Plastic bag hot melting machine

Abstract

The utility model relates to the technical field of plastic bag production equipment, especially to a plastic bag hot melting machine, including frame, support frame, auxiliary heat dissipation subassembly, support and sliding block. The frame sets up the guide roller group and the rectification mechanism, support frame sets up on the frame, and two guide rollers D are symmetrically set up on the support frame, and the welding seat is set up between two guide rollers D on the support frame, and the top end height of the welding seat is lower than the top end height of guide roller D, auxiliary heat dissipation subassembly sets up on the frame and is connected with support frame, and auxiliary heat dissipation mechanism is in the working condition and is to support frame and welding seat auxiliary heat dissipation, and the support sets up the hot melting subassembly of adapting with the welding seat, and the sliding block includes two and is located between the guide roller group and the support frame, and two sliding blocks are all set up on the frame and are along its height direction and are slidably connected with it, and the guide roller E of rotating connection is set up between two sliding blocks and is rotatedly connected with it. The utility model can stably convey the tubular film, and the hot melting efficiency is high, and the plastic bag yield is high.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic bag production equipment, and in particular to a plastic bag hot melt machine. Background Technology

[0002] Plastic bags are very common in daily life, among which tubular plastic bags are the most common. Tubular plastic bags are made by blowing a tubular film out of a blow molding machine and then using a hot melt machine to heat melt the tubular film at a fixed distance to form a series of packaging bags.

[0003] Whether using electric heating or ultrasonic heat melting, the welding station will generate high temperatures during continuous operation. Existing plastic bag heat melting machines lack a structure that can effectively separate the welding station from the tubular film. Relying solely on natural cooling cannot prevent the high temperature of the welding station from adversely affecting the packaging film during the transportation process. Based on this, technicians can only avoid the above situation by reducing the winding speed of the tubular film and the heat melting speed. This results in generally low efficiency in the processing of finished plastic bags, thus requiring improvement. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a plastic bag hot melt machine.

[0005] The technical solution of this utility model is: a plastic bag hot melt machine, including a frame, on which a guide roller group and a correction mechanism are arranged; The support frame is set on the machine frame and located at the discharge end of the guide roller group near the machine frame. Two guide rollers D are symmetrically arranged on the support frame and rotatably connected to it. A welding seat is set on the support frame between the two guide rollers D. The top height of the welding seat is lower than the top height of the guide roller D. Auxiliary heat dissipation component, which is mounted on the frame and connected to the support frame, provides auxiliary heat dissipation to the support frame and solder pad during operation; A bracket, on which a heat-melting component adapted to the welding socket is mounted; And sliders, including two sliders located between the guide roller group and the support frame, both sliders are mounted on the frame and slidably connected to it along its height direction, and a guide roller E is provided between the two sliders and rotatably connected to it.

[0006] Preferably, the guide roller assembly includes guide roller B and guide roller C, both of which are rotatably connected to the frame. The correction mechanism is located between guide roller B and guide roller C, and guide roller E is located between guide roller C and the correction mechanism.

[0007] Preferably, a guide frame is provided on the frame between the guide roller C and the support frame. Two slide blocks are slidably arranged on the guide frame. A grating for measuring the edge position of the plastic bag is provided on the slide blocks. Two linear modules are provided on the guide frame. The two linear modules drive and connect to the slide blocks on the corresponding sides respectively.

[0008] Preferably, the correction mechanism includes a correction bracket, a guide roller A, a friction roller, and a servo motor. A mounting plate parallel to the bottom surface of the frame is provided on the frame. The correction bracket is rotatably mounted on the mounting plate. The guide roller A and the friction roller are rotatably mounted at both ends of the correction bracket and are parallel to each other. The body of the servo motor is mounted on the mounting plate, and the output end of the servo motor is connected to the central shaft of the correction bracket through a coupling.

[0009] Preferably, the auxiliary heat dissipation component includes a fan, a shroud is provided on each side of the frame, a filter screen is provided on one of the shrouds, the fan is provided on the other shroud and draws air from the shroud, and a duct is provided through the support frame, with the two ends of the duct inserted into the shrouds on the corresponding sides.

[0010] Preferably, the ultrasonic hot-melt assembly includes a support and a welding head for hot-melting plastic bags. The support is mounted on a frame and has a guide rod that slides along its height direction. The guide rod is connected to the welding head, which is located directly above the welding seat. The support is also equipped with a drive assembly for driving the welding head to rise or fall.

[0011] Preferably, a ranging component for monitoring the conveying distance of the tubular membrane is provided on the support.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects: By setting up a grating and a correction mechanism, the edge position of the tubular film can be easily monitored and measured through the grating. When the tubular film deviates, it can be corrected in time to prevent the hot-melt welding point from tilting or the hot-melt process from being incomplete. By setting up a guide roller group and a freely lifting guide roller E, when hot-melting, the two ends of the tubular film pull the guide roller E to make it rise adaptively, which facilitates the hot-melt of the tubular film into a bag. In the non-hot-melt state, the guide roller E is in a lower position due to its own weight and pulls the tubular film between the two guide rollers D to restore it to flatness and detach it from the welding seat. This avoids the high temperature of the welding seat directly acting on the tubular film in the conveying state. At the same time, this utility model uses ultrasonic hot-melt technology to complete the hot-melt processing of plastic bags, which has high efficiency and yield. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the connection structure of the various components on the frame; Figure 3 This is a schematic diagram of the connection structure of the various components on the support frame; Figure 4 This is a schematic diagram of the connection structure of the various components on the support frame.

[0014] Reference numerals: 1. Frame; 2. Correction bracket; 3. Guide roller A; 4. Friction roller; 5. Servo motor; 6. Guide roller B; 7. Guide roller C; 8. Support frame; 9. Guide roller D; 10. Welding base; 11. Conduit; 12. Flow guide; 121. Filter screen; 122. Fan; 13. Bracket; 14. Ultrasonic control box; 15. Guide rod; 16. Amplifier; 17. Transducer; 18. Welding head; 19. Servo electric cylinder; 20. Distance sensor; 21. Guide frame; 22. Slide block; 23. Grating; 24. Linear module; 25. Slider; 26. Guide roller E. Detailed Implementation

[0015] Example 1 like Figures 1-4As shown, this utility model proposes a plastic bag hot melt machine, including a frame 1, a support frame 8, an auxiliary heat dissipation assembly, a bracket 13, and a slider 25. A guide roller group and a correction mechanism are mounted on the frame 1. The guide roller group includes guide roller B6 and guide roller C7, both of which are rotatably connected to the frame 1. The correction mechanism is located between guide roller B6 and guide roller C7. The correction mechanism includes a correction bracket 2, guide roller A3, friction roller 4, and a servo motor 5. A mounting plate parallel to the bottom surface of the frame 1 is mounted on it. The correction bracket 2 is rotatably mounted on the mounting plate. Guide roller A3 and friction roller 4 are rotatably mounted at both ends of the correction bracket 2 and are parallel to each other. The body of the servo motor 5 is mounted on the mounting plate, and the output end of the servo motor 5 is connected to the central shaft of the correction bracket 2 via a coupling. A support frame 8 is mounted on the frame 1 and located near the discharge end of the guide roller assembly close to the frame 1. Two guide rollers D9 are symmetrically mounted on the support frame 8 and rotatably connected to it. A welding seat 10 is mounted on the support frame 8 between the two guide rollers D9, with the top of the welding seat 10 being lower than the top of the guide rollers D9. A guide frame 21 is mounted on the frame 1 between the guide roller C7 and the support frame 8. Two slide blocks 22 are slidably mounted on the guide frame 21. A grating 23 for measuring the edge position of the plastic bag is mounted on the slide block 22, and two linear modules 24 are mounted on the guide frame 21, each driving and connecting to the corresponding slide block 22. The auxiliary heat dissipation component includes a fan 122. A guide shroud 12 is provided on each side of the frame 1. A filter screen 121 is provided on one of the guide shrouds 12. The fan 122 is provided on the other guide shroud 12 and draws air from the guide shroud 12. A duct 11 is provided through the support frame 8. The two ends of the duct 11 are respectively inserted into the guide shroud 12 on the corresponding side. The auxiliary heat dissipation mechanism provides auxiliary heat dissipation for the support frame 8 and the welding base 10 in the working state. A heat-melting assembly adapted to the welding base 10 is mounted on the support 13. The heat-melting assembly includes the support 13 and a welding head 18 for heat-melting plastic bags. The welding head 18 may be, but is not limited to, an electric welding head. The support 13 is mounted on the frame 1. A guide rod 15 that slides along the height direction is mounted on the support 13. The guide rod 15 is connected to the welding head 18, which is located directly above the welding base 10. A drive assembly for driving the welding head 18 to rise or fall is mounted on the support 13. The drive assembly includes, but is not limited to, a servo electric cylinder 19. The body of the servo electric cylinder 19 is mounted on the support 13, and the output end of the servo electric cylinder 19 is connected to the housing of the transducer 17. A ranging assembly for monitoring the conveying distance of the cylindrical membrane is mounted on the support. The ranging assembly includes, but is not limited to, a ranging sensor 20, which is a TOF type ranging sensor. Two sliders 25 are located between the guide roller group and the support frame 8. Both sliders 25 are mounted on the frame 1 and are slidably connected to it along its height direction. A guide roller E26 is provided between the two sliders 25 and is rotatably connected to it. The guide roller E26 is located between the guide roller C7 and the correction mechanism.

[0016] It is important to note that this technical solution also includes a control panel, which uses a combination of HMI (Human Machine Interface) and PLC (Programmable Logic Controller). The servo motor 5, servo electric cylinder 19, distance sensor 20, and grating 23 are all electrically connected to the PLC controller. The HMI provides users with an intuitive and user-friendly interface, allowing for easy issuance of various commands via touchscreen. Additionally, the guide rod 15 has serrations flush with the bottom surface of the welding head 18 to create a serrated, easily tearable opening near the hot-melt interface of the cylindrical film. During actual processing, the weight of the guide roller E26 needs to be adjusted to ensure it slides upwards or downwards during operation. Specifically, in the non-hot-melt state, the slider 25 should be positioned in the middle of its sliding trajectory (as long as it is not at the end).

[0017] In this embodiment, the tubular film is wound from the feed end of the frame 1 from below the guide roller B6 to above the guide roller A3 and friction roller 4, then guided around below the guide roller E26 and above the guide roller C7 and guide roller D. Finally, the end of the tubular film is fixed on the winding device. The heat-melting gap is set, and the two linear modules 24 are started. The linear modules 24 slide on the corresponding sides of the slide block 22 until the two gratings can just detect the two edge positions of the tubular film. Then the winding device is started, and the tubular film is pulled. When the set heat-melting gap is reached, the servo electric cylinder 19 presses down the welding head 18 so that it cooperates with the welding seat 10 to heat-melt the tubular film at a fixed point. Then the welding head 18 rises rapidly. At this time, the tubular film returns to a taut state under the heavy pressure of the adaptively descending guide roller E26. Subsequently, the tubular film is directly separated from the welding seat 10 and the welding head 18, and its high temperature will not have an adverse effect on the tubular film. During the hot-melting process, the fan 122 continues to run. Under negative pressure, the outside air is filtered through the filter screen 121 and enters the duct 11. After exchanging heat with the support frame 8 and the welding seat 10, the air is discharged by the fan 122. This structure allows the support frame 8 to cool down quickly, thereby avoiding the adverse effects of residual heat on the subsequent hot-melting of the cylindrical membrane.

[0018] Example 2 like Figure 1 and Figure 4As shown, the plastic bag hot melt machine proposed in this utility model, compared with the first embodiment, the hot melt component in this embodiment includes an ultrasonic control box 14, an amplitude transformer 16 and a transducer 17. The ultrasonic control box 14 is mounted on the bracket 13, and the amplitude transformer 16 and the transducer 17 are both mounted on the guide rod 15. Connect the power cord of the ultrasonic control box 14 to a 220V power supply. After starting, do not connect the transducer 17 yet, and confirm that the box is operating normally. Connect the ultrasonic control box 14 to the transducer 17 through the output line (usually a three-pin plug), paying attention to interface matching (e.g., "+" connects to the positive terminal, and "-" connects to the negative terminal). The transducer 17 is fixed to the amplitude transformer 16 (amplifier) ​​by threads or flanges. Ensure that the mating surfaces of the two are clean and apply coupling agent (e.g., wipe with alcohol or gasoline and then apply a thin layer). The amplitude transformer 16, as a mechanical transformer, needs to maintain resonance with the transducer 17. The fixing point is located at the axial movement node to reduce energy loss. The welding head 18 is connected to the amplitude transformer 16 by screws. Before installation, the plane of the welding head 18 needs to be calibrated with a level to ensure that it is parallel to the contact surface of the workpiece.

[0019] In this embodiment, an ultrasonic hot melt machine is used to heat melt the cylindrical membrane. Compared with the traditional electrothermal welding method, it is more efficient and consumes less energy. At the same time, no burnt smell is produced during the hot melt process.

[0020] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A plastic bag hot melt machine, characterized in that, include: The frame (1) is equipped with a guide roller group and a correction mechanism; Support frame (8) is set on frame (1) and located at the discharge end of guide roller group near frame (1). Two guide rollers D (9) are symmetrically arranged on support frame (8) and rotatably connected to it. Welding seat (10) is set on support frame (8) between the two guide rollers D (9). The top height of welding seat (10) is lower than the top height of guide roller D (9). An auxiliary heat dissipation component is installed on the frame (1) and connected to the support frame (8). The auxiliary heat dissipation mechanism provides auxiliary heat dissipation to the support frame (8) and the welding base (10) in the working state. A bracket (13) is provided on the bracket (13) with a hot melt assembly adapted to the welding base (10); And sliders (25), including two sliders (25) and located between the guide roller group and the support frame (8). Both sliders (25) are set on the frame (1) and slidably connected to it along its height direction. A guide roller E (26) is provided between the two sliders (25) and rotatably connected to it.

2. The plastic bag hot melt machine according to claim 1, characterized in that, The guide roller group includes guide roller B (6) and guide roller C (7). Both guide roller B (6) and guide roller C (7) are rotatably connected to the frame (1). The correction mechanism is located between guide roller B (6) and guide roller C (7), and guide roller E (26) is located between guide roller C (7) and correction mechanism.

3. A plastic bag hot melt machine according to claim 2, characterized in that, A guide frame (21) is set on the frame (1) between the guide roller C (7) and the support frame (8). Two slide blocks (22) are slidably set on the guide frame (21). A grating (23) for measuring the edge position of the plastic bag is set on the slide block (22). Two linear modules (24) are set on the guide frame (21). The two linear modules (24) drive the slide blocks (22) on the corresponding side respectively.

4. A plastic bag hot melt machine according to claim 1, characterized in that, The correction mechanism includes a correction bracket (2), a guide roller A (3), a friction roller (4), and a servo motor (5). A mounting plate parallel to the bottom surface of the frame (1) is provided on the frame (1). The correction bracket (2) is rotatably mounted on the mounting plate. The guide roller A (3) and the friction roller (4) are rotatably mounted at both ends of the correction bracket (2) and are parallel to each other. The body of the servo motor (5) is mounted on the mounting plate. The output end of the servo motor (5) is connected to the central shaft of the correction bracket (2) through a coupling.

5. A plastic bag hot melt machine according to claim 1, characterized in that, The auxiliary heat dissipation components include a fan (122), a flow guide (12) is provided on each side of the frame (1), a filter screen (121) is provided on one of the flow guides (12), the fan (122) is provided on the other flow guide (12) and draws air from the flow guide (12), and a duct (11) is provided through the support frame (8), with the two ends of the duct (11) inserted into the flow guide (12) on the corresponding side.

6. A plastic bag hot melt machine according to claim 1, characterized in that, The hot melt assembly includes a bracket (13) and a welding head (18) for hot melting plastic bags. The bracket (13) is mounted on the frame (1). A guide rod (15) is mounted on the bracket (13) and slides along its height direction. The guide rod (15) is connected to the welding head (18). The welding head (18) is located directly above the welding seat (10). A drive assembly is mounted on the bracket (13) to drive the welding head (18) to rise or fall.

7. A plastic bag hot melt machine according to claim 1, characterized in that, A ranging component for monitoring the conveying distance of the tubular membrane is installed on the support (13).

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