Lead frame excessive glue removing device

Abstract

The utility model provides a lead frame excessive glue removing device, which relates to the field of lead frame production, and adopts the technical scheme that the lead frame excessive glue removing device comprises a punching machine body and further comprises an upper die assembly and a bearing plate, the upper die assembly is detachably connected with the bearing plate, the upper die assembly comprises a punching cutter, and the lower part of the punching cutter is provided with a comb tooth structure used for punching areas on two sides of a pin of a lead frame; the lower die assembly comprises a lower fixing plate, a supporting block is arranged on the lower fixing plate, the supporting block and the corresponding stamping cutter are oppositely arranged, and a comb tooth structure used for supporting a lead frame pin is arranged on one side of the upper portion of the supporting block in a protruding mode; containing grooves are formed in the contact surfaces of the lower fixing plate and the upper die assembly and used for containing a plastic package body in the middle area of the lead frame. The device can replace a chemical solution soaking method and manual operation to remove excessive glue on the two sides of a pin, is high in removal efficiency and automation level, and does not damage a lead frame.

Description

TECHNICAL FIELD

[0001] The utility model relates to the production field of lead frame, especially to a lead frame glue overflow removing device. BACKGROUND

[0002] The lead frame is a kind of important structural material in semiconductor packaging, and mainly plays the role of bridge connecting the internal circuit of chip and external wire. After the semiconductor product is completed plastic package, the glue overflow phenomenon inevitably occurs on the pin side of lead frame, and the glue overflow can greatly affect the quality of lead frame, so the excess glue needs to be removed. The overflow removing method includes electrolytic method and mechanical method, the mechanical method is rarely used because the spray medium used can damage the substrate, and the electrolytic method is greatly limited because the electrolytic voltage or current is too high to damage the chip and cause delamination, and some serious glue overflow cannot be removed.

[0003] In the prior art, the commonly used glue overflow removing method is chemical solution immersion method, the chemical solution immersion method is to intermittently put the lead frame to be processed in a perforated stainless steel box, and then put it into the immersion tank for immersion for 30 minutes to 1 hour or more, take it out after immersion, put it into the water tank for cleaning, take it out again and place it for subsequent high-pressure water jet spraying, high-pressure water jet spraying, air knife drying, electric heating drying and material collection to complete the whole glue overflow removing process.

[0004] In the chemical solution immersion method, the operator needs to take out the material strip and manually load it one by one, the whole process is complicated and labor-consuming, and the operation environment is poor due to high temperature, drug odor, and the carrying out or overflowing of drug solution and washing water in the immersion tank and washing tank, which also increases the loss of drug solution and the amount of wastewater. If the overflow glue is removed by hand using the corresponding tool, on the one hand, the efficiency is low, and on the other hand, due to the limitation of operation space, the overflow glue on the pin side cannot be removed. UTILITY MODEL CONTENTS

[0005] In order to solve the technical problems of low efficiency and difficulty in removing the overflow glue on the pin side of the etched lead frame in the prior art, the utility model provides a lead frame glue overflow removing device, which can replace the chemical solution immersion method and manually remove the overflow glue on both sides of the pin, has high removing efficiency and high automation level, and does not harm the lead frame.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a lead frame excess adhesive removal device, including a stamping machine body, the stamping machine body including a support plate and a worktable, the support plate being capable of reciprocating up and down, and further including: an upper die assembly, the upper die assembly being detachably connected to the support plate, the upper die assembly including a stamping knife, the lower part of the stamping knife being provided with a comb tooth structure for stamping the pin areas on both sides of the lead frame; a lower die assembly, the lower die assembly including a lower fixed plate, the lower fixed plate being provided with a support block, the support block being disposed opposite to the corresponding stamping knife, the upper side of the support block being provided with a comb tooth structure for supporting the lead frame pins; the surfaces of the lower fixed plate and the upper die assembly that contact each other are provided with receiving grooves, the receiving grooves being used to receive the plastic sealant in the middle area of ​​the lead frame; the support block and the stamping knife are both provided with the edges of the corresponding receiving grooves and arranged according to the pin layout of the lead frame.

[0007] This invention removes excess glue from both sides of the pins by stamping through the cooperation of the stamping machine body, upper die assembly and lower die assembly. The pins are supported and protected by the support block, which does not damage the pin structure. It is not limited by the operating space, has fewer steps, high removal efficiency, high level of automation, low labor intensity and fast processing efficiency.

[0008] Furthermore, the upper mold assembly also includes a cover plate and a tool mounting plate. The cover plate is disposed on the upper part of the tool mounting plate. A positioning block is disposed on the upper part of the stamping tool. The tool mounting plate is provided with a tool mounting hole. A fixing block is disposed in the tool mounting hole. A tool bolt is screwed onto the cover plate. The tool bolt passes through the positioning block downward and connects to the fixing block. The fixing block is located below the positioning block and abuts against the positioning block.

[0009] This invention allows for the detachable mounting of the stamping cutter on a cutter mounting plate, enabling direct replacement of the cutter after deformation or damage without the need to replace other related components, resulting in low usage and maintenance costs.

[0010] Furthermore, the lower fixing plate is provided with a support mounting hole at the edge of the receiving groove, the support mounting hole is connected to the receiving groove, the support block is provided in the support mounting hole, and a pressure plate is screwed to the lower part of the support block, the pressure plate is screwed to the lower fixing plate.

[0011] This invention makes the support block detachable, allowing for replacement of the support block after deformation or damage without replacing other parts, resulting in low usage and maintenance costs.

[0012] Further, the upper die assembly further comprises an upper fixed plate, the upper fixed plate is arranged at the lower part of the cutter mounting plate, the lower surface of the upper fixed plate is provided with a containing groove, the cutter mounting plate can move up and down relative to the upper fixed plate, the upper fixed plate is provided with a guide hole at the edge of the containing groove, the stamping cutter can extend out of the guide hole, a cutter guide block is arranged in the guide hole, and the cutter guide block can be attached to the stamping cutter.

[0013] The cutter guide block and the cutter mounting plate can move up and down relative to the upper fixed plate, the stamping action of the stamping cutter can be separated from the mold closing process, a good guiding effect is provided, the stamping cutter is prevented from being impacted during the mold closing process, and the service life is affected.

[0014] Further, the upper fixed plate is screwed with a guide rod, the guide rod can move up and down and penetrates the cutter mounting plate, the upper end of the guide rod is provided with a limiting seat, the limiting seat can move up and down and is arranged in the cover plate, a return spring is arranged between the limiting seat and the bearing plate, and the upper surface of the upper fixed plate is provided with a limiting column.

[0015] The guide rod and the return spring realize the floating connection of the cutter mounting plate and the upper fixed plate, and the needs of simultaneous movement and independent movement of the cutter fixed plate can be met.

[0016] Further, the lower part of the cutter guide block is provided with a comb tooth structure, the comb tooth structure of the cutter guide block is arranged opposite to the comb tooth structure of the corresponding support block in up and down directions, and the comb tooth structure of the stamping cutter can penetrate the comb tooth structure of the cutter guide block and reach the comb tooth structure of the support block.

[0017] The comb tooth structure is arranged at the lower part of the cutter guide block, the guiding distance of the stamping cutter can be prolonged on the one hand, and the comb tooth structure on the support block can be matched on the other hand, the pin structure is pressed better, the deformation of the pin during stamping is prevented, and the manufacturing precision of the lead frame is affected.

[0018] Further, the guide hole of the upper fixed plate is provided with a step, the upper part of the cutter guide block is provided with a limiting block, the lower surface of the limiting block can be in contact with the upper surface of the step, the upper fixed plate is screwed with a baffle, and the baffle can be in contact with the upper surface of the limiting block.

[0019] The step, the limiting block and the baffle are matched to realize detachable installation of the cutter guide block, the corresponding cutter guide block can be replaced after deformation or damage of the cutter guide block, other components need not to be replaced, and the use and maintenance cost is low.

[0020] Further, the plurality of support blocks share one pressing plate, and a flow chip groove is arranged on the pressing plate at a position corresponding to the accommodating groove, and the flow chip groove is communicated with the support mounting hole.

[0021] Further, the flow chip groove comprises a guiding part and a collecting part which are communicated, and the guiding part is in a ladder structure with a wide end upward.

[0022] The guiding part can facilitate the collection of the cutting chips.

[0023] Further, the cutter mounting plate edge protrudes from the cover plate, a hanging rod is arranged on the bearing plate, the hanging rod is in an L-shaped structure, the cutter mounting plate edge is arranged on the hanging rod, and the cover plate is in contact with the lower surface of the bearing plate.

[0024] The upper die assembly is installed in a hanging mode, and the installation efficiency is improved.

[0025] From the above technical solution, the utility model has the following advantages:

[0026] The utility model provides a kind of lead frame overflow glue removal device, by the cooperation of punch press body, upper die assembly and lower die assembly, in the way of stamping, remove overflow glue on both sides of pin, and by support block, support protection to pin is realized, will not damage pin structure, not limited by operating space, less work step, removal efficiency is high, automation level is high, labor intensity is lower, processing efficiency is fast;By detachably installing stamping cutter on cutter mounting plate, cutter can be directly replaced after stamping cutter deformation or damage without needing to replace other related components, and use and maintenance cost is low;By setting support block into detachable, corresponding support block can be replaced after support block deformation or damage without needing to replace other components, and use and maintenance cost is low;By setting cutter guiding block and cutter mounting plate can be relatively moved up and down on upper fixed plate, the stamping action of stamping cutter can be separated from the process of die closing, and good guiding effect is provided, avoid stamping cutter from being impacted in the process of die closing, affect service life;By guiding rod and return spring, floating connection of cutter mounting plate and upper fixed plate is realized, the need of simultaneous movement and cutter fixed plate independent movement can be met;By setting comb structure in lower part of cutter guiding block, on the one hand, guiding distance of stamping cutter can be extended, and on the other hand, comb structure on support block can be cooperated, better press pin structure, prevent pin from deforming when stamping, affect the manufacturing precision of lead frame;By the cooperation of step, limit block and baffle, detachable installation of cutter guiding block is realized, corresponding cutter guiding block can be replaced after cutter guiding block deformation or damage without needing to replace other components, and use and maintenance cost is low;By setting guiding part, cutting chips can be easily collected;Upper die assembly is installed in a hanging mode, and installation efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the structure schematic view of the upper die assembly and the lower die assembly in the die separation state of the embodiment one of the utility model.

[0028] Figure 2 It is the structure schematic view of the upper die assembly and the lower die assembly in the die separation state of the embodiment one of the utility model.

[0029] Figure 3 It is the structure schematic view of the upper die assembly in the embodiment one of the utility model.

[0030] Figure 4 It is the structure schematic view of the stamping knife in the embodiment one of the utility model.

[0031] Figure 5 It is the structure schematic view of the tool mounting plate in the embodiment one of the utility model.

[0032] Figure 6 It is the structure schematic view of the lower die assembly in the embodiment one of the utility model.

[0033] Figure 7 It is the structure schematic view of the tool guide block in the embodiment one of the utility model.

[0034] Figure 8 It is the structure schematic view of the lower fixed plate in the embodiment one of the utility model.

[0035] Figure 9 It is the structure schematic view of the pressing plate in the embodiment one of the utility model.

[0036] Figure 10 It is the structure schematic view of the embodiment two of the utility model.

[0037] Figure 11 It is the structure schematic view of the upper die assembly and the lower die assembly in the die separation state of the embodiment two of the utility model.

[0038] Figure 12 It is the structure schematic view of the reset spring, the upper die assembly and the lower die assembly in the die closing state of the embodiment two of the utility model.

[0039] Figure 13 It is the structure schematic view of the upper die assembly and the lower die assembly in the stamping state of the embodiment two of the utility model.

[0040] Figure 14 It is the structure schematic view of the upper die assembly in the embodiment two of the utility model.

[0041] Figure 15 It is the assembly structure schematic view of the stamping knife, the tool guide block and the upper fixed plate in the embodiment two of the utility model.

[0042] Figure 16 It is the structure schematic view of the tool guiding block in the second embodiment of the utility model.

[0043] Figure 17 It is the assembly structure schematic view of the stamping tool, the tool guiding block and the supporting block in the second embodiment of the utility model under the stamping state

[0044] In the figure, 1, the bearing plate; 3, the hanging rod; 4, the lower die assembly; 401, the lower fixed plate; 402, the pressing plate; 403, the supporting block; 404, the positioning needle; 405, the guide sleeve; 406, the guiding portion; 407, the collection portion; 408, the supporting mounting hole; 5, the upper die assembly; 501, the cover plate; 502, the tool mounting plate; 503, the upper fixed plate; 504, the limiting column; 506, the guide rod; 507, the limiting seat; 508, the guide column; 510, the tool guiding block; 511, the stamping tool; 512, the boss; 513, the tool mounting hole; 8, the lifting driving assembly; 9, the reset spring; 11, the containing groove. DETAILED DESCRIPTION

[0045] In order to make the purpose, the features, the advantages of the utility model can be more obvious and easy to understand, the following will combine the figure in the specific embodiment, the technical scheme in the utility model is clearly and completely described, obviously, the following described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the patent, all other embodiments obtained by the person skilled in the art without making creative labor are within the scope of the patent protection.

[0046] Embodiment one

[0047] As Figures 1 to 4 , Figure 6 and Figure 7As shown, the embodiment provides a lead frame glue overflow removing device, which comprises a punch press body, a lower die assembly 4 and an upper die assembly 5. The punch press body comprises a bearing plate 1 and a workbench. The bearing plate 1 is connected with a lifting driving assembly 8 in the form of a motor + lead screw. The bearing plate 1 can move up and down reciprocally. The upper die assembly 5 is detachably connected with the bearing plate 1. The upper die assembly 5 comprises a cutter mounting plate 502, and the cutter mounting plate 502 is provided with a punch cutter 511. The punch cutter 511 is provided with a comb structure at the lower part for punching the lead frame pin side area. The bearing plate 1 can drive the punch cutter 511 to move up and down to remove the glue overflow on both sides of the pin. The lower die assembly 4 comprises a lower fixed plate 401, and the lower fixed plate 401 is provided with a support block 403. The support block 403 is oppositely arranged with the corresponding punch cutter 511. The support block 403 is provided with a comb structure on one side of the upper part for supporting the lead frame pin. The corresponding positions of the contact surfaces (in this embodiment, the upper surface of the lower fixed plate 401 and the lower surface of the cutter mounting plate 502) of the lower fixed plate 401 and the upper die assembly 5 are provided with accommodating grooves 11 for accommodating the plastic package body in the middle area of the lead frame. The support block 403 and the punch cutter 511 are arranged according to the layout of the lead frame pin around the edge of the corresponding accommodating groove 11. In this embodiment, a row of pins is arranged around the lead frame. Correspondingly, the support block 403 and the punch cutter 511 are arranged around the accommodating groove 11. The number of teeth of the punch cutter 511 comb structure is one more than the number of pins in each row, and the number of teeth of the support block 403 comb structure is the same as the number of pins in each row.

[0048] The embodiment removes the glue overflow on both sides of the pin in the form of punching through the cooperation of the punch press body, the upper die assembly 5 and the lower die assembly 4. The comb structure of the support block 403 realizes the support and protection of the pin without damaging the pin structure and is not limited by the operation space. Compared with chemical soaking, the number of steps is less, the removal efficiency is high, the automation level is high, the labor intensity is low, and the processing efficiency is fast.

[0049] As Figure 3 , Figures 5 to 8As shown, since the punching knives 511 and the support blocks 403 are both provided with multiple punching knives 511 and support blocks 403 according to the arrangement of the pins, in order to replace the corresponding parts after the punching knives 511 or the support blocks 403 are damaged, and avoid that other intact parts also need to be replaced, in the embodiment, the punching knives 511 and the support blocks 403 are both provided to be detachable; specifically, the upper die assembly 5 further comprises a cover plate 501, the cover plate 501 is provided on the upper part of the tool mounting plate 502 through bolts, the upper part of one side of the punching knife 511 is provided with a positioning block, the tool mounting plate 502 is provided with a tool mounting hole 513, a boss 512 is provided on the inner wall of the upper part of one side of the tool mounting hole 513, the positioning block of the punching knife 511 can be placed on the boss 512, a fixing block can be further movably arranged in the tool mounting hole 513, the fixing block is provided with a threaded hole, the tool bolt is screwed on the cover plate 501, the tool bolt is connected with the fixing block after penetrating downward through the positioning block, and the fixing block is located below the boss 512 and abuts against the boss 512; the support mounting hole 408 is in communication with the accommodating groove 11, the support block 403 is arranged in the support mounting hole 408, the pressing plate 402 is screwed on the lower part of the support block 403, and the pressing plate 402 is screwed with the lower fixed plate 401.

[0050] As shown in Figure 9 , in order to facilitate chip collection, multiple support blocks 403 share one pressing plate 402, a chip flow groove is arranged on the pressing plate 402 at a position corresponding to the accommodating groove 11, the chip flow groove is in communication with the support mounting hole 408, and the chip flow groove comprises a guide portion 406 and a collection portion 407 which are in communication, the guide portion 406 has a ladder structure with a wide end upward, and the guide portion 406 can facilitate chip collection.

[0051] As shown in Figure 1 , in order to facilitate the installation of the upper die assembly 5, the edge of the tool mounting plate 502 protrudes from the cover plate 501, the hanging rod 3 is arranged on the bearing plate 1 and has an L-shaped structure, the edge of the tool mounting plate 502 is placed on the hanging rod 3, and the cover plate 501 abuts against the lower surface of the bearing plate 1 to realize positioning; the other two sides of the bearing plate 1 are further provided with limiting plates which abut against the corresponding sides of the upper die assembly 5; the bearing plate 1 and the cover plate 501 are positioned by large surface contact, and the stress is uniform.

[0052] In the embodiment, the lower die assembly 4 is arranged on the workbench through a clamp.

[0053] As shown in Figure 2 and Figure 3 , in order to accurately position, the guide column 508 is arranged on the tool mounting plate 502 and extends from the inner part of the upper fixed plate 503, the guide sleeve 405 is arranged on the lower fixed plate 401, and the positioning needle 404 is further arranged on the lower fixed plate 401; the positioning hole is arranged on the upper fixed plate 503.

[0054] Example Two

[0055] As Figures 10 to 15As shown, the structure of the embodiment is basically the same as that of the first embodiment, and the difference lies in that: since the size of the pin in the prior art is small, the size of the tooth of the corresponding punching knife 511 comb tooth structure is narrow and the strength is low, in order to avoid the adverse effects of punching on the punching knife 511, in the embodiment, the upper die assembly 5 further comprises an upper fixed plate 503, the upper fixed plate 503 is arranged at the lower part of the tool mounting plate 502, the upper fixed plate 503 is attached to the lower fixed plate 401 during punching, therefore, the lower surface of the upper fixed plate 503 is provided with a receiving groove 11, the tool mounting plate 502 is not provided with the receiving groove 11, and the tool mounting plate 502 can move up and down relative to the upper fixed plate 503, the upper fixed plate 503 is provided with a guide hole at the edge of the receiving groove 11, the punching knife 511 can extend from the guide hole, and the tool guide block 510 is further arranged in the guide hole of the upper fixed plate 503, the tool guide block 510 can be attached to the punching knife 511; by arranging the tool mounting plate 502 and the upper fixed plate 503 to be movable relative to each other, the punching knife 511 can be controlled to be located inside the upper fixed plate 503 and not to extend out during mold closing (the process of attaching the upper die assembly 5 and the lower die assembly 4), when the mold is closed, the tool mounting plate 502 drives the punching knife 511 to move downward to achieve extension, and the tool guide block 510 plays a guiding role for the punching knife 511, which can greatly avoid the punching knife 511 from being impacted during mold closing, thereby prolonging the service life of the punching knife 511; in order to realize the up and down movement of the tool mounting plate 502 relative to the upper fixed plate 503, the upper fixed plate 503 is screwed with a guide rod 506, the guide rod 506 can move up and down through the guide hole of the tool mounting plate 502, a guide sleeve is arranged in the guide hole of the tool mounting plate 502, the guide sleeve can move relative to the guide rod 506, the upper end of the guide rod 506 is provided with a limiting seat 507, both of which form a T-shaped structure, a limiting sleeve is arranged in the cover plate 501, the limiting seat 507 is arranged in the limiting sleeve, the inner hole of the limiting sleeve is a stepped hole, the boss of the inner hole of the limiting sleeve can abut against the lower surface of the limiting seat 507 to realize limiting, the limiting seat 507 and the guide rod 506 are movably arranged in the limiting sleeve of the cover plate 501, a return spring 9 is arranged between the limiting seat 507 and the bearing plate 1, and a limiting column 504 is arranged on the upper surface of the upper fixed plate 503; through the action of the return spring 9, the guide rod 506 and the limiting seat 507, the floating connection of the tool mounting plate 502 and the upper fixed plate 503 is realized.When the bearing plate 1 drives the upper die assembly 5 to move downward, the upper fixed plate 503 is close to the lower fixed plate 401 to perform die closing, after die closing is completed, the bearing plate 1 continuously drives the cutter mounting plate 502 to move downward, the upper fixed plate 503 remains stationary, the reset spring 9 is continuously compressed, the cutter mounting plate 502 moves downward along the guide rod 506, the stamping cutter 511 moves downward relative to the cutter guide block 510 and extends to perform stamping, until the cutter mounting plate 502 abuts against the limiting column 504, at this time, the stamping cutter 511 is moved to the position of stamping completion, the bearing plate 1 moves upward, drives the cutter mounting plate 502 to move upward along the guide rod 506, the stamping cutter 511 resets, and the length of the reset spring 9 is lengthened, when the bearing plate 1 continues to move upward, the limiting seat 507 falls back into the limiting sleeve and gradually abuts against the limiting sleeve under the action of gravity of the upper fixed plate 503, when the bearing plate 1 continues to move upward, the upper fixed plate 503 can be driven to move upward to open the mold.

[0056] As shown in Figure 16 and Figure 17 In the embodiment, the lower side of the cutter guide block 510 is provided with a comb structure, the comb structure of the cutter guide block 510 is arranged opposite to the comb structure of the corresponding supporting block 403, and the comb structure of the stamping cutter 511 can penetrate through the comb structure of the cutter guide block 510 and reach the comb structure of the supporting block 403; by arranging the comb structure on the lower part of the cutter guide block 510, on the one hand, the guiding distance of the stamping cutter 511 can be lengthened, and on the other hand, the comb structure on the supporting block 403 can be matched to better compress the pin structure and prevent the pin from being deformed during stamping, thereby affecting the manufacturing precision of the lead frame.

[0057] In the embodiment, the inner wall of the guide hole of the upper fixed plate 503 is provided with a step, the upper side of the cutter guide block 510 is provided with a limiting block, the lower surface of the limiting block can be in contact with the upper surface of the step, and the upper fixed plate 503 is screwed with a baffle, and the baffle can be in contact with the upper surface of the limiting block; by matching the step, the limiting block and the baffle, the cutter guide block 510 can be detachably installed, so that when the cutter guide block 510 is deformed or damaged, the corresponding cutter guide block 510 can be replaced without replacing other components, thereby reducing the use and maintenance cost.

[0058] As shown in Figure 10 In the embodiment, the edge of the cutter mounting plate 502 protrudes from the upper fixed plate 503, and the edge of the cutter mounting plate 502 is located in the hanging rod 3.

[0059] From the above embodiment, it can be seen that the utility model has the following beneficial effects:

[0060] 1. By the cooperation of the punch body, the upper die assembly 5 and the lower die assembly 4, the excess glue on both sides of the pin is removed in a punching manner, and the support and protection of the pin are realized by the comb structure of the support block 403, without damaging the pin structure and being limited by the operation space, compared with chemical soaking, the number of steps is less, the removal efficiency is high, the automation level is high, the labor intensity is lower, and the processing efficiency is fast;

[0061] 2. By detachably mounting the punching knife 511 on the tool mounting plate 502, the tool can be directly replaced after the punching knife 511 is deformed or damaged, without the need to replace other related parts, and the use and maintenance cost is low;

[0062] 3. By setting the support block 403 to be detachable, the corresponding support block 403 can be replaced after the support block 403 is deformed or damaged, without the need to replace other parts, and the use and maintenance cost is low;

[0063] 4. By setting the tool guide block 510 and the tool mounting plate 502 to be movable up and down relative to the upper fixed plate 503, the punching action of the punching knife 511 can be separated from the mold closing process, and a good guiding effect is provided, avoiding the punching knife 511 from being impacted during the mold closing process, affecting the service life;

[0064] 5. By the floating connection of the tool mounting plate 502 and the upper fixed plate 503 through the guide rod 506 and the return spring 9, the independent movement of the tool mounting plate 502 can be met;

[0065] 6. By setting the comb structure at the lower part of the tool guide block 510, on the one hand, the guiding distance of the punching knife 511 can be prolonged, and on the other hand, the comb structure on the support block 403 can be cooperated to better compress the pin structure, preventing the pin from deforming during punching, affecting the manufacturing precision of the lead frame;

[0066] 7. By the cooperation of the step, the limiting block and the baffle, the detachable installation of the tool guide block 510 is realized, the corresponding tool guide block 510 can be replaced after the tool guide block 510 is deformed or damaged, without the need to replace other parts, and the use and maintenance cost is low;

[0067] 8. By setting the guide part 406, the cutting chips can be easily collected;

[0068] 9. The upper die assembly 5 is installed in the form of hanging, which improves the installation efficiency.

[0069] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lead frame adhesive overflow removal device, comprising a stamping machine body, the stamping machine body including a support plate (1) and a worktable, the support plate (1) being capable of reciprocating up and down, characterized in that, Also includes: The upper mold assembly (5) is detachably connected to the support plate (1). The upper mold assembly (5) includes a stamping knife (511). The lower part of the stamping knife (511) is provided with a comb structure for stamping the pin side areas of the lead frame. The lower die assembly (4) includes a lower fixing plate (401), on which a support block (403) is provided. The support block (403) is disposed opposite to the corresponding stamping knife (511). A comb structure for supporting the lead frame pin is provided on one side of the upper part of the support block (403). The surfaces of the lower fixing plate (401) and the upper mold assembly (5) that are in contact with each other are provided with receiving grooves (11), which are used to accommodate the plastic sealant in the middle area of ​​the lead frame. Both the support block (403) and the stamping knife (511) are provided with the edges of the corresponding receiving grooves (11) and are arranged according to the pin layout of the lead frame.

2. The lead frame adhesive removal device as described in claim 1, characterized in that, The upper mold assembly (5) further includes a cover plate (501) and a tool mounting plate (502). The cover plate (501) is disposed on the upper part of the tool mounting plate (502). A positioning block is disposed on the upper part of the stamping tool (511). The tool mounting plate (502) is provided with a tool mounting hole. A fixing block is disposed in the tool mounting hole. A tool bolt is screwed onto the cover plate (501). The tool bolt passes through the positioning block downward and is connected to the fixing block. The fixing block is located below the positioning block and abuts against the positioning block.

3. The lead frame adhesive removal device as described in claim 2, characterized in that, The lower fixing plate (401) is provided with a support mounting hole (408) located at the edge of the receiving groove (11). The support mounting hole (408) communicates with the receiving groove (11). The support block (403) is provided in the support mounting hole (408). A pressure plate (402) is screwed to the lower part of the support block (403). The pressure plate (402) is screwed to the lower fixing plate (401).

4. The lead frame adhesive removal device as described in any one of claims 2-3, characterized in that, The upper mold assembly (5) also includes an upper fixing plate (503), which is disposed below the tool mounting plate (502). The lower surface of the upper fixing plate (503) is provided with the receiving groove (11). The tool mounting plate (502) can move up and down relative to the upper fixing plate (503). The upper fixing plate (503) is provided with a guide hole at the edge of the receiving groove (11). The stamping tool (511) can extend out from the guide hole. A tool guide block (510) is provided in the guide hole. The tool guide block (510) can be attached to the stamping tool (511).

5. The lead frame adhesive removal device as described in claim 4, characterized in that, The upper fixing plate (503) is screwed with a guide rod (506), which can move up and down through the tool mounting plate (502). A limit seat (507) is provided at the upper end of the guide rod (506), and the limit seat (507) is provided in the cover plate (501) and can move up and down. A return spring (9) is provided between the limit seat (507) and the bearing plate (1). A limit post (504) is provided on the upper surface of the upper fixing plate (503).

6. The lead frame adhesive removal device as described in claim 4, characterized in that, The lower part of the tool guide block (510) is provided with a comb structure. The comb structure of the tool guide block (510) and the corresponding comb structure of the support block (403) are arranged vertically opposite each other. The comb structure of the stamping knife (511) can penetrate the comb structure of the tool guide block (510) and reach the comb structure of the support block (403).

7. The lead frame adhesive removal device as described in claim 4, characterized in that, The upper fixing plate (503) has a step in the guide hole, and the upper part of the tool guide block (510) has a limit block. The lower surface of the limit block can contact the upper surface of the step. The upper fixing plate (503) has a baffle screwed on it. The baffle can contact the upper surface of the limit block.

8. The lead frame adhesive removal device as described in claim 3, characterized in that, Multiple support blocks (403) share a pressure plate (402). The pressure plate (402) is provided with a chip flow groove at a position corresponding to the receiving groove (11). The chip flow groove is connected to the support mounting hole (408).

9. The lead frame adhesive removal device as described in claim 8, characterized in that, The debris channel includes a guide section (406) and a collection section (407) that are connected. The guide section (406) has a trapezoidal structure with the wide end facing upward.

10. The lead frame adhesive removal device as described in claim 4, characterized in that, The edge of the tool mounting plate (502) protrudes from the cover plate (501). A hanging rod (3) is provided on the support plate (1). The hanging rod (3) has an L-shaped structure. The edge of the tool mounting plate (502) rests on the hanging rod (3). The cover plate (501) is in contact with the lower surface of the support plate (1).

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