B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
B65H 75/18 (2006.01) B29C 39/10 (2006.01) B29C 45/14 (2006.01) B29C 70/36 (2006.01) B65H 75/50 (2006.01) G02B 6/44 (2006.01)
Patent
CA 2124296
-18- METHOD AND APPARATUS FOR MANUFACTURING BOBBINS Abstract A method of manufacturing a bobbin made essentially or partially of a curable resin comprises the steps of: a) providing a mold consisting of a male portion and of a female portion, the gap left between the said female and the said male portions, in their operational mounted position, being of the shape and dimensions of the bobbin which is is desired to produce, the said mold being provided with a resin inlet and vacuum port in communication with the said gap; b) laying on the surface of the male part of the mold or winding thereon, any element or material which it is desired to embed within the resin; c) inserting the male part of the mold into the female part thereof and securely connecting the said two parts, the said two parts, when connected, being essentially sealed against pressure loss along their contact surfaces; d) causing a curable resin to flow into the said gap through the resin inlet, while applying a vacuum at the vacuum port, until the empty space provided within the said gap is substantially entirely filled with resin; e) allowing the resin to solidify; and f) opening the mold and removing the bobbin from the male part thereof.
Goudreau Gage Dubuc
Rafael-Armaments Development Authority State Of Israel Ministry Of Defence
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