JP2718198B2 - Injection mold - Google Patents
Injection moldInfo
- Publication number
- JP2718198B2 JP2718198B2 JP1199096A JP19909689A JP2718198B2 JP 2718198 B2 JP2718198 B2 JP 2718198B2 JP 1199096 A JP1199096 A JP 1199096A JP 19909689 A JP19909689 A JP 19909689A JP 2718198 B2 JP2718198 B2 JP 2718198B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- injection material
- filling
- movable
- mold plate
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of 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、例えばオーディオ用カセットハーフのよう
に二色成形を行う樹脂成形品の射出成形用金型に係り、
特に、一定注入材料と二次注入材料との境界面が曲面と
される樹脂成形品の射出成形用金型に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a mold for injection molding of a resin molded product which performs two-color molding such as an audio cassette half.
In particular, the present invention relates to a mold for injection molding of a resin molded product in which a boundary surface between a fixed injection material and a secondary injection material is a curved surface.
従来、例えば、オーディオ用カセットハーフを二色成
形する場合には、型開き方向に移動自在な型体を用い
て、一次注入材料充填時に、この型体によって、二次注
入材料充填空間を閉塞した状態で一次注入材料を充填し
た後、上記型体を型開き方向に移動させて、二次注入材
料充填空間を形成した状態で二次注入材料を充填して二
色成形品を製造していた。Conventionally, for example, when performing two-color molding of an audio cassette half, using a mold that is movable in the mold opening direction, when filling the primary injection material, the secondary injection material filling space is closed by this mold. After filling the primary injection material in the state, the mold was moved in the mold opening direction, and the secondary injection material was filled in a state where the secondary injection material filling space was formed to produce a two-color molded product. .
ところで、第３図ないし第５図に示すように、カセッ
トハーフ１の中央部に透明な樹脂で成形された二次注入
材料充填部２が配置され、この二次注入材料充填部２の
まわりに有色の樹脂で成形された一次注入材料充填部３
が覆うように配設されると共に、一次，二次注入材料充
填部2,3の境界面４が曲面とされた二色成形品は、外方
から見た場合、二次注入材料充填部２の厚みが各部にお
いて違うため、各部の色彩が異なって見え、意匠性が良
好である。As shown in FIGS. 3 to 5, a secondary filling material filling portion 2 formed of a transparent resin is disposed at the center of the cassette half 1, and around the secondary filling material filling portion 2. Primary injection material filling section 3 molded with colored resin
The two-color molded article, which is disposed so as to cover and has a curved boundary surface 4 between the primary and secondary injection material filling sections 2 and 3, when viewed from the outside, the secondary injection material filling section 2. Since the thickness of each part is different in each part, the color of each part looks different, and the design is good.
しかしながら、上記カセットハーフ１を上述した二色
成形金型で成形しようとすると、上記型体の彫刻面が、
一次注入材料充填時に二次注入材料充填空間を閉塞する
曲面（境界面４）と、二次注入材料充填空間を形成する
平面（表面５）とを兼用となければならず、この方法で
は二色成形することはできない。However, when trying to mold the cassette half 1 with the above-described two-color molding die, the engraved surface of the mold body becomes
When filling the primary injection material, the curved surface (boundary surface 4) that closes the secondary injection material filling space and the plane (surface 5) that forms the secondary injection material filling space must be shared. It cannot be molded.
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、一次注入材料と二次注入材料との境
界面が曲面とされる樹脂成形品を円滑にかつ確実に二色
成形することができる射出成形用金型を提供することに
ある。The present invention has been made in view of the above circumstances, and an object thereof is to smoothly and surely perform two-color molding of a resin molded product having a curved boundary surface between a primary injection material and a secondary injection material. It is an object of the present invention to provide a mold for injection molding which can be performed.
上記目的を達成するために、本発明の射出成形用金型
は、固定型板と、型締め時に該固定型板との間に一次注
入材料と二次注入材料との充填空間を形成する型開き方
向に移動可能な可動型板とを備え、該可動型板には、可
動型板とは別に型開き方向に移動可能な型体が設置さ
れ、該型体は、型開き方向の両端面に一次注入材料充填
時に二次注入材料の充填空間を閉塞する第１の彫刻面
と、二次注入材料充填時に二次注入材料の充填空間を形
成する第２の彫刻面とがそれぞれ形成されてなり、一次
注入材料充填後に型締め状態で前記可動型板から前記型
体を引き抜き、該型体を180゜回転させた後にこの型体
を可動型板に押し込み、前記第２の彫刻面で二次注入材
料の充填空間を形成する回転機構が設けられたものであ
る。In order to achieve the above object, an injection mold according to the present invention has a fixed mold plate, and a mold for forming a filling space of a primary injection material and a secondary injection material between the fixed mold plate during mold clamping. A movable mold plate movable in the opening direction, wherein the movable mold plate is provided with a mold body movable in the mold opening direction separately from the movable mold plate, and the mold body has both end faces in the mold opening direction. A first engraving surface for closing the space for filling the secondary injection material when filling the primary injection material, and a second engraving surface for forming a space for filling the secondary injection material when filling the secondary injection material. After filling the primary injection material, the mold is pulled out from the movable mold plate in a mold-clamped state, and after rotating the mold by 180 °, the mold is pushed into the movable mold plate. A rotary mechanism for forming a filling space for the next injection material is provided.
本発明の射出成形用金型にあっては、一次注入材料充
填時に、型体の第１の彫刻面によって二次注入材料の充
填空間を閉塞すると共に、二次注入材料充填時には、回
転機構によって、型体を半回転させて、型体の第２の彫
刻面によって二次注入材料の充填空間を形成する。In the injection molding mold of the present invention, the filling space of the secondary injection material is closed by the first engraved surface of the mold at the time of filling the primary injection material, and the rotating mechanism is used at the time of filling the secondary injection material. Then, the mold is rotated half a turn to form a filling space for the secondary injection material by the second engraved surface of the mold.
以下、第１図ないし第５図に基づいて本発明の一実施
例を説明する。An embodiment of the present invention will be described below with reference to FIGS.
第１図と第２図は、第３図ないし第５図に示すオーデ
ィオ用のカセットハーフ１を成形する射出成形用金型の
一例を説明するもので、これらの図において符号10は、
カセットハーフ１の表面５を形成するための可動型板で
ある。この可動型板10に対向して、カセットハーフ１の
裏面６を形成するための固定型板11が配置されており、
固定型板11に対して可動型板10が接近，離間自在に設け
られている。そして、上記可動型板10には、可動型体12
が型開き方向に移動自在にかつ型開き方向に平行な面内
において回転自在に設置されており、この可動型体12の
対向する一対の面には、一次注入材料充填時に二次注入
材料充填空間を閉塞する（カセットハーフ１の境界面４
を形成する）第１の彫刻面12aと、二次注入材料充填時
に二次注入材料充填空間（カセットハーフ１の表面５）
を形成する第２の彫刻面12bとがそれぞれ刻設されてい
る。また、上記可動型体12にはピニオン13が設けられて
おり、このピニオン13には、ピニオン13を回転させるラ
ック14が噛合されている。FIGS. 1 and 2 illustrate an example of an injection molding die for molding the audio cassette half 1 shown in FIGS. 3 to 5. In these figures, reference numeral 10 denotes
This is a movable plate for forming the surface 5 of the cassette half 1. A fixed mold plate 11 for forming the back surface 6 of the cassette half 1 is disposed opposite to the movable mold plate 10.
The movable mold plate 10 is provided so as to approach and separate from the fixed mold plate 11. The movable mold plate 10 includes a movable mold 12
Are mounted so as to be movable in the mold opening direction and rotatable in a plane parallel to the mold opening direction, and a pair of opposing surfaces of the movable mold body 12 are filled with the secondary injection material at the time of filling the primary injection material. Close the space (boundary surface 4 of cassette half 1)
The first engraving surface 12a and a space for filling the secondary injection material (the surface 5 of the cassette half 1) when the secondary injection material is filled
And the second engraved surface 12b that forms Further, a pinion 13 is provided on the movable body 12, and a rack 14 for rotating the pinion 13 is meshed with the pinion 13.
上記固定型板11には第１受板15が固定されており、こ
の第１受板15には所定距離離間して第２受板16が設けら
れている。そして、第1,第２受板15,16間には、第1,第
2,第３突出板17,18,19が型開き方向に移動可能に設けら
れており、これらの突出板17,18,19に基端部を固定され
た突出ピン20が第１受板15,固定型板11を貫通して、可
動型板10と固定型板11間に形成されるキャビティ21に出
没するように構成されている。また、第２受板16から、
第3,第2,第１突出板19,18,17、第１受板15、固定型板11
を貫通して、一次注入材料（有色樹脂）供給用の溶融樹
脂通路22と、二次注入材料（透明樹脂）供給用の溶融樹
脂通路23とがそれぞれ形成されている。A first receiving plate 15 is fixed to the fixed mold plate 11, and a second receiving plate 16 is provided on the first receiving plate 15 at a predetermined distance. And, between the first and second receiving plates 15 and 16, the first and second
2, third projecting plates 17, 18, and 19 are provided so as to be movable in the mold opening direction, and projecting pins 20 having base ends fixed to the projecting plates 17, 18, 19 are provided with first receiving plates 15; The movable mold plate 10 penetrates the fixed mold plate 11 and projects into and out of a cavity 21 formed between the movable mold plate 10 and the fixed mold plate 11. Also, from the second receiving plate 16,
Third, second, first projecting plates 19, 18, 17, first receiving plate 15, fixed mold plate 11
, A molten resin passage 22 for supplying a primary injection material (colored resin) and a molten resin passage 23 for supplying a secondary injection material (transparent resin) are formed.
上記のように構成された射出成形用金型を用いて、第
３図ないし第５図に示すカセットハーフ１を二色成形す
る場合には、まず、可動型体12の第１の彫刻面12aを固
定型板11側に向けた状態で、可動型体12を固定型板11に
近付け、キャビティ21内の二次注入材料充填空間を可動
型体12によって閉塞する。この状態において、溶融樹脂
通路22を通して一次注入材料を上記キャビティ21内に注
入する。When two-color molding of the cassette half 1 shown in FIGS. 3 to 5 is performed using the injection molding die configured as described above, first, the first engraving surface 12a of the movable mold body 12 is formed. The movable mold body 12 is brought close to the fixed mold plate 11 with the head facing the fixed mold plate 11 side, and the space filled with the secondary injection material in the cavity 21 is closed by the movable mold body 12. In this state, the primary injection material is injected into the cavity 21 through the molten resin passage 22.
次いで、可動型体12を可動型板10内から引き抜いた
後、ラック14を操作して、ピニオン13及びこのピニオン
13が取付けられている可動型体12を180゜回転させて、
可動型体12の第２の彫刻面12bが固定型板10側を向くよ
うにする。続いて、可動型体12を可動型板10内に押し込
み、可動型体12の第２の彫刻面12bを可動型板10の彫刻
面に合わせた後、溶融樹脂通路23を介して二次注入材料
をキャビティ21内に注入する。Next, after the movable mold body 12 is pulled out of the movable mold plate 10, the rack 14 is operated, and the pinion 13 and the pinion 13 are moved.
Rotate the movable body 12 on which 13 is attached by 180 °,
The second engraving surface 12b of the movable mold body 12 faces the fixed mold plate 10 side. Subsequently, the movable mold 12 is pushed into the movable mold plate 10, and the second engraved surface 12 b of the movable mold body 12 is matched with the engraved surface of the movable mold plate 10, and then the secondary injection is performed through the molten resin passage 23. A material is injected into the cavity 21.
さらに、キャビティ21内の樹脂が冷却固化した後に、
固定型板11に対して可動型板10及び可動型体12を開く
と、成形品は、固定型板11側に付着して残るから、この
成形品を突出ピン20を突出することにより固定型板11か
ら離型させて取り出す。Further, after the resin in the cavity 21 is cooled and solidified,
When the movable mold plate 10 and the movable mold body 12 are opened with respect to the fixed mold plate 11, the molded product adheres to the fixed mold plate 11 side and remains. Release from the plate 11 and take it out.
このようにして二色成形されたカセットハーフ１は、
可動型体12の第1,第２の彫刻面12a,12bを、一次成形時
と二次成形時とにおいて使い分けることにより、所望の
曲面の境界面４が得られ、優れた意匠性を発揮すると共
に、従来のカセットハーフと同様に、カセットハーフと
しての機能も十分に有する。The cassette half 1 thus formed in two colors is
By selectively using the first and second engraved surfaces 12a and 12b of the movable mold body 12 at the time of primary molding and at the time of secondary molding, a desired curved boundary surface 4 is obtained, and excellent design properties are exhibited. At the same time, similarly to the conventional cassette half, it has a sufficient function as a cassette half.
以上説明したように、本発明の射出成形用金型は、固
定型板と、型締め時に該固定型板との間に一次注入材料
と二次注入材料との充填空間を形成する型開き方向に移
動可能な可動型板とを備え、該可動型板には、可動型板
とは別に型開き方向に移動可能な型体が設置され、該型
体は、型開き方向の両端面に一次注入材料充填時に二次
注入材料の充填空間を閉塞する第１の彫刻面と、二次注
入材料充填時に二次注入材料の充填空間を形成する第２
の彫刻面とがそれぞれ形成されてなり、一次注入材料充
填後に型締め状態で前記可動型板から前記型体を引き抜
き、該型体を180゜回転させた後にこの型体を可動型板
に押し込み、前記第２の彫刻面で二次注入材料の充填空
間を形成する回転機構が設けられたものであるから、一
次注入材料充填時には、型体の第１の彫刻面によって二
次注入材料の充填空間を閉塞すると共に、二次注入材料
充填時には、回転機構によって、型体を半回転させて、
型体の第２の彫刻面によって二次注入材料の充填空間を
形成することにより、一次注入材料と二次注入材料との
境界面が曲面とされる樹脂成形品を円滑にかつ確実に二
色成形することができて、意匠性に優れた製品を容易に
成形できる。As described above, the mold for injection molding of the present invention has a fixed mold plate, and a mold opening direction in which a filling space of the primary injection material and the secondary injection material is formed between the fixed mold plate and the fixed mold plate at the time of mold clamping. A movable mold plate movable in the mold opening direction, separately from the movable mold plate, and the mold body is disposed on both end surfaces in the mold opening direction. A first engraving surface that closes the space for filling the secondary injection material when filling the injection material, and a second engraving surface that forms the space for filling the secondary injection material when filling the secondary injection material.
After the primary injection material is filled, the mold is pulled out of the movable mold plate in a mold clamped state after the primary injection material is filled, and the mold is rotated by 180 °, and then the mold is pressed into the movable mold plate. Since the second engraving surface is provided with a rotary mechanism for forming a space for filling the secondary injection material, the first injection material is filled with the secondary injection material at the time of filling the primary injection material. While closing the space, at the time of filling the secondary injection material, by rotating mechanism, half turn the mold,
By forming the filling space of the secondary injection material by the second engraved surface of the mold, the resin molded product in which the boundary surface between the primary injection material and the secondary injection material is a curved surface is smoothly and reliably two-colored. It can be molded, and a product excellent in design can be easily molded.
第１図と第２図は本発明の一実施例を示すもので、第１
図は断面図、第２図は可動型体部の断面図、第３図ない
し第５図は本発明の射出成型用金型を用いて二色成形す
るカセットハーフの一例を示すもので、第３図は平面
図、第４図は第３図のIV−IV線に沿う断面図、第５図は
第３図のＶ−Ｖ線に沿う断面図である。 １……カセットハーフ、２……二次注入材料充填部、３
……一次注入材料充填部、４……境界面、12……可動型
体、12a……第１の彫刻面、12b……第２の彫刻面、13…
…ピニオン（回転機構）、14……ラック（回転機構）。1 and 2 show an embodiment of the present invention.
FIG. 2 is a cross-sectional view, FIG. 2 is a cross-sectional view of a movable mold part, and FIGS. 3 to 5 show an example of a cassette half for two-color molding using the injection mold of the present invention. 3 is a plan view, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is a sectional view taken along line VV in FIG. 1 ... cassette half, 2 ... secondary filling material filling section, 3
... primary filling material filling section, 4 ... boundary surface, 12 ... movable body, 12a ... first engraved surface, 12b ... second engraved surface, 13 ...
... Pinion (rotation mechanism), 14 ... Rack (rotation mechanism).
Claims (1)
曲面とされる樹脂成形品を二色成形するための射出成形
用金型であって、 固定型板と、 型締め時に該固定型板との間に一次注入材料と二次注入
材料との充填空間を形成する型開き方向に移動可能な可
動型板とを備え、 該可動型板には、可動型板とは別に型開き方向に移動可
能な型体が設置され、 該型体は、型開き方向の両端面に一次注入材料充填時に
二次注入材料の充填空間を閉塞する第１の彫刻面と、二
次注入材料充填時に二次注入材料の充填空間を形成する
第２の彫刻面とがそれぞれ形成されてなり、 一次注入材料充填後に型締め状態で前記可動型板から前
記型体を引き抜き、該型体を180゜回転させた後にこの
型体を可動型板に押し込み、前記第２の彫刻面で二次注
入材料の充填空間を形成する回転機構が設けられたこと
を特徴とする射出成形用金型。An injection molding die for two-color molding a resin molded product in which a boundary surface between a primary injection material and a secondary injection material is curved, comprising: a fixed mold plate; A movable mold plate movable in the mold opening direction to form a space for filling the primary injection material and the secondary injection material between the fixed mold plate and the movable mold plate; A mold body movable in the opening direction is provided, the mold body includes a first engraved surface that closes a filling space of the secondary injection material when filling the primary injection material on both end surfaces in the mold opening direction, and a secondary injection material. A second engraved surface forming a filling space for the secondary injection material is formed at the time of filling, and after the primary injection material is filled, the mold is pulled out from the movable mold plate in a mold clamped state, and the mold is removed by 180゜ After being rotated, this mold is pressed into the movable mold plate, and the second engraved surface is filled with the secondary injection material. Injection mold wherein the rotating mechanism is provided to form a space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1199096A JP2718198B2 (en) | 1989-07-31 | 1989-07-31 | Injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1199096A JP2718198B2 (en) | 1989-07-31 | 1989-07-31 | Injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0361520A JPH0361520A (en) | 1991-03-18 |
| JP2718198B2 true JP2718198B2 (en) | 1998-02-25 |
Family
ID=16402055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1199096A Expired - Lifetime JP2718198B2 (en) | 1989-07-31 | 1989-07-31 | Injection mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2718198B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139520A (en) * | 2011-03-10 | 2011-08-03 | 浙江洁瓴实业有限公司 | Double-color plastic rod and double injection mould |
| CN102173034A (en) * | 2011-03-10 | 2011-09-07 | 浙江洁瓴实业有限公司 | Double-injection mold |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2896719B1 (en) * | 2006-01-27 | 2010-04-30 | Faurecia Interieur Ind | INJECTION MOLDING MOLD COMPRISING TWO PORTIONS MADE FROM DIFFERENT MATERIALS. |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6225025A (en) * | 1985-07-25 | 1987-02-03 | Brother Ind Ltd | Molding method for two-colored resin product and its molding device |
-
1989
- 1989-07-31 JP JP1199096A patent/JP2718198B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139520A (en) * | 2011-03-10 | 2011-08-03 | 浙江洁瓴实业有限公司 | Double-color plastic rod and double injection mould |
| CN102173034A (en) * | 2011-03-10 | 2011-09-07 | 浙江洁瓴实业有限公司 | Double-injection mold |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0361520A (en) | 1991-03-18 |
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