A lead frame mold device capable of limited translation

Abstract

The utility model provides a kind of lead frame mould device of limitable translation, it is related to lead frame technical field;The lead frame mould device of limitable translation, including platform, two sprocket are rotatably connected on the platform, and mounting frame is installed, and one-way ratchet set is rotatably arranged in platform side, transmission is set with sprocket chain between two described sprocket, the sprocket chain outside is provided with multiple lower mould piece, and the upper mould piece of lifting sliding setting is set on the mounting frame;The lead frame mould device of limitable translation, by distributing multiple lower mould on sprocket chain, closed cycle is formed;When one of lower mould is in processing area, product can be placed on spare lower mould, without waiting for upper mould stamping to end and back, and the lower mould of processing area also does not need to reset back, it is unidirectional circulation processing as a whole, process does not need long time to wait, thus the working efficiency of lead frame mould device can be effectively improved.

Description

Technical Field

[0001] This utility model relates to a lead frame mold device with limited translation, specifically a lead frame mold device with limited translation, belonging to the field of lead frame technology. Background Technology

[0002] Leadframes are metal structural components in semiconductor packaging used to connect internal chip circuitry to external wires for electrical connection, while also providing mechanical support and heat dissipation. Their primary material is copper alloy, including copper-iron and copper-nickel-silicon alloys, requiring properties such as tensile strength ≥600MPa and conductivity ≥80% IACS.

[0003] Leadframe molds are the "metronome" of semiconductor packaging lines. Traditional structures generally adopt a reciprocating mode of "one punch and one return": after the upper mold is pressed, it must return to the highest point before the lower mold can exit and reload; after the second material is placed, the upper mold moves down again, and so on. This intermittent process of "punching - return - pick up - place - punch again" means that the actual processing time of the equipment is less than 50%, with the rest consumed in the return and waiting. At the same time, to avoid personal injury, the operator can only approach the mold area after the upper mold has completely stopped and returned, further lengthening the cycle time. As packaging plants continue to increase their requirements for UPH (unit hour capacity), the inherent defects of reciprocating molds, which "can only process one piece at a time and must wait for the return", are becoming increasingly prominent, becoming a bottleneck restricting capacity improvement.

[0004] For example, patent CN221209555U discloses a "semiconductor lead frame mold" that uses a gear-rack mechanism to convert the lifting motion of the upper mold into the translational motion of the lower mold, achieving "automatic mold feeding during stamping and automatic mold withdrawal during return," thus solving the safety hazards caused by fixed molds. However, this solution still belongs to the "single-piece reciprocating" approach: after the lower mold withdraws, it must wait for manual or robotic reloading before returning to the stamping position. During the upper mold's return stroke, the entire system is in an idling waiting state, failing to fundamentally eliminate the inefficient link of "return stroke = machine stoppage."

[0005] Therefore, the industry urgently needs a new structure that allows for "non-stop return stroke and no waiting for material loading," so that the next die is automatically in place while the upper die is resetting, thereby converting the return stroke time into effective processing time and achieving truly continuous and efficient stamping. Utility Model Content

[0006] (a) Technical problems to be solved The purpose of this invention is to provide a lead frame mold device that can be limited and translated in order to solve the above-mentioned problems, thereby addressing the issue of low working efficiency in existing lead frame mold devices.

[0007] (II) Technical Solution This utility model is achieved through the following technical solution: a lead frame mold device with limited translation, including a platform, two sprockets rotatably connected to the platform, and a mounting frame, and a one-way ratchet group rotatably arranged on one side of the platform, a toothed chain driving between the two sprockets, multiple lower mold parts arranged outside the toothed chain, an upper mold part with lifting and sliding arrangement arranged on the mounting frame, a rack rod fixedly arranged on one side of the upper mold part, a gear meshing with one side of the rack rod, a linkage connecting the gear and the outer ring of the one-way ratchet group driving between the gear and the corresponding sprocket, and a connecting rod driving between the inner ring of the one-way ratchet group and the corresponding sprocket.

[0008] Preferably, the one-way ratchet assembly includes an outer ring and an inner ring rotatably connected to the side wall of the platform. The inner wall of the outer ring has grooves arranged in a circumferential array, and a stop pawl is rotatably connected to the inner wall of the groove. A spring is provided between the side wall of the stop pawl and the inner wall of the groove. The outer side of the inner ring has toothed grooves arranged in a circumferential array. The movable end of the stop pawl cooperates with the toothed grooves. The two ends of the connecting rod are respectively fixed at the axis of the inner ring and the axis of the corresponding sprocket.

[0009] Preferably, the linkage includes a worm gear and a worm shaft that mesh with each other. The worm gear is fixedly sleeved on the outer side of the outer ring. Multiple fixing blocks are rotatably sleeved on the outer side of the worm shaft. The fixing blocks are fixedly set on one side of the platform. One end of the worm shaft is fixedly connected to the gear shaft.

[0010] Preferably, the lower mold includes a lower mold, the bottom of the lower mold has a sliding groove, a sliding rod is fixedly disposed between the two ends of the sliding groove, a slider and a spring are slidably sleeved on the outside of the sliding rod, the slider is slidably disposed in the sliding groove, and the slider is fixedly disposed on the outside of the toothed chain.

[0011] Preferably, the bottom of the lower mold is fixedly connected to two convex rods, and both ends of the top of the platform are provided with adapter grooves. Two convex grooves are provided between the two adapter grooves, and the convex rods are slidably connected to the convex grooves.

[0012] Preferably, a round block is fixedly provided at one end of each of the two convex rods facing each other, and an annular track groove is formed between the sidewall of the convex groove and the sidewall of the adapter groove, and the round block is slidably disposed in the corresponding annular track groove.

[0013] Preferably, the upper mold includes a cylinder mounted on a mounting bracket, with an upper mold fixedly mounted on the piston rod end at the bottom of the cylinder, and a limiting member restricting the movement of the lower mold provided on one side of the upper mold.

[0014] Preferably, the limiting component includes a limiting plate, and two stabilizing rods are fixedly connected to the top of the limiting plate. A second fixing block and a third spring are slidably sleeved on the outside of the stabilizing rods. The third spring is located between the second fixing block and the limiting plate. The second fixing block is fixedly set on one side of the upper mold. A limiting groove is opened at the top of the platform and at the corresponding position relative to the limiting plate. The bottom end of the limiting plate is inserted into the limiting groove.

[0015] Preferably, a through-type mounting groove is provided at the center of the top of the platform, and an inner plate is fixedly provided between the two sides of the mounting groove. Both sprockets are rotatably connected to the inner wall of the mounting groove, and the two sprockets are located at the two ends of the inner plate respectively. The toothed chain is sleeved on the outer side of the inner plate.

[0016] This utility model provides a lead frame mold device with limited translation, which has the following beneficial effects: This lead frame mold device with limited translation forms a closed loop by evenly distributing multiple lower molds on the toothed chain. When one of the lower molds is in the processing area, the product can be placed on the spare lower mold without waiting for the upper mold to finish stamping and return. The lower molds in the processing area also do not need to be reset and return. The whole process is a unidirectional cycle, and the process does not require a long waiting time. Therefore, it can effectively improve the working efficiency of the lead frame mold device.

[0017] This limit-positionable and translatable lead frame mold device physically separates the platform's stamping area from the loading and unloading area. Operators do not need to enter the mold closing area, and the mold movement is precisely guided by the limit track, which can effectively improve the safety of loading.

[0018] This lead frame mold device, capable of limited translation, simultaneously performs two actions: "stamping" and "stepping repositioning" via a cylinder. Stamping is performed when the cylinder moves downwards, and stepping is driven by a rack-pinion-ratchet mechanism when it moves upwards. This eliminates the need for additional motors or servo modules, effectively reducing the cost of drive components and control systems for the lead frame mold device. This lead frame mold device with limited displacement, through the insertion structure of the limiting plate and the limiting groove, completes the limiting before the upper mold moves downward. With the precise guidance of the convex rod and convex groove of the lower mold, it avoids the defects of the lower mold still moving horizontally or being unstable in positioning when the upper mold is stamping the product in the traditional technology. Therefore, it can significantly improve the product yield and enhance the practicality of the lead frame mold device. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the entire utility model; Figure 2 This is a three-dimensional cross-sectional view of the entire utility model; Figure 3 This is a three-dimensional cross-sectional view of the platform of this utility model; Figure 4 This is a three-dimensional schematic diagram showing the fit of the rack and pinion, the linkage, and the one-way ratchet assembly of this utility model. Figure 5 This is a three-dimensional schematic diagram of the sprocket and toothed chain of this utility model.

[0020] [Explanation of Key Component Symbols] 1. Platform; 2. Sprocket; 3. Gear chain; 4. Mounting bracket; 5. Lower mold; 51. Lower mold; 52. Slide bar; 53. Slider; 6. Upper mold; 61. Cylinder; 62. Upper mold; 63. Limiting component; 631. Limiting plate; 632. Stabilizing bar; 7. Rack and pinion; 8. Linkage component; 81. Worm gear; 82. Worm; 9. One-way ratchet assembly; 91. Outer ring; 92. Inner ring; 93. Stop pawl; 10. Connecting rod; 11. Gear; 12. Limiting groove; 13. Convex rod; 14. Adaptor groove; 15. Convex groove; 16. Round block; 17. Annular track groove; 18. Inner plate. Detailed Implementation

[0021] This utility model embodiment provides a lead frame mold device that can be limited and translated.

[0022] Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The system includes a platform 1, on which two sprockets 2 are rotatably connected, and a mounting frame 4 is installed. A one-way ratchet assembly 9 is rotatably installed on one side of the platform 1. A toothed chain 3 is driven between the two sprockets 2. Multiple lower mold parts 5 are installed outside the toothed chain 3. An upper mold part 6 with lifting and sliding is installed on the mounting frame 4. A rack rod 7 is fixedly installed on one side of the upper mold part 6. A gear 11 is meshed with one side of the rack rod 7. A linkage 8 is driven between the gear 11 and the outer ring of the one-way ratchet assembly 9. A connecting rod 10 is driven between the inner ring of the one-way ratchet assembly 9 and the corresponding sprocket 2. Specifically, the sprocket 2 and the toothed chain 3 are meshed and connected. A stabilizing groove is provided at the top of the platform 1 and at the corresponding position relative to the rack 7. The bottom end of the rack 7 is slidably set in the stabilizing groove to improve the stability of the rack 7's movement.

[0023] Example 2, please refer to Figure 1 and Figure 4The one-way ratchet assembly 9 includes an outer ring 91 and an inner ring 92 rotatably connected to the side wall of the platform 1. The inner wall of the outer ring 91 has grooves distributed in a circular array. A stop pawl 93 is rotatably connected to the inner wall of the groove. A spring is provided between the side wall of the stop pawl 93 and the inner wall of the groove. The outer side of the inner ring 92 has toothed grooves distributed in a circular array. The movable end of the stop pawl 93 cooperates with the toothed grooves. The two ends of the connecting rod 10 are respectively fixed at the axis of the inner ring 92 and the axis of the corresponding sprocket 2.

[0024] Example 3, please refer to Figure 1 , Figure 4 and Figure 5 The linkage 8 includes a worm wheel 81 and a worm 82 that mesh with each other. The worm wheel 81 is fixedly sleeved on the outside of the outer ring 91. Multiple fixing blocks are rotatably sleeved on the outside of the worm 82. The fixing blocks are fixedly set on one side of the platform 1. One end of the worm 82 is fixedly connected to the shaft of the gear 11. Specifically, a dust cover can be installed on platform 1 to cover the worm gear 81 and worm 82. The dust cover only needs to open a rotating hole in the rotating area of ​​the worm 82 and perform a rotary seal or mechanical seal. The dust cover can cover the worm gear 81 and worm 82 to improve their dustproof capability. Since the dust cover is a publicly available structure, this application will not elaborate on it.

[0025] Example 4, please refer to Figure 2 The lower mold 5 includes a lower mold 51. The bottom of the lower mold 51 is provided with a sliding groove. A sliding rod 52 is fixedly provided between the two ends of the sliding groove. A slider 53 and a spring are slidably sleeved on the outside of the sliding rod 52. The slider 53 is slidably disposed in the sliding groove and is fixedly disposed on the outside of the toothed chain 3. Specifically, to prevent the product from slipping due to the elasticity of spring 2, a negative pressure adsorption structure is added to the inner wall of the cavity of the lower mold 51: several vacuum adsorption holes are opened at the top of the lower mold 51, and each adsorption hole is connected to a quick-connect connector on the side of the slider 53 through an internal air channel; the quick-connect connector is connected to a rotary vacuum connector fixed below the platform 1 through a PU hose embedded in the toothed chain 3, and the rotary vacuum connector rotates with the sprocket 2 to keep the vacuum channel unobstructed; when any mold enters the "loading-standby position", the vacuum branch of the rotary vacuum connector is automatically connected, and the vacuum pump... A negative pressure of -65 kPa is generated to firmly adsorb the product into the cavity. After the mold moves to the "stamping position" with the toothed chain 3 and completes the stamping, the vacuum branch is disconnected, the adsorption force is automatically released, and the product can be directly taken away by the robot. No additional clamping elements are required throughout the process, which prevents slippage and does not affect the high-speed stepping. Since the vacuum adsorption related structures and equipment are all existing publicly disclosed technologies, their specific forms, usage methods and installation methods are all existing technical means. Existing publicly disclosed equipment can be used, and installation can be carried out according to the actual site conditions and needs. This application will not elaborate on the details.

[0026] Example 5, please refer to Figure 2 , Figure 3 and Figure 5 The bottom of the lower mold 51 is fixedly connected to two convex rods 13. Both ends of the top of the platform 1 are provided with adapter grooves 14. Two convex grooves 15 are provided between the two adapter grooves 14. The convex rods 13 and the convex grooves 15 are slidably connected. Specifically, the front end of the convex rod 13 is machined with a guide chamfer; the inner wall of the convex groove 15 is inlaid with a copper alloy bushing, and the inlet end is set with a rounded transition. The fit clearance is controlled at H7 / g6 grade precision fit, and molybdenum disulfide grease is applied regularly. During assembly, the chamfer and the rounded corner form a smooth guide to avoid scratches or jamming caused by rigid collisions, and ensure that the mold remains stable under reciprocating impact loads.

[0027] Example 6, please refer to Figure 5 Two convex rods 13 are each fixedly provided with a round block 16 at one end opposite to each other. An annular track groove 17 is formed between the side wall of the convex groove 15 and the side wall of the adapter groove 14. The round block 16 is slidably disposed in the corresponding annular track groove 17. Specifically, the circular block 16 is made of self-lubricating bearing materials, such as graphite copper bushing or polytetrafluoroethylene composite material. The surface of the annular track groove 17 is roughened and equipped with an automatic drip lubrication system. A small amount of lubricating oil is injected in each working cycle to form an oil film to isolate metal from direct metal contact, thus preventing abnormal noise or wear and ensuring low noise and high stability during long-term operation.

[0028] Example 7, please refer to Figure 1 , Figure 2 and Figure 3 The upper mold 6 includes a cylinder 61 mounted on the mounting bracket 4. The piston rod end at the bottom of the cylinder 61 is fixedly provided with an upper mold 62. A limiting member 63 restricting the movement of the lower mold 51 is provided on one side of the upper mold 62. Specifically, the cylinder model 61 is not limited; it depends on the compatible equipment.

[0029] Example 8, please refer to Figure 1 , Figure 2 , Figure 3 The limiting component 63 includes a limiting plate 631. Two stabilizing rods 632 are fixedly connected to the top of the limiting plate 631. A fixing block 2 and a spring 3 are slidably sleeved on the outside of the stabilizing rods 632. The spring 3 is located between the fixing block 2 and the limiting plate 631. The fixing block 2 is fixedly set on one side of the upper mold 62. A limiting groove 12 is opened at the top of the platform 1 and at the corresponding position relative to the limiting plate 631. The bottom end of the limiting plate 631 is inserted into the limiting groove 12. Specifically, the bottom of the limiting plate 631 has chamfers on all four sides; the inner side of the limiting groove 12 port is provided with an arc transition and the surface is laser-coated with a wear-resistant coating; the spring force of the spring three needs to be adjusted and tested in advance to ensure that the limiting plate 631 can provide sufficient lateral rigidity after being inserted into the limiting groove 12, so that the lower mold 51 maintains zero displacement during the stamping moment, while avoiding the impact force being directly transmitted to the cylinder 61 body; To completely eliminate the slight vibration caused by the second spring during the mold stepping process and ensure the positional stability of the lower mold 51 when it enters the processing area, an electromagnetic chuck is embedded on the side of the limiting plate 631 facing the lower mold 51, while an A3 steel suction block is embedded in the corresponding side wall of the lower mold 51. When the cylinder 61 drives the upper mold 62 to move downward, the limiting plate 631 first inserts into the limiting groove 12. At this time, the power supply contacts of the electromagnetic chuck are automatically connected through the elastic electrode plates installed on the platform 1. After the PLC detects that the limiting plate 631 is fully inserted, it triggers the electromagnetic chuck to be energized and generate an adsorption force, which firmly pulls the lower mold 51 toward the limiting plate 631, and the entire lower mold 51 and the platform 1 become one. After the stamping is completed, the electromagnetic chuck is de-energized and demagnetized, thereby improving the stamping stability of the product. This equipment can be made using existing publicly available technology, and this application will not elaborate on it in detail.

[0030] Example 9, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 A through-type mounting groove is provided at the center of the top of the platform 1. An inner plate 18 is fixedly installed between the two sides of the mounting groove. Two sprockets 2 are rotatably connected to the inner wall of the mounting groove, and the two sprockets 2 are located at the two ends of the inner plate 18 respectively. The toothed chain 3 is sleeved on the outside of the inner plate 18. Specifically, to ensure that the toothed chain 3 does not loosen or skip teeth during long-term operation, a spring tension wheel or screw adjustment tensioning mechanism is installed inside the platform 1; the toothed chain 3 is a high-strength, silent toothed chain 3, and the sprocket 2 is made of 45# steel with heat treatment and high-frequency quenching of the tooth surface; the inner wall of the mounting groove is equipped with an automatic oil spraying lubrication system, which sprays special chain oil evenly every 8 hours of working cycle to avoid early wear caused by dry friction and ensure long-term stable and jam-free overall linkage; To ensure the synchronization of the overall linkage and eliminate time errors caused by transmission backlash and inertial response differences, a preloaded backlash-eliminating spring is added to the meshing side of the rack 7 and gear 11 to continuously apply a certain torque preload and eliminate tooth backlash. The worm gear 81 and worm 82 adopt a double lead variable tooth thickness design. During assembly, the backlash is controlled within a reasonable range by axial adjustment shims to avoid reversing backlash. At the same time, a miniature proximity switch is installed at the bottom of the limit groove 12. When the limit plate 631 is inserted into place, the switch sends a feedback signal to the PLC. The PLC accurately calculates the theoretical displacement of the gear chain 3 based on this signal and sets compensation parameters in the program: if the lower mold 51 is detected to be delayed by more than 30ms, the cylinder 61 will be automatically triggered 10ms in advance in the next cycle to form a closed-loop compensation. In addition, a diaphragm coupling is used between the drive shaft of sprocket 2 and the connecting rod 10, which allows for a radial deviation of ±0.2mm and an angular deviation of ±0.5°, absorbing the problem of misalignment caused by cumulative errors in machining and assembly, and ensuring smooth and shock-free power transmission; PLC, micro proximity switch and diaphragm coupling and other equipment or structures are all existing publicly disclosed technology equipment or structures, and will not be described in detail in this application.

[0031] Working principle: The starting cylinder 61 drives the upper mold 62 to descend. The upper mold 62 carries the limiting plate 631 and descends. The upper mold 62 uses the rack rod 7 to drive the gear 11 to rotate. The gear 11 drives the worm 82 to rotate. The worm 82 uses the worm wheel 81 to drive the outer ring 91 to rotate. The outer ring 91 uses the stop pawl 93 to engage the tooth groove at the end, driving the inner ring 92 to rotate in the same direction. The inner ring 92 uses the connecting rod 10 to drive the corresponding sprocket 2 to rotate. The sprocket 2 drives the toothed chain 3 to rotate. The toothed chain 3 drives the spare lower mold part 5 to move from the loading area to the processing area until the lower mold part 5 contacts the limiting plate 631. In this process, the limiting plate 631 on the upper mold 62 will first be inserted into the limiting groove 12. At this time, the upper mold 62 continues to descend, and the stabilizing rod 632 on the limiting plate 631 slides in the fixed block 2 and remains stationary. Meanwhile, the lower mold 51 will move horizontally and contact the limiting plate 631. The limiting plate 631 restricts the lower mold 51 from continuing to move with the toothed chain 3. The slider 53 on the toothed chain 3 will slide on the sliding rod 52 and compress the spring 2 until the upper mold 62 and the lower mold 51 complete the stamping of the product. During the stamping process, workers can place the next batch of products into the lower mold 51 located in the unloading area without waiting for the lower mold 51 in the processing area to reset. After the product is processed, the cylinder 61 drives the upper mold 62 to rise. At this time, the upper mold 62 drives the gear 11 to rotate in the opposite direction using the rack 7. The gear 11 drives the worm 82 to rotate in the opposite direction. The worm 82 then drives the outer ring 91 to rotate in the opposite direction using the worm wheel 81. The outer ring 91 cannot drive the inner ring 92 to rotate together because of the setting of the stop pawl 93. Therefore, it is ensured that the sprocket 2 and the toothed chain 3 will not rotate in the opposite direction. Then, the above process is repeated to achieve continuous, unidirectional, and waiting-free mold conveying and stamping operations.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lead frame mold device with limited translation capability, comprising a platform (1), characterized in that: The platform (1) is rotatably connected to two sprockets (2) and a mounting frame (4) is installed. A one-way ratchet assembly (9) is rotatably provided on one side of the platform (1). A toothed chain (3) is driven between the two sprockets (2). Multiple lower mold parts (5) are provided on the outside of the toothed chain (3). An upper mold part (6) is provided on the mounting frame (4) and is slidably lifted. A rack rod (7) is fixedly provided on one side of the upper mold part (6). A gear (11) is meshed with one side of the rack rod (7). A linkage (8) is driven between the gear (11) and the outer ring of the one-way ratchet assembly (9). A connecting rod (10) is driven between the inner ring of the one-way ratchet assembly (9) and the corresponding sprocket (2).

2. The lead frame mold device with limited translation according to claim 1, characterized in that: The one-way ratchet assembly (9) includes an outer ring (91) and an inner ring (92) rotatably connected to the side wall of the platform (1). The inner wall of the outer ring (91) is provided with grooves distributed in a circular array. A stop pawl (93) is rotatably connected to the inner wall of the groove. A spring is provided between the side wall of the stop pawl (93) and the inner wall of the groove. The outer side of the inner ring (92) is provided with toothed grooves distributed in a circular array. The movable end of the stop pawl (93) cooperates with the toothed grooves. The two ends of the connecting rod (10) are respectively fixed at the axis of the inner ring (92) and the axis of the corresponding sprocket (2).

3. The lead frame mold device with limited translation according to claim 1, characterized in that: The linkage (8) includes a worm wheel (81) and a worm (82) that mesh with each other. The worm wheel (81) is fixedly sleeved on the outside of the outer ring (91). Multiple fixing blocks are rotatably sleeved on the outside of the worm (82). The fixing blocks are fixedly set on one side of the platform (1). One end of the worm (82) is fixedly connected to the shaft of the gear (11).

4. The lead frame mold device with limited translation according to claim 1, characterized in that: The lower mold (5) includes a lower mold (51). The bottom of the lower mold (51) is provided with a sliding groove. A sliding rod (52) is fixedly provided between the two ends of the sliding groove. A slider (53) and a spring are slidably sleeved on the outside of the sliding rod (52). The slider (53) is slidably disposed in the sliding groove and is fixedly disposed on the outside of the toothed chain (3).

5. The lead frame mold device with limited translation according to claim 4, characterized in that: The bottom of the lower mold (51) is fixedly connected to two convex rods (13), and the top of the platform (1) is provided with adapter grooves (14) at both ends. Two convex grooves (15) are provided between the two adapter grooves (14), and the convex rods (13) are slidably connected to the convex grooves (15).

6. The lead frame mold device with limited translation according to claim 5, characterized in that: A round block (16) is fixedly provided at one end of each of the two convex rods (13). An annular track groove (17) is formed between the side wall of the convex groove (15) and the side wall of the adapter groove (14). The round block (16) is slidably disposed in the corresponding annular track groove (17).

7. The lead frame mold device with limited translation according to claim 1, characterized in that: The upper mold (6) includes a cylinder (61) mounted on the mounting bracket (4). The piston rod end at the bottom of the cylinder (61) is fixedly provided with an upper mold (62). A limiting member (63) restricting the movement of the lower mold (51) is provided on one side of the upper mold (62).

8. The lead frame mold device with limited translation according to claim 7, characterized in that: The limiting component (63) includes a limiting plate (631). Two stabilizing rods (632) are fixedly connected to the top of the limiting plate (631). A fixing block 2 and a spring 3 are slidably sleeved on the outside of the stabilizing rods (632). The spring 3 is located between the fixing block 2 and the limiting plate (631). The fixing block 2 is fixedly set on one side of the upper mold (62). A limiting groove (12) is opened at the top of the platform (1) and at the corresponding position relative to the limiting plate (631). The bottom end of the limiting plate (631) is inserted into the limiting groove (12).

9. The lead frame mold device with limited translation according to claim 1, characterized in that: The platform (1) has a through-type mounting groove at the center of its top. An inner plate (18) is fixed between the two sides of the mounting groove. The two sprockets (2) are rotatably connected to the inner wall of the mounting groove, and the two sprockets (2) are located at the two ends of the inner plate (18). The toothed chain (3) is sleeved on the outside of the inner plate (18).

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