Leakage-proof high-frequency welding device

Abstract

The utility model relates to medical air cushion production technical field, specifically disclose a high frequency welding device of antitracking, set up grounding module, grounding module includes the conductive connecting plate connected in the x direction one side of upper polar plate, fixed in the lower end of conductive connecting plate conductive contact piece, set up in the inside of machine table and with machine table electric connection grounding plate, the upper polar plate will drive the conductive connecting plate, conductive contact piece down when pressing, make conductive contact piece and grounding plate contact, and the grounding plate and the metal shell electric connection of machine table, the metal shell of machine table is connected with the earth again, thereby forms good earthing, avoids the electric leakage.

Description

Technical Field

[0001] This utility model relates to the field of medical air cushion production technology, and in particular to a high-frequency welding device for preventing leakage. Background Technology

[0002] Medical air cushions are cushions that can be inflated with air. When placed under pressure points on bedridden patients, they can relieve pressure, prevent pressure sores, promote blood circulation, reduce pain, and promote sleep.

[0003] Medical air cushions are usually made of PVC film, rubber film, and other film materials through folding, heat melting, and cutting. In the heat melting process, high-frequency welding equipment is usually used for welding. Conventional high-frequency welding equipment has a power supply box that outputs a high voltage, which can easily lead to leakage during the welding process.

[0004] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a high-frequency welding device that prevents leakage, so as to solve the problem that the high-frequency welding devices of the prior art are prone to leakage.

[0006] A high-frequency welding device for preventing leakage includes a machine base and a high-frequency welding mechanism disposed on the machine base. The high-frequency welding mechanism includes a first mounting column fixed to the machine base, a first top plate that is liftably fixed to the first mounting column, a second driving device fixed to the first top plate and drivable along the z-direction, an electrode assembly connected to the output end of the second driving device, and a pressing head fixed to the lower end of the electrode assembly. A grounding module is also provided between the machine base and the high-frequency welding mechanism. The grounding module includes a conductive connecting plate electrically connected to the electrode assembly, a conductive contact fixed to the lower end of the conductive connecting plate, and a grounding plate disposed inside the machine base and electrically connected to the machine base. The conductive contact can move downward along the z-direction until it abuts against the grounding plate.

[0007] Specifically, the electrode assembly includes a first pressure plate fixed to the output end of the second driving device, an upper electrode plate fixed to the lower end of the first pressure plate, a lower electrode plate fixed to the lower end of the upper electrode plate, a power supply box for supplying power to the upper electrode plate and the lower electrode plate, a conductive connecting plate electrically connected to either the upper electrode plate or the lower electrode plate, and a pressing head fixed to the lower end of the lower electrode plate.

[0008] Specifically, the conductive connecting plate is electrically connected to the upper electrode plate, and a height adjustment structure is provided between the conductive connecting plate and the upper electrode plate. The height adjustment structure includes a mounting hole provided on the conductive connecting plate and extending along the z-direction, and a bolt passing through the mounting hole and connecting to the upper electrode plate.

[0009] Specifically, the first pressure plate is provided with multiple guide rods, and the first top plate is provided with guide holes for the guide rods to extend and retract along the z-direction.

[0010] Specifically, the conductive contact is an elastic annular metal contact piece.

[0011] Specifically, the pressing head includes a straight plate extending along the y-direction and curved portions connected to both ends of the straight plate along the y-direction.

[0012] The beneficial effects of this utility model are:

[0013] The high-frequency welding device of this utility model is equipped with a grounding module. The grounding module includes a conductive connecting plate connected to one side of the upper electrode plate along the x-direction, a conductive contact fixed to the lower end of the conductive connecting plate, and a grounding plate located inside the machine and electrically connected to the machine. When the upper electrode plate is pressed down, it will drive the conductive connecting plate and the conductive contact to move down, so that the conductive contact contacts contact the grounding plate. The grounding plate is electrically connected to the metal shell of the machine, and the metal shell of the machine is connected to the earth, thereby forming a good ground and avoiding leakage. Attached Figure Description

[0014] Figure 1 This is a perspective view of the medical air cushion production equipment according to an embodiment of this application;

[0015] Figure 2 This is a schematic diagram of a medical air cushion formed by folding, high-frequency welding, and cutting the membrane material on the carrier.

[0016] Figure 3 Three-dimensional representation of the high-frequency welding mechanism in this application embodiment Figure 1 ;

[0017] Figure 4 Three-dimensional representation of the high-frequency welding mechanism in this application embodiment Figure 2 ;

[0018] Figure 5 This is a bottom view of the high-frequency welding mechanism according to an embodiment of this application;

[0019] Figure 6 This is a cross-sectional view of the high-frequency welding mechanism according to an embodiment of this application.

[0020] The attached figures are labeled as follows: machine base 10, conveying mechanism 20, high-frequency welding mechanism 30, cutting mechanism 40, unloading mechanism 50, carrier 21, groove 211, positioning pin 212, pressing head 31, gripping component 51, stacking rack 52, membrane material 61, medical air cushion 62, limiting post 213, first mounting post 32, first top plate 33, second driving device 34, first pressure plate 35, upper electrode plate 36, lower electrode plate 37, power supply box 38, grounding module 70, conductive connecting plate 71, conductive contact component 72, grounding plate 73, height adjustment structure 80, mounting hole 81, bolt 82, guide rod 39, cooling buffer zone 90, straight plate 311, and bent part 312. Detailed Implementation

[0021] This utility model provides a high-frequency welding device for preventing leakage. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0023] like Figures 1 to 6 This embodiment discloses a high-frequency welding device for preventing leakage current, including a machine base 10 and a high-frequency welding mechanism 30 disposed on the machine base 10. The high-frequency welding mechanism 30 includes a first mounting column 32 fixed to the machine base 10, a first top plate 33 that can be lifted and fixed to the first mounting column 32, a second driving device 34 fixed to the first top plate 33 and capable of being driven along the z-direction, an electrode assembly connected to the output end of the second driving device 34, and a pressing head 31 fixed to the lower end of the electrode assembly. A grounding module 70 is also provided between the machine base 10 and the high-frequency welding mechanism 30. The grounding module 70 includes a conductive connecting plate 71 electrically connected to the electrode assembly, a conductive contact 72 fixed to the lower end of the conductive connecting plate 71, and a grounding plate 73 disposed inside the machine base 10 and electrically connected to the machine base 10. The conductive contact 72 can move downward along the z-direction until it abuts against the grounding plate 73.

[0024] In this embodiment of the high-frequency welding device, when the conveying mechanism 20 conveys the carrier 21 carrying the film material 61 to below the pressing head 31, the second driving device 34 first drives the pressing head 31 to descend to a certain height, so that the pressing head 31 contacts the film material 61, but does not apply pressure; then the power supply box 38 supplies power to the upper electrode plate 36 and the lower electrode plate 37. After the upper electrode plate 36 and the lower electrode plate 37 are energized, they generate high-frequency electromagnetic field energy. Under the action of the electromagnetic field, the molecules on the surface of the film material 61 will be subjected to strong vibration and friction, thereby generating heat, so that the film material 61 reaches the melting point in a short time; when the film material 61 reaches the melting point, the second driving device 34 drives the pressing head 31 to apply downward pressure, so that the film material 61 further contacts and forms a weld in the molten state, resulting in high welding efficiency.

[0025] Because the power supply box 38 outputs a high voltage, the high-frequency welding mechanism 30 is prone to leakage during the welding process. Therefore, please refer to... Figure 3 and Figure 4 The high-frequency welding device in this embodiment also includes a grounding module 70. The grounding module 70 includes a conductive connecting plate 71 connected to one side of the upper electrode plate 36 along the x direction, a conductive contact 72 fixed to the lower end of the conductive connecting plate 71, and a grounding plate 73 disposed inside the machine base 10 and electrically connected to the machine base 10. When the upper electrode plate 36 is pressed down, it will drive the conductive connecting plate 71 and the conductive contact 72 to move down, so that the conductive contact 72 contacts the grounding plate 73. The grounding plate 73 is electrically connected to the metal shell of the machine base 10, and the metal shell of the machine base 10 is connected to the earth, thereby forming a good ground and avoiding leakage.

[0026] The high-frequency welding device of this embodiment can be used in conjunction with the conveying mechanism 20, the cutting mechanism 40, and the unloading mechanism 50 to form a device such as... Figure 1 The medical air cushion production equipment shown can be used to produce medical air cushion 62. The high-frequency welding device of this embodiment can achieve efficient welding, and the welding, cutting and blanking processes are integrated into the same equipment, which can significantly improve production efficiency.

[0027] Specifically, a high-frequency welding mechanism 30, a cutting mechanism 40, and a feeding mechanism 50 are sequentially arranged above the conveying mechanism 20 along the conveying direction. After the operator fixes the membrane material 61 onto the carrier 21, the conveying mechanism 20 starts, conveying the carrier 21 containing the membrane material 61 to below the pressing head 31 of the high-frequency welding mechanism 30. The conveying mechanism 20 then stops, and the high-frequency welding mechanism 30 starts, converting electrical energy into high-frequency electromagnetic field energy. The electromagnetic field acts on the membrane material 61 to be welded. Under the action of the electromagnetic field, the molecules on the surface of the membrane material 61 will be subjected to strong vibration and friction, thereby generating heat, causing the membrane material 61 to weld for a short time. The membrane material 61 reaches its melting point within a short period of time. After the membrane material 61 reaches its melting point, the pressing head 31 of the high-frequency welding mechanism 30 will quickly apply pressure, so that the membrane material 61 can further contact and form a weld in the molten state. The conveying mechanism 20 continues to convey the carrier 21 to the position of the cutting mechanism 40. The conveying mechanism 20 stops conveying and uses the cutting mechanism 40 to cut off the edge of the membrane material 61 to obtain the medical air cushion 62. The conveying mechanism 20 continues to convey the carrier 21 to the position below the gripper 51 of the unloading mechanism 50. The conveying mechanism 20 stops conveying and uses the gripper 51 to grab the medical air cushion 62 on the carrier 21 and transfer it to the stacking rack 52.

[0028] Furthermore, this embodiment employs a high-frequency welding mechanism 30 as the welding device. A high electric field causes the molecules on the surface of the film material 61 to undergo intense vibration and friction, generating heat and allowing the film material 61 to reach its melting point in a short time, thus achieving the welding purpose. Compared to traditional hot pressing methods, high-frequency welding offers a stable output frequency. This stability ensures the reliability and consistency of the welding process, improving production efficiency. High-frequency welding is suitable for various plastic and rubber products, including soft and hard plastics such as pure PVC, TPU, and EVA, as well as artificial leather and clothing fabrics, with excellent heat-sealing and welding effects.

[0029] Furthermore, the grounding plate 73 is located inside the machine base 10, and when the conveying mechanism 20 conveys the carrier 21 with the film material 61 to the area below the pressing head 31, after the conveying mechanism 20 stops conveying, the conductive contact 72 can pass through two adjacent carriers 21 along the z direction and then abut against the grounding plate 73, which is ingenious.

[0030] For further details, please refer to... Figure 3 In this embodiment, a height adjustment structure 80 is provided between the conductive connecting plate 71 and the upper electrode plate 36. The height adjustment structure 80 includes a mounting hole 81 provided on the conductive connecting plate 71 and extending along the z direction, and a bolt 82 passing through the mounting hole 81 and connecting to the upper electrode plate 36. The initial height of the conductive contact 72 is adjusted according to the height adjustment structure 80 to adapt it to different application scenarios.

[0031] Furthermore, in order to improve the stability of the first pressure plate 35 moving along the z-direction, the first pressure plate 35 is provided with a plurality of guide rods 39, and the first top plate 33 is provided with guide holes for the guide rods 39 to extend and retract along the z-direction.

[0032] Furthermore, the conductive contact 72 is an elastic annular metal contact piece. The use of an annular metal contact piece provides better elastic recovery performance and better contact effect between the conductive contact 72 and the ground plane 73.

[0033] Furthermore, the pressing head 31 includes a straight plate 311 extending along the y-direction and curved portions 312 connected to both ends of the straight plate 311 along the y-direction. The shape of the pressing head 31 is designed according to the shape of the medical air cushion 62 to be formed. In this embodiment, it is for the case of... Figure 2 The medical air cushion 62 shown is formed by high-frequency thermoforming, therefore it adopts a structure with a straight plate 311 and two curved sections 312. The specific operation is as follows: The operator first places the membrane material 61 with a central positioning hole and edge positioning holes in the groove 211 of the carrier 21, aligning the central positioning hole with the positioning pin 212. Then, the two sides of the membrane material 61 are folded towards the center, aligning the edge positioning holes with the positioning pins 212. Through the positioning action of the positioning pins 212, the membrane material 61 maintains a stable folded state after being folded. When the carrier 21 transports the membrane material 61 to below the pressing head 31, the pressing head 31 applies downward pressure, causing the membrane material 61 to form as shown... Figure 2 The medical air cushion 62 shown has an ingenious structure.

[0034] The preferred embodiments of this utility model have been described in detail above. However, this invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this invention.

Claims

1. A high-frequency welding device for preventing leakage current, characterized in that, The machine includes a machine base (10) and a high-frequency welding mechanism (30) mounted on the machine base (10). The high-frequency welding mechanism (30) includes a first mounting column (32) fixed to the machine base (10), a first top plate (33) that is liftably fixed to the first mounting column (32), a second driving device (34) fixed to the first top plate (33) and capable of being driven along the z-direction, an electrode assembly connected to the output end of the second driving device (34), and a pressing head fixed to the lower end of the electrode assembly. (31) A grounding module (70) is also provided between the machine base (10) and the high-frequency welding mechanism (30). The grounding module (70) includes a conductive connecting plate (71) electrically connected to the electrode assembly, a conductive contact (72) fixed to the lower end of the conductive connecting plate (71), and a grounding plate (73) provided inside the machine base (10) and electrically connected to the machine base (10). The conductive contact (72) can move downward along z until it abuts against the grounding plate (73).

2. The high-frequency welding device for preventing leakage current as described in claim 1, characterized in that, The electrode assembly includes a first pressure plate (35) fixed to the output end of the second driving device (34), an upper electrode plate (36) fixed to the lower end of the first pressure plate (35), a lower electrode plate (37) fixed to the lower end of the upper electrode plate (36), and a power supply box (38) for supplying power to the upper electrode plate (36) and the lower electrode plate (37). The conductive connecting plate (71) is electrically connected to either the upper electrode plate (36) or the lower electrode plate (37). The pressing head (31) is fixed to the lower end of the lower electrode plate (37).

3. The high-frequency welding device for preventing leakage current as described in claim 2, characterized in that, The conductive connecting plate (71) is electrically connected to the upper electrode plate (36). A height adjustment structure (80) is provided between the conductive connecting plate (71) and the upper electrode plate (36). The height adjustment structure (80) includes a mounting hole (81) provided on the conductive connecting plate (71) and extending along the z-direction, and a bolt (82) passing through the mounting hole (81) and connecting to the upper electrode plate (36).

4. The high-frequency welding device for preventing leakage current as described in claim 2, characterized in that, The first pressure plate (35) is provided with a plurality of guide rods (39), and the first top plate (33) is provided with guide holes for the guide rods (39) to extend and retract along the z-direction.

5. The high-frequency welding device for preventing leakage current according to claim 1, characterized in that, The conductive contact (72) is an elastic annular metal contact piece.

6. The high-frequency welding device for preventing leakage current according to claim 1, characterized in that, The pressing head (31) includes a straight plate (311) extending in the y direction and a curved portion (312) connected to both ends of the straight plate (311) in the y direction.

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