Pressure holding device

Abstract

The present invention discloses a pressure-maintaining device, which belongs to the technical field of pressure-maintaining equipment. The pressure-maintaining device of the present invention has an airbag sleeved on the outer side of a pressure roller, and the airbag includes an air inlet interface, which is used to fill the airbag with gas. The outer peripheral surface of the airbag is provided with a plurality of air holes, and the gas in the airbag can be discharged from the air holes. When the product and the adhesive attached to the product are pressure-maintained, on the one hand, foreign matter on the surface of the adhesive can be removed to avoid pressure damage to the product, which is beneficial to improving the product yield; on the other hand, the air pressure generated by the gas discharged through the air holes can compensate for the flatness fluctuation of the product surface, and even if the surface flatness of the product varies greatly, the problem of false sticking can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure-maintaining equipment, and in particular to a pressure-maintaining device. Background Art

[0002] Organic Light-Emitting Diode (OLED), also known as organic electroluminescence display or organic light-emitting semiconductor (OLED), refers to the phenomenon that organic semiconductor materials and luminescent materials emit light through carrier injection and recombination under the drive of an electric field.

[0003] At present, in the process of attaching composite tape to the hyperbolic flexible OLED module, in order to ensure the attachment quality of the composite tape, the composite tape needs to be pressure-maintained. There are currently two commonly used pressure-maintaining methods: the first is to use a pressure roller to maintain pressure on both the flat area and the curved area; the second is to use a pressure roller to maintain pressure on the flat area and contoured silicone to maintain pressure on the curved area. The above two pressure-maintaining methods have the following problems:

[0004] 1. The pressure roller is usually made of hard material such as tungsten steel (not easy to deform, ensuring service life). However, due to the hot bending forming process of the hyperbolic cover plate, the flatness of the cover plate surface will fluctuate greatly. When the pressure roller rolls on an area with a large difference in flatness, it is easy to produce false adhesion.

[0005] 2. If there are foreign particles on the surface of the composite tape during lamination, the pressure roller and the contoured silicone pressure-maintaining device may easily cause damage to the OLED device, thus affecting the production yield of the product. Summary of the invention

[0006] The object of the present invention is to provide a pressure-maintaining device which can improve the pressure-maintaining effect and avoid the occurrence of false adhesion and pressure injuries.

[0007] In order to achieve the above objectives, the following technical solutions are provided:

[0008] The pressure holding device comprises:

[0009] Pressing roller;

[0010] An airbag is sleeved on the outer side of the pressure roller, and the airbag includes an air inlet interface, which is used to fill gas into the airbag. The outer peripheral surface of the airbag is provided with a plurality of air holes, and the gas in the airbag can be discharged from the air holes.

[0011] As an optional solution for the pressure-maintaining device, the outer peripheral surface of the airbag is provided with a plurality of air hole groups arranged in sequence along the circumference of the airbag, and each of the air hole groups includes a plurality of the air holes;

[0012] The pores of two adjacent pore groups are staggered.

[0013] As an optional solution of the pressure-maintaining device, the airbag has a first end and a second end opposite to each other along its axial direction;

[0014] The plurality of air holes include a plurality of first oblique blowing air holes located at the first end, wherein the center lines of the first oblique blowing air holes are arranged at an angle to the radial direction of the pressure roller, and the gas in the airbag can be discharged from the first oblique blowing air holes and blown toward the first end.

[0015] As an optional solution for the pressure maintaining device, the plurality of air holes also include a plurality of second oblique blowing air holes located at the second end, and the center lines of the second oblique blowing air holes are arranged at an angle to the radial direction of the pressure roller, so that the gas in the airbag can be discharged from the second oblique blowing air holes and blown toward the second end.

[0016] As an optional solution for the pressure-maintaining device, the plurality of air holes include a plurality of direct-blowing air holes located in the middle of the airbag, and the gas in the airbag can be discharged from the direct-blowing air holes along the radial direction of the pressure roller.

[0017] As an optional solution of the pressure-maintaining device, the gas in the airbag can be discharged from the air holes along the radial direction of the pressure roller.

[0018] As an optional solution for the pressure-maintaining device, the air hole includes an air inlet port located inside the airbag and an air outlet port located outside the airbag, and the caliber of the air inlet port is not less than the caliber of the air outlet port.

[0019] As an optional solution of the pressure-maintaining device, the diameter of the pores is 0.3 mm-0.8 mm; and / or,

[0020] The distance between two adjacent pores is 1 mm to 2 mm.

[0021] As an optional solution of the pressure-maintaining device, the pressure roller includes a pressure-maintaining section;

[0022] Along the axial direction of the pressure roller, the length of the airbag is not less than the length of the pressure maintaining section.

[0023] As an optional solution of the pressure maintaining device, the airbag is made of a flexible material.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The pressure-maintaining device of the present invention has an airbag sleeved on the outer side of the pressure roller. The airbag includes an air inlet interface, which is used to fill gas into the airbag. The outer peripheral surface of the airbag is provided with a plurality of air holes, and the gas in the airbag can be discharged from the air holes. When the product and the adhesive attached to the product are pressure-maintained, on the one hand, foreign matter on the surface of the adhesive can be removed to avoid pressure damage to the product, which is beneficial to improving the product yield; on the other hand, the air pressure generated by the gas discharged through the air holes can compensate for the flatness fluctuation of the product surface. Even if the surface flatness of the product varies greatly, the problem of false sticking can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of a pressure-maintaining device in an embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the coordination relationship between the surface flatness of the product and the pressure-maintaining device when the surface flatness of the product fluctuates in an embodiment of the present invention;

[0028] Figure 3 for Figure 2 The cross-sectional view of the AA surface;

[0029] Figure 4 A diagram showing a layout of air holes in an embodiment of the present invention;

[0030] Figure 5 Schematic diagram of the structure of the first oblique blowing hole, the second oblique blowing hole and the straight blowing hole in an embodiment of the present invention.

[0031] Reference numerals:

[0032] 100, product; 200, adhesive piece;

[0033] 1. Pressing roller; 11. Pressure holding section; 12. Rotating shaft section;

[0034] 2. air bag; 21. air inlet interface; 22. air hole group; 221. air hole; 221a. first oblique blowing air hole; 221b. second oblique blowing air hole; 221c. straight blowing air hole; 23. first end; 24. second end. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] like Figure 1-5 As shown, this embodiment provides a pressure-maintaining device for maintaining pressure on the product 100 and the adhesive member 200 attached to the product 100. In this embodiment, the product 100 is a hyperbolic flexible OLED module, and the adhesive member 200 is a composite tape.

[0043] At present, in the process of attaching composite tape to the flexible OLED module with a hyperbolic surface, in order to ensure the attachment quality of the composite tape, the composite tape needs to be pressure-maintained. There are currently two commonly used pressure-maintaining methods: the first is to use a pressure roller to maintain pressure in both the flat area and the curved area; the second is to use a pressure roller to maintain pressure in the flat area and a contoured silicone to maintain pressure in the curved area. The above two pressure-maintaining methods have the following problems: the pressure roller is usually made of hard materials such as tungsten steel (not easy to deform, ensuring service life), but because the hyperbolic cover plate has added a hot bending molding process, the flatness of the cover plate surface will fluctuate greatly. When the pressure roller rolls on an area with a large difference in flatness, it is easy to produce a false adhesion; at the same time, if foreign particles remain on the surface of the composite tape when it is attached, the pressure roller and contoured silicone pressure maintenance are likely to cause OLED devices to be crushed, affecting the product production yield.

[0044] In order to solve the above problems, the pressure maintaining device of this embodiment includes a pressure roller 1 and an airbag 2. The airbag 2 is sleeved on the outside of the pressure roller 1. The airbag 2 includes an air inlet interface 21. The air inlet interface 21 is used to fill gas into the airbag 2. A plurality of air holes 221 are arranged on the outer surface of the airbag 2, and the gas in the airbag 2 can be discharged from the air holes 221.

[0045] An airbag 2 is sleeved on the outer side of the pressure roller 1. The airbag 2 includes an air inlet interface 21, which is used to fill gas into the airbag 2. A plurality of air holes 221 are arranged on the outer peripheral surface of the airbag 2. The gas in the airbag 2 can be discharged from the air holes 221. When the product 100 and the adhesive 200 attached to the product 100 are pressurized, on the one hand, foreign matter on the surface of the adhesive 200 can be removed to avoid pressure damage to the product 100, which is beneficial to improving the yield of the product 100; on the other hand, the air pressure generated by the gas discharged through the air holes 221 can compensate for the flatness fluctuation of the surface of the product 100. Even if the surface flatness of the product 100 varies greatly, the problem of false sticking can be avoided.

[0046] Optionally, the airbag 2 is made of a flexible material such as silicone, so that the airbag 2 has a certain flexibility. During the pressure holding process, it can further compensate for the flatness fluctuation of the surface of the product 100 and improve the poor adhesion.

[0047] It should be noted that, in the present embodiment, the airbag 2 has a cavity for accommodating gas, and the size of the cavity in the radial direction of the pressure roller 1 is very small. It is sufficient as long as the gas can pass into the cavity so that the gas discharged from the air hole 221 has a certain pressure, promotes the removal of foreign matter, and compensates for the flatness fluctuations on the surface of the product 100.

[0048] Optionally, the outer peripheral surface of the airbag 2 is provided with a plurality of pore groups 22 sequentially arranged along the circumference of the airbag 2, and each pore group 22 includes a plurality of the above-mentioned pores 221; the pores 221 of two adjacent pore groups 22 are staggered. Such an arrangement can avoid the generation of blind spots on the surface of the adhesive member 200, and further, all foreign matter on the surface of the adhesive member 200 can be removed.

[0049] In this embodiment, the airbag 2 has a first end 23 and a second end 24 that are opposite to each other along its axial direction; the plurality of air holes 221 include a plurality of first oblique blowing holes 221a located at the first end 23, and the center lines of the first oblique blowing holes 221a are arranged at an angle to the radial direction of the pressure roller 1. The gas in the airbag 2 can be discharged from the first oblique blowing holes 221a and blown toward the first end 23, thereby blowing foreign matter on the surface of the adhesive 200 away from the adhesive 200 from the first end 23 of the airbag 2, thereby preventing the foreign matter from falling on the adhesive 200 again and requiring repeated removal of the foreign matter.

[0050] Furthermore, the plurality of air holes 221 also include a plurality of second oblique blowing holes 221b located at the second end 24. The center lines of the second oblique blowing holes 221b are arranged at an angle to the radial direction of the pressure roller 1. The gas in the airbag 2 can be discharged from the second oblique blowing holes 221b and blown toward the second end 24, thereby blowing foreign matter on the surface of the adhesive 200 away from the adhesive 200 from the second end 24 of the airbag 2, thereby preventing the foreign matter from falling on the adhesive 200 again and requiring repeated removal of the foreign matter.

[0051] Furthermore, the plurality of air holes 221 include a plurality of direct-blowing air holes 221c located in the middle of the airbag 2. The gas in the airbag 2 can be discharged from the direct-blowing air holes 221c along the radial direction of the pressure roller 1, and foreign matter can be removed along the moving direction of the pressure roller 1. Even if the axial length of the pressure roller 1 is too large, it is difficult to blow foreign matter located in the middle of the adhesive 200 away from both ends of the airbag 2. It can also prevent foreign matter from being sandwiched between the pressure-maintaining device and the adhesive 200, thereby avoiding problems such as crushing injuries.

[0052] Of course, in other embodiments, all the air holes 221 can be set as direct blowing air holes. In other words, the gas in the airbag 2 can be discharged from the air holes 221 along the radial direction of the pressure roller 1, which can also play a role in removing foreign matter, avoiding foreign matter from being sandwiched between the pressure-maintaining device and the adhesive 200, thereby avoiding problems such as pressure injuries. With this arrangement, the air holes 221 are easy to process and have good processability.

[0053] It should be noted that the spacing between two adjacent air holes 221 cannot be too large to avoid forming a blind area on the surface of the adhesive 200, resulting in the inability to remove foreign matter in the blind area. Optionally, the spacing between two adjacent air holes 221 is 1mm-2mm. Exemplarily, the spacing between two adjacent air holes 221 can be any value of 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, and 2mm.

[0054] Optionally, the aperture of the pore 221 is 0.3 mm-0.8 mm, so as to ensure that the gas discharged from the pore 221 has a certain pressure, promote the removal of foreign matter, and compensate for the flatness fluctuation of the surface of the product 100. Exemplarily, the aperture of the pore 221 can be any value of 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, and 0.8 mm.

[0055] Optionally, the air hole 221 includes an air inlet port located inside the airbag 2 and an air outlet port located outside the airbag 2, and the diameter of the air inlet port is not less than the diameter of the air outlet port. With such a configuration, the air hole 221 has a pressurizing effect, which can increase the pressure of the gas discharged from the air hole 221, further ensuring that foreign matter can be completely removed.

[0056] It should be noted that, for the air hole 221 whose caliber of the air inlet port is different from that of the air outlet port, it is only necessary to control the caliber of the air outlet port to be 0.3mm-0.8mm. For example, the caliber of the air outlet port can be any value among 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, and 0.8mm.

[0057] Optionally, the pressure roller 1 includes a pressure-maintaining section 11 and a rotating shaft section 12 respectively connected to both ends of the pressure-maintaining section 11. The two rotating shaft sections 12 are used to be rotatably connected to an external device. In other words, the pressure-maintaining section 11 is the part where the pressure roller 1 provides pressure to the adhesive 200 and the product 100 for pressure maintenance. Furthermore, along the axial direction of the pressure roller 1, the length of the airbag 2 is not less than the length of the pressure-maintaining section 11, so that the airbag 2 can completely cover the pressure-maintaining section 11, avoiding direct contact between the pressure-maintaining section 11 and the adhesive 200, thereby ensuring the pressure-maintaining effect.

[0058] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A pressure-maintaining device, characterized in that: include: Pressing roller (1); An airbag (2), wherein the airbag (2) is sleeved on the outer side of the pressure roller (1), and the airbag (2) comprises an air inlet interface (21), wherein the air inlet interface (21) is used to fill the airbag (2) with gas, and the outer peripheral surface of the airbag (2) is provided with a plurality of air holes (221), and the gas in the airbag (2) can be discharged from the air holes (221).

2. The pressure maintaining device according to claim 1, characterized in that: The outer peripheral surface of the airbag (2) is provided with a plurality of air hole groups (22) arranged in sequence along the circumference of the airbag (2), and each of the air hole groups (22) includes a plurality of air holes (221); The air holes (221) of two adjacent air hole groups (22) are arranged in a staggered manner.

3. The pressure maintaining device according to claim 1, characterized in that: The airbag (2) has a first end (23) and a second end (24) which are opposite to each other along its axial direction; The plurality of air holes (221) include a plurality of first oblique blowing air holes (221a) located at the first end (23), wherein the center lines of the first oblique blowing air holes (221a) are arranged at an angle to the radial direction of the pressure roller (1), and the gas in the air bag (2) can be discharged from the first oblique blowing air holes (221a) and blown toward the first end (23).

4. The pressure maintaining device according to claim 3, characterized in that: The plurality of air holes (221) further include a plurality of second oblique blowing air holes (221b) located at the second end (24); the center lines of the second oblique blowing air holes (221b) are arranged at an angle to the radial direction of the pressure roller (1); the gas in the air bag (2) can be discharged from the second oblique blowing air holes (221b) and blown toward the second end (24).

5. The pressure maintaining device according to claim 3 or 4, characterized in that: The plurality of air holes (221) include a plurality of direct blowing air holes (221c) located in the middle of the air bag (2), and the gas in the air bag (2) can be discharged from the direct blowing air holes (221c) along the radial direction of the pressure roller (1).

6. The pressure maintaining device according to claim 1, characterized in that: The gas in the air bag (2) can be discharged from the air hole (221) along the radial direction of the pressure roller (1).

7. The pressure maintaining device according to claim 1, characterized in that: The air hole (221) comprises an air inlet port located inside the airbag (2) and an air outlet port located outside the airbag (2), and the caliber of the air inlet port is not less than the caliber of the air outlet port.

8. The pressure maintaining device according to claim 1, characterized in that: The pore (221) has a diameter of 0.3 mm to 0.8 mm; and / or, The distance between two adjacent air holes (221) is 1 mm to 2 mm.

9. The pressure maintaining device according to claim 1, characterized in that: The pressure roller (1) comprises a pressure maintaining section (11); Along the axial direction of the pressure roller (1), the length of the airbag (2) is not less than the length of the pressure maintaining section (11).

10. The pressure maintaining device according to claim 1, characterized in that: The airbag (2) is made of flexible material.

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