A pretreatment device for printed circuit board dry film lamination

Abstract

The present invention relates to a pretreatment device before dry film lamination of a printed circuit board, comprising: a base, an acid liquid tank being provided on the base; a loading assembly being provided on the base, the loading assembly comprising an elastic abutment structure, a lifting slot and an interlocking slot, the elastic abutment structure being capable of maintaining an abutment state between the lifting slot and the interlocking slot; a lifting assembly being provided on the base, the lifting assembly being used to drive the loading assembly to lift and lower; an unloading mechanism being connected to the loading assembly, comprising a triggering assembly and a pulling assembly, the pulling assembly being connected to a seesaw rotatably installed in the lifting slot, the triggering assembly being capable of driving the interlocking slot to move away from the lifting slot, and driving the seesaw to flip over through the pulling assembly; a receiving assembly being provided on the base, and being used to carry the solution in the loading assembly, wherein during the movement of the loading assembly into the acid liquid tank, the receiving assembly moves away from the lifting assembly, thereby realizing uninterrupted connection of multiple processes, which can shorten the pretreatment cycle on the one hand, and avoid the problem of excessive corrosion on the other hand.

Description

Technical Field

[0001] The invention relates to the field of printed circuit boards, in particular to pre-processing equipment before dry film lamination of printed circuit boards. Background Art

[0002] Before laminating the printed circuit board, the tin / tin-lead metal solder resist on the surface of the circuit board needs to be stripped and the surface of the circuit board needs to be cleaned with clean water and dried thoroughly. Then, a series of cleaning processes are carried out on the copper surface; the process includes hot alkaline cleaning, water washing, dip pickling, water washing again, and drying.

[0003] Since the above-mentioned process is completed in steps and needs to be processed separately at each workstation, the process is relatively complicated, resulting in a long pretreatment cycle. When the circuit board after pickling and alkali washing is transferred to the next process, a large amount of acid and alkali will still remain on the surface of the circuit board, which can easily corrode the copper layer and cause over-corrosion. Summary of the Invention

[0004] The object of the present invention is to provide a pre-treatment device for dry film lamination of a printed circuit board to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A pretreatment device for a printed circuit board before dry film lamination, comprising:

[0007] A base, wherein an acid tank is provided on the base;

[0008] A loading assembly is provided on the base for receiving the printed circuit board, the loading assembly comprising an elastic abutment structure, a lifting groove and an engaging groove, the elastic abutment structure being capable of maintaining an abutment state between the lifting groove and the engaging groove;

[0009] A lifting assembly is provided on the base, and is used to drive the loading assembly to move up and down;

[0010] The unloading mechanism is connected to the loading assembly and includes a trigger assembly and a pulling assembly. The pulling assembly is connected to a seesaw rotatably mounted in the lifting slot. When the lifting assembly drives the loading assembly downward, the trigger assembly can drive the engaging slot to move away from the lifting slot and drive the seesaw to flip through the pulling assembly.

[0011] The receiving assembly is arranged on the base and is used to carry the solution in the loading assembly. When the loading assembly moves into the acid tank, the receiving assembly moves away from the lifting assembly.

[0012] As a further solution of the present invention: the lifting assembly includes a vertical plate arranged perpendicular to the base, a lifting sleeve is slidably sleeved on the vertical plate, the lifting sleeve is connected to the electric push rod fixed to the vertical plate, and the lifting sleeve is fixedly connected to the lifting slot;

[0013] A horizontal plate is fixed on one end of the vertical plate away from the base, a spray head is fixed on the horizontal plate, and a control switch is provided at the liquid inlet of the spray head.

[0014] As a further solution of the present invention, the elastic abutment structure includes a first cross bar fixed to the fitting groove and slidably connected to the lifting groove, a limit ring is provided at one end of the first cross bar away from the fitting groove, and a first spring is sleeved on the first cross bar, one end of the first spring is connected to the limit ring, and the other end is connected to the fitting groove;

[0015] The elastic abutment structure further includes a counterweight structure provided between the lifting groove and the fitting groove.

[0016] As a further solution of the present invention: the counterweight structure includes a sheave rotatably mounted on the side of the lifting groove and a traction cable with one end fixedly mounted on the engaging groove and the other end wound around the sheave, and a counterweight block is fixed to the end of the traction cable away from the engaging groove.

[0017] As a further embodiment of the present invention, the trigger assembly includes mounting plates fixedly mounted on both sides of the acid tank, triangular pieces fixedly mounted on the inner sides of the mounting plates, the triangular pieces cooperating with pulleys symmetrically mounted on both sides of the engaging groove, so that when the lifting groove descends until the pulleys abut against the triangular pieces, the engaging groove can be moved away from the lifting groove;

[0018] A male groove is provided on the side wall of the lifting groove, and the male groove is adapted to the protrusion provided on the fitting groove, and the bottom of the fitting groove is provided as an inclined surface.

[0019] As a further solution of the present invention: the pulling assembly includes a swing plate fixedly connected to the rotating shaft of the seesaw plate and a telescopic plate rotatably mounted on the lifting groove, and the end of the telescopic plate away from the rotation center is connected to the fitting groove;

[0020] A connecting rod is rotatably mounted on the swing plate, one end of the connecting rod away from the swing plate is connected to the telescopic plate, and the connecting rod is parallel to a line connecting the rotation centers of the swing plate and the telescopic plate.

[0021] As a further solution of the present invention: the telescopic plate includes a rotating rod rotatably mounted on the lifting groove, the rotating rod is rotatably connected to the connecting rod, and a telescopic sleeve is sleeved on the rotating rod, and the end of the telescopic sleeve away from the rotating rod is rotatably connected to the engaging groove.

[0022] As a further solution of the present invention: the receiving assembly includes a guide groove slidably arranged on the base, and an abutment member is installed on each side of the guide groove, and the abutment member is adapted to the pulley;

[0023] The receiving assembly further includes a reset structure provided on the base and connected to the guide groove.

[0024] As a further solution of the present invention: the reset structure includes two No. 2 cross bars fixedly mounted on the base, the No. 2 cross bars are slidably connected to the guide groove, and a No. 2 spring is also sleeved on the No. 2 cross bar, one end of the No. 2 spring is connected to the end of the No. 2 cross bar, and the other end is connected to the guide groove.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The alkali washing, water washing, dip pickling, water washing, and drying processes of the printed circuit board can be carried out continuously. The circuit board does not need to be transferred during the whole process. On the one hand, it can shorten the pretreatment cycle, and on the other hand, it can avoid the problem of excessive corrosion.

[0027] By setting up the loading assembly and the unloading mechanism, on the one hand, the sealing effect between the lifting groove and the interlocking groove is improved, so that the alkaline solution or clean water is stored between the lifting groove and the interlocking groove, which makes the sealing effect better, thereby making the contact time between the printed circuit board and the alkaline solution longer, so as to better remove the grease on the printed circuit board. At the same time, the better sealing effect between the lifting groove and the interlocking groove avoids the alkaline solution from falling into the acid tank to trigger the acid-base neutralization reaction, which generates a lot of heat and reduces the risk level when handling the printed circuit board. On the other hand, in the process of the interlocking groove moving away from the lifting groove, the mixture of clean water and alkaline solution between the lifting groove and the interlocking groove can be better drained, avoiding excessive corrosion. At the same time, since the seesaw can lift one end of the printed circuit board, the flow rate of the mixture of clean water and alkaline solution on the printed circuit board can be accelerated, thereby improving the alkaline washing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a schematic structural diagram of an embodiment of a pre-treatment device for a printed circuit board before dry film lamination.

[0029] Figure 2 This is a structural schematic diagram from another angle of an embodiment of a pre-treatment device for printed circuit board dry film lamination.

[0030] Figure 3 This is a structural schematic diagram from another angle of an embodiment of a pretreatment device for printed circuit board dry film lamination.

[0031] Figure 4 This is a structural schematic diagram of the unloading mechanism in one embodiment of a pretreatment device for printed circuit boards before dry film lamination.

[0032] Figure 5 This is a schematic structural diagram of an elastic abutment structure in an embodiment of a pre-treatment device for a printed circuit board before dry film lamination.

[0033] Figure 6 This is a structural schematic diagram of the lifting groove and the interlocking groove in an embodiment of a pretreatment device for printed circuit boards before dry film lamination.

[0034] Figure 7 This is a structural schematic diagram of a pulling component, a lifting groove, and an engaging groove in an embodiment of a pretreatment device for a printed circuit board before dry film lamination.

[0035] Figure 8 This is a schematic structural diagram of a pulling assembly in one embodiment of a pre-treatment device for a printed circuit board before dry film lamination.

[0036] In the figure: 1. Base; 2. Acid tank; 3. Vertical plate; 4. Electric push rod; 5. Lifting sleeve; 6. Lifting slot; 7. Fitting slot; 8. Male slot; 9. Protrusion; 10. Inclined surface; 11. Cross bar No. 1; 12. Spring No. 1; 13. Sheave; 14. Traction cable; 15. Counterweight; 16. Pulley; 17. Mounting plate; 18. Triangle piece; 19. Guide groove; 20. Abutment piece; 21. Cross bar No. 2; 22. Spring No. 2; 23. Rocker; 24. Swinging plate; 25. Connecting rod; 26. Rotating rod; 27. Telescopic sleeve; 28. Sprinkler head; 29. ​​Control switch; 30. Cross plate. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0039] See also Figures 1 to 8 In an embodiment of the present invention, a pretreatment device for a printed circuit board before dry film lamination includes: a base 1, a loading component, a unloading mechanism, and a receiving component.

[0040] An acid tank 2 is provided on the base 1;

[0041] The lifting assembly is arranged on the base 1 and is used to drive the loading assembly to move up and down;

[0042] The lifting assembly includes a vertical plate 3 arranged perpendicular to the base 1, a lifting sleeve 5 is slidably sleeved on the vertical plate 3, the lifting sleeve 5 is connected to the electric push rod 4 fixed to the vertical plate 3, and the lifting sleeve 5 is fixedly connected to the lifting slot 6;

[0043] A horizontal plate 30 is fixed to one end of the vertical plate 3 away from the base 1 , a spray head 28 is fixed on the horizontal plate 30 , and a control switch 29 is provided at the liquid inlet of the spray head 28 .

[0044] The control switch 29 is an electrically controlled three-way valve, which is connected to an external clean water pumping device (not shown) and an alkaline solution pumping device (not shown), and can be manually controlled to pump clean water or alkaline solution into the sprinkler head 28;

[0045] During use, the loading assembly can be driven up and down by controlling the movement of the action end of the electric push rod 4. Specifically, when the printed circuit board to be processed is placed in the loading assembly, the control switch 29 is controlled to first spray alkali solution into the loading assembly to remove the grease on the printed circuit board, and then clean water is sprayed into the loading assembly by controlling the control switch 29 to flush the alkali solution on the printed circuit board to prevent the alkali solution from excessively corroding the printed circuit board. During this process, the loading assembly is always in a state of slow downward movement, and after the clean water and alkali solution mixture in the loading assembly is completely drained, the loading assembly carries the printed circuit board into the acid tank 2, and the printed circuit board is pickled using the acid solution in the acid tank 2. Then the electric push rod 4 moves in the opposite direction, driving the loading assembly to move upward, and causing the control switch 29 to spray clean water into the loading assembly again to clean the acid solution. After the loading assembly is reset, the printed circuit board is dried by a drying device (not shown in the figure).

[0046] Through the above arrangement, the alkali washing, water washing, dip pickling, re-water washing, and drying processes of the printed circuit board can be carried out continuously. The circuit board does not need to be transferred during the whole process. On the one hand, the pretreatment cycle can be shortened, and on the other hand, the problem of excessive corrosion can be avoided.

[0047] See also Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 The loading assembly is provided on the base 1 for receiving the printed circuit board. The loading assembly includes an elastic abutment structure, a lifting groove 6 and an engaging groove 7. The elastic abutment structure can maintain the abutment state between the lifting groove 6 and the engaging groove 7.

[0048] The elastic abutment structure includes a No. 1 cross bar 11 fixed on the fitting groove 7 and slidably connected to the lifting groove 6, a limit ring is provided on the end of the No. 1 cross bar 11 away from the fitting groove 7, and a No. 1 spring 12 is sleeved on the No. 1 cross bar 11, one end of the No. 1 spring 12 is connected to the limit ring, and the other end is connected to the fitting groove 7;

[0049] The elastic abutment structure further includes a counterweight structure provided between the lifting groove 6 and the fitting groove 7, the counterweight structure including a sheave 13 rotatably mounted on the side of the lifting groove 6 and a traction cable 14 having one end fixedly mounted on the fitting groove 7 and the other end wound around the sheave 13, a counterweight 15 being fixed to the end of the traction cable 14 away from the fitting groove 7;

[0050] The unloading mechanism is connected to the loading assembly, and includes a trigger assembly and a pulling assembly. The pulling assembly is connected to the seesaw 23 rotatably mounted in the lifting groove 6. When the lifting assembly drives the loading assembly to move downward, the trigger assembly can drive the fitting groove 7 to move away from the lifting groove 6, and drive the seesaw 23 to flip through the pulling assembly.

[0051] The trigger assembly includes a mounting plate 17 fixedly mounted on both sides of the acid tank 2, and a triangular member 18 fixedly mounted on the inner side of the mounting plate 17. The triangular member 18 cooperates with the pulleys 16 symmetrically mounted on both sides of the interlocking groove 7 so that when the lifting groove 6 descends until the pulleys 16 abut against the triangular member 18, the interlocking groove 7 can move away from the lifting groove 6;

[0052] A male groove 8 is provided on the side wall of the lifting groove 6, and the male groove 8 is adapted to the protrusion 9 provided on the fitting groove 7, and the bottom of the fitting groove 7 is provided with an inclined surface 10;

[0053] The pulling assembly includes a swing plate 24 fixedly connected to the rotating shaft of the rocker plate 23 and a telescopic plate rotatably mounted on the lifting slot 6, wherein the end of the telescopic plate away from the rotation center is connected to the fitting slot 7;

[0054] A connecting rod 25 is rotatably mounted on the swing plate 24, and the end of the connecting rod 25 away from the swing plate 24 is connected to the telescopic plate, and the connecting rod 25 is parallel to the line connecting the rotation centers of the swing plate 24 and the telescopic plate. The telescopic plate includes a rotating rod 26 rotatably mounted on the lifting slot 6, the rotating rod 26 is rotatably connected to the connecting rod 25, and a telescopic sleeve 27 is sleeved on the rotating rod 26, and the end of the telescopic sleeve 27 away from the rotating rod 26 is rotatably connected to the fitting slot 7.

[0055] In the initial state, due to the presence of the counterweight block 15, the engaging groove 7 can maintain an abutment state with the lifting groove 6. At this time, the No. 1 spring 12 is in a stretched state, and the protrusion 9 on the side of the engaging groove 7 is inserted into the male groove 8. At this time, when clean water or alkaline solution is added to the groove body formed by the lifting groove 6 and the engaging groove 7, it can effectively prevent the clean water or alkaline solution from flowing away from the gap between the lifting groove 6 and the engaging groove 7 and entering the acid tank 2, causing an acid-base neutralization reaction and releasing a large amount of heat. At the same time, the alkaline solution can be stored in the groove body formed by the lifting groove 6 and the engaging groove 7, thereby improving the alkaline washing effect and cleaning the grease on the printed circuit board more thoroughly.

[0056] During the descent of the lifting trough 6 and the interlocking trough 7, the pulley 16 in the interlocking trough 7 will abut against the triangular piece 18, and driven by the triangular piece 18 and the pulley 16, the interlocking trough 7 moves away from the lifting trough 6. At this time, the clean water and alkali solution in the trough body formed by the lifting trough 6 and the interlocking trough 7 fall into the receiving assembly through the gap between the lifting trough 6 and the interlocking trough 7, and flow to the waste liquid storage barrel (not shown in the figure) under the guidance of the receiving assembly, so as to prevent the mixture of clean water and alkali solution from entering the acid tank 2. When the engaging groove 7 moves away from the lifting groove 6, the telescopic rod will be driven to deflect. At the same time, the telescopic rod drives the swing plate 24 to rotate through the connecting rod 25, and deflects the rocker plate 23 set in the lifting groove 6 to tilt one end of the printed circuit board upward, so that the mixture of clean water and alkaline solution adhering to the surface of the printed circuit board can quickly flow into the engaging groove 7. When the clean water and alkaline solution flow into the engaging groove 7, the inclined surface 10 in the engaging groove 7 can make the clean water and alkaline solution flow into the receiving assembly at the lower part.

[0057] Through the above-mentioned arrangement, on the one hand, the sealing effect between the lifting groove 6 and the interlocking groove 7 is improved, so that the alkaline solution or clean water is stored between the lifting groove 6 and the interlocking groove 7, which makes the sealing effect better, thereby making the contact time between the printed circuit board and the alkaline solution longer, so as to better remove the grease on the printed circuit board. At the same time, the better sealing effect between the lifting groove 6 and the interlocking groove 7 avoids the alkaline solution from falling into the acid tank 2 to trigger the acid-base neutralization reaction, thereby generating a large amount of heat, and reducing the degree of danger when handling the printed circuit board. On the other hand, in the process of the interlocking groove 7 moving away from the lifting groove 6, the mixture of clean water and alkaline solution between the lifting groove 6 and the interlocking groove 7 can be better lost, avoiding excessive corrosion. At the same time, since the rocker 23 can lift one end of the printed circuit board, the flow rate of the mixture of clean water and alkaline solution on the printed circuit board can be accelerated, thereby improving the alkaline washing efficiency.

[0058] See also Figure 1 、 Figure 4 The receiving assembly is provided on the base 1 and is used to carry the solution in the loading assembly. When the loading assembly moves into the acid tank 2, the receiving assembly moves away from the lifting assembly.

[0059] The receiving assembly includes a guide groove 19 slidably arranged on the base 1 , and an abutment member 20 is installed on each side of the guide groove 19 , and the abutment member 20 is adapted to the pulley 16 ;

[0060] The receiving assembly also includes a reset structure arranged on the base 1 and connected to the guide groove 19, and the reset structure includes two No. 2 cross bars 21 fixedly mounted on the base 1, and the No. 2 cross bars 21 are slidingly connected to the guide groove 19. A No. 2 spring 22 is also sleeved on the No. 2 cross bar 21, and one end of the No. 2 spring 22 is connected to the end of the No. 2 cross bar 21, and the other end is connected to the guide groove 19.

[0061] During use, after the mixture of clean water and alkali solution in the lifting groove 6 and the interlocking groove 7 is completely lost, the pulley 16 will separate from the triangular piece 18, and then as the pulley 16 continues to move downward, the pulley 16 abuts against the abutment 20 to drive the guide groove 19 to move away from the acid tank 2 to prevent interference with the guide groove 19 during the descent of the lifting groove 6 and the interlocking groove 7. After that, the lifting groove 6 and the interlocking groove 7 continue to descend until the counterweight block 15 abuts against the bottom of the acid tank 2. At this time, the traction of the counterweight block 15 is lost, the No. 1 spring 12 releases its elastic potential energy, and drives the interlocking groove 7 away from the lifting groove 6. At this time, there is a gap between the lifting groove 6 and the interlocking groove 7, so that the acid in the acid tank 2 can better enter the lifting groove 6 and the interlocking groove 7, thereby pickling the printed circuit board.

[0062] In summary, during use, by controlling the movement of the action end of the electric push rod 4, the loading assembly can be driven to rise and fall. Specifically, when the printed circuit board to be processed is placed in the loading assembly, the control switch 29 is controlled to first spray alkali solution into the loading assembly to remove the grease on the printed circuit board, and then clean water is sprayed into the loading assembly by controlling the control switch 29 to flush the alkali solution on the printed circuit board to prevent the alkali solution from excessively corroding the printed circuit board. During this process, the loading assembly is always in a state of slow downward movement, and after the clean water and alkali solution mixture in the loading assembly is completely drained, the loading assembly carries the printed circuit board into the acid tank 2, and the printed circuit board is pickled using the acid solution in the acid tank 2. Then, the electric push rod 4 moves in the opposite direction, driving the loading assembly to move upward, and causing the control switch 29 to spray clean water into the loading assembly again to clean the acid solution. After the loading assembly is reset, the printed circuit board is dried by a drying device (not shown in the figure).

[0063] In the initial state, due to the presence of the counterweight block 15, the engaging groove 7 can maintain an abutment state with the lifting groove 6. At this time, the No. 1 spring 12 is in a stretched state, and the protrusion 9 on the side of the engaging groove 7 is inserted into the male groove 8. At this time, when clean water or alkaline solution is added to the groove body formed by the lifting groove 6 and the engaging groove 7, it can effectively prevent the clean water or alkaline solution from flowing away from the gap between the lifting groove 6 and the engaging groove 7 and entering the acid tank 2, causing an acid-base neutralization reaction and releasing a large amount of heat. At the same time, the alkaline solution can be stored in the groove body formed by the lifting groove 6 and the engaging groove 7, thereby improving the alkaline washing effect and cleaning the grease on the printed circuit board more thoroughly.

[0064] During the descent of the lifting trough 6 and the interlocking trough 7, the pulley 16 in the interlocking trough 7 will abut against the triangular piece 18, and driven by the triangular piece 18 and the pulley 16, the interlocking trough 7 moves away from the lifting trough 6. At this time, the clean water and alkali solution in the trough body formed by the lifting trough 6 and the interlocking trough 7 fall into the receiving assembly through the gap between the lifting trough 6 and the interlocking trough 7, and flow to the waste liquid storage barrel (not shown in the figure) under the guidance of the receiving assembly, so as to prevent the mixture of clean water and alkali solution from entering the acid tank 2. When the engaging groove 7 moves away from the lifting groove 6, the telescopic rod will be driven to deflect. At the same time, the telescopic rod drives the swing plate 24 to rotate through the connecting rod 25, and deflects the rocker plate 23 set in the lifting groove 6 to tilt one end of the printed circuit board upward, so that the mixture of clean water and alkaline solution adhering to the surface of the printed circuit board can quickly flow into the engaging groove 7. When the clean water and alkaline solution flow into the engaging groove 7, the inclined surface 10 in the engaging groove 7 can make the clean water and alkaline solution flow into the receiving assembly at the lower part.

[0065] When the mixture of clean water and alkali solution in the lifting groove 6 and the interlocking groove 7 is completely drained, the pulley 16 will separate from the triangular piece 18, and then as the pulley 16 continues to move downward, the pulley 16 abuts against the abutment 20 to drive the guide groove 19 away from the acid tank 2 to prevent interference with the guide groove 19 during the descent of the lifting groove 6 and the interlocking groove 7. After that, the lifting groove 6 and the interlocking groove 7 continue to descend until the counterweight block 15 abuts against the bottom of the acid tank 2. At this time, the traction of the counterweight block 15 is lost, and the No. 1 spring 12 releases its elastic potential energy and drives the interlocking groove 7 away from the lifting groove 6. At this time, there is a gap between the lifting groove 6 and the interlocking groove 7, so that the acid in the acid tank 2 can better enter the lifting groove 6 and the interlocking groove 7, thereby pickling the printed circuit board.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0067] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A pretreatment device for dry film lamination of printed circuit boards, characterized in that: include: A base (1), wherein an acid tank (2) is provided on the base (1); A loading assembly is arranged on the base (1) and is used to receive the printed circuit board. The loading assembly comprises an elastic abutment structure, a lifting groove (6) and an interlocking groove (7). The elastic abutment structure can maintain an abutting state between the lifting groove (6) and the interlocking groove (7); A lifting assembly is provided on the base (1), and is used to drive the loading assembly to move up and down; A discharge mechanism is connected to the loading assembly, comprising a trigger assembly and a pulling assembly, wherein the pulling assembly is connected to a seesaw (23) rotatably mounted in the lifting groove (6), and when the lifting assembly drives the loading assembly to move downward, the trigger assembly can drive the engaging groove (7) to move away from the lifting groove (6), and drive the seesaw (23) to flip through the pulling assembly; A receiving assembly is provided on the base (1) and is used to carry the solution in the loading assembly. When the loading assembly moves into the acid tank (2), the receiving assembly moves away from the lifting assembly. The elastic abutment structure comprises a cross bar (11) fixed on the fitting groove (7) and slidably connected to the lifting groove (6), a limit ring is provided at one end of the cross bar (11) away from the fitting groove (7), and a spring (12) is sleeved on the cross bar (11), one end of the spring (12) is connected to the limit ring, and the other end is connected to the fitting groove (7); The elastic abutment structure further comprises a counterweight structure arranged between the lifting groove (6) and the fitting groove (7); The trigger assembly includes a mounting plate (17) fixedly mounted on both sides of the acid tank (2), a triangular member (18) fixedly mounted on the inner side of the mounting plate (17), and the triangular member (18) cooperates with pulleys (16) symmetrically mounted on both sides of the interlocking groove (7) so that when the lifting groove (6) descends until the pulleys (16) abut against the triangular member (18), the interlocking groove (7) can move away from the lifting groove (6); A male groove (8) is provided on the side wall of the lifting groove (6), the male groove (8) is adapted to the protrusion (9) provided on the fitting groove (7), and the bottom of the fitting groove (7) is provided with an inclined surface (10).

2. The pretreatment equipment for dry film lamination of printed circuit boards according to claim 1, characterized in that: The lifting assembly comprises a vertical plate (3) arranged perpendicular to the base (1); a lifting sleeve (5) is slidingly sleeved on the vertical plate (3); the lifting sleeve (5) is connected to an electric push rod (4) fixed on the vertical plate (3), and the lifting sleeve (5) is fixedly connected to the lifting slot (6); A horizontal plate (30) is fixed to one end of the vertical plate (3) away from the base (1), a spray head (28) is fixed on the horizontal plate (30), and a control switch (29) is provided at the liquid inlet of the spray head (28).

3. The pretreatment equipment for dry film lamination of printed circuit boards according to claim 1, characterized in that: The counterweight structure comprises a sheave (13) rotatably mounted on the side of the lifting groove (6) and a traction cable (14) with one end fixedly mounted on the engaging groove (7) and the other end wound around the sheave (13). A counterweight block (15) is fixed to the end of the traction cable (14) away from the engaging groove (7).

4. The pretreatment equipment for dry film lamination of printed circuit boards according to claim 1, characterized in that: The pulling assembly comprises a swing plate (24) fixedly connected to the rotating shaft of the seesaw (23) and a telescopic plate rotatably mounted on the lifting slot (6), wherein one end of the telescopic plate away from the rotation center is connected to the engaging slot (7); A connecting rod (25) is rotatably mounted on the swing plate (24), and one end of the connecting rod (25) away from the swing plate (24) is connected to the telescopic plate, and the connecting rod (25) is parallel to a line connecting the rotation centers of the swing plate (24) and the telescopic plate.

5. The pretreatment equipment for dry film lamination of printed circuit boards according to claim 4, characterized in that: The telescopic plate comprises a rotating rod (26) rotatably mounted on the lifting groove (6), the rotating rod (26) being rotatably connected to the connecting rod (25), and a telescopic sleeve (27) being sleeved on the rotating rod (26), and an end of the telescopic sleeve (27) away from the rotating rod (26) being rotatably connected to the fitting groove (7).

6. The pretreatment equipment for dry film lamination of printed circuit boards according to claim 1, characterized in that: The receiving assembly comprises a guide groove (19) slidably arranged on the base (1), and an abutment member (20) is installed on each side of the guide groove (19), and the abutment member (20) is adapted to the pulley (16); The receiving assembly further comprises a reset structure provided on the base (1) and connected to the guide groove (19).

7. The pretreatment equipment for dry film lamination of printed circuit boards according to claim 6, characterized in that: The reset structure comprises two No. 2 cross bars (21) fixedly mounted on the base (1), the No. 2 cross bars (21) being slidably connected to the guide groove (19), and a No. 2 spring (22) being sleeved on the No. 2 cross bars (21), one end of the No. 2 spring (22) being connected to the end of the No. 2 cross bars (21), and the other end being connected to the guide groove (19).

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