JPS634775B2 - - Google Patents
Info
- Publication number
- JPS634775B2 JPS634775B2 JP58027250A JP2725083A JPS634775B2 JP S634775 B2 JPS634775 B2 JP S634775B2 JP 58027250 A JP58027250 A JP 58027250A JP 2725083 A JP2725083 A JP 2725083A JP S634775 B2 JPS634775 B2 JP S634775B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- container
- mold
- present
- slipping
- 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.)
- Expired
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Description
【発明の詳細な説明】 本発明は容器の製造方法に関する。[Detailed description of the invention] The present invention relates to a method for manufacturing a container.
従来より合成樹脂製容器が用いられており、特
に食品容器としての需要が増大している。この合
成樹脂製容器は例えばシートから金型を用いて真
空成型、圧空成型等により製造されているが、金
型とシートが滑つてしまつたり、肉厚が不均一に
なる欠点があり、特にシートに印刷が施こされて
いる場合には滑りによつて印刷面の位置ずれが生
ずる不具合を生じていた。 Containers made of synthetic resin have been used for a long time, and the demand for them, especially as food containers, is increasing. This synthetic resin container is manufactured, for example, by vacuum forming or pressure forming using a mold from a sheet, but there are drawbacks such as slipping between the mold and sheet and uneven wall thickness. When a sheet is printed, there has been a problem in that the printed surface is misaligned due to slipping.
本発明は上記従来技術の欠点を解消した容器の
製造方法を提供することを目的とする。 An object of the present invention is to provide a method for manufacturing a container that eliminates the drawbacks of the prior art described above.
すなわち、本発明は熱可塑性樹脂シートを加熱
して軟化し、次いで容器の外形形状を有する雌型
と、容器の底部に相当する位置にシートの滑りを
防止するための凹凸を設けてなる雄型とでシート
をプレスして成形することを特徴とする容器の製
造方法を要旨とするものである。 That is, the present invention heats a thermoplastic resin sheet to soften it, and then creates a female mold having the external shape of a container, and a male mold, which is formed by providing unevenness at a position corresponding to the bottom of the container to prevent the sheet from slipping. The gist of this invention is a method of manufacturing a container, which is characterized by pressing and molding a sheet using a method of manufacturing a container.
以下、本発明の実施例を図面に基き説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図には本発明の製造方法の一例が略図的に
示されている。この方法では熱可塑性樹脂シート
１を適宜の加熱手段で加熱、軟化させた後金型２
により成型する。熱可塑性樹脂シート１として
は、例えばポリスチレン、耐衝撃性ポリスチレ
ン、ポリプロピレン、ポリエチレンテレフタレー
ト等のシートが用いられ、これらは発泡、無発泡
いずれでもよい。また印刷面を有するシート１を
用いることができるが、この場合特に印刷面のず
れを防止できるので有効である。成型は真空成
型、圧空成型等通常の方法により行なうことがで
きる。本発明に用いられる上記金型２は雄型３お
よび雌型４よりなり、１個または複数個の容器５
を成型できるものであるが、通常は複数個同時に
成型する。雄型３には容器５の底部６に相当し、
成形時にシート１と最初に当接する位置に滑り防
止のための凹凸部７が形成されている。この凹凸
部７の形状は第２図に示す如く渦巻状、同心円
状、放射状、網目状、直線状等任意であるが、シ
ート１の送り方向と角度をもつて形成することに
より金型２とシート１との滑りをより一層防止で
きるので好ましい。また上記凹凸部７の高さ（深
さ）は成型される容器５の肉厚によつても異なる
が通常0.3〜1.5mm、好ましくは0.3〜1.0mmであり、
これにより得られる容器５の凹凸部８は0.1〜1.2
mm、好ましくは0.2〜0.5mmの寸法を有する。 FIG. 1 schematically shows an example of the manufacturing method of the present invention. In this method, a thermoplastic resin sheet 1 is heated and softened using an appropriate heating means, and then a mold 2 is heated.
Molded by. As the thermoplastic resin sheet 1, for example, a sheet of polystyrene, impact-resistant polystyrene, polypropylene, polyethylene terephthalate, etc. is used, and these may be foamed or non-foamed. It is also possible to use the sheet 1 having a printed surface, which is particularly effective since it can prevent the printed surface from shifting. The molding can be carried out by a conventional method such as vacuum molding or pressure molding. The mold 2 used in the present invention consists of a male mold 3 and a female mold 4, and one or more containers 5.
Although it is possible to mold several pieces, usually multiple pieces are molded at the same time. The male mold 3 corresponds to the bottom 6 of the container 5,
A concavo-convex portion 7 for preventing slipping is formed at a position where the sheet 1 first comes into contact with the sheet 1 during molding. As shown in FIG. 2, the shape of the uneven portion 7 can be arbitrary, such as spiral, concentric, radial, mesh, or linear, but by forming it at an angle to the feeding direction of the sheet 1, This is preferable because it can further prevent slipping with the sheet 1. Further, the height (depth) of the uneven portion 7 varies depending on the wall thickness of the container 5 to be molded, but is usually 0.3 to 1.5 mm, preferably 0.3 to 1.0 mm.
The unevenness 8 of the container 5 obtained by this is 0.1 to 1.2
mm, preferably 0.2-0.5 mm.
上記凹凸部７により金型２とシート１との滑り
を防止でき、また容器５の底部６の肉厚の減少を
防止できる。 The uneven portion 7 can prevent the mold 2 and the sheet 1 from slipping, and can also prevent the thickness of the bottom 6 of the container 5 from decreasing.
尚、上記実施例では雄型３に凹凸部７を形成し
た場合を例示したが同時に雌型４にも雄型３の凹
凸部７に一致する凹凸部を形成してもよい。 Incidentally, in the above embodiment, the case where the uneven portion 7 is formed on the male die 3 is illustrated, but at the same time, an uneven portion matching the uneven portion 7 of the male die 3 may be formed on the female die 4 as well.
本発明により得られる容器５は第３図に示す如
き丼状のほか、皿状、角形状等種々の形状を採る
ことができ、例えば食品容器として有効に用いる
ことができる。 The container 5 obtained according to the present invention can have various shapes such as a bowl shape as shown in FIG. 3, a plate shape, and a square shape, and can be effectively used as a food container, for example.
以上説明したように本発明の製造方法によれ
ば、金型の少なくとも雄型に滑り防止のための凹
凸部が形成されていることによりシートと金型の
滑りを防止できると共に底部の肉厚の減少を防止
でき、特に印刷面を有するシートの場合に印刷面
がずれることがないので有効である等の利点を有
するものである。 As explained above, according to the manufacturing method of the present invention, at least the male part of the mold is formed with a concavo-convex portion to prevent slipping, so that slippage between the sheet and the mold can be prevented, and the thickness of the bottom part can be reduced. This has advantages such as being able to prevent the printing surface from being reduced, and being particularly effective in the case of a sheet having a printed surface, since the printed surface will not shift.
図面は本発明の実施例を示すもので、第１図は
本発明の製造方法の一例を示す略図、第２図は雄
型を示す破断平面図、第３図は本発明により得ら
れる容器を示す縦断面図である。
１……熱可塑性樹脂シート、２……金型、３…
…雄型、４……雌型、５……容器、６……底部、
７……凹凸部。
The drawings show embodiments of the present invention; FIG. 1 is a schematic diagram showing an example of the manufacturing method of the present invention, FIG. 2 is a cutaway plan view showing a male mold, and FIG. 3 is a diagram showing a container obtained by the present invention. FIG. 1...Thermoplastic resin sheet, 2...Mold, 3...
...Male type, 4...Female type, 5...Container, 6...Bottom,
7...Uneven portion.
Claims (1)
で容器の外形形状を有する雌型と、容器の底部に
相当する位置にシートの滑りを防止するための凹
凸を設けてなる雄型とでシートをプレスして成形
することを特徴とする容器の製造方法。1 Heat the thermoplastic resin sheet to soften it, and then mold the sheet with a female mold having the external shape of a container and a male mold having unevenness at a position corresponding to the bottom of the container to prevent the sheet from slipping. A method for manufacturing a container characterized by pressing and molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58027250A JPS59152815A (en) | 1983-02-21 | 1983-02-21 | Manufacture of container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58027250A JPS59152815A (en) | 1983-02-21 | 1983-02-21 | Manufacture of container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59152815A JPS59152815A (en) | 1984-08-31 |
| JPS634775B2 true JPS634775B2 (en) | 1988-01-30 |
Family
ID=12215825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58027250A Granted JPS59152815A (en) | 1983-02-21 | 1983-02-21 | Manufacture of container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59152815A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60143925A (en) * | 1983-12-29 | 1985-07-30 | Sekisui Plastics Co Ltd | Process for molding vessel with formed sheet and it mold |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847231B2 (en) * | 1977-06-06 | 1983-10-21 | 日立造船株式会社 | Coating method for inorganic zinc-based paint in the production of large structures |
-
1983
- 1983-02-21 JP JP58027250A patent/JPS59152815A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59152815A (en) | 1984-08-31 |
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