A mixer

Abstract

The utility model relates to a kind of mixers, including rack body, rack body lower side installation is used for material bag conveying belt conveyor, rack body top surface middle part is fixed with support, support inside is equipped with first metering bin for aggregate temporary storage, first metering bin upper end feeding position is equipped with chute, plug valve one is also installed on chute, first metering bin directly below is equipped with guide bin, adjustable discharging component for controlling aggregate flow rate is installed between guide bin and first metering bin, at least one spiral feeding assembly is provided in guide bin side face.The utility model integrates first metering bin, spiral feeding assembly and adjustable discharging component, realizes the synchronous metering and direct mixing of multiple materials, without additional pre-mixing process and auxiliary equipment, compared with the complex process of "pre-mixing + secondary mixing" in the prior art, not only reduces production steps and equipment investment cost, but also avoids material loss, proportion deviation problem in pre-mixing process.

Description

Technical Field

[0001] This utility model relates to the field of mixed packaging technology, and in particular to a mixing machine. Background Technology

[0002] In the production and processing of granular and powdered materials (such as chemical raw materials, food additives, feed ingredients, etc.), material mixing is a key step to ensure the uniformity of the final product quality, and the mixed material needs to be quickly transferred to the packaging process to improve production efficiency.

[0003] Existing mixers have the following technical defects: Firstly, most mixing equipment has high requirements for the initial state of materials. It is necessary to first manually or with auxiliary equipment to premix various raw materials in proportion before feeding them into the main mixer for secondary mixing. This not only increases the production steps and equipment investment costs, but may also affect the accuracy of subsequent mixing due to material loss and proportion deviation during the premixing process.

[0004] Secondly, some mixers use a single stirring or screw conveyor mixing structure, which makes it easy for materials to stratify and agglomerate within the machine. This is especially true for materials with large density differences or uneven particle size, making it difficult to achieve full diffusion and fusion of the components. As a result, the uniformity of the final mixture cannot meet the requirements of high-precision production.

[0005] Third, existing equipment often separates mixing and packaging into independent processes. The mixed materials need to be temporarily stored in a transfer warehouse before being transferred to the packaging machine via conveying equipment. There is a risk of material retention and secondary contamination in the intermediate links, and the overall production process has poor continuity, which greatly reduces the packaging efficiency per unit time and makes it difficult to adapt to large-scale continuous production scenarios.

[0006] Therefore, the industry urgently needs a mixing technology that does not require pre-mixing, can improve mixing uniformity, and can efficiently connect with packaging processes to solve the problems of cumbersome and inefficient existing processes. Utility Model Content

[0007] The purpose of this utility model is to...

[0008] To achieve the above objectives, the present invention provides the following technical solution: a mixing machine, including a frame body, a belt conveyor for conveying material bags is installed on the lower side of the frame body, a support is fixed in the middle of the top surface of the frame body, a first metering bin for temporary storage of aggregates is installed inside the support, a chute is installed at the upper feed position of the first metering bin, and a slide valve is also installed on the chute. A guide bin is located directly below the first metering bin. An adjustable feeding assembly for controlling the aggregate flow rate is installed between the guide bin and the first metering bin. At least one screw feeding assembly is provided on the side of the guide bin. A screw conveyor is provided on the upper side of the screw feeding assembly. The output end of the screw conveyor is connected to the feed end of the screw feeding assembly through a steel pipe. A second slide valve is also installed on the steel pipe. An adjustable speed airlock assembly is installed at the output end of the feed hopper, and a bag clamping assembly for clamping the bag opening when packing the bag is installed on the lower side of the airlock assembly.

[0009] Furthermore, the adjustable feeding assembly includes a valve body, with a chute 1 and a chute 2 extending through the middle of the valve body. A dust suction pipe is connected through one side of the valve body. A transition pipe is rotatably connected to the inner side of the valve body. A support is welded to the outer wall of one side of the valve body. A Y-type connector 1 is installed at the bottom of the support. A square cylinder body is rotatably installed on the Y-type connector 1. A rocker arm 1 is rotatably connected between the output end of the square cylinder body and the transition pipe. The outer wall of the middle part of the transition pipe extends to the inner side of the chute 1 and the chute 2. An arc-shaped door for opening and closing the chute 1 and the chute 2 is fixed in the middle of the transition pipe. The chute 1 is located at the upper end of the chute 2. The chute 1 is square and bucket-shaped. The chute 2 is long and rectangular. The chute 1 and the chute 2 are smoothly connected and have an arc transition section. The chute 1 is connected through to the output end of the first metering chamber.

[0010] Furthermore, the spiral feeding assembly includes a horizontal motor, a conveying cylinder, and a second metering hopper. One end of the conveying cylinder is connected to the upper side wall of the guide hopper. A sealing seat is provided in the middle of the conveying cylinder. A conveying shaft is rotatably installed on the inner wall of one side of the sealing seat. The end of the conveying shaft away from the sealing seat extends to the outside of the conveying cylinder and is connected to the output end of the horizontal motor via a V-belt. A spiral blade is fixed to the end of the conveying shaft away from the V-belt. The lower end of the second metering hopper is connected to the conveying cylinder and is located near the sealing seat. The horizontal motor, the conveying cylinder, the second metering hopper, and the guide hopper are all fixed on the frame body.

[0011] Furthermore, the air-closing assembly includes a shell that runs vertically through the interior. A drive shaft is rotatably connected to the center of the inner walls on both sides of the shell. A partition is fixed to the outer wall of the drive shaft. A micro cycloidal pinwheel reducer is provided on one side of the shell. The micro cycloidal pinwheel reducer is rotatably connected to the drive shaft via a coupling. The shell is sleeved and fixed to the bottom side of the guide hopper. Six partitions are provided and evenly distributed in pairs on the outer wall of the drive shaft. When each pair of partitions rotates to the horizontal position, they fit against the inner wall of the shell to achieve closure.

[0012] Furthermore, the bag clamping assembly includes a feeding cylinder, with positioning blocks fixed at the four corners of the feeding cylinder. Each positioning block is rotatably connected to a rocker arm II. A Y-type connector II is rotatably installed on the top of each of the rear rocker arms II near the feeding cylinder. A cylinder is installed between each Y-type connector II and the front rocker arm II. A clamping half-ring is fixed at the lower end of each of the front and rear rocker arms II. A rubber sealing strip is fixed at one end of each of the two clamping half-rings that are close to each other. The cylinder is rotatably connected to the Y-type connector II and the rocker arm II through a hinge seat.

[0013] A mixing method for a mixer, comprising: Step 1: Input the materials to be mixed into the first metering bin and the screw conveyor respectively through the chute and screw conveyor. After the set weight is reached, stop feeding and close both gate valve 1 and gate valve 2. Step 2: The worker puts the packaging bag onto the bag clamping assembly, which clamps the bag tightly. The worker presses the button to start feeding, and the adjustable feeding assembly opens, causing the material to fall in a waterfall-like manner. At the same time, the side spiral feeding assembly starts to convey the material. Because it is spiral feeding, the material is sprayed at the outlet and forms a surface-to-surface contact with the aggregate falling above to achieve the purpose of mixing. The mixed material passes through the airlock assembly into the packaging bag to achieve quantitative and rapid packaging. Step 3: Remove the packaging bag from the clamping assembly and tie it closed. The packaged bag is then conveyed to the required location via a belt conveyor.

[0014] This utility model has the following beneficial effects: This invention integrates a first metering chamber, a spiral feeding assembly, and an adjustable feeding assembly to achieve simultaneous metering and direct mixing of multiple materials. It eliminates the need for additional pre-mixing processes and auxiliary equipment. Compared to the complex process of "pre-mixing + secondary mixing" in the prior art, it not only reduces production steps and equipment investment costs but also avoids problems such as material loss and ratio deviation during the pre-mixing process.

[0015] 2. This utility model addresses the defects of material stratification and agglomeration caused by the single stirring or screw conveying of existing equipment. This mixer innovatively designs a composite mixing method of "waterfall-like descent + jet-like conveying": the adjustable feeding component, through the cooperation of the transition pipe and the arc-shaped hopper door, makes the aggregate in the first metering hopper fall evenly in a waterfall-like manner; at the same time, the screw conveying component, driven by a horizontal motor, conveys the material in the second metering hopper to the guide hopper in a jet-like manner. The two materials form a full "surface-to-surface" contact in the guide hopper, which greatly increases the diffusion and fusion area of ​​the materials. It is especially suitable for granular and powdery materials with large density differences or uneven particle size, such as chemical raw materials and feed ingredients, effectively solving the problems of stratification and agglomeration, significantly improving the uniformity of the mixed materials, and ensuring the stability of the final product quality. 3. This utility model of a mixing machine integrates the mixing and packaging processes into a single device through the seamless connection of the air-closing component and the bag-clamping component. The mixed material can be directly and accurately conveyed through the adjustable-speed air-closing component to the packaging bag clamped by the bag-clamping component, eliminating the need for temporary storage in a transfer warehouse and secondary conveying. This design not only avoids the problem of material stagnation in the transfer process but also reduces the contact between the material and the external environment, lowering the risk of secondary contamination. At the same time, the belt conveyor can directly transport the packaged bags to the target location, forming a continuous production process of "metering-mixing-packaging-conveyance", which greatly improves the packaging efficiency per unit time. 4. The adjustable feeding component of this utility model drives the rocker arm one and the transition tube to rotate through the square cylinder body, which can flexibly adjust the opening and closing degree of the arc-shaped hopper door, thereby controlling the aggregate falling speed and adapting to the feeding requirements of materials with different particle sizes; the air-closing component adjusts the speed of the drive shaft through a micro cycloidal pinwheel reducer, which can accurately control the material conveying rate and match the speed requirements of different packaging specifications; the bag clamping component drives the rocker arm two and the clamping half ring through the cylinder, which can adapt to packaging bags of different sizes, and the rubber sealing strip ensures the clamping seal and avoids material leakage. The overall structure is flexible and adjustable. Attached Figure Description

[0016] Figure 1 This is a front structural view of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a front view of the feeding assembly in this utility model; Figure 4 This is a side view of the feeding assembly in this utility model; Figure 5 This is a top view of the feeding assembly in this utility model; Figure 6 This is a front view of the spiral feeding assembly in this utility model; Figure 7 This is a side view of the spiral feeding assembly in this utility model; Figure 8 This is a front structural view of the Zhongguanfeng component of this utility model; Figure 9 This utility model Figure 8 Sectional view at point AA; Figure 10 This utility model Figure 9 Sectional view at point BB; Figure 11 This is a front structural view of the bag clamping assembly in this utility model; Figure 12 This is a side view of the bag clamping assembly in this utility model; Figure 13 This is a top view of the bag clamping assembly in this utility model.

[0017] Legend: 1. Frame body; 2. Belt conveyor; 3. Support frame; 4. First metering bin; 5. Chute; 6. Slide valve one; 7. Guide bin; 8. Discharge assembly; 9. Screw feeding assembly; 10. Screw conveyor; 11. Slide valve two; 12. Airlock assembly; 13. Bag clamping assembly; 81. Valve housing body; 82. Chute 1; 83. Chute 2; 84. Suction pipe; 85. Transition pipe; 86. Support component; 87. Square cylinder body; 88. Y-type connector 1; 89. Rocker arm 1; 810. Arc-shaped compartment door; 91. Horizontal motor; 92. Conveyor cylinder; 93. Sealing seat; 94. Conveyor shaft; 95. V-belt; 96. Spiral blades; 97. Second measuring hopper; 121. Housing; 122. Drive shaft; 123. Partition; 124. Coupling; 125. Miniature cycloidal pinwheel reducer; 131. Feeding cylinder; 132. Positioning block; 133. Rocker arm II; 134. Y-type connector II; 135. Cylinder; 136. Clamping half ring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] To address the clogging mechanism caused by differences in powder properties, proactive intervention is needed in the early stages of material accumulation. Traditional passive unblocking devices cannot adapt to the flow characteristics of different materials, necessitating the development of a graded treatment mechanism. Analysis of the powder's movement trajectory within the silo revealed that vertical accumulation and poor horizontal flowability are key factors causing clogging. Therefore, a rotating mechanical structure is proposed inside the silo to simultaneously achieve material crushing and directional conveying.

[0020] Therefore, refer to Figure 1 - Figure 13This application discloses a mixing machine, including a frame body 1. The frame body 1 serves as the overall support foundation for the equipment, providing a stable installation platform for each functional component and ensuring the structural stability of the equipment during operation. A belt conveyor 2 for conveying material bags is installed on the lower side of the frame body 1. The belt conveyor 2 is used to transport the packaged material bags directly to the target storage or transfer location, in conjunction with subsequent mixing... The integrated packaging process includes a support frame 3 fixed to the center of the top surface of the frame body 1. A first metering bin 4 for temporary aggregate storage is installed inside the support frame 3. A chute 5 is installed at the upper feed position of the first metering bin 4, and a gate valve 6 is also installed on the chute 5. The first metering bin 4 pre-stores and meters aggregates, providing a precise material basis for subsequent synchronous mixing. A guide bin 7 is located directly below the first metering bin 4. An adjustable feeding assembly 8 for controlling the aggregate flow rate is installed between the guide bin 7 and the first metering bin 4. At least one screw conveyor assembly 9 is installed on the side of the guide bin 7. A screw conveyor 10 is installed on the upper side of the screw conveyor assembly 9. The output end of the screw conveyor 10 is connected to the feed end of the screw conveyor assembly 9 via a steel pipe, and a gate valve 11 is also installed on the steel pipe. The guide bin 7 simultaneously receives aggregates from the first metering bin 4. The waterfall-shaped aggregate and the jet-shaped material from the spiral feeding assembly 9 provide space for the two materials to fully contact each other, effectively solving the problems of material stratification and agglomeration in existing equipment and improving the uniformity of mixing. An adjustable speed airlock assembly 12 is installed at the output end of the guide hopper 7. The airlock assembly 12 has an adjustable speed function, which can prevent outside air from entering the guide hopper 7 and affecting the state of the mixed materials. On the other hand, the conveying speed of the mixed materials to the packaging bags can be precisely controlled by adjusting the speed to match the speed requirements of different packaging specifications. A bag clamping assembly 13 is installed on the lower side of the airlock assembly 12 to clamp the bag mouth when packing the bag. The bag clamping assembly 13 is used to clamp the bag mouth when packing the bag to prevent material leakage. At the same time, it can be adapted to packaging bags of different sizes, improving the versatility of the equipment. Together with the airlock assembly 12, the mixed materials can be directly put into the bag.

[0021] The adjustable feeding assembly 8 includes a valve body 81. A first chute 82 and a second chute 83 are formed through the middle of the valve body 81. A dust suction pipe 84 is connected to one side of the valve body 81, and a dust suction device is connected to the external dust suction pipe 84 to remove dust generated during the aggregate falling process in real time. This improves the production environment and protects the health of operators, while also preventing dust from adhering to the inner wall of the assembly and affecting feeding accuracy. It also prevents dust from entering the guide hopper 7 and affecting the purity of the mixed materials. A transition pipe 85 is rotatably connected to the side. A support 86 is welded to the outer wall of one side of the valve body 81. A Y-type connector 88 is installed at the bottom of the support 86. A square cylinder body 87 is rotatably installed on the Y-type connector 88. A rocker arm 89 is rotatably connected between the output end of the square cylinder body 87 and the transition pipe 85. The outer wall of the middle part of the transition pipe 85 extends to the inner side of the first chute 82 and the second chute 83. An arc-shaped door 8 is fixed in the middle part of the transition pipe 85 for opening and closing the first chute 82 and the second chute 83. 10. The extension and retraction of the square cylinder body 87 drives the rocker arm 89 to rotate, thereby driving the transition pipe 85 and the arc-shaped hopper door 810 to adjust the opening and closing degree, realizing automatic control, and thus controlling the aggregate falling speed to adapt to the feeding requirements of materials with different particle sizes. For example, for aggregates with larger particles, the opening and closing degree can be adjusted to ensure smooth feeding; for powdery materials, the opening and closing degree can be adjusted to avoid excessive feeding and accumulation, fully demonstrating the flexibility of the equipment structure. The first chute 82 is set at the upper end of the second chute 83, and the first chute 82 is set in a square bucket shape, so as to receive the aggregate output from the first metering bin 4 and realize the initial flow guidance. The second chute 83 is set in a long rectangular shape, so as to further sort out the aggregate flow direction and ensure that the aggregate falls evenly. The first chute 82 and the second chute 83 are smoothly connected and have an arc transition section, which effectively avoids the accumulation and blockage of aggregates during the falling process, ensuring smooth feeding and providing a structural foundation for the subsequent waterfall-like falling. The first chute 82 is connected through to the output end of the first metering bin 4.

[0022] The spiral feeding assembly 9 includes a horizontal motor 91, a conveying cylinder 92, and a second metering hopper 97. The second metering hopper 97 stores and measures the material fed to the conveying cylinder 92, allowing for precise control of the material input. In conjunction with the first metering bin 4, it enables synchronous mixing of multiple materials according to a set ratio, avoiding ratio deviations in the pre-mixing stage and improving mixing accuracy. One end of the conveying cylinder 92 is connected to the upper side wall of the guide bin 7. A sealing seat 93 is located in the middle of the conveying cylinder 92. A conveying shaft 94 is rotatably mounted on one side of the inner wall of the conveying cylinder 92, away from the sealing seat 93. The end of the conveying shaft 94 extends out of the conveying cylinder 92 and is connected to the output end of the horizontal motor 91 by a V-belt 95. 5. A spiral blade 96 is fixed to one end of the conveyor shaft 94 away from the V-belt 95. The lower end of the second metering hopper 97 is connected through the conveyor cylinder 92 and is located near the sealing seat 93. The horizontal motor 91, the conveyor cylinder 92, the second metering hopper 97 and the guide bin 7 are all fixed on the frame body 1. After the horizontal motor 91 is started, it drives the conveyor shaft 94 to rotate through the V-belt 95. When the conveyor shaft 94 rotates, the spiral blade 96 rotates synchronously, which can push the material in the conveyor cylinder 92 towards the guide bin 7. Due to the spiral structure of the spiral blade 96, the material is sprayed at the outlet, which can form a "surface-to-surface" full contact with the waterfall-like aggregate falling from the first metering bin 4, greatly increasing the material diffusion and fusion area, effectively solving the material stratification and agglomeration problems of existing equipment, and significantly improving the mixing uniformity.

[0023] The airlock assembly 12 includes a through-hole housing 121. A drive shaft 122 is rotatably connected to the center of the inner walls on both sides of the housing 121. A partition 123 is fixed to the outer wall of the drive shaft 122. A miniature cycloidal pinwheel reducer 125 is provided on one side of the housing 121. The miniature cycloidal pinwheel reducer 125 is rotatably connected to the drive shaft 122 via a coupling 124. The miniature cycloidal pinwheel reducer 125 has an adjustable output speed, which, through the coupling 124, controls the rotational speed of the drive shaft 122 and the partition 123, achieving precise adjustment of the mixing material conveying speed and adapting to different packaging specifications. Speed ​​requirements, for example, can be addressed by increasing the rotation speed to speed up the conveying of large-sized packaging bags, while reducing the rotation speed to precisely control the quantity for small-sized packaging bags, ensuring rapid quantitative packaging and improving packaging efficiency. The shell 121 is fitted and fixed to the bottom side of the guide hopper 7, and there are six partitions 123 evenly distributed in pairs on the outer wall of the drive shaft 122. When each pair of partitions 123 rotates to the horizontal position, they fit against the inner wall of the shell 121 to achieve a seal. This not only prevents outside air from entering, but also allows the mixed materials to be conveyed downwards through the rotation of the partitions 123, achieving the dual function of "sealed conveying".

[0024] The bag clamping assembly 13 includes a feeding cylinder 131. Positioning blocks 132 are fixed at each of the four corners of the feeding cylinder 131. A rocker arm 133 is rotatably connected to each positioning block 132. A Y-type connector 134 is rotatably mounted on the top of the rear rocker arm 133 near the feeding cylinder 131. A cylinder 135 is installed between each Y-type connector 134 and the front rocker arm 133. Clamping half-rings 136 are fixed to the lower ends of both the front and rear rocker arms 133. Rubber seals are fixed to the adjacent ends of the two clamping half-rings 136. The sealing strip, specifically the rubber sealing strip, enhances the clamping seal, preventing material leakage from the bag opening and ensuring packaging quality. Simultaneously, the rubber material prevents damage to the packaging bag during clamping, improving equipment safety. The cylinder 135 is rotatably connected to the Y-type connector 134 and the rocker arm 133 via a hinged seat. The extension and retraction of the cylinder 135 drives the Y-type connector 134 and the rocker arm 133 to rotate, thereby causing the clamping half-ring 136 to clamp or release. This highly automated process reduces manual operation and improves packaging efficiency.

[0025] A mixing method for a mixer, comprising: Step 1: Aggregate is fed into the first metering bin 4 through the chute 5, while a second or more materials to be mixed are fed into the screw feeding assembly 9 through the screw conveyor 10. The first metering bin 4 and the second metering hopper 97 of the screw feeding assembly 9 weigh their respective materials. When the material reaches the set weight, the feeding is stopped, and the first gate valve 6 and the second gate valve 11 are closed to ensure that each material is stored accurately according to the set ratio, avoiding material loss and ratio deviation in the premixing stage, and laying the foundation for subsequent accurate mixing. Step 2: The worker places the packaging bag onto the feeding cylinder 131 of the bag clamping assembly 13, starts the bag clamping assembly 13, and the cylinder 135 extends and retracts, driving the rocker arm 133 and the clamping half-ring 136 to rotate. The clamping half-ring 136, in conjunction with the rubber sealing strip, clamps the opening of the packaging bag to prevent material leakage. The worker presses the button to start feeding, and the square cylinder body 87 of the adjustable feeding assembly 8 starts, driving the rocker arm 89 and the transition pipe 85 to rotate. The arc-shaped hopper door 810 opens, and the aggregate in the first metering hopper 4 flows down in a waterfall shape to the guide hopper 7 after being guided by the chute 1 82 and the chute 2 83. At the same time, the side spiral feeding assembly 9 starts synchronously, and the horizontal motor 91 drives the conveyor shaft 94 and the spiral blade 96 to rotate through the V-belt 95, conveying the material in the second metering hopper 97 in a spray shape to the guide hopper 7. The two materials form a "surface-to-surface" interaction in the guide hopper 7. Contact significantly increases the diffusion and fusion area, effectively solving the problems of stratification and agglomeration, and achieving efficient mixing. The mixed material enters the airlock assembly 12, and the micro cycloidal pinwheel reducer 125 adjusts the speed of the drive shaft 122 and the partition 123, conveying the material into the packaging bag at a set rate to achieve quantitative and rapid packaging. This step seamlessly connects mixing and packaging, eliminating the need for a transfer warehouse and reducing the risk of secondary contamination. Step 3: After packaging is completed, the bag clamping assembly 13 is released, and the worker removes the packaging bag from the bag clamping assembly 13 and ties it. The packaged packaging bag is placed directly on the belt conveyor 2 and automatically transported to the required location, such as the storage area or transfer area, forming a continuous production process of "metering-mixing-packaging-transportation". This greatly improves the production efficiency per unit time and is suitable for large-scale continuous production scenarios in the fields of chemical raw materials, food additives, and feed ingredients.

[0026] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mixing machine, comprising a frame body (1), wherein a belt conveyor (2) for conveying material bags is mounted on the lower side of the frame body (1), characterized in that: The frame body (1) has a support (3) fixed in the middle of the top surface. The support (3) has a first metering bin (4) for temporary storage of aggregate installed inside. The first metering bin (4) has a chute (5) installed at the upper feed position. A slide valve (6) is also installed on the chute (5). A guide bin (7) is provided directly below the first metering bin (4). An adjustable feeding assembly (8) for controlling the aggregate flow rate is installed between the guide bin (7) and the first metering bin (4). At least one screw feeding assembly (9) is provided on the side of the guide bin (7). A screw conveyor (10) is provided on the upper side of the screw feeding assembly (9). The output end of the screw conveyor (10) is connected to the feed end of the screw feeding assembly (9) through a steel pipe. A second slide valve (11) is also installed on the steel pipe. The output end of the feed hopper (7) is equipped with an adjustable speed air-closing component (12), and a bag clamping component (13) for clamping the bag opening when packing the bag is installed on the lower side of the air-closing component (12).

2. A mixing machine according to claim 1, characterized in that: The adjustable feeding assembly (8) includes a valve body (81), a chute 1 (82) and a chute 2 (83) are provided through the middle of the valve body (81), a dust suction pipe (84) is connected through one side of the valve body (81), a transition pipe (85) is rotatably connected to the inner side of the valve body (81), a support (86) is welded to the outer wall of one side of the valve body (81), a Y-type connector 1 (88) is installed at the bottom of the support (86), a square cylinder body (87) is rotatably installed on the Y-type connector 1 (88), a rocker arm 1 (89) is rotatably connected between the output end of the square cylinder body (87) and the transition pipe (85), the outer wall of the middle of the transition pipe (85) extends to the inner side of the chute 1 (82) and the chute 2 (83), and an arc-shaped door (810) for opening and closing the chute 1 (82) and the chute 2 (83) is fixed in the middle of the transition pipe (85).

3. A mixing machine according to claim 2, characterized in that: The first chute (82) is located at the upper end of the second chute (83), and the first chute (82) is arranged in a square bucket shape, while the second chute (83) is arranged in a long rectangular shape. The first chute (82) and the second chute (83) are smoothly connected and have an arc transition section. The first chute (82) is connected through to the output end of the first metering chamber (4).

4. A mixing machine according to claim 2, characterized in that: The spiral feeding assembly (9) includes a horizontal motor (91), a conveying cylinder (92), and a second metering hopper (97). One end of the conveying cylinder (92) is connected to the upper side wall of the guide hopper (7). A sealing seat (93) is provided in the middle of the conveying cylinder (92). A conveying shaft (94) is rotatably installed on the inner wall of one side of the sealing seat (93). The end of the conveying shaft (94) away from the sealing seat (93) extends to the outside of the conveying cylinder (92) and is connected to the output end of the horizontal motor (91) by a V-belt (95). A spiral blade (96) is fixed at the end of the conveying shaft (94) away from the V-belt (95). The lower end of the second metering hopper (97) is connected to the conveying cylinder (92) and is located near the sealing seat (93).

5. A mixing machine according to claim 4, characterized in that, The horizontal motor (91), conveyor cylinder (92), second metering hopper (97) and guide bin (7) are all fixed on the frame body (1).

6. A mixing machine according to claim 4, characterized in that: The air-closing assembly (12) includes a shell (121) that runs vertically through the shell. A drive shaft (122) is rotatably connected to the center of the inner walls on both sides of the shell (121). A partition (123) is fixed to the outer wall of the drive shaft (122). A miniature cycloidal pinwheel reducer (125) is provided on one side of the shell (121). The miniature cycloidal pinwheel reducer (125) and the drive shaft (122) are rotatably connected by a coupling (124).

7. A mixing machine according to claim 6, characterized in that: The housing (121) is sleeved and fixed to the bottom side of the guide hopper (7), and the partition (123) is provided in six pairs and evenly distributed on the outer wall of the drive shaft (122). When each pair of partitions (123) rotates to the horizontal position, they fit against the inner wall of the housing (121) to achieve closure.

8. A mixing machine according to claim 6, characterized in that: The bag clamping assembly (13) includes a feeding cylinder (131). A positioning block (132) is fixed at each of the four corners in the middle of the feeding cylinder (131). A rocker arm (133) is rotatably connected to each positioning block (132). A Y-type connector (134) is rotatably installed on the top of the rocker arm (133) near the feeding cylinder (131). A cylinder (135) is installed between each Y-type connector (134) and the rocker arm (133) at the front. A clamping half ring (136) is fixed at the lower end of the two rocker arms (133) at the front and rear ends. A rubber sealing strip is fixed at one end of each clamping half ring (136) close to each other.

9. A mixing machine according to claim 8, characterized in that: The cylinder (135) is rotatably connected to the second Y-type connector (134) and the second rocker arm (133) via a hinge seat.

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