Lead frame overturning and sucking platform

Abstract

The utility model provides a lead frame overturning and sucking platform, which relates to the technical field of semiconductor device packaging, is matched with a machine table, a vacuum pump and a material plate for use, and comprises a bottom plate, a feeding module, an overturning module, a material pushing module and a PLC (Programmable Logic Controller), the feeding module is fixedly connected above the feeding bottom plate, the material pushing module is arranged on one side of the feeding module, and the overturning module is arranged on the other side of the feeding module. A turnover module is arranged between the feeding module and the pushing module, lead frames of different sizes can be loaded, the production efficiency is improved, the lead frames are loaded and arranged in a fool-proof mode through the arrangement of feeding blocking strips, it is ensured that materials are stacked in order, the materials are prevented from deforming and being clamped in the conveying process, the mode of vacuum closing auxiliary separation is adopted, and the production efficiency is improved. According to the utility model, the scribing phenomenon of the lead frame in the overturning process is reduced, the deviation of the lead frame in the overturning process is reduced, the accurate position of the material in the overturning process is ensured, and the scratch rate of the lead frame in the overturning process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor device packaging technology, specifically a lead frame flipping and pick-up platform. Background Technology

[0002] As a chip carrier for integrated circuits, the lead frame is a key structural component that uses bonding materials (gold wire, aluminum wire, copper wire) to achieve electrical connection between the internal circuit leads of the chip and the external leads, forming an electrical circuit. It acts as a bridge connecting to external wires. Most semiconductor integrated circuits require the use of lead frames, which are an important basic material in the electronics and information industry.

[0003] When the lead frame is being cut and gripped, the electroplated surface must not have any scratches. Therefore, the lead frame can only be clamped on one side and the other side. When the existing clamping mechanism clamps the edge of the lead frame, the entire lead frame will bend, which can easily damage the lead frame and cause the electroplated lead frame to become a defective product, resulting in significant losses.

[0004] Existing lead frame flipping platforms suffer from several drawbacks: incomplete separation: mechanical separation mechanisms may cause material scratches or lead frame deformation and jamming, affecting feeding efficiency; low positioning accuracy: material may shift during separation and conveying, leading to inaccurate positioning; and poor adaptability: existing equipment is usually designed for lead frames of specific sizes or shapes, making it difficult to adapt to lead frames of different specifications.

[0005] Chinese utility model patent publication number CN115744187A proposes a flipping mechanism for a lead frame. The flipping bracket has a flipping drive component, which has a flipping drive shaft that rotates coaxially with the flipping box. A flipping transmission assembly is set on the flipping box to transmit the lead frame located in the flipping chamber. The flipping transmission assembly includes a power transmission component, an upper transmission roller, and a lower transmission roller. The power transmission component drives the upper and lower transmission rollers to rotate simultaneously. During the flipping process, there are problems such as easy scratching and easy deviation causing material jamming.

[0006] To solve the above problems, it is urgent to develop a lead frame flipping and picking platform. Utility Model Content

[0007] This utility model discloses a lead frame flipping suction platform, which solves the problems of poor adaptability to bottle size, frequent feeding, and long adjustment time in existing ampoule packaging machines.

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: a lead frame flipping and suction platform, used in conjunction with a machine base, a vacuum pump and a material plate, including a base plate, a feeding module, a flipping module and a pushing module. The feeding module is fixedly connected above the feeding base plate, and a pushing module is provided on one side of the feeding module. A flipping module is provided between the feeding module and the pushing module.

[0009] Preferably, the feeding module includes a platform, a feeding plate, a feeding baffle, a feeding motor, and a feeding proximity switch. The platform is located above the base plate and has a feeding plate at a certain angle to the base plate. The feeding plate has a slide rail inside. The feeding baffle is snapped and fixed to the feeding plate. The feeding plate has a groove corresponding to the width of the feeding baffle. The feeding motor drives the feeding plate to reciprocate along the feeding baffle on the feeding plate. The feeding proximity switch is fixed to the front end of the feeding plate.

[0010] Preferably, the flipping module includes a flipping motor, a reduction wheel, a connecting crossbar, a suction head adjustment seat, a suction head, and a suction proximity switch. The connecting crossbar is movably connected to the front end of the platform. The suction head adjustment seat is vertically fixed to the connecting crossbar. The front end of the suction head adjustment seat is provided with a suction head straight rod, and the suction head straight rod is provided with suction heads arranged at equal intervals. The suction head adjustment seat is provided with a suction proximity switch. The flipping motor drives the connecting crossbar through the reduction wheel.

[0011] Preferably, the material pushing module includes a mounting plate, a long track, a short track, a conveyor hook, an optical fiber head one, an optical fiber head two, a synchronous conveyor belt, a track pushing base, a material pushing motor, a material pushing crossbar, a material pushing proximity switch, and a protective shell. The mounting plate is bolted to the top of the base plate. A horizontal support is provided on the mounting plate. The long track is fixed to the inside of the horizontal support, and the short tracks are fixed at intervals to the outside of the horizontal support. The material pushing motor drives the synchronous conveyor belt to move. The track pushing base is fixedly connected to the synchronous conveyor belt. The material pushing crossbar is bolted to the track pushing base. The conveyor hook is perpendicularly connected to the material pushing crossbar and fixed.

[0012] Preferably, the feeding plate is located on one side of the carrying plate, and the width of the carrying plate is greater than the width of the feeding plate.

[0013] Preferably, the width between the long and short tracks is greater than the width of the suction head rod, and the width between the short tracks is greater than the width of the suction head adjustment seat.

[0014] Preferably, when the first optical fiber head and the second optical fiber head detect the material plate simultaneously, and when the first optical fiber head and the second optical fiber head lose detection of the material plate one after the other, the pusher motor reverses and retracts the conveying hook.

[0015] Preferably, the PLC controller is electrically connected to the feeding proximity switch, the feeding motor, the suction proximity switch, the flipping motor, the first fiber optic head, the second fiber optic head, the pushing motor, and the pushing proximity switch.

[0016] Beneficial effects

[0017] This invention provides a lead frame flipping and picking platform, which has the following advantages compared with the prior art:

[0018] This invention employs a wide-body loading platform, enabling the loading of lead frames of different sizes, thereby improving production efficiency. By setting loading stops, it prevents mistaken loading of the lead frames, ensuring neat stacking and preventing deformation and jamming during transport. A vacuum-sealed assisted separation method reduces scratching of the lead frames during flipping, while also minimizing deviation, ensuring accurate positioning and reducing scratches. This invention also features a simple structure, convenient daily maintenance, and reduced maintenance costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 This is a diagram showing the structure of this utility model in use;

[0021] Figure 2 This is a schematic diagram of the structure of this utility model;

[0022] Figure 3 This is a schematic diagram of Part A of the present utility model;

[0023] Figure 4 This is a side view of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of this utility model when the protective shell is removed;

[0025] In the picture:

[0026] 1. Base plate;

[0027] 2. Feeding module, 201. Platform, 202. Feeding plate, 203. Feeding stop bar, 204. Feeding motor, 205. Feeding proximity switch;

[0028] 3. Tilting module, 301. Tilting motor, 302. Reduction wheel, 303. Connecting crossbar, 304. Suction head adjustment seat, 305. Suction head, 306. Suction proximity switch, 307. Suction head straight rod, 308. Air pipe;

[0029] 4. Material pushing module; 401. Mounting plate; 402. Long track; 403. Short track; 404. Conveyor hook; 405. Fiber optic head one; 406. Fiber optic head two; 407. Synchronous conveyor belt; 408. Track pushing base; 409. Material pushing motor; 410. Material pushing crossbar; 411. Material pushing proximity switch; 412. Protective shell.

[0030] 5. Machine tool. Detailed Implementation

[0031] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. The technical solutions of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0032] Please see Figure 1-5 This utility model provides a technical solution: a lead frame flipping and suction platform, which is used in conjunction with a machine base 5, a vacuum pump and a material plate, including a base plate 1, a feeding module 2, a flipping module 3, a pushing module 4 and a PLC controller. The feeding module 2 is fixedly connected above the feeding base plate 1. The pushing module 4 is provided on one side of the feeding module 2. The flipping module 3 is provided between the feeding module 2 and the pushing module 4. The PLC controller performs intelligent control of the feeding module, the flipping module 3 and the pushing module 4.

[0033] In some embodiments, the feeding module 2 includes a platform 201, a feeding plate 202, a feeding baffle 203, a feeding motor 204, and a feeding proximity switch 205. The platform 201 is located above the base plate 1 and has a feeding plate at a certain angle to the base plate 1. The feeding plate has a slide rail. The feeding baffle 203 is snapped and fixed to the feeding plate. The feeding plate 202 has a groove corresponding to the width of the feeding baffle 203. The front end of the feeding motor 204 has a transmission structure. The feeding motor 204 drives the feeding plate 202 to reciprocate along the feeding baffle 203 on the feeding plate 202. The feeding proximity switch 205 is fixed to the front end of the feeding plate.

[0034] In some embodiments, the flipping module 3 includes a flipping motor 301, a reduction wheel 302, a connecting crossbar 303, a suction head adjustment seat 304, a suction head 305, and a suction proximity switch 306. The connecting crossbar 303 is movably connected to the front end of the platform 201. The suction head adjustment seat 304 is vertically fixedly connected to the connecting crossbar 303. The front end of the suction head adjustment seat 304 is provided with a suction head straight rod 307. The suction head straight rod 307 is provided with suction heads 305 arranged at equal intervals. The suction heads 305 are connected to a vacuum pump through an air pipe 308. The suction head adjustment seat 304 is provided with a suction proximity switch 306. The flipping motor 301 drives the connecting crossbar 303 through the reduction wheel 302.

[0035] In some embodiments, the feeding module 4 includes a mounting plate 401, a long track 402, a short track 403, a conveying hook 404, an optical fiber head 405, an optical fiber head 406, a synchronous conveyor belt 407, a track pushing base 408, a feeding motor 409, a feeding crossbar 410, a feeding proximity switch 411, and a protective shell 412. The mounting plate 401 is bolted and fixed above the base plate 1. A horizontal support is provided on the mounting plate 401. The long track 402 is fixed inside the horizontal support, and the short tracks 403 are fixed at intervals on the outside of the horizontal support. The feeding motor 409 drives the synchronous conveyor belt 407 to move. The track pushing base 408 moves and is fixedly connected to the synchronous conveyor belt 407. The feeding crossbar 410 is bolted and fixed to the track pushing base 408. The conveying hook 404 is vertically connected and fixed to the feeding crossbar 410.

[0036] In some embodiments, the stage 201 is a wide-body stage 201, and the length of the feeding plate 202 can be adjusted according to the length of the lead frame, enabling the flipping of most existing lead frames. The lead frame flipping and suction platform is equipped with a device switch. When the switch is turned on, the feeding motor 204 runs, driving the feeding plate 202 to move upward. The feeding proximity switch 205 is normally closed. When the feeding proximity switch 205 detects that the lead frame has reached the designated position, the feeding proximity switch 205 turns on, and the PLC controller sends a signal to the feeding motor 204, causing the feeding motor 204 to stop running. When the lead frame inside the feeding plate 202 flips, causing the feeding proximity switch 205 to no longer detect the lead frame, the feeding proximity switch 205 closes, and the PLC controller sends a signal to the feeding motor 204, causing the feeding motor 204 to run and raise the position of the lead frame. After the lead frame on the feeding plate 202 has finished flipping, pressing the reset button controls the feeding motor 204 to return.

[0037] In some embodiments, when the feeding proximity switch 205 is turned on, the PLC controller simultaneously transmits a signal to the tilting motor 301. The tilting motor 301 rotates, and after being decelerated by the reduction wheel 302, it controls the connecting crossbar 303 to rotate. The connecting crossbar 303 drives the suction head adjustment seat 304 and the suction head straight rod 307 to rotate to a predetermined position. When the suction proximity switch 306 detects the lead frame, the suction proximity switch 306 closes and transmits a signal to the PLC controller. The PLC controller controls the electromagnetic switch of the air pipe 308 to open. Multiple suction heads 305 adsorb and fix the lead frame under the action of the vacuum pump. The PLC controller controls the tilting motor 301 to reverse, and the suction head adjustment seat 304 drives the lead frame to a predetermined position between the long track 402 and the short track 403, completing the tilting of the lead frame.

[0038] In some embodiments, when the lead frame reaches a predetermined position between the long track 402 and the short track 403, the pusher proximity switch 411 closes and transmits a signal to the PLC controller. The PLC controller controls the electromagnetic switch of the air pipe 308 to close, and the suction head 305 releases the lead frame to the predetermined position. At the same time, the PLC controller controls the pusher motor 409 to rotate, and the pusher motor 409 drives the synchronous conveyor belt 407 to run. The synchronous conveyor belt 407 drives the pusher crossbar 410 and the conveyor hook 404 fixed on the track pusher base 408 to move forward. The conveyor hook 404 pushes the lead frame to move towards the machine platform 5. When the first optical fiber head 405 and the second optical fiber head 406 simultaneously detect the material plate, and the first optical fiber head 405 and the second optical fiber head 406 successively lose detection of the material plate, the pusher motor 409 reverses and retracts the conveyor hook 404, completing the flipping of the lead frame.

[0039] In some embodiments, a protective shell 412 is provided on one side of the feeding module 4 to ensure the stability of the equipment operation.

[0040] In some embodiments, the PLC controller is electrically connected to the feeding proximity switch 205, the feeding motor 204, the suction proximity switch 306, the flipping motor 301, the first fiber optic head 405, the second fiber optic head 406, the pushing motor 409, and the pushing proximity switch 411.

[0041] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. For those skilled in the art to which the present invention pertains, several simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered as falling within the scope of patent protection determined by the submitted claims.

Claims

1. A lead frame flipping and suction platform, used in conjunction with a machine base, a vacuum pump, and a material plate, characterized in that, It includes a base plate, a feeding module, a flipping module, a pushing module, and a PLC controller. The feeding module is fixedly connected above the feeding base plate. A pushing module is provided on one side of the feeding module. A flipping module is provided between the feeding module and the pushing module.

2. The lead frame flipping and picking platform according to claim 1, characterized in that, The feeding module includes a platform, a feeding plate, a feeding baffle, a feeding motor, and a feeding proximity switch. The platform is located above the base plate and has a feeding plate at a certain angle to the base plate. The feeding plate has a slide rail inside. The feeding baffle is snapped and fixed to the feeding plate. The feeding plate has a groove corresponding to the width of the feeding baffle. The feeding motor drives the feeding plate to reciprocate along the feeding baffle on the feeding plate. The feeding proximity switch is fixed to the front end of the feeding plate.

3. The lead frame flipping and picking platform according to claim 2, characterized in that, The flipping module includes a flipping motor, a reduction wheel, a connecting crossbar, a suction head adjustment seat, a suction head, and a suction proximity switch. The connecting crossbar is movably connected to the front end of the platform. The suction head adjustment seat is vertically fixed to the connecting crossbar. The front end of the suction head adjustment seat is provided with a suction head straight rod, and the suction head straight rod is provided with suction heads arranged at equal intervals. The suction head adjustment seat is provided with a suction proximity switch. The flipping motor drives the connecting crossbar through the reduction wheel.

4. The lead frame flipping and picking platform according to claim 3, characterized in that, The feeding module includes a mounting plate, a long track, a short track, a conveyor hook, an optical fiber head one, an optical fiber head two, a synchronous conveyor belt, a track pushing base, a feeding motor, a feeding crossbar, a feeding proximity switch, and a protective shell. The mounting plate is bolted to the top of the base plate. A horizontal support is provided on the mounting plate. The long track is fixed to the inside of the horizontal support, and the short track is fixed at intervals to the outside of the horizontal support. The feeding motor drives the synchronous conveyor belt to move. The track pushing base is fixedly connected to the synchronous conveyor belt. The feeding crossbar is bolted to the track pushing base. The conveyor hook is perpendicularly connected to the feeding crossbar and fixed.

5. A lead frame flipping and picking platform according to claim 4, characterized in that, The feeding plate is located on one side of the carrying plate, and the width of the carrying plate is greater than the width of the feeding plate.

6. A lead frame flipping and picking platform according to claim 5, characterized in that, The width between the long and short tracks is greater than the width of the suction head rod, and the width between the short tracks is greater than the width of the suction head adjustment seat.

7. A lead frame flipping and picking platform according to claim 6, characterized in that, When both fiber optic head one and fiber optic head two detect the material plate simultaneously, and when fiber optic head one and fiber optic head two lose detection of the material plate one after the other, the pusher motor reverses and retracts the conveying hook.

8. A lead frame flipping and picking platform according to claim 7, characterized in that, The PLC controller is electrically connected to the feeding proximity switch, feeding motor, suction proximity switch, tilting motor, fiber optic head one, fiber optic head two, pushing motor, and pushing proximity switch.

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