JP3456017B2 - Disk cassette shell and mold device for molding the shell - Google Patents
Disk cassette shell and mold device for molding the shellInfo
- Publication number
- JP3456017B2 JP3456017B2 JP15252194A JP15252194A JP3456017B2 JP 3456017 B2 JP3456017 B2 JP 3456017B2 JP 15252194 A JP15252194 A JP 15252194A JP 15252194 A JP15252194 A JP 15252194A JP 3456017 B2 JP3456017 B2 JP 3456017B2
- Authority
- JP
- Japan
- Prior art keywords
- shell
- degrees
- molding
- mold
- side mold
- 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 - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、合成樹脂より射出成形
で作られるディスクカセットのシェル及びこの射出成形
に用いるシェル成形用金型装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cassette shell made of a synthetic resin by injection molding and a shell molding die device used for this injection molding.
【０００２】[0002]
【従来の技術】ディスクカセットは、接合された一対の
シェルを有し、この一対のシェル内にディスクが回転自
在に収納されている。図７（ａ），（ｂ）には上，下シ
ェル１，２の内面図がそれぞれ示されている。図７
（ａ），（ｂ）において、各シェル１，２の対向位置に
はディスク露出孔３がそれぞれ形成され、この各ディス
ク露出孔３はシャッタによって開閉される。又、下シェ
ル２の平板部２ａの中央にはハブ露出孔４が形成され、
このハブ露出孔４よりディスクの中央に固定されたハブ
が露出している。上シェル１の平板部１ａの中央には円
周リブ５が突設され、この円周リブ５によってディスク
のハブの位置が規制される。2. Description of the Related Art A disc cassette has a pair of joined shells, and the disc is rotatably accommodated in the pair of shells. 7 (a) and 7 (b) show inner views of the upper and lower shells 1 and 2, respectively. Figure 7
In (a) and (b), a disc exposure hole 3 is formed at a position where the shells 1 and 2 face each other, and the disc exposure hole 3 is opened and closed by a shutter. Further, a hub exposure hole 4 is formed at the center of the flat plate portion 2a of the lower shell 2,
The hub fixed to the center of the disk is exposed through the hub exposure hole 4. A circle is formed in the center of the flat plate portion 1a of the upper shell 1.
A circumferential rib 5 is provided so as to project, and the circumferential rib 5 regulates the position of the hub of the disk.
【０００３】上記一対のシェル１，２は、合成樹脂より
射出成形でそれぞれ作られる。図８に示す如く、シェル
成形用金型装置６はシェル１又は２の外面形状に対応す
る成形凹部７ａを有する固定側金型７とシェル１又は２
の内面形状に対応する成形凸部８ａを有する可動側金型
８とを備え、この可動側金型８を固定側金型７に対して
接着する位置とする。この接着位置で成形凹部７ａと成
形凸部８ａによって構成される樹脂注入空間に溶融合成
樹脂を注入する。そして、溶融合成樹脂の固化後に可動
側金型８を固定側金型７に対して離間する位置とし、可
動側金型８の成形凸部８ａに張り付いたシェル１又は２
を引き離す。The pair of shells 1 and 2 are made of synthetic resin by injection molding. As shown in FIG. 8, the shell molding die device 6 includes a fixed mold 7 having a molding recess 7 a corresponding to the outer surface shape of the shell 1 or 2 and the shell 1 or 2.
And a movable side mold 8 having a molding convex portion 8a corresponding to the inner surface shape of the movable side mold 8, and the movable side mold 8 is bonded to the fixed side mold 7. At this bonding position, the molten synthetic resin is injected into the resin injection space formed by the molding concave portion 7a and the molding convex portion 8a. Then, after the molten synthetic resin is solidified, the movable mold 8 is set to a position separated from the fixed mold 7, and the shell 1 or 2 attached to the molding convex portion 8a of the movable mold 8.
Pull away.
【０００４】この可動側金型８からシェル１又は２を離
す離型時にはシェル１又は２に離型抵抗がかかり、この
離型抵抗によってシェル１又は２に反りが発生する。こ
こで、下シェル２はその形状ゆえに離型抵抗が小さく、
合成樹脂の充填量により反りをキャンセルするよう調整
可能である。ところが、上シェル１は中央に円周リブ５
が設けられ、この円周リブ５による離型抵抗が大きいた
めに合成樹脂の充填量によっては反りをキャンセルする
調整が困難である。そのため、上シェル１の場合は、固
定側金型７に対して可動側金型８の型温を約１０度低く
設定し、上シェル１の外面側温度より内面側温度を低く
することによって図９に示すような内面中央部が突出す
る反り形状となるのを防止していた。At the time of releasing the shell 1 or 2 from the movable side die 8, a releasing resistance is applied to the shell 1 or 2, and the shell 1 or 2 is warped by the releasing resistance. Here, the lower shell 2 has a small release resistance because of its shape,
The amount of synthetic resin can be adjusted to cancel the warp. However, the upper shell 1 has a circumferential rib 5 at the center.
Since the circumferential rib 5 has a large release resistance, it is difficult to adjust the warp depending on the filling amount of the synthetic resin. Therefore, in the case of the upper shell 1, the mold temperature of the movable mold 8 is set to be about 10 degrees lower than that of the fixed mold 7, and the inner surface temperature is set lower than the outer surface temperature of the upper shell 1. It was prevented that the central portion of the inner surface as shown in FIG.
【０００５】[0005]
【発明が解決しようとする課題】ところが、固定側金型
７と可動側金型８との温度差が大きいと、金型装置６の
縦押切部で、且つ、金型の膨張方向の箇所に損傷が発生
し、以下、これを具体的に説明する。However, if there is a large temperature difference between the fixed-side mold 7 and the movable-side mold 8, there is a vertical press-cut portion of the mold device 6 and a position in the expansion direction of the mold. Damage occurs, which will be described in detail below.
【０００６】図７のＡ部の拡大図が図１０（ａ）に示さ
れ、この部分の成形状態を示す金型装置の一部断面図が
図１０（ｂ）に示されている。図１０（ａ）において、
平板部１ａの外周縁には接合用壁９が設けられ、この接
合用壁９の一部が内側にＵ字状に入り込むよう構成され
ている。そして、このＵ字状の部分によってカセット引
き込み用溝１０が構成されている。図１０（ｂ）におい
て、固定側金型７にはカセット引き込み用溝１０部分の
外面形状に対応する成形凹部７ａが設けられ、又、可動
側金型８にはカセット引き込み用溝１０部分の内面形状
に対応する成形凸部８ａが設けられている。そして、こ
の成形凹部７ａと成形凸部８ａ以外の互いの突き合わせ
面７ｂ，８ｂ同士は密着状態であるが、この突き合わせ
面自体は同一平面ではなく一箇所に段差面があり、この
段差部分が各金型７，８の縦押切部７ｃ，８ｃとして構
成されている。従って、温度差による膨張差があると、
縦押切部７ｃ，８ｃでは固定側金型７の膨張量が大きい
ために押切が強くなり、これによって金型装置６に損傷
が発生し、その結果、成形品にバリが発生するという欠
点があった。FIG. 10 (a) is an enlarged view of the portion A of FIG. 7, and FIG. 10 (b) is a partial cross-sectional view of the mold apparatus showing the molding state of this portion. In FIG. 10 (a),
A joining wall 9 is provided on the outer peripheral edge of the flat plate portion 1a, and a part of the joining wall 9 is configured to enter the inside of the U-shape. The U-shaped portion constitutes the cassette pull-in groove 10. In FIG. 10 (b), the fixed side mold 7 is provided with a molding recess 7a corresponding to the outer surface shape of the cassette pull-in groove 10 part, and the movable side mold 8 is provided with the inner surface of the cassette pull-in groove 10 part. A molding convex portion 8a corresponding to the shape is provided. The abutting surfaces 7b, 8b other than the molding concave portion 7a and the molding convex portion 8a are in close contact with each other, but the abutting surface itself is not in the same plane and has a step surface at one place. The molds 7 and 8 are configured as vertical pressing sections 7c and 8c. Therefore, if there is a difference in expansion due to temperature difference,
In the vertical push-cut portions 7c and 8c, since the expansion amount of the fixed-side mold 7 is large, the push-cut force becomes strong, which causes damage to the mold device 6, resulting in burrs on the molded product. It was
【０００７】そこで、本発明は、反りの発生しない成形
品を作るに際して金型の損傷によるバリの発生頻度を極
力減少させることが可能なディスクカセットのシェル及
びこれに用いるシェル成形用金型装置を提供することを
課題とする。Therefore, the present invention provides a disk cassette shell capable of reducing the occurrence frequency of burrs due to damage to the mold as much as possible when producing a molded product without warpage, and a shell molding mold device used for the shell. The challenge is to provide.
【０００８】[0008]
【課題を解決するための手段】上記課題を達成するため
の本発明に係るディスクカセットのシェルは、平板部の
内面中央にディスクのハブの位置を規制する円周リブを
突設したディスクカセットのシェルにおいて、この円周
リブの内側立設面と外側立設面との各傾斜角を、内側立
設面の傾斜角を３度より大きく１０度以内の値に、外側
立設面の傾斜角を２度より大きく４度以内の値にそれぞ
れ立設方向に対して大きく設定したものである。DISCLOSURE OF THE INVENTION A disk cassette shell according to the present invention for achieving the above object is a disk cassette in which a circumferential rib for restricting a position of a disk hub is provided at a center of an inner surface of a flat plate portion. in the shell, the respective inclination angles of the inner standing設面and outside elevational設面the circumferential rib, the inner standing
Set the tilt angle of the installation surface to a value greater than 3 degrees and within 10 degrees, and
Set the inclination angle of the standing surface to a value greater than 2 degrees and within 4 degrees.
This is a large setting with respect to the standing direction.
【０００９】また、シェル成形用金型装置は、シェルの
外面形状に対応する凹部を有する固定側金型と、この固
定側金型に離着可能で、前記シェルの内面形状に対応す
る凹部を有する可動側金型とを備え、この可動側金型が
前記固定側金型に接着した状態で双方の凹部によって樹
脂注入空間を構成するシェル成形用金型装置において、
前記可動側金型の前記凹部にあって、前記シェルの円周
リブの内側立設面と外側立設面との各対応溝傾斜角を、
内側立設面の対応溝傾斜角を３度より大きく１０度以内
の値に、外側立設面の対応溝傾斜角を２度より大きく４
度以内の値にそれぞれ垂下方向に対して大きく設定した
ものである。Further, the shell molding die device has a fixed side mold having a concave portion corresponding to the outer surface shape of the shell and a concave portion corresponding to the inner surface shape of the shell, which is detachable from the fixed side mold. A movable molding die having, wherein a shell molding mold device that forms a resin injection space by both concave portions in a state in which the movable mold is bonded to the fixed mold,
In the recess of the movable side mold, the corresponding groove inclination angles of the inner standing surface and the outer standing surface of the circumferential rib of the shell,
The corresponding groove inclination angle of the inner standing surface is greater than 3 degrees and within 10 degrees
To the value of, the corresponding groove inclination angle of the outer standing surface is larger than 2 degrees and 4
It is set to a value within a degree and is large in the drooping direction.
【００１０】[0010]
【作用】円周リブの内側立設面と外側立設面との各傾斜
角が大きく、これに対応して可動側金型の各対応溝傾斜
角も大きいため、円周リブの抜き勾配が大きくなる分、
離型抵抗が小さくなり成形品のシェルの内面中央が凸状
に反る量が減少し、その結果、固定側金型と可動側金型
との温度差を小さくしても反りの発生しないシェルが成
形される。[Function] Since the inclination angle between the inner standing surface and the outer standing surface of the circumferential rib is large and the corresponding groove inclination angle of the movable mold is also large, the draft of the circumferential rib is reduced. The larger
Mold release resistance decreases and the amount of convexity of the center of the inner surface of the shell of the molded product decreases, and as a result, warpage does not occur even if the temperature difference between the fixed side mold and the movable side mold is reduced. Is molded.
【００１１】[0011]
【実施例】以下、本発明の実施例を図面を用いて説明す
る。図１から図６には本発明の一実施例が示されてい
る。図１（ａ）には上シェル１の内面図が、図１（ｂ）
には図１（ａ）のＡ−Ａ線拡大断面図がそれぞれ示され
ている。図１（ａ），（ｂ）において、上記従来例と比
較して上シェル１の構成上異なるのは、円周リブ５の内
側立設面５ａと外側立設面５ｂの各傾斜角θ1，θ2のみ
であり、この各傾斜角θ1，θ2が立設方向ｍに対して従
来では３度と２度であったがこれよりも大きく設定され
ている。具体的には傾斜角θ1は３度より大きく１０度
以内の値に設定され、傾斜角θ2は２度より大きく４度
以内の値に設定される。Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show an embodiment of the present invention. FIG. 1A shows an inner view of the upper shell 1, and FIG.
1A and 1B are enlarged sectional views taken along line AA of FIG. 1 (a) and 1 (b), the difference in the configuration of the upper shell 1 compared with the above-mentioned conventional example is that the inclination angles θ 1 of the inner standing surface 5a and the outer standing surface 5b of the circumferential rib 5 are different. , Θ 2 only, and the respective inclination angles θ 1 and θ 2 are 3 and 2 degrees in the conventional case with respect to the standing direction m, but are set larger than this. Specifically, the inclination angle θ 1 is set to a value greater than 3 degrees and within 10 degrees, and the inclination angle θ 2 is set to a value greater than 2 degrees and within 4 degrees.
【００１２】図２に示すように、上シェル１の成形に用
いる可動側金型８も上記設計変更に対応して各対応溝傾
斜角θ1，θ2が設定されている。即ち、対応溝傾斜角θ
1，θ2が垂下方向ｎに対して上記と同様の値に設定され
ている。As shown in FIG. 2, the movable mold 8 used for molding the upper shell 1 also has corresponding groove inclination angles θ 1 and θ 2 corresponding to the above design changes. That is, the corresponding groove inclination angle θ
1 and θ 2 are set to the same values as above with respect to the drooping direction n.
【００１３】上記構成において、円周リブ５の内側立設
面５ａと外側立設面５ｂとの各傾斜角θ1，θ2が大き
く、これに対応して可動側金型８の各対応溝傾斜角
θ1，θ2が大きいため、円周リブ５の抜き勾配が大きく
なる分、離型抵抗が小さくなり、離型抵抗に基づく上シ
ェル１の内面中央の凸状の反り量が小さくなる。その結
果、反りの発生しない上シェル１を成形するのに、固定
側金型７と可動側金型８との温度差を小さくしても良
く、金型の損傷によるバリの発生頻度が押えられる。In the above construction, the inclination angles θ 1 and θ 2 between the inner standing surface 5a and the outer standing surface 5b of the circumferential rib 5 are large, and corresponding grooves of the movable side mold 8 are correspondingly large. Since the inclination angles θ 1 and θ 2 are large, the draft of the circumferential rib 5 is large, so that the mold release resistance is small, and the amount of convex warp in the center of the inner surface of the upper shell 1 based on the mold release resistance is small. . As a result, in molding the upper shell 1 in which warpage does not occur, the temperature difference between the fixed-side mold 7 and the movable-side mold 8 may be reduced, and the occurrence frequency of burrs due to damage to the mold can be suppressed. .
【００１４】次に、内側立設面５ａの傾斜角θ1を１０
度、外側立設面５ｂの傾斜角θ2を４度に設定した場合
と従来例（傾斜角θ1が３度、傾斜角θ2が２度）の場合
との反り量を比較する。図３に示すＡ，Ｂ点を平面度の
測定ポイントとし、図４に示すように（＋）方向を内反
り方向、（−）方向を外反り方向とすると、Ａ，Ｂ点に
おいて図５（ａ），（ｂ）に示すような結果が出た。即
ち、上シェル１は従来例では内反りであるが、本実施例
では外反りであり、この測定結果からも成形時の反りを
キャンセルするための固定側金型７と可動側金型８との
温度差を小さくできることがわかる。Next, the inclination angle θ 1 of the inner standing surface 5a is set to 10
The amount of warpage is compared between the case where the inclination angle θ 2 of the outer standing surface 5b is set to 4 degrees and the case of the conventional example (the inclination angle θ 1 is 3 degrees and the inclination angle θ 2 is 2 degrees). Assuming that the points A and B shown in FIG. 3 are flatness measurement points, the (+) direction is the inward warp direction, and the (−) direction is the outward warp direction, as shown in FIG. The results shown in a) and (b) were obtained. That is, the upper shell 1 is an inner warp in the conventional example, but is an outer warp in the present embodiment, and from this measurement result, the fixed side mold 7 and the movable side mold 8 for canceling the warp at the time of molding are also formed. It can be seen that the temperature difference can be reduced.
【００１５】尚、平面度とは、専用測定器の基準平面板
のゼロ点に対する測定物の偏差の値である。The flatness is the value of the deviation of the measured object from the zero point of the reference plane plate of the dedicated measuring instrument.
【００１６】また、外側立設面５ｂは、ディスクのハブ
が当接する面であるので、この傾斜をあまり緩くすると
製品機能上支障があるため４度が限界であるが、内側立
設面５ａについては上記のような制約はない。しかし、
内側立設面５ａの傾斜角θ1を１０度より大きな値とし
た場合、図６に示す如く円周リブ５の根元の寸法Ｌが大
きくなりヒケが発生しやすくなるため、内側の抜き勾配
は１０度が限界である。従って、内側立設面５ａの傾斜
角θ1（及び対応溝傾斜溝）が１０度、外側立設面５ｂ
の傾斜角θ2（及び対応溝傾斜溝）が４度の場合が最も
好ましい。Further, since the outer standing surface 5b is a surface with which the hub of the disk comes into contact, if the inclination is made too loose, the function of the product will be impaired, so that the limit is 4 degrees. Does not have the above restrictions. But,
When the inclination angle θ 1 of the inner standing surface 5a is set to a value larger than 10 degrees, the dimension L at the base of the circumferential rib 5 becomes large as shown in FIG. The limit is 10 degrees. Therefore, the inclination angle θ 1 (and the corresponding groove inclination groove) of the inner standing surface 5a is 10 degrees, and the outer standing surface 5b is
It is most preferable that the inclination angle θ 2 (and the corresponding groove inclination groove) is 4 degrees.
【００１７】尚、実施例では、固定側金型７に成形凹部
７ａを形成し、可動側金型８に成形凸部８ａを形成した
場合について示したが、固定側金型７に成形凹部を、可
動側金型８に成形凸部をそれぞれ形成しても良い。In the embodiment, the fixed concave mold 7 is formed with the molding concave portion 7a and the movable movable mold 8 is formed with the molding convex portion 8a. However, the fixed concave mold 7 is formed with the molding concave portion 7a. The molding convex portions may be formed on the movable side mold 8.
【００１８】[0018]
【発明の効果】以上述べたように本発明によれば、シェ
ルの円周リブの内側立設面と外側立設面との各傾斜角
を、内側立設面の傾斜角を３度より大きく１０度以内の
値に、外側立設面の傾斜角を２度より大きく４度以内の
値にそれぞれ大きく設定し、これに対応する可動側金型
の対応溝傾斜角をこれに合わせて、内側立設面の対応溝
傾斜角を３度より大きく１０度以内の値に、外側立設面
の対応溝傾斜角を２度より大きく４度以内の値にそれぞ
れ大きく設定したので、固定側金型と可動側金型との温
度差を小さくしても反りの発生しないシェルを成形でき
るため、金型の損傷によるバリの発生頻度を極力減少さ
せることができるという効果がある。As described above, according to the present invention, the inclination angles of the inner standing surface and the outer standing surface of the circumferential rib of the shell are larger than 3 degrees. Within 10 degrees
The inclination angle of the outer standing surface is greater than 2 degrees and within 4 degrees.
The corresponding groove inclination angle of the movable mold corresponding to this value is set to a large value, and the corresponding groove on the inner standing surface is adjusted accordingly.
Inclination angle greater than 3 degrees and within 10 degrees
Corresponding groove inclination angle is set to a value greater than 2 degrees and within 4 degrees
Since it is set to a large value, it is possible to mold a shell that does not warp even if the temperature difference between the fixed side mold and the movable side mold is reduced, so the frequency of burrs due to damage to the mold can be reduced as much as possible. There is an effect.
【図１】（ａ）は上シェルの内面図、（ｂ）は（ａ）の
Ａ−Ａ線拡大断面図（実施例）。FIG. 1A is an inner view of an upper shell, and FIG. 1B is an enlarged cross-sectional view taken along line AA of FIG.
【図２】金型装置の一部断面図（実施例）。FIG. 2 is a partial cross-sectional view of a mold device (example).
【図３】測定ポイントを示す上シェルの外面図（実施
例）。FIG. 3 is an external view of an upper shell showing a measurement point (Example).
【図４】反り方向を示す上シェルの側面図（実施例）。FIG. 4 is a side view of an upper shell showing a warp direction (example).
【図５】（ａ），（ｂ）はそれぞれ傾斜角に対する平面
度状態を示す特性線図（実施例）。5A and 5B are characteristic line diagrams (examples) showing flatness states with respect to inclination angles.
【図６】上シェルの一部拡大断面図（実施例）。FIG. 6 is a partially enlarged sectional view of an upper shell (example).
【図７】（ａ）は上シェルの内面図、（ｂ）は下シェル
の内面図（従来例）。7A is an inside view of the upper shell, and FIG. 7B is an inside view of the lower shell (conventional example).
【図８】金型装置の概略構成図（従来例）。FIG. 8 is a schematic configuration diagram of a mold device (conventional example).
【図９】反り状態を示す上シェルの断面図（従来例）。FIG. 9 is a cross-sectional view of an upper shell showing a warped state (conventional example).
【図１０】（ａ）は上シェルの一部拡大内面図、（ｂ）
は（ａ）のＢ−Ｂ線に沿う金型装置の一部拡大断面図
（従来例）。10 (a) is a partially enlarged internal view of the upper shell, FIG. 10 (b).
FIG. 7A is a partially enlarged cross-sectional view of the mold device taken along line BB in FIG.
１…上シェル（シェル） １ａ…平板部 ５…円周リブ ５ａ…内側立設面 ５ｂ…外側立設面 ６…シェル成形用金型装置 ７…固定側金型 ７ａ…成形凹部 ８…可動側金型 ８ａ…成形凸部 1 ... Upper shell (shell) 1a ... Flat plate part 5 ... Circumferential rib 5a ... Inside standing surface 5b ... Outer standing surface 6 ... Mold device for shell molding 7 ... Fixed side mold 7a ... Molding recess 8 ... Movable mold 8a ... Molded convex portion
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G11B 23/03 604 G11B 23/113 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) G11B 23/03 604 G11B 23/113
Claims (2)
置を規制する円周リブを突設したディスクカセットのシ
ェルにおいて、この円周リブの内側立設面と外側立設面
との各傾斜角を、内側立設面の傾斜角を３度より大きく
１０度以内の値に、外側立設面の傾斜角を２度より大き
く４度以内の値にそれぞれ立設方向に対して大きく設定
したことを特徴とするディスクカセットのシェル。1. A shell of a disc cassette, wherein a circumferential rib for restricting the position of a hub of the disc is provided at the center of the inner surface of the flat plate portion, the inclination of the inner standing surface and the outer standing surface of the circumferential rib. Angle, the angle of inclination of the inner standing surface is greater than 3 degrees
The inclination angle of the outer standing surface is larger than 2 degrees within 10 degrees.
A disc cassette shell characterized by being set to a value within 4 degrees to a large extent in the standing direction.
有する固定側金型と、この固定側金型に離着可能で、前
記シェルの内面形状に対応する成形凸部を有する可動側
金型とを備え、この可動側金型が前記固定側金型に接着
した状態で成形凹部と成形凸部によって樹脂注入空間を
構成するシェル成形用金型装置において、前記可動側金
型の前記成形凸部にあって、前記シェルの円周リブの内
側立設面と外側立設面との各対応溝傾斜角を、内側立設
面の対応溝傾斜角を３度より大きく１０度以内の値に、
外側立設面の対応溝傾斜角を２度より大きく４度以内の
値にそれぞれ垂下方向に対して大きく設定したことを特
徴とするシェル成形用金型装置。2. A fixed-side mold having a molding recess corresponding to the outer surface shape of the shell, and a movable-side mold detachable from the fixed-side mold and having a molding projection corresponding to the inner surface shape of the shell. In the shell molding die device, in which the movable side mold is bonded to the fixed side mold to form a resin injection space by the molding concave part and the molding convex part, the molding convex part of the movable side mold is provided. in the section, each corresponding groove inclination angle between the inner upright設面and outside elevational設面circumferential rib of the shell, inner standing
Set the corresponding groove inclination angle of the surface to a value greater than 3 degrees and within 10 degrees,
The corresponding groove inclination angle of the outer standing surface is greater than 2 degrees and within 4 degrees
The mold device for shell molding is characterized in that the respective values are set to be large in the hanging direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15252194A JP3456017B2 (en) | 1994-07-05 | 1994-07-05 | Disk cassette shell and mold device for molding the shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15252194A JP3456017B2 (en) | 1994-07-05 | 1994-07-05 | Disk cassette shell and mold device for molding the shell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0822685A JPH0822685A (en) | 1996-01-23 |
| JP3456017B2 true JP3456017B2 (en) | 2003-10-14 |
Family
ID=15542262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15252194A Expired - Fee Related JP3456017B2 (en) | 1994-07-05 | 1994-07-05 | Disk cassette shell and mold device for molding the shell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3456017B2 (en) |
-
1994
- 1994-07-05 JP JP15252194A patent/JP3456017B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0822685A (en) | 1996-01-23 |
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|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080801 Year of fee payment: 5 |
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