Heat sealing mechanism for plastic bag production

Abstract

The utility model relates to the technical field of plastic bag production, and provides a heat sealing mechanism for plastic bag production, the heat sealing mechanism comprises a heat sealing assembly and an adjusting assembly which are arranged on a rack, the heat sealing assembly comprises a base arranged on the rack, a hot pressing block arranged above the base and a first driving part for driving the hot pressing block to move in the direction of the base, a space for a plastic bag to penetrate through is reserved between the base and the hot pressing plate; the two mounting plates are arranged on the two sides of the rack correspondingly, the guide rod is arranged between the two mounting plates, the lead screw penetrates through the mounting plates and the base in a threaded mode, the second driving part drives the lead screw to rotate, and the length direction of the guide rod and the length direction of the lead screw are parallel to the width direction of the rack. The two ends of the guide rod are connected to the two mounting plates correspondingly. The heat sealing mechanism has the beneficial effect that the universality and applicability of the heat sealing mechanism are improved.

Description

Technical Field

[0001] This application relates to the technical field of plastic bag production, and in particular to a heat sealing mechanism for plastic bag production. Background Technology

[0002] Plastic bags, as a common packaging material, are widely used in daily life and industrial production. With the diversification of packaging needs, the requirements for the toughness, sealing performance, and other properties of plastic bags are becoming increasingly stringent. Currently, heat-sealing technology in the plastic bag production process is one of the key factors determining the performance of plastic bags. The quality of the heat-sealing technology directly affects the sealing strength, durability, and appearance quality of the plastic bag. Plastic bags with zippers, due to their reusable nature, have even higher manufacturing requirements; the heat-sealing quality between the zipper and the bag body, and at both ends of the zipper, directly affects the quality of the plastic bag.

[0003] In existing technologies, heat sealing mechanisms are typically fixed to one side of the frame to heat seal plastic bags, and the types of plastic bags that can be processed are relatively limited, thus requiring further improvement. Utility Model Content

[0004] To address the above problems, this application provides a heat-sealing mechanism for plastic bag production.

[0005] This application provides a heat-sealing mechanism for plastic bag production, which adopts the following technical solution:

[0006] A heat-sealing mechanism for producing plastic bags includes a heat-sealing assembly and an adjusting assembly mounted on a frame. The heat-sealing assembly includes a base mounted on the frame, a hot press block mounted above the base, and a first driving member that drives the hot press block to move toward the base. A space is provided between the base and the hot press block for the plastic bag to pass through. The adjusting assembly includes two mounting plates respectively mounted on both sides of the frame, a guide rod disposed between the two mounting plates, a lead screw threaded through the mounting plates and the base, and a second driving member that drives the lead screw to rotate. The length direction of the guide rod and the lead screw is parallel to the width direction of the frame, and the two ends of the guide rod are respectively connected to the two mounting plates.

[0007] By adopting the above technical solution, the adjustment component can drive the lead screw to rotate through the second drive component, so that the base moves along the guide rod in the width direction of the frame, thereby adjusting the heat sealing position to suit the production of plastic bags of different specifications, and improving the versatility and applicability of the heat sealing mechanism.

[0008] Preferably, the two mounting plates are a first mounting plate and a second mounting plate. The heat sealing assembly is disposed close to the first mounting plate. A guide plate is disposed between the heat sealing assembly and the second mounting plate. The guide plate is located below the plastic bag. The length direction of the guide plate is parallel to the width direction of the frame. The guide plate has guide surfaces on both sides along its length direction.

[0009] By adopting the above technical solution, a guide plate is set and positioned below the plastic bag with its length direction parallel to the width direction of the frame. At the same time, guide surfaces are provided on both sides of the guide plate along its length direction. This can guide the plastic bag during the conveying process, allowing the plastic bag to smoothly enter the heat sealing assembly for heat sealing, thereby improving heat sealing efficiency and quality.

[0010] Preferably, the guide rod passes through the guide plate, and there are two guide rods spaced apart along the width direction of the guide plate. A connector is provided between the guide plate and the base, and the guide plate can move with the base.

[0011] By adopting the above technical solution, guide rods are inserted through the guide plate and two are spaced apart along the width of the guide plate. The guide plate and the base are connected by a connector. The guide plate can move together with the base, ensuring that when the position of the heat sealing component is adjusted to meet the heat sealing requirements of different sized plastic bags, the guide plate can be adjusted synchronously, so that the guide plate can continuously play a stable guiding role for the plastic bag, ensuring that the plastic bag accurately reaches the heat sealing position, improving the heat sealing quality and production efficiency.

[0012] Preferably, the second driving component includes a handwheel, and the lead screw is threaded with a nut, wherein at least two nuts are provided and respectively abut against opposite sides of the first mounting plate.

[0013] By adopting the above technical solution, the handwheel drives the lead screw to rotate, which in turn moves the base along the lead screw, thereby adjusting the position of the heat sealing component and enabling the processing of plastic bags of different specifications. At least two nuts are respectively abutted against the opposite sides of the first mounting plate, which can play a positioning role, ensure the stability of the lead screw position, and improve the stability of the heat sealing mechanism in adjustment and operation.

[0014] Preferably, the lower surface of the hot press block is provided with toothed grooves.

[0015] By adopting the above technical solution, a toothed groove is set on the lower surface of the hot press block, which can enhance the force on the plastic bag during heat sealing, so that the plastic bag can be heat sealed better, improve the heat sealing effect of the plastic bag, and thus improve the sealing strength, durability and appearance quality of the plastic bag.

[0016] Preferably, the heat sealing assembly further includes a mounting bracket disposed on the base, the mounting bracket including a vertical plate perpendicular to the base and a horizontal plate perpendicular to the vertical plate, the heat pressing block being disposed on the lower surface of the horizontal plate, and the first driving component including a pneumatic cylinder disposed on the upper surface of the horizontal plate; the base includes a first base connected to the vertical plate and a second base disposed on the upper surface of the first base, the first base being provided with a sliding plate for the guide rod and the lead screw to pass through, and the second base being disposed correspondingly to the heat pressing block.

[0017] By adopting the above technical solution, the hot pressing block is driven by a pneumatic cylinder to achieve heat sealing of the plastic bag. The base is clearly divided into a first base and a second base and a sliding plate is set to facilitate the guide rod and screw to work in coordination with the adjustment component, which can adapt to the production of plastic bags of different specifications.

[0018] Preferably, the first driving component further includes a first rack disposed on the side of the hot press block, a second rack disposed on the side wall of the second base, and a gear disposed between the first rack and the second rack. The gear is rotatably connected to the vertical plate and meshes with the first rack and the second rack. The second base is slidably connected to the vertical plate.

[0019] By adopting the above technical solution, since the second base is fixedly installed, leaving a gap between the second base and the plastic bag to facilitate bag insertion can cause some pulling on the plastic bag when the hot pressing block descends, thus affecting the heat sealing effect of the plastic bag. To address this, the first rack is positioned on the side of the hot pressing block near the vertical plate. Driven by the first driving component, the gears mesh with the first and second racks, causing the lower second base and the upper hot pressing block to move in opposite directions, thereby improving the heat pressing effect.

[0020] Preferably, the first driving component further includes a pulley disposed on the lower surface of the horizontal plate and a steel strip passing through the pulley. The length direction of the pulley is parallel to the length direction of the mounting plate, and the two ends of the steel strip are respectively connected to the hot pressing block and the side of the second base near the vertical plate.

[0021] By adopting the above technical solution, when the heat sealing mechanism is working, the hot pressing block is driven by a pneumatic cylinder to move towards the base for heat sealing operation. The setting of pulleys and steel belts makes the movement of the hot pressing block more stable and smooth, and can ensure the relative positional relationship between the hot pressing block and the second base during the movement process, thereby improving the heat sealing quality and stability.

[0022] In summary, this utility model has the following beneficial effects:

[0023] 1. By setting an adjustment component, the heat sealing component can be moved along the width of the frame, which can adapt to heat sealing of plastic bags of different specifications, thus solving the problem that the existing heat sealing mechanism can only process plastic bags of a single specification;

[0024] 2. The drive hot press block in the heat sealing assembly moves towards the base to perform heat sealing on the plastic bag, improving the sealing strength, durability, and appearance quality of the plastic bag;

[0025] 3. A guide plate is installed between the heat sealing assembly and the second mounting plate to guide the plastic bag and help improve the heat sealing quality. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0027] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0028] Figure 3 This is a schematic diagram of the guide plate structure in Embodiment 1 of this application;

[0029] Figure 4 This is a schematic diagram of the structure of the first driving component in Embodiment 2 of this application;

[0030] Figure 5 This is a side view of the first driving component in Embodiment 3 of this application;

[0031] Figure 6 This is a front view structural diagram of the first driving component in Embodiment 3 of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Heat sealing assembly; 21. Base; 211. First base; 212. Second base; 22. Mounting bracket; 221. Vertical plate; 222. Horizontal plate; 223. Connecting rod; 23. Heat pressing block; 24. First driving component; 241. Pneumatic cylinder; 242. First rack; 243. Second rack; 244. Gear; 245. Pulley; 246. Steel belt; 3. Adjusting assembly; 31. Mounting plate; 311. First mounting plate; 312. Second mounting plate; 32. Guide rod; 33. Lead screw; 331. Nut; 34. Second driving component; 4. Guide plate; 41. Guide surface. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail below.

[0034] This application discloses a heat-sealing mechanism for producing plastic bags.

[0035] Example 1:

[0036] A heat-sealing mechanism for producing plastic bags, as described above. Figure 1 , Figure 2 It includes a heat sealing assembly 2 and an adjustment assembly 3 mounted on the frame 1.

[0037] The heat sealer is specifically located near one side of the frame 1. The heat sealer assembly 2 specifically includes a base 21 that can move along the width direction of the frame 1, a mounting bracket 22 disposed on the base 21, a hot press block 23 disposed above the base 21, and a first drive member 24 that drives the hot press block 23 to move toward the base 21.

[0038] The base 21 specifically includes a first base 211 mounted to the adjustment assembly 3 and a second base 212 fixedly connected to the upper surface of the first base 211. The mounting bracket 22 specifically includes a vertical plate 221 perpendicular to the base 21, a horizontal plate 222 perpendicular to the vertical plate 221, and a connecting rod 223 connecting the side walls of the vertical plate 221 and the horizontal plate 222. The lower surface of the hot pressing block 23 is provided with a toothed groove. The hot pressing block 23 is disposed on the lower surface of the horizontal plate 222 and is positioned opposite to the second base 212. A space is left between the second base 212 and the hot pressing plate for the plastic bag to pass through. The first driving component 24 is specifically a pneumatic cylinder 241. The pneumatic cylinder 241 is fixedly connected to the upper surface of the horizontal plate 222, and the piston rod of the pneumatic cylinder 241 passes through the horizontal plate 222 to be fixedly connected to the hot pressing block 23.

[0039] The adjustment component 3 specifically includes two mounting plates 31 fixedly connected to both sides of the frame 1, a guide rod 32 disposed between the two mounting plates 31, a lead screw 33 threaded through the mounting plate 31 and the base 21, and a second driving component 34 for driving the lead screw 33 to rotate. In this embodiment, the length direction of the guide rod 32 and the lead screw 33 is parallel to the width direction of the frame 1. There are two guide rods 32, which are spaced apart along the width direction of the guide plate 4. The two ends of the guide rod 32 are fixedly connected to the two mounting plates 31 respectively. A sliding plate is disposed on the upper surface of the first base 211. The guide rod 32 passes through the sliding plate, and the lead screw 33 also passes through the sliding plate.

[0040] The two mounting plates 31 are the first mounting plate 311 and the second mounting plate 312, respectively. The heat sealing assembly 2 is set close to the first mounting plate 311. The lead screw 33 can be inserted only through the first sliding plate and the first mounting plate 311, or it can be inserted through both mounting plates 31, depending on the requirements.

[0041] Reference Figure 2 , Figure 3 A guide plate 4 is provided between the heat-sealing assembly 2 and the second mounting plate 312. The guide plate 4 is located below the plastic bag, and its upper surface abuts against the lower surface of the plastic bag. In this embodiment, the length direction of the guide plate 4 is parallel to the width direction of the frame 1, and guide surfaces 41 are provided on both sides of the guide plate 4 along its length. A guide rod 32 passes through the guide plate 4, and a connector, specifically a connecting plate, is provided between the guide plate 4 and the first base 211. The connecting plate is used to connect the guide plate 4 and the first base 211, so that the guide plate 4 can move with the base 21.

[0042] The second driving component 34 may specifically include a handwheel, in which case a nut 331 is threaded onto the lead screw 33, and at least two nuts 331 are provided, each abutting against opposite sides of the first mounting plate 311. Alternatively, it may be a drive motor fixedly connected to the first mounting plate 311, which drives the lead screw 33 to rotate.

[0043] The implementation principle of a heat-sealing mechanism for plastic bag production in this application embodiment is as follows: according to the width of the plastic bag, the handwheel is rotated to drive the lead screw 33 to rotate, so that the base 21 moves along the guide rod 32 in the width direction of the frame 1, thereby adjusting the heat-sealing position to be suitable for the production of plastic bags of different specifications, thus improving the versatility and applicability of the heat-sealing mechanism.

[0044] Example 2:

[0045] Reference Figure 4 The difference from Embodiment 1 is that the first driving member 24 further includes a first rack 242 fixedly connected to the side of the hot press block 23, a second rack 243 fixedly connected to the side wall of the second base 212, and a gear 244 disposed between the first rack 242 and the second rack 243. The gear 244 is rotatably connected to the vertical plate 221 and meshes with the first rack 242 and the second rack 243. The second base 212 is slidably connected to the vertical plate 221.

[0046] Example 3:

[0047] Reference Figure 5 , Figure 6 The difference from Embodiment 1 is that the first driving member 24 further includes a pulley 245 rotatably connected to the lower surface of the horizontal plate 222 and a steel belt 246 passing through the pulley 245. The pulley 245 is disposed between the vertical plate 221 and the hot pressing block 23. The length direction of the pulley 245 is parallel to the length direction of the mounting plate 31. The two ends of the steel belt 246 are respectively connected to the hot pressing block 23 and the side of the second base 212 near the vertical plate 221.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A heat-sealing mechanism for producing plastic bags, characterized in that: The assembly includes a heat sealing component (2) and an adjustment component (3) mounted on a frame (1). The heat sealing component (2) includes a base (21) mounted on the frame (1), a hot press block (23) mounted above the base (21), and a first drive component (24) that drives the hot press block (23) to move toward the base (21). There is a space between the base (21) and the hot press block for inserting a plastic bag. The adjustment component (3) includes two mounting plates (31) mounted on both sides of the frame (1), a guide rod (32) mounted between the two mounting plates (31), a screw rod (33) threaded through the mounting plate (31) and the base (21), and a second drive component (34) that drives the screw rod (33) to rotate. The length direction of the guide rod (32) and the screw rod (33) is parallel to the width direction of the frame (1). The two ends of the guide rod (32) are connected to the two mounting plates (31) respectively.

2. The heat-sealing mechanism for producing plastic bags according to claim 1, characterized in that: The two mounting plates (31) are a first mounting plate (311) and a second mounting plate (312), respectively. The heat sealing assembly (2) is located close to the first mounting plate (311). A guide plate (4) is provided between the heat sealing assembly (2) and the second mounting plate (312). The guide plate (4) is located below the plastic bag. The length direction of the guide plate (4) is parallel to the width direction of the frame (1). The guide plate (4) has guide surfaces (41) on both sides along its length direction.

3. The heat-sealing mechanism for producing plastic bags according to claim 2, characterized in that: The guide rod (32) passes through the guide plate (4). There are two guide rods (32) and they are spaced apart along the width direction of the guide plate (4). A connector is provided between the guide plate (4) and the base (21). The guide plate (4) can move with the base (21).

4. The heat-sealing mechanism for producing plastic bags according to claim 2, characterized in that: The second drive unit (34) includes a handwheel, and the lead screw (33) is threaded with a nut (331). At least two nuts (331) are provided and abut against opposite sides of the first mounting plate (311).

5. The heat-sealing mechanism for producing plastic bags according to claim 1, characterized in that: The lower surface of the hot press block (23) is provided with toothed grooves.

6. The heat-sealing mechanism for producing plastic bags according to claim 1, characterized in that: The heat sealing assembly (2) further includes a mounting bracket (22) disposed on the base (21). The mounting bracket (22) includes a vertical plate (221) disposed perpendicular to the base (21) and a horizontal plate (222) disposed perpendicular to the vertical plate (221). The heat pressing block (23) is disposed on the lower surface of the horizontal plate (222). The first driving member (24) includes a pneumatic cylinder (241) disposed on the upper surface of the horizontal plate (222). The base (21) includes a first base (211) connected to the vertical plate (221) and a second base (212) disposed on the upper surface of the first base (211). The first base (211) is provided with a sliding plate for the guide rod (32) and the lead screw (33) to pass through. The second base (212) is disposed correspondingly to the heat pressing block (23).

7. A heat-sealing mechanism for producing plastic bags according to claim 6, characterized in that: The first driving member (24) further includes a first rack (242) disposed on the side of the hot press block (23), a second rack (243) disposed on the side wall of the second base (212), and a gear (244) disposed between the first rack (242) and the second rack (243). The gear (244) is rotatably connected to the vertical plate (221), and the gear (244) meshes with the first rack (242) and the second rack (243). The second base (212) is slidably connected to the vertical plate (221).

8. A heat-sealing mechanism for producing plastic bags according to claim 6, characterized in that: The first driving member (24) further includes a pulley (245) disposed on the lower surface of the horizontal plate (222) and a steel strip (246) passing through the pulley (245). The length direction of the pulley (245) is parallel to the length direction of the mounting plate (31). The two ends of the steel strip (246) are respectively connected to the hot press block (23) and the side of the second base (212) near the vertical plate (221).

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