POF heat shrinkable film slitting machine

Abstract

The utility model relates to a cutting technical field and disclose a kind of POF heat shrinkable film cutting machine, including rack, the top of rack is fixedly connected with cutting mechanism, the top of rack is fixedly connected with the flattening mechanism located in the right side of cutting mechanism, the top of rack is fixedly connected with the guide mechanism located in the right side of flattening mechanism, the right end of rack is fixedly connected with the placing mechanism for placing film cylinder, flattening mechanism includes leveling frame, the top of rack is fixedly connected with leveling frame, the inside of leveling frame is rotatably connected with lower shaft, the outside of lower shaft is fixedly connected with lower flattening roller, the inside of leveling frame is equipped with two sliding slots, the inside of two sliding slots is slidably connected with sliding block, the utility model is through setting flattening mechanism, the pretreatment of film by flattening mechanism, the partial slight defect of raw material can be repaired, avoid the defect such as wrinkle into final product, thereby reduce the scrap rate and the proportion of output of high-quality product is improved.

Description

Technical Field

[0001] This utility model relates to the field of slitting technology, specifically a POF heat shrink film slitting machine. Background Technology

[0002] In the production and application of POF (polyolefin) heat shrink film, heat shrink film is widely used in various industries such as food packaging, daily necessities packaging, and electronic product packaging due to its excellent shrinkage, transparency, and flexibility. As market demands for packaging quality and efficiency continue to increase, higher requirements are being placed on the processing technology and equipment performance of POF heat shrink film.

[0003] In the production process of POF heat shrink film, the slitting process is a crucial step, directly affecting the final dimensions and performance of the heat shrink film. However, existing POF heat shrink film slitting equipment has some shortcomings in practical applications. Existing POF heat shrink film slitting equipment cannot effectively level the heat shrink film during the slitting process, resulting in uneven edges and wrinkles after slitting, affecting the product's appearance quality and subsequent packaging use. Therefore, a POF heat shrink film slitting machine is proposed to solve these problems. Utility Model Content

[0004] (a) Technical problems to be solved The purpose of this invention is to solve the problem that existing POF heat shrink film slitting equipment cannot effectively flatten the heat shrink film during the slitting process, resulting in uneven edges and wrinkles on the slitting heat shrink film, which affects the appearance quality of the product and its subsequent packaging use. Therefore, a POF heat shrink film slitting machine is proposed.

[0005] (II) Technical Solution The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A POF heat shrink film slitting machine includes a frame, a slitting mechanism fixedly connected to the top of the frame, a leveling mechanism fixedly connected to the top of the frame to the right of the slitting mechanism, a guide mechanism fixedly connected to the top of the frame to the right of the leveling mechanism, and a placement mechanism for placing film tubes fixedly connected to the right end of the frame.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Preferably, the slitting mechanism includes a slitting frame, a slitting frame is fixedly connected to the top of the frame, a cylinder is fixedly connected to the top of the slitting frame, a cylinder push rod is slidably connected to the inner side of the cylinder, a pressure plate is fixedly connected to the bottom end of the cylinder push rod, two guide rods are fixedly connected to the inner side of the frame, the pressure plate is slidably connected to the outer side of the two guide rods, a cutting seat is fixedly connected to the bottom end of the pressure plate through four connecting rods, a slitting knife is fixedly connected to the bottom end of the cutting seat, and a cutting base is fixedly connected to the top of the frame, with a knife hole opened on the cutting base.

[0008] Preferably, the leveling mechanism includes a leveling frame, with the top of the frame fixedly connected to the leveling frame. A lower rotating shaft is rotatably connected to the inner side of the leveling frame, and a lower leveling roller is fixedly connected to the outer side of the lower rotating shaft. Two sliding grooves are formed on the inner side of the leveling frame, and sliders are slidably connected to the inner sides of the two sliding grooves. An upper rotating shaft is rotatably connected between the two sliders, and an upper leveling roller is fixedly connected to the outer side of the upper rotating shaft. A screw is threadedly connected to the inner side of the leveling frame, and two screws are respectively rotatably limited and connected to the inner sides of the two sliders.

[0009] Preferably, the guiding mechanism includes rotating seats, and four rotating seats are fixedly connected to the top of the frame, with guide rollers rotatably connected between two adjacent rotating seats on the left and right.

[0010] Preferably, the placement mechanism includes a first hinge seat, and two first hinge seats are fixedly connected to the right end of the frame. Both first hinge seats are hinged to the support frame. Two second hinge seats are fixedly connected to the right end of the frame. Both second hinge seats are hinged to an electric telescopic rod. The telescopic ends of the two electric telescopic rods are hinged to the support frame. The support frame is provided with a placement slot.

[0011] (III) Beneficial Effects Compared with the prior art, the technical solution of this application has the following beneficial technical effects: This invention, by setting up a leveling mechanism, can repair some minor defects in the raw materials through the pretreatment of the film, thus avoiding the introduction of defects such as wrinkles into the final product, thereby reducing the scrap rate and defect rate and increasing the output ratio of high-quality products. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the slitting mechanism of this utility model; Figure 3 This is a schematic diagram of the leveling mechanism of this utility model; Figure 4 This is a schematic diagram of the guiding mechanism structure of this utility model; Figure 5 This is a schematic diagram of the placement mechanism of this utility model.

[0013] In the diagram: 1. Frame; 2. Slitting mechanism; 21. Slitting frame; 22. Cylinder; 23. Cylinder push rod; 24. Pressure plate; 25. Guide rod; 26. Connecting rod; 27. Cutting seat; 28. Slitting knife; 29. ​​Cutting base; 210. Knife hole; 3. Leveling mechanism; 31. Leveling frame; 32. Lower rotating shaft; 33. Lower leveling roller; 34. Slide groove; 35. Sliding block; 36. Upper rotating shaft; 37. Upper leveling roller; 38. Screw; 4. Guide mechanism; 41. Rotating seat; 42. Guide roller; 5. Placement mechanism; 51. First hinge seat; 52. Support frame; 53. Second hinge seat; 54. Electric telescopic rod. Detailed Implementation

[0014] 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.

[0015] In the embodiments, by Figure 1-5 A POF heat shrink film slitting machine is provided, comprising a frame 1, a slitting mechanism 2 fixedly connected to the top of the frame 1, a leveling mechanism 3 located to the right of the slitting mechanism 2 fixedly connected to the top of the frame 1, a guide mechanism 4 located to the right of the leveling mechanism 3 fixedly connected to the top of the frame 1, and a placement mechanism 5 for placing film tubes fixedly connected to the right end of the frame 1.

[0016] With the above setup, the rolled POF heat-shrink film is mounted onto the placement mechanism 5. After being drawn out from the placement mechanism 5, the film enters the guiding mechanism 4. The guiding mechanism 4 is responsible for smoothly and accurately guiding the film into the subsequent parts of the machine and for initially correcting any deviations in the film, laying the foundation for subsequent processes. The film then enters the leveling mechanism 3. Since internal stress may occur during the winding and storage of the film roll, causing wrinkles or deformation, the leveling mechanism 3 effectively eliminates wrinkles and restores the film to a flat state by gently heating and pressing the film. This step is crucial for ensuring the quality of the final slit product. The flat film is precisely conveyed to the slitting mechanism 2. The slitting mechanism 2 is the core component, typically equipped with high-speed rotating circular blades (hard blades) or cutting blades (soft blades). According to the preset width specifications, the distance between the blades is adjusted, and the film is instantly and precisely slit into multiple narrow rolls of the required width as it passes through. The slit multiple narrow-width films are independently wound up by a winding device on the other side of the machine (not shown in the figure, located to the left of the slitting mechanism 2), ultimately forming multiple neat and qualified finished film rolls. The leveling mechanism 3 pre-treats the film, which can repair some minor defects in the raw materials and prevent wrinkles and other defects from being introduced into the final product, thereby reducing the scrap rate and defect rate and increasing the output ratio of high-quality products.

[0017] Reference Figure 1-5 The slitting mechanism 2 includes a slitting frame 21. The top of the frame 1 is fixedly connected to the slitting frame 21. The top of the slitting frame 21 is fixedly connected to a cylinder 22. The inner side of the cylinder 22 is slidably connected to a cylinder push rod 23. The bottom end of the cylinder push rod 23 is fixedly connected to a pressure plate 24. The inner side of the frame 1 is fixedly connected to two guide rods 25. The pressure plate 24 is slidably connected to the outer side of the two guide rods 25. The bottom end of the pressure plate 24 is fixedly connected to a cutting seat 27 through four connecting rods 26. The bottom end of the cutting seat 27 is fixedly connected to a slitting knife 28. The top of the frame 1 is fixedly connected to a cutting base 29. The cutting base 29 has a knife hole 210. With the above structural configuration, after the film is processed by the leveling mechanism 3, it is smoothly and continuously conveyed to the upper surface of the cutting base 29 of the slitting mechanism 2. At this time, the cylinder 22 is in the retracted state, and the cylinder push rod 23 drives the pressure plate 24 to the upper position. The pressure plate 24 lifts the cutting seat 27 and the slitting blade 28 through the connecting rod 26, so that the cutting edge of the slitting blade 28 leaves the film surface. The film can pass freely in this state. When the film feed reaches the preset length, the cylinder 22 starts to move. The cylinder push rod 23 extends downward, pushing the pressure plate 24 smoothly and vertically downward along the two fixed guide rods 25. The core function of the guide rods 25 is to ensure that the pressure plate 24 will not tilt or deviate, ensuring the linear accuracy of the downward pressing action. The pressure plate 24 transmits power synchronously to the cutting seat 27 below through the four connecting rods 26, driving the slitting blade 28 to move vertically downward. The slitting blade 28 presses precisely against the film with extremely high perpendicularity, piercing (or cutting through) the film and finally entering the specially opened blade hole 210 on the cutting base 29. This "blade entry hole" design achieves "suspended cutting" similar to scissors, cleanly and neatly cutting the film, avoiding wear on the blade tip, and effectively preventing incomplete cuts or burrs. After the cutting action is completed, the cylinder 22 immediately reverses direction, and the cylinder push rod 23 retracts. The cylinder push rod 23 pulls the pressure plate 24 smoothly upward along the guide rod 25, thereby lifting the cutting base 27 and the slitting blade 28 out of the blade hole 210 through the connecting rod 26, completely detaching them from the film surface. Once the slitting blade 28 returns to a safe height, the winding device restarts, advancing the film forward by a set length. Subsequently, the cylinder 22 actuates again, starting the next slitting cycle.

[0018] Reference Figure 1-5 The leveling mechanism 3 includes a leveling frame 31. The top of the frame 1 is fixedly connected to the leveling frame 31. The inner side of the leveling frame 31 is rotatably connected to the lower rotating shaft 32. The outer side of the lower rotating shaft 32 is fixedly connected to the lower leveling roller 33. The inner side of the leveling frame 31 has two sliding grooves 34. The inner side of each of the two sliding grooves 34 is slidably connected to a slider 35. The two sliders 35 are rotatably connected to an upper rotating shaft 36. The outer side of the upper rotating shaft 36 is fixedly connected to an upper leveling roller 37. The inner side of the leveling frame 31 is threaded with a screw 38. The two screws 38 are respectively rotatably limited and connected to the inner side of the two sliders 35. With the above-described structure, the film, drawn from the placement mechanism 5 and initially guided by the guiding mechanism 4, is manually or automatically guided into the gap between the upper leveling roller 37 and the lower leveling roller 33 of the leveling mechanism 3. The lower leveling roller 33 is fixedly mounted on the leveling frame 31 via the lower rotating shaft 32, and its position is fixed. The position of the upper leveling roller 37 is adjustable. By rotating the two screws 38, the slider 35 can be driven to slide vertically up and down along the slide groove 34. The slider 35 drives the upper rotating shaft 36 and the upper leveling roller 37 to rise and fall together, thereby precisely adjusting the gap (i.e., pressure) between the upper leveling roller 37 and the lower leveling roller 33. Depending on the thickness and wrinkle degree of the POF film, the operator adjusts the gap to be slightly smaller than the film thickness, or to a pressure that produces a noticeable crushing sensation on the film but does not hinder its smooth passage. This adjustable pressure is key to the leveling effect. After the equipment is started, the film passes through the leveling mechanism 3 at a uniform speed under the action of traction force. The film enters the pressing zone between the upper leveling roller 37 and the lower leveling roller 33. Since the gap is preset to apply appropriate pressure to the film, when the wrinkled film passes through: Lateral wrinkles are pulled open by the lateral stretching action of the rollers. Longitudinal wrinkles or curls are flattened by the vertical rolling action of the rollers. Internal stress is released and reorganized under gentle heating (if the rollers are heated) and mechanical rolling, becoming flat and stable. After passing through the pressing zone, the wrinkles of the film are completely eliminated, becoming very flat, and then it is smoothly conveyed to the slitting mechanism 2, ready for high-quality slitting.

[0019] Reference Figure 1-5 The guide mechanism 4 includes a rotating seat 41. Four rotating seats 41 are fixedly connected to the top of the frame 1, and guide rollers 42 are rotatably connected between two adjacent rotating seats 41 on the left and right. With the above structural arrangement, the film drawn from the film tube on the placement mechanism 5 is routed around two (or more) guide rollers 42. The specific routing method is usually an "S"-shaped loop, where the film alternately loops around the upper and lower guide rollers 42 to increase the contact area between the film and the rollers and improve the guiding effect. The guide rollers 42 can rotate freely and flexibly on the rotating seat 41. When the film passes through, the film and the surface of the guide rollers 42 experience rolling friction, with very little friction. The primary function of these guide rollers 42 is to support the film, prevent it from sagging due to its own weight, and maintain a relatively constant tension during the transmission process.

[0020] Reference Figure 1-5 The placement mechanism 5 includes a first hinge seat 51. Two first hinge seats 51 are fixedly connected to the right end of the frame 1. Both first hinge seats 51 are hinged to the support frame 52. Two second hinge seats 53 are fixedly connected to the right end of the frame 1. Both second hinge seats 53 are hinged to electric telescopic rods 54. The telescopic ends of the two electric telescopic rods 54 are hinged to the support frame 52. The support frame 52 is provided with a placement groove 55. With the above structural configuration, by controlling the retraction of the electric telescopic rod 54, the support frame 52 can be driven to rotate downward around its hinge point with the first hinge seat 51, causing the opening of the placement slot 55 to tilt towards the operator, even approaching a horizontal state. This allows the operator to easily roll or place a new film tube into the placement slot 55, almost as if "dropping" it. After loading is complete, the electric telescopic rod 54 extends again, raising the support frame 52 to the working angle. The entire process is labor-saving, quick, and safe. (Achieved by the placement slot 55 and the support frame 52) Adaptable to different specifications of film tubes, with strong versatility: The placement slot 55 is usually designed as an arc-shaped support groove, rather than a closed bearing seat. This open design can accommodate film tubes of different diameters and even different widths, as long as their width is within the span of the support frame 52 and their shaft diameter matches the placement slot 55. This enhances the equipment's adaptability to different production tasks.

[0021] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] 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. A POF heat shrink film slitting machine, characterized in that, The machine includes a frame (1), a cutting mechanism (2) is fixedly connected to the top of the frame (1), a leveling mechanism (3) located to the right of the cutting mechanism (2) is fixedly connected to the top of the frame (1), a guide mechanism (4) located to the right of the leveling mechanism (3) is fixedly connected to the top of the frame (1), and a placement mechanism (5) for placing the film tube is fixedly connected to the right end of the frame (1).

2. The POF heat shrink film slitting machine according to claim 1, characterized in that: The slitting mechanism (2) includes a slitting frame (21). The top of the frame (1) is fixedly connected to the slitting frame (21). The top of the slitting frame (21) is fixedly connected to a cylinder (22). The inner side of the cylinder (22) is slidably connected to a cylinder push rod (23). The bottom end of the cylinder push rod (23) is fixedly connected to a pressure plate (24). The inner side of the frame (1) is fixedly connected to two guide rods (25). The pressure plate (24) is slidably connected to the outer side of the two guide rods (25). The bottom end of the pressure plate (24) is fixedly connected to a cutting seat (27) through four connecting rods (26). The bottom end of the cutting seat (27) is fixedly connected to a slitting knife (28). The top of the frame (1) is fixedly connected to a cutting base (29). The cutting base (29) has a knife hole (210).

3. The POF heat shrink film slitting machine according to claim 1, characterized in that: The leveling mechanism (3) includes a leveling frame (31). The top of the frame (1) is fixedly connected to the leveling frame (31). The inner side of the leveling frame (31) is rotatably connected to a lower rotating shaft (32). The outer side of the lower rotating shaft (32) is fixedly connected to a lower leveling roller (33). The inner side of the leveling frame (31) has two sliding grooves (34). The inner side of each of the two sliding grooves (34) is slidably connected to a slider (35). The two sliders (35) are rotatably connected to an upper rotating shaft (36). The outer side of the upper rotating shaft (36) is fixedly connected to an upper leveling roller (37). The inner side of the leveling frame (31) is threaded with a screw (38). The two screws (38) are respectively rotatably limited and connected to the inner side of the two sliders (35).

4. A POF heat shrink film slitting machine according to claim 1, characterized in that: The guiding mechanism (4) includes a rotating seat (41). Four rotating seats (41) are fixedly connected to the top of the frame (1), and guide rollers (42) are rotatably connected between two adjacent rotating seats (41).

5. A POF heat shrink film slitting machine according to claim 1, characterized in that: The placement mechanism (5) includes a first hinge seat (51). Two first hinge seats (51) are fixedly connected to the right end of the frame (1). Both first hinge seats (51) are hinged to the support frame (52). Two second hinge seats (53) are fixedly connected to the right end of the frame (1). Both second hinge seats (53) are hinged to electric telescopic rods (54). The telescopic ends of the two electric telescopic rods (54) are hinged to the support frame (52). The support frame (52) is provided with a placement slot (55).

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