| 摘要 |
A method of manufacturing a vent element having vent pores extending therethrough in parallel with the axial direction for use in die casting, rubber and plastic molding, metering and supplying of fluids, a ball-point pen and others. The method comprises winding one or more wire rods consisting of metal, ceramics or a compound material thereof having a melting point higher than that of a core rod in the form of a single or plural layer spirally around the core rod to form a secondary wire rod, heating the secondary wire rod or a bundle of a plurality of the secondary wire rods to a temperature which exceeds the melting point of the core rod but does not melt the wire rod so as to melt the core rod, whereby the melt is infiltrated into the interspaces between the wire rods and/or the windings of the wire rod to form one pore at every position where the core rod was.
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