Method of manufacturing a composite insulator
US4702873A · kind A · utility
15Cited by
13References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 22, 1986 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | May 22, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/3412
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of molding the insulating covering of an organic electrical insulator comprising a long central rod (3) having end fittings (5, 6). Retractable supports (11, 12, 21, 22) are disposed at regular intervals along an injection mold for the covering. The covering is injected, and at the end of injection, prior to vulcanization, the supports are retracted. The voids left in the mold (1, 2) by the supports are instantly filled by the injected material. Protective sleeves (24, 25) are interposed between the rod and the said supports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.