An additive precise adding device for thin film production

Abstract

The utility model relates to the technical field of film production, specifically disclose a kind of additive accurate adding device for film production, including support frame, top is equipped with controller;Storage tank is fixed in the upper portion of support frame, its bottom is tapered shrink structure and is vertically provided with blanking tube;Metering tank is located below the storage tank, the top of metering tank is equipped with feed inlet, and bottom is equipped with the blanking tube of solenoid valve, the feed inlet coaxial sleeve is connected on the outside of blanking tube;Dynamic sealing assembly, including being located in the lifting baffle of metering tank interior and the tapered sealing head connected in the top of lifting baffle, the tapered sealing head and blanking tube inner wall form separable type sealing cooperation;Double-shaft linkage mechanism;Through dynamic sealing structure and intelligent weighing system, the ultrahigh precision measurement of additive is realized, simultaneously completely solve the problem of material residue and blockage greatly improve production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the field of thin film production technology, and specifically discloses a device for precise addition of additives in thin film production. Background Technology

[0002] In the production of anti-counterfeiting films, the precise addition of additives directly affects the product's optical properties, mechanical properties, and anti-counterfeiting effectiveness. Current technologies primarily rely on manual weighing or flow valve control for additive measurement, which presents the following technical drawbacks: Insufficient measurement accuracy: Traditional flow valve control is affected by material flowability, with an error rate often exceeding 5%, making it difficult to meet the strict requirements of anti-counterfeiting films for additive ratios. Material residue issues: For example, CN214353570U is a device for precise additive addition in anti-counterfeiting film production. Although it reduces adhesion to the inner wall of the weighing box by driving the piston with an electric push rod, the gap between the piston and the box still results in 0.5%-1% additive retention, which accumulates over time and affects the stability of the ratio. Although this solution partially alleviates the weighing interference problem through the design of a suspended feed pipe and a non-contact receiving pipe, it relies on a single weighing sensor and has limited vibration resistance. Furthermore, the additive recovered by the regulating pipe needs to be returned to the material box for re-pumping, which is cumbersome and prone to secondary pollution. In existing devices, the rigid connection between the feed pipe, discharge pipe and weighing box introduces mechanical vibration and external stress, causing the weighing sensor data to drift. Excess additives need to be manually recovered, resulting in low adjustment efficiency and making it unsuitable for continuous production.

[0003] To address the aforementioned problems, this invention provides a precision addition device that integrates dynamic sealing, multi-sensor collaborative metering, and closed-loop control. Utility Model Content

[0004] This invention proposes a precise additive addition device for film production. Through a dynamic sealing structure, a ring array weighing system, and intelligent closed-loop control technology, it achieves ultra-high metering accuracy, completely solving the problems of material residue, inaccurate metering, and clogging that exist in traditional devices. At the same time, the use of a variable diameter spiral shaft anti-clogging design and an automatic feeding system improves the utilization rate of additives and significantly reduces production costs, providing a reliable and precise addition solution for the production of high-end anti-counterfeiting films.

[0005] This invention is achieved as follows: a device for precisely adding additives in thin film production, comprising: Support frame, with a controller mounted on top; The storage tank is fixed to the upper part of the support frame, and its bottom has a tapered concave structure and a vertical discharge pipe; A metering tank is located below the storage tank. The metering tank has a feed inlet at the top and a discharge pipe with a solenoid valve at the bottom. The feed inlet is coaxially sleeved on the outside of the discharge pipe. The dynamic sealing assembly includes a lifting baffle located inside the metering tank and a conical sealing head connected to the top of the lifting baffle. The conical sealing head forms a separable sealing fit with the inner wall of the discharge pipe. The dual-axis linkage mechanism includes electric push rods symmetrically arranged at the bottom of the storage tank. The output end of the electric push rod passes through the side wall of the metering tank and is fixedly connected to the lugs on both sides of the lifting baffle. The weighing monitoring module includes a mounting flange surrounding the outer wall of the metering tank, a ring-shaped support platform fixed to the support frame, and multiple pressure sensors evenly distributed on the upper surface of the support platform. The mounting flange is pressed against the upper surface of the pressure sensors. The controller is connected to the solenoid valve, electric actuator, and pressure sensor.

[0006] As a preferred embodiment of the additive precision addition device for film production according to this utility model, the storage tank is equipped with an anti-wall-sticking stirring mechanism, which includes: A drive motor is installed on the top of the storage tank; A variable diameter spiral shaft is coaxially connected to the output shaft of the drive motor. It has a large-diameter spiral blade at the top and a small-diameter spiral blade at the bottom. The outer edge of the large-diameter spiral blade is in clearance fit with the inner wall of the storage tank, and the outer edge of the small-diameter spiral blade is in clearance fit with the inner wall of the discharge pipe.

[0007] As a preferred embodiment of the additive precision addition device for film production according to this utility model, it further includes a material level monitoring system, the material level monitoring system comprising: A laser rangefinder is installed on the top wall inside the storage tank; An audible and visual alarm is installed on the top of the storage tank. Both the laser rangefinder and the audible and visual alarm are connected to the controller via signal.

[0008] As a preferred embodiment of the additive precision addition device for thin film production according to this utility model, it further includes an automatic replenishment mechanism, wherein the automatic replenishment mechanism comprises: The screw conveyor is inclinedly installed on the side of the support frame, and its discharge end is connected to the upper part of the storage tank through a flexible connecting pipe. A feeding hopper is located above the feed end of the screw conveyor; A servo motor is connected to the auger shaft of the screw conveyor.

[0009] As a preferred embodiment of the additive precision addition device for film production according to this utility model, the cone angle of the conical sealing head is 60°±2°, the outer surface of the conical sealing head is covered with an elastic sealing layer, and the inner wall of the lower end of the feed tube is provided with a chamfered sealing surface that cooperates with the conical sealing head.

[0010] As a preferred embodiment of the additive precision addition device for thin film production according to this utility model, in the weighing monitoring module, the pressure sensors are evenly distributed around the circumference and the number is not less than 4, and the lower surface of the mounting flange is provided with positioning bosses corresponding to the positions of the pressure sensors.

[0011] As a preferred embodiment of the additive precision addition device for thin film production according to this utility model, the drive motor is a variable frequency speed control motor, and its speed is negatively correlated with the feeding rate detected by the pressure sensor.

[0012] The beneficial effects of this utility model are: This utility model features a combination design of a conical sealing head and an elastic sealing layer to ensure reliable sealing. A ring-shaped array of pressure sensors is linked to the dynamic sealing assembly, providing real-time weight data feedback to the controller. This enables instantaneous control of material feeding and opening / closing, preventing overshoot and eliminating contamination issues. Furthermore, the multi-sensor distribution design ensures uniform force distribution, improves metering accuracy, and enables precise addition of additives. Furthermore, the variable diameter spiral blades effectively clean the materials adhering to the tank walls and pipes, and the variable frequency speed control agitator automatically adjusts according to the feeding rate to prevent feeding too fast or too slow; and the entire system is automatically controlled, reducing manual intervention. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 for Figure 1 A magnified structural diagram of point A in the middle.

[0016] Figure 3 This is a cross-sectional structural diagram of the conical sealing head and elastic sealing layer of this utility model.

[0017] Figure 4 This is a top view of the mounting flange of this utility model.

[0018] The markings in the diagram are: 1. Support frame; 2. Controller; 3. Storage tank; 4. Feed pipe; 5. Metering tank; 6. Feed inlet; 7. Solenoid valve; 8. Discharge pipe; 9. Lifting baffle; 10. Conical sealing head; 11. Electric push rod; 12. Mounting flange; 13. Support platform; 14. Pressure sensor; 15. Drive motor; 16. Variable diameter screw shaft; 17. Large diameter screw blade; 18. Small diameter screw blade; 19. Laser rangefinder; 20. Audible and visual alarm; 21. Screw conveyor; 22. Flexible connecting pipe; 23. Feed hopper; 24. Servo motor; 25. Elastic sealing layer; 26. Positioning boss. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0020] Please see Figure 1-4 An additive precision addition device for thin film production, comprising: Support frame 1, with controller 2 mounted on top; The storage tank 3 is fixed to the upper part of the support frame 1. Its bottom has a tapered contraction structure and a vertical discharge pipe 4 is provided. Metering tank 5 is located below storage tank 3. Metering tank 5 has a feed port 6 at the top and a discharge pipe 8 with a solenoid valve 7 at the bottom. The feed port 6 is coaxially sleeved on the outside of the discharge pipe 4. The dynamic sealing assembly includes a lifting baffle 9 located inside the metering tank 5 and a conical sealing head 10 connected to the top of the lifting baffle 9. The conical sealing head 10 forms a separable sealing fit with the inner wall of the discharge pipe 4. The dual-axis linkage mechanism includes electric push rods 11 symmetrically arranged at the bottom of the storage tank 3. The output end of the electric push rods 11 passes through the side wall of the metering tank 5 and is fixedly connected to the ear seats on both sides of the lifting baffle 9. The weighing monitoring module includes a mounting flange 12 surrounding the outer wall of the metering tank 5, a ring-shaped support platform 13 fixed to the support frame 1, and multiple pressure sensors 14 evenly distributed on the upper surface of the support platform 13. The mounting flange 12 is pressed against the upper end face of the pressure sensor 14. The controller 2 is connected to the solenoid valve 7, the electric push rod 11, and the pressure sensor 14.

[0021] In this embodiment: the storage tank 3 is filled with additives, and its conical bottom structure allows the material to naturally gather at the inlet of the discharge pipe 4; the conical sealing head 10 is pressed tightly against the lower end of the discharge pipe 4 to prevent material leakage; when the metering tank 5 is empty, the pressure sensor 14 detects the initial weight and zeros it; when the discharge command is triggered, the controller 2 receives the additive demand signal from the production line and starts the electric push rod 11. The electric push rods 11 on both sides push down the lifting baffle 9 simultaneously, causing the conical sealing head 10 to disengage from the discharge pipe 4, forming a discharge channel; the additives in the storage tank 3 pass through the discharge pipe 4 flows into metering tank 5. When the weight of metering tank 5 increases, multiple pressure sensors 14 on the ring-shaped support platform 13 transmit data to controller 2 in real time. Controller 2 immediately issues a command, the electric push rod 11 retracts, the lifting baffle 9 moves up, and the conical sealing head 10 is pressed back into the lower end of the discharge pipe 4 to block the flow of materials. At the same time, controller 2 opens the solenoid valve 7 at the bottom of metering tank 5, and the additives in the tank are accurately discharged into the feed port of the film production equipment through the discharge pipe 8. After emptying, the solenoid valve 7 closes, the pressure sensor 14 data is reset, and it is ready for the next metering.

[0022] In this embodiment: the drive motor 15 drives the variable diameter spiral shaft 16 to rotate continuously. The upper large-diameter spiral blades 17 are in close contact with the inner wall of the storage tank 3, and the lower small-diameter spiral blades 18 are in contact with the inner wall of the feed pipe 4. Through the scraping and stirring action of the spiral blades, the additives are effectively prevented from sticking to the wall and ensuring that the additives can be smoothly and stably transported from the storage tank 3 to the metering tank 5. This avoids poor transport and metering errors caused by sticking to the wall, further improving the reliability and accuracy of the additive addition process, and ensuring the stability of the film production process and product quality.

[0023] As a technical optimization solution of this utility model, it also includes a material level monitoring system, which includes: Laser rangefinder 19 is installed on the top wall inside storage tank 3; A sound and light alarm 20 is installed on the top of the storage tank 3. Both the laser rangefinder 19 and the audible and visual alarm 20 are connected to the controller 2 via signal.

[0024] In this embodiment: the laser rangefinder 19 is installed on the inner top wall of the storage tank 3, which can monitor the level of the additive in the tank in real time and accurately, and feed the data back to the controller 2; when the level is lower than the preset threshold, the controller 2 triggers the audible and visual alarm 20 installed on the outer top of the storage tank 3, which issues an alarm to the staff in the form of sound and light, reminding them to replenish the additive in time.

[0025] As a technical optimization of this utility model, it also includes an automatic feeding mechanism, which includes: The screw conveyor 21 is inclined on the side of the support frame 1, and its discharge end is connected to the upper part of the storage tank 3 through the flexible connecting pipe 22. The feeding hopper 23 is located above the feed end of the screw conveyor 21; Servo motor 24 is driven by the auger shaft of screw conveyor 21.

[0026] In this embodiment: the operator pours the additive into the screw conveyor 21 through the feeding hopper 23. The servo motor 24 drives the screw shaft of the screw conveyor 21 to rotate, and the additive is transported to the storage tank 3 through the flexible connecting pipe 22. The laser rangefinder 19 monitors the material level in the storage tank 3 in real time and transmits the data to the controller 2. When the material level reaches the set upper limit, the controller 2 controls the servo motor 24 to stop running and stops feeding.

[0027] As a technical optimization of this utility model, the cone angle of the conical sealing head 10 is 60°±2°, the outer surface of the conical sealing head 10 is covered with an elastic sealing layer 25, and the inner wall of the lower end of the feed pipe 4 is provided with a chamfered sealing surface that matches the conical sealing head 10.

[0028] In this embodiment: the cone angle design makes the cone sealing head 10 fit more tightly with the inner wall of the feed pipe 4, and the elastic sealing layer 25 can adapt to the deformation according to the sealing pressure, fill the tiny gaps, and enhance the sealing performance; the chamfered sealing surface provides better guidance and positioning for the cone sealing head 10, further improving the reliability of the seal.

[0029] As a technical optimization of this utility model, in the weighing monitoring module, the pressure sensors 14 are evenly distributed around the circumference and the number is not less than 4, and the lower surface of the mounting flange 12 is provided with a positioning boss 26 corresponding to the position of the pressure sensor 14.

[0030] In this embodiment: at least four pressure sensors 14 are evenly distributed around the circumference, which can uniformly sense the weight change of the metering tank 5 and avoid measurement deviation caused by uneven local force; the precise cooperation between the positioning boss 26 and the pressure sensor 14 ensures that the installation position of the pressure sensor 14 is fixed and stable, preventing displacement due to vibration and other factors during device operation, and ensuring that the pressure sensor 14 always accurately and reliably collects the weight data of the additive in the metering tank 5.

[0031] As a technical optimization of this utility model, the drive motor 15 is a variable frequency speed control motor, and its speed is negatively correlated with the feeding rate detected by the pressure sensor 14.

[0032] In this embodiment, the drive motor 15 speed and the feeding rate are negatively correlated. When the pressure sensor 14 detects that the feeding rate is too fast, the controller 2 automatically reduces the drive motor 15 speed to reduce the stirring force and avoid the additive splashing or feeding too fast due to excessive stirring. When the feeding rate is too slow, the controller 2 increases the drive motor 15 speed to enhance the stirring effect and promote the smooth feeding of the additive.

[0033] Working principle and usage process of this utility model: The operator pours the additive into the screw conveyor 21 through the feeding hopper 23; the servo motor 24 drives the auger shaft of the screw conveyor 21 to rotate, conveying the additive to the storage tank 3 through the flexible connecting pipe 22; when adding material, the controller 2 controls the electric push rod 11 of the dual-axis linkage mechanism to extend, the electric push rod 11 pushes the lifting baffle 9 and the connected conical sealing head 10 to descend, so that the conical sealing head 10 separates from the inner wall of the discharge pipe 4, and the additive in the storage tank 3 flows into the metering tank 5 through the vertical discharge pipe 4; the weighing monitoring module on the outer wall of the metering tank 5 starts to work, the pressure sensor 14 detects the weight of the additive in the metering tank 5 in real time, and transmits the data to the controller 2; when the weight of the additive in the metering tank 5 reaches the preset value, the controller 2 controls The electric push rod 11 shortens, causing the lifting baffle 9 and the conical sealing head 10 to rise. The conical sealing head 10 forms a sealing fit with the inner wall of the feeding pipe 4, stopping the feeding. Meanwhile, the controller 2 controls the solenoid valve 7 of the discharge pipe 8 at the bottom of the metering tank 5 to open, and the metered additive is discharged through the discharge pipe 8 and added to the corresponding process in film production. After the addition is completed, the solenoid valve 7 closes, waiting for the next metering and addition command. The laser rangefinder 19 monitors the material level in the storage tank 3 in real time and transmits the data to the controller 2. When the material level is lower than the set threshold, the controller 2 controls the audible and visual alarm 20 to issue an audible and visual alarm, reminding the operator to replenish the material in time. When the material level reaches the set upper limit, the controller 2 controls the servo motor 24 to stop running, stopping the replenishment.

[0034] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A device for precisely adding additives in thin film production, characterized in that, include: Support frame (1), with controller (2) mounted on top; The storage tank (3) is fixed to the upper part of the support frame (1), and its bottom has a tapered contraction structure and a vertical discharge pipe (4). Metering tank (5) is located below the storage tank (3). The metering tank (5) has a feed port (6) at the top and a discharge pipe (8) with a solenoid valve (7) at the bottom. The feed port (6) is coaxially sleeved on the outside of the discharge pipe (4). The dynamic sealing assembly includes a lifting baffle (9) located inside the metering tank (5) and a conical sealing head (10) connected to the top of the lifting baffle (9). The conical sealing head (10) forms a separable sealing fit with the inner wall of the discharge pipe (4). The dual-axis linkage mechanism includes an electric push rod (11) symmetrically arranged at the bottom of the storage tank (3). The output end of the electric push rod (11) passes through the side wall of the metering tank (5) and is fixedly connected to the ear seats on both sides of the lifting baffle (9). The weighing monitoring module includes a mounting flange (12) surrounding the outer wall of the metering tank (5), a ring-shaped support platform (13) fixed to the support frame (1), and a plurality of pressure sensors (14) evenly distributed on the upper surface of the support platform (13). The mounting flange (12) is pressed against the upper end face of the pressure sensor (14). The controller (2) is connected to the solenoid valve (7), the electric push rod (11) and the pressure sensor (14).

2. The additive precision addition device for thin film production according to claim 1, characterized in that: The storage tank (3) is equipped with an anti-wall-sticking stirring mechanism, which includes: A drive motor (15) is installed on the top of the storage tank (3); The variable diameter spiral shaft (16) is coaxially connected to the output shaft of the drive motor (15). It has a large diameter spiral blade (17) on its upper part and a small diameter spiral blade (18) on its lower part. The outer edge of the large diameter spiral blade (17) is in clearance fit with the inner wall of the storage tank (3), and the outer edge of the small diameter spiral blade (18) is in clearance fit with the inner wall of the feed pipe (4).

3. The precise additive addition device for thin film production according to claim 1, characterized in that: It also includes a material level monitoring system, which includes: A laser rangefinder (19) is installed on the top wall inside the storage tank (3); An audible and visual alarm (20) is installed on the top of the storage tank (3); The laser rangefinder (19) and the audible and visual alarm (20) are both connected to the controller (2) via signal.

4. The precise additive addition device for thin film production according to claim 1, characterized in that: It also includes an automatic feeding mechanism, which comprises: The screw conveyor (21) is inclined on the side of the support frame (1), and the discharge end is connected to the upper part of the storage tank (3) through the flexible connecting pipe (22); The feeding hopper (23) is located above the feed end of the screw conveyor (21); The servo motor (24) is driven by the auger shaft of the screw conveyor (21).

5. The precise additive addition device for thin film production according to claim 1, characterized in that: The cone angle of the conical sealing head (10) is 60°±2°. The outer surface of the conical sealing head (10) is covered with an elastic sealing layer (25). The inner wall of the lower end of the feed pipe (4) is provided with a chamfered sealing surface that matches the conical sealing head (10).

6. The precise additive addition device for thin film production according to claim 1, characterized in that: In the weighing monitoring module, the pressure sensors (14) are evenly distributed around the circumference and there are no less than 4 of them. The lower surface of the mounting flange (12) is provided with a positioning boss (26) corresponding to the position of the pressure sensor (14).

7. The precise additive addition device for thin film production according to claim 2, characterized in that: The drive motor (15) is a variable frequency speed control motor, and its speed is negatively correlated with the feeding rate detected by the pressure sensor (14).

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