JPH0381125A - Injection die for cassette half - Google Patents

Injection die for cassette half

Info

Publication number
JPH0381125A
JPH0381125A JP17990489A JP17990489A JPH0381125A JP H0381125 A JPH0381125 A JP H0381125A JP 17990489 A JP17990489 A JP 17990489A JP 17990489 A JP17990489 A JP 17990489A JP H0381125 A JPH0381125 A JP H0381125A
Authority
JP
Japan
Prior art keywords
resin
cassette half
mold
retainer plate
gate
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.)
Granted
Application number
JP17990489A
Other languages
Japanese (ja)
Other versions
JP2707742B2 (en
Inventor
Hisanori Tanabe
田辺 久則
Yoshinobu Takeda
武田 與志信
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Publication of JPH0381125A publication Critical patent/JPH0381125A/en
Application granted granted Critical
Publication of JP2707742B2 publication Critical patent/JP2707742B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To make an external appearance favorable by making gate marks invisible from the outside by positioning the gate makes on the rear of a through hole part, by a method wherein a resin passage communicating with a resin casting port provided on a part of die corresponding to the inside of the through hole. CONSTITUTION:A cylindrical frame 4 is arranged within a movable retainer plate 2 by corresponding to the rear of a through hole part and a tonguelike resin casting port 5 is formed on a part of the cylindrical frame 4. Molten resin is fed into a cavity 3 through a resin passage 9, circular resin passage 6 and the resin casting port 5 of a retainer plate 1. In the case where a product is taken out by breaking a mold after molding, the product is moved along with the movable retainer plate 2 as it is stuck to the movable retainer plate 2. In the case where the product is released by projecting to the movable retainer plate 2 in succession, the resin in the resin casting port 5 part and resin passage 6 is left behind by sticking to the cylindrical frames 4, 7 and a support pin 8. Then a cylindrical frame 7 is projected, the resin in the resin casting port 5 and resin passage is released and removed from the die.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、主としてオーディオカセットハーフを射出成
形法で成形するカセットノ\−フの射出成形金型に関す
る。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention mainly relates to an injection mold for a cassette nof for molding an audio cassette half by an injection molding method.

〔従来の技術〕[Conventional technology]

一般に、この種のオーディオカセットハーフを射出成形
する場合には、カセットハーフの外表面を形成するキャ
ビ型とカセットハーフの内面を形成するコア型との間の
キャビティ内に、キャビ型内を流通してきた溶融樹脂を
、ゲートを介して供給することにより、製品を成形して
いる。
Generally, when injection molding this type of audio cassette half, the air flow inside the cavity mold is placed between the cavity mold forming the outer surface of the cassette half and the core mold forming the inner surface of the cassette half. The product is molded by supplying the molten resin through the gate.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

ところで、この場合、ゲートの位置をカセットハーフの
外表面に対応するキャビ型に設けると、成形されたカセ
ッ)・ハーフの外表面にゲート跡が残り、みばえが悪い
という問題かあり、外観−L機能上問題がないゲート位
置の選定が望まれている。
By the way, in this case, if the gate is located in the cavity mold corresponding to the outer surface of the cassette half, there is a problem that gate marks will remain on the outer surface of the molded cassette half, resulting in poor appearance. -L It is desired to select a gate position that does not cause any problems in terms of functionality.

本発明は、上記事情に鑑みてなされたもので、その目的
とするところは、カセットハーフの外表面にゲート跡が
残ることがなく、外観上1機能上問題が生じることがな
いカセットハーフの射出成形金型を提供することにある
The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide injection molding of a cassette half that does not leave gate marks on the outer surface of the cassette half and that does not cause problems in terms of appearance or functionality. Our goal is to provide molds.

〔課題を解決するための手段〕[Means to solve the problem]

上記目的を達成するために、本発明は、カセットハーフ
の貫通孔部の裏面に対応する金型の部位に樹脂注入口を
設け、この樹脂注入口に連通ずる樹脂通路をカセットハ
ーフの貫通孔の内側に対応する金型の部位に設けたもの
である。
In order to achieve the above object, the present invention provides a resin injection port in a part of the mold corresponding to the back side of the through hole of the cassette half, and connects a resin passage communicating with the resin injection port to the through hole of the cassette half. It is provided at the part of the mold that corresponds to the inside.

〔作用〕[Effect]

本発明のカセットハーフの射出成形金型にあっては、カ
セットハーフの貫通孔部の裏面に対応する金型の部位に
設けた樹脂注入口によってキャビティ内に溶融樹脂を供
給することにより、カセットハーフに残るゲート跡を貫
通孔部の裏面に位置させ、外部からゲート跡が見えない
ようにする。
In the cassette half injection mold of the present invention, the cassette half The gate marks remaining on the through-hole are located on the back side of the through-hole so that the gate marks are not visible from the outside.

〔実施例〕〔Example〕

以下、第1図ないし第11図に基づいて本発明の詳細な
説明する。
Hereinafter, the present invention will be explained in detail based on FIGS. 1 to 11.

第1図ないし第5図において符号1は固定型板であり、
この固定型板lに対向して可動型板2が開閉自在に設け
られている。そして、これらの型板1.2間に成形品(
カセットハーフ)形状をなすキャビティ3が形成されて
いる。上記固定型板Iは、受板を介して固定取付板に、
かつ可動型板2は、受板を介して可動取付板にそれぞれ
固定されている。 上記カセットハーフのリール軸挿入
孔(貫通孔)部の裏面に対応して第1筒状型体4が上記
可動型板2の内部に配置されている。そして、この第1
筒状型体4の一部には舌状のゲート5がキャビティ3に
連通して形成されており、このゲート5は円形状の樹脂
溜り(樹脂通路)6に連通されている。また、上記樹脂
溜り6の下面は、第1筒状型体4の内部に設置された第
2筒状型体7と、この第2WJ状型体7の内部に配置さ
れた支持ピン8とによって形成されていると共に、樹脂
溜り6の上面は固定型板1によって形成されている。そ
して、この樹脂溜り6の上面中央部に対向して、上記固
定型板lには樹脂通路9が形成されている。さらにまた
、上記支持ピン8の上部は凸状に形成され、かつ第2筒
状型体7の上部内側は環状に切欠かれている。
In FIGS. 1 to 5, reference numeral 1 represents a fixed mold plate;
A movable mold plate 2 is provided opposite to the fixed mold plate 1 so as to be openable and closable. The molded product (
A cavity 3 in the shape of a cassette half is formed. The fixed mold plate I is attached to the fixed mounting plate via the receiving plate,
The movable mold plates 2 are each fixed to a movable mounting plate via a receiving plate. A first cylindrical mold body 4 is disposed inside the movable mold plate 2 corresponding to the back surface of the reel shaft insertion hole (through hole) of the cassette half. And this first
A tongue-shaped gate 5 is formed in a part of the cylindrical mold body 4 so as to communicate with the cavity 3, and this gate 5 communicates with a circular resin reservoir (resin passage) 6. Further, the lower surface of the resin reservoir 6 is formed by a second cylindrical mold body 7 installed inside the first cylindrical mold body 4 and a support pin 8 disposed inside the second WJ-shaped mold body 7. At the same time, the upper surface of the resin reservoir 6 is formed by the fixed mold plate 1. A resin passage 9 is formed in the fixed mold plate l opposite the center of the upper surface of the resin reservoir 6. Furthermore, the upper part of the support pin 8 is formed in a convex shape, and the upper inner side of the second cylindrical mold body 7 is cut out in an annular shape.

上記のように構成された射出成形金型を用いてカセット
ハーフを成形する場合には、固定型板Iと可動型板2と
を合致させた型締状態において、固定型板lの樹脂通路
9を通して溶融樹脂を供給する。これにより、溶融樹脂
は、樹脂通路9を介して円形状の樹脂溜り6に入り、樹
脂溜り6から舌状のゲート5を介してキャビティ3内に
供給される。
When molding a cassette half using the injection mold configured as described above, in a clamped state in which the fixed mold plate I and the movable mold plate 2 are aligned, the resin passage 9 of the fixed mold plate I is The molten resin is supplied through. Thereby, the molten resin enters the circular resin reservoir 6 through the resin passage 9, and is supplied from the resin reservoir 6 into the cavity 3 through the tongue-shaped gate 5.

次いで、キャビティ3内を冷却して製品を形成した後、
型を開いて製品を取り出す。この場合、まず、固定型板
1と可動型板2間を開くと、製品は可動型板2側に付着
したまま、可動型板2とともに動く。続いて、製品を可
動型板2に対して突出して離型させる。この際、ゲート
5部及び樹脂溜り6の樹脂は、第1.第2筒状型体4.
7及び支持ピン8に付着して残る。そして、第2筒状型
体7を突出してゲート5及び樹脂溜り6の樹脂を離型さ
せ、吸盤にて吸着して金型から除去する。
Next, after cooling the inside of the cavity 3 and forming the product,
Open the mold and take out the product. In this case, first, when the fixed mold plate 1 and the movable mold plate 2 are opened, the product moves together with the movable mold plate 2 while remaining attached to the movable mold plate 2 side. Subsequently, the product is projected onto the movable mold plate 2 and released from the mold. At this time, the resin in the gate 5 portion and the resin reservoir 6 is the same as the first one. Second cylindrical body 4.
7 and the support pin 8. Then, the second cylindrical mold body 7 is projected to release the resin in the gate 5 and the resin reservoir 6, and the resin is removed from the mold by suction with a suction cup.

このようにして成形されたカセットハーフにあっては、
ゲート跡が、カセットハーフのリール軸挿入孔部の裏面
に生じているから、カセットの外方から見た場合にゲー
ト跡が見えず、外観上問題がない上に、リール軸を挿入
孔に挿入した場合にもまた、上記実施例にあっては、ゲ
ート5部においてキャビティ3内に成形された製品と樹
脂溜り6の樹脂とを分離する際に、両者の引き離しかう
まくいかず、製品側にゲート5部の樹脂が付いてくる場
合がある。これは、ゲート5部の樹脂の横断面積が小さ
いため、樹脂強度が十分でなく、所定の部分で円滑に分
離されにくいからであることがわかった。
In the cassette half formed in this way,
Since the gate marks are formed on the back side of the reel shaft insertion hole of the cassette half, the gate marks are not visible when viewed from the outside of the cassette, and there is no problem with appearance, and the reel shaft can be inserted into the insertion hole. Also, in the above embodiment, when the product molded in the cavity 3 and the resin in the resin reservoir 6 are separated at the gate 5, only the separation of the two is successful, and the product side The resin for gate 5 may be included. It has been found that this is because the cross-sectional area of the resin in the gate 5 portion is small, so the resin strength is not sufficient and it is difficult to separate smoothly at a predetermined portion.

この場合、第6図ないし第11図に示すように、樹脂溜
り6の上面を形成する固定型板lに、ゲート5に近づく
ほど上方に傾斜する傾斜溝部10を形成する。この傾斜
溝部lOは、第11図に示すように、ゲート5に近づく
ほど溝幅が狭くなる撥状に形成されたものである。
In this case, as shown in FIGS. 6 to 11, an inclined groove portion 10 is formed in the fixed mold plate l forming the upper surface of the resin reservoir 6 so as to be inclined upward as it approaches the gate 5. As shown in FIG. 11, this inclined groove portion 1O is formed in a cylindrical shape such that the groove width becomes narrower as it approaches the gate 5.

上記のように構成された射出成形金型にあっては、第1
図ないし第5図に示す上記実施例と同様に、キャビティ
3内の製品を取り出すために、固定型板lと可動型板2
間を開くと、製品は可動型板2側に付着したまま、可動
型板2とともに動き、り離型させる。この際、第1筒状
型体4の上面に形成された平面視舌状の凹曲面11と、
この凹曲面11に対向して固定型板■に形成された傾斜
溝部10とによって、ゲート5に至る樹脂通路が形成さ
れているから、ゲート5までの樹脂通路が、第1図に比
べて拡張することにより、製品との境界面で円滑に分離
される。そして、第2筒状型体7を突出してゲート5及
び樹脂溜り6の樹脂を離型させ、吸盤にて吸着して金型
から除去する。
In the injection mold configured as described above, the first
Similar to the above embodiment shown in FIGS.
When the gap is opened, the product moves together with the movable template 2 while remaining attached to the movable template 2, and is released from the mold. At this time, a concave curved surface 11 having a tongue shape in plan view formed on the upper surface of the first cylindrical mold body 4;
Since the resin passage leading to the gate 5 is formed by the inclined groove part 10 formed on the fixed mold plate 2 opposite to this concave curved surface 11, the resin passage up to the gate 5 is expanded compared to that in FIG. This allows for smooth separation at the interface with the product. Then, the second cylindrical mold body 7 is projected to release the resin in the gate 5 and the resin reservoir 6, and the resin is removed from the mold by suction with a suction cup.

このようにして得られたカセットハーフにあっては、第
1図ないし第5図に示す上記実施例と同様の効果が得ら
れる上に、製品とその他の固化樹脂との分離が円滑にか
つ確実に行われる。
The cassette half obtained in this manner not only provides the same effects as the above-mentioned embodiments shown in FIGS. 1 to 5, but also allows for smooth and reliable separation of the product from other solidified resin. It will be held on.

なお、第6図において、傾斜溝部IOの代わりに、二点
鎖線に示すように、凹所12を形成してもよい。
In addition, in FIG. 6, instead of the inclined groove portion IO, a recess 12 may be formed as shown by a two-dot chain line.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明は、カセットハーフの貫通
孔部の裏面に対応する金型の部位に樹脂注入口を設け、
この樹脂注入口に連通ずる樹脂通路を上記カセットハー
フの貫通孔の内側に対応する金型の部位に設けたもので
あるから、カセットハーフの貫通孔部の裏面に対応する
金型の部位に設けた樹脂注入口によってキャビティ内に
溶融樹脂を供給することにより、カセットハーフに残る
ゲート跡を貫通孔部の裏面に位置させ、外部からゲート
跡が見えないようにできて、外観上1機能上問題が生じ
ることがないという優れた効果を有する。
As explained above, the present invention provides a resin injection port in a part of the mold corresponding to the back side of the through-hole part of the cassette half,
Since the resin passage communicating with this resin injection port is provided in a part of the mold corresponding to the inside of the through-hole of the cassette half, it is provided in a part of the mold corresponding to the back side of the through-hole of the cassette half. By supplying molten resin into the cavity through the resin injection port, the gate marks left on the cassette half are located on the back side of the through hole, making the gate marks invisible from the outside and eliminating one functional problem in terms of appearance. It has the excellent effect of not causing any

【図面の簡単な説明】[Brief explanation of drawings]

第1図ないし第5図は本発明の一実施例を示すもので、
第1図は主要部の断面図、第2図は一部を断面視した側
面図、第3図は可動型板の平面図、第4図は樹脂溜り部
の詳細図、第5図はゲート部の詳細図、第6図ないし第
1.1図は本発明の他の実施例を示すもので、第6図は
主要部の断面図、第7図ないし第11図は固定型板の窓
入子部を示すもので、第7図は正面図、第8図は側面図
、第9図は断面図、第1O図は下面図、第11図は傾斜
溝部の詳細図である。 ・・・固定型板、 2・・・可動型板、 3・・・キャビティ、 5・・・ゲート (樹脂注入口) 6・・・樹脂溜り (樹脂 通路)
1 to 5 show an embodiment of the present invention,
Figure 1 is a cross-sectional view of the main part, Figure 2 is a side view with a part of it in cross-section, Figure 3 is a plan view of the movable template, Figure 4 is a detailed view of the resin reservoir, and Figure 5 is the gate. 6 to 1.1 show other embodiments of the present invention, FIG. 6 is a sectional view of the main part, and FIGS. 7 to 11 show windows of fixed templates. 7 is a front view, FIG. 8 is a side view, FIG. 9 is a sectional view, FIG. 1O is a bottom view, and FIG. 11 is a detailed view of the inclined groove portion. ...Fixed template, 2...Movable template, 3...Cavity, 5...Gate (resin injection port) 6...Resin reservoir (resin passage)

Claims (1)

【特許請求の範囲】[Claims] 金型間にキャビティを形成し、このキャビティ内に溶融
樹脂を供給してカセットハーフを射出成形するカセット
ハーフの射出成形金型において、上記カセットハーフの
貫通孔部の裏面に対応する金型の部位に樹脂注入口を設
け、この樹脂注入口に連通する樹脂通路を上記カセット
ハーフの貫通孔の内側に対応する金型の部位に設けたこ
とを特徴とするカセットハーフの射出成形金型。
In an injection mold for a cassette half in which a cavity is formed between the molds and a molten resin is supplied into the cavity to injection mold the cassette half, a part of the mold corresponding to the back side of the through-hole portion of the cassette half. An injection mold for a cassette half, characterized in that a resin injection port is provided in the cassette half, and a resin passage communicating with the resin injection port is provided in a portion of the mold corresponding to the inside of the through hole of the cassette half.
JP1179904A 1989-05-24 1989-07-12 Cassette half injection mold Expired - Lifetime JP2707742B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1-130428 1989-05-24
JP13042889 1989-05-24

Publications (2)

Publication Number Publication Date
JPH0381125A true JPH0381125A (en) 1991-04-05
JP2707742B2 JP2707742B2 (en) 1998-02-04

Family

ID=15034009

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1179904A Expired - Lifetime JP2707742B2 (en) 1989-05-24 1989-07-12 Cassette half injection mold

Country Status (1)

Country Link
JP (1) JP2707742B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63276519A (en) * 1987-05-08 1988-11-14 Sony Corp Injection molding device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63276519A (en) * 1987-05-08 1988-11-14 Sony Corp Injection molding device

Also Published As

Publication number Publication date
JP2707742B2 (en) 1998-02-04

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