JP2011037252A - Injection molding device - Google Patents

Injection molding device Download PDF

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Publication number
JP2011037252A
JP2011037252A JP2009205277A JP2009205277A JP2011037252A JP 2011037252 A JP2011037252 A JP 2011037252A JP 2009205277 A JP2009205277 A JP 2009205277A JP 2009205277 A JP2009205277 A JP 2009205277A JP 2011037252 A JP2011037252 A JP 2011037252A
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Japan
Prior art keywords
insert
cooling
fixed
mold
product
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JP2009205277A
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Japanese (ja)
Inventor
Takeo Takeuchi
豪男 竹内
Shigeyuki Kageyama
茂幸 影山
Hisajiro Sakurai
久次郎 桜井
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SANEI MOLD KK
SHINNIHON KANAGATA KOGYO KK
Nitto Kogyo Corp
Original Assignee
SANEI MOLD KK
SHINNIHON KANAGATA KOGYO KK
Nitto Kogyo Corp
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Application filed by SANEI MOLD KK, SHINNIHON KANAGATA KOGYO KK, Nitto Kogyo Corp filed Critical SANEI MOLD KK
Priority to JP2009205277A priority Critical patent/JP2011037252A/en
Publication of JP2011037252A publication Critical patent/JP2011037252A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problems in an injection molding device that it is difficult to obtain a stable product for a long period of time, that it is difficult to increase productivity because it is conventional to clean a die after stopping working for a predetermined time, that it is extremely difficult to keep qualities of a product, and that further it is difficult to mold from different materials and to mold a product having a size over a given limit length. <P>SOLUTION: Conventional insert dies at a fixing side and at a moving side facing each other to form a cavity part are equipped with a heating means, a cooling insert die at a fixing side separably connecting to the insert die at the fixing side and a cooling insert die at moving side separably connecting to the insert die at the moving are equipped with a cooling means, and a temperature around a cavity part is kept under best conditions for connection and separation of each insert die and each cooling insert die, whereby improvement of qualities of an injection molded product and shortening of a time for maintenance of a device can be attained. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明はプラスティック、金属、その他の加熱により溶融可能な原材料を使用して射出成型を行う際に、金型の温度制御と金型内部のガス抜きを並行して行うことによって、成型品の良好な状態を確保する射出成型装置に関するものである。      In the present invention, when injection molding is performed using plastic, metal, or other raw material that can be melted by heating, mold temperature control and degassing inside the mold are performed in parallel to improve the quality of the molded product. The present invention relates to an injection molding apparatus that ensures a safe state.

あらかじめ用意した金型に溶融原材料を充填して成型品を得る射出成型技術は長らく使用されており、近来の大量生産技術に必要欠くべからざる技術として、年々各種の技術改良が繰り返され、金型の温度管理に関しても、良好な仕上がりの製品を長時間にわたって連続して成形するための考察が試みられている。      Injection molding technology for obtaining molded products by filling molten raw materials into molds prepared in advance has been used for a long time, and as a technology that is indispensable for modern mass production technology, various technological improvements have been repeated year by year. With regard to the temperature control, it has been attempted to consider forming a product having a good finish continuously over a long period of time.

そのような努力の結果は下記の特許文献に見受けられるが、いずれの場合にも実行においては解決されない種々の問題点を包含している。
特開平7−195472公報 特開平8−290452公報
The results of such efforts can be found in the following patent literature, but in any case encompass various problems that cannot be solved in practice.
JP-A-7-195472 JP-A-8-290452

本件出願人の一である有限会社サンエイ・モールドは、過去において特許第4085182号及び特許第4096327号なる特許権を獲得し、射出成型の際の型内部の有効なガス抜き手段を世に提供した。これらの技術により、成型機械の連続稼働時間は延長され、メンテナンスの回数を驚異的に減らすことに成功し、さらに従来材料による射出成型品の表面仕上げの著しい改良を確保することができた。      Sanei Mold Co., Ltd., one of the applicants of the present application, has acquired patents No. 4085182 and No. 4096327 in the past, and provided an effective gas venting means inside the mold during injection molding. With these technologies, the continuous operation time of the molding machine has been extended, the number of maintenance operations has been dramatically reduced, and a significant improvement in the surface finish of injection molded products using conventional materials has been ensured.

しかしながら、これまでは製造不可能と考えられていた製品の製造もしくは使用不可能と考えられていた材料の使用を射出成型加工に適用すべしという要求は日に日に増加している。      However, there is an ever-increasing demand to apply to injection molding the use of materials that were previously considered unmanufacturable as products that could not be manufactured or used.

本件発明者らは、キャビティー内のガスを有効に抜去する技術は上記二件の特許によって確立されているが、種々の制約によってこれまで射出成型では製造できなかった製品や、射出成型で使用することが困難であった材料を、自由に選択して組み合わせより広い分野で射出成型技術を使用するためには、確実なガス抜きと並行して安価な手段で金型の適切な温度管理を行い得る技術を使用する必要があるという結論に到達した。      The inventors of the present invention have established the technology for effectively removing the gas in the cavity by the above two patents. In order to use injection molding technology in a wide range of fields by freely selecting and combining materials that were difficult to perform, appropriate temperature control of the mold by inexpensive means in parallel with reliable degassing A conclusion has been reached that it is necessary to use techniques that can be done.

しかしながら、現在提供されている作業時の金型温度管理の技術内容は、いずれも金型を余熱するという発想の域を出ることなく、それがため射出成型作業に十分な結果を得ることができない状態が続いており、また特殊な冷媒を使用したり特殊な冷却装置を適用したりする方向への追及のみが重要視された結果、金型の温度管理は費用のかかる割の合わない装置を生み出す結果に終わっている。      However, the technical contents of mold temperature management at the time of work currently provided do not go out of the idea of preheating the mold, so that sufficient results cannot be obtained for injection molding work. As a result, it was important to pursue the direction of using special refrigerants or applying special cooling devices. The result is produced.

本発明においては、金型の冷却には水を、また金型の加熱には電気ヒーターを使用することによって、安価かつ確実に金型の温度制御をおこなうことが可能にした。      In the present invention, water temperature is used for cooling the mold, and an electric heater is used for heating the mold, thereby making it possible to control the temperature of the mold inexpensively and reliably.

金型の主要部は固定側入子とそれに対向する可動側入子によって構成され、両者の間に穿設された凹陥部に溶融した材料を充填して凹陥部内に成型製品を得るものであるが、これら二つの入子にそれぞれ入子を加熱するための加熱手段を埋設する。      The main part of the mold is composed of a fixed side insert and a movable side insert opposite thereto, and a melted material is filled in a recess formed between them to obtain a molded product in the recess. However, a heating means for heating the inserts is buried in each of these two inserts.

さらに、固定側入子には固定側冷却用入子を分離可能な状態で当接させ、可動側入子には可動側冷却用入子を分離可能な状態に当接させる。これら二つの冷却用入子には水などを流通させることによる冷却手段を設置する。      Further, the fixed-side insert is brought into contact with the fixed-side cooling insert in a separable state, and the movable-side insert is brought into contact with the movable-side insert in a separable state. These two cooling inserts are provided with cooling means by circulating water or the like.

加熱手段と冷却手段を稼働させ、金型を合わせ、材料を充填し、金型を分離させて製品を排出する射出成型機の動作にあわせて、金型の温度を製品の仕上がりにもっとも望ましい状態に維持することによって、長時間の連続運転が可能な射出成型装置を得る。      The temperature of the mold is most desirable for the finished product in accordance with the operation of the injection molding machine that operates the heating means and cooling means, matches the mold, fills the material, separates the mold and discharges the product Thus, an injection molding apparatus capable of continuous operation for a long time is obtained.

本発明によると、電熱と水を利用して安価かつ簡単確実に金型の温度制御をおこなうことができ、製品の安定した仕上がりとメンテナンス時間の短縮を可能とした射出成型装置を得ることができる効果がある。      According to the present invention, it is possible to control the temperature of a mold at low cost, easily and reliably using electric heat and water, and it is possible to obtain an injection molding apparatus capable of stably finishing a product and shortening maintenance time. effective.

本発明の金型を閉じた状態の断面図である。It is sectional drawing of the state which closed the metal mold | die of this invention. 図1に示すものの固定側入子と固定側冷却用入子が分離された状態の断面図である。FIG. 2 is a cross-sectional view of the state shown in FIG. 1 in which a fixed side insert and a fixed side cooling insert are separated. 図2に示すものの可動側入子と可動側冷却用入子が分離された状態の断面図である。FIG. 3 is a cross-sectional view showing a state in which the movable side insert and the movable side cooling insert shown in FIG. 2 are separated. 図3に示すものの固定側入子と可動側入子が分離した状態の断面図である。FIG. 4 is a cross-sectional view of the state shown in FIG. 3 in which a fixed side insert and a movable side insert are separated. 図4に示すもののキャビティー部内の製品とそれに連続するランナー部内の樹脂を排出する状態の断面図である。It is sectional drawing of the state which discharges the product in the cavity part of what is shown in FIG. 4, and resin in the runner part continuous with it.

本発明においては固定側と可動側の入子を対面させ、固定側入子と可動側入子にはそれぞれ加熱手段を設置し、固定側入子に固定側冷却用入子をまた可動側入子に可動側冷却用入子をそれぞれ当接させるとともにそれぞれの冷却用入子に冷却手段を設置し、固定側冷却用入子、固定側入子、可動側入子、可動側冷却用入子を一体に締め上げて射出成型による製品を得るためのキャビティー部を形成できるようにするとともに、それら入子を分離可能にして、加熱手段と冷却手段の操作と入子の合体分離によりキャビティー部周囲の温度を制御する。      In the present invention, the fixed side and the movable side inserts face each other, heating means are installed on the fixed side insert and the movable side inserts, respectively, and the fixed side cooling insert is also inserted into the fixed side insert. The movable side cooling inserts are brought into contact with the child, and cooling means are installed in each cooling insert. The fixed side cooling insert, the fixed side insert, the movable side insert, and the movable side cooling insert. It is possible to form a cavity part to obtain a product by injection molding by tightening together, making the inserts separable, and operating the heating means and cooling means and combining and separating the inserts Control the ambient temperature.

図面に従って本発明の実施例を説明すると、1は可動側本体2に固定された可動側入子で実施例の場合には電熱を利用した可動側加熱手段3を備えている。4は固定側本体5にこていされた固定側入子で実施例の場合には電熱を利用した固定側加熱手段6を備えている。      An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a movable side insert fixed to a movable side main body 2, and in the case of the embodiment, includes a movable side heating means 3 utilizing electric heat. Reference numeral 4 denotes a fixed-side insert attached to the fixed-side main body 5, and in the case of the embodiment, includes a fixed-side heating means 6 using electric heat.

7は可動側本体2に分離可能に接触する可動側背板に固定され且つ可動側入子1に分離可能に接触するように配置された可動側冷却用入子で、実施例の場合には冷却用の水を流通させることによる可動側冷却手段9を備えている。10は固定側本体5に分離可能に接触する固定側背板11に固定され且つ固定側入子4に分離可能に接触するように配置された固定側冷却用入子で、実施例の場合には冷却用の水を流通させることによる固定側冷却手段12を備えている。      Reference numeral 7 denotes a movable side cooling insert fixed to the movable side back plate that contacts the movable side body 2 in a separable manner and arranged to contact the movable side insert 1 in a separable manner. A movable-side cooling means 9 is provided by circulating cooling water. Reference numeral 10 denotes a fixed-side cooling insert fixed to the fixed-side back plate 11 detachably contacting the fixed-side main body 5 and arranged to contact the fixed-side insert 4 detachably. Includes a fixed-side cooling means 12 by circulating cooling water.

固定側背板11には固定側取付板13が固定され、固定側取付板13により支持され固定用取付板13、固定側背板11、固定側冷却用入子10および固定側入子4を貫通するスプルブッシュ14に一次スプル15、一次ゲート16および二次スプル17が連続的に穿設されており、二次スプル17の端部は可動側入子1と固定側入子4により形成されたランナー部18に開口し、ランナー部18は二次ゲート19を介して可動側入子1と固定側入子4により形成されたキャビティー部20に接続されている。本発明においては、一次スプル15と二次スプル17の間に一次ゲート16が設けられており、一次ゲート16によって一次スプル15の内径を絞り込むことにより、前述の特許第4085182号及び特許第4096327号の応用が実施されている。これと同様の応用はキャビティー部20に連続するガス吸引溝21にも適用されている。      A fixed-side mounting plate 13 is fixed to the fixed-side back plate 11 and is supported by the fixed-side mounting plate 13, and the fixing-side mounting plate 13, the fixed-side back plate 11, the fixed-side cooling insert 10 and the fixed-side insert 4 are arranged. A primary sprue 15, a primary gate 16, and a secondary sprue 17 are continuously drilled in the sprue bush 14 that penetrates, and the end of the secondary sprue 17 is formed by the movable side insert 1 and the fixed side insert 4. The runner portion 18 is connected to a cavity portion 20 formed by the movable side insert 1 and the fixed side insert 4 via a secondary gate 19. In the present invention, the primary gate 16 is provided between the primary sprue 15 and the secondary sprue 17. By narrowing the inner diameter of the primary sprue 15 by the primary gate 16, the above-mentioned Japanese Patent Nos. 4085182 and 4096327 are disclosed. Application has been implemented. The same application as this is applied to the gas suction groove 21 continuing to the cavity portion 20.

22は可動側取付板23に対面する下エジェクター板24に載置され上エジェクター板25によって支持されるランナー押出ピンで、可動側背板8、可動側冷却用入子7および可動側入子1を貫通したそのガス抜き端部26はランナー18に対面しており、ランナー部18のガス抜きとランナー部18充填された材料の排出を行うものである。また図中27は可動側入子1に設置された鋳抜ピンである。28は押出ピンで、ランナー押出ピン22と共働して、キャビティー部20に出来上がった製品を金型の外部へ排出するために動作する。      Reference numeral 22 denotes a runner push-out pin which is placed on the lower ejector plate 24 facing the movable side mounting plate 23 and supported by the upper ejector plate 25. The movable side back plate 8, the movable side cooling insert 7 and the movable side insert 1 The degassing end portion 26 penetrating through the surface faces the runner 18, and degass the runner portion 18 and discharges the material filled in the runner portion 18. In the figure, reference numeral 27 denotes a cast pin installed in the movable side insert 1. Reference numeral 28 denotes an extruding pin that operates in cooperation with the runner extruding pin 22 to discharge the product completed in the cavity portion 20 to the outside of the mold.

装置の動作は、図1に示した金型締め上げの状態で一次スプル15から溶融した材料を充填し、キャビティー部20に製品を完成したのち、図2のごとくまず固定側入子4と固定側冷却用入子10を分離する。      The operation of the apparatus is as follows. After the mold sprung state shown in FIG. 1 is filled with the molten material from the primary sprue 15 and the product is completed in the cavity portion 20, first, as shown in FIG. The fixed cooling insert 10 is separated.

次に図3のごとく可動側入子1と可動側冷却用入子7を分離させ、次いで図4のごとく固定側入子4と可動側入子1を完全に分離させて製品を露出させ、ランナー押出ピン22と押出ピン28によって製品を外部へ取り出す。      Next, the movable side insert 1 and the movable side cooling insert 7 are separated as shown in FIG. 3, and then the fixed side insert 4 and the movable side insert 1 are completely separated as shown in FIG. The product is taken out by the runner push pin 22 and the push pin 28.

これら動作の間、各入子と各冷却用入子が接触している場合には入子の温度上昇が抑制され、それらが互いに分離されると入子の温度は上昇する。それに加えて入子の加熱手段の制御と冷却用入子の冷却手段の制御をおこなうことにより、材料充填と製品冷却に関するもっとも望ましい入子の温度を確保しそれを維持することができる。      During these operations, when each nest and each cooling nest are in contact, the temperature rise of the nest is suppressed, and when they are separated from each other, the temperature of the nest rises. In addition, by controlling the heating means of the insert and the cooling means of the cooling insert, the most desirable insert temperature for material filling and product cooling can be secured and maintained.

本発明によると確実なガス抜きを行うことと並行して金型の入子の部分の温度を自由に制御することができるため、溶融している材料であればいかなる材料も射出成型が可能となり、製品全体の仕上がり、製品表面の完璧さが容易に達成できるので、射出成型による大量生産のすべてに本発明を適用することができる。      According to the present invention, it is possible to freely control the temperature of the nesting part of the mold in parallel with the reliable degassing, so any material that is molten can be injection molded. Since the finish of the entire product and the perfection of the product surface can be easily achieved, the present invention can be applied to all mass production by injection molding.

本実施例に示した構造の射出成型機によって、現在使用されている殆どの材料、ならびにそれらに混入される各種の付加材料を使用して、詳細な温度管理データを取得したが、単に製品表面および裏面の仕上がりが最も望ましく制御できるだけでなく、これまでは成型困難と考えられていた材料や成型不可能とされていた大きさや厚さの製品に関しても、本発明を適用することによって成型が確実に可能になることが確認できた。      With the injection molding machine of the structure shown in this example, detailed temperature management data was obtained using most of the materials currently used and various additional materials mixed in them, but the product surface was simply In addition, the finish of the back surface can be controlled most desirably, and the present invention can be used to ensure the molding of materials that have been thought to be difficult to mold and products of size and thickness that were previously considered difficult to mold. It was confirmed that it would be possible.

1 可動側入子
2 可動側本体
3 可動側加熱手段
4 固定側入子
5 固定側本体
6 固定側加熱手段
7 可動側冷却用入子
8 可動側背板
9 可動側冷却手段
10 固定側冷却用入子
11 固定側背板
12 固定側冷却手段
13 固定側取付板
14 スプルブッシュ
15 一次スプル
16 一次ゲート
17 二次スプル
18 ランナー部
19 二次ゲート
20 キャビティー部
21 ガス吸引溝
22 ランナー押出ピン
23 可動側取付板
24 下エジェクター板
25 上エジェクター板
26 ガス抜き端部
27 鋳抜きピン
28 押出ピン
DESCRIPTION OF SYMBOLS 1 Movable side insert 2 Movable side main body 3 Movable side heating means 4 Fixed side insert 5 Fixed side main body 6 Fixed side heating means 7 Movable side cooling insert 8 Movable side back plate 9 Movable side cooling means 10 For fixed side cooling Insert 11 Fixed side back plate 12 Fixed side cooling means 13 Fixed side mounting plate 14 Sprue bush 15 Primary spru 16 Primary gate 17 Secondary spru 18 Runner part 19 Secondary gate 20 Cavity part 21 Gas suction groove 22 Runner push pin 23 Movable side mounting plate 24 Lower ejector plate 25 Upper ejector plate 26 Degassing end portion 27 Casting pin 28 Extrusion pin

Claims (2)

射出成型装置において、互いに対面してキャビティー部を形成する可動側入子と固定側入子にそれぞれ加熱手段を設け、可動側入子に分離可能に当接する可動側冷却用入子と固定側入子に分離可能に当接する固定側冷却用入子にそれぞれ冷却手段を設けたことを特徴とする射出成型装置。      In the injection molding apparatus, a movable side cooling insert and a fixed side, which are provided with heating means respectively on the movable side insert and the fixed side insert that face each other to form a cavity portion, are detachably contacted with the movable side insert. An injection molding apparatus characterized in that a cooling means is provided for each fixed side cooling insert that comes into contact with the insert in a separable manner. 加熱手段が電熱であり冷却手段が水であることを特徴とする請求項1記載の射出成型装置。      2. An injection molding apparatus according to claim 1, wherein the heating means is electric heat and the cooling means is water.
JP2009205277A 2009-08-14 2009-08-14 Injection molding device Pending JP2011037252A (en)

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JP2009205277A JP2011037252A (en) 2009-08-14 2009-08-14 Injection molding device

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