A kind of anti-curl cutting mechanism of car protection film slitting machine

Abstract

The utility model relates to a kind of anti-curling cutting mechanism of automobile protective film slitting machine, belong to automobile protective film processing equipment technical field, including mounting bracket, electric telescopic link and cutting assembly, the outside of cutting assembly is provided with anti-curling structure;The cutting assembly includes first gantry, the mounting shaft fixed in the first gantry interior, the positioning seat detachably mounted on the outer surface of the mounting shaft, the sleeve fixed in the bottom side of the positioning seat, the telescopic link setting in the sleeve interior, the cutter and the first return spring fixed in the upper and lower ends of the telescopic link.The anti-curling cutting mechanism of automobile protective film slitting machine, protective film is pressed by compression roller before cutting first, effectively prevent protective film from curling in cutting process due to stress. Simultaneously through the setting of second return spring, the process of cutting instant, tension release is realized, the biggest inducement leading to curling is eliminated, cutting tension is reduced, reach the advantages that curling-preventing effect is good.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive protective film processing equipment, specifically to an anti-rolling cutting mechanism for an automotive protective film slitting machine. Background Technology

[0002] In the automotive manufacturing and aftermarket window tinting industries, automotive protective films such as paint protection films and color-changing films are increasingly widely used. These protective films are usually shipped in wide rolls and need to be cut into narrow rolls of specific widths using a multi-channel slitting machine according to the contours of different parts of the vehicle. The cutting quality of the slitting machine directly determines the effectiveness of the protective film.

[0003] Patent document CN222270562U discloses a multi-channel slitting machine for protective films. This application uses a clamping assembly to clamp and fix four sets of cutting blades above the protective film, enabling the cutting blades to perform multi-group slitting of the protective film, thereby accelerating the slitting speed and improving the processing efficiency of the protective film. By adjusting the structure to drive the cutting blades to move, the spacing between the four sets of cutting blades can be adjusted, allowing the protective film to be slit into specified widths to meet the practical needs of users.

[0004] However, the clamping rollers in this application use a fixed gap or rigid clamping method. Due to the variety of protective film materials such as PVC, TPU, and PET, the thickness and surface viscosity vary greatly. The rigid clamping rollers cannot adapt to these changes. During the slitting process, the moment the cutting blade presses down, it will generate a huge local stress on the protective film. Since the existing clamping rollers are rigid or constant pressure, they cannot provide effective tension release at the moment of cutting. This causes the soft film edge to curl upward or downward under the stress concentration, which seriously affects the flatness and aesthetics of the application. Therefore, an anti-curling cutting mechanism for automotive protective film slitting machine is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an anti-rolling cutting mechanism for an automotive protective film slitting machine, which has advantages such as good anti-rolling effect and solves the problems mentioned in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An anti-rolling cutting mechanism for an automotive protective film slitting machine includes a mounting frame, an electric telescopic rod, and a cutting assembly, wherein the cutting assembly is provided with an anti-rolling structure on its exterior.

[0008] The cutting assembly includes a first gantry frame, a mounting shaft fixed inside the first gantry frame, a positioning seat detachably mounted on the outer surface of the mounting shaft, a sleeve fixed to the bottom side of the positioning seat, a telescopic rod disposed inside the sleeve, a cutter fixed to the upper and lower ends of the telescopic rod, and a first return spring.

[0009] The anti-rolling structure includes a second gantry frame and a pressure roller rotatably mounted inside the second gantry frame. A drive shaft is fixed to the end of the pressure roller. A connecting seat is rotatably provided between the drive shaft and the first gantry frame. A second return spring is fixed between the two connecting seats. A connecting arm is hinged between the second gantry frame and the first gantry frame. An air supply structure that is linked and cooperates with the drive shaft is provided on the outer wall of the second gantry frame. A nozzle that communicates with the air supply structure is fixed on the outer wall of the second gantry frame.

[0010] Furthermore, the electric telescopic rod is bolted to the top side of the mounting frame, and the output end of the electric telescopic rod passes through the interior of the mounting frame, and the output end of the electric telescopic rod is fixed to the top side of the first gantry frame.

[0011] Furthermore, the top of the first gantry is fixed with two guide rods that penetrate the interior of the mounting frame.

[0012] Furthermore, both the positioning seat and the mounting shaft have adjustment holes inside, and fastening bolts are installed inside the adjustment holes on the positioning seat. The number of cutting components is multiple.

[0013] Furthermore, the telescopic rod is telescopically connected to the sleeve, the bottom side of the first return spring is fixed to the top end of the telescopic rod, and the top side of the first return spring is fixed to the inner top wall of the sleeve.

[0014] Furthermore, the number of connecting seats is four, the number of second return springs is two, the four connecting seats and the two second return springs are symmetrically located at the left and right ends of the pressure roller, and the connecting arm is located in the middle of the first gantry and the second gantry.

[0015] Furthermore, the gas delivery structure includes a pressure cylinder fixed to the side wall of the second gantry. A piston extending outward is provided inside the pressure cylinder. An abutment block is installed at the bottom end of the piston. A cam that abuts against the abutment block is fixed at the end of the drive shaft. A third return spring is installed between the abutment block and the pressure cylinder. Two valve pipes are installed on the outer wall of the pressure cylinder. The ends of the two valve pipes are respectively connected to the nozzle and the ion generator.

[0016] Compared with the prior art, this utility model provides an anti-curling cutting mechanism for an automotive protective film slitting machine, which has the following beneficial effects:

[0017] 1. The anti-curling cutting mechanism of this automotive protective film slitting machine uses pressure rollers to press down on the protective film before cutting, effectively preventing the protective film from curling due to force during the cutting process. Simultaneously, the second reset spring ensures tension release at the moment of cutting, eliminating the biggest cause of curling, reducing cutting tension, and achieving excellent anti-curling effect.

[0018] 2. The anti-rolling cutting mechanism of the car protective film slitting machine uses an air supply structure to spray the ion wind generated by the ion generator through the nozzle to eliminate static electricity at the cutting part of the protective film, further avoiding the rolling problem caused by static electricity and ensuring the quality of the protective film after cutting. Attached Figure Description

[0019] Figure 1 This is a perspective view of the entire utility model;

[0020] Figure 2 This is a cross-sectional view of the cutting component of this utility model;

[0021] Figure 3 This is a cross-sectional view of the gas transmission structure of this utility model;

[0022] Figure 4 This utility model Figure 3 A magnified structural diagram of structure A is shown.

[0023] In the diagram: 1. Mounting frame; 11. Guide rod; 2. Electric telescopic rod; 3. Cutting assembly; 31. First gantry frame; 32. Mounting shaft; 33. Positioning seat; 34. Sleeve; 35. Telescopic rod; 36. Cutter; 37. First return spring; 38. Adjustment hole; 4. Anti-rolling structure; 41. Second gantry frame; 42. Pressure roller; 43. Drive shaft; 44. Connecting seat; 45. Second return spring; 5. Connecting arm; 6. Air supply structure; 61. Pressure cylinder; 62. Piston; 63. Abutment block; 64. Third return spring; 65. Cam; 66. Valve pipe; 7. Nozzle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 4This embodiment of an anti-rolling cutting mechanism for an automotive protective film slitting machine includes a mounting frame 1, an electric telescopic rod 2, and a cutting assembly 3. The cutting assembly 3 includes a first gantry frame 31, a mounting shaft 32 fixed inside the first gantry frame 31, a positioning seat 33 detachably mounted on the outer surface of the mounting shaft 32, a sleeve 34 fixed to the bottom side of the positioning seat 33, a telescopic rod 35 disposed inside the sleeve 34, cutters 36 fixed to the upper and lower ends of the telescopic rod 35, and a first return spring 37. Specifically, the electric telescopic rod 2 is bolted to the top side of the mounting frame 1, and the output end of the electric telescopic rod 2 penetrates the interior of the mounting frame 1. The output end of the electric telescopic rod 2 is connected to the first return spring 37. The top side of the gantry frame 31 is fixed; the top of the first gantry frame 31 is fixed with two guide rods 11 that penetrate the interior of the mounting frame 1. When the electric telescopic rod 2 drives the first gantry frame 31 to move up and down, the guide rods 11 play a guiding and limiting role, which can prevent the first gantry frame 31 from deviating or tilting during the movement, ensuring that the first gantry frame 31 always moves in a straight line along the vertical direction, further improving the accuracy and stability of cutting; at the same time, the design of two guide rods 11 increases the redundancy of guidance. Even if one guide rod 11 has a slight failure, the other guide rod 11 can still play a certain guiding role, improving the reliability of the equipment.

[0026] To improve the flexibility of the cutter 36, both the positioning seat 33 and the mounting shaft 32 in this embodiment are provided with adjustment holes 38, and fastening bolts are installed inside the adjustment holes 38 on the positioning seat 33. There are multiple cutting components 3.

[0027] To improve the cutting effect, the cutting assembly 3 is equipped with an anti-curling structure 4. The anti-curling structure 4 includes a second gantry 41 and a pressure roller 42 rotatably mounted inside the second gantry 41. The pressure roller 42, rotatably mounted inside the second gantry 41, can press on the car protective film during the cutting process. Through its own rotation, it can apply pressure evenly to the surface of the protective film, effectively preventing the edge of the protective film from curling, while avoiding excessive compression of the protective film and affecting its quality. The end of the pressure roller 42 is fixed with a drive shaft 43. A connecting seat 44 is rotatably provided between the drive shaft 43 and the first gantry 31. A second return spring 45 is fixed between the two connecting seats 44. A connecting arm 5 is hinged between the second gantry 41 and the first gantry 31, so that the second gantry 41 can move synchronously with the up and down movement of the first gantry 31, ensuring the coordination of the movement of the anti-curling structure 4 and the cutting assembly 3, and always effectively preventing the protective film from curling during the cutting process.

[0028] Specifically, the outer wall of the second gantry 41 is provided with an air supply structure 6 that is linked and cooperates with the drive shaft 43, and a nozzle 7 that communicates with the air supply structure 6 is fixed on the outer wall of the second gantry 41; specifically, the telescopic rod 35 is telescopically connected to the sleeve 34, the bottom side of the first return spring 37 is fixed to the top of the telescopic rod 35, and the top side of the first return spring 37 is fixed to the inner top wall of the sleeve 34. The elastic cutting system formed by the first return spring 37 avoids the rigid impact of the cutter 36, which protects the blade and reduces the impact damage to the film surface, making the cut edge smoother and neater.

[0029] It should be noted that there are four connecting seats 44 and two second return springs 45. The four connecting seats 44 and the two second return springs 45 are symmetrically located at the left and right ends of the pressure roller 42, respectively. The connecting arm 5 is located in the middle of the first gantry 31 and the second gantry 41. The pressure roller 42 is lower than the cutter 36. There are two anti-rolling structures 4, and the two anti-rolling structures 4 are symmetrically distributed on the left and right sides of the cutting assembly 3.

[0030] To further improve the cutting effect, the gas supply structure 6 includes a pressure cylinder 61 fixed to the side wall of the second gantry 41. Inside the pressure cylinder 61, a piston 62 extends outwards. A stop block 63 is installed at the bottom end of the piston 62. A cam 65, abutting against the stop block 63, is fixed to the end of the drive shaft 43. A third return spring 64 is installed between the stop block 63 and the pressure cylinder 61. Two valve pipes 66 are installed on the outer wall of the pressure cylinder 61. The ends of the two valve pipes 66 are connected to the nozzle 7 and the ion generator, respectively. It should be noted that the valve pipe 66 consists of a check valve and a gas supply pipe, which can be a flexible hose. The ion generator is a conventional technology known to the public in the prior art; therefore, its specific structural composition and working principle will not be described in detail here. The piston 62 is T-shaped. Through the precise cooperation between the cam 65 and the abutment block 63, the stroke and frequency of the piston 62 in the pressure cylinder 61 can be controlled, thereby precisely controlling the compression and release speed of the gas in the pressure cylinder 61. This allows the airflow ejected from the nozzle 7 to be precisely adjusted according to the actual needs of the cutting process, improving the accuracy of the anti-rolling effect.

[0031] It is worth mentioning that the air supply structure 6 converts the rotational motion of the pressure roller 42 into air blowing power, realizing the simultaneous cutting and static electricity elimination. This not only prevents edge curling but also prevents dust adsorption, greatly improving the cleanliness and quality of the film roll after slitting.

[0032] The working principle of the above embodiments is as follows:

[0033] The electric telescopic rod 2 is activated, driving the first gantry 31 and the entire cutting assembly 3 above it to move downwards. Through the hinged connecting arm 5, the downward pressing action of the first gantry 31 synchronously drives the second gantry 41 and its pressure roller 42 to move downwards together. During this stage, the pressure roller 42 always maintains a tight press on the protective film. The cutter 36 contacts the protective film and begins to cut. At this time, the protective film generates an upward reaction force on the cutter 36. This force compresses the first return spring 37, allowing the telescopic rod 35 to retract slightly relative to the sleeve 34. This elastic cutting design prevents... The rigid impact is eliminated, allowing the cutter 36 to cut into the film in a gentler way, reducing the initial stress. Just as the cutter 36 is about to completely cut through the protective film, the tension of the film surface on the pressure roller 42 will reach its peak. At this time, the second return spring 45 is stretched, allowing the second gantry 41 to produce a small upward displacement relative to the first gantry 31, so that the pressure force of the pressure roller 42 on the protective film is released instantaneously. The film body is in a brief low tension or relaxed state near the cutting point. The final cut is completed in this state, and the cut edge cannot curl due to the lack of huge tension.

[0034] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.

[0035] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-curling cutting mechanism for an automotive protective film slitting machine, characterized in that: It includes a mounting bracket (1), an electric telescopic rod (2), and a cutting assembly (3), wherein the cutting assembly (3) is provided with an anti-rolling structure (4) on its exterior; The cutting assembly (3) includes a first gantry frame (31), a mounting shaft (32) fixed inside the first gantry frame (31), a positioning seat (33) detachably mounted on the outer surface of the mounting shaft (32), a sleeve (34) fixed to the bottom side of the positioning seat (33), a telescopic rod (35) disposed inside the sleeve (34), a cutter (36) fixed to the upper and lower ends of the telescopic rod (35), and a first return spring (37). The anti-rolling structure (4) includes a second gantry (41) and a pressure roller (42) rotatably mounted on the inner side of the second gantry (41). The end of the pressure roller (42) is fixed with a drive shaft (43). A connecting seat (44) is rotatably provided between the drive shaft (43) and the first gantry (31). A second return spring (45) is fixed between the two connecting seats (44). A connecting arm (5) is hinged between the second gantry (41) and the first gantry (31). An air supply structure (6) that is linked and cooperates with the drive shaft (43) is provided on the outer wall of the second gantry (41). A nozzle (7) that communicates with the air supply structure (6) is fixed on the outer wall of the second gantry (41).

2. The anti-rolling cutting mechanism of an automotive protective film slitting machine according to claim 1, characterized in that: The electric telescopic rod (2) is bolted to the top side of the mounting frame (1), and the output end of the electric telescopic rod (2) passes through the interior of the mounting frame (1). The output end of the electric telescopic rod (2) is fixed to the top side of the first gantry frame (31).

3. The anti-rolling cutting mechanism of an automotive protective film slitting machine according to claim 1, characterized in that: The top of the first gantry (31) is fixed with a guide rod (11) that penetrates the interior of the mounting frame (1), and there are two guide rods (11).

4. The anti-rolling cutting mechanism of an automotive protective film slitting machine according to claim 1, characterized in that: The positioning seat (33) and the mounting shaft (32) are both provided with adjustment holes (38), and fastening bolts are installed inside the adjustment holes (38) on the positioning seat (33). There are multiple cutting components (3).

5. The anti-rolling cutting mechanism of an automotive protective film slitting machine according to claim 1, characterized in that: The telescopic rod (35) is telescopically connected to the sleeve (34), the bottom side of the first return spring (37) is fixed to the top of the telescopic rod (35), and the top side of the first return spring (37) is fixed to the inner top wall of the sleeve (34).

6. The anti-rolling cutting mechanism of an automotive protective film slitting machine according to claim 1, characterized in that: The number of connecting seats (44) is four, the number of second return springs (45) is two, the four connecting seats (44) and the two second return springs (45) are symmetrically located at the left and right ends of the pressure roller (42), and the connecting arm (5) is located in the middle of the first gantry (31) and the second gantry (41).

7. The anti-rolling cutting mechanism of an automotive protective film slitting machine according to claim 1, characterized in that: The gas delivery structure (6) includes a pressure cylinder (61) fixed to the side wall of the second gantry (41). The pressure cylinder (61) has a piston (62) extending outward. The bottom end of the piston (62) is fitted with an abutment block (63). The end of the drive shaft (43) is fixed with a cam (65) that abuts against the abutment block (63). A third return spring (64) is installed between the abutment block (63) and the pressure cylinder (61). Two valve pipes (66) are installed on the outer wall of the pressure cylinder (61). The ends of the two valve pipes (66) are respectively connected to the nozzle (7) and the ion generator.

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