Slitting equipment for protective film and using method of slitting equipment

Abstract

The invention relates to the field of protective film production equipment, in particular to slitting equipment for a protective film and a using method thereof.The slitting equipment comprises a machine body, and a material containing device and a slitting device are arranged on the machine body; the material placing device comprises an inflatable shaft which is arranged on the machine body and is used for placing a film roll to be slit; the slitting device comprises a slitting mechanism, the slitting mechanism comprises a saw blade protective cover, and a slitting saw blade is arranged in the saw blade protective cover; a saw blade protection structure is arranged in the saw blade protection cover; through cooperative use of the material placing device and the slitting device, slitting operation of a film roll can be achieved; due to the arrangement of the saw blade protection structure, the felt layer is soaked in water, the slitting saw blade can be cooled, and meanwhile, the felt layer is attached to the slitting saw blade; and the felt layer can serve as a scraping block, sundries on the slitting saw blade can be scraped away, and then the flatness of the slitting position of the slitting film roll can be better guaranteed.

Description

Technical Field

[0001] The invention relates to the field of protective film production equipment, in particular to a protective film slitting device and a use method thereof. Background Art

[0002] When producing and processing the protective film, a slitting machine is needed, and then the rolled protective film is cut according to the specifications required by the product to finally obtain the finished product.

[0003] Traditional slitting machines have the following problems:

[0004] During the protective film slitting process, film waste will be blown up due to the high-speed rotation of the cutting knife and the cutting force, forming dust and waste chips; these waste chips not only easily pollute the working environment, but may also be inhaled by the operator, causing potential harm to his health.

[0005] During the protective film slitting process, a large amount of heat may be generated due to friction and cutting force, causing the temperature of the cutting area to rise. Excessive temperature may not only affect the cutting quality, but also cause thermal damage to the equipment and shorten its service life.

[0006] The existing patent 201821942755.3 - Device for conveniently transporting protective film and waste removal for slitting machine does not clearly disclose the technical content for solving the above technical problems.

[0007] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing slitting machine. Summary of the invention

[0008] The object of the present invention is to provide a slitting device for a protective film which can reduce or avoid the presence of foreign matter on a slitting saw blade.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A slitting device for a protective film comprises a machine body, on which a material placing device and a slitting device are provided;

[0011] The material placement device includes an inflatable shaft arranged on the machine body for placing the film roll to be slit;

[0012] The slitting device comprises a slitting mechanism, the slitting mechanism comprises a saw blade guard, a slitting saw blade is arranged in the saw blade guard; the slitting saw blade is connected to a slitting drive mechanism; the slitting drive mechanism can control the rotation of the slitting saw blade; the slitting drive mechanism is connected to the machine body through an operating module;

[0013] A saw blade protection structure is provided in the saw blade guard;

[0014] The saw blade protection structure comprises a connecting plate arranged on the saw blade guard, and a felt layer is arranged on the connecting plate; the felt layer passes through the saw blade guard and presses against the slitting saw blade.

[0015] The saw blade guard comprises two side plates, one end of which is connected by a connecting plate; the horizontal cross section of the saw blade guard is U-shaped; and a saw blade protection structure is respectively provided on the two side plates.

[0016] The slitting equipment also includes a cleaning device, which includes a mixing pipe, which is connected to an external pipe; the opening of the external pipe faces the felt layer; the mixing pipe is connected to a liquid supply structure and an air supply structure at one end away from the external pipe; the liquid supply structure is used to supply liquid into the mixing pipe; the air supply structure is used to supply air into the mixing pipe.

[0017] The air supply structure includes an air pump connected to the mixing pipe; the liquid supply structure includes a water tank; the water tank is connected to the mixing pipe through a liquid spray pump; the air pump is connected to the mixing pipe through an air outlet pipe, and the liquid spray pump is connected to the mixing pipe through a water outlet pipe; the liquid spray pump is connected to the water tank through a water inlet pipe.

[0018] The air outlet pipe, the water outlet pipe and the mixing pipe are connected through a three-way pipe.

[0019] A one-way valve is provided at the connection end of the three-way pipe and the air outlet pipe and / or the water outlet pipe.

[0020] The three-way pipe includes a pipe body, on which a first outlet, a second outlet and a third outlet are provided. The first outlet is connected to an air outlet pipe; the second outlet is connected to a water outlet pipe; the third outlet is connected to a mixing pipe; the first outlet is a frustum-shaped hole; the second outlet is an inclined hole, and the inclination direction is toward the third outlet.

[0021] The slitting equipment also includes a film cylinder positioning device, which includes a push sleeve, the inner diameter of which is larger than the inflatable shaft; the push sleeve is coaxially arranged with the inflatable shaft; and the push sleeve is sleeved on the inflatable shaft.

[0022] The pushing sleeve is connected with an adjusting mechanism.

[0023] A method for using a protective film slitting device, the method comprising the following steps:

[0024] Step 1: Determine the film roll to be slit;

[0025] Step 2: Place the film roll to be slit on the air shaft and fix it;

[0026] Step 3: Start the slitting device to achieve the slitting operation of the film roll through the slitting saw blade;

[0027] Step 4: After step 3 is completed, the slitting of a film roll is completed, and then the material can be unloaded and packaged.

[0028] The advantages of the present invention are:

[0029] The invention discloses a slitting device for a protective film and a use method thereof.

[0030] The present invention can realize the slitting operation of the film roll by using the material placing device and the slitting device in coordination.

[0031] By setting up the saw blade protection structure and immersing the felt layer in water, the slitting saw blade can be cooled.

[0032] At the same time, the felt layer fits the slitting saw blade; the felt layer can act as a scraper block to scrape off the debris on the slitting saw blade, thereby better ensuring the flatness of the slitting position when slitting the film roll. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0034] Figure 1 It is a structural schematic diagram of the present invention.

[0035] Figure 2 It is a schematic diagram of the structure of the present invention after being loaded with a film roll.

[0036] Figure 3 It is a top view of the saw blade guard in the present invention.

[0037] Figure 4 It is a cross-sectional view of the connection between the saw blade guard and the saw blade protection structure in the present invention.

[0038] Figure 5 It is a schematic diagram of the optimized structure after the cleaning device is loaded in the present invention.

[0039] Figure 6 It is a schematic diagram of the structure when the saw blade guard is connected to the cleaning device in the present invention.

[0040] Figure 7 It is a schematic diagram of the system structure when the saw blade guard is connected to the cleaning device in the present invention.

[0041] Figure 8 It is a cross-sectional view of the three-way pipe in the present invention.

[0042] The marks in the above figure are:

[0043] 1. Collective, 2. Material placing device, 3. Film roll, 4. Slitting device. DETAILED DESCRIPTION

[0044] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0045] A slitting device for a protective film comprises a machine body 1, on which a material placement device 2 and a slitting device 4 are provided; the slitting device 4 comprises a slitting mechanism 4, and the slitting mechanism 4 comprises a saw blade guard 42, in which a slitting saw blade 41 is provided; the slitting saw blade 41 is connected to a slitting drive mechanism 43; the slitting drive mechanism 43 can control the rotation of the slitting saw blade 41; the slitting drive mechanism 43 is connected to the machine body 1 via an operating module 44; a saw blade protection structure 5 is provided in the saw blade guard 42; the present invention can realize the slitting operation of a film roll through the coordinated use of the material placement device 2 and the slitting device 4.

[0046] By setting the saw blade protection structure 5 and immersing the felt layer 52 in water, the slitting saw blade 41 can be cooled. At the same time, the felt layer 52 fits the slitting saw blade 41. The felt layer 52 can act as a scraper block to scrape off debris on the slitting saw blade 41, thereby better ensuring the flatness of the slitting area when slitting the film roll.

[0047] The protective film slitting device disclosed in the present invention is mainly used for slitting a wound film roll so as to divide the wound film roll into a plurality of independent small roll structures, which is convenient for subsequent use.

[0048] Specifically, the protective film slitting equipment disclosed in the present invention mainly includes a body 1, on which a material placement device 2 and a slitting device 4 are provided; in the present invention, the body 1 can continue to use the body structure of the existing slitting machine, and the innovation of the present invention is the independent innovation based on the structure of the existing slitting machine.

[0049] In addition, in the present invention, the material placement device 2 is mainly used for placing the film roll 3 to be slit, and the slitting device 4 is mainly used for slitting the film roll placed on the material placement device 2 .

[0050] In the present invention, the slitting device 4 includes a slitting mechanism 4, and the slitting mechanism 4 includes a saw blade guard 42, and a slitting saw blade 41 is arranged in the saw blade guard 42; the slitting saw blade 41 is connected to a slitting drive mechanism 43; the slitting drive mechanism 43 can control the rotation of the slitting saw blade 41; the slitting drive mechanism 43 is connected to the machine body 1 through an operating module 44; in the present invention, the slitting device 4 also includes a substrate table 45, which is mainly a flat plate structure, and a saw blade guard 42 is arranged on the substrate table 45. At the same time, the slitting drive mechanism is also arranged on the substrate table 45. When connected later, the substrate table 45 is connected to the workbench 11 on the machine body through the operating module; the slitting drive mechanism, the cleaning device below and.

[0051] The saw blade guard 42 plays a protective role and also serves as a longitudinal support. An opening is provided on the side of the saw blade guard 42, and part of the slitting saw blade 41 is located inside the saw blade guard 42; the exposed part is used for subsequent slitting operations; at the same time, a saw blade protection structure 5 is provided inside the saw blade guard 42 of the present invention; the saw blade protection structure 5 mainly acts on the slitting saw blade 41 to achieve cooling or impurity removal of the slitting saw blade 41 during subsequent use.

[0052] In addition, the operating module 44 here can be a three-dimensional linear module or a two-dimensional linear module, and the specific selection can be made according to actual working conditions.

[0053] In addition, the material placement device 2 described in the present invention includes an inflatable shaft 2 arranged on the machine body 1 for placing the film roll 3 to be cut; the inflatable shaft is an existing technology, and the inflatable shaft 2 plays a supporting and fixing role, and the film roll is fixed by squeezing and supporting the reel inside the film roll.

[0054] At the same time, in the present invention, the slitting device 4 includes a slitting mechanism 4, the slitting mechanism 4 includes a saw blade guard 42, a slitting saw blade 41 is arranged in the saw blade guard 42; the slitting saw blade 41 is connected to a slitting drive mechanism 43; the slitting drive mechanism 43 can control the rotation of the slitting saw blade 41; the slitting drive mechanism 43 is connected to the machine body 1 through an operating module 44; the saw blade guard 42 of the present invention plays a supporting and connecting role, and also facilitates the arrangement and placement of the subsequent saw blade protection structure 5 and the cleaning device 6.

[0055] In addition, in the present invention, the slitting drive mechanism 43 can be a driving motor, or it can be a motor with a belt and a pulley. The slitting saw blade 41 is connected to the saw blade guard 42 through a rotating shaft and a bearing mechanism. The rotating shaft can be fixedly connected to the slitting saw blade, or it can adopt other detachable connection methods. The specific selection can be made according to needs. The above-mentioned slitting mechanism 4 disclosed in the present invention is equivalent to the traditional cutting machine structure; at the same time, in the present invention, the slitting saw blade 41 is connected to the slitting drive mechanism 43 through a rotating shaft, and the slitting drive mechanism 43 drives the slitting saw blade 41 to rotate, thereby realizing subsequent cutting operations.

[0056] In the present invention, a saw blade protection structure 5 is provided in the saw blade guard 42; the saw blade protection structure 5 includes a connecting plate 51 arranged on the saw blade guard 42, and a felt layer 52 is provided on the connecting plate 51; the felt layer 52 passes through the saw blade guard 42 and presses against the slitting saw blade 41; in the present invention, the connecting plate 51 and the felt layer 52 can be fixedly connected or detachably connected, and the detachable connection method can be a Velcro, screw or snap connection; the purpose is to be able to achieve the connection between the felt layer 52 and the connecting plate 51; in addition, a hole is opened on the side of the saw blade guard 42, and the felt layer 52 extends through the hole to the inside of the saw blade guard 42 and contacts the slitting saw blade 41. The setting of the felt layer 52 has one function that immersion in water can realize the cooling of the slitting saw blade 41, and in addition, the felt layer 52 itself acts as a scraper, which is convenient for scraping off debris on the slitting saw blade 41.

[0057] Furthermore, in the present invention, the saw blade guard 42 includes two side plates, one end of which is connected by a connecting plate; the horizontal cross-section of the saw blade guard 42 is U-shaped; based on the above design, it is convenient to arrange the slitting saw blade 41 in the saw blade guard 42, and in the present invention, a saw blade protection structure 5 is respectively provided on the two side plates; the two saw blade protection structures 5 are distributed on the opposite sides of the slitting saw blade 41, so that when used subsequently, the two sides of the slitting saw blade 41 can be cooled and cleaned.

[0058] Furthermore, the slitting device in the present invention further comprises a cleaning device 6. In the present invention, the cleaning device is also arranged on the substrate table 45. Generally, one cleaning device is arranged on both sides of the saw blade guard.

[0059] In the present invention, the cleaning device 6 includes a mixing pipe 62, which is connected to an external discharge pipe 61; the opening of the external discharge pipe 61 faces the felt layer 52; the end of the mixing pipe 62 away from the external discharge pipe 61 is connected to a liquid supply structure 63 and an air supply structure 64; the liquid supply structure 63 is used to supply liquid into the mixing pipe 62; the air supply structure 64 is used to supply air into the mixing pipe 62; the present invention can realize the air or liquid supply operation of the felt layer 52 through the separate or combined use of the liquid supply structure 63 and the air supply structure 64, so as to facilitate the control of the wetness of the felt layer 52 during actual use.

[0060] Furthermore, the two have an obvious synergistic effect, and can better achieve the wet control of the felt layer 52.

[0061] The cleaning device 6 disclosed in the present invention mainly includes a mixing pipe 62, which mainly serves as a connection, facilitating the subsequent connection between the external exhaust pipe 61 and the liquid supply structure 63 and the air supply structure 64. In addition, in the present invention, the mixing pipe 62 can also serve as a connecting piece in subsequent use, facilitating installation on the saw blade guard 42.

[0062] In the present invention, the mixing duct is arranged through the saw blade guard.

[0063] During actual installation, the felt layer is arranged below the saw blade guard, and the mixing duct passes through the saw blade guard and extends to the inside of the saw blade guard and is located above the felt layer.

[0064] When in use, the cleaning device can move along with the substrate stage 45 and the saw blade guard to avoid subsequent operational interference between components.

[0065] In the present invention, the mixing pipe 62 is connected to the external discharge pipe 61 ; the provision of the external discharge pipe 61 facilitates the injection or spraying of water or gas onto the felt layer 52 , thereby achieving humidity control of the felt layer 52 .

[0066] In the present invention, the mixing pipe 62 is connected to a liquid supply structure 63 and an air supply structure 64 at one end away from the external discharge pipe 61; as the name implies, the air supply mainly supplies air to the mixing pipe 62, while the liquid supply structure 63 mainly supplies liquid into the mixing pipe 62.

[0067] Specifically, in the present invention, the air supply structure 64 can also be equipped with an external air filter 4; the air filter 4 is connected to the mixing pipe 62 through an air pump 641; the setting of the air filter 4 can ensure the cleanliness of the air supply of the air supply structure 64 and reduce the damage of impurities or debris to the felt layer 52.

[0068] In addition, in the present invention, the liquid supply structure 63 includes a water tank 634; the water tank 634 is connected to the mixing pipe 62 through a liquid spray pump 632; the air pump 641 is connected to the mixing pipe 62 through an air outlet pipe 642, and the liquid spray pump 632 is connected to the mixing pipe 62 through a water outlet pipe 631; the liquid spray pump 632 is connected to the water tank 634 through a water inlet pipe 633.

[0069] The liquid spray pump 632 and the air pump 641 are both a power unit, which facilitates the liquid supply and air supply operations during use.

[0070] In the present invention, the air pump 641 is connected to the mixing pipe 62 through the air outlet pipe 642, and the spray pump 632 is connected to the mixing pipe 62 through the water outlet pipe 631; the setting of the air outlet pipe 642 and the water outlet pipe 631 facilitates the connection between the air pump 641 and the spray pump 632 and the external exhaust pipe 61.

[0071] Furthermore, in the present invention, the air outlet pipe 642, the water outlet pipe 631 and the mixing pipe 62 are connected by a three-way pipe 65; a one-way valve is provided at the connecting end of the three-way pipe 65 and the air outlet pipe 642 and / or the water outlet pipe 631; the setting of the three-way pipe 65 facilitates the connection between the air outlet pipe 642, the water outlet pipe and the mixing pipe 62; at the same time, the three-way pipe 65 can also play a mixing role, facilitating the pre-mixing of gas and liquid; thereby realizing the mixing and cleaning of the felt layer 52 by the gas-liquid mixture.

[0072] Furthermore, in the present invention, a one-way valve is provided at the connecting end between the three-way pipe 65 and the air outlet pipe 642 and / or the water outlet pipe; the setting of the one-way valve can better control the direction of gas and liquid, prevent gas from entering the water outlet pipe, and prevent liquid from entering the air outlet pipe 642.

[0073] In addition, in the present invention, the three-way pipe 65 includes a pipe body 651, and the pipe body 651 is provided with a first outlet 652, a second outlet 653, and a third outlet 654. The first outlet 652 is connected to the air outlet pipe 642; the second outlet 653 is connected to the water outlet pipe; the third outlet 654 is connected to the mixing pipe 62; in the present invention, the first outlet 652 is required to be a frustum-shaped hole; the second outlet 653 is an inclined hole, and the inclination direction is toward the third outlet 654; in addition, in the present invention, the first outlet 652 and the air outlet pipe 642, the second outlet 653 and the water outlet pipe, and the third outlet 654 and the mixing pipe 62 are connected by threaded sections; this design method facilitates the connection between the three-way pipe 65 and adjacent pipe fittings.

[0074] Furthermore, in the present invention, the external discharge pipe 61 includes a nozzle body, and the nozzle body is provided with external discharge holes; the external discharge holes face the felt layer 52 .

[0075] In addition, the present invention requires that the three-way pipe 65 includes a pipe body 651, and the pipe body 651 is provided with a first outlet 652, a second outlet 653 and a third outlet 654, the first outlet 652 is connected to the air outlet pipe 642; the second outlet 653 is connected to the water outlet pipe; the third outlet 654 is connected to the mixing pipe 62; the first outlet 652 is a frustum-shaped hole; the second outlet 653 is an inclined hole, and the inclined direction is toward the third outlet 654; based on such a setting, the first outlet 652 of the frustum-shaped hole, the larger opening end is connected to the air outlet pipe 642, such a setting can increase the gas flow rate, and the setting of the second outlet 653 facilitates the water to enter the third outlet 654 and the discharge of the water; based on the coordinated use of the above structure, the water can enter the third outlet 654 and be discharged faster under the push of the gas.

[0076] Furthermore, the slitting equipment in the present invention also includes a film tube positioning device, and the film tube positioning device includes a push sleeve 22, and the inner diameter of the push sleeve 22 is larger than the inflatable shaft 2; the push sleeve 22 is coaxially arranged with the inflatable shaft 2; the push sleeve 22 is sleeved on the inflatable shaft 2; in the present invention, the push sleeve 22 plays a good end limiting role, which can ensure the accuracy and stability of the axial placement of the film roll on the inflatable shaft 2.

[0077] At the same time, based on the above design, the position of one end of the film roll can be limited, and the other end can be manually squeezed so that the film roll is close to the pushing sleeve 22. This setting can avoid the air shaft 2 from forming a pre-position before tensioning the film roll, thereby avoiding axial movement of the film roll during actual use, which may cause the first section of the material to be too narrow or too wide during the first cutting.

[0078] At the same time, the push sleeve 22 described in the present invention is connected with an adjustment mechanism; in the present invention, the adjustment mechanism plays a good connecting and adjusting role, which is convenient for subsequent use, and the position of the push sleeve 22 on the inflatable shaft 2 can be adjusted as needed; the scope of application of the present invention is improved; and the end limit of film rolls of different lengths is realized.

[0079] Specifically, the adjusting mechanism may be an adjusting cylinder, which may be a pneumatic cylinder or an electric cylinder. The position of the pushing sleeve 22 is changed based on the expansion and contraction of the adjusting cylinder itself.

[0080] In addition, in the present invention, the pushing sleeve 22 includes a sleeve body, and the adjusting mechanism may include an external thread set on the inflatable shaft 2 and an internal thread set in the sleeve body. The pushing sleeve 22 can be screwed on the inflatable shaft 2. During subsequent use, the pushing sleeve 22 is rotated to change its position on the inflatable shaft 2.

[0081] A method for using a protective film slitting device, the method comprising the following steps:

[0082] Step 1: Determine the film roll 3 to be slit;

[0083] Step 2: Place the film roll 3 to be slit on the air shaft 2 and fix it;

[0084] Step 3: Start the slitting device 4 to implement the slitting operation of the film roll through the slitting saw blade 41;

[0085] Step 4: After step 3 is completed, the slitting of a film roll is completed, and then the material can be unloaded and packaged.

[0086] The present invention can realize the slitting operation of the film roll through the above operation.

[0087] The specific working principle of the present invention is as follows: the protective film roll is sleeved on the inflatable shaft 2, and then the inflatable shaft 2 is pneumatically controlled to fix the film roll, and then the slitting device 4 is controlled; and then the slitting saw blade 41 is controlled to slitting the film roll on the inflatable shaft 2, and during the slitting process of the slitting saw blade 41, the operating module 44 will move along the axial and radial directions of the inflatable shaft 2, so that the slitting saw blade 41 can slitting the film roll on the inflatable shaft 2; when a film roll is cut, the cut material on the inflatable shaft 2 is removed, and the next uncut film roll is assembled.

[0088] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A slitting device for a protective film, characterized in that: It comprises a machine body, on which a material placing device and a cutting device are provided; The material placement device includes an inflatable shaft arranged on the machine body for placing the film roll to be slit; The slitting device comprises a slitting mechanism, the slitting mechanism comprises a saw blade guard, a slitting saw blade is arranged in the saw blade guard; the slitting saw blade is connected to a slitting drive mechanism; the slitting drive mechanism can control the rotation of the slitting saw blade; the slitting drive mechanism is connected to the machine body through an operating module; A saw blade protection structure is provided in the saw blade guard; The saw blade protection structure comprises a connecting plate arranged on the saw blade guard, and a felt layer is arranged on the connecting plate; the felt layer passes through the saw blade guard and presses against the slitting saw blade.

2. A protective film slitting device according to claim 1, characterized in that: The saw blade guard comprises two side plates, one end of which is connected by a connecting plate; the horizontal cross section of the saw blade guard is U-shaped; and a saw blade protection structure is respectively provided on the two side plates.

3. The protective film slitting device according to claim 1, characterized in that: The slitting equipment also includes a cleaning device, which includes a mixing pipe, which is connected to an external pipe; the opening of the external pipe faces the felt layer; the mixing pipe is connected to a liquid supply structure and an air supply structure at one end away from the external pipe; the liquid supply structure is used to supply liquid into the mixing pipe; the air supply structure is used to supply air into the mixing pipe.

4. The protective film slitting device according to claim 3, characterized in that: The air supply structure includes an air pump connected to the mixing pipe; the liquid supply structure includes a water tank; the water tank is connected to the mixing pipe through a liquid spray pump; the air pump is connected to the mixing pipe through an air outlet pipe, and the liquid spray pump is connected to the mixing pipe through a water outlet pipe; the liquid spray pump is connected to the water tank through a water inlet pipe.

5. The protective film slitting device according to claim 4, characterized in that: The air outlet pipe, the water outlet pipe and the mixing pipe are connected through a three-way pipe.

6. The protective film slitting device according to claim 5, characterized in that: A one-way valve is provided at the connection end of the three-way pipe and the air outlet pipe and / or the water outlet pipe.

7. The protective film slitting device according to claim 5, characterized in that: The three-way pipe includes a pipe body, on which a first outlet, a second outlet and a third outlet are provided. The first outlet is connected to an air outlet pipe; the second outlet is connected to a water outlet pipe; the third outlet is connected to a mixing pipe; the first outlet is a frustum-shaped hole; the second outlet is an inclined hole, and the inclination direction is toward the third outlet.

8. The protective film slitting device according to claim 1, characterized in that: The slitting equipment also includes a film cylinder positioning device, which includes a push sleeve, the inner diameter of which is larger than the inflatable shaft; the push sleeve is coaxially arranged with the inflatable shaft; and the push sleeve is sleeved on the inflatable shaft.

9. The protective film slitting device according to claim 8, characterized in that: The pushing sleeve is connected with an adjusting mechanism.

10. A method for using the protective film slitting device according to any one of claims 1 to 9, characterized in that: The method of use comprises the following steps: Step 1: Determine the film roll to be slit; Step 2: Place the film roll to be slit on the air shaft and fix it; Step 3: Start the slitting device to achieve the slitting operation of the film roll through the slitting saw blade; Step 4: After step 3 is completed, the slitting of a film roll is completed, and then the material can be unloaded and packaged.

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