Sealing mechanism for plastic bag
By designing a plastic bag sealing mechanism including driving cylinder, electromagnet and magnetic suction sheet, the problem of plastic bag displacement wrinkles during the sealing process is solved, and a more stable and efficient sealing effect is achieved.
Patent Information
- Application Number
- CN202421543095.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The existing plastic bag sealing mechanism can easily cause the plastic bag to displace and wrinkle during the sealing process, affecting the sealing quality and packaging effect. The clamping part is complex in structure, cumbersome in operation, and the scope of application is limited.
A sealing mechanism including a support frame, a drive cylinder, a controller, a guide column, a mounting plate, a sealing mount, a heating strip, a pressing plate, a pressing strip, a mounting bracket, a magnetic suction piece, a connecting bracket, an electromagnetic iron and a buffer spring are designed. By driving the cylinder to drive the pressing plate to lift and lower, the contact between the pressure strip and the heating strip is controlled to achieve rapid and stable sealing of the plastic bag. The combination of the electromagnet and the magnetic suction piece can fix the plastic bag through magnetic suction to reduce displacement.
The stability and accuracy of the sealing process are achieved, the displacement wrinkle phenomenon of plastic bags is reduced, the sealing quality and effect is improved, the operation process is simplified, and the scope of application is wider.
Smart Images
Figure CN222728405U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of sealing mechanisms, in particular to a sealing mechanism for a plastic bag. Background Art
[0002] As a lightweight and durable packaging material, plastic bags are widely used in many industries such as food, medicine, chemicals, and agricultural products. Their portability and sealing properties make plastic bags an ideal packaging choice. Heat sealers or sealing mechanisms installed on production lines are usually used in the production and packaging of plastic bags. As a key component of plastic bag packaging, the performance of the sealing mechanism is directly related to the quality and effect of the plastic bag sealing packaging.
[0003] Sealing mechanism is widely used in various plastic bag sealing operations. Existing plastic bag sealing mechanism usually consists of a frame, a heating and cooling mechanism, a sealing and printing mechanism, and a control system. Its basic working principle is to heat the sealing belt through an electric heating element to melt the plastic film of the sealing part, and then press or roll the plastic film of the sealing part to bond, thereby completing the sealing operation.
[0004] However, the existing sealing mechanism is usually provided with a clamping part to fix the sealing end of the plastic bag on the sealing mechanism to prevent the plastic bag from moving or deforming during the sealing process. However, the existing clamping part is generally the pressing of a pressure plate or the rolling of a roller. During the sealing process, there is a phenomenon that the plastic bag is easily displaced and wrinkled, which affects the sealing quality, thereby affecting the sealing quality and sealing packaging effect of the plastic bag. In addition, the structural design of the clamping part in the existing sealing mechanism is relatively complex, and its operation process is relatively cumbersome. The application scope of the sealing mechanism is limited and it is not easy to apply the sealing effect of plastic bags of different widths. Utility Model Content
[0005] The purpose of the utility model is to solve the above defects and provide a sealing mechanism for a plastic bag to solve the technical problem that the sealing part of the sealing mechanism in the above background technology is prone to displacement and wrinkles during the sealing process, thereby affecting the sealing quality and sealing packaging effect.
[0006] The purpose of the utility model is achieved by the following methods:
[0007] A sealing mechanism for a plastic bag comprises a support frame and a driving cylinder arranged on the support frame, a controller is connected to the side of the support frame, a guide column is connected to the support frame, a mounting plate is connected to the middle of the guide column, a sealing mounting seat is connected to the mounting plate, a heating strip is provided on the sealing mounting seat, a pressing plate is connected to the guide column through a shaft sleeve, a pressure strip is connected to the pressing plate, a telescopic end of the driving cylinder passes through the support frame and is connected to the pressing plate, a mounting bracket is connected to the side of the mounting plate, a magnetic suction sheet is bonded to the upper surface of the mounting bracket, a connecting bracket is connected to the side of the pressing plate close to the mounting bracket, a connecting column is connected to the connecting bracket through a mounting sleeve, a buffer spring is sleeved on the connecting column, and an electromagnet is connected to one end of the connecting column, and the electromagnet and the magnetic suction block are relatively distributed.
[0008] Further in the above description, the mounting plate is installed on the guide column through a connecting seat, and a limit spring is sleeved on the guide column. One end of the limit spring abuts against the mounting plate, and the other end of the limit spring abuts against the pressing plate. The limit spring is arranged to buffer the contact between the pressing plate and the mounting plate, thereby preventing the pressing plate and the mounting plate from colliding.
[0009] Further in the above description, the pressure strip is installed on the pressing plate through a pressure seat, and the pressing plate is connected to the pressure seat through screws. The pressure strip on the pressure seat is located above the heating strip. The pressure strip can be driven by the driving cylinder to move along the guide column toward the heating strip on the mounting plate. The driving cylinder can drive the pressure strip on the pressing plate to contact the heating strip, so that the film of the sealing part of the plastic belt is melted by the heat, and the plastic film of the sealing part is bonded, thereby completing the sealing operation.
[0010] Further in the above description, a threaded hole is provided on the side of the mounting plate, and a mounting groove is provided on the side of the mounting bracket. The mounting groove is connected to the threaded hole by bolts, and the mounting groove can adjust the installation height relative to the heating strip according to the requirements of the mounting bracket.
[0011] Further in the above description, the side of the connecting bracket can be adjustably installed on the side of the pressing plate through a connecting groove, and the connecting bracket can move along the connecting column through the mounting sleeve to form compression. Under the drive of the driving cylinder, after the pressure strip contacts the heating strip, the electromagnet on the connecting bracket can slide along the mounting sleeve on the connecting column, and under the limiting buffering effect of the buffer spring, the stability and reliability of the magnetic attraction between the electromagnet and the magnetic attraction sheet can be improved, and the displacement and wrinkles of the compressed part of the plastic bag can be reduced.
[0012] Further in the above description, a wire is provided on the side of the electromagnet, and the wire of the electromagnet is electrically connected to the controller. The electromagnet is composed of a shell and a coil, an iron core and an armature arranged in the shell. The control module of the controller can control the current to pass through the coil, which will generate a magnetic field to attract the armature to the iron core, thereby producing an attraction effect with the magnetic suction plate, so that the plastic bag between the electromagnet and the magnetic suction plate can be magnetically fixed. When the power supply of the electromagnet is disconnected, the magnetic field in the coil disappears, and the armature will be separated from the iron core, thereby separating the electromagnet from the magnetic suction plate. Due to the insulation of the plastic bag, it is not easy to move with the electromagnet.
[0013] The beneficial effects of the utility model are as follows: the telescopic end of the driving cylinder can drive the pressing plate to move up and down along the guide column, thereby controlling the distance between the pressing strip and the heating strip. The sealing mounting seat is provided with a heating strip to quickly heat the surface of the plastic bag, so that it melts and bonds together, and the port of the plastic bag can be quickly pressed and sealed, ensuring the stability and accuracy of the sealing process, making the sealing process more uniform and the sealing quality more reliable. The design of the magnetic suction sheet bonded to the mounting bracket and the electromagnet connected to the pressing plate, when the pressing plate moves toward the sealing mounting seat, the electromagnet on the connecting bracket is driven by the pressing plate to move toward the magnetic suction sheet, and the controller controls the electromagnet to be energized to generate a magnetic suction effect and attract each other with the magnetic suction sheet, so that when the port of the plastic bag is placed on the mounting bracket, the electromagnet and the magnetic suction sheet can magnetically press the plastic bag, and at the same time, the buffer spring sleeved on the connecting column can further reduce the impact and vibration of the electromagnet during the pressing movement of the pressing plate and the sealing mounting seat, thereby improving the stability and durability of the pressing, reducing the displacement and wrinkling of the plastic bag, and improving the sealing quality and effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a three-dimensional diagram of this embodiment;
[0015] Figure 2 Schematic diagram of the connection structure of the electromagnet in this embodiment;
[0016] Figure 3 This is a schematic diagram of the connection structure of the mounting bracket in this embodiment;
[0017] Figure 4 It is the front view of this embodiment;
[0018] Figure 5 is a cross-sectional view of this embodiment;
[0019] The reference numerals in the figure are: 1-support frame, 2-driving cylinder, 3-controller, 4-guide column, 5-mounting plate, 6-sealing mounting seat, 7-heating strip, 8-shaft sleeve, 9-pressing plate, 10-pressing strip, 11-mounting bracket, 12-magnetic suction sheet, 13-connecting bracket, 14-mounting sleeve, 15-connecting column, 16-buffer spring, 17-electromagnet, 18-connecting seat, 19-limiting spring, 20-pressing seat, 21-mounting groove, 22-connecting groove, 23-wire. DETAILED DESCRIPTION
[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0021] In this embodiment, refer to Figure 1-Figure 5 A sealing mechanism for a plastic bag is specifically implemented, comprising a support frame 1 and a driving cylinder 2 arranged on the support frame 1, a controller 3 is connected to the side of the support frame 1, a guide column 4 is connected to the support frame 1, a mounting plate 5 is connected to the middle of the guide column 4, a sealing mounting seat 6 is connected to the mounting plate 5, a heating strip 7 is provided on the sealing mounting seat 6, a pressing plate 9 is connected to the guide column 4 through a shaft sleeve 8, a pressure strip 10 is connected to the pressing plate 9, the telescopic end of the driving cylinder 2 passes through the support frame 1 and is connected to the pressing plate 9, a mounting bracket 11 is connected to the side of the mounting plate 5, a magnetic suction sheet 12 is bonded to the upper surface of the mounting bracket 11, a connecting bracket 13 is connected to the side of the pressing plate 9 close to the mounting bracket 11, a connecting column 15 is connected to the connecting bracket 13 through a mounting sleeve 14, a buffer spring 16 is sleeved on the connecting column 15, and an electromagnet 17 is connected to one end of the connecting column 15, and the electromagnet 17 is distributed relatively to the magnetic suction block.
[0022] In this embodiment, the mounting plate 5 is installed on the guide column 4 through the connecting seat 18, and a limiting spring 19 is sleeved on the guide column 4. One end of the limiting spring 19 abuts against the mounting plate 5, and the other end of the limiting spring 19 abuts against the pressing plate 9. The setting of the limiting spring 19 buffers the contact between the pressing plate 9 and the mounting plate 5 to prevent the pressing plate 9 from colliding with the mounting plate 5.
[0023] In this embodiment, the pressure strip 10 is installed on the pressing plate 9 through the pressure seat 20. The pressing plate 9 is connected to the pressure seat 20 by screws. The pressure strip 10 on the pressure seat 20 is located above the heating strip 7. The pressing plate 9 is driven by the driving cylinder 2 to drive the pressure strip 10 along the guide column 4 to move toward the heating strip 7 on the mounting plate 5. The driving cylinder 2 can drive the pressure strip 10 on the pressing plate 9 to contact the heating strip 7, so that the film of the sealing part of the plastic belt is melted by heat, and the plastic film of the sealing part is bonded, thereby completing the sealing operation.
[0024] In this embodiment, a threaded hole is opened on the side of the mounting plate, and a mounting groove 21 is opened on the side of the mounting bracket 11. The mounting groove 21 is connected to the threaded hole by bolts. The mounting groove 21 can adjust the installation height relative to the heating strip 7 according to the requirements of the mounting bracket 11.
[0025] In this embodiment, the side of the connecting bracket 13 is adjustably installed on the side of the pressing plate 9 through the connecting groove 22. The connecting bracket 13 can move along the connecting column 15 through the mounting sleeve 14 to form compression. Under the drive of the driving cylinder 2, after the pressure strip 10 contacts the heating strip 7, the electromagnet 17 on the connecting bracket 13 can slide along the mounting sleeve 14 on the connecting column 15, and under the limiting buffering effect of the buffer spring 16, the stability and reliability of the magnetic attraction between the electromagnet 17 and the magnetic attraction sheet 12 are improved, and the displacement wrinkles of the compressed part of the plastic bag are reduced.
[0026] In this embodiment, a wire 23 is provided on the side of the electromagnet 17, and the wire 23 of the electromagnet 17 is electrically connected to the controller 3. The electromagnet 17 is composed of a shell and a coil, an iron core and an armature arranged in the shell. The control module of the controller 3 can control the current to pass through the coil, which will generate a magnetic field to attract the armature to the iron core, thereby producing an attraction effect with the magnetic suction plate 12, so that the plastic bag between the electromagnet 17 and the magnetic suction plate 12 can be magnetically fixed. When the power supply of the electromagnet 17 is disconnected, the magnetic field in the coil disappears, and the armature will be separated from the iron core, thereby separating the electromagnet 17 from the magnetic suction plate 12. Due to the insulation of the plastic bag, it is not easy for it to move with the electromagnet 17.
[0027] The specific use principle of this embodiment is: the end of the plastic bag to be sealed is placed between the heating strip 7 and the pressure strip 10, and the port of the plastic bag extends toward the magnetic sheet 12 on the upper surface of the mounting bracket 11, so that it is located between the magnetic sheet 12 and the electromagnet 17. The controller 3 controls the telescopic end of the driving cylinder 2 to drive the pressing plate 9 to move up and down along the guide column 4. The pressure strip 10 and the heating strip 7 press the plastic bag tightly, so that the heating strip 7 on the sealing mounting seat 6 quickly heats the surface of the plastic bag, so that the sealing end of the plastic bag melts and sticks together, and the plastic bag can be quickly pressed and sealed. When the pressing plate 9 moves toward the sealing mounting seat 6 moves, the electromagnet 17 on the connecting bracket 13 is driven by the pressing plate 9 to move toward the magnetic sheet 12, and the controller 3 controls the electromagnet 17 to be energized to generate a magnetic effect and attract each other with the magnetic sheet 12, so that when the port of the plastic bag is placed on the mounting bracket 11, the electromagnet 17 and the magnetic sheet 12 can magnetically press the plastic bag. At the same time, the buffer spring 16 sleeved on the connecting column 15 can further reduce the impact and vibration of the electromagnet 17 during the pressing movement of the pressing plate 9 to the sealing mounting seat 6, thereby improving the stability and durability of the pressing, reducing the displacement and wrinkling of the plastic bag, and improving the sealing quality and effect.
[0028] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.
Claims
1. A sealing mechanism for a plastic bag, comprising a support frame and a driving cylinder arranged on the support frame, wherein a controller is connected to the side of the support frame, and characterized in that: The support frame is connected to a guide column, a mounting plate is connected to the middle of the guide column, a sealing mounting seat is connected to the mounting plate, a heating strip is provided on the sealing mounting seat, a pressing plate is connected to the guide column through a shaft sleeve, a pressing strip is connected to the pressing plate, the telescopic end of the driving cylinder passes through the support frame and is connected to the pressing plate, a mounting bracket is connected to the side of the mounting plate, a magnetic sheet is bonded to the upper surface of the mounting bracket, a connecting bracket is connected to the side of the pressing plate close to the mounting bracket, a connecting column is connected to the connecting bracket through a mounting sleeve, a buffer spring is sleeved on the connecting column, and an electromagnet is connected to one end of the connecting column, and the electromagnet and the magnetic block are relatively distributed.
2. A sealing mechanism for a plastic bag according to claim 1, characterized in that: The mounting plate is mounted on the guide column through a connecting seat, a limit spring is sleeved on the guide column, one end of the limit spring abuts against the mounting plate, and the other end of the limit spring abuts against the pressing plate.
3. A sealing mechanism for a plastic bag according to claim 1, characterized in that: The pressure strip is installed on the pressing plate through a pressing seat, and the pressing plate is connected to the pressing seat through screws. The pressure strip on the pressing seat is located above the heating strip. The pressing plate drives the pressure strip to move along the guide column toward the heating strip on the mounting plate under the drive of the driving cylinder.
4. A sealing mechanism for a plastic bag according to claim 1, characterized in that: A threaded hole is provided on the side of the mounting plate, and a mounting groove is provided on the side of the mounting bracket. The mounting groove is connected to the threaded hole through a bolt.
5. A sealing mechanism for a plastic bag according to claim 1, characterized in that: The side surface of the connecting bracket is adjustably mounted on the side surface of the pressing plate through the connecting groove, and the connecting bracket can move along the connecting column to form compression through the mounting sleeve.
6. A sealing mechanism for a plastic bag according to claim 1, characterized in that: A conductive wire is provided on the side of the electromagnet, and the conductive wire of the electromagnet is electrically connected to the controller.