JPS5973930A - Manufacture of synthetic resin molded shape - Google Patents
Manufacture of synthetic resin molded shapeInfo
- Publication number
- JPS5973930A JPS5973930A JP18555482A JP18555482A JPS5973930A JP S5973930 A JPS5973930 A JP S5973930A JP 18555482 A JP18555482 A JP 18555482A JP 18555482 A JP18555482 A JP 18555482A JP S5973930 A JPS5973930 A JP S5973930A
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- molding
- shape
- mold
- core
- 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
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
- B29C45/1675—Making multilayered or multicoloured articles using exchangeable mould halves
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】
本発明は単一の成形材料を用いた合成樹脂成形品の製造
方法、特に複数段階に分けて射出成形し、目的の形状を
備えた成形品を製造する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a synthetic resin molded article using a single molding material, and particularly to a method for manufacturing a molded article with a desired shape by injection molding in multiple steps. It is.
従来から、２柚の異なった成形材料あるいは同棹で異色
の成形材料を用いてコ段階の射出成形を行ない、所定の
成形品を得ることがしばしば行なわれている。このよう
な方法の提案σ）７つとして、例えば特開昭５７−Ａ９
００７号公報に記載された一ホ成形法がある。この成形
方法はλつのコアの連結したコア型と、２つのキャビテ
ィの連結したキャビティ型により金型を構成し、コ基σ
つ射出成形機を用いて行なうものである。すなわち先ず
キャビティ型の第１キヤビテイに連結した第１射出成形
機によって・コア型のかｌコアとキャビティ型の第１キ
ヤビテイとにより、常法ａり第１次射出成形を行なう。Conventionally, a predetermined molded product has often been obtained by performing injection molding in two stages using two different molding materials or the same molding material with different colors. For example, Japanese Patent Application Laid-Open No. 57-A9
There is a one-hole molding method described in Japanese Patent No. 007. This molding method consists of a core mold in which λ cores are connected and a cavity mold in which two cavities are connected.
This is done using an injection molding machine. That is, first, primary injection molding is carried out in a conventional manner using a first injection molding machine connected to a first cavity of a cavity type, and a first injection molding machine of a core type and a first cavity of a cavity type.
そして第１次成形物が第７コア上に残るように型を開き
、次いでコア型を／ｇ００回転させて、第１コアと第コ
キャビテイとから金型を形成し第コキャビテイに連結し
た第２の射出成形機によって、第２次の射出成形を行な
い金型を開いて所定形状の成形品を得るようになってい
る。Then, the mold was opened so that the primary molded product remained on the seventh core, and then the core mold was rotated by /g00 to form a mold from the first core and the first co-cavity. The injection molding machine performs secondary injection molding, opens the mold, and obtains a molded product of a predetermined shape.
従ってこのような方法では１つの成形品を得るために一
台の射出成形機を必要とし装置的に煩雑であり、成形コ
ストがか−るため、異種や異色の成形材料を用いる場合
に限られている。Therefore, this method requires one injection molding machine to obtain one molded product, is complicated in terms of equipment, and increases molding costs, so it is limited to cases where different types or colors of molding materials are used. ing.
ところで同一の成形材料を用い射出成形し成形品を得る
場合においても、最近では成形品の肉厚が極端に厚い成
形品や、大型の成形品を製造する茨木が吊されている。By the way, even when molded products are obtained by injection molding using the same molding material, recently, molded products with extremely thick walls or large-sized molded products have been manufactured in Ibaraki.
このような成形品のうち前者の場合はフローモールディ
ング法等によって成１１’Ｊすることが多いが、この方
法では成形サイクルが極端に長くなり過ぎてコストアッ
プｆきたし、一般の射出成形法ではひげやウェルドが発
生して製品化しえない場合が多い。Among these molded products, the former is often formed by a flow molding method, etc., but this method requires an extremely long molding cycle and increases costs, and the general injection molding method In many cases, it is impossible to commercialize the product due to the occurrence of welding or welding.
一方後者σ〕場合は、成形品σつ大きさに応じた射出容
蹴と型締力とを備えた大型成形機を必要とし、投下資本
が増大し、経済性の面からの制約：？受けることが多い
。On the other hand, in the latter case, a large molding machine with an injection capacity and mold clamping force corresponding to the size of the molded product is required, which increases the invested capital and imposes economic constraints. I often receive it.
本発明は、このように単一の成形材料を用いる成形品が
極端に厚肉であったり大型であっても、可及的に小型の
射出成形機を用いて成形しつる方法に関するものである
。すなわち本発明の要旨とするところは、合成樹脂成形
材料を複数段階に分けて射出成形して所定形状の合成樹
脂成形品を製造する方法であって、単一のコア型を共通
して使用すると共に、該コア型に対応しかつ目的形状を
備えた複数個のキャビティを配設したキャビティ型を使
用し、該キャビティ型をコア型に対し移動自在に設置し
て、コア型とキャビティ型の一つのキャビティとを対応
させて第１次の射出成形を行ない、次いでコア型に第１
次成形品２つけたま＼他のキャビティと対応させて第２
次またはそれ以降の成形を行ない、所定形状の成形品を
得るようにしたことを特徴とする合成樹脂成形品の製造
方法にある。The present invention relates to a method of molding a molded product using a single molding material using an injection molding machine as small as possible even if the molded product is extremely thick or large. . In other words, the gist of the present invention is a method for manufacturing a synthetic resin molded product of a predetermined shape by injection molding a synthetic resin molding material in multiple stages, in which a single core mold is commonly used. At the same time, a cavity mold having a plurality of cavities corresponding to the core mold and having a desired shape is used, and the cavity mold is installed movably relative to the core mold, so that the core mold and the cavity mold are integrated. The first injection molding is performed by matching the two cavities, and then the first injection molding is performed in the core mold.
Next, attach the molded product 2 and make it correspond to the other cavity.
A method for manufacturing a synthetic resin molded article, characterized in that a molded article of a predetermined shape is obtained by performing subsequent or subsequent molding.
以下、本発明を実施例の図面に従って説明する。The present invention will be described below with reference to drawings of embodiments.
第１図囚〜（Ｇ）は本発明の製造工程を概略的に示す説
明図で、図中（１）はコア（／ｌ）を備えたコア型、（
，２）は第１キヤビテイ（２／）および第コキャビテイ
（２２）を備えたキャビティ型である。このときの第コ
キャビテイ（コ２）は第１キヤビテイ（２υより若干大
きくなっている。なお図中（，２／ａ）は第１キヤビテ
イ（２υに穿設された射出孔、（２２ａ）は第１キヤビ
テイ（，２２）に穿設された射出孔である〇′Ｊｌ！！
造工程を順に説明すると、第１図い）はコア型（１）と
キャビティ型（，２ンが開いた準備段階で・この状態か
らコア型ｔ／）とキャビティ型（，２）の第１キヤビテ
イ（：ｌ／）とを対応させて成形空間を形成し、第７図
ＩＪ３）の如く第７次の射Ｌｉｌ成形を行なう。この際
成形材料は射１．Ｌ（成形機（図示略）によって溶融さ
才１１第１キャビティ（２））の射出孔（２／ａ）より
ｆＡ］出される。第７次の成形が終了し、コア型（１）
とキャビティ型（２）を開くときは、第１図ｔＣ）のよ
うにコア型１／）に第７次成形品ｔＩ）を付着させて行
ない・第１図Ｄ）のようにスプルを切断し、第コの成形
に備えると共に、キャピテイ型（２）を矢印（イ）方向
に摺動させる。第１図凹）は、キャビティ型（，２）を
摺動させて第２次の射出成形を行なう直前の状態を示し
ており、引続き第１次の成形のときと同様に、金型を閉
じる。このときの射出成形はコア（／／）と第２キヤビ
テイ（２，２）との間で行なわれ、射出孔（２λａ）よ
り第一次の射出成形を行なう。第一次の射出成形を終了
したのちは第１図ＩＧ）の如く金型を開き、成形品をと
り出すが、このときの成形品は第２図にも示すように第
１次の成形品ＬＩ）の外面に第２次の成形品但が一体的
に重層さｎＴ−厚肉成形品が得られる。なお、これらの
成形品は図面での説明の便宜上米なるハツチングの方向
で示しているが、第１次の成形品が冷えないように第一
次の成形が車ねて行なわれるため・両者の境の面は混然
と一体化された製品となる。勿論、このように所定形状
を［ｉ＃ ７した成、形品をコ段階に分けて射出成形す
る１こめ、第１次および第２次の射出成形品は所定の％
の肉厚に抑えることができ、各成形のサイクルが短縮し
、２回の成形サイクルを合計してもフローモールディン
グ法のような長いサイクルを必要としなくなるし、小型
の射出成形機によって成形品を製造することができるよ
うになる。またコ段階に分けて成形するために、ひ（づ
やウェルドの発生が少なくなり、第１次の成ｊ１ソ晶に
仮にひげやウェルドがあっても、第一次の１あ形によっ
てこれを矯正しつる利点がある□なお、上記の例におい
ては、コア型（１）と射出成形機を固定とし、キャビテ
ィ型（２）を摺動させているため、機構も複雑とならず
、その移動量も比較的小さくてすむ口ととなる。Figures 1 to 1 (G) are explanatory diagrams schematically showing the manufacturing process of the present invention, in which (1) is a core mold equipped with a core (/l), (
, 2) is a cavity type having a first cavity (2/) and a co-cavity (22). At this time, the first cavity (K2) is slightly larger than the first cavity (2υ). In the figure, (, 2/a) is the injection hole drilled in the first cavity (2υ), and (22a) is the injection hole drilled in the first cavity (2υ). 〇′Jl which is the injection hole drilled in 1 cavity (,22)!!
To explain the manufacturing process in order, the core mold (1) and the cavity mold (2) are opened at the preliminary stage. From this state, the core mold (t/) and the first cavity mold (2) are formed. A molding space is formed in correspondence with the cavity (:l/), and the seventh injection molding is performed as shown in FIG. 7 (IJ3). At this time, the molding material is 1. L (fA] is melted by a molding machine (not shown) and is ejected from the injection hole (2/a) of the first cavity (2) of the molding machine 11). The seventh molding is completed, and the core mold (1)
When opening the cavity mold (2), attach the seventh molded product tI) to the core mold 1/) as shown in Figure 1C) and cut the sprue as shown in Figure 1D). , In preparation for the third molding, the cavity mold (2) is slid in the direction of arrow (A). Figure 1 (concave) shows the state immediately before the second injection molding is performed by sliding the cavity mold (, 2), and then the mold is closed in the same way as the first molding. . Injection molding at this time is performed between the core (//) and the second cavity (2, 2), and primary injection molding is performed through the injection hole (2λa). After the first injection molding is completed, the mold is opened as shown in Figure 1 (IG) and the molded product is taken out. A second molded product is integrally layered on the outer surface of LI) to obtain a thick-walled molded product. Note that these molded products are shown in the direction of hatching for convenience of explanation in the drawings, but because the first molding is performed in parallel to prevent the first molded product from cooling, The boundary surface becomes a unified product. Of course, when a predetermined shape is formed in this way, the molded product is divided into stages and injection molded.
The wall thickness of each molding process is shortened, and even if two molding cycles are totaled, there is no need for a long cycle like flow molding, and molded products can be manufactured using a small injection molding machine. be able to manufacture. In addition, since the forming process is divided into stages, the occurrence of welds is reduced, and even if there are whiskers or welds in the first-order formed crystal, these can be corrected by the first-order form. □In the above example, the core mold (1) and the injection molding machine are fixed and the cavity mold (2) is slid, so the mechanism is not complicated and the amount of movement is small. It also has a relatively small mouth.
以上の説明でに一つσつキャビティ（２／）、（，２，
２）をもったキャビティ型（λ）を用いているが、本発
明ではキャビティが３個のキャビティ型な用いて三爪成
形することも可能である、また上記例では段階的に成形
品の厚さを増加させる成形について説明したが、これを
例えば第３図の如く、投影面積を段階的に増加させて大
型の成形品の製造に使用することも勿論可能である。な
お、複数段階に分けて射出成形する際のキャビティ型の
移動は、上記の摺動に限られるものではなく、回動また
は回転であっても購わない。In the above explanation, one σ cavity (2/), (,2,
Although a cavity mold (λ) with 2) is used, in the present invention, it is also possible to perform three-claw molding by using a cavity mold with three cavities. Although the description has been made of molding in which the thickness is increased, it is of course also possible to use this method to manufacture large molded products by increasing the projected area in stages, as shown in FIG. 3, for example. Note that the movement of the cavity mold during injection molding in multiple stages is not limited to the above-mentioned sliding movement, and may also be rotation or rotation.
１１）・・・第２次のｆＪｙＪ形品
本売品本発明詳述した如き構成スン）らなるものである
から、成形能力に１浪界のあるような／ｈ型の成形機を
用いながら、厚肉σつあるｌ／１＆ま大型σ）成形品を
製造することができ、し力）もそＱつ成形は一般の方法
と特に変わることなくイテなえて、成形サイクルをいた
ずらに増大さセ゛ることカーなく、かつひげやウェルド
（７，）少なし）りＬ枦シσ、）投れた成形品が得られ
る利点がある。11)...Second fJyJ shaped product This invention consists of a structure as described in detail. It is possible to produce thick-walled σ (L/1 & large σ) molded products, and the molding process is no different from the general method, and the molding cycle is unnecessarily increased. There is an advantage that a molded product with no scratches and no welds (7,), and no welds can be obtained.
第１囲い）〜Ｇ）は本発明の製造方法σつ一実施例を示
′Ｔ製造工程の概略的な説明」図、第２図（ま・これに
よって得られた成形品ａＪｖＲｉσ０図、第３図Ｃま他
の例によって製造された成）彩品σ、）旧ｆ市ｉ図であ
る０
（ｉ）・・・コア型
（／／） ・ ・ ・ コ ア（２）・・
・キャビティ型
（２１）−・第１キヤビテイ
（２２）・・・第２キヤビテイ
（１戸・・第１次の成形品1st box) to G) show an example of the manufacturing method σ of the present invention. Figure C and other examples of finished products manufactured by σ,) former f city i figure 0 (i)...Core type (//) ・ ・ ・ Core (2)...
・Cavity mold (21) - 1st cavity (22)... 2nd cavity (1 unit... 1st molded product)
Claims (1)
所定形状の合成樹脂成形品を製造する方法であつ“Ｃ１
単一のコア型を共荊して使用すると共しＣ１該コア型に
ヌｊ応しかつ目的形状を備えた複数個のキャビティを配
設したキャビティ域を使用し、該キャビティ型をコア型
に対し移動自在に設置して、コア型とキャビティ型の一
つのキャビティとを対症、させて第１次の射出成形を？
Ｔない、次いでコア型に第１次成形品をつけたま一他の
キャビティと対応させて第２次またはそれ以降のＩル１
形を行ない、所定形状の成形品を得るようにしたことを
特徴とする合成梅脂成形品の製造方法。"C1" is a method of manufacturing a synthetic resin molded product of a predetermined shape by injection molding a synthetic resin UTF molding material in multiple stages.
A single core mold is used in common, and a cavity region in which a plurality of cavities corresponding to the core mold and having a desired shape are arranged is used, and the cavity mold is turned into a core mold. On the other hand, is it possible to install the core mold and one cavity of the cavity mold in a movable manner and perform the first injection molding?
Then, with the primary molded product attached to the core mold, the second or subsequent moldings are made in correspondence with other cavities.
1. A method for producing a synthetic plum fat molded article, characterized in that a molded article of a predetermined shape is obtained by shaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18555482A JPS5973930A (en) | 1982-10-22 | 1982-10-22 | Manufacture of synthetic resin molded shape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18555482A JPS5973930A (en) | 1982-10-22 | 1982-10-22 | Manufacture of synthetic resin molded shape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5973930A true JPS5973930A (en) | 1984-04-26 |
Family
ID=16172831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18555482A Pending JPS5973930A (en) | 1982-10-22 | 1982-10-22 | Manufacture of synthetic resin molded shape |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5973930A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2565895A1 (en) * | 1984-06-15 | 1985-12-20 | Devi Spa | MACHINE FOR THE MANUFACTURE OF PLASTIC MOLDED ARTICLES, PARTICULARLY HELMETS FOR MOTORCYCLISTS |
| JPS62122726A (en) * | 1985-11-25 | 1987-06-04 | Matsushita Electric Works Ltd | Molding of thick-walled molded part |
| US4784817A (en) * | 1984-09-07 | 1988-11-15 | Tbl Development Corporation | Method of making a container closure |
| JPH01113217A (en) * | 1987-10-27 | 1989-05-01 | Kunimori Kagaku:Kk | Multiple injection molding |
| JPH01142103U (en) * | 1988-03-25 | 1989-09-28 | ||
| JPH02147306A (en) * | 1988-11-30 | 1990-06-06 | Toyoda Gosei Co Ltd | Manufacture of molded body having insert |
| WO1991002640A1 (en) * | 1989-08-14 | 1991-03-07 | Jens Ole Sorensen | Sequentially injected multi-component injection molding |
| US5030406A (en) * | 1989-08-14 | 1991-07-09 | Sorensen Jens Ole | Sequentially injected multi-component shuttle-stack-molding |
| FR2752560A1 (en) * | 1996-08-23 | 1998-02-27 | Lorraine Capsules Metall | Injection mould plastic bottle top |
| KR100708908B1 (en) | 2005-05-25 | 2007-04-18 | 김현태 | The mold for adhesive and molding |
| CN102161223A (en) * | 2011-01-12 | 2011-08-24 | 深圳创维－Rgb电子有限公司 | Injecting mold of bi-color screen-sealing front housing and precise injection molding method |
-
1982
- 1982-10-22 JP JP18555482A patent/JPS5973930A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2565895A1 (en) * | 1984-06-15 | 1985-12-20 | Devi Spa | MACHINE FOR THE MANUFACTURE OF PLASTIC MOLDED ARTICLES, PARTICULARLY HELMETS FOR MOTORCYCLISTS |
| US4784817A (en) * | 1984-09-07 | 1988-11-15 | Tbl Development Corporation | Method of making a container closure |
| JPS62122726A (en) * | 1985-11-25 | 1987-06-04 | Matsushita Electric Works Ltd | Molding of thick-walled molded part |
| JPH0558377B2 (en) * | 1987-10-27 | 1993-08-26 | Kunimori Kagaku Kk | |
| JPH01113217A (en) * | 1987-10-27 | 1989-05-01 | Kunimori Kagaku:Kk | Multiple injection molding |
| JPH01142103U (en) * | 1988-03-25 | 1989-09-28 | ||
| JPH02147306A (en) * | 1988-11-30 | 1990-06-06 | Toyoda Gosei Co Ltd | Manufacture of molded body having insert |
| WO1991002640A1 (en) * | 1989-08-14 | 1991-03-07 | Jens Ole Sorensen | Sequentially injected multi-component injection molding |
| US5030406A (en) * | 1989-08-14 | 1991-07-09 | Sorensen Jens Ole | Sequentially injected multi-component shuttle-stack-molding |
| EP0487625B1 (en) * | 1989-08-14 | 1997-10-08 | SORENSEN, Jens Ole | Sequentially injected multi-component injection molding |
| FR2752560A1 (en) * | 1996-08-23 | 1998-02-27 | Lorraine Capsules Metall | Injection mould plastic bottle top |
| KR100708908B1 (en) | 2005-05-25 | 2007-04-18 | 김현태 | The mold for adhesive and molding |
| CN102161223A (en) * | 2011-01-12 | 2011-08-24 | 深圳创维－Rgb电子有限公司 | Injecting mold of bi-color screen-sealing front housing and precise injection molding method |
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