MY163680A - Aluminum alloy substrate for magnetic disk, method of manufacturing aluminum alloy substrate for magnetic disk, and punching press die assembly of aluminum alloy substrate for magnetic disk - Google Patents

Aluminum alloy substrate for magnetic disk, method of manufacturing aluminum alloy substrate for magnetic disk, and punching press die assembly of aluminum alloy substrate for magnetic disk

Info

Publication number
MY163680A
MY163680A MYPI20053486A MYPI20053486A MY163680A MY 163680 A MY163680 A MY 163680A MY PI20053486 A MYPI20053486 A MY PI20053486A MY PI20053486 A MYPI20053486 A MY PI20053486A MY 163680 A MY163680 A MY 163680A
Authority
MY
Malaysia
Prior art keywords
aluminum alloy
magnetic disk
alloy substrate
die assembly
press die
Prior art date
Application number
MYPI20053486A
Inventor
Takahashi Hideki
Mori Takashi
Ozeki Yasuyuki
Original Assignee
Furukawa Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Publication of MY163680A publication Critical patent/MY163680A/en

Links

Landscapes

  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Punching Or Piercing (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

THE PRESENT INVENTION RELATES TO AN ALUMINUM ALLOY SUBSTRATE (10) FOR A MAGNETIC DISK WITH AN AVERAGE SHEAR DROP HEIGHT AT AN OUTER EDGE EQUAL TO OR LESS THAN 150 µM, AND ITS METHOD OF MANUFACTURE BY PUNCHING A PRESS DIE ASSEMBLY COMPRISING A DIE (20), A PUNCH (30) AND A STRIPPER (31) ALL OF WHICH SERVE TO PUNCH AN ALUMINUM ALLOY RAW STRIP (1) INTO A DOUGHNUT-LIKE SHAPE, AND A DIE SURFACE FOR PUNCHING WHICH HAS A PROJECTION PART (20B) HAVING A FLAT PORTION (12A) OF A PRESCRIBED WIDTH A WITH AN INNER EDGE CONTAINED IN A CUTTING EDGE (20A).
MYPI20053486A 2004-08-03 2005-07-28 Aluminum alloy substrate for magnetic disk, method of manufacturing aluminum alloy substrate for magnetic disk, and punching press die assembly of aluminum alloy substrate for magnetic disk MY163680A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004227304A JP2006048817A (en) 2004-08-03 2004-08-03 Aluminum alloy substrate for magnetic disk, manufacturing method thereof, and die for punching press of aluminum alloy substrate for magnetic disk

Publications (1)

Publication Number Publication Date
MY163680A true MY163680A (en) 2017-10-13

Family

ID=36027175

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI20053486A MY163680A (en) 2004-08-03 2005-07-28 Aluminum alloy substrate for magnetic disk, method of manufacturing aluminum alloy substrate for magnetic disk, and punching press die assembly of aluminum alloy substrate for magnetic disk

Country Status (2)

Country Link
JP (1) JP2006048817A (en)
MY (1) MY163680A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5064755B2 (en) * 2006-10-10 2012-10-31 古河電気工業株式会社 Circular substrate, circular substrate processing method and processing apparatus
JP4884915B2 (en) * 2006-10-11 2012-02-29 古河電気工業株式会社 Circular substrate punching press mold and magnetic alloy aluminum alloy substrate manufacturing apparatus

Also Published As

Publication number Publication date
JP2006048817A (en) 2006-02-16

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