Dual-drive variable-ratio metering system and metering method thereof

Abstract

The invention discloses a dual-drive variable-ratio metering system and a metering method thereof.The dual-drive variable-ratio metering system comprises a mounting frame, a metering piston cylinder A and a metering piston cylinder B are arranged on the mounting frame, a cavity A is formed in the metering piston cylinder A, a cavity B is formed in the metering piston cylinder B, and the dual-drive variable-ratio metering system further comprises a piston A arranged in the cavity A and a piston B arranged in the cavity B; the driving assembly A is used for driving the piston A to move; the driving assembly B is used for driving the piston B to move; the device further comprises a material mixing assembly, and the discharging end of the cavity A and the discharging end of the cavity B are connected with the material mixing assembly. According to the mechanism, independent and accurate driving of the metering piston cylinder A and the metering piston cylinder B is achieved through the arrangement of the driving assembly A and the driving assembly B. By means of the independent driving mode, when the material proportion changes, large-scale transformation design does not need to be conducted on the whole metering system, and only the operation parameters of the A driving assembly and the B driving assembly need to be correspondingly adjusted.

Description

Technical Field

[0001] This invention relates to the field of glue dispensing metering, and particularly to a dual-drive variable ratio metering system and its metering method. Background Technology

[0002] In existing industrial production, glue metering devices are frequently used. They are usually encapsulated and covered inside and on the surface of workpieces to protect sensitive components or electronic parts from factors such as dust, moisture, corrosive media or temperature, and to perform insulation, heat dissipation, sealing and other physical functions. Some traditional metering systems use servo motors to drive metering rods through ball screws to achieve metering functions, which are affected by material temperature, viscosity, density and thixotropy.

[0003] Due to the influence of external environmental factors, changes in the viscosity and density of materials can affect the accuracy of metering, making it impossible to achieve volumetric metering and the first-in-first-out (FIFO) material principle. When the material ratio changes, the corresponding metering system needs to be redesigned to meet the metering requirements, which is time-consuming, labor-intensive, and very costly. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a dual-drive variable ratio metering system that can quickly adapt to changes in material ratio and achieve high-precision metering.

[0005] The technical solution adopted by this invention to solve its technical problem is: a dual-drive variable ratio metering system, including a mounting frame, on which an A metering piston cylinder and a B metering piston cylinder are arranged. The A metering piston cylinder is provided with an A cavity, and the B metering piston cylinder is provided with a B cavity. It also includes an A piston disposed in the A cavity and a B piston disposed in the B cavity; it further includes an A drive assembly for driving the movement of the A piston and a B drive assembly for driving the movement of the B piston; and it also includes a mixing assembly, with the discharge ends of the A cavity and the B cavity respectively connected to the mixing assembly.

[0006] Furthermore, the bottom of cavity A is provided with an A feed channel and an A discharge channel, with an A feed valve installed in the A feed channel and an A discharge valve installed in the A discharge channel. The bottom of cavity B is provided with a B feed channel and a B discharge channel, with a B feed valve installed in the B feed channel and a B discharge valve installed in the B discharge channel. The A discharge channel and the B discharge channel are respectively connected to the mixing assembly.

[0007] Furthermore, the A drive assembly includes an A drive block and an A lead screw assembly that drives the A drive block to move up and down. The A drive block is located at the upper end of the A piston, and an A detection sensor that cooperates with the A piston is provided at the bottom of the A drive block.

[0008] Furthermore, the B drive assembly includes a B drive block and a B lead screw assembly that drives the B drive block to move up and down. The B drive block is located at the upper end of the B piston, and a B detection sensor that cooperates with the B piston is provided at the bottom of the B drive block.

[0009] Furthermore: Material A enters the A cavity through the A feed channel, pushing the A piston in the A cavity upwards until the A detection sensor detects a signal, at which point the A feed valve closes. Material B enters the B cavity through the B feed channel, pushing the B piston in the B cavity upwards until the B detection sensor detects a signal, at which point the B feed valve closes. The A discharge valve and the B discharge valve open, and the A screw assembly and the B screw assembly respectively press down the A piston and the B piston. Material A and material B then enter the mixing assembly and are mixed before being discharged.

[0010] Furthermore, the A detection sensor is an A proximity switch installed at the bottom of the A drive block. When the A piston is lifted, the A proximity switch receives the signal from the A piston.

[0011] Furthermore, the B detection sensor is a B proximity switch installed at the bottom of the B drive block. When the B piston is lifted, the B proximity switch receives the signal from the B piston.

[0012] Furthermore, both the A lead screw assembly and the B lead screw assembly include a lead screw and a drive motor installed at one end of the lead screw. A lifting block is provided on the drive nut of the lead screw, and a guide rod is provided on the mounting bracket. One side of the lifting block is slidably connected to the guide rod, and the other side of the lifting block is fixedly connected to either the A drive block or the B drive block.

[0013] Furthermore, the mixing component is a static mixing tube.

[0014] This invention also discloses a dual-drive variable ratio metering method, which employs the aforementioned dual-drive variable ratio metering system, and includes the following steps: S100: Perform feeding operation on feed channels A and B; S200: Material A enters cavity A through feed channel A, pushing piston A in cavity A upward until sensor A detects a signal, then feed valve A closes. Material B enters cavity B through feed channel B, pushing piston B in cavity B upward until sensor B detects a signal, then feed valve B closes. S300: When discharge valves A and B are opened, screw assembly A and screw assembly B press down pistons A and B respectively, and materials A and B enter the mixing assembly and are then mixed and discharged.

[0015] The beneficial effects of this invention are: 1. This system achieves independent and precise driving of metering piston cylinders A and B through the configuration of drive components A and B. This independent driving method eliminates the need for large-scale redesign of the overall metering system when material ratios change. Simply adjusting the operating parameters of drive components A and B allows for rapid adaptation to metering requirements with varying material ratios, significantly saving time and modification costs.

[0016] 2. In this structure, pistons A and B rise passively by the delivery pressure of the glue, thus avoiding the occurrence of empty cavities or incomplete filling in cavities A and B.

[0017] 3. The A metering piston cylinder and B metering piston cylinder in this structure have independent feeding and discharging control. Combined with the accurate feedback of the detection sensor, the accuracy and consistency of glue injection are ensured, which effectively solves the limitations of traditional metering methods when facing various glue materials, different ratios and complex glue injection paths. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the dual-drive variable ratio metering system according to an embodiment of this application.

[0019] Figure 2 This is a cross-sectional view of a dual-drive variable ratio metering system according to an embodiment of this application.

[0020] Figure 3 This is a schematic diagram of the structure of the A drive block of the dual-drive variable ratio metering system according to an embodiment of this application.

[0021] The components in the diagram are labeled as follows: Mounting bracket 1, A metering piston cylinder 2, B metering piston cylinder 3, A piston 4, B piston 5, mixing assembly 6, A feed channel 7, A discharge channel 8, A feed valve 9, A discharge valve 10, B feed channel 11, B discharge channel 12, B feed valve 13, B discharge valve 14, A drive block 15, A detection sensor 16, lead screw 17, drive motor 18, lifting block 19. Detailed Implementation

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 and Figure 2As shown, embodiments of this application disclose a dual-drive variable ratio metering system, including a mounting frame 1, on which an A metering piston cylinder 2 and a B metering piston cylinder 3 are disposed. The A metering piston cylinder 2 is provided with an A cavity, and the B metering piston cylinder 3 is provided with a B cavity. It also includes an A piston 4 disposed in the A cavity and a B piston 5 disposed in the B cavity; it also includes an A drive assembly for driving the movement of the A piston 4 and a B drive assembly for driving the movement of the B piston 5; and it also includes a mixing assembly 6, with the discharge ends of the A cavity and the B cavity respectively connected to the mixing assembly 6.

[0024] It should be explained that the volumes of cavity A and cavity B can be the same or different, depending on the actual needs.

[0025] In practice, material A is fed into cavity A, and material B is fed into cavity B. During dispensing, drive components A and B drive components drive pistons A 4 and B 5 downwards, respectively. Under pressure, materials A and B enter mixing component 6 from cavities A and B, respectively. In mixing component 6, materials A and B are thoroughly mixed according to a preset ratio, and then discharged through the outlet, completing the dispensing process.

[0026] In this structure, since the A drive component and the B drive component can operate independently, the ratio of material A and material B can be flexibly adjusted according to actual needs without requiring large-scale modifications to the overall metering system.

[0027] In this embodiment, the bottom of cavity A is provided with an A feeding channel 7 and an A discharging channel 8, respectively. An A feeding valve 9 is provided in the A feeding channel 7, and an A discharging valve 10 is provided in the A discharging channel 8. The bottom of cavity B is provided with a B feeding channel 11 and a B discharging channel 12, respectively. A B feeding valve 13 is provided in the B feeding channel 11, and a B discharging valve 14 is provided in the B discharging channel 12. The A discharging channel 8 and the B discharging channel 12 are respectively connected to the mixing component 6.

[0028] When the dispensing operation begins, feed valve A 9 opens, and material A enters cavity A through feed channel A 7. As material A continues to enter, the pressure inside cavity A gradually increases, pushing piston A 4 upward. When piston A 4 reaches a certain position, feed valve A 9 automatically closes, stopping the continued entry of material A. Simultaneously, feed valve B 13 opens, and material B enters cavity B through feed channel B 11. Similarly, the pressure inside cavity B pushes piston B 5 upward. When piston B 5 reaches a certain position, feed valve B 13 closes, thus completing the feeding operation of cavities A and B. During dispensing, discharge valves A 10 and B 14 open simultaneously. Piston A 4 moves downward, pressing material A from cavity A through discharge channel A 8 into mixing assembly 6. Piston B 5 moves downward, pressing material B from cavity B through discharge channel B 12 into mixing assembly 6. Finally, the mixed material is discharged through mixing assembly 6.

[0029] In this embodiment, the A drive assembly includes an A drive block 15 and an A lead screw assembly that drives the A drive block 15 to move up and down. The A drive block 15 is located at the upper end of the A piston 4, and an A detection sensor 16 that cooperates with the A piston 4 is provided at the bottom of the A drive block 15. The B drive assembly includes a B drive block and a B lead screw assembly that drives the B drive block to move up and down. The B drive block is located at the upper end of the B piston 5, and a B detection sensor that cooperates with the B piston 5 is provided at the bottom of the B drive block.

[0030] Specifically, when material A enters cavity A through feed channel 7, piston 4 moves upward. When piston 4 touches sensor 16, it indicates that cavity A is full. Sensor 16 transmits a signal to the control system, which then closes feed valve 9 to stop further entry of material A. Similarly, when material B enters cavity B through feed channel 11, piston 5 rises and touches sensor 13, closing feed valve 13.

[0031] This design ensures that cavities A and B are accurately filled to their preset capacity, avoiding measurement errors caused by insufficient or excessive material filling. Furthermore, pistons A and B in this structure are passively raised by the adhesive delivery pressure, thus preventing empty cavities or incomplete filling in cavities A and B.

[0032] In this embodiment, the A detection sensor 16 is an A proximity switch installed at the bottom of the A drive block 15. When the A piston 4 is lifted, the A proximity switch receives the signal from the A piston 4. The B detection sensor is a B proximity switch installed at the bottom of the B drive block. When the B piston 5 is lifted, the B proximity switch receives the signal from the B piston 5.

[0033] Specifically, both proximity switches A and B are high-precision sensing elements capable of quickly and accurately detecting changes in piston position. When piston A 4 is lifted to a preset position by material A, proximity switch A immediately senses the piston's approach and rapidly converts this signal into an electrical signal, transmitting it to the control system. Similarly, when piston B 5 rises to the corresponding position under the influence of material B, proximity switch B will also perform the same signal transmission operation. This signal transmission method allows the control system to monitor the material filling status of chambers A and B in real time, thereby precisely controlling the opening and closing of the feed valve.

[0034] In this embodiment, both the A lead screw assembly and the B lead screw assembly include a lead screw 17 and a drive motor 18 installed at one end of the lead screw 17. A lifting block 19 is provided on the drive nut of the lead screw 17, and a guide rod is provided on the mounting bracket 1. One side of the lifting block 19 is slidably connected to the guide rod, and the other side of the lifting block 19 is fixedly connected to the A drive block 15 or the B drive block.

[0035] Specifically, after the drive motor 18 starts, it drives the lead screw 17 to rotate. The rotation of the lead screw 17 causes the drive nut to move linearly, which in turn drives the lifting block 19 to slide up and down along the guide rod. Since the lifting block 19 is fixedly connected to drive block A 15 or drive block B, the up and down movement of the lifting block 19 directly drives the lifting of drive block A 15 or drive block B.

[0036] The above design ensures that the A drive assembly and B drive assembly can stably and accurately drive the A piston 4 and B piston 5 to move up and down, thereby achieving accurate metering and discharge of materials in the A and B cavities. At the same time, the guide rod also plays a guiding and stabilizing role, preventing the lifting block 19 from shifting or wobbling during movement, further improving the stability and reliability of the entire metering system.

[0037] In this embodiment, the mixing component 6 is a static mixing tube.

[0038] Specifically, a static mixing tube is a device that can mix materials without external power. It typically has a specific spiral or twisted blade structure inside. When material A and material B enter the static mixing tube from chamber A and chamber B respectively through their respective outlet channels, guided by the blade structure inside the tube, the two materials flow and collide along a complex path. This flow and collision process allows material A and material B to be thoroughly mixed together, resulting in a uniform mixing effect.

[0039] This invention also discloses a dual-drive variable ratio metering method, which employs the aforementioned dual-drive variable ratio metering system, and includes the following steps: S100: Perform feeding operation on feed channel A 7 and feed channel B 11; S200: Material A enters the cavity A through the feeding channel 7 and pushes the piston 4 in the cavity A upward until the detection sensor 16 detects the signal, and the feeding valve 9 closes. Material B enters the cavity B through the feeding channel 11 and pushes the piston 5 in the cavity B upward until the detection sensor detects the signal, and the feeding valve 13 closes. S300: When discharge valve 10 (A) and discharge valve 14 (B) are opened, piston 4 (A) and piston 5 (B) are pressed down by screw assembly A and screw assembly B respectively. Material A and material B enter the mixing assembly 6 and are then mixed and discharged.

[0040] This method achieves precise metering and mixing of materials in different proportions. In actual operation, feeding is first performed through feed channels A (7) and B (11) to ensure that materials A and B can smoothly enter their respective chambers. Next, after material A enters chamber A, it pushes piston A (4) upwards. When piston A (4) reaches a preset position and triggers sensor A (16), feed valve A (9) automatically closes, stopping further entry of material A. Similarly, after material B enters chamber B, it pushes piston B (5) upwards, triggering sensor B (13), which then closes feed valve B (13). This process ensures that chambers A and B are accurately filled to their preset capacity, avoiding metering errors caused by insufficient or excessive filling. Subsequently, when discharge is required, discharge valves A (10) and B (14) open simultaneously. Screw assemblies A and B drive pistons A (4) and B (5) downwards, respectively, forcing the materials in chambers A and B through their respective discharge channels into mixing assembly 6. In the mixing assembly 6, materials A and B are thoroughly mixed according to a preset ratio and finally discharged through the outlet, completing the entire dispensing process. This method, by independently driving pistons A 4 and B 5, achieves rapid adaptation and accurate metering for materials with different proportions, greatly improving production efficiency and product quality.

[0041] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-drive variable ratio metering system, characterized in that: It includes a mounting frame (1), on which an A metering piston cylinder (2) and a B metering piston cylinder (3) are provided. The A metering piston cylinder (2) has an A cavity, and the B metering piston cylinder (3) has a B cavity. It also includes an A piston (4) disposed in the A cavity and a B piston (5) disposed in the B cavity. It also includes an A drive assembly for driving the movement of piston A (4) and a B drive assembly for driving the movement of piston B (5); It also includes a mixing component (6), and the discharge ends of the A cavity and the B cavity are respectively connected to the mixing component (6).

2. The dual-drive variable ratio metering system as described in claim 1, characterized in that: The bottom of cavity A is provided with an A feeding channel (7) and an A discharging channel (8). An A feeding valve (9) is provided in the A feeding channel (7), and an A discharging valve (10) is provided in the A discharging channel (8). The bottom of cavity B is provided with a B feeding channel (11) and a B discharging channel (12). A B feeding valve (13) is provided in the B feeding channel (11), and a B discharging valve (14) is provided in the B discharging channel (12). The A discharging channel (8) and the B discharging channel (12) are respectively connected to the mixing component (6).

3. The dual-drive variable ratio metering system as described in claim 1, characterized in that: The A drive assembly includes an A drive block (15) and an A lead screw assembly that drives the A drive block (15) to move up and down. The A drive block (15) is located at the upper end of the A piston (4), and an A detection sensor (16) that cooperates with the A piston (4) is provided at the bottom of the A drive block (15).

4. The dual-drive variable ratio metering system as described in claim 3, characterized in that: The B drive assembly includes a B drive block and a B lead screw assembly that drives the B drive block to move up and down. The B drive block is located at the upper end of the B piston (5), and a B detection sensor that cooperates with the B piston (5) is provided at the bottom of the B drive block.

5. The dual-drive variable ratio metering system as described in claim 4, characterized in that: Material A enters the cavity A through the feeding channel A (7), pushing the piston A (4) in the cavity A upward until the detection sensor A (16) detects a signal, and the feeding valve A (9) closes. Material B enters the cavity B through the feeding channel B (11), pushing the piston B (5) in the cavity B upward until the detection sensor B detects a signal, and the feeding valve B (13) closes. The discharge valve A (10) and discharge valve B (14) open. The screw assembly A and the screw assembly B press down the piston A (4) and piston B (5) respectively. Material A and material B enter the mixing assembly (6) and are then mixed and discharged.

6. The dual-drive variable ratio metering system as described in claim 3, characterized in that: The A detection sensor (16) is an A proximity switch installed at the bottom of the A drive block (15). When the A piston (4) is lifted, the A proximity switch receives the signal from the A piston (4).

7. The dual-drive variable ratio metering system as described in claim 4, characterized in that: The B detection sensor is a B proximity switch installed at the bottom of the B drive block. When the B piston (5) is lifted, the B proximity switch receives the signal from the B piston (5).

8. The dual-drive variable ratio metering system as described in claim 4, characterized in that: Both the A lead screw assembly and the B lead screw assembly include a lead screw (17) and a drive motor (18) installed at one end of the lead screw (17). A lifting block (19) is provided on the drive nut of the lead screw (17). A guide rod is provided on the mounting bracket (1). One side of the lifting block (19) is slidably connected to the guide rod, and the other side of the lifting block (19) is fixedly connected to the A drive block (15) or the B drive block.

9. The dual-drive variable ratio metering system as described in claim 1, characterized in that: The mixing component (6) is a static mixing tube.

10. A dual-drive variable ratio metering method, employing the dual-drive variable ratio metering system described in any one of claims 1 to 9, characterized in that: S100: Perform feeding operations on feed channels A (7) and B (11); S200: Material A enters the cavity A through the A feed channel (7) and pushes the piston (4) in the cavity A upward until the A detection sensor (16) detects the signal, and the A feed valve (9) closes. Material B enters the cavity B through the B feed channel (11) and pushes the piston (5) in the cavity B upward until the B detection sensor detects the signal, and the B feed valve (13) closes. S300: A discharge valve (10) and B discharge valve (14) are opened, and A screw assembly and B screw assembly respectively press down A piston (4) and B piston (5). A material and B material enter the mixing assembly (6) and are mixed and discharged.

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