Jig for traceless adsorption of UTG glass

Abstract

The invention discloses a jig for traceless adsorption of UTG glass, and belongs to the technical field of auxiliary jigs for UTG (ultra-thin flexible glass) processing. An ATPU buffer adsorption layer is installed at the lower section end of a jig bottom plate, a gauze assembly is installed at the lower end of the ATPU buffer adsorption layer, vacuum adsorption holes and vacuum channels are distributed in the jig bottom plate in a staggered mode, vent holes are distributed in the ATPU buffer adsorption layer, and the vacuum adsorption holes are communicated with the vacuum channels. The gauze layer uniformly disperses adsorption pressure through fine grids, marks on the surface of the glass due to local excessive deformation of the ATPU material are effectively avoided, actual measurement verifies that no visible adsorption marks or scratches exist on the surface of the UTG glass after adsorption, light transmittance and surface flatness are not affected, the strict requirements of high-end electronic products for the appearance of the glass are completely met, and the glass has a good application prospect. A three-layer stacked integrated structure is adopted, no complex nested or composite structure exists, the machining process of each layer of assembly is simple, the assembly process is convenient and fast, the design difficulty and manufacturing complexity of the jig are greatly reduced, and batch production is convenient to achieve.

Description

Technical Field

[0001] This invention relates to a fixture for UTG glass, and more particularly to a fixture for non-marking adsorption of UTG glass, belonging to the technical field of auxiliary fixtures for UTG (ultra-thin flexible glass) processing. Background Technology

[0002] With its core characteristics of being ultra-thin, highly flexible, and having high light transmittance, UTG glass has become a key component in high-end electronic products such as foldable screen terminals and wearable devices. Its processing precision directly determines the performance and quality of the final products.

[0003] In the core processing steps of UTG glass, such as cutting, grinding, and coating, fixtures are needed to stably adsorb and fix the glass to ensure positional accuracy during processing, thereby improving product yield.

[0004] Current UTG glass traceless adsorption fixtures in the industry have significant shortcomings in practical applications, making it difficult to meet the needs of large-scale, high-precision processing. Specific problems are as follows: Traditional silicone suction cup fixtures: The internal aperture of the silicone suction cup is relatively large (about 2mm). When it comes into contact with the UTG glass surface to form a vacuum environment, it is easy for the glass to be deformed by suction due to negative pressure. This not only leaves obvious suction marks on the glass surface, affecting the appearance quality of the product, but may also cause irreversible damage to the ultra-thin UTG glass due to local stress concentration.

[0005] Breathable paper composite fixture: Although it can fix UTG glass, it requires an additional breathable paper structure, which significantly increases material costs. In addition, the breathable paper has low air permeability, resulting in a long adsorption process and severely restricting the production efficiency of processing equipment.

[0006] Therefore, developing a UTG glass fixture with a simple structure, low manufacturing cost, fast vacuum response speed, and stable traceless adsorption capability has become an urgent need to solve the current industry pain points and promote the development of the UTG glass processing industry. Summary of the Invention

[0007] The main purpose of this invention is to overcome the problem that when the silicone suction cup has a large internal aperture (about 2mm) and forms a vacuum environment with the UTG glass surface, it is easy for the glass to be deformed by adsorption due to negative pressure. This not only leaves obvious adsorption marks on the glass surface, affecting the appearance quality of the product, but may also cause irreversible damage to the ultra-thin UTG glass due to local stress concentration.

[0008] Breathable paper composite fixture: Although it can fix UTG glass, it requires the additional laying of breathable paper structure, which significantly increases the material cost. On the other hand, the low air permeability of the breathable paper leads to a long adsorption process, which seriously restricts the production efficiency of processing equipment. To provide an economical, efficient and fast adsorption fixture with stable and reliable fixation, and a traceless adsorption fixture, we can meet the industrial needs of large-scale and high-precision processing of UTG glass.

[0009] The objective of this invention can be achieved by adopting the following technical solution: A fixture for non-marking adsorption of UTG glass, including a fixture base plate for positioning; An ATPU buffer adsorption layer is installed at the lower end of the fixture base plate, and a mesh assembly is installed at the lower end of the ATPU buffer adsorption layer. The base plate of the fixture has vacuum adsorption holes and vacuum channels distributed in an alternating pattern. The ATPU buffer adsorption layer has ventilation holes distributed on it.

[0010] Preferably, the fixture base plate is made of lightweight aluminum alloy, has a rectangular plate structure, and has a thickness of 10-15mm.

[0011] Preferably, the diameter of the vent is 2-4 mm, and the spacing between each group of vents is 40-50 mm.

[0012] Preferably, each group on the ATPU buffer adsorption layer is connected in a one-to-one correspondence.

[0013] Preferably, the hardness of the ATPU buffer adsorption layer is 25-35A, the thickness of the ATPU buffer adsorption layer is 5-10mm, and the diameter of the vent hole is 1-2mm.

[0014] Preferably, the mesh assembly has an aperture of 0.05 mm and a wire diameter of 0.034 mm.

[0015] Preferably, the mesh assembly is the same size as the fixture base plate and the ATPU buffer adsorption layer.

[0016] Beneficial technical effects of the present invention: The fixture for adsorbing UTG glass without leaving marks provided by the present invention relies on the synergistic effect of the mesh layer and the ATPU buffer adsorption layer. The mesh layer evenly disperses the adsorption pressure through the fine grid, effectively avoiding the ATPU material from leaving marks on the glass surface due to excessive local deformation. Actual testing has verified that after adsorption, the UTG glass surface shows no visible adsorption marks or scratches, and its light transmittance and surface flatness are unaffected, fully meeting the stringent requirements of high-end electronic products for glass appearance.

[0017] It adopts a three-layer integrated structure without complex nesting or composite structures. The processing technology of each layer component is simple and the assembly process is convenient, which greatly reduces the design difficulty and manufacturing complexity of the fixture and facilitates mass production.

[0018] It uses conventional industrial materials such as aluminum alloy, ATPU, and polyester fiber mesh, resulting in low material procurement costs. Meanwhile, the processing does not require special equipment, further reducing production input. Compared with existing high-end traceless adsorption fixtures, the manufacturing cost of this fixture is reduced by 40%-60%, significantly improving the product's cost-effectiveness and making it easier to achieve industrialization and promotion.

[0019] Each layer of components is connected using high-temperature resistant and environmentally friendly adhesives, screws, and other methods, resulting in a high degree of connection strength. The mesh layer is embedded and fixed, making it less likely to fall off or deform during long-term use; ATPU material has excellent wear resistance and aging resistance. After 10,000 adsorption-release cycle tests, the adsorption performance of the fixture showed no significant decline, and it has a long service life, which can meet the needs of long-term continuous production. Attached Figure Description

[0020] Figure 1 An exploded perspective view of the overall three-dimensional structure of a preferred embodiment of the fixture for non-marking adsorption of UTG glass according to the present invention; Figure 2 This is a schematic diagram of the fixture base plate and ATPU buffer adsorption layer structure of a preferred embodiment of the fixture for non-marking adsorption of UTG glass according to the present invention; Figure 3 This is a schematic diagram of the mesh assembly connection structure of a preferred embodiment of the fixture for non-marking adsorption of UTG glass according to the present invention.

[0021] In the diagram: 1. Fixture base plate; 101. Vacuum adsorption hole; 102. Vacuum channel; 2. ATPU buffer and adsorption layer; 201. Breathable pores; 3. Mesh assembly. Detailed Implementation

[0022] To enable those skilled in the art to understand the technical solution of the present invention more clearly, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0023] Example like Figure 1 , Figure 2 and Figure 3 As shown, the fixture for non-marking adsorption of UTG glass provided in this embodiment includes a fixture base plate 1 for limiting position; An ATPU buffer adsorption layer 2 is installed at the lower end of the fixture base plate 1, and a mesh assembly 3 is installed at the lower end of the ATPU buffer adsorption layer 2. Vacuum adsorption holes 101 and vacuum channels 102 are staggered on the base plate 1 of the fixture; The ATPU buffer adsorption layer 2 has ventilation holes 201 distributed on it.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, the fixture base plate 1 is made of high-strength lightweight aluminum alloy. The overall design is a rectangular plate structure with a thickness controlled at 10-15mm. The size can be flexibly adapted and adjusted according to the specifications of the UTG glass to be processed, taking into account both structural strength and lightweight requirements.

[0025] A plurality of vacuum adsorption holes 101 are evenly distributed on the upper surface of the fixture base plate 1. The diameter of the adsorption hole is 2-4mm, and the spacing between adjacent adsorption holes is set to 40-50mm to ensure that the adsorption force is evenly distributed on the surface of the base plate. The base plate has a main vacuum channel 102 and a branch vacuum channel 101 inside. The branch vacuum channel 101 is connected to each vacuum adsorption hole 101 in a one-to-one correspondence. One end of the main vacuum channel 102 is connected to all the branch vacuum channels 102, and the other end extends to the side wall of the fixture base plate 1 to form a vacuum interface. The vacuum interface is connected to an external vacuum device through a sealing joint to realize the rapid switching on and off of the vacuum.

[0026] The back of the fixture base plate 1 is provided with positioning pin holes and screw holes for precise positioning and connection with the processing equipment, ensuring the positional stability of the fixture during the processing and avoiding the impact of positioning deviation on processing accuracy.

[0027] The ATPU buffer adsorption layer 2 is made of highly elastic, low-hardness ATPU material with a Shore hardness of 25-35A. It has excellent buffering and sealing performance, which can not only avoid damage to the UTG glass caused by rigid contact, but also ensure the sealing of the vacuum environment.

[0028] The ATPU buffer adsorption layer has a sheet-like structure with dimensions that are completely consistent with the upper surface of the fixture base plate 1. The thickness is 5-10mm, corresponding to the position of the vacuum adsorption hole 101 on the fixture base plate 1. The ATPU buffer adsorption layer 2 has a through-hole vent 201 with a diameter of 1-2mm to ensure that the vacuum negative pressure can be smoothly transmitted to the upper structure. The ATPU buffer adsorption layer is tightly bonded to the upper surface of the fixture base plate 1 using high-temperature resistant, strong, and environmentally friendly adhesive, and completely covers all vacuum adsorption holes 101, ensuring the firmness and sealing of the interlayer connection.

[0029] By utilizing the elastic deformation properties of ATPU material, a tight fit can be achieved with the surface of UTG glass, while dispersing local pressure and avoiding damage to the glass caused by concentrated pressure.

[0030] The mesh assembly 3 adopts a combination structure of "metal mesh frame + fine mesh". The mesh and the frame are fixed together by a professional mesh stretching mechanism to form an integrated mesh assembly 3. The mesh has a mesh aperture of 0.05mm and a wire diameter of 0.034mm, which has both good rigidity and breathability, and can support UTG glass without affecting vacuum flow.

[0031] The size of the mesh layer is the same as that of the ATPU buffer adsorption layer 2. It is installed on the upper surface of the ATPU buffer adsorption layer by a mesh frame embedded fixing method. The edge of the mesh layer is flush with the edge of the fixture base plate 1. The mesh layer and the ATPU buffer adsorption layer 2 are fixed together by a mesh frame to ensure that the mesh layer is flat and wrinkle-free during use, while not hindering the flow of vacuum between the layers.

[0032] The key structure for achieving traceless adsorption is to disperse the contact pressure between the UTG glass and the ATPU buffer adsorption layer 2 through a fine mesh structure, thereby preventing the ATPU material from leaving traces on the UTG glass surface due to local deformation caused by adsorption.

[0033] The fixture base plate 1 is made of 6063 aluminum alloy (which combines high strength and good machinability), and its dimensions are set at 720mm×620mm×20mm. 255 vacuum adsorption holes are evenly opened on the upper surface, with a hole diameter of 4mm and a spacing of 40mm between adjacent adsorption holes (to ensure uniform adsorption coverage). The internal main vacuum channel has a diameter of 10mm, and the branch vacuum channels have a diameter of 3mm. The vacuum interface adopts the G1 / 4 standard interface (compatible with conventional vacuum equipment), and four φ4mm positioning pin holes are set on the edge of the base plate (to achieve precise positioning with the equipment).

[0034] The ATPU buffer adsorption layer 2 is made of ATPU material with a Shore hardness of 30A (balancing elasticity and support). Its size is consistent with the upper surface of the jig base plate, which is 720mm×620mm×10mm. Corresponding to the 255 vacuum adsorption holes of the jig base plate, the ATPU layer has 255 φ2mm ventilation holes. It is bonded and fixed to the jig base plate with epoxy resin environmentally friendly adhesive (high temperature resistance and high bonding strength).

[0035] The mesh component 3 uses polyester fiber material (wear-resistant and breathable), with a mesh size of 0.05mm, a wire diameter of 0.034mm, and a mesh size of 722mm×622mm (with installation allowance). It is fixed by a metal mesh frame (made of aluminum alloy). The mesh frame is connected to the fixture base plate by screws on the side to ensure that the mesh layer and the ATPU buffer adsorption layer are tightly attached and flat without wrinkles.

[0036] The surface of the 6063 aluminum alloy base plate is anodized (to enhance surface wear resistance and corrosion resistance, and extend service life). The surface of the base plate is wiped with alcohol to remove oil, dust and other impurities, ensuring that the bonding surface is clean and dry to avoid affecting the bonding quality.

[0037] Apply epoxy resin environmentally friendly adhesive evenly to the upper surface of the fixture base plate, with the coating thickness controlled at 0.1mm (to ensure uniform bonding and not block the adsorption pores). Precisely align the ATPU buffer adsorption layer with the base plate, ensuring that the vent holes of the ATPU layer correspond one-to-one with the adsorption pores of the base plate. After alignment, apply a uniform pressure of 5N to ensure that the ATPU layer and the base plate are tightly bonded. Allow it to stand and cure at room temperature for 24 hours to ensure a strong bond.

[0038] The mesh assembly 3 is a metal mesh frame with the mesh pre-fixed by a mesh stretching mechanism, which is then connected to the fixture base plate by side screws. The position of the mesh frame is adjusted so that the mesh layer and the ATPU buffer adsorption layer are in close contact without wrinkles. The fixing screws are then tightened to complete the overall assembly of the fixture.

[0039] Secure the assembled fixture to the designated position on the UTG processing equipment with screws to ensure accurate fixture positioning. Connect the fixture's G1 / 4 vacuum interface to an external vacuum source, setting the vacuum level of the vacuum source to -0.07~-0.09MPa (balancing adsorption force and glass protection).

[0040] Place the UTG glass to be processed, which is smaller than 720mm×620mm, stably on the upper surface of the mesh layer, adjust the position of the glass to the required processing coordinates, start the vacuum source, and complete the vacuum establishment within 0.2 seconds to achieve the adsorption and fixation of the glass.

[0041] Start the processing equipment and complete the UTG glass processing steps according to the preset process. After processing, turn off the vacuum source, complete the vacuum release within 0.2 seconds, and gently remove the glass to complete a single processing.

[0042] After the UTG glass was fixed by adsorption for 24 hours, the glass surface was observed with a high-power microscope (50x magnification). No adsorption marks, indentations or scratches were found. The light transmittance of the glass was no different from that before adsorption (the light transmittance remained above 92%), and the surface flatness error was ≤0.01mm.

[0043] The vacuum pressure gauge and timer are monitored synchronously. The vacuum build-up time (from starting the vacuum source to reaching the set vacuum level) is 0.2 seconds, and the vacuum release time (from turning off the vacuum source to the vacuum level returning to normal pressure) is 0.2 seconds, which is far superior to traditional silicone suction cup fixtures (vacuum build-up time is about 0.5-1 seconds) and breathable paper composite fixtures (vacuum build-up time is about 3-5 seconds).

[0044] A continuous adsorption-release cycle test was conducted for 10,000 cycles. After the test, each component of the fixture was inspected: the mesh layer was free from peeling, damage or wrinkles, the ATPU buffer adsorption layer was free from aging, cracking or deformation, the vacuum channel was free from leakage, and the overall performance of the fixture was stable.

[0045] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A fixture for non-marking adsorption of UTG glass, including a fixture base plate (1) for positioning; Its features are: An ATPU buffer adsorption layer (2) is installed at the lower end of the fixture base plate (1), and a mesh assembly (3) is installed at the lower end of the ATPU buffer adsorption layer (2). The fixture base plate (1) has vacuum adsorption holes (101) and vacuum channels (102) distributed alternately. The ATPU buffer adsorption layer (2) has ventilation holes (201) distributed on it.

2. The fixture for seamless adsorption of UTG glass according to claim 1, characterized in that: The fixture base plate (1) is made of lightweight aluminum alloy and has a rectangular plate structure. The thickness of the fixture base plate (1) is 10-15mm.

3. The fixture for seamless adsorption of UTG glass according to claim 1, characterized in that: The diameter of the vent (201) is 2-4 mm, and the spacing between each group of vents (201) is 40-50 mm.

4. The fixture for seamless adsorption of UTG glass according to claim 2, characterized in that: Each group (202) on the ATPU buffer adsorption layer (2) is connected in a one-to-one correspondence.

5. The fixture for seamless adsorption of UTG glass according to claim 4, characterized in that: The ATPU buffer adsorption layer (2) has a hardness of 25-35A, a thickness of 5-10mm, and a diameter of 1-2mm for the vent hole (201).

6. The fixture for seamless adsorption of UTG glass according to claim 1, characterized in that: The mesh component (3) has an aperture of 0.05 mm and a wire diameter of 0.034 mm.

7. The fixture for seamless adsorption of UTG glass according to claim 6, characterized in that: The mesh assembly (3) is the same size as the fixture base plate (1) and the ATPU buffer adsorption layer (2).

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