| 摘要 |
A stencil printer (10) for printing viscous material on a substrate (26) includes a frame (12), a stencil (16) coupled to the frame (12), and a print head (18), coupled for the frame (12), to deposit and print viscous material over the stenci (16). The stencil printer (10) further includes a substrate supporting and clamping assembly to support and clamp a substrate in a print position. The substrate supporting and clamping assembly (28) includes at least one support member to support the substrate in a print position, a pair of rail members (22, 24), coupled to the frame (12), adapted to engage opposite edges of the substrate (26), and a clamping mechanism (68), coupled to the frame, to move at least one of the rail members (22, 24) against the substrate (26) to clamp the substrate (26). The clamping mechanism (68) includes at least one piston to move the at least one of the rail members (22, 24) between a first position in which the rail member (22, 24) is spaced away from one of the opposite edges of the substrate (26) and a second position in which the rail member (22, 24) engages one of the opposite edges of the substrate (26) to clamp the substrate (26) between the rail members (22, 24) during a print operation. The clamping mechanism (68) further includes a pressure regulator (70) to control a clamping force applied by the piston to the rail member (22, 24) against the edge of the substrate (26). A method for supporting and clamping a substrate (26) in a print position is further disclosed. |
