A lead frame etching device

Abstract

This invention discloses a lead frame etching device, including a worktable. A water tank for holding etching solution is fixedly installed on the top of the worktable via a support block. A mounting frame is fixedly connected to the top of the worktable, and a sliding frame is slidably connected to one side of the mounting frame. A laser etching head for etching is set on the top of the sliding frame. Conveyor belts for conveying the lead frame are set on both sides of the inner wall of the water tank. An electric hydraulic cylinder is installed inside the water tank, and a sliding sleeve is fitted on the output end of the electric hydraulic cylinder. When the electric hydraulic cylinder extends continuously, it can push the top plate to move upward. By using the limiting of the lower pressure plate, the lead frame material is fixed between the top plate and the lower pressure plate. Elastic fixation is achieved by thrust springs and top springs to avoid damage to the lead frame during fixation. This prevents external factors from displacing the laser etching head during etching, thus avoiding insufficient etching accuracy.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of lead frame processing, and particularly relates to a lead frame etching equipment. BACKGROUND

[0002] As a chip carrier of an integrated circuit, a lead frame is a key structural member for realizing electrical connection between an external lead and an external circuit lead-out end in a chip through a bonding material (gold wire, aluminum wire or copper wire), and forms a key structure of an electrical circuit, and plays a role of a bridge for connecting with an external wire, and is used in most semiconductor integrated blocks and is an important basic material in the electronic information industry.

[0003] A patent of China discloses a lead frame etching equipment (publication number: CN209843664U), which comprises a coverless etching box, and etching chambers and rinsing chambers are horizontally and spaced apart in the etching box, so that etching and cleaning work of the existing etching equipment are carried out separately, the complexity of the etching process is increased, the production efficiency of the lead frame is reduced, and the problem that the etching forming condition of the original workpiece is not easy to observe when the original workpiece is immersed in etching liquid is solved. However, if cleaning is not performed when the etching equipment is etched, the particles etched may affect the precision and yield of the subsequent etching of the lead frame, and when the etching liquid is used to flush the etching equipment, the position of the etching equipment may be changed, and the etching precision is not high. SUMMARY

[0004] The application aims to provide a lead frame etching equipment, which comprises an electric hydraulic cylinder arranged in a water tank, and a sliding sleeve arranged on the output end of the electric hydraulic cylinder. When the electric hydraulic cylinder is continuously elongated, the top plate can be pushed to move upward, and the lead frame material is fixed between the top plate and the lower pressing plate through the limiting of the lower pressing plate. The lead frame is elastically fixed by the thrust spring and the top force spring to avoid damage to the lead frame during fixing. When the lead frame is etched by the laser etching head, the lead frame is prevented from being displaced by external factors, and the etching precision is not accurate.

[0005] The application can be achieved by the following technical scheme.

[0006] The utility model provides a kind of lead frame etching equipment, including workbench, the top of the workbench is fixedly installed with water tank for placing etching liquid by support block, the top of the workbench is fixedly connected with mounting bracket, the side of the mounting bracket is slidably connected with sliding frame, the top of the sliding frame is provided with laser etching head for etching, the inner wall of the water tank is provided with conveying belt for conveying lead frame on both sides, the electric hydraulic cylinder is penetrated and arranged on both sides in the water tank, the output end of two electric hydraulic cylinders is provided with sliding sleeve, the top of two sliding sleeves is fixedly connected with top plate, the water tank top is provided with the lower plate for pressing lead frame on both sides, and the etching end of the laser etching head is located above the top plate

[0007] As a further scheme of the utility model: the top of the workbench is fixedly connected with drive mechanism on one side, the drive mechanism is used to drive two conveying belts to carry out synchronous transmission, the drive mechanism includes transmission case, the transmission case is fixedly installed on the top of workbench, the side of the transmission case is provided with drive motor, and drive shaft is penetrated and arranged on the transmission case, one end of the drive shaft is penetrated and arranged through the water tank and is fixedly connected with the drive roll of conveying belt.

[0008] As a further scheme of the utility model: the output end of the electric hydraulic cylinder is fixedly connected with sliding plate, the outer surface of the sliding plate is slidably connected with the inner surface of the sliding sleeve, the top of the sliding plate is fixedly connected with top force spring, and the top end of the top force spring is fixedly connected with the bottom of the top plate.

[0009] As a further scheme of the utility model: the top of the lower plate is penetrated and set with through hole on both sides, the top of the water tank is fixedly connected with limiting rod inside through hole, the surface of the limiting rod is sleeved with push spring, and the bottom end of the push spring is fixedly connected with the top of the lower plate.

[0010] As a further scheme of the utility model: the side of the lower plate is penetrated and set with nozzle for washing lead frame, the bottom of the water tank inner chamber is fixedly installed with water pump on both sides, the water outlet end of the water pump is communicated with hose, and one end of the hose is communicated with one end of the nozzle.

[0011] As a further scheme of the utility model: the idle area is formed between two conveying belts, two water pumps and etching liquid are located in idle area, the bottom of the water tank is penetrated and set with drain pipe, and the surface of the drain pipe is fixedly connected with electromagnetic control valve.

[0012] As a further scheme of the utility model: the top of the sliding frame is fixedly connected with slide rail on both sides, and the outer surface of the slide rail is slidably connected with the bottom of the laser etching head.

[0013] As a further scheme of the present application: the top of the sliding frame is provided with a sliding groove, the bottom of the sliding frame is fixedly connected with an electric telescopic rod, the top of the laser etching head and inside the sliding groove are fixedly connected with a connecting plate, the top of the connecting plate is fixedly connected with the bottom of the laser etching head, and the outer surface of the connecting plate is in sliding connection with the inner surface of the sliding groove.

[0014] The present application has the following beneficial effects:

[0015] (1) In the present application, by arranging an electric hydraulic cylinder in the water tank, and sleeving a sliding sleeve on the output end of the electric hydraulic cylinder, when the electric hydraulic cylinder continuously extends, the top plate can be pushed to move upward, and the lead frame material is fixed between the top plate and the lower pressing plate by limiting the lower pressing plate, and is elastically fixed by the thrust spring and the top force spring to avoid damage to the lead frame when it is fixed, so that when the laser etching head etches it, external factors are avoided to cause displacement, resulting in insufficient etching precision.

[0016] (2) In the present application, by arranging a conveying belt on both sides of the inner wall of the water tank, an empty area is formed in the water tank, the water pump is arranged in the empty area, and the etching liquid is poured into the empty area, so as to facilitate washing and cooling of the material being etched. At this time, the etching liquid will flow back to the empty area of the water tank for recycling, further improving its practicability.

[0017] (3) In the present application, by opening a water tank on the sliding frame, the connecting plate in the sliding groove is used, and the electric telescopic rod is elongated, so that the connecting plate drives the laser etching head to slide on the slide rail, and further drives the laser etching head to slide on the slide rail, so that when the lead frame material is fixed by the top plate and the lower pressing plate, the laser etching head is precisely moved on the surface to etch more accurately, further improving the etching precision. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below with reference to the drawings.

[0019] Figure 1 is the external structure front view of the etching equipment in the present application;

[0020] Figure 2 is the external structure top view of the etching equipment in the present application;

[0021] Figure 3 is the hidden account structure schematic view of the top plate in the present application;

[0022] Figure 4 is the internal structure schematic view of the lower pressing plate in the present application.

[0023] In the figure: 1, workbench; 2, water tank; 3, mounting frame; 4, sliding frame; 5, laser etching head; 6, liquid discharge pipe; 7, conveying belt; 8, driving mechanism; 9, electric hydraulic cylinder; 10, sliding sleeve; 11, top plate; 12, sliding plate; 13, top force spring; 14, lower pressing plate; 15, through hole; 16, limiting rod; 17, thrust spring; 18, water pump; 19, hose; 20, spray head; 21, electric telescopic rod; 22, sliding groove; 23, connecting plate; 24, sliding rail. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0025] Please refer to Figures 1-4As shown, the present application is a lead frame etching equipment, including a workbench 1, the top of the workbench 1 is fixedly installed with a water tank 2 for placing etching liquid through a support block, the top of the workbench 1 is fixedly connected with a mounting frame 3, one side of the mounting frame 3 is slidably connected with a sliding frame 4, a driving mechanism 8 is arranged on the mounting frame 3 for pushing the sliding frame 4 to slide, the top of the sliding frame 4 is provided with a laser etching head 5 for etching, both sides of the inner wall of the water tank 2 are provided with a conveying belt 7 for conveying lead frames, both sides of the inside of the water tank 2 are provided with an electric hydraulic cylinder 9, the electric hydraulic cylinder 9 is electrically connected with an external power supply, the output end of the two electric hydraulic cylinders 9 is provided with a sliding sleeve 10, the top of the two sliding sleeves 10 is fixedly connected with a top plate 11, the output end of the electric hydraulic cylinder 9 is fixedly connected with a sliding plate 12, the outer surface of the sliding plate 12 is slidably connected with the inner surface of the sliding sleeve 10, the top of the sliding plate 12 is fixedly connected with a top force spring 13, the top end of the top force spring 13 is fixedly connected with the bottom of the top plate 11, the etching end of the laser etching head 5 is located above the top plate 11, both sides of the top of the water tank 2 are provided with a pressing plate 14 for pressing the lead frame downward, both sides of the top of the water tank 2 are provided with a through hole 15, the top of the water tank 2 is fixedly connected with a limiting rod 16 inside the through hole 15, the surface of the limiting rod 16 is sleeved with a thrust spring 17, the bottom end of the thrust spring 17 is fixedly connected with the top of the pressing plate 14, when the top plate 11 moves upward, the pressing plate 14 can be pushed to move upward, and at this time the thrust spring 17 is compressed, thereby giving the pressing plate 14 a downward pushing pressure, one side of the pressing plate 14 is provided with a nozzle 20 for cleaning the lead frame, and the nozzle 20 is inclinedly arranged on the pressing plate 14, when the electric hydraulic cylinder 9 continuously extends, the top plate 11 can be pushed to move upward, and the limiting of the pressing plate 14 is utilized, so as to fix the lead frame material between the top plate 11 and the pressing plate 14, and the lead frame material is elastically fixed through the thrust spring 17 and the top force spring 13, so as to avoid damaging the lead frame when it is fixed, thereby avoiding displacement of the lead frame caused by external factors when the laser etching head 5 etches the lead frame, so as to ensure the etching precision, both sides of the bottom of the inner cavity of the water tank 2 are fixedly installed with a water pump 18, the water suction end of the water pump 18 is provided with a filtering assembly, the filtering assembly can filter particulate matter in the etching liquid, the water outlet end of the water pump 18 is communicated with a hose 19, the hose 19 is long enough to cooperate with the upward or downward movement of the pressing plate 14, one end of the hose 19 is communicated with one end of the nozzle 20.

[0026] In order to ensure that the two conveying belts 7 synchronously convey the lead frame, one side of the top of the workbench 1 is fixedly connected with a driving mechanism 8, the driving mechanism 8 is used for driving the two conveying belts 7 to synchronously drive, the driving mechanism 8 comprises a transmission box, the transmission box is fixedly installed on the top of the workbench 1, one side of the transmission box is provided with a driving motor, and a driving shaft is penetratingly arranged on the transmission box, one end of the driving shaft penetrates through the water tank 2 and is fixedly connected with the driving roller of the conveying belt 7.

[0027] Since the lead frame material is fixed between the top plate 11 and the lower pressing plate 14, in order to enable the laser etching head 5 to move laterally, both sides of the top of the sliding frame 4 are fixedly connected with sliding rails 24, the outer surfaces of the sliding rails 24 are slidably connected with the bottom of the laser etching head 5, the top of the sliding frame 4 is provided with a sliding groove 22, the bottom of the sliding frame 4 is fixedly connected with an electric telescopic rod 21, the top of the laser etching head 5 and inside the sliding groove 22 are fixedly connected with a connecting plate 23, the top of the connecting plate 23 is fixedly connected with the bottom of the laser etching head 5, and the outer surface of the connecting plate 23 is slidably connected with the inner surface of the sliding groove 22.

[0028] As shown in Figure 4 The two conveying belts 7 form a vacant area, the two water pumps 18 and the etching liquid are located in the vacant area, the bottom of the water tank 2 is penetratingly provided with a drain pipe 6, the surface of the drain pipe 6 is fixedly connected with an electromagnetic control valve, and the etching liquid can be discharged from the inside of the water tank 2 through the drain pipe 6.

[0029] The working principle of the present application is that: first, the etching liquid is poured into the inside of the water tank 2, then the lead frame material is placed on the two conveying belts 7, then the driving mechanism 8 is started to make the driving motor rotate, the driving shaft is driven to rotate through the transmission box, so that the conveying belt 7 conveys the lead frame material, when the lead frame material moves to the top of the top plate 11, at this time the sliding plate 12 slides on the inner surface of the sliding sleeve 10 and the top force spring 13 is compressed by the extension of the electric hydraulic cylinder 9, so as to push the top plate 11 to move upwards, so as to push the lead frame material out of the conveying belt 7 and contact with the bottom of the two pressing plates 14, under the continuous extension of the electric hydraulic cylinder 9, the top force spring 13 is further compressed, and the through hole 15 on the pressing plate 14 slides on the surface of the limiting rod 16, so as to compress the thrust spring 17, so as to fix the lead frame material, at this time the driving mechanism 8 on the mounting frame 3 makes the sliding frame 4 slide downwards on the surface of the mounting frame 3, so as to drive the etching end of the laser etching head 5 to move to one side of the lead frame material, and the etching liquid in the idle area is pumped out by starting the water pump 18, the etching liquid can be sprayed on the surface of the lead frame material by the nozzle 20 communicated with the hose 19, and the connecting plate 23 can slide in the sliding groove 22 by the extension and shortening of the electric telescopic rod 21, so as to drive the laser etching head 5 to slide on the surface of the sliding rail 24, so as to more accurately adjust the relative position of the laser etching head 5 and the lead frame material.

[0030] The above describes one embodiment of the present application in detail, but the above description is only the preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the scope of the present application.

Claims

1. A lead frame etching apparatus comprising a worktable (1), characterized in that, The top of the workbench (1) is fixedly installed with a water tank (2) for placing etching liquid through a supporting block, the top of the workbench (1) is fixedly connected with a mounting rack (3), one side of the mounting rack (3) is slidably connected with a sliding rack (4), the top of the sliding rack (4) is provided with a laser etching head (5) for etching, both sides of the inner wall of the water tank (2) are provided with conveying belts (7) for conveying lead frames, both sides of the inside of the water tank (2) are provided with electric hydraulic cylinders (9) penetratingly, the output ends of the two electric hydraulic cylinders (9) are provided with sliding sleeves (10), the top of the two sliding sleeves (10) is fixedly connected with a top plate (11), both sides of the top of the water tank (2) are provided with pressing plates (14) for pressing the lead frame downward, the etching end of the laser etching head (5) is located above the top plate (11). The output end of the electric hydraulic cylinder (9) is fixedly connected with a sliding plate (12), the outer surface of the sliding plate (12) is slidably connected with the inner surface of the sliding sleeve (10), the top of the sliding plate (12) is fixedly connected with a top force spring (13), the top end of the top force spring (13) is fixedly connected with the bottom of the top plate (11). The top of the pressing plate (14) is provided with penetrating holes (15) penetratingly on both sides, the top of the water tank (2) is fixedly connected with a limiting rod (16) inside the penetrating hole (15), the surface of the limiting rod (16) is sleeved with a thrust spring (17), the bottom end of the thrust spring (17) is fixedly connected with the top of the pressing plate (14).

2. The lead frame etching apparatus according to claim 1, wherein One side of the top of the workbench (1) is fixedly connected with a driving mechanism (8), the driving mechanism (8) is used for driving the two conveying belts (7) to synchronously drive, the driving mechanism (8) comprises a transmission box, the transmission box is fixedly installed on the top of the workbench (1), one side of the transmission box is provided with a driving motor, and a driving shaft penetratingly passes through the transmission box, one end of the driving shaft penetrates through the water tank (2) and is fixedly connected with the driving roller of the conveying belt (7).

3. The lead frame etching apparatus according to claim 1, wherein One side of the pressing plate (14) is provided with a spray head (20) penetratingly for cleaning the lead frame, the bottom of the inner cavity of the water tank (2) is fixedly installed with a water pump (18) on both sides, the water outlet end of the water pump (18) is communicated with a hose (19), one end of the hose (19) is communicated with one end of the spray head (20).

4. The lead frame etching apparatus according to claim 3, wherein The two conveying belts (7) form an empty area, the two water pumps (18) and the etching liquid are located in the empty area, the bottom of the water tank (2) is provided with a liquid discharge pipe (6) penetratingly, the surface of the liquid discharge pipe (6) is fixedly connected with an electromagnetic control valve.

5. The lead frame etching apparatus according to claim 1, wherein Both sides of the top of the sliding rack (4) are fixedly connected with slide rails (24), the outer surfaces of the slide rails (24) are slidably connected with the bottom of the laser etching head (5).

6. The lead frame etching apparatus according to claim 5, wherein The top of the sliding frame (4) is provided with a sliding groove (22), the bottom of the sliding frame (4) is fixedly connected with an electric telescopic rod (21), the top of the laser etching head (5) and inside the sliding groove (22) are fixedly connected with a connecting plate (23), the top of the connecting plate (23) is fixedly connected with the bottom of the laser etching head (5), and the outer surface of the connecting plate (23) is in sliding connection with the inner surface of the sliding groove (22).

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