| 主权项 |
1. A reflow soldering system which transports a printed circuit board on which a solder paste has been printed or coated to a sealable heating oven for reflow soldering, wherein
said heating oven is provided with a contact heating unit which has a transport rail which supports an outer edge part of said printed circuit board from below and a top heat transfer heater which supports an outer edge part of said printed circuit board from above, and with a hot gas blowing heating unit for heating inside of the printed circuit board, said transport rail contains heat transfer heaters embedded therein which heat the outer edge part of the printed circuit board, said transport rail or top heat transfer heater moves in an up-down direction after loading of said printed circuit board so that said transport rail and top heat transfer heater clamp and heat the outer edge part of said printed circuit board, and said transport rail comprises comprises:
an external frame member that is formed by a vertical direction fixed vertical outer frame, a horizontal direction fixed horizontal external frame rail, and a first moving horizontal rail and a second moving horizontal rail together forming horizontal moving frames; andintermediate vertical frames forming at least one intermediate vertical moving frame, and comprising a positioning stopper,said horizontal moving frames and said at least one intermediate vertical moving frame being configured to move depending on a size of the outer edge part and number of obtained boards of said printed circuit board, such that the transport rail is configured to handle different sizes of the outer edge part of the printed circuit board. |
