GLASS PRODUCT FORMING APPARATUS Russian patent published in 2002 - IPC

FIELD: glass product manufacture. SUBSTANCE: apparatus has hollow punch into which refrigerant is supplied. Heat-exchanger of thermal siphon type is located in bottom part of punch cavity subjected to basic thermal loads. Heat-exchanger is made in the form of hollow tube with lower zone making 1/3 of its length and tightly fixed in bottom part of punch and upper zone making 1/3 of its length and equipped with fin. Vacuum-tight cavity of tube is filled with material capable of intensive vaporization at forming temperature. Alkali metals used separately or combination thereof may be used as intensively vaporizing material. EFFECT: uniform temperature distribution on forming surfaces of rigs, increased service life and improved quality of formed product. 2 cl, 1 dwg