Tandem type film clamping device of gypsum board wrapping film packaging machine

Abstract

The invention belongs to the technical field of plasterboard processing, and discloses a tandem type film clamping device of a plasterboard wrapping film packaging machine, which comprises a first conveying chain plate, a second conveying chain plate, a third conveying chain plate, a fourth conveying chain plate and a fifth conveying chain plate, the film feeding assembly is provided with an annular mounting frame and a rotating support arranged on one side of the annular mounting frame; the film clamping assembly is arranged below the first conveying chain plate; the film clamping assembly is provided with a plurality of cylindrical clamping blocks which are arranged in parallel in the gypsum board conveying direction, and a gap is formed between every two adjacent cylindrical clamping blocks; the film clamping driving assembly is arranged on one side of the film clamping assembly and used for driving all the cylindrical clamping blocks to get close to each other; the reset assembly is used for driving each cylindrical clamping block to reset and restore the distance so as to release the free end of the thin film, the cylindrical clamping blocks get close to each other to clamp the thin film, multi-point synchronous clamping is carried out on the free end of the thin film in the whole width direction, and the clamping precision of the thin film is improved. And mechanical extrusion type clamping has low requirements on the thin film, and the thin film is firmer in the clamping process.

Description

Technical Field

[0001] This invention relates to the field of gypsum board processing technology, and more specifically to a series clamping device for a gypsum board stretch film packaging machine. Background Technology

[0002] Before gypsum board leaves the factory, a protective film is usually wrapped around its surface to facilitate subsequent overall packaging and transportation. Existing stretch wrapping machines typically fix the free end of the film before starting to wrap it to prevent the free end from rotating with the packaging machine, which could cause the wrapping action to fail.

[0003] Currently, the most common method for fixing the free end of a thin film is vacuum adsorption. This involves using a vacuum generator to provide a vacuum environment and using a vacuum suction cup connected to the vacuum generator to adsorb the free end of the thin film, thus keeping the free end of the film fixed before winding begins.

[0004] However, the vacuum adsorption structure is greatly affected by the surface condition of the film. When the film has wrinkles, minor damage, rough surface or dust, it is difficult to form a reliable seal between the vacuum suction cup and the film, resulting in a significant decrease in adsorption force and insufficient fixation. Summary of the Invention

[0005] To address this issue, the present invention provides a series-type film clamping device for a gypsum board wrapping machine, which solves the technical problem that the existing vacuum adsorption structure is greatly affected by the surface condition of the film. When the film has wrinkles, minor damage, rough surface, or is dusty, the adsorption force decreases significantly and the fixation is insufficient.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0007] A series clamping device for a gypsum board stretch film packaging machine, comprising:

[0008] The first conveyor chain plate is used to transport stacked gypsum boards;

[0009] The film feeding assembly includes an annular mounting frame and a rotating bracket disposed on one side of the annular mounting frame. The first conveyor chain plate drives the gypsum board to pass through the inside of the annular mounting frame, and the rotating bracket can drive the rolled film to rotate around the annular mounting frame to circumferentially wind the passing gypsum board.

[0010] A film clamping assembly is disposed below the first conveyor chain plate and above the inner side of the bottom of the annular mounting frame. The film clamping assembly is used to clamp the free end of the rolled film so that the rotating bracket drives the rolled film to rotate and wind it.

[0011] The membrane clamping assembly has multiple cylindrical clamping blocks arranged in parallel along the gypsum board transport direction, with a spacing between adjacent cylindrical clamping blocks, and the cylindrical clamping blocks can move towards each other in the horizontal direction when subjected to force.

[0012] In the initial state, the free end of the rolled film is pulled by external force, and the rotating bracket drives the rolled film to pass around the bottom of the annular mounting frame. The unfolded film is tightly attached to the bottom of each cylindrical clamping block. Each cylindrical clamping block is brought closer to each other by external force and clamps the film along the width direction of the film. The rotating bracket continues to drive the rolled film to wrap around the gypsum board.

[0013] A clamping drive assembly is disposed on one side of the clamping assembly and is used to drive each of the cylindrical clamping blocks to move closer to each other;

[0014] A reset assembly is provided between each adjacent cylindrical clamping block. After the gypsum board is wound, the clamping drive assembly releases the force, and the reset assembly drives each cylindrical clamping block to reset and restore the spacing, thereby releasing the free end of the film.

[0015] Furthermore, a second conveyor chain plate is provided downstream of the first conveyor chain plate along the gypsum board transport direction, and the second conveyor chain plate is used to receive the gypsum board conveyed by the first conveyor chain plate.

[0016] A gap is provided between the first conveyor chain plate and the second conveyor chain plate;

[0017] As the plasterboard is conveyed to the second conveyor chain, the plasterboard pulls each layer of film wrapped around the bottom of the cylindrical clamping block through the gap and detaches it from the first conveyor chain.

[0018] Furthermore, it also includes multiple mounting rods arranged in a rectangular row at the bottom of the first conveyor chain plate, each of which is arranged along the gypsum board transport direction;

[0019] Each cylindrical clamping block is provided with multiple mounting holes, and each mounting hole corresponds to a mounting rod. The cylindrical clamping blocks are mounted side by side on the mounting rod through the mounting holes.

[0020] A limiting plate is fixedly installed at one end of the mounting rod. The limiting plate is used to prevent the cylindrical clamping block from falling off the mounting rod when the clamping drive assembly applies force to the cylindrical clamping block.

[0021] Furthermore, the membrane clamping drive assembly is disposed on the side of the mounting rod away from the limiting plate;

[0022] The membrane clamping drive assembly includes a drive plate, a drive rod, and a first drive cylinder;

[0023] The drive plate is located on the outside of the cylindrical clamping block, away from the limiting plate;

[0024] One end of the drive rod is connected to the side of the drive plate away from the cylindrical clamping block, and the other end is connected to the drive end of the first drive cylinder.

[0025] The first driving cylinder drives the driving rod to move closer to the cylindrical clamping block, and the driving rod drives the driving plate to move, so as to squeeze the cylindrical clamping blocks closer to each other and make them stick together.

[0026] Furthermore, the reset assembly includes a reset spring;

[0027] One end of the reset spring is connected to the side wall of one of the cylindrical clamping blocks, and the other end is connected to the side wall of the other cylindrical clamping block.

[0028] When the cylindrical clamping blocks approach each other, the return spring is compressed and stores elastic potential energy. When the external force on the cylindrical clamping blocks is released, the return spring releases the elastic potential energy and pushes the cylindrical clamping blocks away from each other.

[0029] Furthermore, it also includes thermomelted welded joints;

[0030] The hot melt welding head is located below the first conveyor chain plate and on one side of the cylindrical clamping blocks arranged in parallel. The hot melt welding head is used to heat and weld the thin film layer wrapped around the bottom of the cylindrical clamping block when the gypsum board is finished winding.

[0031] Furthermore, the hot melt welding head is arranged along the gypsum board transport direction, and the length of the hot melt welding head is greater than or equal to the width of the film. The hot melt welding head can generate heat when energized to weld the film layer.

[0032] In the initial state, the hot melt welding head is located upstream of the parallel cylindrical clamping blocks along the gypsum board transport direction and below the cylindrical clamping blocks. During the welding operation, the hot melt welding head moves towards the cylindrical clamping blocks and moves upward to abut against the thin film layer at the bottom of the cylindrical clamping blocks.

[0033] Furthermore, it also includes heating wire;

[0034] The heating wire is positioned below the first conveyor chain plate and on the same side as the hot melt welding head. The film cutting assembly is used to cut the outer film after the film layer welding is completed, so as to separate the film wrapped on the gypsum board from the rolled film.

[0035] Furthermore, the heating wire is arranged along the transport direction of the gypsum board, and the length of the heating wire is greater than or equal to the width of the film. The heating wire can generate heat when energized to cut the outer film.

[0036] In the initial state, the heating wire is located upstream of the parallel cylindrical clamping blocks along the gypsum board transport direction and below the cylindrical clamping blocks. During the cutting operation, the heating wire moves towards the cylindrical clamping blocks and moves upward to cut the outer film at the bottom of the cylindrical clamping blocks.

[0037] Furthermore, it also includes displacement driving components;

[0038] The displacement driving component is located below the first conveyor chain plate and is connected to the hot melt welding head and the heating wire. The displacement driving component is used to drive the hot melt welding head and the heating wire to move forward and then upward toward the cylindrical clamping block.

[0039] The heating action of the hot melt welding head and the heating wire can be controlled independently.

[0040] Compared with the prior art, the present invention has the following advantages:

[0041] This invention uses cylindrical clamping blocks to clamp the film close to each other. Multiple cylindrical clamping blocks are arranged side by side along the gypsum board transport direction, which can clamp the film at multiple points synchronously along the entire width of the free end of the film. This makes the film more uniform and stable under force. In addition, the clamping blocks adopt a cylindrical structure, and the arc structure on its surface can better fit the film, which is more conducive to clamping. Mechanical extrusion clamping has lower requirements for the film itself and is more secure during the clamping process. Attached Figure Description

[0042] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0043] Figure 1 This is a side view of a series clamping device for a gypsum board stretch film packaging machine according to an embodiment of the present invention.

[0044] Figure 2 This is a schematic diagram of the overall structure of the film clamping assembly and the film clamping drive assembly in an embodiment of the present invention;

[0045] Figure 3 This is a front view structural diagram of a series clamping device for a gypsum board stretch film packaging machine provided in an embodiment of the present invention.

[0046] The labels in the diagram represent the following:

[0047] 1. First conveyor chain plate; 2. Gypsum board; 3. Film feeding assembly; 4. Rolled film; 5. Cylindrical clamping block; 6. Second conveyor chain plate; 7. Film clamping drive assembly; 8. Spacer; 9. Mounting rod; 10. Limiting plate; 11. Return spring; 12. Hot melt welding head; 13. Heating wire; 14. Second drive cylinder; 15. Third drive cylinder; 16. Insulating seat;

[0048] 301. Circular mounting bracket; 302. Rotating bracket;

[0049] 701. Drive plate; 702. Drive rod; 703. First drive cylinder. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention provides a series clamping device for a gypsum board stretch film packaging machine, comprising:

[0052] The first conveyor chain plate 1 is used to transport gypsum boards 2 stacked into piles;

[0053] The film feeding assembly 3 includes an annular mounting frame 301 and a rotating bracket 302 disposed on one side of the annular mounting frame 301. The first conveyor chain plate 1 drives the gypsum board 2 to pass through the inside of the annular mounting frame 301. The rotating bracket 302 can drive the rolled film 4 to rotate around the annular mounting frame 301 to circumferentially wind the passing gypsum board 2.

[0054] The film clamping assembly is located below the first conveyor chain plate 1 and above the bottom inner side of the annular mounting frame 301. The film clamping assembly is used to clamp the free end of the rolled film 4 so that the rotating bracket 302 drives the rolled film 4 to rotate and wind it.

[0055] The membrane assembly has multiple cylindrical clamping blocks 5 arranged in parallel along the transport direction of the gypsum board 2, with a gap between adjacent cylindrical clamping blocks 5, and the cylindrical clamping blocks 5 can move towards each other in the horizontal direction when subjected to force.

[0056] In the initial state, the free end of the rolled film 4 is pulled by external force, and the rotating bracket 302 drives the rolled film 4 to pass around the bottom of the annular mounting frame 301. The unfolded film is tightly attached to the bottom of each cylindrical clamping block 5. Each cylindrical clamping block 5 is brought closer to each other by external force and clamps the film along the width direction of the film. The rotating bracket 302 continues to drive the rolled film 4 to wrap around the gypsum board 2.

[0057] A membrane clamping drive assembly 7 is disposed on one side of the membrane clamping assembly and is used to drive each cylindrical clamping block 5 to move closer to each other.

[0058] A reset component is provided between each adjacent cylindrical clamping block 5. After the gypsum board 2 is wound, the clamping drive component 7 releases the force, and the reset component drives each cylindrical clamping block 5 to reset and restore the spacing, so as to release the free end of the film.

[0059] This invention uses cylindrical clamping blocks 5 to clamp the film close to each other. Multiple cylindrical clamping blocks 5 are arranged side by side along the transport direction of the gypsum board 2, which can clamp the film at multiple points synchronously along the entire width of the free end of the film, making the film more uniform and stable under force. In addition, the clamping blocks adopt a cylindrical structure, and the arc structure on its surface can better fit the film, which is more conducive to clamping. Mechanical extrusion clamping has lower requirements for the film itself and is more secure during the clamping process.

[0060] This invention provides a series clamping device for a gypsum board wrapping machine. It mainly addresses the problem of unstable fixation and easy slippage of the free end of the gypsum board wrapping film during the initial wrapping stage, and proposes a clamping technology with simple structure, reliable clamping and strong adaptability.

[0061] Specifically, by setting multiple cylindrical clamping blocks 5 arranged in parallel along the transport direction of gypsum board 2, and cooperating with the film clamping drive assembly 7 and the reset assembly, the free end of the film can be stably clamped before winding begins and reliably positioned during the winding process. The clamping blocks adopt a cylindrical structure, which can form uniform line contact or surface contact when clamping, effectively avoiding damage to the film. At the same time, the cylindrical clamping blocks 5 can automatically restore the spacing under the action of the reset assembly, realizing the rapid release of the free end of the film. This invention is not affected by wrinkles, dust or minor damage on the film surface, significantly improving the stability and reliability of the winding process, and is suitable for high-speed automated gypsum board 2 packaging production line.

[0062] One end of the rolled film 4 is clamped and fixed by the film clamping assembly, and moves in a circle around the annular mounting frame 301 with the rotating bracket 302. The rolled film 4 can be freely rotated around its own axis and assembled on the rotating bracket 302, so that it can rotate around its own axis synchronously to continuously release the film while following the rotation of the rotating bracket 302, thus meeting the circumferential winding requirements of the gypsum board 2.

[0063] Before the winding operation, the rolled film 4 is first installed on the rotating bracket 302. Then, the free end of the rolled film 4 is manually pulled so that the rolled film 4 follows the rotating bracket 302 around the bottom of the cylindrical clamping block 5 and the unfolded film is attached to the clamping surface of the cylindrical clamping block 5. Then, the film clamping drive assembly 7 drives the cylindrical clamping block 5 to clamp the free end. Thus, in the initial state, the free end of the film is provided with initial tension for the smooth unfolding of the rolled film 4 as it rotates with the rotating bracket 302 by external force (manual pulling).

[0064] During the wrapping process of gypsum board 2, after the free end of the film is fixed, with the winding action of the rotating bracket 302, the film will wrap the gypsum board 2, the first conveyor chain plate 1, and the cylindrical clamping block 5 together. In order to separate the film layer from the first conveyor chain plate 1 and the cylindrical clamping block 5, a second conveyor chain plate 6 is provided downstream of the first conveyor chain plate 1 along the transport direction of gypsum board 2. The second conveyor chain plate 6 is used to receive the gypsum board 2 conveyed by the first conveyor chain plate 1.

[0065] A gap 8 is provided between the first conveyor chain plate 1 and the second conveyor chain plate 6;

[0066] As the plasterboard 2 is conveyed to the second conveyor chain plate 6, the plasterboard 2 pulls each layer of film wrapped around the bottom of the cylindrical clamping block 5 through the gap 8 to detach from the first conveyor chain plate 1.

[0067] When the plasterboard 2 enters the second conveyor chain plate 6 from the first conveyor chain plate 1, the film wrapped around the bottom of the cylindrical clamping block 5 is pulled by the plasterboard 2 and naturally lifted out of the gap 8, thus smoothly separating from the first conveyor chain plate 1 and the cylindrical clamping block 5.

[0068] like Figure 2 As shown, in order to install the parallel cylindrical clamping blocks 5 on the bottom of the first conveyor chain plate 1, multiple mounting rods 9 are arranged in a rectangular row on the bottom of the first conveyor chain plate 1, and each mounting rod 9 is set along the transport direction of the gypsum board 2.

[0069] Multiple mounting holes are provided through each cylindrical clamping block 5, and the mounting holes are provided one-to-one with the mounting rod 9. The cylindrical clamping blocks 5 are mounted side by side on the mounting rod 9 through the mounting holes.

[0070] A limiting plate 10 is fixedly installed at one end of the mounting rod 9. The limiting plate 10 is used to prevent the cylindrical clamping block 5 from falling off the mounting rod 9 when the film clamping drive assembly 7 applies force to the cylindrical clamping block 5.

[0071] The way the mounting rod 9 engages with the mounting hole allows the cylindrical clamping block 5 to slide smoothly along the mounting rod 9 when subjected to the force of the clamping drive assembly 7, thus enabling them to move closer together or separate.

[0072] A limiting plate 10 is provided at one end of the mounting rod 9. On the one hand, it can provide reliable axial limiting when the film clamping drive assembly 7 applies force to the cylindrical clamping block 5, effectively preventing the cylindrical clamping block 5 from falling off the mounting rod 9. On the other hand, when the film clamping drive assembly 7 applies force to the cylindrical clamping block 5, it can apply reverse force from the cylindrical clamping block 5 on the other side, squeezing each cylindrical clamping block 5 tightly.

[0073] The film clamping drive assembly 7 is used to apply force to the parallel cylindrical clamping blocks 5 and is located on the side of the mounting rod 9 away from the limiting plate 10.

[0074] The membrane clamping drive assembly 7 includes a drive plate 701, a drive rod 702, and a first drive cylinder 703;

[0075] The drive plate 701 is located on the outer side of the cylindrical clamping block 5, which is away from the limiting plate 10;

[0076] One end of the drive rod 702 is connected to the side of the drive plate 701 away from the cylindrical clamping block 5, and the other end is connected to the drive end of the first drive cylinder 703.

[0077] The first drive cylinder 703 drives the drive rod 702 to move closer to the cylindrical clamping block 5. The drive rod 702 drives the drive plate 701 to move, so as to squeeze the cylindrical clamping blocks 5 closer to each other and make them stick together.

[0078] The reset assembly is used to reset the cylindrical clamping block 5 when the force applied by the first drive cylinder 703 to the cylindrical clamping block 5 is released, so as to prepare for the next clamping action. The reset assembly includes a reset spring 11.

[0079] One end of the return spring 11 is connected to the side wall of one of the cylindrical clamping blocks 5, and the other end is connected to the side wall of the other cylindrical clamping block 5.

[0080] When the cylindrical clamping blocks 5 approach each other, the return spring 11 is compressed and stores elastic potential energy. When the external force on the cylindrical clamping blocks 5 is released, the return spring 11 releases the elastic potential energy and pushes the cylindrical clamping blocks 5 away from each other.

[0081] like Figure 1 , Figure 3As shown, in order to further strengthen the connection strength between the film layers and improve the tightness of the winding after the gypsum board 2 is wrapped, the present invention also provides a welding assembly, specifically including a hot melt welding head 12.

[0082] The hot melt welding head 12 is located below the first conveyor chain plate 1 and on one side of the parallel cylindrical clamping blocks 5. The hot melt welding head 12 is used to heat and weld the film layer wrapped around the bottom of the cylindrical clamping block 5 when the gypsum board 2 is finished.

[0083] The hot melt welding head 12 is arranged along the transport direction of the gypsum board 2, and the length of the hot melt welding head 12 is greater than or equal to the width of the film. The hot melt welding head 12 can generate heat when energized to weld the film layer.

[0084] In the initial state, the hot melt welding head 12 is located upstream of the parallel cylindrical clamping blocks 5 along the transport direction of the gypsum board 2, and is located below the cylindrical clamping blocks 5. During the welding operation, the hot melt welding head 12 moves towards the cylindrical clamping blocks 5 and moves upward to abut against the thin film layer at the bottom of the cylindrical clamping blocks 5.

[0085] After the gypsum board 2 is wrapped, the hot melt welding head 12 heats and welds the film layer located at the bottom of the cylindrical clamping block 5, so that the multiple films are fused into one, which significantly enhances the connection strength between the film layers and avoids the film from loosening, slipping or spreading during transportation as much as possible.

[0086] The hot melt welding head 12 extends along the transport direction of the gypsum board 2, and its length is greater than or equal to the width of the film, which can uniformly heat and weld the film throughout its width, ensuring complete coverage of the welding area.

[0087] The hot melt welding head 12 is initially positioned upstream and below the cylindrical clamping block 5, which prevents it from being wrapped along with the film during the wrapping process.

[0088] When the winding operation of the entire plasterboard 2 is completed to about 90%, the first conveyor chain plate 1 will stop conveying the plasterboard 2. The plasterboard 2 is not completely separated from the area of ​​the cylindrical clamping block 5 and waits on the first conveyor chain plate 1 for the last few turns of film winding. After the winding is completed, the hot melt welding head 12 will perform film welding. After the welding operation is completed, the first conveyor chain plate 1 will resume operation and drive the plasterboard 2 to continue to be conveyed forward.

[0089] After the welding is completed, the film wrapped on the gypsum board 2 and the rolled film 4 need to be cut, which corresponds to the last layer of film wrapped on the gypsum board 2. In order to cut the film, the heating wire 13 is used.

[0090] The heating wire 13 is located below the first conveyor chain plate 1 and on the same side as the hot melt welding head 12. The film cutting assembly is used to cut the outer film after the film layer welding is completed, so as to separate the film wrapped on the gypsum board 2 from the rolled film 4.

[0091] The heating wire 13 is arranged along the transport direction of the gypsum board 2, and the length of the heating wire 13 is greater than or equal to the width of the film. The heating wire 13 can generate heat when energized to cut the outer film.

[0092] In the initial state, the heating wire 13 is located upstream of the parallel cylindrical clamping blocks 5 along the transport direction of the gypsum board 2, and below the cylindrical clamping blocks 5. During the cutting operation, the heating wire 13 moves towards the cylindrical clamping blocks 5 and moves upward to cut the outer film at the bottom of the cylindrical clamping blocks 5.

[0093] The heating wire 13 extends along the transport direction of the gypsum board 2, and its length is greater than or equal to the width of the film, enabling it to heat and cut the film across its entire width in a single operation.

[0094] The heating wire 13 is initially positioned upstream and below the cylindrical clamping block 5, which also prevents it from being wrapped along with the film during the winding process.

[0095] To prevent the heating wire 13 from conducting current to external devices (such as the second drive cylinder 14, the third drive cylinder 15, etc.) when it is energized, an insulating base 16 is provided at each end of the heating wire 13. The two ends of the heating wire 13 are fixedly connected to the insulating base 16 to achieve electrical isolation between the heating wire 13 and the external devices.

[0096] When the rotating bracket 302 is about to complete the last turn of winding the plasterboard 2, the first drive cylinder 703 releases the pressure on the cylindrical clamping block 5, causing the cylindrical clamping block 5 to open under the elastic force of the return spring 11. Then, after the rotating bracket 302 drives the film to pass around the bottom of the cylindrical clamping block 5, the first drive cylinder 703 acts again and drives the cylindrical clamping block 5 to close, thereby clamping the last turn of film on the surface of the plasterboard 2. When the heating wire 13 cuts the last turn of film, the cylindrical clamping block 5 has clamped the free end of the rolled film 4 (no need to stop the machine and manually pull the free end), thus quickly proceeding to the next winding of the plasterboard 2.

[0097] Multiple cylindrical clamping blocks 5 arranged in parallel clamp the film along the width direction, causing the film to be unfolded in the width direction to facilitate subsequent welding and cutting.

[0098] Since the hot melt welding head 12 and the heating wire 13 have the same movement trajectory, the present invention uses the same device to drive the hot melt welding head 12 and the heating wire 13 to move. Specifically, it also includes a displacement driving component.

[0099] The displacement drive assembly is located below the first conveyor chain plate 1 and connects the hot melt welding head 12 and the heating wire 13. The displacement drive assembly is used to drive the hot melt welding head 12 and the heating wire 13 to move forward and then upward toward the cylindrical clamping block 5.

[0100] The heating action of the hot melt welding head 12 and the heating wire 13 can be controlled independently.

[0101] Although driven by the same displacement drive component, the heating actions of the hot melt welding head 12 and the heating wire 13 are controlled independently, allowing the equipment to flexibly start the hot melt welding head 12 or the heating wire 13 according to actual process requirements. That is, during the welding process, only the hot melt welding head 12 is energized, while the heating wire 13 is not energized; during the cutting process, only the heating wire 13 is energized, while the hot melt welding head 12 is not energized.

[0102] In order to drive the hot melt welding head 12 and the heating wire 13 to move forward and then upward, the displacement drive assembly includes a second drive cylinder 14 and a third drive cylinder 15. The second drive cylinder 14 first drives the hot melt welding head 12, the heating wire 13 and the third drive cylinder 15 forward to the bottom of the cylindrical clamping block 5. Then the third drive cylinder 15 drives the hot melt welding head 12 and the heating wire 13 upward to the film close to the bottom of the cylindrical clamping block 5. Then the hot melt welding head 12 and the heating wire 13 are energized in sequence according to the processing steps.

[0103] By adjusting parameters such as the power and welding time of the hot melt welding head 12 and the heating wire 13, appropriate welding energy and welding time can be matched according to the thickness and material characteristics of the wrapping film, so as to avoid problems such as weak welding, over-welding, inability to cut, and excessive cutting, thereby improving the stability and reliability of welding and cutting.

[0104] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A series-type film clamping device for a gypsum board stretch film packaging machine, characterized in that, have: The first conveyor chain plate (1) is used to transport gypsum boards (2) stacked together. The film feeding assembly (3) includes an annular mounting frame (301) and a rotating bracket (302) disposed on one side of the annular mounting frame (301). The first conveyor chain plate (1) drives the gypsum board (2) to pass through the inside of the annular mounting frame (301). The rotating bracket (302) can drive the rolled film (4) to rotate around the annular mounting frame (301) to circumferentially wind the passing gypsum board (2). The film clamping assembly is located below the first conveyor chain plate (1) and above the bottom inner side of the annular mounting frame (301). The film clamping assembly is used to clamp the free end of the rolled film (4) so ​​that the rotating bracket (302) drives the rolled film (4) to rotate and wind. The membrane assembly has multiple cylindrical clamping blocks (5) arranged in parallel along the transport direction of the gypsum board (2), with a gap between adjacent cylindrical clamping blocks (5), and the cylindrical clamping blocks (5) can move towards each other in the horizontal direction when subjected to force. In the initial state, the free end of the rolled film (4) is pulled by external force, and the rotating bracket (302) drives the rolled film (4) to pass around the bottom of the annular mounting frame (301). The unfolded film is tightly attached to the bottom of each cylindrical clamping block (5). Each cylindrical clamping block (5) is brought closer together by external force and clamps the film along the width direction of the film. The rotating bracket (302) continues to drive the rolled film (4) to wrap around the gypsum board (2). A membrane clamping drive assembly (7) is disposed on one side of the membrane clamping assembly for driving each of the cylindrical clamping blocks (5) to move closer to each other; The reset assembly is provided between each adjacent cylindrical clamping block (5). After the gypsum board (2) is wound, the clamping drive assembly (7) releases the force, and the reset assembly drives each cylindrical clamping block (5) to reset and restore the spacing, so as to release the free end of the film.

2. The series clamping device of the gypsum board stretch film packaging machine according to claim 1, characterized in that, A second conveyor chain plate (6) is provided downstream of the first conveyor chain plate (1) along the transport direction of the gypsum board (2). The second conveyor chain plate (6) is used to receive the gypsum board (2) conveyed by the first conveyor chain plate (1). A gap (8) is provided between the first conveyor chain plate (1) and the second conveyor chain plate (6); As the gypsum board (2) is conveyed to the second conveyor chain plate (6), the gypsum board (2) pulls each layer of film wrapped around the bottom of the cylindrical clamping block (5) through the gap (8) and detaches it from the first conveyor chain plate (1).

3. The series clamping device of the gypsum board stretch film packaging machine according to claim 1, characterized in that, It also includes multiple mounting rods (9) arranged in a rectangular row at the bottom of the first conveyor chain plate (1), each of the mounting rods (9) being arranged along the transport direction of the gypsum board (2); Multiple mounting holes are provided through each of the cylindrical clamping blocks (5), and the mounting holes are provided one-to-one with the mounting rods (9). The cylindrical clamping blocks (5) are mounted side by side on the mounting rods (9) through the mounting holes. A limiting plate (10) is fixedly installed at one end of the mounting rod (9). The limiting plate (10) is used to prevent the cylindrical clamping block (5) from falling off the mounting rod (9) when the clamping drive assembly (7) applies force to the cylindrical clamping block (5).

4. The series clamping device for a gypsum board stretch film packaging machine according to claim 3, characterized in that, The membrane clamping drive assembly (7) is disposed on the side of the mounting rod (9) away from the limiting plate (10); The membrane clamping drive assembly (7) includes a drive plate (701), a drive rod (702), and a first drive cylinder (703); The drive plate (701) is located on the outside of the cylindrical clamping block (5) away from the limiting plate (10); One end of the drive rod (702) is connected to the side of the drive plate (701) away from the cylindrical clamping block (5), and the other end is connected to the drive end of the first drive cylinder (703). The first driving cylinder (703) drives the driving rod (702) to move closer to the cylindrical clamping block (5), and the driving rod (702) drives the driving plate (701) to move, so as to squeeze the cylindrical clamping blocks (5) closer to each other and stick together.

5. The series clamping device for a gypsum board stretch film packaging machine according to claim 1, characterized in that, The reset assembly includes a reset spring (11). One end of the return spring (11) is connected to the side wall of one of the cylindrical clamping blocks (5), and the other end is connected to the side wall of the other cylindrical clamping block (5). When the cylindrical clamping blocks (5) approach each other, the return spring (11) compresses and stores elastic potential energy. When the external force on the cylindrical clamping blocks (5) is released, the return spring (11) releases the elastic potential energy and pushes the cylindrical clamping blocks (5) away from each other.

6. The series clamping device of the gypsum board stretch film packaging machine according to claim 1, characterized in that, It also includes a thermomelted welded joint (12); The hot melt welding head (12) is located below the first conveyor chain plate (1) and on one side of the cylindrical clamping blocks (5) arranged in parallel. The hot melt welding head (12) is used to heat and weld the thin film layer wrapped around the bottom of the cylindrical clamping block (5) when the gypsum board (2) is finished winding.

7. The series clamping device for a gypsum board stretch film packaging machine according to claim 6, characterized in that, The hot melt welding head (12) is arranged along the transport direction of the gypsum board (2), and the length of the hot melt welding head (12) is greater than or equal to the width of the film. The hot melt welding head (12) can generate heat when energized to weld the film layer. In the initial state, the hot melt welding head (12) is located upstream of the parallel cylindrical clamping blocks (5) along the transport direction of the gypsum board (2) and below the cylindrical clamping blocks (5). During the welding operation, the hot melt welding head (12) moves towards the cylindrical clamping blocks (5) and moves upward to abut against the thin film layer at the bottom of the cylindrical clamping blocks (5).

8. The series clamping device for a gypsum board stretch film packaging machine according to claim 7, characterized in that, It also includes heating wire (13); The heating wire (13) is located below the first conveyor chain plate (1) and on the same side as the hot melt welding head (12). The film cutting assembly is used to cut the outer film after the film layer welding is completed, so that the film wrapped on the gypsum board (2) is separated from the rolled film (4).

9. The series clamping device of a gypsum board stretch film packaging machine according to claim 8, characterized in that, The heating wire (13) is arranged along the transport direction of the gypsum board (2), and the length of the heating wire (13) is greater than or equal to the width of the film. The heating wire (13) can generate heat when energized to cut the outer film. In the initial state, the heating wire (13) is located upstream of the cylindrical clamping blocks (5) arranged in parallel along the transport direction of the gypsum board (2) and is located below the cylindrical clamping blocks (5). During the cutting operation, the heating wire (13) moves towards the cylindrical clamping blocks (5) and moves upward to cut the outer film of the bottom of the cylindrical clamping blocks (5).

10. The series clamping device of a gypsum board stretch film packaging machine according to claim 9, characterized in that, It also includes displacement drive components; The displacement driving component is located below the first conveyor chain plate (1) and connects the hot melt welding head (12) and the heating wire (13). The displacement driving component is used to drive the hot melt welding head (12) and the heating wire (13) to move forward and then upward towards the cylindrical clamping block (5). The heating action of the hot melt welding head (12) and the heating wire (13) can be controlled independently.

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