JPH0342230A - Method and apparatus for molding folding-back line part in thermoplastic resin sheet - Google Patents
Method and apparatus for molding folding-back line part in thermoplastic resin sheetInfo
- Publication number
- JPH0342230A JPH0342230A JP17679189A JP17679189A JPH0342230A JP H0342230 A JPH0342230 A JP H0342230A JP 17679189 A JP17679189 A JP 17679189A JP 17679189 A JP17679189 A JP 17679189A JP H0342230 A JPH0342230 A JP H0342230A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- thermoplastic resin
- resin sheet
- flat surface
- tool
- 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
- 229920005992 thermoplastic resin Polymers 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 5
- 238000000465 moulding Methods 0.000 title claims abstract 11
- 239000002356 single layer Substances 0.000 claims abstract description 12
- 230000005684 electric field Effects 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims abstract description 5
- 229920001169 thermoplastic Polymers 0.000 claims description 7
- 239000004416 thermosoftening plastic Substances 0.000 claims description 7
- 239000011265 semifinished product Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 239000000088 plastic resin Substances 0.000 description 1
Landscapes
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
PURPOSE:To mold a folding-back line part to a thermoplastic resin sheet by keeping a molding tool to temp. higher than the melting temp. of a single-layer thermoplastic resin sheet and applying an electric field of high frequency between the molding tool and a flat surface and pushing the molding tool in the sheet up to the specific depth in the thickness direction thereof to cool the sheet. CONSTITUTION:A single layer thermoplastic resin sheet is arranged between at least one molding tool and a substantially flat surface and the molding tool is held to temp. higher than the single layer thermoplastic resin sheet and a high frequency electric field is applied between the molding tool and the flat surface in order to heat the single layer thermoplastic resin sheet therebetween and the molding tool is pushed in the sheet at least up to a depth of 25% in the thickness direction of the sheet and the sheet is cooled during a time when the sheet keeps a substantially flat state. By this method, a folding-back line part can be formed in the thermoplastic resin sheet for the preparation of a semimanufactured box-shaped product.
Description
【発明の詳細な説明】
本発明は熱可塑性樹脂シートに折り返し線部分を成形す
る方法及び装置に関するものであって、熱可塑性樹脂シ
ートに可続性に富む折り返し線部分を成形するものに訃
いて、少くとも１つの成形工具と実質的に平坦な面の間
に単層の熱可塑性樹脂シートを配置し、前記成形工具を
前記単層の熱可塑性樹脂シートの溶融温度より高い温度
に維持し、前記成形工具と平坦面との間で単層の熱可塑
性樹脂シートを加熱するためにその間に高周波数の電界
を付与し、前記成形工具を前記シートの厚さの少くとも
２５多の深さプで押入し、前記シートが実質的に平坦な
状態を維持している間にそのシートを冷却する工程より
なシ、箱形の半製品をつくるために熱町盟性樹脂シート
に折り返し線部分を成形する方法並びに熱可塑性樹脂シ
ートに可続性に富む折り返し線部分を成形するものにお
いて、成形工具と、実質的に平坦な面と、前記工具と実
質的に平坦な面との間で高周波数の電界を発生させる手
段と、前記工具を前記の熱可塑性樹脂シートの溶融温度
よう高い温度に加熱する手段と、前記工具を前記実質的
に平坦な面に向って動かし、その工具によう前記実質的
に平坦な面上に訃かれた単層の熱可塑性樹脂に押圧くぼ
みを形成させる手段とを具備してなり、箱形の半製品を
つくるために熱５Ｔ塑性樹脂シートに折り返し線部分を
成形する装置を要旨とするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for forming folded line portions on a thermoplastic resin sheet, and is particularly suited for forming folded line portions with high fusibility on a thermoplastic resin sheet. , disposing a single layer thermoplastic sheet between at least one forming tool and a substantially flat surface, and maintaining the forming tool at a temperature above the melting temperature of the single layer thermoplastic sheet; applying a high frequency electric field between the forming tool and a flat surface to heat a single layer thermoplastic sheet; In order to create a box-shaped semi-finished product, fold line portions are formed on a thermoplastic resin sheet to create a box-shaped semi-finished product. In a method for forming a highly flexible fold line portion in a thermoplastic resin sheet, a high frequency is applied between a forming tool and a substantially flat surface; means for generating an electric field of; means for heating the tool to a temperature as high as the melting temperature of the thermoplastic sheet; and moving the tool toward the substantially flat surface so as to cause the tool to and a means for forming pressing depressions in a single layer of thermoplastic resin laid down on a flat surface, and forming a folding line part on a thermal 5T plastic resin sheet to produce a box-shaped semi-finished product. The gist of this article is a device that does this.
Claims (1)
を成形するものにおいて、少くとも１つの成形工具と実
質的に平坦な面の間に単層の熱可塑性樹脂シートを配置
し、前記成形工具を前記単層の熱可塑性樹脂シートの溶
融温度より高い温度に維持し、前記成形工具と平坦面と
の間で単層の熱可塑性樹脂シートを加熱するためにその
間に高周波数の電界を付与し、前記成形工具を前記シー
トの厚さの少くとも２５％の深さまで押入し、前記シー
トが実質的に平坦な状態を維持している間にそのシート
を冷却する工程よりなり、箱形の半製品をつくるために
熱可塑性樹脂シートに折り返し線部分を成形する方法。 ２、熱可塑性樹脂シートに可撓性に富む折サ返し線部分
を成形するものにおいて、成形工具と、実質的に平坦な
面と、前記工具と実質的に平坦な面との間で高周波数の
電界を発生させる手段と、前記工具を前記の熱可塑性樹
脂シートの溶融温度より高い温度に加熱する手段と、前
記工具を前記実質的に平坦な面に向つて動かし、その工
具により前記実質的に平坦な面上におかれた単層の熱可
塑性樹脂に押圧くぼみを形成させる手段とを具備してな
り、箱形の半製品をつくるために熱可塑性樹脂シートに
折り返し線部分を成形する装置。[Scope of Claims] 1. In a device for molding a highly flexible fold line portion on a thermoplastic resin sheet, a single layer of the thermoplastic resin sheet is provided between at least one molding tool and a substantially flat surface. and maintaining the forming tool at a temperature higher than the melting temperature of the single-layer thermoplastic sheet, and heating the single-layer thermoplastic sheet between the forming tool and a flat surface. applying a high frequency electric field, driving the forming tool to a depth of at least 25% of the thickness of the sheet, and cooling the sheet while the sheet remains substantially flat; A method of forming folded lines on a thermoplastic resin sheet to create a box-shaped semi-finished product. 2. In molding a highly flexible folded line portion on a thermoplastic resin sheet, a high frequency means for generating an electric field of; means for heating the tool to a temperature above the melting temperature of the thermoplastic sheet; and moving the tool toward the substantially flat surface so as to cause the tool to and a means for forming pressing depressions in a single layer of thermoplastic resin placed on a flat surface; .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17679189A JPH0342230A (en) | 1989-07-08 | 1989-07-08 | Method and apparatus for molding folding-back line part in thermoplastic resin sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17679189A JPH0342230A (en) | 1989-07-08 | 1989-07-08 | Method and apparatus for molding folding-back line part in thermoplastic resin sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0342230A true JPH0342230A (en) | 1991-02-22 |
Family
ID=16019912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17679189A Pending JPH0342230A (en) | 1989-07-08 | 1989-07-08 | Method and apparatus for molding folding-back line part in thermoplastic resin sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0342230A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5739523A (en) * | 1994-11-07 | 1998-04-14 | Nabco Limited | Object sensor system for doors |
-
1989
- 1989-07-08 JP JP17679189A patent/JPH0342230A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5739523A (en) * | 1994-11-07 | 1998-04-14 | Nabco Limited | Object sensor system for doors |
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