JPH0367468B2 - - Google Patents
Info
- Publication number
- JPH0367468B2 JPH0367468B2 JP60157941A JP15794185A JPH0367468B2 JP H0367468 B2 JPH0367468 B2 JP H0367468B2 JP 60157941 A JP60157941 A JP 60157941A JP 15794185 A JP15794185 A JP 15794185A JP H0367468 B2 JPH0367468 B2 JP H0367468B2
- Authority
- JP
- Japan
- Prior art keywords
- casting
- surplus
- weir
- parts
- product
- 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
- 238000005266 casting Methods 0.000 claims description 49
- 238000005520 cutting process Methods 0.000 claims description 23
- 238000003825 pressing Methods 0.000 claims description 10
- 239000000047 product Substances 0.000 description 27
- 238000005452 bending Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Punching Or Piercing (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は鋳物の製造時に該鋳物に生じる余剰部
を除去する鋳物の余剰部除去装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a casting surplus removal device for removing surplus produced in a casting during production of the casting.
（従来技術）
鋳物の鋳造時、特に複雑な形状の鋳物を鋳造す
る場合には、キヤビテイ内の空気や塵埃等を排出
するための揚がりや、注湯時の熱収縮によつて生
じた空間に湯を補つて鋳物に巣が生じることを防
止するための押し湯が鋳造方案上利用されること
がある。この場合、これらの揚がりや押し湯は鋳
造後には製品部に対する余剰部となるので取り除
く必要があるが、その取り除き方法としては、例
えば特開昭57−41877号公報に開示されているよ
うに、余剰部と製品部との間に設けられた堰部を
折り曲げることによつて両者を分離するのが通例
である。つまり、第６図に示すように、鋳物１に
設けられた余剰部２を治具３によつて受け止めた
状態で該余剰部２に堰部４，４を介してつながる
製品部５，５を押圧装置６によつて上方から押圧
することにより、該製品部５，５を上記堰部４，
４で余剰部２，２から折り取るのである。その場
合に、堰部にＶ状のノツチを設けて該堰部を折れ
易くする場合がある。しかし、このように曲げ力
だけで余剰部を取り除く場合、第７図に示すよう
に、製品部５の一部の肉５ａが余剰部２側に持ち
去られて該製品部５に欠損部が生じることがあ
る。(Prior art) When casting a casting, especially when casting a casting with a complex shape, it is necessary to use a lift to discharge air and dust from the cavity, and a space created by heat shrinkage during pouring. A riser is sometimes used in casting methods to supplement hot water and prevent cavities from forming in the casting. In this case, these fries and risers become surplus to the product after casting and must be removed, but methods for removing them include, for example, as disclosed in Japanese Patent Application Laid-Open No. 57-41877. It is customary to separate the excess portion and the product portion by bending a dam provided between the two. That is, as shown in FIG. 6, with the surplus part 2 provided in the casting 1 received by the jig 3, the product parts 5, 5 connected to the surplus part 2 via the weir parts 4, 4 are inserted. By pressing from above with the pressing device 6, the product parts 5, 5 are pressed against the dam parts 4, 5.
4, the excess parts 2 and 2 are broken off. In this case, a V-shaped notch may be provided in the dam to make it easier to break. However, when removing the surplus part only by bending force in this way, as shown in FIG. Sometimes.
（発明の目的）
本発明は鋳物の余剰部を除去する場合における
上記のような問題に対処するもので、製品部に欠
損部分を生じることなく余剰部を除去し得る余剰
部除去装置を提供し、これにより不良品の発生を
防止することを目的とする。(Object of the Invention) The present invention addresses the above-mentioned problems when removing surplus parts of castings, and provides a surplus part removal device that can remove surplus parts without causing defects in the product part. The purpose of this is to prevent the occurrence of defective products.
（発明の構成）
上記目的達成のため、本発明は次のように構成
したことを特徴とする。(Structure of the Invention) In order to achieve the above object, the present invention is characterized by the following structure.
即ち、本発明は、ノツチを有する堰部を介して
製品部の外側につながる鋳物の鋳造方案部分とし
ての余剰部を除去する鋳物の余剰除去装置におい
て、上記製品部の外側のバリを切断する刃部を内
縁に有する開口部が設けられた抜き型と、該製品
部を押圧するポンチ型とを備えると共に、上記抜
き型における開口部の外側に、鋳物のセツト時に
上記余剰部の堰部より下方の部位に当接してポン
チ型の押圧力に基づく引張り力を堰部に発生させ
る斜面部と、該斜面部と上記刃部との間に斜面部
に連続して設けられ、鋳物のセツト時に堰部の下
方に間隔を形成する上面部とを設ける。 That is, the present invention provides a casting surplus removal device for removing surplus parts as a casting plan part of a casting connected to the outside of the product part via a weir part having a notch, and a blade for cutting off burrs on the outside of the product part. A cutting die is provided with an opening having an inner edge thereof, and a punch die for pressing the product part, and a punching die is provided outside of the opening in the cutting die below the dam of the surplus part when setting the casting. A slope part is provided continuously to the slope part between the slope part and the blade part to generate a tensile force on the weir part based on the pressing force of the punch type, and the weir part is connected to the weir part when the casting is set. and an upper surface portion forming a space below the portion.
このような構成によれば、抜き型の開口部内縁
に設けられた刃部とポンチ型とによつて鋳物の製
品部外側のバリが除去されると共に、特に、鋳物
を抜き型上にセツトしたときに、該鋳物の製品部
の外側に堰部を介してつながる余剰部の堰部より
下方の部位が抜き型における開口部の外側に設け
られた斜面部に当接し、且つ上記堰部の下方に間
隔が生じるので、製品部をポンチ型によつて押圧
したときに、その反力に基づいて余剰部を介して
堰部に引張り力が作用することになる。そして、
この引張り力が上記堰部に設けられたノツチの方
向に沿つて集中するため、更にポンチ型の押圧力
による曲げ力が堰部に作用した時に、この引張り
力が集中しているノツチの部分からその方向に沿
つてクラツクが発生して余剰部が折り取られるこ
とになる。この場合に、余剰部は曲げ力と引張り
力との相乗効果によつて折り取られるので、曲げ
力だけで折り取る場合に比べて小さな押圧力で足
りることになる。 According to such a configuration, burrs on the outside of the product part of the casting are removed by the blade provided on the inner edge of the opening of the cutting die and the punch die, and in particular, when the casting is set on the cutting die, burrs are removed from the outside of the product. In some cases, a part of the surplus part connected to the outside of the product part of the casting via the weir part below the weir part contacts a slope part provided outside the opening in the cutting die, and the part below the weir part Since there is a gap between the parts, when the product part is pressed by the punch die, a tensile force is applied to the weir part through the surplus part based on the reaction force. and,
Since this tensile force is concentrated along the direction of the notch provided in the weir, when the bending force due to the pressing force of the punch type acts on the weir, the tensile force is concentrated in the direction of the notch. A crack will occur along that direction and the excess portion will be broken off. In this case, since the excess portion is broken off by the synergistic effect of the bending force and the tensile force, a smaller pressing force is sufficient compared to the case where the excess portion is broken off using only the bending force.
（発明の効果）
上記の構成によれば、鋳物の製品部外側のバリ
が除去されるのは勿論、そのときのポンチ型の一
連の動作により、抜き型の斜面部と上面部の作用
で、上記製品部にノツチを有する堰部を介してつ
ながる余剰部が上記ノツチの方向に沿つて正しく
折り取られることになり、製品部に欠損部分が生
じることが防止される。これにより不良品の発生
が防止され、歩留りが向上することになる。(Effects of the Invention) According to the above configuration, not only the burrs on the outside of the cast product are removed, but also the series of operations of the punch die at that time, and the action of the slope portion and the upper surface portion of the punch die. The surplus portion connected to the product portion via the weir portion having the notch is correctly broken off along the direction of the notch, thereby preventing the production of a missing portion in the product portion. This prevents the production of defective products and improves yield.
（実施例） 以下、本発明の実施例について説明する。(Example) Examples of the present invention will be described below.
先ず、第１図によつてこの実施例の対象となる
鋳物について説明すると、この鋳物１０は自動車
部品の１つであるナツクルアームの素材であつ
て、中央のボス部１１と該ボス部１１から両側に
延びる軸部１２，１２と上記ボス部１１から三方
に延びる３つのアーム部１３…１３とを有する製
品部１４と、上記軸部１２，１２の夫々から堰部
１５，１５を介して同方向に突出した余剰部１
６，１６とから構成されている。上記の余剰部１
６，１６は鋳造時に用いられた押し湯であつて、
第２図に示すように上方に伸びる縦長の形状とさ
れていると共に、下部には下方に突出する突部１
６ａが設けられている。また、上記堰部１５には
上下同位置に一対のＶ状のノツチ１５ａ，１５ａ
が設けられている。尚、第１図に示すように、こ
の種の鋳物には、鋳造時に周辺部における上型と
下型との合わせ面に対応する箇所にバリ１７が生
じる。 First, referring to FIG. 1, we will explain the casting that is the subject of this embodiment.This casting 10 is a material for a knuckle arm, which is one of the automobile parts. A product part 14 having shaft parts 12, 12 extending in the same direction and three arm parts 13...13 extending in three directions from the boss part 11; Surplus part 1 protruding from
It is composed of 6 and 16. Above surplus part 1
6 and 16 are risers used during casting,
As shown in Figure 2, it has a vertically elongated shape that extends upward, and a protrusion 1 that protrudes downward at the bottom.
6a is provided. Further, the weir portion 15 has a pair of V-shaped notches 15a, 15a at the same position above and below.
is provided. As shown in FIG. 1, burrs 17 are generated in this type of casting at a location corresponding to the mating surface between the upper mold and the lower mold in the peripheral region during casting.
次に第３〜５図に示す余剰部除去装置２０につ
いて説明する。 Next, the surplus portion removing device 20 shown in FIGS. 3 to 5 will be explained.
この余剰部除去装置２０は、上記鋳物１０にお
けるバリ１７と余剰部１６，１６とを製品部１４
から除去するものであつて、上記製品部１４を通
過させる開口部２２を有する抜き型２１と、鋳物
１０を該抜き型２１に載置した状態で製品部１４
を上方から押圧するポンチ型３１とを有する。上
記抜き型２１には、開口部２２の周辺にバリ１７
を除去するための刃２３が備えられていると共
に、鋳物１０における余剰部１６，１６に略対応
する位置には軸部１２，１２から折り取られた余
剰部１６，１６を落下させるための余剰部落し穴
２４，２４が設けられている。また、この抜き型
２１の上記開口部２２における鋳物１０の軸部１
２，１２に対応する部分と上記落し穴２４，２４
との間の抜き型２１の部分は橋渡し部２５，２５
となつており、この橋渡し部２５，２５における
鋳物１０の堰部１５，１５に対応する位置には該
堰部１５，１５を収納するための上面部としての
凹部２５ａ，２５ａが設けられている。 This surplus part removing device 20 removes the burr 17 and surplus parts 16, 16 in the casting 10 from the product part 14.
A cutting die 21 having an opening 22 through which the product section 14 passes, and a cutting die 21 with the casting 10 placed on the cutting die 21.
It has a punch die 31 for pressing from above. The cutting die 21 has burrs 17 around the opening 22.
In addition, a blade 23 is provided for removing the surplus parts 16, 16 broken off from the shaft parts 12, 12 at positions approximately corresponding to the surplus parts 16, 16 in the casting 10. Buraku holes 24, 24 are provided. Also, the shaft portion 1 of the casting 10 in the opening 22 of this cutting die 21
Parts corresponding to 2 and 12 and the above pitfalls 24 and 24
The part of the cutting die 21 between the bridging parts 25, 25
At positions corresponding to the weir parts 15, 15 of the casting 10 in the bridging parts 25, 25, recesses 25a, 25a are provided as upper surface parts for accommodating the weir parts 15, 15. .
然して、この抜き型２１においては、第５図に
示すように、上記橋渡し部２５，２５の上面に落
し穴２４，２４側に向つて下方に傾斜する斜面部
２５ｂ，２５ｂが形成され、上記鋳物１０をこの
抜き型２１に所定の位置関係で載置した時に該鋳
物１０の余剰部１６，１６に設けられた突部１６
ａ，１６ａの角部が１６ｂ，１６ｂが該抜き型２
１の斜面部２５ｂ，２５ｂに当接するようになつ
ている。尚、この時に、鋳物１０における堰部１
５，１５の下面は上記橋渡し部２５，２５に設け
られた凹部２５ａ，２５ａの底面に密着すること
なく、所定間隔ａ（第５図参照）が保たれるよう
になつている。 In this cutting die 21, as shown in FIG. 5, slope parts 25b, 25b are formed on the upper surfaces of the bridging parts 25, 25, and slope parts 25b, 25b are inclined downwardly toward the pit holes 24, 24 side, so that the casting 10 When placed on this cutting die 21 in a predetermined positional relationship, the protrusions 16 provided on the surplus parts 16, 16 of the casting 10
The corners of a and 16a are 16b and 16b are the cutting die 2
It comes into contact with the slope portions 25b, 25b of No.1. In addition, at this time, the weir part 1 in the casting 10
The lower surfaces of the bridging portions 25 and 15 do not come into close contact with the bottom surfaces of the recesses 25a and 25a provided in the bridging portions 25 and 25, but are kept at a predetermined distance a (see FIG. 5).
次に、この余剰部除去装置２０の作用を第５図
を用いて説明する。尚、２個の余剰部１６，１６
対する作用は同一であるので、一方の余剰部につ
いてのみ説明する。 Next, the operation of this surplus portion removing device 20 will be explained using FIG. 5. In addition, two surplus parts 16, 16
Since the effects are the same, only one of the redundant parts will be explained.
先ず、鋳物１０を所定の位置関係で抜き型２１
に載置すると、鋳物１０の余剰部１６における突
部１６ａの角部１６ｂが抜き型２１における橋渡
し部２５の斜面部２５ｂに当接すると共に、堰部
１５の下方には上記橋渡し部２５の凹部２５ａに
よつて間隔ａが生じる。この状態で上方からポン
チ型３１を下動させて鋳物１０における製品部１
４を押圧すれば、その押圧力が余剰部１６におけ
る上記角部１６ｂを介して抜き型２１における橋
渡し部２５の斜面部２５ｂに作用するので、その
反力として曲げ力F1が余剰部１６に作用すると
共に、該反力の分力として余剰部１６に横方向の
力F2が発生し、この力F2が堰部１５に対して引
張り力F3となつて作用する。ところで、この堰
部１５には上下にノツチ１５ａ，１５ａが対応位
置させて設けられているが、このノツチ１５ａ，
１５ａを上下に結ぶ断面が堰部１５における最小
断面積となる部分であるので、鎖線で示す上下一
対のノツチ１５ａ，１５ａを結ぶラインＸに沿つ
て上記引張り力F3による引張り応力が集中する。
このような状態で更にポンチ型３１を下動させれ
ば、該引張り力F3及び上記曲げ力F1が増大して
鋳物１０における堰部１５の下面のノツチ１５ａ
に先ずクラツクが発生するが、上下のノツチ１５
ａ，１５ａを結ぶラインＸには引張り応力が集中
しているので、クラツクは該ラインＸに沿つて成
長することになる。そして、終にはこのラインＸ
に沿つて余剰部１６が製品部１４から折り取られ
て抜き型２１の落し穴２４内に落下することにな
る。このように鋳物１０における余剰部１６は堰
部１５に設けられた上下一対のノツチ１５ａ，１
５ａを結ぶラインＸに沿つて製品部１４から折り
取られるので、製品部１４に欠損部分を生じるこ
となく除去されることになる。 First, the casting 10 is placed in a cutting die 21 in a predetermined positional relationship.
When the casting 10 is placed on the surplus portion 16, the corner portion 16b of the protrusion 16a contacts the slope portion 25b of the bridging portion 25 of the cutting die 21, and the concave portion 25a of the bridging portion 25 is located below the weir portion 15. The interval a is created by . In this state, the punch die 31 is moved downward from above to form the product part 1 in the casting 10.
4, the pressing force acts on the slope portion 25b of the bridging portion 25 in the cutting die 21 via the corner portion 16b of the surplus portion 16, so that a bending force F1 is applied to the surplus portion 16 as a reaction force. At the same time, a lateral force F 2 is generated in the surplus portion 16 as a component of the reaction force, and this force F 2 acts on the weir portion 15 as a tensile force F 3 . By the way, this weir part 15 is provided with notches 15a, 15a in corresponding positions above and below.
Since the cross section connecting the upper and lower notches 15a is the minimum cross-sectional area of the weir portion 15, the tensile stress due to the above-mentioned tensile force F3 is concentrated along the line X connecting the pair of upper and lower notches 15a, 15a shown by the chain line.
If the punch die 31 is further moved downward in this state, the tensile force F 3 and the bending force F 1 increase, and the notch 15a on the lower surface of the weir portion 15 in the casting 10 is formed.
First, a crack occurs, but the upper and lower notches 15
Since tensile stress is concentrated on the line X connecting a and 15a, the crack will grow along the line X. And finally this line
The surplus portion 16 is broken off from the product portion 14 along the lines and falls into the pit 24 of the cutting die 21. In this way, the surplus part 16 in the casting 10 is formed by a pair of upper and lower notches 15a and 1 provided in the weir part 15.
Since it is broken off from the product part 14 along the line X connecting 5a, the product part 14 is removed without creating any missing parts.
尚、鋳物１０において上述のように余剰部１
６，１６が除去された後には、更に上記ポンチ型
３１が下動することにより、鋳物１０におけるバ
リ１７と堰部１５，１５の製品部１４側に残留し
た部分とが抜き型２１に設けられた刃２３によつ
て削除されることになる。 In addition, in the casting 10, as mentioned above, the surplus part 1
After the parts 6 and 16 are removed, the punch die 31 is further moved down, so that the burr 17 in the casting 10 and the portions of the weir parts 15 and 15 remaining on the product part 14 side are provided in the cutting die 21. This will be removed by the blade 23.
また、上記のように鋳物１０における余剰部１
６，１６の除去動作は曲げ力と引張り力との相乗
作用で行われるので、曲げ力だけで余剰部を折り
取つていた従来のものと比べてポンチ型３１によ
る押圧力が小さくても足りることになり、従つて
該余剰部除去装置２０の耐久性が向上することに
なる。 Further, as described above, the surplus portion 1 in the casting 10
Since the removal operation of 6 and 16 is performed by the synergistic effect of bending force and tensile force, it is sufficient that the pressing force by the punch die 31 is smaller compared to the conventional method in which the excess portion is broken off by bending force alone. Therefore, the durability of the surplus portion removing device 20 is improved.
第１図は本発明の対象となる鋳物の平面図、第
２図は第１図−線で切断した鋳物の要部拡大
縦断面図である。第３〜５図は本発明の実施例を
示すもので、第３図は抜き型の平面図、第４図は
第３図−線で切断した余剰部除去装置の縦断
面図、第５図は第４図−線で切断した余剰部
周辺の拡大縦断面図である。また、第６図は従来
例を示す正面図、第７図は従来の問題点を示す製
品概略図である。
１０……鋳物、１４……製品部、１５……堰
部、１５ａ……ノツチ、１６……余剰部、２０…
…余剰部除去装置、２１……抜き型、２２……開
口部、２３……刃部、２５ａ……上面部（凹部）、
２５ｂ……斜面部、３１……ポンチ型、ａ……間
隔。
FIG. 1 is a plan view of a casting to which the present invention is applied, and FIG. 2 is an enlarged longitudinal cross-sectional view of the principal part of the casting taken along the line--in FIG. 3 to 5 show embodiments of the present invention, in which FIG. 3 is a plan view of the cutting die, FIG. 4 is a vertical cross-sectional view of the surplus portion removing device taken along the line of FIG. 3, and FIG. 4 is an enlarged longitudinal sectional view of the vicinity of the surplus portion taken along the line in FIG. 4. Moreover, FIG. 6 is a front view showing a conventional example, and FIG. 7 is a product schematic diagram showing problems of the conventional example. 10... Casting, 14... Product part, 15... Weir part, 15a... Notch, 16... Surplus part, 20...
... Surplus part removal device, 21 ... Cutting die, 22 ... Opening, 23 ... Blade, 25a ... Upper surface part (recess),
25b... Slope portion, 31... Punch type, a... Interval.
Claims (1)
つながる鋳物の鋳造方案部分としての余剰部を除
去する装置であつて、上記製品部の外側のバリを
切断する刃部を内縁に有する開口部が設けられた
抜き型と、該製品部を押圧するポンチ型とを有す
ると共に、上記抜き型の開口部より外側に、鋳物
のセツト時に上記余剰部の堰部より下方の部位に
当接してポンチ型の押圧力に基づく引張り力を堰
部に発生させる斜面部、並びに該斜面部と上記刃
部との間に該斜面部に連続して設けられ、鋳物の
セツト時に堰部の下方に間隔を形成する上面部が
設けられていることを特徴とする鋳物の余剰部除
去装置。1. A device for removing the surplus part as a casting plan part of a casting connected to the outside of the product part via a weir part having a notch, and an opening having a blade part on the inner edge for cutting off burrs on the outside of the product part. It has a punch die which presses the product part, and a punch die which is placed outside the opening of the die and comes into contact with a part below the dam of the surplus part when setting the casting. A slope part that generates a tensile force based on the pressing force of the mold in the weir part, and a slope part provided continuously with the slope part between the slope part and the blade part, and a space is provided below the weir part when setting the casting. A device for removing surplus parts of a casting, characterized in that it is provided with an upper surface part for forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15794185A JPS6216866A (en) | 1985-07-16 | 1985-07-16 | Device for removing excess part of casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15794185A JPS6216866A (en) | 1985-07-16 | 1985-07-16 | Device for removing excess part of casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6216866A JPS6216866A (en) | 1987-01-26 |
| JPH0367468B2 true JPH0367468B2 (en) | 1991-10-23 |
Family
ID=15660811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15794185A Granted JPS6216866A (en) | 1985-07-16 | 1985-07-16 | Device for removing excess part of casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6216866A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5189416B2 (en) * | 2007-10-05 | 2013-04-24 | 保明 奥谷 | Weir-folding method for separating cast products and scrap materials from the plan, and the weir-folding device |
| CN102069179B (en) * | 2011-01-12 | 2012-11-07 | 江阴鑫宝利金属制品有限公司 | Turbine gate cutting device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5511256B2 (en) * | 1975-09-05 | 1980-03-24 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5511256U (en) * | 1978-07-04 | 1980-01-24 |
-
1985
- 1985-07-16 JP JP15794185A patent/JPS6216866A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5511256B2 (en) * | 1975-09-05 | 1980-03-24 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6216866A (en) | 1987-01-26 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |