JPH0156888B2 - - Google Patents
Info
- Publication number
- JPH0156888B2 JPH0156888B2 JP26632385A JP26632385A JPH0156888B2 JP H0156888 B2 JPH0156888 B2 JP H0156888B2 JP 26632385 A JP26632385 A JP 26632385A JP 26632385 A JP26632385 A JP 26632385A JP H0156888 B2 JPH0156888 B2 JP H0156888B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- mold
- coil block
- coil
- 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.)
- Expired
Links
- 238000003780 insertion Methods 0.000 claims description 12
- 230000037431 insertion Effects 0.000 claims description 12
- 230000005674 electromagnetic induction Effects 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000001746 injection moulding Methods 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 description 12
- 239000011347 resin Substances 0.000 description 10
- 229920005989 resin Polymers 0.000 description 10
- 238000001816 cooling Methods 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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)
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／固化させること
によつて、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/solidifying the resin by heating/cooling the tip of the nozzle. 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 fall of the resin flow path 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Ｗ、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
りの発熱量Q1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、熱伝達係数によつて決まる。金型と
ノズルの関係では、降温速度は金型との接触面
積、温度差で決まつてしまう。 In order to increase both the temperature increase rate and the temperature decrease rate, the heat capacity W, that is, the volume, of the heating element is made as small as possible. In order to increase only the heating rate, increase the calorific value Q 1 per unit time. With the electromagnetic induction heating method, the frequency, number of coil turns, and current can be increased. On the other hand, the rate of temperature decrease depends only on heat radiation unless a cooling medium is used to cool the heating element, in which case it is determined by the contact area with an object that is colder than the heating element, the temperature difference, and the 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、その外周にセラミツク
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）。 From the above point of view, the resin passage wall at the nozzle tip is formed of a 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 Patent Laid-Open No. 58-39428).
（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（１〜2.5ton／cm2）、ノズルタツチ力（２
〜3ton ｆ）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、セラミツク材料を使用したた
め、衝撃強度が不足する。また製作が困難である
と共に、発熱体の発熱時の膨張を抑えることがで
きず、セラミツ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
かり、冷却効率が低いという不都合があつた。(Problems to be Solved by the Invention) In general, the injection nozzle has a temperature (200 to 400°C), a resin pressure (1 to 2.5 ton/cm 2 ), a nozzle touch force (2
High reliability is required because the injection nozzle is used under extremely harsh environments such as 3 ton f), but because the conventional injection nozzle uses ceramic material, it lacks impact strength. In addition, it is difficult to manufacture, and it is impossible to suppress the expansion of the heating element when it generates heat, 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ツクを
装着し、該コイルブロツ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ツチ可能に
形成したことを特徴としており、かかる構成によ
つて、ノズル本体の放熱効果を向上させ、冷媒に
よる強制冷却をも可能にして、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 mold to allow the nozzle to touch the mold. In this way, the heat dissipation effect of the nozzle body is improved, and forced cooling by refrigerant is also made possible, 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。(Embodiment) An embodiment of the present invention will be described below with reference to FIG.
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。 In the figure, 1 is a fixed platen, and 2 is a mold attached to the platen 1.
３はコイルブロツクで、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に装着されたキヤツプ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、キヤツプ７には冷却水孔９
が穿設されている。そして、ボビン５及びキヤツ
プ７は非磁性材で製作されている。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
ラミツ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, the cap 7 has a cooling water hole 9.
is drilled. The bobbin 5 and cap 7 are made of 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.
このコイルブロツク３は、固定プラテン１を貫
通して金型２に取付ボルト１０により着脱可能に
装着されている。該ブロツ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にノズルタツ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 10. A nozzle insertion hole 8 in 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 attached to the mold 2.
１１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
対等の温度センサ１３が埋設されている。温度セ
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。 A nozzle body 11 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. 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、コイルブロツク３をボビン５とキヤツプ７
で構成した例につき説明したが、第２図に示す如
くコイルブロツク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。 In addition, coil block 3 is connected to bobbin 5 and cap 7.
As shown in FIG. 2, the coil block 3 is made of an integral piece made of aluminum or copper alloy by casting, and the electromagnetic induction coil 4 is embedded in a wound state around the nozzle insertion hole 8. At the same time, although not shown, cooling water holes 9 are provided around the coil 4.
It has the same effect even if .
また、コイルブロツク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
コイルブロツク３を固定プラテン１の金型側孔部
内に嵌合し、かつ、金型２で抜け止めして該プラ
テン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ツク３と冷却体（固定プ
ラテン１、金型２）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。 In addition, although an example has been described in which the coil block 3 is attached to the mold 1, as shown in FIGS. 2 and 3, the coil block 3 is fitted into the mold side hole of the fixed platen 1, and the mold The same effect can be obtained even if the platen 1 is attached to the platen 1 by being prevented from coming off with 2. In this case, the second
As shown in the figure, if the contact area between the coil block 3 and the cooling body (fixed platen 1, mold 2) is large,
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、コイルブロツ
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。この場
合、ノズル本体１１を金型２とのノズルタツチ位
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
とができる。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、樹脂の金型内射出が行なえる。(Function) When the electromagnetic induction coil 4 is energized, the nozzle body 11 inserted into the nozzle insertion hole 8 of the coil block 3 is rapidly heated by electromagnetic induction heating. In this case, if the nozzle body 11 is moved back from the nozzle touch position with the mold 2, the portion of the nozzle body 11 that is heated changes, and the temperature of the nozzle tip can be efficiently raised. Therefore, the solidified resin in the nozzle body 11 is reliably melted and the nozzle body 11 is opened, so that resin can be injected into the mold.
コイルブロツク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に設けること
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
ブロツク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。加えてコイルブロツク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１１を強
制的に冷却しうる。従つて、ノズル本体１１は速
かに降温されるため、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１１は閉
じる。 The coil block 3 is attached to the mold 2 (or fixed platen 1) and is made larger than the one attached to the nozzle body 11 so that it can be installed in the cooling water hole 9. Type 2
(or the mold 2 and fixed platen 1) over a wide area. Since the nozzle body 11 is surrounded by the coil block 3 and comes into contact with it over a wide area, and is 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 11 can be forcibly cooled. Therefore, since the temperature of the nozzle body 11 is quickly lowered, the resin within the nozzle body 11 is quickly and reliably solidified, and the nozzle body 11 is closed.
ノズル本体１１の昇温制御及び降温限温度維持
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 and temperature decrease limit temperature maintenance of the nozzle body 11 is 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ツクを
装着し、該ブロツクを、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
接触させると共に、前記コイルブロツクと広い面
積で接触するよう該ブロツ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
ロツクとの接触による高い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 that a forced cooling device can be incorporated therein. 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 with a high heat dissipation effect through 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、コイルブロツクの固定側配置により、ス
プルーレスの金型にも対応できると共に、固定プ
ラテン側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、金型側の
ブロツク取付け加工を不要にできる。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, by arranging the coil block on the fixed side, it can be used with sprue-less molds, and by arranging the coil block on the fixed platen side, the center hole of the fixed platen can be significantly reduced to improve rigidity, and the coil block on the mold side can be Installation processing can be eliminated. Furthermore, since the diameter of the nozzle tip can be made small, it is effective for a multi-nozzle injection device (see FIG. 3).
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
ルブロツク、４……電磁誘導コイル、５……ボビ
ン、６……コイル収納空間、７……キヤツプ、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)
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
ルブロツクを装着し、該コイルブロツクのノズル
挿入孔を、ノズル本体を嵌挿させて金型にノズル
タツ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。1. A coil block made of a non-magnetic material, which has 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 An injection nozzle for an injection molding machine, characterized in that a nozzle insertion hole is formed so that the nozzle body can be inserted into the mold and the nozzle can be touched.
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 JPS62124920A (en) | 1987-06-06 |
| JPH0156888B2 true 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) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH085098B2 (en) * | 1987-08-31 | 1996-01-24 | ファナック株式会社 | Nozzle device of injection molding machine |
| JPH0614996Y2 (en) * | 1990-03-31 | 1994-04-20 | 株式会社名機製作所 | Nozzle touch matching device |
| CN105946173B (en) * | 2016-05-27 | 2018-03-27 | 陈思 | Plastic cement projects equipment |
| CN106064442B (en) * | 2016-05-27 | 2018-09-04 | 陈思 | Plastic cement injection device |
-
1985
- 1985-11-27 JP JP26632385A patent/JPS62124920A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62124920A (en) | 1987-06-06 |
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