摘要:
The invention relates to a tool for supporting multilayer printed circuit boards during manufacture comprising a frame in which there is fixed a pretensed, non-electrically conductive fabric which has a thickness less than 0.1 mm and can be accessed by its two faces. The present tool allows the induction bonding of the mentioned layers at internal points of the bundle following a method in which said bundle is placed on the tool of the invention and at least one of the welding electrodes used in the welding operation is applied on the lower face of a fabric of the tool supporting the bundle. A machine especially suitable for putting the method into practice comprises C-shaped magnetic cores the arms of which are long enough to reach the internal points of the bundle.
摘要:
Procedure for soldering the constituent layers of a multilayer printed circuit and machine for performing it. The procedure is applicable to circuits made up of layers containing the circuit image (2, 3, 4, 5,) that have perimetral strips (9) including reserve areas (11), superimposed and separated from each other by isolating layers (6, 7 and 8). The procedure includes the following steps: i) place a heater circuit (13) composed of a flat winding with at least one turn in short-circuit (14) in each reserve area (11); ii) superimpose the layers that contain the circuit image (2, 3, 4, 5,) and the isolating layers (6, 7 and 8) in alternating order; iii) secure the position of the layers relative to the others, thereby creating groups (12) of reserve areas (11); iv) place induction electrodes (18) over the groups (12) of reserve areas; v) soldering each one of the groups (12) by application of a magnetic field of variable induction.
摘要:
Process and machine for manufacturing printed circuit boards wherein a press packet comprised of at least two press plates of metal material between which is arranged a printed circuit board composition formed by one or more metal sheets, by one or more layers of insulating material impregnated with polymerizable resins and/or by one or more printed circuit boards with an engraved image of a circuit, are arranged between the press plates of a press and is pressed, subjecting said press packet to the action of a variable induction magnetic field which generates induced currents in each metal plate and sheet of the press packet, causing the heating of said plates and sheets, in turn causing the heating by thermal conduction of the layers of insulating material, melting and liquefying the resins in said layers of insulating material and adhering the insulating material to the metal sheets, so that, on raising the temperature even more, the polymerizable resins in the layers of insulating material are then polymerized, resulting, after the cooling of the press packet, in one or more rigid boards suitable for making printed electronic circuits. The machine to carry out the above process comprises a variable induction magnetic field generating device adapted to generate induced currents in the press packet's metal plates and sheets, causing them to heat, and means of controlling the operation of the magnetic field generating device and controlling the temperature and pressure to which the press packet is subjected.
摘要:
The machine (1) comprise at least one U-shaped magnetic circuit (2) provided with a field winding (3), comprising at the outer end of each arm of the magnetic circuit (2) one respective induction electrode (5s, 5i), both electrodes being perpendicularly arranged as regards the multi-layer printed circuit, coaxially to each other ans capable-of vertical movement in both directions. the end of each induction electrode (5s, 5i) that comes into contact with the multi-layer printed circuit is provided with a thermal barrier, in order to prevent, during the welding, heat transmission by thermal conductivity from the welding zone to the induction electrode (5s,5i).
摘要:
Process and machine for manufacturing printed circuit boards wherein a press packet comprised of at least two press plates of metal material between which is arranged a printed circuit board composition formed by one or more metal sheets, by one or more layers of insulating material impregnated with polymerizable resins and/or by one or more printed circuit boards with an engraved image of a circuit, are arranged between the press plates of a press and is pressed, subjecting said press packet to the action of a variable induction magnetic field which generates induced currents in each metal plate and sheet of the press packet, causing the heating of said plates and sheets, in turn causing the heating by thermal conduction of the layers of insulating material, melting and liquefying the resins in said layers of insulating material and adhering the insulating material to the metal sheets, so that, on raising the temperature even more, the polymerizable resins in the layers of insulating material are then polymerized, resulting, after the cooling of the press packet, in one or more rigid boards suitable for making printed electronic circuits. The machine to carry out the above process comprises a variable induction magnetic field generating device adapted to generate induced currents in the press packet's metal plates and sheets, causing them to heat, and means of controlling the operation of the magnetic field generating device and controlling the temperature and pressure to which the press packet is subjected.
摘要:
The invention relates to a tool for supporting multilayer printed circuit boards during manufacture comprising a frame in which there is fixed a pretensed, non-electrically conductive fabric which has a thickness less than 0.1 mm and can be accessed by its two faces. The present tool allows the induction bonding of the mentioned layers at internal points of the bundle following a method in which said bundle is placed on the tool of the invention and at least one of the welding electrodes used in the welding operation is applied on the lower face of a fabric of the tool supporting the bundle. A machine especially suitable for putting the method into practice comprises C-shaped magnetic cores the arms of which are long enough to reach the internal points of the bundle.
摘要:
The machine (1) comprise at least one U-shaped magnetic circuit (2) provided with a field winding (3), comprising at the outer end of each arm of the magnetic circuit (2) one respective induction electrode (5s, 5i), both electrodes being perpendicularly arranged as regards the multi-layer printed circuit, coaxially to each other ans capable-of vertical movement in both directions. the end of each induction electrode (5s, 5i) that comes into contact with the multi-layer printed circuit is provided with a thermal barrier, in order to prevent, during the welding, heat transmission by thermal conductivity from the welding zone to the induction electrode (5s,5i).
摘要:
The invention relates to a method of soldering the constituent layers of a multilayer printed circuit and the machine used for same. The inventive method can be used for circuits of the type consisting of layers having a circuit image (2, 3, 4, 5) which are provided with peripheral strips (9) comprising reserve areas (11), said circuit image layers being stacked and separated from one another by isolating layers (6, 7, 8). Said method comprises the following steps: i) providing a heating circuit (13) in each reserve area (11), said heating circuit consisting of at least one short circuited turn (14); ii) stacking the circuit image layers (2, 3, 4, 5) and the isolating layers (6, 7, 8) in an alternating manner; iii) fixing the position of the layers (2, 3, 4, 5, 6, 7, 8) in relation to one another, the reserve areas (11) forming groups (12) of reserve areas; iv) providing induction electrodes (18) which rest on the groups (12) of reserve areas; and v) soldering each of said groups (12) by applying a variable-induction magnetic field.