Plastic film production storage rack

Abstract

The utility model discloses a storage rack for plastic film production, and belongs to the field of film production. The material storage device mainly comprises a material storage frame body, a lifting assembly and a lubricating assembly, the material storage frame body comprises a bottom plate, and a supporting frame is fixedly installed on the bottom plate; the lifting assembly comprises a transverse beam installed on the supporting frame and transversely arranged, a first motor is installed on the transverse beam, and a lead screw is installed at the output end of the first motor. A vertical rod is installed between the cross beam and the bottom plate, the lead screw is in threaded connection with a nut seat, the periphery of the nut seat is fixedly sleeved with a second connecting plate, the vertical rod is movably sleeved with a first connecting plate, and multiple sets of upper storage rollers arranged at equal intervals are connected between the first connecting plate and the second connecting plate; the lubricating assembly is installed on the second connecting plate and suitable for conducting synchronous linear motion along with the nut base so as to lubricate the surface of the lead screw. According to the storage rack for plastic film production, continuous lubrication is ensured through pulse oil supply of an infiltration type oil storage structure and a cam, surface contact lubrication and blockage prevention, and liquid level meter monitoring.

Description

A storage rack for plastic film production Technical Field

[0001] This utility model relates to the field of film production technology, and in particular to a storage rack for plastic film production. Background Technology

[0002] Plastic film is made from polyvinyl chloride, polyethylene, polypropylene, polystyrene, and other resins. It comes in a wide variety of types, including PVA-coated high-barrier film, biaxially oriented polypropylene film, low-density polyethylene film, and polyester film, and is widely used in packaging, agriculture, electronics, and many other fields. In the plastic film production process, storage racks are indispensable equipment to ensure the orderly supply of raw materials and the temporary storage of finished products. Their performance directly affects production efficiency and workshop space management.

[0003] In existing material storage racks, a servo motor drives a screw to rotate, and the threaded transmission causes a movable block to lift and lower the upper material storage roller, adjusting the distance between it and the lower roller to increase the film stroke and extend the pre-storage length. The lubrication structure's lubrication oil storage tank is filled with oil through a filler port. Under gravity, the lubricating oil drips along the lubrication channel through a small-diameter overflow hole onto the screw, preventing the movable block from sliding and ensuring smooth lifting and lowering.

[0004] In the lubrication structure of this storage rack, the oil level in the lubricating oil storage tank is difficult to control. As the equipment operates for extended periods, the lubricating oil is continuously consumed. If operators fail to replenish the oil through the filler port in time, and the oil level in the storage tank falls below the inlet of the lubrication channel, the gravity-driven lubricating oil delivery path is interrupted, and the screw will not receive continuous lubrication. Furthermore, the small-diameter overflow hole design is prone to clogging. The production workshop environment is complex; dust floating in the air and debris generated during plastic film production can enter the lubricating oil storage tank through the filler port. When these impurities flow into the lubrication channel with the lubricating oil, they easily accumulate in the small-diameter overflow hole, hindering the normal dripping of lubricating oil. This can cause the moving block to jam when sliding on the screw, and in severe cases, it can even cause it to seize up, directly affecting the normal operation of the lifting mechanism. Therefore, a storage rack for plastic film production needs to be designed.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0006] This utility model provides a storage rack for plastic film production to solve the problems of difficulty in controlling oil volume and easy clogging of overflow holes in the lubrication structure of the storage rack, which leads to insufficient lubrication of the screw, jamming of the moving block, and affect lifting.

[0007] This utility model embodiment adopts the following technical solution: a storage rack for plastic film production. It includes a storage rack body, a lifting assembly, and a lubrication assembly. The storage rack body includes a base plate, on which a support frame is fixedly mounted. The lifting assembly includes a horizontally arranged beam mounted on the support frame, a first motor mounted on the beam, and a lead screw fixedly mounted at the output end of the first motor. A vertical rod is fixedly mounted between the beam and the base plate. A nut seat is threaded onto the lead screw, and a second connecting plate is fixedly sleeved on the outer periphery of the nut seat. A first connecting plate is movably sleeved on the vertical rod. Multiple sets of equally spaced upper storage rollers are connected between the first and second connecting plates. The lubrication assembly is mounted on the second connecting plate and is adapted to move linearly synchronously with the nut seat to lubricate the surface of the lead screw.

[0008] Furthermore, the lubrication assembly includes a guide box fixedly mounted on the upper surface of the second connecting plate. The guide box is also sleeved on the lead screw. The guide box has an annular guide portion inside. The guide portion is coaxially sleeved on the lead screw, and the inner wall of the guide portion maintains a certain gap with the outer circle of the lead screw thread.

[0009] The upper surface of the guide part is provided with an annular groove, and the bottom of the groove is provided with a sloped groove that is inclined towards the lead screw. Two sets of semi-circular sponge parts are symmetrically installed in the annular groove. The inner arc surface of the sponge part contacts the top of the threaded tooth of the lead screw. Two sets of symmetrically distributed arc-shaped waist grooves are provided on the side of the guide part near the lead screw. The width of the waist groove is smaller than the thickness of the sponge part.

[0010] Furthermore, two sets of oil storage bottles are symmetrically engaged at the top of the guide box. The oil storage bottles are made of transparent plastic, and the bottom of the oil storage bottle is connected to the annular groove of the guide part through an oil outlet pipe. The lubricating oil stored in the oil storage bottle is suitable for entering the opening through the oil outlet pipe and wetting the sponge part. A cylindrical extrusion part is slidably installed inside the oil storage bottle. An extrusion rod is fixedly connected to the center of the top of the extrusion part. The extrusion rod extends out of the top of the oil storage bottle and is provided with a limiting boss. A compression spring is sleeved between the limiting boss and the top surface of the oil storage bottle. The bottom of the oil storage bottle is filled with a sponge block, and the sponge block is kept wetted by capillary action.

[0011] Furthermore, a transparent level gauge is installed on the side of the oil storage bottle.

[0012] Furthermore, a drive box is fixedly installed on the bottom surface of the second connecting plate. The drive box is horizontally supported by a bearing seat for two sets of opposite fixed shafts, wherein the left side is the first fixed shaft and the right side is the second fixed shaft. A third bevel gear is fixedly installed at one end of the first fixed shaft and a second bevel gear is fixedly installed at one end of the second fixed shaft. The third bevel gear and the second bevel gear are horizontally opposite each other.

[0013] The bottom surface of the second connecting plate is equipped with a first bevel gear via a thrust bearing. The inner hole of the first bevel gear is provided with an internal thread that matches the lead screw. It is connected to the lead screw via a threaded pair. The first bevel gear meshes with the second bevel gear and the third bevel gear to form a bevel gear set transmission structure.

[0014] Furthermore, a second pulley is fixedly installed in the middle of both the first fixed shaft and the second fixed shaft. Two sets of support plates are fixedly installed on the second connecting plate. A camshaft is transversely arranged through the support plate. The camshaft is connected to the support plate bearing. An eccentric cam is fixedly installed on the camshaft. At the same time, a contact part is fixedly installed at one end of the extrusion rod. The eccentric cam is always in contact with the contact part.

[0015] A first pulley is also fixedly mounted on the camshaft. The first pulley is connected to the corresponding second pulley via a belt body. The contour curve of the eccentric cam contacts the roller at the end of the extrusion rod.

[0016] Furthermore, an inlet nozzle is connected to the side of the oil storage bottle near the upper end.

[0017] Furthermore, the lifting assembly also includes multiple sets of lower storage rollers fixedly installed on the base plate and arranged at equal intervals. Multiple sets of lower storage rollers are fixedly installed on the upper surface of the base plate corresponding to the positions of the upper storage rollers. The upper and lower storage rollers are staggered and their axes are parallel. The plastic film is suitable for being interlaced and adhered between the multiple sets of lower storage rollers and the upper storage rollers. Both the upper and lower storage rollers are made of rubber-coated roller surfaces, and their axes are parallel and staggered to form an S-shaped channel.

[0018] Furthermore, two sets of symmetrically arranged guide rods parallel to the lead screw are fixedly installed on both sides of the inner wall of the support frame, and the two ends of the second connecting plate are slidably connected to the two sets of guide rods respectively.

[0019] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0020] A storage rack for plastic film production employs an immersion-type oil storage structure using an oil bottle and a sponge block. A cam-driven extrusion rod periodically squeezes the sponge block, delivering lubricating oil in a pulsed manner to the annular groove of the guide box, where it is evenly coated onto the lead screw surface via a sponge semi-ring. This design overcomes the limitations of traditional gravity-driven oil dripping, which relies on liquid level height. Even with low oil levels in the storage bottle, continuous oil supply is achieved through the capillary action of the sponge block, preventing lubrication interruptions due to insufficient oil. Furthermore, unlike traditional small-diameter overflow orifices, the surface contact lubrication method between the sponge semi-ring and the lead screw significantly reduces the risk of impurity blockage. The arc-shaped groove guides the lubricating oil to cover the entire thread surface, and a level gauge on the side of the storage bottle monitors the oil level in real time. Attached Figure Description

[0021] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0022] In the attached diagram:

[0023] Figure 1 is an overall schematic diagram of a plastic film production storage rack according to this application;

[0024] Figure 2 is a schematic diagram of the bottom structure of Figure 1;

[0025] Figure 3 is an exploded view of Figure 2;

[0026] Figure 4 is an enlarged view of point A in Figure 3;

[0027] Figure 5 is a partial sectional view of Figure 3;

[0028] Figure 6 is an enlarged view of section B in Figure 5;

[0029] Figure label:

[0030] 1. Storage rack body; 11. Base plate; 12. Support frame; 2. Lifting assembly; 21. Crossbeam; 22. Lower storage roller; 24. First motor; 25. Lead screw; 26. Support seat; 27. Vertical rod; 28. First connecting plate; 29. ​​Guide rod; 210. Upper storage roller; 211. Second connecting plate; 212. Nut seat; 3. Lubrication assembly; 31. Storage box; 33. Guide box; 34. Oil bottle; 35. Extruder 36. Pressure rod; 37. Oil outlet pipe; 38. Guide part; 39. Sponge half ring; 30. Spring; 310. Extrusion part; 311. Sponge block; 312. Contact part; 313. Support plate; 314. Camshaft; 315. Eccentric cam; 316. First pulley; 317. First bevel gear; 318. Fixed shaft; 319. Second pulley; 320. Belt body; 321. Second bevel gear; 322. Third bevel gear. Detailed Implementation

[0031] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0032] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0033] Referring to Figures 1 to 6, this embodiment of the utility model provides a storage rack for plastic film production, including a storage rack body 1, a lifting component 2, and a lubrication component 3;

[0034] The storage rack 1 includes a base plate 11, on which a support frame 12 is fixedly installed. The lifting assembly 2 includes multiple sets of lower storage rollers 22 that are fixedly installed on the base plate 11 and arranged at equal intervals. A transverse beam 21 is fixedly installed on the support frame 12. A first motor 24 is fixedly installed on the upper surface of the beam 21 near one end. The output end of the first motor 24 passes through the beam 21, and a lead screw 25 is fixedly installed on the output end of the first motor 24. A support seat 26 is fixedly installed on the base plate 11, and one end of the lead screw 25 is connected to the support seat 26 by a bearing.

[0035] A vertical rod 27 is fixedly installed between the crossbeam 21 and the base plate 11. At the same time, two sets of symmetrically arranged guide rods 29 parallel to the lead screw 25 are fixedly installed on both sides of the inner wall of the support frame 12. A nut seat 212 is threadedly connected to the lead screw 25. A second connecting plate 211 is fixedly sleeved on the outer periphery of the nut seat 212. The two ends of the second connecting plate 211 are slidably connected to the two sets of guide rods 29 respectively.

[0036] A first connecting plate 28 is movably sleeved on the vertical rod 27. Multiple sets of upper storage rollers 210 arranged at equal intervals are fixedly connected between the first connecting plate 28 and the second connecting plate 211. Multiple sets of lower storage rollers 22 arranged at equal intervals are fixedly installed on the upper surface of the base plate 11 corresponding to the positions of the upper storage rollers 210. The upper storage rollers 210 and lower storage rollers 22 are staggered and their axes are parallel. The plastic film is suitable for being interlaced and staggered between the multiple sets of lower storage rollers 22 and the upper storage rollers 210. Both the upper and lower storage rollers 22 are made of rubber-coated roller surface, and their axes are parallel and staggered to form an S-shaped channel.

[0037] When the first motor 24 drives the lead screw 25 to rotate, the nut seat 212 is threadedly engaged with the lead screw 25, and the second connecting plate 211 restricts its own rotational freedom through the guide rod 29. The nut seat 212 will move linearly along the axis of the lead screw 25. The second connecting plate 211 drives the first connecting plate 28 to rise and fall synchronously along the vertical rod 27 through a rigid connection, so that the upper storage roller 210 moves closer to or further away from the lower storage roller 22.

[0038] When the production line speed decreases, the motor drives the upper storage roller 210 to rise, increasing the film storage length; when the production line speeds up, the motor drives the upper storage roller 210 to fall, releasing the stored film.

[0039] The lubrication assembly 3 includes a guide box 33 fixedly installed on the upper surface of the second connecting plate 211. The guide box 33 is also sleeved on the lead screw 25. The guide box 33 has an annular guide part 37 inside. The guide part 37 is coaxially sleeved on the lead screw 25. The inner wall of the guide part 37 maintains a certain gap with the outer circle of the thread of the lead screw 25.

[0040] The upper surface of the guide portion 37 is provided with an annular groove, and the bottom of the groove is provided with a sloping groove inclined towards the lead screw 25. Two sets of semi-circular annular sponge portions 38 are symmetrically installed in the annular groove, and the inner arc surface of the sponge portion 38 contacts the thread tip of the lead screw 25. The guide portion 37 is provided with two sets of symmetrically distributed arc-shaped waist grooves (not shown in the figure) on the side near the lead screw 25, and the width of the waist grooves is smaller than the thickness of the sponge portion 38.

[0041] Two sets of oil storage bottles 34 are symmetrically engaged at the top of the guide box 33. The oil storage bottles 34 are made of transparent plastic, with an oil outlet pipe 36 extending into the bottom and communicating with the annular groove of the guide part 37. The lubricating oil stored in the oil storage bottles 34 is suitable for entering the opening through the oil outlet pipe 36 and wetting the sponge part 38. A cylindrical extrusion part 310 is slidably installed inside the oil storage bottle 34. An extrusion rod 35 is fixedly connected to the center of the top of the extrusion part 310. The extrusion rod 35 protrudes from the top of the oil storage bottle 34 and has a limiting boss (not shown in the figure). A compression spring 39 is sleeved between the limiting boss and the top surface of the oil storage bottle 34. The bottom of the oil storage bottle 34 is filled with a sponge block 311, which is kept wetted by capillary action. A transparent liquid level gauge (not shown in the figure) is installed on the side of the oil storage bottle 34, with the lowest scale line of the liquid level gauge corresponding to the alarm liquid level.

[0042] A drive box 31 is fixedly installed on the bottom surface of the second connecting plate 211. The drive box 31 horizontally supports two sets of oppositely arranged fixed shafts 318 through a bearing seat (not shown in the figure). The left side is the first fixed shaft and the right side is the second fixed shaft. A third bevel gear 322 is fixedly installed at one end of the first fixed shaft and a second bevel gear 321 is fixedly installed at one end of the second fixed shaft. The third bevel gear 322 and the second bevel gear 321 are horizontally opposite each other.

[0043] The bottom surface of the second connecting plate 211 is equipped with a first bevel gear 317 via a thrust bearing. The inner hole of the first bevel gear 317 is provided with an internal thread that matches the lead screw 25. It is connected to the lead screw 25 via a threaded pair. The first bevel gear 317 meshes with the second bevel gear 321 and the third bevel gear 322 to form a bevel gear transmission structure.

[0044] A second pulley 319 is fixedly installed in the middle of both the first fixed shaft and the second fixed shaft. Two sets of support plates 313 are fixedly installed on the second connecting plate 211. A camshaft 314 is transversely arranged through the support plate 313. The camshaft 314 is connected to the support plate 313 by a bearing. An eccentric cam 315 is fixedly installed on the camshaft 314. At the same time, a contact part 312 is fixedly installed at one end of the extrusion rod 35. The eccentric cam 315 is always in contact with the contact part 312.

[0045] Meanwhile, a first pulley 316 is fixedly installed on the camshaft 314. The first pulley 316 and the corresponding second pulley 319 are connected by a belt body 320. The contour curve of the eccentric cam 315 contacts the roller at the end of the extrusion rod 35, forming a cam-follower mechanism.

[0046] Specifically, the oil storage bottle 34 has an inlet nozzle (not shown in the figure) connected to its side near the upper end, and the inlet nozzle is adapted to replenish lubricating oil into the oil storage bottle 34;

[0047] The oil reservoir 34 is replenished with lubricating oil through the inlet nozzle. The sponge block 311 inside absorbs the lubricating oil through capillary action, keeping the bottom wet. The lubricating oil flows into the annular groove of the guide box 33 through the oil outlet pipe 36. The sloping groove at the bottom of the groove guides the oil to converge towards the lead screw 25, wetting the symmetrically installed semi-circular annular sponge parts 38. The inner arc surface of the sponge part 38 contacts the thread tip of the lead screw 25. When the lead screw 25 rotates, the lubricating oil is evenly applied to the tooth tip surface through friction. At the same time, the arc-shaped groove allows the oil to flow to the bottom of the thread, achieving full tooth surface pre-lubrication. The gap between the guide part 37 and the lead screw 25 avoids rigid contact while ensuring that the sponge part 38 adheres to the surface of the lead screw 25, forming a dynamic lubricating film.

[0048] When the lead screw 25 rotates, its threaded pair drives the first bevel gear 317 to rotate. This bevel gear simultaneously meshes with the second bevel gear 321 and the third bevel gear 322, driving two sets of fixed shafts to rotate in opposite directions. Through belt drive (second pulley 319 and first pulley 316), the camshaft 314 rotates, causing the eccentric cam 315 to periodically squeeze the contact portion 312 of the extrusion rod 35. The extrusion rod 35 overcomes the resistance of the spring 39 and moves downward, pushing the extrusion portion 310 to squeeze the sponge block 311 at the bottom of the oil reservoir 34, forcing lubricating oil into the annular groove in a pulsed manner through the oil outlet pipe 36, replenishing the oil storage in the sponge portion 38. The restoring action of the spring 39 ensures that the extrusion rod 35 is always in contact with the cam, forming a continuous oil supply cycle of extrusion-restoration.

[0049] The higher the rotational speed of the lead screw 25, the faster the first bevel gear 317 drives the fixed shaft to rotate, and the rotational speed of the camshaft 314 increases synchronously, increasing the extrusion frequency and achieving adaptive lubrication with high-speed, high-volume supply and low-speed, low-volume supply. A transparent level gauge monitors the oil level in the oil reservoir 34 in real time. When the oil level drops to the minimum mark, an alarm is triggered, prompting manual replenishment of lubricating oil through the inlet pipe. The transparent oil reservoir 34, combined with the visual design of the sponge block 311, facilitates observation of oil consumption and prevents wear on the lead screw 25 due to insufficient oil. The entire device achieves automatic lubrication without electrical control through mechanical transmission, featuring a compact structure and convenient maintenance, ensuring the long-term reliability and accuracy of the lead screw 25 transmission.

[0050] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A storage rack for plastic film production, comprising a storage rack body (1), a lifting assembly (2), and a lubrication assembly (3), characterized in that: The storage rack (1) includes a base plate (11), on which a support frame (12) is fixedly installed; the lifting assembly (2) includes a horizontal beam (21) installed on the support frame (12), on which a first motor (24) is installed, and a lead screw (25) is fixedly installed at the output end of the first motor (24); a vertical rod (27) is fixedly installed between the horizontal beam (21) and the base plate (11), and a screw threaded onto the lead screw (25). The female seat (212) has a second connecting plate (211) fixedly sleeved on its outer periphery. The vertical rod (27) has a first connecting plate (28) movably sleeved on it. Multiple sets of upper storage rollers (210) are connected between the first connecting plate (28) and the second connecting plate (211). The lubrication component (3) is installed on the second connecting plate (211) and is adapted to move synchronously with the nut seat (212) to lubricate the surface of the lead screw (25).

2. The storage rack for plastic film production according to claim 1, characterized in that: The lubrication assembly (3) includes a guide box (33) fixedly installed on the upper surface of the second connecting plate (211). The guide box (33) is also sleeved on the lead screw (25). The guide box (33) has an annular guide part (37) inside. The guide part (37) is coaxially sleeved on the lead screw (25). The inner wall of the guide part (37) maintains a certain gap with the outer circle of the thread of the lead screw (25). An annular groove is opened on the upper surface of the guide part (37). The bottom of the groove is provided with a slope groove that is inclined towards the lead screw (25). Two sets of semi-circular annular sponge parts (38) are symmetrically installed in the annular groove. The inner arc surface of the sponge part (38) contacts the top of the thread tooth of the lead screw (25). Two sets of symmetrically distributed arc-shaped waist grooves are opened on the side of the guide part (37) near the lead screw (25). The width of the waist groove is smaller than the thickness of the sponge part (38).

3. A storage rack for plastic film production according to claim 2, characterized in that: Two sets of oil storage bottles (34) are symmetrically fitted and installed on the top of the guide box (33). The oil storage bottles (34) are made of transparent plastic. The bottom of the oil storage bottle (34) is connected to the annular groove of the guide part (37) through the oil outlet pipe (36). The lubricating oil stored in the oil storage bottle (34) is suitable to enter the opening through the oil outlet pipe (36) and wet the sponge part (38). A cylindrical extrusion part (310) is slidably installed in the oil storage bottle (34). The extrusion part (310) is fixedly connected to the center of the top of the extrusion part (310). The extrusion rod (35) extends out of the top of the oil storage bottle (34) and is provided with a limiting boss. A compression spring (39) is sleeved between the limiting boss and the top surface of the oil storage bottle (34). The bottom of the oil storage bottle (34) is filled with a sponge block (311). The sponge block (311) is kept wet by capillary action.

4. A storage rack for plastic film production according to claim 3, characterized in that: A transparent level gauge is installed on the side of the oil storage bottle (34).

5. A storage rack for plastic film production according to claim 4, characterized in that: A drive box (31) is fixedly installed on the bottom surface of the second connecting plate (211). The drive box (31) horizontally supports two sets of opposite fixed shafts (318) through bearing seats. The left side is the first fixed shaft and the right side is the second fixed shaft. A third bevel gear (322) is fixedly installed at one end of the first fixed shaft and a second bevel gear (321) is fixedly installed at one end of the second fixed shaft. The third bevel gear (322) and the second bevel gear (321) are horizontally opposite each other. A first bevel gear (317) is installed on the bottom surface of the second connecting plate (211) through a thrust bearing. The inner hole of the first bevel gear (317) is provided with an internal thread that matches the lead screw (25). It is connected to the lead screw (25) through a thread pair. The first bevel gear (317) meshes with the second bevel gear (321) and the third bevel gear (322) at the same time to form a bevel gear group transmission structure.

6. A storage rack for plastic film production according to claim 5, characterized in that: A second pulley (319) is fixedly installed in the middle of both the first fixed shaft and the second fixed shaft. Two sets of support plates (313) are fixedly installed on the second connecting plate (211). A camshaft (314) is transversely arranged on the support plate (313). The camshaft (314) is connected to the support plate (313) by a bearing. An eccentric cam (315) is fixedly installed on the camshaft (314). At the same time, a contact part (312) is fixedly installed at one end of the extrusion rod (35). The eccentric cam (315) is always in contact with the contact part (312). A first pulley (316) is also fixedly installed on the camshaft (314). The first pulley (316) is connected to the corresponding second pulley (319) through a belt body (320). The contour curve of the eccentric cam (315) is in contact with the roller at the end of the extrusion rod (35).

7. A storage rack for plastic film production according to claim 6, characterized in that: The oil storage bottle (34) has an inlet nozzle connected to its side near the top.

8. A storage rack for plastic film production according to claim 1, characterized in that: The lifting assembly (2) also includes multiple sets of lower storage rollers (22) that are fixedly installed on the base plate (11) and arranged at equal intervals. Multiple sets of lower storage rollers (22) are fixedly installed on the upper surface of the base plate (11) at the position corresponding to the upper storage roller (210). The upper storage roller (210) and the lower storage roller (22) are staggered and parallel in axis. The plastic film is suitable for being interlaced and adhered between the multiple sets of lower storage rollers (22) and the upper storage roller (210). Both the upper and lower storage rollers (22) are made of rubber-coated roller surface, and their axes are parallel and staggered to form an S-shaped channel.

9. A storage rack for plastic film production according to claim 8, characterized in that: Two sets of symmetrically arranged guide rods (29) parallel to the lead screw (25) are fixedly installed on both sides of the inner wall of the support frame (12). The two ends of the second connecting plate (211) are slidably connected to the two sets of guide rods (29).

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