Film fixing structure of film sticking machine

Abstract

The utility model relates to a film laminating machine technical field especially is concerned about a kind of film laminating machine roll film fixing structure preventing roll film loose, including fixed base, the rod piece of rotation connection on fixed base, the buffer piece of connection on rod piece and with the damping cooperation of fixed base, and the roll film fixing piece of connection on rod piece;Roll film fixing function and buffer anti-loose function are integrated in the same structure, without additional setting independent buffer component, simplify the overall structure of film laminating machine, reduce the installation space occupancy, reduce the equipment design, manufacture and debugging cost;And roll film fixing piece adjusts the distance of movable cone sleeve and fixed cone sleeve by second adjusting knob, utilizes bevel abutment drive tensioning piece expansion, cooperate the restraint of elastic ring, realize the quick clamping of roll film and stable fixing, and adapt to roll film of different inner diameter, and strong universality, stable simultaneously mechanical structure drive, compared with traditional electric expansion structure, failure rate is lower, and maintenance is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of film applicator technology, and in particular to a film roll fixing structure for an applicator to prevent the film roll from becoming loose. Background Technology

[0002] In the field of automated production, laminating machines, as the core equipment for bonding film materials to product surfaces, are widely used in the processing of various products such as electronic components, plastic products, and hardware. Through automated feeding, positioning, and bonding processes, they not only significantly improve the efficiency of laminating operations but also ensure laminating accuracy and consistency, meeting the needs of large-scale production.

[0003] In the continuous feeding system of a laminating machine, the film roll fixing structure is an indispensable key component. Its core function is to stably fix the rolled film, ensuring that the film does not shift, loosen, or fall off during subsequent feeding. Currently, the industry commonly uses an expansion-type fixing solution, which involves attaching the film roll to the outside of an expandable drum. The radial tension generated by the drum's expansion supports the inner wall of the film roll, thereby achieving relative fixation between the film roll and the drum. During the feeding stage, driven by the power rollers on the laminating machine, the film roll rotates around the drum, and the film is smoothly pulled out and conveyed to the lamination station, ultimately achieving continuous and stable feeding.

[0004] However, most current mainstream expansion structures employ electric drive, using a complex combination of components such as motors, transmission gears, and lead screws to achieve the expansion and contraction of the roll. This electrically driven expansion structure not only has a large number of parts and a complex structure, resulting in high manufacturing costs, but also suffers from wear and jamming in the transmission components during long-term, high-frequency use, increasing the difficulty and cost of equipment maintenance, while also reducing the reliability and stability of film fixation.

[0005] Furthermore, during the film feeding process, factors such as fluctuations in the rotational speed of the power roller, the gradual reduction in the film diameter, and changes in the tension of the film itself can easily cause the film roll to loosen, leading to wrinkles and misalignment, thus affecting the subsequent lamination quality. To solve this problem, existing laminating machines typically have an additional buffer structure to absorb tension fluctuations during the feeding process, buffer the release speed of the film roll, and prevent the film from loosening. However, in existing technologies, the buffer structure and the film roll fixing structure are mostly two independent components, requiring separate design, installation, and debugging, which increases the complexity of the overall equipment structure and occupies more installation space.

[0006] Therefore, it is necessary to propose an improved technical solution to address the above problems. Utility Model Content

[0007] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0008] A film roll fixing structure for a film applicator to prevent film roll from loosening includes a fixed base, a rod rotatably connected to the fixed base, a buffer connected to the rod and damping cooperation with the fixed base, and a film roll fixing component connected to the rod. Both ends of the rod are provided with threaded structures. The buffer includes a compression spring sleeved on one end of the rod and a first adjusting knob threaded on one end of the rod. The compression spring abuts against the first adjusting knob and the fixed seat, and applies a compression force to the fixed seat by tightening the adjusting knob and the thread of the rod. The film winding fastener includes a base, a fixed cone sleeve, a movable cone sleeve, a second adjusting knob, multiple tensioning plates, and multiple elastic rings. The fixed cone sleeve is fixedly connected to the rod, the base is fixed to the fixed cone sleeve, and the movable cone sleeve is movably sleeved on the rod and cooperates with the fixed cone sleeve. The second adjusting knob is threaded to the other end of the rod and controls the distance between the movable cone sleeve and the fixed cone sleeve by cooperating with the threaded part of the rod. The multiple tensioning plates are wrapped around the fixed cone sleeve and the movable cone sleeve by multiple elastic rings, and the tensioning plates abut against the fixed cone sleeve and the movable cone sleeve at an angle.

[0009] Preferably, the fixed base includes a fixed plate, multiple fixed rods connected to the fixed plate, an extrusion plate connected to the multiple fixed rods, and a bearing seat fixedly installed on the fixed plate. The rods pass through the fixed plate and the extrusion plate and are connected to the bearing seat. The extrusion plate is mated with the buffer.

[0010] Preferably, the buffer also includes a compression sleeve fitted on the rod, the compression sleeve abutting between the fixed seat and the compression spring.

[0011] Preferably, the buffer further includes a first wear sleeve fitted on the rod, the first wear sleeve abutting between the compression sleeve and the compression spring.

[0012] Preferably, both the fixed cone sleeve and the movable cone sleeve include a connecting shaft portion, a tapered portion axially formed on the connecting shaft portion, and a limiting portion axially formed on the tapered portion. The fixed cone sleeve and the movable cone sleeve are limited and engaged by the abutting of the limiting portion. The fixed cone sleeve and the movable cone sleeve abut against the tensioning plate at an angle through the tapered portion. The fixed cone sleeve is screwed to the rod through the connecting shaft portion, and the movable cone sleeve abuts against the second adjusting knob through the connecting shaft portion.

[0013] Preferably, the tensioning sheet has an arc-shaped structure and is provided with at least three tensioning sheets.

[0014] Preferably, the tensioning plate is provided with multiple limiting grooves that extend through both sides, and the elastic ring is engaged with the limiting grooves. The elastic ring is positioned and engaged with the tensioning plate through the limiting grooves.

[0015] Preferably, the film fixing component further includes a second wear sleeve, which is sleeved on the rod and abuts between the second adjusting knob and the movable cone sleeve.

[0016] Compared with the prior art, the beneficial effects of this utility model are: Integrating the film roll fixing function and the buffering and anti-loosening function into the same structure eliminates the need for separate buffer components, simplifying the overall structure of the laminator, reducing installation space occupation, and lowering equipment design, manufacturing, and debugging costs. The film roll fixing component adjusts the distance between the movable and fixed cone sleeves via a second adjustment knob, utilizing the inclined surface to drive the tension plate expansion. Combined with the constraint of the elastic ring, this achieves rapid clamping and stable fixing of the film roll, adapting to different inner diameter film rolls, offering strong versatility. The mechanical structure drive is stable, resulting in a lower failure rate and easier maintenance compared to traditional electric expansion structures. Furthermore, the buffer component, through the cooperation of the first adjustment knob and the compression spring, allows for precise adjustment of the damping force, flexibly adjusting according to the film roll material, diameter, and feeding speed. This effectively buffers tension fluctuations, preventing film roll loosening, wrinkling, or shifting, ensuring lamination quality.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of the present invention in use; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is an exploded structural diagram of the film-rolling fixing component in this utility model.

[0020] The reference numerals and names in the figure are as follows: Fixed base 10, fixed plate 11, fixed rod 12, extrusion plate 13, bearing seat 14, rod 20, buffer 30, extrusion spring 31, first adjustment knob 32, extrusion sleeve 33, first wear sleeve 34, film roll fixing component 40, chassis 41, fixed cone sleeve 42, movable cone sleeve 43, second adjustment knob 44, tension plate 45, limiting groove 451, elastic ring 46, second wear sleeve 47, connecting shaft part 51, conical part 52, limiting part 53. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Please see Figure 1-3 In this embodiment of the utility model, a film roll fixing structure for preventing film roll loosening in a film applicator includes a fixing seat 10, a rod 20 rotatably connected to the fixing seat 10, a buffer 30 connected to the rod 20 and dampingly cooperating with the fixing seat 10, and a film roll fixing member 40 connected to the rod 20. Both ends of the rod 20 are provided with threaded structures. The buffer 30 includes a compression spring 31 sleeved on one end of the rod 20 and a first adjustment knob 32 threadedly connected to one end of the rod 20. The compression spring 31 abuts against the first adjustment knob 32 and the fixed seat 10, and applies a compression force to the fixed seat 10 by tightening the adjustment knob and the thread of the rod 20. The film roll fixing component 40 includes a base 41, a fixed cone sleeve 42, a movable cone sleeve 43, a second adjusting knob 44, multiple tensioning plates 45, and multiple elastic rings 46. The fixed cone sleeve 42 is fixedly connected to the rod 20, the base 41 is fixed to the fixed cone sleeve 42, and the movable cone sleeve 43 is movably sleeved on the rod 20 and cooperates with the fixed cone sleeve 42. The second adjusting knob 44 is threaded to the other end of the rod 20. The second adjusting knob 44 controls the distance between the movable cone sleeve 43 and the fixed cone sleeve 42 by cooperating with the thread of the rod 20. The multiple tensioning plates 45 are wrapped around the fixed cone sleeve 42 and the movable cone sleeve 43 by multiple elastic rings 46, and the tensioning plates 45 abut against the fixed cone sleeve 42 and the movable cone sleeve 43 at an angle.

[0023] In use, the film roll is stably fixed by the film roll fixing component 40. The film roll is sleeved on the outside of the multiple tensioning plates 45. Rotating the second adjusting knob 44, through its cooperation with the threaded structure at the other end of the rod 20, pushes the movable cone sleeve 43 to move along the axial direction of the rod 20 towards the fixed cone sleeve 42. Since the tensioning plates 45 are in inclined contact with the fixed cone sleeve 42 and the movable cone sleeve 43 respectively, the movement of the movable cone sleeve 43 will cause the multiple tensioning plates 45 to expand outward through the inclined surface compression. At the same time, the elastic ring 46 provides reverse constraint to ensure the uniformity of the expansion of the tensioning plates 45, until the tensioning plates 45 tightly abut against the inner wall of the film roll, completing the fixing of the film roll. During the film roll feeding process, the power roller pulls the film material to drive the film roll. The film roll fixing component 40 and the rod 20 rotate synchronously. At this time, the buffer component 30 connected to the rod 20 forms a damping engagement with the fixing seat 10. Specifically, by rotating the first adjustment knob 32, the spring 31 is compressed by the engagement of the first adjustment knob with the threaded structure at one end of the rod 20. The compression force generated by the spring on the fixing seat 10 is converted into a damping force between the buffer component 30 and the fixing seat 10. The magnitude of the damping force can be precisely controlled by adjusting the first adjustment knob 32. In turn, the rotation speed of the rod 20 is buffered by the damping effect, which offsets the influence of tension fluctuations during the feeding process and effectively prevents the film roll from loosening. At the same time, the elastic characteristics of the compression spring 31 can adaptively absorb the speed fluctuations, further ensuring the smoothness of the film roll release.

[0024] Therefore, by using the above technical solution, the film fixing function and the buffering and anti-loosening function are integrated into the same structure, eliminating the need for additional independent buffer components. This simplifies the overall structure of the film applicator, reduces installation space occupation, and lowers equipment design, manufacturing, and debugging costs. Furthermore, the film fixing component 40 adjusts the distance between the movable cone sleeve 43 and the fixed cone sleeve 42 via the second adjustment knob 44. It utilizes the inclined surface to abut against and drive the tension plate 45 to expand, and with the constraint of the elastic ring 46, it achieves rapid clamping and stable fixing of the film roll. It is also compatible with films of different inner diameters, offering strong versatility. At the same time, the mechanical structure drive is stable, resulting in a lower failure rate and easier maintenance compared to traditional electric expansion structures. In addition, the buffer component 30 achieves precise adjustment of damping force through the cooperation of the first adjustment knob 32 and the compression spring 31. It can be flexibly adjusted according to the film material, diameter, and feeding speed, effectively buffering tension fluctuations, preventing the film roll from becoming loose, wrinkled, or shifted, and ensuring the quality of film application.

[0025] Please see Figure 2Based on the above technical solution, it is further proposed that the fixed base 10 includes a fixed plate 11, multiple fixed rods 12 connected to the fixed plate 11, a pressing plate 13 connected to the multiple fixed rods 12, and a bearing seat 14 fixedly installed on the fixed plate 11. The rod 20 passes through the fixed plate 11 and the pressing plate 13 and is connected to the bearing seat 14. The pressing plate 13 is mated with the buffer 30. The structure, consisting of a fixed plate 11, multiple fixed rods 12, and an extrusion plate 13, forms a stable frame support structure. This structure not only provides a solid installation foundation for the rods 20, buffers 30, and film roll fixing components 40, but also effectively disperses the forces generated by each component during operation, preventing structural deformation or damage caused by concentrated stress in a single area, thus improving the overall load-bearing capacity and long-term stability of the structure. Simultaneously, the bearing seat 14, fixedly mounted on the fixed plate 11, forms a precise bearing connection with the rods 20, converting the sliding friction of the rods 20 during rotation into rolling friction, reducing the rotational resistance of the rods 20, minimizing component wear, extending service life, and ensuring the coaxiality of the rods 20's rotation, preventing rotational deviation from affecting the smoothness of film roll release. Furthermore, the mating fit between the extrusion plate 13 and the buffers 30 ensures that the spring's compressive force is evenly transmitted to the extrusion plate 13 during adjustment of the buffers 30, thereby maintaining a stable damping force between the buffers 30 and the fixed seat 10, preventing damping force fluctuations due to mating deviations, and further ensuring the reliability of the buffering and anti-loosening effect.

[0026] Please see Figure 2 Based on the above technical solution, it is further proposed that the buffer 30 also includes a compression sleeve 33 sleeved on the rod 20. The compression sleeve 33 abuts between the fixed seat 10 and the compression spring 31. It can convert the axial compression force of the compression spring 31 into a uniform surface contact force and transmit it to the fixed seat 10. This avoids the local stress concentration caused by the spring directly contacting the fixed seat 10 rigidly. It not only protects the contact end between the fixed seat 10 and the spring, but also allows the compression force of the spring to act more smoothly on the fixed seat 10, ensuring the stability during damping force adjustment.

[0027] The buffer 30 also includes a first wear sleeve 34 sleeved on the rod 20. The first wear sleeve 34 is connected between the compression sleeve 33 and the compression spring 31. The first wear sleeve 34 can directly bear the relative friction between the compression sleeve 33 and the compression spring 31, avoiding wear and deformation of the compression sleeve 33 and the compression spring 31 due to long-term friction. This effectively extends the service life of the core component of the buffer 30 and reduces the frequency of component replacement. At the same time, when the first wear sleeve 34 wears out, only the wear sleeve needs to be replaced. There is no need to replace the entire buffer 30 or other related components, which greatly reduces the maintenance cost and difficulty of the equipment and further improves the practicality and economy of the entire film fixing structure.

[0028] Please see Figure 3Based on the above technical solution, it is further proposed that both the fixed cone sleeve 42 and the movable cone sleeve 43 include a connecting shaft portion 51, a tapered portion 52 axially formed on the connecting shaft portion 51, and a limiting portion 53 axially formed on the tapered portion 52. The fixed cone sleeve 42 and the movable cone sleeve 43 are limited and engaged by the abutment of the limiting portion 53. The fixed cone sleeve 42 and the movable cone sleeve 43 are engaged with the tensioning plate 45 at an inclined surface by the tapered portion 52. The fixed cone sleeve 42 is screwed to the rod 20 by the connecting shaft portion 51, and the movable cone sleeve 43 is engaged with the second adjusting knob 44 by the connecting shaft portion 51.

[0029] In the above technical solution, the fixed cone sleeve 42 is fixed to the rod 20 with screws through the connecting shaft 51, which can achieve a firm connection with the rod 20 and prevent the fixed cone sleeve 42 from loosening or shifting during the rotation of the film roll, thus ensuring the basic stability of the film roll fixation; the movable cone sleeve 43 is engaged with the second adjusting knob 44 through the connecting shaft 51, so that the axial thrust of the second adjusting knob 44 can be accurately transmitted to the movable cone sleeve 43, ensuring the smoothness of the movable cone sleeve 43 moving along the axial direction of the rod 20, and providing a stable driving force for the uniform expansion of the tensioning plate 45. The two components abut against the tensioning plate 45 at an angle via an axially formed tapered portion 52. The regular angled structure of the tapered portion 52 allows for a higher degree of contact with the tensioning plate 45, avoiding uneven local compression caused by irregular contact surfaces. This ensures that each tensioning plate 45 expands synchronously and evenly when the movable tapered sleeve 43 moves, thereby ensuring consistent stress on the inner wall of the film roll, improving the stability of the film roll fixation, and reducing local wear between the tensioning plate 45 and the tapered sleeve. In addition, the fixed tapered sleeve 42 and the movable tapered sleeve 43 are engaged by a limiting portion 53, which effectively limits the maximum distance the movable tapered sleeve 43 can move towards the fixed tapered sleeve 42. This prevents the movable tapered sleeve 43 from excessively compressing the tensioning plate 45 due to over-tightening of the second adjusting knob 44, preventing deformation and damage to the tensioning plate 45 or the elastic ring 46 due to excessive force. It also prevents the inner wall of the film roll from being damaged by excessive compression, providing safety protection for the operation of the structure.

[0030] Please see Figure 3 Based on the above technical solution, it is further proposed that the tensioning plate 45 has an arc-shaped structure. The arc-shaped structure can form a more closely fitting curved surface contact with the inner wall of the roll film. Compared with the planar structure, it can significantly increase the contact area. With the surrounding distribution of multiple tensioning plates 45, the inner wall of the roll film can be subjected to more uniform force, effectively avoiding roll film deformation or loosening caused by local stress concentration. At least three tensioning plates 45 are provided to ensure the uniformity of the tension force applied to the roll film.

[0031] The tension plate 45 is provided with multiple limiting grooves 451 extending through both sides. The elastic ring 46 is mated in the limiting grooves 451, and the elastic ring 46 is positioned and engaged with the tension plate 45 through the limiting grooves 451. This can limit the position of the elastic ring 46 on the tension plate 45, preventing the elastic ring 46 from shifting or slipping due to the expansion and contraction of the tension plate 45 or the rotation of the film. This ensures that the elastic ring 46 always provides uniform radial constraint to the tension plate 45, guaranteeing the synchronicity and stability of the expansion of the tension plate 45. At the same time, the limiting grooves 451 can also reduce the relative friction between the elastic ring 46 and the tension plate 45, extending the service life of the elastic ring 46.

[0032] The film fixing component 40 also includes a second wear sleeve 47, which is sleeved on the rod 20 and abuts between the second adjusting knob 44 and the movable cone sleeve 43. The second wear sleeve 47 can directly withstand the axial compression friction between the second adjusting knob 44 and the movable cone sleeve 43, avoiding wear and deformation of the contact surface of the adjusting knob or the movable cone sleeve 43 due to long-term friction, ensuring the stability of the fit clearance between the two, and ensuring the accuracy of the second adjusting knob 44 in controlling the movement distance of the movable cone sleeve 43.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A film roll fixing structure for a film applicator to prevent film roll from becoming loose, characterized in that, It includes a fixed base (10), a rod (20) rotatably connected to the fixed base (10), a buffer (30) connected to the rod (20) and damping cooperation with the fixed base (10), and a roll film fixing member (40) connected to the rod (20). Both ends of the rod (20) are provided with threaded structures. The buffer (30) includes a compression spring (31) sleeved on one end of the rod (20) and a first adjustment knob (32) threaded on one end of the rod (20). The compression spring (31) abuts against the first adjustment knob (32) and the fixed seat (10), and applies a compression force to the fixed seat (10) by tightening the adjustment knob and the thread of the rod (20). The film roll fixing component (40) includes a base (41), a fixed cone sleeve (42), a movable cone sleeve (43), a second adjusting knob (44), multiple tension plates (45), and multiple elastic rings (46). The fixed cone sleeve (42) is fixedly connected to the rod (20), the base (41) is fixed on the fixed cone sleeve (42), and the movable cone sleeve (43) is movably sleeved on the rod (20) and cooperates with the fixed cone sleeve (42); the second adjusting knob (44) The threaded connection is to the other end of the rod (20). The second adjustment knob (44) controls the distance between the movable cone sleeve (43) and the fixed cone sleeve (42) by engaging with the thread of the rod (20). Multiple tensioning plates (45) are wrapped around the fixed cone sleeve (42) and the movable cone sleeve (43) by multiple elastic rings (46) around the outside. The tensioning plates (45) are respectively in inclined contact with the fixed cone sleeve (42) and the movable cone sleeve (43).

2. The film roll fixing structure for preventing film roll loosening in a film applicator according to claim 1, characterized in that, The fixed base (10) includes a fixed plate (11), multiple fixed rods (12) connected to the fixed plate (11), a pressing plate (13) connected to the multiple fixed rods (12), and a bearing seat (14) fixedly installed on the fixed plate (11). The rod (20) passes through the fixed plate (11) and the pressing plate (13) and is connected to the bearing seat (14) by bearing. The pressing plate (13) is mated with the buffer (30).

3. The film roll fixing structure for preventing film roll loosening in a film applicator according to claim 1, characterized in that, The buffer (30) also includes a compression sleeve (33) sleeved on the rod (20), the compression sleeve (33) abutting between the fixed seat (10) and the compression spring (31).

4. The film roll fixing structure for preventing film roll loosening in a film applicator according to claim 3, characterized in that, The buffer (30) also includes a first wear sleeve (34) sleeved on the rod (20), the first wear sleeve (34) abutting between the compression sleeve (33) and the compression spring (31).

5. The film roll fixing structure for preventing film roll loosening in a film applicator according to claim 1, characterized in that, Both the fixed cone sleeve (42) and the movable cone sleeve (43) include a connecting shaft (51), a tapered part (52) axially formed on the connecting shaft (51), and a limiting part (53) axially formed on the tapered part (52). The fixed cone sleeve (42) and the movable cone sleeve (43) are limited by the contact of the limiting part (53). The fixed cone sleeve (42) and the movable cone sleeve (43) are in inclined contact with the tensioning plate (45) through the tapered part (52). The fixed cone sleeve (42) is screwed to the rod (20) through the connecting shaft (51), and the movable cone sleeve (43) is in contact with the second adjusting knob (44) through the connecting shaft (51).

6. The film roll fixing structure for preventing film roll loosening in a film applicator according to claim 1, characterized in that, The tensioning plate (45) has an arc-shaped structure and is provided with at least three pieces.

7. The film roll fixing structure for preventing film roll loosening in a film applicator according to claim 1, characterized in that, The tension plate (45) is provided with multiple limiting channels (451) that run through both sides. The elastic ring (46) is connected to the limiting channel (451). The elastic ring (46) is positioned and cooperates with the tension plate (45) through the limiting channel (451).

8. The film roll fixing structure for preventing film roll loosening in a film applicator according to claim 1, characterized in that, The film fixing member (40) also includes a second wear sleeve (47), which is sleeved on the rod (20) and is mated between the second adjusting knob (44) and the movable cone sleeve (43).

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