JPH044943B2 - - Google Patents
Info
- Publication number
- JPH044943B2 JPH044943B2 JP18281683A JP18281683A JPH044943B2 JP H044943 B2 JPH044943 B2 JP H044943B2 JP 18281683 A JP18281683 A JP 18281683A JP 18281683 A JP18281683 A JP 18281683A JP H044943 B2 JPH044943 B2 JP H044943B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- manufacturing
- resin
- window
- thickness
- 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 - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 17
- 229920003002 synthetic resin Polymers 0.000 claims description 12
- 239000000057 synthetic resin Substances 0.000 claims description 12
- 238000001746 injection moulding Methods 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 7
- 229920005992 thermoplastic resin Polymers 0.000 description 13
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 238000005520 cutting process Methods 0.000 description 8
- 238000000465 moulding Methods 0.000 description 5
- 238000004080 punching Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004049 embossing Methods 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 101001017827 Mus musculus Leucine-rich repeat flightless-interacting protein 1 Proteins 0.000 description 1
- -1 Polypropylene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 235000019241 carbon black Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、一面が開放口となつたほゞ直方体形
状のビデオカセツト収納ケースの製造方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a video cassette storage case having a substantially rectangular parallelepiped shape and having an open opening on one side.
かかる合成樹脂製容器の、容積の小さなものは
直接射出成型により立体成型が可能であるが、例
えばビデオテープレコーダー用のテープカセツト
の如き、ある一定の容積以上のものを収納するケ
ースの場合には、直接射出成型により立体成型を
行なうことは不可能なため展開板から製函する方
法がとられる。
Such synthetic resin containers with small volumes can be molded into three-dimensional shapes by direct injection molding, but in the case of cases that store items over a certain volume, such as tape cassettes for video tape recorders, Since it is impossible to perform three-dimensional molding by direct injection molding, a method is used in which a box is manufactured from a spread plate.
かかる合成樹脂製容器の展開板は従来、Ｔダイ
から長尺に押出成型された一定厚みの合成樹脂平
板を裁切断して一定の寸法の板としたあと、折り
目にあたる箇所（以下、「ケイ線部」と称する。）
を圧縮形付け又は切削加工し、切欠部を打ち抜き
加工し、更に場合によつては表面に型押し加工を
施して作成していた。このような従来の製造方法
は、工数が多く非能率的であり、不良品の発生率
も高く、切削代と切欠代を廃却するので、コスト
的・産業廃棄物発生面でも不都合を生じていた。 Conventionally, the development plate of such synthetic resin containers has been made by cutting a synthetic resin flat plate of a certain thickness extruded into a long length from a T-die to make a plate of a certain size, and then cutting the plate at the crease (hereinafter referred to as "K-line"). )
They were produced by compression shaping or cutting, punching out the notches, and in some cases embossing the surface. This conventional manufacturing method requires a large number of man-hours and is inefficient, has a high rate of defective products, and has disadvantages in terms of cost and industrial waste generation because cutting allowances and notch allowances are discarded. Ta.
又ケース内のビデオテープレコーダー用のテー
プカセツトの表示部分は意匠部分をケース詰めの
まま外から見えるようにケースの１部分を透明又
は半透明にすることが不可能であり、ケースの１
部分を打抜きその部分に透明な又は半透明な別シ
ートを貼りつけ加工するため非常に高価なものに
なつていた。 In addition, it is impossible to make one part of the case transparent or translucent so that the display part of a tape cassette for a video tape recorder inside the case can be seen from the outside while the design part is still packed in the case.
It was very expensive because the parts were punched out and a separate transparent or semi-transparent sheet was pasted onto the parts.
本発明は、上記の如き従来製造法の欠点をなく
し、切削加工・打抜き加工・型押し加工・透明シ
ート貼りつけ加工が不要で、材料と工数を減らし
能率的なかつコスト面、環境保全面でも不利のな
い合成樹脂製容器の製造方法を提供することを目
的とする。
The present invention eliminates the drawbacks of the conventional manufacturing method as described above, eliminates the need for cutting, punching, embossing, and pasting of transparent sheets, reduces materials and man-hours, and is efficient and disadvantageous in terms of cost and environmental protection. The purpose of the present invention is to provide a method for manufacturing a synthetic resin container that is free of.
本発明の上記の目的は、ケイ線部・切欠部及び
透明窓部を有する展開板を射出成型により作成
し、これを製函することを特徴とするビデオカセ
ツト収納ケースの製造方法により達成される。
The above-mentioned object of the present invention is achieved by a method for manufacturing a video cassette storage case, which is characterized in that a developing plate having a wired portion, a cutout portion, and a transparent window portion is created by injection molding, and then this is made into a box. .
以下、添付図面に従い本発明の内容を更に詳細
に説明する。 Hereinafter, the present invention will be explained in more detail with reference to the accompanying drawings.
本発明において、第１図の如き、一面が開放口
となつたほゞ直方体形状の合成樹脂製容器１は、
第２図に示す展開板２又は第３図に示す展開板
２′を製函することにより製造される。 In the present invention, a substantially rectangular parallelepiped-shaped synthetic resin container 1 with an open opening on one side as shown in FIG.
It is manufactured by box-forming the expansion plate 2 shown in FIG. 2 or the expansion plate 2' shown in FIG. 3.
第２図及び第３図において、展開板２又は展開
板２′は正面部４又は４′；背面部５又は５′；左
側面部６又は６′；右側面部７又は７′；底面部８
又は８′；左側面重ね合せ部９又は９′；右側面重
ね合せ部１０又は１０′；フラツプ１１，１１ａ
又は１１′，１１′ａ、ケイ線部１２又は１２′及
び窓部２０又は２０′，２１，２２からなり、こ
れらを製函することにより第１図に示す如き合成
樹脂製容器１が形成される。第１図においては、
第２図における展開板各部の対応がフラツプ１
１・１１ａ及びケイ線部１２を除き記入してあ
り、第３図における展開板各部の対応も、これに
準じたものとなる。 In FIGS. 2 and 3, the unfolding plate 2 or the unfolding plate 2' includes a front part 4 or 4'; a back part 5 or 5'; a left side part 6 or 6'; a right side part 7 or 7'; a bottom part 8.
or 8'; left side overlapping part 9 or 9'; right side overlapping part 10 or 10'; flaps 11, 11a
11', 11'a, a wire part 12 or 12', and a window part 20 or 20', 21, 22, and by forming these into a box, a synthetic resin container 1 as shown in FIG. 1 is formed. Ru. In Figure 1,
The correspondence of each part of the unfolding plate in Fig. 2 is flap 1.
1.1, 11a and the C line part 12 are filled in, and the correspondence of each part of the development plate in FIG. 3 is also in accordance with this.
従来、第１図に示す如き合成樹脂製容器１は、
ある一定の容積以上のものを収納するケースの場
合は、Ｔダイより長尺に押出成型された一定厚み
の合成樹脂平板を裁切断して、第２図又は第３図
で斜線部を施した切欠部及び窓部を切欠又は打抜
きしていない長方形の板としたあと、ケイ線部１
２又は１２′を加圧又は切削加工により形成し、
次いで斜線を施した切欠部１３，１４，１５，１
６又は１３′，１４′，１５′，１６′及び窓部２０
又は２０′，２１，２２を打抜き加工し更に窓部
２０又は２０′，２１，２２に透明又は半透明シ
ートを貼り場合によつては正面部４又は４′等に
型押し加工して展開板を作成し、これを製函して
いた。 Conventionally, a synthetic resin container 1 as shown in FIG.
In the case of a case that stores items over a certain volume, cut a synthetic resin flat plate of a certain thickness that has been extruded into a long length from a T-die and add the diagonal lines in Figures 2 or 3. After making the cutout and window into a rectangular plate without notches or punching,
2 or 12' by pressing or cutting,
Next, hatched notches 13, 14, 15, 1
6 or 13', 14', 15', 16' and window part 20
Or 20', 21, 22 are punched out and a transparent or semi-transparent sheet is pasted on the window part 20 or 20', 21, 22. Depending on the case, the front part 4 or 4' is embossed to form a development plate. was created and made into boxes.
本発明によれば、第２図又は第３図に示す如き
展開板２又は２′を、最初から切欠部を有する多
辺形の、かつケイ線部１２又は１２′、窓部２０
又は２０′，２１，２２、更に場合によつては正
面部等に凹凸を有する形で射出成型により作成
し、これを製函して第１図に示す如き合成樹脂製
容器１を作成する。 According to the present invention, the developing plate 2 or 2' as shown in FIG.
Alternatively, the containers 20', 21, 22, and in some cases, may be made by injection molding to have irregularities on the front surface, etc., and then made into a box to produce a synthetic resin container 1 as shown in FIG.
本発明方法において、射出成型する合成樹脂と
してはMFRが５〜50ｇ／10分、曲げ弾性率が
7000Kg／cm2以上であれば各種の熱可塑性樹脂が使
用可能であるが、特にポリオレフイン系熱可塑性
樹脂とポリスチレン系熱可塑性樹脂とABS系熱
可塑性樹脂がコスト、製作精度、寸度安定性の面
で適している。これら熱可塑性樹脂中には発泡剤
や白色顔料（酸化チタン・タルク・雲母・炭酸カ
ルシウム・クレー等）や各種のカーボンブラツク
又は各種の金属粉末（アルミニウム粉末・錫粉末
等）その他染料等各種の添加剤を添加することが
できる。 In the method of the present invention, the synthetic resin to be injection molded has an MFR of 5 to 50 g/10 minutes and a flexural modulus of
Various thermoplastic resins can be used as long as the weight is 7000Kg/cm 2 or more, but polyolefin thermoplastic resins, polystyrene thermoplastic resins, and ABS thermoplastic resins are particularly difficult to use in terms of cost, manufacturing accuracy, and dimensional stability. It is suitable for These thermoplastic resins contain various additives such as foaming agents, white pigments (titanium oxide, talc, mica, calcium carbonate, clay, etc.), various carbon blacks, various metal powders (aluminum powder, tin powder, etc.), and dyes. agents can be added.
本発明方法により、第１図に示す如き合成樹脂
製容器１を製造する場合、第２図・第３図に示す
如き展開板２又は２′を用い、断面形状を第４図
又は第５図に示す如き形状とするのが好ましい。
板厚ｔは0.5mm程度から数mm程度迄が一般で、ケ
イ線部は板厚ｔに対し５％以上薄くすることによ
り、製函が容易となる。 When manufacturing a synthetic resin container 1 as shown in FIG. 1 by the method of the present invention, a developing plate 2 or 2' as shown in FIGS. 2 and 3 is used, and the cross-sectional shape is as shown in FIG. It is preferable to have a shape as shown in FIG.
The plate thickness t is generally from about 0.5 mm to several mm, and by making the wire portion thinner by 5% or more with respect to the plate thickness t, it is easier to manufacture the box.
窓部の厚みは展開板の板厚ｔに対し、20％以上
薄くするか、又は展開板の板厚とほゞ同じ厚みで
表面を平滑にし、窓部以外の表面を型付け加工す
ることによつて窓部の透明度が得られる。 The thickness of the window part can be made 20% or more thinner than the thickness t of the expansion plate, or the surface can be smoothed to approximately the same thickness as the expansion plate, and the surfaces other than the window part can be molded. Transparency of the window can be obtained.
窓部のヘイズ度をＨとし、他の部分のヘイズ度
をH′とするとＨ≦50％とし、かつH′／Ｈ≧1.3と
することが望ましい。 Letting the haze degree of the window portion be H and the haze degree of the other portions be H', it is desirable that H≦50% and H'/H≧1.3.
窓部のヘイズ度を下げるには厚みを薄くする
か、樹脂のグレードをヘイズ度の低いものに選択
すると良い。他の部分のヘイズ度を上げるには厚
みを厚くするか、前述の如く、表面に型付け加工
を施して透明度を下げると良い。表面に施す型付
け加工は片面でも両面でも良い。 To reduce the haze level of the window, it is best to reduce the thickness or select a resin grade with a low haze level. To increase the degree of haze in other parts, it is better to increase the thickness, or to lower the transparency by applying a molding process to the surface as described above. The molding process applied to the surface may be done on one side or both sides.
製函前に正面部４又は４′；背面部５又は５′等
の外表面又は内表面にエンボス処理・溝づけ・文
字入れ凹部付けを施し、マーク入れ、絵入れする
ことにより外観や取扱い性を改善することも選択
的に行なわれる。又表面の１部に微細な型付け加
工を施すことにより、鉛筆、ボールペン、マジツ
ク等の筆記性付与が可能である。従来の製造法で
は、これら型押し加工により行つていたが、本発
明方法では、これらの表面加工も射出成型時に行
なえる。 Before manufacturing the box, the outer or inner surfaces of the front part 4 or 4' and the back part 5 or 5' are embossed, grooved, lettered and recessed, and marked and painted to improve the appearance and ease of handling. Improvements are also made selectively. Furthermore, by applying a fine patterning process to a portion of the surface, it is possible to provide writing properties with a pencil, ballpoint pen, magic marker, etc. In conventional manufacturing methods, these embossing processes were performed, but in the method of the present invention, these surface treatments can also be performed during injection molding.
又、本発明方法において射出成型を行なう場
合、溶融熱可塑性樹脂の注入口は、一箇所に限
らず、複数箇所設けることが可能である。こうす
ることにより、射出成型の際に樹脂の流れが良く
なり、ウエルドラインと称する樹脂の流れの合流
境界線の発生を防止することができる。注入口の
形状はバリ、注入しやすさの点から公知の種々の
形状が使える。これら注入口は第６図の左右又は
上下の中心線○イ−○ロ、○ハ−○ニの±２cm以内に１
ケ
所以上もうけるか、切欠部１３，１４，１５，１
６又は１３′，１４′，１５′，１６′の部分に設け
ると良い。注入口のバリ取り等の工程を必要とし
ないように底面部８又は８′、フラツプ１１，１
１ａ、又は１１′，１１′ａ、に設けると非常に良
い。 Furthermore, when injection molding is performed in the method of the present invention, the injection port for the molten thermoplastic resin is not limited to one location, but can be provided at multiple locations. By doing so, the flow of the resin improves during injection molding, and it is possible to prevent the occurrence of a boundary line where resin flows converge, which is called a weld line. As for the shape of the injection port, various known shapes can be used from the viewpoint of ease of injection. These injection ports should be placed within ±2 cm of the left and right or top and bottom center lines ○E-○Ro and ○Har-○D in Figure 6.
Make more than one cutout part 13, 14, 15, 1
It is preferable to provide it at portions 6, 13', 14', 15', and 16'. In order to eliminate the need for deburring the injection port,
It is very good to provide it at 1a, 11', 11'a.
更に又、熱可塑性樹脂中にジメチルポリシロキ
サン等のシリコン化合物を0.2〜５重量％添加す
ることにより成型時の流動性・成型性・離型性
や、ヒケ、ソリ、成形後のスベリ性を改良するこ
とができる。又、熱可塑性樹脂中に帯電防止剤を
添加することにより容器にゴミやほこりが付着し
にくくすること或は熱可塑性樹脂に発泡剤を添加
して容器の外観を変え手ざわりを良くしかつ軽量
化することも選択的に実施し得る。 Furthermore, by adding 0.2 to 5% by weight of silicone compounds such as dimethylpolysiloxane to the thermoplastic resin, fluidity, moldability, and mold release properties during molding, as well as sink marks, warpage, and slipperiness after molding are improved. can do. Additionally, by adding an antistatic agent to the thermoplastic resin, it is possible to make it difficult for dirt and dust to adhere to the container, or by adding a foaming agent to the thermoplastic resin, the appearance of the container can be changed to improve its feel and make it lighter. It may also be optionally possible to do so.
次に本発明の効果を一層明確にするため実施例
を以下に掲げる。
Next, in order to further clarify the effects of the present invention, examples are listed below.
(1) 第２図に示す如き展開板射出成型用金型を作
成した。展開板の寸法が以下の如くなるよう、
金型を設計した。注入口は第７図のようにフラ
ツプ１１の１ケ所とした。(1) A mold for injection molding of a developing plate as shown in Fig. 2 was prepared. So that the dimensions of the expansion plate are as follows:
Designed the mold. The injection port was located at one location on the flap 11 as shown in FIG.
展開板の縦・横寸法：
最長部が247mm×237mm
展開板の厚み：0.8mm
窓以外は表、裏両面に型付け加工、
ヘイズ度：60％
透明部分（窓）の寸法：縦70mm×90mm
厚み0.6mm平滑面、ヘイズ度：20％
ケイ線部の寸法：
巾1.5mm、深さ0.25mm
ケイ線部の断面形状：第４図に示すもの
切欠部１３，１４の寸法：
長さ約70mm、巾20mm
切欠部１５，１６の寸法：
最長部が37mm×28mmの多辺形
(2) この金型を用いて下記組成の溶融熱可塑性樹
脂を射出成型した：
三菱油化(株)製ポリプロピレン樹脂、グレード
NO・MG3C 99.95重量％
信越シリコーン(株)製ジメチルポリシロキサ
ン、
銘柄名KF−96 0.01重量％
酸化チタン 0.04重量％
ケイ線以外すべて0.8mm厚味とした場合の樹脂
の流れ予想図を第７図に示す。Vertical and horizontal dimensions of the unfolding plate: The longest part is 247mm x 237mm Thickness of the unfolding plate: 0.8mm Embossed on both the front and back sides except for the window Haze level: 60% Dimensions of the transparent part (window): Height 70mm x 90mm Thickness 0.6 mm smooth surface, Haze degree: 20% Dimensions of the wire part: Width 1.5 mm, depth 0.25 mm Cross-sectional shape of the wire part: As shown in Figure 4 Dimensions of notches 13 and 14: Length approximately 70 mm, Width: 20 mm Dimensions of notches 15 and 16: Polygon with the longest part being 37 mm x 28 mm (2) This mold was used to injection mold a molten thermoplastic resin with the following composition: Polypropylene resin manufactured by Mitsubishi Yuka Co., Ltd. , Grade No. MG3C 99.95% by weight Dimethylpolysiloxane manufactured by Shin-Etsu Silicone Co., Ltd. Brand name KF-96 0.01% by weight Titanium oxide 0.04% by weight The expected flow diagram of the resin when all except the silicone wires are 0.8mm thick is shown below. It is shown in Figure 7.
(3) 射出成形した展開板２を組み立てて重なり合
つた部分を超音波接合機で溶接し概略寸法が
192mm×105mm×28mmのビデオテープカセツト用
ケースを製函した。(3) Assemble the injection molded expansion plate 2 and weld the overlapping parts using an ultrasonic welding machine to determine the approximate dimensions.
A case for a videotape cassette measuring 192mm x 105mm x 28mm was manufactured.
製函数量が、30万個のときの、使用樹脂量減
少、透明窓シートが不用になる上従来の裁切
断・打抜き、透明窓貼りつけ、ケイ線型付け、
筆記性付与塗布、文字入れ、マーク、絵入れ工
程等を有する製造法に比較し、製造コストは35
％に削減され、不良品の発生率は従来法の11％
に比し、本発明方法では１％であつた。 When the number of boxes manufactured was 300,000, the amount of resin used was reduced, transparent window sheets were no longer required, and conventional cutting and punching, pasting of transparent windows, die-cutting,
The manufacturing cost is 35% compared to a manufacturing method that includes processes such as coating for writing, adding letters, markings, and painting.
%, and the incidence of defective products is 11% compared to the conventional method.
Compared to this, it was 1% in the method of the present invention.
本発明方法によれば上記の如く材料と工数が低
減するので製造コストが下がり、工程が安定化す
る他、透明窓があるのでケースをしたままカセツ
ト表示が見え外観・精度・仕上げ面等の品質向
上、作業の自動化、産業廃棄物の削減等格段の効
果を得ることができる。樹脂注入口は第８図のよ
うに左右又は上下の中心線○イ−○ロ又は○ハ−○ニの
±
２cm以内又は切欠部に限定されることはないが樹
脂の流れは悪くなる。
According to the method of the present invention, as mentioned above, the materials and man-hours are reduced, which reduces manufacturing costs and stabilizes the process.In addition, since there is a transparent window, the cassette display can be seen even when the case is in place, and the quality of appearance, precision, finish, etc. It is possible to obtain significant effects such as improvement, automation of work, and reduction of industrial waste. As shown in Figure 8, the resin injection port is located at the center line of the left and right or top and bottom.
Although it is not limited to within 2 cm or in the notch, the flow of the resin will be poor.
本発明は実施例に限らず、例えば下記に示す如
く広範囲な応用が可能である。 The present invention is not limited to the embodiments, and can be widely applied, for example, as shown below.
(1) 展開板の形状は左右対称形でなく、例えば正
面部の形状と背面部の形状は異なつたものとし
て良い。(1) The shape of the expansion plate is not bilaterally symmetrical; for example, the shape of the front part and the shape of the back part may be different.
(2) 側面部の厚みは、ケイ線部の残厚と同じにし
ても、重ね合せ接合により強度が保てる。(2) Even if the thickness of the side part is the same as the remaining thickness of the wire part, the strength can be maintained by overlapping joints.
(3) 切欠部の形状は長方形・正方形・台形・半円
形・半楕円形・正三角形・二等辺三角形・矢形
等種々の形とし得る。(3) The shape of the notch can be various shapes such as rectangle, square, trapezoid, semicircle, semiellipse, equilateral triangle, isosceles triangle, and arrow shape.
(4) ケイ線部の残厚は、一部を厚くして射出成型
時の樹脂の流れを良化を図ることがある。(4) The remaining thickness of the wire part may be partially thickened to improve the flow of resin during injection molding.
(5) 金型の内面に加工を施し、ケースの内・外面
が絹目・砂目・縄目・縦筋・横筋・格子目・微
粒面布目等を有するものにすることができる。(5) The inner surface of the mold can be processed so that the inner and outer surfaces of the case have silky grains, sandy grains, rope grains, vertical stripes, horizontal stripes, lattice grains, fine-grain surface textures, etc.
(6) 射出成型に際し、熱可塑性樹脂は共重合体
や、２種以上の熱可塑性樹脂の混合樹脂とする
ことができる。(6) For injection molding, the thermoplastic resin can be a copolymer or a mixed resin of two or more thermoplastic resins.
(7) 熱可塑性樹脂は、着色顔料又は着色染料を１
種又は多種加えることができる。(7) Thermoplastic resins contain 1 color pigment or color dye.
A species or multiple species can be added.
(8) 展開板を射出成型した後に、印刷工程やラベ
ル貼り工程を製函工程の前後に選択的に加え、
マークや文字を付することができる。(8) After the development plate is injection molded, printing and labeling processes are selectively added before and after the box manufacturing process.
Marks and characters can be attached.
第１図は本発明により製造されるビデオカセツ
ト収納ケースの外観図、第２図及び第３図は展開
板の実施例平面図、第４図及び第５図は第２図に
おけるＡ−Ｂ面又は第３図におけるA′−B′面で
の展開板断面図である。第６図、第７図及び第８
図は展開板に対し注入口の位置関係と樹脂流れの
状況を示す図である。
１…ビデオカセツト収納ケース、２，２′…展
開板、１２，１２′…ケイ線部、１３，１４，１
５，１６，１３′，１４′，１５′，１６′…切欠
部、２０，２０′，２１，２２…透明窓部。
Fig. 1 is an external view of a video cassette storage case manufactured according to the present invention, Figs. 2 and 3 are plan views of an embodiment of the unfolding plate, and Figs. 4 and 5 are planes A-B in Fig. 2. Or, it is a sectional view of the development plate taken along the plane A'-B' in FIG. 3. Figures 6, 7 and 8
The figure shows the positional relationship of the injection port with respect to the development plate and the state of resin flow. 1... Video cassette storage case, 2, 2'... Expansion plate, 12, 12'... Key line section, 13, 14, 1
5, 16, 13', 14', 15', 16'...notch part, 20, 20', 21, 22...transparent window part.
Claims (1)
ケイ線部、切欠部、及び透明窓部を有する展開板
を射出成型により作成し、これを製函することを
特徴とするビデオカセツト収納ケースの製造方
法。 ２ 該透明窓部のヘイズ度は50％以下であること
を特徴とする特許請求の範囲第１項記載のビデオ
カセツト収納ケースの製造方法。 ３ 該展開板を外表面の１部に筆記性付与加工す
ることを特徴とする特許請求の範囲第１項又は第
２項記載のビデオカセツト収納ケースの製造方
法。[Claims] 1. Using a synthetic resin with an MFR of 5 to 50 g/10 minutes,
1. A method for manufacturing a video cassette storage case, characterized in that a developing plate having a wired part, a cutout part, and a transparent window part is created by injection molding, and then this is made into a box. 2. The method of manufacturing a video cassette storage case according to claim 1, wherein the haze degree of the transparent window portion is 50% or less. 3. A method of manufacturing a video cassette storage case as set forth in claim 1 or 2, characterized in that a part of the outer surface of the expansion plate is processed to impart writability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58182816A JPS6073837A (en) | 1983-09-30 | 1983-09-30 | Manufacture of synthetic resin container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58182816A JPS6073837A (en) | 1983-09-30 | 1983-09-30 | Manufacture of synthetic resin container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6073837A JPS6073837A (en) | 1985-04-26 |
| JPH044943B2 true JPH044943B2 (en) | 1992-01-29 |
Family
ID=16124943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58182816A Granted JPS6073837A (en) | 1983-09-30 | 1983-09-30 | Manufacture of synthetic resin container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6073837A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4693317B2 (en) * | 2001-09-28 | 2011-06-01 | 日本写真印刷株式会社 | Convex / concave transfer sheet, concave / convex sheet having transparent window portion, method for producing the same, and method for producing decorative molded product having concave / convex surface |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4385Y1 (en) * | 1965-04-09 | 1968-01-05 | ||
| JPS4925488U (en) * | 1972-06-01 | 1974-03-04 | ||
| JPS54122377A (en) * | 1978-03-15 | 1979-09-21 | Koito Mfg Co Ltd | Resin molding with hinge |
| JPS58916B2 (en) * | 1980-06-04 | 1983-01-08 | 株式会社 日東電機製作所 | vibrating rotary sieve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58916U (en) * | 1981-06-24 | 1983-01-06 | 大日本印刷株式会社 | Blank board for videotape cassette sack packaging |
-
1983
- 1983-09-30 JP JP58182816A patent/JPS6073837A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4385Y1 (en) * | 1965-04-09 | 1968-01-05 | ||
| JPS4925488U (en) * | 1972-06-01 | 1974-03-04 | ||
| JPS54122377A (en) * | 1978-03-15 | 1979-09-21 | Koito Mfg Co Ltd | Resin molding with hinge |
| JPS58916B2 (en) * | 1980-06-04 | 1983-01-08 | 株式会社 日東電機製作所 | vibrating rotary sieve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6073837A (en) | 1985-04-26 |
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