JP2000205173A - Method for coating rotator by molding - Google Patents
Method for coating rotator by moldingInfo
- Publication number
- JP2000205173A JP2000205173A JP891999A JP891999A JP2000205173A JP 2000205173 A JP2000205173 A JP 2000205173A JP 891999 A JP891999 A JP 891999A JP 891999 A JP891999 A JP 891999A JP 2000205173 A JP2000205173 A JP 2000205173A
- Authority
- JP
- Japan
- Prior art keywords
- resin material
- molding space
- molding
- support member
- rotating 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.)
- Pending
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、マグネットポンプ
のインナーマグネット等、全外面が樹脂被覆される回転
体の成形被覆方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming and coating a rotating body such as an inner magnet of a magnet pump whose entire outer surface is coated with a resin.
【０００２】[0002]
【従来の技術】マグネットポンプは、ポンプ室内で羽根
車と共に回転するインナーマグネット（従動マグネッ
ト）が、ポンプ室外で回転するアウターマグネット（駆
動マグネット）により磁気的に駆動される構成となって
おり、ポンプ室の後壁を貫通する回転軸封部が存在しな
い。そのためマグネットポンプは、ポンプ室からの液漏
れがなく、腐食性の強い薬液の移送に適している。2. Description of the Related Art A magnet pump has a structure in which an inner magnet (driven magnet) that rotates together with an impeller in a pump chamber is magnetically driven by an outer magnet (drive magnet) that rotates outside the pump chamber. There is no rotary shaft seal through the rear wall of the chamber. Therefore, the magnet pump does not leak from the pump chamber and is suitable for transferring highly corrosive chemicals.
【０００３】図４に示すマグネットポンプ１００では、
吸込口１０１と吐出口１０２を有するフロントケーシン
グ１０３と、フロントケーシング１０３とモーター１０
４側ケーシング１０５との間に挟まれたリアケーシング
１０６とによりポンプ室１０７を形成している。In the magnet pump 100 shown in FIG.
A front casing 103 having a suction port 101 and a discharge port 102;
A pump chamber 107 is formed by the rear casing 106 sandwiched between the fourth casing 105 and the fourth casing 105.
【０００４】フロントケーシング１０３の内面は合成樹
脂で被覆され、リアケーシング１０６は、炭素繊維、ガ
ラス繊維などを含む繊維強化合成樹脂で形成されてい
る。ポンプ室１０７内のフロントケーシング１０３とリ
アケーシング１０６の間にセラミック製の中心軸１０８
が支持され、中心軸１０８に外嵌された合成樹脂製ベア
リング１０９上で、合成樹脂被覆されたインナーマグネ
ット１１０と合成樹脂製の羽根車１１１とがセラミック
製スラスト材１１２に挟まれて一体的回転が可能となっ
ており、リアケーシング１０６の外部を回転するアウタ
ーマグネット１１３によりインナーマグネット１１０と
共に羽根車１１１が回転駆動されて液の移送が行われ
る。[0004] The inner surface of the front casing 103 is coated with a synthetic resin, and the rear casing 106 is formed of a fiber-reinforced synthetic resin containing carbon fiber, glass fiber, or the like. A center shaft 108 made of ceramic is provided between a front casing 103 and a rear casing 106 in a pump chamber 107.
Are supported, and a synthetic resin-coated inner magnet 110 and a synthetic resin impeller 111 are sandwiched between ceramic thrust members 112 and integrally rotated on a synthetic resin bearing 109 externally fitted to the central shaft 108. The impeller 111 is driven to rotate together with the inner magnet 110 by the outer magnet 113 rotating outside the rear casing 106 to transfer the liquid.
【０００５】上記のようにマグネットポンプ１００の接
液部分は、セラミック材料、合成樹脂材料などで構成さ
れ、特に耐食性が要求される場合は、合成樹脂材料とし
て、PTFE（ポリ４フッ化エチレン）、PFA（４フッ化エ
チレンとパーフロロアルキルビニルエーテルとの共重合
体）、FEP（４フッ化エチレンと６フッ化プロピレンの
共重合体）、PVdF（ポリフッ化ビニリデン：２フッ化樹
脂）、ETFE（テトラフルオロエチレン−エチレン共重合
体）等のフッ素樹脂が使用される。これらのフッ素樹脂
は、他の合成樹脂に比べて高度な耐食性を備えている
が、溶融温度が高く溶融時に高い粘度を有し、ある程度
以上の高粘度になると互いに融着しない性質をもつた
め、フッ素樹脂の種類によっては、一旦固化した樹脂に
新たな樹脂を融着させることが困難である。耐食性・耐
熱性の高いものほどこの傾向が強い。[0005] As described above, the liquid contact portion of the magnet pump 100 is made of a ceramic material, a synthetic resin material, or the like. When corrosion resistance is particularly required, PTFE (polytetrafluoroethylene), PFA (copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether), FEP (copolymer of tetrafluoroethylene and propylene hexafluoride), PVdF (polyvinylidene fluoride: difluororesin), ETFE (tetrafluoroethylene) A fluororesin such as fluoroethylene-ethylene copolymer) is used. Although these fluororesins have higher corrosion resistance than other synthetic resins, they have a high melting temperature and a high viscosity at the time of melting, and have a property that they do not fuse with each other when the viscosity reaches a certain level or more, Depending on the type of fluororesin, it is difficult to fuse a new resin to the once solidified resin. The higher the corrosion resistance and heat resistance, the stronger this tendency.
【０００６】インナーマグネット１１０は、図５に示す
ように、段付き中心孔１１５を有する円筒状の鉄心１１
６の外周に希土類元素系などの永久磁石１１７を固定し
たもので、ポンプ室１０７（図４）の薬液から鉄心１１
６を保護するため、外面全体がフッ素樹脂等の被覆層１
１８で覆われている。被覆層１１８は、インナーマグネ
ット１１０を成形金型の成形空間内で支持部材で支持
後、射出成形、トランスファー成形などの成形被覆によ
って形成される。図６に示すように、被覆層１１８の成
形被覆と同時に羽根車１１１を一体に成形することもで
きる。この成形被覆方法では、成形空間内でインナーマ
グネット１１０の支持された部分にフッ素樹脂が被覆さ
れないため、成形被覆の完了後、支持部材を除去した非
被覆部分に合成樹脂を充填してインナーマグネット１１
０の全外面の被覆層１１８を形成する。As shown in FIG. 5, the inner magnet 110 has a cylindrical core 11 having a stepped central hole 115.
6, a permanent magnet 117 made of a rare earth element or the like is fixed to the outer periphery of the pump chamber 107 (FIG. 4).
6, the entire outer surface is covered with a coating layer 1 of fluororesin or the like.
18 covered. The coating layer 118 is formed by molding and coating such as injection molding and transfer molding after the inner magnet 110 is supported by the support member in the molding space of the molding die. As shown in FIG. 6, the impeller 111 can be integrally formed at the same time as the forming and coating of the coating layer 118. In this molding and coating method, since the fluororesin is not coated on the portion where the inner magnet 110 is supported in the molding space, after completion of the molding and coating, the uncoated portion from which the support member is removed is filled with a synthetic resin to form the inner magnet 11.
0 is formed on the entire outer surface.
【０００７】インナーマグネットの全体をフッ素樹脂で
覆う別の成形被覆方法として、特許第２７９５６９５号
に、冷却水移送用マグネットポンプのマグネットモール
ド品の製造方法が開示されている。この方法によると、
ステンレス鋼製の軸受けホルダーの周りにフッ素樹脂に
よる第１マグネットモールド品を成形し、成形された第
１マグネットモールド品の外周を円形に仕上げ加工して
円筒形の従動マグネットを圧入した後、その外周に第２
マグネットモールド品を成形被覆して、従動マグネット
の全面をフッ素樹脂で被覆するようにしている。この２
段階成形被覆方法では、一旦固化した第１マグネットモ
ールド品のフッ素樹脂と第２マグネットモールド品のフ
ッ素樹脂との間に非融着の境界部ができるため、その対
策として第１マグネットモールド品と第２マグネットモ
ールド品の間にできる２つの境界部のうち、一方の境界
部を軸受けホルダー側に位置させ、他方の境界部を凹凸
形状として境界部からの水の侵入を防止している。As another forming and covering method for covering the entire inner magnet with a fluororesin, Japanese Patent No. 2795695 discloses a method for manufacturing a magnet molded product of a magnet pump for transferring cooling water. According to this method,
A first magnet molded product made of a fluororesin is formed around a stainless steel bearing holder, the outer periphery of the formed first magnet molded product is finished in a circular shape, and a cylindrical driven magnet is pressed into the outer periphery. Second
A magnet mold product is formed and coated, and the entire surface of the driven magnet is coated with a fluororesin. This 2
In the step forming and coating method, a non-fused boundary is formed between the fluororesin of the first magnet molded product and the fluororesin of the second magnet molded product which have been solidified. Of the two boundary portions formed between the two magnet molded products, one of the boundary portions is located on the bearing holder side, and the other boundary portion has an uneven shape to prevent water from entering from the boundary portion.
【０００８】[0008]
【発明が解決しようとする課題】インナーマグネットは
全面が被覆層で覆われていても、上記の非融着の境界部
等を通じて被覆層内部に僅かな薬液が浸透すると鉄心が
腐食するため、特に腐食性の強い薬液を移送するマグネ
ットポンプのインナーマグネットは、被覆層に完全な封
止機能が要求される。Even if the inner magnet is entirely covered with the coating layer, the core is corroded if a small amount of chemical solution penetrates into the coating layer through the above-mentioned non-fused boundary or the like. The inner magnet of a magnet pump for transferring a highly corrosive chemical solution requires a complete sealing function in the coating layer.
【０００９】成形金型の成形空間内でインナーマグネッ
トを支持部材で支持して被覆層を成形被覆した後、支持
部材を除去してできる非被覆部分に合成樹脂を充填する
前記成形被覆方法では、合成樹脂の充填が余分の工程と
なり、被覆層が高融点、高溶融粘度のフッ素樹脂ある場
合は、融着による封止が困難である。In the molding and coating method, the inner magnet is supported by a support member in the molding space of the molding die to form and coat the coating layer, and then the uncoated portion formed by removing the support member is filled with a synthetic resin. Filling with a synthetic resin is an extra step, and when the coating layer is a fluororesin having a high melting point and a high melt viscosity, sealing by fusion is difficult.
【００１０】前記特許第２７９５６９５号に記載の方法
は、途中に機械加工を含む２段階成形被覆であるため工
程が複雑であるだけでなく、第１マグネットモールド品
と第２マグネットモールド品の間に非融着の長い境界部
ができ、それだけ完全な封止が難しくなるため、腐食性
の強い薬液を移送するマグネットポンプには適用できな
い。[0010] The method described in the aforementioned Japanese Patent No. 2795695 is not only complicated in the process because it is a two-stage molding coating including machining in the middle, but also between the first magnet molded product and the second magnet molded product. Since a long non-fused boundary portion is formed, it is difficult to completely seal the boundary portion. Therefore, it cannot be applied to a magnet pump for transferring a highly corrosive chemical solution.
【００１１】本発明の課題は、１回の成形被覆によっ
て、マグネットポンプのインナーマグネット等の全外面
に完全に融着一体化した被覆層を形成できる回転体の成
形被覆方法を提供することである。An object of the present invention is to provide a forming and coating method for a rotating body capable of forming a coating layer completely fused and integrated on the entire outer surface of an inner magnet or the like of a magnet pump by one forming and coating. .
【００１２】[0012]
【課題を解決するための手段】前記の課題は、本発明の
成形被覆方法によって解決される。即ち、本発明の成形
被覆方法は、請求項１に記載のとおり、成形金型の成形
空間内に出し入れ可能な支持部材で回転体を成形空間内
で支持し、成形空間内に溶融樹脂材料を注入して成形空
間内の樹脂材料を加圧した状態で、樹脂材料が完全に固
化する前に支持部材を成形空間から引き出すことを特徴
としている。この方法によると、支持部材を除去した空
間に加圧された樹脂材料を充填されるため、１回の成形
被覆によって、回転体の外面全体に完全に融着一体化し
た樹脂被覆層を形成することができる。The above-mentioned object is achieved by the method of molding and covering according to the present invention. That is, as described in claim 1, the molding and coating method of the present invention supports the rotating body in the molding space with a support member that can be inserted into and removed from the molding space of the molding die, and the molten resin material is filled in the molding space. It is characterized in that the supporting member is drawn out of the molding space before the resin material is completely solidified in a state where the resin material is injected and pressurized in the molding space. According to this method, the space from which the support member has been removed is filled with the pressurized resin material, so that the resin coating layer that is completely fused and integrated over the entire outer surface of the rotating body is formed by one molding coating. be able to.
【００１３】この成形被覆方法は、請求項２に記載のと
おり、回転体がマグネットポンプのインナーマグネット
である場合に適している。インナーマグネット等の回転
体では、支持を外された後の回転体の位置ずれ、特に中
心軸からの偏心量を小さく抑える必要があるが、成形空
間内の樹脂材料が完全に固化する前の適切な時期に支持
部材の引き出しを行うことにより、回転体の偏心量を問
題のない範囲に抑えることができる。This forming and coating method is suitable when the rotating body is an inner magnet of a magnet pump, as described in claim 2. In the case of a rotating body such as an inner magnet, it is necessary to reduce the displacement of the rotating body after removal of support, especially the amount of eccentricity from the center axis, but it is necessary to reduce the amount of eccentricity before the resin material in the molding space is completely solidified. By pulling out the support member at an appropriate time, the amount of eccentricity of the rotating body can be suppressed to a range where there is no problem.
【００１４】成形空間内の樹脂材料が完全に固化する前
の適切な時期とは、支持部材を外された回転体が自重で
沈下したり、支持部材に追従して動かない程度に、回転
体の周囲で樹脂材料の粘度が充分に高まっており、且つ
支持部材の周りでは樹脂材料が、加圧によって支持部材
を除去した空間に充填できる粘度を有している時期であ
る。The appropriate time before the resin material in the molding space is completely solidified means that the rotating body from which the support member has been removed is settled by its own weight or does not move following the support member. This is a time when the viscosity of the resin material around the support member is sufficiently high, and the resin material around the support member has a viscosity enough to fill the space from which the support member has been removed by pressurization.
【００１５】なお、請求項３に記載のとおり、支持部材
を引き出した後、樹脂材料が完全に固化するまで樹脂材
料の加圧を続けて、支持部材を除去した空間に充填され
た樹脂材料に歪みが残らないようにすることが望まし
い。As described in claim 3, after the support member is drawn out, the resin material is continuously pressed until the resin material is completely solidified, and the resin material filled in the space from which the support member has been removed is removed. It is desirable that no distortion remains.
【００１６】上記の成形被覆方法は、請求項４に記載の
とおり、フッ素樹脂の成形被覆に適している。一旦固化
した樹脂への融着が難しいフッ素樹脂であっても、１回
の成形被覆によって、回転体の外面全体に完全に融着一
体化した被覆層を形成することができる。The above-mentioned molding and coating method is suitable for the molding and coating of a fluororesin as described in claim 4. Even if it is a fluororesin that is difficult to be fused to the resin once solidified, a coating layer that is completely fused and integrated over the entire outer surface of the rotating body can be formed by one molding coating.
【００１７】支持部材が外された後の回転体の位置ずれ
を防止する方法として、請求項５に記載のとおり、回転
体を成形空間内の一方の側で支持し、回転体の支持側か
ら成形空間内の樹脂材料を加圧することが有効である。
これにより、支持部材の引き出し及び引き出し空間への
樹脂材料の充填に伴って樹脂材料が流動する領域が回転
体の一方の側に限定されるため、回転体の位置ずれを最
小限度にとどめることができる。As a method for preventing the rotational body from being displaced after the support member is detached, as described in claim 5, the rotational body is supported on one side in the molding space, and from the support side of the rotational body. It is effective to pressurize the resin material in the molding space.
Thereby, the region where the resin material flows with the drawing of the support member and the filling of the drawing material with the resin material is limited to one side of the rotating body, so that the displacement of the rotating body can be minimized. it can.
【００１８】その具体的構成としては、請求項６に記載
のとおり、支持部材を成形金型の可動型に設けて、可動
型で樹脂材料を加圧しつつ支持部材を成形空間外に引き
出すようにする。As a specific configuration, as described in claim 6, a supporting member is provided on a movable die of a molding die, and the supporting member is pulled out of the molding space while pressing the resin material with the movable die. I do.
【００１９】成形空間内の樹脂材料が可動型で加圧され
ているため、支持部材が可動型に引き込まれると同時に
可動型が前進して成形空間の体積を一定に保ち、可動型
の加圧力によって支持部材の除去空間に樹脂材料を流入
させることができる。支持部材の引き出しに伴う樹脂材
料の流動が回転体の可動型に対向する側に限定されるた
め回転体の位置ずれを最小限度にとどめることができ
る。Since the resin material in the molding space is pressurized by the movable mold, the supporting member is pulled into the movable mold, and at the same time, the movable mold advances to keep the volume of the molding space constant. This allows the resin material to flow into the removal space of the support member. Since the flow of the resin material due to the withdrawal of the support member is limited to the side of the rotating body facing the movable mold, the displacement of the rotating body can be minimized.
【００２０】また請求項７に記載のとおり、樹脂材料の
注入圧力によって成形空間内の樹脂材料を加圧した状態
で支持部材を成形空間から引き出すこともできる。その
具体的構成としては、請求項８に記載のとおり、回転体
が中心孔を有する筒体であり、中心孔の両端部をそれぞ
れ成形空間に出し入れ可能な支持部材で支持して回転体
を成形空間内で支持し、注入される樹脂材料を回転体の
中心孔を通して成形空間に流入させる構成が有利であ
る。Further, the supporting member can be pulled out of the molding space in a state where the resin material in the molding space is pressurized by the injection pressure of the resin material. As a specific configuration, as described in claim 8, the rotating body is a cylindrical body having a center hole, and the rotating body is formed by supporting both end portions of the center hole with support members that can be inserted into and removed from a molding space. It is advantageous that the resin material is supported in the space and the injected resin material flows into the molding space through the center hole of the rotating body.
【００２１】成形空間内の樹脂材料は、一般に回転体の
外側で冷却が早く、中心孔の内部で冷却が遅い。そのた
め上記構成によると、冷却の早い回転体の外周側で樹脂
材料の粘度が充分に高くなった時点で、両支持部材を成
形空間外に引き出すことができる。このとき、冷却の遅
い回転体の中心孔の内部では樹脂材料が流動性を有して
いるため、注入圧力によって、支持部材の除去された空
間に樹脂材料を容易に流入させて充填することができ
る。The resin material in the molding space generally cools quickly outside the rotating body and cools slowly inside the center hole. Therefore, according to the above configuration, both support members can be pulled out of the molding space when the viscosity of the resin material becomes sufficiently high on the outer peripheral side of the rotating body that is rapidly cooled. At this time, since the resin material has fluidity inside the center hole of the rotating body that is slowly cooled, the resin material can easily flow into the space from which the support member has been removed and filled by the injection pressure. it can.
【００２２】以上の成形被覆方法によると、請求項９に
記載の全外面が融着一体化したフッ素樹脂被覆層を有す
るマグネットポンプのインナーマグネットが、１回の成
形被覆によって容易に得られる。According to the above-described molding and coating method, the inner magnet of the magnet pump having the fluororesin coating layer whose entire outer surfaces are fused and integrated according to claim 9 can be easily obtained by one molding and coating.
【００２３】[0023]
【発明の実施の形態】以下、図面に基づいて本発明の実
施形態を説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００２４】図１及び図２は、樹脂被覆すべき回転体と
して、図５に示した形状のインナーマグネットに樹脂材
料を成形被覆するための成形金型の断面図であり、それ
ぞれ本発明の成形被覆方法の実施形態を示す。FIGS. 1 and 2 are sectional views of a molding die for molding and coating a resin material on an inner magnet having the shape shown in FIG. 5 as a rotating body to be coated with resin. 1 shows an embodiment of a coating method.
【００２５】図１（ａ）（ｂ）に示す成形金型１０は、
中心軸を水平に設置し、一方が端壁で閉鎖された円筒形
の固定型１１と、固定型１１の内部を摺動する可動型１
２とで構成されている。固定型１１には、先端に注入口
１３を有する円柱形ゲート部材１４端壁中心から内部に
突出しており、可動型１２には、その中心を貫通してゲ
ート部材１４に向かって前後動して注入孔１３を開閉す
る、ゲート部材１４より小径の円柱形コア部材１５が設
けられている。これらにより成形金型１０の内部にイン
ナーマグネット１６の被覆層１７の成形空間１８が形成
されている。The molding die 10 shown in FIGS. 1 (a) and 1 (b)
A cylindrical fixed mold 11 having a central axis set horizontally and one end closed by an end wall, and a movable mold 1 sliding inside the fixed mold 11
And 2. The stationary mold 11 projects inward from the center of the end wall of a cylindrical gate member 14 having an inlet 13 at the tip, and the movable mold 12 moves back and forth toward the gate member 14 through the center thereof. A cylindrical core member 15 that opens and closes the injection hole 13 and has a smaller diameter than the gate member 14 is provided. Thus, a molding space 18 for the coating layer 17 of the inner magnet 16 is formed inside the molding die 10.
【００２６】成形金型１０には、可動型１２を貫通して
成形空間１８に出し入れ可能な複数の支持部材１９が設
けられ、各支持部材１９は、先端に細径部２０を有し、
基端が駆動板２１に固定されて同時に移動する。The molding die 10 is provided with a plurality of support members 19 which can be inserted into and removed from the molding space 18 through the movable die 12, and each of the support members 19 has a small diameter portion 20 at the tip end.
The base end is fixed to the drive plate 21 and moves at the same time.
【００２７】インナーマグネット１６は、図５に示した
インナーマグネットと同様に、段付き中心孔２２を有す
る円筒状の鉄心２３の外周に複数の永久磁石２４を固定
したもので、可動型１２に対向する鉄心２３の端面に設
けた支持孔２５に、前記支持部材１９先端の細径部２０
を挿入して、インナーマグネット１６が成形空間１８内
で中心線上に保持される。The inner magnet 16 has a plurality of permanent magnets 24 fixed on the outer periphery of a cylindrical iron core 23 having a stepped center hole 22, similarly to the inner magnet shown in FIG. A small diameter portion 20 at the tip of the support member 19 is
And the inner magnet 16 is held on the center line in the molding space 18.
【００２８】インナーマグネット１６を成形空間１８内
に保持した状態で、成形空間１８内に注入孔１３から溶
融状態の樹脂材料２６が注入される。図１（ａ）は成形
空間１８内に樹脂材料２６が充満した状態を示す。With the inner magnet 16 held in the molding space 18, a molten resin material 26 is injected into the molding space 18 from the injection hole 13. FIG. 1A shows a state in which the molding material 18 is filled with the resin material 26.
【００２９】成形空間１８内に樹脂材料２６が充満する
と、コア部材１５を前進させて注入孔１３を閉じ、成形
空間１８内の樹脂材料２６を可動型１２により加圧す
る。成形空間１８内の樹脂材料２６は温度低下と共に粘
度が増加して次第に固化するが、本発明の方法では、成
形空間１８内の樹脂材料２６が適度の粘度範囲に達した
とき、可動型１２で樹脂材料２６を加圧した状態で各支
持部材１９を後退させて成形空間１８外に引き出す。各
支持部材１９が除去された空間には可動型１２の加圧力
によって樹脂材料２６が流入してインナーマグネット１
６の全外面が樹脂材料２６で覆われる。図１（ｂ）は支
持部材１９を成形空間１８外に引き出した状態を示す。When the molding material 18 is filled with the resin material 26, the core member 15 is advanced to close the injection hole 13, and the resin material 26 in the molding space 18 is pressed by the movable mold 12. The resin material 26 in the molding space 18 increases in viscosity as the temperature decreases and gradually solidifies. However, in the method of the present invention, when the resin material 26 in the molding space 18 reaches an appropriate viscosity range, the movable mold 12 While the resin material 26 is being pressed, each support member 19 is retracted and pulled out of the molding space 18. The resin material 26 flows into the space from which the support members 19 have been removed due to the pressing force of the movable mold 12, and the inner magnet 1
6 is covered with the resin material 26. FIG. 1B shows a state where the support member 19 is drawn out of the molding space 18.
【００３０】支持部材１９の支持が外されたインナーマ
グネット１６は、成形空間１８内で浮遊状態となるが、
インナーマグネット１６の周りの樹脂材料２６の粘度が
充分に高くなっておれば、インナーマグネット１６が自
重で沈下したり、引き出される支持部材１９に追従して
動くことがない。但し、支持部材１９の周りの樹脂材料
２６は、可動型１２の加圧によって支持部材１９の除去
空間に充填できる流動性を残していなければならない。
支持部材１９の除去空間への樹脂材料２６の充填が不十
分であると、その部分にボイドやピンホールが残り、従
来技術と同様の成形被覆後の充填が必要となる。従っ
て、樹脂の温度と粘度の関係、及び成形空間１８内の樹
脂材料２６の冷却進行状況から判断して、支持部材１９
の引き出しを適切な時期に行うことが重要である。The inner magnet 16 from which the support of the support member 19 has been removed floats in the molding space 18.
If the viscosity of the resin material 26 around the inner magnet 16 is sufficiently high, the inner magnet 16 does not sink by its own weight or move following the support member 19 drawn out. However, the resin material 26 around the support member 19 must have fluidity that can fill the removal space of the support member 19 by pressurizing the movable mold 12.
If the removal space of the support member 19 is not sufficiently filled with the resin material 26, voids and pinholes remain in those portions, and the same filling after forming and coating as in the related art is required. Therefore, judging from the relationship between the temperature and the viscosity of the resin and the progress of cooling of the resin material 26 in the molding space 18, the support member 19
It is important to make withdrawals at the right time.
【００３１】また、支持部材１９の除去空間に充填され
た樹脂材料２６の加圧が不十分であると、その部分に歪
みが残って冷却過程で被覆層１７にクラックが発生する
ことがあるため、支持部材１９の引き出し後、樹脂材料
２６が完全に固化するまで可動型１２による加圧を続け
て被覆層１７に歪みを残さないようにすることも重要で
ある。If the pressure of the resin material 26 filled in the removal space of the support member 19 is insufficient, distortion may remain in that portion and cracks may occur in the coating layer 17 during the cooling process. After the support member 19 is pulled out, it is also important that the pressurization by the movable mold 12 is continued until the resin material 26 is completely solidified so that no distortion remains in the coating layer 17.
【００３２】成形空間１８内で樹脂材料２６が完全に固
化すると成形金型１０を開いて、成形被覆が完了したイ
ンナーマグネット１６を取り出し、支持部材１９の引き
出しによって被覆層１７の表面にできた突起２７の削り
落としなど、被覆層１７に必要な外面仕上げ加工を施す
と、全外面が完全に融着一体化した被覆層を有する、図
５に示したものと同形状のインナーマグネットが完成す
る。When the resin material 26 is completely solidified in the molding space 18, the molding die 10 is opened, the inner magnet 16, which has been molded and coated, is taken out, and the protrusion formed on the surface of the coating layer 17 by pulling out the support member 19. When the coating layer 17 is subjected to necessary external surface finishing such as cutting off of the 27, an inner magnet having the same shape as that shown in FIG. 5 having the coating layer whose entire outer surface is completely fused and integrated is completed.
【００３３】図１に示す成型金型１０では、支持部材１
９が可動型１２に設けられているため、支持部材１９が
可動型１２に引き込まれると同時に可動型１２が前進し
て、成形空間１８の体積を一定に保ち、可動型１２の加
圧力によって、支持部材１９が除去された空間に樹脂材
料２６を充填することができる。このように支持部材１
９の引き出しに、及び引き出し空間への樹脂材料２６の
充填に伴う成形空間１８内の樹脂材料２６の動きがイン
ナーマグネット１６の可動型１２に対向する側に限定さ
れるため、支持部材１９が外れた後のインナーマグネッ
ト１６の動きを最小限度にとどめ、偏心量を0.05〜0.3
mm以下に抑えることができる。In the molding die 10 shown in FIG.
Since the movable die 12 is provided with the support member 19, the movable die 12 advances at the same time as the support member 19 is pulled into the movable die 12, and the volume of the molding space 18 is kept constant. The space from which the support member 19 has been removed can be filled with the resin material 26. Thus, the support member 1
Since the movement of the resin material 26 in the molding space 18 due to the drawing of the resin material 9 and the filling of the resin material 26 into the drawing space is limited to the side of the inner magnet 16 facing the movable mold 12, the support member 19 comes off. After that, the movement of the inner magnet 16 is minimized, and the amount of eccentricity is 0.05 to 0.3.
mm or less.
【００３４】図２（ａ）（ｂ）に示す成形金型３０は、
本発明の方法の別の形態を実施するためのものである
が、樹脂被覆される回転体が、前記形態のものと同一形
状のインナーマグネット１６であるため、成形金型１０
と機能が共通する部材には、図１と同一の符号を使用す
る。The molding die 30 shown in FIGS.
In order to carry out another embodiment of the method of the present invention, since the rotating body to be coated with the resin is the inner magnet 16 having the same shape as that of the above-described embodiment, the molding die 10 is used.
The same reference numerals are used for members having the same functions as those in FIG.
【００３５】成形金型３０では、固定型１１とゲート部
材１４の間、及び可動型１２とコア部材１５の間に、そ
れぞれ支持部材３１、３２が設けられ、成形空間１８内
でインナーマグネット１６が支持部材３１、３２によっ
て両側で支持される。支持部材３１、３２は、図３に示
すように、それぞれゲート部材１４、又はコア部材１５
の外面を軸方向に摺動可能な円筒体３３、３４の前端に
複数の支持片３５を突設したもので、支持片３５の先端
に設けた切欠き３６が、鉄心の段付き中心孔２２の各端
縁に係合して、インナーマグネット１６を成形空間１８
の中心線上で保持する。注入孔１３から注入される樹脂
材料２６は中心孔２２の両端部を通って成形空間１８に
充満する。図２（ａ）は、成型空間１８に樹脂材料２６
が充満した状態を示す。In the molding die 30, supporting members 31 and 32 are provided between the fixed die 11 and the gate member 14 and between the movable die 12 and the core member 15, respectively. It is supported on both sides by support members 31 and 32. As shown in FIG. 3, the support members 31 and 32 are respectively provided with the gate member 14 or the core member 15.
A plurality of supporting pieces 35 are provided at the front ends of cylindrical bodies 33 and 34 slidable in the axial direction on the outer surface of the core. A notch 36 provided at the tip of the supporting piece 35 is provided with a stepped center hole 22 of the iron core. Of the inner magnet 16 and the molding space 18
Hold on the center line of. The resin material 26 injected from the injection hole 13 fills the molding space 18 through both ends of the center hole 22. FIG. 2A shows that the resin material 26 is formed in the molding space 18.
Indicates a state of being filled.
【００３６】成形空間１８内の樹脂材料２６は、一般に
インナーマグネット１６の外周側で冷却が早く、中心孔
２２の内部で冷却が遅くなる。そのため、冷却が早いイ
ンナーマグネット１６の外周側で樹脂材料２６が充分高
い粘度に達すると、支持部材３１、３２をそれぞれ外側
にスライドさせて成形空間１８外に引き出すことができ
る。このとき、冷却の遅い中心孔２１の内部では樹脂材
料２６が流動性を有しているため、注入圧力によって支
持部材３１、３２が除去された空間に溶融樹脂２６を容
易に流入させて充填することができる。図２（ｂ）は支
持部材３１、３２を成形空間１８から引き出した状態を
示す。The resin material 26 in the molding space 18 generally cools faster on the outer peripheral side of the inner magnet 16 and slows down in the center hole 22. Therefore, when the resin material 26 reaches a sufficiently high viscosity on the outer peripheral side of the inner magnet 16 that cools quickly, the support members 31 and 32 can be slid outward and pulled out of the molding space 18. At this time, since the resin material 26 has fluidity inside the central hole 21 where cooling is slow, the molten resin 26 easily flows into the space from which the support members 31 and 32 have been removed by the injection pressure and is filled. be able to. FIG. 2B shows a state in which the support members 31 and 32 are drawn out of the molding space 18.
【００３７】支持部材３１、３２を成形空間１８から引
き出した後、コア部材１５を前進させて注入口１３を閉
じ、成形空間１８内の樹脂材料２６が完全に固化するま
で可動型１２によって樹脂材料２６を加圧して充填部分
の歪みを防止する。樹脂材料２６が完全に固化すると成
形金型３０を開いて、成形被覆が完了したインナーマグ
ネット１６を取り出し、支持部材３１、３２の引き抜き
によってできた突起３７、３８の削り落としなど、必要
な外面仕上げ加工を施すと、全外面が融着一体化した被
覆層を有する、図５に示したものと同形状のインナーマ
グネットが完成する。After the support members 31, 32 are drawn out of the molding space 18, the core member 15 is advanced to close the injection port 13, and the resin material 26 is moved by the movable mold 12 until the resin material 26 in the molding space 18 is completely solidified. 26 is pressurized to prevent distortion of the fill. When the resin material 26 is completely solidified, the molding die 30 is opened, the inner magnet 16 for which the molding and coating is completed is taken out, and necessary outer surface finishing such as shaving off the projections 37 and 38 formed by pulling out the support members 31 and 32 is performed. By performing the processing, an inner magnet having the same shape as that shown in FIG. 5 having a coating layer whose entire outer surfaces are fused and integrated is completed.
【００３８】一般にマグネットポンプのインナーマグネ
ットは中心孔を有する筒体であるために、インナーマグ
ネットの外周と中心孔の内部とで樹脂材料の冷却速度に
差が生じ、冷却速度の差によって生じる樹脂材料の粘度
の差を利用することにより、支持部材の引き出し可能時
期を拡大することができる。Generally, since the inner magnet of the magnet pump is a cylindrical body having a center hole, a difference occurs in the cooling rate of the resin material between the outer periphery of the inner magnet and the inside of the center hole, and the resin material generated by the difference in the cooling rate. By utilizing the difference in the viscosity of the support member, the time at which the support member can be pulled out can be extended.
【００３９】なお、本発明の成形被覆方法を実施する装
置の構成については、上記のインナーマグネット等、樹
脂被覆すべき回転体の形状に応じて成形金型の形状が異
なり、支持部材の形状や支持位置も異なるため、上記の
成形金型１０、３０以外に各種構成のものが使用でき
る。The configuration of the apparatus for carrying out the molding and coating method of the present invention differs in the shape of the molding die depending on the shape of the rotating body to be coated with resin, such as the inner magnet, and the shape of the supporting member and the like. Since the supporting positions are also different, those having various configurations other than the above-described molding dies 10 and 30 can be used.
【００４０】[0040]
【発明の効果】以上のとおり、本発明の成形被覆方法に
よると、フッ素樹脂のような融着が難しい樹脂材料であ
っても、１回の成形被覆によりインナーマグネット等の
回転体の全外面に一体融着した被覆層を形成することが
でき、支持部材を引き出しを適切な時期に行うことによ
り回転体の偏心量を問題のない範囲に抑えることができ
る。As described above, according to the molding and coating method of the present invention, even if a resin material such as a fluororesin is difficult to be fused, it can be applied to the entire outer surface of a rotating body such as an inner magnet by a single molding and coating. An integrally fused coating layer can be formed, and by pulling out the support member at an appropriate time, the amount of eccentricity of the rotating body can be suppressed to a range where there is no problem.
【図１】 本発明の方法を実施する成形金型の断面図FIG. 1 is a cross-sectional view of a molding die for implementing the method of the present invention.
【図２】 本発明の方法を実施する別の形態の成形金型
の断面図FIG. 2 is a cross-sectional view of another form of a molding die for implementing the method of the present invention.
【図３】 図２の装置で使用する支持部材の図FIG. 3 is a view of a support member used in the apparatus of FIG.
【図４】 本発明の適用対象となるマグネットポンプの
断面図FIG. 4 is a sectional view of a magnet pump to which the present invention is applied.
【図５】 樹脂被覆したインナーマグネットの断面図FIG. 5 is a cross-sectional view of a resin-coated inner magnet.
【図６】 樹脂被覆と同時に羽根車を一体成形したイン
ナーマグネットの断面図FIG. 6 is a cross-sectional view of an inner magnet in which an impeller is integrally formed at the same time as resin coating.
１０、３０・・・成形金型 １１・・・固定型 １２・・・可動型 １３・・・注入孔 １４・・・ゲート部材 １５・・・コア部材 １６・・・インナーマグネット １７・・・被覆層 １８・・・成形空間 １９、３１、３２・・・支持部材 ２１・・・支持部材の駆動板 ２６・・・樹脂材料 10, 30 ... Molding die 11 ... Fixed mold 12 ... Movable mold 13 ... Injection hole 14 ... Gate member 15 ... Core member 16 ... Inner magnet 17 ... Coating Layer 18: Molding space 19, 31, 32: Support member 21: Driving plate of support member 26: Resin material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 殿谷 三郎 兵庫県尼崎市水堂町４丁目１番31号 セイ コー化工機株式会社ポンプ事業部内 Ｆターム(参考） 4F204 AA16 AD03 AH04 FA01 FB01 FB12 FB23 FF05 FN11 FQ15 4F206 AA16 AD03 AH04 JA02 JA03 JB12 JB23 JF01 JF05 JM04 JN11 JQ81 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Saburo Tonotani 4-1-1, Mizumachi-cho, Amagasaki-shi, Hyogo Seiko Kakoki Co., Ltd. Pump Division F-term (reference) 4F204 AA16 AD03 AH04 FA01 FB01 FB12 FB23 FF05 FN11 FQ15 4F206 AA16 AD03 AH04 JA02 JA03 JB12 JB23 JF01 JF05 JM04 JN11 JQ81
Claims (9)
支持部材で回転体を成型空間内で支持し、成形空間内に
溶融樹脂材料を注入して成形空間内の樹脂材料を加圧し
た状態で、樹脂材料が完全に固化する前に支持部材を成
形空間外に引き出すことを特徴とする回転体の成形被覆
方法。1. A rotating member is supported in a molding space by a support member which can be taken in and out of a molding space of a molding die, and a molten resin material is injected into the molding space to pressurize the resin material in the molding space. A method of forming and coating a rotating body, wherein the support member is drawn out of the molding space before the resin material is completely solidified in the state.
ーマグネットである請求項１記載の成形被覆方法。2. The method according to claim 1, wherein the rotating body is an inner magnet of a magnet pump.
が完全に固化するまで樹脂材料の加圧を続ける請求項１
記載の成形被覆方法。3. The method according to claim 1, wherein after the support member is pulled out, the pressure of the resin material is continued until the resin material is completely solidified.
The molding and coating method as described above.
１記載の成形被覆方法。4. The method according to claim 1, wherein the resin material is a fluororesin.
し、回転体の支持側から成形空間内の樹脂材料を加圧す
る請求項１記載の成形被覆方法。5. The method according to claim 1, wherein the rotating body is supported on one side in the molding space, and the resin material in the molding space is pressed from the supporting side of the rotating body.
て、可動型で成形空間内の樹脂材料を加圧した状態で支
持部材を成形空間外に引き出す請求項５記載の成形被覆
方法。6. The molding and coating method according to claim 5, wherein the supporting member is provided on a movable die of a molding die, and the supporting member is pulled out of the molding space while the resin material in the molding space is pressed by the movable die. .
の樹脂材料を加圧した状態で、支持部材を成形空間から
引き出す請求項１記載の成形被覆方法。7. The molding and coating method according to claim 1, wherein the support member is drawn out of the molding space while the resin material in the molding space is pressurized by the injection pressure of the resin material.
り、中心孔の両端部をそれぞれ成形空間に出し入れ可能
な支持部材で保持して回転体を成形空間内で支持し、注
入される樹脂材料を回転体の中心孔を通して成形空間に
流入させる請求項７記載の成形被覆方法。8. The rotating body is a cylindrical body having a center hole, and both ends of the center hole are held by supporting members that can be inserted into and removed from the molding space, and the rotating body is supported in the molding space and injected. The molding and coating method according to claim 7, wherein the resin material is caused to flow into the molding space through the center hole of the rotating body.
層を有するマグネットポンプのインナーマグネット。9. An inner magnet for a magnet pump having a fluororesin coating layer whose entire outer surface is fused and integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP891999A JP2000205173A (en) | 1999-01-18 | 1999-01-18 | Method for coating rotator by molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP891999A JP2000205173A (en) | 1999-01-18 | 1999-01-18 | Method for coating rotator by molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000205173A true JP2000205173A (en) | 2000-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP891999A Pending JP2000205173A (en) | 1999-01-18 | 1999-01-18 | Method for coating rotator by molding |
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| JP (1) | JP2000205173A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004190562A (en) * | 2002-12-11 | 2004-07-08 | Matsushita Electric Ind Co Ltd | Small vortex pump |
| JP2008523309A (en) * | 2004-12-10 | 2008-07-03 | サンダイン コーポレーション | Magnetic drive element |
| JP2009197729A (en) * | 2008-02-22 | 2009-09-03 | Mitsubishi Electric Corp | Rotor of motor for pump, motor for pump, pump, and method for manufacturing rotor of motor for pump |
| KR100986474B1 (en) * | 2007-10-10 | 2010-10-08 | 파나소닉 전공 주식회사 | Method for manufacturing rotor unit of motor-integrated pump and motor integrated pump including the rotor unit |
| JP2017072145A (en) * | 2017-01-31 | 2017-04-13 | ミネベアミツミ株式会社 | Impeller and fan motor equipped with the same |
-
1999
- 1999-01-18 JP JP891999A patent/JP2000205173A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004190562A (en) * | 2002-12-11 | 2004-07-08 | Matsushita Electric Ind Co Ltd | Small vortex pump |
| JP2008523309A (en) * | 2004-12-10 | 2008-07-03 | サンダイン コーポレーション | Magnetic drive element |
| JP4854673B2 (en) * | 2004-12-10 | 2012-01-18 | サンダイン コーポレーション | Magnetic drive element |
| US8333666B2 (en) | 2004-12-10 | 2012-12-18 | Sundyne Corporation | Inner drive for magnetic drive pump |
| US20130106018A1 (en) * | 2004-12-10 | 2013-05-02 | Sundyne Corporation | Inner drive for magnetic drive pump |
| US9362050B2 (en) | 2004-12-10 | 2016-06-07 | Sundyne, Llc | Inner drive for magnetic drive pump |
| KR100986474B1 (en) * | 2007-10-10 | 2010-10-08 | 파나소닉 전공 주식회사 | Method for manufacturing rotor unit of motor-integrated pump and motor integrated pump including the rotor unit |
| JP2009197729A (en) * | 2008-02-22 | 2009-09-03 | Mitsubishi Electric Corp | Rotor of motor for pump, motor for pump, pump, and method for manufacturing rotor of motor for pump |
| JP2017072145A (en) * | 2017-01-31 | 2017-04-13 | ミネベアミツミ株式会社 | Impeller and fan motor equipped with the same |
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