摘要 |
A mold assembly includes an upper portion having an upper recess in a lower surface thereof; an insert having an upper surface configured to mate with the upper portion's lower surface; a first channel in one of the upper portion and the insert and in fluid communication with an exterior of the one of the upper portion and the insert and with the upper recess when the upper portion and the insert are in contact with one another. A lower portion has a lower recess in an upper surface thereof, the upper surface configured to mate with the insert's lower surface. A second channel in one of the lower portion and the insert, the second channel is in fluid communication with an exterior of the one of the lower portion and the insert and the lower recess when the lower portion and the insert are in contact with one another.
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