Helical shed
AssigneeTyco Electronics UK Ltd.
InventorsDavid William Maute Thornley, Stephen Andrew Clift, Alan Cook
Life of this patent
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Abstract
A method of providing a shed (2) for a high-voltage insulator (1) comprises the steps of providing a substantially tubular substrate (3), providing an extruder (10) having an extruder head (11) defining an extrusion direction (A), using the extruder (10) to extrude the shed (2) and applying the shed (2) on the substrate (3) while rotating the substrate relative to the extruder head (11). According to the invention, the extrusion direction (A) substantially coincides with the longitudinal axis of the substrate (3), and the substrate (3) is fed through the extruder head (11).
Claims13
Method of providing a helical shed (2) for a high-voltage insulator (1), the method comprising the steps of:
- providing a substantially cylindrical substrate (3);
- providing an extruder (10) having an extruder head (11) defining an extrusion direction (A);
- using the extruder (10) to extrude the shed (2);
- and
- applying the shed (2) on the substrate (3) while rotating the substrate relative to the extruder head (11),
- characterised in that the extrusion direction (A) substantially coincides with the longitudinal axis of the substrate (3), and in that the substrate (3) is fed through the extruder head (11).
Method according to any of the preceding claims, wherein the substrate (3) comprises a fibreglass rod.
Method according to any of the preceding claims, wherein the shed material comprises a silicone resin and/or a polyolefin.
Method according to any of the preceding claims, wherein the substrate (3) has a diameter of between 1 and 10 cm, preferably between 1.5 and 5 cm.
Method according to any of the preceding claims, wherein a continuous sleeve (4) substantially covering the substrate (3) is integrally extruded with the helical shed (2).
High voltage component, comprising a helical shed (2) produced by the method according to any of the preceding claims.
Dependencies are inferred from the claim text.