Edge trimming device for composite roll film

Abstract

This utility model belongs to the field of composite film technology, specifically relating to a trimming device for composite film, including a support frame and a transfer roller for transporting the composite film. The transfer roller is rotatably connected between the left and right sides of the inner wall of the support frame. A crossbeam is installed between the left and right sides of the inner wall of the support frame. A guide rail is provided on the front side of the crossbeam, and two sliders are slidably connected to the outer side of the guide rail. Trimming units are provided on the front side of each slider. This trimming device for composite film can drive gears and toothed belts by starting a motor, thereby making the two sliders move synchronously in opposite or opposite directions along the guide rail. The two sliders always remain symmetrical with the center of the crossbeam, greatly simplifying the operation steps. At the same time, the scale groove on the crossbeam helps the operator to intuitively observe the position of the sliders and quickly complete the trimming positioning, effectively solving the problems of cumbersome adjustment and difficulty in controlling accuracy of traditional devices, and adapting to the trimming needs of composite films of different widths.

Description

Technical Field

[0001] This utility model relates to the field of composite film technology, specifically to a trimming device for composite film. Background Technology

[0002] In numerous fields such as food packaging, pharmaceutical packaging, and daily chemical product packaging, composite roll film has become one of the most widely used packaging materials due to its excellent barrier properties, temperature resistance, flexibility, and printability. During the production and processing of composite roll film, in order to ensure the precision and product quality of subsequent bag making, sealing, and other processes, the excess material on both sides needs to be trimmed. This process relies on specialized trimming equipment. Currently, the mainstream configuration of trimming devices used in the industry for composite roll film consists of two independent cutting units. The two cutting units correspond to the two sides of the composite roll film respectively. Through the cooperation of the cutting blade and the transmission mechanism, the simultaneous cutting operation of the edge material on both sides of the roll film is completed. However, in actual production applications, this independently configured trimming device presents significant operational inconveniences and precision control challenges. Specifically, when adjusting the trimming position according to changes in the width of the composite film roll, operators must adjust two separate cutting units individually: first, the fixing components of one cutting unit must be loosened, and the cutting blade must be moved to the target position using its independent position adjustment mechanism. During the adjustment process, the blade position must be repeatedly calibrated using a ruler or measuring instrument to ensure cutting accuracy. After calibration, the cutting unit is then re-fixed. Subsequently, the same operating procedure is followed to adjust and calibrate the position of the other cutting unit. The entire adjustment process is not only cumbersome and time-consuming, but also impacts production efficiency. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a trimming device for composite film rolls, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a trimming device for composite roll film, comprising a support frame and a transfer roller for transporting composite roll film; The transmission roller is rotatably connected between the left and right sides of the inner wall of the support frame. A crossbeam is installed between the left and right sides of the inner wall of the support frame. A guide rail is provided on the front side of the crossbeam, and two sliders are slidably connected to the outer side of the guide rail. Both sliders are provided with trimming units on their front sides, and the support frame is provided with a drive structure for driving the two sliders and trimming units to move in opposite or opposite directions. The drive structure includes mounting seats installed on the left and right sides of the inner wall of the support frame, and gears are rotatably connected to both mounting seats via a rotating shaft. The outer sides of the two gears are meshed with the same toothed belt. A motor with its output end connected to the rotating shaft is provided at the bottom of one of the mounting seats. Both sliders are equipped with transmission plates, which are connected to the front and rear sides of the toothed belt, respectively.

[0005] Furthermore, the two transmission plates are equidistant from the center of the crossbeam.

[0006] Furthermore, a graduated groove is provided on the upper surface of the crossbeam.

[0007] Furthermore, the trimming unit includes a cylinder mounted on the front side of the slider, a slitting blade is provided below the cylinder, and the slitting blade is connected to the output end of the cylinder via a buffer assembly.

[0008] Furthermore, the buffer assembly includes a sleeve installed on the top of the slitting blade, the output end of the cylinder passing through and extending into the interior of the sleeve, a lower pressure plate slidably connected to the output end of the cylinder inside the sleeve, and a buffer spring assembled between the lower pressure plate and the inner bottom wall of the sleeve.

[0009] Furthermore, a limiting rib is vertically provided on the outer peripheral surface of the cylinder output end, and a groove adapted to the limiting rib is provided on the top of the sleeve corresponding to the limiting rib.

[0010] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. This trimming device for composite roll film can drive gears and toothed belts by starting the motor, thereby making the two sliders move synchronously in opposite or opposite directions along the guide rail. The two sliders always remain symmetrical with the center of the crossbeam, which greatly simplifies the operation steps. At the same time, the scale groove on the crossbeam can help the operator to intuitively observe the position of the sliders and quickly complete the trimming positioning. It effectively solves the problems of cumbersome adjustment and difficulty in controlling the accuracy of traditional devices, and is suitable for trimming needs of composite roll film of different widths.

[0011] 2. This trimming device for composite film rolls connects the cylinder and the slitting blade via a buffer spring. This allows for dynamic adaptation to changes in film thickness, ensuring the slitting blade always cuts with appropriate pressure, guaranteeing a smooth cut. More importantly, the buffer spring prevents rigid contact between the slitting blade and the conveyor roller, reducing blade wear, deformation, and scratches on the conveyor roller, extending component lifespan, and lowering the risk of production interruptions due to equipment damage, thus ensuring stable trimming operations. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the driving structure of this utility model; Figure 3 This is a rear view schematic diagram of the drive structure of this utility model; Figure 4 This is a schematic diagram of the trimming unit structure of this utility model.

[0013] In the diagram: 1. Support frame; 2. Conveyor roller; 3. Crossbeam; 4. Guide rail; 5. Slider; 6. Trimming unit; 601. Cylinder; 602. Sliding knife; 603. Sleeve; 604. Lower pressure plate; 605. Buffer spring; 7. Drive structure; 701. Mounting base; 702. Gear; 703. Toothed belt; 704. Motor; 705. Transmission plate. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-4 The trimming device for composite roll film in this embodiment solves the problems of traditional trimming devices that require separate adjustment of the two cutting units, are cumbersome to operate, and have low precision by means of synchronous drive adjustment and buffer cutting design. Specifically, the trimming device includes a support frame 1, a transmission roller 2, a crossbeam 3, a guide rail 4, a slider 5, a trimming unit 6, and a drive structure 7. The components work together to complete the transmission of the composite roll film and the adjustment of the trimming position. In detail, the support frame 1 is a stainless steel frame structure in the shape of a gate, with vertical bars on both sides fixed vertically to the ground. The top beam 3 is welded and fixed to the vertical bars on both sides. The transmission roller 2 is a cylindrical roller made of metal with a smooth surface. It is rotatably connected between the left and right sides of the inner wall of the support frame 1, horizontally set and located below the beam 3. It is driven to rotate by an external drive unit and is used to transmit the composite roll film to be trimmed. The composite roll film passes over the transmission roller 2 and moves at a uniform speed with the rotation of the transmission roller 2, providing a stable cutting feed for the subsequent trimming unit 6.

[0016] The crossbeam 3 is a long strip of stainless steel with a flat mounting surface on its front side for fixing the guide rail 4. A scale groove with a scale accuracy of 1mm is provided on the upper surface of the crossbeam 3 to allow the operator to visually observe the movement distance of the slider 5.

[0017] Furthermore, the guide rail 4 is a linear guide rail, fixed on the mounting surface on the front side of the crossbeam 3, extending along the length of the crossbeam 3, and has a smooth guide rail on the outer side for sliding connection of the slider 5, ensuring that the slider 5 can only move along the length of the crossbeam 3, and avoiding the slider 5 from shifting and causing the trimming unit 6 to deviate in position.

[0018] Furthermore, there are two sliders 5, made of aluminum alloy, which are slidably connected to the guide rail 4 and can move in opposite directions along the guide rail 4; each slider 5 has a trimming unit 6 fixed on its front side and a transmission plate 705 installed on its top. The transmission plate 705 is connected to the toothed belt 703 of the drive structure 7, and the slider 5 and the trimming unit 6 are synchronously adjusted in position through the transmission of the toothed belt 703.

[0019] In actual setup, there are two trimming units 6, corresponding to the two sides of the composite roll film respectively, including a cylinder 601, a slitting knife 602 and a buffer assembly, wherein the buffer assembly includes a sleeve 603, a lower pressure plate 604 and a buffer spring 605.

[0020] In detail, cylinder 601 is vertically mounted on the front side of slider 5 with its output end facing downwards, providing cutting pressure for slitting blade 602. Slitting blade 602 is made of stainless steel and has a sharp blade, used for cutting the edge material of composite roll film. Buffer assembly connects the output end of cylinder 601 to slitting blade 602. Sleeve 603 is fixed to the top of slitting blade 602 and has a hollow cavity inside. Lower pressure plate 604 is slidably connected inside sleeve 603, with its top fixed to the output end of cylinder 601. Buffer spring 605 is assembled between lower pressure plate 604 and the inner bottom wall of sleeve 603. In addition, a limiting rib is vertically provided on the outer circumference of the output end of cylinder 601, and a corresponding groove is opened on the top of sleeve 603. The limiting rib is embedded in the groove to limit the relative rotation between sleeve 603 and the output end of cylinder 601, ensuring the stability of the blade direction of slitting blade 602.

[0021] More specifically, the drive structure 7 is used to drive the two sliders 5 and the trimming unit 6 to adjust synchronously; It includes a mounting base 701, a gear 702, a toothed belt 703, a motor 704, and a transmission plate 705; The system includes two mounting bases 701, which are fixed to the left and right sides of the inner wall of the support frame 1, respectively; two gears 702, which are rotatably connected to the two mounting bases 701 via a rotating shaft; a toothed belt 703, which is an annular synchronous belt, meshes with the outer side of the two gears 702 and can rotate and circulate with the gears 702; a motor 704 is installed at the bottom of one of the mounting bases 701, and its output end is connected to the rotating shaft of the gear 702 via a coupling to provide power for the rotation of the gear 702; two transmission plates 705 are fixed to the front and rear sides of the toothed belt 703, respectively, and the distance between the two transmission plates 705 and the center of the crossbeam 3 is equal, ensuring that when the toothed belt 703 is in motion, the two sliders 5 move synchronously in opposite directions or back directions along the guide rail 4, always maintaining a symmetrical relationship with the center of the crossbeam 3.

[0022] The working principle of the above embodiments is as follows: 1. Start the motor 704 of the drive structure 7. The motor 704 drives the gear 702 to rotate. The meshing toothed belt 703 circulates along the gear 702. Since the two transmission plates 705 are fixed on the front and rear sides of the toothed belt 703 respectively and are equidistant from the center of the crossbeam 3, the toothed belt 703 will drive the two sliders 5 to move synchronously in opposite directions or back directions along the guide rail 4 when it is in motion. The operator observes the position of the sliders 5 through the scale groove on the crossbeam 3. When the two trimming units 6 move to the target position, the motor 704 is turned off, the gear 702 and the toothed belt 703 stop transmission, the position of the sliders 5 is locked, and the trimming position adjustment is completed.

[0023] 2. Start the cylinder 601 of the trimming unit 6, adjust the working air pressure of the cylinder 601 so that the output end of the cylinder 601 extends downward, pushing the lower pressure plate 604 to slide downward in the sleeve 603, compressing the buffer spring 605; the elastic force of the buffer spring 605 is transmitted to the sleeve 603 and the slitting blade 602, so that the slitting blade 602 obtains a stable cutting pressure. At this time, the limiting rib is embedded in the groove of the sleeve 603, ensuring that the blade direction of the slitting blade 602 is perpendicular to the film conveying direction and there is no rotational deviation. During the debugging process, the cylinder 601 can be added or removed. 01. The air pressure adjusts the cutting pressure to ensure that the slitting blade 602 can smoothly cut the edge material of the roll film. After the cylinder 601 pushes the slitting blade 602 into contact with the transmission roller 2, it will compress the buffer spring 605. When the thickness of the roll film increases, the spring is further compressed to provide sufficient downward pressure for the slitting blade 602 to ensure cutting through. When the thickness of the roll film decreases, the spring rebounds and pushes the slitting blade 602 to move slightly downward. At the same time, it prevents the slitting blade 602 from contacting the roll film under high pressure, which would cause the blade to wear faster. This avoids the risk of rigid collision between the slitting blade 602 and the transmission roller 2.

[0024] 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.

[0025] 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. A trimming device for composite film rolls, characterized in that: Includes a support frame and a transfer roller for transporting the composite roll film; The transmission roller is rotatably connected between the left and right sides of the inner wall of the support frame. A crossbeam is installed between the left and right sides of the inner wall of the support frame. A guide rail is provided on the front side of the crossbeam, and two sliders are slidably connected to the outer side of the guide rail. Both sliders are provided with trimming units on their front sides, and the support frame is provided with a drive structure for driving the two sliders and trimming units to move in opposite or opposite directions. The drive structure includes mounting seats installed on the left and right sides of the inner wall of the support frame, and gears are rotatably connected to both mounting seats via a rotating shaft. The outer sides of the two gears are meshed with the same toothed belt. A motor with its output end connected to the rotating shaft is provided at the bottom of one of the mounting seats. Both sliders are equipped with transmission plates, which are connected to the front and rear sides of the toothed belt, respectively.

2. The trimming device for composite film according to claim 1, characterized in that: The two transmission plates are equidistant from the center of the crossbeam.

3. The trimming device for composite film according to claim 1, characterized in that: A graduated groove is provided on the upper surface of the crossbeam.

4. The trimming device for composite film according to claim 1, characterized in that: The trimming unit includes a cylinder mounted on the front side of the slider, a slitting blade is provided below the cylinder, and the slitting blade is connected to the output end of the cylinder via a buffer assembly.

5. The trimming device for composite film according to claim 4, characterized in that: The buffer assembly includes a sleeve mounted on the top of the slitting blade, the output end of the cylinder passing through and extending into the interior of the sleeve, a lower pressure plate slidably connected to the output end of the cylinder inside the sleeve, and a buffer spring assembled between the lower pressure plate and the inner bottom wall of the sleeve.

6. The trimming device for composite film according to claim 5, characterized in that, A limiting rib is vertically provided on the outer peripheral surface of the cylinder output end, and a groove adapted to the limiting rib is provided on the top of the sleeve corresponding to the limiting rib.

Images