Production unit including a printing device and upper and lower sealed chambers
A printing device, a production unit and a production method of electronic parts suitable for production of precise electronic parts are provided. A squeegee is attached to a rotating machine, and is autorotated and self-driven, and moreover, a printing pressure is generated in the squeegee, and resin is strongly filled, thereby achieving a print having a precision-shape. Further, with a perforated plate as a boundary, upper and lower chambers are provided so as to control a pressure, thereby performing cutting and dispensing of the resin and achieving a print having a precision-shape. This method is applied to the packaging of electronic parts. A printing device E 1 comprises: a roller 3 allowing a peripheral surface 32 to approach one side 21 of a circuit board 2 ; moving means 4 for horizontally moving the roller 3 ; rotating means 5 for allowing the moving means 4 to rotate the roller 3 ; a squeegee 6 rotatably supported along the peripheral surface 32 of the roller 3 ; and printing pressure generating means 7 for pressing the squeegee 6 to the circuit board 2 by a rotating reactive force of the roller 3.
1. A production unit of electronic parts, comprising:
an upper part sealed chamber housing a printing device for pressing and filling a plastic material into a work piece having one side and a perforated plate having a through hole pattern overlaid on one side of said work piece and passable by said plastic material;
a lower part sealed chamber defined below said upper part sealed chamber with said perforated plate intervened between both said chambers and housing an alignment table, said alignment table positioning said work piece in a horizontal position with said one side directed upwardly, the height of said work piece being adjustable; and
differential pressure generating means for generating a differential pressure between said upper part sealed chamber and said lower part sealed chamber;
wherein said differential pressure generating means comprises:
a vacuum pump connected to said upper part sealed chamber and said lower part sealed chamber;
two leak valves connected to said upper part sealed chamber and said lower part sealed chamber, respectively; and
a stop valve opening and closing between said upper part sealed chamber and said lower part sealed chamber and said vacuum pump; and
wherein said vacuum pump vacuums said upper part sealed chamber and said lower part sealed chamber, and after printing, by combination of the operations of said two leak valves and the stop valve, the inflow of atmospheric air to said upper part sealed chamber and said lower part sealed chamber is individually allowed or sealed.