JPH1044239A - Apparatus for heat fusion of thin sheet of thermoplastic resin foamed body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform heat fusion of a thin sheet without shrinkage by a process wherein the end part of the thin sheet of a thermoplastic formed body laminated on a foamed matrix is taken up by a suction tool and the thin sheet is pressed by means of a press roll from the back upper part of a heater moving between the thin sheet and the matrix and heating and fusing both of the thin sheet and the matrix. SOLUTION: A thermoplastic resin foamed body, e.g., a matrix consisting of a crosslinked polyethylene foamed body is sucked to fix it on a platen 1 and a suction tool 2 is lowered and is brought into contact with the end part of a thin sheet 7 of the thermoplastic resin foamed body and suction is performed by depressurizing by a blower and the end part of the thin sheet 7 is taken up by means of the suction tool 2 and a heater 3 is moved and entered below it. The suction tool 2 is lowered to laminate and release the end part of the thin sheet 7 on the matrix and is returned to its original position. A press roll 4 presses the thin sheet 7 approximately from the top of the heater 3 and a press roll 5 moves onto the thin sheet 7 and presses it by following the back of the heater 3 to complete heat fusion.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、熱可塑性樹脂発泡
体薄物シートを熱融着する装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for heat-sealing a thin sheet of thermoplastic resin foam.

【０００２】[0002]

【従来の技術】近年ポリエチレン発泡体等の熱可塑性樹
脂発泡体は、土木建築、海洋、スポーツ等の各種用途開
発によって生産量が増大している。例えば、加圧一段発
泡法又は二段発泡法（参照：特公昭４５−２９３８１号
及び特公平２−４２６４９号）等により厚物の熱可塑性
樹脂発泡体が大量に生産されている。このような厚物発
泡体は、厚物で販売される場合と、厚み１０ｍｍ以下に
スライスして販売する場合とがある。薄くスライスして
ピンホール、色ムラ等があれば、出荷出来ず不良在庫に
なってしまう。従来の熱融着機は、図９に示す様に、赤
外線ヒーター１３等の加熱方法で、発泡体１４及び１５
の表面のみを均一に溶融し、直ちに圧着し、発泡体同士
を接着するものである。しかし、このような従来の熱融
着機を薄物のポリエチレン系シートの熱融着に適用する
と、熱で収縮し、製品として使用出来なくなることと、
薄物シートを投入口にロールと平行に入れるためには、
スキルの必要なことが欠点であった。2. Description of the Related Art In recent years, the production of thermoplastic resin foams such as polyethylene foams has been increasing due to the development of various uses such as civil engineering, marine and sports. For example, thick thermoplastic resin foams are produced in large quantities by a pressurized one-stage foaming method or a two-stage foaming method (see Japanese Patent Publication No. 45-29381 and Japanese Patent Publication No. 2-42649). Such a thick foam may be sold as a thick article, or may be sold after being sliced to a thickness of 10 mm or less. If there is a pinhole, color unevenness, etc. sliced thinly, it cannot be shipped, resulting in defective stock. As shown in FIG. 9, the conventional heat-sealing machine employs a heating method such as an infrared heater 13 to form the foams 14 and 15.
Is uniformly melted only, and immediately pressed to bond the foams together. However, when such a conventional heat-sealing machine is applied to heat-sealing of a thin polyethylene-based sheet, it shrinks due to heat and cannot be used as a product.
To put a thin sheet parallel to the roll into the slot,
The need for skill was a drawback.

【０００３】[0003]

【発明が解決しようとする課題】従って、本発明の目的
は、前記従来技術の問題点を解決し、薄物のポリエチレ
ン系シートを収縮させることなく熱融着することが出来
る熱融着装置を提供し、資源の有効活用を図ることにあ
る。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide a heat-sealing apparatus capable of heat-sealing a thin polyethylene sheet without shrinking. And make effective use of resources.

【０００４】[0004]

【課題を解決するための手段】本発明の熱可塑性樹脂発
泡体薄物シートの熱融着機は大きく分けて２通りの発明
がある。第一の発明は、熱可塑性樹脂発泡体の母材に重
ね合わせた熱可塑性樹脂発泡体薄物シートの端部を持ち
上げる吸着具と、薄物シートと母材との間を移動しなが
ら両者を加熱溶融させるヒーターと、ヒーター後方上か
ら薄物シートを押圧する圧縮ロールとから成る熱可塑性
樹脂発泡体薄物シートの熱融着機である。第一の発明に
おいて、ヒーターの略上から薄物シートを押えるロール
を設けることが、シートにしわを生じさせないために好
ましい。第二の発明は、外周に吸引孔を設け、熱可塑性
樹脂薄物シートの端部を吸着し、回転及び前後に移動可
能な押圧ロールと、押圧ロールの前を移動しながら熱可
塑性樹脂発泡体の母材と薄物シートを加熱溶融するヒー
ターより成る熱可塑性樹脂発泡体薄物シートの熱融着装
置である。Means for Solving the Problems There are roughly two types of inventions for the heat-sealing machine for thin sheets of thermoplastic resin foam of the present invention. The first invention is a suction device that lifts an end portion of a thin thermoplastic resin foam sheet superimposed on a base material of a thermoplastic resin foam, and heats and melts both while moving between the thin sheet and the base material. This is a heat-sealing machine for a thermoplastic resin foam thin sheet, comprising a heater to be heated and a compression roll for pressing the thin sheet from above the rear of the heater. In the first invention, it is preferable to provide a roll that presses the thin sheet from substantially above the heater so as not to cause wrinkles in the sheet. The second invention provides a suction hole in the outer periphery, adsorbs the end of the thin thermoplastic resin sheet, and a pressing roll capable of rotating and moving back and forth, and a thermoplastic resin foam while moving in front of the pressing roll. This is a heat fusion apparatus for a thermoplastic resin foam thin sheet, comprising a heater for heating and melting the base material and the thin sheet.

【０００５】第一の発明及び第二の発明において、ヒー
ターは、例えば、石英管ヒーター、ラマロッド、直火式
等が適用出来るが、ロツドヒーターが、発泡体を効率良
く溶融出来、かつ火災の危険性がないため、好ましい。
本発明の熱融着装置に適用出来る熱可塑性樹脂発泡体と
しては、ポリスチレン発泡体、高、中、低圧法により製
造されたポリエチレン、エチレン−プロピレン共重合
体、エチレン−ブテン共重合体、エチレン−酢酸ビニル
共重合体等のポリオレフィン樹脂等を基材とする発泡体
があるが、ポリエチレン、エチレン−酢酸ビニル共重合
体等を基材とするポリエチレン系発泡体が熱で収縮し易
く、本発明に適用すると効果が顕著である。これらの樹
脂又はこれに混合可能なゴム、プラスチックとの混合物
を基材とし、従来公知の化学架橋及び／又は電子線架橋
による連続式発泡法又は加圧一段発泡、二段発泡法等の
バッチ法によって製造される架橋又は加硫発泡体等が適
用される。In the first invention and the second invention, as the heater, for example, a quartz tube heater, a lama rod, a direct fire type, etc. can be applied. However, the rod heater can efficiently melt the foam and may cause a fire hazard. It is preferable because there is no.
The thermoplastic resin foam applicable to the heat sealing apparatus of the present invention includes polystyrene foam, polyethylene manufactured by high, medium, and low pressure methods, ethylene-propylene copolymer, ethylene-butene copolymer, and ethylene- There is a foam based on a polyolefin resin or the like such as a vinyl acetate copolymer, but polyethylene, a polyethylene foam based on an ethylene-vinyl acetate copolymer or the like is easily shrunk by heat, and in the present invention, The effect is remarkable when applied. A batch method such as a continuous foaming method or a pressurized single-stage foaming method or a two-stage foaming method based on a conventionally known chemical crosslinking and / or electron beam crosslinking using these resins or a mixture of a rubber and a plastic that can be mixed with the resin as a base material. A crosslinked or vulcanized foam manufactured by the method described above is applied.

【０００６】[0006]

【実施例】以下、図面に従って本発明の実施例を説明す
るが、本発明の熱融着装置は下記実施例に何等制限され
るものではない。 実施例１ 図１は、本発明の第一の実施例を示す熱融着機の側面図
で、１は定盤、２は吸着具、３はロッドヒーター、４は
押えロール、５は後方の圧縮ロール、６は架橋ポリエチ
レン発泡体（商品名 サンペルカＬ−１４００、みかけ
密度０．０６７ｇ／ｃｍ^３、三和化工株式会社製）より
成る母材、厚み１０ｍｍ、７は架橋ポリエチレン発泡体
（前述）の薄物シート、厚み２〜１０ｍｍの任意の厚み
である。定盤１の上面には、パンチングメタル等による
無数の孔が設けられ、ブロワー（図示省略）に接続され
て、母材６を吸引し、定盤１に固定する。次に、図２に
示す様に、吸着具２が降下し、薄物シート７の端部に接
触し、ブロワー（図示省略）で減圧することにより吸引
し、図３に示す様に吸着具２が薄物シート７の端部を持
ち上げ、その下にロッドヒーター３が移動して入る。図
４に示す様に、吸着具２が降下し、吸着具２は、図５に
示す様に母材６の上に薄物シート７の端部を重ねて放
し、図６の様に、原点位置に戻る。押えロール４がロッ
ドヒーター３の略上から薄物シート７を押え、押圧ロー
ル５が薄物シート７上に移動してヒーター３の後ろを追
って押圧し熱融着を完了させる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. However, the heat sealing apparatus of the present invention is not limited to the following embodiments. Embodiment 1 FIG. 1 is a side view of a heat sealing machine showing a first embodiment of the present invention, 1 is a platen, 2 is a suction device, 3 is a rod heater, 4 is a pressing roll, and 5 is a rear side. A compression roll, 6 is a base material made of a crosslinked polyethylene foam (trade name: Sanperka L-1400, apparent density 0.067 g / cm ³ , manufactured by Sanwa Kako Co., Ltd.), a thickness of 10 mm, and 7 is a crosslinked polyethylene foam (described above). Thin sheet having an arbitrary thickness of 2 to 10 mm. Innumerable holes made of punching metal or the like are provided on the upper surface of the platen 1 and connected to a blower (not shown) to suck the base material 6 and fix it to the platen 1. Next, as shown in FIG. 2, the suction tool 2 descends, contacts the end of the thin sheet 7, and sucks it by reducing the pressure with a blower (not shown). As shown in FIG. The end portion of the thin sheet 7 is lifted, and the rod heater 3 moves under the end. As shown in FIG. 4, the suction tool 2 descends, and the suction tool 2 releases the end of the thin sheet 7 on the base material 6 as shown in FIG. Return to The pressing roll 4 presses the thin sheet 7 from almost above the rod heater 3, and the pressing roll 5 moves onto the thin sheet 7 and presses behind the heater 3 to complete the heat fusion.

【０００７】実施例２ 図７は、本発明の第二の実施例を示す熱融着機の側面図
で、図中、８は、押圧ロール、９は吸引孔、１０はロッ
ドヒーター、１１は架橋ポリエチレン発泡体（前述）の
薄物シート（２〜１０ｍｍの任意の厚み）、１２は架橋
ポリエチレン発泡体（前述）の母材（厚み１０ｍｍ）で
ある。薄物シート１１の端部は、押圧ロール８の外周に
設けられ、ブロワー（図示省略）に接続された吸引孔に
吸着され、押圧ロール８が回転しながら前へ移動し、該
薄物シート１１は、押圧ロールに巻ついた状態で薄物シ
ートの端材が母材１２の端部に重ね合わされて（図
８）、吸引孔から開放される。ロッドヒーター１０は、
押圧ロール８の前を移動し、母材１２と薄物シート８の
表面を加熱溶融する。その後を押圧ロールが回転しなが
ら、薄物シート１１を母材１２の上に押圧し、圧着して
行く。第二の実施例においても、第一の実施例と同じ定
盤が使用される。Embodiment 2 FIG. 7 is a side view of a heat sealing machine showing a second embodiment of the present invention, in which 8 is a pressing roll, 9 is a suction hole, 10 is a rod heater, and 11 is a rod heater. A thin sheet (arbitrary thickness of 2 to 10 mm) of a crosslinked polyethylene foam (described above), and 12 is a base material (10 mm in thickness) of the crosslinked polyethylene foam (described above). The end of the thin sheet 11 is provided on the outer periphery of the pressing roll 8 and is sucked by a suction hole connected to a blower (not shown), and the pressing roll 8 moves forward while rotating. The end material of the thin sheet is superimposed on the end of the base material 12 while being wound around the pressing roll (FIG. 8), and is released from the suction hole. The rod heater 10
It moves in front of the pressing roll 8 and heats and melts the surfaces of the base material 12 and the thin sheet 8. Thereafter, the thin sheet 11 is pressed onto the base material 12 while the pressing roll is rotating, and is pressed. In the second embodiment, the same surface plate as in the first embodiment is used.

【０００８】[0008]

【発明の効果】上述の様に、本発明の薄物熱融着装置に
よれば、熱融着後直ちに押圧することにより、熱可塑性
樹脂発泡体の薄物シートを収縮させることなく、熱融着
し、厚物化出来、従来死蔵されていた薄物シートを製品
として有効活用出来、省資源、省エネルギーめて有用で
ある。特に、図１に示す第一の発明は、薄物シートを押
圧ロールに巻き付けない為、発泡倍率が低く、硬度の高
い発泡体であっても、熱融着出来、発泡体産業において
極めて有用である。As described above, according to the thin-body heat-sealing apparatus of the present invention, the heat-sealing is performed immediately after the heat-sealing without shrinking the thin sheet of the thermoplastic resin foam. It can be made thicker, and the thin sheet that has been stolen before can be effectively used as a product, and it is useful for saving resources and energy. In particular, the first invention shown in FIG. 1 does not wind a thin sheet around a pressing roll, so that even a foam having a low expansion ratio and a high hardness can be heat-fused and is extremely useful in the foam industry. .

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の薄物融着装置の第一の実施例を示した
側面図。FIG. 1 is a side view showing a first embodiment of a thin material welding apparatus according to the present invention.

【図２】本発明の薄物融着装置の第一の実施例の作業工
程図。FIG. 2 is a work process diagram of a first embodiment of the thin material fusion apparatus according to the present invention.

【図３】本発明の薄物融着装置の第一の実施例の作業工
程図。FIG. 3 is a work process diagram of a first embodiment of the thin material fusion apparatus according to the present invention.

【図４】本発明の薄物融着装置の第一の実施例の作業工
程図。FIG. 4 is a work process diagram of the first embodiment of the thin material fusion apparatus according to the present invention.

【図５】本発明の薄物融着装置の第一の実施例の作業工
程図。FIG. 5 is a working process diagram of the first embodiment of the thin material fusing apparatus of the present invention.

【図６】本発明の薄物融着装置の第一の実施例の作業工
程図。FIG. 6 is a work process diagram of the first embodiment of the thin material welding apparatus according to the present invention.

【図７】本発明の薄物融着装置の第二の実施例の側面図FIG. 7 is a side view of a second embodiment of the thin material welding apparatus according to the present invention.

【図８】本発明の薄物融着装置の第二の実施例の作業工
程図。FIG. 8 is a work process diagram of a second embodiment of the thin material fusion apparatus according to the present invention.

【図９】従来の熱融着装置の側面図FIG. 9 is a side view of a conventional heat fusion apparatus.

【符合の説明】[Description of sign]

１ 定盤 ２ 吸着具 ３ ヒーター ４ 前方の圧縮ロール ５ 後方の圧縮ロール ６ 架橋ポリエチレン発泡体の母材 ７ 架橋ポリエチレン発泡体の薄物シート ８ 押圧ロール ９ 吸引孔 １０ ヒーター １１ 架橋ポリエチレン発泡体の薄物シート １２ 架橋ポリエチレン発泡体の母材 １３ ヒーター １４ 架橋ポリエチレン発泡体シート １５ 架橋ポリエチレン発泡体シート DESCRIPTION OF SYMBOLS 1 Surface plate 2 Adsorber 3 Heater 4 Front compression roll 5 Back compression roll 6 Base material of crosslinked polyethylene foam 7 Thin sheet of crosslinked polyethylene foam 8 Press roll 9 Suction hole 10 Heater 11 Thin sheet of crosslinked polyethylene foam 12 Base material of crosslinked polyethylene foam 13 Heater 14 Crosslinked polyethylene foam sheet 15 Crosslinked polyethylene foam sheet

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 熱可塑性樹脂発泡体の母材に重ね合わせ
た熱可塑性樹脂発泡体薄物シートの端部を持ち上げる吸
着具と、薄物シートと母材との間を移動しながら両者を
加熱溶融させるヒーターと、ヒーターの後方上から薄物
シートを押圧する圧縮ロールとから成る熱可塑性樹脂発
泡体薄物シートの熱融着装置。1. A suction device for lifting an end of a thin thermoplastic resin foam sheet superimposed on a matrix of a thermoplastic resin foam, and heating and melting both while moving between the thin sheet and the matrix. A heat-sealing apparatus for a thin thermoplastic resin foam sheet, comprising a heater and a compression roll for pressing the thin sheet from behind the heater. 【請求項２】 ヒーターの略上から薄物シートを押える
押えロールが設けられている請求項１記載の熱融着装
置。2. A heat fusing apparatus according to claim 1, further comprising a press roll for pressing the thin sheet from substantially above the heater. 【請求項３】 外周に吸引孔を設け、熱可塑性樹脂薄物
シートの端部を吸着し、回転及び前後に移動可能な押圧
ロールと、押圧ロールの前を移動しながら熱可塑性樹脂
発泡体の母材と薄物シートを加熱溶融するヒーターより
成る熱可塑性樹脂発泡体薄物シートの熱融着装置。3. A pressing roll which is provided with a suction hole on the outer periphery, adsorbs an end portion of the thin thermoplastic resin sheet, and can rotate and move back and forth, and a mother of the thermoplastic resin foam while moving in front of the pressing roll. Thermal fusion device for thermoplastic resin foam thin sheets, comprising a heater for heating and melting the material and the thin sheets. 【請求項４】 ヒーターがロッドヒーターである請求項
１，２又は３記載の熱融着装置。4. The heat fusion apparatus according to claim 1, wherein the heater is a rod heater.