JPS598797U

JPS598797U - Punching mold

Info

Publication number: JPS598797U
Application number: JP10394282U
Authority: JP
Inventors: 青山　隆夫; 榎　芳雄
Original assignee: 松下電器産業株式会社
Priority date: 1982-07-08
Filing date: 1982-07-08
Publication date: 1984-01-20
Also published as: JPS624476Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図はフレキシブル磁気ディスクの平面図であり、ａ
はハブ取付前、ｂはハブ取付時の状態を示し、第２図ａ
は従来上の上金型の断面図、ｂは下金型の断面図、第３
図〜第５図は本考案の実施の一例を示し、第３図ａは上
金型の断面図、ｂは同底面図、第４図ａは下金型の断面
図、ｂは同平面図、第５図ａ＝ｄは打抜過程の説明図で
ある。　　　　、２１・・・基体、２２・・・円柱部、
２３・・・孔、２４・・・ポンチ、２５・・・大径部、
２６・・・外形打抜用ダイ、２７・・・中径部、２８・
・・ノックアウト、２９・・・折曲部、３０・・・弾性
コムブロック、３１・・・バッキング　　　　７プレー
ト、３２・・・ポンチホルダー、３３・・・ボルト１．
３４・・・外形打抜用ポンチ、３５．３６・・・ダイ孔
、３７・・・環状部、３８・・・ストリッパ、３９・・
・弾性ゴムブロック、４０・・・ボルト、４１・・・グ
イホルダー、４２・・・磁気シート、４３・・・ブラン
ク、４４・・・抜残シート、４５・・・抜きかす。FIG. 1 is a plan view of a flexible magnetic disk, and a
shows the state before the hub is installed, b shows the state when the hub is installed, and Fig. 2a shows the state before the hub is installed.
is a cross-sectional view of the conventional upper mold, b is a cross-sectional view of the lower mold, and the third
5 to 5 show an example of the implementation of the present invention, FIG. 3 a is a sectional view of the upper mold, b is a bottom view of the same, FIG. 4 a is a sectional view of the lower mold, and FIG. 4 b is a plan view of the same. , FIG. 5 a = d are explanatory diagrams of the punching process. , 21... Base body, 22... Cylindrical part,
23...hole, 24...punch, 25...large diameter part,
26... Outer punching die, 27... Medium diameter part, 28...
...Knockout, 29...Bending portion, 30...Elastic comb block, 31...Backing 7 plate, 32...Punch holder, 33...Bolt 1.
34... External punch for punching, 35.36... Die hole, 37... Annular part, 38... Stripper, 39...
- Elastic rubber block, 40... Bolt, 41... Gui holder, 42... Magnetic sheet, 43... Blank, 44... Remaining sheet, 45... Scraps.

Claims

[Scope of utility model registration request]

A base made in the form of concentric cylinders with at least three stages of different diameters, the minimum diameter cylindrical part at the lower end being used as a punch for punching a center hole, and a medium diameter part of the base parallel to the axis of the base. another punch that fits into the penetrating hole; a goo for punching out the outer shape that is fixed in a fitted state with the side surface of the large diameter portion of the base body; The main parts include a knockout provided in sliding contact with the side surface of the medium diameter part between the cylindrical part and the minimum diameter cylindrical part, and an elastic rubber block interposed between the large diameter part of the base body and the knockout. An upper mold configured so that the surfaces of the main parts other than the rubber block to the workpiece are on the same plane when no pressure is applied, and a punching die corresponding to the above-mentioned minimum diameter cylindrical part and other punches on the upper surface. a punch for punching an external shape, which is provided with a hole and an annular portion at the lower end; an elastic rubber block provided on the annular portion; A punching die comprising: a stripper in sliding contact; and a lower die configured such that the outer shape punch and the surface of the stripper facing the workpiece are on the same plane when no pressure is applied.