HOLLOW STRUCTURE MOLDING MOLD

PROBLEM TO BE SOLVED: To provide a hollow structure molding mold capable of avoiding a crack of a green compact by cold isostatic processing. SOLUTION: A mold barrel part 1 wherein many holes 6 are bored from outside to inside and it can surround peripherally a powder layer 8 to be cold hydrostatic processed via a compressing thin film body 5 capable of being elastically deformed; mold cover parts 12, 13 which are installed to both end parts of the mold barrel part 1; a core 14 provided to an under side mold cover part 13 so that it can be immersed into a powder layer 8; and a boundary thin film body 15 covering the core 14 are provided. By using the cold hydrostatic processed body of the same composition as that of the powder layer 8 for the core 14, its elastic coefficient is made almost the same one as an elastic coefficient of green compact 9 after completion of cold hydrostatic processing or the green compact 8 just before completion, and a hydrostatic pressure P is allowed to act uniformly on each part of the powder layer 8.