A high-precision electrostatic adsorption type Mylar film bonding device

Abstract

This utility model provides a high-precision electrostatic adsorption type Mylar film bonding device, belonging to the technical field of Mylar film bonding equipment. It includes a Mylar film conveyor frame, a lower component conveyor frame, and a roller. The lower component conveyor frame is located below the Mylar film conveyor frame, and a roller is located above the tail of the lower component conveyor frame. A rotating central drive shaft is arranged in a spaced array on the Mylar film conveyor frame. Side conveyor belts are rotatably connected to both ends of the central drive shaft with tension. A central conveyor roller is fixedly connected to the middle of the central drive shaft. An upper guide plate is fixedly connected to the upper side of the tail of the Mylar film conveyor frame. By decomposing the conveying function into a combination of narrow conveyor belts (width ≤ 300mm) on both sides and a central support roller, the non-linear cost increase problem of wide conveyor belts (≥ 1m) is avoided. This solves the problem of high equipment investment where, with the increase in Mylar film size, the unit length cost increases by 1.5-2 times for every 1m increase in conveyor belt width.

Description

Technical Field

[0001] This utility model relates to the technical field of Mylar film bonding equipment, and in particular to a high-precision electrostatic adsorption Mylar film bonding device. Background Technology

[0002] Electrostatic adsorption Mylar film is a polyester film product that achieves adhesive-free bonding based on the principle of electrostatic adsorption. Electrostatic adsorption Mylar film is pre-treated with electrostatics to give its surface a stable static charge, so it does not rely on adhesives and can be adsorbed and bonded to the surface of conductors, semiconductors or polar materials by electrostatic attraction alone.

[0003] Electrostatic adsorption Mylar film is commonly used for surface bonding of screens. With the increasing popularity of large-size displays, electrostatic adsorption Mylar film needs to meet the bonding requirements of large-size screens. Mylar film is transported by belt. As the size of Mylar film increases, the width of the conveyor belt also needs to be increased. For every 1m increase in the width of the conveyor belt, the cost per unit length increases by 1.5-2 times. In addition, special wide-width conveyor equipment is required, resulting in high equipment investment and higher installation and maintenance costs for wide conveyor belts. Utility Model Content

[0004] This invention provides a high-precision electrostatic adsorption Mylar film bonding device. By decomposing the conveying function into a combination of two narrow conveyor belts (width ≤ 300mm) and a central support roller, it avoids the non-linear cost increase problem of wide conveyor belts (≥ 1m). According to industry data, the unit length cost increases by 1.5-2 times for every 1m increase in conveyor belt width. In this design, the total material cost of the two narrow belts is 40% to 50% lower than that of a single wide belt of the same specification.

[0005] This utility model provides a high-precision electrostatic adsorption type Mylar film bonding device, specifically including a Mylar film conveyor frame, a lower component conveyor frame, and a roller. The lower component conveyor frame is arranged below the Mylar film conveyor frame, and the roller is arranged above the tail of the lower component conveyor frame. Rotating central drive shafts are arranged in an array at intervals on the Mylar film conveyor frame. Both ends of the central drive shaft are tensioned and rotatably connected to side conveyor belts. A central conveyor roller is fixedly connected to the middle of the central drive shaft. The central drive shaft moves the side conveyor belts through friction. One of the central drive shafts is driven by a motor. The central drive shaft and the other central drive shafts rotate synchronously through chain transmission. An upper guide plate is fixedly connected to the upper side of the tail of the Mylar film conveyor frame, and a tail guide roller is rotatably connected to the lower side of the tail of the Mylar film conveyor frame. The central drive shaft and the tail guide roller rotate synchronously through chain transmission. The friction coefficient between the central drive shaft and the side conveyor belt is ≥0.3, ensuring a transmission slippage rate ≤0.1%.

[0006] Furthermore, the top surfaces of the middle conveyor roller and the side conveyor belt are at the same height, the tail guide roller is below the upper guide plate, the tail guide roller is above the lower component conveyor frame, and the middle conveyor roller supports and conveys the middle part of the Mylar film.

[0007] Furthermore, the upper part of the lower component conveying frame is provided with rotating lower component conveying rollers arranged in a spaced array. One of the lower component conveying rollers is driven to rotate by a motor. The lower component conveying rollers and the other lower component conveying rollers are synchronously rotated by a chain. The surface of the lower component conveying rollers is provided with an anti-static coating. An electrostatic generator is fixedly connected to the upper part of the lower component conveying frame. The output voltage of the electrostatic generator is adjustable from 5 to 30 kV. The electrostatic generator is equipped with an electrostatic bar installed above the Mylar film conveying path. When the Mylar film passes under the electrostatic generator, the surface charge density reaches 5-10 μC / m², realizing electrostatic adsorption pretreatment. The electrostatic action area of ​​the electrostatic generator is 100-200 mm in length. Side connecting slides and side connecting slide rods are fixedly connected to both sides of the rear part of the lower component conveying frame.

[0008] Furthermore, the electrostatic generator is located downstream of the upper guide plate, and the side connecting slide and the side connecting slide rod are both located downstream of the electrostatic generator.

[0009] Furthermore, both sides of the rolling roller are rotatably connected to a lower connecting slide, and the upper part of the lower connecting slide is fixedly connected to an upper support spring. The rolling roller is a Φ50mm silicone roller, the upper support spring is a compression spring, the upper end of the upper support spring is fixedly connected to the upper connecting slide, and the top of the upper connecting slide is rotatably connected to an upper threaded rod.

[0010] Furthermore, the lower connecting slide and the upper connecting slide are slidably connected along the vertical slide rail of the side connecting slide, and the first end of the lower connecting slide and the side connecting slide are axially slidably connected, so as to adjust the support force of the upper support spring on the rolling roller and adjust the downward pressure of the rolling roller on the screen component and the Mylar film.

[0011] Furthermore, the upper threaded rod and the upper connecting slide are threaded together, the upper threaded rod is threaded to the top of the side connecting slide, and the lower end is rotatably connected to the upper connecting slide. Rotating the upper threaded rod can adjust the height of the upper connecting slide, and then the pressure of the roller on the Mylar sheet can be adjusted by the upper support spring. The roller is located above the lower component conveying frame and the lower component conveying roller. The upper support spring supports the roller to press down on the Mylar sheet attached to the screen component conveyed on the top of the lower component conveying roller.

[0012] This invention provides a high-precision electrostatic adsorption type Mylar film bonding device, which has the following beneficial effects:

[0013] The side conveyor belts on both sides of the Mylar sheet conveyor frame transport the Mylar sheets, while the central conveyor roller supports and transports the Mylar sheets in the middle. By decomposing the conveying function into a combination of narrow conveyor belts (width ≤ 300mm) on both sides and the central support roller, the non-linear cost increase problem of wide conveyor belts (≥ 1m) is avoided. According to industry data, the unit cost increases by 1.5-2 times for every 1m increase in conveyor belt width. However, the total material cost of the double-sided narrow belts in this design is 40% to 50% lower than that of the same specification overall wide belt. This eliminates the higher installation and maintenance costs associated with wide conveyor belts. The installation and replacement of the narrow side conveyor belts do not require large hoisting tools, and the maintenance time per person is short.

[0014] The central conveyor roller provides rigid support to the middle of the Mylar film, and in conjunction with the synchronous transmission of the side conveyor belts on both sides, the flatness deviation of the Mylar film during the conveying process is controlled within 0.1mm / m. The offset of the wider belt caused by uneven tension (≥0.5mm / m) is significantly improved, laying the foundation for subsequent high-precision bonding.

[0015] The upper support spring supports the rolling roller to roll and vent the bonded Mylar sheet. By moving the upper connecting slide to compress or expand the upper support spring, the support force of the upper support spring on the rolling roller can be adjusted, thereby adjusting the downward pressure of the rolling roller on the screen components and Mylar sheet to meet the pressure requirements of Mylar sheets of different thicknesses. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0017] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0018] In the attached diagram:

[0019] Figure 1 A schematic diagram of the overall structure of this application is shown;

[0020] Figure 2 A schematic diagram of the tail guide roller structure of this application is shown;

[0021] Figure 3 A schematic diagram of the lower component conveyor structure of this application is shown;

[0022] Figure 4 A schematic diagram of the roller structure of this application is shown;

[0023] Figure 5 A schematic diagram of the side conveyor belt of this application is shown;

[0024] Figure 6This invention provides a schematic diagram of the Mylar film conveyor, the lower component conveyor, and the rolling roller in their separated states.

[0025] Figure label:

[0026] 1. Mylar film conveyor frame; 101. Central drive shaft; 102. Side conveyor belt; 103. Central conveyor roller; 104. Tail guide roller; 105. Upper guide plate;

[0027] 2. Lower component conveyor frame; 201. Lower component conveyor roller; 202. Electrostatic generator; 203. Side connecting slide; 204. Side connecting slide bar;

[0028] 3. Roller roller; 301. Lower connecting slide; 302. Upper support spring; 303. Upper connecting slide; 304. Upper threaded rod. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Example 1: Please refer to Figures 1 to 6 :

[0031] This invention proposes a high-precision electrostatic adsorption type Mylar film bonding device, including a Mylar film conveying frame 1, a lower component conveying frame 2, and a rolling roller 3. The Mylar film conveying frame 1 has rotating central drive shafts 101 arranged in a spaced array. Both ends of the central drive shafts 101 are tensioned and rotatably connected to side conveyor belts 102. A central conveyor roller 103 is fixedly connected to the middle of the central drive shafts 101. The central drive shafts 101 move via frictional transmission through the side conveyor belts 102. One of the central drive shafts 101 is driven by a motor. The central drive shafts 101 and the others rotate synchronously via chain transmission. An upper guide plate 105 is fixedly connected to the upper side of the tail of the mylar film conveyor frame 1, and a tail guide roller 104 is rotatably connected to the lower side of the tail of the mylar film conveyor frame 1. The middle drive shaft 101 and the tail guide roller 104 achieve synchronous rotation through chain drive. The friction coefficient between the middle drive shaft 101 and the side conveyor belt 102 is ≥0.3, ensuring that the transmission slippage rate is ≤0.1%. A lower component conveyor frame 2 is set below the mylar film conveyor frame 1. Rotating lower component conveyor rollers 201 are arranged in a spaced array on the upper part of the lower component conveyor frame 2. One of the lower component conveyor rollers 201 is driven to rotate by a motor. The lower component conveyor rollers 201 and the others are rotated by a motor. The component conveyor rollers 201 rotate synchronously via a chain. The surface of the lower component conveyor roller 201 is coated with an anti-static coating. An electrostatic generator 202 is fixedly connected to the upper part of the lower component conveyor frame 2. The output voltage of the electrostatic generator 202 is adjustable from 5-30kV. The electrostatic generator 202 is equipped with an electrostatic bar installed above the Mylar film conveying path. When the Mylar film passes under the electrostatic generator 202, the surface charge density reaches 5-10μC / m², achieving electrostatic adsorption pretreatment. The electrostatic action zone of the electrostatic generator 202 is 100-200mm long. Side connecting carriages 203 are fixedly connected to both sides of the rear of the lower component conveyor frame 2. The side connecting slide 204 and the electrostatic generator 202 are located downstream of the upper guide plate 105. The side connecting slide 203 and the side connecting slide 204 are both located downstream of the electrostatic generator 202. A rolling roller 3 is provided above the tail of the lower component conveyor 2. The lower connecting slide 3 is rotatably connected to both sides of the rolling roller 3. An upper support spring 302 is fixedly connected to the upper part of the lower connecting slide 301. The rolling roller 3 is a Φ50mm silicone roller. The upper support spring 302 is a compression spring. The upper end of the upper support spring 302 is fixedly connected to the upper connecting slide 303. An upper threaded rod 304 is rotatably connected to the top of the upper connecting slide 303.

[0032] In this embodiment, the top surfaces of the middle conveyor roller 103 and the side conveyor belt 102 are at the same height. The tail guide roller 104 is located below the upper guide plate 105 and above the lower component conveyor frame 2. The middle conveyor roller 103 supports and conveys the middle part of the Mylar film. By decomposing the conveying function into a combination of narrow conveyor belts with a width of ≤300mm on both sides and the middle support roller, the nonlinear cost increase problem of wide conveyor belts ≥1m is avoided.

[0033] In this embodiment, the lower connecting slide 301 and the upper connecting slide 303 are slidably connected along the vertical slide rail of the side connecting slide 203. The head end of the lower connecting slide 301 and the side connecting slide rod 204 are axially slidably connected, so as to realize the adjustment of the support force of the upper support spring 302 on the rolling roller 3, and the adjustment of the downward pressure of the rolling roller 3 on the screen component and the Mylar film, so as to meet the pressure requirements of Mylar films of different thicknesses.

[0034] In this embodiment, the upper threaded rod 304 and the upper connecting slide 303 are threadedly connected. The upper threaded rod 304 is threadedly connected to the top of the side connecting slide 203, and its lower end is rotatably connected to the upper connecting slide 303. Rotating the upper threaded rod 304 can adjust the height of the upper connecting slide 303, thereby adjusting the pressure of the roller 3 on the Mylar sheet through the upper support spring 302. The roller 3 is located above the lower component conveying frame 2 and the lower component conveying roller 201. The upper support spring 302 supports the roller 3 to press down the Mylar sheet attached to the screen component conveyed on the top of the lower component conveying roller 201, reducing bubbles and wrinkles in the Mylar sheet.

[0035] In this second embodiment, based on the first embodiment, visual recognition structures or infrared position recognition mechanisms are installed on the sides of the Mylar film conveyor 1 and the lower component conveyor 2. These structures identify the position of the Mylar film at the top of the Mylar film conveyor 1 and the position of the screen component at the top of the lower component conveyor 2, enabling synchronous movement of the Mylar film at the top of the Mylar film conveyor 1 and the screen component at the top of the lower component conveyor 2. This ensures alignment and fit between the Mylar film at the top of the Mylar film conveyor 1 and the screen component at the top of the lower component conveyor 2, preventing misalignment due to different spacing and reducing the requirements for the spacing between the Mylar film and the screen component. The visual recognition or infrared position recognition mechanism detects the spacing deviation between the Mylar film and the screen component in real time and compensates for the spacing by adjusting the motor speed of the Mylar film conveyor 1, ensuring precise alignment. The Mylar film at the top of the Mylar film conveyor 1 falls precisely onto the screen component at the top of the lower component conveyor 2.

[0036] The working principle of this embodiment is as follows: The Mylar film conveyor frame 1 drives the side conveyor belt 102 and the middle conveyor roller 103 to rotate synchronously through the central drive shaft 101. The Mylar film is supported by the tail guide roller 104 and guided by the upper guide plate 105, and is conveyed to the screen component above the lower component conveyor frame 2. The lower component conveyor frame 2 conveys the screen component through the rotation of the lower component conveyor roller 201. The Mylar film moves downward and adheres to the surface of the screen component at the top of the lower component conveyor frame 2. Then, the Mylar film and the screen component enter together below the electrostatic bar of the electrostatic generator 202. Under the action of a 5-30kV electric field, the surface of the Mylar film becomes charged. After being charged, the Mylar film and the screen component are adhered. The Mylar film can be adhered and then charged, or the electrostatic generator 202 can be fixed inside the upper guide plate 105 to achieve the Mylar film being charged first and then adhered. Then, the upper support spring 302 supports the rolling. Roller 3 rolls and vents the Mylar sheet after bonding; the upper threaded rod 304 moves axially along the top thread of the side connecting slide 203, and drives the upper connecting slide 303 to rise and fall synchronously. The movement of the upper connecting slide 303 compresses or expands the upper support spring 302, thereby adjusting the support force of the upper support spring 302 on the rolling roller 3, and adjusting the pressure of the rolling roller 3 on the screen components and Mylar sheet. The rolling pressure can be continuously adjusted in the range of 50 to 200N to meet the pressure requirements of Mylar sheets of different thicknesses. For Mylar sheets of different thicknesses of 0.1 to 0.5mm, the optimal rolling parameters can be matched. For example, 80N pressure is used for 0.1mm thin Mylar sheets and 150N pressure is used for 0.5mm thick Mylar sheets. This solves the problem that traditional fixed pressure rollers are easy to damage thin parts and do not completely vent thick parts, significantly enhancing the economy and process adaptability of the device.

[0037] The side conveyor belts 102 on both sides of the Mylar sheet conveyor frame 1 transport the Mylar sheets, while the central conveyor roller 103 supports and transports the Mylar sheets in the middle. By decomposing the conveying function into a combination of narrow conveyor belts ≤300mm wide on both sides and the central support roller, the non-linear cost increase problem of wide conveyor belts ≥1m is avoided. According to industry data, the unit length cost increases by 1.5-2 times for every 1m increase in conveyor belt width. In this design, the total material cost of the double-sided narrow belts is 40%-50% lower than that of a single wide belt of the same specification. Furthermore, there is no need to purchase dedicated wide conveyor equipment, reducing initial equipment investment by more than 30%. The single maintenance time is ≤30 minutes, compared to 2 hours for traditional wide belts, resulting in a 60% reduction in annual maintenance costs. The overall economic efficiency is significantly improved, eliminating the need for a large conveyor belt. In situations where installation and maintenance costs are higher, the narrow-width side conveyor belt 102 can be installed and replaced without large hoisting tools, reducing the maintenance time per person to less than 30 minutes. Traditional wide belts require 2-3 people and take more than 2 hours. At the same time, the segmented structure allows for the individual replacement of damaged parts. If one side of the conveyor belt is worn, it avoids downtime losses caused by replacing the whole belt, reducing annual maintenance costs by 60% and overall costs by 40%-60% compared to traditional solutions. The middle conveyor roller 103 provides rigid support to the middle of the Mylar sheet, and with the synchronous transmission of the double-sided side conveyor belts 102, the flatness deviation of the Mylar sheet is controlled within 0.1mm / m during the conveying process. This is a significant improvement over the ≥0.5mm / m offset caused by uneven tension of wide belts, laying the foundation for subsequent high-precision bonding.

[0038] The following points should be noted in this article:

[0039] 1. The accompanying drawings of the embodiments disclosed herein only involve structures relevant to the embodiments disclosed herein; other structures may refer to general designs.

[0040] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0041] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A high-precision electrostatic adsorption type Mylar film bonding device, comprising: Mylar film conveyor frame (1), lower component conveyor frame (2) and roller (3); characterized in that, a lower component conveyor frame (2) is provided below the mylar film conveyor frame (1), a roller (3) is provided above the tail of the lower component conveyor frame (2), a rotating central drive shaft (101) is arranged in a spaced array on the mylar film conveyor frame (1), both ends of the central drive shaft (101) are tensioned and rotatably connected to a side conveyor belt (102), a central conveyor roller (103) is fixedly connected to the middle of the central drive shaft (101), an upper guide plate (105) is fixedly connected to the upper side of the tail of the mylar film conveyor frame (1), and a tail guide roller (104) is rotatably connected to the lower side of the tail of the mylar film conveyor frame (1).

2. The high-precision electrostatic adsorption type Mylar film bonding device according to claim 1, characterized in that, The top surfaces of the middle conveyor roller (103) and the side conveyor belt (102) are at the same height, the tail guide roller (104) is below the upper guide plate (105), and the tail guide roller (104) is above the lower component conveyor frame (2).

3. The high-precision electrostatic adsorption type Mylar film bonding device according to claim 1, characterized in that, The upper part of the lower component conveying frame (2) is provided with rotating lower component conveying rollers (201) arranged in an array at intervals. An electrostatic generator (202) is fixedly connected to the upper part of the lower component conveying frame (2). Side connecting slides (203) and side connecting slide rods (204) are fixedly connected to both sides of the rear part of the lower component conveying frame (2).

4. The high-precision electrostatic adsorption type Mylar film bonding device according to claim 3, characterized in that, The electrostatic generator (202) is located downstream of the upper guide plate (105), and the side connecting slide (203) and the side connecting slide (204) are both located downstream of the electrostatic generator (202).

5. A high-precision electrostatic adsorption type Mylar film bonding device according to claim 3, characterized in that, Both sides of the rolling roller (3) are rotatably connected to a lower connecting slide (301). The upper part of the lower connecting slide (301) is fixedly connected to an upper support spring (302). The upper end of the upper support spring (302) is fixedly connected to the upper connecting slide (303). The top of the upper connecting slide (303) is rotatably connected to an upper threaded rod (304).

6. The high-precision electrostatic adsorption type Mylar film bonding device according to claim 5, characterized in that, The lower connecting slide (301) and the upper connecting slide (303) are vertically slidably connected along the side connecting slide (203), and the head end of the lower connecting slide (301) and the side connecting slide (204) are axially slidably connected.

7. A high-precision electrostatic adsorption type Mylar film bonding device according to claim 6, characterized in that, The upper threaded rod (304) and the upper connecting slide (303) are threadedly connected, and the rolling roller (3) is located above the lower component conveying frame (2) and the lower component conveying roller (201).

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