DBC board double-sided printing tool and DBC board double-sided printing process

Abstract

The present invention relates to the field of printing technology, and discloses a double-sided printing tool for a DBC board and a double-sided printing process for a DBC board. The DBC board printing tool comprises a first positioning plate, a second positioning plate, a first negative pressure source, and a second negative pressure source. The first end of the first positioning plate is provided with a first cavity, and the second end of the first positioning plate is provided with a plurality of first positioning grooves, and the first positioning groove is provided with a first vertical through hole, and the first vertical through hole is connected to the first cavity; the first end of the second positioning plate is provided with a second cavity, and the second end of the second positioning plate is provided with a plurality of second positioning grooves, and the second positioning groove is provided with a receiving groove, and the receiving groove is provided with a second vertical through hole, and the second vertical through hole is connected to the second cavity, and the second positioning plate can be buckled on the first positioning plate. The printing process adopts the printing tool, which can effectively fix the DBC board, effectively prevent the DBC board from being adhered to the steel net by solder paste, and improve the quality and efficiency of printing.

Description

Technical Field

[0001] The invention relates to the technical field of printing, and in particular to a double-sided printing tool for a DBC board and a double-sided printing process for a DBC board. Background Art

[0002] When printing solder paste on a PCB or DBC board, a steel mesh needs to be laid on the PCB or DBC board, and the printing head moves horizontally on the steel mesh, so that the solder paste is printed on the PCB or DBC board from the mesh holes of the steel mesh. Traditional PCB or DBC boards are relatively large in size and heavy in weight, so the solder paste will not stick to the steel mesh. However, for smaller DBC boards, due to their small size, light weight, and large printing area, the solder paste is easily stuck to the steel mesh and is difficult to remove, resulting in inaccurate printed circuit graphics and uneven solder paste thickness, which affects the quality of printing and sometimes even makes the DBC board unusable. Summary of the invention

[0003] The purpose of the present invention is to provide a double-sided printing tool for a DBC board, which can effectively fix the DBC board and prevent the DBC board from being stuck to the steel mesh during the printing process, so as to improve the quality of the printed DBC board.

[0004] The present invention also provides a double-sided printing process for a DBC board, which can print the DBC board on both sides and improve the efficiency of printing the DBC board.

[0005] According to an embodiment of the present invention, a DBC board double-sided printing tool includes: a first positioning plate, a first cavity is formed at the first end of the first positioning plate, a plurality of first positioning grooves are formed at the second end of the first positioning plate, each of the first positioning grooves is formed with a first vertical through hole, and the first vertical through hole is connected to the first cavity; a second positioning plate, a second cavity is formed at the first end of the second positioning plate, a plurality of second positioning grooves are formed at the second end of the second positioning plate, a receiving groove is formed in the second positioning groove, a second vertical through hole is formed in the receiving groove, the second vertical through hole is connected to the second cavity, and the second positioning plate can be buckled on the first positioning plate; a first negative pressure source, the first negative pressure source is connected to the first cavity through a first exhaust pipe; a second negative pressure source, the second negative pressure source is connected to the second cavity through a second exhaust pipe.

[0006] A double-sided printing tool for a DBC board according to an embodiment of the present invention has at least the following beneficial effects: when printing solder paste on a DBC board, first install the DBC board in the first positioning groove of the first positioning plate, the first positioning groove can position the DBC board, and then install the first positioning plate on the printing press, at this time, the second end of the first positioning plate faces upward, and the first side of the DBC board also faces upward, and the first negative pressure source is turned on, and the first negative pressure source extracts the air in the first cavity through the first exhaust pipe, so that the second side of the DBC board is adsorbed in the first positioning groove, and when the printing head prints solder paste on the first side of the DBC board, the DBC will not be adhered to the steel mesh by the solder paste, thereby ensuring the printing quality of the first side of the DBC board; after printing the first side, turn off the first negative pressure source, remove the first positioning plate, and buckle the second positioning plate on the first positioning plate, when buckling, the first The second end of the positioning plate faces upward, and the second end of the second positioning plate faces downward, so that the second positioning groove is aligned with the first positioning groove; then the first positioning plate and the second positioning plate are flipped over so that the second positioning plate is located at the bottom, at this time the second end of the first positioning plate faces downward, and the second end of the second positioning plate faces upward, the first positioning plate is removed, the DBC board is transferred to the second positioning groove of the second positioning plate, and the solder paste that has been printed on the first side of the DBC board is located in the receiving groove, and the second side of the DBC board faces upward; the second positioning plate is installed on the printing machine, and the second negative pressure source is turned on. The second negative pressure source extracts the air in the second cavity through the second exhaust pipe, so that the first side of the DBC board is adsorbed in the second positioning groove. When the printing head prints solder paste on the second side of the DBC board, the DBC board will not be stuck to the steel mesh. After printing is completed, the second negative pressure source is turned off, and the DBC board can be removed. The tooling has a simple structure and is easy to operate. It can effectively fix the DBC board and effectively prevent the DBC board from being stuck to the steel mesh by solder paste, thereby ensuring the accuracy of the printed circuit graphics and improving the quality of printing.

[0007] According to some embodiments of the present invention, the four corners of the first positioning groove are all provided with first rounded corners, and the four corners of the second positioning groove are all provided with second rounded corners, so as to smoothly position and install the DBC board in the first positioning groove and the second positioning groove.

[0008] According to some embodiments of the present invention, a first positioning hole is formed at the first end of the first positioning plate, and a second positioning hole is formed at the first end of the second positioning plate, so that the printer can recognize the first positioning hole and the second positioning hole, thereby adjusting the position between the steel mesh and the DBC plate.

[0009] According to some embodiments of the present invention, a first horizontal through hole is provided on the side of the first positioning plate, one end of the first air extraction pipe is connected to the first negative pressure source, and the other end of the first air extraction pipe is connected to the first horizontal through hole. When the first negative pressure source is turned on, the first air extraction pipe extracts the air in the first cavity through the first horizontal through hole, so that the DBC board is adsorbed in the first positioning groove.

[0010] According to some embodiments of the present invention, a second horizontal through hole is provided on the side of the second positioning plate, one end of the second air extraction pipe is connected to the second negative pressure source, and the other end of the second air extraction pipe is connected to the second horizontal through hole. When the second negative pressure source is turned on, the second air extraction pipe extracts the air in the second cavity through the second horizontal through hole, so that the DBC board is adsorbed in the second positioning groove.

[0011] According to an embodiment of the present invention, a double-sided printing process for a DBC board adopts the above-mentioned double-sided printing tool for the DBC board, including the following steps: step 1, providing a DBC board and a first positioning plate, the first positioning plate is provided with a first positioning hole, and the DBC board is placed in the first positioning groove of the first positioning plate; step 2, starting the first negative pressure source to extract the air in the first cavity so that the DBC board is adsorbed in the first positioning groove; step 3, fixing the first positioning plate on a printing press, the printing press identifies the position of the first positioning hole on the first positioning plate, and adjusts the relative position between the steel mesh and the DBC board; step 4, applying solder paste on the steel mesh, and pressing the steel mesh downward to print the solder paste on the first side of the DBC board; step 5, providing a second positioning plate, the second positioning hole A second positioning hole is provided on the plate. The first positioning plate is removed from the printing press, and the second positioning plate is fastened on the first positioning plate. The first positioning plate and the second positioning plate are flipped over so that the first positioning plate is located above the second positioning plate. Step six: close the first negative pressure source, open the second negative pressure source, so that the DBC board is adsorbed in the second positioning groove of the second positioning plate, and the printed solder paste is located in the receiving groove, and the first positioning plate is removed. Step seven: fix the second positioning plate on the printing press, the printing press identifies the position of the second positioning hole on the second positioning plate, and automatically adjusts the relative position between the steel mesh and the DBC board. Step eight: press the steel mesh down to print the solder paste on the second side of the DBC board. Step nine: disassemble the second positioning plate and remove the DBC board.

[0012] A double-sided printing process for a DBC board according to an embodiment of the present invention has at least the following beneficial effects: this printing process, which adopts the above-mentioned printing tooling, can perform double-sided printing on the DBC board, can effectively prevent the DBC board from being stuck to the steel mesh by the solder paste, will not damage the printed solder paste, ensures the accuracy of the printed circuit graphics, can improve the printing quality, and can improve the printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the first positioning plate in an embodiment of the present invention;

[0014] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0015] Figure 3is a schematic structural diagram of a second positioning plate in an embodiment of the present invention;

[0016] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0017] Figure 5 A diagram showing the matching relationship between the first positioning plate and the second positioning plate in an embodiment of the present invention;

[0018] Figure 6 A cross-sectional view showing the matching relationship between the first positioning plate and the second positioning plate in an embodiment of the present invention;

[0019] Figure 7 for Figure 6 A partial enlarged view of point C in the middle.

[0020] In the accompanying drawings: 100 first positioning plate, 110 first cavity, 120 first positioning groove, 130 first vertical through hole, 140 first chamfered corner, 150 first positioning hole, 160 first horizontal through hole, 200 second positioning plate, 210 second cavity, 220 second positioning groove, 230 accommodating groove, 240 second vertical through hole, 250 second chamfered corner, 260 second positioning hole, 270 second horizontal through hole, 300 DBC board, 400 solder paste. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Reference Figures 1 to 7 The embodiment of the present invention provides a DBC board double-sided printing tool, including a first positioning plate 100, a second positioning plate 200, a first negative pressure source and a second negative pressure source. The first end of the first positioning plate 100 is provided with a first cavity 110, and the second end of the first positioning plate 100 is provided with a plurality of first positioning grooves 120, each of the first positioning grooves 120 is provided with a first vertical through hole 130, and the first vertical through hole 130 is connected to the first cavity 110; the first end of the second positioning plate 200 is provided with a second cavity 210, and the second end of the second positioning plate 200 is provided with a plurality of second positioning grooves 220, and the second positioning groove 220 is provided with a receiving groove 230, and the receiving groove 230 is provided with a second vertical through hole 240, and the second vertical through hole 240 is connected to the second cavity 210, and the second positioning plate 200 can be buckled on the first positioning plate 100; the first negative pressure source is connected to the first cavity 110 through the first exhaust pipe; the second negative pressure source is connected to the second cavity 210 through the second exhaust pipe.

[0026] When printing solder paste 400 on the DBC board 300, first install the DBC board 300 in the first positioning groove 120 of the first positioning plate 100. The first positioning groove 120 can position the DBC board 300. Then install the first positioning plate 100 on the printing press. At this time, the second end of the first positioning plate 100 faces upward, and the first side of the DBC board 300 also faces upward. Turn on the first negative pressure source, and the first negative pressure source draws away the air in the first cavity 110 through the first exhaust pipe, so that the second side of the DBC board 300 is adsorbed in the first positioning groove 120. When the printing head prints solder paste 400 on the first side of the DBC board 300, the DBC will not be stuck to the steel mesh by the solder paste 400, thereby ensuring the printing quality of the first side of the DBC board 300.

[0027] After printing the first side, turn off the first negative pressure source, remove the first positioning plate 100, and snap the second positioning plate 200 onto the first positioning plate 100. When snapping, the second end of the first positioning plate 100 faces upward, and the second end of the second positioning plate 200 faces downward, so that the second positioning groove 220 is aligned with the first positioning groove 120; then flip the first positioning plate 100 and the second positioning plate 200 so that the second positioning plate 200 is located at the bottom. At this time, the second end of the first positioning plate 100 faces downward, and the second end of the second positioning plate 200 faces upward. Remove the first positioning plate 100, and the DBC board 300 is transferred to the second positioning groove 220 of the second positioning plate 200, and the solder paste 400 that has been printed on the first side of the DBC board 300 is located in the receiving groove 230, and the second side of the DBC board 300 faces upward.

[0028] The second positioning plate 200 is mounted on the printer, and the second negative pressure source is turned on. The second negative pressure source draws out the air in the second cavity 210 through the second exhaust pipe, so that the first surface of the DBC board 300 is adsorbed in the second positioning groove 220. When the printing head prints the solder paste 400 on the second surface of the DBC board 300, the DBC board 300 will not be adhered to the steel mesh. After the printing is completed, the second negative pressure source is turned off, and the DBC board 300 can be removed. The tooling has a simple structure and is easy to operate. It can effectively fix the DBC board 300, effectively prevent the DBC board 300 from being adhered to the steel mesh by the solder paste 400, ensure the accuracy of the printed circuit pattern, and improve the quality of printing.

[0029] Reference Figures 1 to 4 In some embodiments, the four corners of the first positioning groove 120 are provided with first rounded corners 140, and the four corners of the second positioning groove 220 are provided with second rounded corners 250. This facilitates the smooth positioning and installation of the DBC board 300 in the first positioning groove 120 and the second positioning groove 220. In some embodiments, the first end of the first positioning plate 100 is provided with a first positioning hole 150, and the first end of the second positioning plate 200 is provided with a second positioning hole 260. This facilitates the printer to identify the first positioning hole 150 and the second positioning hole 260, thereby adjusting the position between the steel mesh and the DBC board 300.

[0030] Reference Figure 1 In some embodiments, a first horizontal through hole 160 is provided on the side of the first positioning plate 100, one end of the first air extraction pipe is connected to the first negative pressure source, and the other end of the first air extraction pipe is connected to the first horizontal through hole 160. When the first negative pressure source is turned on, the first air extraction pipe extracts the air in the first cavity 110 through the first horizontal through hole 160, so that the DBC board 300 is adsorbed in the first positioning groove 120. Figure 3In some embodiments, a second horizontal through hole 270 is provided on the side of the second positioning plate 200, one end of the second air extraction pipe is connected to the second negative pressure source, and the other end of the second air extraction pipe is connected to the second horizontal through hole 270. When the second negative pressure source is turned on, the second air extraction pipe extracts the air in the second cavity 210 through the second horizontal through hole 270, so that the DBC board 300 is adsorbed in the second positioning groove 220.

[0031] The embodiment of the present invention further provides a DBC board double-sided printing process, using the above-mentioned DBC board double-sided printing tool, comprising the following steps:

[0032] Step 1: Provide a DBC board 300 and a first positioning board 100. The first positioning board 100 is provided with a first positioning hole 150. Place the DBC board 300 in the first positioning groove 120 of the first positioning board 100.

[0033] Step 2: Start the first negative pressure source to extract the air in the first cavity 110 so that the DBC board 300 is adsorbed in the first positioning groove 120;

[0034] Step 3: fix the first positioning plate 100 on the printing machine, the printing machine identifies the position of the first positioning hole 150 on the first positioning plate 100, and adjusts the relative position between the steel mesh and the DBC plate 300;

[0035] Step 4: Apply solder paste 400 on the steel mesh, press the steel mesh downward, and print the solder paste 400 on the first side of the DBC board 300;

[0036] Step 5: Provide a second positioning plate 200, which has a second positioning hole 260, remove the first positioning plate 100 from the printing press, and snap the second positioning plate 200 onto the first positioning plate 100, flip the first positioning plate 100 and the second positioning plate 200, so that the first positioning plate 100 is located above the second positioning plate 200;

[0037] Step 6: turn off the first negative pressure source, turn on the second negative pressure source, so that the DBC board 300 is adsorbed in the second positioning groove 220 of the second positioning plate 200, and the printed solder paste 400 is located in the receiving groove 230, and the first positioning plate 100 is removed;

[0038] Step 7: fix the second positioning plate 200 on the printing press, the printing press identifies the position of the second positioning hole 260 on the second positioning plate 200, and automatically adjusts the relative position between the steel mesh and the DBC plate 300;

[0039] Step 8: Press down the steel mesh and print the solder paste 400 on the second side of the DBC board 300;

[0040] Step nine: disassemble the second positioning plate 200 and remove the DBC plate 300.

[0041] This printing process uses the above-mentioned printing tooling to perform double-sided printing on the DBC board 300, which can effectively prevent the DBC board 300 from being stuck to the steel mesh by the solder paste 400, will not damage the printed solder paste 400, ensure the accuracy of the printed circuit graphics, improve the printing quality, and improve the printing efficiency.

[0042] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A double-sided printing process for a DBC board, characterized in that: The double-sided printing tool of DBC board is adopted, and the double-sided printing tool of DBC board comprises: A first positioning plate (100), wherein a first cavity (110) is formed at a first end of the first positioning plate (100), and a plurality of first positioning grooves (120) are formed at a second end of the first positioning plate (100), and each of the first positioning grooves (120) is formed with a first vertical through hole (130), and the first vertical through hole (130) is connected to the first cavity (110); A second positioning plate (200), wherein a second cavity (210) is formed at a first end of the second positioning plate (200), a plurality of second positioning grooves (220) are formed at a second end of the second positioning plate (200), a receiving groove (230) is formed in the second positioning groove (220), a second vertical through hole (240) is formed in the receiving groove (230), the second vertical through hole (240) is connected to the second cavity (210), and the second positioning plate (200) can be buckled onto the first positioning plate (100); A first negative pressure source, the first negative pressure source being connected to the first cavity (110) via a first air extraction pipe; A second negative pressure source, the second negative pressure source being connected to the second cavity (210) via a second air extraction pipe; The four corners of the first positioning groove (120) are each provided with a first rounded corner (140), and the four corners of the second positioning groove (220) are each provided with a second rounded corner (250); A first positioning hole (150) is formed at the first end of the first positioning plate (100), and a second positioning hole (260) is formed at the first end of the second positioning plate (200); A first horizontal through hole (160) is provided on the side of the first positioning plate (100); one end of the first air extraction pipe is connected to the first negative pressure source, and the other end of the first air extraction pipe is connected to the first horizontal through hole (160); A second horizontal through hole (270) is provided on the side of the second positioning plate (200), one end of the second air extraction pipe is connected to the second negative pressure source, and the other end of the second air extraction pipe is connected to the second horizontal through hole (270); The DBC board double-sided printing process comprises the following steps: Step 1: providing a DBC board (300) and a first positioning board (100), wherein the first positioning board (100) is provided with a first positioning hole (150), and placing the DBC board (300) in the first positioning groove (120) of the first positioning board (100); Step 2: activating the first negative pressure source to extract the air in the first cavity (110), so that the DBC board (300) is adsorbed in the first positioning groove (120); Step 3: fix the first positioning plate (100) on the printing machine, the printing machine identifies the position of the first positioning hole (150) on the first positioning plate (100), and adjusts the relative position between the steel mesh and the DBC plate (300); Step 4: Apply solder paste (400) on the steel mesh, and press the steel mesh downward to print the solder paste (400) on the first side of the DBC board (300); Step 5: Provide a second positioning plate (200), the second positioning plate (200) is provided with a second positioning hole (260), remove the first positioning plate (100) from the printing machine, and snap the second positioning plate (200) onto the first positioning plate (100), flip the first positioning plate (100) and the second positioning plate (200) over so that the first positioning plate (100) is located above the second positioning plate (200); Step 6: close the first negative pressure source, open the second negative pressure source, so that the DBC board (300) is adsorbed in the second positioning groove (220) of the second positioning plate (200), and the printed solder paste (400) is located in the receiving groove (230), and the first positioning plate (100) is removed; Step 7: fix the second positioning plate (200) on the printing machine, the printing machine identifies the position of the second positioning hole (260) on the second positioning plate (200), and automatically adjusts the relative position between the steel mesh and the DBC plate (300); Step 8: Press the steel mesh downward to print the solder paste (400) on the second side of the DBC board (300); Step 9: Disassemble the second positioning plate (200) and remove the DBC plate (300).

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