JPS5550406A - Production of portable watch case - Google Patents

Production of portable watch case

Info

Publication number
JPS5550406A
JPS5550406A JP12294578A JP12294578A JPS5550406A JP S5550406 A JPS5550406 A JP S5550406A JP 12294578 A JP12294578 A JP 12294578A JP 12294578 A JP12294578 A JP 12294578A JP S5550406 A JPS5550406 A JP S5550406A
Authority
JP
Japan
Prior art keywords
case
stainless steel
sheet
base
watch case
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.)
Pending
Application number
JP12294578A
Other languages
Japanese (ja)
Inventor
Kotaro Kashima
Seizo Masuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP12294578A priority Critical patent/JPS5550406A/en
Publication of JPS5550406A publication Critical patent/JPS5550406A/en
Pending legal-status Critical Current

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  • Powder Metallurgy (AREA)

Abstract

PURPOSE: To produce the portable watch case which is superior in abrasion resistance and scratch-proofness and has a beautiful mirror surface by making a plastic sheet through mixing of resin in hard stock powder and compression bonding and sintering the same to the case made of stainless steel with or without the use of braze material.
CONSTITUTION: WC being raw material for sintered hard alloy and Co being a binder are mixed and ground in a ball mill. Resins such as styrene base solute, toluene base solvent, phthalic acid base plasticizer, ketone base additive, etc. are sufficiently mixed at a ratio of 1 based on 9 of the mixture of WC and Co. This mixture is rolled with sheet rollers to make a thin plate of 1mm or under in thickness. This thin sheet is clad on the surface of the stainless steel made watch case having beforehand been molded and is then sintered at 1300°C and molding pressure 300 atmospheric pressure, whereby its super hard layer is fusion bonded to the case surface. Or braze material of sheet- or powder form is interposed between the stainless steel made case and super hard material thin plate and the sintering of the super hard material and brazing to the stainless steel made case are accomplished.
COPYRIGHT: (C)1980,JPO&Japio
JP12294578A 1978-10-04 1978-10-04 Production of portable watch case Pending JPS5550406A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12294578A JPS5550406A (en) 1978-10-04 1978-10-04 Production of portable watch case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12294578A JPS5550406A (en) 1978-10-04 1978-10-04 Production of portable watch case

Publications (1)

Publication Number Publication Date
JPS5550406A true JPS5550406A (en) 1980-04-12

Family

ID=14848497

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12294578A Pending JPS5550406A (en) 1978-10-04 1978-10-04 Production of portable watch case

Country Status (1)

Country Link
JP (1) JPS5550406A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60229748A (en) * 1984-04-28 1985-11-15 本田技研工業株式会社 Manufacture of metallic laminate
JPS613805A (en) * 1984-06-19 1986-01-09 Honda Motor Co Ltd Raw material sheet for sintered metallic body and its production

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60229748A (en) * 1984-04-28 1985-11-15 本田技研工業株式会社 Manufacture of metallic laminate
JPS613805A (en) * 1984-06-19 1986-01-09 Honda Motor Co Ltd Raw material sheet for sintered metallic body and its production

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