An environmentally friendly adhesive raw material precise proportioning device

Abstract

This utility model relates to the technical field of environmentally friendly adhesive production equipment, specifically disclosing a device for precise proportioning of environmentally friendly adhesive raw materials. The device includes a lower lifting frame, a weighing sensor, and a weighing assembly. The weighing assembly includes a weighing frame, a storage cylinder, an upper lifting drive device, an upper lifting frame, a push rod, an upper piston, and a lower piston. By moving the storage cylinder to the feed inlet of the reactor, the weight of the raw materials in the storage cylinder is monitored in real time by the weighing sensor. After the raw materials are weighed, the upper lifting drive device drives the push rod to descend, causing the upper piston to descend below the storage cylinder, allowing the raw materials to be directly discharged into the feed inlet of the reactor. The operation is simple, and the upper piston can scrape off material adhering to the inner wall of the storage cylinder, preventing material residue from reducing the actual proportioned raw materials entering the reactor, thereby reducing proportioning errors and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of environmentally friendly adhesive production equipment, and in particular to an environmentally friendly adhesive raw material precise proportioning device. Background Technology

[0002] Environmentally friendly adhesives refer to adhesives that have minimal impact on the environment during production and use, and are harmless to humans and the environment. Types include polyurethane adhesives, water-based adhesives, hot melt adhesives, epoxy adhesives, and silicone adhesives. In the production process of environmentally friendly adhesives, various raw materials need to be added to a reaction vessel in precise proportions and mixed. Currently, the traditional method for raw material proportioning involves manually placing a weighing cylinder on a weighing platform, adding one raw material to the cylinder, weighing it, and then transferring it to a reaction vessel before moving on to the next raw material. This traditional method has several problems: First, it is cumbersome, requiring multiple manual operations such as placing the weighing cylinder, adding raw materials, and transferring them, consuming a significant amount of time and manpower. Second, it is labor-intensive, as prolonged repetitive operations can easily lead to operator fatigue. Third, residues of the previous raw material can easily remain in the weighing cylinder, causing the actual weight of the next raw material to be less than its weighed weight, thus affecting the accuracy of the proportioning and ultimately impacting the quality of the environmentally friendly adhesive. Therefore, there is an urgent need for a device that can achieve precise proportioning of environmentally friendly adhesive raw materials while being easy to operate and reducing labor intensity. Utility Model Content

[0003] The purpose of this utility model is to provide an environmentally friendly adhesive raw material precise proportioning device to solve the problems of cumbersome operation, high labor intensity and low proportioning accuracy of environmentally friendly adhesive raw material proportioning in the prior art.

[0004] To achieve the above objectives, this utility model provides an environmentally friendly adhesive raw material precise proportioning device, comprising: Lower lifting frame; The load cell is fixedly installed on the lower lifting frame; The weighing component includes a weighing frame, a storage cylinder, an upper lifting drive device, an upper lifting frame, a push rod, an upper piston, and a lower piston. The weighing frame is fixedly mounted on the weighing sensor. The storage cylinder and the upper lifting drive device are mounted on the weighing frame. Both the upper and lower ends of the storage cylinder are open. The upper lifting frame is connected to the output end of the upper lifting drive device and is driven to lift by the upper lifting drive device. The push rod is mounted on the upper lifting frame. The upper piston and the lower piston are both mounted on the push rod. The upper piston is located above the lower piston. When the upper piston and the lower piston move inside the storage cylinder, they are both slidably and sealed to the storage cylinder. When the upper lifting frame is at the upper stop point, the lower piston is slidably and sealed to the storage cylinder, and a storage cavity is formed inside the storage cylinder that can store the glue raw material. When the upper lifting frame is at the lower stop point, the upper pistons are all located below the storage cylinder.

[0005] Furthermore, the device also includes a frame and a lower lifting drive device. The lower lifting drive device is mounted on the frame, and the lower lifting frame is connected to the output end of the lower lifting drive device and is driven to lift by the lower lifting drive device. The lower lifting drive device can drive the lower lifting frame to lift, thereby realizing positional adjustments such as moving the storage cylinder to the feed port of the reactor. Furthermore, a lower guide rod is fixed to the frame, and a lower guide sleeve is fixed to the lower lifting frame, with the lower guide sleeve slidably connected to the lower guide rod. At least two lower guide rods are provided, and the upper ends of each lower guide rod are fixedly connected via a connecting plate. This structural design ensures the stability of the lower lifting frame during lifting, prevents swaying, and improves the reliability of the device operation.

[0006] Furthermore, the weighing assembly also includes an upper guide rod and an upper guide sleeve. The upper guide rod is fixed on the upper lifting frame, and the upper guide sleeve is fixed on the weighing frame. The upper guide sleeve is slidably connected to the upper guide rod. This structure allows the upper lifting frame to move smoothly along a predetermined direction during lifting, ensuring the sealing effect and movement accuracy of the upper and lower pistons within the storage cylinder.

[0007] Furthermore, the weighing component also includes a drive motor, a transmission assembly, and bearings. The bearings are mounted on the upper lifting frame, and the push rod is rotatably connected to the upper lifting frame. The drive motor is connected to the push rod via the transmission assembly. Specifically, the transmission assembly includes a driving pulley, a driven pulley, and a synchronous belt. The driving pulley is mounted on the output end of the drive motor, and the driven pulley is mounted on the push rod. The driving pulley and the driven pulley are connected by a synchronous belt. The drive motor drives the push rod to rotate via the transmission assembly, which in turn drives the upper and lower pistons to rotate, allowing the material adhering to the upper and lower pistons to be ejected. Furthermore, the device also includes a feeding mechanism, comprising a pump body, a feed pipe, and a discharge pipe. The pump body input end is connected to the feed pipe, and the pump body output end is connected to the discharge pipe. A feed port is provided on the upper piston, and the feed port can rotate to a position directly below the discharge pipe output end. The discharge pipe output end is vertically downward and can enter the feed port. The feeding mechanism can transport raw materials into the storage cylinder. Furthermore, a liquid flow sensor and a solenoid valve are installed on the discharge pipe. The liquid flow sensor can monitor the flow rate of the raw material in the discharge pipe in real time, and the solenoid valve can accurately control the delivery of the raw material according to control commands, further improving the accuracy of the raw material ratio. Furthermore, the discharge pipe is a rigid pipe, which is fixedly connected to the lower lifting frame to ensure the stability of the discharge pipe during the operation of the device and to avoid the impact of factors such as shaking on the conveying and proportioning of raw materials.

[0008] The beneficial effects of this technical solution are as follows: By moving the storage cylinder to the feed port of the reactor, the weight of the raw materials in the storage cylinder is monitored in real time by a weighing sensor. After the raw materials are weighed, the push rod is driven down by the upper lifting drive device, so that the upper piston is lowered below the storage cylinder, and the raw materials can be directly discharged to the feed port of the reactor. The operation is simple, and the upper piston can scrape off the material attached to the inner wall of the storage cylinder, avoiding material residue that would reduce the actual proportion of raw materials entering the reactor, thereby reducing the proportioning error and improving production efficiency. Attached Figure Description

[0009] Figure 1 A schematic diagram of the structure of an environmentally friendly adhesive raw material precise proportioning device according to an embodiment. Figure 1 (The upper lifting frame is at its upper stop point). Figure 2 A schematic diagram of the structure of an environmentally friendly adhesive raw material precise proportioning device according to an embodiment. Figure 2 (The storage cylinder has moved into the feed inlet of the reactor). Figure 3 A schematic diagram of the structure of an environmentally friendly adhesive raw material precise proportioning device according to an embodiment. Figure 3 (The upper lifting frame is at its lower stop point). In the diagram, 1. Lower lifting frame; 2. Weighing sensor; 3. Weighed component; 301. Weighing frame; 302. Storage cylinder; 303. Upper lifting drive device; 304. Upper lifting frame; 305. Push rod; 306. Upper piston; 307. Lower piston; 308. Storage chamber; 309. Upper guide rod; 310. Upper guide sleeve; 311. Drive motor; 312. Bearing; 313. Driving pulley; 314. Driven pulley; 315. Feed inlet; 316. Synchronous belt; 4. Frame; 5. Lower lifting drive device; 6. Lower guide rod; 7. Lower guide sleeve; 8. Connecting plate; 9. Feeding mechanism; 91. Pump body; 92. Feed pipe; 93. Discharge pipe; 94. Liquid flow sensor; 95. Solenoid valve; 10. Reactor loading port. Detailed Implementation

[0010] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0011] Please see Figures 1 to 3 This application provides an environmentally friendly adhesive raw material precise proportioning device, including: a lower lifting frame 1, a weighing sensor 2, and a weighing component 3; Among them, the weighing sensor 2 is fixedly installed on the lower lifting frame 1; The weighing component 3 includes a weighing frame 301, a storage cylinder 302, an upper lifting drive device 303, an upper lifting frame 304, a push rod 305, an upper piston 306, and a lower piston 307. The weighing frame 301 is fixedly mounted on the weighing sensor 2. The storage cylinder 302 and the upper lifting drive device 303 are mounted on the weighing frame 301. Both the upper and lower ends of the storage cylinder 302 are open. The upper lifting frame 304 is connected to the output end of the upper lifting drive device 303 and is driven to lift by the upper lifting drive device 303. The push rod 305 is mounted on the upper lifting frame 304. The upper piston 306 and the lower piston 307 are both mounted on the push rod 305. The upper piston 306 is located above the lower piston 307. When the upper piston 306 and the lower piston 307 move inside the storage cylinder 302, they are both slidably and sealingly connected to the storage cylinder 302. When the upper lifting frame 304 is at the upper stop point, the lower piston 307 is slidably sealed to the storage cylinder 302, and a storage cavity 308 capable of storing glue raw materials is formed inside the storage cylinder 302. When the upper lifting frame 304 is at the lower dead center, the upper piston 306 is located below the storage cylinder 302.

[0012] In this embodiment, the upper lifting drive device 303 is selected as a pneumatic cylinder, or a hydraulic cylinder or an electric cylinder.

[0013] In this embodiment, a ring-shaped hollow weighing sensor 2 is selected, and the storage cylinder 302 is located in the hollow inner part of the weighing sensor 2. The weighing sensor 2 monitors the weight of the component 3 being weighed above it in real time. When the raw material enters the storage cylinder 302, the weight changes, and the weighing sensor 2 converts the weight signal into an electrical signal and transmits it to the control system, thereby realizing real-time monitoring of the raw material weight. After tareing the overall weight of the component 3 being weighed, the weight of the raw material inside the storage cylinder 302 can be obtained.

[0014] When preparing the mixture, please refer to [the instructions]. Figure 1 The lower end of the storage cylinder 302 is moved into the feed port 10 of the reactor. When the upper lifting frame 304 is at its upper stop point, the lower piston 307 and the storage cylinder 302 slide tightly and seal, forming a closed storage chamber 308. At this time, environmentally friendly adhesive raw materials can be added into the storage chamber 308. The weighing sensor 2 monitors the weight in real time, and stops feeding when the predetermined value is reached.

[0015] When it is necessary to discharge raw materials, please refer to Figure 2 Move the lower lifting frame 1 and the storage cylinder 302 downwards, so that the storage cylinder 302 moves into the feed port of the reactor; then, please refer to Figure 3 The upper lifting drive device 303 drives the upper lifting frame 304 to descend to the lower stop point. At this time, the upper piston 306 and the lower piston 307 are both below the storage cylinder 302. The raw material in the storage cylinder 302 is discharged into the feed port 10 of the reactor by gravity.

[0016] In some embodiments, please refer to Figures 1 to 3 It is also equipped with a frame 4 and a lower lifting drive device 5. The lower lifting drive device 5 is installed on the frame 4. The lower lifting frame 1 is connected to the output end of the lower lifting drive device 5 and is driven to lift by the lower lifting drive device 5.

[0017] In this embodiment, the lower-level lifting drive device 5 is selected from pneumatic cylinders, hydraulic cylinders, or electric cylinders.

[0018] When loading materials, please refer to the following: Figure 1 The frame 4 is positioned so that the storage cylinder 302 is directly above the feed inlet 10 of the reactor; the lower lifting frame 1 is lowered by the lower lifting drive device 5. Please refer to [link / reference]. Figure 2 The storage cylinder 302 can be moved to the feed port 10 of the reactor.

[0019] After feeding is complete, when it is necessary to close the feed port 10 of the reactor, please refer to [the relevant instructions]. Figure 1 The lower lifting frame 1 is raised by the lower lifting drive device 5, which can move the storage cylinder 302 to directly above the feed port 10 of the reactor.

[0020] The lower-level lifting drive device 5 enables the vertical adjustment of the storage cylinder 302, allowing it to be easily moved into and out of the reactor feed port 10. This facilitates the transfer of raw materials, reduces the amount of manual handling, improves work efficiency, and ensures the stability of the device operation.

[0021] In some embodiments, please refer to Figures 1 to 3A lower guide rod 6 is fixed on the frame 4, and a lower guide sleeve 7 is fixed on the lower lifting frame 1. The lower guide sleeve 7 is slidably connected to the lower guide rod 6. At least two lower guide rods 6 are provided, and the upper ends of each lower guide rod 6 are fixedly connected by a connecting plate 8.

[0022] Specifically, when the lower-level lifting frame 1 rises and falls under the action of the lower-level lifting drive device 5, the lower-level guide sleeve 7 slides along the lower-level guide rod 6, ensuring the stability and accuracy of the lower-level lifting frame 1 during the lifting process and improving the reliability of the device operation. The design of the connecting plate 8 makes each lower-level guide rod 6 more stable, providing stable guidance and support for the lower-level lifting frame 1 and limiting the swaying and deviation of the lower-level lifting frame 1 during the lifting process.

[0023] In some embodiments, please refer to Figures 1 to 3 The weighing assembly 3 also includes an upper guide rod 309 and an upper guide sleeve 310. The upper guide rod 309 is fixed on the upper lifting frame 304, and the upper guide sleeve 310 is fixed on the weighing frame 301. The upper guide sleeve 310 is slidably connected to the upper guide rod 309.

[0024] Specifically, when the upper lifting frame 304 is in the lifting motion, the upper guide rod 309 slides in the upper guide sleeve 310 installed on the weighing frame 301, providing guidance for the movement of the upper lifting frame 304, ensuring that the upper lifting frame 304 moves smoothly in the predetermined direction, thereby ensuring that the upper piston 306 and the lower piston 307 can move accurately in the storage cylinder 302.

[0025] In some embodiments, please refer to Figures 1 to 3 The weighing assembly 3 also includes a drive motor 311, a transmission assembly, and a bearing 312. The bearing 312 is mounted on the upper lifting frame 304, and the push rod 305 is rotatably connected to the upper lifting frame 304. The drive motor 311 is connected to the push rod 305 via the transmission assembly. The transmission assembly is a synchronous transmission assembly.

[0026] The transmission assembly includes a driving pulley 313, a driven pulley 314, and a synchronous belt 316. Both the driving pulley 313 and the driven pulley 314 are synchronous pulleys. The driving pulley 313 is mounted on the output end of the drive motor 311, and the driven pulley 314 is mounted on the push rod 305. The driving pulley 313 and the driven pulley 314 are connected by the synchronous belt 316. In other embodiments, the transmission assembly can also be a gear assembly, including a driving gear and a driven gear. The driving gear and the driven gear are respectively mounted on the output end of the drive motor 311 and the push rod 305, which can also achieve synchronous transmission.

[0027] Specifically, the drive motor 311 drives the active pulley 313 to rotate, and the active pulley 313 drives the driven pulley 314 and push rod 305 to rotate via the synchronous belt 316, which in turn drives the upper piston 306 and the lower piston 307 to rotate.

[0028] Please see Figure 3 It should be noted that after the storage cylinder 302 moves into the feed port 10 of the reactor, and the upper lifting frame 304 is at its lower stop, both the upper piston 306 and the lower piston 307 are located below the storage cylinder 302 and inside the reactor. The raw material in the storage cylinder 302 enters the feed port 10 of the reactor under the action of gravity. During this process, the descent of the upper piston 306 scrapes off the material attached to the inner wall of the storage cylinder 302, allowing it to enter the reactor as well. Afterward, the drive motor 311 is started, and the drive motor 311 drives the push rod 305 to rotate through the transmission assembly, which in turn drives the upper piston 306 and the lower piston 307 to rotate. Centrifugal force is used to throw the raw material attached to the upper piston 306 and the lower piston 307 into the reactor, further reducing the proportioning error.

[0029] In some embodiments, please refer to Figures 1 to 3 The device also includes a feeding mechanism 9, comprising a pump body 91, an inlet pipe 92, and an outlet pipe 93. The input end of the pump body 91 is connected to the inlet pipe 92, and the output end of the pump body 91 is connected to the outlet pipe 93. An inlet 315 is provided on the upper piston 306, and the inlet 315 can rotate to a position directly below the output end of the outlet pipe 93. The output end of the outlet pipe 93 is vertically downward and can enter the inlet 315. The feeding mechanism 9 can transport the raw material to the storage cylinder 302.

[0030] The drive motor 311 is a stepper motor or a servo motor, which facilitates control of the rotation angle, thereby rotating the feed inlet 315 to a position directly below the output end of the discharge pipe 93. By driving the lower piston 307 to rise, the discharge pipe 93 enters the feed inlet 315.

[0031] Pump body 91 can be a peristaltic pump, which can precisely control the output flow rate, or a gear pump or other types of pumps can be selected. After pump body 91 is started, it draws raw materials into the feed pipe 92 and delivers them to the storage cylinder 302 through the discharge pipe 93.

[0032] To further improve the proportioning accuracy and prevent the raw material entering the storage cylinder 302 from exceeding the preset value, a liquid flow sensor 94 and a solenoid valve 95 are installed on the discharge pipe 93. The liquid flow sensor 94 can monitor the flow rate of the raw material in the discharge pipe 93 in real time. When the predetermined raw material weight is reached, the solenoid valve 95 closes, stopping the raw material delivery and preventing too much raw material from entering the storage cylinder 302, thereby further improving the accuracy of the raw material proportioning. Furthermore, to ensure that the position and orientation of the discharge pipe 93 remain fixed, the discharge pipe 93 is made of rigid material, such as steel pipe, which can maintain a stable shape and position during raw material transportation. The discharge pipe 93 is fixedly connected to the lower lifting frame 1, so that it can move synchronously with the lifting of the lower lifting frame 1, ensuring accurate docking with the feed port 315 of the upper piston 306 at different positions. This ensures the stability of the discharge pipe 93 during the operation of the device, avoids the impact of pipe shaking, deformation, and other factors on the conveying and proportioning accuracy of raw materials, improves the reliability and stability of the device operation, and also facilitates the overall layout and installation of the device.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. An accurate proportioning device for raw materials of environment-friendly glue, characterized in that, include: Lower lifting frame (1); The weighing sensor (2) is fixedly installed on the lower lifting frame (1); The weighing component (3) includes a weighing frame (301), a storage cylinder (302), an upper lifting drive device (303), an upper lifting frame (304), a push rod (305), an upper piston (306), and a lower piston (307). The weighing frame (301) is fixedly mounted on the weighing sensor (2). The storage cylinder (302) and the upper lifting drive device (303) are mounted on the weighing frame (301). The storage cylinder (302) has an open structure at both the upper and lower ends. The upper lifting frame (304) is driven to lift by the upper lifting drive device (303). The push rod (305) is mounted on the upper lifting frame (304). The upper piston (306) and the lower piston (307) are both mounted on the push rod (305). The upper piston (306) is located above the lower piston (307). When the upper piston (306) and the lower piston (307) move inside the storage cylinder (302), they are both slidably sealed to the storage cylinder (302); When the upper lifting frame (304) is at the upper stop point, the lower piston (307) is slidably sealed to the storage cylinder (302), and a storage cavity (308) capable of storing glue raw materials is formed inside the storage cylinder (302). When the upper lifting frame (304) is at the lower stop point, the upper piston (306) is located below the storage cylinder (302).

2. The precise proportioning device for environment-friendly glue raw materials according to claim 1, characterized in that, It also includes a frame (4) and a lower lifting drive device (5). The lower lifting drive device (5) is installed on the frame (4), and the lower lifting frame (1) is driven to lift by the lower lifting drive device (5).

3. The precise proportioning device for environment-friendly glue raw materials according to claim 2, characterized in that, The lower guide rod (6) is fixed on the frame (4), and the lower guide sleeve (7) is fixed on the lower lifting frame (1). The lower guide sleeve (7) is slidably connected to the lower guide rod (6).

4. The precise proportioning device for environment-friendly adhesive raw materials according to claim 3, characterized in that, At least two lower guide rods (6) are provided, and the upper ends of each lower guide rod (6) are fixedly connected by a connecting plate (8).

5. The precise proportioning device for environment-friendly glue raw materials according to claim 1, characterized in that, The weighing component (3) also includes an upper guide rod (309) and an upper guide sleeve (310). The upper guide rod (309) is fixed on the upper lifting frame (304), and the upper guide sleeve (310) is fixed on the weighing frame (301). The upper guide sleeve (310) is slidably connected to the upper guide rod (309).

6. The precise proportioning device for environment-friendly adhesive raw materials according to any one of claims 1 to 5, characterized in that, The weighing component (3) also includes a drive motor (311), a transmission component and a bearing (312). The bearing (312) is mounted on the upper lifting frame (304). The push rod (305) is rotatably connected to the upper lifting frame (304). The drive motor (311) is connected to the push rod (305) through the transmission component.

7. The environmentally friendly adhesive raw material precise proportioning device according to claim 6, characterized in that, The transmission assembly includes a drive pulley (313), a driven pulley (314), and a synchronous belt (316). The drive pulley (313) is installed at the output end of the drive motor (311), and the driven pulley (314) is installed on the push rod (305). The drive pulley (313) and the driven pulley (314) are connected by a synchronous belt (316).

8. The precise proportioning device for environment-friendly adhesive raw materials according to claim 6, characterized in that, It also includes a feeding mechanism (9), which includes a pump body (91), a feed pipe (92), and a discharge pipe (93). The input end of the pump body (91) is connected to the feed pipe (92), and the output end of the pump body (91) is connected to the discharge pipe (93). The upper piston (306) has a feed port (315). The feed port (315) can be rotated to a position directly below the output end of the discharge pipe (93). The output end of the discharge pipe (93) is set vertically downward and can enter the feed port (315).

9. The precise proportioning device for environment-friendly adhesive raw materials according to claim 8, characterized in that, A liquid flow sensor (94) and a solenoid valve (95) are installed on the discharge pipe (93).

10. The precise proportioning device for environment-friendly adhesive raw materials according to claim 8, characterized in that, The discharge pipe (93) is a rigid pipe, and the discharge pipe (93) is fixedly connected to the lower lifting frame (1).

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