| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an apparatus and a method of forming quartz glass by which the strain or the crack of quartz glass hardly occurs in the hot press forming and the manufacture of a mold is facilitated. <P>SOLUTION: The apparatus is provided with the mold 15 having a hollow part 21 in which the quartz glass is housed and comprising a material having larger coefficient of expansion than that of the quartz glass, a pressing part 23 and a heating means 13. The quartz glass in the hollow part 21 is pressed in the pressing part 23 while being heated by the heating means 13 to be formed into a prescribed shape. The mold 15 has a plurality of side plates 19 combined to be contact with each other and forming the side surface surroundings, an engaging means 16a, 24 and a spacer 30. The hollow part 21 is formed inside the side plates 19 and the spacer 30 and is constituted so that an engaging state is kept in the forming and the engaging state is released by the force in the outward direction which is loaded on the spacer 30 and the side plates 19 based on the difference of the coefficient of the expansion between the mold 15 and the quartz glass in the cooling after the forming and the side plates 19 and the spacer 30 are separated. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
