FR2244617A1 - Injection moulded low-friction watch bearing - formed in reinforced plastics plate by symmetrical injection around core - Google Patents

Injection moulded low-friction watch bearing - formed in reinforced plastics plate by symmetrical injection around core

Info

Publication number
FR2244617A1
FR2244617A1 FR7431274A FR7431274A FR2244617A1 FR 2244617 A1 FR2244617 A1 FR 2244617A1 FR 7431274 A FR7431274 A FR 7431274A FR 7431274 A FR7431274 A FR 7431274A FR 2244617 A1 FR2244617 A1 FR 2244617A1
Authority
FR
France
Prior art keywords
bearing
friction
core
low
reinforced plastics
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
FR7431274A
Other languages
French (fr)
Other versions
FR2244617B1 (en
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.)
Ebauches Electroniques SA
Original Assignee
Ebauches Electroniques SA
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
Priority claimed from US400625A external-priority patent/US3897536A/en
Application filed by Ebauches Electroniques SA filed Critical Ebauches Electroniques SA
Publication of FR2244617A1 publication Critical patent/FR2244617A1/en
Application granted granted Critical
Publication of FR2244617B1 publication Critical patent/FR2244617B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
    • B29C45/14344—Moulding in or through a hole in the article, e.g. outsert moulding
    • 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
    • G04B31/06—Manufacture or mounting processes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

A method of moulding a low-friction watch bearing in an opening in an already cast, reinforced plastics plate is as follows: a temporary core is introduced into the opening, so as to define the central passage for the intended bearing; the low-friction plastics to form the bearing is injected in such a way that this material spreads symmetrically around the core so that there are no forces tending to displace it. The temporary core and injection opening are pref. coaxial. Pref., as soon as the plastics forming the bearing has set, the core is withdrawn into a space clear of the bearing. The high strength of the reinforced plastics plate or similar component is combined with the low-friction properties of the bearing material cast into it. By the symmetrical introduction of the material for the latter and its symmetrical flow around the temporary core, a non-shifting arrangement is ensured leading to accurately located bearings. No drilling or similar operations are required.
FR7431274A 1973-09-25 1974-09-16 Injection moulded low-friction watch bearing - formed in reinforced plastics plate by symmetrical injection around core Granted FR2244617A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US400625A US3897536A (en) 1970-12-11 1973-09-25 Process for the manufacture of a frame-work member of a horological device

Publications (2)

Publication Number Publication Date
FR2244617A1 true FR2244617A1 (en) 1975-04-18
FR2244617B1 FR2244617B1 (en) 1978-12-29

Family

ID=23584359

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7431274A Granted FR2244617A1 (en) 1973-09-25 1974-09-16 Injection moulded low-friction watch bearing - formed in reinforced plastics plate by symmetrical injection around core

Country Status (3)

Country Link
CH (2) CH592909B5 (en)
DE (1) DE2444305A1 (en)
FR (1) FR2244617A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114889039A (en) * 2022-04-19 2022-08-12 微智医疗器械有限公司 Retina implant flexible electrode, encapsulation mold and encapsulation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114889039A (en) * 2022-04-19 2022-08-12 微智医疗器械有限公司 Retina implant flexible electrode, encapsulation mold and encapsulation method thereof

Also Published As

Publication number Publication date
FR2244617B1 (en) 1978-12-29
CH592909B5 (en) 1977-11-15
DE2444305A1 (en) 1975-04-10
CH1194274A4 (en) 1977-03-31

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Legal Events

Date Code Title Description
ST Notification of lapse