Lead frame automatic loading device

Abstract

The utility model lead frame automatic loading device, include: upper layer board, be equipped with layer board material hatch mouth on the upper layer board, material hatch bottom plate, material hatch bottom plate is arranged interval through connecting piece with the upper layer board, be equipped with bottom plate material hatch mouth and lift mouth on the material hatch bottom plate, lift mechanism, lift mechanism is connected with the upper layer board, control system, control system communicates with lift mechanism. The utility model carries two mirror symmetry's lift mechanism, with the aid of single -shaft servo slide, motor drive promotes the lifting pad block to lift, to the signal feedback signal in real time detection lead frame transmission state of the shot sensor, lift sensor accurate control lift stroke, realize the whole process automatic operation of feeding and discharging, need not manual sustained intervention, effectively solved the problem that manual operation monotonous, poor continuity, save time and labour and degree of automation is high.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical automation technology, and in particular, it is an automatic loading device for lead wire frames. Background Technology

[0002] In the semiconductor industry, lead frames are extremely important carriers, serving as a crucial bridge connecting internal circuits and external leads, and are a fundamental material for the electronics and information industry. During semiconductor packaging processes, lead frames are typically loaded into cassettes and then placed into subsequent workstations for the next process; or the lead frames are removed from the cassettes for processing at that workstation. Therefore, the loading and unloading of lead frames is a frequent operation. Currently, the loading and unloading of lead frames in the cassettes is mostly done manually. This manual loading and unloading process is monotonous, continuous, and prone to quality inconsistencies, hindering companies from improving production efficiency and reducing costs. Utility Model Content

[0003] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide an automatic loading device for lead frame that is easy to operate and can improve production efficiency.

[0004] To solve the above-mentioned technical problems, the present invention provides an automatic loading device for lead frame, comprising: an upper plate with a material tray opening; a material tray bottom plate, which is spaced apart from the upper plate by a connector and has a bottom plate material tray opening and a lifting opening; a lifting mechanism connected to the upper plate; and a control system communicating with the lifting mechanism; wherein the lifting mechanism comprises: an angle seat connected to the upper plate; a slide table fixing plate connected to the angle seat; a single-axis servo slide table mounted on the slide table fixing plate, with a motor on the single-axis servo slide table communicating with the control system; and a lifting pad connected to the slide table fixing plate by a lifting bracket, the position of which corresponds to the position of the bottom plate material tray opening.

[0005] The number of lifting mechanisms is two, and the two lifting mechanisms are connected to the two sides of the upper plate in a mirror-like supporting manner.

[0006] The lifting support includes: a lifting and fixing vertical plate, which is mounted on the single-axis servo slide; a first lifting and fixing horizontal plate, one end of which is connected to the lifting and fixing vertical plate; a second lifting and fixing horizontal plate, one end of which is connected to the other end of the first lifting and fixing horizontal plate, the position of which corresponds to the position of the lifting port; and a lifting pad block mounted on the second lifting and fixing horizontal plate via a lifting and fixing support plate; wherein the lifting and fixing vertical plate, the first lifting and fixing horizontal plate, and the second lifting and fixing horizontal plate surround the outside of the bottom plate of the material box.

[0007] Reinforcing ribs are provided at the connection points of the first lifting fixing horizontal plate, the lifting fixing vertical plate, and the second lifting fixing horizontal plate.

[0008] Two grooves are provided on the upper plate, and the two grooves are respectively located at both ends of the material box opening of the plate. A protective sealing plate is provided at the opening of the two grooves. A through-beam sensor is provided in each of the two grooves, and the through-beam sensor communicates with the control system.

[0009] Multiple proximity sensors are provided on the bottom plate of the material hopper. The multiple proximity sensors are located at the end and side of the material hopper opening on the bottom plate, and the multiple proximity sensors communicate with the control system.

[0010] Multiple lifting sensors are provided on the single-axis servo slide, and each of the multiple lifting sensors communicates with the control system.

[0011] Multiple guide strips are provided on the lower surface of the upper plate, and the multiple guide strips are located on the side of the material box opening of the plate. A rear stop strip is provided at the end of the multiple guide strips.

[0012] A groove sealing plate is provided on the lower surface of the upper plate.

[0013] A limiting unit is provided on the bottom plate of the material hopper. The limiting unit includes: a limiting fixing seat, which is disposed on the bottom plate of the material hopper; a spring, which is disposed in the limiting fixing seat; and a limiting handle, which is connected to the limiting fixing seat through a limiting rotation shaft.

[0014] Compared with the prior art, the automatic loading device for lead frames of this utility model has the following advantages: 1. Equipped with a lifting mechanism with two mirror supports, the lifting pad is raised and lowered by a single-axis servo slide and motor driven by a through-beam sensor to detect the transmission status of the lead frame in real time and provide feedback signals. The lifting sensor precisely controls the lifting stroke, realizing fully automated operation of the loading and unloading process without continuous manual intervention. This effectively solves the problems of monotony and poor continuity of manual operation, saving time and effort and achieving a high degree of automation.

[0015] 2. The proximity sensor on the bottom plate of the hopper can detect whether the hopper is in place and whether the placement direction is correct. The side guide strips, middle guide strips and rear baffles of the upper plate regulate the transmission path of the lead frame. The reinforcing ribs strengthen the lifting bracket to avoid mechanical deformation. The protective sealing plate prevents dust from interfering with the sensor detection. It eliminates the random error of manual operation from the source and solves the defect of unstable quality of traditional manual loading and unloading.

[0016] 3. The two lifting mechanisms can handle two material bins in parallel. The servo-driven lifting action is faster than manual operation, reducing waiting time. The overall structure uses lightweight materials such as aluminum profiles, and is equipped with protective sealing plates, wire trough sealing plates and other protective components. It is easy to maintain and highly durable, which reduces manpower input, material loss and equipment maintenance costs, meeting the needs of enterprises to improve efficiency and control costs.

[0017] 4. When picking up or placing the hopper, simply stretching and rotating the limit handle is sufficient to fix or unlock it, without the need for complicated operations. The control system automatically receives signals from each sensor and triggers corresponding actions, without the need for manual judgment and adjustment. Operators can get started after simple training, which significantly reduces the operating threshold and further adapts to the frequent picking and placing of lead frames in semiconductor packaging processes. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the automatic loading device for the lead frame of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the automatic loading device for the lead frame of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the automatic loading device for the lead frame of this utility model. Figure 3 ; Figure 4 This is a schematic diagram of the automatic loading device for the lead frame of this utility model. Figure 4 ; Figure 5 This is a schematic diagram of the automatic loading device for the lead frame of this utility model. Figure 5 ; Figure 6 This is a schematic diagram of the material box structure of the automatic loading device for the lead frame of this utility model. Figure 1 ; Figure 7 This is a schematic diagram of the material box structure of the automatic loading device for the lead frame of this utility model. Figure 2 .

[0020] Explanation of reference numerals in the accompanying drawings of this utility model's automatic lead frame loading device: Detailed Implementation

[0021] To make the objectives, 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 scope of the present utility model.

[0022] For ease of description, 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 indicated technical features. Therefore, 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, "multiple" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, terms such as "installed," "connected," "linked," and "fixed" 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 a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication 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.

[0023] Unless otherwise specified, the terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains, and should be understood to have the meaning consistent with the meaning in the context of the relevant art, and should not be interpreted in an idealized or over-formalized manner, except as expressly defined in this invention.

[0024] like Figures 1 to 7 As shown, the automatic loading device for lead wire frames of this utility model mainly includes an upper plate 3, a material bin bottom plate 1, a lifting mechanism, and a control system. The material bin bottom plate 1 is spaced apart from the upper plate 3 by connecting parts 2. The connecting parts 2 are made of aluminum profiles, ensuring structural stability while achieving a lightweight design. The lifting mechanism is connected to the upper plate 3 and communicates with the control system to achieve fully automated control of the entire process. There are two lifting mechanisms, mirror-faced and connected to both sides of the upper plate 3, allowing for parallel processing of two material bins 20, significantly improving operational efficiency and meeting the process requirements of frequent loading and unloading of lead wire frames.

[0025] The upper plate 3 has a shelf tray opening 6. Two grooves are located on the upper surface of the upper plate 3 corresponding to both ends of the shelf tray opening 6. Protective sealing plates 23 are installed at the openings of both grooves to effectively prevent dust from falling into the grooves and interfering with the operation of internal components. Through-beam sensors 25 are installed in each of the two grooves. These sensors communicate with the control system and can detect in real time whether there is a lead frame moving at the shelf tray opening 6. Once a lead frame is detected, a signal is promptly sent back to the control system, providing a basis for issuing subsequent action commands. On the lower surface of the upper plate 3, multiple guide strips are located on the side of the shelf tray opening 6, including a middle guide strip 4 and side guide strips 5. These guide strips regulate the transmission path of the lead frame, preventing deviation during transmission. Rear stop strips 7 are located at the ends of the guide strips to limit the lead frame movement and further ensure transmission accuracy. Simultaneously, a wire groove sealing plate 24 is also provided on the lower surface of the upper plate 3 to protect and shield the cables of the through-beam sensors 25, preventing cable damage or external interference.

[0026] The hopper base plate 1 has a base plate hopper opening 13 and a lifting port 14. The base plate hopper opening 13 is used for placing and pulling out the hopper 20, and the lifting port 14 has a rectangular structure adapted to the movement trajectory of the lifting mechanism. Multiple proximity sensors 26 are installed on the base plate hopper 1. These proximity sensors 26 are respectively installed at the ends and sides of the base plate hopper opening 13. Specifically, there are two position sensor fixing blocks 27 at the bottom of the base plate hopper opening 13, and two anti-reverse sensor fixing blocks 28 on both sides. The proximity sensors 26 are fixed to the position sensor fixing blocks 27 and the anti-reverse sensor fixing blocks 28, and all communicate with the control system. The two bottom proximity sensors 26 are used to detect whether two hoppers 20 are accurately placed at the base plate hopper opening 13, while the two side proximity sensors 26 are used to detect whether the placement direction of the hoppers 20 is correct. Through dual detection, operational malfunctions caused by abnormal or incorrect placement of the hoppers 20 are avoided from the source, ensuring stable operation of the device. The material cassette 20 contains a material support plate 21 and a support shoulder 22. The material support plate 21 can slide inside the material cassette 20 and rest on the support shoulder 22 at the bottom of the material cassette 20. The bottom plate 1 of the material cassette is also provided with a limiting unit, which includes a limiting fixing seat 29, a spring 32 and a limiting handle 31. The limiting fixing seat 29 is located in the middle of the two material cassette 20 placement positions at the front end of the material cassette opening 13 of the bottom plate. The spring 32 is installed in the limiting fixing seat 29. The limiting handle 31 is connected to the limiting fixing seat 29 through a limiting rotating shaft 30. The spring 32 is located between the limiting rotating shaft 30 and the limiting fixing seat 29. When it is necessary to place the material box 20, stretch and rotate the limiting handle 31 to the vertical position to insert the material box 20 into the material box opening 13 of the bottom plate. Then, pull and rotate the limiting handle 31 to the horizontal position to limit the front and rear directions of the material box 20 and prevent the material box 20 from shifting during operation. When it is necessary to pick up or put down the material box 20, simply rotate the limiting handle 31 to the vertical position to unlock it. The operation is simple and quick, without complicated steps, which reduces the operating threshold for operators.

[0027] The lifting mechanism includes an angle seat 12, a slide table fixing plate 10, a single-axis servo slide 8, and a lifting pad 11. The angle seat 12 is connected to the upper plate 3, and the slide table fixing plate 10 is fixedly connected to the angle seat 12. The single-axis servo slide 8 is mounted on the slide table fixing plate 10, and a motor 9 is mounted on the single-axis servo slide 8. The motor 9 communicates with the control system and can drive the single-axis servo slide 8 to run under the command of the control system. The lifting pad 11 is connected to the slide table fixing plate 10 via a lifting bracket. The lifting bracket includes a lifting fixing vertical plate 15, a first lifting fixing horizontal plate 16, and a second lifting fixing horizontal plate 17. The lifting fixing vertical plate 15 is mounted on the single-axis servo slide table 8. One end of the first lifting fixing horizontal plate 16 is connected to the lifting fixing vertical plate 15, and one end of the second lifting fixing horizontal plate 17 is connected to the other end of the first lifting fixing horizontal plate 16. The position of the second lifting fixing horizontal plate 17 corresponds to the position of the lifting port 14. The lifting pad 11 is mounted on the second lifting fixing horizontal plate 17 via a lifting fixing support plate 18. The lifting fixing vertical plate 15, the first lifting fixing horizontal plate 16, and the second lifting fixing horizontal plate 17 surround the outside of the material box bottom plate 1, forming a stable support structure without interference during lifting. Reinforcing ribs 19 are provided at the connection points of the first lifting fixing horizontal plate 16 with the lifting fixing vertical plate 15 and the second lifting fixing horizontal plate 17. The reinforcing ribs 19 effectively strengthen the connection strength of the lifting bracket, preventing deformation caused by mechanical stress during long-term operation and extending the service life of the device. The single-axis servo slide 8 is equipped with three lifting sensors 33. These lifting sensors 33 communicate with the control system and can accurately detect the lifting stroke of the single-axis servo slide 8, providing accurate position feedback for the lifting action of the lifting pad 11.

[0028] During the loading process, an empty cassette 20 is placed on the cassette base plate 1 through the cassette opening 13. After the cassette 20 is fixed by the limiting unit, the proximity sensor 26 on the position sensor fixing block 27 detects the cassette 20 and sends a feedback signal to the control system. The proximity sensor 26 on the anti-reverse sensor fixing block 28 detects that the cassette 20 is placed in the correct direction and also sends a feedback signal to the control system. At this time, the initial position of the lifting pad 11 is located through the cassette 20 and corresponds to the position of the upper layer plate 3 cassette opening 6. When the lead frame is placed on the lifting pad 11, the through-beam sensor 25 at the cassette opening 6 of the upper layer plate detects the lead frame and sends a feedback signal to the control system. The control system then instructs the corresponding motor 9 to run, driving the single-axis servo slide 8 to lower the lifting pad 11 by a set distance. As the lead frame is continuously placed, this process is repeated until the single-axis servo slide 8 triggers the bottom lifting sensor 33. The control system determines that the cassette 20 is full and prompts the operator to replace the cassette 20 to ensure continuous operation.

[0029] During the unloading process, the cassette 20 filled with lead wire frames is placed on the cassette base plate 1 and fixed. After the proximity sensor 26 confirms that it is in place and correctly positioned, the lifting pad 11 is initially located below the upper surface of the cassette base plate 1. When unloading is required, the control system commands the corresponding motor 9 to run, driving the single-axis servo slide 8 to lift the lifting pad 11, which in turn lifts the lead wire frames inside the cassette 20. When the through-beam sensor 25 at the cassette opening 6 detects the lead wire frames, the motor 9 stops running, and other mechanisms remove the lead wire frames from the cassette opening 6. Afterward, if the through-beam sensor 25 does not detect the lead wire frames, it sends a feedback signal to the control system, and the motor 9 continues to run, lifting the lifting pad 11 and the remaining lead wire frames. This process is repeated until the single-axis servo slide 8 triggers the top lifting sensor 33. The control system then determines that there are no lead wire frames in the cassette 20 and prompts the operator to replace the cassette 20, ensuring a continuous and efficient unloading operation.

[0030] Through the aforementioned structural design and operational process, this device utilizes two mirror-supported lifting mechanisms, powered by a single-axis servo slide 8 and a motor 9, to drive the lifting pad 11 to rise and fall. Combined with the coordinated action of the through-beam sensor 25, proximity sensor 26, lifting sensor 33, and control system, it achieves fully automated operation of the entire process of loading and unloading the lead frame, eliminating the need for continuous manual intervention. This completely solves the problems of monotony and poor continuity in manual operation, saving time and effort while significantly improving automation. Simultaneously, the proximity sensor 26 on the bottom plate 1 of the material bin controls the position and orientation of the material bin 20 from the source. The middle guide strip 4, side guide strip 5, and rear stop strip 7 on the upper plate 3 regulate the transmission path of the lead frame. The reinforcing rib 19 effectively prevents mechanical deformation of the lifting bracket, and the protective sealing plate 23 prevents dust from interfering with the sensor detection accuracy. This series of structural designs collectively eliminates the random errors of manual operation, successfully solving the defects of unstable quality in traditional manual loading and unloading. Furthermore, the design of two lifting mechanisms operating in parallel, coupled with the efficient lifting action driven by servo, results in a working speed far faster than manual operation, significantly reducing waiting time. The entire device is made of lightweight materials such as aluminum profiles, and is equipped with protective components such as protective sealing plate 23 and wire trough sealing plate 24, which not only facilitates maintenance but also provides strong durability. This reduces labor costs, material losses, and equipment maintenance costs, perfectly meeting the core needs of enterprises to improve production efficiency and control production costs. At the same time, the simple and easy-to-understand operation method allows operators to get started after simple training, further adapting to the frequent picking and placing of lead frames in semiconductor packaging processes.

[0031] The above description of the embodiments is provided to enable those skilled in the art to understand and use the present invention. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. An automatic loading device for lead frame, characterized in that, include: Upper shelf, on which a shelf tray opening is provided; A material cassette bottom plate, which is spaced apart from the upper plate by a connector, and a bottom plate material cassette opening and a lifting opening are provided on the material cassette bottom plate; A lifting mechanism, which is connected to the upper plate; A control system that communicates with the lifting mechanism; in The lifting mechanism includes: Corner bracket, which is connected to the upper plate; A slide table fixing plate, which is connected to the corner bracket; A single-axis servo slide is mounted on the slide fixing plate, and a motor is provided on the single-axis servo slide. The motor communicates with the control system. A lifting pad is provided, which is connected to the slide table fixing plate via a lifting bracket. The position of the lifting pad corresponds to the position of the bottom plate material box opening.

2. The automatic loading device for lead frame according to claim 1, characterized in that, The number of lifting mechanisms is two, and the two lifting mechanisms are connected to the two sides of the upper plate in a mirror-like supporting manner.

3. The automatic loading device for lead frames according to claim 1 or 2, characterized in that, The lifting support includes: A lifting and fixing plate is mounted on the single-axis servo slide. The first lifting and fixing horizontal plate is connected at one end to the lifting and fixing vertical plate; The second lifting and fixing horizontal plate has one end connected to the other end of the first lifting and fixing horizontal plate, and the position of the second lifting and fixing horizontal plate corresponds to the position of the lifting port. The lifting pad is mounted on the second lifting fixing horizontal plate via a lifting fixing support plate; wherein The lifting and fixing vertical plate, the first lifting and fixing horizontal plate, and the second lifting and fixing horizontal plate surround the outside of the bottom plate of the material box.

4. The automatic loading device for lead frame according to claim 3, characterized in that, Reinforcing ribs are provided at the connection points of the first lifting fixing horizontal plate, the lifting fixing vertical plate, and the second lifting fixing horizontal plate.

5. The automatic loading device for lead frame according to claim 1, characterized in that, Two grooves are provided on the upper plate, and the two grooves are respectively located at both ends of the material box opening of the plate. A protective sealing plate is provided at the opening of the two grooves. A through-beam sensor is provided in each of the two grooves, and the through-beam sensor communicates with the control system.

6. The automatic loading device for lead frames according to claim 1, characterized in that, Multiple proximity sensors are provided on the bottom plate of the material hopper. The multiple proximity sensors are located at the end and side of the material hopper opening on the bottom plate, and the multiple proximity sensors communicate with the control system.

7. The automatic loading device for lead frames according to claim 1, characterized in that, Multiple lifting sensors are provided on the single-axis servo slide, and each of the multiple lifting sensors communicates with the control system.

8. The automatic loading device for lead frame according to claim 1, characterized in that, Multiple guide strips are provided on the lower surface of the upper plate, and the multiple guide strips are located on the side of the material box opening of the plate. A rear stop strip is provided at the end of the multiple guide strips.

9. The automatic loading device for lead frame according to claim 1, characterized in that, A groove sealing plate is provided on the lower surface of the upper plate.

10. The automatic loading device for lead frames according to claim 1, characterized in that, A limiting unit is provided on the bottom plate of the material box, the limiting unit comprising: A limiting and fixing seat is disposed on the bottom plate of the material box; A spring, wherein the spring is disposed within the limiting fixing seat; A limit handle is connected to the limit fixing seat via a limit rotation shaft.

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