JPH074633B2 - Manufacturing method of bottomed cylinder with shoulder - Google Patents
Manufacturing method of bottomed cylinder with shoulderInfo
- Publication number
- JPH074633B2 JPH074633B2 JP24840589A JP24840589A JPH074633B2 JP H074633 B2 JPH074633 B2 JP H074633B2 JP 24840589 A JP24840589 A JP 24840589A JP 24840589 A JP24840589 A JP 24840589A JP H074633 B2 JPH074633 B2 JP H074633B2
- Authority
- JP
- Japan
- Prior art keywords
- blank
- axis
- cylinder
- peripheral wall
- plunger
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/2411—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the valve stem and rocker arm
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はエンジンの動弁系のバルブクリアランスによる
音の発生を防止するバルブラッシュアジャスタのプラン
ジャ等の有底筒体の製法に関するものである。Description: TECHNICAL FIELD The present invention relates to a method of manufacturing a bottomed cylindrical body such as a plunger of a valve lash adjuster for preventing generation of noise due to a valve clearance of a valve train of an engine.
（従来の技術） 従来の油圧式バルブラッシュアジャスタ（以下バルブラ
ッシュアジャスタと呼ぶ）は第10図の如く、ロッカアー
ム（２）中に開設されたガイド穴（20）に、一端が閉塞
し、他端が開口したシリンダ（３）を閉塞側を外側にし
て摺動可能に嵌め込み、該シリンダ内には、底部に弁孔
（41）を開設し内部が油溜室（45）となった円筒状プラ
ンジャ（４）を摺動可能に配備し、プランジャ（４）の
開口端には端縁に当接してヘッドキャップ（５）を被せ
ている。(Prior Art) A conventional hydraulic valve lash adjuster (hereinafter referred to as a valve lash adjuster) has one end closed at a guide hole (20) formed in a rocker arm (2) and the other end as shown in FIG. A cylinder (3) with an open side is slidably fitted with the closed side outside, and a valve hole (41) is opened in the bottom of the cylinder to form an oil reservoir (45) inside the cylindrical plunger. (4) is slidably arranged, and the open end of the plunger (4) is covered with a head cap (5) in contact with the edge.
シリンダ（３）の閉塞端（31）がエンジンバルブ（７）
のステム（72）に当接し、該ステム（72）はスプリング
（71）によってシリンダ（３）側に付勢されている。The closed end (31) of the cylinder (3) is the engine valve (7).
Abutting against the stem (72), the stem (72) is urged toward the cylinder (3) by the spring (71).
シリンダ（３）の底部とプランジャ（４）の底部との間
に高圧室（32）が形成され、該高圧室（32）にはプラン
ジャ内部の油溜室（45）から高圧室（32）への一方向の
油の流れを許容するチェック弁（６）が設けられてい
る。A high-pressure chamber (32) is formed between the bottom of the cylinder (3) and the bottom of the plunger (4), and the high-pressure chamber (32) moves from the oil reservoir chamber (45) inside the plunger to the high-pressure chamber (32). A check valve (6) is provided to allow the oil flow in one direction.
又、前記ヘッドキャップ（５）内に、プランジャ（４）
の開口端に被さる内蓋（47）を取付け、プランジャ
（４）にヘッドキャップ（５）を被せると同時に内蓋
（47）によって傾き状態のプランジャ（４）内の油溜室
（45）の油の漏れ防止を画っている。In addition, the plunger (4) is placed in the head cap (5).
Attach the inner lid (47) that covers the open end of the, and cover the plunger (4) with the head cap (5), and at the same time, use the inner lid (47) to tilt the oil in the oil reservoir (45) in the plunger (4). It is designed to prevent leakage.
（本発明が解決しようとする課題） 上記バルブラッシュアジャスタの場合、ヘッドキャップ
（５）と内蓋（47）の夫々の開口端縁は、プランジャ
（４）の解放側端面に当接しているだけであるから、ヘ
ッドキャップ（５）及び内蓋（47）とプランジャ（４）
との当接部の僅かな隙間から油が漏れ、ヘッドキャップ
（５）と内蓋（47）との間及びヘッドキャップ（５）と
シリンダ（３）との隙間を通って油溜室の外に油が漏れ
出し、当初の目的を十分に果たすことは出来ないことが
判った。(Problems to be Solved by the Present Invention) In the case of the valve lash adjuster, the opening end edges of the head cap (5) and the inner lid (47) are only in contact with the release side end surface of the plunger (4). Therefore, the head cap (5), the inner lid (47) and the plunger (4)
The oil leaks from a small gap between the abutting part and the head cap (5) and the inner lid (47) and through the gap between the head cap (5) and the cylinder (3) to the outside of the oil reservoir. It was found that the oil leaked out and could not fulfill the original purpose.
内蓋（47）をプランジャ（４）に一体に接合すれば、上
記問題は解決できるが、製作工程が増えると共に、小部
品どうしの接合は、加工が困難であり、大量生産に適さ
ず、又、不良品の率が高くなって歩止まりが悪く、コス
ト高を招来する。If the inner lid (47) is integrally joined to the plunger (4), the above problem can be solved, but as the manufacturing process increases, the joining of the small parts is difficult to process and is not suitable for mass production. However, the rate of defective products is high and the yield is poor, resulting in high costs.
本発明は、上記問題を解決するためになされたものであ
って、上記内蓋に相当するものを塑性加工によりプラン
ジャと一体に形成する方法を明らかにし、前記問題を解
決することを目的とする。The present invention has been made in order to solve the above problems, and an object of the present invention is to clarify a method of integrally forming an object corresponding to the inner lid with a plunger by plastic working, and to solve the above problems. .
（課題を解決する手段） 本発明は、有底筒体のブランク（９）をダイの型穴に嵌
め、ブランクの筒部の拡径を阻止しつつ、ブランクの開
口部を塑性加工により、筒部に連続して軸心と直交する
面に対して45〜55°のテーパ面（49）及び、該テーパ面
（49）の先端に小径周壁（42）を具えた形状とし、 次で、ブランク（９）を次のダイの型穴に嵌め、テーパ
面（49）を筒部の軸心と平行に加圧して、筒部の軸心と
直交する面内で環状平面を成す肩部（46）を、小径周壁
（42）に接近して形成することを特徴とする。(Means for Solving the Problem) According to the present invention, a blank (9) having a bottomed cylindrical body is fitted into a die hole of a die to prevent the cylindrical portion of the blank from expanding in diameter while plastically processing the opening of the blank to form a cylinder. The tapered surface (49) of 45 to 55 ° with respect to the surface that is continuous with the axis and the small diameter peripheral wall (42) at the tip of the tapered surface (49), and then the blank (9) is fitted in the die hole of the next die, and the tapered surface (49) is pressed in parallel with the axis of the cylinder to form a shoulder (46) forming an annular flat surface in a plane orthogonal to the axis of the cylinder. ) Is formed close to the small diameter peripheral wall (42).
（作用及び効果） 有底筒状ブランク（９）を塑性加工して従来の内蓋に相
当する周壁（42）をプランジャ筒体（48）と一体に形成
したために、従来の様に溶接によってプランジャと内蓋
を接合する場合に比べて生産能率が大幅に向上し、更
に、溶接接合の場合の様に、溶接ビードを研磨する手間
が省け、工程を簡素化ができる。(Operation and effect) Since the bottomed cylindrical blank (9) is plastically processed to form the peripheral wall (42) corresponding to the conventional inner lid integrally with the plunger cylindrical body (48), the plunger is welded as in the conventional case. The production efficiency is significantly improved as compared with the case of joining the inner lid and the inner lid. Further, unlike the case of welding joining, the labor of polishing the welding beads is saved and the process can be simplified.
尚、本発明はバルブラッシュアジャスタに限定されるこ
とはなく、有底筒体の開口部に軸心と直交する肩部（4
6）を具えた筒状体を形成する場合に実施できる。Note that the present invention is not limited to the valve lash adjuster, and the shoulder portion (4
It can be carried out when forming a tubular body having 6).
（実施例） 第３図が本発明によって形成したプランジャ（４）の断
面図、第５図が該プランジャ（４）を具えたバルブラッ
シュアジャスタの断面図である。(Example) FIG. 3 is a sectional view of a plunger (4) formed according to the present invention, and FIG. 5 is a sectional view of a valve lash adjuster having the plunger (4).
バルブラッシュアジャスタは、ロッカアーム（２）中に
開設されたガイド穴（20）に、一端が閉塞し、他端が開
口したシリンダ（３）を閉塞側を外側にして摺動可能に
嵌め込み、該シリンダ内には、底部に弁孔（41）を開設
し、上部が絞り加工された小径の周壁（42）を有し、内
部が油溜室（45）となった円筒状プランジャ（４）を摺
動可能に配備し、プランジャ（４）の開口端には端縁に
当接してヘッドキャップ（５）を被せている。The valve lash adjuster is slidably fitted into a guide hole (20) formed in a rocker arm (2) with a cylinder (3) having one end closed and the other end open, with the closed side facing outward. Inside, a valve hole (41) is opened at the bottom, and a peripheral wall (42) with a small diameter is drawn on the top, and a cylindrical plunger (4) with the inside serving as an oil reservoir (45) is slid. The plunger (4) is movably provided, and the open end of the plunger (4) is covered with a head cap (5) in contact with the edge.
シリンダ（３）の閉塞端（31）がエンジンバルブ（７）
のステム（72）に当接し、該ステム（72）はスプリング
（71）によってシリンダ（３）側に付勢されている。The closed end (31) of the cylinder (3) is the engine valve (7).
Abutting against the stem (72), the stem (72) is urged toward the cylinder (3) by the spring (71).
シリンダ（３）の底部とプランジャ（４）の底部との間
に高圧室（32）が形成され、該高圧室（32）にはプラン
ジャ内部の油溜室（45）から高圧室（32）への一方向の
油の流れを許容するチェック弁（６）が設けられてい
る。A high-pressure chamber (32) is formed between the bottom of the cylinder (3) and the bottom of the plunger (4), and the high-pressure chamber (32) moves from the oil reservoir chamber (45) inside the plunger to the high-pressure chamber (32). A check valve (6) is provided to allow the oil flow in one direction.
プランジャ（４）は小径周壁（42）によって傾き状態の
プランジャ（４）内の油溜室（45）の油の漏れ防止を画
っている。The small diameter peripheral wall (42) of the plunger (4) prevents oil from leaking from the oil reservoir (45) in the tilted plunger (4).
プランジャ（４）は有底筒体（48）の開口部側の中央に
小径周壁（42）が突出し、該周壁と筒体（48）との境界
は軸心に直交して環状平面を成す肩部（46）が形成され
ている。該肩部（46）にキャップ（５）の開口端面が当
接する。The plunger (4) has a small-diameter peripheral wall (42) protruding from the center of the bottomed cylindrical body (48) on the opening side, and the boundary between the peripheral wall and the cylindrical body (48) is a shoulder that forms an annular plane orthogonal to the axis. A part (46) is formed. The opening end surface of the cap (5) contacts the shoulder portion (46).
プランジャ（４）の底部は少し上げ底となっており、中
央に弁孔（41）が開設されている。The bottom of the plunger (4) is slightly raised, and a valve hole (41) is opened in the center.
上記バルブラッシュアジャスタのプランジャ（４）は、
所謂パーツホーマと称される多段式横型トランスファー
プレスによって製造される。第１図に示す底部の中央に
弁孔（41）を開設した有底筒状のブランク（９）は、公
知の方法によって、バー材の剪断から段階的に塑性加工
及び打抜孔加工を行なって得ることが出来る。The plunger (4) of the valve lash adjuster is
It is manufactured by a multi-stage horizontal transfer press called a so-called parts homer. The bottomed cylindrical blank (9) having a valve hole (41) formed in the center of the bottom shown in FIG. 1 is formed by shearing the bar material stepwise by a known method to perform plastic working and punching. You can get it.
上記ブランク（９）を第２図に示す如く、ダイ（81）の
型穴（82）にトランスファーする。The blank (9) is transferred to the die cavity (82) of the die (81) as shown in FIG.
型穴（82）の奥は第１テーパ面（83）と、該第１テーパ
面に連続してダイの真直ノックアウトピン摺動孔（84）
に向かう第２テーパ面（85）とが形成されている。The inner side of the die hole (82) is a first tapered surface (83), and a straight knockout pin sliding hole (84) of the die is continuous with the first tapered surface.
And a second taper surface (85) directed toward.
第１テーパ面（83）は軸心と直交する面に対して45〜55
°を成し、第２テーパ面（85）は、軸心と直交する面に
対して、約80°を成している。The first tapered surface (83) is 45 to 55 with respect to the surface orthogonal to the axis.
The second tapered surface (85) forms an angle of about 80 ° with respect to the surface orthogonal to the axis.
ブランク（９）が嵌まったダイ（81）に対して、先端が
該ダイの底形状に対応するパンチ（86）を打込み、ブラ
ンク（９）の開口部を第１テーパ面（83）に対応してテ
ーパ面（49）を形成し、第２テーパ面（85）に対応し
て、僅か先端側が縮径した周壁（42）を形成する。A die (81) fitted with a blank (9) is punched with a punch (86) whose tip corresponds to the bottom shape of the die, and the opening of the blank (9) corresponds to the first tapered surface (83). Then, a tapered surface (49) is formed, and a peripheral wall (42) is formed corresponding to the second tapered surface (85), the diameter of which is slightly reduced on the tip end side.
次に、上記ブランク（９）を第３図に示す次のダイ（8
7）にトランスファーし、先端が底形状に対応するパン
チ（86）を打込む。Next, the blank (9) is replaced with the next die (8
Transfer to 7), and punch in a punch (86) whose tip corresponds to the bottom shape.
ダイの型穴の奥端は、平坦面の中央部にノックアウトピ
ン摺動孔（89）に連続するテーパ面（88）が形成されて
いる。テーパ面（88）は軸心に直交する面に対して約60
°である。A taper surface (88) continuous with the knockout pin sliding hole (89) is formed at the center of the flat surface at the back end of the die cavity. The taper surface (88) is about 60 with respect to the surface orthogonal to the axis.
°.
本発明で重要な点は、第２図に示す如く、肩部を軸心と
直交する面に対して45〜55°のテーパ面（49）に予備成
形し、第３図に示す、次の工程で肩部（46）を軸心に対
して、平坦に形成する点である。これによって筒体（4
8）は座屈せず、肩部（46）が軸心に対して90°を成
し、更に第７図に示す如く、材料ファイバーが肩部（4
6）において切れることはなく、十分なる耐久性を得る
ことができる。As shown in FIG. 2, the important point in the present invention is that the shoulder portion is preformed into a tapered surface (49) of 45 to 55 ° with respect to a surface orthogonal to the axis, and the following is shown in FIG. This is the point at which the shoulder portion (46) is formed flat with respect to the axis in the process. This allows the cylinder (4
8) does not buckle, the shoulder (46) forms 90 ° with respect to the axis, and as shown in FIG.
There is no breakage in 6), and sufficient durability can be obtained.
前記テーパ面（49）の角度が、第４図Ｂの如く20〜30°
であると、筒体（48）及び先端の周壁（42）が座屈し
て、次の工程での成形が不可能である。The angle of the tapered surface (49) is 20 to 30 ° as shown in FIG. 4B.
In this case, the cylindrical body (48) and the peripheral wall (42) at the tip end buckle, and molding in the next step is impossible.
第４図Ｃの如く、予備成形の肩部の角度が30〜45°の場
合、次の工程に於て第４図Ｄの如く、筒体にリング状の
座屈部（91）が生じて製品にはならない。更に第８図の
如く、材料フアィバーが肩部（46）の近傍で切れてお
り、耐衝撃性に欠ける。As shown in FIG. 4C, when the angle of the preformed shoulder portion is 30 to 45 °, a ring-shaped buckling portion (91) is formed in the cylindrical body in the next step as shown in FIG. 4D. Not a product. Further, as shown in FIG. 8, the material fiber is cut near the shoulder portion (46), and the impact resistance is poor.
第４図Ｇの如く、予備成形で筒体（48）の開口縁を55〜
70°のテーパ面（49）に形成して、次の工程で軸心に対
して直交する肩部（46）と周壁（42）を一挙に成形する
と、第４図Ｈに示す如く、筒体に大きな座屈部（92）が
生じて製品にならない。更に第９図に示す如く、材料フ
アィバーが肩部（46）の近傍で切れており、耐衝撃性に
欠ける。As shown in FIG. 4G, the opening edge of the cylindrical body (48) is preliminarily formed by 55 to 55
When the shoulder portion (46) and the peripheral wall (42) which are orthogonal to the axis are formed at once in the taper surface (49) of 70 ° and are formed in the next step, as shown in FIG. A large buckling part (92) occurs in the product and it does not become a product. Further, as shown in FIG. 9, the material fiber is cut near the shoulder portion (46), and the impact resistance is poor.
第４図Ｉに示す如く、肩部の予備成形のテーパ面（49）
の角度を70〜80°にすると、筒体にリング状座屈部（9
1）が生じ、次工程の成形が不可能である。As shown in Fig. 4I, the preformed tapered surface of the shoulder (49)
When the angle is 70 to 80 °, the ring-shaped buckling part (9
1) occurs, and molding in the next step is impossible.
上記の如く、筒部に連続するテーパ面（49）を45〜55°
に形成し、次の工程で肩部（46）を平坦に形成すると、
座屈せず材料フアィバーが連続した耐久性の優れた製品
を能率的に製造できる。As mentioned above, the taper surface (49) continuous with the tubular part is 45 to 55 °
And the shoulder (46) is formed flat in the next step,
It is possible to efficiently manufacture products with excellent durability in which material fibers are continuous without buckling.
本発明は上記実施例に限定されることはなく、特許請求
の範囲に記載の範囲で種々の変形が可能である。The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the claims.
第１図、第２図、第３図はプランジャの製造工程説明
図、第４図は有底筒体から２段階に肩部を成形する際の
良例と悪例の説明図、第５図は本発明の方法によって形
成したプランジャを内蔵したバルブラッシュアジャスタ
の断面図、第６図はプランジャとヘッドキャップの斜面
図、第７図はプランジャの材料フアィバーの流れの良例
を示す金属組織の図面代用顕微鏡写真、第８図、第９図
は同上の悪例を示す金属組織の図面代用顕微鏡写真、第
10図は従来のプランジャを内蔵したバルブラッシュアジ
ャスタの断面図である。 （42）…周壁、（46）…肩部 （48）…筒体FIGS. 1, 2, and 3 are explanatory views of the manufacturing process of the plunger, FIG. 4 is an explanatory view of a good example and a bad example when forming a shoulder portion from a bottomed cylindrical body in two stages, and FIG. A sectional view of a valve lash adjuster incorporating a plunger formed by the method of the present invention, FIG. 6 is a perspective view of a plunger and a head cap, and FIG. 7 is a drawing substitute of a metal structure showing a good example of the flow of a material fiber of the plunger. Micrographs, FIGS. 8 and 9 are drawing-substitute micrographs of metal structures showing bad examples of the same.
FIG. 10 is a sectional view of a conventional valve lash adjuster with a built-in plunger. (42)… Peripheral wall, (46)… Shoulder (48)… Cylinder
Claims (2)
嵌め、ブランクの筒部の拡径を阻止しつつ、パンチをブ
ランクの軸心と同心に打ち込んでブランクの開口部を塑
性変形させて、筒部に連続して軸心と直交する面に対し
て45〜55°のテーパ面（49）及び、該テーパ面（49）の
先端に小径周壁（42）を形成し、 次で、ブランク（９）を次のダイの型穴に嵌め、テーパ
面を筒部の軸心と平行に加圧して、筒部の軸心と直交す
る面内で環状平面を成す肩部（46）を小径周壁（42）に
接近して形成することを特徴とする有底筒体の製法。1. A blank (9) having a bottomed cylindrical body is fitted in a die cavity to prevent the diameter of the blank cylindrical portion from expanding, and a punch is driven concentrically with the blank axis to open the blank opening. By plastically deforming, a taper surface (49) of 45 to 55 ° with respect to a surface which is continuous with the tubular portion and is orthogonal to the axis is formed, and a small diameter peripheral wall (42) is formed at the tip of the taper surface (49), Next, the blank (9) is fitted into the die hole of the next die, and the tapered surface is pressed in parallel with the axis of the tube to form a shoulder (which forms an annular flat surface in a plane orthogonal to the axis of the tube ( 46) A method for producing a bottomed cylindrical body, characterized in that the inner peripheral wall (46) is formed close to the small diameter peripheral wall (42).
設したブランク（９）をダイの型穴に嵌め、ブランクの
筒部の拡径を阻止しつつ、パンチをブランクの軸心と同
心に打ち込んでブランクの開口部を塑性変形させて、筒
部に連続して軸心と直交する面に対して45〜55°のテー
パ面（49）及び、該テーパ面（49）の先端に小径周壁
（42）を形成し、 次で、ブランクを上記とは別のダイの型穴に嵌めてブラ
ンクの筒部の拡径を阻止しつつ、テーパ面（49）を筒部
の軸心と平行に加圧して、筒部の軸心と直交する面内で
環状平面を成す肩部（46）を小径周壁（42）に接近して
形成することを特徴とする油圧式バルブラッシュアジャ
スタ用プランジャの製法。2. A blank (9) which is formed in a bottomed cylinder and has a valve hole (41) formed in the bottom is fitted in a die hole to prevent the cylinder of the blank from expanding in diameter while punching the blank of the punch. By tapping concentrically with the axis and plastically deforming the opening of the blank, a taper surface (49) of 45 to 55 ° with respect to a surface that is continuous with the cylinder and is orthogonal to the axis, and the taper surface (49) A small diameter peripheral wall (42) is formed at the tip of the blank, and then the blank is fitted into a die hole different from the above to prevent the blank cylinder from expanding in diameter, while the tapered surface (49) is fitted to the cylinder. A hydraulic valve lash characterized in that a shoulder portion (46) forming an annular plane in a plane orthogonal to the axial center of the tubular portion is formed close to the small diameter peripheral wall (42) by applying pressure parallel to the axial center. How to make a plunger for an adjuster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24840589A JPH074633B2 (en) | 1989-09-25 | 1989-09-25 | Manufacturing method of bottomed cylinder with shoulder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24840589A JPH074633B2 (en) | 1989-09-25 | 1989-09-25 | Manufacturing method of bottomed cylinder with shoulder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03110033A JPH03110033A (en) | 1991-05-10 |
| JPH074633B2 true JPH074633B2 (en) | 1995-01-25 |
Family
ID=17177624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24840589A Expired - Fee Related JPH074633B2 (en) | 1989-09-25 | 1989-09-25 | Manufacturing method of bottomed cylinder with shoulder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH074633B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124038A (en) * | 1985-11-22 | 1987-06-05 | Daiwa Can Co Ltd | Manufacture of can for canning having gently sloping shoulder part |
-
1989
- 1989-09-25 JP JP24840589A patent/JPH074633B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124038A (en) * | 1985-11-22 | 1987-06-05 | Daiwa Can Co Ltd | Manufacture of can for canning having gently sloping shoulder part |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03110033A (en) | 1991-05-10 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |