KR-20260063773-A - PCB Clamp Jig For Screen Printer

Abstract

The present invention relates to a PCB clamp jig for a screen printer capable of stably fixing a carrier containing a PCB to the clamp jig. The PCB clamp jig for a screen printer according to the present invention comprises a base block disposed below the mask of the screen printer and a pneumatic pressurizing unit disposed on the side of the base block, wherein the base block is formed to allow a carrier containing a PCB to be seated on its upper surface and comprises a plurality of vertical suction holes formed penetrating inward from the upper surface, a horizontal suction hole formed penetrating outward from the lower end of the vertical suction holes to the side of the base block, a vacuum valve provided at the end of the horizontal suction hole, and a vacuum line connected to the vacuum valve. The pneumatic pressurizing unit comprises an air gun block disposed on both the left and right sides of the base block and spraying air while facing each other, and an air gun block cylinder disposed below the air gun block to transport the air gun block in the up and down directions.

Inventors

• 김종수

Assignees

• 주식회사 유비셀

Dates

Publication Date

20260507

Application Date

20241031

Claims (1)

1. It includes a base block (100) positioned below the mask (300) of the screen printer and a pneumatic pressurizing unit (200) positioned on the side of the base block (100). A base block (100) is formed so that a carrier (400) containing a PCB can be seated on its upper surface, and includes a plurality of vertical suction holes (110) formed penetrating inward from the upper surface, a horizontal suction hole (120) formed penetrating outward from the lower end of the vertical suction hole (110) to the side of the base block (100), a vacuum valve (130) provided at the end of the horizontal suction hole (120), and a vacuum line (140) connected to the vacuum valve (130). A PCB clamp jig for a screen printer, characterized in that the pneumatic pressurizing unit (200) includes an air gun block (210) positioned on both the left and right sides of the base block (100) and spraying air while facing each other, and an air gun block cylinder (220) positioned below the air gun block (210) and moving the air gun block (210) in the up and down directions.

Description

PCB Clamp Jig for Screen Printer The present invention relates to a screen printer that applies solder paste to a printed circuit PCB (hereinafter referred to as PCB) through a printing mask to form a predetermined circuit pattern on the PCB, and more specifically, to a PCB clamp jig for a screen printer that can stably fix a carrier containing a PCB to a clamp jig. A screen printer typically includes a conveyor for transporting the PCB, a PCB clamp jig having a support plate for supporting the PCB, a squeegee that supplies the coating liquid from the mask surface to the PCB through the opening of the mask, an alignment vision system for verifying the positions of the PCB and the mask, and a cleaner for cleaning the opening of the mask. The screen printer of the above configuration operates by loading a PCB transported via a conveyor into a clamp unit, then aligning the positions of the PCB and the mask by adjusting the position of the clamp jig after verifying the position of the recognition mark on the PCB and the position of the recognition mark on the mask using alignment vision, and then pressing the mask and the PCB together and moving a squeegee to apply the coating liquid from the mask surface to the PCB. Conveyors are provided on both sides of the support plate to support both ends of the PCB. Therefore, when the PCB is placed on the clamp jig, both ends of the PCB protrude from the support plate. At this time, the side clamps extended in the direction of extension of the support plate can press the sides of the PCB to fix the PCB. However, there is a problem in that the side of the PCB is not parallel, or in the case of an FPCB (flexible PCB), the position of the PCB is not fixed even when the side clamps press the sides of the PCB. Considering the aforementioned problems, Registered Utility Model Publication No. 20-0200250 is disclosed, but since the method involves pressing and fixing the PCB by providing a pressing cylinder and a piston on the upper part of the PCB, the problem of the PCB being damaged occurs. In addition, in the case of small FPCBs currently widely used, the screen printing process is performed while the FPCB is placed on a clamping jig while stored in a transport carrier, but in this state, it is difficult to generate fixing force using a side pressure method or a pressing piston method. FIG. 1 is an exemplary diagram showing the overall configuration of the present invention. FIG. 2 is an exemplary diagram showing the operating state of the present invention. FIG. 3 is an exemplary diagram showing the operating state of the present invention. The specific details regarding the means for solving the problem according to the present invention are described in detail below together with the attached drawings. However, the attached drawings may be exaggerated, omitted, or schematically illustrated for the convenience of explaining the essential parts, and terms and names used in the description may be implicitly determined by the shape, function, or role of the components rather than their dictionary meanings. Descriptions regarding direction are determined based on the direction first presented in the first drawing, and descriptions regarding position are determined as inside or outside based on the center of each component or the center of a circle. Furthermore, specific descriptions regarding prior art and ordinary technology are omitted or replaced with simple symbols or names as they may obscure the essence. In addition, specific structures, shapes, forms, placements, sizes, etc. of the configuration identifiable through the drawings, and the operation of the configuration and the resulting effects, etc., which can be inferred from the drawings, may obscure the essence and may be omitted from detailed descriptions; bolts, welds, holes, etc., applied through the combination of configurations may obscure the essence and may be omitted from the drawings; and some components may be exaggerated, simplified, or omitted to aid in understanding the present invention. FIG. 1 is an exemplary diagram showing the overall configuration of the present invention, FIG. 2 is an exemplary diagram showing the operating state of the present invention, and FIG. 3 is an exemplary diagram showing the operating state of the present invention. In FIG. 1 to FIG. 3, the base block (100) is shown in cross-section to aid in understanding the drawings. Referring to FIGS. 1 to 3, the PCB clamp jig for a screen printer according to the present invention includes a base block (100) disposed below the mask (300) of the screen printer and pneumatic pressurizing parts (200) disposed on both sides of the base block (100). The base block (100) is formed so that a carrier (400) containing a PCB (not shown) can be seated on its upper surface, and includes a plurality of vertical suction holes (110) formed penetrating inward from the upper surface, a horizontal suction hole (120) formed penetrating outward from th