Capillary end face array suction device for soft noodle glue of not more than 2mm width

Abstract

The utility model discloses a kind of capillary end face array adsorption devices for soft noodle glue of width not more than 2mm, including fixing device, the bottom of fixing device is equipped with holding body, parallelly arranged capillary is fixedly embedded in holding body inside, the adsorption end of capillary, i, e. the first end face flush arrangement and jointly constitute continuous adsorption face, the width of continuous adsorption face is ≤2mm;The second end face of capillary is connected vacuum connection cavity, vacuum connection cavity is connected vacuum interface, vacuum interface is used to connect external vacuum source;The utility model is applicable to 0.6-1 mm width soft noodle glue in the automation of mobile phone, AR, folding screen and other ultra-narrow frame product pasting.

Description

Technical Field

[0001] This utility model relates to the field of automated mounting technology, and in particular to a capillary end-face array adsorption device for soft noodle adhesive with a width of no more than 2mm. Background Technology

[0002] As smartphones, AR glasses, foldable screens, and other electronic products move towards ultra-narrow bezels and ultra-thin designs, the requirements for bezel width are becoming increasingly stringent. Taking mobile phones as an example, the bezel width has been reduced from 3-5mm in the early days to 0.6-1mm currently. Correspondingly, the width of flexible adhesive strips used in applications such as battery edge sealing, screen cushioning, and FPC reinforcement has also been reduced to 0.6-1mm, with a thickness of only 0.2-0.5mm and a length typically 20-100mm.

[0003] In automated application processes, these ultra-narrow flexible adhesive strips need to be picked up from the tray using a vacuum suction device, then transferred and precisely applied to the target location. However, existing vacuum suction cup technology has the following prominent problems when handling flexible adhesive strips ≤2mm wide: 1. Insufficient adsorption precision, resulting in a low success rate. Existing vacuum suction cups typically have an adsorption pore size ≥ 0.8 mm, while the width of the adhesive strip being adsorbed is only 0.6-1 mm. When the adsorption pore size is close to or exceeds the width of the adhesive strip, the vacuum force easily acts on the outer area of ​​the adhesive strip, lifting the release film or causing the adhesive strip to tear. In actual production, the adsorption success rate is less than 60%, far below the requirements for industrial applications (typically ≥ 99.5%).

[0004] 2. Prone to clogging and has a short service life. Traditional vacuum suction cups employ a deep-hole structure, with hole depths typically ranging from 5 to 20 mm. During the suction process, impurities such as adhesives and dust can easily enter and accumulate in these deep holes, causing blockages. Once a single hole becomes clogged, the entire suction cup usually needs to be replaced, resulting in a lifespan of only about 20,000 cycles and high maintenance costs.

[0005] 3. Uneven vacuum distribution can cause parts to fly off during high-speed operation. The spacing between the suction holes of existing suction cups is usually 2-5mm. When the width of the adhesive strip is only 1mm, only 1-2 rows of suction holes can actually contact the adhesive strip. This results in significant differences in the vacuum degree at different positions of the adhesive strip. When operating at high speed (moving speed 1.5 m / s, acceleration 8g), the adhesive strip is prone to flying off, with a flying-off rate of over 2%.

[0006] 4. The replacement process is time-consuming, impacting production efficiency. In a multi-variety, small-batch (multi-SKU) production model, different products require different specifications of adsorption fixtures. Replacing existing fixtures requires steps such as disassembling screws, adjusting positions, and recalibrating, and the entire replacement takes 15-30 minutes, which cannot meet the requirements for rapid line cutting (usually requiring downtime ≤10 minutes).

[0007] 5. Unable to adapt to curved surface mounting requirements For some products (such as wraparound screen phones and AR glasses), the mounting surface is curved, requiring the adhesive strip to fully adhere to the curved surface during transfer. Existing flat suction cups cannot adapt to curved shapes, and bubbles and wrinkles are easily generated after transfer, requiring secondary rolling processing, which increases the number of processes and costs.

[0008] Therefore, there is an urgent need to develop an adsorption device specifically for soft noodle adhesive with a width of ≤2mm. The device should have the following characteristics: adsorption surface width ≤2mm, no deep pore structure, uniform vacuum distribution, quick replacement, and adaptability to curved surfaces. Summary of the Invention

[0009] The purpose of this invention is to address the shortcomings of existing technologies by providing a capillary end-face array adsorption device for soft adhesive strips with a width of no more than 2mm. This device solves the problems of insufficient adsorption accuracy, easy clogging, short service life, long replacement time, and inability to adapt to curved surfaces of existing vacuum suction cups. It achieves uniform adsorption of adhesive strips with a width of ≤2mm across the entire surface, with a clogging rate of <1%, an overall replacement time of <5 minutes, and can preset the curvature according to the curved shape of the object to be adhered to, completing a one-time "adsorption-transfer-adhesion" operation.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: A capillary end-face array adsorption device for soft noodle adhesive with a width of no more than 2 mm includes a fixing device, a retaining body at the bottom of the fixing device, and parallel capillary tubes fixedly embedded inside the retaining body. The adsorption ends of the capillary tubes, i.e., the first end faces, are arranged flush and together form a continuous adsorption surface with a width of ≤2 mm. The second end face of the capillary tubes is connected to a vacuum connection cavity, and a vacuum interface is connected to the outside of the vacuum connection cavity. The vacuum interface is used to connect to an external vacuum source.

[0011] Furthermore, the capillaries are metal capillaries, with an outer diameter of 0.1–0.3 mm and a wall thickness of 0.03–0.05 mm for a single capillary; the capillaries are arranged in an array in the holder, with a center-to-center distance of 0.15–0.5 mm between adjacent capillaries.

[0012] Furthermore, the capillary tubes are fixed in the retainer by low-temperature curing epoxy resin or laser spot welding, and each capillary tube can be replaced independently.

[0013] Furthermore, the capillary is made of stainless steel, titanium alloy, or aluminum alloy, and the retainer is made of aluminum alloy, engineering plastic, or stainless steel.

[0014] Furthermore, the retainer has a detachable structure, and a quick-change interface is provided on one side of the second end face. The quick-change interface includes one or more of a dovetail groove structure and a magnetic suction structure.

[0015] Furthermore, the dovetail groove structure adopts a T-shaped groove or a trapezoidal groove, and the magnetic attraction structure adopts a permanent magnet or an electromagnet.

[0016] Furthermore, the width of the continuous adsorption surface is 0.5–1 mm, and the length is 10–100 mm.

[0017] Furthermore, the retainer can be processed into a corresponding planar, arc-shaped, or irregularly shaped profile according to the shape of the soft noodle adhesive to be adsorbed, so that the adsorption surface is fully attached to the soft noodle adhesive.

[0018] Furthermore, a buffer chamber is provided inside the vacuum connection cavity to equalize the vacuum level of each capillary, so that the difference in vacuum level is ≤5%.

[0019] Furthermore, a vacuum sensor is installed inside the vacuum connection cavity to monitor the vacuum level in real time and issue an alarm signal when the vacuum level is abnormal.

[0020] This invention employs multiple hollow capillaries as the core adsorption component. The first end faces of the capillaries are arranged flush, forming a continuous adsorption surface with a width ≤1 mm, used for direct contact with the soft adhesive strip and applying vacuum adsorption force. The capillaries are made of metal (such as stainless steel, titanium alloy, or aluminum alloy), with an outer diameter of 0.1-0.3 mm, a wall thickness of 0.03-0.05 mm, and an inner diameter of approximately 0.04-0.24 mm. A retainer is used to fix and support the capillary array. Multiple capillaries are arranged in an array and embedded in the retainer, with a center-to-center distance of 0.15-0.5 mm between adjacent capillaries, ensuring a dense vacuum distribution on the adsorption surface. The capillaries are fixed to the retainer by low-temperature curing epoxy resin (curing temperature <80℃) or laser spot welding, and individual capillaries can be replaced independently. The retainer material can be aluminum alloy, engineering plastics (such as PEEK), or stainless steel.

[0021] The retainer can be processed into different shapes according to actual application requirements: Planar type: Suitable for planar mounting scenarios; Arc type: The radius of curvature R is 0.5-5mm (preferably 1-3mm), which is suitable for curved surface mounting scenarios. The curvature matches the curvature of the surface of the object being mounted. Irregular contours: Manufactured according to CAD drawings provided by the customer, suitable for mounting scenarios with special shapes.

[0022] The vacuum connection chamber is located on the back of the holder and is connected to the second end (back port) of the capillary. The vacuum connection chamber contains a buffer chamber to equalize the vacuum level of each capillary, ensuring that the difference in vacuum level between capillary tubes at different locations is ≤5%, thus guaranteeing a uniform distribution of adsorption force.

[0023] The vacuum interface, located on the vacuum connection cavity, is used to connect to an external vacuum source (such as a vacuum pump or vacuum generator). The vacuum interface uses a standard quick-connect connector (such as a KF connector or a pneumatic quick-connect connector) for easy connection and disconnection.

[0024] A quick-change interface, located on the back of the retainer, allows for rapid replacement of the device. The quick-change interface includes a dovetail groove structure and / or a magnetic suction structure. Dovetail groove structure: It adopts T-shaped groove or trapezoidal groove, and can be quickly installed and disassembled by sliding snap-fit; Magnetic structure: It uses permanent magnets (such as neodymium iron boron magnets) or electromagnets to achieve quick installation through magnetic attraction, and the attraction force is adjustable.

[0025] The two structures can be used individually or in combination, with an overall replacement time of less than 5 minutes (excluding vacuum tubing connection time).

[0026] A vacuum sensor is used to monitor the vacuum level in real time. When the vacuum level is lower than a set threshold (e.g., -40 kPa) or the vacuum level fluctuates beyond the set range, an alarm signal is issued to prompt the operator to check the status of the device.

[0027] In use, the device is installed on the placement equipment (such as a robotic arm or swing arm) via a quick-change interface and connected to a vacuum source. When it is necessary to pick up the flexible adhesive strips, the control system activates the vacuum source. The vacuum enters the vacuum connection chamber through the vacuum interface and is then transmitted to the first end face via a capillary tube, forming a uniform negative pressure distribution on the adsorption surface.

[0028] Because the outer diameter of the capillary is only 0.1-0.3 mm and the array spacing is 0.15-0.5 mm, 3-8 capillary tubes can be arranged on a 1 mm wide adsorption surface to form a dense vacuum dot matrix. These vacuum dots form a continuous and uniform adsorption force on the surface of the adhesive strip, ensuring that the adhesive strip is subjected to uniform force across the entire surface and does not overflow at the edges.

[0029] The adsorption surface adopts a zero-depth hole design with the end face being the vacuum port. The vacuum path is extremely short (equal to the length of a capillary tube, usually 10-30 mm), and the end face is open. Even if a small amount of adhesive or dust adheres, it is easy to clean and will not cause deep blockage.

[0030] After picking up the adhesive strip, the device is moved to the target application position by a robotic arm or swing arm. If the holder is pre-set with a curvature that matches the surface of the object to be applied, the adhesive strip can be completely adhered to the curved surface in one go during transfer, without the need for secondary rolling. After application, the vacuum is turned off or positive pressure is applied, and the adhesive strip is automatically released.

[0031] When it is necessary to replace the adsorption device with a different specification, it can be quickly disassembled by sliding out through the dovetail groove structure or releasing the magnetic attraction structure; the new device can be quickly installed in the same way, and the whole process takes less than 5 minutes.

[0032] Compared with the prior art, the present invention has the following beneficial effects: High adsorption precision and high success rate: The adsorption surface width is ≤2mm, precisely matching soft adhesive strips with a width of 0.6-1mm. The vacuum force is concentrated on the surface of the adhesive strip, with zero overflow at the edges, preventing adsorption onto the release film. The densely arranged capillary array ensures uniform force across the entire surface of the adhesive strip. In actual testing, the adsorption offset of a 0.8mm wide adhesive strip is ≤0.02mm, with an adsorption success rate exceeding 99.7%.

[0033] Strong anti-clogging capability and long service life: Utilizing a zero-depth-hole design with the end face serving as the vacuum port, the vacuum path is extremely short, and the open end face allows for easy cleaning even with trace amounts of impurities (using alcohol wiping or ultrasonic cleaning), preventing deep clogging. Even if a single capillary tube is damaged or clogged, it can be replaced individually without replacing the entire device. Service life > 500,000 cycles, clogging rate < 1%, far exceeding existing technology (20,000 cycles life, entire reel becomes unusable after clogging).

[0034] Uniform vacuum distribution and good stability under high-speed operation: The capillary array spacing is only 0.15-0.5mm, forming a dense vacuum lattice within a 1mm width range. This results in a small vacuum gradient and uniform force distribution across different positions of the adhesive strip. The buffer chamber within the vacuum connection cavity further equalizes the vacuum level of each capillary, ensuring a vacuum difference of ≤5%. During high-speed swing arm operation (moving speed 1.5m / s, acceleration 8g), the adhesive strip adheres firmly, with a slippage rate of <0.3%.

[0035] Quick changeover to meet multi-SKU production needs: Utilizing a dovetail groove and magnetic quick-change interface design, the overall changeover time is less than 5 minutes (excluding vacuum pipeline connection time). In multi-variety, small-batch production modes, different specifications of adsorption devices can be quickly switched, meeting the requirement of downtime ≤10 minutes, significantly improving production efficiency.

[0036] Adaptable to curved surfaces, enabling one-time bonding: The retainer can be preset with an arc (R=0.5-5mm) or irregular contour according to the curved surface of the object being bonded, ensuring a perfect match between the adsorption surface and the curved surface. During transfer, the adhesive strip can completely bond with the curved surface in one go, without bubbles or wrinkles, with a bubble rate of <0.3%, eliminating the need for a secondary rolling process, reducing costs, and improving yield.

[0037] Low maintenance cost: Each capillary tube can be replaced independently, making maintenance simple and cost-effective. Compared to existing technologies (which require replacing the entire tray after blockage, with a single maintenance cost of 500-2000 yuan), the cost of a single capillary tube in this device is only 1-5 yuan, reducing maintenance costs by more than 90%.

[0038] In summary, the capillary end-face array adsorption device for soft noodle adhesive with a width of no more than 2 mm provided by this utility model effectively solves many problems of the prior art when dealing with soft noodle adhesive with a width of ≤1 mm through innovative structural design, and has significant technical progress and practical value. Attached Figure Description

[0039] Figure 1 This is a schematic cross-sectional view of the overall structure of the device of this utility model; Figure 2 This is a side view of the overall structure of the device of this utility model; Figure 3 A schematic diagram of the dovetail groove structure for a quick-change interface; Figure 4 A schematic diagram of the magnetic attraction structure for a quick-change interface; Figure 5 This is a magnified schematic diagram of a portion of the adsorption surface (SEM micrograph, magnified 100x, showing the capillary end faces arranged in a flush manner). Figure 6 This is a schematic diagram showing the fit between the arc-shaped retainer and the curved surface of the object being adhered to. Figure 7 For planar retaining solids, the front view and side view are provided. Figure 8 This is a schematic diagram illustrating the fit between the irregular contour maintainer and the curved surface of the object being adhered to. Figure 9 A schematic diagram of the internal structure of the vacuum connection cavity and the layout of the buffer cavity; Wherein: 1-capillary tube; 11-first end face; 12-continuous adsorption surface; 13-second end face; 2-holding body; 3-vacuum connection cavity; 4-vacuum interface; 5-quick-change interface; 51-dovetail groove structure; 52-magnetic structure; 6-vacuum sensor; 7-fixing device; 8-object to be attached. Detailed Implementation

[0040] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit the scope of protection of this utility model. Example 1:

[0041] like Figure 1-9 As shown, this embodiment provides a capillary end-face array adsorption device for soft noodle adhesive with a width of no more than 2 mm. It includes a fixing device 7, a retaining body 2 at the bottom of the fixing device 7, and parallel capillary tubes 1 are fixedly embedded inside the retaining body 2. The adsorption ends of the capillary tubes 1, i.e., the first end faces 11, are arranged flush and together form a continuous adsorption surface 12. The width of the continuous adsorption surface 12 is ≤2 mm. The second end face 13 of the capillary tubes 1 is connected to a vacuum connection cavity 3. The vacuum connection cavity 3 is externally connected to a vacuum interface 4, which is used to connect to an external vacuum source.

[0042] Capillary tube 1 is a metal capillary tube with an outer diameter of 0.1–0.3 mm and a wall thickness of 0.03–0.05 mm. The capillary tubes 1 are arranged in an array within the retainer 2, with a center-to-center distance of 0.15–0.5 mm between adjacent capillary tubes. The capillary tubes 1 are fixed to the retainer 2 by low-temperature curing epoxy resin or laser spot welding, and each capillary tube 1 can be replaced independently.

[0043] The capillary tube 1 is made of stainless steel, titanium alloy, or aluminum alloy, while the retainer 2 is made of aluminum alloy, engineering plastic, or stainless steel. The retainer 2 has a detachable structure, with a quick-change interface 5 on one side of the second end face 13. The quick-change interface 5 includes one or more of a dovetail groove structure 51 and a magnetic attraction structure 52. The dovetail groove structure 51 uses a T-shaped groove or a trapezoidal groove, and the magnetic attraction structure 52 uses a permanent magnet or an electromagnet. The width of the continuous adsorption surface 12 is 0.5–1 mm, and the length is 10–100 mm. The retainer 2 can be processed into a planar, arc-shaped, or irregularly shaped profile according to the shape of the soft adhesive noodle to be adsorbed, ensuring that the adsorption surface 12 fully adheres to the soft adhesive noodle. A buffer chamber is provided within the vacuum connection cavity 3 to equalize the vacuum level of each capillary tube, ensuring a vacuum level difference of ≤5%. A vacuum sensor 6 is provided within the vacuum connection cavity 3 to monitor the vacuum level in real time and issue an alarm signal when the vacuum level is abnormal.

[0044] This embodiment employs multiple hollow capillaries as the core adsorption component. The first end faces of the capillaries are arranged flush, collectively forming a continuous adsorption surface with a width ≤1 mm, used for direct contact with the soft adhesive strip and application of vacuum adsorption force. The capillaries are made of metal (such as stainless steel, titanium alloy, or aluminum alloy), with an outer diameter of 0.1-0.3 mm, a wall thickness of 0.03-0.05 mm, and an inner diameter of approximately 0.04-0.24 mm. A retainer is used to fix and support the capillary array. Multiple capillaries are arranged in an array and embedded in the retainer, with a center-to-center spacing of 0.15-0.5 mm between adjacent capillaries, ensuring a dense vacuum distribution on the adsorption surface. The capillaries are fixed to the retainer by low-temperature curing epoxy resin (curing temperature <80℃) or laser spot welding, and individual capillaries can be replaced independently. The retainer material can be aluminum alloy, engineering plastics (such as PEEK), or stainless steel.

[0045] The retainer can be processed into different shapes according to actual application requirements: Planar type: Suitable for planar mounting scenarios; Arc type: The radius of curvature R is 0.5-5 mm (preferably 1-3 mm), which is suitable for curved surface mounting scenarios. The curvature matches the curvature of the surface of the object being mounted. Irregular contours: Manufactured according to CAD drawings provided by the customer, suitable for mounting scenarios with special shapes.

[0046] The vacuum connection chamber is located on the back of the holder and is connected to the second end (back port) of the capillary. The vacuum connection chamber contains a buffer chamber to equalize the vacuum level of each capillary, ensuring that the difference in vacuum level between capillary tubes at different locations is ≤5%, thus guaranteeing a uniform distribution of adsorption force.

[0047] The vacuum interface, located on the vacuum connection cavity, is used to connect to an external vacuum source (such as a vacuum pump or vacuum generator). The vacuum interface uses a standard quick-connect connector (such as a KF connector or a pneumatic quick-connect connector) for easy connection and disconnection.

[0048] A quick-change interface, located on the back of the retainer, allows for rapid replacement of the device. The quick-change interface includes a dovetail groove structure and / or a magnetic suction structure. Dovetail groove structure: It adopts T-shaped groove or trapezoidal groove, and can be quickly installed and disassembled by sliding snap-fit; Magnetic structure: It uses permanent magnets (such as neodymium iron boron magnets) or electromagnets to achieve quick installation through magnetic attraction, and the attraction force is adjustable.

[0049] The two structures can be used individually or in combination, with an overall replacement time of less than 5 minutes (excluding vacuum tubing connection time).

[0050] A vacuum sensor (optional) is used to monitor the vacuum level in real time. When the vacuum level is lower than a set threshold (e.g., -40 kPa) or the vacuum level fluctuates beyond the set range, an alarm signal is issued to prompt the operator to check the status of the device.

[0051] In use, the device is installed on the placement equipment (such as a robotic arm or swing arm) via a quick-change interface and connected to a vacuum source. When it is necessary to pick up the flexible adhesive strips, the control system activates the vacuum source. The vacuum enters the vacuum connection chamber through the vacuum interface and is then transmitted to the first end face via a capillary tube, forming a uniform negative pressure distribution on the adsorption surface.

[0052] Because the outer diameter of the capillary is only 0.1-0.3 mm and the array spacing is 0.15-0.5 mm, 3-8 capillary tubes can be arranged on an adsorption surface with a width of 1 mm, forming a dense vacuum dot matrix. These vacuum dots form a continuous and uniform adsorption force on the surface of the adhesive strip, ensuring that the adhesive strip is subjected to uniform force across the entire surface and that there is no overflow at the edges.

[0053] The adsorption surface adopts a zero-depth hole design with the end face being the vacuum port. The vacuum path is extremely short (equal to the length of a capillary tube, usually 10-30 mm), and the end face is open. Even if a small amount of adhesive or dust adheres, it is easy to clean and will not cause deep blockage.

[0054] After picking up the adhesive strip, the device is moved to the target application position by a robotic arm or swing arm. If the holder is pre-set with a curvature that matches the surface of the object to be applied, the adhesive strip can be completely adhered to the curved surface in one go during transfer, without the need for secondary rolling. After application, the vacuum is turned off or positive pressure is applied, and the adhesive strip is automatically released.

[0055] When it is necessary to replace the adsorption device with a different specification, it can be quickly disassembled by sliding out through the dovetail groove structure or releasing the magnetic attraction structure; the new device can be quickly installed in the same way, and the whole process takes less than 5 minutes.

[0056] Compared with the prior art, the present invention has the following beneficial effects: High adsorption precision and high success rate: The adsorption surface width is ≤1 mm, precisely matching soft adhesive strips with a width of 0.6-1 mm. The vacuum force is concentrated on the surface of the adhesive strip, with zero overflow at the edges, and it will not adsorb onto the release film. The densely arranged capillary array ensures uniform force across the entire surface of the adhesive strip. In actual tests, the adsorption offset of a 0.8 mm wide adhesive strip is ≤0.02 mm, and the adsorption success rate reaches over 99.7%.

[0057] Strong anti-clogging capability and long service life: Utilizing a zero-depth-hole design with the end face serving as the vacuum port, the vacuum path is extremely short, and the open end face allows for easy cleaning even with trace amounts of impurities (using alcohol wiping or ultrasonic cleaning), preventing deep clogging. Even if a single capillary tube is damaged or clogged, it can be replaced individually without replacing the entire device. Service life > 500,000 cycles, clogging rate < 1%, far exceeding existing technology (20,000 cycles life, entire reel becomes unusable after clogging).

[0058] Uniform vacuum distribution and good stability under high-speed operation: The capillary array spacing is only 0.15-0.5 mm, forming a dense vacuum lattice within a 1 mm width range. The vacuum gradient is small, and the force is uniform at different positions of the adhesive strip. The buffer cavity within the vacuum connection chamber further equalizes the vacuum degree of each capillary, ensuring a vacuum degree difference of ≤5%. During high-speed swing arm operation (moving speed 1.5 m / s, acceleration 8 g), the adhesive strip is firmly adsorbed, with a flyaway rate of <0.3%.

[0059] Quick changeover to meet multi-SKU production needs: Utilizing a dovetail groove and magnetic quick-change interface design, the overall changeover time is less than 5 minutes (excluding vacuum pipeline connection time). In multi-variety, small-batch production modes, different specifications of adsorption devices can be quickly switched, meeting the requirement of downtime ≤10 minutes, significantly improving production efficiency.

[0060] Adaptable to curved surfaces, enabling one-time bonding: The retainer can be preset with an arc (R=0.5-5mm) or irregular contour according to the curved surface of the object being bonded, ensuring a perfect match between the adsorption surface and the curved surface. During transfer, the adhesive strip can completely bond with the curved surface in one go, without bubbles or wrinkles, with a bubble rate of <0.3%, eliminating the need for a secondary rolling process, reducing costs, and improving yield.

[0061] Low maintenance cost: Each capillary tube can be replaced independently, making maintenance simple and cost-effective. Compared to existing technologies (which require replacing the entire tray after blockage, with a single maintenance cost of 500-2000 yuan), the cost of a single capillary tube in this device is only 1-5 yuan, reducing maintenance costs by more than 90%. Example 2:

[0062] like Figure 1-9 As shown, the capillary end-face array adsorption device for soft noodle adhesive with a width of no more than 2 mm provided in this embodiment is as follows: Figure 7 As shown, when a planar adsorption device is used for the automated application of insulating adhesive strips for mobile phone batteries: Structural parameters: Capillary tube 1: Made of 304 stainless steel capillary tube, with an outer diameter of 0.2 mm, a wall thickness of 0.04 mm, an inner diameter of 0.12 mm, and a length of 20 mm.

[0063] The dimensions of the adsorption surface 12 are: 1.1 mm in width and 50 mm in length.

[0064] Capillary arrangement: 5 capillaries are arranged in the width direction and 250 capillaries are evenly distributed in the length direction. The center-to-center spacing of the array is 0.2 mm, for a total of 1250 capillaries.

[0065] Retainer 2: Made of 6061 aluminum alloy, 60 mm in length, 10 mm in width, and 8 mm in thickness, with an anodized surface. The retainer is machined with 1250 insertion holes of 0.21 mm in diameter and 20 mm in depth, with a tolerance of ±0.01 mm.

[0066] Fixing method: After the capillary tube is inserted into the embedding hole, it is fixed by pouring in low-temperature curing epoxy resin (curing temperature 60℃, curing time 2 hours). After curing, the first end face is ground flush with a precision grinder, and the surface roughness Ra≤0.4 μm.

[0067] Vacuum connection cavity 3: Located on the back of the retainer, with dimensions of 50 mm long × 8 mm wide × 5 mm deep, and contains 3 buffer cavities 31, with a total volume of approximately 2 cm³.

[0068] Vacuum Interface 4: Uses an M5×0.8 threaded quick-connect fitting to connect to a vacuum hose with an outer diameter of 6 mm.

[0069] Quick-change interface 5: It adopts a combination structure of T-shaped dovetail groove 51 and permanent magnet 52. The dovetail groove is 8mm wide and 3mm deep; the permanent magnet adopts N35 grade neodymium iron boron magnet, with dimensions of 10mm×5mm×3mm, and 4 magnets are symmetrically distributed, with a single magnet having an attraction force of about 50N.

[0070] Operating parameters: Vacuum level: -65 kPa (provided by vacuum generator).

[0071] Adsorption time: 0.5s (from vacuum start-up to complete adsorption).

[0072] Pick-up-transfer cycle: 2 seconds (including adsorption, movement, adhesion, and release).

[0073] Movement speed: 1.2 m / s, acceleration: 6 g.

[0074] Application scenarios and effects: The device in this embodiment is applied to an automated battery sealing adhesive application line of a mobile phone manufacturer. The adhesive strip being adsorbed is a soft silicone noodle with a width of 0.8mm, a thickness of 0.3mm, and a length of 45mm, and has a release film on one side.

[0075] The device is installed at the end of a 6-axis robotic arm via a quick-change interface. The entire installation process (including sliding into the dovetail groove, magnetic positioning, and connecting the vacuum line) takes 4 minutes. The equipment ran continuously for 24 hours, completing 12,000 pick-and-place operations with a 99.8% success rate (24 of the 12,000 operations failed due to defects in the adhesive strip itself), and no flying strips were observed.

[0076] The adsorption offset of 20 samples was measured, with an average offset of 0.015 mm and a maximum offset of 0.019 mm, which meets the process requirements (≤0.05 mm). The positional accuracy of the adhesive strip after transfer was ±0.03 mm, the bubble rate was 0.2% (24 bubbles out of 12,000, all of which were microbubbles <0.1 mm), and the yield was 99.7%.

[0077] After three months of continuous use (approximately 600,000 operations), no significant performance degradation was observed. The device was cleaned three times during this period (the adsorption surface was wiped with alcohol), and no parts were replaced. Example 3:

[0078] like Figure 1-9 As shown, the capillary end-face array adsorption device for soft noodle adhesive with a width of no more than 2 mm provided in this embodiment is as follows: Figure 6 As shown, when the object to be attached is arc-shaped, and an arc-shaped adsorption device is used for the automated attachment of a 0.6 mm adhesive ring around a mobile phone screen: Structural parameters: Capillary 1: Made of titanium alloy (TC4) capillary, with an outer diameter of 0.15 mm, a wall thickness of 0.03 mm, an inner diameter of 0.09 mm, and a length of 15 mm.

[0079] The dimensions of the adsorption surface 12 are: width 0.6 mm, length 15 mm, and radius of curvature R=2 mm (consistent with the curvature of the surface of the object to be adhered to).

[0080] Capillary arrangement: 3 capillaries are arranged in the width direction and 75 capillaries are evenly distributed in the length direction. The center-to-center spacing of the array is 0.2 mm, for a total of 225 capillaries.

[0081] Retainer 2: Made of PEEK engineering plastic, CNC machined into an arc shape with a radius of 2 mm. The retainer dimensions are 25 mm long × 8 mm wide × 6 mm thick (center thickness), and the upper surface is machined into a concave arc surface with a radius of 2 mm.

[0082] Fixing method: After the capillary tube is inserted into the embedding hole along an arc trajectory, it is fixed by pouring in low-temperature curing epoxy resin. After curing, it is precisely ground along the arc surface so that the first end face is flush with the arc surface.

[0083] Vacuum connection cavity 3: Located on the side of the retainer plane, with dimensions of 15 mm long × 6 mm wide × 4 mm deep, and has two buffer cavities inside, with a total volume of about 0.4 cm³.

[0084] Vacuum Interface 4: Uses a pneumatic quick-connect fitting with an outer diameter of 4 mm.

[0085] Quick-change interface 5: It adopts a combination structure of trapezoidal dovetail groove 51 and electromagnet 52. The electromagnet is a miniature electromagnet with DC 12V and power 2W, and the attraction force can be adjusted by the current (20-80 N).

[0086] Operating parameters: Vacuum degree: -50 kPa.

[0087] Adsorption time: 0.8 s.

[0088] Pick-up-repost cycle: 3 seconds.

[0089] Moving speed: 0.8 m / s, acceleration 4 g (circular arc mounting has relatively low speed requirements and focuses more on accuracy).

[0090] Application scenarios and effects: The device in this embodiment is used for applying adhesive to the edge of a foldable screen phone. The adhesive strip being applied is a 0.6 mm wide × 0.2 mm thick × 12 mm long polyurethane soft strip, which needs to be applied to the curved edge surface of the screen with a radius of curvature R = 2 mm.

[0091] Because the retainer is pre-designed with a radius of 2 mm, after the adhesive strip is absorbed, it naturally bends into the same arc as the surface to be applied. During application, the device approaches the surface perpendicularly along the normal direction, and the adhesive strip contacts and adheres to the surface simultaneously, eliminating the need for rolling or segmented application.

[0092] Tested on 100 samples, the adhesive strip after transfer adhered perfectly to the curved surface with no visible air bubbles (observed at 20x magnification), and the adhesion accuracy was ±0.02 mm. Compared with the flat suction cup + secondary rolling method, this device eliminates the rolling process, reducing cycle time by 40% (from 5 s to 3 s) and the air bubble rate from 1.5% to 0%. Example 4:

[0093] like Figure 1-9 As shown, the capillary end-face array adsorption device for soft noodle adhesive with a width of no more than 2 mm provided in this embodiment is as follows: Figure 8 As shown, when the object to be attached has an irregular shape, an irregular shape adsorption device is used for the automated attachment of the nose pad foam for AR glasses: Structural parameters: Capillary tube 1: Made of 304 stainless steel capillary tube, with an outer diameter of 0.25 mm, a wall thickness of 0.05 mm, an inner diameter of 0.15 mm, and a length of 18 mm.

[0094] Adsorption surface 12 dimensions: width 1 mm, length 30 mm, with a wavy outline (processed according to the CAD drawings provided by the customer, including 3 peaks and 2 troughs, peak height 2 mm, trough depth 1.5 mm).

[0095] Capillary arrangement: 4 capillaries are arranged in the width direction, 150 capillaries are evenly distributed along the wavy contour in the length direction, the center spacing of the array is 0.2 mm, and a total of 600 capillaries are arranged.

[0096] Body 2: Made of 7075 aluminum alloy, machined into a wavy irregular shape by 5-axis CNC, and anodized on the surface.

[0097] Fixing method: Laser spot welding is used (YAG laser welding, power 200 W, weld diameter 0.3 mm). The advantage of laser spot welding is that it does not introduce adhesive and is suitable for high-temperature applications (operating temperature up to 200℃). After welding, the first end face is ground along the irregular contour using a precision grinding machine.

[0098] Vacuum connection cavity 3: Located on the back of the retainer, its shape matches the wave profile, and it has 4 buffer cavities inside with a total volume of about 1 cm³.

[0099] Vacuum interface 4: Uses an M5×0.8 threaded quick-connect connector.

[0100] Quick-change interface 5: adopts a combination structure of T-shaped dovetail groove (51) + permanent magnet (52), with the same configuration as in Example 1.

[0101] Operating parameters: Vacuum degree: -60 kPa.

[0102] Adsorption time: 0.6 s.

[0103] Pick-up-and-post cycle: 2.5 seconds.

[0104] Movement speed: 1.0 m / s, acceleration: 5 g.

[0105] Application scenarios and effects: The device in this embodiment is used for the adhesive application of nose pad foam to an AR glasses manufacturer. The adhesive strip being applied is a 1 mm wide × 0.4 mm thick × 28 mm long polyurethane foam, which needs to be applied to the wavy curved surface of the nose pad (this curved surface is designed to increase friction and comfort).

[0106] Because the retainer is processed into a wavy shape that perfectly matches the curvature of the nose pad, the adhesive strip naturally forms a wavy shape after being absorbed. During application, the wavy adhesive strip adheres perfectly to the curvature of the nose pad in one go, without any misalignment or wrinkles.

[0107] After the device was applied to the production line, the bonding yield increased from 95% (flat suction cup + manual bonding) to 99.5%. The bonded products passed the drop test (free fall from a height of 1.2 m, 10 times), and the adhesive strips did not fall off or shift. Example 5:

[0108] like Figure 1-9 As shown, the capillary end-face array adsorption device for soft noodle adhesive strips with a width of no more than 2mm provided in this embodiment is useful when using a large-area adsorption device for automated application of buffer adhesive for tablet computer screens: Structural parameters: Capillary tube 1: Made of 304 stainless steel capillary tube, with an outer diameter of 0.2 mm, a wall thickness of 0.04 mm, an inner diameter of 0.12 mm, and a length of 25 mm.

[0109] Adsorption surface 12 dimensions: width 1 mm, length 100 mm.

[0110] Capillary arrangement: 5 capillaries are arranged in the width direction and 500 capillaries are evenly distributed in the length direction. The center-to-center spacing of the array is 0.2 mm, for a total of 2500 capillaries.

[0111] Holder 2: Made of 6061 aluminum alloy, 110 mm in length, 12 mm in width, and 10 mm in thickness.

[0112] Fixing method: Low-temperature curing epoxy resin injection fixation.

[0113] Vacuum connection cavity 3: Located on the back of the holder, it measures 100 mm long × 10 mm wide × 6 mm deep, and contains 5 buffer cavities with a total volume of approximately 6 cm³. To ensure uniform vacuum distribution during large-area adsorption, the buffer cavities adopt a grid-like layout, and the cavities are interconnected.

[0114] Vacuum Interface 4: It adopts two parallel M5×0.8 threaded quick-connect connectors to connect to dual vacuum sources to ensure sufficient vacuum flow.

[0115] Quick-change interface 5: It adopts a combination structure of reinforced T-shaped dovetail groove and 6 permanent magnets, with a total adsorption force of about 300 N, ensuring stable installation of large-area devices.

[0116] Vacuum sensor 6: Installed on the vacuum connection cavity, it monitors the vacuum level in real time. An alarm is triggered when the vacuum level is <-40 kPa or the fluctuation is >10%.

[0117] Operating parameters: Vacuum level: -70 kPa (dual vacuum source, total flow rate 40 L / min).

[0118] Adsorption time: 1.2 s (large-area adsorption requires a longer time to establish a vacuum).

[0119] Pick-up-repost cycle: 4 seconds.

[0120] Movement speed: 1.0 m / s, acceleration: 5 g.

[0121] Application scenarios and effects: The device in this embodiment is used for attaching screen cushioning adhesive to a tablet computer. The adhesive strip being adhered to is a soft silicone strip that is 0.8 mm wide × 0.3 mm thick × 95 mm long.

[0122] With an adsorption surface as long as 100 mm, uniformity of adsorption force distribution is crucial. By optimizing the layout of the buffer cavity (grid-like, multi-connected) and using a dual-channel vacuum source, the measured difference in vacuum level at different locations was <3% (measured at 25 points, with a vacuum level range of -68 to -70 kPa).

[0123] The device ran continuously for 8 hours, completing 8000 pick-up-and-place operations with a 99.6% adsorption success rate and no flyaway phenomenon. The adsorption offset of 50 samples was measured, with an average offset of 0.018 mm and a maximum offset of 0.025 mm. The 95 mm long adhesive strip remained straight without bending or deformation. Example 6:

[0124] like Figure 1-9 As shown, the capillary end-face array adsorption device for soft noodle adhesive with a width of no more than 2mm provided in this embodiment has the following replaceable maintenance function: After one month of continuous use in Example 2, an inspection revealed a trace amount of adhesive residue (approximately 0.05 mm²) on the end face of capillary No. 158. Even after wiping with alcohol, there were still slight signs of blockage (vacuum degree decreased by 15%).

[0125] Maintenance steps: 1. Disassemble the device and mark the position of capillary tube number 158 with a marker.

[0126] 2. Using a micro drill bit (0.22 mm in diameter), align the back of the holder with the second end of capillary #158 and gently drill in to break the epoxy resin fixing layer.

[0127] 3. Hold the second end of the capillary tube with tweezers and pull it out gently (pull-out force about 2 N).

[0128] 4. Use a 0.21 mm diameter micro reamer to clean the residual epoxy resin inside the embedded hole.

[0129] 5. Insert a new capillary tube (of the same specifications) and align it flush with the first end face.

[0130] 6. Fix with low-temperature curing epoxy resin, and after curing, use a precision grinder to micro-grind (remove <0.1mm) to make the end face of the new capillary flush with the surrounding area.

[0131] The entire replacement process took approximately 30 minutes (including a 2-hour curing time, during which a backup device can be used). Post-replacement testing showed that the vacuum level of capillary tube #158 returned to normal, consistent with the surrounding capillary tubes. The device continued to be used for two months without any further blockages.

[0132] This case demonstrates that the device has the maintenance advantage of individual capillary tube replacement, avoiding the high cost of scrapping the entire reel. Example 7:

[0133] The capillary end-face array adsorption device for soft noodle adhesive with a width of no more than 2mm provided in this embodiment has the following implementation regarding the replacement speed and reliability of its quick-change interface: Test object: Device of Example 2 (dovetail groove + permanent magnet quick-change interface).

[0134] Test method: 1. A skilled operator shall conduct 10 disassembly and assembly tests and record the time for each disassembly and assembly.

[0135] 2. Disassembly and assembly steps: Disconnect the vacuum line → Release the magnetic attraction (manually pry it open) → Slide out of the dovetail groove → Slide into the new device's dovetail groove → Magnetic positioning → Connect the vacuum line.

[0136] Test results: Disassembly time: Average 1.8 minutes (range 1.5-2.2 minutes).

[0137] Installation time: Average 2.5 minutes (range 2.0-3.0 minutes).

[0138] Total replacement time: average 4.3 minutes (range 3.8-4.8 minutes), meeting the design target of <5 minutes.

[0139] Reliability testing: After 100 disassembly and assembly cycles, there was no obvious wear on the dovetail groove and magnetic structure.

[0140] Measurement of magnetic attraction force decay: initial 200 N, 198 N after 100 cycles, decay of 1%, which is negligible.

[0141] The position repeatability accuracy of the measuring device after installation is ±0.015 mm (measured in the robot coordinate system), which meets the process requirements. Example 8:

[0142] The capillary end-face array adsorption device for soft noodle adhesive with a width of no more than 2mm provided in this embodiment compares the performance of capillary tubes of different materials as follows: Test conditions: Same structure (refer to Example 1), only the capillary material is changed.

[0143] Material 1: 304 stainless steel Advantages: Low cost (about 2 yuan per piece), high strength (tensile strength 520 MPa), and good corrosion resistance.

[0144] Disadvantages: It is relatively heavy (density 7.9 g / cm³), making it unsuitable for high-speed, lightweight applications.

[0145] Applicable scenarios: general scenarios, with the highest cost performance.

[0146] Material 2: Titanium alloy (TC4) Advantages: Lightweight (density 4.5 g / cm³), high strength (tensile strength 880 MPa), and good biocompatibility.

[0147] Disadvantages: High cost (about 8 yuan per piece) and difficult to process.

[0148] Applicable scenarios: High-end applications such as high speed, lightweight, and medical devices.

[0149] Material 3: Aluminum alloy (6061) Advantages: Extremely lightweight (density 2.7 g / cm³), moderate cost (about 3 yuan per piece).

[0150] Disadvantages: Low strength (tensile strength 310 MPa), not resistant to strong acids and alkalis.

[0151] Applicable scenarios: Lightweight, non-corrosive environments.

[0152] Test conclusion: For surface mount technology (SMT) of consumer electronics such as mobile phones and tablets, 304 stainless steel capillary tubes are recommended due to their optimal cost-effectiveness. For high-speed, lightweight applications such as AR and VR, titanium alloy capillary tubes are recommended. Example 9:

[0153] This embodiment provides a capillary end-face array adsorption device for soft noodle adhesive with a width of no more than 2 mm. The effect of different vacuum levels on the adsorption effect was tested, and the results are as follows: Test subject: The device of Example 2, which adsorbs a soft silicone noodle with a width of 0.8 mm, a thickness of 0.3 mm, and a length of 45 mm.

[0154] Test method: In the range of -30 kPa to -80 kPa, 100 adsorption tests were performed every -10 kPa, and the adsorption success rate, adsorption time, and flyaway rate were recorded.

[0155] Test results: -30 85.2% 1.2 5.8 -40 93.5% 0.8 2.3 -50 98.1% 0.6 0.8 -60 99.3% 0.5 0.3 -65 99.7% 0.5 0.2 -70 99.8% 0.5 0.2 -80 99.8% 0.5 0.2 analyze: When the vacuum level is less than -40 kPa, the adsorption success rate and stability are insufficient.

[0156] It performs best in the vacuum range of -60 to -70 kPa.

[0157] When the vacuum level is greater than -70 kPa, the performance improvement is not significant, but the energy consumption increases.

[0158] Recommended vacuum level: -60 to -70 kPa, balancing performance and energy consumption. The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A capillary end-face array adsorption device for soft noodle adhesive with a width not greater than 2 mm, comprising a fixing device (7), characterized in that: The fixing device (7) has a retainer (2) at the bottom. The retainer (2) has a capillary tube (1) arranged in parallel inside. The adsorption ends of the capillary tube (1), i.e. the first end face (11), are arranged flush and together form a continuous adsorption surface (12). The width of the continuous adsorption surface (12) is ≤2mm. The second end face (13) of the capillary (1) is connected to the vacuum connection cavity (3), and the vacuum connection cavity (3) is connected to the external vacuum interface (4), which is used to connect to an external vacuum source.

2. The capillary end-face array adsorption device for soft noodle adhesive with a width not greater than 2 mm according to claim 1, characterized in that: The capillary (1) is a metal capillary with an outer diameter of 0.1–0.3 mm and a wall thickness of 0.03–0.05 mm. The capillary (1) is arranged in an array in the holder (2), with a center-to-center distance of 0.15–0.5 mm between adjacent capillary tubes.

3. The capillary end-face array adsorption device for soft noodle adhesive with a width not greater than 2 mm according to claim 1 or 2, characterized in that: The capillary tube (1) is fixed in the retainer (2) by low-temperature curing epoxy resin or laser spot welding, and a single capillary tube (1) can be replaced independently.

4. The capillary end-face array adsorption device for soft noodle adhesive with a width not greater than 2 mm according to claim 1 or 2, characterized in that: The capillary (1) is made of stainless steel, titanium alloy or aluminum alloy, and the retainer (2) is made of aluminum alloy, engineering plastic or stainless steel.

5. The capillary end-face array adsorption device for soft noodle adhesive with a width not greater than 2 mm according to claim 1, characterized in that: The retainer (2) is a detachable structure, and a quick-change interface (5) is provided on one side of the second end face (13). The quick-change interface (5) includes one or more of a dovetail groove structure (51) and a magnetic suction structure (52).

6. The capillary end-face array adsorption device for soft noodle adhesive with a width not greater than 2 mm according to claim 5, characterized in that: The dovetail groove structure (51) adopts a T-shaped groove or a trapezoidal groove, and the magnetic attraction structure (52) adopts a permanent magnet or an electromagnet.

7. The capillary end-face array adsorption device for soft noodle adhesive with a width not greater than 2 mm according to claim 1, characterized in that: The width of the continuous adsorption surface (12) is 0.5–1 mm and the length is 10–100 mm.

8. The capillary end-face array adsorption device for soft noodle adhesive with a width not greater than 2 mm according to claim 1, characterized in that: The retainer (2) can be processed into a corresponding planar, arc-shaped or irregular contour according to the shape of the soft noodle adhesive to be adsorbed, so that the adsorption surface (12) is fully attached to the soft noodle adhesive.

9. The capillary end-face array adsorption device for soft noodle adhesive with a width of no more than 2 mm according to claim 1, characterized in that: The vacuum connection cavity (3) is equipped with a buffer cavity to balance the vacuum level of each capillary, so that the difference in vacuum level is ≤5%.

10. The capillary end-face array adsorption device for soft noodle adhesive with a width not greater than 2 mm according to claim 1 or 9, characterized in that: The vacuum connection cavity (3) is equipped with a vacuum sensor (6) for real-time monitoring of the vacuum level and issuing an alarm signal when the vacuum level is abnormal.

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