JPS598175A - Production of tape reel for magnetic tape cartridge - Google Patents
Production of tape reel for magnetic tape cartridgeInfo
- Publication number
- JPS598175A JPS598175A JP11703082A JP11703082A JPS598175A JP S598175 A JPS598175 A JP S598175A JP 11703082 A JP11703082 A JP 11703082A JP 11703082 A JP11703082 A JP 11703082A JP S598175 A JPS598175 A JP S598175A
- Authority
- JP
- Japan
- Prior art keywords
- hub
- upper mold
- mold
- langes
- magnetic tape
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 10
- 239000000057 synthetic resin Substances 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims abstract description 3
- 239000007924 injection Substances 0.000 claims abstract description 3
- 238000000465 moulding Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/037—Single reels or spools
-
- 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】
本発明は磁気テープカートリッジ用テープリールの製造
方法に係り、・特にチーブリールの下７ランジとハブの
一体成形方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a tape reel for a magnetic tape cartridge, and particularly to a method for integrally molding a lower 7 lange and a hub of a chip reel.
磁気テープカートリッジ用テーグリールは第１図に示す
ように下７ランジ１と、下７ランジ１に一体に突出され
たハブ２と、ハブ２に熱融着等によって取付けられた上
７ランジ３とから成り、この製造に際して、下フランジ
１とハブ２とは金型の湯路に合成樹脂を高圧射出するこ
とによって一体に成形され°る。As shown in Figure 1, the tag reel for magnetic tape cartridges consists of a lower 7 lange 1, a hub 2 integrally projected from the lower 7 lange 1, and an upper 7 lange 3 attached to the hub 2 by heat fusion or the like. In this manufacturing process, the lower flange 1 and the hub 2 are integrally molded by high-pressure injection of synthetic resin into a mold channel.
第２図および第３図は前述の一体成形の従来例を示すも
ので、第２図は下７ランジ１とハブ２の一体成形方法を
示す要部拡大縦断面図（第３図の■−■線断面図）、第
３図は第２図のＩ−Ｉｍに沿った横断面図である。2 and 3 show a conventional example of the above-mentioned integral molding, and FIG. 2 is an enlarged longitudinal cross-sectional view of the main part showing the method of integrally molding the lower 7 langes 1 and the hub 2 (■-- 3 is a cross-sectional view taken along line I-Im in FIG. 2.
図においてハブ２は磁気テープが巻回される外筒部４に
複数のリブ５で連結される内筒部６を有し、内筒部６に
は下７ランジ側に開口しかつ記録再生装置の駆動軸（図
示せず）′ｆｒ：挿入するための駆動軸挿入四部１が形
成され、駆動軸押入四部７の周面には円周方向に所定の
間隔を置き半径方向内方に突出して駆動軸の爪（図示せ
ず）と係合するための駆動力伝達用の係止突条８が複数
設けられている。外筒部４ど内筒部６との間にはリプ５
を挾んで複数の略半月状の空間溝部９が形成されている
。下７ランジ１は外筒部５と内筒部６の下部に連結され
半径方向外方に延びている。１０ｔｉ内筒部６の上面に
設けた中央突起部である。In the figure, the hub 2 has an inner cylinder part 6 connected by a plurality of ribs 5 to an outer cylinder part 4 around which a magnetic tape is wound. Drive shaft (not shown)'fr: A drive shaft insertion portion 1 for insertion is formed, and on the circumferential surface of the drive shaft insertion portion 7 are provided a drive shaft that protrudes radially inward at a predetermined interval in the circumferential direction. A plurality of locking protrusions 8 for transmitting driving force are provided to engage with pawls (not shown) of the drive shaft. There is a lip 5 between the outer cylinder part 4 and the inner cylinder part 6.
A plurality of substantially half-moon-shaped space grooves 9 are formed between the two. The lower 7 flange 1 is connected to the lower portions of the outer cylinder part 5 and the inner cylinder part 6 and extends radially outward. This is a central protrusion provided on the upper surface of the 10ti inner cylinder portion 6.
上記のような形状の下７ランジ１とハブ２を一体に成形
するため上金型１１お工び下金型１２が用いられる。第
２図り例では上金型１１は下７ランジ１の上面部および
外筒部４の外周部に当接する略リング状の上金型１１Ａ
１外ｍ部４の上面部と前記複数の略半月状の空間溝部９
内に延びる略リング状の上金型１１Ｂおよび内筒部６の
上面部に当接する略円柱状の上金型１１Ｃとから成って
いる。また下金型１２は下７ランジ１り下面部と当接す
る略リング状の下金型１２Ａ１下７ランジ１の凹凸部に
当接する略リング状の下金型１２Ｂおよび内筒部６の駆
動軸挿入四部に当接する略円柱状の下金型１２Ｃとから
成っている。An upper mold 11 and a lower mold 12 are used to integrally mold the lower flange 1 and the hub 2 having the above-described shape. In the second drawing example, the upper mold 11 is a substantially ring-shaped upper mold 11A that comes into contact with the upper surface of the lower 7 flange 1 and the outer periphery of the outer cylinder part 4.
1 the upper surface part of the outer m part 4 and the plurality of substantially half-moon-shaped space grooves 9
It consists of a substantially ring-shaped upper mold 11B that extends inward and a substantially cylindrical upper mold 11C that abuts the upper surface of the inner cylindrical portion 6. The lower mold 12 includes a substantially ring-shaped lower mold 12A that contacts the bottom surface of the lower 7 flange 1, a substantially ring-shaped lower mold 12B that contacts the uneven portion of the lower 7 flange 1, and a drive shaft of the inner cylinder portion 6. It consists of a substantially cylindrical lower mold 12C that abuts the four insertion parts.
したがって、下７ランジ１とへプ２を一体成形するに当
り、上金型１１と下金型１２り間に上記Ｑ）下７ランジ
１とハブ２と同様の形状Ｃ’） １７４路が形成されて
いる。下金型１２Ｃにはそり略中央部に合成樹脂を高圧
射出するための湯口１３が設けられ、湯口から射出され
た合成樹脂は第２図の矢印に示すように１内筒部６′ｆ
：通って外筒部４おＬび下７ラング部に流れて行き、下
７ランジ１とハブ２が一体に成形される。Therefore, when integrally molding the lower 7 langes 1 and the hub 2, 174 paths are formed between the upper mold 11 and the lower mold 12 in the same shape as the above Q) lower 7 langes 1 and the hub 2. has been done. The lower mold 12C is provided with a sprue 13 for injecting synthetic resin at high pressure approximately at the center of the sled, and the synthetic resin injected from the sprue flows into the inner cylindrical portion 6'f as shown by the arrow in FIG.
: It flows through the outer cylindrical part 4L and the lower 7 lang parts, and the lower 7 langes 1 and the hub 2 are integrally molded.
ところで、第２図および第３図に示す従来の成形方法に
おいては、湯口から射出された合成樹脂は内筒部６上部
の湯路を；Ｈｆ１つて略半月状り空間溜部９内を−Ｆ方
に延（メる上金型１１Ｂり基部に直角に当る。上金型１
１Ｂの空間溝部９に延びる部分は第２図に示すようにそ
り厚みが非常に薄く、特に小形のテープリールでは１ミ
リメ一タ前後であるため強度的に弱く、射出された合成
樹脂Ｑ）流れＶノ圧力によって再々折損する欠点を有し
ている。By the way, in the conventional molding method shown in FIGS. 2 and 3, the synthetic resin injected from the sprue passes through the sprue at the top of the inner cylindrical portion 6; The upper mold 11B hits the base at a right angle.
As shown in Fig. 2, the part extending to the space groove 9 of 1B has a very thin warp thickness, especially in the case of a small tape reel, which is around 1 mm, so the strength is weak, and the injected synthetic resin Q) Flow It has the disadvantage of repeatedly breaking due to V pressure.
本発明は上記従来の欠点に鑑み、上金型り前記略半月状
り空間溝部内に延ひる部分が強度的に強（折損などの起
こらない磁気テープカートリッジ用テーグリールの製造
方法を提供することを目的とする。In view of the above-mentioned conventional drawbacks, the present invention aims to provide a method for manufacturing a tag reel for a magnetic tape cartridge in which the portion of the upper mold extending into the approximately half-moon-shaped space groove is strong (and does not break or break). purpose.
こり目的を達成するための本発明は、略半月状り空間溝
部に延びる上金型の基部にリプを設けた上金型を用いて
下７ランジとハブとを一体に成形することを特徴とする
。To achieve this objective, the present invention is characterized in that the lower 7 langes and the hub are integrally molded using an upper mold in which a lip is provided at the base of the upper mold extending into the approximately half-moon-shaped space groove. do.
以下第４図乃至第６図を用いて本発明り一実施例′ｆ：
説明する。第４図は下７ランシとハブの一体成形方法を
示す要部拡大紹脚（面図（第５図の■−■線断面図）、
第５図は第４図の１し１線に沿つ几横断面図、第６図は
第４図および第５図り成形方法によって一体成形された
下７ランジとハブの斜視図である。各図において第１図
乃至第３図と同符号のものは同一部分または相当する部
分を示す。An embodiment of the present invention'f using FIGS. 4 to 6 below:
explain. Figure 4 shows an enlarged view of the main parts showing the method of integrally molding the lower 7 runci and the hub.
5 is a cross-sectional view of the box along line 1-1 in FIG. 4, and FIG. 6 is a perspective view of the lower 7 langes and the hub integrally molded by the molding method shown in FIGS. 4 and 5. In each figure, the same reference numerals as in FIGS. 1 to 3 indicate the same or corresponding parts.
外筒部４と内筒部６り間の略半月状り空間溝部９内に延
びる上金型１１Ｂの基部り内筒部６側にはテーバ状の補
強用リブ１４が設けられる。A tapered reinforcing rib 14 is provided on the inner cylinder part 6 side of the base of the upper mold 11B that extends into the substantially half-moon-shaped space groove 9 between the outer cylinder part 4 and the inner cylinder part 6.
このリブ１４を設けることによって上金型１１Ｂの空間
溝部９に延びる部分の基部に射出された合成樹脂の流れ
が直角に当っても十分な強度を付与することができる。By providing this rib 14, sufficient strength can be imparted even if the flow of the injected synthetic resin hits the base of the portion of the upper mold 11B extending into the space groove 9 at right angles.
第６図は前記実施例により一体に成形された下７ランジ
１とハブ２を示すもので、上金型１１Ｂに設けたリブ１
４υノ部分が溝部１５として内筒６の外周部に表わされ
る。FIG. 6 shows the lower 7 flange 1 and hub 2 integrally molded according to the above embodiment, and shows the rib 1 provided on the upper mold 11B.
The 4υ portion is represented as a groove 15 on the outer circumference of the inner cylinder 6.
第７図は本発明の他の実施例を示すもので、下７ランジ
とハブの一体成形方法の要部拡大縦断面図である。FIG. 7 shows another embodiment of the present invention, and is an enlarged longitudinal cross-sectional view of a main part of a method of integrally molding the lower 7 langes and the hub.
この実施例でけ外筒部４と内筒部６の間の略半月状の空
間溝部９内に延びる一Ｆ金型１１Ｂの基部の外筒４側に
テーバ状の補強用リブ１４′か設けられる。In this embodiment, a tapered reinforcing rib 14' is provided on the outer cylinder 4 side of the base of the one-F mold 11B that extends into the approximately half-moon-shaped space groove 9 between the outer cylinder part 4 and the inner cylinder part 6. It will be done.
この実施例でも第３図および第４図の実施例と同等の効
果を奏する細土金型１１Ｃの形状を変える必要がないた
め金型の製作が簡略化されるという効果がある。This embodiment also has the effect of simplifying the production of the mold because there is no need to change the shape of the fine clay mold 11C, which produces the same effect as the embodiments shown in FIGS. 3 and 4.
以上説明した実施例では上金型１１および下金型１２を
それぞれ３つの金型に分割した例を示したが、必ずしも
３分割する必要はな（，２分割または一体の金型でも良
い。In the embodiment described above, an example was shown in which the upper mold 11 and the lower mold 12 were each divided into three molds, but it is not necessarily necessary to divide them into three (the molds may be divided into two or may be a single mold).
また、上記実ＭＭ例では合成樹脂の射出する湯口を下金
型１２に設けた例を示したか、上金型に湯口を設けても
良（、成形されるハブの上部中央近傍の上金型、下金型
のいずれの位ｔｆＫ設けても良い。In addition, in the above actual MM example, a sprue for injecting synthetic resin is provided in the lower mold 12, but it is also possible to provide a sprue in the upper mold (or in the upper mold near the center of the upper part of the hub to be molded). , the tfK may be provided anywhere in the lower mold.
以上説明した本発明によれは、テープリールの下７ラン
ジとハブとを一体に成形するに際し、ハブの外筒部と内
筒部の間の複数のリプを挾んだ複数の略半月状の空間溝
部に挿入される上金型の非常に薄く強度的に弱い部分を
十分に補強することができ、その部分の折損を招く恐れ
がなくなるので１テープリールの製造工程を止めること
がなく生産効率の向上に著しく貢献するものである。According to the present invention described above, when the lower 7 langes of the tape reel and the hub are integrally molded, a plurality of substantially half-moon-shaped parts are formed between the plurality of lips between the outer cylinder part and the inner cylinder part of the hub. The extremely thin and weak part of the upper mold that is inserted into the space groove can be sufficiently reinforced, and there is no risk of that part breaking, increasing production efficiency without stopping the manufacturing process of one tape reel. This will significantly contribute to the improvement of
第１図は磁気テープカートリッジ用テープリールの側面
図、第２図は従来の下フランジと７１ブの一体成形方法
を示す要部拡大縦断面図（第３図の■−■線断面図）、
第３図は第２図のＩ−Ｉ線に沿つｔ横断面図、第４図は
本発明の実施例に係る下７ランジとハブの一体成形方法
を示す要部拡大縦断面図（第５図のｉｖ −＋ｖ線断面
図）、第５図は第４図のｌ［−Ｉ線に沿った横断面図、
第６図は第４図乃至第５図の実施例によって成形された
下７ランジとハブの斜視図、第７図は本発明の他の実施
例忙係る下７ランジとハブの一体成形方法を示す要部拡
大縦断面図である。
１・・・・・・下７ランジ、２・・・・・・ハブ、３・
・・・・・上フランジ、４・・・・・・外筒部、５・・
・・・・リブ、６・・・・・・内筒部、７・・・・・・
駆動軸挿入凹部、８・・・・・・係止突条、９・・・・
・・略半月状の空間溝部、１１・・・・・・上金型、１
２・・・・・・下金型、１３・・・・・・湯ＩＴＩ、１
４．１４’・・・・・補強用リブ
第１ 区
第２図
第３１￥Ｉ
第４図
第５図Fig. 1 is a side view of a tape reel for a magnetic tape cartridge, Fig. 2 is an enlarged vertical cross-sectional view of main parts showing a conventional method of integrally molding the lower flange and 71b (cross-sectional view taken along the line ■-■ in Fig. 3),
FIG. 3 is a cross-sectional view taken along the line I-I in FIG. 2, and FIG. 5), FIG. 5 is a cross-sectional view taken along the l [-I line in FIG. 4,
Fig. 6 is a perspective view of the lower 7 langes and the hub formed according to the embodiment shown in Figs. FIG. 1...Lower 7 lunges, 2...Hub, 3.
...Top flange, 4...Outer cylinder part, 5...
...Rib, 6...Inner cylinder part, 7...
Drive shaft insertion recess, 8... Locking protrusion, 9...
...Approximately half-moon-shaped space groove, 11... Upper mold, 1
2...Lower mold, 13...Hot water ITI, 1
4.14'・・・Reinforcement rib No. 1 Section No. 2 Fig. 31￥I Fig. 4 Fig. 5
Claims (1)
このハブに取付けられた上７ランジとから成り、こりハ
ブは磁気テープが巻回される外筒部と外筒部Ｋ１１ｌ数
のリブで連結されかつ下７ランジ側に開口した駆動軸挿
入四部を有する円筒部とを備えると共に、こり内筒部の
駆動軸挿入四部周面には円周方向に間隔を置き半径方向
内方に突出して駆動軸の爪と係合する駆動力伝達用の係
止突状が設けられ、ｆｌｌｉｌｔ：外筒部と内筒部の間
のリプな挾んだ複数の略半月状の空間溝部を形成した磁
気テープカートリッジ用テーグリールを製造するに際し
、前記下７ランジの上面部およびハブの外筒部と内筒部
の上面部に当接しかつ前記略半月状の空間溝部内に延び
る上金型と前記下７ランジの下面部およびハブの内筒部
の駆動軸挿入凹部に当接する下金型とを用い、上金型お
よび下金型のどちらか一方に設けた湯口エリ合成樹脂を
高圧射出して下７ランジとハブとを一体に成形する磁気
テープカー） ＩＪツジ用テープリールの製造方法にお
いて１前記略半月状の空間溝部に延びる止金型の一部に
補強用リブを設けた上金型を用いて下７ランジとハブ“
とを一体に成形することを特徴とする磁気テープカート
リッジ用テープリールの製造方法。The lower 7 langes and the hub integrally protruding from the lower flange,
This hub consists of an upper 7 langes attached to the hub, and the stiff hub has an outer cylindrical part around which the magnetic tape is wound, and an outer cylindrical part connected by K11l number of ribs, and has four drive shaft insertion parts opened on the lower 7 langes side. and a cylindrical part having a cylindrical part, and locks for transmitting driving force that protrude radially inward at intervals in the circumferential direction on the circumferential surface of the four drive shaft insertion parts of the inner cylindrical part and engage with the pawls of the drive shaft. When manufacturing a tag reel for a magnetic tape cartridge that is provided with a protrusion and has a plurality of approximately half-moon-shaped space grooves sandwiched between an outer cylinder part and an inner cylinder part, the upper surface of the lower seven flange is The upper mold, the lower surface of the lower 7 flange, and the drive shaft insertion recess in the inner cylinder of the hub contact the upper surfaces of the outer cylinder and the inner cylinder of the hub and extend into the approximately half-moon-shaped space groove. A magnetic tape car (IJ Tsuji) in which the lower 7 langes and the hub are integrally molded by high-pressure injection of synthetic resin from the sprue provided in either the upper mold or the lower mold using a lower mold that comes into contact with the lower mold. In the method for manufacturing a tape reel for use in 1. using an upper mold in which a reinforcing rib is provided on a part of the retaining mold extending in the approximately half-moon-shaped space groove, the lower 7 langes and the hub "
A method of manufacturing a tape reel for a magnetic tape cartridge, characterized by integrally molding the tape reel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11703082A JPS598175A (en) | 1982-07-07 | 1982-07-07 | Production of tape reel for magnetic tape cartridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11703082A JPS598175A (en) | 1982-07-07 | 1982-07-07 | Production of tape reel for magnetic tape cartridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS598175A true JPS598175A (en) | 1984-01-17 |
Family
ID=14701705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11703082A Pending JPS598175A (en) | 1982-07-07 | 1982-07-07 | Production of tape reel for magnetic tape cartridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS598175A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61255572A (en) * | 1985-05-08 | 1986-11-13 | Takahata Seiko Kk | Production of reel hub of tape reel |
| EP0247821A2 (en) * | 1986-05-26 | 1987-12-02 | Polyplastics Co. Ltd. | Method of manufacturing tape reel |
| EP0247822A2 (en) * | 1986-05-26 | 1987-12-02 | Polyplastics Co. Ltd. | Method of manufacturing tape reel |
| JPS63168678U (en) * | 1987-04-23 | 1988-11-02 | ||
| JP2010099866A (en) * | 2008-10-21 | 2010-05-06 | Hitachi Maxell Ltd | Method of molding integrated member and upper flange, mold for molding integrated member and upper flange, integrated member, upper flange, tape reel, and tape cartridge |
| JP2015074033A (en) * | 2013-10-04 | 2015-04-20 | 富士紡ホールディングス株式会社 | Drill ring, and manufacturing method thereof |
-
1982
- 1982-07-07 JP JP11703082A patent/JPS598175A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61255572A (en) * | 1985-05-08 | 1986-11-13 | Takahata Seiko Kk | Production of reel hub of tape reel |
| EP0247821A2 (en) * | 1986-05-26 | 1987-12-02 | Polyplastics Co. Ltd. | Method of manufacturing tape reel |
| EP0247822A2 (en) * | 1986-05-26 | 1987-12-02 | Polyplastics Co. Ltd. | Method of manufacturing tape reel |
| JPS63168678U (en) * | 1987-04-23 | 1988-11-02 | ||
| JPH0538456Y2 (en) * | 1987-04-23 | 1993-09-29 | ||
| JP2010099866A (en) * | 2008-10-21 | 2010-05-06 | Hitachi Maxell Ltd | Method of molding integrated member and upper flange, mold for molding integrated member and upper flange, integrated member, upper flange, tape reel, and tape cartridge |
| JP2015074033A (en) * | 2013-10-04 | 2015-04-20 | 富士紡ホールディングス株式会社 | Drill ring, and manufacturing method thereof |
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