A positioning and pasting mechanism and method for a back-shaped adhesive tape

Abstract

This invention relates to the field of adhesive bonding technology, specifically to a positioning and bonding mechanism for a U-shaped adhesive backing, comprising an adhesive backing fixing device and a transparent substrate fixing device. The transparent substrate fixing device includes a transparent substrate fixing plate, with fixing limit blocks and opening limit blocks at both ends. The adhesive backing fixing device includes an adhesive backing positioning platform, a linear guide rail, a movable film-tearing mechanism, and a negative pressure air path. Two sliders are provided on the linear guide rail, and the sliders are connected to the movable film-tearing mechanism. The adhesive backing positioning platform is provided with a pressure equalizing negative pressure groove and floating positioning blocks A and B. The pressure equalizing negative pressure groove is connected to an air pump through the negative pressure air path. The movable film-tearing mechanism includes a fixed wing, a inclined frame, a contact adhesive pad, and a rotating shaft. This invention systematically solves the problems of easy deformation, numerous air bubbles, and low efficiency in traditional adhesive backing bonding through dynamic positioning, pressure equalizing adsorption, mechanical optimization, and modular design, significantly improving the yield and speed of automated production.

Description

Technical Field

[0001] This invention relates to the field of adhesive positioning technology, specifically to a positioning and pasting mechanism and method for a spiral-shaped adhesive backing. Background Technology

[0002] 3M adhesive is an important part of fixing and connecting important components. The combination of transparent substrates (such as glass covers) with screens, touch functions, etc. is often used in white goods, automotive interiors and other structures. When producing the whole module, double-sided adhesive is needed to bond the transparent substrate with other structural components to achieve the integrity of the function.

[0003] Due to the 3M adhesive's tendency to deform and its soft material, manual application presents numerous challenges in actual production. The adhesive used in this invention has a U-shaped structure with a long, thin strip in the middle and a large bonding area at both ends. The transparent substrate has components attached, making it a non-single-sided structure, and requires high application precision. Therefore, manually peeling off the film during operation easily causes deformation. Bubbles, misalignment, adhesive block stacking, and adhesive overflow are unavoidable during the application process, resulting in low module appearance and adhesion performance pass rates, as well as low production efficiency. Summary of the Invention

[0004] A positioning and pasting mechanism for a U-shaped adhesive backing includes an adhesive backing fixing device and a transparent substrate fixing device. The transparent substrate fixing device includes a transparent substrate fixing plate, and the two ends of the transparent substrate fixing plate are provided with fixing limiting blocks and opening limiting blocks. The adhesive fixing device includes an adhesive positioning platform, a linear guide rail, a movable film-tearing mechanism, and a negative pressure air circuit. Two sliders are provided on the linear guide rail, and the sliders are connected to the movable film-tearing mechanism. The adhesive positioning platform is equipped with a pressure equalization negative pressure groove and floating positioning block A and floating positioning block B. The pressure equalization negative pressure groove is connected to an air pump through a negative pressure air circuit. The mobile film-tearing mechanism includes a fixed wing, an inclined frame, a contact pad, and a rotating shaft. The inclined frame has two inclined surfaces in the horizontal movement direction, the rotating shaft has a toothed groove in the middle section, and centrifugal grooves are symmetrically opened on both sides. The centrifugal grooves are fitted with matching centrifugal bearings, and the release paper is clamped by the frictional contact between the centrifugal bearings and the toothed grooves.

[0005] A negative pressure pipeline is installed below the equalizing negative pressure tank. The negative pressure pipeline includes an internal pipeline, an external pipeline, and a five-way valve. The internal pipelines are combined into an external pipeline and then connected to the air pump through the five-way valve.

[0006] The adhesive positioning platform has a contoured platform, with a hollowed-out area in the middle to provide space for the protruding components of the transparent substrate assembly.

[0007] Floating positioning block A and floating positioning block B are placed symmetrically, and the contouring table is provided with contouring grooves at corresponding positions. Positioning block A and positioning block B are trapezoidal bodies, and inclined structures are provided in the direction of guide rail movement. They are connected to the bottom of the contouring grooves through compression springs A and B.

[0008] The adhesive backing fixing device also includes a base, on which a base plate is provided, and an adhesive backing positioning platform is installed on the base plate.

[0009] The slider is connected to the fixed wing.

[0010] Both the fixed limit block and the opening limit block are equipped with anti-wear rubber pads. The opening limit block includes a cover plate, a U-shaped block and bolts. The cover plate and the U-shaped block are threaded.

[0011] A method for positioning and applying a herringbone-shaped adhesive backing, comprising the following steps: S1: Place the adhesive backing on the contoured platform of the adhesive backing positioning stage, and use the trapezoidal inclined surface structure and compression spring of floating positioning block A and floating positioning block B for positioning. S2: Start the air pump to evenly adsorb the adhesive through the equalizing negative pressure tank and adjust the position of the adhesive. S3: Slide the film-tearing mechanism to the beginning of the adhesive backing, and push the floating positioning block A and floating positioning block B down through the inclined frame until the film-tearing mechanism contacts the adhesive backing; S4: Embed the release paper into the toothed groove of the rotating shaft, clamp the release paper with the centrifugal bearing, start the rotary motor to drive the rotating shaft to rotate and move the inclined frame horizontally; S5: Place the glass assembly into the fixing limit block and opening limit block of the transparent substrate fixing plate, and tighten the bolts to complete the fixing; S6: Align the transparent substrate fixing plate with the glass positioning groove and press it down to compress the floating positioning block A and the floating positioning block B to achieve complete adhesion between the adhesive and the glass.

[0012] In step S4, the slope angle of the inclined frame decomposes the vertical tension into horizontal thrust, reducing the stretching deformation of the adhesive backing.

[0013] In step S5, anti-abrasion pads are embedded in the fixed limit block and the opening limit block to prevent scratches on the glass surface.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The up-and-down floating design of the spring-loaded positioning block ensures accurate positioning of the adhesive backing while avoiding structural interference with other mechanical components, thus improving operational smoothness and reliability. 2. A pressure equalization negative pressure groove combined with a five-way valve is used to adjust the negative pressure distribution, ensuring uniform pressure in each area when the adhesive is adsorbed, avoiding local deformation or warping, and improving the bonding stability. 3. The frictional contact design between the centrifugal bearing and the toothed groove enables stable clamping and release of the release paper; when the inclined frame moves horizontally, the vertical tension is decomposed into horizontal thrust through the inclined angle, effectively reducing the tensile deformation during the adhesive peeling process; during the movement, the contact pad simultaneously smooths the adhesive, significantly reducing the probability of bubbles and wrinkles and improving the bonding quality. 4. The adhesive backing fixing device and the transparent substrate fixing device are designed independently, simplifying the transmission structure and reducing the complexity of the mechanism; the limiting groove and the linkage pressing mechanism realize the rapid and accurate positioning of the transparent substrate, which greatly improves the production efficiency while ensuring the bonding accuracy. Attached Figure Description

[0015] Figure 1 A schematic diagram of the adhesive positioning and bonding mechanism; Figure 2 A schematic diagram of the bottom of the adhesive positioning and pasting mechanism; Figure 3 This is a schematic diagram of the equalizing negative pressure tank and pipeline; Figure 4 This is a schematic diagram of the structure at the transparent substrate fixing plate. Figure 5 This is a schematic diagram of the movable film-tearing mechanism. Figure 6 This is a schematic diagram of the structure at the centrifugal bearing. Figure 7 This is a cross-sectional view of the centrifugal bearing. Figure 8 This is a schematic diagram of the structure at point A of the floating positioning block; Figure 9 This is a schematic diagram of the structure at point B of the floating positioning block.

[0016] In the diagram: 1-Adhesive positioning platform; 2-Equalizing negative pressure groove; 3-Floating positioning block A; 301-Positioning block A; 302-Compression spring A; 4-Floating positioning block B; 401-Positioning block B; 402-Compression spring B; 5-Moving film-tearing mechanism; 501-Fixed wing; 502-Inclined frame; 503-Contact adhesive pad; 504-Rotating shaft; 505-Rotating motor; 506-Centrifuge tank; 507-Centrifuge bearing. 508-Gserrated groove; 6-Negative pressure air path; 601-Internal pipeline; 602-External pipeline; 7-Transparent substrate fixing plate; 701-Fixing limit block; 702-Opening limit block; 703-Cover plate; 704-U-shaped block; 705-Bolt; 706-Anti-wear pad; 8-Base plate; 9-Glass positioning groove; 11-Base; 12-Linear guide rail; 13-Slider; 14-Five-way valve; 15-Air pump. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: As Figure 1-9 As shown, a positioning and pasting mechanism for a U-shaped adhesive backing includes two mechanisms: an adhesive backing fixing device and a transparent substrate fixing device. The adhesive backing fixing device mainly includes an adhesive backing positioning platform 1, a linear guide rail 12, a moving film-tearing mechanism 5, and a negative pressure air passage 6. The adhesive backing positioning platform 1 has a contoured platform surface, with a hollowed-out area in the middle to provide space for the protruding components of the transparent substrate assembly. A pressure equalizing negative pressure groove 2 is provided on the contoured platform surface. An internal pipeline 601 is opened below the pressure equalizing negative pressure groove 2. The pipelines in the same area converge and connect to the external pipeline 602. The pipelines in the four areas are connected to an air pump 15 through a five-way valve 14. When the air pump 15 is started, the negative pressure generated in the air passage 6 is used to adsorb the adhesive backing. The pressure equalizing negative pressure groove 2 equalizes the air pressure and avoids pressure concentration.

[0019] There are two floating positioning blocks A3 at each end of the contouring table, and four floating positioning blocks B4 in the fine glue area. They are all placed symmetrically. The table is provided with contouring grooves at corresponding positions. Positioning blocks A301 and B401 are both provided with inclined structures in the moving direction of the guide rail 12, and are connected to the bottom of the groove through compression springs A302 and B402.

[0020] A base plate 8 and an adhesive positioning platform 1 are sequentially mounted on the base 11. Two sliders 13 on the linear guide rail 12 are threadedly connected to the movable film-tearing mechanism 5 on the adhesive positioning platform 1. The film-tearing mechanism 5 includes an inclined frame 502, a fixed wing 501, a contact pad 503, and a rotating shaft 504. The fixed wing 501 is connected to the sliders 13, the contact pad 503 contacts the adhesive, and the inclined frame 502 has a hollow center with a rotating shaft 504 mounted on it. The middle part of the inclined frame 502 has a toothed groove 508, and a rotating shaft is mounted on one end. The motor 505 has centrifugal grooves 506 of a certain depth symmetrically formed on both sides. End A is close to the toothed groove 508, and end B is away from the toothed groove 508. Centrifugal bearings 507, shorter than the centrifugal groove 506, are installed in the centrifugal grooves 506. The centrifugal bearings 507 clamp and release the adhesive release paper by rotating within the centrifugal grooves 506 and rubbing against the toothed grooves 508. The rotating motor 505 drives the rotating shaft 504 to rotate, tightening the release film. This, combined with the horizontal movement of the inclined frame 502, completes the film-tearing process. The upward pulling force during film-tearing by the inclined surface effectively reduces adhesive deformation. Because the contact pad 503 contacts and moves with the release film, it effectively smooths the adhesive, preventing air bubbles during bonding. The floating positioning block contacts the inclined frame 502. The floating positioning block is automatically compressed by the inclined surface and springs back when it leaves, maintaining its positioning function.

[0021] The transparent substrate fixing device is provided with a fixing limit block 701 and an opening limit block 702 at both ends. The opening limit block 702 includes a cover plate 703 and a U-shaped block 704, and is provided with threads. The transparent substrate is fixed by screwing in two bolts 705. Both the fixing limit block 701 and the opening limit block 702 are provided with anti-wear pads 706 to protect the contact surface of the transparent substrate.

[0022] like Figure 1-9 As shown, the herringbone adhesive positioning and bonding mechanism of the present invention consists of an adhesive fixing device and a transparent substrate fixing device, and the specific implementation is as follows: The adhesive fixing device includes an adhesive positioning platform 1, a linear guide rail 12, a movable film-tearing mechanism 5, and a negative pressure air passage 6. The adhesive positioning platform 1 has a hollowed-out area in the center of its contoured surface to avoid protruding components of the transparent substrate assembly. A pressure-equalizing negative pressure groove 2 is arranged on the platform, and its lower part is connected to an external pipe 602 via an internal pipe 601. The four sets of pipes are connected to an air pump 15 via a five-way valve 14. After the air pump 15 is started, the adsorption force generated by the negative pressure air passage 6 acts evenly on the adhesive through the pressure-equalizing negative pressure groove 2, avoiding deformation caused by localized pressure concentration.

[0023] Two floating positioning blocks A3 are symmetrically arranged at both ends of the contouring table, and four floating positioning blocks B4 are arranged in the fine glue area. Contouring grooves are opened at the corresponding positions of the table. Positioning blocks A3 and B4 are trapezoidal bodies with inclined structures along the moving direction of the linear guide rail 12, and are connected to the bottom of the contouring groove through compression springs A302 and B402 to realize the up-and-down floating function.

[0024] A base plate 8 and an adhesive backing positioning platform 1 are mounted on the base 11. A linear guide rail 12 is fixed to the base 11, and two sliders 13 on it are threadedly connected to a movable film-tearing mechanism 5. The movable film-tearing mechanism 5 includes: Fixed wing 501: fixed to slider 13; Inclined frame 502: It has two inclined surfaces in the horizontal movement direction, and the pivot 504 is installed in the hollow area in the middle; Shaft 504: The middle section is a toothed groove 508, and centrifugal grooves 506 are symmetrically opened on both sides. The centrifugal grooves 506 are fitted with centrifugal bearings 507 with clearance. Contact pad 503: in contact with the adhesive backing surface.

[0025] The rotary motor 505 drives the rotating shaft 504 to rotate, and the centrifugal bearing 507 makes frictional contact with the toothed groove 508 within the centrifugal groove 506, thereby clamping and releasing the release paper. When the inclined plane frame 502 moves horizontally, the inclined plane decomposes the vertical tension into a horizontal thrust, reducing the stretching deformation of the adhesive backing; at the same time, the contact pad 503 smooths the adhesive backing as it moves, effectively suppressing the generation of air bubbles. When the floating positioning block A3 and floating positioning block B4 contact the inclined plane frame 502, they are compressed to be flush with the table surface, ensuring that the mechanism moves without interference. After disengagement, they are reset by springs to maintain positioning.

[0026] The transparent substrate fixing device includes a transparent substrate fixing plate 7, with fixing limiting blocks 701 and opening limiting blocks 702 at both ends. The opening limiting block 702 consists of a cover plate 703, a U-shaped block 704, and bolts 705. The cover plate 703 and U-shaped block 704 are threaded, and the transparent substrate is fixed by tightening the bolts 705. Anti-abrasion pads 706 are embedded in the fixing limiting blocks 701 and opening limiting blocks 702 to prevent scratches on the surface of the transparent substrate. When the transparent substrate fixing plate 7 is closed, it is precisely positioned by the glass positioning groove 9. After being pressed down, it drives the floating positioning blocks A3 and B4 to compress, ensuring complete adhesion between the adhesive backing and the transparent substrate.

[0027] One embodiment of the present invention is as follows: Step 1: Adhesive positioning and adsorption.

[0028] Place the adhesive backing: Place the U-shaped adhesive backing on the contour table surface of the adhesive backing positioning table 1, and perform initial positioning through the trapezoidal inclined surface structure of floating positioning block A3 and floating positioning block B4, as well as compression spring A302 and compression spring B402. Start negative pressure adsorption: Turn on the air pump 15 to evenly adsorb the backing adhesive through the equalizing negative pressure tank 2, and use the five-way valve 14 to adjust the negative pressure in each area to ensure that the backing adhesive is flat and free from deformation. Fine-tuning position: Adjust the position of the adhesive backing manually or via sensor to precisely align it with the contoured tabletop.

[0029] Step 2: Remove the release paper.

[0030] Move the film-tearing mechanism to the beginning: Slide the film-tearing mechanism 5 along the linear guide rail 12 to the beginning of the adhesive backing. The inclined frame 502 contacts the inclined surfaces of the floating positioning block A3 and the floating positioning block B4, pressing them down to be flush with the table surface to avoid interference between the mechanisms. Clamping release paper: The adhesive-backed release paper is embedded into the toothed groove 508 of the rotating shaft 504. The rotary motor 505 is started to drive the rotating shaft 504 to rotate. Under the action of centrifugal force, the centrifugal bearing 507 rubs against the toothed groove 508 to clamp the release paper. Uniform film peeling: The horizontally moving inclined frame 502 decomposes the vertical tension into horizontal thrust through its inclined angle, reducing the stretching deformation of the adhesive backing; at the same time, the contact pad 503 smooths the adhesive backing as it moves, reducing the generation of air bubbles.

[0031] Step 3: Fixing and bonding the transparent substrate.

[0032] Fixing the transparent substrate: Insert one side of the transparent substrate (such as a glass cover) into the fixing limiting block 701, and place the other side into the U-shaped block 704 of the opening limiting block 702. Tighten the bolt 705 to complete the fixing. Pressing and bonding: Align the transparent substrate fixing plate 7 with the glass positioning groove 9 and press lightly to drive the floating positioning block A3 and floating positioning block B4 to press back down, ensuring that the adhesive backing is in complete contact with the transparent substrate. Check the bonding quality: Inspect the bonding area using a pressure sensor or visually to confirm that there are no bubbles, misalignments, or excess adhesive.

[0033] Step 4: Reset and cycle operation.

[0034] Reset film tearing mechanism: Move the film tearing mechanism 5 back to the starting end along the linear guide rail 12, and the floating positioning block A3 and floating positioning block B4 are reset under the action of the spring; Replace the adhesive and substrate: Remove the bonded component, replace the adhesive and transparent substrate, and repeat the above steps to proceed to the next cycle.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A positioning and pasting mechanism for a herringbone adhesive backing, characterized in that, It includes an adhesive backing fixing device and a transparent substrate fixing device. The transparent substrate fixing device includes a transparent substrate fixing plate (7), and the transparent substrate fixing plate (7) has fixing limit blocks (701) and opening limit blocks (702) at both ends. The adhesive fixing device includes an adhesive positioning platform (1), a linear guide rail (12), a movable film-tearing mechanism (5), and a negative pressure air passage (6). Two sliders (13) are provided on the linear guide rail (12), and the sliders (13) are connected to the movable film-tearing mechanism (5). The adhesive positioning platform (1) is provided with a pressure equalization negative pressure groove (2) and floating positioning block A (3) and floating positioning block B (4). The pressure equalization negative pressure groove (2) is connected to an air pump (15) through a negative pressure air passage (6). Floating positioning block A (3) and floating positioning block B (4) are placed symmetrically, and floating positioning block A (3) includes positioning block A (301) and compression spring A (302); floating positioning block B (4) includes positioning block B (401) and compression spring B (402). The adhesive positioning stage (1) has a contoured platform, and the hollow area in the middle is reserved for the protruding devices of the transparent substrate assembly; The contouring table is provided with contouring grooves at corresponding positions. Positioning block A (301) and positioning block B (401) are trapezoidal bodies. They are both provided with inclined structures along the moving direction of the linear guide rail (12) and are connected to the bottom of the contouring grooves by compression spring A (302) and compression spring B (402) respectively. The adhesive backing fixing device also includes a base (11), on which a base plate (8) is provided. The adhesive backing positioning platform (1) is installed on the base plate (8), and glass positioning grooves (9) are provided on both ends of the base plate (8). When the transparent substrate fixing plate (7) is closed, it is positioned by the glass positioning grooves (9). The movable film-tearing mechanism (5) includes a fixed wing (501), an inclined frame (502), a contact pad (503), a rotating shaft (504), and a rotary motor (505) for driving the rotating shaft (504) to rotate. The inclined frame (502) has two inclined surfaces in the horizontal moving direction. The inclined frame (502) pushes the floating positioning block A (3) and the floating positioning block B (4) down to the movable film-tearing mechanism (5) to contact the backing adhesive. The rotating shaft (504) has a toothed groove (508) in the middle section and centrifugal grooves (506) symmetrically opened on both sides. The centrifugal bearing (507) is provided in the gap of the centrifugal groove (506). The release paper is clamped by the frictional contact between the centrifugal bearing (507) and the toothed groove (508).

2. The positioning and pasting mechanism for a herringbone adhesive backing according to claim 1, characterized in that, A negative pressure air passage (6) is provided below the equalizing negative pressure tank (2). The negative pressure air passage (6) includes an internal pipeline (601), an external pipeline (602) and a five-way valve (14). The internal pipeline (601) is combined into an external pipeline (602) and then connected to the air pump (15) through the five-way valve (14).

3. The positioning and pasting mechanism for a herringbone adhesive backing according to claim 1, characterized in that, The slider (13) is connected to the movable film-tearing mechanism (5) via the fixed wing (501).

4. The positioning and pasting mechanism for a herringbone adhesive backing according to claim 2, characterized in that, Both the fixed limiting block (701) and the opening limiting block (702) are provided with anti-wear rubber pads (706). The opening limiting block (702) includes a cover plate (703), a U-shaped block (704) and a bolt (705). The cover plate (703) and the U-shaped block (704) are provided with threads.

5. A method for positioning and pasting a herringbone adhesive based on the positioning and pasting mechanism of the herringbone adhesive according to claim 4, characterized in that, Includes the following steps: S1: Place the adhesive backing on the contour table of the adhesive backing positioning table (1) and use the trapezoidal inclined surface structure of the floating positioning block A (3) and the floating positioning block B (4) and the compression spring A (302) and the compression spring B (402) for positioning; S2: Start the air pump (15) to evenly adsorb the backing adhesive through the equalizing negative pressure tank (2) and adjust the position of the backing adhesive; S3: Slide the film-tearing mechanism (5) to the beginning of the adhesive backing, and push the floating positioning block A (3) and floating positioning block B (4) down to the film-tearing mechanism (5) and contact the adhesive backing through the inclined frame (502); S4: Insert the release paper into the toothed groove (508) of the rotating shaft (504), clamp the release paper through the centrifugal bearing (507), start the rotary motor (505) to drive the rotating shaft (504) to rotate and move the inclined plane frame (502) horizontally. S5: Place the glass assembly into the fixing limit block (701) and opening limit block (702) of the transparent substrate fixing plate (7), and tighten the bolt (705) to complete the fixing; S6: Align the transparent substrate fixing plate (7) with the glass positioning groove (9) and press it down to compress the floating positioning block A (3) and the floating positioning block B (4) to achieve complete adhesion between the adhesive and the glass.

6. The positioning and pasting method of the herringbone adhesive according to claim 5, characterized in that: In step S4, the slope angle of the inclined plane frame (502) decomposes the vertical tension into a horizontal thrust.

7. The positioning and pasting method of the herringbone adhesive according to claim 5, characterized in that: In step S5, the fixed limiting block (701) and the opening limiting block (702) are embedded with anti-wear rubber pads (706).

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