Production of composite insulators by injecting different screens onto an insulator shank

US7128860B2 · kind B2 · utility

Assignee

• LAPP INSULATORS GMBH & CO. KG · DE

Inventors

• Rene Mainardis · Selb, DE
• Michael Braune · Wunsiedel, DE

Key dates

• Filing date: Oct 12, 2001
• Grant date: Oct 31, 2006
• Expiry date: Jan 15, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2031/3412
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to the production of composite insulators consisting of a shank in the form of a bar or a tube, which is provided with a covering and which comprises plate-like screens which are distanced from each other. The covering and the screens are made of an elastomer material with high insulating qualities. As a result, the number, distance, form and size of the screens can vary from insulator to insulator. According to the invention, at least one injection mould (10a, 10b, 11a, 11b, 12a, 12b, 13a, 13b) for injecting a screen (2, 3, 4, 5, 19, 20, 21, 22) is arranged downstream from a device which is used to provide the shank (1) with a covering. The injection mould can be advanced in order to inject a screen upon the shank and opened in order to unmould said screen. An advancing device is also provided in order to displace (16) the shank (1) or the screen mould. Each time the shank (1) or the screen mould is displaced, the position of the latter with respect to the shank enables a subsequent screen to be injected.