Carton sealing paste feeding device and system

Abstract

The invention discloses a box sealing paste feeding device and system. The box sealing paste feeding device comprises a storage tank; the upper pressing disc assembly is arranged in the material storage tank in a liftable mode, the upper pressing disc assembly comprises an upper pressing disc and a sealing disc arranged at the bottom of the upper pressing disc, the sealing disc is in sealing fit with the inner wall of the material storage tank, a sealing space used for containing box sealing paste is defined, and the lower side wall of the sealing space communicates with the spiral pump device; the driving unit comprises at least one air cylinder, a piston rod of the air cylinder is connected with the upper pressing disc, and the piston rod can stretch out and draw back in the vertical direction to drive the upper pressing disc assembly to ascend and descend in the material storage tank so as to achieve discharging of the spiral pump device. The sealing disc is in sealing fit with the inner wall of the storage tank, so that the box sealing paste is isolated from air, and the problem of material hardening is completely eradicated; the air cylinder drives the upper pressing disc to conduct active discharging, the air suction phenomenon of the screw pump is eliminated, and feeding continuity and stability are guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of sealing paste supply technology, specifically relating to a sealing paste supply device and system. Background Technology

[0002] Sealing compound is a key material used in casting production for sealing sand molds (cores) during assembly. Its coating quality directly affects the forming accuracy and surface quality of the castings. Before assembling the sand mold, a strip of sealing compound of a certain width and height needs to be applied to the parting surface or core head of the sand mold to form a seal and prevent molten metal leakage during pouring. With the increasing automation in the casting industry, the application of sealing compound is gradually shifting from manual operation to automated robotic application.

[0003] In automated coating systems, a stable and quantitative supply of sealing compound is a prerequisite for achieving high-quality coating. However, when sealing compound comes into contact with air, moisture evaporates easily, causing the surface material to dry and harden. Hardened material lumps entering the screw pump can easily cause pump jamming or pipeline blockage, severely affecting operational continuity and requiring frequent shutdowns for cleaning.

[0004] In addition, the feed pressure at the screw pump inlet is unstable, which ultimately leads to large fluctuations in the width and height of the coated rubber strip, making it difficult to meet the strict requirements of the casting process for the uniformity of the sealing strip size.

[0005] Therefore, how to provide a sealing paste feeding device that can achieve reliable sealing and ensure stable material supply is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] This invention provides a sealing paste feeding device and system. By setting an upper pressure plate assembly that seals with the inner wall of the storage tank, a reliable seal between the sealing plate and the inner wall of the storage tank is achieved, thereby solving the problems of material leakage, hardening and supply interruption caused by seal failure.

[0007] The technical solution adopted in this invention is as follows: A sealing paste feeding device, comprising: Storage tanks; The upper pressure plate assembly is vertically and flexibly installed inside the storage tank. The upper pressure plate assembly includes an upper pressure plate and a sealing plate disposed at the bottom of the upper pressure plate. The sealing plate is sealed to the inner wall of the storage tank to form a sealed space for containing the sealing paste. The lower side wall of the sealed space is connected to the screw pump device. The drive unit includes at least one cylinder, the piston rod of which is connected to the upper pressure plate. The piston rod is capable of extending and retracting in the vertical direction, driving the upper pressure plate assembly to rise and fall in the storage tank, thereby realizing the feeding of material into the screw pump device.

[0008] The sealing paste feeding device used in this invention also has the following additional technical features: The drive unit includes multiple cylinders, which are arranged circumferentially outside the storage tank. The upper ends of the piston rods of the multiple cylinders are connected to the same synchronous connecting plate to achieve synchronous extension and retraction of the multiple cylinders; The synchronous connecting plate is connected to the upper pressure plate via a pressure plate connecting rod, which is located inside the storage tank.

[0009] Multiple pressure plate connecting rods are provided between the synchronous connecting plate and the upper pressure plate, and the multiple pressure plate connecting rods are arranged along the circumference of the storage tank.

[0010] The upper end of the pressure plate connecting rod is connected to the synchronous connecting plate, and the lower end is connected to the upper pressure plate. The synchronous connecting plate is provided with a positioning countersunk hole, and at least a portion of the upper end of the pressure plate connecting rod is embedded in the positioning countersunk hole. The synchronous connecting plate is also provided with fixing bolt holes corresponding to the positioning countersunk holes, so as to fix it to the pressure plate connecting rod by bolts.

[0011] The locating countersunk hole has a variable diameter design along its circumferential direction to form a locating flat opening.

[0012] The upper end of the pressure plate connecting rod is connected to the synchronous connecting plate, and the lower end is connected to the upper pressure plate. The lower end of the pressure plate connecting rod is threaded to connect with the upper pressure plate.

[0013] The cylinder has a cylinder chamber to accommodate the vertical movement of the piston rod. A material level sensor is provided at the lower end of the cylinder cavity, and a material level sensor is provided at the upper end of the cylinder cavity. The lower end of the piston rod is provided with a material level trigger to trigger the lower material level sensor or the upper material level sensor.

[0014] When the material level triggering component triggers the material level sensor, it indicates that there is a shortage of material in the sealed space; When the material level trigger triggers the upper material level sensor, it prompts the injection of sealing paste into the sealed space.

[0015] A vibration motor is disposed on the outer wall of the storage tank and is used to operate when injecting sealing compound into the sealed space; The upper pressure plate assembly is also provided with an exhaust valve that connects to the sealed space to discharge gas.

[0016] The second aspect of the present invention employs a sealing paste supply system, comprising: A spiral pump device, comprising a base having a spiral chamber, a spiral rod disposed in the spiral chamber, and a spiral pump for driving the spiral rod to rotate; The sealing paste feeding device is located on the base, and a supporting flexible connection is provided between the sealing paste feeding device and the base. A flexible feeding connection is provided between the lower sidewall of the sealed space and the spiral chamber to feed material into the spiral chamber.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by this invention are as follows: 1. In this invention, a liftable upper pressure plate assembly is installed inside the storage tank. Specifically, a sealing plate is provided at the bottom of the upper pressure plate. The sealing plate seals against the inner wall of the storage tank, forming a sealed space for containing the sealing paste. The sealing paste is completely enclosed within this sealed space, thoroughly isolated from external air. This solves the problem of material hardening caused by moisture evaporation, ensures the fluidity and coating performance of the sealing paste, and avoids equipment failure and downtime for cleaning due to material hardening.

[0018] Furthermore, the upper pressure plate assembly is driven to rise and fall within the storage tank by the drive unit, enabling active feeding into the screw pump device. When the piston rod of the cylinder drives the upper pressure plate assembly downward, the upper pressure plate applies a continuous and stable positive pressure to the sealing compound within the sealed space, forcibly pushing the material to the feed inlet of the screw pump device, eliminating the suction phenomenon caused by insufficient material flow or poor feeding. This ensures the continuity and stability of the feeding, significantly reducing downtime and scrap caused by feeding interruptions.

[0019] This invention achieves the isolation of the sealing paste from air through the sealing fit between the sealing disc and the inner wall of the storage tank, thus eliminating the problem of material hardening; and by driving the upper pressure plate with a cylinder to actively discharge the material, the phenomenon of air suction by the screw pump is eliminated, ensuring the continuity and stability of the material supply. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a side view of the sealing paste supply system according to one embodiment of the present invention; Figure 2 for Figure 1 AA section diagram; Figure 3 This is a diagram showing the combination relationship between the synchronous connecting plate, the pressure plate connecting rod, and the upper pressure plate assembly according to one embodiment of the present invention. Figure 4 for Figure 3 BB section diagram; Figure 5 This is a structural diagram of the synchronous connection plate according to one embodiment of the present invention; Figure 6 This is a structural diagram of the pressure plate connecting rod according to one embodiment of the present invention.

[0021] in: 1. Storage tank; 2. Upper pressure plate assembly; 21. Upper pressure plate; 22. Sealing plate; 3. Screw pump assembly; 31. Base; 32. Screw chamber; 33. Screw rod; 34. Screw pump; 4. Drive unit; 41. Cylinder; 411. Piston rod; 412. Cylinder chamber; 413. Lowering level sensor; 414. Uppering level sensor; 42. Reversing valve; 51. Synchronous connecting plate; 511. Positioning countersunk hole; 512. Fixing bolt hole; 513. Positioning flat end; 52. Pressure plate connecting rod; 521. Connecting thread; 61. Vibration motor; 62. Exhaust valve; 71. Support flexible connection; 72. Material feeding flexible connection. Detailed Implementation

[0022] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0024] like Figure 1 and Figure 2 As shown, a sealing paste feeding device includes: Storage tank 1; The upper pressure plate assembly 2 is vertically and flexibly installed inside the storage tank 1. The upper pressure plate assembly 2 includes an upper pressure plate 21 and a sealing plate 22 disposed at the bottom of the upper pressure plate 21. The sealing plate 22 is sealed to the inner wall of the storage tank 1 to form a sealed space for containing the sealing paste. The lower side wall of the sealed space is connected to the spiral pump device 3. The drive unit 4 includes at least one cylinder 41. The piston rod 411 of the cylinder 41 is connected to the upper pressure plate 21. The piston rod 411 can extend and retract in the vertical direction to drive the upper pressure plate assembly 2 to rise and fall in the storage tank 1, so as to realize the feeding of material to the spiral pump device 3.

[0025] This invention provides a sealing paste supply device for storing and supplying sealing paste in casting production, providing a stable and continuous material source for subsequent automated coating operations. The sealing paste supply device mainly includes: a storage tank 1, an upper pressure plate assembly 2, and a drive unit 4. For ease of understanding, a screw pump device 3 used in conjunction with the supply device is also shown in the figure.

[0026] Storage tank 1 is the material container of this device, used to hold sealing paste. Storage tank 1 is generally cylindrical in shape, and has an internal cavity for holding materials.

[0027] The sidewalls of the storage tank 1 are preferably made of metal to ensure sufficient structural strength. The inner wall of the storage tank 1 is precision machined to have a high surface finish and dimensional accuracy, so as to form a good sealing fit with the sealing disc 22 of the upper pressure plate assembly 2.

[0028] The upper pressure plate assembly 2 is vertically and flexibly disposed inside the storage tank 1. Specifically, the upper pressure plate assembly 2 is located in the receiving cavity of the storage tank 1 and can reciprocate along the axial direction (i.e., the vertical direction) of the storage tank 1.

[0029] The upper pressure plate assembly 2 specifically includes an upper pressure plate 21 and a sealing plate 22 disposed at the bottom of the upper pressure plate 21.

[0030] The upper pressure plate 21 is a rigid disc-shaped structure, with its outer diameter slightly smaller than the inner diameter of the storage tank 1, so as to facilitate free lifting and lowering within the storage tank 1. A connecting structure is provided on the top of the upper pressure plate 21 for connecting with the drive unit 4.

[0031] The sealing disc 22 is fixedly installed at the bottom of the upper pressure plate 21. In this embodiment, the sealing disc 22 is made of a rubber material with good elasticity and wear resistance, such as nitrile rubber or fluororubber. The outer diameter of the sealing disc 22 is larger than that of the upper pressure plate 21. When the upper pressure plate assembly 2 is installed in the storage tank 1, the periphery of the sealing disc 22 fits tightly against the inner wall of the storage tank 1, forming an interference fit.

[0032] The sealing disc 22 and the inner wall of the storage tank 1 form a sealed space for containing the sealing paste. This sealed space is located below the upper pressure plate assembly 2, and the sealing paste is completely enclosed within this sealed space, isolating it from the outside air.

[0033] The lower side wall of the sealed space (i.e., the bottom area of ​​the storage tank 1) is connected to the screw pump device 3. Specifically, the bottom of the storage tank 1 is provided with a discharge port, which is the opening of the lower side wall of the sealed space, through which the sealing paste enters the screw pump device 3.

[0034] The drive unit 4 is used to drive the upper pressure plate assembly 2 to rise and fall within the storage tank 1. In this embodiment, the drive unit 4 includes at least one cylinder 41, and the piston rod 411 of the cylinder 41 is connected to the upper pressure plate 21.

[0035] Specifically, such as Figure 2 As shown, cylinder 41 is fixedly installed on the outside of storage tank 1, for example, it can be installed on the side of storage tank 1 by means of a bracket. The piston rod 411 of cylinder 41 is arranged in the vertical direction, and the piston rod 411 can extend and retract in the vertical direction in response to the drive of cylinder 41, thereby driving the upper pressure plate assembly 2 to rise and fall inside storage tank 1.

[0036] When cylinder 41 drives piston rod 411 to move downward, piston rod 411 pushes upper pressure plate assembly 2 downward, and upper pressure plate 21 and sealing plate 22 move downward accordingly; when cylinder 41 drives piston rod 411 to move upward, piston rod 411 pulls upper pressure plate assembly 2 upward, and upper pressure plate 21 and sealing plate 22 move upward accordingly.

[0037] In the initial state, the drive unit 4 drives the upper pressure plate assembly 2 to rise to the upper position of the storage tank 1 so as to add sealing paste into the storage tank 1.

[0038] After feeding is completed, the drive unit 4 drives the upper pressure plate assembly 2 downward. The sealing plate 22 contacts the inner wall of the storage tank 1 and undergoes compression deformation, forming a tight seal and enclosing the sealing paste within the sealed space. At this time, the sealing paste is isolated from the outside air, effectively avoiding the problem of material hardening caused by moisture evaporation.

[0039] When the screw pump device 3 is running, the cylinder 41 drives the piston rod 411 to retract, pushing the upper pressure plate 21 downwards and applying a continuous and stable positive pressure to the sealing paste in the sealed space. This pressure forces the paste material towards the discharge port at the bottom of the storage tank 1, continuously replenishing the feed port of the screw pump 34. Compared with the traditional method of relying solely on the self-priming of the screw pump, this active pushing effectively eliminates the suction phenomenon caused by poor material flowability or poor feeding, ensuring the continuity and stability of the supply, and thus guaranteeing the consistency of the adhesive strip size in subsequent coating operations.

[0040] In one specific embodiment of the present invention, the drive unit 4 employs a cylinder 41, which is vertically mounted at the top center of the storage tank 1, and the piston rod 411 is directly connected to the upper pressure plate 21. This design is compact and suitable for small and medium-sized storage tanks 1.

[0041] In other embodiments of the present invention, the drive unit 4 may also include multiple cylinders 41 (e.g., two, three, or four), which are evenly distributed along the circumference of the storage tank 1, and their piston rods 411 are all connected to the upper pressure plate 21. By coordinating the drive of multiple cylinders 41, greater downward pressure can be provided, and the smoothness of the lifting and lowering of the upper pressure plate 21 can be further improved. Multiple cylinders 41 can share a single air source control circuit to achieve synchronized action, such as... Figure 2 As shown.

[0042] It should be noted that the present invention does not limit the number of cylinders 41, as long as they can drive the upper pressure plate 21 to rise and fall.

[0043] In actual operation, this sealing paste feeding device is usually used in conjunction with the spiral pump device 3, coating robot, etc., to form a complete automated coating system. The spiral pump device 3 delivers a quantitative amount of sealing paste pushed out of the sealed space to the coating head, where the robot applies it to the surface of the sand mold according to a preset trajectory.

[0044] This invention solves the problems of hardening of sealing paste and air suction of screw pump by sealing the inner wall of the storage tank 1 with the sealing plate 22 and the active feeding driven by the cylinder 41, which significantly improves the reliability and operating efficiency of the feeding system and realizes the automation of casting.

[0045] As a preferred embodiment of the present invention, such as Figure 2 As shown, the drive unit 4 includes a plurality of cylinders 41, which are arranged circumferentially outside the storage tank 1. The upper ends of the piston rods 411 of the plurality of cylinders 41 are connected to the same synchronous connecting plate 51 to realize the synchronous extension and retraction of the plurality of cylinders 41; The synchronous connecting plate 51 is connected to the upper pressure plate 21 via the pressure plate connecting rod 52, which is located inside the storage tank 1.

[0046] In this preferred embodiment, the drive unit 4 includes a plurality of cylinders 41, which are circumferentially disposed outside the storage tank 1 and evenly distributed along the circumference of the tank body. Figure 2 As shown, the drive unit 4 includes two cylinders 41, with cylinder one and cylinder two respectively located on both sides of the storage tank 1, at opposite ends of the same radial direction. This arrangement of multiple cylinders 41 provides greater downward pressure to accommodate storage tanks 1 of different sizes and sealing pastes of different viscosities. Furthermore, the shared load among multiple cylinders 41 reduces the load on a single cylinder 41, extending its service life.

[0047] The upper ends of the piston rods 411 of the plurality of cylinders 41 are connected to the same synchronous connecting plate 51 to achieve synchronous extension and retraction of the plurality of cylinders 41. Figure 2 As shown, the upper ends of the piston rods 411 of both cylinder 1 and cylinder 2 are fixedly connected to the upper synchronous connecting plate 51. This synchronous connecting plate 51 is a rigid plate structure that connects the piston rods 411 of both cylinders 41. When the pneumatic system controls the cylinders 41 to move via the reversing valve 42, because the piston rods 411 of both cylinders 41 are connected to the same rigid connecting plate, they must extend or retract synchronously, preventing relative movement. This ensures that the piston rods 411 of the two cylinders 41 always maintain the same extension length and movement speed, achieving vertical pressure application.

[0048] The synchronous connecting plate 51 is connected to the upper pressure plate 21 via a pressure plate connecting rod 52, which is located inside the storage tank 1. The pressure plate connecting rod 52 is connected below the synchronous connecting plate 51, and extends into the tank body through a guide hole at the top of the storage tank 1, with its lower end fixedly connected to the upper pressure plate 21. The driving force generated by the cylinder 41 is transmitted to the sealing paste material.

[0049] In the prior art, due to manufacturing errors, installation deviations, or uneven loads on the cylinder 41 itself, the piston rod 411 is prone to slight tilting, resulting in uneven force on the pressure plate and causing bias pressure. This preferred embodiment employs two (or more) cylinders 41 driven in parallel, and forces the piston rods 411 to move synchronously through a rigid synchronous connecting plate 51, so that the driving forces of the multiple cylinders 41 are combined into a stable, vertically downward resultant force. This ensures that the driving force on the upper pressure plate 21 is uniform and vertical from the power source, avoiding tilting caused by unilateral force.

[0050] The synchronous connecting plate 51 gathers the driving force of multiple cylinders 41 and transmits it to the upper pressure plate 21 through the pressure plate connecting rod 52. Since the driving force of multiple cylinders 41 has been combined into a vertically downward resultant force on the synchronous connecting plate 51, the pressure plate connecting rod 52 only needs to transmit this vertical force without bearing additional bending moment or lateral force. The synchronous gathering and vertical transmission of multiple cylinders ensures the uniformity of driving force, simplifies the stress state of the connecting rod, and improves the stability and reliability of the transmission.

[0051] Understandably, biasing can cause the upper pressure plate 21 to tilt, creating a gap between the sealing plate 22 and the inner wall of the storage tank 1, leading to a series of chain reactions such as material leakage, seal failure, and accelerated hardening. This preferred embodiment uses a synchronous connecting plate 51 to ensure that multiple cylinders 41 extend and retract synchronously, ensuring that the upper pressure plate 21 remains horizontal and that the sealing plate 22 maintains a uniform and tight fit with the tank wall, eliminating gaps. This not only solves the material leakage problem but also ensures the long-term effectiveness of the sealing space, allowing the anti-hardening function to operate stably.

[0052] In the actual assembly process, firstly, multiple cylinders 41 are fixed in preset positions, ensuring that the piston rod 411 axis of each cylinder 41 is parallel and perpendicular to the bottom surface of the storage tank 1. Then, the synchronous connecting plate 51 is connected to the upper end of the piston rod 411 of each cylinder 41, and the initial position of the cylinder 41 is adjusted to keep the synchronous connecting plate 51 horizontal. Next, the upper end of the pressure plate connecting rod 52 is fixedly connected to the synchronous connecting plate 51, and the lower end passes through the guide hole at the top of the storage tank 1 and is connected to the upper pressure plate 21. Finally, the sealing plate 22 is installed at the bottom of the upper pressure plate 21, and the contact between the sealing plate 22 and the inner wall of the storage tank 1 is checked to ensure uniform adhesion at all points.

[0053] During operation, the pneumatic system controls the synchronous air intake of each cylinder 41 via the reversing valve 42, causing the piston rods 411 to extend synchronously, pushing the synchronous connecting plate 51, pressure plate connecting rod 52, and upper pressure plate 21 to descend smoothly together. The sealing plate 22 at the bottom of the upper pressure plate 21 moves down accordingly, always maintaining a tight fit with the inner wall of the storage tank 1, applying uniform vertical pressure to the sealing paste in the sealed space. When material needs to be added or maintenance is required, the reversing valve 42 reverses, and each cylinder 41 extends synchronously, causing the upper pressure plate 21 to rise.

[0054] As one embodiment of this implementation, a plurality of pressure plate connecting rods 52 are provided between the synchronous connecting plate 51 and the upper pressure plate 21, and the plurality of pressure plate connecting rods 52 are arranged circumferentially along the storage tank 1.

[0055] like Figures 2 to 4 As shown, two pressure plate connecting rods 52 are provided between the synchronous connecting plate 51 and the upper pressure plate 21. These two connecting rods are symmetrically distributed along the circumference of the storage tank 1, that is, located at both ends in the same radial direction. The upper ends of both pressure plate connecting rods 52 are fixedly connected to the synchronous connecting plate 51, and the lower ends are fixedly connected to the upper pressure plate 21, forming a parallel connection structure. In other embodiments, the number of pressure plate connecting rods 52 can also be three or more, with multiple connecting rods evenly distributed along the circumference of the storage tank 1 to form a more stable support structure.

[0056] In traditional single-link structures, the link and the upper pressure plate 21 are connected at a single point. When the upper pressure plate 21 is subjected to uneven material reaction forces or lateral disturbances, it is prone to swaying or tilting, leading to seal failure. This embodiment uses multiple pressure plate links 52 to form a stable structure. Taking two links as an example, the two links, together with the synchronous connecting plate 51 and the upper pressure plate 21, form a stable double-column frame structure, which greatly improves the anti-sway capability of the upper pressure plate 21 in the horizontal direction. Even when subjected to lateral force disturbances, the two links can restrain each other and resist them together, thereby ensuring that the upper pressure plate 21 always maintains a stable posture.

[0057] The levelness of the upper pressure plate 21 is crucial to ensuring a uniform fit between the sealing plate 22 and the inner wall of the storage tank 1. If the upper pressure plate 21 tilts, one side of the sealing plate 22 will be compressed, while a gap may form on the other side, leading to seal failure. In this embodiment, the circumferential arrangement of multiple pressure plate connecting rods 52 ensures more uniform force distribution at all points on the upper pressure plate 21 and smoother lifting and lowering movements, thereby guaranteeing that the upper pressure plate 21 remains level at any height. The sealing plate 22 maintains a uniform and tight fit with the tank wall at all times, eliminating the possibility of gaps.

[0058] In another embodiment of this method, the upper end of the pressure plate connecting rod 52 is connected to the synchronous connecting plate 51, and the lower end is connected to the upper pressure plate 21. The synchronous connecting plate 51 is provided with a positioning countersunk hole 511, and at least a portion of the upper end of the pressure plate connecting rod 52 is embedded in the positioning countersunk hole 511. The synchronous connecting plate 51 is also provided with a fixing bolt hole 512 corresponding to the positioning countersunk hole 511, so as to be fixed to the pressure plate connecting rod 52 by bolts.

[0059] Specifically, such as Figure 3 and Figure 4 As shown, the upper end of the pressure plate connecting rod 52 is fixedly connected to the synchronous connecting plate 51, and the lower end is fixedly connected to the upper pressure plate 21, thereby realizing the stable transmission of driving force from the synchronous connecting plate 51 to the upper pressure plate 21.

[0060] To achieve more precise positioning and a more reliable connection, the synchronous connection plate 51 is provided with a positioning countersunk hole 511, such as... Figure 5 As shown. The upper end of the pressure plate connecting rod 52 is machined to match the countersunk hole, as shown. Figure 6 As shown, its end is embedded in a countersunk hole and fits into the countersunk hole, thereby achieving precise positioning of the pressure plate connecting rod 52.

[0061] After the positioning countersunk hole 511 is inserted into the upper end of the pressure plate connecting rod 52, the pressure plate connecting rod 52 and the synchronous connecting plate 51 are further locked and fixed by bolts through the fixing bolt hole 512 set on the side of the synchronous connecting plate 51 to prevent relative loosening between the two during use.

[0062] This embedded positioning method, compared to simple planar bonding, has higher positioning accuracy and repeatability, ensuring that multiple pressure plate connecting rods 52 remain parallel to each other and perpendicular to the plane of the synchronous connecting plate 51 after installation, thus ensuring the levelness of the upper pressure plate 21.

[0063] Furthermore, the pressure plate connecting rod 52 may be subjected to lateral forces. If a conventional planar connection method is used, these lateral forces will be entirely borne by the fixing bolts, which can easily lead to shear deformation or even breakage of the bolts. In this embodiment, a countersunk hole 511 structure is used, in which the upper end of the pressure plate connecting rod 52 is embedded. The wall of the countersunk hole mates with the outer wall of the connecting rod, which can directly bear most of the lateral forces and transfer them to the synchronous connecting plate 51 body. At this time, the fixing bolts mainly serve an axial locking function and only bear tensile forces, significantly improving the stress state.

[0064] Specifically, the contour edge of the positioning countersunk hole 511 is designed with a variable diameter along the circumferential direction to form a positioning flat opening 513.

[0065] like Figure 5 As shown, the positioning countersunk hole 511 on the synchronous connecting plate 51 is not a complete circular hole. Its outline edge is subjected to diameter change treatment at one or more positions in the circumferential direction, that is, the radius of the hole wall is changed, thereby forming one or more straight positioning surfaces, namely positioning flat openings 513. Correspondingly, the upper end of the pressure plate connecting rod 52 is provided with a positioning flat head that matches the positioning flat opening 513. The positioning flat head is a planar structure. When the upper end of the pressure plate connecting rod 52 is inserted into the positioning countersunk hole 511, the positioning flat head fits snugly with the positioning flat opening 513.

[0066] The pressure plate connecting rod 52 is fixed to the synchronous connecting plate 51 by embedding it into the positioning countersunk hole 511 and locking it with bolts. However, during long-term reciprocating motion, due to vibration, impact, or lateral force, the pressure plate connecting rod 52 may still experience slight circumferential rotation. Once the pressure plate connecting rod 52 rotates, even if the rotation angle is small, it will cause a change in the levelness of the upper pressure plate 21, creating a gap between the sealing plate 22 and the inner wall of the storage tank 1, ultimately leading to poor sealing and material leakage. In this embodiment, by setting the positioning flat opening 513 and the positioning flat head to cooperate, an anti-rotation structure is formed. When the pressure plate connecting rod 52 is subjected to a circumferential torque, the positioning flat head will directly abut against the positioning flat opening 513, and the synchronous connecting plate 51 body will bear the torque, thereby preventing the rotation of the pressure plate connecting rod 52.

[0067] In another embodiment of this method, the upper end of the pressure plate connecting rod 52 is connected to the synchronous connecting plate 51, and the lower end is connected to the upper pressure plate 21. The lower end of the pressure plate connecting rod 52 is threaded with a connecting thread 521 to be threadedly connected to the upper pressure plate 21.

[0068] Specifically, the upper end of the pressure plate connecting rod 52 is fixedly connected to the synchronous connecting plate 51 through structures such as the positioning countersunk hole 511 and the positioning flat end 513, while the lower end is connected to the upper pressure plate 21. This achieves a stable transmission of driving force from the synchronous connecting plate 51 to the upper pressure plate 21 and bears the tensile and compressive loads generated during the lifting and lowering of the upper pressure plate 21. During the feeding process, the upper pressure plate 21 needs to withstand the reaction force of the sealing paste material. The threaded connection provides sufficient connection strength to ensure that the pressure plate connecting rod 52 and the upper pressure plate 21 will not loosen or undergo relative displacement.

[0069] To ensure a reliable connection between the pressure plate connecting rod 52 and the upper pressure plate 21, and to facilitate assembly and adjustment, the lower end of the pressure plate connecting rod 52 is threaded with a connecting thread 521 for threaded connection with the upper pressure plate 21. Specifically, as follows... Figure 3 , Figure 4 and Figure 6 As shown, the lower end of the pressure plate connecting rod 52 is machined with external threads, and correspondingly, the upper pressure plate 21 has a threaded hole with internal threads. The lower end of the pressure plate connecting rod 52 is screwed into the threaded hole of the upper pressure plate 21, and the two are fixedly connected through the threaded engagement. During installation, the levelness and height position of the upper pressure plate 21 can be finely adjusted by controlling the screwing depth of the pressure plate connecting rod 52, thereby adjusting the upper pressure plate 21 to an ideal level state. This ensures uniform contact between the sealing plate 22 and the inner wall of the storage tank 1, ensuring a good sealing effect.

[0070] In a preferred embodiment of the present invention, the cylinder 41 has a cylinder chamber 412 for accommodating the piston rod 411 to move up and down. A material level sensor 413 is provided at the lower end of the cylinder chamber 412, and a material level sensor 414 is provided at the upper end of the cylinder chamber 412. The lower end of the piston rod 411 is provided with a material level trigger to trigger the lower material level sensor 413 or the upper material level sensor 414.

[0071] like Figure 2 As shown, cylinder 41 has a cylinder chamber 412, and piston rod 411 moves up and down within the cylinder chamber 412. The cylinder chamber 412 is a closed cavity that is connected to an external air source, and the piston rod 411 is driven by controlling the intake and exhaust of air.

[0072] A discharge level sensor 413 is installed at the bottom of the cylinder chamber 412 (near the piston position when the piston rod 411 is retracted to its limit position); an load level sensor 414 is installed at the top of the cylinder chamber 412 (near the piston position when the piston rod 411 is extended to its limit position). These sensors can be proximity switches, magnetic switches, photoelectric sensors, etc., and are used to detect the position of the piston within the cylinder chamber 412.

[0073] A material level trigger is provided at the lower end of the piston rod 411 (i.e., on the piston located in the cylinder chamber 412), and the trigger moves together with the piston rod 411. When the piston rod 411 moves to a specific position, the material level trigger will approach the corresponding sensor, thereby triggering the sensor to send a signal.

[0074] This embodiment transforms material level detection into piston rod 411 stroke detection. Since the upper pressure plate 21 is fixedly connected to the piston rod 411 via the pressure plate connecting rod 52, the position of the piston rod 411 directly reflects the position of the upper pressure plate 21, and thus reflects the material level inside the storage tank 1. As material is gradually consumed, the upper pressure plate 21 descends, and the piston rod 411 gradually retracts; when the tank is full, the upper pressure plate 21 rises to the top, and the piston rod 411 extends. By detecting the stroke position of the piston rod 411, the material level inside the tank can be indirectly and accurately determined. This indirect detection method avoids the sealing difficulties and material contamination problems caused by installing sensors inside the storage tank 1.

[0075] Specifically, when the material level triggering component triggers the material level sensor 413, it indicates that there is a shortage of material in the sealed space; When the material level triggering component triggers the upper material level sensor 414, it prompts the injection of sealing paste into the sealed space.

[0076] When the material level sensor 413 is triggered, it indicates that the piston rod 411 has retracted to its minimum stroke, meaning the upper pressure plate 21 has descended to its lowest position. At this point, the material in the sealed space is about to be exhausted and needs to be added promptly. After receiving the signal from the material level sensor 413, the controller can issue an audible and visual alarm to prompt the operator to add material.

[0077] When the material level sensor 414 is triggered, it indicates that the piston rod 411 has extended to its maximum stroke, meaning the upper pressure plate 21 has risen to its highest position. At this point, the sealed space is full of material, and feeding can be stopped. This dual detection function provides operators with accurate material level information, avoiding material shortages or overflows caused by untimely observation.

[0078] The material level sensor 413 is electrically connected to the equipment's control system (such as a PLC controller). When the material level sensor 413 detects that the material has reached the discharge level and triggers an alarm, the controller will simultaneously issue a stop command, causing the screw pump device 3, coating robot, and other execution units to immediately stop working, forming a closed-loop control. This effectively avoids the equipment from continuing to run idle when there is a shortage of material, prevents component damage caused by dry grinding of the screw pump, and also avoids waste products caused by interruption of material supply. The system can only be restarted after manual feeding is completed and confirmed, realizing intelligent management of safe production.

[0079] In a preferred embodiment of the present invention, the apparatus further includes: Vibration motor 61 is disposed on the outer wall of the storage tank 1 and is used to operate when injecting sealing paste into the sealed space; The upper pressure plate assembly 2 is also provided with an exhaust valve 62 that connects to the sealed space to discharge gas.

[0080] like Figure 1 As shown, the vibratory motor 61 is fixedly installed on the outer wall of the storage tank 1, typically located in the lower middle part or near the bottom of the tank. The vibratory motor 61 is a device that converts the motion of a rotary motor into vibration. It has an internal eccentric block that generates a periodic excitation force when the motor rotates, causing the storage tank 1 to vibrate at high frequency and small amplitude. This vibratory motor 61 only starts operating when fresh sealing compound is injected into the sealed space; it remains off during normal material feeding and coating processes.

[0081] An exhaust valve 62 is provided at an appropriate position on the upper pressure plate 21 or the sealing plate 22, and the exhaust valve 62 is connected to the sealing space. The exhaust valve 62 can be a manual valve or an automatic valve, which opens when it is necessary to discharge gas from the sealing space and closes after the venting is completed.

[0082] The sealing compound is a paste-like material. When it is added to the storage tank 1, due to the viscosity and limited flowability of the material, air can easily be trapped inside the compound, forming bubbles or pores. If these pores remain in the material, they will enter the screw pump and coating pipeline with the material during subsequent feeding, causing cavities or discontinuities inside the coated adhesive strip, seriously affecting the sealing quality.

[0083] In this embodiment, the vibration motor 61 is activated during material feeding, causing the storage tank 1 to vibrate at high frequency. The vibration is transmitted to the paste-like material inside the tank through the tank wall. Under the action of vibration, the air bubbles inside the material are disturbed and move upward, gradually converging to the surface of the material, thereby effectively eliminating the pores generated during the feeding process and improving the density and uniformity of the material.

[0084] At this point, the vent valve 62 located on the upper pressure plate assembly 2 is opened, allowing the accumulated gas to be discharged from the sealed space under the pressure of the upper pressure plate 21 and its own buoyancy. After the gas is completely discharged, the vent valve 62 is closed, leaving only pure paste-like material in the sealed space, free of any gas. This combination of vibration defoaming and venting ensures the purity of the material in the sealed space and avoids coating defects caused by gas in the material.

[0085] After undergoing vibration defoaming and degassing treatment, the sealing paste is free of air bubbles and has a uniform material density. When this uniform material enters the screw pump and is conveyed to the coating head, the pump's displacement per revolution is more stable, and the output strip size is more precise and controllable. This provides a good material foundation for subsequent closed-loop control of the strip size, helping to improve the consistency and reliability of the final coating quality.

[0086] The second invention provides a sealing paste feeding system, comprising: The spiral pump device 3 includes a base 31, the base 31 having a spiral chamber 32, a spiral rod 33 disposed in the spiral chamber 32, and a spiral pump 34 for driving the spiral rod 33 to rotate. The sealing paste feeding device is located on the base 31, and a supporting flexible connection 71 is provided between the sealing paste feeding device and the base 31. A flexible feeding connection 72 is provided between the lower side wall of the sealed space and the spiral chamber 32 to feed material into the spiral chamber 32.

[0087] like Figure 1 and Figure 2 As shown, the screw pump device 3 includes a base 31, which has a screw chamber 32, a screw rod 33 disposed in the screw chamber 32, and a screw pump 34 that drives the screw rod 33 to rotate. The base 31 provides installation support and positioning reference for the entire system and is typically made of metal casting or welded structure, possessing sufficient strength and rigidity. The screw chamber 32 is disposed inside the base 31 and is a cavity that houses the screw rod 33. Its inlet is connected to a feeding device, and its outlet is connected to a coating pipeline. The screw rod 33 is rotatably mounted inside the screw chamber 32 and is driven to rotate by the motor of the screw pump 34 through a coupling. When the screw rod 33 rotates, it pushes the sealing paste material entering the screw chamber 32 forward to the outlet, achieving quantitative conveying. The screw pump 34 can be a single screw pump, a twin screw pump, etc., selected according to the material characteristics and conveying requirements.

[0088] The sealing paste supply device is mounted on the base 31, and is fixedly connected to the base 31 through its storage tank 1 and related support structure to form an integral structure.

[0089] To achieve vibration isolation and stress relief, a flexible support connection 71 is provided between the sealing paste feeding device and the base 31. The flexible support connection 71 is located between the storage tank 1 and the base 31 to support the weight of the storage tank 1 and also serves as vibration isolation. The flexible support connection 71 can be made of components with elastic and damping characteristics, such as rubber pads, spring dampers, or flexible support seats. When the vibrating motor 61 in the feeding device operates, the generated vibration is effectively isolated by the flexible support connection 71 and will not be transmitted to the base 31 and the screw pump device 3, thereby avoiding any impact on the operational stability and conveying accuracy of the screw pump 34.

[0090] In addition, a flexible feeding connection 72 is provided between the lower sidewall of the sealed space and the spiral chamber 32 to feed material into the spiral chamber 32. The flexible feeding connection 72 connects the outlet of the storage tank 1 (i.e., the lower sidewall of the sealed space) and the inlet of the spiral chamber 32 of the spiral pump device 3 to realize the conveying of sealing paste. The flexible feeding connection 72 is made of flexible tubing, such as rubber hose, corrugated pipe, composite material hose, etc., and has a certain degree of flexibility and deformation capability. This flexible connection has multiple functions: first, it allows for a certain installation position deviation and relative displacement between the storage tank 1 and the spiral pump 34, reducing the requirements for installation accuracy; second, when the vibration motor 61 is working, the flexible feeding connection 72 can absorb and isolate vibration, preventing vibration from being transmitted to the spiral pump 34 along the pipeline; third, the flexible pipe wall can buffer the pressure fluctuations during the feeding process to a certain extent, making the material conveying more stable.

[0091] For any parts not mentioned in this invention, existing technologies can be used or referenced.

[0092] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0093] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A sealing paste feeding device, characterized in that, include: Storage tanks; The upper pressure plate assembly is vertically and flexibly installed inside the storage tank. The upper pressure plate assembly includes an upper pressure plate and a sealing plate disposed at the bottom of the upper pressure plate. The sealing plate is sealed to the inner wall of the storage tank to form a sealed space for containing the sealing paste. The lower side wall of the sealed space is connected to the screw pump device. The drive unit includes at least one cylinder, the piston rod of which is connected to the upper pressure plate. The piston rod is capable of extending and retracting in the vertical direction, driving the upper pressure plate assembly to rise and fall in the storage tank, thereby realizing the feeding of material into the screw pump device.

2. The apparatus according to claim 1, characterized in that, The drive unit includes multiple cylinders, which are arranged circumferentially outside the storage tank. The upper ends of the piston rods of the multiple cylinders are connected to the same synchronous connecting plate to achieve synchronous extension and retraction of the multiple cylinders; The synchronous connecting plate is connected to the upper pressure plate via a pressure plate connecting rod, which is located inside the storage tank.

3. The apparatus according to claim 2, characterized in that, Multiple pressure plate connecting rods are provided between the synchronous connecting plate and the upper pressure plate, and the multiple pressure plate connecting rods are arranged along the circumference of the storage tank.

4. The apparatus according to claim 2, characterized in that, The upper end of the pressure plate connecting rod is connected to the synchronous connecting plate, and the lower end is connected to the upper pressure plate. The synchronous connecting plate is provided with a positioning countersunk hole, and at least a portion of the upper end of the pressure plate connecting rod is embedded in the positioning countersunk hole. The synchronous connecting plate is also provided with fixing bolt holes corresponding to the positioning countersunk holes, so as to fix it to the pressure plate connecting rod by bolts.

5. The apparatus according to claim 4, characterized in that, The locating countersunk hole has a variable diameter design along its circumferential direction to form a locating flat opening.

6. The apparatus according to claim 2, characterized in that, The upper end of the pressure plate connecting rod is connected to the synchronous connecting plate, and the lower end is connected to the upper pressure plate. The lower end of the pressure plate connecting rod is threaded to connect with the upper pressure plate.

7. The apparatus according to claim 1, characterized in that, The cylinder has a cylinder chamber to accommodate the vertical movement of the piston rod. A material level sensor is provided at the lower end of the cylinder cavity, and a material level sensor is provided at the upper end of the cylinder cavity. The lower end of the piston rod is provided with a material level trigger to trigger the lower material level sensor or the upper material level sensor.

8. The apparatus according to claim 7, characterized in that, When the material level triggering component triggers the material level sensor, it indicates that there is a shortage of material in the sealed space; When the material level trigger triggers the upper material level sensor, it prompts the injection of sealing paste into the sealed space.

9. The apparatus according to claim 1, characterized in that, Also includes: A vibration motor is disposed on the outer wall of the storage tank and is used to operate when injecting sealing compound into the sealed space; The upper pressure plate assembly is also provided with an exhaust valve that connects to the sealed space to discharge gas.

10. A sealing paste feeding system, characterized in that, include: A spiral pump device, comprising a base having a spiral chamber, a spiral rod disposed in the spiral chamber, and a spiral pump for driving the spiral rod to rotate; The sealing paste feeding device according to any one of claims 1 to 9, wherein the sealing paste feeding device is disposed on the base, and a supporting flexible connection is provided between the sealing paste feeding device and the base; A flexible feeding connection is provided between the lower sidewall of the sealed space and the spiral chamber to feed material into the spiral chamber.

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