Slitting device for plastic film processing

Abstract

The invention relates to the technical field of plastic film processing, and discloses a slitting device for plastic film processing, the device comprises a platform, a plastic film main body and supporting columns fixedly installed on the periphery of the bottom of the platform, one side of the top of the platform is fixedly connected with a supporting plate, and the other side of the top of the platform is symmetrically and fixedly provided with fixing plates; the plastic film main bodies are rotationally installed between the two fixing plates in a coiled mode, a slitting assembly is arranged in the middle of the top of the platform, and a positioning assembly is arranged at the top of the side, away from the fixing plates, of the supporting plate; the pressing unit comprises a pressing plate and a scraping plate which can move up and down, and the cutting unit comprises a mounting plate and a blade which can linearly move in a reciprocating manner during descending, so that deformation of a plastic film main body during slitting is reduced, and the problems that when thick plastic films are slit, single-direction slitting is greatly hindered, and the slitting efficiency is high are solved. And the slitting efficiency and the slitting precision are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic film processing, and particularly to a slitting device for plastic film processing. Background Art

[0002] A plastic film is a thin film material with strong sealing performance and tensile performance. In order to maintain the beauty of the plastic film, it is often necessary to print the required patterns on both sides of the plastic film. After printing, a slitting machine is needed to slit the plastic film. Traditional processing equipment often has problems such as uneven cutting surfaces and low efficiency. The existing method of cutting with a tool from top to bottom or from left to right results in a single cutting direction for the plastic film, and the cutting stability is not high, which will affect the flatness of the cutting surface. Moreover, the tool directly contacts the plastic film during slitting, and plastic fragments and oil stains are easily left on the surface. If not cleaned in time, it will also affect the sharpness of the tool and the subsequent slitting effect of the plastic film.

[0003] For example, a plastic film slitting device with the publication number CN221089126U includes a support device and a slitting device. The slitting device is arranged on the support device. The support device includes a plastic film, a support frame, a support plate, an electric push rod, a cutting plate, and a cutting groove. The plastic film is rotatably connected to the support frame. The support plates are symmetrically and fixedly connected to the outside of the support frame. The electric push rod is fixedly installed at the top of the support plate. The cutting plate is fixedly connected to the support frame, and the two electric push rods are respectively located at both ends of the cutting plate. The cutting groove is opened on the upper surface of the cutting plate. By the fitting and extrusion of the cutting plate and the tool holder, the plastic film remains flat during cutting, and the blade runs smoothly, thus achieving a flat cut. However, the cutting direction of the cutting edge of this device is fixed. When dealing with the slitting of relatively thick plastic films, the slitting resistance in a single direction is large, which makes the extrusion force of the tool on the plastic film larger, more likely to cause uneven cutting of the plastic film, reducing the slitting efficiency and slitting accuracy. Moreover, after the tool slits, plastic fragments and oil stains are easily left on the surface. If not cleaned in time, it will also affect the sharpness of the tool and the subsequent slitting effect of the plastic film.

[0004] Therefore, a slitting device for plastic film processing is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a slitting device for plastic film processing to solve the problems that when dealing with the slitting of relatively thick plastic films, the slitting resistance in a single direction is large, reducing the slitting efficiency and slitting accuracy, and if the plastic fragments and oil stains remaining on the surface of the tool are not cleaned in time, it will also affect the sharpness of the tool and the subsequent slitting effect of the plastic film.

[0006] To achieve the above object, the present invention provides the following technical solutions: A slitting device for plastic film processing, including a platform, a plastic film body, and support columns fixedly installed around the bottom of the platform. One side of the top of the platform is fixedly connected with a support plate, and on the other side of the top of the platform, fixing plates are symmetrically and fixedly installed; It further includes: The plastic film body is rotatably installed in a roll between the two fixing plates. A slitting assembly is arranged in the middle of the top of the platform, and a positioning assembly is arranged at the top of the side of the support plate away from the fixing plate; The slitting assembly includes a pressing unit, a cutting unit, and an auxiliary unit. The pressing unit includes a pressing plate and a scraping plate that can move up and down. The cutting unit includes a mounting plate and a blade that can reciprocate linearly when descending, reducing the deformation of the plastic film body during slitting and improving the flatness of the cut surface of the plastic film body; The slitting assembly includes a fixed rod and a top plate. The bottom end of the fixed rod is fixedly connected to the platform, and the top plate is fixedly installed at the top end of the fixed rod. A driving motor is fixedly installed on one side of the top of the top plate. The output end of the driving motor passes through the top plate and is fixedly connected to a lead screw. A cross plate is installed between the lead screw and the fixed rod. The mounting plate and the blade are slidably installed at the bottom of the cross plate.

[0007] Preferably, the bottom end of the lead screw is rotatably connected to the platform, the top end of the lead screw is rotatably connected to the top plate, the cross plate is slidably connected to the fixed rod, the cross plate is threadedly connected to the lead screw, four sides of the inside of the cross plate are symmetrically and slidably connected with sliding rods, the bottom ends of the two longitudinal sliding rods are fixedly connected to the same pressing plate, the scraping plate is fixedly connected to the pressing plate, and the two scraping plates are attached to the outer sides of the blade.

[0008] By adopting the above technical solution, the bottom of the pressing plate presses on the surface of the plastic film body, realizing that the blade reciprocates while descending for slitting, improving the slitting efficiency of the blade for the relatively thick plastic film body.

[0009] Preferably, a first spring is sleeved on the outer side of the lower part of the sliding rod. The two ends of the first spring are respectively fixedly connected to the cross plate and the pressing plate. Top grooves are symmetrically formed in the inside of the cross plate. A slide rail is fixedly connected to the middle of the bottom of the cross plate. The mounting plate is slidably connected to the slide rail. The blade is fixedly installed at the bottom of the mounting plate. Vertical plates are symmetrically and fixedly connected to the top of the mounting plate. The vertical plates are slidably connected to the cross plate. The vertical plates are located inside the top grooves. A second spring is fixedly connected between one side of the vertical plate and the inner wall of the top groove.

[0010] By adopting the above technical solution, the slide rail limits the mounting plate, keeping the mounting plate and the blade sliding smoothly and reciprocatingly.

[0011] Preferably, an inner plate is fixedly connected between the two horizontal sliding rods. The inner plate is located inside the top groove. A pressing plate is fixedly connected to the side of the vertical plate close to the inner plate. Arc-shaped strips are fixedly connected to the side of the inner plate close to the vertical plate from top to bottom at equal intervals. The arc-shaped strips on both inner plates are arranged at intervals and staggered, facilitating the longitudinal and horizontal reciprocating movement of the pressing plate and the vertical plate during the descending process.

[0012] By adopting the above technical solution, when the arc-shaped strip on one side presses the pressing plate, the arc-shaped strip on the other side does not press the pressing plate, causing the vertical plate to move longitudinally and horizontally in a reciprocating manner during the descending process. The vertical plate moves to compress or stretch the second spring, and the second spring assists the movement and reset of the vertical plate.

[0013] Preferably, the auxiliary unit includes fixed cylinders fixedly installed around the top of the cross plate. The number of fixed cylinders is the same as that of the sliding rods. The top end of the sliding rod is fixedly connected with a U-shaped rod. The end of the U-shaped rod far from the sliding rod passes through the top of the fixed cylinder and is fixedly connected with a piston. The piston fits with the inner wall of the fixed cylinder. The bottom of the fixed cylinder is connected with a connecting hose. Adsorption grooves are symmetrically formed on one side of the bottom of the pressing plate. The end of the connecting hose far from the fixed cylinder is communicated with the adsorption groove.

[0014] By adopting the above technical solution, the cross plate drives the fixed cylinder to press down. The sliding rod and the U-shaped rod remain stationary. The U-shaped rod pumps air out of the fixed cylinder through the piston, making the connecting hose and the adsorption groove in a negative pressure state, thus facilitating better fixation of the plastic film body.

[0015] Preferably, an installation groove is formed on the other side of the bottom of the pressing plate. A rotating shaft is rotatably installed inside the installation groove. A strip plate is fixedly connected to the outer side of the middle part of the rotating shaft. Torsion springs are symmetrically sleeved on the outer side of the rotating shaft. The two ends of each torsion spring are respectively fixedly connected with the rotating shaft and the inner wall of the installation groove. A contact roller is rotatably installed on the side of the strip plate far from the rotating shaft.

[0016] By adopting the above technical solution, the contact roller at the bottom of the pressing plate first contacts the surface of the plastic film body. The contact roller is pressed by the plastic film body and will rotate and retract into the installation groove. The contact roller drives the strip plate and the rotating shaft to rotate. The rotating shaft acts on the torsion spring, and the torsion spring is used for the subsequent rotation and reset of the strip plate. The contact rollers on both sides facilitate the unfolding and smoothing of the plastic film body.

[0017] Preferably, the positioning component includes a fixed frame and symmetrically arranged installation strips. The bottom surface of the installation strip is fixedly connected to the platform. The two installation strips are respectively located on the front and rear sides of the support plate. A stepped groove is formed on the top of the installation strip. The fixed frame is in an inverted U shape.

[0018] By adopting the above technical solution, the fixed frame can be slidably adjusted in the installation strip to use at different positions.

[0019] Preferably, both bottom ends of the fixing frame are fixedly connected with step blocks, the step blocks are slidably connected with step grooves, and electric push rods are symmetrically and fixedly installed at the top of the fixing frame.

[0020] By adopting the above technical solution, the electric push rod drives the side pressing strip to press downwards, and the side pressing strip drives the rubber strip at the bottom to press the plastic film body tightly, so as to facilitate the fixing of the plastic film body.

[0021] Preferably, there are no less than three electric push rods. The telescopic ends of the three electric push rods are fixedly connected with the same side pressing strip. A rubber strip is fixedly connected to the bottom of the side pressing strip. Tightening bolts are threadedly connected to the lower parts of both sides of the fixing frame, and the tightening bolts are abutted against the top of the installation strip.

[0022] By adopting the above technical solution, after adjusting the position of the fixing frame, the operator tightens the tightening bolt to press on the installation strip, which is convenient for fixing the position of the fixing frame.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. A slitting assembly is provided. The operator rotates and installs the rolled plastic film body between the fixing plates, pulls one side of the plastic film body through the lower part of the pressing plate, adjusts the slitting position of the plastic film body, and tightly fixes one end of the plastic film body through the positioning assembly. Then, the driving motor is started to work. The driving motor drives the lead screw to rotate, so that the cross plate moves downward. The cross plate drives the mounting plate and the blade to press down. Moreover, the cross plate can drive the pressing plate to press down through the sliding rod and the first spring. The pressing plate drives the contact roller at the bottom to first contact the surface of the plastic film body. The contact roller is squeezed by the plastic film body and will rotate and retract into the installation groove. The contact roller drives the strip plate and the rotating shaft to rotate. The rotating shaft acts on the torsion spring, and the torsion spring is used for the subsequent rotation and reset of the strip plate. The contact rollers on both sides are convenient for unfolding and flattening the plastic film body until the bottom of the pressing plate presses on the surface of the plastic film body and the blade contacts the plastic film body. Then, the cross plate continues to descend. The cross plate compresses the first spring. The cross plate drives the mounting plate and the vertical plate to descend. The vertical plate drives the abutting plate to descend. Since the arc-shaped strips on both sides are arranged at intervals and staggered, and are evenly distributed from top to bottom, when one side of the arc-shaped strip squeezes the abutting plate, the arc-shaped strip on the other side does not squeeze the abutting plate, so that the vertical plate will move horizontally and reciprocally longitudinally during the descending process. The vertical plate moves to compress or stretch the second spring, and the second spring assists the movement of the vertical plate. The two vertical plates move to drive the mounting plate and the blade to move reciprocally, so as to realize the reciprocating movement of the blade while descending for slitting, improve the slitting efficiency of the blade for the relatively thick plastic film body, and the reciprocating movement distance of the blade is small, reducing the deformation of the plastic film body and improving the flatness of the cut surface of the plastic film body, solving the problem that when dealing with the slitting of relatively thick plastic films, the slitting in a single direction has a large resistance, reducing the slitting efficiency and slitting accuracy; 2. When the pressing plate presses against the main body of the plastic film and the adsorption groove presses against the top surface of the main body of the plastic film, while the cross plate continues to descend, the cross plate drives the fixed cylinder to press downwards. The sliding rod and the U-shaped rod remain stationary, and the U-shaped rod pumps air out of the fixed cylinder through the piston, making the connecting hose and the adsorption groove in a negative pressure state, thus facilitating better fixation of the main body of the plastic film. The length, width, and height dimensions of the adsorption groove do not exceed one centimeter, so as to further position and press the main body of the plastic film when the blade reciprocates for cutting. When the blade rises and resets later, the scraper on the inner side of the pressing plate scrapes and cleans the outer side of the blade, reducing the dirt adhered to the surface of the blade, and solving the problem that if the plastic fragments and oil stains remaining on the surface of the tool are not cleaned in time, it will also affect the sharpness of the tool and the subsequent plastic film cutting effect; 3. A positioning component is provided. When positioning one end of the main body of the plastic film, the operator adjusts the cutting position of the main body of the plastic film to be directly below the blade, loosens the tightening bolts on both sides, and pulls the fixed frame to move horizontally and transversely inside the installation strip. A step block is provided at the bottom of the fixed frame, and a step groove is opened inside the installation strip to prevent the fixed frame from slipping out. The fixed frame drives the electric push rod and the side pressing strip to move until the side pressing strip is located above one end of the main body of the plastic film. At this time, the operator tightens the tightening bolts to press on the installation strip to fix the position of the fixed frame, and then starts the electric push rod. The electric push rod drives the side pressing strip to press downwards, and the side pressing strip drives the rubber strip at the bottom to press the main body of the plastic film, thus facilitating the fixation of one end of the main body of the plastic film. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the mounting structure of the pallet of the present invention; Figure 2 Schematic diagram of the first three-dimensional overall structure of the present invention; Figure 3 Schematic diagram of the second three-dimensional overall structure of the present invention; Figure 4 of the present invention Figure 1 Enlarged structure schematic diagram at A in; Figure 5 Schematic diagram of the cross-sectional view of the cross plate of the present invention; Figure 6 of the present invention Figure 5 Enlarged structure schematic diagram at B in; Figure 7 Schematic diagram of the cross-sectional view of the fixed cylinder of the present invention; Figure 8 of the present invention Figure 7 Enlarged structure schematic diagram at C in; Figure 9 Schematic diagram of the mounting structure of the arc-shaped strip of the present invention; Figure 10 Exploded schematic diagram of the mounting structure of the cross plate of the present invention; Figure 11Schematic diagram of the blade mounting structure of the present invention; Figure 12 Schematic diagram of the pressing plate in the downward pressing state of the present invention; Figure 13 Schematic diagram of the side pressing strip mounting structure of the present invention; Figure 14 Schematic diagram of the tightening bolt mounting structure of the present invention.

[0025] In the figure: 1, platform; 2, support column; 3, support plate; 4, fixing plate; 5, plastic film main body; 6, slitting assembly; 61, fixing rod; 62, top plate; 63, drive motor; 64, lead screw; 65, cross plate; 66, slide bar; 67, pressing plate; 68, scraping plate; 69, first spring; 610, top groove; 611, slide rail; 612, mounting plate; 613, blade; 614, vertical plate; 615, second spring; 616, tightening plate; 617, inner plate; 618, arc bar; 619, fixing cylinder; 620, U-shaped rod; 621, piston; 622, connecting hose; 623, adsorption groove; 624, mounting groove; 625, rotating shaft; 626, strip plate; 627, torsion spring; 628, contact roller; 7, positioning assembly; 71, mounting strip; 72, fixing frame; 73, electric push rod; 74, side pressing strip; 75, tightening bolt. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1 - 3 , the present invention provides a technical solution: a slitting device for plastic film processing, including a platform 1, a plastic film main body 5, and support columns 2 fixedly installed around the bottom of the platform 1. A support plate 3 is fixedly connected to one side of the top of the platform 1, and fixing plates 4 are symmetrically and fixedly installed on the other side of the top of the platform 1.

[0028] The plastic film main body 5 is rotatably installed in a rolled-up state between the two fixing plates 4.

[0029] A slitting assembly 6 is arranged in the middle of the top of the platform 1. The slitting assembly 6 includes a pressing unit, a cutting unit, and an auxiliary unit. The pressing unit includes a pressing plate 67 and a scraping plate 68 that can move up and down. The cutting unit includes a mounting plate 612 and a blade 613 that can move reciprocally in a straight line when descending, reducing the deformation of the plastic film main body 5 during slitting and improving the flatness of the cut surface of the plastic film main body 5.

[0030] The slitting assembly 6 includes a fixed rod 61 and a top plate 62. The bottom end of the fixed rod 61 is fixedly connected to the platform 1, and the top plate 62 is fixedly installed at the top end of the fixed rod 61. A driving motor 63 is fixedly installed on one side of the top of the top plate 62. The output end of the driving motor 63 passes through the top plate 62 and is fixedly connected to a lead screw 64. A cross plate 65 is installed between the lead screw 64 and the fixed rod 61. The mounting plate 612 and the blade 613 are slidably installed at the bottom of the cross plate 65.

[0031] The bottom end of the lead screw 64 is rotatably connected to the platform 1, the top end of the lead screw 64 is rotatably connected to the top plate 62. The cross plate 65 is slidably connected to the fixed rod 61, the cross plate 65 is threadedly connected to the lead screw 64. Four slide bars 66 are symmetrically and slidably connected to the inner periphery of the cross plate 65. The bottom of the two longitudinal slide bars 66 is fixedly connected to the same pressing plate 67. The scraping plate 68 is fixedly connected to the pressing plate 67. The two scraping plates 68 are attached to the outer sides of the blades 613.

[0032] A first spring 69 is sleeved on the outer side of the lower part of the slide bar 66. The two ends of the first spring 69 are respectively fixedly connected to the cross plate 65 and the pressing plate 67. Top grooves 610 are symmetrically formed in the inner part of the cross plate 65. A slide rail 611 is fixedly connected to the middle of the bottom of the cross plate 65. The mounting plate 612 is slidably connected to the slide rail 611. The blade 613 is fixedly installed at the bottom of the mounting plate 612. Vertical plates 614 are symmetrically and fixedly connected to the top of the mounting plate 612. The vertical plates 614 are slidably connected to the cross plate 65. The vertical plates 614 are located inside the top grooves 610. A second spring 615 is fixedly connected between one side of the vertical plate 614 and the inner wall of the top groove 610.

[0033] An inner plate 617 is fixedly connected between the two transverse slide bars 66. The inner plate 617 is located inside the top groove 610. A pressing plate 616 is fixedly connected to the side of the vertical plate 614 close to the inner plate 617. Arc-shaped strips 618 are uniformly fixedly connected to the side of the inner plate 617 close to the vertical plate 614 from top to bottom. The arc-shaped strips 618 on the two inner plates 617 on both sides are arranged at intervals and staggered, so that the pressing plate 616 and the vertical plate 614 will move horizontally and reciprocally in the longitudinal direction during the descending process.

[0034] The auxiliary unit includes fixing cylinders 619 fixedly installed around the top of the cross plate 65. The number of the fixing cylinders 619 is the same as that of the slide bars 66. The top end of the slide bar 66 is fixedly connected to a U-shaped rod 620. One end of the U-shaped rod 620 away from the slide bar 66 passes through the top of the fixing cylinder 619 and is fixedly connected to a piston 621. The piston 621 is attached to the inner wall of the fixing cylinder 619. A connecting hose 622 is connected to the bottom of the fixing cylinder 619. Suction grooves 623 are symmetrically formed on one side of the bottom of the pressing plate 67. The end of the connecting hose 622 away from the fixing cylinder 619 is communicated with the suction groove 623.

[0035] On the other side of the bottom of the pressing plate 67, an installation groove 624 is formed. A rotating shaft 625 is rotatably installed inside the installation groove 624. A strip plate 626 is fixedly connected to the outer side of the middle part of the rotating shaft 625. The outer side of the rotating shaft 625 is symmetrically sleeved with torsion springs 627. The two ends of the torsion springs 627 are respectively fixedly connected to the rotating shaft 625 and the inner wall of the installation groove 624. A contact roller 628 is rotatably installed on the side of the strip plate 626 away from the rotating shaft 625.

[0036] Embodiment 1: As Figures 4 - 6 and Figures 8 - 12 shown, the operator rotatably installs the rolled plastic film body 5 between the fixed plates 4, pulls one side of the plastic film body 5 through the lower part of the pressing plate 67, adjusts the slitting position of the plastic film body 5, and presses and fixes one end of the plastic film body 5 through the positioning assembly 7. Then, the driving motor 63 is started to work. The driving motor 63 drives the lead screw 64 to rotate, so that the cross plate 65 moves downward. The cross plate 65 drives the mounting plate 612 and the blade 613 to press downward. Moreover, the cross plate 65 can drive the pressing plate 67 to press downward through the sliding rod 66 and the first spring 69. The pressing plate 67 drives the contact roller 628 at the bottom to first contact the surface of the plastic film body 5. The contact roller 628 is extruded by the plastic film body 5 and will rotate and be received into the installation groove 624. The contact roller 628 drives the strip plate 626 and the rotating shaft 625 to rotate. The rotating shaft 625 acts on the torsion spring 627, and the torsion spring 627 is used for the subsequent rotation and reset of the strip plate 626. The contact rollers 628 on both sides are convenient for unfolding and flattening the plastic film body 5.

[0037] Until the bottom of the pressing plate 67 presses on the surface of the plastic film body 5 and the blade 613 contacts the plastic film body 5. Then, the cross plate 65 continues to descend. The cross plate 65 compresses the first spring 69. The cross plate 65 drives the vertical plate 614 to descend. The vertical plate 614 drives the abutting plate 616 to descend. Since the arc-shaped strips 618 on both sides are arranged at intervals and staggered, and are evenly distributed from top to bottom, when one side of the arc-shaped strips 618 presses the abutting plate 616, the arc-shaped strips 618 on the other side do not press the abutting plate 616, so that the vertical plate 614 will move horizontally and reciprocally longitudinally during the descending process. The vertical plate 614 moves to compress or stretch the second spring 615. The second spring 615 assists the movement of the vertical plate 614. The two vertical plates 614 move to drive the mounting plate 612 and the blade 613 to move reciprocally, so as to realize that the blade 613 cuts while descending and reciprocating, improving the slitting efficiency of the blade 613 for the relatively thick plastic film body 5. Moreover, the reciprocating movement distance of the blade 613 is small, reducing the deformation of the plastic film body 5 and improving the flatness of the cut surface of the plastic film body 5, solving the problem that when cutting a relatively thick plastic film, the single-direction cutting has a large obstacle, reducing the slitting efficiency and slitting accuracy.

[0038] On the top of the side of the pallet 3 away from the fixed plate 4, a positioning component 7 is provided. The positioning component 7 includes a fixing frame 72 and symmetrically arranged mounting bars 71. The bottom surface of the mounting bar 71 is fixedly connected to the platform 1. The two mounting bars 71 are respectively located on the front and rear sides of the pallet 3. A step groove is formed at the top of the mounting bar 71, and the fixing frame 72 is in an inverted U shape.

[0039] Both bottom ends of the fixing frame 72 are fixedly connected with step blocks, and the step blocks are slidably connected to the step grooves. Electric push rods 73 are symmetrically and fixedly installed at the top of the fixing frame 72.

[0040] There are no less than three electric push rods 73. The telescopic ends of the three electric push rods 73 are fixedly connected to the same side pressing strip 74. A rubber strip is fixedly connected to the bottom of the side pressing strip 74. Tightening bolts 75 are threadedly connected to the lower parts of both sides of the fixing frame 72, and the tightening bolts 75 are abutted against the top of the mounting bar 71.

[0041] Embodiment 2: As Figures 7 - 8 shown, when the pressing plate 67 abuts against the plastic film body 5 and the adsorption groove 623 presses against the top surface of the plastic film body 5, while the cross plate 65 continues to descend, the cross plate 65 drives the fixed cylinder 619 to press down. The sliding rod 66 and the U-shaped rod 620 remain stationary. The U-shaped rod 620 pumps air out of the fixed cylinder 619 through the piston 621, so that the connecting hose 622 and the adsorption groove 623 are in a negative pressure state, thus facilitating better fixing of the plastic film body 5. The length, width, and height dimensions of the adsorption groove 623 do not exceed one centimeter, so as to further position and press the plastic film body 5 when the blade 613 reciprocates for cutting. When the blade 613 rises and resets later, the scraper 68 inside the pressing plate 67 scrapes and cleans the outer side of the blade 613, reducing the dirt adhered to the surface of the blade 613 and solving the problem that if the plastic fragments and oil stains remaining on the tool surface are not cleaned in time, it will also affect the sharpness of the tool and the subsequent plastic film cutting effect.

[0042] Embodiment 3: As Figures 13 - 14 shown, when positioning one end of the plastic film body 5, the operator adjusts the cutting position of the plastic film body 5 to be directly below the blade 613, loosens the tightening bolts 75 on both sides, and pulls the fixing frame 72 to horizontally move inside the mounting bar 71. A step block is provided at the bottom of the fixing frame 72, and a step groove is formed inside the mounting bar 71 to prevent the fixing frame 72 from coming out. The fixing frame 72 drives the electric push rods 73 and the side pressing strip 74 to move until the side pressing strip 74 is located above one end of the plastic film body 5. At this time, the operator tightens the tightening bolts 75 to press on the mounting bar 71 to fix the position of the fixing frame 72, and then starts the electric push rod 73. The electric push rod 73 drives the side pressing strip 74 to press down, and the side pressing strip 74 drives the rubber strip at the bottom to press the plastic film body 5, thus facilitating the fixing of one end of the plastic film body 5.

[0043] Working principle: When using this device, first, as Figures 1 - 14 shown, the operator rotatably installs the roll of plastic film body 5 between the fixed plates 4, pulls one side of the plastic film body 5 through the lower part of the pressing plate 67, and horizontally moves the fixing frame 72 horizontally inside the mounting strip 71 until the side pressing strip 74 is located above one end of the plastic film body 5. At this time, the operator tightens the fastening bolt 75 to press on the mounting strip 71, and the electric push rod 73 drives the side pressing strip 74 to press down. The side pressing strip 74 drives the rubber strip at the bottom to press one end of the plastic film body 5. Then, the driving motor 63 is started to work. The driving motor 63 drives the lead screw 64 to rotate, causing the cross plate 65 to move downward. The cross plate 65 drives the mounting plate 612 and the blade 613 to press down. Moreover, the cross plate 65 can drive the pressing plate 67 to press down through the slide rod 66 and the first spring 69. The contact rollers 628 on both sides facilitate the unfolding and smoothing of the plastic film body 5. The blade 613 reciprocates while descending, improving the cutting efficiency of the blade 613 for the relatively thick plastic film body 5. When the pressing plate 67 presses against the plastic film body 5, the cross plate 65 will also drive the fixed cylinder 619 to press down. The slide rod 66 and the U-shaped rod 620 do not move. The U-shaped rod 620 evacuates the fixed cylinder 619 through the piston 621, making the connecting hose 622 and the adsorption groove 623 in a negative pressure state, thus facilitating better fixation of the plastic film body 5, and further positioning and pressing the plastic film body 5 when the blade 613 reciprocates for cutting. When the blade 613 rises and resets later, the scraper 68 inside the pressing plate 67 scrapes and cleans the outside of the blade 613, reducing the dirt adhered to the surface of the blade 613.

[0044] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A slitting device for plastic film processing, comprising a platform (1), a plastic film body (5), and support columns (2) fixedly installed around the bottom of the platform (1). One side of the top of the platform (1) is fixedly connected to a support plate (3), and on the other side of the top of the platform (1), fixing plates (4) are symmetrically and fixedly installed. It is characterized in that It further includes: The plastic film body (5) is rotatably installed in a roll between the two fixing plates (4). A slitting assembly (6) is arranged in the middle of the top of the platform (1), and a positioning assembly (7) is arranged at the top of the side of the support plate (3) away from the fixing plate (4). The slitting assembly (6) includes a pressing unit, a cutting unit, and an auxiliary unit. The pressing unit includes a pressing plate (67) and a scraping plate (68) that can move up and down. The cutting unit includes a mounting plate (612) and a blade (613) that can move in a reciprocating straight line when descending, reducing the deformation of the plastic film body (5) during slitting and improving the flatness of the cut surface of the plastic film body (5). The slitting assembly (6) includes a fixed rod (61) and a top plate (62). The bottom end of the fixed rod (61) is fixedly connected to the platform (1), and the top plate (62) is fixedly installed at the top end of the fixed rod (61). On one side of the top of the top plate (62), a driving motor (63) is fixedly installed. The output end of the driving motor (63) passes through the top plate (62) and is fixedly connected to a lead screw (64). A cross plate (65) is installed between the lead screw (64) and the fixed rod (61). The mounting plate (612) and the blade (613) are slidably installed at the bottom of the cross plate (65).

2. The slitting device for plastic film processing according to claim 1, characterized in that: The bottom end of the lead screw (64) is rotatably connected to the platform (1), the top end of the lead screw (64) is rotatably connected to the top plate (62), the cross plate (65) is slidably connected to the fixed rod (61), the cross plate (65) is threadedly connected to the lead screw (64). Four sides of the inside of the cross plate (65) are symmetrically and slidably connected to sliding rods (66). The bottoms of the two longitudinal sliding rods (66) are fixedly connected to the same pressing plate (67). The scraping plate (68) is fixedly connected to the pressing plate (67). The two scraping plates (68) are attached to the outer sides of the blade (613).

3. The slitting device for plastic film processing according to claim 2, wherein: A first spring (69) is sleeved on the outer side of the lower part of the sliding rod (66). The two ends of the first spring (69) are respectively fixedly connected to the cross plate (65) and the pressing plate (67). Top grooves (610) are symmetrically formed in the inside of the cross plate (65). A slide rail (611) is fixedly connected to the middle of the bottom of the cross plate (65). The mounting plate (612) is slidably connected to the slide rail (611). The blade (613) is fixedly installed at the bottom of the mounting plate (612). Vertical plates (614) are symmetrically and fixedly connected to the top of the mounting plate (612). The vertical plates (614) are slidably connected to the cross plate (65). The vertical plates (614) are located inside the top grooves (610). A second spring (615) is fixedly connected between one side of the vertical plate (614) and the inner wall of the top groove (610).

4. A slitting device for plastic film processing according to claim 3, wherein: A inner plate (617) is fixedly connected between the two horizontal slide bars (66). The inner plate (617) is located inside the top groove (610). A pressing plate (616) is fixedly connected to one side of the vertical plate (614) close to the inner plate (617). Arc-shaped strips (618) are uniformly and fixedly connected to one side of the inner plate (617) close to the vertical plate (614) from top to bottom. The arc-shaped strips (618) on the two inner plates (617) are arranged at intervals and staggered, facilitating the pressing plate (616) and the vertical plate (614) to move horizontally and reciprocally in the longitudinal direction during the descending process.

5. The slitting device for plastic film processing according to claim 4, characterized in that: The auxiliary unit includes fixing cylinders (619) fixedly installed around the top of the cross plate (65). The number of the fixing cylinders (619) is the same as that of the slide bars (66). The top end of the slide bar (66) is fixedly connected with a U-shaped rod (620). One end of the U-shaped rod (620) far from the slide bar (66) passes through the top of the fixing cylinder (619) and is fixedly connected with a piston (621). The piston (621) fits with the inner wall of the fixing cylinder (619). The bottom of the fixing cylinder (619) is connected with a connecting hose (622). Suction grooves (623) are symmetrically formed on one side of the bottom of the pressing plate (67). One end of the connecting hose (622) far from the fixing cylinder (619) is communicated with the suction groove (623).

6. A slitting device for plastic film processing according to claim 5, characterized in that: On the other side of the bottom of the pressing plate (67), an installation groove (624) is formed. A rotating shaft (625) is rotatably installed inside the installation groove (624). A strip plate (626) is fixedly connected to the outer side of the middle part of the rotating shaft (625). Torsion springs (627) are symmetrically sleeved on the outer side of the rotating shaft (625). The two ends of the torsion spring (627) are respectively fixedly connected with the rotating shaft (625) and the inner wall of the installation groove (624). A contact roller (628) is rotatably installed on one side of the strip plate (626) far from the rotating shaft (625).

7. A slitting device for plastic film processing according to claim 1, characterized in that: The positioning assembly (7) includes a fixing frame (72) and symmetrically arranged installation strips (71). The bottom surface of the installation strip (71) is fixedly connected with the platform (1). The two installation strips (71) are respectively located on the front and rear sides of the support plate (3). A stepped groove is formed at the top of the installation strip (71). The fixing frame (72) is in an inverted U shape.

8. A slitting device for plastic film processing according to claim 7, characterized in that: Step blocks are fixedly connected to the two bottom ends of the fixing frame (72). The step blocks are slidably connected with the stepped grooves. Electric push rods (73) are symmetrically and fixedly installed at the top of the fixing frame (72).

9. The slitting device for plastic film processing according to claim 8, wherein: There are no less than three electric push rods (73). The telescopic ends of the three electric push rods (73) are fixedly connected with the same side pressing strip (74). A rubber strip is fixedly connected to the bottom of the side pressing strip (74). Tightening bolts (75) are threadedly connected to the lower parts of the two sides of the fixing frame (72). The tightening bolts (75) are abutted against the top of the installation strip (71).

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