Equipment to surface PCB with film(s) - has conveyors to feed to and discharge from vacuum chamber contg. 2 endless belts with devices to apply heat and pressure

摘要

A PCB is covered with a film on one or both sides in a vacuum chamber. In the appts. used two continuous belts move together in the vacuum chamber to form the laminating gap between them and a heater acts on the laminate. A prefabricated PCB (12) is moved (8) together with its covering film(s) into the vacuum chamber (2) where the two conveyor belts (6,7) produce the laminating gap (18) between them. Between the two belts (6,7) there is a heater (10) and pressure ram (13) on each side. In operation the laminate is moved into position before the inlet and outlet (3,4) are closed and the vacuum is produced. The film(s) is hot pressed on to the PCB either by admitting atmospheric pressure or even higher pressure to the rams (13). The surfaced PCB is moved out of the chamber by opening its inlet/outlet (3,4) and activating the conveyor table (15). A pair of pressure rollers (16) can also be used in addn. e.g. to apply a further surfacing. The heating in the vacuum chamber (2) can alternatively be by h/f. ADVANTAGE - The equipment eliminates the formation of scrap material (unlike existing appts. for this purpose). It produces high grade laminates at a high output rate.