JPH0554197B2 - - Google Patents
Info
- Publication number
- JPH0554197B2 JPH0554197B2 JP1235097A JP23509789A JPH0554197B2 JP H0554197 B2 JPH0554197 B2 JP H0554197B2 JP 1235097 A JP1235097 A JP 1235097A JP 23509789 A JP23509789 A JP 23509789A JP H0554197 B2 JPH0554197 B2 JP H0554197B2
- Authority
- JP
- Japan
- Prior art keywords
- main wall
- mold
- molding
- case
- wall
- 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
- 238000000465 moulding Methods 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 3
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 claims 1
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000005336 cracking Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ビデオ用やオーデイオ用の各種テー
プカートリツジにおいて、ケース本体が上下ケー
スからなる上下分割式のカートリツジ用ケースを
プラスチツクの射出成形によつて製造する方法に
関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a case for a tape cartridge for video and audio, in which the case body is divided into an upper and lower case, by injection molding of plastic. The present invention relates to a method of manufacturing the same.
例えば、第２図に示す如きビデオ用テープカー
トリツジにおいては、上下ケース１Ａ・１Ｂを蓋
合わせ状にねじ等で結合してなるケース本体１の
内部左右に、テープＴが巻かれるテープリール
２・２を内装し、ケース本体１にこれの前面を蓋
するテープ保護用の前蓋３を開閉操作可能に枢支
し、テープＴが一方のリール２からケース前面に
導出されて他方のリール２に巻取られ、テープカ
ートリツジの不使用時にはケース前面に導出した
テープＴを閉じ姿勢にある前蓋３で保護し、テー
プカートリツジをビデオデツキに装填したときに
は前蓋３が上向きに開いてテープＴがケース前方
に引出し可能なスタンバイ状態になる。
For example, in a video tape cartridge as shown in FIG. 2, a tape reel 2 and a tape T are wound around the inside left and right sides of a case body 1, which is formed by connecting upper and lower cases 1A and 1B with screws or the like in a lid-like manner. 2 is installed inside the case body 1, and a front cover 3 for protecting the tape that covers the front side of the case body 1 is pivotally supported so that it can be opened and closed, and the tape T is led out from one reel 2 to the front of the case and transferred to the other reel 2. When the tape cartridge is wound and is not in use, the tape T led out to the front of the case is protected by the front lid 3 in the closed position, and when the tape cartridge is loaded into the video deck, the front lid 3 opens upward and the tape T is removed. The case goes into standby state where it can be pulled out to the front.
そのケース本体１を構成する半割りの上下ケー
ス１Ａ・１Ｂはプラスチツク成形品であり、その
形状は第３図に示すようになつている。 The upper and lower cases 1A and 1B, which are divided into halves and make up the case body 1, are molded plastic products, and have the shape shown in FIG. 3.
まず上ケース１Ａは、各テープリール２に対す
るテープ巻量視認用の透明窓４を左右に有する扁
平で角形の主壁５（ケース本体１の上壁）の外周
縁に、外面がテープ走行面になる前壁６、それに
後壁７および左右側壁８が立認され、これらの周
壁の内方側に部分円弧状のテープリール遊動規制
用の立壁９やテープ端検出用ランプが挿入される
円筒状立壁１０がそれぞれ主壁５の内面から立設
され、またテープガイド部材を挿嵌支持するとと
もにねじ止めも兼ねた支軸１１や、上下ケースね
じ止め用のボス１２などが同じく主壁５の内面か
ら立設された形状になつている。 First, the upper case 1A has a flat, square main wall 5 (upper wall of the case body 1) having transparent windows 4 on the left and right sides for visually checking the tape winding amount for each tape reel 2. A front wall 6, a rear wall 7, and left and right side walls 8 are vertically recognized, and a partially arc-shaped vertical wall 9 for tape reel movement restriction and a tape end detection lamp are inserted into the inner side of these peripheral walls. Vertical walls 10 are erected from the inner surface of the main wall 5, and support shafts 11 for inserting and supporting the tape guide member and also serving as screw fasteners, bosses 12 for screw fastening the upper and lower cases, etc. are also provided from the inner surface of the main wall 5. It has an upright shape.
下ケース１Ｂは、左右に駆動軸挿入孔１３を有
する扁開で角形の主壁５（ケース本体の底壁）
に、便宜上同一符号で示すように、上ケース１Ａ
の各種立壁群およびその他の立設物に対応して突
き合わされる立設物が設けられている。 The lower case 1B has a flat, rectangular main wall 5 (bottom wall of the case body) having drive shaft insertion holes 13 on the left and right sides.
As indicated by the same reference numerals for convenience, the upper case 1A
Standing objects are provided that correspond to the various groups of standing walls and other standing objects.
かかる形状の上下ケース１Ａ，１Ｂの射出成形
に際しては、後述するところの第７図および第８
図に基づいて説明すると、主壁５の内面および各
種立壁群を成形するための第１金型１６（これは
深い成形用空間を有する）と、主壁５の外面を成
形する第２金型１７とを用い、第１金型１６側に
成形品を抜出すためのノツクピンが設けられる。 When injection molding the upper and lower cases 1A, 1B having such a shape, please refer to FIGS. 7 and 8, which will be described later.
To explain based on the figure, a first mold 16 (which has a deep molding space) is used to mold the inner surface of the main wall 5 and various vertical wall groups, and a second mold 16 is used to mold the outer surface of the main wall 5. 17, and a knock pin for extracting the molded product is provided on the first mold 16 side.
しかるに、従来のノツクピンは第７図および第
８図において符号１４で示すものであつて、ノツ
クピンの先端面が主壁５の内面にのみ接当作用す
る形態を採つていた。
However, the conventional knock pin is indicated by the reference numeral 14 in FIGS. 7 and 8, and has a configuration in which the tip end surface of the knock pin comes into contact only with the inner surface of the main wall 5.
そのため、かかるノツクピンによつて成形品を
押出す際に、立壁群に離型性の悪い部分があると
主壁５の該当部分に割れが生じがちであつた。 Therefore, when extruding a molded product using such a dowel pin, if there is a part of the vertical wall group with poor mold releasability, cracks tend to occur in the corresponding part of the main wall 5.
とくに、この種のカートリツジケースでは前面
側に立壁が集中し、かつ高い制度が要求されるの
で、射出成形時の素材注入ゲートが前面側に設け
られる傾向にあるが、このゲート付近は当然のこ
とながら射出圧力が他の部分よりも高くて金型内
面に対する接着度も強くなるので離型性が悪い。
こういつた離型性の悪いところには、それに合わ
せてノツクピンを数多く配置することになるが、
それでもなおケースに部分的な割れが生じること
を皆無にできないのが現状である。 In particular, in this type of cartridge case, the standing walls are concentrated on the front side and high accuracy is required, so there is a tendency for the material injection gate during injection molding to be installed on the front side. However, the injection pressure is higher than other parts, and the degree of adhesion to the inner surface of the mold is also stronger, resulting in poor mold releasability.
In areas where mold release is poor, a large number of dowel pins are placed accordingly.
Even so, the current situation is that it is not possible to completely eliminate the occurrence of partial cracks in the case.
そこで本発明の目的は、段付きノツクピンを用
いて、このような成形品の抜出し分離時における
ケースの割れを確実に防止できるテープカートリ
ツジ用ケースの製造方法を提供するにある。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for manufacturing a case for a tape cartridge, which uses stepped dowel pins to reliably prevent cracking of the case during extraction and separation of such molded products.
本発明は、扁平な主壁５の内面から前壁６を含
む立壁群が一体連設された上下分割式のテープカ
ートリツジ用ケースを製造するに際して、
主壁５の内面および立壁群を成形する第１金型
１６と、主壁５の外面を成形する第２金型１７
と、第１金型１６側に装備される成形品抜出し用
のノツクピン１４，１５群とを備えており、
これらノツクピン１４，１５のうちの選ばれた
ノツクピン１５は、第１図に示すごとく先端側の
外周部分に段１８が形成されていて、該段１８よ
りも先端側の外側面１９が上記前壁６から主壁５
にわたつて内向きに連設される捨てリブ２０の側
面の一部に対する成形面になるとともに、該段１
８が該捨てリブ２０の突端面に対する成形面にな
るものとし、
両金型１６，１７の成形空間に、第７図に示す
ごとくプラスチツク素材を射出して冷却固化させ
たのち両金型１６，１７を分離し、
次にノツクピン１４，１５群を突出作動させて
成形品第１金型１６から抜出すときに、第８図に
示すごとく段付きノツクピン１５の先端面で主壁
５の内面を押圧すると同時に、前記段１８で捨て
リブ２０の突端面を押圧するようにしたことを要
件とするものである。
The present invention involves molding the inner surface of the main wall 5 and the group of vertical walls when manufacturing a vertically split case for a tape cartridge in which a group of vertical walls including a front wall 6 are integrally connected from the internal surface of the flat main wall 5. A first mold 16 and a second mold 17 for molding the outer surface of the main wall 5
and a group of knock pins 14 and 15 for ejecting the molded product provided on the side of the first mold 16, and a selected one of the knock pins 14 and 15 has a tip end as shown in FIG. A step 18 is formed on the outer peripheral portion of the side, and an outer surface 19 on the tip side of the step 18 extends from the front wall 6 to the main wall 5.
It serves as a molding surface for a part of the side surface of the sacrificial rib 20 that is continuous inward across the stage 1.
8 shall be the molding surface for the tip end surface of the sacrificial rib 20, and after injecting the plastic material into the molding spaces of both molds 16 and 17 as shown in FIG. 7 and cooling and solidifying it, both molds 16 and 17 17, and then operate the groups of dowel pins 14 and 15 to project and pull out the molded product from the first mold 16. As shown in FIG. A requirement is that the step 18 presses the tip end surface of the sacrificial rib 20 at the same time as pressing.
かかる本発明方法によれば、前壁６から主壁５
にわたつて内向きに連設される捨てリブ２０を別
に設け、段付きノツクピン１５が捨てリブ２０の
突端面を押圧するのみならず、段１８より先端側
の外側面１９で捨てリブ２０の一側面を支持し、
かつピン先端面で主壁５の内面を支持したままで
該主壁内面を同時に押圧するようにしたので、深
い成形空間から問題の前壁６を抜出す際の割れ防
止に極めて有効である。
According to the method of the present invention, from the front wall 6 to the main wall 5
Separately, a sacrificial rib 20 is provided that extends inwardly over the entire length, and the stepped knock pin 15 not only presses the tip end surface of the sacrificial rib 20, but also presses one of the sacrificial ribs 20 with the outer surface 19 on the tip side of the step 18. support the sides,
In addition, since the inner surface of the main wall 5 is simultaneously pressed while the inner surface of the main wall 5 is supported by the tip end surface of the pin, it is extremely effective in preventing cracking when the front wall 6 is extracted from a deep molding space.
しかも、捨てリブ２０はテープカートリツジに
おいて文字通り格別の機能を有するものではない
から、段付きノツクピン１５による押圧作用を受
けて該リブ２０の突端面などに押圧痕や変形が生
じても機能上問題がなく、外側面がテープ走行案
内面となる前壁６を保護するうえでも有利であ
る。 Furthermore, since the sacrificial rib 20 literally has no special function in the tape cartridge, there is a functional problem even if pressure marks or deformation occur on the tip end surface of the rib 20 due to the pressing action of the stepped knock pin 15. This is advantageous in protecting the front wall 6 whose outer surface serves as a tape running guide surface.
以下、その詳細を前述のビデオ用テープカート
リツジのケース１Ａ，１Ｂを射出成形する場合を
例にとつて説明する。
The details will be explained below by taking as an example the case where the cases 1A and 1B of the video tape cartridge described above are injection molded.
第４図は上ケース１Ａの内面を、第５図は下ケ
ース１Ｂの内面をそれぞれ上方から見た平面図で
あつて、その基本形態は既に述べた通りである。
但し、図中の符号Ｇは素材注入ゲートであり、図
では前壁６に設けられている。１４，１５はノツ
クピンを示す。 FIG. 4 is a plan view of the inner surface of the upper case 1A, and FIG. 5 is a plan view of the inner surface of the lower case 1B, viewed from above, and the basic form thereof is as already described.
However, the reference numeral G in the figure is a material injection gate, which is provided on the front wall 6 in the figure. 14 and 15 indicate knock pins.
第７図は第５図中のＡ−Ａ線での成形状態を示
しており、下ケース１Ｂの主壁５の内面および立
壁群（図では前壁６および左側壁８それにテープ
リール遊動規制用立壁９とを示した）の全体を成
形する第１金型１６と、該主壁５の外面を成形す
る第２金型１７とが使用され、第１金型１６の前
壁６の成形部に対応して素材注入ゲートＧが配設
され、第１金型１６側に丸軸状のノツクピン１
４，１５群が出退自在に多数配備されている。 FIG. 7 shows the molding state taken along line A-A in FIG. A first mold 16 for molding the entire vertical wall 9) and a second mold 17 for molding the outer surface of the main wall 5 are used. A material injection gate G is arranged corresponding to
Groups 4 and 15 are deployed in large numbers and can be moved in and out.
ここで注目すべきは、符号１４で示すノツクピ
ン（第７図において左側壁８の近くに位置するも
の）はその先端面が従来と同様に主壁５の内面に
のみ作用しているのに対し、前壁６に近い側の段
付きノツクピン１５は第１図および第６図に示す
ごとく先端側の外周部分に段１８が形成されてお
り、この段１８が前壁６から主壁５にわたつて内
向きに連設された捨てリブ２０の上端面に部分的
にかかつている点である。 What should be noted here is that the tip of the knock pin (located near the left wall 8 in FIG. 7) indicated by the reference numeral 14 acts only on the inner surface of the main wall 5, as in the conventional case. As shown in FIGS. 1 and 6, the stepped knock pin 15 on the side closer to the front wall 6 has a step 18 formed on the outer periphery of the tip side, and this step 18 extends from the front wall 6 to the main wall 5. This is a point that partially overlaps the upper end surface of the sacrificial rib 20 that extends inwardly.
すなわち、この捨てリブ２０は前壁６とテープ
リール遊動規制用立壁９との間のデツドスペース
に位置し、主壁５から垂直に立設されて前壁６の
内側面に直交状態でつながつている。 That is, this sacrificial rib 20 is located in a dead space between the front wall 6 and the tape reel movement regulating wall 9, stands vertically from the main wall 5, and is connected orthogonally to the inner surface of the front wall 6. .
この段付きノツクピン１５は段１８よりも先端
側の扁開状の外側面１９が捨てリブ20の一側面
（図では左側面）の一部に対する成形面となり、
また段１８が該リブ２０の突端面の一部に対する
成形面となつている。 In this stepped knock pin 15, a flat outer surface 19 on the tip side of the step 18 becomes a molding surface for a part of one side (the left side in the figure) of the sacrificial rib 20,
Further, the step 18 serves as a forming surface for a portion of the tip end surface of the rib 20.
しかるときは、第８図において成形後に成形品
を抜出すに際し、第２金型１７を外したのちノツ
クピン１４，１５群を突出させると、これらノツ
クピン１４，１５群の先端面が主壁５の内面を押
圧すると同時に、段付きノツクピン１５において
はその段１８で捨てリブ２０の上端面を押圧し、
深い成形空間の奥端から押出し作用を与えるの
で、この箇所での離型性が悪くても割れがなく確
実に押出される。 In such a case, when removing the molded product after molding as shown in FIG. At the same time as pressing the inner surface, the step 18 of the stepped knock pin 15 presses the upper end surface of the sacrificial rib 20,
Since the extrusion action is applied from the inner end of the deep molding space, even if the mold release properties are poor at this location, there will be no cracking and the product will be reliably extruded.
ケース本体１としては上下に略二等分した、い
わゆるハーフケースから構成されるものに限られ
ず、主壁５から立壁群を突設した下ケース１Ｂの
開口上面に扁平なプレート状の上ケース１Ａを蓋
合わせして一体結合するようにした形態でもよ
い。そうした場合には、本発明方法はその下ケー
ス１Ｂの製造に際して実施されることになる。
The case body 1 is not limited to a so-called half case that is divided into upper and lower halves, and may include a flat plate-shaped upper case 1A on the opening upper surface of a lower case 1B with a group of standing walls protruding from the main wall 5. It may also be in a form in which the lids are brought together and integrally joined. In such a case, the method of the present invention will be implemented when manufacturing the lower case 1B.
図面は本発明方法によつて得られるテープカー
トリツジを例示しており、第１図は要部の斜視
図、第２図は全体の外観斜視図、第３図はそのケ
ース本体を構成する上ケースと下ケースの分割斜
視図、第４図は上ケースの内面の平面図、第５図
は下ケースの内面の平面図、第６図は第５図にお
ける要部の拡大平面図、第７図は第５図における
Ａ−Ａ線での下ケースの金型成形状態を示す断面
図、第８図は成形後の成形品抜出し状態を示す断
面図である。
１……ケース本体、１Ａ……上ケース、１Ｂ…
…下ケース、５……主壁、６……前壁、７……後
壁、８……左右側壁、９……テープリール遊動規
制用の立壁、１４……ノツクピン、１５……段付
きノツクピン、１６……第１金型、１７……第２
金型、１８……段付きノツクピンの段、１９……
段付きノツクピンの段よりも先端側の外側面、２
０……捨てリブ、Ｇ……素材注入ゲート。
The drawings illustrate a tape cartridge obtained by the method of the present invention; FIG. 1 is a perspective view of the main parts, FIG. 2 is a perspective view of the overall appearance, and FIG. 3 is a top view of the case body. FIG. 4 is a plan view of the inner surface of the upper case, FIG. 5 is a plan view of the inner surface of the lower case, FIG. 6 is an enlarged plan view of the main parts in FIG. 5, and FIG. The figure is a sectional view taken along the line A--A in FIG. 5, showing the state of molding of the lower case with the mold, and FIG. 8 is a sectional view showing the state of removing the molded product after molding. 1...Case body, 1A...Upper case, 1B...
... Lower case, 5 ... Main wall, 6 ... Front wall, 7 ... Rear wall, 8 ... Left and right side walls, 9 ... Standing wall for regulating tape reel movement, 14 ... Knock pin, 15 ... Stepped dowel pin , 16...first mold, 17...second mold
Mold, 18... Step of stepped knock pin, 19...
Outer surface on the tip side of the stepped dowel pin, 2
0...Discarded rib, G...Material injection gate.
Claims (1)
が一体連設された上下分割式のテープカートリツ
ジ用ケースを製造するに際して、 主壁５の内面および立壁群を成形する第１金型
１６と、主壁５の外面を成形する第２金型１７
と、第１金型１６側に装備される成形品抜出し用
のノツクピン１４，１５群とを備えており、 これらノツクピン１４，１５群のうちの選ばれ
たノツクピン１５は、先端側の外周部分に段１８
が形成されていて、該段１８よりも先端側の外側
面１９が上記前壁６から主壁５にわたつて内向き
に連設される捨てリブ２０の側面の一部に対する
成形面になるとともに、該段１８が該捨てリブ２
０の突端面に対する成形面になるものとし、 両金型１６，１７の成形空間にプラスチツク素
材を射出して冷却固化させたのち両金型１６，１
７を分離し、 次にノツクピン１４，１５群を突出作動させて
成形品第１金型１６から抜出すときに、段付きノ
ツクピン１５の先端面で主壁５の内面を押圧する
と同時に、前記段１８で捨てリブ２０の突端面を
押圧するようにしたことを特徴とするテープカー
トリツジ用ケースの製造方法。[Scope of Claims] 1. When manufacturing a case for a tape cartridge of a vertically split type in which a group of standing walls including a front wall 6 are integrally connected from the inner surface of a flat main wall 5, the inner surface of the main wall 5 and the group of standing walls are A first mold 16 for molding the main wall 5, and a second mold 17 for molding the outer surface of the main wall 5.
and a group of knock pins 14 and 15 for ejecting the molded product, which are installed on the first mold 16 side, and a selected one of the groups of knock pins 14 and 15 is attached to the outer periphery of the tip side. Step 18
is formed, and the outer surface 19 on the distal side of the step 18 serves as a molding surface for a part of the side surface of the sacrificial rib 20 that extends inwardly from the front wall 6 to the main wall 5. , the stage 18 is the discarded rib 2
The plastic material is injected into the molding spaces of both molds 16 and 17, cooled and solidified, and then molded into molds 16 and 1.
7 is separated, and then the groups of dowel pins 14 and 15 are operated to protrude to pull out the molded product from the first mold 16. At the same time, when the tip surface of the stepped dowel pin 15 presses the inner surface of the main wall 5, A method for manufacturing a case for a tape cartridge, characterized in that the tip end surface of the sacrificial rib 20 is pressed in step 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23509789A JPH02168483A (en) | 1989-09-11 | 1989-09-11 | Manufacture of case for tape cartridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23509789A JPH02168483A (en) | 1989-09-11 | 1989-09-11 | Manufacture of case for tape cartridge |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1315282A Division JPS58130474A (en) | 1982-01-28 | 1982-01-28 | Manufacture of case for tape cartridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02168483A JPH02168483A (en) | 1990-06-28 |
| JPH0554197B2 true JPH0554197B2 (en) | 1993-08-11 |
Family
ID=16981016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23509789A Granted JPH02168483A (en) | 1989-09-11 | 1989-09-11 | Manufacture of case for tape cartridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02168483A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04137565U (en) * | 1991-02-13 | 1992-12-22 | 大日本印刷株式会社 | Cartridge case mold |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS624948Y2 (en) * | 1979-04-24 | 1987-02-04 | ||
| JPS56159224U (en) * | 1980-04-25 | 1981-11-27 |
-
1989
- 1989-09-11 JP JP23509789A patent/JPH02168483A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02168483A (en) | 1990-06-28 |
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