A sealing device for plastic bag production

Abstract

The utility model discloses a sealing device for plastic bag production, comprising a workbench, wherein both sides of the workbench are fixedly connected with a first fixed seat, the upper surface of the first fixed seat is fixedly connected with a first hydraulic device, the top of the first hydraulic device is fixedly connected with a movable seat, the outer surface of the movable seat is slidably connected with the workbench, the outer surface of the movable seat is fixedly connected with a fixed plate, the lower surface of the fixed plate is fixedly connected with a spring, the end of the spring away from the fixed plate is fixedly connected with a limit plate, and the lower surface of the limit plate is movably connected with the workbench. The utility model arranges an extrusion plate on the surface of the plastic bag, and the extrusion plate can follow the movable seat and the first sliding block, and move when it is close to the surface of the plastic bag, so that the plastic bag can be pressed flat and the air inside can be discharged at the same time, so as to avoid wrinkles when sealing, affect the sealing effect of the plastic bag, and improve the sealing quality.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic bag production, in particular to a sealing device used for plastic bag production. Background Art

[0002] Plastic bags are bags made of plastic (commonly used plastics include polypropylene, polyester, nylon, etc.) as the main raw material. They are indispensable items in people's daily lives. They can be used for product packaging, holding items, or as garbage bags, etc. In the process of making plastic bags, a sealing machine is usually required to seal the corners of the plastic bags to achieve a sealing effect.

[0003] A plastic bag sealing and heating device disclosed in the Chinese utility model patent application disclosure CN217706558U, since the utility model adopts a body connecting frame, a fixed connecting plate is arranged in front of the body connecting frame, and both ends of the fixed connecting plate are respectively connected to the body connecting frame through sliding shafts, and the sliding connecting plate is slidably connected to the sliding shaft through a sliding guide sleeve; a sealing cylinder is arranged between the sliding connecting plate and the body connecting frame, and the cylinder body of the sealing cylinder is fixedly connected to the body connecting frame, and the telescopic end of the sealing cylinder is hinged to the rear side of the sliding connecting plate through a sliding plate hinged ear plate; the upper and lower ends of the sliding connecting plate are hinged to the sliding connecting plate. A movable sealing block is arranged on the front side of the fixed connecting plate, a fixed sealing block is arranged on the fixed connecting plate and on the rear side facing the sliding connecting plate, and a sealing cutting mechanism is arranged on the fixed sealing block. Therefore, the design is reasonable and the structure is compact. The replacement of the heating tube is convenient, and the repositioning and calibration of the sealing block can be effectively avoided. The operation efficiency is high, the sealing stability is good, the sealing speed is fast, and the incision is beautiful. However, the existing plastic bag sealing device has a relatively simple structure and lacks a flattening device for the plastic bag. Because the material of the plastic bag is very thin, wrinkles are easily generated during sealing, thereby affecting the sealing quality of the plastic bag. Utility Model Content

[0004] The purpose of the utility model is to provide a sealing device for plastic bag production to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a sealing device for plastic bag production, comprising:

[0006] A workbench, wherein first fixed seats are fixedly connected to both sides of the workbench, a first hydraulic device is fixedly connected to the upper surface of the first fixed seat, a movable seat is fixedly connected to the top of the first hydraulic device, and an outer surface of the movable seat is slidably connected to the workbench;

[0007] The outer surface of the movable seat is fixedly connected to a fixed plate, the lower surface of the fixed plate is fixedly connected to a spring, one end of the spring away from the fixed plate is fixedly connected to a limiting plate, the lower surface of the limiting plate is movably connected to the workbench, the outer surface of the movable seat is provided with a first sliding groove, the interior of the first sliding groove is fixedly connected to a first motor, the output end of the first motor is fixedly connected to a first lead screw, the outer surface of the first lead screw is threadedly connected to a first sliding block, the outer surface of the first sliding block is slidably connected to the movable seat, the side surface of the first sliding block is fixedly connected to an extrusion plate, and the outer surface of the extrusion plate is slidably connected to the first sliding groove;

[0008] The lower surface of the extrusion plate is slidably connected to the workbench, the upper surface of the extrusion plate is fixedly connected to a second fixing seat, the lower surface of the second fixing seat is provided with a second hydraulic device, and the bottom end of the second hydraulic device is provided with a hot melt block.

[0009] Preferably, a second sliding groove is provided on the outer surface of the extrusion plate.

[0010] Preferably, a second motor is fixedly connected inside the second sliding groove.

[0011] Preferably, the output end of the second motor is fixedly connected to a second lead screw, and the second motor can drive the second lead screw to rotate.

[0012] Preferably, the outer surface of the second lead screw is threadedly connected to a second sliding block, and the rotation of the second lead screw can drive the second sliding block to move back and forth.

[0013] Preferably, the outer surface of the second sliding block is slidably connected to the second sliding groove, and the second sliding groove can limit the second sliding block so that the second sliding block cannot rotate but can only move in parallel, and a cooling block is provided on the lower surface of the second sliding block.

[0014] Preferably, the outer surface of the cooling block is slidably connected to the second sliding groove, and the cooling block moves left and right following the second sliding block, so that the sealing part of the plastic bag can be cooled down so that the sealing part can be quickly cooled and formed. The lower surface of the workbench is fixedly connected to a supporting leg, and the first motor and the second motor are both connected to an external power supply.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] (1) The sealing device for plastic bag production has a pressing plate arranged on the surface of the plastic bag. The pressing plate can follow the movable seat and the first sliding block and move when it is in close contact with the surface of the plastic bag. The plastic bag can be pressed flat and the air inside can be discharged at the same time, thereby avoiding wrinkles during sealing, which would affect the sealing effect of the plastic bag and improve the sealing quality.

[0017] (2) This sealing device for plastic bag production has a cooling block arranged on the surface of the extrusion plate. The cooling block can move along with the extrusion plate and the second sliding block. After the plastic bag is sealed, the cooling block moves to the top of the sealing portion. The second sliding block drives the cooling block to move back and forth, which is convenient for cooling the sealing portion. The sealing portion of the plastic bag is quickly cooled and formed, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a partial structural schematic diagram of the utility model;

[0020] Figure 3 It is a schematic diagram of the connection structure between the fixing plate and the limiting plate of the utility model;

[0021] Figure 4 It is a schematic diagram of the internal structure of the extruded plate of the utility model.

[0022] In the figure: 1. workbench; 2. first fixed seat; 3. first hydraulic device; 4. movable seat; 5. fixed plate; 6. spring; 7. limit plate; 8. first sliding groove; 9. first motor; 10. first lead screw; 11. first sliding block; 12. extrusion plate; 13. second fixed seat; 14. second hydraulic device; 15. hot melt block; 16. second sliding groove; 17. second motor; 18. second lead screw; 19. second sliding block; 20. cooling block; 21. supporting leg. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4 The utility model provides an embodiment: a sealing device for plastic bag production, comprising a workbench 1, first fixed seats 2 are fixedly connected to both sides of the workbench 1, a first hydraulic device 3 is fixedly connected to the upper surface of the first fixed seat 2, a movable seat 4 is fixedly connected to the top of the first hydraulic device 3, and the outer surface of the movable seat 4 is slidably connected to the workbench 1. The first hydraulic device 3 can drive the movable seat 4 to move up and down, which is convenient for the limiting plate 7 to limit the plastic bag and for the extrusion plate 12 to be close to the plastic bag to make it flat.

[0025] The outer surface of the movable seat 4 is fixedly connected to a fixed plate 5, and the lower surface of the fixed plate 5 is fixedly connected to a spring 6. The spring 6 increases a buffer space for the limit plate 7. One end of the spring 6 away from the fixed plate 5 is fixedly connected to the limit plate 7, which can be lowered as a whole with the movable seat 4 to facilitate limiting one side of the plastic bag and prevent the plastic bag from being displaced when the extrusion plate 12 is flattening it. The lower surface of the limit plate 7 is movably connected to the workbench 1.

[0026] A first sliding groove 8 is provided on the outer surface of the movable seat 4, and a first motor 9 is fixedly connected inside the first sliding groove 8, and a first lead screw 10 is fixedly connected to the output end of the first motor 9. The outer surface of the first lead screw 10 is threadedly connected to a first sliding block 11. The rotation of the first lead screw 10 can drive the first sliding block 11 to move back and forth as a whole, thereby driving the extrusion plate 12 to move. The outer surface of the first sliding block 11 is slidably connected to the movable seat 4, and the movable seat 4 can limit the first sliding block 11 so that it cannot rotate and can only move in parallel. The side surface of the first sliding block 11 is fixedly connected with an extrusion plate 12, and the outer surface of the extrusion plate 12 is slidably connected to the first sliding groove 8. The extrusion plate 12 moves parallel to the first sliding block 11, which is convenient for flattening the plastic bag on the surface of the workbench 1 and expelling the internal air to avoid wrinkles during sealing.

[0027] The lower surface of the extrusion plate 12 is slidably connected to the workbench 1, and the upper surface of the extrusion plate 12 is fixedly connected to a second fixed seat 13. The lower surface of the second fixed seat 13 is provided with a second hydraulic device 14 to facilitate driving the hot melt block 15 to descend and seal the edge of the plastic bag. The bottom end of the second hydraulic device 14 is provided with a hot melt block 15.

[0028] A second sliding groove 16 is provided on the outer surface of the extrusion plate 12, and a second motor 17 is fixedly connected to the inside of the second sliding groove 16. A second lead screw 18 is fixedly connected to the output end of the second motor 17. The second motor 17 can drive the second lead screw 18 to rotate. The outer surface of the second lead screw 18 is threadedly connected to a second sliding block 19. The rotation of the second lead screw 18 can drive the second sliding block 19 to move back and forth. The outer surface of the second sliding block 19 is slidably connected to the second sliding groove 16. The second sliding groove 16 can limit the second sliding block 19 so that the second sliding block 19 cannot rotate but can only move in parallel.

[0029] A cooling block 20 is provided on the lower surface of the second sliding block 19, and the outer surface of the cooling block 20 is slidably connected to the second sliding groove 16. The cooling block 20 moves left and right following the second sliding block 19, and can cool the sealing part of the plastic bag so that the sealing part can be quickly cooled and formed. A supporting leg 21 is fixedly connected to the lower surface of the workbench 1, and the first motor 9 and the second motor 17 are both connected to an external power supply.

[0030] When the embodiment of the present application is in use: a plastic bag is placed on the surface of the workbench 1, the two groups of movable seats 4 are controlled to descend, so that the limit plate 7 limits the plastic bag, and the extrusion plate 12 is close to the surface of the plastic bag, and then the first motor 9 is started to drive the first screw 10 to rotate, and the first sliding block 11 and the extrusion plate 12 are driven to move to one side, the plastic bag is pressed flat, and the internal air is discharged, and then the second hydraulic device 14 is controlled to make the hot melt block 15 descend to seal the plastic bag, and then the extrusion plate 12 is continued to be controlled to move to one side, so that the sealing part moves to the second sliding groove 16, and the second motor 17 is started to drive the second screw 18 to rotate, so that the second sliding block 19 drives the cooling block 20 to move left and right, and the sealing part of the plastic bag is cooled and cooled.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A sealing device for plastic bag production, characterized in that: include: A workbench (1), wherein first fixed seats (2) are fixedly connected to both sides of the workbench (1), a first hydraulic device (3) is fixedly connected to the upper surface of the first fixed seat (2), a movable seat (4) is fixedly connected to the top of the first hydraulic device (3), and an outer surface of the movable seat (4) is slidably connected to the workbench (1); The outer surface of the movable seat (4) is fixedly connected to a fixed plate (5), the lower surface of the fixed plate (5) is fixedly connected to a spring (6), one end of the spring (6) away from the fixed plate (5) is fixedly connected to a limit plate (7), the lower surface of the limit plate (7) is movably connected to the workbench (1), the outer surface of the movable seat (4) is provided with a first sliding groove (8), the interior of the first sliding groove (8) is fixedly connected to a first motor (9), the output end of the first motor (9) is fixedly connected to a first lead screw (10), the outer surface of the first lead screw (10) is threadedly connected to a first sliding block (11), the outer surface of the first sliding block (11) is slidably connected to the movable seat (4), the side surface of the first sliding block (11) is fixedly connected to an extrusion plate (12), the outer surface of the extrusion plate (12) is slidably connected to the first sliding groove (8); The lower surface of the extrusion plate (12) is slidably connected to the workbench (1), the upper surface of the extrusion plate (12) is fixedly connected to a second fixing seat (13), the lower surface of the second fixing seat (13) is provided with a second hydraulic device (14), and the bottom end of the second hydraulic device (14) is provided with a hot melt block (15).

2. A sealing device for plastic bag production according to claim 1, characterized in that: The outer surface of the extrusion plate (12) is provided with a second sliding groove (16).

3. A sealing device for plastic bag production according to claim 2, characterized in that: A second motor (17) is fixedly connected inside the second sliding groove (16).

4. A sealing device for plastic bag production according to claim 3, characterized in that: The output end of the second motor (17) is fixedly connected to a second lead screw (18).

5. A sealing device for plastic bag production according to claim 4, characterized in that: The outer surface of the second lead screw (18) is threadedly connected to a second sliding block (19).

6. A sealing device for plastic bag production according to claim 5, characterized in that: The outer surface of the second sliding block (19) is slidably connected to the second sliding groove (16), and a cooling block (20) is provided on the lower surface of the second sliding block (19).

7. A sealing device for plastic bag production according to claim 6, characterized in that: The outer surface of the cooling block (20) is slidably connected to the second sliding groove (16), the lower surface of the workbench (1) is fixedly connected to a supporting leg (21), and the first motor (9) and the second motor (17) are both connected to an external power supply.

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