HEATING DEVICE FOR MACHINES FOR THE TRANSFORMATION OF PLASTIC MATERIALS

摘要

The heating device for a machine for transforming plastic materials, comprises a heating body (39) disposed between two parallel rows (41, 42) of preforms (14). It is provided with at least two heating tubes (40) having bidirectional heating blades (54). These latter are inclined at an angle ( alpha ) such that a first of their faces emits heating radiation (55) in the direction of the adjacent row of preforms and such that the second surface emits its heating radiation (56) substantially in the direction of the free space between the two opposite rows of heating tubes toward the farthest row of preforms. Reflectors (60) are moreover arranged so as to reflect the heating radiation in a horizontal plane toward the preforms (14). The device thus permits obtaining very high energy efficiency whilst avoiding a harmful elevation of the temperature of the machine into which it is integrated.