APPARATUS FOR PRODUCING QUARTZ GLASS CRUCIBLE

摘要

PURPOSE:To provide a method for producing quartz crucible capable of improving the yield of pulling up an Si single crystal. CONSTITUTION:This apparatus is provided with a crucible supporting and rotating means 20 which supports the inside surface of the crucible 1 in the inverted state and rotates the crucible around its central axis at a low speed and is provided with a grinding wheel rotating and moving means 21 which moves the grinding wheel 16 having a prependicularly held revolving shaft along the outer side of the crucible 1 while rotating the grinding wheel 16 at a high speed. The grinding wheel 16 has a grinding surface which is rounded on, at least, the lower side so that the entire part of the outside surface of the crucible 1 is grounded by the grinding wheel 16.