A stencil printer is configured to print an assembly material on an electronic substrate. The stencil printer includes a frame, a stencil coupled to the frame, a support assembly coupled to the frame, and a print head gantry coupled to the frame. The print head gantry includes an elongate beam that rides along rails provided on the frame and a print head assembly supported by the print head gantry in such a manner that the print head assembly is configured to traverse the stencil during print strokes. The print head assembly includes a print head having a squeegee blade assembly configured to roll solder paste along the stencil. The stencil printer further includes a solder paste bead recovery system configured to remove a bead of solder paste from a top surface of the stencil and to deposit the bead of solder paste onto a new replacement stencil.

The present application relates to a stencil printing machine, which comprises a first holder device (110), a mobile device (121), two support tables (131, 132) and two driving devices (151, 152), wherein the first holder device (110) is configured to be able to horizontally reciprocate in the portrait orientation, the mobile device (121) is mounted on the first holder device (110) and is configured to be able to horizontally reciprocate in the landscape orientation on the first holder device (110), the two support tables (131, 132) are mounted at the lower end of the mobile device (121) and are used to bear corresponding solder paste jars (141, 142), the two driving devices (151, 152) are mounted on the mobile device (121) so that each of the two driving devices (151, 152) is located above a corresponding support table (131, 132) and is used to press a corresponding solder paste jar (141, 142), and the mobile device (121) is configured to be able to drive the two support tables (131, 132) and the two driving devices (151, 152) to reciprocate vertically. Two standard solder paste jars (141, 142) can be assembled for the stencil printing machine provided by the present application. When one solder paste jar (141, 142) is empty, solder paste supply is switched to the other solder paste jar (141, 142) and the stencil printing machine can continue to operate without stopping, thus improving the working efficiency of the stencil printing machine significantly.

The supply unit is used in a printing device including a printing head configured to perform printing process of a viscous fluid on a printing target using a screen mask, a collection section having a collection member configured to contact the screen mask to collect and move the viscous fluid and a collecting and moving section configured to move the collection member in a predetermined printing direction. The supply unit includes a supply section having a mounting section capable of mounting and dismounting a cartridge accommodating the viscous fluid, a driving section configured to move the supply section in the supply operation direction, a detection member, and a supply section detecting section configured to detect whether the supply section is positioned in a passage space where the collection section and the supply section do not contact each other by the position of the detection member.

A stencil printer is configured to print an assembly material on an electronic substrate. The stencil printer includes a frame, a stencil coupled to the frame, a support assembly coupled to the frame, and a print head gantry coupled to the frame. The print head gantry includes an elongate beam that rides along rails provided on the frame and a print head assembly supported by the print head gantry in such a manner that the print head assembly is configured to traverse the stencil during print strokes. The print head assembly includes a print head having a squeegee blade assembly configured to roll solder paste along the stencil. The stencil printer further includes a solder paste bead recovery system configured to remove a bead of solder paste from a top surface of the stencil and to deposit the bead of solder paste onto a new replacement stencil.

A screen printing apparatus includes a squeegee driver that lifts/lowers a first lifting/lowering shaft and a second lifting/lowering shaft; a link mechanism including a swinging member that pivots about a horizontal axis by lifting/lowering operations of the first lifting/lowering shaft and the second lifting/lowering shaft; a squeegee unit installed to the swinging member; and a controller that controls at least a height of the squeegee unit and an orientation of the squeegee unit in a rotating direction by controlling the squeegee driver.

A solder paste printer for which a pressing force of squeegee towards a stencil when spreading solder paste is smaller than a printing pressure when performing solder paste printing. The force with which the solder paste is pressed downwards by the squeegee is weak, and instead of solder paste being pressed down, it spreads along the squeegee. Also, the moving speed of the squeegee when spreading the solder paste is faster than the moving speed of the squeegee when printing solder paste. Thus, because the squeegee is moving fast, before the solder paste is pressed down sufficiently to be printed, the solder paste spreads out along the squeegee. Accordingly, it is possible to appropriately spread the solder paste along the direction in which the squeegee extends.

A screen printing device has a screen printing stencil. At least two doctor blade systems, each acting on the screen printing stencil are provided. The at least two doctor blade systems are arranged to each apply printing ink to an object to be printed in the same printing process. Each of the doctor blade systems has at least one doctor blade. Each of the doctor blades is arranged to sweep over the screen printing stencil. Each of the doctor blade systems is individually controlled by a control unit. The at least one doctor blade of each of the doctor blade systems is moved by a robot. At least respective two-dimensional motion paths of the doctor blades of each doctor blade system are each freely programmed and are established by control of the robot.

A screen printing apparatus includes a squeegee driver that lifts/lowers a first lifting/lowering shaft and a second lifting/lowering shaft; a link mechanism including a swinging member that pivots about a horizontal axis by lifting/lowering operations of the first lifting/lowering shaft and the second lifting/lowering shaft; a squeegee unit installed to the swinging member; and a controller that controls at least a height of the squeegee unit and an orientation of the squeegee unit in a rotating direction by controlling the squeegee driver.

A method for screen printing of a material on a substrate is provided. The method includes moving a process head assembly having at least one deposition device from a first position to a second position to perform a stroke, wherein the stroke includes at least a first phase for material processing of a material on a screen device using the at least one deposition device and a second phase for a material transfer from the screen device to the substrate. The at least one deposition device moves in a first direction in the first phase. At least one device moves in a second direction perpendicular to the first direction in the first phase. The at least one deposition device and the at least one device simultaneously move during at least a part of the first phase. The at least one device is selected from the group including the at least one deposition device, a material processing device, the screen device, and a substrate support.

A printing object surface has a cross-sectional shape curving along a printing advancing direction. The printing advancing direction is defined as a Y-axis, a direction orthogonal to the Y-axis and belonging to the cross-section is defined as a Z-axis, and a direction around an axis orthogonal to a Y-Z plane is defined as a -axis. A squeegee is disposed so as to be movable in the respective Y-, Z- and -axis directions. Information indicating a mutual relationship among respective Y-, Z- and -axis positions is obtained. The relationship is a relationship that enables performing printing while maintaining or substantially maintaining an angle formed by a direction tangent to a printing position in the printing object surface in the Y-Z plane and the squeegee. Printing is executed while the respective Y-, Z-, -axis positions of the squeegee relative to the printing object surface are controlled according to the obtained information.