Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work
Patent
1994-05-24
1997-05-20
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
264102, 264234, 264346, B29C 4502, B29C 4573
Patent
active
056309716
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 male portions, in their operational mounted position, being of the shape and dimensions of the bobbin which it is desired to produce, the mold being provided with a resin inlet and vacuum port in communication with the 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 two parts, the two parts, when connected, being essentially sealed against pressure loss along their contact surfaces; d) causing a curable resin to flow into the gap through the resin inlet, while applying a vacuum at the vacuum port, until the empty space provided within the 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.
REFERENCES:
patent: 4174367 (1979-11-01), Breher
patent: 4876050 (1989-10-01), Horton
patent: 4995698 (1991-02-01), Myers
patent: 5228186 (1993-07-01), Brettell et al.
patent: 5261980 (1993-11-01), Pearce
State of Israel, Ministry of Defence Rafael-Armaments Developmen
Timm Catherine
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