005]
【課題を解決するための手段】本発明の接合方法は、接
合面を溶かして張り合わせる熱溶着の方法で、熱溶着を
する段ボールの表面を熱板で加熱する際に、接合面に対
して熱板を接触させること以上に押しつけないように、
熱板の近傍に加圧を抑制するための間隔板を挟んで接合
面を加熱し溶かした後、熱板と間隔板を取り除き、熱板
に引き続き付着していようとする溶けた樹脂の粘着力
と、加熱による局部的な熱膨張で段ボールを膨らませ、
溶けて突出した双方の接合面を密着させて熱溶着で接合
することを特徴としている。SUMMARY OF THE INVENTION A joining method according to the present invention is a method of heat welding in which a joining surface is melted and adhered. Do not press more than contacting the hot plate,
After heating and melting the joint surface with a spacing plate to suppress pressure near the hot plate, the hot plate and the spacing plate are removed, and the adhesive strength of the melted resin that will continue to adhere to the hot plate And expand the cardboard by local thermal expansion by heating,
It is characterized in that the two joining surfaces that are melted and projected are brought into close contact and joined by thermal welding.
【０００６】[0006]
【効果】本発明による段ボールの接合方法では、段ボー
ル以外の異種材料を使用しないので、リサイクルや使用
済み製品の廃材処理に都合がよいこと、超音波振動子
や、加熱した金属片を外面から押し当てて熱溶着する方
法に比べ、加熱中に接合面に圧力を加えないから、接合
面が押し潰されて薄くなる恐れがなく、強度をより確実
に確保できること、外観的にも優れていることなどの利
点がある。なお、間隔板がないと熱板が接合面に押し付
けられて、段ボールが溶けて厚みが薄くなり、熱板を取
り除いた後に熱膨張と粘着力で溶けた接合面が膨らんで
も、元の段ボールの面よりも膨らむことが少なくなり熱
溶着が不完全な接合になる。[Effect] In the method for bonding cardboard according to the present invention, since different materials other than cardboard are not used, it is convenient for recycling and waste material treatment of used products. Since no pressure is applied to the joint surface during heating compared to the method of applying heat and welding, there is no danger that the joint surface will be crushed and thinned, strength can be secured more reliably, and appearance is excellent. There are advantages such as. In addition, if there is no spacing plate, the hot plate is pressed against the joint surface, the cardboard melts and the thickness becomes thin, and even if the joint surface melted by thermal expansion and adhesive force after removing the hot plate expands, the original cardboard The swelling is less than that of the surface, and the heat welding is incomplete.
【０００７】[0007]
【発明の実施の形態】以下、本発明の実施例を図面に基
づいて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【０００８】図１は本発明の接合方法を説明するための
段ボール接合部分の斜視図で、接合する段ボール甲１と
段ボール乙２は、上シート１ａ、２ａと下シート１ｂ、
２ｂ、が多数の支え３で所定の間隔を保つ中空構造で形
成されている。４は接合するために段ボール甲１と段ボ
ール乙２が重なった接合面である。FIG. 1 is a perspective view of a cardboard joint portion for explaining a joining method according to the present invention. A cardboard upper 1 and a cardboard board 2 to be joined are composed of upper sheets 1a, 2a and lower sheets 1b,
2b is formed in a hollow structure which keeps a predetermined interval by a large number of supports 3. Numeral 4 is a joint surface where the cardboard upper 1 and the cardboard 2 are overlapped for joining.
【０００９】図２は従来的な超音波振動などによる熱溶
着の接合状態を示す断面図で、接合する段ボール甲１の
下シート１ｂと段ボール乙２の上シート２ａの接触面を
超音波振動の摩擦熱で溶融させて接合するものである。
段ボールの外面から圧力を加えながら熱溶着する方法で
あるため、熱で溶けた下シート１ｂと、上シート２ａが
押し潰され、接合した部分と溶けただけで接合しなかっ
た部分との境界が最も薄くなって強度低下の原因とな
る。また、熱で軟化した接合面を超音波振動子で押さえ
付けるので段ボール自体に大きな凹みができる。FIG. 2 is a cross-sectional view showing a conventional heat welding joining state by ultrasonic vibration or the like. The contact surface between the lower sheet 1b of the corrugated board 1 and the upper sheet 2a of the corrugated board 2 to be joined is subjected to ultrasonic vibration. It is melted by frictional heat and joined.
Since the method is heat welding while applying pressure from the outer surface of the corrugated cardboard, the boundary between the lower sheet 1b melted by heat and the upper sheet 2a is crushed, and the joined portion is melted but not joined. It becomes the thinnest and causes a decrease in strength. Further, since the bonding surface softened by heat is pressed by the ultrasonic vibrator, a large dent is formed in the cardboard itself.
【００１０】図３は本発明による接合方法の最初の段階
を示すもので、先ず接合面となる段ボール甲１と段ボー
ル乙２の相互間に熱板５を挟み接合面を溶かす。間隔板
６は熱板５が接合面に接触すること以上に押しつけられ
ないように、加圧を抑制するためのもので、熱板５とほ
ぼ同じ厚みを持ち、熱板５の近傍の同一平面に設けられ
て熱板５の加熱工程と連動するように、共に支持体７に
連結している。FIG. 3 shows the first stage of the joining method according to the present invention. First, a hot plate 5 is sandwiched between a corrugated board 1 and a corrugated cardboard 2 to be joined, and the joined face is melted. The spacing plate 6 is for suppressing the pressure so that the hot plate 5 is not pressed more than the contact with the joining surface, and has substantially the same thickness as the hot plate 5 and is in the same plane near the hot plate 5. And is connected to the support 7 so as to interlock with the heating step of the hot plate 5.
【００１１】次に図４の如く接合面４相互の間隔を少し
広げた後、支持体７を操作して熱板５と間隔板６を取り
除くと、熱板５に付着してついて行こうとする溶けた樹
脂の粘着力と、局部的な熱膨張によって、下シート１ｂ
と上シート２ａは、加熱されない部分の表面よりも僅か
に膨れ上がった状態になる。次に溶けた下シート１ｂと
上シート２ａを密着させて熱溶着すると接合が完了す
る。間隔板６は熱板５からの熱が直接伝わらないよう
に、熱板から断熱された近傍に設けられる。図５は本発
明の接合方法によって接合した段ボールの断面図で、接
合面が押し潰されて薄くなることがなく、段ボールの外
面にも凹みができない。Next, as shown in FIG. 4, after slightly widening the distance between the joining surfaces 4, the support plate 7 is operated to remove the hot plate 5 and the space plate 6, so that the melt adheres to the hot plate 5 and follows. The lower sheet 1b is formed by the adhesive force of the resin and the local thermal expansion.
Then, the upper sheet 2a is in a state of being slightly swollen than the surface of the portion not heated. Next, when the melted lower sheet 1b and upper sheet 2a are brought into close contact with each other and thermally welded, the joining is completed. The spacing plate 6 is provided in the vicinity insulated from the hot plate so that heat from the hot plate 5 is not directly transmitted. FIG. 5 is a cross-sectional view of a cardboard bonded by the bonding method of the present invention. The bonded surface is not crushed and becomes thin, and the outer surface of the cardboard cannot be dented.
【００１２】以上の如く本発明の接合方法では、接合面
４の相互間に熱板５と共に間隔板６を挟み込んで、接合
面の表面を溶かした後、一旦、接合面相互の間隔を広げ
て熱板５と間隔板６を取り除き、次に双方の接合面４を
密着させて熱溶着する接合方法なので、加熱の際に接合
面が押し潰されて強度が低下するようなことがなく、ま
た、段ボールの外面に加熱に伴う凹みができて外観を損
ねるようなこともないなどの利点がある。As described above, according to the joining method of the present invention, the spacing plate 6 is sandwiched between the joining surfaces 4 together with the hot plate 5 to melt the surfaces of the joining surfaces, and then temporarily increase the spacing between the joining surfaces. The joining method involves removing the hot plate 5 and the spacing plate 6 and then bringing both joining surfaces 4 into close contact with each other and performing heat welding, so that the joining surfaces are not crushed during heating and the strength is not reduced. In addition, there is an advantage that the outer surface of the corrugated cardboard does not have a dent due to heating and does not impair the appearance.
【００１３】[0013]
【図１】プラスチック段ボールの接合状態を説明するた
めの斜視図である。FIG. 1 is a perspective view for explaining a joined state of plastic cardboard.
【図２】従来一般的な接合方法の断面図である。FIG. 2 is a cross-sectional view of a conventional general joining method.
【図３】本発明による接合方法の加熱状態を示す断面図
である。FIG. 3 is a sectional view showing a heating state of the bonding method according to the present invention.
【図４】加熱直後の状態を示す断面図である。FIG. 4 is a sectional view showing a state immediately after heating.
【図５】本発明による接合方法で接合された接合部分の
断面図である。FIG. 5 is a sectional view of a joint portion joined by the joining method according to the present invention.
【図６】熱板と間隔板との構成を示す斜視図である。FIG. 6 is a perspective view showing a configuration of a hot plate and a spacing plate.
１−段ボール甲、１ａ−上シート、１ｂ−下シート ２−段ボール乙、２ａ−上シート、２ｂ−下シート ３−支え ４−接合面 ５−熱板 ６−間隔板 ７−支持体 1-Corrugated cardboard upper, 1a-upper sheet, 1b-lower sheet 2-corrugated cardboard 2a-upper sheet, 2b-lower sheet 3-support 4-joint surface 5-hot plate 6-spacing plate 7-support
Claims (1)
に接触すること以上に押し付けられないように、熱板と
ほぼ同じ厚みの間隔板を熱板と同一平面の熱板の近傍に
設け、該熱板と間隔板を接合面の間に挟み込んで、熱板
の熱で接合面を溶かした後、熱板と間隔板を取り除き、
次に接合面を密着させて、段ボール相互を熱溶着で接合
するように構成したことを特徴とするプラスチック段ボ
ールの接合方法。An interval plate having substantially the same thickness as the hot plate is provided near a hot plate flush with the hot plate so that the hot plate for heating the joining surface is not pressed beyond contact with the joining surface. Provided, sandwiching the hot plate and the spacing plate between the joining surfaces, after melting the joining surface with the heat of the hot plate, removing the hot plate and the spacing plate,
Next, a method of joining plastic cardboard, characterized in that the joining surfaces are brought into close contact with each other and the cardboards are joined together by heat welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28343396A JP3741325B2 (en) | 1996-10-03 | 1996-10-03 | Joining apparatus and joining method for plastic corrugated cardboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28343396A JP3741325B2 (en) | 1996-10-03 | 1996-10-03 | Joining apparatus and joining method for plastic corrugated cardboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10109368A true JPH10109368A (en) | 1998-04-28 |
| JP3741325B2 JP3741325B2 (en) | 2006-02-01 |
Family
ID=17665481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28343396A Expired - Fee Related JP3741325B2 (en) | 1996-10-03 | 1996-10-03 | Joining apparatus and joining method for plastic corrugated cardboard |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3741325B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007106123A (en) * | 2005-06-13 | 2007-04-26 | Techno Seiki:Kk | Welding device for plastic corrugated board and method for manufacturing plastic corrugated board finished product |
| JP2007106065A (en) * | 2005-10-17 | 2007-04-26 | Ube Nitto Kasei Co Ltd | Sealing method for composite plate material end section, and composite plate material formed by the method, and box-like body |
| JP2008188976A (en) * | 2007-02-08 | 2008-08-21 | Munekata Co Ltd | Reinforced structure of adhesive part of plastic corrugated board and heat chip for obtaining the same |
-
1996
- 1996-10-03 JP JP28343396A patent/JP3741325B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007106123A (en) * | 2005-06-13 | 2007-04-26 | Techno Seiki:Kk | Welding device for plastic corrugated board and method for manufacturing plastic corrugated board finished product |
| JP2007106065A (en) * | 2005-10-17 | 2007-04-26 | Ube Nitto Kasei Co Ltd | Sealing method for composite plate material end section, and composite plate material formed by the method, and box-like body |
| JP2008188976A (en) * | 2007-02-08 | 2008-08-21 | Munekata Co Ltd | Reinforced structure of adhesive part of plastic corrugated board and heat chip for obtaining the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3741325B2 (en) | 2006-02-01 |
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