Patent Number: 6,444,071

Title: Method of fabricating a removable mandrel for filament winding containers

Abstract: A method of fabricating a removable mandrel for use in filament winding a container, includes the steps of providing and inflating an internal bladder. A dry 3-D fabric layer of a given thickness is layed-up about the inflated bladder. An external vacuum/pressure bag is installed about the dry fabric layer. The dry 3-D fabric layer is impregnated with a liquid soluble resin between the internal bladder and the external bag. The resin then is cured to rigidify the fabric layer to form a mandrel structure. The container then can be wound on the mandrel formed by the cured and rigidified fabric layer, and the resin can be subsequently washed out to remove the fabric layer.

Inventors: Ayorinde; A. John (Lincoln, NE)

Assignee: Shade, Inc.

International Classification: B29C 53/82 (20060101); B29C 53/00 (20060101); B29C 70/24 (20060101); B29C 70/10 (20060101); D03D 11/00 (20060101); B29C 53/60 (20060101); B65H 081/00 ()

Expiration Date: 09/03/2019