Metal mold for compression forming

Abstract

[Problem] To provide a metal mold for forming a preform decreasing the hitting of metal molds at a portion where a slide insert metal mold and a cavity metal mold undergo the sliding yet maintaining the pressure. [Means or Solution] The metal mold 33 for forming the preform includes a slide insert metal mold 36 split into at least two for forming at least a nozzle portion of the preform, wherein a pressure is maintained by using a fitting portion which includes a preform-forming portion of the slide insert metal mold 36 coupled together from the split state and a cavity metal mold 34. Auxiliary fitting portions 40a, 40b where the slide insert metal mold 36 and the cavity metal mold 34 undergo the sliding is formed at a position of not forming the preform separate from the fitting portion that includes the preform-forming portion.

Dependencies are inferred from the claim text.