Automatic winding and unwinding device for degradable cling film roll

Abstract

The utility model belongs to degradable preservative film roll material take -up technology field, and disclose degradable preservative film roll material automatic take -up device, including the bottom plate, the bottom plate top from back to front is provided with take -up mechanism, edge tension clamping deviation rectification subassembly, tension buffer subassembly in proper order, edge tension clamping deviation rectification subassembly drives compression wheel group through screw drive symmetrical displacement block, and the elastic clamping and bidirectional pulling of preservative film edge are carried out, can effectively restrain the edge curling of degradable preservative film because of internal stress, make the edge flatness promote, and tension buffer subassembly realizes the dynamic regulation and mutation buffer of preservative film tension, when tension fluctuation appears in the process that the film material is taken -up, the cooperation of the counterweight block can be through with the cooperation of the counterweight block, and the instantaneous impact force is quickly absorbed, through the increase or decrease of counterweight block, the down pressure gravity of floating roller can be adjusted flexibly, and the tension required by degradable preservative film of different thickness, material is accurately matched.

Description

Technical Field

[0001] This utility model belongs to the field of biodegradable food preservation film roll winding and unwinding technology, specifically a biodegradable food preservation film roll automatic winding and unwinding device. Background Technology

[0002] In recent years, with the increasing global emphasis on environmental protection and the implementation of policies such as the "plastic ban", biodegradable food wrap, as an environmentally friendly alternative to traditional plastic food wrap, has become increasingly widely used in food packaging, fresh food delivery, supermarket retail, and other fields because it can degrade into carbon dioxide and water in the natural environment, effectively reducing white pollution. Biodegradable food wrap is usually made of polylactic acid (PLA), starch-based materials, polyhydroxyalkanoates (PHA), etc. Although these materials have good biodegradability, compared with traditional plastics, they have problems such as poor flexibility, low extensibility, and susceptibility to environmental humidity. During the roll-up and unrolling process, edge curling, wrinkling, and breakage are very likely to occur.

[0003] Currently, most existing automatic roll-up and unwinding devices for cling film on the market are designed for traditional plastic cling film. Their structure and function are difficult to meet the special needs of biodegradable cling film. During the unwinding and unwinding process, traditional devices lack effective constraint on the edges of the film material. As a result, the edges of biodegradable cling film are prone to curling and deformation due to internal stress or uneven traction, leading to uneven edges of the rolled film and affecting the use of subsequent packaging equipment. At the same time, the tension control system of traditional devices often uses a fixed tension adjustment method, which cannot dynamically adjust the tension according to the characteristics of biodegradable cling film. When the film thickness is uneven or the unwinding and unwinding speed changes, excessive tension can easily lead to film breakage, or insufficient tension can cause problems such as loosening and wrinkling of the film. In addition, during the start-up, shutdown, or high-speed operation of the equipment, traditional devices lack an effective buffering mechanism. Sudden changes in tension can cause irreversible damage to the biodegradable cling film, seriously affecting product quality and production efficiency.

[0004] Therefore, an automatic decanting and unloading device for biodegradable cling film rolls is proposed to address the above problems. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides an automatic roll-up and unrolling device for biodegradable cling film. It has the advantages of achieving precise edge clamping and traction correction through an edge tension clamping and correction component, and dynamically adjusting tension and absorbing impact force through a tension buffer component, thereby effectively solving problems such as edge curling and uneven tension of biodegradable cling film.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic take-up and take-down device for biodegradable cling film rolls, including a base plate, wherein the top of the base plate is provided with a take-up and take-down mechanism, an edge tension clamping and correction component, and a tension buffer component arranged sequentially from back to front;

[0007] The edge tension clamping and correction assembly includes a lead screw and a positioning slide rod. One end of the lead screw is connected to a drive motor. Two displacement blocks with opposite moving directions are connected between the lead screw and the positioning slide rod. The lead screw is threaded to the displacement blocks. The positioning slide rod passes through the displacement blocks. A pressure wheel set is connected to the top of the displacement blocks.

[0008] The tension buffer assembly includes two guide rollers arranged in a front-to-back configuration, with a floating roller between them. The two ends of the floating roller are connected to a U-shaped frame, and the bottom of the U-shaped frame is connected to two guide rods arranged symmetrically on the left and right. Guide sleeves are fitted on the guide rods, and the guide sleeves are fixedly connected to the base plate via L-shaped connecting rods. A horizontal plate is fixedly connected to the bottom of the guide rods, and a counterweight is provided on the horizontal plate.

[0009] Preferably, a fixing plate is fixedly connected to both ends of the lead screw, and a base plate is fixedly connected to the bottom of the fixing plate. One end of the lead screw is connected to the corresponding fixing plate through a bearing, and the other end passes through the corresponding fixing plate and is connected to the drive motor.

[0010] Preferably, the pressing wheel assembly includes multiple sets of movable wheels and fixed wheels arranged vertically and vertically along the front-back direction. One side of each movable wheel and fixed wheel is connected to a movable rod and a fixed rod respectively via bearings. A displacement block is fixedly connected to the bottom of the fixed rod. A positioning rod passes through the movable rod. A fixed rod is fixedly connected to the bottom end of the positioning rod. A blocking block is threaded to the top end of the positioning rod. A spring is provided between the blocking block and the movable rod, and the spring is sleeved on the positioning rod.

[0011] Preferably, a positioning hole is provided on the movable rod at a position corresponding to the positioning rod, and the positioning rod passes through the positioning hole.

[0012] Preferably, the two ends of the guide roller are connected to vertical plates via bearings, and the bottom of the vertical plates is fixedly connected to a base plate.

[0013] Preferably, the counterweight has two symmetrically arranged through holes, a vertical rod is installed in the through holes, the bottom end of the vertical rod is fixedly connected to a horizontal plate, and a threaded fastening sleeve is installed above the uppermost counterweight, the threaded fastening sleeve being threadedly connected to the vertical rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The edge tension clamping and correction component of this utility model drives the symmetrical displacement block to drive the pressing wheel group through the screw, which elastically clamps and pulls the edge of the plastic wrap in both directions. It can effectively suppress the edge curling of the biodegradable plastic wrap caused by internal stress. The surface contact pressure of multiple sets of upper and lower corresponding wheel groups improves the edge flatness.

[0016] 2. The tension buffer assembly of this utility model utilizes the synergistic effect of the floating roller, U-shaped frame and counterweight to achieve dynamic adjustment and sudden change buffering of the tension of the cling film. When tension fluctuations occur during the film loading and unloading process, the floating roller can quickly absorb the instantaneous impact force through cooperation with the counterweight, reducing the magnitude of the tension change. At the same time, by adding or removing the counterweight, the downward pressure of the floating roller can be flexibly adjusted to accurately match the tension required by biodegradable cling film of different thicknesses and materials, effectively avoiding film breakage or wrinkles caused by uneven tension, and ensuring a stable and efficient loading and unloading process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the edge tension clamping and correction assembly of this utility model;

[0019] Figure 3 This is a schematic diagram of the displacement block of this utility model;

[0020] Figure 4 This is a schematic diagram of the external structure of the tension buffer assembly of this utility model;

[0021] Figure 5 This is an exploded structural diagram of the tension buffer assembly of this utility model.

[0022] In the picture:

[0023] 1. Base plate; 2. Retraction and extension mechanism;

[0024] 3. Edge tension clamping and correction assembly;

[0025] 31. Lead screw; 32. Positioning slide bar; 33. Drive motor; 34. Displacement block;

[0026] 35. Pressing roller assembly; 351. Movable wheel; 352. Fixed wheel; 353. Movable rod; 354. Fixed rod; 355. Positioning rod; 356. Stop block; 357. Spring; 358. Positioning hole;

[0027] 36. Fixing plate;

[0028] 4. Tension buffer assembly; 41. Guide roller; 42. Floating roller; 43. U-shaped frame; 44. Guide rod;

[0029] 45. Guide sleeve; 46. L-shaped connecting rod; 47. Horizontal plate; 48. Counterweight block; 49. Vertical plate; 410. Through hole; 411. Vertical rod; 412. Threaded fastening sleeve. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figures 1 to 5 As shown, this utility model provides an automatic winding and unwinding device for biodegradable cling film rolls, including a base plate 1. The top of the base plate 1 is provided with a winding and unwinding mechanism 2, an edge tension clamping and correction component 3, and a tension buffer component 4 arranged sequentially from back to front. The winding and unwinding mechanism 2 of the automatic winding and unwinding device for biodegradable cling film rolls is existing publicly available technology and will not be described in detail here.

[0032] The edge tension clamping and correction assembly 3 includes a lead screw 31 and a positioning slide rod 32. One end of the lead screw 31 is connected to a drive motor 33. Two displacement blocks 34 with opposite moving directions are connected between the lead screw 31 and the positioning slide rod 32. The lead screw 31 is threaded to the displacement blocks 34. The positioning slide rod 32 passes through the displacement blocks 34. The top of the displacement blocks 34 is connected to a pressure wheel set 35.

[0033] The edge tension clamping and correction component 3 drives the symmetrical displacement block 34 through the lead screw 31 to drive the pressing wheel group 35, which elastically clamps and pulls the edge of the plastic wrap in both directions. This can effectively suppress the edge curling of the biodegradable plastic wrap caused by internal stress. The surface contact pressure of multiple sets of upper and lower corresponding wheel groups improves the edge flatness.

[0034] The tension buffer assembly 4 includes two guide rollers 41 arranged in a front-to-back manner, a floating roller 42 arranged between the guide rollers 41, a U-shaped frame 43 connected to both ends of the floating roller 42, two guide rods 44 arranged symmetrically on the left and right connected to the bottom of the U-shaped frame 43, a guide sleeve 45 sleeved on the guide rod 44, the guide sleeve 45 being fixedly connected to the base plate 1 through an L-shaped connecting rod 46, a horizontal plate 47 being fixedly connected to the bottom of the guide rod 44, and a counterweight block 48 being arranged on the horizontal plate 47.

[0035] The tension buffer assembly 4 utilizes the synergistic effect of the floating roller 42, U-shaped frame 43, and counterweight 48 to achieve dynamic adjustment and sudden change buffering of the tension of the cling film. When tension fluctuations occur during the film loading and unloading process, the floating roller 42 can quickly absorb the instantaneous impact force by cooperating with the counterweight 48, reducing the magnitude of the tension change. At the same time, by adding or removing the counterweight 48, the downward pressure of the floating roller 42 can be flexibly adjusted to accurately match the tension required by biodegradable cling film of different thicknesses and materials, effectively avoiding film breakage or wrinkles caused by uneven tension, and ensuring a stable and efficient loading and unloading process.

[0036] Specifically, the two ends of the lead screw 31 are fixedly connected to the fixing plates 36, and the bottom of the fixing plates 36 is fixedly connected to the base plate 1. One end of the lead screw 31 is connected to the corresponding fixing plate 36 through the bearing, and the other end passes through the corresponding fixing plate 36 to connect to the drive motor 33.

[0037] Furthermore, the pressing wheel assembly 35 includes multiple sets of movable wheels 351 and fixed wheels 352 arranged vertically and vertically along the front-back direction. One side of each movable wheel 351 and fixed wheel 352 is connected to a movable rod 353 and a fixed rod 354 respectively via bearings. The bottom of the fixed rod 354 is fixedly connected to a displacement block 34. A positioning rod 355 passes through the movable rod 353. The bottom end of the positioning rod 355 is fixedly connected to the fixed rod 354. The top end of the positioning rod 355 is threadedly connected to a stop block 356. A spring 357 is provided between the stop block 356 and the movable rod 353. The spring 357 is sleeved on the positioning rod 355.

[0038] Furthermore, a positioning hole 358 is provided on the movable rod 353 at a position corresponding to the positioning rod 355, and the positioning rod 355 passes through the positioning hole 358.

[0039] It is worth noting that the two ends of the guide roller 41 are connected to the vertical plate 49 via bearings, and the bottom of the vertical plate 49 is fixedly connected to the base plate 1.

[0040] It is worth noting that the counterweight 48 has two symmetrically arranged through holes 410, and a vertical rod 411 is installed in the through holes 410. The bottom end of the vertical rod 411 is fixedly connected to the horizontal plate 47. A threaded fastening sleeve 412 is installed above the uppermost counterweight 48, and the threaded fastening sleeve 412 is threadedly connected to the vertical rod 411.

[0041] The drive motor 33 is existing technology and will not be described in detail here. In addition, this utility model also includes a power supply, a controller and a switch, which are not the main technical points of this patent and will not be described in detail here.

[0042] Working principle and process: The take-up and unwinding mechanism 2 starts, driving the movement of the plastic wrap roll. The plastic wrap passes sequentially through the edge tension clamping and correction component 3 and the tension buffer component 4. At the edge tension clamping and correction component 3, the edge of the plastic wrap is located between the movable wheel 351 and the fixed wheel 352, thereby clamping the edge of the plastic wrap and preventing the edge of the plastic wrap from curling. The drive motor 33 drives the lead screw 31 to rotate, causing the displacement block 34 to move in the opposite direction along the lead screw 31 and the positioning slide bar 32, which in turn drives the pressing wheel group 35 to perform bidirectional pulling and correction on the edge of the plastic wrap. When the plastic wrap passes through the tension buffer component 4, the floating roller 42 floats up and down according to the change of plastic wrap tension under the action of the counterweight 48. It absorbs the instantaneous impact force when the tension changes suddenly. By adding or removing the counterweight 48, the downward pressure of the floating roller 42 can also be flexibly adjusted to precisely control the tension of the plastic wrap. Finally, the take-up and unwinding mechanism 2 completes the take-up and unwinding operation of the roll.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Degradable preservative film roll automatic winding and unwinding device, comprising a bottom plate (1), characterized in that: The top of the base plate (1) is provided with a retracting mechanism (2), an edge tension clamping and correction component (3), and a tension buffer component (4) in sequence from back to front. The edge tension clamping and correction assembly (3) includes a lead screw (31) and a positioning slide rod (32) respectively. One end of the lead screw (31) is connected to a drive motor (33). There are two displacement blocks (34) with opposite moving directions arranged symmetrically on the left and right sides between the lead screw (31) and the positioning slide rod (32). The lead screw (31) is threaded to the displacement block (34). The positioning slide rod (32) passes through the displacement block (34). The top of the displacement block (34) is connected to a pressure wheel assembly (35). The tension buffer assembly (4) includes two guide rollers (41) arranged in front and behind, a floating roller (42) is arranged between the guide rollers (41), and a U-shaped frame (43) is connected to both ends of the floating roller (42). Two guide rods (44) are symmetrically arranged on the left and right sides connected to the bottom of the U-shaped frame (43). A guide sleeve (45) is fitted on the guide rod (44). The guide sleeve (45) is fixedly connected to the base plate (1) through an L-shaped connecting rod (46). A horizontal plate (47) is fixedly connected to the bottom of the guide rod (44). A counterweight (48) is arranged on the horizontal plate (47).

2. The automatic take-up and pay-off device for degradable cling film roll stock of claim 1, wherein: The two ends of the lead screw (31) are fixedly connected to the fixing plates (36), and the bottom of the fixing plates (36) is fixedly connected to the bottom plate (1). One end of the lead screw (31) is connected to the corresponding fixing plate (36) through the bearing, and the other end passes through the corresponding fixing plate (36) and is connected to the drive motor (33).

3. The automatic take-up and pay-out device for degradable cling film roll stock of claim 1, wherein: The pressing wheel assembly (35) includes multiple sets of movable wheels (351) and fixed wheels (352) arranged vertically and vertically along the front-back direction. One side of each of the movable wheel (351) and fixed wheel (352) is connected to a movable rod (353) and a fixed rod (354) respectively via bearings. The bottom of the fixed rod (354) is fixedly connected to a displacement block (34). A positioning rod (355) passes through the movable rod (353). The bottom end of the positioning rod (355) is fixedly connected to the fixed rod (354). The top end of the positioning rod (355) is threadedly connected to a stop block (356). A spring (357) is provided between the stop block (356) and the movable rod (353). The spring (357) is sleeved on the positioning rod (355).

4. The automatic take-up and pay-out device for degradable cling film roll stock of claim 3, wherein: A positioning hole (358) is provided on the movable rod (353) at a position corresponding to the positioning rod (355), and the positioning rod (355) passes through the positioning hole (358).

5. The automatic unwinding and rewinding device for biodegradable cling film rolls according to claim 1, characterized in that: The guide roller (41) has vertical plates (49) connected to both ends by bearings, and the bottom of the vertical plate (49) is fixedly connected to the base plate (1).

6. The automatic unwinding and rewinding device for biodegradable cling film rolls according to claim 1, characterized in that: The counterweight (48) has two symmetrically arranged through holes (410), and a vertical rod (411) is provided in the through hole (410). The bottom end of the vertical rod (411) is fixedly connected to a horizontal plate (47). A threaded fastening sleeve (412) is provided above the uppermost counterweight (48), and the threaded fastening sleeve (412) is threadedly connected to the vertical rod (411).

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