JPS59106944A - Method for insert injection molding of leaf spring for tape cassette - Google Patents
Method for insert injection molding of leaf spring for tape cassetteInfo
- Publication number
- JPS59106944A JPS59106944A JP57217209A JP21720982A JPS59106944A JP S59106944 A JPS59106944 A JP S59106944A JP 57217209 A JP57217209 A JP 57217209A JP 21720982 A JP21720982 A JP 21720982A JP S59106944 A JPS59106944 A JP S59106944A
- Authority
- JP
- Japan
- Prior art keywords
- leaf spring
- film sheet
- resin
- resin film
- spring
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ビデオテープレコーダーに使用されるテープ
カセット用板ばねのインサート射出成形法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an insert injection molding method for a leaf spring for a tape cassette used in a video tape recorder.
従来例の構成とその問題点
従来のテープカセットは第１図〜第３図にその具体構成
を示すように上ハーフ１と下ハーフ２に２ページ
よって筐体を構成し、磁気テープ４を巻回したリール４
を収納し、前記」ニハー７１に突設したボス６を超音波
溶接法により固定されたリール押えばね６でリール４を
押圧するものである。この構成において、リール押えば
ね６は、超音波溶着機の振動熱を用い工具ホーン７の先
端部７ａの形状とほぼ同じ形で固着されるが、超音波溶
着により、ボス６の樹脂カスの発生、固着部８の端部８
ａのパリの発生等で部品の洗浄および管理が必要であり
、品質上、また組立」二において問題があった。Structure of the conventional example and its problems As shown in FIGS. 1 to 3, the conventional tape cassette has a housing made up of two pages in the upper half 1 and the lower half 2, and the magnetic tape 4 is wound thereon. Spun reel 4
The reel 4 is pressed by a reel pressing spring 6 which has a boss 6 protruding from the Nihar 71 fixed by ultrasonic welding. In this configuration, the reel presser spring 6 is fixed in almost the same shape as the tip 7a of the tool horn 7 using vibration heat of an ultrasonic welding machine, but due to ultrasonic welding, resin scum on the boss 6 is generated. , end 8 of fixed part 8
Parts had to be cleaned and controlled due to the occurrence of dust, etc., and there were problems in terms of quality and assembly.
発明の目的
本発明は、従来の欠点を解消するものであり、組立工程
を合理化するものである。OBJECTS OF THE INVENTION The present invention overcomes the drawbacks of the prior art and streamlines the assembly process.
発明の構成
本発明は、片側に樹脂フィルムシートのはられたリール
押え板ばねを用い、射出成形工程でインサート成形し、
ばね性を確保する金属と樹脂の分離のだめ、樹脂フィル
ムシートと樹脂部分を密着させ、樹脂フィルムシートと
金属を分離させたリール押え板ばねを上ハーフに固定す
る構成により３べ、−ミψ
品質面の向上がはかれ、組立工程の合理化面で、きわめ
て有利である。Structure of the Invention The present invention uses a reel presser plate spring with a resin film sheet attached on one side, and insert molding is performed in an injection molding process.
By separating the metal and resin to ensure spring properties, the resin film sheet and the resin part are brought into close contact, and the reel presser plate spring, which separates the resin film sheet and metal, is fixed to the upper half, resulting in 3mm, -miψ quality. It is extremely advantageous in terms of improving surface quality and streamlining the assembly process.
実施例の説明
以下に本発明の一実施例を第４図〜第６図にもとづいて
説明する。第４図において、９は可動側型板、１ｏは固
定側型板であり、可動側型板９には、製品突き出しのだ
めのエジェクタービン用のガイド穴９ａ、押えばね固定
のだめの減圧用穴９ｂ。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4 to 6. In FIG. 4, 9 is a movable side template, and 1o is a fixed side template. The movable side template 9 includes a guide hole 9a for the eject turbine for ejecting the product, and a depressurizing hole 9b for the spring fixing reservoir. .
押えばね固定用ボス成形のための凹部９ｃ、 および、
樹脂フィルムシート１１を貼り付けた弓状のばね性を有
する金属性リール部えばね１２の金属の肉厚と同じ深さ
で、リール部えばねよりわずかに面積が大きな、押えば
ね固定用の凹部９ｄが設けられている。固定側型板１０
には、樹脂の充填のためゲー）１０ａが設けてあり、ホ
ットランナ−ノズル１３が挿入できる。以上のように構
成された金型においてその成形工程を説明する。a recess 9c for forming a boss for fixing the presser spring, and
A concave part for fixing the presser spring, which has the same depth as the metal wall thickness of the metal reel spring 12 having an arcuate elasticity to which the resin film sheet 11 is attached, and has a slightly larger area than the reel spring. 9d is provided. Fixed side template 10
10a is provided for filling with resin, into which a hot runner nozzle 13 can be inserted. The molding process for the mold configured as described above will be explained.
捷ず射出成形工程の開始時に樹脂フィルムシート１１を
貼り付けた弓状のリール部えばね１２の挿入後、減圧用
穴９ｂから減圧が行なわれ、リール部えばね１２は、可
動側型板の押えばね固定用凹部９ｄに固定される 固定
後に可動側型板９は矢印入方向に移動し、第６図に示す
ように型締される。型締完了後に可動側型板９と、固定
側型板１ｏによらて形成された空間部１４にホットラン
ナ−ノズル１３からゲー１−１０− ａを通って樹脂が
充填され、リール部えげね１２の中央部に設けられた穴
１２−ａを通った樹脂は可動側型板９に設けられた押え
バネ固定用ボス形成のための凹部９Ｃにも充填され完全
にリール部えバネ１２は固定される 同時に充填された
溶融樹脂１６は樹脂フィルムシートの表面層と相溶する
。After inserting the arcuate reel spring 12 to which the resin film sheet 11 is attached at the start of the injection molding process, the pressure is reduced from the pressure reduction hole 9b, and the reel spring 12 is inserted into the movable mold plate. After being fixed in the pressing spring fixing recess 9d, the movable mold plate 9 moves in the direction of the arrow and is clamped as shown in FIG. After the mold clamping is completed, the space 14 formed by the movable mold plate 9 and the fixed mold plate 1o is filled with resin from the hot runner nozzle 13 through the gauge 1-10-a, and the reel part is dented. The resin that has passed through the hole 12-a provided in the center of the spring 12 also fills the recess 9C provided in the movable template 9 for forming a boss for fixing the presser spring, and the reel spring 12 is completely fixed. The molten resin 16 that is fixed and filled at the same time is compatible with the surface layer of the resin film sheet.
充填後、保圧行程、冷却行程を経た後、固定側型板１ｏ
と可動側型板９の嵌合によって形成された空間部１４に
よって形成された上ハーフ１６は１７のエジェクタービ
ンによって突き出される。After filling, after passing through the pressure holding process and cooling process, the fixed side template 1o
The upper half 16 formed by the space 14 formed by the fitting of the movable template 9 and the movable template 9 is ejected by an ejector turbine 17.
そして第６図に示す」：うに、リール部えばね１２は、
」二記の成形工程で形成されたボス１６ａにより、精度
よく固定され、樹脂フィルムシート１１と押えばね１２
の吸着力は、樹脂フィルムシート６ペーコー
１１と樹脂１６との吸着力よりはるかに弱いため、本来
の弓状の形状にもどり、良好なばね性を確保する。And as shown in Figure 6, the reel spring 12 is
The bosses 16a formed in the molding process described in 2.
Since the adsorption force between the resin film sheet 6 and the resin 16 is much weaker than the adsorption force between the resin film sheet 6 and the resin 16, it returns to its original arcuate shape and maintains good springiness.
発明の効果
以上のように本発明は、カセットケースの射出成形工程
において、リール部えばね１２の組立ても同時に行なう
ことができるため、組立工程が合理化されるとともに、
リール部えばね１２の装着方法がインサート成形による
ものであるため、溶着による方法と比較すると、樹脂カ
スの発生、バリの発生、１．だ溶着熱による樹脂材料の
局部劣化というトラブルが解消されると同時に、装着強
度あるいは装着の精度がよくなるため、品質面・信頼性
の面で実用的効果は大なるものである。Effects of the Invention As described above, in the present invention, the reel spring 12 can be assembled at the same time during the injection molding process of the cassette case, so the assembly process is streamlined.
Since the reel spring 12 is attached by insert molding, compared to the welding method, there are problems such as generation of resin scum, burrs, etc. This solves the problem of local deterioration of the resin material due to welding heat, and at the same time improves the mounting strength and accuracy, which has great practical effects in terms of quality and reliability.
１；を
第１図の従来のテープカセットのリール部の断面図、第
２図は従来のテープカセット上ハーフの平面図、第３図
は同要部断面図、第４図は本発明の一実施例における型
開き状態の金型の断面図、第６図は同型閉じ状態の断面
図、第６図は成形品６ページ
の断面図である。
９・・・・・・可動側型板、９ａ・・・・・・ガイド穴
、９ｂ・・・・・・減圧用穴、９Ｃ・・・・・・凹部、
９ｄ・・・・・・凹部、１゜・・・・・・固定側型板、
１０ａ・・・・・・ゲート、１１・・・・・・フィルム
シート、１２・・・・・・押えばね、１３・・・・・・
ホットランナ−ノズル、１４・旧・・空間部、１６・・
印・溶融樹脂、１６・・・・・・成形品、１６ａ・・・
・・・ボス、１７・・・・・・エジェクタービン。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第３
図
、８＃″″５
く晶と・
第４図
第５図1; FIG. 1 is a sectional view of the reel part of the conventional tape cassette; FIG. 2 is a plan view of the upper half of the conventional tape cassette; FIG. 3 is a sectional view of the same main part; FIG. 6 is a cross-sectional view of the mold in the open state, FIG. 6 is a cross-sectional view of the same mold in the closed state, and FIG. 6 is a cross-sectional view of page 6 of the molded product. 9... Movable side template, 9a... Guide hole, 9b... Decompression hole, 9C... Recessed part,
9d...Concavity, 1°...Fixed side template,
10a...Gate, 11...Film sheet, 12...Press, 13...
Hot runner nozzle, 14. Old space, 16.
Mark: Molten resin, 16... Molded product, 16a...
...Boss, 17...Eject turbine. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure, 8#''''5 Kushuto・Figure 4Figure 5
Claims (1)
ばね性を有し、彎曲外側部に分離可能な樹脂フィルムシ
ートを設け、かつ上ハーフに固定される穴部を有した部
材を挿入する工程と、部材を挿入した後、成形金型内に
樹脂を流出させて上ハーフを形成する工程と、樹脂形後
、樹脂フィルムシートと前記部材とを分離する工程とか
らなるテープカセット用板ばねのインサート射出成形法
。A member is inserted into the mold for the upper half that constitutes the upper case, which has an arcuate shape and has spring properties, has a separable resin film sheet on the outside of the curve, and has a hole to be fixed to the upper half. A plate for tape cassettes comprising the steps of: inserting the member, causing resin to flow into the mold to form the upper half; and separating the resin film sheet from the member after resin molding. Spring insert injection molding method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57217209A JPS59106944A (en) | 1982-12-10 | 1982-12-10 | Method for insert injection molding of leaf spring for tape cassette |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57217209A JPS59106944A (en) | 1982-12-10 | 1982-12-10 | Method for insert injection molding of leaf spring for tape cassette |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59106944A true JPS59106944A (en) | 1984-06-20 |
| JPH0332450B2 JPH0332450B2 (en) | 1991-05-13 |
Family
ID=16700572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57217209A Granted JPS59106944A (en) | 1982-12-10 | 1982-12-10 | Method for insert injection molding of leaf spring for tape cassette |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59106944A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6929771B1 (en) * | 2000-07-31 | 2005-08-16 | High Voltage Graphics, Inc. | Method of decorating a molded article |
| US7338697B2 (en) | 2000-07-24 | 2008-03-04 | High Voltage Graphics, Inc. | Co-molded direct flock and flock transfer and methods of making same |
| US7393576B2 (en) | 2004-01-16 | 2008-07-01 | High Voltage Graphics, Inc. | Process for printing and molding a flocked article |
| US7465485B2 (en) | 2003-12-23 | 2008-12-16 | High Voltage Graphics, Inc. | Process for dimensionalizing flocked articles or wear, wash and abrasion resistant flocked articles |
| WO2017191727A1 (en) | 2016-05-02 | 2017-11-09 | オムロン株式会社 | Leaf spring fixing structure, electrical contact structure, and method for manufacturing these |
-
1982
- 1982-12-10 JP JP57217209A patent/JPS59106944A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7338697B2 (en) | 2000-07-24 | 2008-03-04 | High Voltage Graphics, Inc. | Co-molded direct flock and flock transfer and methods of making same |
| US6929771B1 (en) * | 2000-07-31 | 2005-08-16 | High Voltage Graphics, Inc. | Method of decorating a molded article |
| US7465485B2 (en) | 2003-12-23 | 2008-12-16 | High Voltage Graphics, Inc. | Process for dimensionalizing flocked articles or wear, wash and abrasion resistant flocked articles |
| US7393576B2 (en) | 2004-01-16 | 2008-07-01 | High Voltage Graphics, Inc. | Process for printing and molding a flocked article |
| WO2017191727A1 (en) | 2016-05-02 | 2017-11-09 | オムロン株式会社 | Leaf spring fixing structure, electrical contact structure, and method for manufacturing these |
| KR20180033265A (en) | 2016-05-02 | 2018-04-02 | 오므론 가부시키가이샤 | Fixing structure of leaf spring, electrical contact structure and manufacturing method thereof |
| US10260587B2 (en) | 2016-05-02 | 2019-04-16 | Omron Corporation | Leaf spring fixing structure, electrical contact structure, and method for manufacturing these |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0332450B2 (en) | 1991-05-13 |
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