Molded part and method of making the same

A molded part, formed in a mold, comprising:

• a metal plate formed with a plurality of through holes;
• and
• a plurality of molded resin structures, each of said resin structures including a first substantially planar surface portion disposed on a first side of the metal plate, a second substantially planar surface portion disposed on a second side of the metal plate, a further portion integrally formed with and interposed between said first and second substantially planar portions, said further portion extending through the respective through holes in the metal plate, and a substantially columnar portion integrally formed with one of said first and second substantially planar surface portions on a side thereof opposite said further portion, said first and second substantially planar surface portions having a cross-sectional surface greater than a cross-section of the through holes and with said further portion securing the columnar portions in place on said metal plate separate from and independent of each other by virtue of a residual thermal stress produced by a difference in a coefficient of thermal expansion between said first and second substantially planar portions, said further portions and said metal plate;
• wherein said structures are provided to be separate from and independent of each other when said molded part is removd from said mold, and wherein a radially oriented residual thermal stress in each of said first and second substantially planar surface portions and said further portions is symmetrical with respect to a center axis of each of said molded resin structures.