A film wrapping device with a compacting and shaping function

Abstract

The present application relates to the technical field of film wrapping, and particularly relates to a film wrapping equipment with compacting and shaping functions. The film wrapping equipment comprises a frame, a supporting plate and a lower pressing plate. The supporting plate and the lower pressing plate are respectively provided with a circumferential shaping mechanism. The circumferential shaping mechanism comprises a mounting plate and a side edge compacting structure arranged around the mounting plate. The side edge compacting structure comprises a shaft connecting plate capable of moving in a vertical direction, and a side edge pressing plate rotationally connected to the shaft connecting plate at one end. The mounting plate is provided with a lifting driver in transmission connection with the shaft connecting plate. The shaft connecting plate is provided with a rotary driver in transmission connection with the side edge pressing plate. The side edge compacting structure arranged on the supporting plate and the lower pressing plate respectively is independently lifted and swung, the film head position is first swung outward and separated on one side, then lifted and avoided, the remaining sides are continuously compacted, the stability of the material is ensured, the wrapping film is not disturbed, and the continuity and reliability of the film wrapping are improved.

Description

Technical Field

[0001] This invention relates to the field of perimeter packaging technology, specifically to perimeter packaging equipment with a compaction and shaping function. Background Technology

[0002] Stretch film packaging is an automated packaging method that involves wrapping stretch film around goods to achieve containerization, stability, dust protection, and moisture protection. It typically includes processes such as conveying, compaction, rotating the film wrapping mechanism, and film cutting. In existing technologies, to improve stacking stability, some equipment adds an integrated perimeter limiting frame between the supporting platform and the upper pressure plate. This frame uses vertical lifting to cover the top and bottom of the material with film and clamps and shapes the sides of the material.

[0003] However, in the existing technology, on the one hand, the direct up-and-down movement of the limiting frame is prone to rigid resistance due to deviations in the width or shape of the material, resulting in pressure damage or inaccurate positioning. On the other hand, during the wrapping process, the limiting frame must be lifted and detached as a whole, causing the material to completely lose lateral support during winding, which easily leads to loosening or tipping. It is particularly unsuitable for soft packaging, bagged packaging, or irregular stacking, and it is difficult to balance the compaction and shaping effect with the smoothness of wrapping.

[0004] Therefore, there is a need for a perimeter packaging equipment with a compaction and shaping function to solve the problem of poor shaping effect of the peripheral limiting structure in existing perimeter packaging equipment. Summary of the Invention

[0005] To address the problems existing in the prior art, a wrapping packaging device with compaction and shaping function is provided. Through the independent lifting and swinging side pressing structure set on the support plate and the lower pressure plate, the wrapping process is realized so that the film head position is first removed from the outside and then lifted to avoid it, while the remaining sides are continuously pressed, ensuring the stability of the material and not interfering with the wrapping film, thereby improving the continuity and reliability of the wrapping film.

[0006] To address the problems of existing technologies, this invention provides a wrapping packaging device with a compaction and shaping function, comprising a frame, a support plate disposed within the frame, and a lower pressure plate located above the support plate. The lower pressure plate can move closer to or further away from the support plate in a vertical direction. Both the support plate and the lower pressure plate are provided with circumferential shaping mechanisms for applying constraint to the sidewalls of the material during compaction. Each circumferential shaping mechanism includes a mounting plate and side clamping structures disposed around the mounting plate. The side clamping structures include shaft-connected plates that are movably disposed in a vertical direction at corresponding mounting plates. On the plate, there is a side pressure plate, one end of which is rotatably connected to the shaft connecting plate, and the other end extends into the material area between the support plate and the lower pressure plate. The support plate and the lower pressure plate have a movable gap for the corresponding side pressure plate extension end to pass through. The size of the movable gap in the horizontal direction is greater than the thickness of the side pressure plate. The mounting plate is provided with a lifting driver that is pulsatorically connected to the shaft connecting plate for driving the shaft connecting plate to move in the vertical direction. The shaft connecting plate is provided with a rotary driver that is pulsatorically connected to the side pressure plate for driving the side pressure plate to swing in the inward and outward directions around the rotation axis.

[0007] Preferably, each of the shaft connecting plates is equipped with an independent lifting driver. The lifting driver includes a lifting cylinder and a vertical slide rail fixedly mounted on the mounting plate. The lower end of the shaft connecting plate is provided with a lifting plate in the horizontal direction. The lifting plate is slidably engaged with the vertical slide rail and fixedly connected to the output end of the lifting cylinder.

[0008] Preferably, the rotary actuator includes an outward-pushing cylinder, which is fixedly mounted on the lifting plate in a horizontal direction. The output end of the outward-pushing cylinder extends toward the inner surface of the side pressure plate and has a pressing head at its output end for pushing the side pressure plate to swing outward around the rotation axis.

[0009] Preferably, the upper end of the shaft plate is provided with a support plate in the horizontal direction, and a limiting plate extending vertically is fixedly provided on the support plate. The extended end of the limiting plate extends toward the corresponding side pressure plate to limit the outward swing angle of the side pressure plate.

[0010] Preferably, the rotary actuator further includes an internal pressure cylinder, which is fixedly mounted on the support plate in a vertical direction. The output end of the internal pressure cylinder extends toward the outer surface of the side pressure plate and has a downward pressure head at its output end for pushing the side pressure plate to swing inward around the rotation axis.

[0011] Preferably, the side of the pressing head facing the side pressure plate has an inclined surface, and the outer surface of the side pressure plate has a wedge block that cooperates with the inclined surface, which is used to decompose the vertical downward pressure of the pressing head into a horizontal component force along the inclined surface.

[0012] Preferably, the support plate and the lower pressure plate are provided with a stop bar at the horizontal edge of the movable gap. The stop bar cooperates with the limiting plate to restrict the range of motion of the end of the side pressure plate from leaving the movable gap during the swinging process.

[0013] Preferably, the side pressure plate is made of rubber material to buffer contact stress and prevent surface damage when pressing materials.

[0014] Preferably, the upper surface of the support plate is provided with a lower flexible layer to buffer the bottom contact stress during material placement and compaction.

[0015] Preferably, the lower surface of the lower pressure plate is provided with an upper flexible layer to buffer the contact stress on the top of the material during the compaction process.

[0016] The advantages of this application compared to the prior art are: 1. This invention achieves efficient coordination between compaction and shaping and membrane avoidance by setting independently lifting and swinging side clamping structures on the support plate and the lower pressure plate. Each side clamping structure is controlled by an independent lifting driver and a rotating driver, which can first detach and then lift and avoid the membrane head position one by one during the membrane wrapping process, while the remaining sides remain clamped. This ensures the stability of the material throughout the process, avoids interference from the wrapped membrane, and improves the continuity of the membrane wrapping.

[0017] 2. This invention achieves controllable outward separation by setting a support plate and a limiting plate on the shaft connection plate, and cooperating with an outward-pushing cylinder mounted on the lifting plate to drive the side pressure plate to swing outward. When the outward-pushing cylinder pushes the pressure head to act on the inner side of the side pressure plate, the side pressure plate rotates outward around the rotation axis, separating from the material surface. When it swings to a preset angle, its side side contacts the extension end of the limiting plate, which rigidly stops it, precisely limiting the maximum outward swing amplitude. This effectively prevents the side pressure plate from hitting the frame or interfering with the rotating winding film due to overtravel, ensuring that the side pressure plate does not collide with the material before entering the material area and does not rub against the material when exiting.

[0018] 3. This invention uses an internal pressure cylinder to drive the lower pressure head vertically downward. Utilizing the cooperation between its inclined surface and the wedge block on the outer surface of the side pressure plate, the vertical force is efficiently decomposed into an inward horizontal thrust, driving the side pressure plate to swing inward around its rotation axis, achieving reliable clamping of the material's sidewall. Simultaneously, during the outward swing, the stop strip at the edge of the movable gap restricts the lateral movement of the side pressure plate end, while the limiting plate on the support plate limits its maximum swing angle from above. These two elements work together to ensure that the side pressure plate always operates stably within the movable gap, effectively preventing the side pressure plate from detaching or jamming, ensuring the accuracy of the clamping action and the safety of the avoidance process, and improving the stability of the equipment under alternating compaction and shaping conditions and membrane sealing. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a wrapping film packaging device with compaction and shaping function according to the present invention.

[0020] Figure 2 This is a plan view of a wrapping film packaging device with compaction and shaping function according to the present invention.

[0021] Figure 3 This is a three-dimensional structural cross-sectional view of a wrapping film packaging device with compaction and shaping function according to the present invention.

[0022] Figure 4 This is an exploded three-dimensional structural diagram of the support plate and material of a wrapping film packaging device with compaction and shaping function according to the present invention.

[0023] Figure 5 This is an exploded three-dimensional structural diagram of the lower pressure plate and the material in a wrapping film packaging device with compaction and shaping function according to the present invention.

[0024] Figure 6 This is a partial three-dimensional structural cross-sectional view of the circumferential shaping mechanism of a wrapping film packaging device with compaction and shaping function according to the present invention.

[0025] Figure 7 This is a partial planar sectional view of the circumferential shaping mechanism of a wrapping film packaging device with compaction and shaping function according to the present invention.

[0026] Figure 8 yes Figure 7 Enlarged diagram of point A.

[0027] Figure 9 This is a three-dimensional structural diagram of the side pressing structure of a wrapping film packaging device with compaction and shaping function according to the present invention, viewed from a first perspective.

[0028] Figure 10 This is a three-dimensional structural diagram of the side pressing structure of a wrapping film packaging device with compaction and shaping function according to the present invention, viewed from a second perspective.

[0029] Figure 11 This is a plan view of the side pressure plate of a wrapping film packaging device with compaction and shaping function of the present invention in an outward swing state.

[0030] Figure 12 This is a plan view of the side pressure plate of a wrapping film packaging device with compaction and shaping function of the present invention in a compressed state.

[0031] The following are the labels in the diagram: 1. Material; 2. Frame; 3. Support plate; 31. Movement gap; 32. Stop bar; 33. Lower flexible layer; 4. Lower pressure plate; 41. Upper flexible layer; 5. Circumferential shaping mechanism; 51. Mounting plate; 511. Support column; 52. Side clamping structure; 53. Lifting cylinder; 531. Vertical slide rail; 54. Outward push cylinder; 541. Pressing head; 55. Inward pressure cylinder; 551. Lower pressing head; 6. Shaft connecting plate; 61. Lifting plate; 62. Support plate; 621. Limiting plate; 7. Side pressure plate; 71. Wedge block. Detailed Implementation

[0032] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0033] See Figures 1 to 8 As shown, a wrapping packaging device with a compaction and shaping function includes a frame 2, a support plate 3 disposed within the frame 2, and a lower pressure plate 4 located above the support plate 3. The lower pressure plate 4 can move vertically towards or away from the support plate 3. The support plate 3 and the lower pressure plate 4 are respectively provided with circumferential shaping mechanisms 5, used to constrain the sidewalls of the material 1 during the compaction process. The circumferential shaping mechanism 5 includes a mounting plate 51 and side clamping structures 52 disposed around the mounting plate 51. The side clamping structures 52 include shaft connecting plates 6, which are movably disposed on the corresponding mounting plates 51 in the vertical direction. A side pressure plate 7 is rotatably connected at one end to the shaft connecting plate 6, and the other end extends into the material 1 area between the support plate 3 and the lower pressure plate 4. The support plate 3 and the lower pressure plate 4 have movable gaps 31 for the corresponding side pressure plate 7 extension ends to pass through. The horizontal dimension of the movable gap 31 is greater than the thickness of the side pressure plate 7. The mounting plate 51 is provided with a lifting driver that is pulsatorically connected to the shaft connecting plate 6, for driving the shaft connecting plate 6 to move in the vertical direction. The shaft connecting plate 6 is provided with a rotary driver that is pulsatorically connected to the side pressure plate 7, for driving the side pressure plate 7 to swing in the inward and outward directions around the rotation axis.

[0034] The support plate 3 and the lower pressure plate 4 are respectively provided with lifting space for the shaft connecting plate 6 to move between the corresponding mounting plate 51, and the support plate 3 and the lower pressure plate 4 are fixedly connected with the corresponding mounting plate 51 by a support column 511.

[0035] The frame 2 is provided with vertical guide rails arranged around the lower pressure plate 4 in a circumferential direction. The lower pressure plate 4 is slidably mounted on the vertical guide rails to guide it to move smoothly in the vertical direction.

[0036] Once the stack of material 1 to be packaged is conveyed onto the support plate 3, the equipment enters the compaction and shaping stage. At this time, the lower pressure plate 4, driven by an external force, descends smoothly along the vertical guide rails arranged circumferentially within the frame 2, approaching the support plate 3 and applying a vertical clamping force to the material 1. Simultaneously, two sets of circumferential shaping mechanisms 5, installed on the support plate 3 and the lower pressure plate 4, are activated synchronously.

[0037] Each circumferential shaping mechanism 5 includes a mounting plate 51 and side clamping structures 52 arranged around it. The shaft plates 6 in the side clamping structures 52 move vertically along the mounting plate 51 under the drive of a lifting drive. The shaft plates 6 on the support plate 3 move upwards, and the shaft plates 6 on the lower pressure plate 4 move downwards, causing the extended ends of the side pressure plates 7 to enter the material 1 area between the support plate 3 and the lower pressure plate 4. This area has been pre-covered with stretch film on both the upper and lower surfaces for subsequent top and bottom sealing.

[0038] Before the side pressure plate 7 enters the material 1 area, it is driven by a rotary driver to swing outward around the horizontal rotation axis until it is outwardly disengaged, avoiding collision with the material 1. After the shaft connecting plate 6 drives the side pressure plate 7 to the predetermined height position, the rotary driver actuates again, driving the side pressure plate 7 to swing inward, finally adhering to the side wall of the material 1 to form an inwardly swinging pressing position. At this time, the upper and lower side pressure plates 7 together apply lateral constraints to the upper and lower middle parts of the material 1, and with the upper and lower clamping, complete the three-dimensional compaction and shaping.

[0039] After compaction, the equipment enters the rotating wrapping stage. The wrapping head begins to rotate around the material 1. To prevent the side pressure plates 7 from obstructing the continuous wrapping of the film, the side clamping structures 52 on each side operate sequentially according to the wrapping path: First, the side pressure plate 7 corresponding to the current position of the film head swings outward and detaches from the surface of the material 1 under the action of the rotary driver. Then, its shaft plate 6 moves vertically under the drive of the lifting driver, so that the entire side pressure plate 7 exits the height range of the material 1, completely avoiding the wrapping path. The remaining side pressure plates 7 that have not been passed by the film head remain in a closed state to maintain the stability of the material 1. As the film head continues to rotate, the side clamping structure 52 on the next side repeats the above actions, realizing dynamic release side by side, and finally completing the wrapping packaging.

[0040] See Figures 6 to 10 As shown, each of the shaft connecting plates 6 is equipped with an independent lifting driver. The lifting driver includes a lifting cylinder 53 and a vertical slide rail 531 fixedly mounted on the mounting plate 51. The lower end of the shaft connecting plate 6 is provided with a lifting plate 61 in the horizontal direction. The lifting plate 61 is slidably engaged with the vertical slide rail 531 and fixedly connected to the output end of the lifting cylinder 53.

[0041] Since each shaft connecting plate 6 is equipped with an independent lifting driver, the vertical movement of the side pressing structures 52 on each side is completely decoupled and does not interfere with each other. During the film wrapping process, the control system can, based on the real-time circumferential position of the film wrapping head, instruct only the shaft connecting plate 6 on the side that the film head is about to pass to move individually. The corresponding lifting cylinder 53 is activated, driving the lifting plate 61 on that side to descend or rise along the vertical slide rail 531, so that the side pressing plate 7 on that side quickly exits the height area of ​​the material 1, achieving local avoidance. The lifting drivers on the other three sides remain stationary, and the side pressing plates 7 continue to maintain the pressing state, ensuring that the overall stability of the material 1 is not affected.

[0042] See Figures 8 to 12 As shown, the rotary actuator includes an outward-pushing cylinder 54, which is fixedly mounted on the lifting plate 61 in a horizontal direction. The output end of the outward-pushing cylinder 54 extends toward the inner surface of the side pressure plate 7, and a pressing head 541 is provided at its output end for pushing the side pressure plate 7 to swing outward around the rotation axis.

[0043] When it is necessary to swing the side pressure plate 7 outward, the outward push cylinder 54 is activated and extends its piston rod, pushing the pressure head 541 to press against the inner side of the side pressure plate 7. Since one end of the side pressure plate 7 is rotatably connected to the shaft connecting plate 6, under the horizontal thrust applied by the pressure head 541, the side pressure plate 7 swings outward around the rotation axis as a whole, detaching from the side wall of the material 1 and entering the outer release and departure position. This action is performed before the membrane is formed or during the avoidance stage, effectively avoiding interference with the material 1.

[0044] See Figures 8 to 12 As shown, the upper end of the shaft plate 6 is provided with a support plate 62 in the horizontal direction. A limiting plate 621 extending vertically is fixed on the support plate 62. The extended end of the limiting plate 621 extends toward the corresponding side pressure plate 7 to limit the outward swing angle of the side pressure plate 7.

[0045] When the rotary actuator drives the side pressure plate 7 to swing outward, the side pressure plate 7 will gradually rotate outward around the rotation axis connected to the shaft plate 6. During this process, the side pressure plate 7 will gradually approach the limiting plate 621. Once the side pressure plate 7 swings to the preset maximum outward swing angle, its side will contact the extension end of the limiting plate 621. The limiting plate 621, with its rigid structure, will prevent the side pressure plate 7 from continuing to move outward, thereby effectively limiting its outward swing amplitude. This limiting mechanism prevents the side pressure plate 7 from swinging excessively and avoids it from hitting the frame 2 and the wrapping film.

[0046] See Figures 8 to 12As shown, the rotary actuator also includes an internal pressure cylinder 55, which is fixedly mounted on the support plate 62 in a vertical direction. The output end of the internal pressure cylinder 55 extends toward the outer surface of the side pressure plate 7, and a downward pressure head 551 is provided at its output end for pushing the side pressure plate 7 to swing inward around the rotation axis.

[0047] When the equipment enters the compaction and shaping stage, the internal pressure cylinder 55 starts and extends its piston rod downward, driving the lower pressure head 551 to press against the outer area of ​​the side pressure plate 7. Since one end of the side pressure plate 7 is rotatably connected to the shaft connecting plate 6, under the vertical downward force applied by the lower pressure head 551, the side pressure plate 7 swings inward around the horizontal rotation axis, gradually conforming to the side wall of the material 1, and finally reaching the inner swing pressing position. This action achieves effective lateral constraint on the material 1, ensuring that the material 1 remains stable and does not loosen during the film-forming process.

[0048] See Figure 8 , Figure 9 , Figure 11 and Figure 12 As shown, the pressing head 551 has an inclined surface on one side facing the side pressure plate 7, and the outer surface of the side pressure plate 7 has a wedge block 71 that cooperates with the inclined surface, which is used to decompose the vertical downward pressure of the pressing head 551 into a horizontal component force along the inclined surface direction.

[0049] When the pressure head 551 moves vertically downward with the internal pressure cylinder 55, its inclined surface facing the side pressure plate 7 first contacts and presses against the wedge 71 fixed on the outer surface of the side pressure plate 7. As the downward pressure continues to be applied, the mating surfaces of the inclined surface and the wedge 71 interact, decomposing the originally purely vertical downward pressure into two components: a normal force perpendicular to the inclined surface and a thrust with a horizontal component along the inclined surface. It is this horizontal component that pushes the wedge 71, together with the side pressure plate 7, to swing inward around its axis of rotation, thereby achieving the clamping of the side wall of the material 1.

[0050] See Figure 6 and Figure 8 As shown, the support plate 3 and the lower pressure plate 4 are provided with a baffle 32 at the edge of the movable gap 31 along the horizontal direction. The baffle 32 cooperates with the limiting plate 621 to restrict the movement range of the end of the side pressure plate 7 from leaving the movable gap 31 during the swinging process.

[0051] When the side pressure plate 7 swings outward under the drive of the outward pushing cylinder 54, its end gradually approaches the outer stop strip 32 as it passes through the movable gap 31. Simultaneously, the limiting plate 621 on the support plate 62 at the upper end of the shaft connecting plate 6 limits the angle of the side pressure plate 7 from above. The stop strip 32 and the limiting plate 621 work together; the stop strip 32 restricts excessive lateral displacement of the side pressure plate 7 in the horizontal plane, preventing its end from sliding out of the edge of the movable gap 31. The limiting plate 621 controls its maximum swing angle. This ensures that the side pressure plate 7 remains stably within the movable gap 31 during repeated inward and outward swings, avoiding structural interference and preventing it from dislodging or jamming, thus guaranteeing the long-term reliability and safety of the side pressure plate 7.

[0052] See Figures 6 to 12 As shown, the side pressure plate 7 is made of rubber material and is used to buffer contact stress and prevent surface damage when pressing the material 1.

[0053] During the compaction and shaping process, when the side pressure plate 7 swings inward and adheres to the side wall of the material 1, its body, made of rubber, first contacts the surface of the material 1. Due to the good elasticity and flexibility of rubber, under the action of the compaction force, the side pressure plate 7 undergoes slight deformation locally, effectively absorbing and dispersing the concentrated stress in the contact area and avoiding rigid impact. This cushioning effect reduces indentations on fragile or surface-sensitive materials 1 such as cartons, woven bags, and foam packaging. It ensures both the compaction and shaping effect and protects the appearance and integrity of the material 1.

[0054] See Figure 4 As shown, the upper surface of the support plate 3 is provided with a lower flexible layer 33, which is used to buffer the bottom contact stress during the placement and compaction of the material 1.

[0055] When the stack of material 1 is conveyed and placed on the support plate 3, its bottom first contacts the lower flexible layer 33 provided on the upper surface of the support plate 3. The lower flexible layer 33 is made of elastic material and undergoes moderate deformation under the pressure of the material 1's own weight and subsequent compaction process, effectively absorbing and dispersing the concentrated load from the bottom of the material 1, and avoiding local stress concentration caused by hard contact.

[0056] When the lower pressure plate 4 applies compaction pressure downwards, the material 1 is subjected to downward force as a whole, and the lower flexible layer 33 is further compressed, which plays a role in buffering and load equalization. This not only protects the bottom surface of the material 1 from pressure damage or deformation, but also improves the fit between the supporting surface and the material 1, thereby enhancing the stability of the material 1.

[0057] See Figure 5 As shown, the lower surface of the lower pressure plate 4 is provided with an upper flexible layer 41, which is used to buffer the contact stress on the top of the material 1 during the compaction process.

[0058] During the compaction and shaping process, when the lower pressure plate 4 descends along the vertical guide rail and contacts the top of the material 1, the upper flexible layer 41 on its lower surface first contacts the upper surface of the material 1. This upper flexible layer 41 is made of elastic material and undergoes controllable compression deformation during the continuous pressure applied by the lower pressure plate 4, effectively absorbing and dispersing the concentrated load acting on the top of the material 1, and avoiding direct impact from the lower pressure plate 4 that could cause the carton to dent, the bagged material 1 to rupture, or the surface of sensitive products to be damaged.

[0059] Meanwhile, the moderate resilience of the upper flexible layer 41 can adapt to minor unevenness on the top of the material 1, improving the uniformity of the contact surface and making the pressure distribution more even. This buffering mechanism not only protects the integrity of the material 1, but also enhances the overall stability when clamped from top to bottom, providing a solid and regular foundation for the subsequent membrane.

[0060] This invention achieves efficient coordination between compaction and shaping and film avoidance by setting side clamping structures 52 on the support plate 3 and the lower pressure plate 4, respectively controlled by independent lifting and rotating drives. Each side pressure plate 7 can perform an outward release and then lifting and avoiding action according to the position of the film winding head, while the other sides remain clamped, ensuring that the material 1 is stable throughout the process and without film interference.

[0061] During the start-up of the rotary actuator, the outward-pushing cylinder 54 pushes the pressure head 541 against the inner side of the side pressure plate 7, causing it to swing outward. The maximum swing angle is rigidly limited by the limiting plate 621 on the support plate 62. The inward-pressing cylinder 55, through the engagement of the inclined surface of the downward-pressing head 551 with the wedge block 71 on the outer surface of the side pressure plate 7, decomposes the vertical force into an inward horizontal thrust, driving the pressure plate to reliably adhere to the side wall of the material 1. The entire operation enhances the compaction and shaping capability of the material 1, ensuring stability during the film-forming process.

[0062] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A wrapping film packaging device with a compaction and shaping function, comprising a frame, a support plate disposed within the frame, and a lower pressure plate located above the support plate, wherein the lower pressure plate is capable of moving closer to or further away from the support plate in a vertical direction; Its features are, The support plate and the lower pressure plate are respectively provided with circumferential shaping mechanisms for applying constraints to the sidewalls of the material during compaction. The circumferential shaping mechanism includes a mounting plate and side clamping structures disposed around the mounting plate. The side clamping structures include: A shaft-connecting plate is mounted on a corresponding mounting plate, which can be moved vertically. The side pressure plate has one end rotatably connected to the shaft connecting plate, and the other end extends into the material area between the support plate and the lower pressure plate; The support plate and the lower pressure plate have an movable gap for the extension end of the corresponding side pressure plate to pass through, and the dimension of the movable gap in the horizontal direction is greater than the thickness of the side pressure plate; The mounting plate is equipped with a lifting driver that is connected to the shaft plate for driving the shaft plate to move in the vertical direction; The shaft plate is provided with a rotary driver that is connected to the side pressure plate for driving the side pressure plate to swing in the inward and outward directions around the rotation axis.

2. The wrapping equipment with compaction and shaping function according to claim 1, characterized in that, Each of the shaft connecting plates is equipped with an independent lifting driver. The lifting driver includes a lifting cylinder and a vertical slide rail fixedly mounted on the mounting plate. The lower end of the shaft connecting plate is provided with a lifting plate in the horizontal direction. The lifting plate is slidably engaged with the vertical slide rail and fixedly connected to the output end of the lifting cylinder.

3. The wrapping film packaging equipment with compaction and shaping function according to claim 2, characterized in that, The rotary actuator includes an outward-pushing cylinder, which is fixedly mounted on the lifting plate in a horizontal direction. The output end of the outward-pushing cylinder extends toward the inner surface of the side pressure plate and has a pressing head at its output end for pushing the side pressure plate to swing outward around the rotation axis.

4. A wrapping film packaging device with compaction and shaping function according to claim 3, characterized in that, The upper end of the shaft plate is provided with a support plate in the horizontal direction. A limiting plate extending vertically is fixed on the support plate. The extended end of the limiting plate extends toward the corresponding side pressure plate to limit the outward swing angle of the side pressure plate.

5. A wrapping film packaging device with compaction and shaping function according to claim 4, characterized in that, The rotary actuator also includes an internal pressure cylinder, which is fixedly mounted on the support plate in a vertical direction. The output end of the internal pressure cylinder extends toward the outer surface of the side pressure plate and has a downward pressure head at its output end, which is used to push the side pressure plate to swing inward around the rotation axis.

6. A wrapping film packaging device with compaction and shaping function according to claim 5, characterized in that, The pressure head has an inclined surface on the side facing the side pressure plate, and the outer surface of the side pressure plate has a wedge block that cooperates with the inclined surface to decompose the vertical downward pressure of the pressure head into a horizontal component force along the inclined surface.

7. A wrapping film packaging device with compaction and shaping function according to claim 4, characterized in that, The support plate and the lower pressure plate are provided with a stop bar at the horizontal edge of the movable gap. The stop bar cooperates with the limiting plate to restrict the range of motion of the end of the side pressure plate from leaving the movable gap during the swinging process.

8. A wrapping film packaging device with compaction and shaping function according to claim 1, characterized in that, The side pressure plates are made of rubber material and are used to buffer contact stress and prevent surface damage when compressing materials.

9. A wrapping film packaging device with compaction and shaping function according to claim 1, characterized in that, The upper surface of the support plate is provided with a lower flexible layer to buffer the bottom contact stress during material placement and compaction.

10. A wrapping film packaging device with compaction and shaping function according to claim 1, characterized in that, The lower surface of the lower pressure plate is provided with an upper flexible layer, which is used to buffer the contact stress on the top of the material during the compaction process.

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