JPH0375015B2 - - Google Patents
Info
- Publication number
- JPH0375015B2 JPH0375015B2 JP23281186A JP23281186A JPH0375015B2 JP H0375015 B2 JPH0375015 B2 JP H0375015B2 JP 23281186 A JP23281186 A JP 23281186A JP 23281186 A JP23281186 A JP 23281186A JP H0375015 B2 JPH0375015 B2 JP H0375015B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- magnetic
- platen
- magnetic material
- path forming
- 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
- 230000005291 magnetic effect Effects 0.000 claims description 55
- 239000000696 magnetic material Substances 0.000 claims description 21
- 238000001746 injection moulding Methods 0.000 claims description 7
- 230000004907 flux Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004014 plasticizer Substances 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
- B29C45/0013—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fillers dispersed in the moulding material, e.g. metal particles
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- 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、プラスチツクマグネツト（異方性樹
脂磁石）を製造するための射出成形機に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an injection molding machine for manufacturing plastic magnets (anisotropic resin magnets).
（従来の技術とその問題点）
従来、タイバーを磁束のリターンヨークとする
プラスチツクマグネツト射出成形機では、磁場印
加用の電磁コイルをタイバー或はタイバーに取り
囲まれたヨークの外周に装着しており、この電磁
コイルにより、磁束が可動プラテン、ヨーク、金
型、固定プラテンと流れ、タイバーを経て可動プ
ラテンに戻る磁路を構成するが、この磁路を通過
する磁束の量は、どんなに大容量の電磁コイルを
使用しても、タイバーの断面積で決まつてしま
う。また、ラジアルヨークを前記タイバーに装着
すると、磁束は可動プラテンと固定プラテンから
夫々金型に到り、そこで90゜転向してタイバーに
流れ、再び分流して可動プラテンと固定プラテン
に戻る磁路を構成できるが、従来、第５図に示す
如く、ラジアルヨーク２４は金型の全周を取り囲
む形状となつており、大型かつ大重量なものであ
ると共に、取付具２５のボルト２６による止着で
タイバー２７に取り付けるため、取付と取外しが
容易にできないし、このラジアルヨーク２４によ
つて金型の温調配管等のスペースが大幅に制限さ
れるという欠点があつた。(Conventional technology and its problems) Conventionally, in plastic magnet injection molding machines that use tie bars as magnetic flux return yokes, an electromagnetic coil for applying a magnetic field is attached to the outer periphery of the tie bars or the yoke surrounded by the tie bars. With this electromagnetic coil, magnetic flux flows through the movable platen, yoke, mold, and fixed platen, forming a magnetic path that returns to the movable platen via the tie bar, but the amount of magnetic flux that passes through this magnetic path is Even if an electromagnetic coil is used, it is determined by the cross-sectional area of the tie bar. Furthermore, when the radial yoke is attached to the tie bar, the magnetic flux reaches the mold from the movable platen and the fixed platen, where it is turned by 90 degrees, flows to the tie bar, and is split again to form a magnetic path returning to the movable platen and the fixed platen. However, conventionally, as shown in FIG. 5, the radial yoke 24 has a shape that surrounds the entire circumference of the mold, is large and heavy, and cannot be fastened with the bolts 26 of the fixture 25. Since it is attached to the tie bar 27, it cannot be easily attached and removed, and the radial yoke 24 has the disadvantage that the space for temperature control piping of the mold, etc. is greatly restricted.
（発明の目的）
本発明は、前記従来の問題点を解決するために
なしたもので、磁気効率を向上させると共に、ラ
ジアルヨークを設置し易くし、かつ、その設置ス
ペースを小さくして金型等の温調配管をし易くす
ることを目的とする。(Object of the Invention) The present invention was made to solve the above-mentioned conventional problems, and it improves magnetic efficiency, makes it easier to install a radial yoke, reduces the installation space, and molds the mold. The purpose is to make temperature control piping easier to install.
（問題点を解決するための手段）
本発明のプラスチツクマグネツト射出成形機
は、タイバーを非磁性材で構成し、かつ、可動プ
ラテン、固定プラテン及び金型を磁性材で構成す
ると共に、磁場印加用の電磁コイルを設けたプラ
スチツクマグネツト射出成形機において、可動プ
ラテン及び／又は固定プラテンの電磁コイルを取
り囲む位置に、型開閉方向に延在する磁性材で構
成した磁路形成突起を設け、両プラテンに設けた
該突起間又は一方のプラテンと突起との間に型締
時微小間隙ができるようにしたことを特徴とする
ものである。(Means for Solving the Problems) The plastic magnet injection molding machine of the present invention has a tie bar made of a non-magnetic material, a movable platen, a fixed platen, and a mold made of a magnetic material, and a magnetic field applied thereto. In a plastic magnet injection molding machine equipped with an electromagnetic coil for molding, a magnetic path forming protrusion made of a magnetic material extending in the mold opening/closing direction is provided at a position surrounding the electromagnetic coil of the movable platen and/or the fixed platen. It is characterized in that a minute gap is created between the protrusions provided on the platen or between one platen and the protrusions during mold clamping.
（実施例）
以下、本発明を、型開閉方向の磁場をキヤビテ
イに発生させる実施例につき第１図及び第２図に
沿い説明する。(Example) The present invention will be described below with reference to FIGS. 1 and 2 with respect to an example in which a magnetic field in the mold opening/closing direction is generated in a cavity.
図中１は非磁性材で構成したタイバーである。 In the figure, 1 is a tie bar made of a non-magnetic material.
２は磁性材で構成した固定プラテンで、該プラ
テン表面のタイバー１に取り囲まれた位置には、
磁性材で構成した金型３が装着され、かつ、タイ
バー１を取り囲む位置には電磁コイル４が磁性材
で構成したコイルケーシング５を介して装着、固
定されている。そして金型３のまわりには、非磁
性材で構成した金型６が取り付けられている。 2 is a fixed platen made of magnetic material, and at a position surrounded by tie bars 1 on the surface of the platen,
A mold 3 made of a magnetic material is mounted, and an electromagnetic coil 4 is mounted and fixed at a position surrounding the tie bar 1 via a coil casing 5 made of a magnetic material. A mold 6 made of a non-magnetic material is attached around the mold 3.
７は磁性材で構成した可動プラテンで、図示し
ない型締装置によりタイバー１に沿い固定プラテ
ン２に対して前後進可能となつており、該プラテ
ン表面のタイバーに取り囲まれた位置には、磁性
材で構成した金型８が装着され、かつ、タイバー
１を取り囲む位置には電磁コイル９が磁性材で構
成したコイルケーシング１０を介して装着、固定
されている。そして金型８のまわりには、非磁性
材で構成した金型１１が取り付けられると共に、
該金型８には、一端をキヤビテイ１２に臨ませ、
かつ、他端をエジエクタプレート１３で連結した
エジエクタピン１４がエジエクタシリンダ１５に
より突出動作可能に挿設されている。 Reference numeral 7 denotes a movable platen made of a magnetic material, which is movable back and forth along the tie bars 1 with respect to the fixed platen 2 by a mold clamping device (not shown). A mold 8 constructed of the above is mounted, and an electromagnetic coil 9 is mounted and fixed at a position surrounding the tie bar 1 via a coil casing 10 constructed of a magnetic material. A mold 11 made of a non-magnetic material is attached around the mold 8, and
The mold 8 has one end facing the cavity 12,
Further, an ejector pin 14 whose other end is connected by an ejector plate 13 is inserted into an ejector cylinder 15 so as to be able to project.
１６は磁性材で構成した磁路形成突起で、各タ
イバー１の付近のコイルケーシング５に一体に連
設されて型開閉方向に沿い可動プラテン７側に延
在している。 Reference numeral 16 denotes a magnetic path forming projection made of a magnetic material, which is integrally connected to the coil casing 5 near each tie bar 1 and extends toward the movable platen 7 along the mold opening/closing direction.
１７は磁性材で構成した磁路形成突起で、各タ
イバー１の付近のコイルケーシング１０に一体に
連設されて型開閉方向に沿い固定プラテン２側に
延在している。 Reference numeral 17 denotes a magnetic path forming projection made of a magnetic material, which is integrally connected to the coil casing 10 near each tie bar 1 and extends toward the fixed platen 2 along the mold opening/closing direction.
この磁路形成突起１７と前記磁路形成突起１６
は、第１図に示す如く型締時型開閉方向と直角方
向で微小間隙g1をおいて重なり合い、かつ、型開
閉方向で、金型３，８の全厚Ｈの増減に対応でき
る間隙g2をおいて対向している。 This magnetic path forming projection 17 and the magnetic path forming projection 16
As shown in Fig. 1, these overlap with each other with a minute gap g1 in the direction perpendicular to the mold opening/closing direction during mold clamping, and have a gap g that can accommodate the increase/decrease in the total thickness H of the molds 3 and 8 in the mold opening/closing direction. 2 and facing each other.
（作用）
同一方向の磁場が発生するよう電磁コイル４，
９に通電すると、第１図に矢印で示すように磁束
は可動プラテン７、金型８，３から固定プラテン
２へと流れ、電磁コイル４，９の４隅の外側をコ
イルケーシング５，１０及び磁路形成突起１６，
１７を経て可動プラテン７に戻る閉磁路を形成す
る。このため、キヤビテイ１２に型開閉方向に沿
う磁束φの磁場が印加される。(Function) The electromagnetic coil 4,
9, magnetic flux flows from the movable platen 7 and molds 8, 3 to the fixed platen 2, as shown by the arrows in FIG. magnetic path forming protrusion 16,
17 to form a closed magnetic path returning to the movable platen 7. Therefore, a magnetic field of magnetic flux φ along the mold opening/closing direction is applied to the cavity 12.
ところで、磁路形成突起１６，１７は、型開閉
方向と直角方向に微小間隙g1をおいて互に重なり
合つており、固定プラテン２から可動プラテン７
へ戻る際の磁束のリークは極めて小さいと共に、
磁路形成突起１６，１７の断面積（＝厚さ×彎曲
長さ）をタイバー１と無関係により大きくして通
過磁束量を大きくできるから、キヤビテイ１２に
印加される磁場を強力なものとすることが可能で
ある。このことは、金型３，８の厚みＨが変化し
ても、微小間隙g1が変化しないから同様である。 Incidentally, the magnetic path forming protrusions 16 and 17 overlap each other with a minute gap g 1 in the direction perpendicular to the mold opening/closing direction, and extend from the fixed platen 2 to the movable platen 7.
The leakage of magnetic flux when returning to is extremely small, and
Since the cross-sectional area (=thickness x curved length) of the magnetic path forming protrusions 16 and 17 can be made larger regardless of the tie bar 1, the amount of passing magnetic flux can be increased, so that the magnetic field applied to the cavity 12 can be made strong. is possible. This is true because even if the thickness H of the molds 3 and 8 changes, the minute gap g1 does not change.
一方、キヤビテイ１２に、可塑化装置１８によ
り樹脂通路１９を経て強磁性粉体と溶融樹脂の混
練物が射出充填されていると、印加した磁場によ
つて、強磁性粉子の各粒子は、磁化容易化軸が磁
束に沿つて略平行に揃うよう配向され、その位置
を保持したまま成形品は冷却固化される。次い
で、型開き及びエジエクタ動作が順次行なわれ、
成形品は金型３，６，８，１１内から排出され
る。 On the other hand, when the cavity 12 is injected and filled with a mixture of ferromagnetic powder and molten resin through the resin passage 19 by the plasticizer 18, each particle of the ferromagnetic powder is The magnetization axes are oriented so as to be aligned substantially parallel to the magnetic flux, and the molded product is cooled and solidified while maintaining this position. Next, mold opening and ejector operations are performed sequentially,
The molded product is discharged from the molds 3, 6, 8, and 11.
次に本発明を、型開閉方向と直角方向の磁場を
キヤビテイに発生させる実施例につき第３図及び
第４図に沿い説明する。尚、図中前記実施例と作
用効果を同一にする部分には同一の符号を付して
説明を省略する。 Next, the present invention will be explained with reference to FIGS. 3 and 4 regarding an embodiment in which a magnetic field is generated in a cavity in a direction perpendicular to the mold opening/closing direction. Incidentally, in the drawings, parts having the same functions and effects as those of the previous embodiment are given the same reference numerals, and explanations thereof will be omitted.
図中２０は磁性材で構成した金型で、金型６上
に装着されており、金型６，１１間に挾まれた形
で金型８の周りに配置されてリング状のキヤビテ
イ２１を形成する。 In the figure, reference numeral 20 denotes a mold made of magnetic material, which is mounted on the mold 6, and is arranged around the mold 8 between the molds 6 and 11 to form a ring-shaped cavity 21. Form.
２２は磁性材で構成した２分割構造の矩形板状
ラジアルヨークで、各タイバー１に回転可能に装
着、嵌合され、かつ、該ヨーク２２の一端部にて
ボルト２３により金型６に固定されており（固定
せず、近接配置でもよい。）、該ヨーク２２の他端
に形成した円弧状端面２４は固定側の磁路形成突
起１６の内周面に微小間隙g3をおいて対向配置さ
れている。 Reference numeral 22 denotes a rectangular plate-shaped radial yoke with a two-part structure made of magnetic material, which is rotatably attached and fitted to each tie bar 1, and is fixed to the mold 6 with a bolt 23 at one end of the yoke 22. The arc-shaped end surface 24 formed at the other end of the yoke 22 is arranged opposite to the inner circumferential surface of the magnetic path forming projection 16 on the fixed side with a small gap g 3 therebetween. has been done.
（作用）
反対方向の磁場が発生するよう電磁コイル４，
９に通電すると、第３図に矢印で示す如く、磁束
は固定プラテン２、金型３と可動プラテン７、金
型８を逆方向に流れた後、可動側金型８の先端部
分で90゜向きを変えて固定側金型２０、ラジアル
ヨーク２２と同一方向に流れ、ラジアルヨーク２
２の外周で分流して夫々電磁コイル４，９の４隅
の外側を磁路形成突起１６，１７，コイルケーシ
ング５，１０を経て固定プラテン２と可動プラテ
ン７に戻る閉磁路を形成する。このため、キヤビ
テイ２１に型開閉方向と直角方向に沿う磁束φの
磁場が印加されるから、この磁場によつて、キヤ
ビテイ２１内充填物中の強磁性体の各粒子は、磁
化容易化軸が磁束に沿つて放射状に沿うよう配向
され、軸方向ラジアルに比較して高レベルの磁束
密度でその位置を保持したまま成形品は冷却固化
される。この成形品は、金型３，６，８，１１，
２０内から排出された後例えば着磁器で多極に着
磁される。(Function) The electromagnetic coil 4,
9, the magnetic flux flows in the opposite direction through the fixed platen 2, mold 3, movable platen 7, and mold 8, as shown by the arrow in FIG. The direction is changed and the flow flows in the same direction as the fixed side mold 20 and the radial yoke 22, and the radial yoke 2
The current is divided at the outer periphery of the electromagnetic coils 4 and 9 to form a closed magnetic path that returns to the fixed platen 2 and the movable platen 7 via the magnetic path forming projections 16 and 17 and the coil casings 5 and 10, respectively. For this reason, a magnetic field of magnetic flux φ along the direction perpendicular to the mold opening/closing direction is applied to the cavity 21, so that each particle of the ferromagnetic material in the filling inside the cavity 21 has an axis of easy magnetization. The molded product is oriented radially along the magnetic flux, and the molded product is cooled and solidified while maintaining its position at a higher level of magnetic flux density than in the axial radial direction. This molded product consists of molds 3, 6, 8, 11,
After being ejected from the inside of 20, it is magnetized into multiple poles using a magnetizer, for example.
前記実施例の如く成形機を使用する場合には、
ボルト２３を外してラジアルヨーク２２をタイバ
ー１を中心として例えば第４図に示す矢印方向に
90゜回転させ、ラジアルヨーク２２と磁路形成突
起１６，１７、金型３，８との間を大きく開くこ
とができるから、金型脱着時ラジアルヨーク２２
をタイバー１から脱着させる必要はないし、ラジ
アルヨーク２２はコンパクトであるから、クレー
ンを使用しなくても容易に脱着できると共に、隣
合うラジアルヨーク２２間の型板に金型温調用の
配管又はカートリツジヒータを取り付けることが
できる。 When using a molding machine as in the above embodiment,
Remove the bolts 23 and move the radial yoke 22 around the tie bar 1 in the direction of the arrow shown in FIG. 4, for example.
The radial yoke 22 can be rotated 90 degrees to widen the gap between the radial yoke 22, the magnetic path forming protrusions 16 and 17, and the molds 3 and 8.
There is no need to attach or detach the radial yokes 22 from the tie bar 1, and since the radial yokes 22 are compact, they can be easily attached or detached without using a crane. A tri-heater can be attached.
尚、前２実施例では、固定プラテン２と可動プ
ラテン７に、型開閉方向と直角方向に微小間隙g1
を有する磁路形成突起１６，１７を設けたが、金
型３，８の厚みＨが一定であるときは、該突起間
の型開閉方向に微小間隙g1を設けても同効である
と共に、固定プラテン２と可動プラテン７の双方
ではなく一方にだけ磁路形成突起１６，１７を設
け、該一方のプラテンと磁路形成突起１６，１７
との間の型開閉方向或はその直角方向に微小間隙
g1を設けても同効である。磁路形成突起１６，１
７を、ボルトと長孔によるスライド機構等で延出
長を調整できるようにすれば、金型厚Ｈが変化し
ても、該突起と一方のプラテンとの間の型開閉方
向に微小間隙g1を設けることができるから、金型
厚Ｈの変化に充分対応できる。 In the previous two embodiments, there is a small gap g 1 between the fixed platen 2 and the movable platen 7 in the direction perpendicular to the mold opening/closing direction.
However, when the thickness H of the molds 3 and 8 is constant, it is equally effective to provide a minute gap g1 in the mold opening/closing direction between the projections. , the magnetic path forming protrusions 16, 17 are provided on only one of the fixed platen 2 and the movable platen 7 rather than on both, and the magnetic path forming protrusions 16, 17 are provided on the one platen and the magnetic path forming protrusions 16, 17.
A small gap in the mold opening/closing direction or perpendicular direction between
The same effect can be achieved even if g 1 is provided. Magnetic path forming protrusion 16,1
If the extension length of 7 can be adjusted using a slide mechanism using bolts and elongated holes, even if the mold thickness H changes, there will be a small gap g in the mold opening/closing direction between the protrusion and one platen. 1 , it is possible to sufficiently cope with changes in the mold thickness H.
（発明の効果）
以上の通り本発明は、タイバーを非磁性材で構
成し、該タイバーとは別に型開閉方向に延在する
磁性材で構成した磁路形成突起を固定プラテン及
び／又は可動プラテンに設け、両プラテンに設け
た該突起間又は一方のプラテンと該突起との間に
型締時微小間隙ができるようにしたため、磁路形
成突起の断面積をタイバーと無関係に大きくして
該突起を通過する磁束量を大きくでき、かつ、微
小間隙で磁束のリークを極小に抑えて磁気効率を
向上させうるから、電力効率良くキヤビテイに強
力な磁場を印加することが可能になると共に、磁
路形成突起を電磁コイルの４隅等に限定して設け
て該突起間を大きく開口させることができるか
ら、金型の脱着、金型温調配管等を支障なく行な
うことが可能になる。また、実施例の如くラジア
ルヨークを設置し易くし、かつ、その設置スペー
スを小さくできる。(Effects of the Invention) As described above, the present invention includes a tie bar made of a non-magnetic material, and a magnetic path forming protrusion made of a magnetic material that extends in the mold opening/closing direction separately from the tie bar. The cross-sectional area of the magnetic path forming projections is increased regardless of the tie bar, so that a minute gap is created between the projections provided on both platens or between one platen and the projections during mold clamping. It is possible to increase the amount of magnetic flux that passes through the cavity, and to improve magnetic efficiency by minimizing leakage of magnetic flux in minute gaps, which makes it possible to apply a strong magnetic field to the cavity with high power efficiency, and to improve the magnetic field. Since the forming protrusions can be provided only at the four corners of the electromagnetic coil and the space between the protrusions can be widened, it is possible to attach and detach the mold, mold temperature control piping, etc. without any trouble. Further, as in the embodiment, the radial yoke can be easily installed and the installation space can be reduced.
第１図は本発明の第１実施例を示す平断面図、
第２図は部分的に示す第１図のＡ〜線に沿う断面
図、第３図は本発明の第２実施例を示す平断面
図、第４図は部分的に示す第３図のＢ〜線に沿う
断面図、第５図は従来例を示す第４図に対応した
断面図である。
１……タイバー、２……固定プラテン、３，
６，２０……固定側金型、４，９……電磁コイ
ル、５，１０……コイルケーシング、７……可動
プラテン、８，１１……可動側金型、１２，２１
……キヤビテイ、１６，１７……磁路形成突起、
２２……ラジアルヨーク、２３……ボルト。
FIG. 1 is a plan sectional view showing a first embodiment of the present invention;
2 is a partially shown cross-sectional view taken along line A-- in FIG. 1, FIG. 3 is a plan cross-sectional view showing a second embodiment of the present invention, and FIG. 4 is a partially shown cross-sectional view taken along line B in FIG. 3. 5 is a sectional view corresponding to FIG. 4 showing a conventional example. 1...Tie bar, 2...Fixed platen, 3,
6, 20... Fixed side mold, 4, 9... Electromagnetic coil, 5, 10... Coil casing, 7... Movable platen, 8, 11... Movable side mold, 12, 21
...Cavity, 16,17...Magnetic path forming projection,
22...Radial yoke, 23...Bolt.
Claims (1)
ラテン、固定プラテン及び金型を磁性材で構成す
ると共に、磁場印加用の電磁コイルを設けたプラ
スチツクマグネツト射出成形機において、可動プ
ラテン及び／又は固定プラテンの電磁コイルを取
り囲む位置に、型開閉方向に延在する磁性材で構
成した磁路形成突起を設け、両プラテンに設けた
該突起間又は一方のプラテンと突起との間に型締
時微小間隙ができるようにしたことを特徴とする
プラスチツクマグネツト射出成形機。 ２ 反発磁場を形成するに際し、型開閉方向に延
在する磁路形成突起と金型の間に磁路を構成する
磁性材のラジアルヨークを複数配したことを特徴
とする特許請求の範囲第１項記載のプラスチツク
マグネツト射出成形機。[Scope of Claims] 1. In a plastic magnet injection molding machine in which the tie bar is made of a non-magnetic material, the movable platen, the fixed platen and the mold are made of magnetic material, and an electromagnetic coil for applying a magnetic field is provided. , a magnetic path forming protrusion made of a magnetic material extending in the mold opening/closing direction is provided at a position surrounding the electromagnetic coil of the movable platen and/or the fixed platen, and between the protrusions provided on both platens or between one platen and the protrusion. A plastic magnet injection molding machine characterized in that a minute gap is created between the molds when the mold is clamped. 2. When forming a repulsive magnetic field, a plurality of radial yokes made of magnetic material are arranged to form a magnetic path between the magnetic path forming protrusion extending in the mold opening/closing direction and the mold. The plastic magnetic injection molding machine described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23281186A JPS6387217A (en) | 1986-09-30 | 1986-09-30 | Magnet injection molding machine for plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23281186A JPS6387217A (en) | 1986-09-30 | 1986-09-30 | Magnet injection molding machine for plastic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6387217A JPS6387217A (en) | 1988-04-18 |
| JPH0375015B2 true JPH0375015B2 (en) | 1991-11-28 |
Family
ID=16945138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23281186A Granted JPS6387217A (en) | 1986-09-30 | 1986-09-30 | Magnet injection molding machine for plastic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6387217A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4761913B2 (en) * | 2005-10-06 | 2011-08-31 | 株式会社東芝 | Electromagnetic actuator |
-
1986
- 1986-09-30 JP JP23281186A patent/JPS6387217A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6387217A (en) | 1988-04-18 |
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