JPH0499614A - Method and device for folding thermoset resin sheet - Google Patents
Method and device for folding thermoset resin sheetInfo
- Publication number
- JPH0499614A JPH0499614A JP16642090A JP16642090A JPH0499614A JP H0499614 A JPH0499614 A JP H0499614A JP 16642090 A JP16642090 A JP 16642090A JP 16642090 A JP16642090 A JP 16642090A JP H0499614 A JPH0499614 A JP H0499614A
- Authority
- JP
- Japan
- Prior art keywords
- resin sheet
- thermoplastic resin
- folding
- sheet
- bending
- 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
- 238000000034 method Methods 0.000 title claims description 23
- 239000004634 thermosetting polymer Substances 0.000 title 1
- 238000005452 bending Methods 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 claims abstract description 15
- 229920005992 thermoplastic resin Polymers 0.000 claims description 66
- 239000000088 plastic resin Substances 0.000 abstract description 4
- 230000002087 whitening effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical class ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、熱可塑性樹脂シートの製造、特には、各種包
装用ケース等に使用される熱可塑性樹脂シートの折曲方
法及び折曲装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to the production of thermoplastic resin sheets, and in particular to methods and devices for folding thermoplastic resin sheets used in various packaging cases, etc. It is something.
［従来の技術］
比較的厚く、かつ硬質の熱可塑性樹脂シートの折曲加工
は、通常、当該熱可塑性樹脂シート１をある程度加熱し
て軟化させた状態で行われるが、熱可塑性樹脂シートは
加熱するとその表面にしわが形成されたり、その寸法に
くるいが生しるという問題点があった。[Prior Art] Bending of a relatively thick and hard thermoplastic resin sheet is usually performed after the thermoplastic resin sheet 1 is heated to some extent to soften it. This poses a problem in that wrinkles are formed on the surface and irregularities occur in the dimensions.
他方、冷間ないしは比較的低い温度すなわち熱可塑性樹
脂シートの軟化点未満の温度で折曲加工を行った場合に
は、十分に折り曲げることができず折り曲げがあまくな
ってしまうほか、折曲部が白くなるという白化現象が起
こるという問題点があり、これにはまた加工時間が長く
かかるという問題点もあった。また、折曲部付近のみを
熱可塑性樹脂シートの軟化点まで加熱して折曲加工を行
う方法もあるが、この場合も、シート厚がある程度以上
ある熱可塑性樹脂シートの場合には、上記の問題が依然
として解決されず、精度の点でも問題があった。On the other hand, if the bending process is performed cold or at a relatively low temperature, that is, at a temperature below the softening point of the thermoplastic resin sheet, the bending process will not be sufficient and the bending will be loose, and the bent portion will be There is a problem in that a whitening phenomenon occurs, and this also has the problem of requiring a long processing time. There is also a method of bending by heating only the vicinity of the bending part to the softening point of the thermoplastic resin sheet, but in this case as well, in the case of a thermoplastic resin sheet with a certain thickness or more, the above-mentioned The problem remained unresolved and there were also problems with accuracy.
［発明が解決しようとする課題］
本発明は、上記従来技術の問題点にかんがみ、シート厚
がある程度以上ある硬質の熱可塑性樹脂シートの折曲加
工を冷間で行っても、折り曲げがあまくなったり、折曲
部が白化現象を起こしたすせず、精度良く、かつ−加工
時間も短い熱可塑性樹脂シートの折曲方法及び折曲装置
を提供することを目的としている。[Problems to be Solved by the Invention] In view of the problems of the prior art described above, the present invention solves the problem that even if a hard thermoplastic resin sheet having a sheet thickness of a certain thickness or more is cold-folded, the bending is not easy. It is an object of the present invention to provide a method and device for folding a thermoplastic resin sheet, which does not cause whitening of the folded portion, has high precision, and has a short processing time.
［課題を解決するための手段］
上記目的を達成するために、本発明の熱可塑性樹脂シー
トの折曲方法は、熱可塑性樹脂シートを断面コ状に折り
曲げる際に、折曲線上を加熱した後、熱可塑性樹脂シー
トの１端面が折曲部をはさんで当該熱可塑性樹脂シート
面とほぼ平行になるよう折り曲げるようにした熱可塑性
樹脂シートの折り曲げ方法である。[Means for Solving the Problems] In order to achieve the above object, the thermoplastic resin sheet bending method of the present invention includes heating the folding line when bending the thermoplastic resin sheet into a U-shaped cross section. , is a method of folding a thermoplastic resin sheet in which one end surface of the thermoplastic resin sheet is bent so as to be substantially parallel to the surface of the thermoplastic resin sheet across a bending part.
また、本発明の熱可塑性樹脂シートの折曲装置は、熱可
塑性樹脂シートの載置台と、該載置台に移動可能に設け
られた熱可塑性樹脂シートの折曲線上を加熱する加熱部
材と、熱可塑性樹脂シートの折曲部の折曲部を規定する
規制板と、該規正板に沿って熱可塑性樹脂シートを折り
曲げる折曲部材からなり、さらに必要に応じて、上記加
熱部材及び折曲部材とをそれぞれ複数備え、熱可塑性樹
脂シートの少なくとも２端を同時に折り曲げることがで
きるようにした熱可塑性樹脂シートの折曲装置である。Further, the thermoplastic resin sheet folding device of the present invention includes a thermoplastic resin sheet mounting table, a heating member movably provided on the mounting table that heats the folding line of the thermoplastic resin sheet, and a thermoplastic resin sheet folding device. It consists of a regulation plate that defines the bending part of the plastic resin sheet, and a bending member that bends the thermoplastic resin sheet along the regulation plate, and if necessary, the heating member and the bending member. A thermoplastic resin sheet folding device is provided with a plurality of thermoplastic resin sheet folding devices, each of which is equipped with a plurality of thermoplastic resin sheet folding devices, and is capable of simultaneously folding at least two ends of a thermoplastic resin sheet.
［実施例］ 実施例について図面を参照して説明する。[Example] Examples will be described with reference to the drawings.
第１図及び第２図は、本発明に係る折曲装置であり、当
該装置は、熱可塑性樹脂シート】を載置するｉ！載置台
と、該ａ１台２に移動可能に設けられた熱可塑性樹脂シ
ート１を加熱する加熱部材８と、熱可塑性ＦＭ脂レシー
ト折曲部の折曲部を規定する規正板４と、該規正板４に
沿って熱可塑性樹脂シート１を折り曲げる折曲部材５と
、該折曲部材５の上部に設けられた熱可塑性樹脂シート
１の位置決め部材３と、上記折曲部材５、加熱部材８及
び規正板４を動かす油圧や空気圧により作動するアクチ
ュエータ１１．１２．１３．１４とからなっている。FIGS. 1 and 2 show a folding device according to the present invention, which is used to place a thermoplastic resin sheet. A mounting table, a heating member 8 that heats the thermoplastic resin sheet 1 movably provided on the a1 table 2, a regulating plate 4 that defines the bending part of the thermoplastic FM resin receipt folding part, and the regulating plate 4. A folding member 5 for folding the thermoplastic resin sheet 1 along the plate 4, a positioning member 3 for the thermoplastic resin sheet 1 provided on the upper part of the folding member 5, the folding member 5, the heating member 8, and It consists of actuators 11, 12, 13, and 14 operated by hydraulic pressure or air pressure to move the regulating plate 4.
本発明の方法を第３図及び第４図に基づいて説明すると
、まず、第３図（ａ）に示すように、折り曲げを目的と
する熱可塑性樹脂シート１を載置台２上に載せ、当該熱
可塑性樹脂シート１を折曲部材５に設けた位置決め部材
３を使用し、アクチュエタ１２り操作することにより所
定位置に設置する。つぎに、第３図（し及び第４［２１
に示すように、規正板４をアクチュエータ１４を操作し
て熱可塑性樹脂シートｌの上部に重ね、これによって、
熱可塑性樹脂シート１が動かないように固定する。The method of the present invention will be explained based on FIGS. 3 and 4. First, as shown in FIG. 3(a), a thermoplastic resin sheet 1 to be bent is placed on a mounting table 2, and the The thermoplastic resin sheet 1 is installed at a predetermined position by operating the actuator 12 using the positioning member 3 provided on the bending member 5. Next, see Figures 3 and 4 [21
As shown in , the regulating plate 4 is stacked on top of the thermoplastic resin sheet l by operating the actuator 14, thereby,
Fix the thermoplastic resin sheet 1 so that it does not move.
そして、断面コ状の端部ｌＯと有する加熱部材８をアク
チュエータ１３ｆ！：操作して熱可塑性樹脂シート１の
折曲部６に当接させて当該熱可塑性樹脂シート１の折曲
線７上を加熱する。ついで、第３図（ｃ）に示すように
、折曲部材５をアクチュエータ１１を操作して折曲部材
５の下面が熱可塑性樹脂シート１の折曲部６の厚さと同
じになる位置まで上昇させる。これによって、熱可塑性
樹脂シート１は規正板４ｇ！の折曲線７に沿って折り曲
げられることとなる。その後、第３図（社）に示すよう
に、折曲部材５をアクチュエータ１２と操作して水平に
移動させることにより、熱可塑性樹脂シート１の１端面
が折曲部６をはさんで当該熱可塑性樹脂シート面とほぼ
平行になるよう折り曲げる。この折り曲げは、規正板４
に沿って行われるので、折曲部６は２規正板４の外形に
沿った断面コ状に精度よく形成される。なお、この工程
が終了した後、折曲部材５でアクチュエータ１１を操作
して熱可塑性樹脂シート１を上方より押圧すると、さら
に折曲部６の寸法精度が良くなる。Then, the heating member 8 having the end lO having a U-shaped cross section is connected to the actuator 13f! : The thermoplastic resin sheet 1 is brought into contact with the folded portion 6 of the thermoplastic resin sheet 1 to heat the folded line 7 of the thermoplastic resin sheet 1. Next, as shown in FIG. 3(c), the actuator 11 is operated to raise the bending member 5 to a position where the lower surface of the bending member 5 is equal to the thickness of the bent portion 6 of the thermoplastic resin sheet 1. let As a result, the thermoplastic resin sheet 1 weighs only 4 grams of regulating plate! It will be folded along the folding line 7. Thereafter, as shown in FIG. 3, by operating the bending member 5 with the actuator 12 and moving it horizontally, one end surface of the thermoplastic resin sheet 1 is sandwiched between the bending parts 6 and the heat is applied. Bend it so that it is almost parallel to the plastic resin sheet surface. This bending is done using the regulating plate 4.
Since the bending portion 6 is formed along the outer shape of the second regulating plate 4, the bending portion 6 is precisely formed to have a U-shaped cross section along the outer shape of the second regulating plate 4. Note that after this step is completed, if the bending member 5 operates the actuator 11 to press the thermoplastic resin sheet 1 from above, the dimensional accuracy of the bending portion 6 will be further improved.
以上、熱可塑性樹脂シート１の１端を折り曲げる方法に
ついて説明したが、第２図に示すように、加熱部材８及
び折曲部材５をそれぞれ複数備え、熱可塑性樹脂シート
１の少なくと６２端を同時に折り曲げるようにすること
も可能である。なお、方形の熱可塑性樹脂シート１の４
端を同時に折り曲げる際には、第５図に示すように規正
板４を分割して構成しておき、熱可塑性樹脂シート１の
成型後取り外すことができるようにしておく必要がある
。The method for bending one end of the thermoplastic resin sheet 1 has been described above, but as shown in FIG. It is also possible to bend them at the same time. In addition, the rectangular thermoplastic resin sheet 1-4
When bending the ends at the same time, it is necessary to divide the regulating plate 4 into parts as shown in FIG. 5 so that it can be removed after the thermoplastic resin sheet 1 is molded.
本発明に用いられる加熱部材８は、第６図に示すような
形状、構造を有するものであり、加熱部材端部１０は、
熱可塑性樹脂シート１の折曲１１７上を加熱できるよう
に、断面コ状をしている。加熱部材１０の厚さｔは、規
正板４の厚さとほぼ等しくすることが好ましく、また、
加熱部材端部１０の加熱部の厚さｔｌは、加熱部材１０
の厚さｔが５謳の場合には、０゜５ｎ＋ｍ程度とするの
が適当であるが、これは、熱可塑性樹脂シート１の材質
及びシートの厚さ、折曲部６の厚さ、外気温度等により
調整するのが好ましい、また、加熱部材５には、その適
宜の位置に加熱部材５を内部から加熱するためのヒータ
９が埋設されている。ヒータ９には、シーズヒータ、棒
状ヒータ等を用いるのが適当である。The heating member 8 used in the present invention has a shape and structure as shown in FIG.
It has a U-shaped cross section so that the bend 117 of the thermoplastic resin sheet 1 can be heated. It is preferable that the thickness t of the heating member 10 is approximately equal to the thickness of the regulating plate 4, and
The thickness tl of the heating portion of the heating member end portion 10 is the thickness tl of the heating member 10.
When the thickness t is 5 mm, it is appropriate to set it to about 0°5n+m, but this depends on the material and thickness of the thermoplastic resin sheet 1, the thickness of the folded part 6, and the outside air. It is preferable to adjust the temperature by adjusting the temperature or the like, and a heater 9 for heating the heating member 5 from inside is embedded in the heating member 5 at an appropriate position. As the heater 9, it is appropriate to use a sheathed heater, a rod-shaped heater, or the like.
本発明方法及び装置で製造された熱可塑性樹脂シート製
品を第７図に示す８本発明が適用できる熱可塑性樹脂シ
ートとしては、硬質又は半硬質の熱可塑性樹脂シート〜
例えば、ポリ塩化ビニル、塩素化塩化ビニル樹脂、ポリ
ビニルアルコール、酢酸ビニル、ポリプロピレン等の合
成樹脂シートがあり、また、当該熱可塑性樹脂シートの
シートの厚さには特に制限はないが、０．０５〜２．Ｏ
Ｍの厚さのものが好ましい６
［発明の効果］
本発明に係る熱可塑性樹脂シートの折曲方法及び折曲装
置によれば、熱可塑性樹脂シートの折り曲げを精度よく
行うことができ、また、折曲部が白化せず見栄えもよい
、また、製品の製造を短時間で行うことができ、特に同
時に複数箇所の折り曲げを行うことが可能であるため２
作業効率をさらに向上することができる。さらに、本発
明の方法及び装置は、種々の硬質又は半硬質の熱可塑性
樹脂シートに適用可能であり、当該熱可塑性樹脂シート
のシートの厚さには特に制限はない。Thermoplastic resin sheet products manufactured by the method and apparatus of the present invention are shown in FIG.
For example, there are synthetic resin sheets such as polyvinyl chloride, chlorinated vinyl chloride resin, polyvinyl alcohol, vinyl acetate, and polypropylene, and there is no particular limit to the thickness of the thermoplastic resin sheet, but 0.05 ~2. O
Preferably, the thickness is M6. [Effects of the Invention] According to the method and device for folding a thermoplastic resin sheet according to the present invention, the thermoplastic resin sheet can be folded with high precision, and The folded part does not whiten and looks good, and the product can be manufactured in a short time, especially since it is possible to bend multiple places at the same time.
Work efficiency can be further improved. Furthermore, the method and apparatus of the present invention can be applied to various rigid or semi-rigid thermoplastic resin sheets, and there are no particular limitations on the thickness of the thermoplastic resin sheet.
これらのことから、本発明に係る熱可塑性樹脂シートの
折曲方法及び折曲装置は、例えば、各種包装用ケースの
ほかプラスチック封筒、レコードジャケット、カレンダ
ーケース等の製造に広く使用することが可能である。For these reasons, the thermoplastic resin sheet folding method and folding device according to the present invention can be widely used, for example, in the production of various packaging cases, as well as plastic envelopes, record jackets, calendar cases, etc. be.
第１図は本発明に係る熱可塑性樹脂シートの折曲装置の
要部正面図、第２図は同全体正面図、第３図は本発明に
よる熱可塑性樹脂シートの折曲方法の工程図、第４図は
同工程のうち加熱工程の詳細工程図、第５（２１は本発
明に使用される加熱部材の正面図、第６図は本発明に使
用される規正板の実施例を示す平面図、第７図は本発明
方法及び装置で！８！遺された熱可塑性樹脂シート製品
の斜視図及びその断面図である。
１ 熱可塑性樹脂シート
２ 載置台
３ 位置決め部材
４ 規正板
５ 折曲部材
６ 折曲部
７ 折曲線
８ 加熱部材
９ ヒータ
１０ 加熱部材端部
１１．１２．１３．１４ アクチュエータ才
！
可
第３
別
手続補正書
（方式）
％式％
熱可塑性１！１ｆｆｉシ
トの折曲方法及び折曲装置
３、補正をする者
事件とのｇｌＩ係FIG. 1 is a front view of essential parts of a thermoplastic resin sheet folding device according to the present invention, FIG. 2 is an overall front view of the same, and FIG. 3 is a process diagram of a thermoplastic resin sheet folding method according to the present invention. Figure 4 is a detailed process diagram of the heating step in the same process, Figure 5 (21 is a front view of the heating member used in the present invention, and Figure 6 is a plan view showing an example of the regulating plate used in the present invention). 7 are a perspective view and a sectional view of a thermoplastic resin sheet product left behind by the method and apparatus of the present invention. 1. Thermoplastic resin sheet 2. Placing table 3. Positioning member 4. Regulating plate 5. Bending Member 6 Bending part 7 Folding line 8 Heating member 9 Heater 10 Heating member end 11.12.13.14 Actuator size! Possible No. 3 Separate procedure amendment form (method) % formula % Thermoplastic 1! 1ffi sheet bending Method and folding device 3, GLI relationship with the person making the amendment
Claims (1)
際に、折曲線（７）上を加熱した後、熱可塑性樹脂シー
ト（１）の１端面が折曲部（６）をはさんで当該熱可塑
性樹脂シート面とほぼ平行になるよう折り曲げることを
特徴とする熱可塑性樹脂シートの折曲方法。 ２、熱可塑性樹脂シート（１）の載置台（２）と、該載
置台（２）に移動可能に設けられた熱可塑性樹脂シート
（１）の折曲線（７）上を加熱する加熱部材（８）と、
熱可塑性樹脂シート（１）の折曲部（６）の厚さを規定
する規制板（４）と、該規正板（４）に沿って熱可塑性
樹脂シート（１）を折り曲げる折曲部材（５）とからな
ることを特徴とする熱可塑性樹脂シートの折曲装置。 ３、加熱部材（８）及び折曲部材（５）とをそれぞれ複
数備え、熱可塑性樹脂シート（１）の少なくとも２端を
同時に折り曲げるようにしたことを特徴とする請求項２
記載の熱可塑性樹脂シートの折曲装置。[Claims] 1. When bending the thermoplastic resin sheet (1) into a U-shaped cross section, after heating the folding line (7), one end surface of the thermoplastic resin sheet (1) forms a bent portion ( 6) A method for folding a thermoplastic resin sheet, which comprises folding the thermoplastic resin sheet so that it is substantially parallel to the surface of the thermoplastic resin sheet. 2. A mounting table (2) for the thermoplastic resin sheet (1), and a heating member for heating the folding line (7) of the thermoplastic resin sheet (1) movably provided on the mounting table (2). 8) and
A regulating plate (4) that defines the thickness of the bent portion (6) of the thermoplastic resin sheet (1), and a bending member (5) that bends the thermoplastic resin sheet (1) along the regulating plate (4). ) A thermoplastic resin sheet folding device comprising: 3. Claim 2, characterized in that a plurality of heating members (8) and a plurality of bending members (5) are provided, and at least two ends of the thermoplastic resin sheet (1) are bent at the same time.
The thermoplastic resin sheet folding device described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2166420A JPH0780237B2 (en) | 1990-06-25 | 1990-06-25 | Bending method and folding device for thermoplastic resin sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2166420A JPH0780237B2 (en) | 1990-06-25 | 1990-06-25 | Bending method and folding device for thermoplastic resin sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0499614A true JPH0499614A (en) | 1992-03-31 |
| JPH0780237B2 JPH0780237B2 (en) | 1995-08-30 |
Family
ID=15831097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2166420A Expired - Lifetime JPH0780237B2 (en) | 1990-06-25 | 1990-06-25 | Bending method and folding device for thermoplastic resin sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0780237B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1014358A5 (en) * | 2001-09-04 | 2003-09-02 | Euro Shadow Construct Machb | Border locking device, especially for carpets, comprises ultrasonic heating device and pressure application device |
| KR100449542B1 (en) * | 2002-02-08 | 2004-09-22 | (주) 대경프라스틱 | a |
| KR100751711B1 (en) * | 2006-08-24 | 2007-08-23 | 주식회사 휘닉스 디지탈테크 | Automatic tape bending & setting system |
| JP2011095707A (en) * | 2009-09-29 | 2011-05-12 | Sekisui Plastics Co Ltd | Method of folding light reflection sheet and light reflection plate |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103448236A (en) * | 2013-09-04 | 2013-12-18 | 苏州雅妮服务外包有限公司 | Novel acrylic bending machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5363358U (en) * | 1976-10-27 | 1978-05-29 | ||
| JPS5693513A (en) * | 1979-12-12 | 1981-07-29 | Verbatim Corp | Manufacture of thin polymer sheet article |
| JPS60210424A (en) * | 1984-04-04 | 1985-10-22 | Denki Kagaku Kogyo Kk | Method and apparatus for bending thermoplastic resin sheet and box making process |
-
1990
- 1990-06-25 JP JP2166420A patent/JPH0780237B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5363358U (en) * | 1976-10-27 | 1978-05-29 | ||
| JPS5693513A (en) * | 1979-12-12 | 1981-07-29 | Verbatim Corp | Manufacture of thin polymer sheet article |
| JPS60210424A (en) * | 1984-04-04 | 1985-10-22 | Denki Kagaku Kogyo Kk | Method and apparatus for bending thermoplastic resin sheet and box making process |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1014358A5 (en) * | 2001-09-04 | 2003-09-02 | Euro Shadow Construct Machb | Border locking device, especially for carpets, comprises ultrasonic heating device and pressure application device |
| KR100449542B1 (en) * | 2002-02-08 | 2004-09-22 | (주) 대경프라스틱 | a |
| KR100751711B1 (en) * | 2006-08-24 | 2007-08-23 | 주식회사 휘닉스 디지탈테크 | Automatic tape bending & setting system |
| JP2011095707A (en) * | 2009-09-29 | 2011-05-12 | Sekisui Plastics Co Ltd | Method of folding light reflection sheet and light reflection plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0780237B2 (en) | 1995-08-30 |
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