JP2508778B2 - Multicolor molding method and multicolor molding die - Google Patents
Multicolor molding method and multicolor molding dieInfo
- Publication number
- JP2508778B2 JP2508778B2 JP62328792A JP32879287A JP2508778B2 JP 2508778 B2 JP2508778 B2 JP 2508778B2 JP 62328792 A JP62328792 A JP 62328792A JP 32879287 A JP32879287 A JP 32879287A JP 2508778 B2 JP2508778 B2 JP 2508778B2
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- partition body
- injection
- mold plate
- regions
- 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
- B29C45/1639—Removable partitions between adjacent mould cavity portions
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、複数色の樹脂からなる製品を金型内で一体
成形するための多色成形方法および多色成形用金型に関
する。TECHNICAL FIELD The present invention relates to a multicolor molding method and a multicolor molding die for integrally molding a product made of resins of a plurality of colors in a mold.
「従来の技術」 第４図ないし第６図は、従来の多色成形方法の一例に
使用される金型を示す断面図である。"Prior Art" FIGS. 4 to 6 are sectional views showing a mold used in an example of a conventional multicolor molding method.
図中符号１は固定型板であり、ライナーストリッパ２
を介して固定取付板３に取り付けられている。また、前
記固定型板１と対向して可動型板４が配置され、可動取
付板５に固定されている。これら固定型板１と可動型板
４の間には製品の全体形状をなすキャビティ６が画成さ
れ、このキャビティ６の周辺部へ連通する一次注入通路
７、およびキャビティ６の中央部へ連通する二次注入通
路８（第５図参照）が形成されている。また可動型板４
内には、キャビティ６の中央部を閉塞するコア９が油圧
シリンダ10により出没操作可能に設けられている。In the figure, reference numeral 1 is a fixed template, and a liner stripper 2
It is attached to the fixed mounting plate 3 via. A movable mold plate 4 is arranged so as to face the fixed mold plate 1 and is fixed to a movable mounting plate 5. A cavity 6 having the overall shape of the product is defined between the fixed mold plate 1 and the movable mold plate 4, and a primary injection passage 7 communicating with the peripheral portion of the cavity 6 and a central portion of the cavity 6 are communicated with each other. A secondary injection passage 8 (see FIG. 5) is formed. The movable template 4
Inside, a core 9 that closes the center of the cavity 6 is provided so as to be retractable by a hydraulic cylinder 10.
上記金型により二色成形品を成形するには、まず、第
４図に示すようにコア９を前進させてキャビティ６の中
央部を閉塞したうえ、一次射出ノズル11から一次注入通
路７を経てキャビティ６の周辺部に一次材料を射出す
る。次いで第５図に示すように、シリンダ10を作動しコ
ア９を後退させ、二次射出ノズル12から二次注入路８を
経て、先程閉塞されていたキャビティ６の中央部に二次
材料を射出する。その後、第６図のように型開きし、周
辺部と中央部とが異なる樹脂で二色成形された成形品13
と、ランナー14とを取り出して１サイクルが終了する。In order to mold a two-color molded product with the above mold, first, as shown in FIG. 4, the core 9 is advanced to close the central part of the cavity 6, and then the primary injection nozzle 11 is passed through the primary injection passage 7. The primary material is injected into the peripheral portion of the cavity 6. Next, as shown in FIG. 5, the cylinder 10 is operated to retract the core 9, and the secondary material is injected from the secondary injection nozzle 12 through the secondary injection passage 8 into the central portion of the cavity 6 which was previously closed. To do. After that, the mold is opened as shown in FIG. 6, and the peripheral part and the central part are two-color molded with different resins.
Then, the runner 14 is taken out and one cycle is completed.
なお以上は二色成形の一例であったが、三色以上の成
形を行なう場合にも、二次，三次，…の樹脂材料を注入
すべき領域をそれぞれ別個のコアで閉塞しておき、これ
らコアを順次後退させながら各領域に樹脂を注入する方
法が採られている。Although the above is an example of two-color molding, even when molding three or more colors, the regions where the secondary, tertiary, ... Resin materials should be injected are closed by separate cores, respectively. A method of injecting resin into each region while sequentially retracting the core is adopted.
「発明が解決しようとする問題点」 しかし、上述した多色成形方法では、１サイクルにお
ける射出やコアの前進後退などの動作数が多く、しかも
各射出の間には樹脂固化時間をとる必要があるため、最
近の高速化要求に十分対応しきれないという問題があっ
た。また、二次材料を注入する部分全体をコアで閉塞し
ておくために、成形品の二次成形部分の形状を複雑であ
ると、コアの加工コストが高くつくうえ、コアが大きく
かつ重くならざるを得ず、コアの移動機構が複雑化する
欠点があり、このため成形品形状に対する制約が大きか
った。さらに、上記のようにコアでキャビティ内を閉塞
する方法を、特に三色以上の成形に適用すると、各コア
の前進後退や射出等の一連の動作を、所定時間をおいて
順次行なわせるための機構が極めて複雑化し、金型コス
トが著しく高くなる欠点があった。[Problems to be Solved by the Invention] However, in the above-described multicolor molding method, there are many operations such as injection in one cycle and advance / retreat of the core, and it is necessary to take a resin solidification time between each injection. Therefore, there is a problem that it is not possible to sufficiently meet the recent demand for speeding up. In addition, if the shape of the secondary molding part of the molded product is complicated because the entire part for injecting the secondary material is closed by the core, the processing cost of the core is high and the core is large and heavy Inevitably, there is a drawback that the moving mechanism of the core becomes complicated, and therefore the shape of the molded product is greatly restricted. Furthermore, when the method of closing the cavity with the core as described above is applied to molding of three colors or more, a series of operations such as forward / backward movement and injection of each core can be sequentially performed after a predetermined time. There is a drawback that the mechanism becomes extremely complicated and the die cost becomes extremely high.
「問題点を解決するための手段」 本発明は上記問題を解決するためになされたもので、
多色成形方法において、金型内で画成されたキャビティ
内に前記金型から出没自在に仕切り体を突出させ、該仕
切り体によって前記キャビティ内を２種以上の注入すべ
き領域に仕切った状態で、これら各領域に同時にそれぞ
れ注入材料を射出して前記各領域を充満させ、その後、
前記注入材料が固化しない時点で前記仕切り体を後退さ
せて各領域に注入された注入材料を互いに接合させるこ
とを特徴とする。"Means for Solving Problems" The present invention has been made to solve the above problems,
In the multi-color molding method, a partition body is projected into and retractable from the mold into a cavity defined in the mold, and the partition body partitions the cavity into two or more regions to be injected. Then, the injection material is injected into each of these regions at the same time to fill each of the regions, and then,
When the injection material is not solidified, the partition body is retracted to bond the injection materials injected into the respective regions to each other.
また、多色成形用金型において、重ね合わせ時にキャ
ビティを形成する固定型および可動型板と、前記キャビ
ティ内に前記固定型板および可動型板のいずれか一方か
ら出没自在に配され突出時にはキャビティを複数の領域
に仕切る仕切り体と、該仕切り体を前記キャビティ内に
進退させる仕切り体駆動機構とを備えてなり、前記固定
型板は、前記仕切り体で仕切られたキャビティの各領域
に個別に連通し、各領域ごとに異なる注入材料を充填す
る複数の注入通路が形成されていることを特徴とする。Further, in a multi-color molding die, a fixed mold and a movable mold plate that form a cavity at the time of superimposing, and a cavity that is arranged in the cavity so as to be retractable from either the fixed mold plate or the movable mold plate A partition body for partitioning into a plurality of areas, and a partition body drive mechanism for moving the partition body into and out of the cavity, wherein the fixed template is individually provided in each area of the cavity partitioned by the partition body. A plurality of injection passages that communicate with each other and are filled with a different injection material for each region are formed.
「作用」 この方法および金型によれば、複数種の注入材料を同
時にキャビティ内の仕切られた各領域に射出することに
より、成形サイクルが格段に短縮できるとともに、１サ
イクル中の動作回数が少ないので金型駆動機構が単純化
できる。また、仕切り体は金属板を折り曲げて形成する
こともできるから複雑な形状にも低コストで加工でき、
また軽量化される分、駆動機構の簡略化が図れる。[Operation] According to this method and the mold, the molding cycle can be markedly shortened by simultaneously injecting a plurality of kinds of injection materials into each partitioned area in the cavity, and the number of operations in one cycle is small. Therefore, the mold driving mechanism can be simplified. Further, since the partition body can be formed by bending a metal plate, it can be processed into a complicated shape at low cost,
Further, since the weight is reduced, the drive mechanism can be simplified.
「実施例」 以下、本発明に係わる多色成形方法の一実施例とし
て、前述の従来例と同じ製品の二色成形方法を説明す
る。[Examples] Hereinafter, as an example of the multicolor molding method according to the present invention, a two-color molding method for the same product as the conventional example will be described.
第１図ないし第３図はそのための二色成形金型を示す
もので、図中符号20は固定型板、21はランナーストリッ
パ、22は固定取付板、23は可動型板、24は可動取付板で
ある。1 to 3 show a two-color molding die therefor, in which reference numeral 20 is a fixed mold plate, 21 is a runner stripper, 22 is a fixed mounting plate, 23 is a movable mold plate, and 24 is a movable mounting plate. It is a plate.
前記固定型板20と可動型板23の間には製品の全体形状
をなすキャビティ25が形成され、また固定型板20とラン
ナーストリッパ21の内部には、前記キャビティ25の周辺
部に連通する一次注入通路26、およびキャビティ25の中
央部に連通する二次注入通路27が形成されている。さら
に固定取付板22には、前記各通路26,27に連通する一次
射出ノズル28、二次射出ノズル29がそれぞれ取り付けら
れている。A cavity 25 forming the overall shape of the product is formed between the fixed mold plate 20 and the movable mold plate 23, and inside the fixed mold plate 20 and the runner stripper 21, a primary cavity communicating with the peripheral portion of the cavity 25 is formed. An injection passage 26 and a secondary injection passage 27 communicating with the center of the cavity 25 are formed. Further, a primary injection nozzle 28 and a secondary injection nozzle 29, which communicate with the passages 26 and 27, are attached to the fixed mounting plate 22.
一方、可動型板23内には、一次材料を注入すべきキャ
ビティ25の周辺部と、二次材料を注入すべきキャビティ
25の中央部とを仕切る角筒状の仕切り体30が、油圧シリ
ンダ31によりキャビティ25内に出没操作可能に収容され
ている。この仕切り体30は薄肉の角筒状をなし、後退時
には先端が可動型板23のキャビティ面と揃うようにされ
ている。この仕切り体の先端は、平坦面，断面半円状，
鋭角状等，必要に応じて選択される。On the other hand, in the movable template 23, the periphery of the cavity 25 into which the primary material is to be injected and the cavity into which the secondary material is to be injected
A rectangular tubular partitioning body 30 for partitioning the center of 25 is housed in a cavity 25 by a hydraulic cylinder 31 so as to be retractable. The partition body 30 has a thin-walled rectangular tube shape, and the tip end thereof is aligned with the cavity surface of the movable template 23 when retracting. The tip of this partition has a flat surface, a semicircular cross section,
A sharp angle or the like is selected as needed.
この金型を用いて二色成形を行なうには、まず、油圧
シリンダ31を作動させて、仕切り体30をキャビティ25内
に突き出し、固定型板20との間に溶融樹脂が流れ出ない
程度（0.01〜0.02mm）の間隙をあけた状態で、一次射出
ノズル28および二次射出ノズル29の双方から同時に注入
材料を射出する。そして、注入された材料がキャビティ
25内で広がって仕切り体30に達し、かつ未だ固化しない
時点で、油圧シリンダ31を作動して仕切り体30をキャビ
ティ面に揃う位置まで後退させ、各注入材料を接合させ
る。なおその際、射出ノズル28,29によりキャビティ25
内の注入材料を適宜加圧しておく。そして樹脂が固化し
たら、第３図のように型開きし、二色成形品32とランナ
ー33を取り出し、再び初期状態に復帰させる。In order to perform two-color molding using this mold, first, the hydraulic cylinder 31 is operated to protrude the partition body 30 into the cavity 25, and the molten resin does not flow out between the fixed mold plate 20 (0.01 The injection material is simultaneously injected from both the primary injection nozzle 28 and the secondary injection nozzle 29 with a gap of ~ 0.02 mm). And the injected material is the cavity
At a point when the partition body 30 spreads in 25 to reach the partition body 30 and is not solidified yet, the hydraulic cylinder 31 is operated to retract the partition body 30 to a position aligned with the cavity surface, and the respective injection materials are bonded. At that time, the cavity 25 is
The injection material inside is appropriately pressurized. When the resin is solidified, the mold is opened as shown in FIG. 3, the two-color molded product 32 and the runner 33 are taken out, and the initial state is restored again.
以上の二色成形方法によれば、一次および二次注入材
料を同時にキャビティ25内に射出するため、成形サイク
ルが格段に短縮できるとともに、射出回数が１回で済む
分、駆動機構が単純化できる。また、仕切り体30は金属
板を折り曲げて形成することもできるので、複雑な形状
にも低コストで加工でき、成形品の形状に対する自由度
を高めることができる。また仕切り体30は従来法におけ
るコアに比して軽量なので、その分、駆動機構の簡略化
が図れる。さらに、この方法では、各注入材料が固化し
ないうちにこれらを接合させるため、一次樹脂が固化し
た後に二次樹脂をこれに接合させる従来法に比して接合
強度が向上できる。According to the above two-color molding method, the primary and secondary injection materials are simultaneously injected into the cavity 25, so that the molding cycle can be remarkably shortened and the drive mechanism can be simplified because only one injection is required. . Further, since the partition body 30 can be formed by bending a metal plate, it can be processed into a complicated shape at low cost and the degree of freedom with respect to the shape of the molded product can be increased. Further, since the partition body 30 is lighter in weight than the core in the conventional method, the drive mechanism can be simplified accordingly. Furthermore, in this method, since the respective injection materials are bonded before they solidify, the bonding strength can be improved as compared with the conventional method in which the secondary resin is bonded to the primary resin after it solidifies.
なお、上記実施例では二色成形方法を示したが、本発
明はこれに限られず、三色以上の成形にも容易に適用で
きる。その場合にも上例と同様に、各注入材料の領域を
仕切る仕切り体の前進後退、および各射出ノズルからの
注入をそれぞれ同時に行なえばよいから、従来法に比し
て金型の構成が格段に単純化でき、設備コストを低減す
ることが可能である。Although the two-color molding method is shown in the above embodiment, the present invention is not limited to this and can be easily applied to molding of three or more colors. In that case as well, as in the above example, it is sufficient to perform the forward and backward movements of the partitioning body for partitioning the regions of the respective injection materials and the injection from the respective injection nozzles at the same time. It is possible to simplify, and it is possible to reduce the equipment cost.
「発明の効果」 以上説明したように、本発明に係る多色成形方法およ
び多色成形用金型によれば、複数種の注入材料を同時に
キャビティ内の仕切られた各領域に射出することによ
り、成形サイクルを短縮して生産性向上が図れるととも
に、１サイクル中の動作数が少ないので金型駆動機構が
単純でよく、金型コストを低減することができる。ま
た、仕切り体は金属板を折曲加工して成形することもで
きるから、複雑な形状にも低コストで加工でき、成形品
の形状に対する自由度を高めることができる。また仕切
り体はコアに比して軽量なので、その分、駆動機構の簡
略化が図れる。さらに、この方法では、各樹脂が固化し
ないうちにこれらを接合させるため、各樹脂の接合強度
を向上できる。[Effects of the Invention] As described above, according to the multicolor molding method and the multicolor molding die according to the present invention, it is possible to simultaneously inject a plurality of types of injection materials into the respective partitioned areas in the cavity. The molding cycle can be shortened to improve the productivity, and the number of operations in one cycle is small, so that the mold driving mechanism can be simple and the mold cost can be reduced. Further, since the partition body can be formed by bending a metal plate, it can be processed into a complicated shape at low cost, and the flexibility of the shape of the molded product can be increased. Moreover, since the partition body is lighter than the core, the drive mechanism can be simplified accordingly. Furthermore, in this method, since the resins are bonded before they solidify, the bonding strength of the resins can be improved.
第１図ないし第３図は、本発明に係わる多色成形方法の
一実施例に使用される金型の縦断面図である。 一方、第４図ないし第６図は、従来の多色成形方法に使
用される金型の縦断面図である。 20……固定型板、22……固定取付板、 23……可動型板、24……可動取付板、 25……キャビティ、26……一次注入通路、 27……二次注入通路、30……仕切り体、 31……油圧シリンダ、32……二色成形品。1 to 3 are vertical sectional views of a mold used in an embodiment of the multicolor molding method according to the present invention. On the other hand, FIGS. 4 to 6 are vertical sectional views of a mold used in a conventional multicolor molding method. 20: Fixed template, 22: Fixed mounting plate, 23: Movable template, 24: Movable mounting plate, 25: Cavity, 26 ... Primary injection passage, 27 ... Secondary injection passage, 30 ... … Partitions, 31 …… Hydraulic cylinders, 32… Two-color molded products.
Claims (2)
型から出没自在に仕切り体を突出させ、該仕切り体によ
って前記キャビティ内を２種以上の注入すべき領域に仕
切った状態で、これら各領域に同時にそれぞれ注入材料
を射出して前記各領域を充満させ、その後、前記注入材
料が固化しない時点で前記仕切り体を後退させて各領域
に注入された注入材料を互いに接合させることを特徴と
する多色成形方法。1. A state in which a partition body is protruded from the mold so as to project from and retract into a cavity defined in the mold and the inside of the cavity is partitioned into two or more regions to be injected by the partition body. Injecting the injection material into each of these regions at the same time to fill the respective regions, and thereafter, when the injection material does not solidify, the partition body is retracted to bond the injection materials injected into the regions to each other. And a multicolor molding method.
型板および可動型板と、 前記キャビティ内に前記固定型板および可動型板のいず
れか一方から出没自在に配され突出時にはキャビティを
複数の領域に仕切る仕切り体と、 該仕切り体を前記キャビティ内に進退させる仕切り体駆
動機構とを備えてなり、 前記固定型板は、前記仕切り体で仕切られたキャビティ
の各領域に個別に連通し、各領域ごとに異なる注入材料
を充填する複数の注入通路が形成されていることを特徴
とする多色成形用金型2. A fixed mold plate and a movable mold plate which form a cavity at the time of stacking, and a fixed mold plate and a movable mold plate which are arranged in the cavity so as to be retractable and retractable from one of the fixed mold plate and the movable mold plate. A partition body, and a partition body drive mechanism for moving the partition body into and out of the cavity, wherein the fixed template is individually communicated with each region of the cavity partitioned by the partition body. A multi-color molding die characterized in that a plurality of injection passages are formed to fill different injection materials in respective regions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62328792A JP2508778B2 (en) | 1987-12-25 | 1987-12-25 | Multicolor molding method and multicolor molding die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62328792A JP2508778B2 (en) | 1987-12-25 | 1987-12-25 | Multicolor molding method and multicolor molding die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01168414A JPH01168414A (en) | 1989-07-03 |
| JP2508778B2 true JP2508778B2 (en) | 1996-06-19 |
Family
ID=18214162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62328792A Expired - Lifetime JP2508778B2 (en) | 1987-12-25 | 1987-12-25 | Multicolor molding method and multicolor molding die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2508778B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200006709A (en) * | 2018-07-11 | 2020-01-21 | (주)이피엠테크 | Molding apparatus and its separator member |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4507861B2 (en) * | 2004-12-01 | 2010-07-21 | 河西工業株式会社 | Multicolor molded product molding method and mold |
| CN105584055B (en) * | 2015-12-31 | 2017-12-01 | 楼仲平 | A kind of preparation method and its product of double-colored material heat discoloration suction pipe |
| JP6871017B2 (en) * | 2017-02-27 | 2021-05-12 | 西川ゴム工業株式会社 | Manufacturing method of multicolor molded products |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6312981Y2 (en) * | 1980-06-07 | 1988-04-13 |
-
1987
- 1987-12-25 JP JP62328792A patent/JP2508778B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200006709A (en) * | 2018-07-11 | 2020-01-21 | (주)이피엠테크 | Molding apparatus and its separator member |
| KR102151777B1 (en) | 2018-07-11 | 2020-09-03 | (주)이피엠테크 | Molding apparatus and its separator member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01168414A (en) | 1989-07-03 |
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