| 摘要 |
A mold comprises a first molding plate and a second molding plate. A wedge-shaped mold cavity and an entrance connecting to the wedge-shaped mold cavity are defined in the second molding plate. The wedge-shaped mold cavity comprises a pouring end surface, a first side end surface and a second side end surface connecting to two ends of the pouring end surface respectively. The entrance comprises a first sidewall adjacent to the first side end surface, and a second sidewall slantingly opposite to the second side end surface.
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