JPS5618338A - Manufacture of shadow mask - Google Patents

Manufacture of shadow mask

Info

Publication number
JPS5618338A
JPS5618338A JP9547379A JP9547379A JPS5618338A JP S5618338 A JPS5618338 A JP S5618338A JP 9547379 A JP9547379 A JP 9547379A JP 9547379 A JP9547379 A JP 9547379A JP S5618338 A JPS5618338 A JP S5618338A
Authority
JP
Japan
Prior art keywords
aperture
upper mold
wrinkle
materials
corner
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.)
Granted
Application number
JP9547379A
Other languages
Japanese (ja)
Other versions
JPS5928015B2 (en
Inventor
Mitsuru Matsushita
Izumi Sugimoto
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP54095473A priority Critical patent/JPS5928015B2/en
Publication of JPS5618338A publication Critical patent/JPS5618338A/en
Publication of JPS5928015B2 publication Critical patent/JPS5928015B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
    • H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

PURPOSE:To obtain an aperture of a strong strength by smoothening the flow of materials in the corner of the aperture. CONSTITUTION:When molding the skirted portion 2b, the distance, or heightwise clearance, between the wrinkle-pressing upper and lower molds 12 and 13 is formed to 10-20 times as thick as the material of the work 2'. Then, at the time when the upper mold 10 reaches the lower dead point and the skirted portion 2b is completely formed, the wrinkle-pressing upper mold 12 is lowered to perform the final press molding of the flange portion 2c between the upper mold 12 and the lower mold 13. Large wrinkles produced in the corner flange portion are completely crushed and materials are stacked up either in duplicate or triplicate, giving the aperture 2 of a strong strength.
JP54095473A 1979-07-24 1979-07-24 How to make a shadow mask Expired JPS5928015B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54095473A JPS5928015B2 (en) 1979-07-24 1979-07-24 How to make a shadow mask

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54095473A JPS5928015B2 (en) 1979-07-24 1979-07-24 How to make a shadow mask

Publications (2)

Publication Number Publication Date
JPS5618338A true JPS5618338A (en) 1981-02-21
JPS5928015B2 JPS5928015B2 (en) 1984-07-10

Family

ID=14138599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54095473A Expired JPS5928015B2 (en) 1979-07-24 1979-07-24 How to make a shadow mask

Country Status (1)

Country Link
JP (1) JPS5928015B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6117331A (en) * 1984-06-18 1986-01-25 アールシーエー　ライセンシング　コーポレーシヨン Method and device for molding shadow mask

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6117331A (en) * 1984-06-18 1986-01-25 アールシーエー　ライセンシング　コーポレーシヨン Method and device for molding shadow mask
JPH0337443B2 (en) * 1984-06-18 1991-06-05 Rca Licensing Corp

Also Published As

Publication number Publication date
JPS5928015B2 (en) 1984-07-10

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