JPH01128823A - Method for making fold line on laminated sheet - Google Patents
Method for making fold line on laminated sheetInfo
- Publication number
- JPH01128823A JPH01128823A JP28686787A JP28686787A JPH01128823A JP H01128823 A JPH01128823 A JP H01128823A JP 28686787 A JP28686787 A JP 28686787A JP 28686787 A JP28686787 A JP 28686787A JP H01128823 A JPH01128823 A JP H01128823A
- Authority
- JP
- Japan
- Prior art keywords
- melting point
- resin sheet
- sheet
- point resin
- low melting
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 73
- 239000011347 resin Substances 0.000 claims abstract description 73
- 238000002844 melting Methods 0.000 claims abstract description 61
- 230000008018 melting Effects 0.000 claims abstract description 57
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 4
- -1 polyethylene terephthalate Polymers 0.000 claims description 12
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 10
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 10
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 10
- 239000004800 polyvinyl chloride Substances 0.000 claims description 10
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 2
- 229930182556 Polyacetal Natural products 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 229920001328 Polyvinylidene chloride Polymers 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920006324 polyoxymethylene Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 239000005033 polyvinylidene chloride Substances 0.000 claims description 2
- 239000004721 Polyphenylene oxide Substances 0.000 claims 1
- 229920006380 polyphenylene oxide Polymers 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 8
- 238000010030 laminating Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 8
- 239000010410 layer Substances 0.000 description 11
- 238000004806 packaging method and process Methods 0.000 description 10
- 238000005452 bending Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002537 cosmetic Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0053—Moulding articles characterised by the shape of the surface, e.g. ribs, high polish
- B29C37/0057—Moulding single grooves or ribs, e.g. tear lines
Landscapes
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、樹脂シートよりの包装容器類の組立てに際し
て必要な、ヒンジ特性に優れた折り返し線を樹脂シート
の適所に付ける方法に関し、とくに電気・電子機器類、
日用雑貨類、工具類、食品、衣料用品、装身具、身回り
品、化粧品、室内装飾品など１ｒｒｌ’位までの大きさ
の各種包装箱類や、ブックカバー、アルバムの表紙等の
、包装容器類の製造に有用である。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for attaching folding lines with excellent hinge properties to resin sheets at appropriate locations, which are necessary when assembling packaging containers from resin sheets.・Electronic equipment,
Packaging containers for daily goods, tools, food, clothing, accessories, personal items, cosmetics, interior decoration, etc., up to 1rrl' in size, book covers, album covers, etc. It is useful in the production of products such as
（従来技術とその問題点）
従来、紙または紙と透明プラスチックとから作られてい
た上記の包装容器類が、最近高級感や透視性を求められ
て、自動製函機の普及と共にプラスチック製品に変わり
つつある。(Prior art and its problems) The above-mentioned packaging containers, which were conventionally made from paper or paper and transparent plastic, have recently been made from plastic products due to the demand for luxury and transparency, and with the spread of automatic box making machines. Things are changing.
これらの用途に供される樹脂シートは、自動製函機によ
り、所定の形状に打ち抜かれ、折り返し線が付けられた
後、それぞれの容器に組み立てられている。この際シー
トの厚みが０．３■程度までは、従来の紙箱と同様の手
法、っまりビク刃と押し罫刃とを用いた機械的手段が採
用されているが。Resin sheets used for these purposes are punched into a predetermined shape by an automatic box-making machine, folded lines are attached, and then assembled into respective containers. In this case, until the thickness of the sheet is about 0.3 cm, the same method used for conventional paper boxes, a mechanical means using a sharp blade and a creasing blade, is used.
樹脂シートでは紙と比べて組織が密なために折り線が付
けにくく、′折れにくい、折った時に破断しやすい、″
といった苦情が絶えない。この対策には均一な深さの折
り返し線を付けることが必要で、それには精巧な金型や
機械を用いなければならないという設備上の制約がある
ほか、この方法によっても機械的にかなりの無理が折り
返し線部に加わるため、ここにクラックを生じ易く、そ
れかもとでシートの破断に至るのを完全に防止できない
という状況にあった。Resin sheets have a denser structure than paper, so it is difficult to create crease lines, and they are difficult to break and break easily when folded.
There are endless complaints. This countermeasure requires creating folded lines of uniform depth, which requires the use of sophisticated molds and machines, which is an equipment constraint, and this method also requires considerable mechanical effort. Since this is applied to the folding line, cracks are likely to occur there, and it is not possible to completely prevent the sheet from breaking.
一方、特公昭５４−３０７０７号公報では樹脂シートに
箱型の半製品を作るための折り返し線を付ける方法とし
て、成形工具と作業台との間に単層の熱可塑性樹脂シー
トを配置し、成形工具をこの樹脂シートの溶融温度より
低い温度に維持し、成形工具と作業台との間に高周波の
電界を付与して樹脂シートを加熱し、成形工具を樹脂シ
ートの厚さの少なくとも２５％の深さまで、好ましくは
４０〜７０％の深さまで押入し、このシートが平坦な状
態を保っている間に冷却する方法を提案している。On the other hand, in Japanese Patent Publication No. 54-30707, as a method of attaching folding lines to a resin sheet for making a box-shaped semi-finished product, a single-layer thermoplastic resin sheet is placed between a molding tool and a workbench, and the molding The tool is maintained at a temperature below the melting temperature of the resin sheet, a high frequency electric field is applied between the forming tool and the worktable to heat the resin sheet, and the forming tool is heated to a thickness of at least 25% of the thickness of the resin sheet. A method is proposed in which the sheet is pressed to a depth, preferably 40 to 70%, and cooled while the sheet remains flat.
しかし、この方法で均一な深さの折り返し線を付けるに
は、■成形工具の温度分布が均一であること、■成形工
具の圧力が均一であること、■成形工具と定盤との平行
度が出ていることなどの要件を満足していなければなら
ず、それには上記と同様、装置の加熱・加圧機構や金型
が極めて高い精度で作られていることが前提となる。ま
た、この方法では上述のようにシートの厚さの４０〜７
０％を押入り深さとし、残りの６０〜３０％で折り曲げ
後のシートの強度を保持しようとするものであるため耐
久性に乏しく、また厚みが０ 、３ｍｍ以上の原物シー
トを折り曲げる場合、所望の角度にまで折り曲げること
自体困難となり、無理に折り曲げると、その外角のＲが
大きなものとなって見苦しいだけでなく、これに伴って
、いわゆるスプリングバックによる折り返しの戻りが大
きくなって、包装容器への組立て作業に支障を与えてい
る。However, in order to create a fold line of uniform depth using this method, ■ the temperature distribution of the forming tool must be uniform, ■ the pressure of the forming tool must be uniform, ■ the parallelism of the forming tool and the surface plate. It is necessary to satisfy requirements such as the appearance of the metal, and as mentioned above, this requires that the device's heating/pressure mechanism and mold be made with extremely high precision. In addition, in this method, as mentioned above, the thickness of the sheet is 40 to 7
0% is the penetration depth, and the remaining 60 to 30% is intended to maintain the strength of the sheet after folding, so it has poor durability, and when folding an original sheet with a thickness of 0.3 mm or more, It is difficult to bend it to the desired angle, and if the outside corner is bent forcibly, the radius of the outer corner becomes large, which is not only unsightly. This is causing a hindrance to assembly work.
一般に、耐折性を考慮して樹脂シートにＰＥ、ＰＰなど
を用いると、透明性が劣る上、折り曲げ部でのシャープ
さに欠けるため、包装材料用の箱物としての価値に乏し
く、また誘電率が小さいため高周波による内部発熱を起
しにくく加工性が悪いという欠点があり、一方樹脂シー
トとしてＰＥＴを使用する場合には、厚みが０．３ｍｍ
以上ではコストが嵩みすぎるという問題がある。In general, when PE, PP, etc. are used for resin sheets with folding durability in mind, they have poor transparency and lack sharpness at the bends, so they are of little value as boxes for packaging materials, and Due to the small ratio, it is difficult to generate internal heat due to high frequency and has the disadvantage of poor processability.On the other hand, when PET is used as the resin sheet, the thickness is 0.3 mm.
There is a problem in that the cost is too high.
このため上記公報に記載の方法において実際に使用でき
る樹脂シートは、厚みが０．３＋ａｍ以下の硬質ＰｖＣ
シートに限られることになり、その上この厚みから作り
得る包装容器の大きさが構造的に１００ｍｍ Ｘ １０
０ｍｍ Ｘ １００ｍｍ程度に制約されるほが、材料が
硬質ＰｖＣであるがために折り返し線部における耐折性
が劣り長期の使用に耐えられないという欠点を伴った。Therefore, the resin sheet that can actually be used in the method described in the above publication is a hard PvC sheet with a thickness of 0.3+am or less.
It is limited to sheets, and furthermore, the size of the packaging container that can be made from this thickness is structurally 100 mm x 10
If the size was limited to about 0 mm x 100 mm, the material was hard PvC, so the bending durability at the folding line was poor and it could not withstand long-term use.
（問題点を解決するための手段）
本発明はかかる問題点を解決すべく鋭意研究の結果達成
されたもので、樹脂シートよりの包装容器類の組立てに
おいて必要な、ヒンジ特性に優れた折り返し線を樹脂シ
ートの適所に付けるのに際し、ヒンジ特性を有する高融
点の樹脂シートの片面または両面に、これよりも２０℃
以上低融点の同種または異種の樹脂シートを積層してな
る複合シートを使用し、このシートの低融点の樹脂シー
ト面側より線付け金型を用いて、超音波、熱バーなどの
適宜の加熱加圧手段により、折り返し線を入れる方法を
採用するときは、■装置の加熱・加圧機構や金型がそれ
ほど高い精度で作られていなくても加工が容易に行える
、■シートの厚みが０．３ｎｕｎ以上あっても加工に支
障が無く１例えば樹脂シートの厚みが２．１５ｍｍでも
可能であり、その結果１０（１０ｍｍ Ｘ １０００ｍ
ｍ Ｘ １０００ｍｍ程度の大きさの包装容器の製作が
できる、■耐折性（ヒンジ特性）に富み、かつ折り返し
が容易であるため、包装容器への組立て作業性がよく、
また得られる容器の耐久性にも優れている、などの効果
の得られることを見出し。(Means for Solving the Problems) The present invention has been achieved as a result of intensive research in order to solve the problems, and is a folding line with excellent hinge characteristics necessary for assembling packaging containers from resin sheets. When attaching to the appropriate place on the resin sheet, it is necessary to apply a temperature of 20℃ higher than this on one or both sides of the high melting point resin sheet with hinge characteristics
A composite sheet made by laminating resin sheets of the same or different types with low melting points is used, and the sheet is heated using appropriate heating such as ultrasonic waves or a heat bar using a wire mold from the side of the resin sheet with low melting points. When adopting the method of inserting folded lines using pressure means, it is possible to: ■ process easily even if the heating/pressure mechanism of the device and the mold are not made with high precision, and ■ the thickness of the sheet is 0. There is no problem in processing even if the thickness is .3nun or more.1 For example, it is possible even if the thickness of the resin sheet is 2.15mm, and as a result, the thickness of the resin sheet is 10 (10mm
It is possible to manufacture packaging containers with a size of approximately 1,000 mm x 1,000 mm.It has excellent bending durability (hinge characteristics) and is easy to fold back, making it easy to assemble into packaging containers.
We also discovered that the resulting containers have excellent durability, among other benefits.
本発明を完成するに至ったものである。 これを説明す
ると１本発明において折り返し線を入れるために対象と
するシートは、ヒンジ特性を有する高融点の樹脂シート
の片面または両面に、これよりも２０℃以上低融点の同
種または異種の樹脂シートを積層してなる複合シートで
ある。この複合シートは第１図に示すように、高融点の
樹脂シート１の片面に低融点の樹脂シート２を積層した
もの３でも、高融点の樹脂シート１の両面に低融点の同
種の樹脂シート２を積層したもの４でも、あるいはまた
高融点の樹脂シート１の両面のそれぞれに低融点の異種
の樹脂シート２，５を積層したちの６でもよい。This has led to the completion of the present invention. To explain this, 1. In the present invention, the target sheet for inserting folding lines is a resin sheet of the same or different type with a melting point of 20°C or more lower than the resin sheet on one or both sides of a high melting point resin sheet having hinge characteristics. It is a composite sheet made by laminating. As shown in Figure 1, this composite sheet can be one in which a resin sheet 2 with a low melting point is laminated on one side of a resin sheet 1 with a high melting point, or a resin sheet 3 of the same type with a low melting point on both sides of a resin sheet 1 with a high melting point. 2 may be laminated, or 6 may be formed by laminating different types of low melting point resin sheets 2 and 5 on both sides of a high melting point resin sheet 1, respectively.
このヒンジ特性を有する高融点の樹脂シートとしてはポ
リエチレンテレフタレート、ナイロン、ポリカーボネ−
１−、ポリアセタール、ポリスエニレンオキサイド、４
−ふっ化エチレンなどが挙げられ、また低融点の樹脂シ
ートにはポリ塩化ビニル、ポリ塩化ビニリデン、ポリス
チレン、ポリエチレンなどが例示され名。High melting point resin sheets with this hinge property include polyethylene terephthalate, nylon, and polycarbonate.
1-, polyacetal, polyenylene oxide, 4
Examples of low melting point resin sheets include polyvinyl chloride, polyvinylidene chloride, polystyrene, and polyethylene.
なお、高融点の樹脂シートと低融点の樹脂シートとの一
方または両方は透明であることが望ましく、また高融点
の樹脂シートが０．０１〜０．１ｍｍの厚みであり、低
融点の樹脂シートが０．１〜２ｍｍの厚みであることが
好ましく、それぞれ適宜の厚みのものを組合せて使用す
ることができる。さらに上述したように、高融点の樹脂
シートとして厚みが０．０７５ｍｍのポリエチレンテレ
フタレートシートを採用し、その両面のそれぞれに厚み
が０ 、５ｍｍと０．２ＩＩＩｍのポリ塩化ビニルシー
トというように、同種だが厚みの異なる低融点の樹脂シ
ートを積層したもの、またはその片面に厚み０．５ｍｍ
のポリ塩化ビニルシート、他面に厚み０．２１１＋ｍの
ポリエチレンシートというように、異種で厚みも異なる
低融点の樹脂シートを積層したものなども使用すること
ができる。In addition, it is desirable that one or both of the high melting point resin sheet and the low melting point resin sheet be transparent, and the high melting point resin sheet has a thickness of 0.01 to 0.1 mm, and the low melting point resin sheet It is preferable that the thickness is 0.1 to 2 mm, and those having appropriate thicknesses can be used in combination. Furthermore, as mentioned above, a polyethylene terephthalate sheet with a thickness of 0.075 mm is used as the high melting point resin sheet, and polyvinyl chloride sheets with thicknesses of 0, 5 mm and 0.2 III m are used on both sides of the same type of resin sheet. Laminated low melting point resin sheets of different thicknesses, or 0.5mm thick on one side.
It is also possible to use a laminated sheet of different types of low melting point resin sheets with different thicknesses, such as a polyvinyl chloride sheet with a thickness of 0.211+m on the other side and a polyethylene sheet with a thickness of 0.211+m on the other side.
これらの積層（複合）シートはその低融点の樹脂シート
面側より線付け金型を用いて、超音波、熱バーなどの適
宜の加熱加圧手段により、折り返し線を入れるのである
が、以下その詳細を、この金型を例示した第２図、およ
び低融点の樹脂シート面側よりの線付け金型による作用
を解説した第３図に基づいて説明する。These laminated (composite) sheets are made with folding lines from the low-melting point resin sheet side using a line-forming mold and an appropriate heating and pressing means such as ultrasonic waves or a heat bar. The details will be explained based on FIG. 2, which illustrates this mold, and FIG. 3, which explains the effect of the line forming mold from the low melting point resin sheet surface side.
第２図において、１１はシリンダー、１２は架台、１３
は断熱材、１４は金型、１５はその線付け部、１６は定
盤で、３はこの定盤上に載置された積層（複合）シート
である。また、第３図において２および１はそれぞれ積
層シート３における低融点の樹脂シート層および高融点
の樹脂シート層である。In Fig. 2, 11 is a cylinder, 12 is a stand, and 13 is a cylinder.
14 is a heat insulating material, 14 is a mold, 15 is a wire-attached portion thereof, 16 is a surface plate, and 3 is a laminated (composite) sheet placed on this surface plate. Moreover, in FIG. 3, 2 and 1 are a low melting point resin sheet layer and a high melting point resin sheet layer in the laminated sheet 3, respectively.
今、高融点の樹脂シートとしてポリエチレンテレフタレ
ートシート（融点：２２０〜２３０℃）、低融点の樹脂
シートとしてはポリ塩化ビニルシート（融点＝１８０〜
２００℃）を用いた積層シートを試料として加工する場
合について説明すると、シリンダー１１の作用により金
型１４を下げ、１６０℃以上、好ましくは１８０℃に加
熱した線付け部１５を、この積層シート３に５ ｋｇ
／ ａＪの圧力で当てがうと、ポリエチレンテレフタレ
ートとポリ塩化ビニルとには３０〜４０℃の融点の差が
あるため、この差により金型１４は第３図（ａ）の位置
で止まり、低融点の樹脂シート層、すなわちポリ塩化ビ
ニルシート層２には折り返し線２０を形成するが、高融
点の樹脂シート層、すなわちポリエチレンテレフタレー
トシート層１は１８０℃の加熱に対しても変形すること
がなく、積層シート３は同図（ｂ）の断面形状のものと
なる。さらにこれを折り曲げるとポリエチレンテレフタ
レートはヒンジ特性に優れているため１図（ｃ）の形状
になる。Currently, polyethylene terephthalate sheets (melting point: 220-230°C) are used as high-melting point resin sheets, and polyvinyl chloride sheets (melting point = 180-230°C) are used as low-melting point resin sheets.
To explain the case where a laminated sheet using a temperature of 200° C.) is processed as a sample, the mold 14 is lowered by the action of the cylinder 11, and the wired part 15 heated to 160° C. or higher, preferably 180° C., is processed into the laminated sheet 3. 5 kg in
/aJ pressure, there is a difference in melting point between polyethylene terephthalate and polyvinyl chloride of 30 to 40°C, and this difference causes the mold 14 to stop at the position shown in Figure 3(a), resulting in a low melting point. The folding line 20 is formed on the resin sheet layer, that is, the polyvinyl chloride sheet layer 2, but the resin sheet layer with a high melting point, that is, the polyethylene terephthalate sheet layer 1 does not deform even when heated to 180 ° C. The laminated sheet 3 has a cross-sectional shape as shown in FIG. 3(b). When this is further bent, it becomes the shape shown in Figure 1(c) because polyethylene terephthalate has excellent hinge properties.
このように、本発明においては精度の比較的乏しい装置
や金型でも低融点の樹脂シート層の厚み分に相当する深
さの折り返し線を容易に付けることができる。In this way, in the present invention, even with a device or a mold with relatively poor precision, it is possible to easily form a fold line with a depth corresponding to the thickness of the low melting point resin sheet layer.
なお、線付け金型の加熱温度、加圧の程度および時間は
加工する積層シートの材料により任意に変更することが
でき、また線付け金型の先端形状も折り曲げ線の形状に
応じて任意に変更することができる。The heating temperature, degree of pressure, and time of the wire-forming mold can be changed arbitrarily depending on the material of the laminated sheet to be processed, and the shape of the tip of the wire-forming mold can also be changed arbitrarily according to the shape of the bending line. Can be changed.
さらに、第１図（ｂ）に示した積層シートの両面に折り
返し線を付けるときは、シートの両面から同時に金型を
押し付けて線材けすることもできる。Furthermore, when forming folding lines on both sides of the laminated sheet shown in FIG. 1(b), the wire can be formed by simultaneously pressing molds from both sides of the sheet.
次に、本発明の具体的態様を実施例により説明する。Next, specific aspects of the present invention will be explained using examples.
（実施例）
第２図に示した金型に厚み０．７ｍｍ、幅７０ｍｍ、先
端部のＲが０．３５ｍｍの線付け用のバーを装着し、こ
れに厚み０．４ｍｍの硬質ポリ塩化ビニルシートと厚み
０．０７５ｍｍのポリエチレンテレフタレートシートと
の積層シートを、硬質ポリ塩化ビニル層を上にして取り
付け、熱バー温度２００℃、加熱時間２秒。(Example) A line bar with a thickness of 0.7 mm, a width of 70 mm, and a tip R of 0.35 mm is attached to the mold shown in Fig. 2, and a hard polyvinyl chloride with a thickness of 0.4 mm is attached to the mold. A laminated sheet of the sheet and a polyethylene terephthalate sheet with a thickness of 0.075 mm was attached with the hard polyvinyl chloride layer facing upward, and the heating bar temperature was 200° C. and the heating time was 2 seconds.
周波数２０サイクル／分、５ ｋｇ／ｃｄで加圧したと
ころ、ポリ塩化ビニルシート層の厚み０．４ｍ＋ｉに相
当する深さの折り返し線が積層シート面に付いた。When the pressure was applied at a frequency of 20 cycles/min and a pressure of 5 kg/cd, fold lines with a depth corresponding to the thickness of the polyvinyl chloride sheet layer of 0.4 m+i were formed on the surface of the laminated sheet.
この積層シートを９０°折り曲げて包装容器に組み立て
た。この容器の折り曲げ部はヒンジ特性のよいポリエチ
レンテレフタレートシート層で形成されているため、外
角がシャープで見ばえのよいものであった。This laminated sheet was bent 90 degrees and assembled into a packaging container. Since the folded portion of this container was formed from a polyethylene terephthalate sheet layer with good hinge characteristics, the outer corners were sharp and the container had a good appearance.
（発明の効果）
本発明によれば、
■精度の比較的乏しい、加熱・加圧機構を備えた装置や
金型でも低融点の樹脂シート層の厚み分に相当する深さ
の折り返し線を容易に付けることができる。(Effects of the Invention) According to the present invention, it is possible to easily form a fold line with a depth equivalent to the thickness of a low-melting point resin sheet layer even with equipment or molds equipped with a heating/pressure mechanism with relatively poor precision; can be attached to.
（のシートの厚みが０ 、３ｍｍ以上あっても加工に支
障がなく、例えば樹脂シートの厚みが２．１５ｍｍでも
可能であり、その結果１０００ｍｍ Ｘ １０００ｍｍ
Ｘ １０００ｎｕ＋＋程度の大きさの包装容器の製作
ができる。(There is no problem in processing even if the thickness of the sheet is 0.3 mm or more, for example, it is possible even if the thickness of the resin sheet is 2.15 mm, and as a result, 1000 mm x 1000 mm.
We can manufacture packaging containers with a size of approximately 1000 nu++.
■耐折性（ヒンジ特性）に富み、かつ折り返しが容易で
あるため包装容器への組立て作業性がよく。■It has excellent bending durability (hinge characteristics) and is easy to fold back, making it easy to assemble into packaging containers.
また得られる容器の耐久性にも優れている。The resulting container also has excellent durability.
図面はいずれも本発明の実施例に係わり、第１図（ａ）
〜（ｃ）はそれぞれ本発明で用いられる積層シートの異
なる態様を示す断面説明図、第２図は本発明に適用され
る金型の一実施例、第３図（ａ）〜（ｃ）はそれぞれ金
型を用いて積層シートに折り返し線を付けた後、これを
折り曲げるまでの各段階における積層シートの状態を示
す断面説明図である。
（主要な符号の説明）
１ ：高融点の樹脂シート。
２．５ ：低融点の樹脂シート、
３．４．６：積層シート。
１５：線付け金型、
２０：折り返し線。
（ａ）
（ｂ）
（ｃ）
（ａ）
（ｂ）
（ｃ）All drawings relate to embodiments of the present invention, and FIG. 1(a)
~(c) are cross-sectional explanatory views showing different aspects of the laminated sheet used in the present invention, Figure 2 is an example of a mold applied to the present invention, and Figures 3(a)~(c) are FIG. 3 is an explanatory cross-sectional view showing the state of the laminated sheet at each stage from the time when a folding line is attached to the laminated sheet using a mold until the sheet is bent. (Explanation of main symbols) 1: High melting point resin sheet. 2.5: Low melting point resin sheet, 3.4.6: Laminated sheet. 15: Line forming mold, 20: Folding line. (a) (b) (c) (a) (b) (c)
Claims (1)
は両面に、これよりも２０℃以上低融点の同種または異
種の樹脂シートを積層し、この低融点の樹脂シート面側
より線付け金型を用いて、超音波、熱バーなどの適宜の
加熱加圧手段により、折り返し線を入れることを特徴と
する積層シートに折り返し線を付ける方法。 ２、高融点の樹脂シートが、ポリエチレンテレフタレー
ト、ナイロン、ポリカーボネート、ポリアセタール、ポ
リフェニレンオキサイド、または４−ふっ化エチレンか
らなり、低融点の樹脂シートが、ポリ塩化ビニル、ポリ
塩化ビニリデン、ポリスチレン、またはポリエチレンか
らなる特許請求の範囲第１項記載の積層シートに折り返
し線を付ける方法。 ３、高融点の樹脂シートが、０．０１〜０．１ｍｍの厚
みであり、低融点の樹脂シートが、０．１〜２ｍｍの厚
みである特許請求の範囲第１項または第２項のいずれか
に記載の積層シートに折り返し線を付ける方法。 ４、高融点の樹脂シートと低融点の樹脂シートとの一方
または両方が透明である特許請求の範囲第１項ないし第
３項のいずれかに記載の積層シートに折り返し線を付け
る方法。[Scope of Claims] 1. A resin sheet of the same or different type having a melting point 20°C or more lower than this is laminated on one or both sides of a high melting point resin sheet having hinge characteristics, and the side of this low melting point resin sheet is laminated. A method for attaching folding lines to a laminated sheet, which comprises inserting folding lines using a stranded line forming mold using appropriate heating and pressing means such as ultrasonic waves or a heat bar. 2. The high melting point resin sheet is made of polyethylene terephthalate, nylon, polycarbonate, polyacetal, polyphenylene oxide, or 4-fluoroethylene, and the low melting point resin sheet is made of polyvinyl chloride, polyvinylidene chloride, polystyrene, or polyethylene. A method for forming folding lines on a laminated sheet according to claim 1. 3. Either claim 1 or 2, wherein the high melting point resin sheet has a thickness of 0.01 to 0.1 mm, and the low melting point resin sheet has a thickness of 0.1 to 2 mm. How to add folding lines to a laminated sheet as described in . 4. A method for forming folding lines on a laminated sheet according to any one of claims 1 to 3, wherein one or both of the high melting point resin sheet and the low melting point resin sheet are transparent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28686787A JPH01128823A (en) | 1987-11-13 | 1987-11-13 | Method for making fold line on laminated sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28686787A JPH01128823A (en) | 1987-11-13 | 1987-11-13 | Method for making fold line on laminated sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01128823A true JPH01128823A (en) | 1989-05-22 |
Family
ID=17710036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28686787A Pending JPH01128823A (en) | 1987-11-13 | 1987-11-13 | Method for making fold line on laminated sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01128823A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006137476A (en) * | 2004-11-15 | 2006-06-01 | Toppan Printing Co Ltd | Clear case and method for manufacturing it |
| JP2018538159A (en) * | 2015-10-01 | 2018-12-27 | オナク ビーブイビーエー | Foldable structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5430707A (en) * | 1977-08-12 | 1979-03-07 | Hitachi Ltd | Six-wire switching system |
| JPS54137077A (en) * | 1978-04-17 | 1979-10-24 | Dainippon Printing Co Ltd | Packaging material and its manufacturing |
| JPS6137092A (en) * | 1984-07-30 | 1986-02-21 | Osaka Gas Co Ltd | Method of cultivation of euglena cell |
-
1987
- 1987-11-13 JP JP28686787A patent/JPH01128823A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5430707A (en) * | 1977-08-12 | 1979-03-07 | Hitachi Ltd | Six-wire switching system |
| JPS54137077A (en) * | 1978-04-17 | 1979-10-24 | Dainippon Printing Co Ltd | Packaging material and its manufacturing |
| JPS6137092A (en) * | 1984-07-30 | 1986-02-21 | Osaka Gas Co Ltd | Method of cultivation of euglena cell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006137476A (en) * | 2004-11-15 | 2006-06-01 | Toppan Printing Co Ltd | Clear case and method for manufacturing it |
| JP2018538159A (en) * | 2015-10-01 | 2018-12-27 | オナク ビーブイビーエー | Foldable structure |
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