Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1982-01-22
1983-12-06
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
26432816, B29F 108
Patent
active
044193211
ABSTRACT:
A method is disclosed for forming an integrated truss structure by means of a mold structure wherein the mold includes a plurality of male mold members each having a plurality of open grooves formed therein which slope away from the top surface thereof. A plurality of female mold members each have a generally circular recessed cavity with a plurality of open grooves which are orthogonally disposed with regard to one another and which slope away from the plane of the recessed cavity. The male and female members are positioned opposite one another with the grooves in the male and female members being aligned to define strut beam chambers and wherein the top of the male member is aligned with the recessed cavity of the female member to define a junction chamber. Thus, the strut beam chambers slope away from the junction chamber. One of the male members is positioned adjacent each female member, and vice versa, to thereby define alternate symmetrical upper and lower junction chambers interconnected by the strut chambers. Channels are formed, preferably in the female members, for injecting a moldable material such as plastic into the strut beam chambers and the junction chambers. After injection occurs, the molds are separated to thereby form an integrally molded truss structure.
REFERENCES:
patent: 2791386 (1957-05-01), Kastan
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