JPH0710409B2 - Molding method for convex parts - Google Patents
Molding method for convex partsInfo
- Publication number
- JPH0710409B2 JPH0710409B2 JP15837988A JP15837988A JPH0710409B2 JP H0710409 B2 JPH0710409 B2 JP H0710409B2 JP 15837988 A JP15837988 A JP 15837988A JP 15837988 A JP15837988 A JP 15837988A JP H0710409 B2 JPH0710409 B2 JP H0710409B2
- Authority
- JP
- Japan
- Prior art keywords
- convex portion
- plate material
- punch
- die
- forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 31
- 238000000465 moulding Methods 0.000 title description 10
- 239000000463 material Substances 0.000 claims description 64
- 238000003825 pressing Methods 0.000 claims description 4
- 238000004080 punching Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- Forging (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、塑性加工により板材に凸部を形成するための
凸部の成形方法に関する。TECHNICAL FIELD The present invention relates to a method for forming a convex portion for forming a convex portion on a plate material by plastic working.
第９図および第10図は、板材11の一部に、比較的小さい
サイズの凸部13を形成する凸部の成形方法の一例を示す
もので、この方法では、対向して配置されるパンチ15と
ダイ17との間に板材11が配置され、パンチ15の対向面
を、ダイ17の対向面に押圧することにより、ダイ17の対
向面に形成される凹部19に、板材11の一部が塑性流動さ
れ、板材11に所定形状の凸部13が形成される。FIG. 9 and FIG. 10 show an example of a method of forming a convex portion to form a comparatively small convex portion 13 on a part of the plate material 11. In this method, punches arranged opposite to each other are used. A plate material 11 is disposed between the die 15 and the die 17, and the opposing surface of the punch 15 is pressed against the opposing surface of the die 17 to form a recess 19 formed in the opposing surface of the die 17 to form a part of the plate material 11. Is plastically flowed, and a convex portion 13 having a predetermined shape is formed on the plate material 11.
第11図および第12図は、凸部の成形方法の他の例を示す
もので、この方法では、パンチ15の対向面には、ダイ17
の対向面に形成される凹部19に対応する位置に、凹部19
と同一形状のパンチ側凸部21が形成され、このパンチ側
凸部21を板材11に押圧することにより板材11に所定形状
の凸部13が形成される。FIG. 11 and FIG. 12 show another example of the method for forming the convex portion. In this method, the die 17 is provided on the facing surface of the punch 15.
At the position corresponding to the concave portion 19 formed on the facing surface of the concave portion 19
A punch-side convex portion 21 having the same shape as that of 1. is formed, and by pressing the punch-side convex portion 21 against the plate material 11, a convex portion 13 having a predetermined shape is formed on the plate material 11.
しかしながら、第９図に示した凸部の成形方法では、板
材11の凸部13の形状を、ダイ17の凹部19の形状と同一形
状にするためには、第13図に示すように、凹部19内に充
分な材料を塑性流動する必要がある。However, in the method of forming the convex portion shown in FIG. 9, in order to make the shape of the convex portion 13 of the plate material 11 the same as the shape of the concave portion 19 of the die 17, as shown in FIG. It is necessary to plastically flow sufficient material within 19.
このため、塑性加工時に、ダイ17の凹部19が密閉状態と
なり、局部的に非常に大きな成形圧力が発生し、金型寿
命が短くなり、また、局部的な成形圧力の上昇により全
体としての成形荷重が増大するという問題がある。Therefore, during the plastic working, the concave portion 19 of the die 17 is in a closed state, a very large molding pressure is locally generated, the mold life is shortened, and the local molding pressure is increased to form the entire molding. There is a problem that the load increases.
また、第14図に示すように、凹部19の深さを増大し、先
端部非拘束の状態で、成形加工する場合には、材料の板
材11方向への流れの影響により、凸部13の高さが部分的
に異なり、平面形状の先端部を得ることができないとい
う問題がある。Further, as shown in FIG. 14, when the depth of the concave portion 19 is increased and the tip end is not constrained, when the molding process is performed, due to the influence of the flow of the material in the direction of the plate material 11, the convex portion 13 is formed. There is a problem in that the heights are partially different and it is not possible to obtain a planar tip.
そこで、第15図および第16図に示すように、パンチ15に
おけるダイ17の凹部19に対応する位置に、凹部19より小
形状のパンチ側凸部23を形成し、このパンチ側凸部23を
板材11に押圧することにより板材11に所定形状の凸部13
を形成することが考えられるが、この場合にも、前述し
たと同様な問題が生ずる。Therefore, as shown in FIGS. 15 and 16, at a position corresponding to the concave portion 19 of the die 17 in the punch 15, a punch side convex portion 23 having a smaller shape than the concave portion 19 is formed, and the punch side convex portion 23 is formed. By pressing the plate material 11, the convex portion 13 having a predetermined shape is pressed on the plate material 11.
However, in this case, the same problem as described above occurs.
一方、第11図に示した凸部の成形方法では、パンチ15に
パンチ側凸部21が形成されているため、半抜き加工とな
り、先端部非拘束で均一高さを有する凸部13を得ること
ができるが、抜き加工であるため、パンチ側凸部21の形
状が、ダイ17の凹部19の形状と同一となり、形成すべき
凸部21が小さい場合には、金型の製造が非常に困難とな
り、また、金型寿命が短くなるという問題がある。On the other hand, in the method of forming the convex portion shown in FIG. 11, since the punch-side convex portion 21 is formed on the punch 15, the punching process is performed, and the convex portion 13 having a uniform height with no restriction on the tip end is obtained. However, since it is a punching process, the shape of the punch-side convex portion 21 is the same as the shape of the concave portion 19 of the die 17, and when the convex portion 21 to be formed is small, it is very difficult to manufacture the mold. There is a problem that it becomes difficult and the life of the mold is shortened.
さらに、抜き加工であるため、パンチ側凸部21の高さ
が、形成すべき凸部13の高さとほぼ同一の高さとなり、
製品強度上、最小板厚（第12図のt3寸法）に規制がある
場合には、形成できる凸部13の高さが制限されるという
問題がある。Furthermore, since it is a punching process, the height of the punch-side convex portion 21 becomes substantially the same as the height of the convex portion 13 to be formed,
In terms of product strength, if the minimum plate thickness (t 3 dimension in FIG. 12) is restricted, there is a problem that the height of the convex portion 13 that can be formed is limited.
本発明は、上記のような問題を解決したもので、凸部の
先端部を非拘束の状態で成形するにもかかわらず、所定
形状の凸部を容易に形成することのできる凸部の成形方
法を提供することを目的とする。The present invention has solved the above-mentioned problems, and can form a convex portion having a predetermined shape easily even though the tip of the convex portion is formed in an unconstrained state. The purpose is to provide a method.
本発明にかかわる凸部の成形方法は、対向して配置され
るパンチとダイとの間に板材を配置し、前記パンチの対
向面を前記ダイの対向面に押圧することにより、前記ダ
イの対向面に形成される凹部に前記板材の一部を塑性流
動し、板材に所定形状の凸部を形成する凸部の成形方法
において、前記パンチにおける前記ダイの凹部に対向す
る位置から偏心してパンチ側凸部を形成し、このパンチ
側凸部により、前記板材に板材方向および板厚方向への
塑性流動を与え、板材に所定形状の凸部を形成するもの
である。The method of forming a convex portion according to the present invention is such that a plate material is disposed between a punch and a die that are disposed opposite to each other, and the opposing surface of the punch is pressed against the opposing surface of the die, thereby opposing the die. In a method of forming a convex part in which a part of the plate material is plastically flowed into a concave part formed in a surface to form a convex part of a predetermined shape on the plate material, the punch side is eccentric from a position facing the concave part of the die in the punch. A convex portion is formed, and the punch-side convex portion imparts plastic flow to the plate material in the plate material direction and the plate thickness direction to form a convex portion having a predetermined shape on the plate material.
本発明の凸部の成形方法では、パンチにおけるダイの凹
部に対向する位置から偏心してパンチ側凸部が形成さ
れ、このパンチ側凸部により、板材に板材方向および板
厚方向への塑性流動が与えられ、板材に所定形状の凸部
が形成される。In the method of forming a convex portion of the present invention, the punch side convex portion is formed eccentrically from the position facing the concave portion of the die in the punch, and the punch side convex portion causes plastic flow in the plate material in the plate material direction and the plate thickness direction. Then, a convex portion having a predetermined shape is formed on the plate material.
以下、本発明方法の詳細を図面を用いて説明する。 Hereinafter, details of the method of the present invention will be described with reference to the drawings.
第１図および第２図は、本発明の凸部の成形方法により
製造された成形品の一例を示すもので、この成形品は、
金属製のドーナツ状の板材31の一面に、同心状に多数の
凸部33が形成されており、板材31の外周は、板材31の他
面に向けて湾曲されている。FIG. 1 and FIG. 2 show an example of a molded product manufactured by the method for molding a convex portion of the present invention.
A large number of convex portions 33 are concentrically formed on one surface of the metal donut-shaped plate material 31, and the outer periphery of the plate material 31 is curved toward the other surface of the plate material 31.
この成形品は、本発明方法により、以下述べるようにし
て製造される。This molded article is manufactured by the method of the present invention as described below.
すなわち、第３図に示すように、対向して配置されるパ
ンチ35とダイ37との間に、中心に貫通孔39を有するドー
ナツ状の板材31が配置され、パンチ35の対向面をダイ37
の対向面に押圧することにより、ダイ37の対向面に形成
される凹部41に板材31の一部が塑性流動され、板材31に
所定形状の凸部33が形成される。That is, as shown in FIG. 3, a doughnut-shaped plate material 31 having a through hole 39 in the center is disposed between the punch 35 and the die 37 which are disposed so as to face each other, and the opposing surface of the punch 35 is positioned at the die 37.
By pressing against the facing surface of the die 37, a part of the plate material 31 is plastically flowed in the recessed portion 41 formed in the facing surface of the die 37, and the protruding portion 33 having a predetermined shape is formed on the plate material 31.
しかして、この凸部の成形方法では、パンチ35には、パ
ンチ35におけるダイ37の凹部41に対向する位置から所定
距離Ｌ偏心してパンチ側凸部43が形成され、このパンチ
側凸部43により、板材31に板材31方向および板厚方向へ
の塑性流動が与えられ、板材31に所定形状の凸部33が形
成される。Thus, in this method of forming a convex portion, the punch 35 has a punch-side convex portion 43 which is eccentric by a predetermined distance L from a position facing the concave portion 41 of the die 37 in the punch 35. The plate member 31 is subjected to plastic flow in the plate member 31 direction and the plate thickness direction, so that the plate member 31 is formed with a convex portion 33 having a predetermined shape.
すなわち、本発明方法では、第４図に示すように、パン
チ35に形成されるパンチ側凸部43の中心軸Ａを、ダイ37
に形成される凹部33の中心軸Ｂより外側に距離Ｌ偏心し
て位置させることにより、板材31の内径側への均一な材
料の塑性流動により板材31に凸部33が形成される。That is, in the method of the present invention, as shown in FIG. 4, the central axis A of the punch side convex portion 43 formed on the punch 35 is set to the die 37.
The protrusion 33 is formed on the plate material 31 by a uniform plastic flow of the material toward the inner diameter side of the plate material 31 by locating the concave portion 33 formed on the outside of the central axis B by a distance L.
すなわち、このような位置にパンチ側凸部43を形成する
場合には、材料の塑性流動は、第４図に矢符で示すよう
に、板材31の厚み方向だけでなく、板材31方向にも生じ
る。そして、この板材31方向への材料の塑性流動の分水
嶺は、パンチ側凸部43の形状の中心軸Ａと考えられる。That is, when the punch side convex portion 43 is formed at such a position, the plastic flow of the material does not only occur in the thickness direction of the plate material 31 but also in the plate material 31 direction as shown by the arrow in FIG. Occurs. Then, the watershed of the plastic flow of the material toward the plate material 31 is considered to be the central axis A of the shape of the punch side convex portion 43.
換言すると、この分水嶺を中心にして、左右方向への板
材の塑性流動のバランスが異なると、凸部33の左右で高
さが異なることとなる。In other words, if the balance of the plastic flow of the plate material in the left-right direction with respect to this watershed is different, the heights of the left and right of the convex portion 33 will be different.
そこで、第４図に示すようにパンチ側凸部43の形状の中
心位置Ａを、成形すべき製品の凸部33の位置に対して偏
心して位置させることにより、材料の流れのバランスを
変化させて、第５図に示すように、均一高さの凸部33
を、先端部非拘束状態で、板材31に形成することが可能
となる。Therefore, as shown in FIG. 4, the center position A of the shape of the punch side convex portion 43 is eccentrically positioned with respect to the position of the convex portion 33 of the product to be molded, thereby changing the balance of the material flow. Then, as shown in FIG.
Can be formed on the plate member 31 in a state in which the tip portion is not restrained.
なお、この実施例においては、板材31の中心に貫通孔39
が形成されており、貫通孔39側への材料の流れが必然的
に大きくなるため、パンチ35に形成されるパンチ側凸部
43の中心軸Ａが、ダイ37に形成される凹部41の中心軸Ｂ
より距離Ｌだけ外側に偏心して位置されている。この距
離Ｋは以下のようにして決められることになる。第３
図、第４図において、h0とh1とを等しくする場合は、凹
部41上部の材料が凹部41の中心近傍で左右（製品の半径
方向）に均等に流動させれば良い。換言すれば、パンチ
側凸部43で排除されることによってへこみが成形される
が、その際、材料は流動抵抗の大きさによって左右に別
れて流動する。左右どちらに流動するかは当然に流動抵
抗のバランスによって左右される。流動抵抗は、主にパ
ンチ35と板材31とが、パンチ側凸部43を除く部分（パン
チ側凸部43の回りの部分）で接触する接触面の摩擦によ
って発生する。そこで材料は、流動すべき側に存在する
前記接触面積の大きさに反比例して左右わかれて流動す
る。従って、前記へこみのダイ37上面に投影された図形
内には、材料が左右（製品の半径方向）に均等に流動す
る位置が存在する。その位置に凹部41が来るようにパン
チ側凸部を設ければ良い。In this embodiment, the through hole 39 is formed at the center of the plate member 31.
Since the flow of the material to the side of the through hole 39 inevitably becomes large, the punch side convex portion formed on the punch 35 is formed.
The central axis A of 43 is the central axis B of the recess 41 formed in the die 37.
It is eccentrically located outwardly by a distance L. This distance K will be determined as follows. Third
In FIG. 4 and FIG. 4, when h 0 and h 1 are made equal, the material on the upper part of the recess 41 should be evenly flowed left and right (in the radial direction of the product) near the center of the recess 41. In other words, the dent is formed by being removed by the punch side convex portion 43, but at that time, the material is divided into right and left and flows according to the magnitude of the flow resistance. Naturally, whether the fluid flows to the left or right depends on the balance of the flow resistance. The flow resistance is generated mainly by the friction of the contact surface where the punch 35 and the plate material 31 come into contact with each other except the punch side convex portion 43 (the portion around the punch side convex portion 43). Therefore, the material flows laterally in inverse proportion to the size of the contact area existing on the flow side. Therefore, in the figure projected on the upper surface of the dent die 37, there are positions where the material flows evenly to the left and right (in the radial direction of the product). The punch side convex portion may be provided so that the concave portion 41 is located at that position.
すなわち、パンチ側凸部43と形成すべき凸部33との相対
位置関係は、成形すべき製品形状により異なることとな
り、また、パンチ側凸部43の大きさ，形状により形成さ
れる凸部33の大きさ，形状が異なることとなる。That is, the relative positional relationship between the punch side convex portion 43 and the convex portion 33 to be formed differs depending on the product shape to be molded, and the convex portion 33 formed by the size and shape of the punch side convex portion 43. The size and shape will differ.
さらに、パンチ側凸部43により、塑性流動のバランスを
積極的に破壊することにより、例えば、第６図に示すよ
うに、なだらかに高さの変化した形状の凸部45を先端部
非拘束状態で形成することが可能となる。Further, by positively breaking the balance of the plastic flow by the punch side convex portion 43, for example, as shown in FIG. 6, the convex portion 45 having a shape with a gently changing height is not restrained at the tip portion. Can be formed.
しかして、本発明方法では、パンチ35におけるダイ37の
凹部41に対向する位置から偏心してパンチ側凸部43を形
成し、このパンチ側凸部43により、板材31に板材方向お
よび板厚方向への塑性流動を与え、板材31に所定形状の
凸部33を形成するようにしたので、凸部33の先端部を非
拘束の状態で成形するにもかかわらず、所定形状の凸部
33を容易に形成することが可能となる。Thus, in the method of the present invention, the punch side convex portion 43 is formed eccentrically from the position facing the concave portion 41 of the die 37 in the punch 35, and the punch side convex portion 43 causes the plate material 31 in the plate material direction and the plate thickness direction. Since the convex portion 33 having a predetermined shape is formed on the plate material 31 by applying the plastic flow of, the convex portion having a predetermined shape is formed even though the tip end portion of the convex portion 33 is molded in an unconstrained state.
33 can be easily formed.
そして、先端部非拘束状態で成形できるため、ダイ37の
凹部41内において局部的な成形圧力が生じることがな
く、比較的低荷重で成形加工が可能となり、金型寿命を
延長することができる。Further, since the tip end is not constrained, a local forming pressure is not generated in the recess 41 of the die 37, the forming process can be performed with a relatively low load, and the die life can be extended. .
第７図は、ダイに形成される凹部と、パンチに形成され
るパンチ側凸部とを同一線上に位置して、先端部非拘束
状態で凸部47を形成した例を示すもので、この例では、
図に矢符で示すように、内側方向への塑性流動が大きい
ため、凸部47の外側の高さh0より内側の凸部の高さh
1が、例えば、0.15mm程高くなり、また、成形のための
加工荷重は、120tfであった。FIG. 7 shows an example in which the concave portion formed on the die and the convex portion on the punch side formed on the punch are located on the same line, and the convex portion 47 is formed in a state where the tip end is not restrained. In the example,
As shown by the arrow in the figure, due to the large plastic flow inward, the height h of the inner protrusions than the height h 0 of the outer convex portion 47
1 , for example, was as high as 0.15 mm, and the processing load for molding was 120 tf.
一方、第４図に示した実施例では、第７図に示した製品
と同一製品を成形した場合に、外側方向への塑性流動
が、第７図の場合に比較して大きくなるため、先端部非
拘束状態で凸部33を形成しても、外側の凸部の高さh0と
内側の凸部の高さh1との差を、例えば、0.02〜0.04mm程
度にすることができ、また、成形のための加工荷重は、
80tfであった。On the other hand, in the embodiment shown in FIG. 4, when the same product as the product shown in FIG. 7 is molded, the plastic flow in the outward direction becomes larger than that in the case of FIG. Even if the convex portion 33 is formed in the part-unconstrained state, the difference between the height h 0 of the outer convex portion and the height h 1 of the inner convex portion can be, for example, about 0.02 to 0.04 mm. Also, the processing load for molding is
It was 80tf.
なお、以上述べた実施例では、比較的面積の小さい板材
31の成形加工に本発明を適用した例について述べたが、
本発明はかかる実施例に限定されるものではなく、非常
に板材の面積が大きい板材の一部に凸部を成形する成形
加工にも同様に適用できることは勿論である。この場合
には、第８図に示すように、板材に形成される凸部49あ
るいはこの近傍に、材料の塑性流動を生じさせるための
孔51あるいはスリット53等を形成することが望ましい。In addition, in the above-mentioned embodiment, the plate material having a relatively small area is used.
Although the example of applying the present invention to the molding process of 31 has been described,
The present invention is not limited to such an embodiment, and it is needless to say that the present invention can be similarly applied to a forming process for forming a convex portion on a part of a plate material having an extremely large area. In this case, as shown in FIG. 8, it is desirable to form holes 51 or slits 53 or the like for causing plastic flow of the material at or near the convex portion 49 formed on the plate material.
以上述べたように本発明の凸部の成形方法では、パンチ
におけるダイの凹部に対向する位置から偏心してパンチ
側凸部を形成し、このパンチ側凹部により、板材に板材
方向および板厚方向への塑性流動を与え、板材に所定形
状の凸部を形成するようにしたので、凸部の先端部を非
拘束の状態で成形するにもかかわらず、所定形状の凸部
を容易に形成することができるという利点がある。As described above, in the method for forming a convex portion of the present invention, the punch side convex portion is formed eccentrically from the position facing the concave portion of the die in the punch, and the punch side concave portion allows the plate material in the plate material direction and the plate thickness direction. Since the convex part of a predetermined shape is formed on the plate material by applying the plastic flow of, it is possible to easily form the convex part of a predetermined shape even if the tip end of the convex part is molded in an unconstrained state. The advantage is that
第１図は本発明の板材の成形方法により製造された成形
品の一例を示す縦断面図である。 第２図は第１図の成形品を示す側面図である。 第３図および第４図は本発明の凸部の成形方法の一実施
例を示す説明図である。 第５図および第６図は本発明の凸部の成形方法により形
成される凸部を示す説明図である。 第７図は従来の凸部の成形方法の一例を示す説明図であ
る。 第８図は本発明の板材の成形方法の他の実施例を示す説
明図である。 第９図ないし第16図は従来の板材の成形方法を示す説明
図である。 〔主要な部分の符号の説明〕 31……板材 33……凸部 35……パンチ 37……ダイ 41……凹部 43……パンチ側凸部。FIG. 1 is a longitudinal sectional view showing an example of a molded product manufactured by the method for molding a plate material according to the present invention. FIG. 2 is a side view showing the molded product of FIG. FIG. 3 and FIG. 4 are explanatory views showing an embodiment of the method for forming the convex portion of the present invention. 5 and 6 are explanatory views showing a convex portion formed by the convex portion forming method of the present invention. FIG. 7 is an explanatory view showing an example of a conventional method of forming a convex portion. FIG. 8 is an explanatory view showing another embodiment of the plate material forming method of the present invention. 9 to 16 are explanatory views showing a conventional method for forming a plate material. [Explanation of signs of main parts] 31 …… Plate material 33 …… Convex portion 35 …… Punch 37 …… Die 41 …… Concave portion 43 …… Punch side convex portion.
Claims (1)
（37）との間に板材（31）を配置し、前記パンチ（35）
の対抗面を前記ダイ（37）の対抗面に押圧することによ
り、前記ダイの対抗面に形成される凹部（41）に前記板
材（31）の一部を塑性流動し、板材（31）に所定形状の
凸部（33）を形成する凸部の成形方法において、前記パ
ンチにおける前記ダイの凹部（41）に対抗する位置か
ら、凸部の所定の形状に見合った量だけ偏心させた位置
にパンチ側凸部（43）を形成し、このパンチ側凸部（4
3）により、前記板材（31）に板材方向及び板厚方向へ
の塑性流動を与え、板材に所定形状の凸部（33）を成形
することを特徴とする凸部の成形方法。1. A plate material (31) is arranged between a punch (35) and a die (37) which are arranged to face each other, and the punch (35) is arranged.
By pressing the opposing surface of the die against the opposing surface of the die (37), a part of the plate material (31) is plastically flowed into the recess (41) formed in the opposing surface of the die, and the plate material (31) is In the method of forming a convex portion to form a convex portion (33) of a predetermined shape, from the position opposed to the concave portion (41) of the die in the punch to the position decentered by an amount corresponding to the predetermined shape of the convex portion. The punch side protrusion (43) is formed, and this punch side protrusion (4
According to 3), a plastic flow in the plate material direction and the plate thickness direction is applied to the plate material (31) to form a convex part (33) having a predetermined shape on the plate material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15837988A JPH0710409B2 (en) | 1988-06-27 | 1988-06-27 | Molding method for convex parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15837988A JPH0710409B2 (en) | 1988-06-27 | 1988-06-27 | Molding method for convex parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH026034A JPH026034A (en) | 1990-01-10 |
| JPH0710409B2 true JPH0710409B2 (en) | 1995-02-08 |
Family
ID=15670421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15837988A Expired - Fee Related JPH0710409B2 (en) | 1988-06-27 | 1988-06-27 | Molding method for convex parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0710409B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12016555B2 (en) * | 2020-11-10 | 2024-06-25 | Cilag Gmbh International | Method of forming an anvil for a surgical stapler |
-
1988
- 1988-06-27 JP JP15837988A patent/JPH0710409B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH026034A (en) | 1990-01-10 |
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