JPH0469231A - Preparation of outer decorative box made of synthetic resin - Google Patents
Preparation of outer decorative box made of synthetic resinInfo
- Publication number
- JPH0469231A JPH0469231A JP18509590A JP18509590A JPH0469231A JP H0469231 A JPH0469231 A JP H0469231A JP 18509590 A JP18509590 A JP 18509590A JP 18509590 A JP18509590 A JP 18509590A JP H0469231 A JPH0469231 A JP H0469231A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- line
- shape
- synthetic resin
- scribing
- 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
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 15
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 15
- 238000005452 bending Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000004080 punching Methods 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 abstract description 13
- 230000000052 comparative effect Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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）
この発明は治成樹脂製外装箱の製造方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of manufacturing an outer box made of cured resin.
（従来の技術及びその問題点）
従来、ビデオテープ等を収納するための合成樹脂製外装
箱は＝、ポリプロピレンシート１を、第１図に示すよう
な所定パターンに型抜すると共に、所定部分に折曲溝２
を形成すべく型押を施し、これを折曲して必要部分を超
音波溶着することにより製造されている。(Prior Art and its Problems) Conventionally, a synthetic resin outer box for storing video tapes, etc. is made by cutting a polypropylene sheet 1 into a predetermined pattern as shown in FIG. Bending groove 2
It is manufactured by stamping it to form a shape, bending it, and ultrasonically welding the necessary parts.
現在使用されている筋押刃３．４の形状を第２図（ａ）
（ロ）に示す。これらは、第３図（ａ） （ｂ）に示す
ように、その突出した先端部で折曲溝２が形成されるよ
うな形状を有するものである。Figure 2 (a) shows the shape of the 3.4 suction blade currently in use.
Shown in (b). As shown in FIGS. 3(a) and 3(b), these have a shape such that a bent groove 2 is formed at the protruding tip.
ところで上記筋押刃３．４を使用した場合、シー１１を
折曲する際に、折曲溝２での折曲性が充分ではなく、つ
まり折曲しにくく、折曲作業の自動化が困難であるのに
加え、手作業での折曲工程に大きな負担が掛かるという
不具合が生じている。By the way, when the above-mentioned crimp blade 3.4 is used, when bending the seam 11, the bendability in the bending groove 2 is not sufficient, that is, it is difficult to bend, and it is difficult to automate the bending work. In addition to this, there is also the problem that the manual bending process is a heavy burden.
このため筋押刃形状を改善し、折曲溝２の形状を変更し
て折曲性を向上することが考えられる。Therefore, it is conceivable to improve the shape of the pressing blade and change the shape of the bending groove 2 to improve the bendability.
そこで本発明者等は、第４図に示すような筋押刃５を使
用し、第５図に示すような折曲溝２を形成して検討を行
った。この結果、従来よりも折曲性は大幅に改善される
ものの、手作業での折曲工程での評価は充分なものでは
なかった。つまり折曲作業を行い易いか否かは、単に折
曲し易いか否かだけに係るのではなく、作業に影響を及
ぼす他の要素が存在するということであった。Therefore, the inventors of the present invention conducted a study by using a crimp blade 5 as shown in FIG. 4 and forming a bending groove 2 as shown in FIG. 5. As a result, the bendability is significantly improved compared to the conventional method, but the evaluation in the manual bending process was not satisfactory. In other words, whether or not the bending work is easy to perform does not simply depend on whether or not it is easy to bend, but there are other factors that affect the work.
そこでこの発明は、折曲作業に影響を及ぼす他の要素を
明らかにすると共に、折曲作業を行い易い折曲溝の形成
を可能にし、これにより折曲作業性の向上、及びその自
動化を可能にし得る合成樹脂製外装箱の製造方法を提供
することを目的としている。Therefore, this invention clarifies other factors that affect the bending work, and also makes it possible to form a bending groove that is easy to perform the bending work, thereby improving the workability of the bending work and making it possible to automate the bending work. The purpose of the present invention is to provide a method for manufacturing a synthetic resin outer box that can be used in various ways.
（問題点を解決するための手段）
この発明の合成樹脂製外装箱の製造方法は、合成樹脂シ
ートを所定パターンに型抜すると共に、所定部分に折曲
溝を形成するための筋押を施し、これを折曲して必要部
分を溶着して成る合成樹脂製外装箱の製造方法において
、上記型抜刃の内側に筋押刃を配置して型抜と筋押とを
略同時に行えるべく構成し、さらに上記筋押刃の断面形
状を、一対の前押コーナ部を備えると共に、両コーナ部
間がそれよりも外方へと突出しない形状にしたことを特
徴とする。(Means for Solving the Problems) The method for manufacturing a synthetic resin outer box of the present invention involves cutting out a synthetic resin sheet into a predetermined pattern, and applying creasing to form bending grooves in predetermined portions. In this method of manufacturing a synthetic resin outer box, which is formed by bending this and welding the necessary parts, a crimp blade is arranged inside the die cutting blade, and the mold cutting and creasing can be performed almost simultaneously. Further, the cross-sectional shape of the pressing blade is characterized in that it has a pair of forward pressing corner portions and that the space between the two corner portions does not protrude further outward.
（実施例）
まず厚さ１＋＋ｍのポリプロピレンシート１を用いて、
次の３種類の条件で第１図に示すような試片を作成した
。(Example) First, using a polypropylene sheet 1 with a thickness of 1++ m,
Test specimens as shown in FIG. 1 were prepared under the following three conditions.
北！Ｚｆｉ上・・・第２図（ａ）に示す略Ｖ形状の筋押
刃３を使用し、型抜と同時に筋押を行う。North! Zfi top: A substantially V-shaped crimp blade 3 shown in FIG. 2(a) is used to press the crimp simultaneously with die cutting.
１較■ｌ・・・第４図に示すような概略台形状の筋押刃
５を使用し、型抜後、別工程において筋押を行う。Comparison 1: Using a substantially trapezoidal pressing blade 5 as shown in FIG. 4, pressing is performed in a separate step after cutting the die.
１旌■・・・第４図に示すような概略台形状の筋押刃５
を使用し、型抜後と同時に筋押を行う。1 旌■...Approximately trapezoidal pressing blade 5 as shown in Fig. 4
, and press the muscle at the same time as after cutting the die.
そして上記において得られた３種類の試片について、手
作業による折曲工程において評価したところ、実施例の
評価が最も優れ、次いで比較例２が優れ、比較例１の評
価が最も低かった。When the three types of specimens obtained above were evaluated in the manual bending process, the evaluation of the example was the best, followed by Comparative Example 2, and the evaluation of Comparative Example 1 was the lowest.
上記事実を確認すると共に、その原因を明らかにするた
め、上記３種の試片から、さらに折曲溝２を含み、これ
とは直交する方向に延びる幅約２０閣の試片を取出し、
これにより次のような測定を行った。In order to confirm the above fact and clarify the cause, we took out a specimen with a width of about 20 squares, which included the bend groove 2 and extended in a direction perpendicular to this, from the three types of specimens mentioned above.
As a result, the following measurements were performed.
（１）折曲溝底部の肉厚
（２）折曲性・・・これは第６図に示すように、定盤Ａ
上に載置した試片を、９０度まで折曲するのに必要な力
をテンションゲージＢで測定した。(1) Thickness of the bottom of the bending groove (2) Bending property...This is determined by the surface plate A as shown in Figure 6.
The force required to bend the specimen placed on top to 90 degrees was measured using a tension gauge B.
（３）反発性・・・これは第７図に示すように、試片を
１８０°折曲し、その後これを放置し、１分後の復帰角
度を分度器Ｃでもって測定した。(3) Repulsion: As shown in FIG. 7, the specimen was bent 180°, then left to stand, and the return angle after 1 minute was measured using a protractor C.
（４）腰の強さ・・・これは第８図に示すように、試片
を１８０度折曲するのに必要な力をテンションゲージＢ
で測定した。(4) Hip strength: As shown in Figure 8, the force required to bend the specimen 180 degrees is measured by the tension gauge B.
It was measured with
上記測定結果を第１表に示す、なお各測定は３個の試片
について行い、表中にはその平均値を示している。The above measurement results are shown in Table 1. Each measurement was performed on three specimens, and the average value is shown in the table.
第１表
上記結果から、比較例１の折曲作業性が劣ることが裏付
けられる。The above results in Table 1 confirm that the bending workability of Comparative Example 1 is inferior.
ところで上記比較例２と実施例とは、同一の筋押刃５を
使用している訳であるが、前述の通り折曲工程における
評価に差異が生じた。この原因は、上記測定結果から、
腰の強さの差異によるものと推察される。つまり外装箱
の折曲工程においては、ある程度の角度（９０度）まで
は容易に折曲し得る特性が要求されるものの、扁平な状
ＩＩ！（１８０度）にまで容易に折曲可能であると、今
度は逆に折曲作業に不都合をきたすことになるものと推
察される。By the way, the Comparative Example 2 and the Example use the same crimp blade 5, but as described above, there was a difference in the evaluation in the bending process. The reason for this is based on the above measurement results.
It is assumed that this is due to the difference in the strength of the lower back. In other words, in the bending process of the outer box, it is required that it be easily bent up to a certain angle (90 degrees), but the flat shape II! (180 degrees), it is presumed that this would cause inconvenience in the bending work.
なお比較例２と実施例とは同一の筋押刃５を用いており
、その相違点は、筋押を型抜後に別工程で行うか、ある
いは型抜と同時に行うかという点であるが、この相違点
に起因して腰の強さに変化の生じる理由は明らかではな
いが、同時筋押の場合には、型抜刃によってその周囲が
固定された状態で筋押が行われることが原因になってい
るのではないかと想像される。Comparative Example 2 and Example use the same crimp blade 5, and the difference is whether the crimp is done in a separate process after die cutting, or whether it is done simultaneously with die cutting. It is not clear why the strength of the lower back changes due to this difference, but in the case of simultaneous muscle pressing, the reason is that muscle pressing is performed with the surrounding area fixed by the punching blade. It is imagined that it has become .
以上にこの発明の合成樹脂製外装箱の製造方法の実施例
の説明をしたが、この発明は上記実施例に限定されるも
のではなく、種々変更して実施可能である０例えば筋押
刃５の先端部は、第４図のように平面状のもの以外であ
っても、つまり一対の筋押コーナ部６．６間が凹入して
いる形状のものであっても上記同様の結果が得られるこ
とが明らかである。Although the embodiments of the method for manufacturing a synthetic resin outer box of the present invention have been described above, the present invention is not limited to the above embodiments, and can be implemented with various modifications. The same results as above can be obtained even if the tip of the holder is not planar as shown in Fig. 4, that is, it has a concave shape between the pair of recessed corner portions 6.6. It is clear that this can be achieved.
（発明の効果）
この発明の合成樹脂製外装箱の製造方法は上記のように
構成されたものであり、そのためこの発明によれば、箱
成形時の折曲作業性を向上したり、あるいは折曲作業を
自動化し得ることになる。しかも筋押と型抜とを同一工
程で行うことから、その作業能率も優れたものとなる。(Effects of the Invention) The method for manufacturing a synthetic resin outer box of the present invention is configured as described above, and therefore, according to the present invention, it is possible to improve the bending workability during box molding, or to improve the folding workability during box molding. This means that song work can be automated. Furthermore, since the pressing and die cutting are performed in the same process, the work efficiency is also excellent.
第１図はこの発明の合成樹脂製外装箱の製造方法に使用
する合成樹脂シートの一例の平面図、第２図（ａ）（ロ
）は従来の筋押刃の断面図、第３図（ａ）（ロ）は上記
筋押刃で得られる折曲溝を示す断面図、第４図はこの発
明において用いる筋押刃の一例の断面図、第５図は上記
筋押刃で得られる折曲溝を示す断面図、第６図は折曲性
の測定要領の説明図、第７図は反発性の測定要領の説明
図、第８図は腰の強さの測定要領の説明図である。
１・・・ポリプロピレンシート、２・・・折曲溝、５・
・・筋押刃、６・・・筋押コーナ部。
特許出願人 株式会社清和エレクトロニクス第１図Figure 1 is a plan view of an example of a synthetic resin sheet used in the method of manufacturing a synthetic resin outer box of the present invention, Figures 2 (a) and (b) are sectional views of a conventional crimp blade, and Figure 3 ( a) and (b) are cross-sectional views showing the bending grooves obtained with the above-described crimp blade, FIG. 4 is a cross-sectional view of an example of the crimp blade used in the present invention, and FIG. A cross-sectional view showing the curved groove, Fig. 6 is an explanatory diagram of the method for measuring bendability, Fig. 7 is an explanatory diagram of the method for measuring repulsion, and Fig. 8 is an explanatory diagram of the method for measuring waist strength. . 1...Polypropylene sheet, 2...Bending groove, 5...
...Stripe pusher blade, 6...Stripe pusher corner part. Patent applicant Seiwa Electronics Co., Ltd. Figure 1
Claims (1)
所定部分に折曲溝を形成するための筋押を施し、これを
折曲して必要部分を溶着して成る合成樹脂製外装箱の製
造方法において、上記型抜刃の内側に筋押刃を配置して
型抜と筋押とを略同時に行えるべく構成し、さらに上記
筋押刃の断面形状を、一対の筋押コーナ部を備えると共
に、両コーナ部間がそれよりも外方へと突出しない形状
にしたことを特徴とする合成樹脂製外装箱の製造方法。1. Cutting out a synthetic resin sheet into a predetermined pattern,
In a method for manufacturing a synthetic resin exterior box, in which a predetermined portion is pressed to form a bending groove, the box is bent and the necessary portions are welded, a crimp blade is placed inside the punching blade. The cross-sectional shape of the crimp blade is configured to include a pair of crimp corner portions, and the portion between the two corner portions protrudes further outward. A method for manufacturing a synthetic resin outer box, characterized in that the outer box is shaped like a plastic outer box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18509590A JPH0469231A (en) | 1990-07-11 | 1990-07-11 | Preparation of outer decorative box made of synthetic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18509590A JPH0469231A (en) | 1990-07-11 | 1990-07-11 | Preparation of outer decorative box made of synthetic resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0469231A true JPH0469231A (en) | 1992-03-04 |
Family
ID=16164759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18509590A Pending JPH0469231A (en) | 1990-07-11 | 1990-07-11 | Preparation of outer decorative box made of synthetic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0469231A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011246963A (en) * | 2010-05-26 | 2011-12-08 | Fusogosei Co Ltd | Covering material for stairs |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58163619A (en) * | 1982-03-25 | 1983-09-28 | Hajime Nagai | Working method of thermoplastic sheet material and blanking die used therefor |
-
1990
- 1990-07-11 JP JP18509590A patent/JPH0469231A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58163619A (en) * | 1982-03-25 | 1983-09-28 | Hajime Nagai | Working method of thermoplastic sheet material and blanking die used therefor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011246963A (en) * | 2010-05-26 | 2011-12-08 | Fusogosei Co Ltd | Covering material for stairs |
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