PROCESS FOR PRODUCING ELECTRONIC CIRCUIT AND SYSTEM FOR PRODUCING ELECTRONIC CIRCUIT

摘要

Degree of freedom is enhanced in the feeding of a circuit board when electronic circuit components are mounted on the front surface and rear surface of the circuit board. Each of a plurality of mounting units (10) comprises a front conveyor (40), a rear conveyor (42), wiring board holders provided for respective conveyors (40, 42), a mounting head, a mounting head group mover, a component feeder, front a surface mounting program, and a rear surface mounting program. The rear conveyor (42) carries a printed circuit board (14) while directing its surface upward. The surface mounting program is selected and an electronic circuit component is mounted on the surface. Subsequently, the printed circuit board (14) is turned over and carried in the opposite direction on the front conveyor (40) while directing the rear surface upward. Then the rear surface mounting program is selected and an electronic circuit component is mounted on the rear surface. The electronic circuit component can be mounted regardless of whether the front surface is directed upward or the rear surface is directed upward by selecting the programs. Furthermore, printed circuit boards directing the front surface upward and printed wiring boards directing the rear surface upward can be fed in an arbitrary order on one conveyor.