JP4715488B2 - Folding method of synthetic resin bubble board - Google Patents

Folding method of synthetic resin bubble board Download PDF

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JP4715488B2
JP4715488B2 JP2005354777A JP2005354777A JP4715488B2 JP 4715488 B2 JP4715488 B2 JP 4715488B2 JP 2005354777 A JP2005354777 A JP 2005354777A JP 2005354777 A JP2005354777 A JP 2005354777A JP 4715488 B2 JP4715488 B2 JP 4715488B2
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synthetic resin
bubble board
sheet
board
temperature
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克明 加藤
友規 宿利
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Kawakami Sangyo KK
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本発明は、合成樹脂製気泡ボードの折り曲げ加工方法に関する。   The present invention relates to a method for bending a synthetic resin foam board.

凹凸状シートとその両面に接合された２枚の平坦状シートとからなり、多数の気泡部が形成された合成樹脂製気泡ボードが知られている。このような気泡ボードの折り曲げ加工について図４に基づいて説明する。   A synthetic resin bubble board is known which is composed of a concavo-convex sheet and two flat sheets bonded on both sides thereof and in which a large number of bubble portions are formed. Such a bending process of the bubble board will be described with reference to FIG.

まず、罫線加工用バー２０の刃先を常温で気泡ボード１０に押しつけ、折り目を形成する折り曲げ部１０ａに罫線加工を施す（図４（ａ））。次に、折り曲げ部１０ａに加熱されたホットメルト系接着剤３０を充填する（図４（ｂ））。気泡ボード１０の折り曲げ部１０ａは、ホットメルト系接着剤３０の余熱で加熱され、柔軟性が生じる。そして、折り曲げ加工用の治具４０の上に気泡ボード１０を配置する（図４（ｃ））。これにより、気泡ボード１０が折り曲げ部１０ａで折れ曲がった状態で硬化する。   First, the cutting edge of the ruled line processing bar 20 is pressed against the bubble board 10 at room temperature, and the bent part 10a forming the crease is subjected to ruled line processing (FIG. 4A). Next, the heated hot melt adhesive 30 is filled in the bent portion 10a (FIG. 4B). The bent portion 10a of the bubble board 10 is heated by the residual heat of the hot melt adhesive 30, and flexibility is generated. And the bubble board 10 is arrange | positioned on the jig | tool 40 for a bending process (FIG.4 (c)). Thereby, the bubble board 10 is cured in a state of being bent at the bent portion 10a.

しかしながら、ホットメルト系接着剤は熱容量が大きいため、気泡ボード１０の折り曲げ部１０ａが温度低下して硬化するまでに時間がかかる。このため、折り曲げ部１０ａの治具４０に接触する面に凹凸が生じ、美観を損ねてしまうという問題がある。   However, since the hot melt adhesive has a large heat capacity, it takes time for the bent portion 10a of the bubble board 10 to be cured by lowering the temperature. For this reason, there exists a problem that an unevenness | corrugation arises in the surface which contacts the jig | tool 40 of the bending part 10a, and a beauty | look is impaired.

本発明は上記点に鑑み、合成樹脂製気泡ボードを折り曲げ加工する際に、折り曲げ部の美観が悪化することを抑制することを目的とする。   In view of the above points, an object of the present invention is to suppress deterioration in the appearance of a bent portion when a synthetic resin bubble board is bent.

上記目的を達成するため、本発明は、合成樹脂製気泡ボード（１０、６０）における折り目を形成する折り曲げ部（１０ａ）に、常温で罫線もしくは切れ目を形成する第１の工程と、折り曲げ部（１０ａ）を加熱装置（５０）で加圧しながら所定温度に加熱する第２の工程と、合成樹脂製気泡ボード（１０）を折り曲げ部（１０ａ）において所定角度で折り曲げた状態で保持する第３の工程とを備えることを第１の特徴としている。   In order to achieve the above object, the present invention includes a first step of forming a ruled line or a cut line at a normal temperature on a bent portion (10a) for forming a fold in a synthetic resin bubble board (10, 60), and a bent portion ( A second step of heating 10a) to a predetermined temperature while being pressurized with a heating device (50); and a third step of holding the synthetic resin bubble board (10) in a state bent at a predetermined angle at the bent portion (10a). The first feature is to include a process.

このように、気泡ボード（１０）自体を加熱することで、従来技術のように気泡ボード（１０）に熱を有するホットメルト系接着剤を充填する場合に比較して短時間で温度低下する。このため、気泡ボード（１０）の折り曲げ部（１０ａ）は、短時間で硬化するので、折り曲げ部（１００）に凹凸が発生することを抑制できる。   Thus, by heating the foam board (10) itself, the temperature is lowered in a short time compared to the case where the hot melt adhesive having heat is filled in the foam board (10) as in the prior art. For this reason, since the bending part (10a) of a bubble board (10) hardens | cures in a short time, it can suppress that an unevenness | corrugation generate | occur | produces in a bending part (100).

また、本発明は、第２の工程における所定温度は、合成樹脂製気泡ボード（１０）を構成する合成樹脂の融点より高く、合成樹脂から凹凸状シート（１１）および平坦状シート（１３）を押し出し成形する際の合成樹脂温度より低いことを第２の特徴としている。これにより、合成樹脂製気泡ボード（１０）を軟化させた後に短時間で温度低下させることができる。 In the present invention, the predetermined temperature in the second step is higher than the melting point of the synthetic resin constituting the synthetic resin bubble board (10), and the concave and convex sheet (11) and the flat sheet (1 3 ) are formed from the synthetic resin. The second feature is that the temperature is lower than the synthetic resin temperature at the time of extrusion molding. Thereby, after softening the synthetic resin foam board (10), the temperature can be lowered in a short time.

なお、上記各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。   In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

以下、本発明の一実施形態について図１、図２に基づいて説明する。   Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

図１（ａ）は合成樹脂製気泡ボード１０の斜視図であり、図２（ｂ）は合成樹脂製気泡ボード１０を分解した状態を示す斜視図である。   FIG. 1A is a perspective view of the synthetic resin bubble board 10, and FIG. 2B is a perspective view showing a state in which the synthetic resin bubble board 10 is disassembled.

図１（ａ）、図１（ｂ）に示すように、気泡ボード１０は合成樹脂製中空板から構成されている。このような気泡ボード１０として、プラパール（登録商標）の商品名で知られているものを用いることができる。気泡ボード１０は、凹凸状シート１１と、凹凸状シート１１の両面に接合された２枚の平坦状シート１２、１３とからなる３層構造となっている。凹凸状シート１１には複数の中空状（例えば円柱状）の突起部１１ａがエンボス加工されている。凹凸状シート１１の突起部１１ａの先端側（図１の上側）に第１の平坦状シート１２が接合され、凹凸状シート１１の突起部１１ａの開口側（図１の下側）に第２の平坦状シート１３が接合されている。凹凸状シート１１と第２の平坦状シート１３との間には、空気が封入された密閉空間１４が形成される。   As shown in FIGS. 1A and 1B, the bubble board 10 is formed of a synthetic resin hollow plate. As such a bubble board 10, what is known by the brand name of PLAPARAL (registered trademark) can be used. The bubble board 10 has a three-layer structure including an uneven sheet 11 and two flat sheets 12 and 13 bonded to both surfaces of the uneven sheet 11. A plurality of hollow (for example, columnar) protrusions 11 a are embossed on the uneven sheet 11. The first flat sheet 12 is joined to the leading end side (upper side in FIG. 1) of the protrusion 11a of the concavo-convex sheet 11, and the second is on the opening side (lower side in FIG. 1) of the ridge 11a. The flat sheet 13 is joined. A sealed space 14 in which air is enclosed is formed between the uneven sheet 11 and the second flat sheet 13.

このような構成により、気泡ボード１０は、軽量であり、また耐圧縮性、耐衝撃性に優れるという特性を有している。合成樹脂としては、ポリエチレンやポリプロピレンといったポリオレフィン系重合体や再生ＰＥＴのような分解性プラスチックを用いることができる。本実施形態では、合成樹脂としてポリプロピレンを用いている。   With such a configuration, the bubble board 10 has characteristics of being lightweight and excellent in compression resistance and impact resistance. As the synthetic resin, a polyolefin polymer such as polyethylene or polypropylene or a degradable plastic such as recycled PET can be used. In this embodiment, polypropylene is used as the synthetic resin.

このような構成の気泡ボード１０としては、単位面積当り重量（目付重量）が２００グラム／ｍ2〜３０００グラム／ｍ2程度のものがよく知られている。気泡ボード１０は軟質の肉厚シートから構成され曲げ剛性を有しており、薄肉シートから構成され柔軟性を有する気泡シートと区別される。なお、本明細書中において合成樹脂製中空板とは、目付重量が２００グラム／ｍ2以上の気泡ボードを意味するものとする。本実施形態では、厚みが５ｍｍの気泡ボード１０を用いている。 As the bubble board 10 having such a configuration, one having a weight per unit area (weight per unit area) of about 200 g / m 2 to 3000 g / m 2 is well known. The bubble board 10 is made of a soft thick sheet and has bending rigidity, and is made of a thin sheet and is distinguished from a bubble sheet having flexibility. In the present specification, the synthetic resin hollow plate means a bubble board having a weight per unit area of 200 g / m 2 or more. In the present embodiment, the bubble board 10 having a thickness of 5 mm is used.

次に、本実施形態の気泡ボード１０の折り曲げ加工方法について図２に基づいて説明する。図２は、気泡ボード１０の折り曲げ加工方法を説明するための工程図である。   Next, the bending method of the bubble board 10 of this embodiment is demonstrated based on FIG. FIG. 2 is a process diagram for explaining a method of bending the bubble board 10.

まず、罫線加工用バー２０の刃先を常温で気泡ボード１０に押しつけ、折り曲げ部１０ａに罫線加工を施す（図２（ａ））。これにより、折り曲げ部１０ａに罫線加工用バー２０で押しつぶされた折り目が形成される。   First, the cutting edge of the ruled line processing bar 20 is pressed against the bubble board 10 at room temperature, and the bent part 10a is subjected to ruled line processing (FIG. 2A). Thereby, a crease crushed by the ruled line processing bar 20 is formed in the bent portion 10a.

次に、罫線加工された折り曲げ部１０ａをヒートシールバー５０で加熱しながら加圧する（図２（ｂ））。ヒートシールバー５０は、例えば内部にヒートパイプ等の発熱体が埋め込まれており、任意の温度に制御することができるものである。ヒートシールバー５０は、本発明の加熱装置の一具体例を示している。   Next, the bent portion 10a subjected to ruled line processing is pressurized while being heated by the heat seal bar 50 (FIG. 2B). The heat seal bar 50 has a heating element such as a heat pipe embedded therein, and can be controlled to an arbitrary temperature. The heat seal bar 50 shows a specific example of the heating device of the present invention.

ヒートシールバー５０の加熱温度は、気泡ボード１０を構成する合成樹脂の融点より高く、合成樹脂シート１１〜１３の押出成形温度より低い温度とする。このような温度範囲で気泡ボード１０を加熱することで、気泡ボード１０を軟化させた後に短時間で温度低下させることができる。本実施形態では、合成樹脂の融点が１７０℃程度、合成樹脂シート１１〜１３の押出成形温度が２７０℃程度であり、ヒートシールバー５０の加熱温度を２５０〜２７０℃程度としている。また、ヒートシールバー５０による加熱時間は３〜５秒程度とする。
The heating temperature of the heat seal bar 50 is higher than the melting point of the synthetic resin constituting the bubble board 10 and lower than the extrusion molding temperature of the synthetic resin sheets 11 to 13. By heating the foam board 10 in such a temperature range, it is possible to temperature drop in a short time after softening the foam board 10. In this embodiment, the melting point of the synthetic resin is about 170 ° C., the extrusion temperature of the synthetic resin sheets 11 to 13 is about 270 ° C., and the heating temperature of the heat seal bar 50 is about 250 to 270 ° C. The heating time by the heat seal bar 50 is about 3 to 5 seconds.

気泡ボード１０の折り曲げ部１０ａは、ヒートシールバー５０による加熱で軟化する。そして、折り曲げ加工用の治具４０の上に気泡ボード１０を配置する（図２（ｃ））。治具４０には段差面が形成されており、段差面は気泡ボード１０に形成する折り目の形状に合わせた所望の角度を有している。折り曲げ部１０ａを段差面に合わせて気泡ボード１０を治具４０の上に配置することで、気泡ボード１０の折り曲げ部１０ａを所定角度に折り曲げた状態で保持することができる。   The bent portion 10 a of the bubble board 10 is softened by heating with the heat seal bar 50. And the bubble board 10 is arrange | positioned on the jig | tool 40 for a bending process (FIG.2 (c)). A step surface is formed on the jig 40, and the step surface has a desired angle according to the shape of the crease formed in the bubble board 10. By placing the bubble board 10 on the jig 40 with the bent portion 10a aligned with the stepped surface, the bent portion 10a of the bubble board 10 can be held in a state of being bent at a predetermined angle.

このとき、本実施形態では気泡ボード１０自体が加熱されているので、従来技術のように気泡ボード１０に熱を有するホットメルト系接着剤を充填して加熱する場合に比較して短時間（数秒程度）で温度低下する。このため、気泡ボード１０の折り曲げ部１０ａは、短時間で温度低下して硬化するので、治具４０と接触する面に凹凸が発生することを抑制できる。   At this time, since the bubble board 10 itself is heated in the present embodiment, it is a short time (several seconds) as compared to the case where the bubble board 10 is heated by filling the bubble board 10 with heat as in the prior art. Temperature). For this reason, since the bent part 10a of the bubble board 10 is cured by lowering the temperature in a short time, it is possible to suppress the occurrence of unevenness on the surface in contact with the jig 40.

（他の実施形態）
なお、上記実施形態では、気泡ボード１０として凹凸状シート１１を２枚の平坦状シート１２、１３で挟み込む三層品を用いたが、これに限らず、図３に示す二層品の気泡ボード６０に対しても本発明を適用することができる。この気泡ボード６０は、凹凸状シート１１の突起部１１ａの先端側に平坦状シート１２が接合されているものを用いる。そして、罫線加工用バー２０による罫線加工およびヒートシールバー５０による加熱加圧処理は、平坦状シート１２側で行う。 (Other embodiments)
In the above-described embodiment, a three-layer product in which the concavo-convex sheet 11 is sandwiched between two flat sheets 12 and 13 is used as the foam board 10. However, the present invention is not limited to this, and the two-layer foam board shown in FIG. The present invention can be applied to 60. As the bubble board 60, the one in which the flat sheet 12 is bonded to the tip end side of the protrusion 11 a of the uneven sheet 11 is used. Then, the ruled line processing by the ruled line processing bar 20 and the heating and pressing process by the heat seal bar 50 are performed on the flat sheet 12 side.

また、上記実施形態では、罫線加工用バー２０を気泡ボード１０に押しつけて折り曲げ部１０ａに罫線加工したが、罫線加工に代えて、折り曲げ部１０ａに切れ目を形成するハーフカットを施してもよい。そして、折り曲げ部１０ａに形成された切れ目にヒートシールバー５０を押しつけて、加熱および加圧すればよい。   Further, in the above embodiment, the ruled line processing bar 20 is pressed against the bubble board 10 and the bent part 10a is processed with the ruled line. And what is necessary is just to press and heat and press the heat-seal bar | burr 50 to the cut | interruption formed in the bending part 10a.

上記実施形態の合成樹脂製気泡ボードの斜視図である。It is a perspective view of the synthetic resin bubble board of the said embodiment. 上記実施形態の合成樹脂製気泡ボードの折り曲げ加工方法の工程図である。It is process drawing of the bending method of the synthetic resin bubble board of the said embodiment. 上記実施形態の変形例を示す合成樹脂製気泡ボードの斜視図である。It is a perspective view of the synthetic resin bubble board which shows the modification of the said embodiment. 従来技術の合成樹脂製気泡ボードの折り曲げ加工方法の工程図である。It is process drawing of the bending method of the synthetic resin bubble board of a prior art.

符号の説明Explanation of symbols

１０、６０…合成樹脂製気泡ボード、１０ａ…折り曲げ部、１１…凹凸状シート、１２、１３…平坦状シート。   DESCRIPTION OF SYMBOLS 10, 60 ... Synthetic resin bubble board, 10a ... Bending part, 11 ... Concave-like sheet, 12, 13 ... Flat sheet.

Claims (2)

多数の突起部（１１ａ）が形成された凹凸状シート（１１）と前記凹凸状シート（１１）における少なくとも前記突起部（１１ａ）の開口側に接合された平坦状シート（１３）とを備え、前記凹凸状シート（１１）の前記突起部（１１ａ）と前記平坦状シート（１３）との間に空気が封入された密閉空間（１４）が形成される合成樹脂製気泡ボード（１０、６０）を折り曲げ加工する合成樹脂製気泡ボードの折り曲げ加工方法であって、
前記合成樹脂製気泡ボード（１０、６０）における折り目を形成する折り曲げ部（１０ａ）に、常温で罫線もしくは切れ目を形成する第１の工程と、
前記折り曲げ部（１０ａ）を加熱装置（５０）で加圧しながら所定温度に加熱する第２の工程と、
前記合成樹脂製気泡ボード（１０）を前記折り曲げ部（１０ａ）において所定角度で折り曲げた状態で保持する第３の工程とを備えることを特徴とする合成樹脂製気泡ボードの折り曲げ加工方法。 The concavo-convex sheet (11) on which a large number of protrusions (11a) are formed, and a flat sheet (1 3 ) bonded to at least the opening side of the protrusion (11a) in the concavo-convex sheet (11). the indented sheet (11) the protrusion (11a) and said flat sheet (13) an enclosed space (14) is a synthetic resin foam boards that will be formed in which air is filled between the (10, 60 ) Is a bending method of a synthetic resin bubble board,
A first step of forming a ruled line or a cut at room temperature in the bent portion (10a) for forming a fold in the synthetic resin bubble board (10, 60);
A second step of heating the bent portion (10a) to a predetermined temperature while being pressurized by a heating device (50);
And a third step of holding the synthetic resin bubble board (10) in a state of being bent at a predetermined angle at the bent portion (10a). 前記第２の工程における前記所定温度は、前記合成樹脂製気泡ボード（１０）を構成する合成樹脂の融点より高く、前記合成樹脂から前記凹凸状シート（１１）および前記平坦状シート（１３）を押し出し成形する際の合成樹脂温度より低いことを特徴とする請求項１に記載の合成樹脂製気泡ボードの折り曲げ加工方法。 The predetermined temperature in the second step is higher than the melting point of the synthetic resin constituting the synthetic resin bubble board (10), and the concavo-convex sheet (11) and the flat sheet (1 3 ) from the synthetic resin. The method for bending a synthetic resin bubble board according to claim 1, wherein the temperature is lower than a synthetic resin temperature at the time of extrusion molding.
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EP3042759B1 (en) 2013-09-02 2017-11-22 Kyoraku Co., Ltd. Resin laminated plate
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JPH0716918A (en) * 1993-06-29 1995-01-20 Apatsukusu:Kk Apparatus for bending of plastic corrugated fiberboard
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JPH10119954A (en) * 1996-10-14 1998-05-12 Nishida Seikan Kk Container

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