Full-automatic feeding system

Abstract

The utility model discloses a full-automatic feeding system which comprises a feeding base, a material frame transferring device, a first feeding device and a second feeding device, the material frame transferring device is used for transferring a material frame containing a lead frame and plastic packaging materials, the first feeding device is used for conveying the lead frame to a frame discharging opening of the material frame, and the second feeding device is used for conveying the lead frame to a frame discharging opening of the material frame. The second feeding device is used for outputting plastic packaging materials and conveying the plastic packaging materials into the feeding cylinder of the material frame. The material frame transferring device is installed on the top face of the feeding base and can move the material frame from a feeding station to a machining station in the longitudinal direction, and the second feeding device is installed beside the feeding station of the material frame in an adjacent mode and outputs plastic packaging materials towards the material frame in the transverse direction. According to the full-automatic feeding system, the material frame transferring device and the feeding device are redesigned, so that the structure of the full-automatic feeding system is more compact, and the feeding efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor packaging technology, and more specifically, to a fully automated feeding system. Background Technology

[0002] Packaging technology is the technique of encapsulating semiconductor integrated circuit chips with insulating plastic or ceramic materials. It is crucial for chip manufacturing processes because the chips must be isolated from the outside world to prevent impurities in the air from corroding the chips and causing a decline in their electrical performance. Packaged chips are also easier to install, transport, and store.

[0003] The current semiconductor chip molding process typically involves: loading molding compound and lead frames with attached chips separately; transferring the loaded molding compound and lead frames to their corresponding positions on the molding compound holder; and transferring the molding compound holder to the mold cavity of the hot press device.

[0004] In existing technology, the process of feeding molding compound is as follows: Molding compound is placed in a vibratory feeder. Vibration moves the molding compound along the upward-circulating plastic channel of the vibratory feeder. The vibratory feeder also has a linear feeding track connected to the plastic channel. When individual molding compounds move sequentially to the feeding track of the vibratory feeder, they can be gripped by a clamping mechanism. However, the vibratory feeder is located away from the material rack, resulting in a long conveying path for the molding compound, which is time-consuming and affects feeding efficiency.

[0005] In addition, in the existing technology, the molding die holder and the linear drive module are connected by a cantilever, and the cantilever has a curvature. The existing die holder transfer device is prone to instability when transferring the molding die holder, which leads to misalignment between the molding die holder and the mold of the hot pressing device, thereby affecting the production quality of semiconductor chips.

[0006] Therefore, how to design a fully automatic feeding system that is compact in structure and provides stable and efficient feeding is a technical problem that the industry urgently needs to solve. Utility Model Content

[0007] To address the shortcomings of long conveying paths and low feeding efficiency of molding compound, this invention proposes a fully automatic feeding system. The material rack transfer device and the feeding device are redesigned, resulting in a more compact structure and higher feeding efficiency.

[0008] The technical solution adopted in this utility model is to design a fully automatic feeding system, including: a feeding base, a material rack transfer device, a first feeding device, and a second feeding device. The material rack transfer device is used to transfer the material rack containing the lead frame and molding compound. The first feeding device is used to move the lead frame into the frame discharge port of the material rack. The second feeding device is used to output the molding compound and move the molding compound into the feeding cylinder of the material rack. The material rack transfer device is installed on the top surface of the feeding base and can move the material rack longitudinally from the feeding station to the processing station. The second feeding device is installed adjacent to the feeding station of the material rack and outputs the molding compound transversely towards the material rack.

[0009] Furthermore, the material rack transfer device has a material rack translation mechanism and a material rack lifting mechanism.

[0010] The material rack translation mechanism includes two guide structures located on both sides of the material rack, and a movable frame movably disposed between the two guide structures;

[0011] The material rack lifting mechanism is connected to the movable frame and the material rack respectively. It includes a rotating shaft on the movable frame, two eccentric bearings at both ends of the rotating shaft, two support seats fixedly installed on the movable frame for supporting the two eccentric bearings, and two cantilever arms spaced apart. The first end of each cantilever arm is movably sleeved on the rotating shaft and close to the corresponding eccentric bearing, and the second end is fixedly connected to the material rack. The bottom of each eccentric bearing is placed on the support seat below it.

[0012] The movable frame is provided with two guide seats corresponding to the two cantilever arms. Each guide seat includes a vertical guide rail fixedly mounted on the movable frame and a movable plate movably mounted on the vertical guide rail. The movable plate is also fixedly connected to the first end of the corresponding cantilever arm.

[0013] Furthermore, the material rack lifting mechanism also includes a rotary drive module for driving the rotating shaft to rotate. The rotary drive module includes a motor and a conveying assembly disposed between the two cantilever arms. The conveying assembly includes a drive wheel connected to the output shaft of the motor, a driven wheel disposed on the rotating shaft, and a conveyor belt disposed on the drive wheel and the driven wheel.

[0014] Furthermore, each support is also provided with a limiting groove for limiting the eccentric bearing in the axial direction.

[0015] Furthermore, the first feeding device includes a feeding platform, a pushing mechanism, a feeding mechanism, and a first clamping mechanism.

[0016] The loading platform is used to place the material boxes for stacking lead frames;

[0017] A pushing mechanism is used to push the lead frame in the material box to the feeding mechanism in sequence.

[0018] A feeding mechanism for conveying the lead frame to a designated position;

[0019] The first clamping mechanism has mechanical claws for conveying the lead frame to the frame unloading port when it reaches the designated position.

[0020] Furthermore, the loading platform has an upper area, a lower area, and a material box lifting mechanism.

[0021] The upper region is used to place a full material box, and the upper region is provided with a first pusher mechanism to push the full material box to the material box lifting mechanism;

[0022] The lower area is used to place empty material boxes, and the lower area is provided with a second pusher mechanism to push the empty material boxes away from the material box lifting mechanism.

[0023] The material box lifting mechanism is installed adjacent to one side of the upper and lower areas, and is located between the pushing mechanism and the feeding mechanism. The material box lifting mechanism adjusts the height of the full material box so that the opening at one end of the material box faces the pusher claw of the pushing mechanism and the opening at the other end faces the feeding mechanism.

[0024] Furthermore, the feeding mechanism includes a positioning seat, a feeding belt, and a limiting block.

[0025] The positioning base includes two positioning side plates, the lead frame is located between the two positioning side plates, and the top of the two positioning side plates is provided with a clearance opening for gripping with the mechanical claw.

[0026] A feeding belt is installed on the inner side of the positioning seat, the lead frame is placed on the feeding belt, and the top surface of the feeding belt is higher than the bottom surface of the clearance opening.

[0027] A limiting block is installed at the end of the feed belt, which is capable of transporting the lead frame to abut against the limiting block.

[0028] Furthermore, the second feeding device includes a vibratory feeder, a guide, a material distribution component, a drive mechanism, and a second clamping mechanism.

[0029] A vibratory feeder having a feeding track and a discharge port located at the end of the feeding track;

[0030] A guide component, which is provided with a connection port corresponding to the discharge port;

[0031] The material separating component is movably disposed on one side of the guide component. The side of the material separating component near the guide component has multiple notches, which correspond one-to-one with multiple clamping units on the second clamping mechanism.

[0032] A drive mechanism is connected to the material distribution component, which moves along the extension direction of the guide component under the drive of the drive mechanism, such that the plurality of notches correspond sequentially to the connection port to receive the molding compound from the outlet of the vibratory feeder.

[0033] The second clamping mechanism has multiple clamping units for synchronously conveying the molding compound in the notch into the feeding cylinder.

[0034] Furthermore, the driving mechanism includes a fixed frame, a motor disposed on one side of the fixed frame, a conveyor belt disposed on the other side of the fixed frame and driven by the motor, and a movable component disposed on the conveyor belt and connected to the material distribution component.

[0035] Furthermore, the second feeding device also has a detection element disposed above the dispensing component, the detection element being used to determine whether the molding compound has entered the notch.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The second feeding device is installed close to the feeding station of the material rack, which shortens the feeding path of the molding compound and improves the feeding efficiency of the molding compound;

[0038] 2. The material rack transfer device is designed with two cantilever arms that are fixedly connected to the material rack. The longitudinal horizontal movement of the cantilever arms is realized through the guide structure, and the lifting movement of the cantilever arms is realized through the eccentric bearing, so that the material rack transfer device can transfer the material rack to the processing station more smoothly.

[0039] 3. The first feeding device is divided into an upper area and a lower area. The height of the material box is adjusted by the material box lifting mechanism to realize the alignment of the material box between the pushing mechanism and the feeding mechanism, as well as the transfer of the material box between the upper area and the lower area, thereby improving the feeding efficiency of the lead frame.

[0040] 4. The second feeding device is designed with guide components and distribution components. The connection port of the guide component corresponds to the discharge port of the vibratory feeder. The multiple notches of the distribution component correspond to the connection ports of the guide component in sequence, so as to realize the transfer of the plastic sealant in the vibratory feeder to the notches of the distribution component. When the clamping mechanism comes over, it simultaneously clamps all the plastic sealant on the distribution component. The distribution process can be carried out simultaneously when the clamping mechanism moves over to feed the material, saving the entire feeding time of the plastic sealant. Attached Figure Description

[0041] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein:

[0042] Figure 1 This is a three-dimensional schematic diagram of the fully automatic feeding system of this utility model without the top cover and top structure;

[0043] Figure 2 This is a three-dimensional schematic diagram of the main structure of the fully automatic feeding system of this utility model;

[0044] Figure 3 This is a top view schematic diagram of the main structure of the fully automatic feeding system of this utility model;

[0045] Figure 4 This is a partially enlarged schematic diagram of the material rack transfer device of this utility model from a first angle;

[0046] Figure 5 This is a partially enlarged schematic diagram of the second angle of the material rack transfer device of this utility model;

[0047] Figure 6 This is a partially enlarged schematic diagram of the third angle of the material rack transfer device of this utility model;

[0048] Figure 7 This is a three-dimensional schematic diagram of the main structure of the first feeding device of this utility model;

[0049] Figure 8 This is a three-dimensional schematic diagram of the first clamping mechanism of this utility model;

[0050] Figure 9 This is a three-dimensional schematic diagram of the main structure of the second feeding device of this utility model;

[0051] Figure 10 This is a three-dimensional schematic diagram of the second clamping mechanism of this utility model;

[0052] Figure 11 This is a top view schematic diagram of the main structure of the second feeding device of this utility model;

[0053] Figure 12 This is a partially enlarged top view of the second feeding device of this utility model;

[0054] Figure 13 This is a schematic diagram of the combined installation of the fully automatic feeding system and the sealing device of this utility model;

[0055] Explanation of reference numerals in the attached figures:

[0056] 100. Material rack; 101. Frame discharge port; 102. Feeding cylinder; 50. Sealing device; 40. Feeding base; 41. Preheating table;

[0057] 30. First feeding device; 31. Feeding platform; 311. Upper area; 312. Lower area; 32. Pushing mechanism; 321. Push claw; 33. Feeding mechanism; 34. First clamping mechanism; 341. Mechanical claw; 35. Material box lifting mechanism; 351. Pallet; 352. Lifting pressure plate; 36. Material box; 37. Lead wire frame; 38. First box pushing mechanism; 39. Second box pushing mechanism;

[0058] 20. Material rack transfer device; 21. Guide structure; 211. First guide structure; 2111. Support frame; 2112. Horizontal guide rail; 212. Second guide structure; 2121. Horizontal slide table; 2122. Limiting plate; 22. Moving frame; 221. Rotating shaft; 222. Eccentric wheel; 223. Cantilever; 224. Rotation drive module; 2241. Fixed plate; 2242. Motor; 2243. Conveying assembly; 225. Support base; 2250. Limiting groove; 226. Guide seat; 2261. Vertical guide rail; 2262. Movable plate; 227. Horizontal connecting plate; 2270. Square hole; 228. Longitudinal connecting plate;

[0059] 10. Second feeding device; 11. Guide component; 110. Connection port; 112. First guide part; 113. Second guide part; 12. Material distribution component; 120. Notch; 13. Drive mechanism; 131. Fixing frame; 142. Motor; 143. Moving part; 144. Cover plate; 1440. Clearance hole; 15. Detection component; 16. Linear guide rail; 161. Protrusion; 17. Vibratory feeder; 171. Feeding track; 172. Vibratory feeder outlet; 18. Second clamping mechanism; 181. Clamping unit; 19. Molding material. Detailed Implementation

[0060] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0061] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0062] In the description of this utility model, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0064] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0065] like Figures 1 to 3 As shown, the fully automatic feeding system proposed in this utility model includes: a feeding base 40, a material rack transfer device 20, a first feeding device 30, and a second feeding device 10. The feeding base 40 is provided with a preheating table 41 and a material rack transfer device 20. The material rack 100 is placed on the preheating table 41. The material rack 100 is provided with a frame discharge port 101 for placing the lead wire frame 37 and a frame support plate for supporting the lead wire frame 37 located in the frame discharge port 101. The material rack 100 is also provided with a feeding cylinder for placing the plastic sealant 19 and a baffle for supporting the plastic sealant 19 located in the feeding cylinder 102.

[0066] like Figure 4 , 5As shown, the rack transfer device 20 is used to transfer the rack 100 containing the lead frame 37 and the molding compound 19. The first feeding device 30 is used to move the lead frame 37 into the frame discharge port 101 of the rack 100, and the second feeding device 10 is used to output the molding compound 19 and move it into the feeding cylinder 102 of the rack 100. The first feeding device 30 is located on one side of the rack 100, and the second feeding device 10 is located on the other side of the rack 100, that is, the two feeding devices are distributed on the left and right sides of the rack 100, which shortens the longitudinal length of the fully automatic feeding system.

[0067] The material rack transfer device 20 is installed on the top surface of the feeding base 40 and can move the material rack 100 longitudinally from the loading station to the processing station. The second loading device 10 is installed adjacent to the loading station of the material rack 100 and outputs the molding compound 19 transversely toward the material rack 100. It should be understood that longitudinal and transverse are two different directions of movement, and in practical applications, the two directions of movement can be perpendicular or nearly perpendicular.

[0068] The material rack transfer device 20 includes a material rack translation mechanism and a material rack lifting mechanism. The material rack translation mechanism includes two guide structures 21 located on both sides of the material rack 100, and a movable frame 22 movably disposed between the two guide structures 21. The material rack lifting mechanism is connected to the movable frame 22 and the material rack 100 respectively. It includes a rotating shaft 221 disposed on the movable frame 22, two eccentric bearings 222 disposed at both ends of the rotating shaft 221, and two cantilever arms 223 disposed at intervals. The first end of each cantilever arm 223 is movably sleeved on the rotating shaft 221 and close to the corresponding eccentric bearing 222, and its second end is fixedly connected to the material rack 100. In this embodiment, two cantilever arms 223 are fixedly connected to the material rack 100. The material rack translation mechanism and the material rack lifting mechanism respectively drive the two cantilever arms 223 to move horizontally and vertically to realize the transfer of the material rack 100, thereby ensuring that the transfer of the material rack 100 is more stable.

[0069] In this embodiment, the material rack translation mechanism can be configured to include two guide structures 21 with the same structure, or two guide structures 21 with different structures, as long as the two guide mechanisms allow the movable frame 22 to move horizontally.

[0070] like Figure 6As shown, taking the material rack translation mechanism as an example, it includes two guide structures 21 with different structures. The two guide structures 21 are referred to as the first guide structure 211 and the second guide structure 212, respectively. The first guide structure 211 includes a support frame 2111 and a horizontal guide rail 2112 fixedly mounted on the support frame 2111. The second guide structure 212 includes a horizontal slide 2121 and a limiting plate 2122 parallel to the horizontal slide 2121. The first side of the movable frame 22 is located on the limiting plate 2122 and is movably connected to the horizontal slide 2121, and its second side is movably connected to the horizontal guide rail 2112. In this example, the translation drive module of the material rack translation mechanism can be set only on the first guide structure 211 side. The translation drive module is connected to the first side of the moving frame 22. The translation drive module drives the first side of the moving frame 22 to move on the horizontal slide table 2121. While the first side of the moving frame 22 moves, the second side of the moving frame 22 moves on the horizontal guide rail 2112. Thus, the lifting mechanism can be driven to move together with the material rack 100 through the moving frame 22.

[0071] like Figure 4 As shown, in this embodiment, the material rack lifting mechanism further includes a rotary drive module 224 for driving the rotary shaft 221 to rotate.

[0072] The rotary drive module 224 includes a fixed plate 2241, a motor 2242, and a conveyor assembly 2243. The fixed plate 2241 primarily supports and secures the motor 2242 and the conveyor assembly 2243. Two rectangular holes are provided on the fixed plate 2241 to reduce weight. Both sides of the fixed plate 2241 are connected to two cantilever arms 223, and the motor 2242 is mounted on the fixed plate 2241. The conveyor assembly 2243 includes a drive wheel, a driven wheel, and a conveyor belt. The drive wheel is connected to the output shaft of the motor 2242, the driven wheel is mounted on the rotary shaft 221, and the conveyor belt is mounted on both the drive wheel and the driven wheel. When the rotary drive module 224 is operating, the motor 2242 rotates, driving the drive wheel to rotate. Simultaneously, the conveyor belt drives the driven wheel to rotate, which in turn drives the rotary shaft 221 to rotate.

[0073] In this embodiment, the movable frame 22 is provided with two support seats 225 corresponding to the two eccentric bearings 222 to support and limit the two eccentric bearings 222.

[0074] like Figure 4 , 5As shown, two support seats 225 are spaced apart on the movable frame 22, and the two support seats 225 correspond one-to-one with two eccentric bearings 222. Each support seat 225 has a limiting groove 2250 at its top, and the limiting groove 2250 of each support seat 225 abuts against the circumferential surface of the corresponding eccentric bearing 222. By setting the limiting groove 2250, the eccentric bearing 222 can be limited in the axial direction to prevent the outer ring of the eccentric bearing 222 from shifting when the inner ring of the eccentric bearing 222 rotates with the rotating shaft 221.

[0075] In this embodiment, the lifting and lowering motion of the two cantilever 223 is achieved by the rotation of the two eccentric bearings 222. The moving frame 22 is also provided with two guide seats 226 corresponding to the two cantilever 223 to guide the lifting and lowering motion of the two cantilever 223.

[0076] Two guide seats 226 are spaced apart on the movable frame 22. Each guide seat 226 includes a vertical guide rail 2261 fixedly mounted on the movable frame 22, and a movable plate 2262 movably mounted on the vertical guide rail 2261. The movable plate 2262 is fixedly connected to the corresponding cantilever 223. When the two cantilever 223 moves vertically, it drives the two corresponding movable plates 2262 to move along the extension direction of the vertical guide rail 2261.

[0077] The first ends of the two cantilever arms 223 are mounted on the movable frame 22, and the second ends of the two cantilever arms 223 are mounted on the material rack 100. Since the height of the movable frame 22 is higher than the height of the material rack 100, the first ends of the two cantilever arms 223 are higher than the second ends.

[0078] The material rack lifting mechanism also includes a transverse connecting plate 227 and a longitudinal connecting plate 228. The transverse connecting plate 227 is disposed on the second end of the two cantilever 223, and four square holes 2270 are spaced apart on the transverse connecting plate 227. The longitudinal connecting plate 228 is fixedly disposed on the material rack 100, and one end of the longitudinal connecting plate 228 is disposed below the transverse connecting plate 227, and this end is fixedly connected to the transverse connecting plate 227.

[0079] like Figure 7 , 8 As shown, the first feeding device 30 has a feeding platform 31, a pushing mechanism 32, a feeding mechanism 33, and a first clamping mechanism 34. The feeding platform 31 is used to place a material box 36 for stacking lead frames 37. The material box 36 has openings at both ends. The pushing mechanism 32 is used to push the lead frames 37 in the material box 36 to the feeding mechanism 33 in sequence. The feeding mechanism 33 is used to transport the lead frames 37 to a designated position. The first clamping mechanism 34 has a mechanical claw 341 for transporting the lead frames 37 that have reached the designated position to the frame unloading port 101.

[0080] The loading platform 31 has an upper area 311, a lower area 312, and a box lifting mechanism 35. The upper area 311 is used to place full boxes and is equipped with a first box pushing mechanism 38 that pushes full boxes toward the box lifting mechanism 35. The lower area 312 is used to place empty boxes and is equipped with a second box pushing mechanism 39 that pushes empty boxes away from the box lifting mechanism 35. The box lifting mechanism 35 is used to adjust the height of the box 36. The box lifting mechanism 35 is installed adjacent to the upper area 311 and the lower area 312 on one side, and is located between the pushing mechanism 32 and the feeding mechanism 33.

[0081] The material box lifting mechanism 35 has a support plate 351 and a lifting pressure plate 352 located directly above the support plate 351. The first pushing mechanism 38 pushes a full material box in the upper area 311 onto the support plate 351. The lifting pressure plate 352 descends to press the full material box down and fix it onto the support plate 351. The support plate 351, the full material box, and the lifting pressure plate 352 are pushed and adjusted in height by the material box lifting mechanism 35 as a whole, so that the opening at one end of the material box 36 faces the pusher claw 321 of the pushing mechanism 32, and the opening at the other end faces the feeding mechanism 33. After all the lead frame 37 in the full material box has been discharged, the material box lifting mechanism 35 lowers the empty material box to be aligned with the height of the lower area 312. The lifting pressure plate 352 rises to release the empty material box, and the second pushing mechanism 39 pushes the empty material box into the lower area 312.

[0082] The feeding mechanism 33 includes a positioning seat, a feeding belt, and a limiting block. The positioning seat includes two positioning side plates, and the lead frame 37 is located between the two positioning side plates. The top of the two positioning side plates is provided with a clearance opening that cooperates with the mechanical claw 341 for gripping. The feeding belt (not shown in the figure) is installed on the inner side of the positioning seat, and the lead frame 37 is placed on the feeding belt. The top surface of the feeding belt is higher than the bottom surface of the clearance opening. The limiting block is installed at the end of the feeding belt, and the feeding belt can transport the lead frame 37 until it abuts against the limiting block. In some embodiments, in order to ensure the reliability of the feeding mechanism and the feeding efficiency, the front end of the feeding belt is also provided with at least two sets of clamping rollers arranged longitudinally at intervals. Each set of clamping rollers includes a pair of upper rollers and a lower roller. The pushing mechanism 32 pushes the lead frame 37 out between the upper rollers and the lower rollers of the clamping rollers. The clamping rollers continue to rotate, transporting the lead frame 37 backward onto the feeding belt, and then the feeding belt transports the lead frame 37 backward.

[0083] like Figure 9As shown, the second feeding device 10 includes a vibratory feeder 17, a guide 11, a dispensing component 12, a drive mechanism 13, and a second clamping mechanism 18. The guide 11, dispensing component 12, drive mechanism 13, and linear guide rail form a dispensing mechanism, used to receive multiple molding compounds 19 from the vibratory feeder 17 and to change the spacing between the multiple molding compounds 19. The second clamping mechanism 18 moves back and forth between the dispensing mechanism and the material rack 100. The second clamping mechanism 18 can directly clamp the multiple molding compounds 19 from the dispensing mechanism and place them into multiple feeding cylinders 102 of the material rack 100, completing the feeding of the molding compounds.

[0084] This embodiment does not limit the structure of the vibratory feeder; the vibratory feeder 17 can adopt an existing common structure.

[0085] The vibratory feeder 17 contains a cylindrical molding compound 19. Vibration causes the molding compound 19 to move along an upward-circulating feeding channel within the vibratory feeder 17. A feeding track 171, connected to the feeding channel, is also provided on the outer side of the vibratory feeder 17. Ultimately, a row of molding compounds 19 will be accommodated on the feeding track 171. In this embodiment, the end outlet of the feeding track 171 is referred to as the vibratory feeder outlet 172.

[0086] like Figure 10 As shown, the second clamping mechanism 18 includes a plurality of clamping units 181, the number of which can be four or other values. The clamping units 181 can be grippers or other structures. In some feasible embodiments of the present invention, the second clamping mechanism 18 includes four clamping units 181, each clamping unit 181 being a cylinder gripper.

[0087] like Figure 9 As shown, the guide member 11 and the material distribution member 12 are disposed above the linear guide rail 16, and the drive mechanism 13 is disposed below the linear guide rail 16. The guide member 11 and the material distribution member 12 are disposed adjacent to each other, and the side of the material distribution member 12 can fit against the side of the guide member 11. The guide member 11 is fixedly connected to the linear guide rail 16, and the material distribution member 12 is movably disposed on the linear guide rail 16. The drive mechanism 13 is connected to the material distribution member 12 to drive the material distribution member 12 to move.

[0088] like Figure 11 , 12As shown, the guide member 11 has a connection port 110, which corresponds to the vibratory feeder outlet 172. This connection port 110 allows the molding compound 19 at the vibratory feeder outlet 172 to move into the notch of the distribution member 12. The guide member 11 also prevents the molding compound 19 from falling out during movement after entering the notch of the distribution member 12. The guide member 11 can consist of two parts, including a first guide portion 112 and a second guide portion 113 spaced apart, with the connection port 110 formed by the gap between the first guide portion 112 and the second guide portion 113. Both the first guide portion 112 and the second guide portion 113 are mounted on the upper edge of the linear guide rail 16 using fasteners. The length of the first guide portion 112 is the same as the length of the second guide portion 113, and the height of the first guide portion 112 is the same as the height of the second guide portion 113. The side of the first guide portion 112 closest to the second guide portion 113 is a first side surface, which includes a first plane and a first inclined surface connected to each other. Similarly, the side of the second guide portion 113 closest to the first guide portion 112 is a second side surface, which includes a second plane and a second inclined surface connected to each other. By providing a first inclined surface to the first guide portion 112 and a second inclined surface to the second guide portion 113, the size of the connection port 110 near the vibratory feeder outlet 172 is made larger, allowing the molding compound 19 to enter the connection port 110 more smoothly.

[0089] The material distribution component 12 is movably disposed on one side of the guide component 11. The side of the material distribution component 12 closest to the guide component 11 has multiple notches 120. The number of notches 120 is the same as the number of clamping units 181 of the second clamping mechanism 18, and the spacing between the multiple notches 120 is the same as the spacing between the clamping units 181. Whenever one of the notches 120 of the material distribution component 12 aligns with the connection port 110 of the guide component 11, the molding compound 19 at the vibratory feeder outlet 172 can enter the notch 120 of the material distribution component 12 through the connection port 110. After the molding compound 19 enters the previous notch 120, the material distribution component 12 is moved so that the next notch 120 of the material distribution component 12 aligns with the connection port 110 of the guide component 11, allowing the molding compound 19 to enter the next notch 120. This process continues until all the notches 120 of the material distribution component 12 contain the molding compound 19. The material distribution component 12 is provided to change the spacing between the molding compound 19, and to make the spacing between the molding compound 19 the same as the spacing between the clamping units 181, so as to facilitate the second clamping mechanism 18 to clamp the molding compound 19. The material distribution component 12 is also provided with a groove (not shown in the figure) that is connected to the protrusion 161 of the linear guide rail 16, so as to achieve upper limit of the material distribution component 12 in the width direction, ensuring that the material distribution component 12 will not deviate in the width direction when the molding compound 19 enters the notch 120 and during the movement, thereby ensuring that the molding compound 19 is stably and accurately placed in the notch 120 of the material distribution component 12.

[0090] like Figure 9 As shown, the drive mechanism 13 is connected to the dispensing component 12. The drive mechanism 13 drives the dispensing component 12 to move along the extension direction of the guide component 11, so that the multiple notches 120 of the dispensing port correspond sequentially to the connection ports 110 of the guide component 11 to receive the molding compound 19 from the vibratory feeder outlet 172. The drive mechanism 13 is located below the linear guide rail 16. The drive mechanism 13 includes a fixed frame 131, a motor 142, a conveying assembly, a movable component 143, and a cover plate 144. The fixed frame 131 is connected to the linear guide rail 16 and is mainly used to fix and support the other components of the drive mechanism 13. The motor 142 is installed on one side of the fixed frame 131, and the conveying assembly is installed on the other side of the fixed frame 131. The conveying assembly includes a drive wheel connected to the output shaft of the motor 142, a driven wheel installed on the fixed frame 131, and a conveyor belt sleeved on the drive wheel and the driven wheel. One end of the movable component 143 is mounted on the conveyor belt, and the other end is connected to the side of the material distribution component 12 facing away from the guide component 11. A cover plate 144 is mounted on the other side of the fixed frame 131 and covers the conveyor assembly. The cover plate 144 has a clearance hole 1440 to allow a portion of the movable component 143 to be exposed, ensuring that the movable component 143 can move normally under the drive of the conveyor belt. When the drive mechanism 13 is working, the motor 142 rotates normally and drives the conveyor belt to move. The movable component 143 moves with the conveyor belt, thereby driving the material distribution component 12 to move.

[0091] The guide member 11 includes a first guide portion 112 and a second guide portion 113. The gap between the first guide portion 112 and the second guide portion 113 forms a connection port 110. The length of the first guide portion 112 is equal to the length of the second guide portion 113. The first guide portion 112 and the second guide portion 113 are installed at the upper edge of the linear guide rail 16. The material distribution member 12 is disposed above the linear guide rail 16. The material distribution member 12 has a groove (not shown in the figure), and the linear guide rail 16 has a protrusion 161. The groove (not shown in the figure) of the material distribution member 12 is engaged with the protrusion 161 of the linear guide rail 16. The material distribution member 12 has four notches 120 on the side near the guide member 11. The length of the material distribution member 12 is greater than the length of the first guide portion 112 or the length of the second guide portion 113. The drive mechanism 13 includes a fixed frame 131, a motor 142, a conveyor belt, a movable component 143, and a cover plate 144. The fixed frame 131 is located below and connected to the linear guide rail 16. The motor 142 is mounted on one side of the fixed frame 131, and the conveyor belt is located on the other side of the fixed frame 131 and is driven to move by the motor 142. The movable component 143 is mounted on the conveyor belt and connected to the side of the dispensing component 12 facing away from the guide component 11. The drive mechanism 13 drives the dispensing component 12 to move along the extension direction of the linear guide rail 16 (i.e., the extension direction of the guide component 11), so that the multiple notches 120 of the dispensing component 12 correspond sequentially to the connection ports 110 of the guide component 11 to receive the molding compound 19 from the vibratory feeder outlet 172, thereby changing the spacing between the four molding compounds 19.

[0092] In this embodiment, the second feeding device 10 may further include a detection element 15 to determine whether the molding compound 19 has entered the notch 120. When the detection element 15 determines that the molding compound 19 has entered the current notch 120, it can control the material distribution element 12 to move to transfer the next molding compound 19. The detection element 15 may be a CCD camera or other image sensor.

[0093] The detection element 15 is positioned above the material distribution element 12 and is mounted on a fixed base located below the feeding track 171 of the vibratory feeder 17 via a support plate. The detection element 15 determines whether the molding compound 19 has entered the notch 120.

[0094] like Figure 2 , 13 As shown, for ease of understanding, the workflow of the fully automatic feeding system will be described in detail below in conjunction with actual application scenarios.

[0095] When waiting for materials, the two cantilever 223 of the material rack transfer device 20 are in the lower position, placing the material rack 100 on the preheating table 41.

[0096] It should be noted that the material rack 100 is equipped with a frame feeding port 101 for placing the lead frame and a feeding cylinder 102 for placing the molding compound. The material rack 100 is also equipped with a heat insulation block to insulate the feeding cylinder 102 and prevent heat from being quickly transferred to the molding compound 19. This is because the molding compound 19 cannot be preheated before molding, as heating it will cause a chemical reaction, and prolonged heating will affect the packaging quality. The preheating station 41 mainly preheats the lead frame 37, causing it to expand to the same size as the molding mold.

[0097] The first clamping mechanism 34 (e.g., a mechanical gripper) begins to clamp the lead frame 37 one by one and transfer it to the frame feeding port 101 on the material rack 100 to preheat the lead frame 37 on the preheating table 41. After all the frame feeding ports 101 on the material rack 100 have placed the lead frame 37, the second clamping mechanism 18 (e.g., a cylinder gripper) begins to clamp the molding compound 19 and feed it into the feeding cylinder 102 on the material rack 100.

[0098] After the material feeding cylinder 102 on the material rack 100 is filled with molding compound 19, the material rack lifting mechanism drives the two cantilever arms 223 to rise together with the material rack 100, lifting the preheated lead frame 37 and the filled molding compound 19 away from the preheating table 41. Next, the translation mechanism drives the two cantilever arms 223 and the material rack 100 to move horizontally together, sending the material rack 100, lead frame 37 and molding compound 19 together to the processing station (i.e., the mold cavity of the molding device). Then, the material rack lifting mechanism drives the two cantilever arms 223 and the material rack 100 to fall together, so that the material rack 100 is accurately aligned with the hot pressing mold of the molding device 50.

[0099] Four small cylinders located at the four corners of the material rack 100 are activated to pull out the frame support plate on the material rack 100 that supports the lead frame 37, causing the lead frame 37 to fall into the hot press mold (the hot press mold is equipped with positioning pins to align with the positioning holes on the lead frame 37). After all the lead frames 37 on the material rack 100 have fallen, two cylinders located on the side of the material rack 100 are activated to move the baffle that supports the molding compound 19, causing the molding compound 19 to fall into the material cavity in the hot press mold.

[0100] Once the feeding process is complete, the material rack lifting mechanism drives the two cantilever arms 223 and the material rack 100 to rise together. The material rack translation mechanism also drives the two cantilever arms 223 and the material rack 100 to translate together, so that the material rack 100 returns to the initial position of the preheating table 41—the feeding station.

[0101] The molding device 50 starts the mold closing action, the upper and lower molds close, and the hydraulic cylinder drives the injection head in the hot-pressing lower mold to start injection.

[0102] This invention proposes a fully automatic feeding system, redesigning the material rack transfer device 20, the first feeding device 30, and the second feeding device 10. The material rack transfer device 20 can more smoothly transfer the material rack 100 into the mold cavity of the molding device 50, which is beneficial for the accurate alignment of the material rack 100 and the mold of the molding device 50, thereby ensuring the production quality of semiconductor chips. The first feeding device 30 adjusts the height of the material box 36 through the material box lifting mechanism 35, realizing the alignment of the material box 36 between the pushing mechanism 32 and the feeding mechanism 33, as well as the transfer of the material box 36 between the upper area 311 and the lower area 312, improving the feeding efficiency of the lead frame 37. The second feeding device 10 is installed close to the feeding station of the material rack 100, shortening the feeding path of the molding compound 19. The material distribution process can be carried out simultaneously when the second clamping mechanism 18 moves over to feed the material, saving the entire feeding time of the molding compound 19.

[0103] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fully automated feeding system comprising: The feeding base, the rack moving device, the first feeding device and the second feeding device, the rack moving device is used for moving the rack where the lead frame and the plastic package are placed, the first feeding device is used for feeding the lead frame into the frame outlet of the rack, and the second feeding device is used for outputting the plastic package and feeding the plastic package into the feeding cylinder of the rack. The rack moving device is installed on the top surface of the feeding base and can move the rack from the feeding station to the processing station along the longitudinal direction, the second feeding device is installed next to the feeding station of the rack, and the second feeding device outputs the plastic package to the rack along the transverse direction.

2. The fully automated feeding system of claim 1, wherein, The rack moving device has a rack translation mechanism and a rack lifting mechanism. The rack translation mechanism includes two guide structures on both sides of the rack and a moving frame movably arranged between the two guide structures. The rack lifting mechanism is connected to the moving frame and the rack respectively, and includes a rotating shaft arranged on the moving frame, two eccentric bearings arranged at both ends of the rotating shaft, two support seats fixedly installed on the moving frame and used for supporting the two eccentric bearings, and two cantilever arms arranged at intervals, the first end of each cantilever arm is movably sleeved on the rotating shaft and close to the corresponding eccentric bearing, and the second end is fixedly connected with the rack, and the bottom of each eccentric bearing is placed on the support seat below. The moving frame is provided with two guide seats corresponding to the two cantilever arms, each guide seat includes a vertical guide rail fixedly arranged on the moving frame, and a movable plate movably arranged on the vertical guide rail, and the movable plate is also fixedly connected with the first end of the corresponding cantilever arm.

3. The fully automated feeding system of claim 2, wherein, The rack lifting mechanism further includes a rotating drive module for driving the rotating shaft to rotate, the rotating drive module includes a motor and a transmission assembly arranged between the two cantilever arms, the transmission assembly includes a driving wheel connected to the output shaft of the motor, a driven wheel arranged on the rotating shaft, and a transmission belt arranged on the driving wheel and the driven wheel.

4. The fully automated feeding system of claim 2, wherein, Each support seat is further provided with a limiting groove for limiting the eccentric bearing in the axial direction.

5. The fully automated feeding system of claim 1, wherein, The first feeding device has a feeding table, a pushing mechanism, a feeding mechanism and a first clamping mechanism. The feeding table is used for placing the material box where the lead frames are stacked and placed. The pushing mechanism is used for pushing the lead frames in the material box to the feeding mechanism in sequence. The feeding mechanism is used for conveying the lead frames to the specified position. The first clamping mechanism has a mechanical claw for feeding the lead frame reaching the specified position to the frame outlet.

6. The fully automated feeding system of claim 5, wherein, The feeding table has an upper layer area, a lower layer area and a material box lifting mechanism. The upper layer area is used for placing the full material box, and the upper layer area is provided with a first box pushing mechanism for pushing the full material box to the material box lifting mechanism. The lower layer area is used for placing the empty material box, and the lower layer area is provided with a second box pushing mechanism for pushing the empty material box away from the material box lifting mechanism. A material box lifting mechanism is installed on one side of the upper layer area and the lower layer area, and is located between the material pushing mechanism and the material feeding mechanism. The material box lifting mechanism adjusts the height position of the full material box, so that the opening at one end of the material box faces the pushing claw of the material pushing mechanism, and the opening at the other end faces the material feeding mechanism.

7. The fully automated feeding system of claim 5, wherein, The material feeding mechanism has a positioning seat, a material feeding belt, and a limiting block. The positioning seat includes two positioning side plates, and the lead frame is located between the two positioning side plates. The top of each positioning side plate is provided with a gap for cooperation with the mechanical claw. The material feeding belt is installed on the inner side of the positioning seat, and the lead frame is placed on the material feeding belt. The top surface of the material feeding belt is higher than the bottom surface of the gap. The limiting block is installed at the end of the material feeding belt. The material feeding belt can transport the lead frame to the limiting block.

8. The fully automated feeding system of claim 1, wherein, The second feeding device has a vibrating disc, a guide, a material distributing member, a driving mechanism, and a second clamping mechanism. The vibrating disc has a feeding track and a discharging port at the end of the feeding track. The guide is provided with a connecting port corresponding to the discharging port. The material distributing member is movably arranged on one side of the guide. The side of the material distributing member close to the guide is provided with a plurality of notches corresponding to the plurality of clamping units on the second clamping mechanism. The driving mechanism is connected with the material distributing member. The material distributing member moves along the extension direction of the guide under the driving of the driving mechanism, so that the plurality of notches correspond to the connecting port in sequence to receive the plastic package material from the discharging port of the vibrating disc. The second clamping mechanism has a plurality of clamping units for synchronously conveying the plastic package material in the notches to the feeding cylinder.

9. The fully automated feeding system of claim 8, wherein, The driving mechanism includes a fixed frame, a motor arranged on one side of the fixed frame, a conveyor belt arranged on the other side of the fixed frame and driven by the motor, and a movable member arranged on the conveyor belt and connected with the material distributing member.

10. The fully automated feeding system of claim 8, wherein, The second feeding device further has a detection member arranged above the material distributing member. The detection member is used to judge whether the plastic package material enters the notches.

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