Patent ID: 6276656
Filing Date: 2001-08-21
Classification: B29C,B29L

Abstract:
A mold for optimizing molding time to form a molded article, said mold containing a plurality of mold portions forming a mold cavity having cavity surfaces in a shape of said molded article, said mold portions comprising:(1) at least one mold die having at least one primary booster adjacent to and in thermal communication therewith, said mold die providing structural support for said primary booster;(2) said primary booster being disposed in the mold cavity and forming at least a part of the cavity surfaces, the primary booster being made of material whose mathematical product of thermal conductivity, density, and specific heat is no more than 2.0.times.10.sup.-6 BTU.sup.2 /sec/in.sup.4 /.degree. F..sup.2 at room temperature, and having predetermined, thicknesses (W.sub.b) as calculated from the equation ##EQU5##where t.sub.f is a time to fill the mold, k.sub.b is thermal conductivity, .rho..sub.b is density, and C.sub.b is specific heat of the primary booster; and,(3) thermal control means for applying temperature control stimuli to the mold die.