JPS57161319A - Forming method of bearing in plastic ground plate - Google Patents

Forming method of bearing in plastic ground plate

Info

Publication number
JPS57161319A
JPS57161319A JP4491981A JP4491981A JPS57161319A JP S57161319 A JPS57161319 A JP S57161319A JP 4491981 A JP4491981 A JP 4491981A JP 4491981 A JP4491981 A JP 4491981A JP S57161319 A JPS57161319 A JP S57161319A
Authority
JP
Japan
Prior art keywords
forming
shaft hole
thin film
ground plate
plastic ground
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
JP4491981A
Other languages
Japanese (ja)
Other versions
JPH0356885B2 (en
Inventor
Kenichi Yoshikawa
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.)
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
Original Assignee
Citizen Holdings Co Ltd
Citizen Watch 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 Citizen Holdings Co Ltd, Citizen Watch Co Ltd filed Critical Citizen Holdings Co Ltd
Priority to JP4491981A priority Critical patent/JPS57161319A/en
Publication of JPS57161319A publication Critical patent/JPS57161319A/en
Publication of JPH0356885B2 publication Critical patent/JPH0356885B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/004—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor characterised by the material used
    • G04B31/016—Plastic bearings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Sliding-Contact Bearings (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To eliminate the necessity for adjusting upper and lower metal molds and improve productivity when an oil accumulated part and shaft hole are simultaneously formed in a plastic ground plate, by forming a thin film between said both oil accumulated part and shaft hole, removing the thin film after forming the above and drilling an extension hole. CONSTITUTION:A plastic ground plate 1, used for analog clocks, is constituted by simultaneously forming an oil accumulated part 2 and shaft hole 3. Here at forming of said both 2, 3, a thin film 5 is simultaneously formed between the both 2, 3. In this way, a metal mold is of such construction that a pin of thin diameter for forming the shaft hole 3 is not adapted to a protrusion, to both eliminate the necessity for a metal mold adjusting time and prevent the pin of thin diameter from a break. And then the thin film 5 is pushed off by a tool 7 to form the shaft hole 3 as an extension hole and form a bearing. In this way, an yield rate of forming, improvement of a rate of machine operation and reduction of metal mold repair time can be attained.
JP4491981A 1981-03-27 1981-03-27 Forming method of bearing in plastic ground plate Granted JPS57161319A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4491981A JPS57161319A (en) 1981-03-27 1981-03-27 Forming method of bearing in plastic ground plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4491981A JPS57161319A (en) 1981-03-27 1981-03-27 Forming method of bearing in plastic ground plate

Publications (2)

Publication Number Publication Date
JPS57161319A true JPS57161319A (en) 1982-10-04
JPH0356885B2 JPH0356885B2 (en) 1991-08-29

Family

ID=12704869

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4491981A Granted JPS57161319A (en) 1981-03-27 1981-03-27 Forming method of bearing in plastic ground plate

Country Status (1)

Country Link
JP (1) JPS57161319A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0496399U (en) * 1991-01-29 1992-08-20

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4720619U (en) * 1971-01-06 1972-11-08
JPS5348166U (en) * 1976-09-28 1978-04-24

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2204697B1 (en) * 1972-10-30 1975-01-03 Metaux Speciaux Sa

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4720619U (en) * 1971-01-06 1972-11-08
JPS5348166U (en) * 1976-09-28 1978-04-24

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0496399U (en) * 1991-01-29 1992-08-20

Also Published As

Publication number Publication date
JPH0356885B2 (en) 1991-08-29

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