| 摘要 |
According to embodiments of the present invention, there is provided a preform (300, 400, 900) and a mold stack (600, 1000) for producing the preform (300, 400, 900). For example, there is provided a preform (300, 400, 900) suitable for subsequent blow-molding. The preform (300, 400, 900) comprises a neck portion (302, 402, 902); a gate portion (306, 406, 906); and a body portion (304, 404, 904) extending between said neck portion (302, 402, 902) and said gate portion (306, 406, 906); the gate portion (306, 406, 906) being associated with a substantially conical shape. In an example embodiment, the substantially conical shape is selected such that to substantially homogenize angle of refraction of rays (206) used during a re-heating stage of a blow-molding process.
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