JPS62124920A - Injection nozzle of injection molding machine - Google Patents
Injection nozzle of injection molding machineInfo
- Publication number
- JPS62124920A JPS62124920A JP26632385A JP26632385A JPS62124920A JP S62124920 A JPS62124920 A JP S62124920A JP 26632385 A JP26632385 A JP 26632385A JP 26632385 A JP26632385 A JP 26632385A JP S62124920 A JPS62124920 A JP S62124920A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- mold
- coil
- coil block
- nozzle body
- 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.)
- Granted
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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/74—Heating or cooling of the injection unit
-
- 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/20—Injection nozzles
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】
（産業上の利用分野）
本発明は、金型に溶融樹脂を射出する射出成形機の射出
ノズル、特にオープン型のノズルに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an injection nozzle for an injection molding machine that injects molten resin into a mold, particularly an open type nozzle.
（従来の技術）
オープン型の射出ノズルでも、ノズル先端部の加熱／冷
却で熱的に樹脂を溶融／同化させることによって、成形
サイクルに同期してノズルを開閉させることが可能であ
る。短い成形サイクル中で樹脂の溶融／固化を応答性よ
く行なうためには、ノズル先端部の樹脂流路壁の昇温速
度、降温速度を上げる必要がある。(Prior Art) Even with an open injection nozzle, it is possible to open and close the nozzle in synchronization with the molding cycle by thermally melting/assimilating the resin by heating/cooling the nozzle tip. In order to melt/solidify the resin with good responsiveness during a short molding cycle, it is necessary to increase the rate of temperature rise and temperature drop of the resin channel wall at the nozzle tip.
昇温速度と降温速度をともに上げるためには発熱体の熱
容量Ｗ１つまり体積をできるだけ小さくする。昇温速度
のみを上げるためには単位時間当りの発熱景Ｑ□を上げ
る。電磁誘導加熱方式では周波数、コイル巻数、電流を
高くすればよい。一方、降温速度については、発熱体の
冷却に冷却媒体を使用しない限り放熱にのみ頼ることに
なるが、この場合発熱体より低温の物体との接触面積、
温度差、熱伝達係数によって決まる。金型とノズルの関
係では、降温速度は金型との接触面積、温度差で決まっ
てしまう。In order to increase both the temperature increase rate and the temperature decrease rate, the heat capacity W1, that is, the volume, of the heating element is made as small as possible. In order to increase only the temperature increase rate, increase the heat generation scene Q□ per unit time. With the electromagnetic induction heating method, the frequency, number of coil turns, and current can be increased. On the other hand, regarding the rate of temperature decrease, unless a cooling medium is used to cool the heating element, it will rely solely on heat radiation; in this case, the area of contact with an object that is cooler than the heating element,
Determined by temperature difference and heat transfer coefficient. Regarding the relationship between the mold and the nozzle, the rate of temperature drop is determined by the contact area with the mold and the temperature difference.
上記の観点から、ノズル先端部の樹脂通路壁を導電性の
発熱体で形成し、その外周にセラミック円筒体を設けて
、前記ノズル先端部を構成すると共に、このノズル先端
部の外周に電磁誘導コイルを巻回して配設した射出ノズ
ルが開発されている（特開昭５８−３９４２８号公報参
照）Ｑ
（発明が解決しようとする問題点）
一般に、射出ノズルは、温度（２００〜４００℃）樹脂
圧力（１〜２．５ ｔｏＶｄ） 、ノズルタッチ力（２
〜３ｔｏｎｆ ）等、極めて過酷な環境下で使用される
ために高い信頼性が要求されるが、前記従来の射出ノズ
ルでは、セラミック材料を使用したため、衝撃強度が不
足する。また裏作が困難であると共に、発熱体の発熱時
の膨張を抑えることができず、セラミック材料が発熱体
から外れる。更に、昇温速度は速いが、その割に冷却に
時間がかかシ、冷却効率が低いと込う不都合があった。From the above point of view, the resin passage wall at the nozzle tip is formed of an electrically conductive heating element, and a ceramic cylindrical body is provided on the outer periphery of the resin passage to constitute the nozzle tip. An injection nozzle in which a coil is wound has been developed (see Japanese Unexamined Patent Publication No. 58-39428). Resin pressure (1 to 2.5 toVd), nozzle touch force (2
High reliability is required because the injection nozzle is used under extremely harsh environments such as (3 tonf), but the conventional injection nozzle lacks impact strength because it uses a ceramic material. In addition, it is difficult to prepare the ceramic material and the expansion of the heating element during heat generation cannot be suppressed, causing the ceramic material to separate from the heating element. Furthermore, although the temperature rise rate is fast, cooling takes a long time and the cooling efficiency is low.
（問題点を解決するための手段）
本発明の射出成形機の射出ノズルは、固定プラテン又は
該プラテンに装着された金型に、ノズル挿入孔とその周
囲に巻回された電磁誘導コイルとを中心部に設けた非磁
性材製のコイルブロックを装着し、該コイルブロックの
ノズル挿入孔を、ノズル本体を嵌挿させて金型にノズル
タッチ可能に形成したことを特徴としており１、かかる
構成によって、ノズル本体の放熱効果を向上させ、冷媒
による強制冷却とも可能にして、冷却効率を確実に高め
ることができるようにしたものである。(Means for Solving the Problems) The injection nozzle of the injection molding machine of the present invention has a nozzle insertion hole and an electromagnetic induction coil wound around the nozzle insertion hole in a fixed platen or a mold attached to the platen. A coil block made of a non-magnetic material is installed in the center, and the nozzle insertion hole of the coil block is formed so that the nozzle body can be inserted into the nozzle and the nozzle can be touched to the mold. This improves the heat dissipation effect of the nozzle body and enables forced cooling using a refrigerant, thereby making it possible to reliably improve cooling efficiency.
（実施例）
以下本発明の一実施例を第１図に沿い説明する０
図中１は固定プラテン、２は該プラテン１に装着された
金型である。(Embodiment) An embodiment of the present invention will be described below with reference to FIG. 1. In the figure, 1 is a fixed platen, and 2 is a mold attached to the platen 1.
３はコイルブロックで、電磁誘導コイル４が外周に一重
又は多重巻きで巻回されて装着されたボビン５と、コイ
ル収納空間６を設けるよう前記ボビン５に装着されたキ
ャップ７とから構成されている。ボビン５の中心部には
ノズル挿入孔８が穿設されている。一方、キャップ７に
は冷却水孔９が穿設されている。そして、ボビ１５及び
キャップ７は非磁性材で裏作されてｈる。具体的には、
ステンレス鋼、銅合金等の非磁性金属材料又はセラミッ
ク等の非磁性非金属材料があるが、強度及び熱伝導率の
点でステンレス鋼が好適である。Reference numeral 3 denotes a coil block, which is composed of a bobbin 5 on which an electromagnetic induction coil 4 is wound in single or multiple turns around the outer periphery, and a cap 7 attached to the bobbin 5 so as to provide a coil storage space 6. There is. A nozzle insertion hole 8 is bored in the center of the bobbin 5. On the other hand, a cooling water hole 9 is bored in the cap 7. The bobbin 15 and the cap 7 are lined with a non-magnetic material. in particular,
There are non-magnetic metal materials such as stainless steel and copper alloys, and non-magnetic non-metal materials such as ceramics, but stainless steel is preferred in terms of strength and thermal conductivity.
このコイルブロック３は、固定プラテン１を貫通して金
型２に取付ボルトｌＯにより着脱可能に装着されている
。該ブロック中心部のノズル挿入孔８は、後述する射出
ノズル１１を嵌挿させて金型２にノズルタッチ可能に形
成されている。This coil block 3 passes through the fixed platen 1 and is removably attached to the mold 2 with a mounting bolt IO. The nozzle insertion hole 8 at the center of the block is formed so that an injection nozzle 11, which will be described later, can be inserted into the nozzle insertion hole 8 and the nozzle can be touched to the mold 2.
ｌユはノズル本体で、可塑化シリンダ１２の先端に装着
されており、該ノズル本体１１には熱電対等の温度上ン
サ１３が埋設されている。A nozzle body is attached to the tip of the plasticizing cylinder 12, and a temperature sensor 13 such as a thermocouple is embedded in the nozzle body 11.
温度上ンサ１３に接続したリード線は、ノズル表面に銀
ロー付等で密着性良くかつ強固に固定されている。The lead wire connected to the temperature sensor 13 is firmly and tightly fixed to the nozzle surface with silver brazing or the like.
尚、コイルブロック３をボビン５とキャップ７で構成し
た例につき説明したが、第２図に示す如くコイルブロッ
ク３をアルミ又は銅合金の鋳込み方式による一体物で構
成し、ノズル挿入孔８の周囲に巻回状態で電磁誘導コイ
ル４を埋設すると共に、図示しないが該コイル４の周囲
に冷却水孔９を設けても同効である〇
また、コイルブロック３を金型１に装着した例につき説
明したが、第２図及び第３図に示す如くコイルブロック
３を固定プラテンｌの金型側孔部内に嵌合し、かつ、金
型２で抜は止めして該プラテジ１に装着しても同効であ
る。この場合、第２図に示す如くコイルブロック３と冷
却体（固定プラテン１．金型２ンとの接触面積が大きけ
れば、冷却水孔９を設けなくてもよい。Although the example in which the coil block 3 is composed of the bobbin 5 and the cap 7 has been described, the coil block 3 is composed of an integral body made of aluminum or copper alloy by casting, as shown in FIG. The same effect can be obtained by burying the electromagnetic induction coil 4 in a wound state and providing a cooling water hole 9 around the coil 4 (not shown).Also, regarding an example in which the coil block 3 is attached to the mold 1, As explained above, as shown in FIGS. 2 and 3, the coil block 3 is fitted into the mold side hole of the fixed platen L, and the mold 2 prevents the coil block 3 from being removed, and the coil block 3 is attached to the platen 1. has the same effect. In this case, if the contact area between the coil block 3 and the cooling body (fixed platen 1, mold 2) is large as shown in FIG. 2, the cooling water holes 9 may not be provided.
（作用）
電磁誘導コイル４に通電すると、コイルブロック３のノ
ズル挿入孔８内に嵌挿されたノズル本体１１は電磁誘導
加熱で速かに昇温される〇この場合、ノズル本体１１を
金型２とのノズルタッチ位置から後退させれば、ノズル
本体１１での昇温部分が変わり、ノズル先端を効率よく
昇温させることかできる。このため、ノズル本体１１内
の固結樹脂が確実に溶融されてノズル本体１１が開くか
ら、樹脂の全型***出が行なえる。(Function) When the electromagnetic induction coil 4 is energized, the temperature of the nozzle body 11 inserted into the nozzle insertion hole 8 of the coil block 3 is rapidly raised by electromagnetic induction heating. In this case, the nozzle body 11 is placed in a mold. If the nozzle is moved back from the nozzle touch position with 2, the portion of the nozzle body 11 that is heated changes, and the temperature of the nozzle tip can be raised efficiently. Therefore, the solidified resin within the nozzle body 11 is reliably melted and the nozzle body 11 is opened, so that resin can be injected into the entire mold.
コイルブロック３は金型２（又は固定プラテン１）に装
着されており、冷却水孔９を設けることができるように
、ノズル本体１１に装着されたものに比べて大きく製作
されているから、金型２（又は、金型２及び固定プラテ
ン１）と広い面積で接触している。ノズル本体１１は、
このコイルブロック３に囲繞されてこれと広い面積で接
触すると共に、金型２と接触しているから、放熱効率は
高い。加えてコイルブロック３に冷却水を通すことで電
磁誘導コイル４及びノズル本体〕。ｌを強制的に冷却し
うる。従って、ノズル本体１１は速かに降温されるなめ
、ノズル本体１１内の樹脂が速かにかつ確実に固結され
、ノズル本体１工は閉じる。The coil block 3 is attached to the mold 2 (or the fixed platen 1) and is made larger than the one attached to the nozzle body 11 so that the cooling water holes 9 can be provided. It is in contact with the mold 2 (or the mold 2 and the fixed platen 1) over a wide area. The nozzle body 11 is
Since it is surrounded by and in contact with this coil block 3 over a wide area, and also in contact with the mold 2, the heat dissipation efficiency is high. In addition, by passing cooling water through the coil block 3, the electromagnetic induction coil 4 and the nozzle body]. l can be forcibly cooled down. Therefore, the temperature of the nozzle body 11 is quickly lowered, so that the resin in the nozzle body 11 is quickly and reliably solidified, and the nozzle body 1 is closed.
ノズル本体１１の昇温制御及び降温板温度維持は温度セ
ンサ１３を使用した電磁誘導コイル４による加熱調節に
行なわれる。The temperature increase control of the nozzle body 11 and the maintenance of the temperature drop plate temperature are performed by heating adjustment by the electromagnetic induction coil 4 using the temperature sensor 13.
（発明の効果）
以上の通り本発明によれば、固定プラテン又は該プラテ
ンに装着された金型にコイルブロックを装着し、該ブロ
ックを、強制冷却装置を組み込めるように大型化して金
型等の冷却体と広い面積で接触させろと共に、前記コイ
ルブロックと広い面積で接触するよう該ブロック内にノ
ズル本体を嵌挿させるため、ノズル本体を、金型及びコ
イルブロックとの接触による高め放熱効果で速かに降温
させることができると共に、ノズル昇温部分を変えなが
ら電磁誘導加熱でノズル本体を速かに昇温できる。この
ため、ノズル本体を速かに、かつ精度良く開閉できる。(Effects of the Invention) As described above, according to the present invention, a coil block is attached to a fixed platen or a mold attached to the platen, and the block is enlarged so as to be able to incorporate a forced cooling device. In order to make contact with the cooling body over a wide area and to fit the nozzle body into the coil block so as to make contact with the coil block over a wide area, the nozzle body can be quickly dissipated due to the high heat dissipation effect caused by contact with the mold and the coil block. Not only can the temperature be lowered rapidly, but also the temperature of the nozzle body can be rapidly raised by electromagnetic induction heating while changing the heated portion of the nozzle. Therefore, the nozzle body can be opened and closed quickly and accurately.
また、コイルブロックの固定−１１配置により、スプル
ーレスの金型にも対応できると共に、固定プラテンｌ！
１ｊ配置では固定プラテンの中心孔部を大幅に小さくし
て剛性の向上を図れ、かつ、金型σ１１１のブロック取
付は加工を不要にできる０また、ノズル先端径を小さく
することができるから、マルチノズル式射出装置（第３
図参照）に有効である。In addition, the fixed arrangement of the coil block allows it to be used with sprue-less molds, and the fixed platen l!
With the 1j arrangement, the center hole of the fixed platen can be significantly reduced to improve rigidity, and machining is not required for the block installation of the mold σ111.In addition, the nozzle tip diameter can be reduced, making it possible to improve the rigidity of the fixed platen. Nozzle injection device (3rd
(see figure).
第１図、第２図、第３図は本発明の相異なる実施例を示
す概略的な断面図である。
１・・・固定プラテン、２・・・金型、３・・・コイル
ブロック、４・・・電磁誘導コイル、５・・・ボビン、
６・・・コイル収納空間、７・・・キャップ、８・・・
ノズル挿入孔、９・・・冷却水孔、１０・・・取付ボル
ト、１１・・・ノズル本体、１２・・・可塑化シリンダ
、１３・・・温度センサ。1, 2 and 3 are schematic cross-sectional views showing different embodiments of the invention. 1... Fixed platen, 2... Mold, 3... Coil block, 4... Electromagnetic induction coil, 5... Bobbin,
6...Coil storage space, 7...Cap, 8...
Nozzle insertion hole, 9... Cooling water hole, 10... Mounting bolt, 11... Nozzle body, 12... Plasticizing cylinder, 13... Temperature sensor.
Claims (1)
ル挿入孔とその周囲に巻回された電磁誘導コイルとを中
心部に設けた非磁性材製のコイルブロックを装着し、該
コイルブロックのノズル挿入孔を、ノズル本体を嵌挿さ
せて金型にノズルタッチ可能に形成したことを特徴とす
る射出成形機の射出ノズル。A coil block made of a non-magnetic material having a nozzle insertion hole and an electromagnetic induction coil wound around the nozzle insertion hole in the center is attached to a fixed platen or a mold attached to the platen, and the nozzle of the coil block is An injection nozzle for an injection molding machine, characterized in that an insertion hole is formed so that a nozzle body can be inserted into the nozzle and the nozzle can be touched to a mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26632385A JPS62124920A (en) | 1985-11-27 | 1985-11-27 | Injection nozzle of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26632385A JPS62124920A (en) | 1985-11-27 | 1985-11-27 | Injection nozzle of injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62124920A true JPS62124920A (en) | 1987-06-06 |
| JPH0156888B2 JPH0156888B2 (en) | 1989-12-01 |
Family
ID=17429324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26632385A Granted JPS62124920A (en) | 1985-11-27 | 1985-11-27 | Injection nozzle of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62124920A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6458518A (en) * | 1987-08-31 | 1989-03-06 | Fanuc Ltd | Nozzle apparatus of injection molding machine |
| JPH03126609U (en) * | 1990-03-31 | 1991-12-20 | ||
| CN105946173A (en) * | 2016-05-27 | 2016-09-21 | 陈思 | Plastic injection equipment |
| CN106064442A (en) * | 2016-05-27 | 2016-11-02 | 陈思 | Plastic cement injection device |
-
1985
- 1985-11-27 JP JP26632385A patent/JPS62124920A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6458518A (en) * | 1987-08-31 | 1989-03-06 | Fanuc Ltd | Nozzle apparatus of injection molding machine |
| JPH03126609U (en) * | 1990-03-31 | 1991-12-20 | ||
| CN105946173A (en) * | 2016-05-27 | 2016-09-21 | 陈思 | Plastic injection equipment |
| CN106064442A (en) * | 2016-05-27 | 2016-11-02 | 陈思 | Plastic cement injection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0156888B2 (en) | 1989-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0433253B1 (en) | ||
| WO2003011550A2 (en) | Method for molding a product and a mold used therein | |
| JPS6378720A (en) | Molding die | |
| JPH0559559B2 (en) | ||
| JPS62124920A (en) | Injection nozzle of injection molding machine | |
| JP3896461B2 (en) | Precision mold | |
| JPH035289B2 (en) | ||
| EP0920969A1 (en) | Injection molding means | |
| JP6953441B2 (en) | Mold heating method and equipment | |
| JP2534609B2 (en) | Injection mold probe and runnerless injection molding equipment | |
| CN106028493A (en) | 3D printer extrusion device and heating device thereof | |
| JPH05245885A (en) | Injection molding probe | |
| JPH1029215A (en) | Mold for molding plastic product and manufacture of the mold | |
| JPS62124919A (en) | Injection nozzle of injection molding machine | |
| CN109877296A (en) | Electromagnetic drive low pressure casting forms heat balance device | |
| JPH11348041A (en) | Synthetic resin molding die, and method for heating and cooling it | |
| JPS61121916A (en) | Mold for molding | |
| JPH0810898A (en) | Device for heating metallic mold for casting | |
| US4605054A (en) | Casting apparatus including a conductor for electromagnetic induction heating | |
| JPH04173313A (en) | Mold for injection molding and injection molding method using said mold | |
| US20240190058A1 (en) | Injection molding machine | |
| JPH1157972A (en) | Pressure casting device | |
| JPS625621A (en) | Cooler of liquid-cooled coil | |
| ES2146687T3 (en) | PROCEDURE FOR MANUFACTURING AN INJECTION MOLDING NOZZLE. | |
| JPH039299Y2 (en) |