LUFTABZUG UND VORPRESSVORRICHTUNG FÜR VERBUNDGLASSCHEIBEN

摘要

PCT No. PCT/FI92/00104 Sec. 371 Date Dec. 2, 1993 Sec. 102(e) Date Dec. 2, 1993 PCT Filed May 26, 1992 PCT Pub. No. WO92/22427 PCT Pub. Date Dec. 23, 1992.The invention relates to an air-exhausting and pre-pressing apparatus for laminated glass sheets. In the manufacture of laminated windscreens, the glass sheets are carried on a conveyor in a substantially upright position through a heating tunnel. The suction tubes included in a suction track adjacent to the conveyor are coupled with suction rings surrounding the edges of the laminated glass sheets. A preheating station, a heating station, and a recooling station are set successively to define together a heating tunnel, the conveyor extending through the heating tunnel. The preheating station and the recooling station are linked with each other by at least two air circulation ducts for circulating air from the recooling station to the preheating station and from the preheating station back to the recooling station. The arrangement saves heating energy and achieves a uniform heating and cooling of glass sheets.