Apparatus for and method of manufacturing preforms

Details Apparatus for and method of manufacturing preforms Apparatus for and method of manufacturing preforms

D - Textiles, Paper

04

H

D04H 1/70 (2006.01) B29C 31/08 (2006.01) B29C 33/34 (2006.01) B29C 41/36 (2006.01) B29C 70/30 (2006.01)

Patent

CA 2066200

2066200 9104840 PCTABS00003 An apparatus for manufacturing fiber preforms is described, in which a relatively small motor (36) is able to power a large fan (34) because the fan is kept in a partial vacum condition. A duct (30) connects a fan housing to a vacuum box (24) which has an air flow opening (26) therein of relatively narrow width. A shuttle member (28) is horizontally translatable above the vacuum box (24) on a support bed and the shuttle member is divided into air flow chambers by baffle plates (44). Only a smaller number of air flow chambers can pass above the air flow opening at a single time and this serves to keep low pressure in the vacuum box. In addition, a vortex gate (75) is provided in the duct between the fan housing and the vacuum box and serves to restrict air flow through the duct when the pressure within the duct drops below a certain level.

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