Tension adjusting mechanism of film slitting machine

Abstract

The utility model discloses a kind of tension adjusting mechanism of film slitting machine, it is related to film slitting machine technical field, including rack and motor, three traction rollers and a winding roller are rotationally arranged on rack, the both sides edge of rack is fixedly provided with fixed plate, adjusting assembly is provided on fixed plate, adjusting roller is vertically movably arranged on fixed plate, adjusting roller and three traction rollers jointly constitute trapezoidal film conveying path, motor is connected with adjusting assembly, for driving adjusting assembly to drive adjusting roller vertically moves.The utility model forms trapezoidal film conveying path by setting the vertically movable adjusting roller and three traction rollers, in combination with the adjusting assembly driven by motor, dynamic adaptive adjustment to film tension is realized.

Description

Technical Field

[0001] This utility model relates to the field of film slitting machines, and in particular to a tension adjustment mechanism for a film slitting machine. Background Technology

[0002] Film slitting machines are indispensable key equipment in the packaging, printing, and composite materials industries. Their main function is to precisely cut wide rolls of film, paper, or foil into multiple narrow rolls according to the specifications required for subsequent processing. The stability and precision of this process directly determine the quality of the final finished rolls, such as the neatness of the roll shape, its tightness, and whether there are scratches or wrinkles on the surface. Maintaining constant tension of the film along the slitting and winding paths is the core technical aspect to ensure winding quality, because inappropriate tension will immediately cause the film roll to sag or be overstretched, thus becoming waste.

[0003] Traditional film slitting machines typically employ a fixed roller configuration for tension adjustment, where the relative positions of the traction roller and the adjusting roller remain constant during operation. While this design achieves basic tension control during initial commissioning, the load characteristics on the winding side change significantly as the film roll diameter increases during the continuous winding process. Lacking a dynamic adjustment mechanism, the fixed roller configuration cannot adapt to tension fluctuations caused by changes in roll diameter, necessitating frequent machine stops for adjustments and impacting production efficiency. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing film slitting machines in lacking a dynamic tension adjustment mechanism, and to propose a tension adjustment mechanism for film slitting machines.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution: A tension adjustment mechanism for a film slitting machine includes a frame and a motor. Three traction rollers and one take-up roller are rotatably mounted on the frame. Fixed plates are fixedly mounted on both sides of the frame. Adjustment components are mounted on the fixed plates. Adjustment rollers are vertically movable on the fixed plates. The adjustment rollers and the three traction rollers together form a trapezoidal film conveying path. The motor is connected to the adjustment components and is used to drive the adjustment components to move the adjustment rollers vertically.

[0006] Preferably, the adjustment assembly includes a movable groove formed on a fixed plate, a movable block is slidably disposed in the movable groove, the shaft at the end of the adjustment roller is rotatably connected to the movable block, and a control component is provided on the outside of the fixed plate, the control component being used to drive the movable block to move along the movable groove.

[0007] Preferably, the control component includes a fixed frame fixedly installed on the outside of the fixed plate, a lead screw rotatably provided on the inside of the fixed frame, a motor fixedly installed on the upper end of the fixed frame, the output end of the motor being connected to the end of the lead screw, and a connecting block fixedly provided on the middle of the outer side of the moving block, the connecting block being threadedly connected to the lead screw.

[0008] Preferably, a limiting frame is fixedly provided on the outer wall of the frame, a limiting block is slidably provided on the inner side of the limiting frame, a round rod is fixedly provided in the middle of the limiting block, a rotating wheel is rotatably provided at the end of the round rod, the rotating wheel is parallel to the take-up roller, a laser rangefinder is fixedly provided on the outer wall of the frame, the output end of the laser rangefinder is directly facing the limiting block, and a limiting element is provided between the limiting block and the limiting frame.

[0009] Preferably, the limiting member includes a limiting rod fixedly installed on the side of the limiting block, the end of the limiting rod passing through the limiting frame, and a spring sleeved on the limiting rod, the spring being located between the inner side of the limiting frame and the limiting block.

[0010] Compared with the prior art, the beneficial effects of this utility model are: In this invention, a trapezoidal film conveying path is formed by a vertically movable adjusting roller and three traction rollers. Combined with a motor-driven adjusting assembly, dynamic adaptive adjustment of film tension is achieved. Compared to the traditional fixed roller group layout, this structure can actively respond to changes in load characteristics caused by changes in roll diameter during winding. By adjusting the position of the adjusting roller in real time, it maintains stable tension and effectively solves the problem of downtime for adjustment caused by tension fluctuations in high-speed production modes. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the trapezoidal film conveying path structure of this utility model; Figure 3 This is a schematic diagram of the adjustment component structure of this utility model; Figure 4 This is a schematic diagram of the structure for measuring the change in roll diameter according to this utility model.

[0012] The numbers in the diagram are as follows: 1. Frame; 11. Traction roller; 12. Take-up roller; 13. Fixed plate; 14. Adjusting roller; 15. Motor; 2. Adjusting assembly; 21. Moving groove; 22. Moving block; 3. Fixed frame; 31. Lead screw; 32. Connecting block; 4. Limiting frame; 41. Limiting block; 42. Round rod; 43. Rotary wheel; 44. Laser rangefinder; 5. Limiting rod; 51. Spring. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] In the description of this specification, the references to terms such as "embodiment," "one embodiment," "some implementations," "exemplary," and "one implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0016] Example: This example provides a tension adjustment mechanism for a film slitting machine. See [link to example]. Figure 1-4 Specifically, it includes a frame 1 and a motor 15. Three traction rollers 11 and one take-up roller 12 are rotatably mounted on the frame 1. Fixed plates 13 are fixedly mounted on both sides of the frame 1. Adjustment components 2 are mounted on the fixed plates 13. Adjustment rollers 14 are vertically movable on the fixed plates 13. The adjustment rollers 14 and the three traction rollers 11 together form a trapezoidal film conveying path. The motor 15 is connected to the adjustment components 2 and is used to drive the adjustment components 2 to move the adjustment rollers 14 vertically.

[0017] In this embodiment, the film's path has a specific geometric layout before entering the take-up roller 12. The positions of the three traction rollers 11 are fixed, forming a stable basic framework. Two traction rollers 11 are arranged in parallel, with the foremost traction roller 1 parallel to the adjusting roller 14. The vertically movable adjusting roller 14, as the fourth vertex, together with the three fixed rollers, forms the four corner points of a trapezoid. The film meanders around these four rollers, thus naturally forming a trapezoidal transport path.

[0018] In the specific implementation process, such as Figure 1 and Figure 3 As shown, the adjustment assembly 2 includes a movable groove 21 opened on the fixed plate 13, a movable block 22 is slidably arranged in the movable groove 21, the shaft at the end of the adjustment roller 14 is rotatably connected to the movable block 22, and a control component is provided on the outside of the fixed plate 13. The control component is used to drive the movable block 22 to move along the movable groove 21.

[0019] In this embodiment, the core function of the moving groove 21 is guidance and limiting. It precisely defines a vertical movement trajectory, ensuring that the moving block 22 (along with the adjusting roller 14) can only slide up and down along the predetermined straight path without deviation or rotation, thus guaranteeing the stability and accuracy of the adjustment. The moving block 22 functions as a connection and transmitter. On one hand, it acts as a bearing seat, supporting the shaft end of the adjusting roller 14 so that it can rotate freely; on the other hand, it acts as the driven object, directly transmitting the linear motion of external power (from the control components in subsequent sections) to the adjusting roller 14.

[0020] In the specific implementation process, such as Figure 1 and Figure 3 As shown, the control components include a fixed frame 3 fixedly installed on the outside of the fixed plate 13, a lead screw 31 rotatably installed on the inside of the fixed frame 3, a motor 15 fixedly installed on the upper end of the fixed frame 3, the output end of the motor 15 being connected to the end of the lead screw 31, and a connecting block 32 fixedly installed in the middle of the outer side of the moving block 22, the connecting block 32 being threadedly connected to the lead screw 31.

[0021] In this embodiment, the fixing frame 3 serves as a mounting and support. It provides a robust and stable mounting base for the lead screw 31 and the motor 15. The lead screw 31 is the core component for motion conversion. Its function is to accurately convert the rotational motion output by the motor 15 into linear motion. The motor 15, as a power source, provides the rotational power and torque. The connecting block 32 serves as a connection and transmission component. It is fixed to the moving block 22 and has internal threads that mate with the lead screw 31. When the lead screw 31 rotates, the connecting block 32 is restricted from rotation (by the moving groove 21) and can only move along the axial direction of the lead screw 31, thereby pushing the moving block 22 to move vertically.

[0022] In the specific implementation process, such as Figure 1 and Figure 4 As shown, a limiting frame 4 is fixedly provided on the outer wall of the frame 1, a limiting block 41 is slidably provided on the inner side of the limiting frame 4, a round rod 42 is fixedly provided in the middle of the limiting block 41, a rotating wheel 43 is rotatably provided at the end of the round rod 42, the rotating wheel 43 is parallel to the take-up roller 12, a laser rangefinder 44 is fixedly provided on the outer wall of the frame 1, the output end of the laser rangefinder 44 is directly facing the limiting block 41, and a limiting component is provided between the limiting block 41 and the limiting frame 4.

[0023] In this embodiment, the limiting frame 4 serves as the mounting base, providing support and mounting position for the entire detection mechanism. The limiting block 41 is the sensor's detection target and the carrier of displacement. Its position directly reflects the roll diameter. The round rod 42 rigidly transmits the displacement of the rotating wheel 43 to the limiting block 41. The rotating wheel 43 is used for contact measurement. It is designed to rotate freely to reduce friction with the film roll surface. It always stays in close contact with the film roll, and when the film roll diameter increases, it pushes it outward. The laser rangefinder 44 is a high-precision non-contact displacement sensor. It continuously measures the distance between itself and the surface of the limiting block 41 and converts this distance signal into an electrical signal in real time, transmitting it to the control system.

[0024] In the specific implementation process, such as Figure 1 and Figure 4 As shown, the limiting component includes a limiting rod 5 fixedly installed on the side of the limiting block 41. The end of the limiting rod 5 passes through the limiting frame 4, and a spring 51 is sleeved on the limiting rod 5. The spring 51 is located between the inner side of the limiting frame 4 and the limiting block 41.

[0025] In this embodiment, the core function of the limiting rod 5 is guidance. It passes through the limiting frame 4, ensuring that the limiting block 41 can only slide in a straight line, preventing uncontrollable offset or rotation, thus guaranteeing measurement accuracy. The spring 51 is an elastic element used to provide clamping force. It is pre-compressed between the limiting frame 4 and the limiting block 41, generating a continuous inward thrust. This force is ultimately transmitted to the rotating wheel 43 through the limiting block 41 and the round rod 42, ensuring it remains firmly pressed against the film roll surface.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A tension adjustment mechanism for a film slitting machine, comprising a frame (1) and a motor (15), characterized in that: The frame (1) is rotatably equipped with three traction rollers (11) and one take-up roller (12). Fixed plates (13) are fixedly installed on both sides of the frame (1). Adjustment components (2) are installed on the fixed plates (13). Adjustment rollers (14) are vertically movable on the fixed plates (13). The adjustment rollers (14) and the three traction rollers (11) together form a trapezoidal film conveying path. The motor (15) is connected to the adjustment components (2) and is used to drive the adjustment components (2) to drive the adjustment rollers (14) to move vertically. A limiting frame (4) is fixedly provided on the outer wall of the frame (1). A limiting block (41) is slidably provided on the inner side of the limiting frame (4). A round rod (42) is fixedly provided in the middle of the limiting block (41). A rotating wheel (43) is provided at the end of the round rod (42). The rotating wheel (43) is parallel to the take-up roller (12). A laser rangefinder (44) is fixedly provided on the outer wall of the frame (1). The output end of the laser rangefinder (44) is directly facing the limiting block (41). A limiting component is provided between the limiting block (41) and the limiting frame (4).

2. The tension adjustment mechanism of a film slitting machine according to claim 1, characterized in that: The adjustment assembly (2) includes a moving groove (21) opened on the fixed plate (13), a moving block (22) is slidably provided in the moving groove (21), the shaft at the end of the adjustment roller (14) is rotatably connected to the moving block (22), and a control component is provided on the outside of the fixed plate (13), the control component is used to drive the moving block (22) to move along the moving groove (21).

3. The tension adjustment mechanism of a film slitting machine according to claim 2, characterized in that: The control component includes a fixed frame (3) fixedly installed on the outside of the fixed plate (13), a lead screw (31) rotatably provided on the inside of the fixed frame (3), a motor (15) fixedly installed on the upper end of the fixed frame (3), the output end of the motor (15) being connected to the end of the lead screw (31), and a connecting block (32) fixedly provided on the middle of the outside of the moving block (22), the connecting block (32) being threadedly connected to the lead screw (31).

4. The tension adjustment mechanism of a film slitting machine according to claim 1, characterized in that: The limiting component includes a limiting rod (5) fixedly installed on the side of the limiting block (41). The end of the limiting rod (5) passes through the limiting frame (4). A spring (51) is sleeved on the limiting rod (5). The spring (51) is located between the inner side of the limiting frame (4) and the limiting block (41).

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