Surface treatment equipment for lead frame processing

Abstract

The invention belongs to the technical field of lead frame surface treatment, and particularly relates to surface treatment equipment for lead frame machining. Comprising a shell, the shell is fixedly connected with a base, the base is slidably connected with a sliding frame, the sliding frame is detachably connected with a containing box, the shell is slidably connected with an electromagnetic sliding block through an electromagnetic sliding rail, the electromagnetic sliding block is fixedly connected with a first connecting frame, and the shell is slidably connected with a second connecting frame; and the second connecting frame is fixedly connected with an extrusion shell with a one-way valve. The liquid in the shell is controlled to unidirectionally flow around the base by driving the placement box to reciprocate and utilizing the reciprocating motion of the extrusion shell and the one-way valve, so that the lead frame in the placement box moves relative to the liquid, the liquid flushes away impurities of the lead frame, and the probability that the impurities on the surface of the lead frame fall off after being washed is reduced. And the probability that impurities are secondarily adhered to the surfaces of the lead frames due to the fact that two adjacent lead frames are close to each other is reduced, so that the effect of cleaning the surfaces of the lead frames is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of lead frame surface treatment technology, and in particular to a surface treatment device for lead frame processing. Background Technology

[0002] As a key carrier of integrated circuits, the cleanliness of the lead frame directly affects the packaging quality and reliability of the chip. During processing, oil, metal shavings, dust, and other impurities adhere to the surface of the lead frame. If these impurities are not thoroughly removed, they can lead to problems such as poor bonding and inadequate sealing in subsequent processes, seriously affecting product performance. Currently, the mainstream method for cleaning lead frames is ultrasonic cleaning. This method involves immersing the lead frame in a cleaning solution and using the cavitation effect generated by ultrasound in the liquid to impact and peel off impurities on the workpiece surface. It has the advantages of high cleaning efficiency and wide applicability. However, in practical applications, the vibration generated by ultrasound causes the liquid flow to be disordered, and the lead frame is usually a thin sheet structure. To improve efficiency, it is cleaned in batches, and the space between the frames is narrow. The impurities washed off will be suspended in the cleaning solution and re-adhere to the surface of the lead frame with the disordered movement of the liquid, causing secondary pollution and affecting the cleaning effect. Summary of the Invention

[0003] In order to overcome the shortcomings mentioned in the background art, the present invention provides a surface treatment apparatus for lead frame processing.

[0004] Technical Solution: A surface treatment device for processing lead frames includes a housing, a base fixedly connected to the center of the housing to form a liquid flow path within the housing, a sliding frame slidably connected to the base, and a plurality of spaced placement boxes detachably connected to the sliding frame. The housing is provided with symmetrically distributed electromagnetic slide rails, and electromagnetic sliders are slidably connected to the electromagnetic slide rails of the housing. The electromagnetic sliders are fixedly connected to a first connecting frame, which is rotatably connected to the sliding frame. The housing is slidably connected to symmetrically distributed second connecting frames. The housing is provided with symmetrically distributed power components for driving adjacent second connecting frames. The symmetrically distributed second connecting frames are jointly fixedly connected to a pressing shell, which is simultaneously sealed and slidably connected to both the housing and the base. The pressing shell is equipped with a plurality of spaced-apart one-way valves. When the pressing shell reciprocates, the liquid is continuously pushed to all the placement boxes. A filter plate is fixedly connected to the lower side of each one-way valve and is sealed and slidably connected to the base. The filter plate is used to filter impurities in the water.

[0005] Furthermore, it is particularly preferred that the power assembly includes a first rack, the first rack being fixedly connected to an adjacent first connecting frame, the housing being rotatably connected to a first gear, the first gear meshing with the first rack, the first gear being coaxially fixedly connected to a second gear, and the second connecting frame being fixedly connected to a second rack meshing with the second gear, so that when the first connecting frame moves, the second connecting frame moves synchronously and correspondingly.

[0006] Furthermore, it is particularly preferred that the first gear and the second gear have the same module and pressure angle, and that the number of teeth of the second gear is greater than the number of teeth of the first gear, so that the moving distance of the second rack is greater than the moving distance of the first rack.

[0007] Furthermore, it is particularly preferred that the base is provided with a plurality of guide grooves, the guide grooves being inclined downwards at positions away from their center, the sliding frame being fixedly connected with the same number of sliding pins as the guide grooves, the sliding pins sliding within the corresponding guide grooves, and the base being provided with a plurality of pairs of guide surfaces, the guide surfaces being used to guide the sliding frame so as to tilt the sliding frame.

[0008] Furthermore, it is particularly preferred that the placement box is fixedly connected to several sets of fixed frames distributed vertically at intervals, each set of fixed frames having two symmetrically distributed frames, the fixed frames being used to fix the lead frame, the placement box being slidably connected to a baffle, the baffle being used to limit the lead frame, and the baffle being provided with a pressing slope.

[0009] Furthermore, it is particularly preferred that the baffle has the same number of first grooves as the fixed frame, and the fixed frame has two sets of second grooves distributed vertically, each set of second grooves having a number of grooves spaced apart.

[0010] Furthermore, it is particularly preferred that the two sets of second grooves distributed vertically are staggered, and all the second grooves on the two fixed frames in the same set are staggered.

[0011] Furthermore, it is particularly preferred that the placement box is slidably connected to symmetrically distributed first extrusion plates, the fixing frame is slidably connected to the adjacent first extrusion plates, the fixing frame is fixedly connected to the adjacent first extrusion plates with a first elastic element, the baffle is slidably connected to symmetrically distributed second extrusion plates, and the baffle is fixedly connected to the adjacent second extrusion plates with a second elastic element.

[0012] Furthermore, it is particularly preferred that the outer shell has two trigger frames slidably connected, and a third elastic element is fixed between the trigger frames and the outer shell. The two trigger frames are respectively used to compress all the first extrusion plates and all the second extrusion plates. The elastic coefficient of the first elastic element of the first extrusion plate and the elastic coefficient of the second elastic element of the second extrusion plate are both less than the elastic coefficient of the third elastic element of the trigger frame.

[0013] Furthermore, it is particularly preferred that the second groove is provided with symmetrically distributed guide ramps, which are used to guide the lead frame.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention drives the placement box to move back and forth, and uses the reciprocating movement of the extrusion shell and the one-way valve to control the liquid in the shell to flow unidirectionally around the base, so that the lead frame in the placement box moves relative to the liquid. The liquid washes away the impurities of the lead frame, reducing the probability that after the impurities on the surface of the lead frame are washed away, the impurities will re-adhere to the surface of the lead frame due to the close proximity of two adjacent lead frames, thereby ensuring the cleanliness of the lead frame surface. 2. The guide groove and guide surface guide the sliding frame, so that all the boxes on the sliding frame tilt back and forth during the reciprocating movement. This makes the two sides of the lead frame alternately face the liquid source when the lead frame moves, thereby improving the effect of the liquid flushing impurities on the surface of the lead frame and improving the cleaning effect of the lead frame surface. 3. The lead frame is limited by the baffle to reduce the probability of the lead frame sliding out of the placement box during the washing process, thereby increasing the stability of the lead frame during the washing process and reducing the probability of damage to the lead frame. 4. By the flow of liquid relative to the placement box, the first and second extrusion plates move alternately, thereby driving the lead frame to move relative to the corresponding fixed frame. During the movement of the lead frame, the position of the lead frame edge aligned with the corresponding number of second grooves is constantly switched, so that the liquid continuously contacts all parts of the lead frame edge, cleaning the fixed edge of the lead frame, reducing the cleaning dead corners of the lead frame, and thus improving the cleaning effect of the lead frame. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural cross-sectional view of the outer casing of the present invention; Figure 3 This is a three-dimensional structural diagram of the base of the present invention; Figure 4 This is a three-dimensional structural diagram of the extrusion shell, one-way valve, and filter plate of the present invention; Figure 5This is a three-dimensional structural diagram of the placement box of the present invention; Figure 6 This is a three-dimensional structural diagram of the guide surface of the present invention; Figure 7 This is a three-dimensional structural diagram of the baffle of the present invention; Figure 8 This is a three-dimensional structural diagram of the fixing frame of the present invention; Figure 9 This is a three-dimensional structural diagram of the first extrusion plate and the second extrusion plate of the present invention; Figure 10 This is a three-dimensional structural diagram of the guide slope of the present invention.

[0016] In the diagram: 1. Outer shell, 2. Base, 3. Sliding frame, 4. Placement box, 5. Electromagnetic slider, 6. First connecting frame, 7. Second connecting frame, 8. Extrusion shell, 9. One-way valve, 10. Filter plate, 11. First rack, 12. First gear, 13. Second gear, 14. Second rack, 15. Guide groove, 16. Sliding pin, 17. Guide surface, 18. Fixed frame, 19. Baffle, 20. Extrusion slope, 21. First groove, 22. Second groove, 23. First extrusion plate, 24. Second extrusion plate, 2401. Trigger frame, 25. Guide slope. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below.

[0018] Example 1

[0019] Because the vibrations generated by ultrasound cause the liquid to flow in a disordered direction, the impurities washed off will be suspended in the cleaning fluid and will re-adhere to the surface of the lead frame with the disordered movement of the liquid, causing secondary pollution and affecting the cleaning effect.

[0020] A surface treatment apparatus for lead frame processing, such as Figures 1-4 As shown, the device includes a housing 1, a control terminal mounted on the housing 1, and a base 2 fixedly connected to the center of the housing 1. An ultrasonic generator (not shown in the figure) is housed within the base 2 and is electrically connected to the control terminal. The ultrasonic generator is used to create a liquid flow path within the housing 1, with the liquid flow direction being... Figure 1With the left view as the reference, the liquid flows clockwise to flush away impurities on the surface of the lead frame, reducing the probability of impurities re-adhering to the lead frame. The base 2 is slidably connected to a sliding frame 3, which is detachably connected to several spaced placement boxes 4. In this embodiment, the placement boxes 4 are equipped with a fixing structure for securing the lead frame; this fixing structure is an existing structure. The outer shell 1 is equipped with symmetrically distributed electromagnetic slide rails, which are electrically connected to a control terminal. The electromagnetic slide rails of the outer shell 1 are slidably connected to electromagnetic sliders 5, which are fixedly connected to a first connecting frame 6. The first connecting frame 6 is rotatably connected to the sliding frame 3. The electromagnetic sliders 5 are used to drive the sliding frame 3 to move back and forth via the first connecting frame 6. When the sliding frame 3 moves all the placement boxes 4 forward, the liquid inside the outer shell 1 flows clockwise around the base 2, moving forward relative to the placement boxes 4. When the sliding frame 3 moves all the placement boxes 4 backward, the liquid moves forward relative to the placement boxes 4, flushing away impurities on the lead frame inside the placement boxes 4. The outer shell 1 is slidably connected to several symmetrically distributed electromagnetic slide rails 4. The second connecting frame 7 of the cloth has symmetrically distributed power components on the outer shell 1, which are used to drive adjacent second connecting frames 7. The symmetrically distributed second connecting frames 7 are all fixedly connected to the extrusion shell 8. The extrusion shell 8 is simultaneously sealed and slidably connected to the outer shell 1 and the base 2. In a unit time, the water pushing volume when the extrusion shell 8 moves is greater than the sum of the water pushing volume when all parts on the base 2 move. The extrusion shell 8 is equipped with several one-way valves 9 spaced apart. When the sliding frame 3 drives all the placement boxes 4 to move forward, the second connecting frame 7 drives the extrusion shell 8 to move upward. At this time, the one-way valves 9 are closed, and the extrusion shell 8 extrudes the liquid upward, causing the liquid to flow clockwise around the base 2. When the sliding frame 3 drives all the placement boxes 4 to move backward, the second connecting frame 7 drives the extrusion shell 8 to move downward. At this time, the one-way valve 9 is opened, and the liquid on the lower side of the extrusion shell 8 flows to the upper side of the extrusion shell 8. During the reciprocating movement of the extrusion shell 8, the liquid is continuously pushed to all the placement boxes 4. The lower side of the one-way valve 9 is fixedly connected to the filter plate 10, which is sealed and slidably connected to the base 2. The filter plate 10 is used to filter impurities in the water.

[0021] like Figures 1-3As shown, the power assembly includes a first rack 11, which is fixedly connected to an adjacent first connecting frame 6. A first gear 12 is rotatably connected to the housing 1, and the first gear 12 meshes with the first rack 11. A second gear 13 is coaxially fixedly connected to the first gear 12. A second rack 14, which meshes with the second gear 13, is fixedly connected to the second connecting frame 7. When the first connecting frame 6 moves, the first connecting frame 6 drives the first gear 12 to rotate via the first rack 11, and the first gear 12 drives the second rack 14 to rotate via the second gear 13, so that the second connecting frame 7 and the corresponding first connecting frame 6... Synchronous movement is achieved, meaning that when the first connecting frame 6 moves forward, the second connecting frame 7 moves upward. The first gear 12 and the second gear 13 have the same module and pressure angle, and the number of teeth of the second gear 13 is greater than the number of teeth of the first gear 12, so that the moving distance of the second rack 14 is greater than the moving distance of the first rack 11, that is, the moving distance of the second connecting frame 7 is greater than the moving distance of the first connecting frame 6, thereby making the moving distance of the extrusion shell 8 greater than the moving distance of the sliding frame 3 and all the placement boxes 4 on it, thus ensuring that the liquid flows forward relative to the placement box 4 when passing through the placement box 4.

[0022] like Figure 3 , Figure 5 and Figure 6 As shown, the base 2 is provided with several guide grooves 15. The guide grooves 15 are inclined downwards at positions away from the center. The front and rear parts of the guide grooves 15 are both inclined downwards. The sliding frame 3 is fixed with the same number of sliding pins 16 as the guide grooves 15. The sliding pins 16 slide in the corresponding guide grooves 15. The base 2 is provided with several pairs of guide surfaces 17. In each pair of guide surfaces 17, there are two that are symmetrically distributed front and back. The guide surfaces 17 gradually incline downwards from the center to the edge of the base 2. After the sliding frame 3 moves to fit with the guide surface 17, the sliding pins 16 are located at the incline of the guide groove 15. The guide surface 17 guides the sliding frame 3 so that the sliding frame 3 is inclined.

[0023] The specific working principle is as follows: When this device is needed to clean the surface of the lead frame with water, the operator removes the placement box 4, fixes the lead frame in the placement box 4 using the existing fixing structure, then installs the placement box 4 on the sliding frame 3, injects the cleaning fluid into the outer shell 1, and immerses all the lead frames in the cleaning fluid. At this time, the operator turns on the ultrasonic generator through the control terminal to perform ultrasonic water washing on the lead frame.

[0024] During the ultrasonic cleaning of the lead frame, the operator activates the electromagnetic slide rail of the outer shell 1 through the control terminal. The electromagnetic slider 5 drives the sliding frame 3 to move back and forth through the first connecting frame 6. The sliding frame 3 drives all the placement boxes 4 on it to move back and forth. During the back and forth movement of the first connecting frame 6, the first connecting frame 6 drives the second rack 14 to move up and down through the first rack 11, the first gear 12 and the second gear 13. The second rack 14 drives the extrusion shell 8 to move up and down through the second connecting frame 7. That is, when the placement box 4 moves back and forth, the extrusion shell 8 drives the one-way valve 9 and the filter plate 10 to move up and down.

[0025] As the placement box 4 moves forward, the extrusion shell 8 drives the one-way valve 9 and the filter plate 10 to move upward. At this time, the one-way valve 9 is closed. Since the number of teeth of the second gear 13 is greater than the number of teeth of the first gear 12, and the amount of water pushed by the extrusion shell 8 when it moves is greater than the sum of the amount of water pushed by all the parts on the base 2 when they move, the distance that the extrusion shell 8 moves is greater than the distance that the placement box 4 moves. This causes the liquid to flow forward relative to the placement box 4 when it passes through the placement box 4, and the liquid washes the two sides of the lead frame inside the placement box 4.

[0026] When the placement box 4 moves backward, the one-way valve 9 opens, and the extrusion shell 8 drives the one-way valve 9 and the filter plate 10 to move downward. The liquid under the filter plate 10 is filtered by the filter plate 10 and flows to the upper side of the extrusion shell 8. The placement box 4 drives the lead frame to move backward relative to the liquid, so that the liquid still flows forward to wash the surface of the lead frame, washing away the impurities washed off the surface of the lead frame, thereby reducing the probability that the washed-off impurities will remain between two adjacent lead frames, thus reducing the probability that impurities will re-adhere to the surface of the lead frame, and thus improving the cleaning effect of the lead frame.

[0027] As the sliding frame 3 moves all the placement boxes 4 back and forth, when the sliding frame 3 moves to fit with the guide surface 17, the sliding pin 16 is located in the inclined part of the guide groove 15. As the sliding frame 3 continues to move, the sliding frame 3 gradually tilts, causing all the placement boxes 4 and their inner lead frames to gradually tilt. Since the front and rear parts of the guide groove 15 are both inclined downwards, and each pair of adjacent guide surfaces 17 are symmetrically distributed front and back, the guide surfaces 17 gradually tilt downwards from the middle to the edge of the base 2. Therefore, when the placement box 4 moves backwards, its rear side tilts downwards, and when the placement box 4 moves forwards, its front side tilts downwards. This causes the upper and lower sides of the lead frame to alternately face the source of the flowing liquid during the movement, thereby improving the effect of the liquid rinsing the surface of the lead frame and thus improving the cleaning effect of the lead frame surface.

[0028] After the lead frame surface treatment is completed, the operator turns off the ultrasonic generator and the electromagnetic slide rail of the housing 1 through the control terminal, then drains the cleaning fluid from the housing 1, removes the placement box 4, collects the cleaned lead frame, and finally puts it back into the placement box 4.

[0029] Example 2

[0030] Based on Example 1, such as Figures 7-10 As shown, the placement box 4 is fixedly connected with several sets of fixed frames 18 spaced vertically. In the above embodiment, the lead frame is fixed by an existing fixing structure. In this embodiment, the lead frame is fixed by the fixed frames 18. Each set of fixed frames 18 has two symmetrically distributed frames. The lead frame is inserted into the two fixed frames 18 in the same set from the rear, and the lead frame is fixed by the two fixed frames 18 in the same set. The placement box 4 is slidably connected with a baffle 19. When it is necessary to fix the lead frame, the baffle 19 is moved upward until it no longer obstructs the fixed frames in the adjacent placement box 4. After the fixed frame 18 is fixed, multiple lead frames are inserted into the corresponding two fixed frames 18 respectively. Then, the baffle 19 is moved downward to reset the baffle 19. After the baffle 19 is reset, the baffle 19 limits the lead frame to reduce the probability of the lead frame sliding out of the placement box 4 during the water washing process, thereby increasing the stability of the lead frame during the water washing process and reducing the probability of damage to the lead frame. The baffle 19 is provided with a pressing slope 20. During the downward movement of the baffle 19, if the lead frame is not fully inserted into the corresponding fixed frame 18, the pressing slope 20 will squeeze the lead frame into the corresponding fixed frame 18.

[0031] Example 3

[0032] When performing ultrasonic cleaning, the edges of existing lead frames need to be fixed, which can lead to cleaning dead corners at the edges of the lead frames, thus affecting the cleaning effect.

[0033] Based on Example 2, such as Figure 9 and Figure 10 As shown, the baffle 19 is provided with the same number of first grooves 21 as the fixed frame 18. The first grooves 21 are aligned with the adjacent fixed frames 18 to provide a small range of movement space for the lead frame. The fixed frame 18 is provided with two sets of second grooves 22 distributed vertically. Each set of second grooves 22 has several grooves distributed at intervals. The two sets of second grooves 22 are staggered. All the second grooves 22 on the two fixed frames 18 in the same set are staggered. During the movement of the lead frame relative to the corresponding fixed frame 18, the position of the lead frame edge aligned with the corresponding number of second grooves 22 is constantly changing, so that the liquid continuously contacts all parts of the lead frame edge.

[0034] like Figure 2and Figures 8-10 As shown, the placement box 4 is slidably connected to symmetrically distributed first extrusion plates 23. The fixing frame 18 is slidably connected to the adjacent first extrusion plates 23. A first elastic element, which is a compression spring, is fixed between the fixing frame 18 and the adjacent first extrusion plates 23. The stop frame 19 is slidably connected to symmetrically distributed second extrusion plates 24. The second extrusion plates 24 are inserted into several corresponding first grooves 21, and the first extrusion plates 23 are inserted into several corresponding fixing frames 18. When the first extrusion plates 23 and 24 move, they push the lead frame to move. A second elastic element, which is a compression spring, is fixed between the stop frame 19 and the adjacent second extrusion plates 24. The outer shell 1 is slidably connected to two triggers, one at the front and one at the back. A third elastic element, a compression spring, is fixed between the trigger frame 2401 and the outer casing 1. The two trigger frames 2401 respectively compress all the first compression plates 23 and all the second compression plates 24. The elastic coefficients of the first elastic elements of the first compression plates 23 and the second elastic elements of the second compression plates 24 are both less than the elastic coefficient of the third elastic element of the trigger frame 2401. When the placement box 4 moves forward, the two first compression plates 23 are compressed by the adjacent trigger frames 2401, causing the first elastic elements to be compressed. The two first compression plates 23 compress all the lead frames within the adjacent placement box 4, causing the lead frames to move backward relative to the placement box 4. When the first elastic element is compressed to its limit... After the initial state, the first compression plate 23 continues to move forward and compresses the adjacent trigger frame 2401, compressing the corresponding third elastic element. When the placement box 4 moves backward, the third elastic element of the front trigger frame 2401 rebounds, the first elastic element rebounds, and the two second compression plates 24 are compressed by the adjacent trigger frame 2401, compressing the second elastic element. The two second compression plates 24 compress all the lead frames in the adjacent placement box 4, causing the lead frames and the first compression plate 23 to move forward relative to the placement box 4. When the second elastic element is compressed to its limit, the second compression plate 24 continues to move and compress the adjacent trigger frame 2401, compressing the third elastic element of the rear trigger frame 2401, accompanied by the reciprocating motion of the placement box 4. The movement causes the lead frame to move back and forth continuously, and the position of the lead frame edge aligned with the corresponding number of second grooves 22 changes continuously, so that the liquid continuously contacts all parts of the lead frame edge, cleaning the fixed edge of the lead frame, reducing the cleaning dead corners of the lead frame, and thus improving the cleaning effect of the lead frame. The second groove 22 is provided with symmetrically distributed guide slopes 25. During the movement of the lead frame within the corresponding fixed frame 18, the guide slopes 25 guide the lead frame, so that when the lead frame bends, it moves along the guide slopes 25, straightening the lead frame, thereby reducing the probability of bending or even damage from pressure when the lead frame is inserted into the fixed frame 18.

[0035] In summary, the invention includes, but is not limited to, the above embodiments. Any equivalent substitutions or partial improvements made under the spirit and principles of this invention shall be considered to be within the protection scope of this invention.

Claims

1. A surface treatment apparatus for processing lead frames, comprising a housing (1), characterized in that, A base (2) is fixedly connected to the center of the outer shell (1) to form a liquid flow path within the outer shell (1). The base (2) is slidably connected to a sliding frame (3). The sliding frame (3) is detachably connected to several spaced placement boxes (4). The outer shell (1) is provided with symmetrically distributed electromagnetic slide rails. The electromagnetic slide rails of the outer shell (1) are slidably connected to electromagnetic sliders (5). The electromagnetic sliders (5) are fixedly connected to a first connecting frame (6). The first connecting frame (6) is rotatably connected to the sliding frame (3). The outer shell (1) is slidably connected to symmetrically distributed second connecting frames (7). The upper part is provided with symmetrically distributed power components for driving adjacent second connecting frames (7). The symmetrically distributed second connecting frames (7) are jointly fixed to a squeezing shell (8). The squeezing shell (8) is simultaneously sealed and slidably connected to the outer shell (1) and the base (2). The squeezing shell (8) is equipped with several one-way valves (9) spaced apart. When the squeezing shell (8) moves back and forth, the liquid is continuously pushed to all the placement boxes (4). The lower side of the one-way valve (9) is fixed to a filter plate (10) that is sealed and slidably connected to the base (2). The filter plate (10) is used to filter impurities in the water.

2. A surface treatment apparatus for processing lead frames according to claim 1, characterized in that, The power assembly includes a first rack (11), which is fixedly connected to an adjacent first connecting frame (6). The housing (1) is rotatably connected to a first gear (12), which meshes with the first rack (11). The first gear (12) is coaxially fixedly connected to a second gear (13). The second connecting frame (7) is fixedly connected to a second rack (14) that meshes with the second gear (13), so that when the first connecting frame (6) moves, the second connecting frame (7) moves synchronously.

3. A surface treatment apparatus for processing lead frames according to claim 2, characterized in that, The first gear (12) and the second gear (13) have the same module and pressure angle. The number of teeth of the second gear (13) is greater than the number of teeth of the first gear (12), so that the moving distance of the second rack (14) is greater than the moving distance of the first rack (11).

4. A surface treatment apparatus for processing lead frames according to claim 1, characterized in that, The base (2) is provided with a plurality of guide grooves (15), the guide grooves (15) are inclined downward away from the center, the sliding frame (3) is fixed with the same number of sliding pins (16) as the guide grooves (15), the sliding pins (16) slide in the corresponding guide grooves (15), the base (2) is provided with a plurality of pairs of guide surfaces (17), the guide surfaces (17) are used to guide the sliding frame (3) so that the sliding frame (3) is inclined.

5. A surface treatment apparatus for processing lead frames according to claim 1, characterized in that, The placement box (4) is fixedly connected to several sets of fixed frames (18) spaced apart vertically. Each set of fixed frames (18) has two symmetrically distributed frames. The fixed frames (18) are used to fix the lead frame. The placement box (4) is slidably connected to a baffle (19). The baffle (19) is used to limit the lead frame. The baffle (19) is provided with a pressing slope (20).

6. A surface treatment apparatus for processing lead frames according to claim 5, characterized in that, The baffle (19) is provided with the same number of first grooves (21) as the fixed frame (18). The fixed frame (18) is provided with two sets of second grooves (22) distributed vertically. Each set of second grooves (22) has several grooves distributed at intervals.

7. A surface treatment apparatus for processing lead frames according to claim 6, characterized in that, The two sets of second grooves (22) distributed vertically are staggered, and all the second grooves (22) on the two fixed frames (18) in the same set are staggered.

8. A surface treatment apparatus for processing lead frames according to claim 7, characterized in that, The placement box (4) is slidably connected to symmetrically distributed first extrusion plates (23), the fixing frame (18) is slidably connected to the adjacent first extrusion plate (23), the fixing frame (18) is fixedly connected to the adjacent first extrusion plate (23) with a first elastic element, the baffle (19) is slidably connected to symmetrically distributed second extrusion plates (24), and the baffle (19) is fixedly connected to the adjacent second extrusion plate (24) with a second elastic element.

9. A surface treatment apparatus for processing lead frames according to claim 8, characterized in that, The outer shell (1) is slidably connected to two trigger frames (2401). A third elastic element is fixed between the trigger frame (2401) and the outer shell (1). The two trigger frames (2401) are used to press all the first extrusion plates (23) and all the second extrusion plates (24). The elastic coefficient of the first elastic element of the first extrusion plate (23) and the elastic coefficient of the second elastic element of the second extrusion plate (24) are both less than the elastic coefficient of the third elastic element of the trigger frame (2401).

10. A surface treatment apparatus for processing lead frames according to claim 7, characterized in that, The second groove (22) is provided with symmetrically distributed guide slopes (25), which are used to guide the lead frame.

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