Support device for printed circuit board automatic exposure machine

Abstract

The present application relates to a support device for a printed circuit board automatic exposure machine. It comprises a base plate and a U-shaped auxiliary plate. The base plate is provided with a plurality of through holes; the base plate is used to support the PCB board; the U-shaped auxiliary plate is U-shaped; the U-shaped auxiliary plate is detachably arranged on the surface of the base plate, and is used to surround the PCB board and cover part of the through holes. The present application has the following beneficial effects: through the redesign and use of the base plate, the frequent process of assembling and disassembling the original base plate when converting different size PCB boards is avoided, and the wear is reduced. The added U-shaped auxiliary plate and the scale ruler can perfectly match PCB boards of various sizes, save the time of replacing the original base plate, avoid the process of sealing with adhesive tape, save labor, and improve work efficiency. The number of board replacement is reduced, and the cross contamination of dust and other impurities caused by base plate wear is reduced, and the exposure quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a support device for a printed circuit board automatic exposure machine. BACKGROUND

[0002] The development of communication technology has made laser automatic imaging technology widely used in printed circuit board pattern transfer process. The full-automatic (LDI) exposure machine can directly image on the PCB board without using film, which reduces the deviation caused by film expansion and positioning, and can make finer lines. The workbench of the LDI exposure machine needs to use a pad to ensure that the PCB board is vacuumed with the workbench. Currently, the use method of the pad is to select the air hole pad that matches or is close to the size of the PCB board according to different board sizes, which may have the following problems or deficiencies:

[0003] 1. When the size of the PCB board is smaller than the air hole area of the pad, the excess air hole needs to be manually taped and sealed with adhesive tape to ensure the vacuum pressure of the workbench. At this time, the deviation of the adhesive tape will cause poor vacuum on the edge of the PCB board, and the foreign matter falling off due to the friction contact between the adhesive tape and the pad will also cause cross contamination during the exposure process, which will all lead to the decline of the exposure quality and affect the product yield.

[0004] 2. When making PCB boards of different sizes, different size pads need to be frequently installed and removed, which will cause damage to the corners of the pad due to collision. The dust generated during the wear process will cause exposure foreign matter and affect the product yield. The pad with excessive wear will decrease the positioning degree and vacuum suction capacity, which will shorten the service life of the pad and need to be replaced by the exposure machine supplier, which is expensive. SUMMARY

[0005] One of the purposes of the present application is to overcome the deficiencies in the prior art and provide a printed circuit board automatic exposure machine support device that reduces pad wear.

[0006] To achieve the above purpose, the present application realizes the following technical solutions:

[0007] The printed circuit board automatic exposure machine support device comprises:

[0008] a pad, wherein the pad is provided with a plurality of through holes; and the pad is used to support the PCB board;

[0009] a U-shaped auxiliary plate, wherein the U-shaped auxiliary plate is in a U shape;

[0010] The U-shaped auxiliary plate is detachably arranged on the surface of the pad, and the U-shaped auxiliary plate is used to surround the PCB board and cover part of the through holes.

[0011] According to one embodiment of the present application, each pad is provided with a plurality of U-shaped auxiliary plates; and the widths of the plurality of U-shaped auxiliary plates are different.

[0012] According to one embodiment of the present application, the support device further comprises a machine table provided with a recess; the backing plate is detachably arranged in the recess.

[0013] According to one embodiment of the present application, the machine table is provided with a scale line.

[0014] According to one embodiment of the present application, the backing plate is detachably connected or non-detachably connected with the machine table.

[0015] According to one embodiment of the present application, the U-shaped auxiliary plate is bonded with the machine table or the backing plate.

[0016] According to one embodiment of the present application, the U-shaped auxiliary plate is bonded with the backing plate or the machine table by using a film adhesive tape.

[0017] According to one embodiment of the present application, the U-shaped auxiliary plate is connected with the backing plate by magnetic adsorption.

[0018] According to one embodiment of the present application, the backing plate is a polymer material plate with copper foil on both sides; the U-shaped auxiliary plate is a polymer material plate.

[0019] The application discloses an automatic exposure fixing method for a printed circuit board.

[0020] 1) providing a machine table provided with a recess, the recess being provided with an air extraction groove, the air extraction groove being communicated with a vacuum extraction device; the machine table is provided with a scale line;

[0021] 2) providing a backing plate provided with a through hole, the backing plate being arranged in the recess, the backing plate being detachably connected or non-detachably connected with the machine table, the through hole being communicated with the air extraction groove;

[0022] 3) providing a printed circuit board, the printed circuit board being placed on the surface of the backing plate, the printed circuit board being positioned according to the scale line, and the printed circuit board covering part of the through hole;

[0023] 4) providing a U-shaped auxiliary plate, the U-shaped auxiliary plate being arranged on the surface of the backing plate and surrounding the printed circuit board; the U-shaped auxiliary plate covering another part of the through hole;

[0024] 5) using an adhesive tape to bond the U-shaped auxiliary plate with the backing plate and / or the machine table.

[0025] The application has the following beneficial effects:

[0026] 1. By redesigning and using the cushion plate, the process of frequently assembling and disassembling the original cushion plate when converting different size PCB boards is avoided, wear is reduced, and the service life of the LDI cushion plate is extended from the current 1 year to more than 3 years. The original structure cushion plate is 5000 yuan per piece, and each cushion plate can save 10000 yuan per year, which greatly saves the production cost.

[0027] 2. The added U-shaped auxiliary plate and scale ruler can perfectly match PCB boards of various sizes, saving the time of replacing the original cushion plate, avoiding the process of sealing with adhesive tape, saving labor, and improving work efficiency.

[0028] 3. The number of board changes is reduced, thereby reducing cross contamination of dust and other impurities caused by cushion plate wear, and improving exposure quality. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A support device structure diagram for a printed circuit board automatic exposure machine in the present application.

[0030] Figure 2 A-A sectional view of Figure 1 . DETAILED DESCRIPTION

[0031] As shown in Figure 1 , Figure 2 , the support device 100 for the printed circuit board automatic exposure machine includes a machine table 110, a cushion plate 120, and a U-shaped auxiliary plate 130. The cushion plate 120 is connected to the machine table 110, and the U-shaped auxiliary plate 130 is detachably arranged on the surface of the cushion plate 120.

[0032] The machine table 110 is provided with a groove 111 for accommodating the cushion plate 120. The groove 111 of the machine table 110 is provided with an air extraction groove 112. The air extraction groove 112 is in communication with a vacuum extraction device (not shown in the figure). The machine table 110 is provided with a scale line 113. The scale line 113 is arranged on one side of the groove 111.

[0033] The cushion plate 120 is a double-sided copper clad plate, which comprises a polymer material layer 121 and a copper foil 122. The upper and lower surfaces of the polymer material layer 121 are respectively provided with a copper foil 122. The cushion plate 120 is provided with a plurality of through holes 123. The through holes 123 penetrate through the cushion plate 120. The shape of the cushion plate 120 is determined according to the printed circuit board 200. In one example shown in the figure, the cushion plate 120 is rectangular. The cushion plate 120 is arranged in the groove 111 and used to support the printed circuit board 200 which needs to be exposed. The through holes 123 are opposite to the air suction groove 112, and the vacuum suction device can suction the printed circuit board 200 to the surface of the cushion plate 120 through the air suction groove 112 and the through holes 123. The size of the cushion plate 120 is greater than or equal to the size of the largest printed circuit board 200 which needs to be exposed. When the printed circuit board 200 is placed on the cushion plate 120, part of the through holes 123 is covered and part of the through holes 123 is exposed. The more through holes 123 covered by the printed circuit board 200, the better the adsorption effect. The greater the size difference between the printed circuit board 200 and the cushion plate 120, the more through holes 123 are exposed.

[0034] The U-shaped auxiliary plate 130 is in the shape of U and is a polymer material plate. The U-shaped auxiliary plate 130 is placed on the surface of the cushion plate 120 and detachably connected with the cushion plate 120 or the machine table 110. The connection mode can be adhesion, such as using a film adhesive tape. The U-shaped auxiliary plate 130 surrounds the printed circuit board 200 from three sides. The side of the printed circuit board 200 opposite to the scale line 113 is not blocked by the U-shaped auxiliary plate 130, so that the printed circuit board 200 can be placed on the cushion plate 120 to determine the accurate position according to the scale line 113. The through holes 123 not covered by the printed circuit board 200 are covered. Each cushion plate 120 is equipped with a plurality of U-shaped auxiliary plates 130 with different widths. The appropriate U-shaped auxiliary plate 130 is selected according to the size of the printed circuit board 200. The printed circuit board 200 and the U-shaped auxiliary plate 130 together cover all the through holes 123 of the cushion plate 120.

[0035] According to an alternative embodiment of the present application, the U-shaped auxiliary plate 130 and the cushion plate 120 can also be connected by magnetic adsorption, such as respectively arranging magnetic materials on the U-shaped auxiliary plate 130 and the cushion plate 120 to attract each other.

[0036] The automatic exposure fixing method of the printed circuit board comprises the following steps: Figure 1 , Figure 2

[0037] 1) providing a machine table 110, the machine table 110 is provided with a groove, and the groove is provided with an air suction groove 112; the air suction groove 112 is communicated with a vacuum suction device (not shown in the figure); the machine table 110 is provided with a scale line 113;

[0038] ​2), provide the backing plate 120, the backing plate 120 is provided with through hole 123, the backing plate 120 is arranged in the recess and is detachably connected or not detachably connected with the machine table 110, the through hole 123 is communicated with the air extraction groove 112;

[0039] 3), provide printed circuit board 200, printed circuit board 200 is placed on the surface of the backing plate 120, and the printed circuit board 200 is positioned according to the scale line 113, and the printed circuit board 200 covers part of the through hole 123;

[0040] 4), provide U-shaped auxiliary plate 130, the U-shaped auxiliary plate 130 is arranged on the surface of the backing plate 120 and is arranged around the printed circuit board 200, and the U-shaped auxiliary plate 130 covers another part of the through hole 123;

[0041] 5), the U-shaped auxiliary plate 130 is bonded with the backing plate 120 and / or the machine table 110 using adhesive tape (not shown in the figure).

[0042] The present application has the following beneficial effects:

[0043] 1, by redesigning and using the backing plate, the frequent process of assembling and disassembling the original backing plate when converting different size PCB boards is avoided, wear is reduced, and the service life of the LDI backing plate is extended from the current 1 year to more than 3 years. The original structure backing plate is 5000 yuan per piece, and each backing plate can save 10000 yuan per year, which greatly saves the production cost.

[0044] 2, the U-shaped auxiliary plate and the scale are marked, which can perfectly match various sizes of PCB boards, save the time of replacing the original backing plate, avoid the process of sealing with adhesive tape, and replace the double table backing plate using the original supporting device for about 4 minutes per time, replace the double table backing plate using the supporting device in the application for about 1 minute per time, the efficiency is improved by 75%, and the labor is saved; about 30 times of replacing the backing plate per day, 1.5 hours of time saving per day, about 6% (1.5 / 24=0.06) of daily production capacity improvement, effectively improving the operation efficiency.

[0045] 3, using the supporting device in the application, the number of replacing the plate is reduced, and the cross contamination of dust and other impurities caused by the wear of the backing plate is reduced, and the exposure quality is improved. As shown in Table 1, the scrap caused by exposure impurities is counted for 5 products using the original supporting device and the supporting device in the application respectively, and the scrap rate is reduced by 32%, which is remarkable. Figure 1

[0046] Table 1: scrap statistics caused by exposure impurities

[0047] Stage Date Product 1 Product 2 Product 3 Product 4 Product 5 Average Original device 2021-Q4 0.15％ 0.14％ 0.21％ 0.08％ 0.17％ 0.150％ Device of the invention 2022-Q1 0.08％ 0.07％ 0.15％ 0.06％ 0.12％ 0.096％

[0048] ​The above merely illustrates the preferred embodiments of the present application, and is not used to limit the protection scope of the present application, any modification, equivalent replacement or improvement within the spirit of the present application is included in the protection scope of the present application.

Claims

1. A support device for an automatic exposure machine for printed circuit boards, characterized in that, The utility model relates to a support device for PCB board, comprising: a cushion plate provided with a plurality of through holes; the cushion plate is used for supporting the PCB board; a U-shaped auxiliary plate, which is U-shaped; the U-shaped auxiliary plate is detachably arranged on the surface of the cushion plate, and is used for surrounding the PCB board and covering part of the through holes; the support device further comprises a machine table provided with a groove; the cushion plate is detachably arranged in the groove; each cushion plate is provided with a plurality of U-shaped auxiliary plates; the widths of the plurality of U-shaped auxiliary plates are different; the machine table is provided with a scale line.

2. The support device for a printed wiring board automatic exposure machine according to claim 1, characterized by The cushion plate and the machine table are detachably connected or non-detachably connected.

3. The support device for a printed wiring board automatic exposure machine according to claim 1, wherein The U-shaped auxiliary plate is bonded to the machine table or the cushion plate.

4. The support device for a printed wiring board automatic exposure machine according to claim 3, wherein The U-shaped auxiliary plate is bonded to the machine table or the cushion plate by a film adhesive tape.

5. The support device for a printed wiring board automatic exposure machine according to claim 1, wherein The groove is provided with an air extraction groove in communication with a vacuum extraction device.

6. The support device for a printed wiring board automatic exposure machine according to claim 1, wherein The U-shaped auxiliary plate is connected to the cushion plate by magnetic adsorption.

7. The support device for a printed wiring board automatic exposure machine according to claim 1, wherein The cushion plate is a polymer material plate with copper foil on both sides; the U-shaped auxiliary plate is a polymer material plate.

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