Sealing device for packaging bag production

Abstract

The utility model discloses a sealing device for packaging bag production, which comprises a frame, a transverse frame is fixedly mounted in the frame, an upper movable plate and a lower movable plate are symmetrically arranged in the frame by taking the top surface of the transverse frame as a reference surface, and the bottom of the upper movable plate and the top of the lower movable plate are fixedly connected with two electric heating strips respectively. Mounting grooves are formed in the inner walls of the two sides of the frame; when the plastic bag semi-finished product sealing device is used, after the position, with a sealing opening, of a plastic bag semi-finished product is moved to the position above the transverse frame, the air cylinder is started to push the upper movable plate to move downwards, the lower movable plate can be driven to move upwards, and therefore the electric heating strips on the upper movable plate and the lower movable plate are clamped on the upper side and the lower side of the plastic bag semi-finished product. The upper face and the lower face of the plastic bag semi-finished product are heated at the same time so that sealing reliability can be guaranteed, then the air cylinder pushes the movable plate to continue to descend, the cutter can move downwards so that the plastic bag can be cut at the heat sealing position, adjacent plastic bags can be separated, and using is more convenient.

Description

Technical Field

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

[0002] During the production process of the packaging bag, the redundant opening needs to be heat-sealed to form a container with only one opening.

[0003] After searching, the patent with announcement number CN220841681U discloses a heat sealing device for packaging bag production, which drives the U-shaped column to rotate through a motor, utilizes the upper fixed block and the lower fixed block to rotatably connect the second screw rod with the U-shaped column, and drives the second screw rod to perform up and down circular motion through the U-shaped structure of the U-shaped column, and drives the upper sealing boss to perform up and down motion through the connection between the first screw rod, the sleeve, the second screw rod and the fixed plate, so that the plastic bag can be heat-sealed by utilizing the cooperation of the upper sealing boss and the lower sealing boss.

[0004] In actual use of the above scheme, since the heating wire is only installed on the upper sealing boss, only the upper sealing boss can heat the plastic bag, resulting in that during the sealing process, the opening of the plastic bag is heated on one side, and only the plastic on one side of the opening will melt due to the heat, making it difficult to ensure the quality of the sealing. In addition, the sealing device does not have a cutting function and cannot cut adjacent plastic bags that have been sealed, which needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a sealing device for packaging bag production to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A sealing device for packaging bag production comprises a frame, a horizontal frame is fixedly installed in the frame, an upper movable plate and a lower movable plate are symmetrically arranged in the frame with the top surface of the horizontal frame as a reference plane, the bottom of the upper movable plate and the top of the lower movable plate are fixedly connected to two electric heating strips, the inner walls on both sides of the frame are provided with mounting grooves, both ends of the upper movable plate and the lower movable plate can be slidably installed in the corresponding mounting grooves, the upper movable plate and the electric heating strip are reversely driven and connected, a cylinder is fixedly installed on the top of the frame, a connecting plate is fixedly connected to the push rod end of the cylinder, the connecting plate is elastically connected to the upper movable plate, a cutting knife is detachably installed on the bottom of the connecting plate, and a cutting groove matching the cutting knife is provided on the upper movable plate and the lower movable plate.

[0008] As a further solution of the utility model: Gears are rotatably installed in the installation grooves. Both ends of the bottom of the upper movable plate and both ends of the top of the lower movable plate are fixedly connected with racks. The gears are meshed with the two corresponding racks respectively. Open slots are penetrated through both ends of the top of the upper movable plate and the lower movable plate close to the two ends. The open slots are aligned with the corresponding racks in the vertical direction.

[0009] As a further solution of the utility model: Both inner walls of both sides of the installation groove are fixedly connected with guide rails. Guide grooves are opened on both outer walls of the upper movable plate and the lower movable plate located in the installation groove. The guide rails pass through the corresponding guide grooves.

[0010] As a further solution of the utility model: A plurality of guide rods are slidably penetrated through the top of the connecting plate. The top ends of the guide rods are fixedly connected with limit blocks. The bottom ends of the guide rods are fixedly connected with the top of the upper movable plate. Springs are sleeved on the outer walls of the guide rods between the connecting plate and the upper movable plate.

[0011] As a further solution of the utility model: A knife holder is fixedly installed at the bottom of the connecting plate. The cutting knife is connected with the knife holder through a plurality of screws.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] When the utility model is in use, after moving the bagged part with the sealed part of the plastic bag semi-finished product above the horizontal frame, the air cylinder is started to push the upper movable plate to move downward, which can drive the lower movable plate to move upward, so that the electric heating strips on the upper movable plate and the lower movable plate are clamped on the upper and lower sides of the plastic bag semi-finished product, so as to heat the upper and lower surfaces of the plastic bag semi-finished product at the same time to ensure the reliability of the sealing. Then the air cylinder pushes the movable plate to continue to descend, and the cutting knife can move downward to cut the plastic bag at the heat-sealed part to realize the separation of adjacent plastic bags, which is more convenient to use. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of a sealing device for packaging bag production.

[0015] Figure 2 It is a schematic structural diagram of a transmission mechanism in a sealing device for packaging bag production.

[0016] Figure 3 It is a schematic structural diagram of a knife-passing groove in a sealing device for packaging bag production.

[0017] Among them, there are frame 1, cross frame 2, upper movable plate 3, lower movable plate 4, electric heating strip 5, cylinder 6, connecting plate 7, guide rod 8, limit block 9, spring 10, knife seat 11, cutting knife 12, knife groove 13, guide groove 14, guide rail 15, mounting groove 16, gear 17, rack 18, and opening groove 19. DETAILED DESCRIPTION

[0018] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. 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.

[0019] See also Figures 1 to 3 In the embodiment of the utility model, a sealing device for packaging bag production includes a frame 1, a transverse frame 2 is fixedly installed in the frame 1, an upper movable plate 3 and a lower movable plate 4 are symmetrically arranged in the frame 1 with the top surface of the transverse frame 2 as the reference plane, the bottom of the upper movable plate 3 and the top of the lower movable plate 4 are fixedly connected with two electric heating strips 5, the inner walls of both sides of the frame 1 are provided with mounting grooves 16, both ends of the upper movable plate 3 and the lower movable plate 4 can be slidably installed in the corresponding mounting grooves 16, the upper movable plate 3 and the electric heating strip 5 are reversely driven and connected, a cylinder 6 is fixedly installed on the top of the frame 1, the push rod end of the cylinder 6 is fixedly connected with a connecting plate 7, the connecting plate 7 is elastically connected to the upper movable plate 3, and a cutting knife 12 is detachably installed at the bottom of the connecting plate 7, and a cutting groove 13 adapted to the cutting knife 12 is provided on the upper movable plate 3 and the lower movable plate 4.

[0020] By adopting the above scheme, when in use, the utility model moves the sealed portion of the semi-finished plastic bag to above the horizontal frame 2, and then starts the cylinder 6 to push the upper movable plate 3 to move downward, which can drive the lower movable plate 4 to move upward, so that the electric heating strips 5 on the upper movable plate 3 and the lower movable plate 4 are clamped on the upper and lower sides of the semi-finished plastic bag, so as to heat the upper and lower sides of the semi-finished plastic bag at the same time to ensure the reliability of the seal, and then the cylinder pushes the movable plate 3 to continue to descend, so that the cutter 12 can move downward to cut the plastic bag at the heat seal, so as to separate adjacent plastic bags, which is more convenient to use.

[0021] Specific combination Figure 2, in an embodiment of the present utility model, gears 17 are rotatably installed in the installation grooves 16. At both ends of the bottom of the upper movable plate 3 and at both ends of the top of the lower movable plate 4, racks 18 are fixedly connected. The gears 17 are meshed with the two corresponding racks 18 respectively. At both ends near the top of the upper movable plate 3 and the lower movable plate 4, opening grooves 19 are provided through. The opening grooves 19 are aligned with the corresponding racks 18 in the vertical direction.

[0022] Through the cooperation of the two racks 18 and the corresponding gears 17, the upper movable plate 3 and the lower movable plate 4 can move in opposite directions simultaneously.

[0023] Specifically combined with Figure 2 and Figure 3 , in an embodiment of the present utility model, guide rails 15 are fixedly connected to both inner walls of the installation grooves 16. Guide grooves 14 are provided on both outer walls of the upper movable plate 3 and the lower movable plate 4 located in the installation grooves 16. The guide rails 15 pass through the corresponding guide grooves 14.

[0024] Through the cooperation of the guide rails 15 and the guide grooves 14, the stability of the up-and-down movement of the upper movable plate 3 and the lower movable plate 4 in the frame 1 can be ensured.

[0025] Specifically combined with Figure 3 , in an embodiment of the present utility model, a plurality of guide rods 8 are slidably penetrated through the top of the connecting plate 7. The top ends of the guide rods 8 are fixedly connected with limit blocks 9. The bottom ends of the guide rods 8 are fixedly connected with the top of the upper movable plate 3. Springs 10 are sleeved on the outer walls of the guide rods 8 between the connecting plate 7 and the upper movable plate 3.

[0026] Through the arrangement of the guide rods 8, the stability of the relative movement between the connecting plate 7 and the upper movable plate 3 can be ensured. And by the arrangement of the springs 10, when the air cylinder 6 pushes the connecting plate 7 to descend, the electric heating strips 5 on the surfaces of the upper movable plate 3 and the lower movable plate 4 will clamp the semi-finished packaging bags. Then, when the air cylinder 6 pushes the connecting plate 7 to continue descending, the springs 10 will be compressed and drive the cutting knife 12 to move downward continuously to cut the clamped packaging bags.

[0027] Specifically combined with Figure 3 , in an embodiment of the present utility model, a knife holder 11 is fixedly installed at the bottom of the connecting plate 7. The cutting knife 12 is connected to the knife holder 11 through a plurality of screws, so as to facilitate the disassembly and assembly of the cutting knife 12 on the knife holder 11.

[0028] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sealing device for packaging bag production, characterized in that: The invention comprises a frame (1), wherein a transverse frame (2) is fixedly installed in the frame (1), wherein an upper movable plate (3) and a lower movable plate (4) are symmetrically arranged in the frame (1) with the top surface of the transverse frame (2) as a reference plane, wherein the bottom of the upper movable plate (3) and the top of the lower movable plate (4) are both fixedly connected with two electric heating strips (5), and the inner walls on both sides of the frame (1) are provided with mounting grooves (16), and both ends of the upper movable plate (3) and the lower movable plate (4) can be slidably installed on the corresponding In the mounting groove (16), the upper movable plate (3) and the electric heating strip (5) are connected in reverse transmission, a cylinder (6) is fixedly mounted on the top of the frame (1), a connecting plate (7) is fixedly connected to the push rod end of the cylinder (6), the connecting plate (7) is elastically connected to the upper movable plate (3), a cutting knife (12) is detachably mounted on the bottom of the connecting plate (7), and a cutting groove (13) adapted to the cutting knife (12) is provided on both the upper movable plate (3) and the lower movable plate (4).

2. A sealing device for packaging bag production according to claim 1, characterized in that: A gear (17) is rotatably mounted in each of the mounting grooves (16); racks (18) are fixedly connected at both ends of the bottom of the upper movable plate (3) and at both ends of the top of the lower movable plate (4); the gears (17) are meshed with two corresponding racks (18); and open grooves (19) are provided through the tops of the upper movable plate (3) and the lower movable plate (4) near both ends; the open grooves (19) are aligned with the corresponding racks (18) in the vertical direction.

3. A sealing device for packaging bag production according to claim 1, characterized in that: The inner walls on both sides of the installation groove (16) are fixedly connected with guide rails (15), and the outer walls on both sides of the upper movable plate (3) and the lower movable plate (4) located in the installation groove (16) are provided with guide grooves (14), and the guide rails (15) pass through the corresponding guide grooves (14).

4. A sealing device for packaging bag production according to claim 1, characterized in that: A plurality of guide rods (8) are slidably provided on the top of the connecting plate (7), the top ends of the guide rods (8) are fixedly connected to limit blocks (9), the bottom ends of the guide rods (8) are fixedly connected to the top of the upper movable plate (3), and the outer wall of the guide rods (8) between the connecting plate (7) and the upper movable plate (3) is sleeved with springs (10).

5. A sealing device for packaging bag production according to claim 1, characterized in that: A knife seat (11) is fixedly mounted on the bottom of the connecting plate (7), and the cutting knife (12) is connected to the knife seat (11) via a plurality of screws.

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