Automated material weighing and transmission device
By employing a high-precision weighing sensor and a multi-structure collaborative design, the problem of large measurement errors in photoelectric through-beam sensors has been solved, enabling accurate weighing and automatic screening of molding compounds. This meets the requirements of high-precision semiconductor packaging and improves detection accuracy and screening efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI JUNGONG AUTOMATION TECH CO LTD
- Filing Date
- 2025-12-01
- Publication Date
- 2026-08-04
AI Technical Summary
In existing technologies, the beam diameter and scattering phenomenon of photoelectric through-beam sensors result in large errors in the measurement of molding compound weight, which cannot meet the requirements for high-precision detection, especially when there is a slight weight loss.
Employing high-precision weighing sensors and supporting automatic zeroing at specific working nodes, combined with positioning pins, sensor limit plates, and multi-structure collaborative design, it eliminates accumulated errors and achieves accurate weighing and automatic sorting.
It significantly improves the accuracy of molding compound weight detection, adapts to the needs of high-precision semiconductor packaging, automatically rejects unqualified materials, reduces human judgment errors, and improves screening efficiency and process stability.
Smart Images
Figure CN224590122U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mechanical automation technology, specifically an automated material weighing and transmission device. Background Technology
[0002] In the semiconductor packaging process, molding compound is typically used to encapsulate wafers, and the weight of the molding compound directly affects the encapsulation quality. Currently, automatic molding compound feeding machines often utilize photoelectric through-beam sensors to measure the height of the molding compound and determine whether it meets the usage requirements.
[0003] Existing photoelectric through-beam sensors have significant errors in measuring the height of the material due to beam diameter and scattering phenomena. When high requirements are met, they cannot satisfy the usage requirements, especially when the missing weight is small. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an automated material weighing transmission device that overcomes large measurement errors.
[0005] To solve the above-mentioned technical problems, this utility model provides an automated material weighing and transmission device, including a vertical plate and a receiving mechanism, a pushing mechanism, and a feeding mechanism disposed on the vertical plate; wherein the receiving mechanism includes: a receiving platform disposed on the vertical plate; a weighing sensor disposed on the receiving platform and communicating with a controller; a weighing plate disposed on the weighing sensor and having weighing grooves provided on the weighing plate; the pushing mechanism includes: a receiving cylinder connected to the vertical plate via a cylinder fixing block and communicating with the controller; a pushing rod base plate disposed on the working end of the receiving cylinder; and a pushing rod disposed on the pushing rod base plate via a pushing rod fixing plate; wherein the number and position of the weighing grooves correspond to the number and position of the pushing rods.
[0006] A cylindrical pin is provided on the weighing plate.
[0007] A first sensor limiting plate is provided on the upper surface of the receiving platform, and a second sensor limiting plate is provided on the lower surface of the weighing plate; wherein there is a gap between the working part of the first sensor limiting plate and the top end of the cylindrical pin, and there is a gap between the working part of the second sensor limiting plate and the lower surface of the weighing plate.
[0008] Positioning pins are provided on the receiving platform.
[0009] The feeding mechanism includes: a horizontal component disposed on the vertical plate and communicating with the controller; a vertical component disposed on the horizontal component and communicating with the controller; and a feeding unit disposed on the vertical component.
[0010] The lateral component includes a lateral cylinder, which is mounted on the vertical plate via a cylinder fixing plate, and the lateral cylinder communicates with the controller.
[0011] The vertical component includes: an L-shaped plate, one end of which is disposed on the horizontal cylinder; and a vertical cylinder, which is disposed on the other end of the L-shaped plate and communicates with the controller; wherein the material feeding unit is disposed on the working end of the vertical cylinder.
[0012] The feeding unit includes: a feeding claw, which is disposed on the working end of the vertical cylinder; and an anti-tipping plate, which is disposed on the feeding claw. The anti-tipping plate is U-shaped and forms an anti-tipping space with the feeding claw.
[0013] A reflective optical fiber is provided on the upright plate. The reflective optical fiber communicates with the controller, and the position of the reflective optical fiber corresponds to the position of the feeding unit.
[0014] A ash-receiving funnel is provided on the vertical plate, and the position of the ash-receiving funnel corresponds to the position of the weighing plate and the push rod.
[0015] This utility model relates to an automated material weighing and transmission device. Addressing the shortcomings of existing photoelectric through-beam sensors, which suffer from large measurement errors due to beam diameter and scattering, and cannot meet the high requirements for detecting minute weight loss in molding compounds, this device employs a high-precision weighing sensor and supports automatic zeroing at specific working nodes. This fundamentally avoids systematic errors and eliminates cumulative errors, significantly improving the accuracy of molding compound weight detection. Its high sensitivity allows for precise detection of minute weight loss, adapting to the needs of high-precision semiconductor packaging. Weight tolerances can be freely set according to process requirements. Through linkage with a controller, it automatically rejects unqualified materials, improving screening efficiency and avoiding human error. Simultaneously, positioning pins, first sensor limit plates, and second sensor limit plates define the material position; a dust collection funnel collects impurities; and a U-shaped anti-tipping plate on the feeding claw prevents material tipping. This multi-structure synergy ensures transmission and measurement stability, effectively meeting the high-quality detection and transmission requirements of molding compounds. Attached Figure Description
[0016] 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.
[0017] Figure 1 This is a schematic diagram of the automated material weighing transmission device of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the automated material weighing transmission device of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the receiving mechanism of the automated material weighing and transmission device of this utility model. Figure 1 ; Figure 4 This is a schematic diagram of the receiving mechanism of the automated material weighing and transmission device of this utility model. Figure 2 ; Figure 5 This is a schematic diagram of the pushing mechanism of the automated material weighing and transmission device of this utility model; Figure 6 This is a schematic diagram of the operation of the automated material weighing and transmission device of this utility model. Figure 1 ; Figure 7 This is a schematic diagram of the operation of the automated material weighing and transmission device of this utility model. Figure 2 ; Figure 8 This is a schematic diagram of the operation of the automated material weighing and transmission device of this utility model. Figure 3 ; Figure 9 This is a schematic diagram of the operation of the automated material weighing and transmission device of this utility model. Figure 4 ; Figure 10 This is a schematic diagram of the operation of the automated material weighing and transmission device of this utility model. Figure 5 ; Figure 11 This is a schematic diagram of the operation of the automated material weighing and transmission device of this utility model. Figure 6 .
[0018] Explanation of reference numerals in the accompanying drawings of this utility model's automated material weighing and transmission device: Detailed Implementation
[0019] 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.
[0020] 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.
[0021] 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.
[0022] In semiconductor packaging, the weight of the molding compound directly determines the molding quality, and accurately controlling the weight of the molding compound is a key step in ensuring the stability of the packaging process. Existing automatic molding compound feeding machines generally use photoelectric through-beam sensors to indirectly determine whether the molding compound meets the usage requirements by measuring the installation height. However, this method has significant drawbacks: the beam diameter and scattering phenomenon of the photoelectric through-beam sensor lead to large measurement errors, especially when facing high-precision detection requirements with small missing weights, making it impossible to meet usage standards. To address this technical pain point, this invention provides an automated material weighing and transmission device. Through high-precision structural design and intelligent control logic, it effectively overcomes the problems of large measurement errors and inability to adapt to small missing weight detection requirements in existing technologies, while simultaneously achieving automated weighing, screening, and conveying of molding compounds.
[0023] like Figures 1 to 11 As shown, the core of this utility model's automated material weighing and transmission device includes a vertical plate 1, and a receiving mechanism, a pushing mechanism, and a feeding mechanism integrated on the vertical plate 1. In addition, it is equipped with auxiliary components such as a focusing lens 21, an optical fiber support 22, a reflecting optical fiber 23, a dust receiving funnel 24, and a pressure plate 25. All mechanisms and auxiliary components work together to complete the entire process of receiving, weighing, screening, and conveying the molding compound. All components related to motion control and signal detection communicate with the controller to achieve automated and precise control.
[0024] The receiving mechanism, as the core unit for material carrying and weighing, mainly consists of a receiving platform 2, a weighing sensor 3, and a weighing plate 4. It is also equipped with positioning pins 13, cylindrical pins 10, a first sensor limiting plate 11, and a second sensor limiting plate 12. The first and second sensor limiting plates 11 and 12 are directly mounted on the receiving platform 2. These mechanical limiting devices prevent excessive displacement of the weighing plate 4 due to impact, thus avoiding damage to the weighing sensor 3 and ensuring operational stability and equipment safety. The receiving platform 2 is fixedly mounted on the vertical plate 1, and its surface is equipped with positioning pins 13. These positioning pins 13 limit the plastic sealant entering the receiving platform 2, effectively preventing the sealant from tipping over during transport. Weighing sensor 3 is mounted on receiving platform 2 and fixedly connected to weighing plate 4. It also communicates with the controller. Weighing sensor 3 employs a high-precision design, directly measuring the actual weight of the molding compound, avoiding errors caused by indirect measurement via height in existing technologies. Furthermore, it can be set by the controller to automatically zero at specific working points, effectively eliminating accumulated errors and further improving the accuracy of molding compound quality inspection. Simultaneously, operators can freely set the molding compound quality tolerance range through the controller according to different process requirements, providing flexible adaptability for packaging operations with different specifications and precision requirements. Weighing plate 4 has multiple weighing grooves 5. These grooves not only position the molding compound but also allow dust adhering to its surface to fall naturally, preventing dust accumulation from affecting weighing accuracy or contaminating the equipment. Two cylindrical pins 10 are provided on the upper surface of the weighing plate 4. A first sensor limiting piece 11 is fixed on the receiving platform 2 directly above the cylindrical pins 10. A very small gap is left between the working part of the first sensor limiting piece 11 and the top of the cylindrical pin 10. This gap does not affect the normal deformation of the weighing plate 4 during weighing, and can also limit the weighing sensor 3 by contacting the cylindrical pin 10 and the first sensor limiting piece 11 when the equipment is subjected to an upward external force impact, thus preventing the weighing sensor 3 from being damaged due to excessive upward deformation. A second sensor limiting piece 12 is also fixed on the lower surface of the receiving platform 2. A very small gap is also left between its working part and the lower surface of the weighing plate 4. This gap can limit the weighing sensor 3 by contacting the weighing plate 4 and the second sensor limiting piece 12 when the weighing sensor 3 is subjected to excessive downward pressure, thus preventing the weighing sensor 3 from being damaged due to excessive downward deformation. At the same time, it ensures that the second sensor limiting piece 12 will not contact the weighing plate 4 when the weighing sensor 3 deforms during normal weighing, so as not to affect the weighing accuracy at all.
[0025] The material pushing mechanism is mainly responsible for removing unqualified molding compound from the weighing plate 4. Its structure includes a receiving cylinder 6, a cylinder fixing block 7, a pusher rod base plate 8, a pusher rod 9, and a pusher rod fixing plate 16. The cylinder fixing block 7 is fixedly installed on the vertical plate 1. The receiving cylinder 6 is connected to the vertical plate 1 through the cylinder fixing block 7, and it communicates with the controller, which controls its action based on the weighing results. Notably, the receiving cylinder 6 also has two exhaust regulating valves and two magnetic switches fixed to it. The exhaust regulating valves precisely adjust the speed of the receiving cylinder 6's extension and retraction, preventing excessively fast movement that could cause collisions and damage to the molding compound during pushing, or excessively slow movement that could affect overall work efficiency. The magnetic switches detect the position of the piston inside the receiving cylinder 6. When the piston reaches its extended or retracted limit, the magnetic switches send a position signal to the controller in real time. The controller uses this signal to determine whether the receiving cylinder 6 has reached the designated position, thereby precisely controlling the start and stop timing of the pusher rod 9 to ensure stable and accurate pushing action. The push rod base plate 8 is fixedly mounted on the working end of the receiving cylinder 6. The push rod fixing plate 16 is installed in conjunction with the push rod base plate 8. After multiple push rods 9 pass through the push rod fixing plate 16, their heads rest on the side of the push rod base plate 8, ensuring that the push rods 9 are installed securely. The number and position of the push rods 9 correspond one-to-one with the weighing grooves 5 on the weighing plate 4. When the weighing sensor 3 detects that the mass of the molding material exceeds the set tolerance range, the controller will send a signal to control the receiving cylinder 6 to open. The receiving cylinder 6 drives the push rod base plate 8 and the push rod fixing plate 16 to drive the push rods 9 to move synchronously. The push rods 9 push the unqualified molding material along the weighing grooves 5 into the ash collection funnel 24 below, completing the automatic rejection of unqualified materials. After the rejection action is completed, the receiving cylinder 6 closes under the control of the controller and returns to its original position, waiting for the next rejection command. The whole process does not require manual intervention, improving screening efficiency and accuracy.
[0026] The feeding mechanism is responsible for conveying the molding compound from the receiving platform 2 to the weighing plate 4, and pushing the weighed molding compound forward to the subsequent operating mechanism. Its structure includes a horizontal component, a vertical component, and a feeding unit. The horizontal component consists of a horizontal cylinder 14 and a cylinder fixing plate 15. The cylinder fixing plate 15 is fixed on the vertical plate 1. The horizontal cylinder 14 is mounted on the cylinder fixing plate 15 and communicates with the controller. The horizontal cylinder 14 is also fixed with two exhaust regulating valves and two magnetic switches. The exhaust regulating valves can flexibly adjust the horizontal movement speed of the horizontal cylinder 14 according to the working rhythm to ensure that the molding compound is stable and does not shake during the horizontal conveying process. The magnetic switches monitor the position of the piston of the horizontal cylinder 14 and feed back the "extended to position" or "retracted to position" signal to the controller, providing a precise timing basis for the action of the vertical component and avoiding interference between the horizontal and vertical actions. The vertical assembly includes an L-shaped plate 17 and a vertical cylinder 18. One end of the L-shaped plate 17 is fixed to the horizontal cylinder 14 and moves horizontally synchronously with the horizontal cylinder 14. The vertical cylinder 18 is installed at the other end of the L-shaped plate 17 and communicates with the controller, enabling vertical extension and retraction. The vertical cylinder 18 is also fixed with two exhaust regulating valves and two magnetic switches: the exhaust regulating valves are used to control the speed of vertical extension and retraction of the vertical cylinder 18 to prevent the material-feeding claw 19 from crushing the molding material when it descends rapidly or from detaching from the material when it rises rapidly; the magnetic switches detect the extension and retraction position of the vertical cylinder 18. When the vertical cylinder 18 drives the material-feeding claw 19 to descend to the position of wrapping the molding material, or to the position of avoiding collision with other components, the magnetic switches feed back a signal to the controller to ensure that the material-feeding action is accurate and controllable. The feeding unit is installed on the working end of the vertical cylinder 18 and consists of a feeding claw 19 and an anti-tipping plate 20. The anti-tipping plate 20 has a U-shaped structure and is fixed to the feeding claw 19, forming a closed anti-tipping space together with the feeding claw 19. This space can wrap and limit the molding compound, effectively preventing it from tipping over during the conveying process. When the molding compound arrives at the receiving platform 2, the feeding mechanism completes a series of actions under the coordinated control of the controller to ensure smooth material conveying, while cooperating with the weighing mechanism to achieve continuous operation.
[0027] The design of auxiliary components further enhances the practicality and stability of the device. Fiber optic bracket 22 is fixedly mounted on the vertical plate 1, reflective fiber 23 is mounted on the fiber optic bracket 22, and focusing lens 21 is mounted on the head of reflective fiber 23. The position of focusing lens 21 corresponds to the position of the feeding unit. Reflective fiber 23 communicates with the controller, enabling precise detection of whether plastic sealant has arrived on the receiving platform 2, providing trigger signals for subsequent mechanism actions and ensuring the orderly connection of the operation process. The dust collection funnel 24 is set on the vertical plate 1, its position corresponding to the weighing plate 4 and the push rod 9. It not only collects the dust from the plastic sealant falling from the weighing trough 5 on the weighing plate 4, keeping the equipment clean and the working environment tidy, but also receives the unqualified plastic sealant rejected by the push rod 9 for centralized processing. A pressure plate 25 presses firmly against the inner wall of the dust collection funnel 24 and is fixed to the vertical plate 1, ensuring the dust collection funnel 24 is securely installed and preventing displacement or detachment due to vibration during equipment operation.
[0028] The working process of the automated material weighing and transmission device of this utility model is as follows: In the initial state, the vertical cylinder 18 is in the closed state (its magnetic switch feedback "retracted to position" signal), the receiving cylinder 6 is in the closed state (magnetic switch feedback "retracted to position" signal), and the horizontal cylinder 14 is in the open state (magnetic switch feedback "extended to position" signal). The exhaust regulating valve of each cylinder has been preset with the action speed according to the process requirements. When the first molding compound 26 arrives at the receiving platform 2, the reflective optical fiber 23 detects the material and immediately sends a signal to the controller. The controller first controls the vertical cylinder 18 to open (the exhaust regulating valve adjusts its slow descent). After the magnetic switch of the vertical cylinder 18 sends a "extended in place" signal, the feeding claw 19 wraps around the first molding compound 26. Then, the controller controls the horizontal cylinder 14 to close (the exhaust regulating valve adjusts its smooth movement). The horizontal cylinder 14 drives the L-shaped plate 17, the vertical cylinder 18, and the feeding claw 19 to move horizontally synchronously. When the magnetic switch of the horizontal cylinder 14 sends a "retracted in place" signal, the first molding compound 26 is just pushed onto the weighing plate 4. During this process, the dust adhering to the surface of the first molding compound 26 will naturally fall into the dust collection funnel 24 through the weighing groove 5 on the weighing plate 4, avoiding the dust affecting the weighing accuracy. After the first molding compound 26 arrives at the weighing plate 4, the weighing sensor 3 immediately and accurately measures its mass. Simultaneously, the controller controls the vertical cylinder 18 to close (the exhaust regulating valve adjusts its slow ascent). When the magnetic switch of the vertical cylinder 18 sends a "retracted" signal, the feeding claw 19 returns to its initial position. If the weighing sensor 3 detects that the mass of the first molding compound 26 exceeds the set tolerance range, the controller controls the receiving cylinder 6 to open (the exhaust regulating valve adjusts its uniform extension). The pusher rod 9 pushes the defective first molding compound 26 into the ash-receiving funnel 24. After the magnetic switch of the receiving cylinder 6 sends a "extended to position" signal, the controller controls the receiving cylinder 6 to close and reset until the magnetic switch sends a "retracted" signal. If the first molding compound 26 is of acceptable quality, the receiving cylinder 6 remains closed and does not perform a rejection action.
[0029] When the horizontal cylinder 14 is opened and reset under the control of the controller (the exhaust regulating valve adjusts its smooth extension, and the magnetic switch provides feedback of "extended in place"), and the reflective optical fiber 23 detects the arrival of the second molding compound 27 on the receiving platform 2 again, the controller repeats the above actions: first, it controls the vertical cylinder 18 to open (the magnetic switch provides feedback of "extended in place"), and the feeding claw 19 wraps around the second molding compound 27. At this time, the first qualified molding compound 26 enters the anti-tipping space formed by the feeding claw 19 and the anti-tipping plate 20; then the horizontal cylinder 14 closes (the magnetic switch provides feedback of "retracted in place"), and while the feeding claw 19 carries the second molding compound 27 towards the weighing plate 4, it pushes the first molding compound 26 forward. The anti-tipping plate 20 effectively prevents the first molding compound 26 from falling during the pushing process. This cycle repeats continuously, and qualified molding compounds are continuously pushed forward, while simultaneously achieving a 90° change in the direction of movement, facilitating subsequent connection operations with other working mechanisms. Throughout the entire operation, the weighing sensor 3 can automatically return to zero according to the preset working nodes, maintaining high-quality weighing accuracy at all times, effectively overcoming the shortcomings of large measurement errors in existing technologies. By freely setting the mass tolerance, it can accurately screen out unqualified materials and automatically remove them, meeting the high-requirement detection standards for small missing weights. The exhaust regulating valves and magnetic switches on the receiving cylinder 6, the horizontal cylinder 14, and the vertical cylinder 18 provide stable guarantees for the coordinated operation of each mechanism from the aspects of "action speed adjustment" and "precise position detection," respectively. Together with the controller, it realizes fully automated operation, which not only reduces the errors and labor intensity caused by manual intervention, but also greatly improves the operation efficiency and process stability, providing reliable technical support for the quality control of molding compounds in the semiconductor packaging process.
[0030] 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 automated material weighing and transmission device, characterized in that, It includes a vertical plate and a receiving mechanism, a pushing mechanism and a feeding mechanism disposed on the vertical plate; in The receiving mechanism includes: A receiving platform, which is mounted on the upright plate; A weighing sensor is installed on the receiving platform and communicates with the controller; A weighing plate, which is mounted on the weighing sensor and has a weighing groove; The pushing mechanism includes: A receiving cylinder is connected to the vertical plate via a cylinder fixing block, and the receiving cylinder communicates with the controller; A push rod base plate, wherein the push rod base plate is disposed on the working end of the receiving cylinder; The push rod is mounted on the push rod base plate via a push rod fixing plate; wherein... The number and position of the weighing troughs correspond to the number and position of the push rods.
2. The automated material weighing and transmission device according to claim 1, characterized in that, A cylindrical pin is provided on the weighing plate.
3. The automated material weighing and transmission device according to claim 2, characterized in that, A first sensor limiting plate is provided on the upper surface of the receiving platform, and a second sensor limiting plate is provided on the lower surface of the weighing plate; wherein A gap is provided between the working part of the first sensor limiting plate and the top end of the cylindrical pin, and a gap is provided between the working part of the second sensor limiting plate and the lower surface of the weighing plate.
4. The automated material weighing and transmission device according to claim 1, characterized in that, Positioning pins are provided on the receiving platform.
5. The automated material weighing transmission device according to claim 1, characterized in that, The feeding mechanism includes: A horizontal component is disposed on the vertical plate and communicates with the controller. A vertical component is disposed on the horizontal component, and the vertical component communicates with the controller; A material feeding unit is disposed on the vertical component.
6. The automated material weighing transmission device according to claim 5, characterized in that, The lateral component includes a lateral cylinder, which is mounted on the vertical plate via a cylinder fixing plate, and the lateral cylinder communicates with the controller.
7. The automated material weighing transmission device according to claim 6, characterized in that, The vertical component includes: An L-shaped plate, one end of which is mounted on the transverse cylinder; A vertical cylinder is mounted on the other end of the L-shaped plate and communicates with the controller; wherein... The feeding unit is located on the working end of the vertical cylinder.
8. The automated material weighing transmission device according to claim 7, characterized in that, The feeding unit includes: A feeding claw, wherein the feeding claw is disposed on the working end of the vertical cylinder; An anti-tipping plate is provided on the feeding claw. The anti-tipping plate is U-shaped and forms an anti-tipping space with the feeding claw.
9. The automated material weighing transmission device according to any one of claims 5 to 8, characterized in that, A reflective optical fiber is provided on the upright plate. The reflective optical fiber communicates with the controller, and the position of the reflective optical fiber corresponds to the position of the feeding unit.
10. The automated material weighing transmission device according to claim 1, characterized in that, A ash-receiving funnel is provided on the vertical plate, and the position of the ash-receiving funnel corresponds to the position of the weighing plate and the push rod.