JPH1092247A - Tapered polymer porcelain tube molding method - Google Patents
Tapered polymer porcelain tube molding methodInfo
- Publication number
- JPH1092247A JPH1092247A JP24044996A JP24044996A JPH1092247A JP H1092247 A JPH1092247 A JP H1092247A JP 24044996 A JP24044996 A JP 24044996A JP 24044996 A JP24044996 A JP 24044996A JP H1092247 A JPH1092247 A JP H1092247A
- Authority
- JP
- Japan
- Prior art keywords
- tapered
- mold
- core member
- forming
- hollow core
- 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
- 229920000642 polymer Polymers 0.000 title claims abstract description 40
- 238000000465 moulding Methods 0.000 title claims abstract description 23
- 229910052573 porcelain Inorganic materials 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000012212 insulator Substances 0.000 claims description 19
- 229920001971 elastomer Polymers 0.000 abstract description 19
- 238000006073 displacement reaction Methods 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 238000012805 post-processing Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Insulators (AREA)
- Insulating Bodies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポリマー碍管成形
用金型を用いるテーパ形状ポリマー碍管の成形方法に関
するものである。ここに、ポリマー碍管とは、繊維強化
プラスチック製の中空コア部材及びこの中空コア部材の
外周面に絶縁性高分子材料で形成した外被とを有する。
一般には、外被は、中空コア部材の外周面に沿って伸び
る円筒状のシース部と軸方向に互いに離間して形成され
る複数の笠部とから形成されている。絶縁性高分子材料
としては、例えばシリコーンゴム、エチレン−プロピレ
ン共重合体（ＥＰＭ）、エチレン−プロピレン−ジエン
共重合体（ＥＰＤＭ）等が用いられる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a tapered polymer insulator using a polymer insulator mold. Here, the polymer insulator has a hollow core member made of fiber reinforced plastic and a jacket formed of an insulating polymer material on the outer peripheral surface of the hollow core member.
Generally, the jacket is formed of a cylindrical sheath portion extending along the outer peripheral surface of the hollow core member, and a plurality of cap portions formed apart from each other in the axial direction. As the insulating polymer material, for example, silicone rubber, ethylene-propylene copolymer (EPM), ethylene-propylene-diene copolymer (EPDM) and the like are used.
【０００２】[0002]
【従来の技術】従来、ポリマー碍管成形用金型を用いて
テーパ形状のポリマー碍管を成形する場合、テーパ形状
の中空コア部材を金型内に配置し型締めをした後、この
テーパ形状の中空コア部材と金型との間に形成されるシ
ース部および笠部とを形成するためのテーパ形状の外被
形成用空隙に外被形成材料を充填し、金型の温度を所定
の外被形成材料硬化温度まで上昇させ、この温度に所定
の時間保持することによって、外被形成材料を硬化させ
ていた。2. Description of the Related Art Conventionally, when forming a tapered polymer insulator using a mold for forming a polymer insulator, a tapered hollow core member is placed in a mold, the mold is clamped, and then the tapered hollow is formed. A taper-shaped space for forming a sheath for forming a sheath portion and a cap portion formed between a core member and a mold is filled with a sheath forming material, and the temperature of the mold is set to a predetermined value. By raising the temperature to the material curing temperature and maintaining the temperature for a predetermined time, the material for forming the jacket is cured.
【０００３】図２は上述した従来のテーパ形状のポリマ
ー碍管を成形する方法を説明するための図である。図２
に示す例において、５１は２分割されて形成された１対
のポリマー碍管成形用金型である。この金型５１の内部
には、シース部および笠部を形成するための外被形成用
空隙５１ａおよび５１ｂをテーパ形状の中空コア部材と
してのＦＲＰコア５２ともに構成している。５３−１、
５３−２はＦＲＰコア５２の両端に設けられ、シース部
と重なり合う部分以外は金型５１外に露出する大径側お
よび小径側のフランジ金具である。１対の金型５１は、
図示しないプランジャー等からなる金型開閉手段によ
り、型開きおよび型締めの各動作を行なうことができ
る。そして、フランジ金具５３−１、５３−２およびこ
れらフランジ金具５３−１、５３−２間に設けられたＦ
ＲＰコア５２の金型５１内での位置決めは、型締めした
状態で金型５１の両端部がフランジ金具５３−１、５３
−２を挟むことで行っている。FIG. 2 is a diagram for explaining a method of forming the above-mentioned conventional tapered polymer porcelain tube. FIG.
In the example shown in FIG. 1, reference numeral 51 denotes a pair of polymer porcelain molds formed in two parts. Inside the mold 51, outer cover forming gaps 51 a and 51 b for forming a sheath portion and a cap portion are formed together with an FRP core 52 as a tapered hollow core member. 53-1,
Reference numerals 53-2 denote large-diameter and small-diameter flanges which are provided at both ends of the FRP core 52 and are exposed outside the mold 51 except for portions overlapping the sheath portion. The pair of molds 51
The mold opening / closing means including a plunger (not shown) can open and close the mold. Then, the flanges 53-1 and 53-2 and the F provided between the flanges 53-1 and 53-2 are provided.
The positioning of the RP core 52 in the mold 51 is performed by fixing both ends of the mold 51 to the flange metal fittings 53-1 and 53 in a state where the mold is clamped.
-2 is inserted.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
た構成のテーパ形状のポリマー碍管の成形方法では、金
型５１の内部の外被形成用空隙に外被形成材料としての
ゴムを充填した後、金型５１の温度を所定のゴムが硬化
する温度まで上昇させる必要がある。ゴムは加熱硬化す
る際膨張するので金型内の内圧は上昇し、しかも、ゴム
が金型５１に接した部分から内部のＦＲＰコア５２方向
へ向かって徐々に硬化していくこと及びＦＲＰコア５２
がテーパ形状であることから、ゴムの膨張による内圧は
大径のフランジ金具５３−１方向への軸力として作用し
ていた。However, in the method for forming a tapered polymer porcelain tube having the above-described structure, the space for forming the jacket inside the mold 51 is filled with rubber as a material for forming the jacket, and then the metal is filled. It is necessary to raise the temperature of the mold 51 to a temperature at which a predetermined rubber is cured. Since the rubber expands when it is cured by heating, the internal pressure in the mold rises, and the rubber gradually cures from the portion in contact with the mold 51 toward the FRP core 52 inside the mold.
Is tapered, the internal pressure due to the expansion of the rubber acts as an axial force in the direction of the large-diameter flange fitting 53-1.
【０００５】このとき、上述した従来の成形方法では、
フランジ金具５３−１、５３−２を金型５１の端部で挟
んで固定しているだけであるため、発生した大径方向へ
の軸力により、ＦＲＰコア５２が大径方向に移動してし
まい、ＦＲＰコア５２に対する外被の位置ずれが発生す
る問題があった。この位置ずれは、長さが１．８ｍ程度
のポリマー碍管において３〜４ｍｍ程度であり、ポリマ
ー碍管の両端部のフランジ金具５３−１、５３−２とゴ
ムとの間のシール部のシール性能の劣化は発生しない。
しかし、大径側のフランジ金具５３−１とゴムとのシー
ル部では、外被の位置ずれによるひけが生じるという問
題があった。一方、小径側のフランジ金具５３−２とゴ
ムとのシール部では、ゴムがフランジ金具５３−２のシ
ール面を越えて乗り上げバリが発生し、このバリを除去
しなければならない問題があった。At this time, in the conventional molding method described above,
Since the flange metal fittings 53-1 and 53-2 are merely sandwiched and fixed between the ends of the mold 51, the generated axial force in the large-diameter direction causes the FRP core 52 to move in the large-diameter direction. As a result, there has been a problem that the position of the jacket with respect to the FRP core 52 is shifted. This displacement is about 3 to 4 mm in the polymer insulator having a length of about 1.8 m, and the sealing performance of the seal portion between the rubber and the flange metal fittings 53-1 and 53-2 at both ends of the polymer insulator. No degradation occurs.
However, in the seal portion between the large-diameter flanged metal fitting 53-1 and the rubber, there is a problem that sink occurs due to displacement of the jacket. On the other hand, in the sealing portion between the flange metal fitting 53-2 on the small diameter side and the rubber, the rubber runs over the sealing surface of the flange metal fitting 53-2, and burrs are generated, and there is a problem that the burrs must be removed.
【０００６】本発明の目的は上述した課題を解消して、
ＦＲＰコアに対する外被ゴムの位置ずれがなく、補修の
ための後加工の必要がないテーパ形状ポリマー碍管の成
形方法を提供しようとするものである。An object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide a method for forming a tapered polymer insulator tube that does not cause displacement of a jacket rubber with respect to an FRP core and does not require post-processing for repair.
【０００７】[0007]
【課題を解決するための手段】本発明のテーパ形状ポリ
マー碍管の成形方法は、テーパ形状のポリマー碍管の成
形方法であって、ポリマー碍管成形用金型内にテーパ形
状の中空コア部材を配置し、中空コア部材の回りのテー
パ形状の外被形成用空隙に外被形成材料を充填し、金型
を所定の外被形成材料硬化温度まで加熱し外被形成材料
を硬化させるテーパ形状ポリマー碍管の成形方法におい
て、中空コア部材を、ポリマー碍管成形用金型内におい
て、テーパ形状の中空コア部材の小径方向へ予めずらし
てセットすることを特徴とするものである。The method of forming a tapered polymer insulator according to the present invention is a method of forming a tapered polymer insulator, wherein a hollow core member having a tapered shape is disposed in a mold for forming a polymer insulator. A tapered polymer porcelain tube in which a material for forming a jacket is filled into a tapered jacket-forming space around a hollow core member, and a mold is heated to a predetermined jacket-forming material curing temperature to cure the jacket-forming material. In the molding method, the hollow core member is set in a mold for forming a polymer insulator tube so as to be shifted in the small-diameter direction of the tapered hollow core member in advance.
【０００８】本発明では、予めその中空コア部材の位置
変化の分だけ小径方向に位置して中空コア部材を金型内
にセットしているため、成形時に大径方向へ作用する軸
力によって金型内の中空コア部材の位置が大径方向へ変
化しても、製品として得られるテーパ形状ポリマー碍管
においては、中空コア部材に対する外被ゴムの位置ずれ
を無くすことができる。その結果、従来ポリマー碍管の
両端部に生じていた隙間やバリの発生を無くすことがで
き、補修のための後加工も必要でない。In the present invention, since the hollow core member is set in the mold in advance in the small-diameter direction by the position change of the hollow core member, the axial force acting in the large-diameter direction at the time of molding causes the metal core to be set. Even if the position of the hollow core member in the mold changes in the large-diameter direction, in the tapered polymer porcelain tube obtained as a product, the displacement of the outer rubber with respect to the hollow core member can be eliminated. As a result, gaps and burrs which have conventionally occurred at both ends of the polymer insulator can be eliminated, and post-processing for repair is not required.
【０００９】[0009]
【発明の実施の形態】図１（ａ）、（ｂ）はそれぞれ本
発明のテーパ形状ポリマー碍管の成形方法を実施する際
の状態を示す図であり、図１（ａ）は成形が終了した状
態を、図１（ｂ）は成形前の状態を、それぞれ示してい
る。図１に示す例において、１は２分割された１対の金
型１−１および１−２で構成されるポリマー碍管成形用
金型である。この金型１の内部には、シース部および笠
部を形成するための外被形成用空隙１ａおよび１ｂをテ
ーパ形状の中空コア部材としてのＦＲＰコア２とともに
構成している。３−１、３−２はＦＲＰコア２の両端に
設けられた大径側および小径側のフランジ金具である。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 (a) and 1 (b) are views showing a state in which a method for forming a tapered polymer porcelain tube according to the present invention is carried out, and FIG. FIG. 1B shows a state before molding, respectively. In the example shown in FIG. 1, reference numeral 1 denotes a polymer porcelain tube molding die composed of a pair of dies 1-1 and 1-2 divided into two parts. Inside the mold 1, envelope forming gaps 1 a and 1 b for forming a sheath portion and a cap portion are formed together with an FRP core 2 as a tapered hollow core member. Reference numerals 3-1 and 3-2 denote large-diameter and small-diameter flanges provided at both ends of the FRP core 2, respectively.
【００１０】１対の金型１−１、１−２は、図示しない
金型開閉手段により、型開きおよび型締めの各動作を行
なうことができる。そして、型締めした状態で金型１の
両端部がフランジ金具３−１、３−２を挟むことで、フ
ランジ金具３−１、３−２およびこれらフランジ金具３
−１、３−２間に設けられたＦＲＰコア２の金型１内で
の固定および位置決めを行っている。上記構成は従来の
ものと同じである。The pair of molds 1-1 and 1-2 can perform mold opening and mold closing operations by mold opening / closing means (not shown). Then, the both ends of the mold 1 sandwich the flange fittings 3-1 and 3-2 in the clamped state, so that the flange fittings 3-1 and 3-2 and these flange fittings 3-3 are formed.
-1, 3-2 are fixed and positioned in the mold 1 of the FRP core 2. The above configuration is the same as the conventional one.
【００１１】本発明の成形方法で重要な点は、図１
（ａ）に示す最終的に必要な金型１に対するフランジ金
具３−１、３−２およびＦＲＰコア２の位置を考慮し
て、図１（ｂ）に示すように、テーパ形状のＦＲＰコア
２を小径方向へＸだけ予めずらしてセットすることであ
る。このずれ量Ｘは特に限定するものではなく、小径方
向にテーパ形状のＦＲＰコア２をずらしてセットしさえ
すれば、本発明を達成することができる。実際このずれ
量Ｘは、上述したように長さが１．８ｍ程度のポリマー
碍管において３〜４ｍｍ程度であることがわかってい
る。An important point of the molding method of the present invention is that FIG.
In consideration of the positions of the flange metal fittings 3-1 and 3-2 and the FRP core 2 with respect to the finally required mold 1 shown in (a), the tapered FRP core 2 as shown in FIG. Is shifted in advance in the small diameter direction by X in advance. The shift amount X is not particularly limited, and the present invention can be achieved as long as the tapered FRP core 2 is shifted and set in the small diameter direction. Actually, it has been found that the displacement X is about 3 to 4 mm in the polymer insulator having a length of about 1.8 m as described above.
【００１２】しかし、厳密にＦＲＰコア２に対する外被
ゴムの位置ずれを無くすためには、この位置ずれ量Ｘ
を、成形中のゴムの膨張により生じる大径方向への軸力
によるテーパ形状ＦＲＰコア２の大径方向への移動量と
一致させることが好ましい。この移動量は、予め形状の
同じ金型、ＦＲＰコア、フランジ金具を使用して実際に
外被ゴムとして使用する例えばシリコーンゴムを使い、
実際の成形を模擬した試験を行ないＦＲＰコア２の大径
方向への移動量を求めることで決定することができる。
また、軸力に関係する成形温度、内圧、成形空間、硬化
状態を予め設定して模擬した計算により、この移動量を
求めることもできる。However, in order to strictly eliminate the displacement of the jacket rubber with respect to the FRP core 2, the displacement X
Is preferably matched with the movement amount of the tapered FRP core 2 in the large diameter direction due to the axial force in the large diameter direction caused by the expansion of the rubber during molding. The amount of movement is, for example, using silicone rubber, which is actually used as a jacket rubber using a mold having the same shape, FRP core, and flange fitting,
It can be determined by performing a test simulating actual molding and obtaining the amount of movement of the FRP core 2 in the large diameter direction.
Further, the amount of movement can also be obtained by a calculation in which a molding temperature, an internal pressure, a molding space, and a curing state related to the axial force are set in advance and simulated.
【００１３】本発明のテーパ形状ポリマー碍管の成形は
以下のようにして行われる。まず金型１−１、１−２を
開き、単部にフランジ金具３−１および３−２を設置し
たＦＲＰコア２を金型１−１、１−２の間にセットす
る。その後、金型１−１、１−２を閉じて、フランジ金
具３−１および３−２の部分を金型１−１、１ー２で挟
み、ＦＲＰコア２を金型１に対して位置決めして固定す
る。この際、上述したように、最終的なＦＲＰコア２の
位置よりも好ましくはずれ量Ｘだけ小径方向にＦＲＰコ
ア２の位置をずらしてセットする必要がある。次に、図
示しない外被形成用のゴム注入口から、金型１内の外被
形成用空隙１ａおよび１ｂ内に例えばシリコーンゴムを
注入する。この状態で外被形成用のゴムが加硫硬化する
温度まで加熱してゴムを硬化させて、最終的なテーパ形
状ポリマー碍管を得ている。The molding of the tapered polymer porcelain tube of the present invention is performed as follows. First, the molds 1-1 and 1-2 are opened, and the FRP core 2 having the flange fittings 3-1 and 3-2 provided in a single part is set between the molds 1-1 and 1-2. Then, the molds 1-1 and 1-2 are closed, the flange fittings 3-1 and 3-2 are sandwiched between the molds 1-1 and 1-2, and the FRP core 2 is positioned with respect to the mold 1. And fix it. At this time, as described above, it is necessary to set the FRP core 2 so that the position of the FRP core 2 is shifted from the final position of the FRP core 2 by a shift amount X in the small diameter direction, preferably. Next, for example, silicone rubber is injected into the jacket forming gaps 1a and 1b in the mold 1 from a jacket forming rubber injection port (not shown). In this state, the rubber is hardened by heating to a temperature at which the rubber for forming the jacket is vulcanized and cured, and a final tapered polymer porcelain tube is obtained.
【００１４】[0014]
【発明の効果】以上の説明から明かなように、本発明に
よれば、成形中のテーパ形状の中空コア部材の移動を考
慮して、成形前に予め中空コア部材を金型内において小
径側へずらしてセットしているため、成形時に大径方向
へ作用する軸力によって金型内の中空コア部材の位置が
大径方向へ変化しても、製品として得られるテーパ形状
ポリマー碍管においては、中空コア部材に対する外被ゴ
ムの位置ずれを無くすことができる。その結果、従来ポ
リマー碍管の両端部に生じていたひけやバリの発生を無
くすことができ、補修のための後加工も必要でない。As is apparent from the above description, according to the present invention, in consideration of the movement of the tapered hollow core member during molding, the hollow core member is preliminarily molded into the mold at the small diameter side before molding. Even if the position of the hollow core member in the mold changes in the large-diameter direction due to the axial force acting in the large-diameter direction at the time of molding, in the tapered polymer insulator tube obtained as a product, The displacement of the jacket rubber with respect to the hollow core member can be eliminated. As a result, sinks and burrs, which have conventionally occurred at both ends of the polymer insulator tube, can be eliminated, and post-processing for repair is not required.
【図１】本発明のテーパ形状ポリマー碍管の成形方法を
説明するための図である。FIG. 1 is a view for explaining a method for forming a tapered polymer porcelain tube of the present invention.
【図２】従来のテーパ形状ポリマー碍管の成形方法を説
明するための図である。FIG. 2 is a view for explaining a conventional method for forming a tapered polymer porcelain tube.
１ ポリマー碍管成形用金型、１−１、１−２ 金型、
１ａ、１ｂ 外被形成用空隙、２ ＦＲＰコア、３−
１、３−２ フランジ金具、Ｘ ずれ量1 mold for polymer insulator tube molding, 1-1, 1-2 mold,
1a, 1b Void for forming jacket, 2 FRP core, 3-
1, 3-2 Flange bracket, X displacement
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｌ 31:34 ──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. 6 Identification code FI B29L 31:34
Claims (2)
って、ポリマー碍管成形用金型内にテーパ形状の中空コ
ア部材を配置し、中空コア部材の回りのテーパ形状の外
被形成用空隙に外被形成材料を充填し、金型を所定の外
被形成材料硬化温度まで加熱し外被形成材料を硬化させ
るテーパ形状ポリマー碍管の成形方法において、中空コ
ア部材を、ポリマー碍管成形用金型内において、テーパ
形状の中空コア部材の小径方向へ予めずらしてセットす
ることを特徴とするテーパ形状ポリマー碍管の成形方
法。1. A method for forming a tapered polymer porcelain tube, comprising: placing a tapered hollow core member in a polymer porcelain tube molding die; and forming a tapered outer jacket forming space around the hollow core member. In a method for forming a tapered polymer porcelain tube in which a jacket material is filled and a mold is heated to a predetermined jacket material curing temperature and the jacket material is cured, the hollow core member is placed inside the polymer insulator tube molding mold. 2. The method for forming a tapered polymer porcelain tube according to claim 1, wherein the tapered hollow core member is set in advance in a small diameter direction.
型内における中空コア部材の小径方向へのずらし量を、
成形中の外被形成材料の膨張により生じる大径方向への
軸力によるテーパ形状中空コア部材の大径方向への移動
量とする請求項１記載のテーパ形状ポリマー碍管の成形
方法。2. The amount of shift of the hollow core member in the small-diameter direction in the mold for molding a polymer insulator tube,
2. The method for forming a tapered polymer porcelain tube according to claim 1, wherein the amount of movement of the tapered hollow core member in the large diameter direction is caused by axial force in the large diameter direction caused by expansion of the jacket material during molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24044996A JPH1092247A (en) | 1996-09-11 | 1996-09-11 | Tapered polymer porcelain tube molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24044996A JPH1092247A (en) | 1996-09-11 | 1996-09-11 | Tapered polymer porcelain tube molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1092247A true JPH1092247A (en) | 1998-04-10 |
Family
ID=17059673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24044996A Pending JPH1092247A (en) | 1996-09-11 | 1996-09-11 | Tapered polymer porcelain tube molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1092247A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8964025B2 (en) | 2011-04-12 | 2015-02-24 | International Business Machines Corporation | Visual obstruction removal with image capture |
-
1996
- 1996-09-11 JP JP24044996A patent/JPH1092247A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8964025B2 (en) | 2011-04-12 | 2015-02-24 | International Business Machines Corporation | Visual obstruction removal with image capture |
| US9191642B2 (en) | 2011-04-12 | 2015-11-17 | International Business Machines Corporation | Visual obstruction removal with image capture |
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