Plastic packaging bag heat sealing device

Abstract

The utility model relates to the technical field of plastic packaging bag heat sealing, in particular to a plastic packaging bag heat sealing device which comprises two conveying plates, a clamping plate, a mounting frame, a second electric push rod, a first buffer plate, a pressing plate and a heat sealing assembly, the two conveying plates are oppositely arranged, and the clamping plate is slidably arranged between the two conveying plates; a heat sealing opening is formed in the plate face of the clamping plate, the mounting frame is arranged on the clamping plate and located between the two conveying plates, the second electric push rod is arranged on the side, away from the clamping plate, of the mounting frame and fixedly connected with the mounting frame, and the end of a push rod of the second electric push rod penetrates into the mounting frame to be fixedly connected with the first buffer plate. And the pressing plate is arranged between the first buffer plate and the clamping plate, the pressing plate is slidably connected with the first buffer plate, the heat sealing assembly is arranged on one side of the conveying plate in the length direction, and the effects that heat sealing is safely and rapidly conducted on the plastic packaging bag, the situation that a worker holds the plastic packaging bag by hand to be close to the heat sealing device for heat sealing is avoided, and safety is improved are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of heat sealing of plastic packaging bags, and in particular to a heat sealing device for plastic packaging bags. Background Art

[0002] At present, heat sealing is the most common and practical bag-making method used in composite packaging materials. It uses various external conditions (such as electric heating, high-frequency voltage or ultrasound, etc.) to heat the sealing position of the plastic bag into a viscous flow state, and with the help of a certain pressure, the two layers of film are fused into one.

[0003] In the existing heat sealing of plastic packaging bags, a worker holds the plastic packaging bag and places it between two hot knives. After the plastic packaging bag is placed, the heat sealing device is started, and the two hot knives approach each other to heat seal the opening of the plastic packaging bag.

[0004] The above-mentioned existing technical solutions have the following defects: during the heat sealing process, the temperature of the hot knife is relatively high, and workers holding the plastic packaging bag close to the heat sealing device for heat sealing may easily cause burns due to improper operation, and the safety is low. Utility Model Content

[0005] In order to safely and quickly heat-seal plastic packaging bags, the present application provides a plastic packaging bag heat-sealing device to avoid workers holding the plastic packaging bags close to the heat-sealing device for heat-sealing, thereby improving safety.

[0006] The above technical objectives of this application are achieved through the following technical solutions:

[0007] A heat sealing device for plastic packaging bags comprises a conveying plate, a clamping plate, a mounting frame, a second electric push rod, a first buffer plate, a pressure plate and a heat sealing assembly, wherein the conveying plates are provided with two pieces and are arranged opposite to each other, the clamping plate is slidably arranged between the two conveying plates, a heat sealing opening is provided on the surface of the clamping plate, the mounting frame is provided on the clamping plate and is located between the two conveying plates, the second electric push rod is provided on the side of the mounting frame away from the clamping plate and is fixed to the mounting frame, the push rod end of the second electric push rod penetrates into the mounting frame and is fixed to the first buffer plate, the pressure plate is provided between the first buffer plate and the clamping plate, the pressure plate is slidably connected to the first buffer plate, and the heat sealing assembly is provided on one side of the conveying plate in the length direction.

[0008] By adopting the above technical solution, by arranging a conveyor plate, a clamping plate, a mounting frame, a second electric push rod, a first buffer plate, a pressing plate, and a heat-sealing assembly, when heat-sealing plastic packaging bags, the arranged plastic packaging bags are placed between the clamping plate and the pressing plate, and the portion of the plastic packaging bags to be heat-sealed is covered at the heat-sealing opening. The second electric push rod pushes the first buffer plate and the pressing plate to clamp and secure the plastic packaging bags, preventing workers from holding the plastic packaging bags directly near the heat-sealing device and preventing burns, thereby improving safety. The pressing plate can prevent wrinkles in the plastic packaging bags during transportation, improving heat-sealing efficiency, and the heat-sealing assembly can heat-seal the plastic packaging bags.

[0009] Optionally, sliding grooves are provided on the opposite surfaces of the two conveying plates, and rollers are fixedly connected to the side walls of the clamping plates. The rollers are adapted to the sliding grooves and are slidably arranged in the sliding grooves. The heat sealing device also includes a first electric push rod, which is fixedly arranged on the side walls of the push plates, and the push rod of the first electric push rod is connected to the side walls of the clamping plates through a connecting rod.

[0010] By adopting the above technical solution, by setting up a first electric push rod and a roller, the clamped and fixed plastic packaging bags can be transported, avoiding the staff holding the plastic packaging bags directly close to the heat sealing device to prevent burns, thereby improving safety. The roller can prevent the side wall of the clamping plate from directly sliding with the sliding groove wall for a long time and causing wear.

[0011] Optionally, a receiving hole is provided on the first buffer plate, and a first sliding column is provided on the plate surface of the pressure plate opposite to the first buffer plate. The first sliding column is adapted to the receiving hole and slides through the receiving hole. The heat sealing assembly also includes a spring, which is provided between the first buffer plate and the pressure plate, and is sleeved on the first sliding column.

[0012] By adopting the above technical solution, by setting the first sliding column, the first buffer plate, the first sliding column and the spring, it is possible to prevent the pressure plate from being overly stressed during the conveyance of the plastic packaging bag, causing the two layers of arranged plastic to shift and reducing the heat sealing yield.

[0013] Optionally, a first annular thickened portion is formed on one end of the peripheral wall of the sliding column away from the pressure plate.

[0014] By adopting the above technical solution and providing the first annular thickened portion, it is possible to prevent the pressure plate from being separated from the first buffer plate during use.

[0015] Optionally, the heat sealing assembly includes a first heat sealing frame, a third electric push rod, a second buffer plate, a main heat sealing splint and a main heat sealing knife. The first heat sealing frame is arranged on one side of the conveying plate in the length direction and is fixed to the side wall of the conveying plate. The third electric push rod is arranged on the side of the first heat sealing frame away from the conveying plate and is fixed to the first heat sealing frame. The push rod of the third electric push rod penetrates the first heat sealing frame and is fixed to the second buffer plate. The main heat sealing splint is arranged on the side of the second buffer plate away from the third electric push rod. The main heat sealing splint is slidably connected to the second buffer plate. The main heat sealing knife is fixedly arranged on the plate surface of the main heat sealing splint away from the second buffer plate.

[0016] By adopting the above technical solution, by arranging the first heat sealing frame, the third electric push rod, the second buffer plate, the main heat sealing splint and the main heat sealing knife, when heat sealing the plastic packaging bag, the third electric push rod can drive the second buffer plate and the main heat sealing splint, thereby driving the main heat sealing knife to move closer to the auxiliary heat sealing knife, and cooperate with the auxiliary heat sealing knife to heat seal the plastic packaging bag, thereby improving work efficiency.

[0017] Optionally, a receiving hole is provided on the second buffer plate, and a second sliding column is provided on the plate surface of the heat sealing main splint opposite to the second buffer plate. The second sliding column is adapted to the receiving hole and slides through the receiving hole. The heat sealing assembly also includes a spring, which is provided between the second buffer plate and the heat sealing main splint, and the spring is sleeved on the second sliding column.

[0018] By adopting the above technical solution and providing the second sliding post, the second buffer plate, the second sliding post and the spring, it is possible to further apply pressure to the main heat sealing knife during the heat sealing process, thereby improving the heat sealing strength.

[0019] Optionally, the first heat sealing frame is a U-shaped frame composed of a horizontal bar and two vertical bars, the opposite side walls of the two vertical bars are provided with a first limiting groove, and the end surface of the second buffer plate is provided with a first limiting piece, which is adapted to the first limiting groove and is slidably arranged in the first limiting groove.

[0020] By adopting the above technical solution and setting the first limiting member and the first limiting groove, the trajectory of the second buffer plate during the heat sealing process can be limited to avoid shaking and interfere with the heat sealing of the plastic packaging bag by the main heat sealing knife, thereby improving the heat sealing effect.

[0021] Optionally, the heat sealing assembly also includes a second heat sealing frame, a fourth electric push rod, a third buffer plate, a heat sealing auxiliary splint and a heat sealing auxiliary hot knife. The second heat sealing frame is arranged on the side of the conveying plate away from the first heat sealing frame and is fixed to the side wall of the conveying plate. The fourth electric push rod is arranged on the side of the second heat sealing frame away from the conveying plate and is fixed to the second heat sealing frame. The push rod of the fourth electric push rod penetrates the second heat sealing frame and is fixed to the third buffer plate. The heat sealing auxiliary splint is arranged on the side of the third buffer plate away from the fourth electric push rod. The heat sealing auxiliary splint is slidably connected to the third buffer plate. The heat sealing auxiliary hot knife is fixedly arranged on the plate surface of the heat sealing auxiliary splint away from the third buffer plate.

[0022] By adopting the above technical solution, by arranging the second heat sealing frame, the fourth electric push rod, the third buffer plate, the heat sealing auxiliary splint and the heat sealing auxiliary hot knife, when heat sealing the plastic packaging bag, the fourth electric push rod can drive the third buffer plate and the heat sealing auxiliary splint, thereby driving the heat sealing auxiliary hot knife to approach the heat sealing main hot knife, and cooperate with the heat sealing main hot knife to heat seal the plastic packaging bag, thereby improving work efficiency.

[0023] Optionally, a receiving hole is provided on the third buffer plate, and a third sliding column is provided on the plate surface of the heat sealing sub-split plate opposite to the third buffer plate. The third sliding column is adapted to the receiving hole and slides through the receiving hole. The heat sealing assembly also includes a spring, which is provided between the third buffer plate and the heat sealing sub-split plate, and the spring is sleeved on the third sliding column.

[0024] By adopting the above technical solution and providing the third sliding post, the third buffer plate, the third sliding post and the spring, further pressure can be applied to the auxiliary heat sealing blade during the heat sealing process, thereby improving the heat sealing strength.

[0025] Optionally, the second heat sealing frame is a U-shaped frame composed of a horizontal bar and two vertical bars, and the opposite side walls of the two vertical bars are provided with a second limiting groove. The end surface of the third buffer plate is provided with a second limiting piece, and the second limiting piece is adapted to the second limiting groove and is slidably arranged in the second limiting groove.

[0026] By adopting the above technical solution and setting a second limit member and a second limit groove, the trajectory of the movement of the third buffer plate during the heat sealing process can be limited to avoid shaking and interfere with the heat sealing auxiliary hot sealing knife in heat sealing the plastic packaging bag, thereby improving the heat sealing effect.

[0027] In summary, this application has the following technical effects:

[0028] 1. By arranging a conveyor plate, a clamping plate, a mounting frame, a second electric push rod, a first buffer plate, a pressure plate, and a heat-sealing assembly, when heat-sealing plastic packaging bags, the arranged plastic packaging bags are placed between the clamping plate and the pressure plate, and the portion of the plastic packaging bag to be heat-sealed is placed at the heat-sealing opening. The second electric push rod pushes the first buffer plate and the pressure plate to clamp and secure the plastic packaging bags, preventing workers from holding the plastic packaging bags directly near the heat-sealing device and preventing burns, thereby improving safety. The pressure plate can prevent wrinkles in the plastic packaging bags during transportation, improving heat-sealing efficiency, and the heat-sealing assembly can heat-seal the plastic packaging bags.

[0029] 2. By setting up the first electric push rod and roller, the clamped plastic packaging bags can be transferred, preventing workers from holding the plastic packaging bags directly close to the heat sealing device to prevent burns, thereby improving safety. The roller can prevent the side wall of the clamping plate from sliding directly against the sliding groove wall for a long time and causing wear;

[0030] 3. The first sliding column, the first buffer plate, the first sliding column and the spring can prevent the pressing plate from exerting excessive pressure during the conveyance of the plastic packaging bag, causing the two layers of plastic to deviate and reducing the heat sealing yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is the appearance structure diagram of this application;

[0032] Figure 2 This is a structural diagram of the application from another angle;

[0033] Figure 3 It is a prominent structural diagram of the clamping plate of this application.

[0034] Explanation of the accompanying drawings: 1. Clamping assembly; 11. Support frame; 111. Support leg; 12. Conveying plate; 121. Sliding groove; 13. Clamping plate; 131. Heat sealing port; 132. Roller; 14. First electric push rod; 15. Mounting frame; 16. Second electric push rod; 17. First buffer plate; 18. Pressing plate; 181. First sliding column; 182. First annular thickening portion; 2. Heat sealing assembly; 21. First heat sealing frame; 22. Third electric push rod; 23. Second buffer plate; 24. Main heat sealing splint; 241. Second sliding column; 242. Main heat sealing knife; 243. Second annular thickening portion; 25. Second heat sealing frame; 26. Fourth electric push rod; 27. Third buffer plate; 28. Sub-heat sealing splint; 281. Third sliding column; 282. Sub-heat sealing knife; 283. Third annular thickening portion; 29. PLC processor. DETAILED DESCRIPTION

[0035] The present application is further described in detail below with reference to the accompanying drawings.

[0036] The present application discloses a heat sealing device for plastic packaging bags. Figure 1 The device includes a clamping component 1 and a heat sealing component 2. The clamping component 1 can clamp and fix the plastic packaging bag to be heat-sealed, and transport it to the heat sealing component 2 for heat-sealing. The clamping component 1 can prevent the staff from holding the plastic packaging bag close to the heat sealing device, thereby improving safety.

[0037] Combine Figure 1 and Figure 3 The clamping assembly 1 includes a support frame 11, a conveying plate 12, and a clamping plate 13. The support frame 11 is a frame structure constructed by combining multiple square rods. The support frame 11 includes four support legs 111, which are vertically arranged. The conveying plate 12 is arranged on the support frame 11. The conveying plate 12 is a strip-shaped plate. There are two conveying plates 12. The two conveying plates 12 are parallel to each other and are spaced apart. The side walls of the conveying plates 12 are fixed to the upper ends of the two support legs 111 on one side of the support frame 11. The length direction of the conveying plates 12 is perpendicular to the length direction of the support legs 111. The clamping plate 13 is disposed between the two conveying plates 12. The length of the clamping plate 13 is parallel to that of the conveying plates 12, and the surface of the clamping plate 13 is perpendicular to that of the conveying plates 12. Rollers 132 are fixedly attached to the side walls of the clamping plate 13, with the axis of the roller 132 perpendicular to the length of the clamping plate 13. Sliding grooves 121 are provided on the opposing surfaces of the two conveying plates 12. The rollers 132 fit into and slide within the sliding grooves 121. The side walls of the clamping plate 13 are slidably inserted into the sliding grooves 121. The rollers 132 prevent the side walls of the clamping plate 13 from directly sliding against the walls of the sliding grooves 121 for extended periods, which can cause wear. A first electric push rod 14 is disposed on the side wall of the conveying plate 12 facing away from the support frame 11. The push rod end of the first electric push rod 14 is connected to the side wall of the clamping plate 13 via a connecting rod that penetrates the conveying plate 12. The length of the first electric push rod 14 is parallel to the length of the conveying plate 12. A heat seal opening 131 is provided on the surface of the clamping plate 13 . The heat seal opening 131 is strip-shaped and connects the two surfaces of the clamping plate 13 . The heat seal opening 131 is close to one end surface of the clamping plate 13 .

[0038] Combine Figure 1 and Figure 2The clamping assembly 1 includes a mounting frame 15, a second electric push rod 16, and a first buffer plate 17. The mounting frame 15 is positioned on the surface of the clamping plate 13 facing away from the support frame 11. The mounting frame 15 is a U-shaped frame composed of a horizontal bar and two vertical bars. The ends of the two vertical bars of the mounting frame 15 away from the horizontal bar are fixed to the surface of the clamping plate 13, and the length direction of the vertical bars is perpendicular to the surface of the clamping plate 13. The length direction of the horizontal bar of the mounting frame 15 is perpendicular to the length direction of the clamping plate 13. The mounting frame 15 is located between the two conveying plates 12 and is spaced apart from the surface of the conveying plates 12. The second electric push rod 16 is positioned on the mounting frame 15, on the side of the mounting frame 15 facing away from the clamping plate 13. The push rod end of the second electric push rod 16 penetrates the horizontal bar of the mounting frame 15 and is located between the mounting frame 15 and the clamping plate 13. The first buffer plate 17 is arranged between the mounting frame 15 and the clamping plate 13. The surface of the first buffer plate 17 is fixedly connected to the end of the push rod of the second electric push rod 16. The length direction of the first buffer plate 17 is perpendicular to the length direction of the clamping plate 13 and the first buffer plate 17 is spaced apart from the clamping plate 13. The first buffer plate 17 is located between the two vertical rods of the mounting part, and the end surface of the first buffer plate 17 is spaced apart from the side wall of the vertical rod of the mounting frame 15.

[0039] Combine Figure 1 and Figure 2 The clamping assembly 1 also includes a pressure plate 18 and a spring. The pressure plate 18 is arranged between the first buffer plate 17 and the clamping plate 13. The length direction of the pressure plate 18 is parallel to the length direction of the first buffer plate 17 and the pressure plate 18 is spaced apart from the first buffer plate 17. The surface of the pressure plate 18 facing away from the first buffer plate 17 can fit the surface of the clamping plate 13. The surface of the pressure plate 18 opposite to the first buffer plate 17 is processed with a first sliding column 181. The length direction of the first sliding column 181 is perpendicular to the surface of the pressure plate 18. The corresponding position of the surface of the pressure plate 18 is opened. A accommodating hole is provided, which connects the two surfaces of the pressure plate 18. The first sliding column 181 is adapted to the accommodating hole and slides through the accommodating hole. The end of the peripheral wall of the first sliding column 18 away from the pressure plate 18 is processed to form a first annular thickened portion 182. The first annular thickened portion 182 can prevent the pressure plate 18 from being separated from the first buffer plate 17. The spring is arranged between the first buffer plate 17 and the pressure plate 18. The spring is sleeved on the first sliding column 181. One end of the spring is fixed to the surface of the pressure plate 18, and the other end is fixed to the surface of the first buffer plate 17.

[0040] Combine Figure 1 and Figure 2When heat-sealing plastic packaging bags, the pre-assembled plastic packaging bags are placed between the clamping plate 13 and the pressing plate 18. The location of the plastic packaging bag to be heat-sealed is positioned at the heat-seal opening 131. The second electric push rod 16 pushes the first buffer plate 17 and the pressing plate 18 to clamp and secure the plastic packaging bag. The pressing plate 18 prevents wrinkles in the plastic packaging bag during transport, improving heat-sealing efficiency. The first electric push rod 14 drives the clamping plate 13 to move it to the heat-sealing assembly 2 for heat-sealing. The first buffer plate 17, the first sliding post 181, and the spring prevent the pressing plate 18 from exerting excessive pressure during transport, which could cause the two pre-assembled plastic layers to shift and reduce the heat-sealing yield.

[0041] Combine Figure 1 and Figure 2 The heat sealing assembly 2 includes a first heat sealing frame 21, a third electric push rod 22, and a second buffer plate 23. The first heat sealing frame 21 is located on the side of the conveying plate 12 away from the support frame 11. The first heat sealing frame 21 is a U-shaped frame composed of a crossbar and two vertical bars. The ends of the two vertical bars of the first heat sealing frame 21 away from the crossbar are fixed to one end of the side wall of the conveying plate 12, and the length of the vertical bars is perpendicular to the side wall of the conveying plate 12. The length of the crossbar of the first heat sealing frame 21 is perpendicular to the length of the clamping plate 13. The third electric push rod 22 is located on the first heat sealing frame 21, on the side of the first heat sealing frame 21 away from the clamping plate 13. The push rod end of the third electric push rod 22 penetrates the crossbar of the first heat sealing frame 21 and is located between the two vertical bars of the first heat sealing frame 21. The second buffer plate 23 is arranged between the two vertical rods of the first heat sealing frame 21. The surface of the second buffer plate 23 is fixedly connected to the end of the push rod of the third electric push rod 22. The length direction of the second buffer plate 23 is perpendicular to the length direction of the clamping plate 13. First limiting grooves are provided on the opposite side walls of the two vertical rods of the first heat sealing frame 21. A first limiting member is processed and formed on the end surface of the second buffer plate 23. The first limiting member is adapted to the first limiting groove and is slidably arranged in the first limiting groove.

[0042] Combine Figure 1 and Figure 2The heat sealing assembly 2 also includes a heat sealing main splint 24 and a spring. The heat sealing main splint 24 is arranged on the side of the second buffer plate 23 away from the third electric push rod 22. The length direction of the heat sealing main splint 24 is parallel to the length direction of the second buffer plate 23, and the heat sealing main splint 24 and the second buffer plate 23 are spaced apart. A second sliding column 241 is processed and arranged on the plate surface opposite to the second buffer plate 23. The length direction of the second sliding column 241 is perpendicular to the plate surface of the heat sealing main splint 24. A receiving hole is opened at the corresponding position on the plate surface of the second buffer plate 23. The receiving hole The second buffer plate 23 connects the two surfaces. A second sliding post 241 fits within the receiving hole and slides through it. A second annular thickened portion 243 is formed on the end of the second sliding post 241's peripheral wall away from the main heat-sealing plate 24. This second annular thickened portion 243 prevents the main heat-sealing plate 24 from separating from the second buffer plate 23. A spring is disposed between the second buffer plate 23 and the main heat-sealing plate 24 and is sleeved onto the second sliding post 241. One end of the spring is affixed to the main heat-sealing plate 24, and the other end is affixed to the second buffer plate 23. A main heat-sealing blade 242 is disposed on the surface of the main heat-sealing plate 24 facing away from the second buffer plate 23. The main heat-sealing blade 242 fits within the heat-sealing opening 131.

[0043] Combine Figure 1 and Figure 2 The heat sealing assembly 2 further includes a second heat sealing frame 25, a fourth electric push rod 26, and a third buffer plate 27. The second heat sealing frame 25 is positioned on the side of the conveying plate 12 facing away from the first heat sealing frame 21 and between the two support legs 111 of the support frame 11. The second heat sealing frame 25 is a U-shaped frame composed of a crossbar and two vertical bars. The ends of the two vertical bars of the second heat sealing frame 25, away from the crossbar, are fixed to one end of the side wall of the conveying plate 12, and the length of the vertical bars is perpendicular to the side wall of the conveying plate 12. The second heat sealing frame 25 is fixed to the conveying plate 12 at the same location as the first heat sealing frame 21. The length of the crossbar of the second heat sealing frame 25 is perpendicular to the length of the clamping plate 13. The fourth electric push rod 26 is positioned on the second heat sealing frame 25, on the side of the second heat sealing frame 25 facing away from the clamping plate 13. The push rod end of the fourth electric push rod 26 penetrates the crossbar of the second heat sealing frame 25 and is located between the two vertical bars of the second heat sealing frame 25. The third buffer plate 27 is arranged between the two vertical rods of the second heat sealing frame 25. The surface of the third buffer plate 27 is fixedly connected to the end of the push rod of the fourth electric push rod 26. The length direction of the third buffer plate 27 is perpendicular to the length direction of the clamping plate 13. Second limiting grooves are provided on the opposite side walls of the two vertical rods of the second heat sealing frame 25. A second limiting member is processed and formed on the end surface of the third buffer plate 27. The second limiting member is adapted to the second limiting groove and is slidably arranged in the second limiting groove.

[0044] Combine Figure 1 and Figure 2The heat sealing assembly 2 also includes a heat sealing sub-ply plate 28 and a spring. The heat sealing sub-ply plate 28 is arranged on the side of the third buffer plate 27 away from the fourth electric push rod 26. The length direction of the heat sealing sub-ply plate 28 is parallel to the length direction of the third buffer plate 27, and the heat sealing sub-ply plate 28 and the third buffer plate 27 are spaced apart. A third sliding column 281 is processed and arranged on the plate surface opposite to the third buffer plate 27. The length direction of the third sliding column 281 is perpendicular to the plate surface of the heat sealing sub-ply plate 28. A receiving hole is opened at the corresponding position on the plate surface of the third buffer plate 27. The receiving hole The two surfaces of the third buffer plate 27 are connected, and the third sliding column 281 is adapted to the accommodating hole and slides through the accommodating hole. The end of the peripheral wall of the third sliding column 281 away from the heat sealing sub-splint 28 is processed to form a third annular thickened portion 283. The second annular thickened portion 243 can prevent the heat sealing sub-splint 28 from separating from the third buffer plate 27. A spring is arranged between the third buffer plate 27 and the heat sealing sub-splint 28. The spring is sleeved on the second sliding column 241. One end of the spring is fixed to the plate surface of the heat sealing sub-splint 28, and the other end is fixed to the plate surface of the third buffer plate 27. A heat sealing auxiliary hot knife 282 is provided on the plate surface of the heat sealing auxiliary clamping plate 28 facing away from the third buffer plate 27. The heat sealing auxiliary hot knife 282 is adapted to the heat sealing opening 131 and can be inserted into the heat sealing opening 131. The heat sealing main hot knife 242 and the heat sealing auxiliary hot knife 282 are arranged at intervals. The relative surfaces of the heat sealing main hot knife 242 and the heat sealing auxiliary hot knife 282 can be fitted together. When fitted together, the fitted surfaces of the heat sealing main hot knife 242 and the heat sealing auxiliary hot knife 282 are flush with the plate surface of the clamping plate 13 facing away from the support frame 11.

[0045] Combine Figure 1 and Figure 2 When heat sealing the plastic packaging bag, the clamping assembly 1 clamps the plastic packaging bag for transmission. When the heat sealing opening 131 is located between the main heat sealing knife 242 and the auxiliary heat sealing knife 282, the third electric push rod 22 and the fourth electric push rod 26 drive the main heat sealing knife 242 and the auxiliary heat sealing knife 282 to move closer to each other to heat seal the plastic packaging bag.

[0046] Combine Figure 1 and Figure 2 The heat sealing assembly 2 also includes a PLC processor 29, which is arranged on the side wall of the conveying plate 12 away from the support frame 11. The PLC processor 29 is far away from the first heat sealing frame 21. The PLC processor 29 is electrically connected to the first electric push rod 14, the second electric push rod 16, the third electric push rod 22 and the fourth electric push rod 26. The PLC processor 29 can control the electric push rods to work.

[0047] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A heat sealing device for plastic packaging bags, characterized by: The heat sealing device comprises a conveying plate (12), a clamping plate (13), a mounting frame (15), a second electric push rod (16), a first buffer plate (17), a pressure plate (18) and a heat sealing assembly (2), wherein the conveying plate (12) is provided with two pieces and is arranged opposite to each other, the clamping plate (13) is slidably arranged between the two conveying plates (12), a heat sealing opening (131) is provided on the surface of the clamping plate (13), the mounting frame (15) is arranged on the clamping plate (13) and is located between the two conveying plates (12) and the heat sealing opening (131) is provided on the surface of the clamping plate (13). ), the second electric push rod (16) is arranged on the side of the mounting frame (15) away from the clamping plate (13) and is fixed to the mounting frame (15), the push rod end of the second electric push rod (16) penetrates into the mounting frame (15) and is fixed to the first buffer plate (17), the pressing plate (18) is arranged between the first buffer plate (17) and the clamping plate (13), the pressing plate (18) is slidably connected to the first buffer plate (17), and the heat sealing component (2) is arranged on one side of the length direction of the conveying plate (12).

2. A heat sealing device for plastic packaging bags according to claim 1, characterized in that: Sliding grooves (121) are provided on the opposite surfaces of the two conveying plates (12), and a roller (132) is fixedly connected to the side wall of the clamping plate (13), and the roller (132) is adapted to the sliding groove (121) and is slidably arranged in the sliding groove (121). The heat sealing device also includes a first electric push rod (14), which is fixedly arranged on the side wall of the push plate, and the push rod of the first electric push rod (14) is connected to the side wall of the clamping plate (13) through a connecting rod.

3. A heat sealing device for plastic packaging bags according to claim 2, characterized in that: The first buffer plate (17) is provided with a receiving hole, and the pressure plate (18) is provided with a first sliding column (181) on the plate surface opposite to the first buffer plate (17). The first sliding column (181) is adapted to the receiving hole and slides through the receiving hole. The heat sealing assembly (2) also includes a spring, which is provided between the first buffer plate (17) and the pressure plate (18), and is sleeved on the first sliding column (181).

4. A heat sealing device for plastic packaging bags according to claim 3, characterized in that: A first annular thickened portion (182) is formed on one end of the sliding column peripheral wall away from the pressure plate (18).

5. The heat sealing device for plastic packaging bags according to claim 1, characterized in that: The heat sealing assembly (2) comprises a first heat sealing frame (21), a third electric push rod (22), a second buffer plate (23), a main heat sealing splint (24) and a main heat sealing knife (242); the first heat sealing frame (21) is arranged on one side of the length direction of the conveying plate (12) and is fixedly connected to the side wall of the conveying plate (12); the third electric push rod (22) is arranged on the side of the first heat sealing frame (21) away from the conveying plate (12) and is fixedly connected to the first heat sealing frame (21); the push rod of the third electric push rod (22) penetrates the first heat sealing frame (21) and is fixedly connected to the second buffer plate (23); the main heat sealing splint (24) is arranged on the side of the second buffer plate (23) away from the third electric push rod (22); the main heat sealing splint (24) is slidably connected to the second buffer plate (23); and the main heat sealing knife (242) is fixedly arranged on the plate surface of the main heat sealing splint (24) away from the second buffer plate (23).

6. The heat sealing device for plastic packaging bags according to claim 5, characterized in that: The second buffer plate (23) is provided with a receiving hole, and the heat sealing main plate (24) is provided with a second sliding column (241) on the plate surface opposite to the second buffer plate (23). The second sliding column (241) is adapted to the receiving hole and slides through the receiving hole. The heat sealing assembly (2) also includes a spring, which is provided between the second buffer plate (23) and the heat sealing main plate (24), and is sleeved on the second sliding column (241).

7. The heat sealing device for plastic packaging bags according to claim 6, characterized in that: The first heat sealing frame (21) is a U-shaped frame composed of a horizontal rod and two vertical rods, and the opposite side walls of the two vertical rods are provided with a first limiting groove. The end surface of the second buffer plate (23) is provided with a first limiting piece, and the first limiting piece is adapted to the first limiting groove and is slidably arranged in the first limiting groove.

8. The heat sealing device for plastic packaging bags according to claim 7, characterized in that: The heat sealing assembly (2) further comprises a second heat sealing frame (25), a fourth electric push rod (26), a third buffer plate (27), a heat sealing auxiliary clamping plate (28) and a heat sealing auxiliary hot knife (282), wherein the second heat sealing frame (25) is arranged on the side of the conveying plate (12) away from the first heat sealing frame (21) and is fixedly connected to the side wall of the conveying plate (12), and the fourth electric push rod (26) is arranged on the side of the second heat sealing frame (25) away from the conveying plate (12) and is fixedly connected to the second heat sealing frame (25). The heat sealing frame (25) is fixed, the push rod of the fourth electric push rod (26) penetrates the second heat sealing frame (25) and is fixed to the third buffer plate (27), the heat sealing auxiliary clamping plate (28) is arranged on the side of the third buffer plate (27) away from the fourth electric push rod (26), the heat sealing auxiliary clamping plate (28) is slidably connected to the third buffer plate (27), and the heat sealing auxiliary ironing knife (282) is fixedly arranged on the plate surface of the heat sealing auxiliary clamping plate (28) away from the third buffer plate (27).

9. The heat sealing device for plastic packaging bags according to claim 8, characterized in that: The third buffer plate (27) is provided with a receiving hole, and the heat sealing sub-clamping plate (28) is provided with a third sliding column (281) on the plate surface opposite to the third buffer plate (27). The third sliding column (281) is adapted to the receiving hole and slides through the receiving hole. The heat sealing assembly (2) also includes a spring, which is provided between the third buffer plate (27) and the heat sealing sub-clamping plate (28), and the spring is sleeved on the third sliding column (281).

10. The heat sealing device for plastic packaging bags according to claim 9, characterized in that: The second heat sealing frame (25) is a U-shaped frame composed of a horizontal rod and two vertical rods, and the side walls opposite to each other of the two vertical rods are provided with a second limiting groove. The end surface of the third buffer plate (27) is provided with a second limiting piece, and the second limiting piece is adapted to the second limiting groove and is slidably arranged in the second limiting groove.

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