Plastic film slitting equipment

Abstract

The utility model discloses plastic film slitting equipment, which belongs to the technical field of plastic film slitting and comprises a film slitting assembly. A film coiled material; a wind-up roller; the slitting film unfolding anti-rolling assembly comprises a plurality of U-shaped unfolding passage boxes and two edge unfolding lower pressing wheels, the U-shaped unfolding passage boxes are used for allowing slitting film strips to penetrate through, the two edge unfolding lower pressing wheels are symmetrically and rotationally installed on the lower portions of the inner walls of the two sides of each U-shaped unfolding passage box, and a slitting film passage space is formed between each edge unfolding lower pressing wheel and the inner bottom wall of the corresponding U-shaped unfolding passage box; and the edge side of the slit film strip is output from the slit film passage space to the U-shaped unfolding passage box and is pressed down by the edge unfolding pressing wheel. According to the edge unfolding and pressing wheel, slight pressure is applied to the edge of a slit film strip after slitting, the edge is prevented from being folded or curled, it is guaranteed that the slit film strip is kept flat in the conveying process, and the subsequent machining problem caused by the uneven edge is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of plastic film slitting, especially a plastic film slitting equipment. BACKGROUND

[0002] With the wide application of plastic film in packaging, agriculture, industry and other fields, the demand for film slitting equipment is increasing. Although the existing film slitting equipment can basically meet the requirements of slitting and winding, there are still some problems and deficiencies in actual application, which limit its performance in efficient production and high-quality products.

[0003] Specifically, the existing technology mainly has the following shortcomings, such as: the film strip after slitting is prone to edge curling phenomenon in the conveying process due to uneven tension or stress concentration. This curling not only affects the flatness of the film strip, but also causes problems in subsequent processing, such as irregular winding, packaging difficulty, etc.

[0004] After searching, such as the existing Chinese patent publication number: CN208196926U film slitting machine, including support, the support is equipped with the transmission module for conveying film and the cutting module for cutting film, the transmission module and the cutting module are connected with the controller, the controller is used for controlling the transmission speed of the transmission module and the cutting speed of the cutting module, the transmission module is equipped with the buffer module away from the cutting module side; the buffer module includes fixed guide pin group, moving guide pin group, first sensor and second sensor, the film is around the fixed guide pin group, moving guide pin group and extends to the transmission module, the moving guide pin group is movable up and down relative to the fixed guide pin group, the first sensor and the second sensor are respectively used for sensing both ends of the moving range of the moving guide pin group, the first sensor and the second sensor are connected with the controller.

[0005] The above cited patent literature also has the same problem, the film strip after slitting is prone to edge curling phenomenon in the conveying process due to uneven tension or stress concentration. This curling not only affects the flatness of the film strip, but also causes problems in subsequent processing, such as irregular winding, packaging difficulty, etc. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a plastic film slitting equipment to solve the problems raised in the background art.

[0007] To achieve the above purpose, the utility model provides the following technical scheme: a plastic film slitting equipment, comprising:

[0008] The film slitting assembly comprises a U-shaped support, two slitting rollers installed in the U-shaped support in a radial direction, and a plurality of slitting blades symmetrically arranged on the side of each slitting roller.

[0009] A film roll is arranged to rotate at the back side of the slitting roller and to deliver the film from between the two slitting rollers;

[0010] A winding roller is arranged to rotate at the front side of the slitting roller and symmetrically installed with a plurality of slitting winding drums for receiving the slitting film strips cut by the slitting blades from between the two slitting rollers;

[0011] A slitting film unwinding anti-winding assembly is arranged between the winding roller and the slitting roller, which comprises a plurality of U-shaped unwinding passage boxes for each slitting film strip to pass through, and two edge unwinding down-pressing wheels symmetrically and rotatably arranged at the lower parts of the inner walls of the two sides of the U-shaped unwinding passage boxes, each of the edge unwinding down-pressing wheels has a slitting film passage space between the U-shaped unwinding passage box and the inner bottom wall, and the edge sides of the slitting film strips are output from the U-shaped unwinding passage box and pressed down by the edge unwinding down-pressing wheels from the slitting film passage space.

[0012] Preferably, the top end of each of the U-shaped unwinding passage boxes is provided with a detachable top cover, and the slitting film unwinding anti-winding assembly further comprises a lower wiping cotton block fixed to the inner bottom wall of the U-shaped unwinding passage box away from the edge unwinding down-pressing wheel, and an upper wiping cotton block fixed to the inner wall of the detachable top cover.

[0013] The bottom surface and the top surface of the slitting film strips are wiped and cleaned by the lower wiping cotton block and the upper wiping cotton block, respectively.

[0014] Preferably, the two side outer walls of the lower wiping cotton block are attached to the two inner walls of the U-shaped unwinding passage box, and the upper wiping cotton block is adapted to be connected to the U-shaped unwinding passage box, so that the slitting film strips pass through between the lower wiping cotton block and the upper wiping cotton block by friction.

[0015] The lower wiping cotton block and the upper wiping cotton block centripetally clamp the flat slitting film strips.

[0016] Preferably, the lower wiping cotton block and the upper wiping cotton block are arranged symmetrically in up and down directions.

[0017] Preferably, the lower wiping cotton block is integrally connected with an arc-shaped slope body near one side of the edge unwinding down-pressing wheel, and the upper wiping cotton block has a rounded corner part near one corner of the edge unwinding down-pressing wheel.

[0018] Preferably, each of the U-shaped unwinding passage boxes is fixedly connected with an arc-shaped transition plate on the outer wall of the side away from the lower wiping cotton block.

[0019] Preferably, a plurality of linear guide rail seats are arranged below the U-shaped unwinding passage boxes, and each of the U-shaped unwinding passage boxes is fixed with a sliding block member sliding in the sliding channel in the linear guide rail seat.

[0020] Preferably, the bottom surface of the linear guide rail seat is symmetrically fixed with two L-shaped support columns, and the ends of the two L-shaped support columns away from the linear guide rail seat are fixed on the outer wall of the U-shaped support.

[0021] Preferably, the top surface of each U-shaped unfolding passage box is provided with a fixed clamping groove, and a magnet piece is bonded in each fixed clamping groove.

[0022] Preferably, the back outer wall of the U-shaped support is symmetrically fixed with two first extension seats, and the film roll is rotatably installed between the two first extension seats.

[0023] Compared with the prior art, the technical effects and advantages of the present application are:

[0024] The combination of the cutting roller and the cutting blade can simultaneously cut the film into multiple strips, improving the cutting efficiency. The equidistant and symmetrical installation position of the cutting blade ensures the precision and consistency of the cutting.

[0025] The design of the edge unfolding and pressing wheel and the cutting film passage space effectively prevents the film strip from wrinkling during transportation, ensures the flatness of the film strip, improves the quality of the finished product, and the edge unfolding and pressing wheel applies slight pressure to the edge of the cut film strip to prevent the edge from folding or curling, ensuring that the cut film strip remains flat during transportation and avoiding subsequent processing problems caused by uneven edges.

[0026] The wiping cotton block and the upper wiping cotton block not only clean the surface of the cut film strip, but also prevent wrinkles by clamping the two edge sides of the cut film strip through centripetal clamping force. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0028] Figure 1 The figure is a structural schematic diagram of the present application;

[0029] Figure 2 The figure is an installation structure schematic diagram of the cutting blade of the present application;

[0030] Figure 3The utility model discloses a structure schematic diagram of the uncoiling prevention assembly of the slit film.

[0031] Figure 4 The utility model discloses a mounting structure schematic diagram of the U-shaped uncoiling passageway box.

[0032] Figure 5 The utility model discloses a mounting structure schematic diagram of the edge uncoiling down pressure wheel.

[0033] Figure 6 The utility model discloses a dismounting structure schematic diagram of the magnet block.

[0034] Mark explanation:

[0035] In the drawing: 1, film slit assembly; 2, film roll; 3, winding roller; 4, slit roller; 5, slit blade; 6, slit winding drum; 7, U-shaped support; 8, control distribution box; 9, first extension seat; 10, second extension seat; 11, winding motor; 12, slit film uncoiling prevention assembly; 13, linear guide rail seat; 14, L-shaped support column; 15, U-shaped uncoiling passageway box; 16, detachable top cover; 17, arc transition plate; 18, edge uncoiling down pressure wheel; 19, sliding block; 20, slit film passageway space; 21, anti-skid line; 22, fixed clamping groove; 23, lower wiping cotton block; 24, arc slope body; 25, handle; 26, upper wiping cotton block; 27, rounded corner part; 28, magnet block. Specific implementation

[0036] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, some technical features known in the art are not described to avoid obscuring the utility model.

[0037] Unless the direction defined separately is indicated, the directions such as up, down, left, right, front, back, inner and outer involved in the present utility model are based on the directions such as up, down, left, right, front, back, inner and outer in the drawing shown by the utility model, which is explained here.

[0038] The embodiment provides a plastic film slitting equipment as shown in Figures 1 to 6 The utility model discloses a plastic film slitting equipment, including: film slit assembly 1, film roll 2, winding roller 3, slit film uncoiling prevention assembly 12.

[0039] In the embodiment, the film slitting assembly 1 comprises a U-shaped support 7, two slitting rollers 4 installed in the U-shaped support 7 in a centripetal rotation manner, and a plurality of slitting blades 5 symmetrically arranged on the side of each slitting roller 4; the slitting roller 4 is installed with the slitting blade 5, and the precise cutting of the film roll 2 is realized by rotation, thereby ensuring the uniform width of each film strip.

[0040] In the embodiment, the film roll 2 is rotatably arranged on the back side of the slitting roller 4 and is unwound and conveyed from between the two slitting rollers 4; the winding roller 3 is rotatably arranged on the front side of the slitting roller 4 and is symmetrically installed with a plurality of slitting winding drums 6, which are used to receive the slitting film strips cut by the slitting blades 5 from between the two slitting rollers 4.

[0041] In the embodiment, the slitting film unwinding and winding prevention assembly 12 is arranged between the winding roller 3 and the slitting roller 4, and comprises a plurality of U-shaped unwinding passage boxes 15 for each slitting film strip to pass through, and two edge unwinding and pressing wheels 18 symmetrically and rotatably installed on the lower parts of the inner walls on both sides of the U-shaped unwinding passage box 15; each edge unwinding and pressing wheel 18 has a slitting film passage space 20 between the inner bottom wall of the U-shaped unwinding passage box 15 and the edge unwinding and pressing wheel 18, and the edge side of the slitting film strip is output from the U-shaped unwinding passage box 15 and is pressed by the edge unwinding and pressing wheel 18 from the slitting film passage space 20. The U-shaped unwinding passage box 15 provides a closed passage for each slitting film strip, prevents the film surface from being polluted by external dust, and also facilitates the control of the direction of the film strip. The edge unwinding and pressing wheel 18 applies slight pressure to the edge of the slitting film strip to prevent the edge from being folded and to keep the film strip flat. The slitting film passage space 20 provides sufficient space for the slitting film strip. Each edge unwinding and pressing wheel 18 is specifically provided with anti-slip lines 21 on the side thereof, and the anti-slip lines 21 are beneficial to increase the friction force with the edge side surface of the slitting film strip to prevent the edge side of the slitting film strip from being folded and wrinkled.

[0042] In this embodiment, the edge-expanding down-pressing wheel 18 is in rolling frictional contact with the surface of the slit film strip. When the entire film is drawn and transported from the winding roll 3, the slit film is cut into multiple slit film strips by the centripetally rotating slit blade 5. Each slit film strip passes through the adjacent U-shaped expanding passage box 15, and the two edge sides of the slit film strip are rolled and frictionally pressed and expanded by the edge-expanding down-pressing wheel 18. After the slit film strip passes through the U-shaped expanding passage box 15, it is wound onto the adjacent slit winding drum 6, thereby completing the slit winding. The design of the edge-expanding down-pressing wheel 18 and the slit film passage space 20 can stabilize the two edge sides of the slit film strip and prevent the two edge sides from being wrinkled due to tension and stress during the drawing and transportation of the slit film strip. This not only helps to improve the quality of the slit film strip, but also ensures the smooth winding of the slit film strip. The edge-expanding down-pressing wheel 18 is in rolling frictional contact with the edge surface of the slit film strip. This rolling contact method can apply a slight pressure to the edge of the film strip instead of static pressure, thereby avoiding excessive indentation or damage to the film strip. Through the slight pressure, the edge-expanding down-pressing wheel 18 can effectively prevent the curling of the edge of the film strip caused by uneven tension or stress concentration during transportation. This curling is often caused by uneven stretching or extrusion of the edge of the film strip. The slit film passage space 20 refers to the space inside the U-shaped expanding passage box 15, which provides a spacious passage for the slit film strip. Sufficient passage space can reduce the friction between the slit film strip and other components, thereby avoiding surface damage or deformation of the film strip caused by friction. This helps to maintain the flatness and integrity of the film strip. In addition, the design of the slit film passage space 20 allows the film strip to maintain a stable path during transportation. When the film strip passes through the U-shaped expanding passage box 15, the edge-expanding down-pressing wheel 18 and the slit film passage space 20 work together to ensure that the film strip advances along the predetermined path, avoiding deviation or distortion. By providing sufficient space, the slit film passage space 20 can reduce the stress concentration phenomenon of the film strip during transportation. This helps to prevent the edge of the film strip from curling or wrinkling due to excessive local stress.

[0043] In this embodiment, the top end of each U-shaped expanding passage box 15 is provided with a detachable top cover 16, and the slit film anti-winding expanding assembly 12 further includes a lower wiping cotton block 23 fixed to the inner bottom wall of the U-shaped expanding passage box 15 away from the edge-expanding down-pressing wheel 18, and an upper wiping cotton block 26 fixed to the inner wall of the detachable top cover 16; the bottom surface and the top surface of the slit film strip are wiped and cleaned by the lower wiping cotton block 23 and the upper wiping cotton block 26, respectively.

[0044] In this embodiment, the two side walls of the lower wiping cotton block 23 are attached to the two inner walls of the U-shaped unfolding passage box 15, and the upper wiping cotton block 26 is adapted and connected to the U-shaped unfolding passage box 15, so that the slit film strip rubs through between the lower wiping cotton block 23 and the upper wiping cotton block 26; the lower wiping cotton block 23 and the upper wiping cotton block 26 hold the flat slit film strip centripetally. The flat and wrinkle-free slit film strip is held by the lower wiping cotton block 23 and the upper wiping cotton block 26, which not only can clean the surface of the slit film strip, but also can prevent wrinkles by centripetal clamping force on the two edge sides of the slit film strip.

[0045] In this embodiment, the lower wiping cotton block 23 and the upper wiping cotton block 26 are arranged symmetrically.

[0046] In this embodiment, the lower wiping cotton block 23 is integrally connected with an arc-shaped slope body 24 on one side close to the edge unfolding lower pressing wheel 18, and the upper wiping cotton block 26 has a rounded corner part 27 close to one corner of the edge unfolding lower pressing wheel 18. The arc-shaped slope body 24 and the rounded corner part 27 are used to facilitate the smooth input of the slit film strip and prevent input jamming or landslides of the slit film strip.

[0047] In this embodiment, the arc-shaped transition plate 17 is fixedly connected to the outer wall of each U-shaped unfolding passage box 15 away from the lower wiping cotton block 23, and the arc-shaped transition plate 17 is used to facilitate the smooth conveying of the slit film strip into the U-shaped unfolding passage box 15.

[0048] In this embodiment, a plurality of linear guide seats 13 are arranged below the U-shaped unfolding passage boxes 15, and each U-shaped unfolding passage box 15 is fixed with a sliding block 19 sliding in the sliding channel of the linear guide seat 13. After adjusting the position of the U-shaped unfolding passage box 15, the linear guide seat 13 is connected with the sliding block 19 through adjusting bolts to fix the position of the sliding block 19. The linear guide seat 13 and the sliding block 19 allow the U-shaped unfolding passage box 15 to move along a linear path, so as to adjust the distance between the film strips and adapt to different width requirements.

[0049] In this embodiment, two L-shaped support columns 14 are fixed symmetrically on the bottom surface of the linear guide seat 13, and the ends of the two L-shaped support columns 14 away from the linear guide seat 13 are fixed to the outer wall of the U-shaped support 7.

[0050] In this embodiment, a fixed clamping groove 22 is formed on the top surface of each U-shaped unfolding passage box 15, and a magnet piece is bonded in each fixed clamping groove 22. The inner wall of the detachable top cover 16 is fixed with a magnet block 28 symmetrically, and when the detachable top cover 16 is covered on the U-shaped unfolding passage box 15, the magnet block 28 is clamped into the fixed clamping groove 22 and magnetically attracted and fixed with the magnet piece. Meanwhile, a handle 25 is fixed on the top surface of the detachable top cover 16.

[0051] In this embodiment, two first extension seats 9 are symmetrically fixed on the back outer wall of the U-shaped support 7, and the film roll 2 is rotatably installed between the two first extension seats 9. Two second extension seats 10 are symmetrically fixed on the front outer wall of the U-shaped support 7, and the winding roller 3 is rotatably installed between the two second extension seats 10. The outer wall of one of the second extension seats 10 is fixedly installed with a winding motor 11, and the output shaft of the winding motor 11 is connected with the winding roller 3 through a speed reducer. The winding motor 11 drives the winding roller 3 to rotate, so that the slit film strip can be uniformly wound on the winding roller 3, thereby improving the degree of automation. A control distribution box 8 is arranged on one side outer wall of the U-shaped support 7, and two drive motors (not shown in the figure) for driving the two slitting rollers 4 to rotate towards the center are arranged in the control distribution box 8. The control distribution box 8 also has a PLC (not shown in the figure) for controlling the opening and closing of various electronic devices in the scheme.

[0052] Working principle:

[0053] The plastic film slitting device, the film roll 2 starts to be unwound from the first extension seat 9 and transported to between the slitting rollers 4. The film roll 2 passes between the two slitting rollers 4, and the slitting blades 5 on the slitting rollers 4 accurately cut the film to divide the wide film into multiple narrow film strips. The slit film strip enters the U-shaped unwinding passage box 15 in the slit film unwinding anti-winding assembly 12 in turn. Inside the U-shaped unwinding passage box 15, the edge unwinding down pressure roller 18 applies slight pressure to the edge of the slit film strip to prevent the edge from folding or curling and ensure the flatness of the slit film strip. When the slit film strip passes through the U-shaped unwinding passage box 15, its bottom surface and top surface are wiped by the lower wiping cotton block 23 and the upper wiping cotton block 26 respectively, so as to remove dust and impurities on the surface and ensure the cleanliness of the slit film strip.

[0054] The slit film strip is guided through the arc-shaped transition plate 17 and the smooth fillet 27 to ensure smooth entry and exit of the slit film strip into and out of the U-shaped unwinding passage box 15, avoiding jamming or damage. The cleaned slit film strip is output from the U-shaped unwinding passage box 15 and accurately transported to the slit winding drum 6 on the winding roller 3 through the positioning of the linear guide seat 13 and the slider 19. The winding motor 11 drives the winding roller 3 to rotate, and the slit film strip is uniformly wound on the slit winding drum 6.

[0055] If it is necessary to adjust the position or spacing of the slit film strip, the slider 19 on the linear guide seat 13 can be adjusted to ensure that each film strip can be accurately wound on the corresponding slit winding drum 6.

[0056] It has to be noted that, in the present document, the terms "comprising", "including", and "having" should be interpreted as specifying the presence of the stated features but not precluding the presence of one or more other features. It should also be noted that, in the present document, the term "or" should be interpreted as the logical or, i.e. requiring at least one of the presented options to be true.

[0057] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A plastic film slitting apparatus characterized by comprising: The film slitting assembly (1) comprises a U-shaped support (7), two slitting rollers (4) which are installed in the U-shaped support (7) and rotate around the center, and a plurality of slitting blades (5) which are symmetrically arranged on the side of each slitting roller (4). The film roll (2) is rotatably arranged behind the slitting rollers (4) and is used to deliver the film from between the two slitting rollers (4). The winding roller (3) is rotatably arranged in front of the slitting rollers (4) and is symmetrically provided with a plurality of slitting winding drums (6) which are used to receive the slitting film strips which are cut by the slitting blades (5) and output from between the two slitting rollers (4). The slitting film unwinding and anti-winding assembly (12) comprises a plurality of U-shaped unwinding channel boxes (15) through which each slitting film strip passes, and two edge unwinding down rollers (18) which are symmetrically and rotatably installed on the lower parts of the inner walls of the two sides of the U-shaped unwinding channel boxes (15). Each of the edge unwinding down rollers (18) has a slitting film channel space (20) between the inner bottom wall of the U-shaped unwinding channel box (15) and the edge unwinding down roller (18). The edge side of the slitting film strip is output from the slitting film channel space (20) of the U-shaped unwinding channel box (15) and is rolled and rubbed by the edge unwinding down roller (18). The top end of each U-shaped unwinding channel box (15) is provided with a detachable top cover (16). The slitting film unwinding and anti-winding assembly (12) further comprises a lower wiping cotton block (23) which is fixed to the inner bottom wall of the U-shaped unwinding channel box (15) away from the edge unwinding down roller (18), and an upper wiping cotton block (26) which is fixed to the inner wall of the detachable top cover (16).

2. The plastic film slitting apparatus of claim 1, wherein: The two side outer walls of the lower wiping cotton block (23) are attached to the two inner walls of the U-shaped unwinding channel box (15). The upper wiping cotton block (26) is adapted to be connected to the U-shaped unwinding channel box (15), so that the slitting film strip rubs through the lower wiping cotton block (23) and the upper wiping cotton block (26).

3. The plastic film slitting apparatus of claim 2, wherein: The lower wiping cotton block (23) and the upper wiping cotton block (26) are used to hold the flat slitting film strip. The lower wiping cotton block (23) and the upper wiping cotton block (26) are symmetrically arranged.

4. The plastic film slitting apparatus of claim 3, wherein: The side of the lower wiping cotton block (23) close to the edge unwinding down roller (18) is integrally connected with an arc-shaped slope body (24). The corner of the upper wiping cotton block (26) close to the edge unwinding down roller (18) has a rounded corner part (27).

5. The plastic film slitting apparatus of claim 4, wherein: The side outer wall of each U-shaped unwinding channel box (15) away from the lower wiping cotton block (23) is fixedly connected with an arc-shaped transition plate (17).

6. The plastic film slitting apparatus of claim 5, wherein: A plurality of linear guide seats (13) are arranged below the U-shaped unwinding channel boxes (15). The bottom surface of each U-shaped unwinding channel box (15) is fixedly provided with a sliding block (19) which slides in the sliding channel of the linear guide seat (13).

7. The plastic film slitting apparatus of claim 6, wherein: The bottom surface of the linear guide seat (13) is symmetrically fixed with two L-shaped support columns (14). The ends of the two L-shaped support columns (14) away from the linear guide seat (13) are fixed to the outer wall of the U-shaped support (7).

8. The plastic film slitting apparatus of claim 7, wherein: ​ 9. The plastic film slitting apparatus of claim 8, wherein: The top surface of each U-shaped unfolding aisle box (15) is provided with a fixed clamping groove (22), and a magnet sheet is bonded in each fixed clamping groove (22); the inner wall of the detachable top cover (16) is fixed with a magnet block (28) on both sides symmetrically.

10. The plastic film slitting apparatus of claim 9, wherein: The back outer wall of the U-shaped support (7) is fixed with two first extension seats (9) symmetrically, and the film coiled material (2) is rotatably installed between the two first extension seats (9); the front outer wall of the U-shaped support (7) is fixed with two second extension seats (10) symmetrically, and the winding roller (3) is rotatably installed between the two second extension seats (10).

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