A production device suitable for the mixed bead process

Abstract

The present invention discloses a production device suitable for the mixed bead process, which includes a material storage component, a glue coating component, a material conveying pipe, an anti-static component, a sedimentation component, and a light curing component. The material storage component is successively provided with a stirring motor, a vacuum component, a stirring cylinder body, a stirring rod, and an ultrasonic vibration ring from top to bottom. The stirring motor and the vacuum component are arranged above the stirring cylinder body. The stirring rod is arranged inside the stirring cylinder body and passes through the stirring cylinder body to be connected with the stirring motor. The ultrasonic vibration ring is arranged inside the stirring cylinder body. One end of the material conveying pipe is connected to the bottom of the stirring cylinder body, and the other end of the material conveying pipe is connected to the glue coating component. The upper surface of the anti-static component is coplanar with the upper surface of the sedimentation component. The production device for the mixed bead process with the above structure can overcome the defects of unstable mixed bead and coating processes and difficult air bubble discharge in the prior art, so as to finally obtain a glass bead type reflective film with good reflective effect and stable quality, which is beneficial to improving the yield of mass production.

Description

Technical Field

[0001] The present invention relates to glass bead sedimentation equipment, and particularly to a production device suitable for the bead mixing process. Background Art

[0002] Traditional glass bead type reflective films generally consist of five layers: a surface layer, a glass bead layer, a focusing layer, a metal reflective layer, and an adhesive layer. Each layer is coated and laminated after the previous process, and the manufacturing process is cumbersome and complex. In order to improve production efficiency and reduce production costs, the manufacturing process of existing glass bead type reflective films has been improved and upgraded. The glass bead layer and the focusing layer are directly formed by a bead mixing process, that is, the glass beads and the resin are directly mixed and then coated in one step. This process simplifies the interlayer structure of traditional glass bead type reflective films, greatly improves the production efficiency of reflective films, and reduces production costs.

[0003] However, many technical problems have also emerged in the process of producing glass bead type reflective films using the bead mixing process. For example, during the coating production process, there are problems such as the storage stability of the mixed liquid. Since the specific gravity of the glass beads in the mixed liquid is much higher than that of the resin, the glass beads with a greater specific gravity are prone to precipitation and stratification with the resin, resulting in the mixed liquid becoming an unstable suspension. Eventually, the number of glass beads per unit area of the coated product varies greatly, resulting in poor product consistency and more prone to defective products such as powder lines and mottles, ultimately affecting the performance of the product and the quality stability of mass production.

[0004] In addition, after the mixed liquid is coated by a doctor blade of the coating equipment into a wet coating with a certain thickness, since the wet coating contains bubbles and the coating is relatively thick, it is difficult to remove the bubbles in the coating. The accumulated bubbles in the coating will eventually cause bubble point defects in the product, which will also affect the retroreflective performance of the product. At the same time, the glass beads in the unit vertical section of the wet coating are randomly distributed in the mixed liquid. If the glass beads at different heights cannot settle to the same horizontal plane or more than 90% of the glass beads cannot settle to the same horizontal plane, the incident light cannot be well focused on one plane, resulting in the retroreflective performance of the final product not meeting the national regulatory requirements, and thus the product cannot be mass-produced and sold.

[0005] In view of the above problems, it is still necessary to develop a production device for the bead mixing process to solve the coating problem of retroreflective films. Summary of the Invention

[0006] The present invention provides a new production device suitable for the bead mixing process in view of the defects in the prior art, such as unstable bead mixing and coating processes, difficult bubble removal, which affect the consistency and quality stability of glass bead type reflective films.

[0007] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] A production device suitable for the mixed bead process, including a material storage component, a glue coating component, and further including a feeding pipe, an anti-static component, a sedimentation component, and a light curing component. The material storage component, the feeding pipe, the glue coating component, the anti-static component, the sedimentation component, and the light curing component are arranged in sequence from left to right. The material storage component is sequentially provided with a stirring motor, a vacuum component, a stirring cylinder body, a stirring rod, and an ultrasonic vibration ring from top to bottom. The stirring motor and the vacuum component are arranged above the stirring cylinder body. The stirring rod is arranged in the stirring cylinder body and passes through the stirring cylinder body to be connected with the stirring motor. The ultrasonic vibration ring is arranged in the stirring cylinder body. One end of the feeding pipe is connected to the bottom of the stirring cylinder body, and the other end of the feeding pipe is connected to the glue coating component. The upper surface of the anti-static component is coplanar with the upper surface of the sedimentation component.

[0009] In the production device of the above mixed bead process, the material storage component is used for stirring and storing the resin mixture. By combining the stirring rod with the ultrasonic vibration ring and the vacuum component, the resin mixture can be simultaneously stirred, evacuated, and ultrasonically vibrated, effectively discharging the bubbles in the resin mixture and making the resins and glass microspheres with different specific gravities in the resin mixture evenly dispersed. The evenly dispersed mixture flows out through the feeding pipe to the glue coating component, and the glue coating component can coat a uniform wet coating with a certain thickness. The sedimentation component is used to quickly sediment the glass microspheres in the resin mixture, thereby enhancing the light focusing effect of the final product and enhancing the reflective performance. At the same time, vibrations at a certain frequency will further remove the tiny bubble points in the wet coating. The anti-static component is used to remove the static electricity of the wet coating, thereby avoiding the attachment of other impurities on the surface of the wet coating, eliminating the influence of other impurities on the product, and also avoiding the phenomenon that the glass microspheres in the wet coating agglomerate and disperse unevenly due to static electricity. The light curing component is used to fully cure and form the wet coating, having the advantages of high forming efficiency, stable production quality, and mature and stable process.

[0010] The production device of the mixed bead process adopting the above structure can overcome the defects of unstable mixed bead and coating processes and difficult bubble discharge in the prior art, and finally obtain a glass microsphere type reflective film with good reflective effect and stable quality, which is beneficial to improving the yield rate of mass production.

[0011] Preferably, the above-mentioned production device suitable for the mixed bead process further includes a screw component. The screw component penetrates into the feeding pipe. The feeding pipe is a three-way shunt pipe, and a rotary valve is arranged on the upper part of the feeding pipe.

[0012] The three-part flow divider can output the resin mixture more evenly to the gluing assembly. The screw assembly plays the role of stirring again and preventing precipitation and stratification. At the same time, the screw assembly is in a closed space, and air can be isolated during the process of transporting the mixture. Controlling the rotation speed of the screw assembly to adjust the output flow of the resin mixture is beneficial to obtaining a coating with a uniform thickness. Under low pressure or negative pressure, the rotary valve can quickly input the materials in the stirring cylinder into the feeding pipe, improving the feeding efficiency and reducing the entry of air bubbles into the mixture.

[0013] Preferably, for a production device suitable for the mixed bead process described above, the gluing assembly includes a fixed frame, a glue tray, a transmission roller assembly, and a comma knife. The glue tray and the transmission roller assembly are fixed on the fixed frame. One end of the glue tray is connected to the outlet of the feeding pipe. The other end of the glue tray is provided with at least 2 stirring screw rollers and is matched with the transmission roller assembly. The comma knife is arranged above the transmission roller assembly.

[0014] The stirring screw rollers play the role of stirring again and preventing precipitation and stratification, making the coating more uniform. The comma knife can more accurately control the thickness of the coating.

[0015] Preferably, for a production device suitable for the mixed bead process described above, the gluing assembly further includes a lifting device. One end of the lifting device is fixed on the fixed frame, and the other end of the lifting device is connected to the comma knife.

[0016] The lifting device adjusts the thickness of the coating by changing the distance between the comma knife and the transmission roller assembly, thereby meeting the actual requirements of various thickness coatings proposed by customers and making the applicability of the present invention wider.

[0017] Preferably, for a production device suitable for the mixed bead process described above, the stirring screw rollers are arranged in parallel, and the rotation directions of adjacent stirring screw rollers are opposite. The rotation speed of the stirring screw rollers is 1 - 300 revolutions per minute.

[0018] The stirring screw rollers with opposite rotation directions can make the resin mixture mix more evenly, ensuring the uniformity of the resin mixture in the glue tray before coating, and thus making the coating thickness more consistent.

[0019] Preferably, for a production device suitable for the mixed bead process described above, the sedimentation assembly includes a pneumatic turbine vibrator and a vibration roller. The pneumatic turbine vibrator is arranged at both ends of the vibration roller. There are at least 2 vibration rollers. The vibration frequency of the pneumatic turbine vibrator is 3000 - 45000 times per minute.

[0020] Adopt the structure of cooperating with a pneumatic turbine vibrator and a vibrating roller. Adjust the vibration amplitude by adjusting the frequency of the pneumatic turbine vibrator, so that the vibrating roller generates resonance. Since the vibrating roller is in direct contact with the film, the vibrating roller can accelerate the sedimentation of glass beads in the resin mixture.

[0021] Preferably, for a production device suitable for the bead mixing process described above, the stirring cylinder body includes an outer cylinder and an inner cylinder. A water medium cavity is formed between the outer cylinder and the inner cylinder, and the ultrasonic vibration ring is arranged in the water medium cavity.

[0022] The water medium cavity can enhance the vibration effect of the ultrasonic vibration ring, accelerate the discharge of air bubbles from the resin mixture, and improve the dispersion uniformity of the resin mixture.

[0023] Preferably, for a production device suitable for the bead mixing process described above, the vacuum assembly includes a vacuum pump and a vacuum gauge, and the vacuum pump and the vacuum gauge are installed on the upper surface of the stirring cylinder body.

[0024] The vacuum gauge is used to display the vacuum degree in the stirring cylinder body, which is convenient for accurately controlling the vacuum degree in the stirring cylinder body.

[0025] Preferably, for a production device suitable for the bead mixing process described above, the light curing assembly is at least 3 groups of UV lamp boxes, and the irradiance of the UV lamp boxes is 500 - 10000 mj / cm 2 , and the light wavelength is 290 - 320 nm.

[0026] Use the light signal of the UV lamp box to control the curing degree of the coating, so as to better control the sedimentation position of the glass beads. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structure of the present invention Figure 1 ;

[0028] Figure 2 It is a schematic structure of the present invention Figure 2 ;

[0029] Figure 3 It is a schematic structural diagram of the storage component and the feeding pipe in the present invention;

[0030] Figure 4 It is a schematic structural diagram of the glue tray and the stirring screw roller in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following further describes the present invention in detail in conjunction with the attached Figures 1-4 drawings and specific embodiments, but they are not limitations to the present invention:

[0032] Embodiment 1

[0033] A production device suitable for the mixed bead process, comprising a material storage component 1, a glue coating component 3, and further comprising a material conveying pipe 2, an anti-static component 4, a sedimentation component 5, and a light curing component 6. The material storage component 1, the material conveying pipe 2, the glue coating component 3, the anti-static component 4, the sedimentation component 5, and the light curing component 6 are arranged in sequence from left to right. The material storage component 1 is successively provided with a stirring motor 11, a vacuum component 12, a stirring cylinder 13, a stirring rod 14, and an ultrasonic vibration ring 15 from top to bottom. The stirring motor 11 and the vacuum component 12 are arranged above the stirring cylinder 13. The stirring rod 14 is arranged inside the stirring cylinder 13 and passes through the stirring cylinder 13 to be connected with the stirring motor 11. The ultrasonic vibration ring 15 is arranged inside the stirring cylinder 13. One end of the material conveying pipe 2 is connected to the bottom of the stirring cylinder 13, and the other end of the material conveying pipe 2 is connected to the glue coating component 3. The upper surface of the anti-static component 4 is coplanar with the upper surface of the sedimentation component 5.

[0034] When operating the production device for the mixed bead process, pour the resin mixture into the material storage component 1, then seal it and start to evacuate. After reaching a certain vacuum degree, start the stirring motor 11, and start the ultrasonic vibration ring 15 while stirring. After fully discharging the bubbles, a uniformly dispersed resin mixture is prepared.

[0035] Take a PET film and load it onto the glue coating component 3 as the surface layer. Flow the resin mixture through the material conveying pipe 2 into the glue coating component 3. The glue coating component 3 coats the resin mixture on the PET film, then removes static electricity through the anti-static component 4. Then the sedimentation component 5 uses a vibrating form to quickly sediment the glass microspheres in the resin mixture into the coating. Then, it is irradiated by the light curing component 6 for light curing. After curing, a reflective coating with uniform thickness is prepared.

[0036] Preferably, it further comprises a screw component 21. The screw component 21 penetrates into the material conveying pipe 2. The material conveying pipe 2 is a three-way shunt pipe, and a rotary valve 22 is arranged on the upper part of the material conveying pipe 2.

[0037] Preferably, the glue coating component 3 comprises a fixing frame 31, a glue pan 32, a transmission roller assembly 33, and a comma knife 34. The glue pan 32 and the transmission roller assembly 33 are fixed on the fixing frame 31. One end of the glue pan 32 is connected to the outlet of the material conveying pipe 2. The other end of the glue pan 32 is provided with at least 2 stirring screw rollers 35 and is matched with the transmission roller assembly 33. The comma knife 34 is arranged above the transmission roller assembly 33.

[0038] Preferably, the glue coating component 3 further comprises a lifting device 36. One end of the lifting device 36 is fixed on the fixing frame 31, and the other end of the lifting device 36 is connected to the comma knife 34.

[0039] Preferably, the stirring screw rollers 35 are arranged in parallel, and the rotation directions of adjacent stirring screw rollers 35 are opposite. The rotation speed of the stirring screw rollers 35 is 1 to 300 revolutions per minute.

[0040] Preferably, the sedimentation assembly 5 includes a pneumatic turbine vibrator 51 and vibrating rollers 52. The pneumatic turbine vibrator 51 is arranged at both ends of the vibrating rollers 52. There are no less than 2 vibrating rollers 52. The vibration frequency of the pneumatic turbine vibrator 51 is 3000 to 45000 times per minute.

[0041] Preferably, the stirring cylinder 13 includes an outer cylinder 131 and an inner cylinder 132. A water medium cavity is formed between the outer cylinder 131 and the inner cylinder 132. The ultrasonic vibration ring 15 is arranged in the water medium cavity.

[0042] Preferably, the vacuum assembly 12 includes a vacuum pump 121 and a vacuum gauge 122. The vacuum pump 121 and the vacuum gauge 122 are installed on the upper surface of the stirring cylinder 13.

[0043] Preferably, the light curing assembly 6 is no less than 3 groups of UV light boxes 61. The irradiance of the UV light boxes 61 is 500 to 10000 mj / cm 2 and the light wavelength is 290 to 320 nm.

[0044] When operating the production device for the bead mixing process, pour the resin mixture into the storage assembly 1, then seal it and start evacuating. After reaching a vacuum degree less than 0.1 MPa, start the stirring motor 11. Control the stirring speed at 50 to 300 revolutions per minute and stir for 5 to 15 minutes. While stirring, start the ultrasonic vibration ring 15. After fully discharging the bubbles, a uniform resin mixture is obtained, with a viscosity of 800 to 1500 cps / 25 °C.

[0045] Put a PET film on the coating assembly 3 as the surface layer. Open the rotary valve 22. After the resin mixture is stirred again by the screw assembly 21, it flows onto the glue tray 32. After being stirred again by the stirring screw rollers 35, the resin mixture is coated on the PET film through the transmission roller assembly 33 and the comma doctor blade 34. Control the coating thickness at 45 to 100 μm to obtain a wet coating; then remove the static electricity through the static elimination assembly 4, and then the pneumatic turbine vibrator 51 and the vibrating rollers 52 resonate. Set the vibration frequency of the pneumatic turbine vibrator 51 at 3000 to 45000 times per minute to quickly sediment the glass microspheres in the resin mixture into the coating. Then, irradiate it with the UV light box 61 for light curing. After the curing is completed, a reflective coating with uniform thickness is obtained.

[0046] In summary, the above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the patent application of the present invention shall fall within the scope covered by the present invention.

Claims

1. A production device suitable for the mixed bead process, comprising a material storage component (1) and a glue coating component (3), characterized in that: It also includes a feeding pipe (2), an anti-static component (4), a sedimentation component (5), and a light-curing component (6). The storage component (1), the feeding pipe (2), the glue application component (3), the anti-static component (4), the sedimentation component (5), and the light-curing component (6) are arranged in sequence from left to right. The storage component (1) is successively provided with a stirring motor (11), a vacuum component (12), a stirring cylinder (13), a stirring rod (14), and an ultrasonic vibration ring (15) from top to bottom. The stirring motor (11) and the vacuum component (12) are arranged above the stirring cylinder (13). The stirring rod (14) is arranged inside the stirring cylinder (13) and passes through the stirring cylinder (13) to be connected with the stirring motor (11). The ultrasonic vibration ring (15) is arranged inside the stirring cylinder (13). One end of the feeding pipe (2) is connected to the bottom of the stirring cylinder (13), and the other end of the feeding pipe (2) is connected to the glue application component (3). The upper surface of the anti-static component (4) is coplanar with the upper surface of the sedimentation component (5); It also includes a screw component (21). The screw component (21) penetrates into the feeding pipe (2). The feeding pipe (2) is a three-part split pipe, and a rotary valve (22) is arranged on the upper part of the feeding pipe (2); The glue application component (3) includes a fixed frame (31), a glue tray (32), a transmission roller assembly (33), and a comma scraper (34). The glue tray (32) and the transmission roller assembly (33) are fixed on the fixed frame (31). One end of the glue tray (32) is connected to the outlet of the feeding pipe (2). The other end of the glue tray (32) is provided with no less than 2 stirring screw rollers (35) and is matched with the transmission roller assembly (33). The comma scraper (34) is arranged above the transmission roller assembly (33); The stirring screw rollers (35) are arranged in parallel, and the rotation directions of adjacent stirring screw rollers (35) are opposite. The rotation speed of the stirring screw rollers (35) is 1 - 300 revolutions per minute; The stirring cylinder (13) includes an outer cylinder (131) and an inner cylinder (132). A water medium cavity is formed between the outer cylinder (131) and the inner cylinder (132). The ultrasonic vibration ring (15) is arranged in the water medium cavity.

2. The production device suitable for the mixed bead process according to claim 1, characterized in that: The glue application component (3) also includes a lifting device (36). One end of the lifting device (36) is fixed on the fixed frame (31), and the other end of the lifting device (36) is connected to the comma scraper (34).

3. A production device suitable for the mixed bead process according to claim 1, characterized in that: The sedimentation component (5) includes a pneumatic turbine vibrator (51) and vibration rollers (52). The pneumatic turbine vibrator (51) is arranged at both ends of the vibration rollers (52). The number of vibration rollers (52) is no less than 2. The vibration frequency of the pneumatic turbine vibrator (51) is 3000 - 45000 times per minute.

4. A production device suitable for the mixed bead process according to claim 1, characterized in that: The vacuum assembly (12) includes a vacuum pump (121) and a vacuum gauge (122), and the vacuum pump (121) and the vacuum gauge (122) are installed on the upper surface of the stirring cylinder body (13).

5. The production device suitable for the mixed bead process according to claim 1, wherein: The light-curing component (6) is at least 3 groups of UV light boxes (61), and the irradiance of the UV light box (61) is 500~10000 mj / cm 2 , and the light wavelength is 290~320 nm.

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