A film blowing machine slitting device

Abstract

The utility model relates to a film blowing machine striping device technical field provides a film blowing machine striping device, including frame, the frame is equipped with the crosspiece, at least one cutting mechanism is installed to the crosspiece, the cutting mechanism includes the lantern ring of slidingly sleeving in the crosspiece outside, the lateral wall of lantern ring is equipped with the first threaded hole of through, the second positioning pin is threadedly connected in the first threaded hole, one side of lantern ring is equipped with the connecting block, the recess is equipped with in the connecting block, the cutting knife mechanism is slidably arranged in the recess, one side of connecting block is equipped with with the second threaded hole of recess intercommunication, the first positioning pin is threadedly connected in the second threaded hole. In the utility model, through the sliding cooperation of lantern ring and crosspiece and the locking of second positioning pin, make the position adjustment of cutting mechanism on the crosspiece flexible and the positioning stable, avoid the deviation in operation, simultaneously, the cutting knife mechanism can slide in the recess and lock through the first positioning pin.

Description

Technical Field

[0001] This utility model relates to the technical field of slitting devices for blown film machines, and in particular to a slitting device for blown film machines. Background Technology

[0002] In the plastic film production process, the tubular film extruded by the blown film machine, after cooling, traction, and flattening, usually needs to be cut into multiple single films of predetermined widths by a slitting device to meet the diverse needs of downstream industries. Existing slitting devices generally include a frame, transversely arranged crossbars, and several cutting blade assemblies mounted on the crossbars. By arranging multiple cutters in parallel, synchronous slitting is achieved, thereby improving production efficiency.

[0003] However, the cutting blade assembly in traditional slitting machines often uses a fixed or roughly sliding mounting structure. This not only makes position adjustment on the crossbar difficult and results in poor positioning reliability, but also means that the cutter is usually rigidly mounted at a fixed angle, resulting in only a localized cutting edge being in long-term contact with the high-speed moving film. As usage time increases, the cutting edge in this contact area is prone to wear and dulling, while the remaining cutting edge portion that does not participate in cutting cannot be effectively utilized, leading to wasted blade life. Frequent replacements also affect production continuity and cost control.

[0004] Therefore, there is an urgent need for a blown film machine slitting device with a reasonable structure, flexible adjustment, and full utilization of the blade edge. This device should be able to achieve convenient positioning and stable locking of the slitting mechanism on the crossbar, and support the cutting position, thereby extending the service life of the blade. Utility Model Content

[0005] The purpose of this invention is to solve the problems of inconvenient cutter position adjustment and low blade edge utilization leading to frequent replacements in the slitting device of traditional blown film machines. This invention adopts the following technical solution: A blown film slitting device includes a frame with a crossbar mounted on it. At least one slitting mechanism is mounted on the crossbar. The slitting mechanism includes a collar slidably sleeved outside the crossbar. A first threaded hole is formed in the side wall of the collar, and a second positioning pin is threaded into the first threaded hole. A connecting block is provided on one side of the collar, and a groove is formed in the connecting block. A cutting mechanism is slidably disposed in the groove. A second threaded hole is formed on one side of the connecting block and communicates with the groove. The first positioning pin is threaded into the second threaded hole.

[0006] As described above, in a blown film slitting device, the outer periphery of the crossbar is provided with a snap-fit ​​part, and the inner wall of the collar is provided with a mating part, wherein the snap-fit ​​part and the mating part are interlocked.

[0007] As described above, in a blown film slitting device, the locking part is a limiting block extending along the axial direction of the crossbar, and the mating part is a limiting groove, the cross-sectional shape of the limiting groove matching the cross-sectional shape of the limiting block.

[0008] As described above, in a blown film slitting device, the groove is obliquely formed on one side of the connecting block, and the groove extends from one end near the crossbar downwards away from the crossbar.

[0009] As described above, in a blown film machine slitting device, protrusions are provided on the inner walls of both sides of the groove, and the protrusions are used to limit the cutting mechanism in the lateral direction.

[0010] As described above, in a blown film slitting device, the cutting mechanism includes a blade with the cutting edge of the blade facing downwards.

[0011] As described above, in a blown film slitting device, the cutting mechanism further includes a blade handle. A blade groove is provided on one side of the blade handle, and the blade is slidably disposed in the blade groove. Multiple slots are provided on the two side walls of the blade groove, spaced apart along the length direction. A pusher block is provided at one end of the blade, and a slider is provided on the pusher block. A locking block is provided on one side of the slider to engage with the slots, and the thickness of the locking block is thinner than the thickness of the slider.

[0012] In the blown film slitting device described above, the width of the pusher block is less than or equal to the width between the two protrusions.

[0013] Implementing the embodiments of this utility model has the following beneficial effects: In this invention, the sliding engagement between the collar and the crossbar and the locking of the second positioning pin allow for flexible adjustment and stable positioning of the cutting mechanism on the crossbar, preventing deviation during operation. At the same time, the cutting mechanism can slide within the groove and be locked by the first positioning pin, facilitating adjustment of the blade edge position according to wear conditions, effectively improving blade utilization, reducing replacement frequency, thereby enhancing production continuity and reducing maintenance costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of a blown film machine slitting device according to the present invention.

[0016] Figure 2 yes Figure 1 A structural diagram from another angle.

[0017] Figure 3 This is a schematic diagram of the slitting mechanism of a blown film machine slitting device according to this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the cutter of a blown film machine slitting device according to this utility model.

[0019] Figure 5 yes Figure 4 A structural diagram from another angle.

[0020] As shown in the figure: 1. Crossbar; 11. Limiting block; 2. Cutting mechanism; 21. Collar; 22. Connecting block; 221. Groove; 222. Protrusion; 23. Cutting mechanism; 231. Blade handle; 232. Blade groove; 233. Slot; 234. Pusher block; 235. Blade; 236. Slider; 237. Slot; 24. First positioning pin; 25. Second positioning pin; 26. Limiting groove. Detailed Implementation

[0021] 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.

[0022] like Figures 1 to 5As shown, this utility model proposes a slitting device for a blown film machine, including a frame 3. A crossbar 1 is mounted on the frame 3, and at least one slitting mechanism 2 is mounted on the crossbar 1. The slitting mechanism 2 includes a collar 21 slidably sleeved on the crossbar 1. A first threaded hole is formed in the side wall of the collar 21, and a second positioning pin 25 is threaded into the first threaded hole. A connecting block 22 is provided on one side of the collar 21, and a groove 221 is formed in the connecting block 221. A cutting mechanism 23 is slidably disposed in the groove 221. A second threaded hole communicating with the groove 221 is formed on one side of the connecting block 22, and a first positioning pin 24 is threaded into the second threaded hole. The slitting mechanism 2 is slidably sleeved on the crossbar 1 via the collar 21 and can move freely along the axial direction of the crossbar 1 to adjust the slitting position. Once the position is determined, the second positioning pin 25 is tightened to press against the outer wall of the crossbar 1, locking the collar 21 and the entire slitting mechanism 2 at the desired position on the crossbar 1 of the frame 3. The cutting mechanism 23 is slidably disposed within the groove 221 of the connecting block 22. By adjusting its extension within the groove 221, the contact area between the cutting edge and the film can be changed. After adjustment, the first positioning pin 24 is tightened to press the cutting mechanism 23 firmly, thus reliably fixing the cutting mechanism 23 within the groove 221. Because the collar 21 and the crossbar 1 are slidably engaged and locked by the second positioning pin 25, the position of the cutting mechanism 2 on the crossbar 1 is flexibly adjustable and stably positioned, preventing deviation during operation. Simultaneously, the cutting mechanism 23 can slide within the groove 221 and be locked by the first positioning pin 24, facilitating adjustment of the blade's edge position according to wear conditions, effectively improving blade utilization, reducing replacement frequency, thereby enhancing production continuity and reducing maintenance costs.

[0023] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the outer periphery of the crossbar 1 is provided with a snap-fit ​​portion, and the inner wall of the collar 21 is provided with a mating portion, the snap-fit ​​portion and the mating portion fitting together. The snap-fit ​​portion is a limiting block 11 extending axially along the crossbar 1, and the mating portion is a limiting groove 26, the cross-sectional shape of the limiting groove 26 matching the cross-sectional shape of the limiting block 11. When the collar 21 is fitted onto the crossbar 1, the limiting block 11 is embedded in the limiting groove 26, and the two achieve circumferential snap-fit ​​engagement through the matching cross-sectional shape structure, so that the collar 21 cannot rotate around the axis of the crossbar 1 while sliding along the crossbar 1, ensuring that the connecting block 22 and the cutting mechanism 23 always maintain a stable installation posture.

[0024] Optionally, in some embodiments, the snap-fit ​​portion is a limiting groove extending along the axial direction of the crossbar 1, and the mating portion is a limiting block.

[0025] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, the groove 221 is obliquely formed on one side of the connecting block 22, and the groove 221 extends downward away from the crossbar 1 from one end, adapting to the moving direction of the plastic film. The cutting mechanism 23 is slidably installed in the oblique groove 221, so that after installation, the cutting mechanism 23 naturally assumes an attitude in which the upper end is close to the crossbar 1 and the lower end extends outward, with its cutting edge facing the moving film at an oblique angle. The oblique arrangement makes the cutting direction of the cutting mechanism 23 match the running trajectory of the plastic film, effectively reducing cutting resistance and film deviation, and improving the smoothness of slitting.

[0026] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, the cutting mechanism 23 includes a blade 235 with its cutting edge facing downwards. This allows the cutting edge to apply a cutting force to the plastic film from top to bottom as the film passes horizontally through the slitting area, achieving stable slitting.

[0027] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the inner walls on both sides of the groove 221 are respectively provided with protrusions 222, which are used to limit the cutting mechanism 23 in the lateral direction. When the cutting mechanism 23 is slidably installed in the groove 221, its two sides are clamped and limited from the side by the protrusions 222, thereby restricting the lateral movement of the cutting mechanism 23 in the groove 221 and ensuring that it maintains a stable position and posture during the cutting process.

[0028] Optionally, in some embodiments, the cutting mechanism 23 further includes a handle 231, one side of which is provided with a groove 232. The blade 235 is slidably disposed in the groove 232. The two side walls of the groove 232 are respectively provided with a plurality of slots 233 arranged at intervals along the length direction. One end of the blade 235 is provided with a pusher block 234. The pusher block 234 is provided with a slider 236. One side of the slider 236 is provided with a locking block 237 that engages with the slot 233. The thickness of the locking block 237 is thinner than the thickness of the slider 236, so that it can be embedded in any slot 233 to lock the position of the blade 235. When one side of the pusher block 234 is pressed, the slider 236 is displaced by force, causing the locking block 237 to disengage from the current slot 233, thereby allowing the blade 235 to slide and adjust its extension length within the groove 232. Meanwhile, the cutting mechanism 23 is installed entirely within the groove 221, and its two sides are laterally limited by the inner walls of the groove 221 to prevent lateral movement.

[0029] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, the width of the pusher block 234 is less than or equal to the width between the two protrusions 222. This allows the pusher block 234 to move unimpeded through the gap between the two protrusions 222 when it moves within the groove 221 of the connecting block 22; when the position of the blade 235 needs to be adjusted, the operator can directly press or push the pusher block 234 from the outside without interfering with the protrusions 222.

[0030] Example 1: This utility model proposes a slitting device for a blown film machine, including a frame 3. A crossbar 1 is mounted on the frame 3, and at least one slitting mechanism 2 is mounted on the crossbar 1. The slitting mechanism 2 includes a collar 21 slidably sleeved on the crossbar 1. A first threaded hole is formed in the side wall of the collar 21, and a second positioning pin 25 is threaded into the first threaded hole. A connecting block 22 is provided on one side of the collar 21, and a groove 221 is formed in the connecting block 221. A cutting mechanism 23 is slidably disposed within the groove 221. A second threaded hole communicating with the groove 221 is formed on one side of the connecting block 22, and a first positioning pin 24 is threaded into the second threaded hole. The slitting mechanism 2 is slidably sleeved on the crossbar 1 via the collar 21 and can move freely along the axial direction of the crossbar 1 to adjust the slitting position. Once the position is determined, the second positioning pin 25 is tightened to press against the outer wall of the crossbar 1, locking the collar 21 and the entire slitting mechanism 2 at the desired position on the crossbar 1 of the frame 3. The cutting mechanism 23 is slidably disposed within the groove 221 of the connecting block 22. By adjusting its extension within the groove 221, the contact area between the cutting edge and the film can be changed. After adjustment, the first positioning pin 24 is tightened to press the cutting mechanism 23 firmly, thus reliably fixing the cutting mechanism 23 within the groove 221. Because the collar 21 and the crossbar 1 are slidably engaged and locked by the second positioning pin 25, the position of the cutting mechanism 2 on the crossbar 1 is flexibly adjustable and stably positioned, preventing deviation during operation. Simultaneously, the cutting mechanism 23 can slide within the groove 221 and be locked by the first positioning pin 24, facilitating adjustment of the blade's edge position according to wear conditions, effectively improving blade utilization, reducing replacement frequency, thereby enhancing production continuity and reducing maintenance costs.

[0031] The inner walls on both sides of the groove 221 are provided with protrusions 222, which are used to limit the cutting mechanism 23 in the side. When the cutting mechanism 23 is slidably installed in the groove 221, its two sides are clamped and limited from the side by the protrusions 222, thereby restricting the lateral movement of the cutting mechanism 23 in the groove 221 and ensuring that it maintains a stable position and posture during the cutting process.

[0032] The outer periphery of the crossbar 1 is provided with a snap-fit ​​part, and the inner wall of the collar 21 is provided with a mating part. The snap-fit ​​part and the mating part are interlocked. The snap-fit ​​part is a limiting block 11 extending along the axial direction of the crossbar 1, and the mating part is a limiting groove 26. The cross-sectional shape of the limiting groove 26 matches the cross-sectional shape of the limiting block 11. When the collar 21 is fitted onto the crossbar 1, the limiting block 11 is embedded in the limiting groove 26. The two achieve circumferential snap-fit ​​through the structure with matching cross-sectional shapes, so that the collar 21 cannot rotate around the axis of the crossbar 1 while sliding along the crossbar 1, ensuring that the connecting block 22 and the cutting mechanism 23 always maintain a stable installation posture.

[0033] A groove 221 is obliquely formed on one side of the connecting block 22, extending downwards from the end near the crossbar 1 to accommodate the movement direction of the plastic film. A cutting mechanism 23 is slidably mounted within this oblique groove 221, so that after installation, the cutting mechanism 23 naturally assumes an orientation where its upper end is close to the crossbar 1 and its lower end extends outwards, with its cutting edge facing the moving film at an oblique angle. This oblique arrangement matches the cutting direction of the cutting mechanism 23 with the trajectory of the plastic film, effectively reducing cutting resistance and film deviation, and improving slitting stability. The cutting mechanism 23 includes a blade 235 with its cutting edge facing downwards. This allows the cutting edge to apply a cutting force to the plastic film from top to bottom as the film passes horizontally through the slitting area, achieving stable slitting.

[0034] The cutting mechanism 23 also includes a handle 231. A groove 232 is provided on one side of the handle 231, and the blade 235 is slidably disposed in the groove 232. Multiple slots 233 are provided on the two side walls of the groove 232, spaced apart along the length direction. A pusher block 234 is provided at one end of the blade 235. A slider 236 is provided on the pusher block 234. A locking block 237 is provided on one side of the slider 236, which engages with the slot 233. The thickness of the locking block 237 is thinner than that of the slider 236, so that it can be embedded in any slot 233 to lock the position of the blade 235. When one side of the pusher block 234 is pressed, the slider 236 is displaced by the force, causing the locking block 237 to disengage from the current slot 233, thereby allowing the blade 235 to slide and adjust its extension length within the groove 232. At the same time, the cutting mechanism 23 is installed entirely within the groove 221, and its two sides are laterally limited by the inner walls of the groove 221 to prevent lateral movement.

[0035] The width of the pusher block 234 is less than or equal to the width between the two protrusions 222. This allows the pusher block 234 to move freely through the gap between the two protrusions 222 when it moves within the groove 221 of the connecting block 22. When the position of the blade 235 needs to be adjusted, the operator can press or push the pusher block 234 directly from the outside without interfering with the protrusions 222.

[0036] Specifically, the working principle of this invention is as follows: During operation, the cutting mechanism 2 is slidably sleeved on the crossbar 1 on the frame 3 via the collar 21, and can move freely along the axis of the crossbar 1 to adjust the cutting position; the limiting block 11 on the outer periphery of the crossbar 1 and the limiting groove 26 on the inner wall of the collar 21 are engaged with each other to restrict the collar 21 from rotating around the crossbar 1, ensuring the stability of the posture of the connecting block 22 and the cutting mechanism 23; after the position is determined, the second positioning pin 25 is tightened to press against the outer wall of the crossbar 1, and the entire cutting mechanism 2 is firmly locked in the required position.

[0037] The cutting mechanism 23 is slidably installed in the groove 221 of the connecting block 22. The groove 221 is inclined and extends downward from the end near the crossbar 1 away from the crossbar 1, so that the cutting mechanism 23 is in a posture with the upper end close to the crossbar 1 and the lower end extending outward. Its blade 235 faces downward and is inclined to meet the moving film. At the same time, the protrusions 222 on both sides of the inner wall of the groove 221 laterally clamp and limit the cutting mechanism 23 to prevent lateral movement. After the position of the cutting mechanism 23 is adjusted, the first positioning pin 24 in the second threaded hole on the side wall of the connecting block 22 is tightened to press the cutting mechanism 23, thereby reliably fixing it in the groove 221 and preventing loosening during the cutting process.

[0038] Inside the cutting mechanism 23, the blade 235 is slidably disposed in the blade groove 232 of the blade holder 231, and its tail end is connected to the pusher block 234. The slider 236 on the pusher block 234 is provided with a locking block 237. The locking block 237 is embedded in either of the locking slots 233 on both sides of the blade groove 232 to lock the extension length of the blade 235. Since the thickness of the locking block 237 is less than the thickness of the slider 236, pressing one side of the pusher block 234 can disengage the locking block 237 from the locking slot 233, thereby adjusting the blade position. The width of the pusher block 234 is less than or equal to the width between the two protrusions 222, ensuring that it does not interfere with the protrusions 222 during the adjustment process, making it easy for the operator to complete the operation quickly and smoothly.

[0039] In summary, this invention solves the problems of inconvenient cutter position adjustment and low blade edge utilization leading to frequent replacements in the slitting device of traditional blown film machines. It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A film blowing machine slitting device, comprising a frame (3), wherein the frame (3) is equipped with a crossbar (1), characterized in that, At least one slicing mechanism (2) is installed on the crossbar (1). The slicing mechanism (2) includes a collar (21) slidably sleeved outside the crossbar (1). The side wall of the collar (21) is provided with a through first threaded hole. A second positioning pin (25) is threadedly connected in the first threaded hole. A connecting block (22) is provided on one side of the collar (21). The connecting block (22) is provided with a groove (221). A cutting mechanism (23) is slidably arranged in the groove (221). A second threaded hole communicating with the groove (221) is provided on one side of the connecting block (22). A first positioning pin (24) is threadedly connected in the second threaded hole.

2. The film blowing machine slitting device according to claim 1, characterized in that, The outer periphery of the crossbar (1) is provided with a snap-fit ​​part, and the inner wall of the collar (21) is provided with a mating part, and the snap-fit ​​part and the mating part are interlocked.

3. The film blowing machine slitting device according to claim 2, characterized in that, The snap-fit ​​part is a limiting block (11) extending along the axial direction of the crossbar (1), and the mating part is a limiting groove (26). The cross-sectional shape of the limiting groove (26) matches the cross-sectional shape of the limiting block (11).

4. A film blowing machine slitting device according to claim 1, characterized in that, The groove (221) is obliquely opened on one side of the connecting block (22), and the groove (221) extends from one end near the crossbar (1) downward away from the crossbar (1).

5. A film blowing machine slitting device according to claim 1, characterized in that, The inner walls on both sides of the groove (221) are respectively provided with protrusions (222), which are used to limit the cutting mechanism (23) in the side.

6. A film blowing machine slitting device according to claim 5, characterized in that, The cutting mechanism (23) includes a blade (235) with the cutting edge of the blade (235) facing downward.

7. A film blowing machine slitting device according to claim 6, characterized in that, The cutting mechanism (23) also includes a handle (231), a groove (232) is provided on one side of the handle (231), the blade (235) is slidably disposed in the groove (232), a plurality of slots (233) are provided on the two side walls of the groove (232) at intervals along the length direction, a pusher block (234) is provided at one end of the blade (235), a slider (236) is provided on the pusher block (234), a locking block (237) is provided on one side of the slider (236) to engage with the slot (233), and the thickness of the locking block (237) is thinner than the thickness of the slider (236).

8. A film blowing machine slitting device according to claim 7, characterized in that, The width of the pusher block (234) is less than or equal to the width between the two protrusions (222).

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