JP2513227B2 - Two-color molding die device - Google Patents

Two-color molding die device

Info

Publication number
JP2513227B2
JP2513227B2 JP62107348A JP10734887A JP2513227B2 JP 2513227 B2 JP2513227 B2 JP 2513227B2 JP 62107348 A JP62107348 A JP 62107348A JP 10734887 A JP10734887 A JP 10734887A JP 2513227 B2 JP2513227 B2 JP 2513227B2
Authority
JP
Japan
Prior art keywords
resin
molding
color
cavity
cassette half
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
Application number
JP62107348A
Other languages
Japanese (ja)
Other versions
JPS63270113A (en
Inventor
政和 田原
敏雄 打木
一樹 仲丸
信義 佐々木
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP62107348A priority Critical patent/JP2513227B2/en
Priority to GB8809761A priority patent/GB2203984B/en
Priority to KR1019880004828A priority patent/KR880012332A/en
Priority to FR8805823A priority patent/FR2614574A1/en
Priority to IT47897/88A priority patent/IT1219561B/en
Publication of JPS63270113A publication Critical patent/JPS63270113A/en
Application granted granted Critical
Publication of JP2513227B2 publication Critical patent/JP2513227B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0025—Opaque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0026—Transparent

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics 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〕 本発明は二色成形に用いる金型装置に関し、特に不透
明樹脂と透明樹脂の二色成形に用いて好適なものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mold device used for two-color molding, and is particularly suitable for two-color molding of an opaque resin and a transparent resin.

〔発明の概要〕[Outline of Invention]

本発明は二色成形に用いる金型装置において、第一の
樹脂を成形するキヤビテイを形成する金型に、第二の樹
脂を成形するキヤビテイに近接した位置に段状部を形成
することにより、この段状部によつて第一の樹脂成形側
に対する第二の樹脂の射出圧力を受け、成形品における
第一の樹脂と第二の樹脂の接合部に変形が生じないよう
にしたものである。The present invention, in a mold device used for two-color molding, in a mold forming a cavity for molding a first resin, by forming a stepped portion at a position close to the cavity for molding a second resin, The stepped portion receives the injection pressure of the second resin to the first resin molding side, and prevents the joint portion of the first resin and the second resin in the molded product from being deformed. .

〔従来の技術〕[Conventional technology]

樹脂成形品において、異なる種類の樹脂を一体に成形
する際には、先ず金型内に第一の樹脂を射出注入し、そ
の後第二の樹脂を射出注入してこれら第一の樹脂と第二
の樹脂を一体に成形する、いわゆる二色成形法が広く実
施されている。When molding different types of resin into a resin-molded product, first inject and inject the first resin into the mold, then inject and inject the second resin into the first resin and the second resin. A so-called two-color molding method, in which the resin is integrally molded, is widely practiced.

この二色成形法を用いて成形されるものの一例とし
て、例えば本出願人が先に提案した「実開昭60−60083
号公報」に記載されるテープカセツトについて第７図〜
第10図を参照して説明する。As an example of what is molded by using this two-color molding method, for example, “Saikaisho 60-60083” previously proposed by the applicant of the present invention is proposed.
7 of the tape cassette described in Japanese Patent Publication No.
This will be described with reference to FIG.

第７図において（１）はカセツト匣体で、このカセツ
ト匣体（１）は上下一対のカセツトハーフ（２）を螺子
止め等によつて合体して構成されている。このカセツト
ハーフ（２）の本体部（2a）は、不透明な熱可塑性樹脂
例えばスチロール樹脂によつて形成されている。そし
て、このカセツトハーフ（２）の本体部（2a）の中央部
には透明な熱可塑性樹脂例えばスチロール樹脂により成
る透明窓部（2b）が形成されており、この窓部（2b）を
介してカセツト匣体（１）内に収納されている磁気テー
プ（３）を目視できるようになされている。In FIG. 7, (1) is a cassette casing, and this cassette casing (1) is constructed by combining a pair of upper and lower cassette halves (2) by screwing or the like. The body portion (2a) of the cassette half (2) is made of an opaque thermoplastic resin such as styrene resin. A transparent window portion (2b) made of a transparent thermoplastic resin such as styrene resin is formed in the center of the body portion (2a) of the cassette half (2), and the transparent window portion (2b) is formed through this window portion (2b). The magnetic tape (3) housed in the cassette housing (1) can be viewed.

このように不透明部と透明部とを一体に有するカセツ
トハーフ（２）を射出成形によつて製造する場合は、第
８図に示す如き二色成形金型（５）が用いられる。即
ち、この二色成形金型（５）は、上部固定金型（６）
と、下部固定金型（７）、及び可動金型（８）とより成
り、先ず同図Ａの如く可動金型（８）を前進させた状態
でカセツトハーフの本体部（2a）を成形するキヤビテイ
（９）を形成し、このキヤビテイ（９）に樹脂注入ゲー
ト（10）を介して第一の樹脂として不透明な樹脂を射出
注入してカセツトハーフ（２）の本体部（2a）を成形し
（一次成形）、その後同図Ｂの如く可動金型（８）を後
退移動させることにより透明窓部（2b）を成形するキヤ
ビテイ（11）を形成し、このキヤビテイ（11）に樹脂注
入ゲート（12）を介して第二の樹脂として透明な樹脂を
射出注入して透明窓部（2b）を成形し（二次成形）、こ
の二次成形の際の樹脂の熱と射出圧力とによりカセツト
ハーフ（２）の本体部（2a）と透明窓部（2b）とを一体
に成形している。When the cassette half (2) integrally having the opaque portion and the transparent portion is manufactured by injection molding, a two-color molding die (5) as shown in FIG. 8 is used. That is, the two-color molding die (5) is the upper fixed die (6).
And a lower fixed mold (7) and a movable mold (8). First, as shown in FIG. A, the movable mold (8) is advanced to mold the body part (2a) of the cassette half. A cavity (9) is formed, and an opaque resin as a first resin is injected and injected into the cavity (9) through a resin injection gate (10) to mold the body part (2a) of the cassette half (2). (Primary molding), and thereafter, the movable mold (8) is moved backward as shown in FIG. 9B to form a cavity (11) for molding the transparent window portion (2b), and a resin injection gate (11) is formed in this cavity (11). The transparent window portion (2b) is molded by injecting a transparent resin as the second resin through (12) (secondary molding), and the cassette half is heated by the heat and injection pressure of the resin at the time of this secondary molding. The main body portion (2a) of (2) and the transparent window portion (2b) are integrally formed.

〔発明が解決しようとする問題点〕[Problems to be solved by the invention]

しかしながら、従来のこの二色成形においては、第二
の樹脂の射出の際に、まだ第一の樹脂が完全に固化して
いないことにより、この第二の樹脂の射出圧力ａによつ
て第一の樹脂が押圧されて変形し、このため第一の樹脂
と第二の樹脂との接合部、即ち第10図に示す如くカセツ
トハーフ（２）の透明窓部（2b）の前後縁部に歪みが生
じ、外観的に好ましくない不具合がある。However, in this conventional two-color molding, when the second resin is injected, the first resin is not yet completely solidified, so that the injection pressure a of the second resin causes This resin is pressed and deformed, and as a result, the joint between the first resin and the second resin is distorted at the front and rear edges of the transparent window (2b) of the cassette half (2) as shown in FIG. Occurs, and there is a disadvantage that the appearance is not preferable.

本発明は斯かる点に鑑みてなされたもので、二色成形
金型装置に新規の改良を加え、第一の樹脂と第二の樹脂
の接合部に変形のない成形品を得ることを目的とする。The present invention has been made in view of these points, and an object thereof is to provide a new improvement in a two-color molding die device to obtain a molded product having no deformation in a joint portion between a first resin and a second resin. And

〔問題点を解決するための手段〕[Means for solving problems]

本発明は上述の目的を達成するために、第一の樹脂、
即ち一色目の樹脂を射出注入し続いて第二の樹脂、即ち
第二色目の樹脂を射出注入して成形を行う二色成形金型
装置において、一色目の樹脂を成形するキヤビテイを形
成する金型に、二色目の樹脂を成形するキヤビテイに近
接した位置に段状部としての凸状リブを設けて成るもの
である。In order to achieve the above-mentioned object, the present invention provides a first resin,
That is, in a two-color molding die device in which the resin of the first color is injected and then the second resin, that is, the resin of the second color is injected and molded, a metal forming a cavity for molding the resin of the first color. The mold is provided with a convex rib as a stepped portion at a position close to the cavity for molding the resin of the second color.

〔作用〕[Action]

このように凸状リブを設けたことにより、二色目の樹
脂を射出する際にその射出圧力が一色目の樹脂成形側に
対して凸状リブによつて受けられる状態となり、このた
め一色目の樹脂と二色目の樹脂の接合部に変形が生じる
ことはなく、外観性の優れた成形品を提供することがで
きる。By providing the convex ribs in this way, when the second color resin is injected, the injection pressure is received by the convex ribs on the resin molding side of the first color, and therefore the first color It is possible to provide a molded article having excellent appearance without causing deformation in the joint between the resin and the resin of the second color.

〔実施例〕〔Example〕

以下、第１図〜第６図を参照しながら本発明の二色成
形金型の実施例について説明するに、上述した第７図〜
第10図の従来例と対応する部分には同一符号を付しその
説明は省略する。Hereinafter, in order to explain the embodiment of the two-color molding die of the present invention with reference to FIGS.
The parts corresponding to those of the conventional example in FIG. 10 are designated by the same reference numerals and the description thereof will be omitted.

尚、本例においても、上述の従来例と同様にテープカ
セツトのカセツトハーフ（２）を成形する場合について
説明する。Also in this example, the case of molding the cassette half (2) of the tape cassette will be described as in the above-mentioned conventional example.

本発明の二色成形金型（５）は第一の樹脂、即ち一色
目の樹脂を成形するキヤビテイを成形する金型に、第二
の樹脂即ち二色目の樹脂を成形するキヤビテイに近接し
た位置に変形防止用の段状部として凸状リブを設けて成
るものである。即ち、本例では第１図に示す如くカセツ
トハーフの本体部（2a）を成形するキヤビテイ（９）を
形成する下部固定金型（７）に、透明窓部（2b）を成形
するキヤビテイ（11）に近接した位置において凸状リブ
（13）を突設してある。この凸状リブ（13）は、方形状
の断面形状をなし、本例の金型（５）によつて成形され
るカセツトハーフの透明窓部（2b）の前後縁部に沿うよ
うに所定長さで複数箇所（本例では８ケ所）に設けられ
ている。The two-color molding die (5) of the present invention is located at a position close to the die for molding the first resin, that is, the cavity for molding the resin of the first color, and the cavity for molding the second resin, that is, the resin of the second color. In addition, a convex rib is provided as a stepped portion for preventing deformation. That is, in this example, as shown in FIG. 1, a lower fixed mold (7) forming a cavity (9) for molding the body portion (2a) of the cassette half, a cavity (11) for molding the transparent window portion (2b). ), A convex rib (13) is provided so as to project. The convex ribs (13) have a rectangular cross section and have a predetermined length along the front and rear edges of the transparent window (2b) of the cassette half molded by the mold (5) of this example. Now, it is provided at a plurality of locations (eight locations in this example).

そして、先ず同図Ａの如く可動金型（８）を前進させ
て、透明窓部（2b）を成形するキヤビテイ（11）を塞い
だ状態で一色目の樹脂としての不透明な樹脂を樹脂注入
ゲート（10）を介してキヤビテイ（９）に射出注入して
カセツトハーフの本体部（2a）を成形し、その後続いて
同図Ｂの如く可動金型（８）を後退移動させて透明窓部
（2a）を成形するキヤビテイ（11）を形成し、このキヤ
ビテイ（11）にゲート（12）を介して二色目の樹脂とし
ての透明な樹脂を射出注入して透明窓部（2b）を成形す
る。このとき、カセツトハーフの本体部（2a）を形成す
る一色目の樹脂には、二色目の樹脂の射出圧力ａが加わ
ることになるが、この射出圧力ａは凸状リブ（13）によ
つて受けられる状態となり（第２図参照）、このため一
色目の樹脂と二色目の樹脂との接合部には殆ど変形が生
じることはなく、従つて成形されたカセツトハーフ
（２）は透明窓部（2a）の縁部が歪むことなく良好な外
観に仕上る。Then, first, as shown in FIG. A, the movable mold (8) is moved forward to close the cavity (11) for molding the transparent window (2b) and the opaque resin as the first color resin is injected into the resin injection gate. The main body portion (2a) of the cassette half is molded by injecting it into the cavity (9) through the (10), and then the movable mold (8) is moved backward as shown in FIG. A cavity (11) for molding 2a) is formed, and a transparent window portion (2b) is molded by injecting a transparent resin as a second color resin into the cavity (11) through a gate (12). At this time, the injection pressure a of the resin of the second color is applied to the resin of the first color forming the main body portion (2a) of the cassette half, and this injection pressure a is caused by the convex ribs (13). It is ready to be received (see Fig. 2), so that the joint between the first-color resin and the second-color resin is hardly deformed, and the cassette half (2) thus molded has a transparent window portion. A good appearance is obtained without the edge of (2a) being distorted.

そして、このようにしてカセツトハーフ（２）を成形
した後、上下の固定金型（６）と（７）を開いてカセツ
トハーフ（２）を取出すことにより、透明窓部（2a）を
一体に有するカセツトハーフ（２）の成形品が得られ
る。After molding the cassette half (2) in this manner, the upper and lower fixed molds (6) and (7) are opened to take out the cassette half (2), so that the transparent window portion (2a) is integrated. A molded product of the cassette half (2) is obtained.

尚、この成形されたカセツトハーフ（２）には、本体
部（2a）の裏面側に、凸状リブ（13）に対応した凹状の
跡部（14）が形成されることになるが、この凹状の跡部
（14）はカセツトハーフ（２）の裏面側に形成されるた
めに、テープカセツトの組立後の外観性には何ら問題と
なることはなく、また内部に収納されるテープに干渉す
ることはない。また、この凹状跡部（14）は、カセツト
ハーフの反りを防止するリブとして作用する効果もあ
る。In this molded cassette half (2), a concave mark (14) corresponding to the convex rib (13) is formed on the back surface side of the main body (2a). Since the mark part (14) of the tape cassette is formed on the back side of the cassette half (2), there is no problem in the appearance of the tape cassette after assembling, and it does not interfere with the tape stored inside. There is no. Further, the concave mark portion (14) also has an effect of acting as a rib for preventing the cassette half from warping.

以上の如く本例の二色成形金型（５）によれば、カセ
ツトハーフの本体部（2a）を成形するキヤビテイ（９）
を形成する下部固定金型（７）に、透明窓部（2b）を形
成する二色目の樹脂の射出圧力を受ける凸状リブ（13）
を設けたことにより、カセツトハーフ（２）の透明窓部
（2b）の縁部の変形を防止することができるので、カセ
ツトハーフ（２）の寸法精度が向上し、デザイン的イメ
ージを向上させることができ、また成形作業において二
色目の樹脂の射出圧力に細かい配慮を必要としないので
成形条件の範囲が広がり、従つて成形作業性が良好とな
る。しかも構成が極めて簡単であるため金型の製作コス
トは従来とさほど変わらず、実施が容易である等、種々
の実用的効果を有する。As described above, according to the two-color molding die (5) of this example, the cavity (9) for molding the body part (2a) of the cassette half is formed.
A convex rib (13) that receives the injection pressure of the second color resin that forms the transparent window (2b) in the lower fixed mold (7) that forms the
By providing the above, it is possible to prevent the edge portion of the transparent window portion (2b) of the cassette half (2) from being deformed, so that the dimensional accuracy of the cassette half (2) is improved and the design image is improved. In addition, since the injection pressure of the resin of the second color does not need to be carefully considered in the molding work, the range of molding conditions is widened, and therefore the molding workability is improved. Moreover, since the structure is extremely simple, the manufacturing cost of the mold is not so different from the conventional one, and it has various practical effects such as easy implementation.

尚、以上の第１図〜第３図の実施例においては、凸状
リブ（13）は断面方形状に形成してあるが、第４図に示
す如く凸状リブ（13）を断面三角形状に形成してもよ
い。この場合、凸状リブ（13）は二色目の樹脂の射出圧
力を受ける側を垂直面とし、他側を傾斜面とするように
形成する。この第４図の実施例の場合は、凸状リブ（1
3）の傾斜面部が抜き勾配として作用するので、成形後
カセツトハーフ（２）を金型（５）から取出し易いとい
う利点がある。In the embodiment shown in FIGS. 1 to 3, the convex rib (13) is formed to have a rectangular cross section, but as shown in FIG. 4, the convex rib (13) has a triangular cross section. You may form in. In this case, the convex rib (13) is formed so that the side receiving the injection pressure of the resin of the second color is the vertical surface and the other side is the inclined surface. In the case of the embodiment of FIG. 4, convex ribs (1
Since the inclined surface portion of 3) acts as a draft, there is an advantage that the cassette half (2) can be easily taken out from the mold (5) after molding.

また、第１図〜第３図の実施例においては、凸状リブ
（13）を所定長さで複数箇所に形成した場合について説
明したが、これに限ることなく金型（５）に前述した凸
状リブ（13）を連続した形状に形成してもよい。即ちこ
の金型（５）で成形されたカセツトハーフ（２）を第５
図及び第６図に示してあるが、このカセツトハーフ
（２）には金型（５）の連続凸状リブによる凹状跡部
（14）が連続して形成されることになる。Further, in the embodiment of FIGS. 1 to 3, the case where the convex ribs (13) are formed at a plurality of positions with a predetermined length has been described, but the present invention is not limited to this, and is described above in the mold (5). The convex rib (13) may be formed in a continuous shape. That is, the cassette half (2) formed by this mold (5) is
As shown in FIGS. 6 and 6, the cassette half (2) is continuously formed with a concave mark portion (14) by a continuous convex rib of the mold (5).

さらに、この凸状リブ（13）に代えて、例えば凸状ピ
ンを所定間隔で並設して変形防止用段状部としてもよ
い。Further, instead of the convex rib (13), for example, convex pins may be arranged in parallel at a predetermined interval to form a step portion for preventing deformation.

また、以上の説明では変形防止用段状部として凸状の
リブ及びピンを示したが、この段状部を凹状に形成する
こともできる。この場合は、凹状部に一色目の樹脂が充
填される状態となり、この凹状部内で一色目の樹脂成形
部は係止される状態になつて二色目の樹脂の射出圧力を
受けることになるので、上述の実施例の場合と同様にし
て一色目の樹脂と二色目の樹脂との間の変形が防止さ
れ、外観性の優れた成形品を得ることができる。Further, in the above description, a convex rib and a pin are shown as the step portion for preventing deformation, but the step portion may be formed in a concave shape. In this case, the concave portion is filled with the resin of the first color, and the resin molding portion of the first color is locked in the concave portion and receives the injection pressure of the resin of the second color. As in the case of the above-mentioned embodiment, the deformation between the resin of the first color and the resin of the second color is prevented, and a molded product having excellent appearance can be obtained.

尚、以上の実施例では、テープカセツトのカセツトハ
ーフ（２）の成形に本発明の二色成形金型を用いた例を
示したが、本発明の二色成形金型はテープカセツトに限
ることなく種々の樹脂成形品に適用できるものであるこ
とは勿論である。In the above examples, the two-color molding die of the present invention was used for molding the cassette half (2) of the tape cassette, but the two-color molding die of the present invention is not limited to the tape cassette. Of course, it can be applied to various resin molded products.

〔発明の効果〕〔The invention's effect〕

以上の如く本発明の二色成形金型装置は、第一の樹脂
を成形するキヤビテイを形成する金型に、第二の樹脂を
成形するキヤビテイに近接した位置に段状部を設けたこ
とにより、第二の樹脂の射出圧力がこの段状部で受けら
れる状態となるので、成形品における第一の樹脂と第二
の樹脂との接合部に変形が生じることはなく、このため
外観性の優れた成形品を得ることができ、特に実施例に
示した如き不透明樹脂と透明樹脂の二色成形に用いて効
果が大きいものである。As described above, the two-color molding die device of the present invention is provided with the stepped portion at a position close to the cavity for molding the second resin in the die for forming the cavity for molding the first resin. Since the injection pressure of the second resin is received by this stepped portion, no deformation occurs at the joint between the first resin and the second resin in the molded product, and therefore the appearance is improved. An excellent molded product can be obtained, and it is particularly effective when used for two-color molding of an opaque resin and a transparent resin as shown in the examples.

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

第１図は本発明の二色成形金型の断面図で、Ａは一次成
形を行つたときの状態、Ｂは二次成形を行うときの状
態、第２図は本発明の二色成形金型の要部の拡大断面
図、第３図は本発明の二色成形金型によつて成形された
カセツトハーフの内面図、第４図は凸状リブの他例を示
す要部の拡大断面図、第５図及び第６図は凸状リブのさ
らに他例を説明するカセツトハーフの内面図、第７図は
二色成形によつて製造されるテープカセツトを説明する
斜視図、第８図は従来の二色成形金型の断面図で、Ａは
一次成形を行つたときの状態、Ｂは二次成形を行うとき
の状態、第９図は従来の二色成形金型の要部の拡大断面
図、第10図は従来の二色成形金型によつて成形されたカ
セツトハーフの内面図である。 図中、（５）は二色成形金型、（６）は上部固定金型、
（７）は下部固定金型、（８）は可動金型、（９）（1
1）はキヤビテイ、（13）は凸状リブである。FIG. 1 is a sectional view of a two-color molding die of the present invention, where A is a state when primary molding is performed, B is a state when secondary molding is performed, and FIG. 2 is a two-color molding die of the present invention. FIG. 3 is an enlarged cross-sectional view of a main part of the mold, FIG. 3 is an inner view of a cassette half molded by the two-color molding die of the present invention, and FIG. 4 is an enlarged cross-sectional view of a main part showing another example of the convex rib. FIGS. 5, 5 and 6 are inner views of a cassette half for explaining still another example of the convex rib, FIG. 7 is a perspective view for explaining a tape cassette manufactured by two-color molding, and FIG. Is a sectional view of a conventional two-color molding die, A is a state when primary molding is performed, B is a state when secondary molding is performed, and FIG. 9 is a main part of a conventional two-color molding die. FIG. 10 is an enlarged sectional view, and FIG. 10 is an inner view of a cassette half molded by a conventional two-color molding die. In the figure, (5) is a two-color molding die, (6) is an upper fixed die,
(7) is a lower fixed mold, (8) is a movable mold, (9) (1
1) is the cavity and (13) is the convex rib.

フロントページの続き (72)発明者 佐々木 信義 東京都品川区北品川６丁目５番６号 ソ ニー・マグネ・プロダクツ株式会社内 (56)参考文献 特開 昭62−116122（ＪＰ，Ａ) 特開 昭57−179972（ＪＰ，Ａ) 特開 昭57−199636（ＪＰ，Ａ) 特開 昭58−9264（ＪＰ，Ａ)Front page continuation (72) Inventor Nobuyoshi Sasaki 6-5-6 Kitashinagawa, Shinagawa-ku, Tokyo Within Sony Magne Products Co., Ltd. (56) Reference JP-A-62-116122 (JP, A) JP-A-57-179972 (JP, A) JP-A-57-199636 (JP, A) JP-A-58-9264 (JP, A)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】第一の樹脂を注入し、続いて第二の樹脂を
注入して成形を行うようにした二色成形金型装置におい
て、 上記第一の樹脂を成形するキヤビテイを形成する金型
に、上記第二の樹脂を成形するキヤビテイに近接した位
置に段状部を設けて成る二色成形金型装置。1. A two-color molding die apparatus in which a first resin is injected and then a second resin is injected to perform molding, and a metal forming a cavity for molding the first resin. A two-color molding die apparatus in which a mold is provided with a stepped portion at a position close to the cavity for molding the second resin.
JP62107348A 1987-04-30 1987-04-30 Two-color molding die device Expired - Lifetime JP2513227B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP62107348A JP2513227B2 (en) 1987-04-30 1987-04-30 Two-color molding die device
GB8809761A GB2203984B (en) 1987-04-30 1988-04-25 Apparatus for double injection molding
KR1019880004828A KR880012332A (en) 1987-04-30 1988-04-28 2-color molding machine
FR8805823A FR2614574A1 (en) 1987-04-30 1988-04-29 DOUBLE INJECTION MOLDING DEVICE, IN PARTICULAR OF AN OPAQUE RESIN AND A TRANSPARENT RESIN
IT47897/88A IT1219561B (en) 1987-04-30 1988-04-29 DOUBLE INJECTION MOLDING DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62107348A JP2513227B2 (en) 1987-04-30 1987-04-30 Two-color molding die device

Publications (2)

Publication Number Publication Date
JPS63270113A JPS63270113A (en) 1988-11-08
JP2513227B2 true JP2513227B2 (en) 1996-07-03

Family

ID=14456777

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62107348A Expired - Lifetime JP2513227B2 (en) 1987-04-30 1987-04-30 Two-color molding die device

Country Status (5)

Country Link
JP (1) JP2513227B2 (en)
KR (1) KR880012332A (en)
FR (1) FR2614574A1 (en)
GB (1) GB2203984B (en)
IT (1) IT1219561B (en)

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Publication number Priority date Publication date Assignee Title
JP2815046B2 (en) * 1987-06-19 1998-10-27 ミノルタ株式会社 Molded member and method of joining the same
JPH0726089Y2 (en) * 1988-03-29 1995-06-14 三菱マテリアル株式会社 Multicolor mold
JPH0686080B2 (en) * 1988-12-02 1994-11-02 富士写真フイルム株式会社 Injection mold
DE3932016A1 (en) * 1989-09-26 1991-04-11 Agfa Gevaert Ag DEVICE FOR TWO-LAYER INJECTION MOLDING
JP2887832B2 (en) * 1994-04-15 1999-05-10 株式会社ニフコ Speaker grill and molding method thereof
DE19736082C1 (en) 1997-08-20 1999-01-14 Orga Kartensysteme Gmbh Method and manufacture of a chip card and device for carrying out the method
DE19808145A1 (en) * 1997-08-21 1999-02-25 Structoform Spritzgiesen Aniso Injection moulding of articles with two components
KR100419101B1 (en) * 2001-02-15 2004-02-19 전성도 Forming device for wallboard of vehicle
EP1559529A3 (en) * 2004-02-02 2005-10-19 The Procter & Gamble Company Preforms made of two or more materials and processes for obtaining them
US7462314B2 (en) 2004-02-24 2008-12-09 Mold-Masters (2007) Limited Multiple-material injection molding

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB814337A (en) * 1956-01-21 1959-06-03 Roberto Pietrocola A method for the manufacture of composite footwear soles and in particular of soles for shoes and sandals
JPS59133029A (en) * 1983-01-19 1984-07-31 Matsushita Electric Ind Co Ltd Resin molding and manufacture thereof
JPS61108519A (en) * 1984-11-02 1986-05-27 Yoshida Kogyo Kk <Ykk> Molding method of multi-color synthetic resin molded part, molding equipment and molded part thereof
JPH0657417B2 (en) * 1985-11-15 1994-08-03 ティーディーケイ株式会社 Molding die
JP3241453B2 (en) * 1992-09-25 2001-12-25 豊田工機株式会社 Grinding method

Also Published As

Publication number Publication date
IT1219561B (en) 1990-05-18
JPS63270113A (en) 1988-11-08
FR2614574A1 (en) 1988-11-04
GB2203984A (en) 1988-11-02
GB2203984B (en) 1990-05-30
IT8847897A0 (en) 1988-04-29
KR880012332A (en) 1988-11-26
GB8809761D0 (en) 1988-06-02

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