A reflective film beading device and production equipment thereof

Abstract

The application discloses a reflective film bead implanting device, which comprises a rack, a roller assembly arranged on the rack, a bead arranging assembly and a driving assembly. The roller assembly at least comprises a heating roller, which is used for driving the reflective film to move and performing heating treatment on the reflective film. The bead arranging assembly comprises a bead arranging groove and a bearing plate arranged in the bead arranging groove and used for bearing glass beads. The driving assembly is in transmission connection with the bead arranging assembly and is used for driving the bead arranging groove to be close to the heating roller, so that the glass beads in the bead arranging groove are attached to the reflective film on the surface of the heating roller. The application further discloses a reflective film production equipment comprising the reflective film bead implanting device.

Description

Technical Field

[0001] This utility model relates to the technical field of reflective material processing equipment, specifically to a reflective film beading device and reflective film production equipment including the device. Background Technology

[0002] Glass microsphere reflective film is a functional film material widely used in traffic signs, license plates, advertising materials and safety warning devices. Its reflective performance mainly depends on the uniform distribution and stable adhesion of glass microspheres on the film surface.

[0003] In related technologies, glass microspheres are typically spread onto the surface of an adhesive film using simple mechanical methods, and then heated or compacted to form a reflective layer. However, this bead-planting process suffers from poor uniformity of bead distribution, with glass microspheres easily accumulating or leaving gaps, resulting in inconsistent brightness of the reflective film. Furthermore, floating beads are difficult to remove effectively, affecting the flatness of the film surface and the product's appearance quality. In addition, the microspheres have insufficient adhesion and are prone to detaching during use, reducing their service life. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a reflective film beading device that can achieve uniform distribution of glass microspheres on the surface of the reflective film.

[0005] This utility model provides a reflective film beading device, including a frame, a roller assembly, a beading assembly, and a drive assembly mounted on the frame. The roller assembly includes at least a heating roller, which is used to drive the reflective film to move and heat it. The beading assembly includes a beading groove and a support plate for carrying glass microspheres disposed in the beading groove. The drive assembly is driven to the beading assembly and is used to drive the beading groove closer to the heating roller, so that the glass microspheres in the beading groove adhere to the reflective film on the surface of the heating roller.

[0006] In one embodiment, the support plate has multiple air inlets with a diameter smaller than that of the glass microspheres. The bottom of the bead distribution groove has multiple partitions, which form multiple air chambers at the bottom of the bead distribution groove to separate airflow channels. The support plate is laid flat on top of the partitions.

[0007] In one embodiment, the bead assembly further includes a plurality of air inlet pipes disposed at the bottom of the bead groove. The plurality of air inlet pipes are arranged sequentially along the radial direction of the bead groove and are respectively connected to the plurality of air chambers. The plurality of air inlet pipes are used to obtain an air source and inject dry negative ion air into the bead groove, and to spray the negative ion air upward through the air chambers and the air inlet holes.

[0008] In one embodiment, the bead-planting device further includes a floating bead removal assembly, which includes at least one air blowing pipe. One end of the air blowing pipe passes through the frame and is bent toward the non-bead surface of the reflective film to obtain an air source and blow negative ion air onto the non-bead surface of the reflective film, so as to generate aerodynamic resonance on the surface of the reflective film.

[0009] In one embodiment, the bead-planting device further includes a pressure roller assembly, which includes a drive roller and a driven roller. The drive roller and the driven roller are arranged opposite to each other, forming a rolling pressing area between them, for rolling the reflective film after the beads have been planted.

[0010] In one embodiment, the driving roller is made of steel and is used to press the beaded surface of the reflective film, while the driven roller is made of rubber and is used to press the non-beaded surface of the reflective film.

[0011] In one embodiment, the pressure roller assembly further includes a plurality of guide rollers, which are respectively disposed at the feed end and / or discharge end of the active roller and the driven roller, for guiding the reflective film after the beading is completed to enter or leave the rolling area between the active roller and the driven roller along a predetermined path.

[0012] In one embodiment, the bead-planting device further includes a vacuum adsorption component, which includes a vacuum negative pressure pump and an adsorption tube connected to the vacuum negative pressure pump. The adsorption tube is used to adsorb the floating beads on the reflective film by the negative pressure suction generated by the vacuum negative pressure pump.

[0013] In one embodiment, the adsorption tube has an adsorption groove formed on the reflective film bead surface. The adsorption groove is used to concentrate the negative pressure suction force generated by the vacuum negative pressure pump onto the bead surface, so that the floating beads on the bead surface are adsorbed into the interior of the adsorption tube.

[0014] This utility model also provides a reflective film production equipment, including a drying tunnel and a reflective film beading device as described in the above embodiment. The drying tunnel is located downstream of the reflective film beading device and is used to perform heat treatment on the reflective film after the beading and rolling processes are completed.

[0015] This invention provides a reflective film beading device. A heating roller, a beading groove, and a support plate for carrying glass microspheres are arranged on a frame. A drive assembly moves the beading groove closer to the heating roller. Since the heating roller has both heating and driving functions, it can simultaneously heat and soften the reflective film while driving it, allowing the glass microspheres to adhere more firmly to the film surface and improving the initial bonding effect. The drive assembly adjusts the gap between the beading groove and the heating roller, making the bead placement and applied pressure more precise and controllable. This enhances the uniformity of contact between the glass microspheres and the reflective film surface during the beading process, reducing accumulation and scattering. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A side view of a reflective film beading device provided in a preferred embodiment of this utility model.

[0018] Figure 2 This is a front view of a reflective film beading device provided in a preferred embodiment of the present invention.

[0019] Figure 3 A perspective view of a reflective film beading device provided in a preferred embodiment of this utility model.

[0020] Figure 4 A schematic diagram of the structure of the bead assembly provided in a preferred embodiment of this utility model.

[0021] Figure 5 This is a schematic diagram of a reflective film production equipment provided in a preferred embodiment of the present invention.

[0022] Figure label: 1. Frame; 2. Roller assembly; 3. Bead assembly; 4. Drive assembly; 5. Air inlet pipe; 6. Air blowing pipe; 7. Reflective film; 8. Adsorption pipe; 9. Drive roller; 10. Driven roller; 11. Guide roller; 12. Partition plate; 13. Air chamber. Detailed Implementation

[0023] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," etc., 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 mechanical connection or an electrical 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 according to the specific circumstances.

[0025] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0027] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0028] Please refer to Figures 1 to 3 This utility model provides a reflective film bead-planting device, comprising a frame 1, a roller assembly 2, a bead-laying assembly 3, and a drive assembly 4. The roller assembly 2 is mounted on the frame 1 and includes a heating roller for driving the reflective film 7 to move in a predetermined direction and for heating the reflective film 7. The bead-laying assembly 3 includes a bead groove and a support plate disposed within the bead groove, the support plate for holding glass microspheres. The drive assembly 4 is drively connected to the bead-laying assembly 3 and drives the bead groove closer to the heating roller, causing the glass microspheres in the bead groove to adhere to the reflective film 7 on the surface of the heating roller, thereby completing the initial bead-planting process.

[0029] Because the heating roller has both heating and driving functions, it can heat and soften the reflective film 7 while driving it to move, making the glass microspheres adhere more firmly to the film surface and improving the initial bonding effect of the beads. By adjusting the gap between the bead distribution groove and the heating roller through the driving component 4, the position of the beads and the applied pressure can be made more precise and controllable, thereby enhancing the uniformity of contact between the glass microspheres and the surface of the reflective film 7 during the bead distribution process and reducing accumulation and scattering.

[0030] In this embodiment, as Figure 2 As shown, the drive component 4 is a cylinder. The extension and retraction of the cylinder achieves precise approach and separation between the bead groove and the heating roller. It has a simple structure, fast response, and is easy to adjust and control. It can be understood that the drive component 4 can also be replaced by a mechanical transmission mechanism, electric actuator, or servo drive device to achieve higher precision or automated positioning and pressure adjustment of the bead groove, depending on the specific process requirements. No single limitation is made here.

[0031] In this embodiment, as Figure 4As shown, the bottom of the bead distribution trough is provided with multiple partitions 12, which are arranged at intervals to form multiple air chambers 13 at the bottom of the bead distribution trough. A support plate is laid flat above the partitions 12, and multiple air inlets are evenly opened on the support plate. The diameter of the air inlets is smaller than the diameter of the glass microspheres to prevent the glass microspheres from leaking into the air chambers 13. Multiple air inlet pipes 5 are arranged radially along the bottom of the bead distribution trough, and each air inlet pipe 5 is connected to a corresponding air chamber 13 to introduce dry negative ion air into the air chamber 13. The multiple air inlet pipes 5 are connected to an air source and connected to a negative ion blowing component. After being injected through the air inlet pipes 5, the negative ion air passes through the air chambers 13 and is then sprayed upward from the air inlets of the support plate, acting on the glass microspheres located on the support plate to improve the dispersion and flowability of the glass microspheres during the bead distribution process and prevent agglomeration or accumulation.

[0032] Optionally, the negative ion blowing assembly includes a negative ion generator, an air compressor, and a dehumidifier. The air compressor provides compressed air, and the dehumidifier dehumidifies the compressed air to ensure that the air entering the bead distribution channel has a low moisture content, preventing the glass microspheres from sticking or accumulating due to moisture. The negative ion generator introduces negative ions into the compressed air, forming dry, negatively ionized air. By using this negative ion blowing assembly, not only can the cleanliness and dryness of the airflow in the bead distribution channel be improved, preventing the glass microspheres from becoming damp and affecting their flowability, but negative ions can also effectively eliminate electrostatic adsorption on the surface of the glass microspheres and the membrane material, further improving the dispersion and uniformity of the glass microspheres.

[0033] Furthermore, the bead-planting device also includes a floating bead removal assembly, which includes an air blowing pipe 6 disposed above the bead-planting area. The air blowing pipe 6 is a universal bamboo-joint tube, with one end fixed to the frame 1 and the other end bent towards the non-bead-planting surface of the reflective film 7. The air blowing pipe 6 is connected to an air source and is used to spray a high-speed negative ion airflow, which acts on the non-bead-planting surface of the reflective film 7.

[0034] During operation, after the glass microspheres are initially attached to the bead surface of the reflective film 7, high-speed negative ion air ejected from the universal bamboo-joint tube is blown in from the back of the reflective film 7. Through the flexible conduction of the thin film structure, the film body is caused to produce micro-vibrations in a local area, thus forming an aerodynamic resonance effect on the bead surface. Due to the micro-periodic resonance of the reflective film 7 under the action of air, the poorly attached or floating glass microspheres will be disturbed, causing them to detach from the film surface and fall back into the bead groove, avoiding the floating beads remaining and affecting the flatness of the film surface.

[0035] In this embodiment, the bead-planting device further includes a pressure roller assembly, which is located downstream of the bead-laying process and is used to roll-press the reflective film 7 after bead-laying. The pressure roller assembly includes a pair of opposing rollers, namely a driving roller 9 and a driven roller 10. The driving roller 9 is made of steel, which is rigid and has high hardness. Its working surface corresponds to the bead-laying surface of the reflective film 7, and it is used to provide stable linear pressure to press the pre-attached glass microbeads onto the film surface during the bead-laying process. The driven roller 10 is made of rubber, which has a certain degree of flexibility. Its working surface corresponds to the non-bead-laying surface of the reflective film 7, and it is used to provide cushioning support to avoid deformation or damage to the film material.

[0036] Preferably, the pressure roller assembly further includes a plurality of guide rollers 11, which are respectively disposed at the feed end and / or discharge end of the drive roller 9 and the driven roller 10, for guiding the reflective film 7 after the beading is completed into or out of the rolling area between the drive roller 9 and the driven roller 10 along a predetermined path. During the rolling process, after the reflective film 7 is output from the beading assembly 3, it is guided by the guide rollers 11 into the rolling area formed between the drive roller 9 and the driven roller 10. With the help of the pressure between the two rollers, the glass microbeads are further pressed into the adhesive layer on the film surface of the reflective film 7, enhancing the contact tightness and adhesion between the microbeads and the film material.

[0037] In one embodiment, the bead-planting device further includes a vacuum adsorption assembly located downstream of the pressure roller assembly or after the floating bead removal process, for further removing floating beads remaining on the surface of the reflective film 7. The vacuum adsorption assembly includes a vacuum negative pressure pump and an adsorption tube 8, the adsorption tube 8 being connected to the vacuum negative pressure pump to create negative pressure suction within it. The adsorption tube 8 is located on one side of the bead-planting surface of the reflective film 7 and extends along the width direction of the reflective film 7. After the vacuum negative pressure pump is started, a continuous negative pressure zone is formed in the opening area of ​​the adsorption tube 8, adsorbing and recovering the floating beads on the surface of the reflective film 7.

[0038] In actual operation, even after the reflective film 7 has been finished with beads and undergone pneumatic resonance and roller pressing, there may still be a small number of loosely attached beads. The directional negative pressure suction generated by the adsorption tube 8 can promptly draw these microbeads into the tube, preventing them from entering the subsequent drying tunnel or adhering to the film surface, thus affecting the product's appearance and reflective performance.

[0039] Specifically, the adsorption tube 8 is equipped with adsorption grooves corresponding to the bead-laying surface of the reflective film 7. These grooves extend along the length of the adsorption tube 8, forming a negative pressure adsorption zone. The openings of the adsorption grooves face the bead-laying surface of the reflective film 7, concentrating the suction force generated by the vacuum negative pressure pump and directing it towards the glass microsphere planting area. During the transport of the reflective film 7, as the bead-laying surface passes through the adsorption grooves, a localized strong negative pressure is created within the opening area of ​​the grooves. This effectively captures loosely attached or residual floating beads and draws them into the adsorption tube 8 for unified recycling or filtration. By setting adsorption grooves on the adsorption tube 8, the negative pressure suction is concentrated on the target bead-laying area, avoiding efficiency reduction due to suction dispersion and preventing excessive suction from disturbing non-bead-laying areas. This structure improves the efficiency of floating bead removal while ensuring the accuracy of the adsorption process and the stability of the membrane material operation.

[0040] Optionally, the adsorption tube 8 is a C-shaped stainless steel grooved tube. This structure has high strength and corrosion resistance, which can improve the overall rigidity and service life of the adsorption structure while ensuring adsorption efficiency. It is suitable for continuous bead production conditions with complex dust environments.

[0041] like Figure 5 As shown, this utility model embodiment also provides a reflective film production equipment, including a drying tunnel and a reflective film beading device as described above. The drying tunnel is located downstream of the reflective film beading device and is used to perform heat treatment on the reflective film 7 after the beading and rolling processes are completed.

[0042] The beading process of the reflective film 7 in this embodiment of the present invention is as follows: After the reflective film 7 is driven and softened by the heating roller, it passes through the bead assembly 3. The bead groove carrying glass microbeads approaches the surface of the heating roller, and the microbeads are evenly attached to the film surface. The bottom of the bead trough sprays dry negative ion air onto the microbeads on the support plate through the negative ion blowing component, which improves the dispersion of the microbeads and prevents static electricity accumulation. After the beads are placed, the negative ion blowing pipe 6 set on the back of the membrane blows high-speed negative ion air into the membrane body, which stimulates the membrane body to resonate aerodynamically and causes the floating beads to detach from the membrane surface and fall back into the bead groove. The reflective film 7 enters the pressure roller assembly, where the active roller 9 and the driven roller 10 work together to roll-press and solidify the glass microspheres on the film surface, thereby improving the bonding strength between the microspheres and the film material. The vacuum adsorption component adsorbs and removes the floating beads remaining on the film surface to ensure the film surface is flat; after the beads are planted, the reflective film 7 enters the drying tunnel for heat treatment and curing.

[0043] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0044] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A retroreflective film beading apparatus characterized by, The device includes a frame (1), a roller assembly (2), a bead assembly (3), and a drive assembly (4) mounted on the frame (1). The roller assembly (2) includes at least a heating roller, which is used to drive the reflective film (7) to move and heat it. The bead assembly (3) includes a bead groove and a support plate for carrying glass microspheres, which is disposed in the bead groove. The drive assembly (4) is connected to the bead assembly (3) and is used to drive the bead groove to approach the heating roller, so that the glass microspheres in the bead groove are in contact with the reflective film (7) on the surface of the heating roller.

2. The bead placement apparatus of claim 1, wherein The support plate has multiple air inlets with a diameter smaller than that of the glass microspheres. The bottom of the bead distribution groove has multiple partitions (12) forming multiple air chambers (13) at the bottom of the bead distribution groove to separate airflow channels. The support plate is laid flat on top of the partitions (12).

3. The bead placement apparatus of claim 2, wherein The bead assembly (3) also includes a plurality of air inlet pipes (5) disposed at the bottom of the bead groove. The plurality of air inlet pipes (5) are arranged in sequence along the radial direction of the bead groove and are respectively connected to the plurality of air chambers (13). The plurality of air inlet pipes (5) are used to obtain an air source and inject dry negative ion air into the bead groove, and to spray the negative ion air upward through the air inlet hole via the air chamber (13).

4. The bead placement apparatus of claim 1 wherein, The bead-planting device also includes a floating bead removal component, which includes at least one air blowing pipe (6). One end of the air blowing pipe (6) passes through the frame (1) and is bent toward the non-bead surface of the reflective film (7) to obtain an air source and blow negative ion air onto the non-bead surface of the reflective film (7) so that the surface of the reflective film (7) generates aerodynamic resonance.

5. The bead placement apparatus of claim 1 wherein, The bead-planting device also includes a pressure roller assembly, which includes an active roller (9) and a driven roller (10). The active roller (9) and the driven roller (10) are arranged opposite to each other and form a rolling area between them, which is used to roll the reflective film (7) after the beading is completed.

6. The bead placement apparatus of claim 5, wherein, The active roller (9) is made of steel and is used to press the beaded surface of the reflective film (7), while the driven roller (10) is made of rubber and is used to press the non-beaded surface of the reflective film (7).

7. The bead placement apparatus of claim 6, wherein the bead placement apparatus further comprises a bead placement guide. The pressure roller assembly also includes a plurality of guide rollers (11), which are respectively disposed at the feed end and / or discharge end of the active roller (9) and the driven roller (10) to guide the reflective film (7) after the beading is completed to enter or leave the rolling area between the active roller (9) and the driven roller (10) along a predetermined path.

8. The bead placement apparatus of claim 1 wherein, The bead-planting device also includes a vacuum adsorption component, which includes a vacuum negative pressure pump and an adsorption tube (8) connected to the vacuum negative pressure pump. The adsorption tube (8) is used to adsorb the floating beads on the reflective film (7) by the negative pressure suction generated by the vacuum negative pressure pump.

9. The bead placement apparatus of claim 8, wherein, The adsorption tube (8) has an adsorption groove formed on the bead surface of the reflective film (7). The adsorption groove is used to concentrate the negative pressure suction force generated by the vacuum negative pressure pump onto the bead surface, so that the floating beads on the bead surface are adsorbed into the interior of the adsorption tube (8).

10. A retroreflective film production apparatus characterized by comprising: Includes a drying tunnel and a reflective film beading device as described in any one of claims 1 to 9, wherein the drying tunnel is located downstream of the reflective film (7) beading device and is used to perform heat treatment on the reflective film (7) after the beading and rolling processes are completed.

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