METHOD FOR MANUFACTURING MOLD-BLOWN GLASS PRODUCT HAVING ENGRAVED PATTERN AT BOTTOM

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing mold-blown glass products having engraved patterns at bottoms, which is capable of forming the bright engraved patterns without center misalignment. SOLUTION: The method for manufacturing the mold-blown glass products having the engraved patterns at the bottoms by mold-blowing a parison P formed by a rough mold within a blow mold comprises press forming the parison P by the rough mold not having engraving at the bottom, then transferring the parison P to the blow mold consisting of a mold 1a and a bottom plate 1b, formed with the engraved patterns 2, sucking the parison P from the lower part of the bottom plate within the blow mold and mold-blowing the parison P by rotating the bottom plate 1b in follow-up to the rotation of the parson P thereby forming the engraved patterns at the bottom with the bottom plate 1b.