Abstract: An organic solvent soluble resin and insoluble resin, and a ceramic powder or a metallic powder, if desired, a plasticizer and a desired additive are blended and molded and a molded product is treated with an organic solvent to dissolve the soluble resin, the plasticizer etc. and then, the treated product is fired to obtain a molded ceramic or metal having no cracking nor deformation and having high density.

Abstract: An apparatus is provided for automatically sealing insulation tubes comprising a turn table intermittently turned through a part of a revolution and having a plurality of tube holders disposed in a circle about its central axis, a friction wheel disposed below the turn table and engaging the tube holders for rotating them about their respective vertical axes, a mechanism for stopping the rotation of a predetermined number of the tube holders at predetermined positions along the path of revolution of the turn table, a device for heating the tubes at predetermined positions along the path of revolution of the turn table and a mechanism for supplying a molten solder to the holders being rotated about their axes at a predetermined position in the revolution of the turn table whereby the molten solder is distributed to the peripheral parts of the tube.