JP2640338B2 - Molding mold and molding method - Google Patents
Molding mold and molding methodInfo
- Publication number
- JP2640338B2 JP2640338B2 JP7015956A JP1595695A JP2640338B2 JP 2640338 B2 JP2640338 B2 JP 2640338B2 JP 7015956 A JP7015956 A JP 7015956A JP 1595695 A JP1595695 A JP 1595695A JP 2640338 B2 JP2640338 B2 JP 2640338B2
- Authority
- JP
- Japan
- Prior art keywords
- molding
- molding die
- elastic body
- molded product
- present
- 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 - Fee Related
Links
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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/32—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core on a rotating mould, former or core
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Reinforced Plastic Materials (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、管状成型物の成型に用
いる成型金型で、特に成型物の両端部の径が等しく、ま
た、外径を部分的に任意に設定することができる成型金
型およびこれを用いた成型方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die used for molding a tubular molded product, and more particularly to a molding die in which both ends of the molded product have the same diameter and the outer diameter can be partially set arbitrarily. The present invention relates to a mold and a molding method using the same.
【０００２】[0002]
【従来の技術】電気絶縁性、電磁波遮蔽性および断熱性
等の特性をもったグラスファイバーやカーボンファイバ
ー等を材料にした合成樹脂製の管状成型物の成型は、通
常、積層成型法によって行われている。この積層成型法
は、材料を溶融させて布、不織布、紙等の基材に含浸し
たプリプレグシートと呼ばれるもの、または、一般に用
いられるプラスチックシートを成型金型に巻き付けて加
熱、加圧することによって成型し、冷却後、成型金型か
ら型抜きして成型物が得られる。2. Description of the Related Art Generally, a synthetic resin tubular molded article made of glass fiber, carbon fiber, or the like having characteristics such as electrical insulation, electromagnetic wave shielding, and heat insulation is formed by a laminate molding method. ing. This lamination molding method is a method in which a material called a prepreg sheet in which a material is melted and impregnated into a base material such as cloth, nonwoven fabric, paper, or the like, or a commonly used plastic sheet is wound around a molding die and heated and pressed to form. Then, after cooling, a molded product is obtained by removing the mold from the molding die.
【０００３】この従来型の管状成形物の成形金型の構造
を図９について説明すると、管状成形金型１の両端部１
ａ、１ｂは成形後に管状成形金型１が容易に型抜きでき
るように外径が異なった抜きテーパー状になっていて、
１ａは太く、１ｂは１ａより細くなっている。Referring to FIG. 9, the structure of a conventional mold for forming a tubular molded product will be described.
a and 1b are formed in a tapered shape having different outer diameters so that the tubular molding die 1 can be easily molded after molding.
1a is thick and 1b is thinner than 1a.
【０００４】この管状成型金型１を用いた成形方法は、
図10に示すように管状成形金型１の外周に成形材料２を
巻き付けて、図11に示すように加熱、加圧状態で成形
し、冷却後、図12に示すように管状成形金型１の直径の
太い方１ａを外側に引張り管状成形金型１を抜き取る
と、管状成型物４が得られる。[0004] A molding method using the tubular molding die 1 is as follows.
As shown in FIG. 10, the molding material 2 is wound around the outer periphery of the tubular molding die 1 and molded in a heated and pressurized state as shown in FIG. 11. After cooling, as shown in FIG. By pulling out the tubular molding die 1 by pulling the larger diameter 1a outward, a tubular molded product 4 is obtained.
【０００５】[0005]
【発明が解決しようとする課題】しかし、この従来の管
状成型金型では、金型をテーパー状にした抜きの操作が
あるために成型物の両端の内径が等しい管状成型物を得
ることはできなかった。また、長尺物や大型形状物にあ
っても両端の直径が著しく違ってしまうことから成型す
ることに無理があり、更に、中間部がふくれているよう
な複雑な管状成型物にあっては成型金型の抜きができず
成形することができなかった。However, in this conventional tubular molding die, a tubular molded product having equal inner diameters at both ends of the molded product cannot be obtained because there is a punching operation in which the die is tapered. Did not. In addition, it is impossible to mold long or large-sized objects because the diameters at both ends are significantly different. Molding could not be performed and molding could not be performed.
【０００６】本発明の目的は前記の従来例の不都合を解
消し、管状成型物の成型金型を見直して、両端の内径が
等しい長尺の管状成型物や大型の管状成型物および中間
部がふくれている複雑な形状の管状成形物が容易に得ら
れる成型金型および成型方法を提供することにある。An object of the present invention is to solve the above-mentioned disadvantages of the prior art and to review a molding die for a tubular molded product. An object of the present invention is to provide a molding die and a molding method capable of easily obtaining a swollen tubular molded product having a complicated shape.
【０００７】[0007]
【課題を解決するための手段】本発明は前記目的を達成
するため、成型金型としては、成型金型が螺旋状の弾性
体からなり、非伸長状態では該螺旋状の弾性体が隙間な
く接合したこと、および、螺旋状の弾性体が非伸長状態
では、螺旋状の弾性体の幅方向端部を薄肉として重合可
能とし、かつ、重合する螺旋状の弾性体表面が平面とな
るようにしたことを要旨とするものである。According to the present invention, in order to achieve the above object, as a molding die, the molding die is formed of a helical elastic body, and in a non-extended state, the helical elastic body has no gap. In the joined state, and when the spiral elastic body is in the non-extended state, the widthwise end of the spiral elastic body is made thin and polymerizable, and the surface of the spiral elastic body to be polymerized is flat. The gist is that it has been done.
【０００８】また、成型方法としては、成型金型が螺旋
状の弾性体からなり、非伸長状態では該螺旋状の弾性体
が隙間なく接合しており、該成型金型に成型材料を巻き
付けて成型し、冷却後、該成型金型の両端の把手を持っ
て両外側に引き、成型前の螺旋状の弾性体の外径より小
さくすることによって成型物から型抜きすることを要旨
とするものである。As a molding method, a molding die is made of a spiral elastic body, and in a non-extended state, the spiral elastic body is joined without a gap. After the molding and cooling, the grips at both ends of the molding die are pulled to both outsides, and the outline is to remove the mold from the molded product by making it smaller than the outer diameter of the spiral elastic body before molding. It is.
【０００９】[0009]
【作用】請求項１および請求項３記載の本発明によれ
ば、通常、積層成型法によって所望の外径の螺旋状の弾
性体成形金型に成型材料のプリプレグシートを巻き付
け、温度１５０〜３００℃、圧力１００〜２５０kg／cm
2 、処理時間１〜２分間の成型条件で成型し、冷却後、
該成形金型の両端に設けた把手持って強く外側に引張
り、該成型金型を離型する。この操作によって、該成形
金型の外径は、長さ方向に均一に成型時の外径よりも小
さくなるので、成形物から該成形金型を容易に抜き出す
ことができ、両端の外径が等しい管状成型物が得られ
る。According to the first and third aspects of the present invention, usually, a prepreg sheet of a molding material is wound around a spiral elastic molding die having a desired outer diameter by a laminating molding method, and the temperature is 150 to 300. ° C, pressure 100-250kg / cm
2 , Molding under molding conditions of processing time 1-2 minutes, after cooling,
The grips provided at both ends of the molding die are strongly pulled outward to release the molding die. By this operation, the outer diameter of the molding die becomes uniformly smaller in the length direction than the outer diameter at the time of molding, so that the molding die can be easily extracted from the molded product, and the outer diameters of both ends are reduced. An equivalent tubular molding is obtained.
【００１０】また、この螺旋状の弾性体成形金型は、外
力から開放されることによって元の外径に戻るので、廃
棄することなく繰り返し再使用することができる。[0010] Further, since the spiral elastic body forming die returns to the original outer diameter by being released from external force, it can be reused repeatedly without discarding.
【００１１】請求項２記載の本発明によれば、成形金型
は螺旋状の弾性体表面が平面となるようにしたので、内
面が平滑な管状成型物を得るのに好都合である。According to the second aspect of the present invention, since the surface of the helical elastic body of the molding die is flat, it is convenient for obtaining a tubular molded product having a smooth inner surface.
【００１２】[0012]
【実施例】以下、図面について本発明の実施例を詳細に
説明する。図１は本発明の成型金型の第１実施例を示す
斜視図、図２〜図４はこれを用いた成型方法の各工程を
示す斜視図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of a molding die according to the present invention, and FIGS. 2 to 4 are perspective views showing steps of a molding method using the same.
【００１３】成型金型１は、非伸長状態では螺旋状の連
続輪体が隙間なく接合するような螺旋状の弾性構造体か
らなるものであり、その材質には鋼、鋳鉄、真鍮、銅、
アルミニウム等を用いるが一般的には鋼を用いる。な
お、形状記憶合金でもよい。The molding die 1 is made of a helical elastic structure such that helical continuous rings are joined without gaps in a non-extended state, and the material is steel, cast iron, brass, copper, or the like.
Aluminum or the like is used, but steel is generally used. Note that a shape memory alloy may be used.
【００１４】該成型金型１の外径は、成形物の内径に合
わせて任意に設定されるが、外径は長さ方向の端部１
ａ，１ｂおよび中間のどの部分をとっても等しく同じで
ある。また、該成型金型１の端部１ａ，１ｂには、成型
後に成形物と成形金型を分離するために両外側に強く引
っ張る把手３を設ける。The outer diameter of the molding die 1 is arbitrarily set according to the inner diameter of the molded product.
The same applies to a, 1b, and any intermediate portion. The ends 1a and 1b of the molding die 1 are provided with handles 3 which are strongly pulled outward on both sides to separate the molded product from the molding die after molding.
【００１５】本発明の成型方法としては、まず、図２に
示すように該成型金型１の外周に成型材料２を巻き付け
て、図３に示すように前述の成型条件によって成型し、
冷却後、図４に示すように該成型金型１の両端の把手３
を持って両外側に強く引張り、成型物４と該成型金型１
を分離し、左側または右側から該成型金型１を引き抜く
ことで、両端の直径が等しい管状成型物４を得る。As a molding method of the present invention, first, as shown in FIG. 2, a molding material 2 is wound around the outer periphery of the molding die 1 and molded as shown in FIG.
After cooling, the grips 3 at both ends of the molding die 1 as shown in FIG.
, And strongly pull the molded product 4 and the molding die 1
Is separated, and the molding die 1 is pulled out from the left side or the right side to obtain a tubular molded product 4 having the same diameter at both ends.
【００１６】図５、図６は本発明の第２実施例を示すも
ので、成型金型１は螺旋状の弾性体が非伸長状態では、
螺旋状の弾性体の幅方向端部を薄肉段部１ｃとして、こ
れら薄肉段部１ｃが重合可能とし、かつ、重合する状態
では螺旋状の弾性体表面が平面となるようにした。FIGS. 5 and 6 show a second embodiment of the present invention. In the molding die 1, the spiral elastic body is in a non-extended state.
The widthwise ends of the helical elastic body are thin steps 1c so that the thin steps 1c can be superimposed, and the surface of the helical elastic body is flat when superposed.
【００１７】該成型金型１を用いた成型および成型金型
の型抜きは、前述の図２〜図４と同様に行なうが、本実
施例によれば螺旋状の弾性体表面が平面であるので、内
面が平滑な管状成型物を得るのに好都合である。The molding using the molding die 1 and the demolding of the molding die are performed in the same manner as in FIGS. 2 to 4, but according to the present embodiment, the surface of the spiral elastic body is flat. Therefore, it is convenient to obtain a tubular molded product having a smooth inner surface.
【００１８】図７は本発明の第３実施例を示すもので、
正多角形の螺旋状の弾性体の成型金型１であるとした。
この正多角形は三角形、四角形、その他の多角形のう
ち、適宜なものが選択できる。この場合も前記第２実施
例のように重合する状態では螺旋状の弾性体表面が平面
となるようにしてもよい。FIG. 7 shows a third embodiment of the present invention.
The molding die 1 was a regular polygonal spiral elastic body.
As the regular polygon, an appropriate one can be selected from a triangle, a quadrangle and other polygons. Also in this case, the spiral elastic body surface may be flat in the superposed state as in the second embodiment.
【００１９】この第３実施例による成型金型１を用いた
成型および成型金型の型抜きは、前述の図２〜図４と同
様に行なうが、断面が正多角形の筒状の成型物を得るこ
とができる。The molding using the molding die 1 according to the third embodiment and the demolding of the molding die are performed in the same manner as in FIGS. 2 to 4 described above, but a cylindrical molded product having a regular polygonal cross section. Can be obtained.
【００２０】図８は本発明の第４実施例を示すもので、
螺旋状の弾性体成形金型１は外径を例えば図示のごとく
中央部分が太径になるような部分的に変えたものとし
た。該成型金型１を用いた成型は前述の図２〜図４と同
様にして行なうが、型抜きは該成形金型１の両端の把手
３を持って、成型前の螺旋状の弾性体の最小外径より小
さくなるまで両外側に強く引張ることによってなされ、
その結果、部分的に外径の異なった管状成型物を得るこ
とができる。FIG. 8 shows a fourth embodiment of the present invention.
The helical elastic body molding die 1 has an outer diameter partially changed so that, for example, the central portion has a large diameter as shown in the figure. The molding using the molding die 1 is performed in the same manner as in FIGS. 2 to 4 described above, but the molding is performed by holding the grips 3 at both ends of the molding die 1 and removing the spiral elastic body before molding. Made by pulling hard on both sides until it is smaller than the minimum outer diameter,
As a result, it is possible to obtain tubular molded products having partially different outer diameters.
【００２１】なお、 溶融した金属、付着力の強い化学
物質、焼成した時に強い接着力の有る物質の時は、成型
金型１に、離型材を塗布すればよい。In the case of a molten metal, a chemical substance having a strong adhesive force, or a substance having a strong adhesive force when fired, a mold release material may be applied to the molding die 1.
【００２２】[0022]
【発明の効果】以上述べたように本発明の成型金型およ
び成型方法は、成形金型が螺旋状の弾性体であるので、
成型後の金型の型抜きが容易にできると共に、抜きテー
パーを設けることなく、管状成型物の外径が全長で等し
いものが簡単に得られるものである。As described above, according to the molding die and the molding method of the present invention, the molding die is a spiral elastic body.
It is possible to easily remove the mold after molding, and to easily obtain a tubular molded product having the same outer diameter over its entire length without providing a removal taper.
【００２３】さらに、長尺物や大型の管状成型物、部分
的に外径の異なった複雑な管状成型物も容易に成型でき
るものである。Furthermore, a long product, a large-sized tubular molded product, and a complicated tubular molded product having partially different outer diameters can be easily molded.
【図１】本発明の成型金型の第１実施例を示す斜視図で
ある。FIG. 1 is a perspective view showing a first embodiment of a molding die according to the present invention.
【図２】本発明の成型方法の第１工程を示す斜視図であ
る。FIG. 2 is a perspective view showing a first step of the molding method of the present invention.
【図３】本発明の成型方法の第２工程を示す斜視図であ
る。FIG. 3 is a perspective view showing a second step of the molding method of the present invention.
【図４】本発明の成型方法の第３工程を示す斜視図であ
る。FIG. 4 is a perspective view showing a third step of the molding method of the present invention.
【図５】本発明の成型金型の第２実施例を示す斜視図で
ある。FIG. 5 is a perspective view showing a second embodiment of the molding die of the present invention.
【図６】本発明の成型金型の第２実施例を示す要部の縦
断側面図である。FIG. 6 is a longitudinal sectional side view of a main part showing a second embodiment of a molding die of the present invention.
【図７】本発明の成型金型の第３実施例を示す斜視図で
ある。FIG. 7 is a perspective view showing a third embodiment of a molding die according to the present invention.
【図８】本発明の成型金型の第４実施例を示す斜視図で
ある。FIG. 8 is a perspective view showing a fourth embodiment of a molding die according to the present invention.
【図９】従来例の成型金型を示す斜視図である。FIG. 9 is a perspective view showing a conventional molding die.
【図１０】従来例の成型金型による成型方法の第１工程
を示す斜視図である。FIG. 10 is a perspective view showing a first step of a conventional molding method using a molding die.
【図１１】従来例の成型金型による成型方法の第２工程
を示す斜視図である。FIG. 11 is a perspective view showing a second step of a conventional molding method using a molding die.
【図１２】従来例の成型金型による成型方法の第３工程
を示す斜視図である。FIG. 12 is a perspective view showing a third step of a molding method using a conventional molding die.
１…成型金型 １ａ，１ｂ…端部 １ｃ…薄肉段部 ２…成型材料 ３…把手 ４…成型物 DESCRIPTION OF SYMBOLS 1 ... Mold 1a, 1b ... End part 1c ... Thin step part 2 ... Molding material 3 ... Handle 4 ... Molded object
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｌ 23:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification number Agency reference number FI Technical display location B29L 23:00
Claims (3)
伸長状態では該螺旋状の弾性体が隙間なく接合したこと
を特徴とする成型金型。1. A molding die, wherein the molding die is formed of a helical elastic body, and the helical elastic body is joined without a gap in a non-extended state.
状の弾性体の幅方向端部を薄肉として重合可能とし、か
つ、重合する螺旋状の弾性体表面が平面となるようにし
た請求項１記載の成形金型。2. When the helical elastic body is in a non-stretched state, the widthwise end of the helical elastic body is made thinner so as to be polymerizable, and the surface of the helical elastic body to be polymerized is made flat. The molding die according to claim 1.
伸長状態では該螺旋状の弾性体が隙間なく接合してお
り、該成型金型に成型材料を巻き付けて成型し、冷却
後、該成型金型の両端の把手を持って両外側に引き、成
型前の螺旋状の弾性体の外径より小さくすることによっ
て成型物から型抜きすることを特徴とした成型方法。3. The molding die is made of a helical elastic body, and in a non-extended state, the helical elastic body is joined without any gap. The molding material is wound around the molding die, molded, and cooled. A molding method characterized in that the molds are pulled out from both sides by holding the grips at both ends of the molding die and made smaller than the outer diameter of the spiral elastic body before molding, thereby removing the mold from the molded product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7015956A JP2640338B2 (en) | 1995-02-02 | 1995-02-02 | Molding mold and molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7015956A JP2640338B2 (en) | 1995-02-02 | 1995-02-02 | Molding mold and molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08207134A JPH08207134A (en) | 1996-08-13 |
| JP2640338B2 true JP2640338B2 (en) | 1997-08-13 |
Family
ID=11903200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7015956A Expired - Fee Related JP2640338B2 (en) | 1995-02-02 | 1995-02-02 | Molding mold and molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2640338B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1762355B1 (en) | 2005-09-09 | 2009-12-09 | Saab Ab | Use of a helical tool and a method for producing a surface member comprising at least one stiffening member |
| DE102006031336B4 (en) | 2006-07-06 | 2010-08-05 | Airbus Deutschland Gmbh | Method for producing a fiber composite component in the aerospace industry |
| DE102006031325B4 (en) | 2006-07-06 | 2010-07-01 | Airbus Deutschland Gmbh | Method for producing a fiber composite component for aerospace applications |
| DE102006031326B4 (en) * | 2006-07-06 | 2010-09-23 | Airbus Deutschland Gmbh | Mold core and method for producing a fiber composite component for the aerospace industry |
| DE102006031334A1 (en) | 2006-07-06 | 2008-01-10 | Airbus Deutschland Gmbh | Process to manufacture omega-shaped aircraft fuselage stringer using removable form core of parallel flexible tubes |
| DE102006031335B4 (en) | 2006-07-06 | 2011-01-27 | Airbus Operations Gmbh | Method for producing a fiber composite component for aerospace applications |
| US7749421B2 (en) | 2006-12-27 | 2010-07-06 | Hexcel Corporation | Helicopter blade mandrel |
| JP2009056637A (en) * | 2007-08-30 | 2009-03-19 | Arai Pump Mfg Co Ltd | Method for manufacturing roller |
| DE102008057779B4 (en) * | 2008-11-17 | 2012-09-13 | Eads Deutschland Gmbh | Process for the preparation of a hollow molded part which is formed to a substantial extent from a fibrous material |
-
1995
- 1995-02-02 JP JP7015956A patent/JP2640338B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08207134A (en) | 1996-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2640338B2 (en) | Molding mold and molding method | |
| CA1286582C (en) | Method and apparatus for forming corrugated materials using magnetic memory cores | |
| US2202042A (en) | Method of manufacturing hollow objects | |
| US5358211A (en) | Tooling and method of making | |
| JPH0767704B2 (en) | Method for manufacturing hollow composite member | |
| CA2150312A1 (en) | Casting Method with Improved Resin Core Removing Step and Apparatus for Performing the Method | |
| JP4347472B2 (en) | Apparatus and method for producing compression molded products | |
| ES8505273A1 (en) | Method for preparing tubular chills for continuous steel casting plants | |
| US5597630A (en) | Seamless, tapered tubular member | |
| US1475764A (en) | Composite article | |
| JP2001009924A (en) | Manufacture of tubular molding | |
| JPH0957760A (en) | Mold for hollow molded article with undercut formed in inner surface | |
| JPH05138759A (en) | Production of bent pipe | |
| JP3595213B2 (en) | Method of forming FRP tube | |
| JP3100179B2 (en) | Swing type fishing rod and its manufacturing method | |
| JPH09193127A (en) | Mold frame for manufacturing hollow concrete block | |
| JPH0524321U (en) | Core material for manufacturing cylindrical FRP products | |
| JPS6239224A (en) | Manufacture of pipe made of composite material | |
| JPS5835857B2 (en) | Wankiyoku pipe no Seizouhouhou | |
| JPS6351095B2 (en) | ||
| JP2620201B2 (en) | Tube manufacturing equipment | |
| JPH0634093Y2 (en) | Core material for manufacturing cylindrical FRP products | |
| JPS6157186B2 (en) | ||
| JPH0615750A (en) | Method for molding fiber reinforced resin pipe having bent part and fiber reinforced resin pipe | |
| JPS59215239A (en) | Formation of groove of fluid bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |