Automatic weighing equipment for modified starch packaging

By designing automated weighing equipment for packaging of denatured starch, using the continuous cycle movement of the feeding box and the weight detector, the problem of discontinuous material supply in traditional weighing methods is solved, and the production efficiency and product quality are improved.

CN118953752BActive Publication Date: 2024-12-31ZHU CHENG XING MAO CORN DEVELOPING CO LTD
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Patent Information

Application Number
CN202411455066.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-18
Publication Date
2024-12-31
Estimated Expiration
2044-10-18

AI Technical Summary

Technical Problem

Traditional weighing methods cannot achieve continuous supply of materials in food processing, resulting in low working efficiency and frequent feeding and shutting down operations, which cannot ensure the accuracy and consistency of weight.

Method used

An automatic weighing equipment is designed, including two side substrates, feeding pipes and multiple feeding boxes. Through the cooperation of the annular chute and slide column, the continuous cyclic movement of the feeding box is realized, combining the weight detector and power. The unit realizes automated material feeding, weighing and lifting, avoids frequent pauses and improves work efficiency.

Benefits of technology

The continuous supply and weighing of materials is achieved, which significantly improves work efficiency, reduces manual intervention, reduces operator labor intensity, and improves product quality.

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Abstract

The present invention relates to the technical field of weighing equipment, and in particular to an automatic weighing equipment for modified starch packaging, comprising two side base plates and a feeding pipe, wherein the two side base plates are both vertical and opposite to each other in a horizontal direction, and an annular chute is provided on the side wall of each side base plate, the annular chute is in a capsule shape, and the center line of the annular chute is vertical; the equipment realizes continuous supply and weighing of materials through continuous cyclic motion of multiple material receiving boxes, avoids time waste caused by frequent pauses in traditional methods, greatly improves work efficiency, and reduces manual intervention and the labor intensity of operators through automated weighing, lifting and releasing work.
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Description

Technical Field

[0001] The invention relates to the technical field of weighing equipment, in particular to an automatic weighing equipment for modified starch packaging. Background Art

[0002] With the continuous development of the food processing industry, the quality control requirements for raw materials and finished products are becoming higher and higher. Modified starch, as an important food additive, is widely used in baking, candy manufacturing, frozen food and other fields. It can not only improve the taste and appearance of food, but also extend the shelf life of food. In order to ensure the consistency and accuracy of modified starch in the production process, especially in the packaging process, the weight of modified starch needs to be precisely controlled.

[0003] The traditional weighing method is to pour the material into a container and weigh the container using equipment such as a floor scale or an electronic scale. When the weighed weight reaches the specified value, the feeding is stopped, and the material in the container is exported to the packaging structure. The container is then placed back on the weighing equipment to repeat the weighing work. However, this weighing method cannot achieve continuous supply of materials, that is, it cannot achieve continuous weighing of materials, and its work efficiency is low because it requires frequent feeding and stopping operations. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an automatic weighing device for modified starch packaging, and the specific technical solution adopted is:

[0005] An automatic weighing device for modified starch packaging, comprising two side base plates and a feeding pipe, the two side base plates are both vertical and opposite to each other in the horizontal direction, an annular chute is provided on the side wall of each side base plate, the annular chute is in a capsule shape, the center line of the annular chute is vertical, a plurality of slide posts are slidably arranged in the annular chute, a plurality of material receiving boxes are arranged between the two side base plates, the opening of the material receiving box faces upward, and the material receiving box is used to hold materials, two slide posts at opposite positions on the two side base plates are respectively connected to the front and rear side walls of the material receiving box, and the two slide posts on the material receiving box are staggered in the horizontal plane;

[0006] A strap is fixed on the outer wall of each receiving box, a fixed plate is fixed on the side wall of one of the side base plates, a weight detector is arranged on the fixed plate, a support column is rotatably arranged on the weight detector, a support plate is fixed on the outer wall of the support column, the support plate cooperates with the strap on the receiving box and lifts the receiving box;

[0007] Among them, the feeding pipe is used to feed materials into the material receiving box.

[0008] Furthermore, each of the side base plates is provided with a power unit, and the power unit is used to drive multiple slide columns to move in the annular slide groove. The power unit includes two transmission wheels rotatably installed on the side base plates, and the two transmission wheels are connected by a transmission belt. Multiple connecting rods are provided on the transmission belt, and the connecting rods are rotatably connected to the slide columns. A first motor for providing power for the rotation of the transmission wheel is fixed on the side base plate.

[0009] Furthermore, a slider is provided between the slide post and the material receiving box, the slider is vertically slidably installed on the side wall of the material receiving box, and the slider is fixedly connected to the slide post, a slide rod is vertically slidably inserted on the slider, and support plates are respectively provided at both ends of the slide rod, and the support plates are fixed on the material receiving box;

[0010] Wherein, an elastic structure for buffering the sliding block is arranged on the sliding rod.

[0011] Furthermore, the elastic structure includes a sealing disk fixed on the outer wall of the sliding rod, an air vent is opened on the circumferential outer wall of the sealing disk, a moving cylinder is sleeved on the outer side of the sealing disk, the sliding rod passes through the moving cylinder and slides relatively, the opening of the moving cylinder faces upward, the sealing disk can slide relatively in the moving cylinder, and the sealing disk and the moving cylinder are connected by a spring.

[0012] Furthermore, the material receiving box has a square shape, the internal shape of the material receiving box is a cone bucket, and a discharge port is arranged at the lowest point of the cone bucket, and an opening and closing structure for controlling the discharge port is arranged at the bottom of the material receiving box.

[0013] Furthermore, the opening and closing structure includes a cover plate installed on the discharge port at the bottom of the receiving box, a filling block is arranged on the cover plate, the filling block is slidably inserted into the discharge port, a cylinder is fixed at the bottom of the receiving box, and the movable end of the cylinder is connected to the cover plate by a push-pull rod.

[0014] Furthermore, the opening and closing structure also includes a vertical pole fixed to the bottom of the receiving box, a movable sleeve is slidably sleeved on the vertical pole, a limiting protrusion is arranged at the bottom of the vertical pole, the cover plate is rotatably mounted on the movable sleeve, and the cover plate and the movable sleeve are connected by a spring sheet, and a retaining edge is arranged on the movable sleeve for blocking and limiting the cover plate;

[0015] Wherein, two ends of the push-pull rod are rotatably connected with the cover plate and the cylinder respectively.

[0016] Furthermore, a square hole is opened inside the support column along its axial direction, a polygonal shaft is slidably inserted into the square hole, a second motor is arranged on the polygonal shaft, and the second motor is fixed on the side substrate.

[0017] The advantages of the present invention are:

[0018] The equipment realizes continuous supply and weighing of materials through the continuous circulation movement of multiple receiving boxes, avoiding the time waste caused by frequent pauses in traditional methods, greatly improving work efficiency, and reducing manual intervention and the labor intensity of operators through automated weighing, lifting and releasing. The feeding pipe continuously supplies materials to the receiving box at the receiving position, so that the entire system can complete the continuous weighing process without stopping, speeding up the overall process. In summary, this new type of automatic weighing equipment for modified starch packaging not only solves the problems existing in traditional weighing methods through its unique design, but also significantly improves production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of the middle side substrate;

[0022] Figure 3 yes Figure 1 Schematic diagram of the enlarged structure of the middle support plate;

[0023] Figure 4 yes Figure 1 Schematic diagram of the enlarged structure of the center material box;

[0024] Figure 5 yes Figure 4 Schematic diagram of the structure from top view;

[0025] Figure 6 yes Figure 4 Schematic diagram of the structure viewed from above;

[0026] Figure 7 yes Figure 4 The middle slider enlarges the structural diagram;

[0027] 1. The cam frame is provided with a plurality of support rods, each of which is provided with a plurality of support rods, and each of which is provided with a plurality of support rods. The support rods are provided with a plurality of support rods, each of which is provided with a plurality of support rods, and each of which is provided with a plurality of support rods. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. This embodiment is written in a progressive manner.

[0031] like Figures 1 to 7 As shown, an automatic weighing device for modified starch packaging of the present invention comprises two side base plates 1 and a feeding pipe 33, the two side base plates 1 are both vertical, and the two side base plates 1 are opposite to each other in the horizontal direction, an annular chute 2 is provided on the side wall of each side base plate 1, the shape of the annular chute 2 is capsule-shaped, the center line of the annular chute 2 is vertical, a plurality of slide posts 3 are slidably arranged in the annular chute 2, a plurality of material receiving boxes 4 are arranged between the two side base plates 1, the opening of the material receiving box 4 faces upward, and the material receiving box 4 is used to hold materials, two slide posts 3 at relative positions on the two side base plates 1 are respectively connected to the front and rear side walls of the material receiving box 4, and the two slide posts 3 on the material receiving box 4 are staggered in the horizontal plane;

[0032] A strap 5 is fixed on the outer wall of each receiving box 4, a fixing plate 6 is fixed on the side wall of one of the side base plates 1, a weight detector 7 is arranged on the fixing plate 6, a support column 8 is rotatably arranged on the weight detector 7, a support plate 9 is fixed on the outer wall of the support column 8, and the support plate 9 cooperates with the strap 5 on the receiving box 4 and lifts the receiving box 4;

[0033] The feeding pipe 33 is used to feed materials into the material receiving box 4 .

[0034] In detail, the feeding pipe 33 is vertically downward and used for feeding materials. The feeding pipe 33 is located on the side of the side base plate 1. Since the shape of the annular slide groove 2 is capsule-shaped and the center line of the annular slide groove 2 is vertical, the left and right sides of the annular slide groove 2 are both vertical, and the sliding column 3 moves along the trajectory of the annular slide groove 2, thereby driving the receiving box 4 to move along the trajectory of the annular slide groove 2. The left and right sides of the movement trajectory of the receiving box 4 are both vertical, one of the vertical areas is used to make the receiving box 4 move upward and discharge materials, and the other vertical area is used to make the receiving box 4 move downward and receive materials. The feeding pipe 33 is located on the material receiving side. Since the two side base plates 1 are misaligned, the positions of the two sliding columns 3 on the material receiving box 4 are also misaligned. Therefore, when the two sliding columns 3 move in the corresponding two annular slide grooves 2 respectively, the two sliding columns 3 can provide power for the movement of the receiving box 4, and they play a guiding role for the connecting material box 4, so that the receiving box 4 maintains translational motion, and the opening of the receiving box 4 is always facing upward and used for receiving materials.

[0035] When weighing materials, the receiving box 4 moves to the right side of its movement trajectory and moves downward to the position of the support plate 9. At this time, the strap 5 on the receiving box 4 abuts against the support plate 9, and the support plate 9 intercepts the strap 5 and the receiving box 4. The weight detector 7 weighs the receiving box 4 through the support column 8 and the support plate 9, and the feed pipe 33 continuously discharges the material downward into the receiving box 4. The weight of the material in the receiving box 4 increases. When the weight of the material weighed by the weight detector 7 reaches the specified value, the receiving box 4 adjacent to the receiving box 4 on the upper side of the receiving box 4 moves horizontally to the bottom of the feed pipe 33 and receives the material. At this time, the material cannot fall into the support plate 9. The supporting column 8 is rotated in the receiving box 4 on the plate 9, and the supporting column 8 can drive the pallet 9 to deviate from the strap 5, so that the weighed material and the receiving box 4 continue to move downward, the pallet 9 is reset, and the receiving box 4 in the receiving state moves down to the pallet 9 and weighs the material in the receiving box 4. When the material moves to the unloading position, the receiving box 4 discharges the material and moves it back to the receiving position. Thus, with the continuous rotation of multiple receiving boxes 4, a continuous material receiving and weighing working mode is realized. In this process, the feeding pipe 33 can continuously discharge the material, thereby improving the working efficiency.

[0036] The equipment realizes continuous supply and weighing of materials through the continuous circulation movement of multiple material receiving boxes 4, avoids the time waste caused by frequent pauses in traditional methods, greatly improves work efficiency, and reduces manual intervention and the labor intensity of operators through automated weighing, lifting and releasing work; the feed pipe 33 continuously supplies material to the material receiving box 4 at the material receiving position, so that the entire system can complete the continuous weighing process without stopping, speeding up the overall process; in summary, this new type of automatic weighing equipment for modified starch packaging, through its unique design, not only solves the problems existing in traditional weighing methods, but also significantly improves production efficiency and product quality.

[0037] Furthermore, each of the side base plates 1 is provided with a power unit, and the power unit is used to drive multiple slide columns 3 to move in the annular slide groove 2. The power unit includes two transmission wheels 10 rotatably installed on the side base plates 1, and the two transmission wheels 10 are connected by a transmission belt 11. The transmission belt 11 is provided with multiple connecting rods 12, and the connecting rods 12 are rotatably connected to the slide columns 3. A first motor 13 for providing power for the rotation of the transmission wheel 10 is fixed on the side base plate 1.

[0038] In detail, the first motor 13 can drive the two transmission wheels 10 and the transmission belt 11 to operate synchronously. The transmission belt 11 drives the sliding column 3 to move in the annular slide groove 2 through the connecting rod 12, thereby providing power for the movement of multiple material receiving boxes 4. The transmission belts 11 on the two side base plates 1 move synchronously in the same direction, so that the material receiving boxes 4 maintain a translational motion state.

[0039] Furthermore, a slider 14 is provided between the slide post 3 and the material receiving box 4. The slider 14 is vertically slidably installed on the side wall of the material receiving box 4, and the slider 14 is fixedly connected to the slide post 3. A slide rod 15 is vertically slidably inserted on the slider 14. Support plates 16 are respectively provided at both ends of the slide rod 15, and the support plates 16 are fixed on the material receiving box 4.

[0040] The slide bar 15 is provided with an elastic structure for buffering the slide block 14 .

[0041] In detail, since the transmission belt 11 drives multiple slide columns 3 to continuously rotate, when the support plate 9 blocks the strap 5, the material receiving box 4 stops moving. At this time, the slide column 3 will drive the slider 14 to slide relative to the material receiving box 4, thereby ensuring that the transmission belt 11 is in a continuous motion state while ensuring that the material receiving box 4 is stationary and receiving materials, and the support plate 16 supports the slide rod 15.

[0042] Furthermore, the elastic structure includes a sealing disk 17 fixed on the outer wall of the sliding rod 15, and an air vent 18 is opened on the circumferential outer wall of the sealing disk 17. A moving cylinder 19 is sleeved on the outer side of the sealing disk 17. The sliding rod 15 passes through the moving cylinder 19 and slides relatively. The opening of the moving cylinder 19 faces upward, and the sealing disk 17 can slide relatively in the moving cylinder 19. The sealing disk 17 and the moving cylinder 19 are connected by a spring 20.

[0043] In detail, when the material receiving box 4 receives materials, the material receiving box 4 is stationary. At this time, the slider 14 moves downward relative to the material receiving box 4. When the support plate 9 deviates from the strap 5, the material receiving box 4 drops due to gravity. At this time, the slider 14 moves upward relative to the material receiving box 4. When the slider 14 contacts the bottom of the moving cylinder 19, the slider 14 squeezes the moving cylinder 19, and the moving cylinder 19 moves upward relative to the sealing disk 17. The space between the moving cylinder 19 and the sealing disk 17 is reduced, and the air in the space can be discharged through the air vent 18. Due to the caliber limitation of the air vent 18, the air in the moving cylinder 19 cannot be discharged in time and quickly, thereby utilizing air to achieve a buffering effect on the slider 14 and the material receiving box 4. Moreover, compared with the method of directly utilizing a spring, this method will not generate a large rebound force, thereby preventing the material receiving box 4 from jumping on the slider 14 and causing the material in the material receiving box 4 to spill out.

[0044] The spring 20 can be used to reset the moving cylinder 19 on the closing disk 17 .

[0045] Furthermore, the material receiving box 4 has a square shape, the internal shape of the material receiving box 4 is a cone hopper 21, and a discharge port is set at the lowest point of the cone hopper 21, and an opening and closing structure for controlling the discharge port is set at the bottom of the material receiving box 4.

[0046] In detail, by making the shape of the receiving box 4 square, it is convenient to provide installation positions for the staggered sliders 14, slide rods 15, support plates 16 and elastic structures on the receiving box 4. By making the internal shape of the receiving box 4 a cone hopper 21, it is convenient to gather materials toward the discharge port position, which is convenient for discharging. The opening and closing structure at the bottom of the receiving box 4 can be used to control the opening and closing of the discharge port.

[0047] Furthermore, the opening and closing structure includes a cover plate 22 mounted on the discharge port at the bottom of the receiving box 4, a filling block 23 is provided on the cover plate 22, and the filling block 23 is slidably inserted into the discharge port. A cylinder 29 is fixed to the bottom of the receiving box 4, and the movable end of the cylinder 29 is connected to the cover plate 22 by a push-pull rod 30.

[0048] In detail, the filling block 23 can be filled in the discharge port, and the cover plate 22 can be covered on the discharge port, thereby utilizing the cover plate 22 and the filling block 23 to achieve a double sealing effect on the discharge port, and the telescopic movement of the cylinder 29 can drive the cover plate 22 and the filling block 23 to move through the push-pull rod 30, thereby controlling the discharge port to be opened or closed.

[0049] Furthermore, the opening and closing structure also includes a vertical rod 24 fixed to the bottom of the receiving box 4, a movable sleeve 25 is slidably sleeved on the vertical rod 24, a limiting protrusion 26 is provided at the bottom of the vertical rod 24, the cover plate 22 is rotatably mounted on the movable sleeve 25, and the cover plate 22 and the movable sleeve 25 are connected by a spring sheet 27, and a retaining edge 28 is provided on the movable sleeve 25 for blocking and limiting the cover plate 22;

[0050] The two ends of the push-pull rod 30 are rotatably connected to the cover plate 22 and the cylinder 29 respectively.

[0051] In detail, due to the action of the spring piece 27, in the natural state, the cover plate 22 is tightly attached to the retaining edge 28. When the discharge port needs to be opened, the cylinder 29 extends, and the cylinder 29 pulls the cover plate 22 and the filling block 23 downward through the push-pull rod 30. The cover plate 22 drives the movable sleeve 25 downward through the spring piece 27 and the retaining edge 28, and the movable sleeve 25 slides on the vertical rod 24. When the movable sleeve 25 moves to the position of the limiting protrusion 26, the movable sleeve 25 stops moving. At this time, the cylinder 29 continues to extend, and the cylinder 29 can pull the cover plate 22 and the filling block 23 to rotate on the movable sleeve 25 through the push-pull rod 30, so that the cover plate 22 and the filling block 23 flip over and deviate from the discharge port, thereby preventing the cover plate 22 and the filling block 23 from blocking the falling materials discharged from the discharge port.

[0052] Furthermore, a square hole is opened inside the support column 8 along the axial direction thereof, a polygonal shaft 32 is slidably inserted into the square hole, a second motor 31 is arranged on the polygonal shaft 32 , and the second motor 31 is fixed on the side substrate 1 .

[0053] In detail, the second motor 31 can drive the support column 8 to rotate through the polygonal shaft 32, thereby controlling the position of the pallet 9. Since the pallet 9 needs to carry the materials in the raft 5 and the receiving box 4, and the weight detector 7 needs to measure the weight carried by the pallet 9, the polygonal shaft 32 and the support column 8 need to be slidably connected to each other.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An automatic weighing device for modified starch packaging, characterized in that: The invention comprises two side base plates (1) and a feeding pipe (33), wherein the two side base plates (1) are both vertical and face each other in the horizontal direction, and an annular chute (2) is provided on the side wall of each side base plate (1), wherein the annular chute (2) is in the shape of a capsule, and the center line of the annular chute (2) is vertical, and a plurality of sliding columns (3) are slidably arranged in the annular chute (2), and a plurality of material receiving boxes (4) are arranged between the two side base plates (1), wherein the opening of the material receiving boxes (4) faces upward and the material receiving boxes (4) are used to hold materials, and two sliding columns (3) at opposite positions on the two side base plates (1) are respectively connected to the front and rear side walls of the material receiving boxes (4), and the two sliding columns (3) on the material receiving boxes (4) are staggered in the horizontal plane; A strap (5) is fixed on the outer wall of each receiving box (4); a fixing plate (6) is fixed on the side wall of one of the side base plates (1); a weight detector (7) is arranged on the fixing plate (6); a support column (8) is rotatably arranged on the weight detector (7); a support plate (9) is fixed on the outer wall of the support column (8); the support plate (9) cooperates with the strap (5) on the receiving box (4) and lifts the receiving box (4); The feed pipe (33) is used to feed materials into the material receiving box (4); A power unit is provided on each of the side base plates (1), and the power unit is used to drive the plurality of slide columns (3) to move in the annular slide groove (2). The power unit comprises two transmission wheels (10) rotatably mounted on the side base plates (1), and the two transmission wheels (10) are connected to each other via a transmission belt (11). The transmission belt (11) is provided with a plurality of connecting rods (12), and the connecting rods (12) are rotatably connected to the slide columns (3). A first motor (13) for providing power for the rotation of the transmission wheels (10) is fixed on the side base plates (1); A sliding block (14) is provided between the sliding column (3) and the material receiving box (4), the sliding block (14) is vertically slidably mounted on the side wall of the material receiving box (4), and the sliding block (14) is fixedly connected to the sliding column (3), a sliding rod (15) is vertically slidably inserted through the sliding block (14), and support plates (16) are respectively provided at both ends of the sliding rod (15), and the support plates (16) are fixed on the material receiving box (4); The slide bar (15) is provided with an elastic structure for providing a buffer to the slide block (14).

2. The automatic weighing device for modified starch packaging according to claim 1, characterized in that: The elastic structure comprises a sealing disk (17) fixed on the outer wall of the sliding rod (15), an air vent (18) being provided on the circumferential outer wall of the sealing disk (17), a moving cylinder (19) being sleeved on the outer side of the sealing disk (17), the sliding rod (15) passing through the moving cylinder (19) and sliding relatively thereto, the opening of the moving cylinder (19) facing upward, the sealing disk (17) being able to slide relatively therein, and the sealing disk (17) and the moving cylinder (19) being connected via a spring (20).

3. The automatic weighing device for modified starch packaging according to claim 2, characterized in that: The material receiving box (4) has a square shape, the internal shape of the material receiving box (4) is a cone bucket (21), a discharge port is arranged at the lowest point of the cone bucket (21), and an opening and closing structure for controlling the discharge port is arranged at the bottom of the material receiving box (4).

4. The automatic weighing device for modified starch packaging according to claim 3, characterized in that: The opening and closing structure comprises a cover plate (22) mounted on a discharge opening at the bottom of the material receiving box (4), a filling block (23) being arranged on the cover plate (22), the filling block (23) being slidably inserted into the discharge opening, a cylinder (29) being fixed at the bottom of the material receiving box (4), and a movable end of the cylinder (29) and the cover plate (22) being connected via a push-pull rod (30).

5. The automatic weighing device for modified starch packaging according to claim 4, characterized in that: The opening and closing structure further comprises a vertical rod (24) fixed to the bottom of the material receiving box (4); a movable sleeve (25) is slidably sleeved on the vertical rod (24); a limiting protrusion (26) is provided at the bottom of the vertical rod (24); the cover plate (22) is rotatably mounted on the movable sleeve (25); the cover plate (22) and the movable sleeve (25) are connected via a spring sheet (27); and a retaining edge (28) is provided on the movable sleeve (25) for blocking and limiting the cover plate (22); The two ends of the push-pull rod (30) are rotatably connected to the cover plate (22) and the cylinder (29) respectively.

6. The automatic weighing device for modified starch packaging according to claim 5, characterized in that: A square hole is provided inside the support column (8) along its axial direction, a polygonal shaft (32) is slidably inserted into the square hole, a second motor (31) is arranged on the polygonal shaft (32), and the second motor (31) is fixed on the side base plate (1).