To achieve the above stated object, in the present invention, an alloy of low melting point is used as a filler with plasticity in the space between a die protecting member and the external wall of a seamless die cavity instead of mercury as used in {TAIL ~ the case} of {HEAD ~ the above mentioned prior art} 
To achieve the above stated object , in the present invention , an alloy of low melting point is used as a filler with plasticity in the space between a die protecting member and the external wall of a seamless die cavity instead of mercury as used in { TAIL ~ the case } of { HEAD ~ the above mentioned prior art }
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