Abstract: A screen printing device and screen printing method in which, in screen printing which is to be applied to a cavity circuit board configured by bonding board members together, printing misalignment hardly occurs. A mask member has a cavity-portion corresponding mask region MRC where a mask pattern MPC corresponding to cavity-portion electrode patterns is formed on the bottom faces of fitting portions to be fitted into cavity portions CV; and a flat-portion corresponding mask region MRF where a mask pattern MPF corresponding to flat-portion electrode patterns is formed as separate regions. Positioning between the cavity-portion corresponding mask region MRC and the cavity-portion electrode patterns is performed, and screen printing is applied. Positioning between the flat-portion corresponding mask region MRF and the flat-portion electrode patterns is performed, and screen printing is applied.

Abstract: The present invention provides a screen printing apparatus and screen printing method which, in screen printing that is to be performed on the upper surface of a circuit board, and the bottom surfaces of recess openings in the upper surface, can efficiently perform a printing work while ensuring an excellent printing quality. In a screen printing apparatus which prints a paste for bonding an electronic component on an upper surface and a bottom-surface of a recess, a printing apparatus 2(1) and a printing apparatus 2(2) which sequentially 10 print the paste in two steps on the circuit board are placed in series. The printing apparatus 2(1) on the upstream side includes a bottom-surface printing mask which is provided in correspondence with the bottom surface of the recess, and a closed squeegee mechanism 36A which butts against and slides over an upper surface of the bottom-surface printing mask to 15 pressurize and supply the paste.

Abstract: It is an object to provide a screen printing device and screen printing method in which, in screen printing which is to be applied to a cavity circuit board configured by bonding board members together, printing misalignment hardly occurs. A mask member 33 has a cavity-portion corresponding mask region MRC where a mask pattern MPC corresponding to cavity-portion electrode patterns 11dp is formed on the bottom faces of fitting portions 33a to be fitted into cavity portions CV; and a flat-portion corresponding mask region MRF where a mask pattern MPF corresponding to flat-portion electrode patterns 12dp is formed as separate regions. Positioning between the cavity-portion corresponding mask region MRC and the cavity-portion electrode patterns 11dp is performed, and screen printing is applied. Positioning between the flat-portion corresponding mask region MRF and the flat-portion electrode patterns 12dp is performed, and screen printing is applied.

Abstract: The present invention provides a screen printing apparatus and screen printing method which, in screen printing that is to be performed on the upper surface of a circuit board, and the bottom surfaces of recess openings in the upper surface, can efficiently perform a printing work while ensuring an excellent printing quality. In a screen printing apparatus which prints a paste for bonding an electronic component on an upper surface and a bottom-surface of a recess, a printing apparatus 2(1) and a printing apparatus 2(2) which sequentially print the paste in two steps on the circuit board are placed in series. The printing apparatus 2(1) on the upstream side includes a bottom-surface printing mask which is provided in correspondence with the bottom surface of the recess, and a closed squeegee mechanism 36A which butts against and slides over an upper surface of the bottom-surface printing mask to pressurize and supply the paste.

Abstract: There is intended provision of a screen print mask cleaning unit that enables efficient wiping of paste from a screen print mask conforming to a cavity substrate, a screen printing machine, and a screen print mask cleaning method. A rubbing area 34a of a paper member 34 is rubbed against an undersurface of a mask region for a flat area (MRF), thereby wiping out paste PT adhering to the undersurface of the MRF. The rubbing area 34a of the paper member 34 is sequentially rubbed against undersurfaces of respective protruding portions 3a in a mask area for cavities (MRC), thereby wiping out the paste PT adhering to the undersurfaces of the respective protruding portions 3a.

Abstract: It is an objective to provide a screen printer capable of properly cleaning a three dimensional mask member intended for a cavity substrate and a method for cleaning the screen printer. A mask member 33 includes, as separate areas, a cavity portion correspondence mask area MRC in which a mask pattern MPC corresponding to cavity portion electrode patterns 11dp are formed on bottom surfaces of fitting portions 33a to be fitted into cavity portions CV and a flat portion correspondence mask area MRF in which a mask pattern MPF corresponding to flat portion electrode patterns 12dp is formed. A cleaning unit 37 comes into contact with lower surfaces of the fitting portions 33a within the cavity portion correspondence mask area MRC, to thus clean the cavity portion correspondence mask area MRC and also comes into contact with a lower surface of the flat portion correspondence mask area MRF, to thus clean the flat portion correspondence mask area MRF.

Abstract: A vehicle body structure comprising: first and second members each having a hat-shaped cross section including a main wall, first and second side walls extending from the main wall; an opposing area in which the opening, first side wall and second side wall of the first member are opposed to and jointed to the opening, first side wall and second side wall of the second member, respectively, with a joint surface defined therebetween; and a non-opposing area in which one of the first and second members is shifted parallel to the joint surface, so that the first side wall of the first member is opposed to and jointed to the second side wall of the second member.

Abstract: A cleaning device for a screen printing mask includes a paper member for rubbing a lower surface of a mask and a backup member for pressing the paper member against the lower surface of the mask via elastic members attached to an upper end portion thereof. As the backup member with the paper member pressed against the lower surface of the mask via the elastic members is relatively moved with respect to the mask, the paper member is served for rubbing the lower surface of the mask to thereby effect the wiping off of paste adhering to the lower surface of the mask.

Abstract: A vehicle body structure comprising: first and second members each having a hat-shaped cross section including a main wall, first and second side walls extending from the main wall; an opposing area in which the opening, first side wall and second side wall of the first member are opposed to and jointed to the opening, first side wall and second side wall of the second member, respectively, with a joint surface defined therebetween; and a non-opposing area in which one of the first and second members is shifted parallel to the joint surface, so that the first side wall of the first member is opposed to and jointed to the second side wall of the second member.

Abstract: A cream solder cartridge used in a screen printing apparatus which prints cream solder on a board through pattern holes by sliding, on a mask plate, a closed squeegee that is stored with cream solder inside is composed of a long and narrow concave portion made of a flexible film-like material, a brim portion projecting from the outer periphery of the concave portion, and a film-like cover sheet that is stuck to the brim portion and thereby closes the opening of the concave portion. This configuration makes it possible to supply paste at a low cost and to perform a viscosity adjustment easily by externally stirring the paste accommodated inside.

Abstract: It is possible to obtain a screen printing method that may assure excellent printing qualities since the screen printing method of the present invention includes: (A) sliding a squeegee head with paste stored in the squeegee head on a mask plate, while the past is pressurized, and printing the paste on a substrate through pattern holes of the mask plate, (B) at least one step of (b) separating the squeegee head with the paste stored therein from the mask plate, and (e) sliding the squeegee head on the mask plate for a pre-squeezing purpose before the step (A). The step of separating the squeegee head from the mask plate includes the steps of (1) discontinuing the pressure application to the paste stored in the squeegee head, (2) horizontally moving the squeegee head by a predetermined distance while the bottom end portion of the squeegee head is abutted on the mask plate in a state of the pressure application being discontinued, and (3) moving the squeegee head upward off from the mask plate.

Abstract: A screen printing method and apparatus are capable of maintaining a constant attack angle between a squeegee and a mask plate, regardless of the surface condition of the mask plate. A squeegee head, including a pair of squeegees, is rotatably supported by a retainer with respect to a horizontal axis that is at a right angle to a squeegeeing direction. The rotatably supported squeegee head is pushed by a cylinder against the mask plate. Accordingly, the attack angle is kept constant to improve the printing quality even if a substrate has a curved portion.

Abstract: A screen printing apparatus in which a squeegee head 13 is moved on a mask plate 12 thereby to print paste on a substrate through pattern holes 12a, slide contact portions 37A and 37B form respectively front and rear walls in the squeegeeing direction of a printing space 35 which reserves cream solder 5 therein and makes the cream solder contact with the surface of the mask plate 12 through an opening portion formed at the lower surface thereof. Each of the slide-contact portions is configured by a partition plate 39 for partitioning between the printing space 35 and the outside and a filling block 38 having a filling surface 38a which forms an acute angle with respect to the surface of the mask plate 12. In the squeegeeing operation, the filling surface 38a rolls the cream solder 5. Thus, the cream solder 5 can be filled into the pattern holes 12a without pressurizing the cream solder, and a problem caused by the leakage of the cream solder can be eliminated.

Abstract: A cream solder cartridge used in a screen printing apparatus which prints cream solder on a board through pattern holes by sliding, on a mask plate, a closed squeegee that is stored with cream solder inside is composed of a long and narrow concave portion made of a flexible film-like material, a brim portion projecting from the outer periphery of the concave portion, and a film-like cover sheet that is stuck to the brim portion and thereby closes the opening of the concave portion. This configuration makes it possible to supply paste at a low cost and to perform a viscosity adjustment easily by externally stirring the paste accommodated inside.

Abstract: A screen printing method and apparatus for applying paste into pattern apertures of a mask plate by sliding a filling member provided at a lower end of a squeegee head. The filling member forms an acute angle with an upper surface of the mask plate. Any extra paste on the mask plate is wiped by sliding a wiper provided at a lower end of the squeegee head. The wiper forms an obtuse angle with the upper surface of the mask plate.

Abstract: It is possible to obtain a screen printing method that may assure excellent printing qualities since the screen printing method of the present invention includes: (A) sliding a squeegee head with paste stored in the squeegee head on a mask plate, while the past is pressurized, and printing the paste on a substrate through pattern holes of the mask plate, (B) at least one step of (b) separating the squeegee head with the paste stored therein from the mask plate, and (e) sliding the squeegee head on the mask plate for a pre-squeezing purpose before the step (A). The step of separating the squeegee head from the mask plate includes the steps of (1) discontinuing the pressure application to the paste stored in the squeegee head, (2) horizontally moving the squeegee head by a predetermined distance while the bottom end portion of the squeegee head is abutted on the mask plate in a state of the pressure application being discontinued, and (3) moving the squeegee head upward off from the mask plate.

Abstract: A screen printing apparatus in which a squeegee head 13 is moved on a mask plate 12 thereby to print paste on a substrate through pattern holes 12a, slide contact portions 37A and 37B form respectively front and rear walls in the squeegeeing direction of a printing space 35 which reserves cream solder 5 therein and makes the cream solder contact with the surface of the mask plate 12 through an opening portion formed at the lower surface thereof. Each of the slide-contact portions is configured by a partition plate 39 for partitioning between the printing space 35 and the outside and a filling block 38 having a filling surface 38a which forms an acute angle with respect to the surface of the mask plate 12. In the squeegeeing operation, the filling surface 38a rolls the cream solder 5. Thus, the cream solder 5 can be filled into the pattern holes 12a without pressurizing the cream solder, and a problem caused by the leakage of the cream solder can be eliminated.

Abstract: It is possible to obtain a screen printing method that may assure excellent printing qualities since the screen printing method of the present invention includes: (A) sliding a squeegee head with paste stored in the squeegee head on a mask plate, while the past is pressurized, and printing the paste on a substrate through pattern holes of the mask plate, (B) at least one step of (b) separating the squeegee head with the paste stored therein from the mask plate, and (e) sliding the squeegee head on the mask plate for a pre-squeezing purpose before the step (A). The step of separating the squeegee head from the mask plate includes the steps of (1) discontinuing the pressure application to the paste stored in the squeegee head, (2) horizontally moving the squeegee head by a predetermined distance while the bottom end portion of the squeegee head is abutted on the mask plate in a state of the pressure application being discontinued, and (3) moving the squeegee head upward off from the mask plate.

Abstract: A screen printing method and apparatus for applying paste into pattern apertures of a mask plate by sliding a filling member provided at a lower end of a squeegee head. The filling member forms an acute angle with an upper surface of the mask plate. Any extra paste on the mask plate is wiped by sliding a wiper provided at a lower end of the squeegee head. The wiper forms an obtuse angle with the upper surface of the mask plate.

Abstract: A screen printing method and apparatus are capable of maintaining a constant attack angle between a squeegee and a mask plate, regardless of the surface condition of the mask plate. A squeegee head, including a pair of squeegees, is rotatably supported by a retainer with respect to a horizontal axis that is at a right angle to a squeegeeing direction. The rotatably supported squeegee head is pushed by a cylinder against the mask plate. Accordingly, the attack angle is kept constant to improve the printing quality even if a substrate has a curved portion.