JPH0761646B2 - Centrifugal molding of fiber reinforced concrete products - Google Patents
Centrifugal molding of fiber reinforced concrete productsInfo
- Publication number
- JPH0761646B2 JPH0761646B2 JP63158928A JP15892888A JPH0761646B2 JP H0761646 B2 JPH0761646 B2 JP H0761646B2 JP 63158928 A JP63158928 A JP 63158928A JP 15892888 A JP15892888 A JP 15892888A JP H0761646 B2 JPH0761646 B2 JP H0761646B2
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- mold
- concrete
- formwork
- fiber
- 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 - Lifetime
Links
- 238000000465 moulding Methods 0.000 title claims description 15
- 239000011210 fiber-reinforced concrete Substances 0.000 title claims description 10
- 239000000835 fiber Substances 0.000 claims description 93
- 239000004567 concrete Substances 0.000 claims description 40
- 238000009415 formwork Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 6
- 238000005056 compaction Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 34
- 239000010959 steel Substances 0.000 description 34
- 230000003014 reinforcing effect Effects 0.000 description 15
- 238000002347 injection Methods 0.000 description 13
- 239000007924 injection Substances 0.000 description 13
- 230000002787 reinforcement Effects 0.000 description 9
- 239000004570 mortar (masonry) Substances 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012783 reinforcing fiber Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Producing Shaped Articles From Materials (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、ポールやパイルのような細長い円筒柱形状の
繊維補強コンクリート製品を遠心成形する方法に関す
る。Description: TECHNICAL FIELD The present invention relates to a method for centrifugally molding a fiber-reinforced concrete product having an elongated cylindrical columnar shape such as a pole or a pile.
＜従来の技術＞ 第１従来法 この種の遠心成形法は、補強用の繊維を全長に渡って混
入する場合、繊維を混入したコンクリートを用意する一
方、細長い円筒形状の型枠内に、細長い円筒籠形状の鉄
筋を同芯状に配置し、型枠内の円筒籠形状の鉄筋の中心
部に注入管の先端開口を挿入する。<Prior Art> First Conventional Method In this type of centrifugal molding method, when reinforcing fibers are mixed over the entire length, a concrete mixed with fibers is prepared, while a long and slender cylindrical form is used to form slender The cylindrical cage-shaped reinforcing bars are arranged concentrically, and the tip opening of the injection pipe is inserted into the center of the cylindrical cage-shaped reinforcing bars in the mold.
繊維を混入したコンクリートは、ポンプで注入管に圧送
して、注入管の先端開口から型枠内に注入し、型枠内に
全長に渡って配置する。Concrete containing fibers is pumped into a casting pipe by a pump, poured into the mold through the opening of the tip of the casting pipe, and placed over the entire length in the mold.
鉄筋と繊維混入コンクリートを入れた型枠は、遠心成形
機上で回転し、型枠内の繊維混入コンクリートを締め固
め、細長い円筒柱形状に成形する。The mold containing the reinforcing steel and the fiber-mixed concrete is rotated on a centrifugal molding machine to compact the fiber-mixed concrete in the mold and mold it into an elongated cylindrical column shape.
第２従来法 パイルの遠心成形法は、補強用の繊維を端部のみに混入
する場合、特公昭58−2047号公報に開示されているよう
に、細長い円筒形状の型枠を第１回転数で回転し、回転
中の型枠内に、繊維を混入しない部分にはコンクリート
を、繊維を混入する端部にはモルタルを、それぞれ、投
入して型枠内面に円筒状に広げて張り付け、次に、繊維
を回転中の型枠内の円筒状モルタル層の中心孔に投入し
てモルタル層内に進入させる。The second conventional method In the pile centrifugal molding method, when the reinforcing fibers are mixed only in the end portions, as shown in Japanese Patent Publication No. 58-2047, a slender cylindrical formwork is used at the first rotation speed. In the rotating mold, concrete is put in the part where fibers are not mixed, mortar is put in the end where fibers are mixed, and it is spread cylindrically on the inner surface of the form and pasted. First, the fibers are introduced into the center hole of the cylindrical mortar layer in the rotating mold to enter the mortar layer.
その後、型枠を第２回転数で回転し、型枠内の円筒状コ
ンクリート層と繊維が進入した円筒状モルタル層をそれ
ぞれ締め固め、細長い円筒柱形状に成形する。After that, the mold is rotated at the second rotation speed to compact the cylindrical concrete layer and the cylindrical mortar layer into which the fibers have entered into the mold to form an elongated cylindrical columnar shape.
＜発明が解決しようとする課題＞ 第１従来法においては、繊維混入コンクリートは、繊維
の混入量が多くなると、流動性の低下量が多くなるの
で、繊維混入コンクリートの圧送に大動力のポンプと大
径の注入管を要する。<Problems to be Solved by the Invention> In the first conventional method, when the fiber-mixed concrete has a large amount of fibers mixed therein, the fluidity of the fiber decreases, so that a pump having a large power is used for pumping the fiber-mixed concrete. Requires a large diameter injection tube.
ところが、ボールやパイル用の型枠は小径であるので、
注入管を大径にすることが困難である。However, since the formwork for balls and piles has a small diameter,
It is difficult to make the injection pipe large in diameter.
従って、繊維による補強効果を高めるため、繊維の混入
量を多くすると、ポールやパイルのような細長い円筒柱
形状の繊維補強コンクリート製品の製造が困難になる。Therefore, if the amount of fibers is increased in order to enhance the reinforcing effect of the fibers, it becomes difficult to manufacture a fiber-reinforced concrete product in the shape of an elongated cylindrical column such as a pole or a pile.
第２従来法においては、繊維を回転中の型枠内の円筒状
モルタル層の中心孔、即ち、パイルの中心孔となる非常
に小さい孔に投入するので、繊維の投入は、型枠内の円
筒状モルタル層の中心孔に繊維供給コンベアを挿入して
行なうことができず、手作業で行なわれる。In the second conventional method, the fibers are introduced into the center hole of the cylindrical mortar layer in the rotating mold, that is, the very small hole which is the center hole of the pile. It cannot be done by inserting the fiber supply conveyor into the center hole of the cylindrical mortar layer, and it is done manually.
ところが、パイルの端部のみを補強する場合は、繊維の
投入が手作業で可能であるが、パイルの中央部又は全長
を補強する場合は、繊維の投入が不可能である。However, when reinforcing only the ends of the pile, it is possible to manually add the fibers, but when reinforcing the central part or the entire length of the pile, it is impossible to add the fibers.
従って、中央部又は全長を繊維で補強したパイルを製造
することができない。Therefore, it is not possible to manufacture a pile in which the central portion or the entire length is reinforced with fibers.
結局、両従来法は、全長又は所望の部分の補強効果が高
いポールやパイルのような細長い円筒柱形状の繊維補強
コンクリート製品を製造することができない。After all, both conventional methods cannot produce fiber-reinforced concrete products in the form of elongated cylindrical columns, such as poles and piles, which have a high effect of reinforcing the entire length or a desired portion.
本発明の目的は、上記のような従来の課題を解決するこ
とである。An object of the present invention is to solve the above conventional problems.
＜課題を解決するための手段＞ 本発明は、遠心成形用の細長い円筒形状の型枠内に、先
ず、繊維を入れ、その後、コンクリートを入れ、 型枠を混合用の回転数で回転して型枠内で繊維とコンク
リートを混合し、次に、型枠を締め固め用の回転数で回
転して型枠内の繊維が混入したコンクリートを締め固
め、 ポールやパイルのような細長い円筒柱形状の繊維補強コ
ンクリート製品を得ることを特徴とする遠心成形法であ
る。<Means for Solving the Problems> In the present invention, first, fibers are put in an elongated cylindrical mold for centrifugal molding, then concrete is put therein, and the mold is rotated at a rotation speed for mixing. Mixing fibers and concrete in the formwork, then rotating the formwork at the number of revolutions for compaction to compact the fiber-mixed concrete in the formwork to form a long cylindrical column such as a pole or pile. This is a centrifugal molding method characterized by obtaining the fiber reinforced concrete product of.
＜作 用＞ 本発明においては、繊維とコンクリートが型枠内に別々
に入れられて型枠の混合用の回転によって型枠内で混合
される。繊維が混入した流動性の低いコンクリートを注
入管で型枠内に圧送しない。従って、型枠内に入れる繊
維の量を多くすることができる。<Operation> In the present invention, the fiber and the concrete are separately put in the mold and mixed in the mold by rotation for mixing the mold. Do not pump concrete with low fluidity containing fibers into the formwork using an injection pipe. Therefore, it is possible to increase the amount of fibers put in the mold.
また、繊維は、コンクリートが投入されていない型枠内
に入れるので、繊維の投入は、型枠内に繊維供給コンベ
アを挿入して又は分割型の型枠を分割して行なうことが
できる。繊維は、型枠内に全長に渡って又は中央部や端
部等の所望の部分のみに入れることができる。Further, since the fibers are put in the mold in which concrete is not put, the fibers can be put in by inserting the fiber supply conveyor into the mold or by dividing the split mold. The fibers can be placed in the mold over the entire length or only in the desired parts, such as in the center or at the ends.
＜発明の効果＞ 本発明においては、繊維は、型枠内に入れる量を多くす
ることができ、しかも、型枠内に全長に渡って又は中央
部や端部等の所望の部分のみに入れることができるの
で、全長又は所望の部分の補強効果が高いポールやパイ
ルのような細長い円筒柱形状の繊維補強コンクリート製
品を製造することができる。<Effects of the Invention> In the present invention, the amount of fibers to be put in the mold can be increased, and moreover, the fibers can be put in the mold over the entire length or only in desired portions such as the central portion and the end portions. Therefore, it is possible to manufacture an elongated cylindrical columnar fiber-reinforced concrete product such as a pole or a pile having a high reinforcing effect on the entire length or a desired portion.
＜実施例＞ 本例の繊維補強コンクリート製品の遠心成形法は、送電
線、配電線、通信線、交通信号機、交通標識板等のポー
ルや、杭とも言われるパイルのような細長い円筒柱形状
の鋼繊維補強鉄筋コンクリート製品を遠心成形する例で
ある。<Example> Centrifugal molding of a fiber reinforced concrete product of this example is performed on a pole such as a power transmission line, a distribution line, a communication line, a traffic signal, a traffic signboard, and an elongated cylindrical columnar shape such as a pile called a pile. It is an example of centrifuging a steel fiber reinforced reinforced concrete product.
遠心成形用の２分割型の細長い円筒形状の型枠は、水平
に配置して、型枠内に細長い円筒籠形状の鉄筋を同芯状
に配置する。また、型枠の一端側には、補強用の鋼繊維
を移送する繊維供給コンベアを型枠の中心軸の方向に沿
って水平に配置する。型枠内の円筒籠形状の鉄筋の中心
部の一端には、繊維供給コンベアの先端を挿入する。The two-part split type elongated cylindrical mold for centrifugal molding is arranged horizontally, and the elongated cylindrical basket-shaped rebars are arranged concentrically in the mold. Further, on one end side of the mold, a fiber supply conveyor for transferring the reinforcing steel fibers is arranged horizontally along the direction of the central axis of the mold. The tip of the fiber supply conveyor is inserted into one end of the central portion of the cylindrical cage-shaped rebar in the formwork.
そして、細長いコンクリート製品の全長に渡って鋼繊維
を混入する場合は、繊維供給コンベアを連続して駆動
し、繊維供給コンベアの先端から鋼繊維を連続して落下
させる。一方、鉄筋を配置した型枠は、中心軸の方向に
沿って繊維供給コンベア側に連続して移動させ、駆動中
の繊維供給コンベアの先端を型枠内の一端から他端に相
対的に移動する。When the steel fibers are mixed over the entire length of the elongated concrete product, the fiber supply conveyor is continuously driven, and the steel fibers are continuously dropped from the tip of the fiber supply conveyor. On the other hand, the formwork in which the reinforcing bars are arranged is continuously moved to the fiber supply conveyor side along the direction of the central axis, and the tip of the driving fiber supply conveyer is relatively moved from one end to the other end in the formwork. To do.
すると、細長い型枠内に全長に渡って所望量の鋼繊維が
連続して散布されて配置される。Then, a desired amount of steel fibers are continuously sprinkled and arranged in the elongated mold over the entire length.
また、鋼繊維による補強を必要とする部分にのみ鋼繊維
を混入する場合は、型枠内を相対的に移動する繊維供給
コンベアの先端が型枠内の鋼繊維による補強を必要とす
る部分を通過する間にのみ、繊維供給コンベアを駆動し
て繊維供給コンベアの先端から鋼繊維を落下させ、繊維
供給コンベアの先端が型枠内の鋼繊維による補強を必要
としない部分を通過する間には、繊維供給コンベアの駆
動を停止して繊維供給コンベアの先端から鋼繊維を落下
させない。In addition, when mixing steel fibers only in the parts that require reinforcement with steel fibers, the tip of the fiber supply conveyor that moves relatively in the formwork should remove the parts that require reinforcement with steel fibers in the formwork. Only while passing, drive the fiber feed conveyor to drop the steel fibers from the tip of the fiber feed conveyor, while the tip of the fiber feed conveyor passes through the portion of the formwork that does not require reinforcement with steel fibers. , The driving of the fiber supply conveyor is stopped so that the steel fibers do not drop from the tip of the fiber supply conveyor.
すると、型枠内の鋼繊維による補強を必要とする部分に
のみ所望量の鋼繊維が散布されて配置され、型枠内の鋼
繊維による補強を必要としない部分には鋼繊維が散布さ
れない。Then, a desired amount of the steel fibers is dispersed and arranged only in the portion of the formwork that requires the reinforcement of the steel fibers, and the portion of the formwork that does not require the reinforcement of the steel fibers is not dispersed.
型枠内に鋼繊維を入れた後、型枠内の円筒籠形状の鉄筋
の中心部の一端には、繊維供給コンベアの先端に代え
て、コンクリート注入管の先端の開口を挿入する。After the steel fiber is put into the mold, an opening at the tip of the concrete injection pipe is inserted into one end of the center of the cylindrical cage-shaped reinforcing bar in the mold, instead of the tip of the fiber supply conveyor.
そして、セメント、水、骨材等のコンクリート材料を混
練りして、鋼繊維が混入していないコンクリートを用意
し、このコンクリートをポンプでコンクリート注入管に
圧送して、コンクリート注入管の先端の開口から流出さ
せる。一方、鉄筋と鋼繊維を入れた型枠は、中心軸の方
向に沿ってコンクリート注入管側に連続して移動させ、
コンクリート注入管の先端の開口を型枠内の一端から他
端に相対的に移動する。Then, concrete materials such as cement, water, and aggregate are kneaded to prepare concrete without steel fibers mixed, and this concrete is pumped to the concrete injection pipe by a pump to open the tip of the concrete injection pipe. Drain from. On the other hand, the formwork containing the reinforcing bars and steel fibers is continuously moved to the concrete injection pipe side along the direction of the central axis,
The opening at the tip of the concrete injection pipe is moved relatively from one end to the other end in the mold.
すると、型枠内に全長に渡って所望量のコンクリートが
連続して注入されて配置される。Then, a desired amount of concrete is continuously poured and arranged in the mold over the entire length.
その後、鉄筋と鋼繊維及びコンクリートを入れた型枠
は、遠心成形機に仕掛けて、中心軸の回りに回転する。Then, the mold containing the reinforcing bars, steel fibers and concrete is set in a centrifugal molding machine and rotated around the central axis.
型枠の回転数は、最初の段階では、型枠内の鋼繊維とコ
ンクリートを混合するのに適した混合用の回転数に設定
し、型枠内の鋼繊維とコンクリートを型枠の回転を利用
して混合する。The rotation speed of the formwork should be set to a rotation speed for mixing that is suitable for mixing the steel fibers and concrete in the formwork at the first stage, and the steel fiber and concrete in the formwork should be rotated in the formwork. Use and mix.
次の段階では、型枠の回転数を、型枠内の鋼繊維が混入
したコンクリートを締め固めるのに適した締め固め用の
回転数に設定し、型枠内の鋼繊維が混入したコンクリー
トを型枠の回転による遠心力を利用して締め固めて円筒
籠形状の鉄筋が埋没した細長い円筒形状に成形する。In the next stage, the number of rotations of the formwork is set to the number of rotations for compaction suitable for compacting the concrete containing steel fibers in the formwork, and the concrete containing steel fibers in the formwork is set. It is compacted using the centrifugal force generated by the rotation of the mold to form a slender cylindrical shape in which cylindrical cage-shaped reinforcing bars are buried.
その後、型枠内の鋼繊維が混入して鉄筋が埋没した円筒
形状のコンクリートは、蒸気中で養生し、脱型し、大気
中で養生して、細長い円筒形状の鋼繊維補強鉄筋コンク
リート製品を得る。After that, the cylindrical concrete in which the steel fibers in the formwork are mixed and the reinforcing bars are buried, is cured in steam, demolded, and cured in the air to obtain an elongated cylindrical steel fiber reinforced reinforced concrete product. .
この細長いコンクリート製品は、型枠内に全長に渡って
鋼繊維を連続して配置した場合は、全長に渡って鋼繊維
が混入されていて、全長が鋼繊維によって補強されてい
る。In the elongated concrete product, when the steel fibers are continuously arranged in the mold over the entire length, the steel fibers are mixed over the entire length and the entire length is reinforced by the steel fibers.
また、型枠内に鋼繊維による補強を必要とする部分にの
み鋼繊維を配置した場合は、鋼繊維による補強を必要と
する部分にのみ鋼繊維が混入されていて、鋼繊維による
補強を必要とする部分のみが補強されている。Also, if the steel fibers are placed only in the parts that require reinforcement with steel fibers in the formwork, the steel fibers are mixed only in the parts that require reinforcement with steel fibers, and reinforcement with steel fibers is required. Only the parts to be reinforced are reinforced.
鋼繊維は、鋼繊維による補強を必要としない部分には混
入されておらず、無駄になっていない。The steel fiber is not wasted because it is not mixed in a portion that does not require reinforcement by the steel fiber.
なお、ポールは地上に設立した際の根本部を、パイルは
地中に打ち込む際の頭部を補強する必要がある。In addition, it is necessary to reinforce the root part when the pole is established on the ground, and the head part when driving the pile into the ground.
本例においては、繊維とコンクリートが型枠内に別々に
入れられて混合され、繊維混入コンクリートを注入管で
圧送しないので、繊維の量を多くすることができる。し
かも、繊維は、コンクリートが投入されていない型枠内
に入れるので、繊維の投入は、型枠内に繊維供給コンベ
アを挿入して行なうことができ、繊維は、型枠内に全長
に渡って又は所望の部分のみに能率よく入れることがで
きる。従って、全長又は所望の部分の補強効果が高いポ
ールやパイルのような細長い円筒柱形状の繊維補強コン
クリート製品を製造することができる。また、繊維が混
入していないコンクリートをポンプンと注入管で圧送す
るので、ポンプや注入管等のコンクリート注入装置は、
繊維が混入していないコンクリート製品を遠心成形する
場合に使用される通常のものがそのまま使用される。In this example, the fibers and the concrete are separately put in the mold and mixed, and the fiber-containing concrete is not pumped by the injection pipe, so that the amount of the fibers can be increased. Moreover, since the fibers are put in the formwork in which concrete is not put, the fibers can be put in by inserting the fiber supply conveyor into the formwork, and the fibers are spread over the entire length in the formwork. Alternatively, it can be efficiently put in only a desired portion. Therefore, it is possible to manufacture an elongated cylindrical columnar fiber-reinforced concrete product such as a pole or a pile having a high reinforcing effect on the entire length or a desired portion. In addition, concrete that does not contain fibers is pumped with a pump and an injection pipe, so concrete injection equipment such as pumps and injection pipes
The usual ones used when centrifugally molding concrete products without fibers are used as they are.
＜変形例＞ 実施例においては、型枠内に繊維を入れるのに、型枠内
の円筒籠形状鉄筋内に繊維供給コンベアを挿入したが、
次のようにする。<Modification> In the example, in order to put the fibers in the mold, the fiber supply conveyor was inserted into the cylindrical cage-shaped rebar in the mold.
Do the following:
水平に配置した遠心成形用の２分割型の型枠の半円筒形
状の下型内に、円筒籠形状の鉄筋を同芯状に配置した
後、繊維を下型の上方位置から下型内に落下させて散布
し、繊維の散布後に、型枠の半円筒形状の上型を、鉄筋
と繊維を入れた下型に被せて固定する。After arranging the cylindrical cage-shaped rebars concentrically in the semi-cylindrical lower mold of the horizontally divided two-division mold for centrifugal molding, the fibers are moved from the upper position of the lower mold to the lower mold. After dropping and spraying the fibers, the semi-cylindrical upper mold of the mold is put on the lower mold containing the reinforcing bars and the fibers and fixed.
また、実施例においては、補強用の繊維に、鋼繊維を使
用したが、ガラス繊維、炭素繊維等を使用する。Further, although steel fibers are used as the reinforcing fibers in the examples, glass fibers, carbon fibers or the like are used.
Claims (2)
先ず、繊維を入れ、その後、コンクリートを入れ、 型枠を混合用の回転数で回転して型枠内で繊維とコンク
リートを混合し、次に、型枠を締め固め用の回転数で回
転して型枠内の繊維が混入したコンクリートを締め固
め、 ポールやパイルのような細長い円筒柱形状の繊維補強コ
ンクリート製品を得ることを特徴とする遠心成形法。1. An elongated cylindrical mold for centrifugal molding,
First, the fibers are put, then the concrete is put, the formwork is rotated at the rotation speed for mixing to mix the fibers and the concrete in the formwork, and then the formwork is rotated at the rotation speed for compaction. The centrifugal molding method is characterized by compacting the concrete mixed with the fibers in the mold to obtain fiber-reinforced concrete products in the shape of elongated cylindrical columns such as poles and piles.
所望の部分にのみ配置して、繊維を所望の部分にのみ混
入した部分補強コンクリート製品を得ることを特徴とす
る請求項１記載の遠心成形法。2. A fiber reinforced concrete product in which fibers are mixed only in a desired portion without arranging the fibers in the mold over the entire length but only in a desired portion. Item 1. The centrifugal molding method according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63158928A JPH0761646B2 (en) | 1988-06-27 | 1988-06-27 | Centrifugal molding of fiber reinforced concrete products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63158928A JPH0761646B2 (en) | 1988-06-27 | 1988-06-27 | Centrifugal molding of fiber reinforced concrete products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH028009A JPH028009A (en) | 1990-01-11 |
| JPH0761646B2 true JPH0761646B2 (en) | 1995-07-05 |
Family
ID=15682403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63158928A Expired - Lifetime JPH0761646B2 (en) | 1988-06-27 | 1988-06-27 | Centrifugal molding of fiber reinforced concrete products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0761646B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11261276A (en) * | 1998-03-10 | 1999-09-24 | Tdk Corp | Noise countermeasure component for flat cable |
| JP4176764B2 (en) | 2005-11-29 | 2008-11-05 | Ｔｄｋ株式会社 | Noise absorber |
| CN115648388B (en) * | 2022-12-29 | 2023-03-31 | 北京联合荣大工程材料股份有限公司 | Pumping pouring method of high-steel fiber castable |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS582047A (en) * | 1981-06-26 | 1983-01-07 | Fujitsu Ltd | Manufacture of semiconductor device |
| JPS6019833B2 (en) * | 1981-07-20 | 1985-05-18 | 横河電機株式会社 | digitizer |
| JPS5949166A (en) * | 1982-09-14 | 1984-03-21 | 日本フエライト株式会社 | Method of connecting wire in noise filter |
| JPS61195806A (en) * | 1985-02-27 | 1986-08-30 | 日本ヒユ−ム管株式会社 | Manufacture of centrifugal-force concrete product |
-
1988
- 1988-06-27 JP JP63158928A patent/JPH0761646B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH028009A (en) | 1990-01-11 |
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