A screen plastic part fitting jig

Abstract

The application relates to the technical field of display equipment manufacturing, in particular to a laminating jig for a screen plastic part, which comprises a jig platform and a piece bearing platform, the plastic part is fixed on the jig platform through a positioning part and a suction part; the piece bearing platform is used for bearing a screen glass and is arranged on the laminating jig in a liftable manner; a fixed base is arranged at the bottom of the jig platform, a position adjustment mechanism is arranged between the fixed base and the jig platform, and the position adjustment mechanism is used for adjusting the position state of the screen glass and the plastic part on the jig platform. The laminating jig can accurately adjust the relative laminating position of the plastic part and the screen glass, and meets the requirement of machining precision.

Description

Technical Field

[0001] This application relates to the field of display device manufacturing technology, and more specifically, to a bonding fixture for plastic parts for screens. Background Technology

[0002] In the manufacturing process of display devices, conventional mounting fixtures use locating pins and locating edges to fix plastic parts. Because the plastic parts themselves have large deformation tolerances, and the fixture processing and locating pins also have tolerances, it is difficult to meet the requirements for higher precision bonding.

[0003] Conventional fixtures separate the dispensing, bonding, and pressure holding processes. In the production flow, adhesive is first applied to the plastic parts to be bonded, then the glued parts are placed on the screen glass for bonding, and finally, the screen glass and plastic parts are moved to a pressure holding fixture for post-bonding pressure holding. This method carries the risk of the plastic parts moving on the glass if they haven't undergone pressure holding and are not firmly bonded, resulting in inconsistent bonding accuracy and low precision.

[0004] Meanwhile, existing technologies rely on visual observation to ensure the alignment between plastic parts and screen glass, which cannot effectively guarantee precise alignment. Utility Model Content

[0005] The purpose of this application is to provide a bonding fixture for plastic parts of a screen, which can accurately adjust the relative bonding position between the plastic part and the screen glass to meet the requirements of processing accuracy.

[0006] To achieve the above objectives, this utility model provides a bonding fixture for plastic parts for screens, including a fixture platform and a support platform, wherein the plastic parts are adsorbed and fixed on the fixture platform by a positioning part and an adsorption part. The support platform is used to support the screen glass and can be raised and lowered on the bonding fixture; The bottom of the fixture platform is provided with a fixed base, and an alignment adjustment mechanism is provided between the fixed base and the fixture platform to adjust the alignment of the screen glass and the plastic parts on the fixture platform.

[0007] In an optional embodiment, the positioning part and the adsorption part are disposed on the fixture platform. The positioning part is used for positioning and placing the plastic part on the fixture platform, and the adsorption part is used for adsorbing and fixing the plastic part after positioning and placement.

[0008] In an optional embodiment, the positioning part includes a plurality of positioning pins disposed on the fixture platform, the positioning pins corresponding to and engaging with through holes on the plastic part.

[0009] In an optional embodiment, the adsorption unit includes a plurality of adsorption holes located on the fixture platform, and the fixture platform is provided with adsorption channels and / or adsorption cavities, the adsorption channels and / or the adsorption cavities being in communication with the adsorption holes. The fixture platform is connected to an air extraction pipe, and an air extraction device for providing negative pressure for adsorption is connected to the external of the air extraction pipe.

[0010] In an optional embodiment, the fixture platform includes an annular frame, and the support platform is disposed on the inner side of the annular frame and can be raised and lowered relative to the annular frame.

[0011] In an optional embodiment, the positioning part and the adsorption part are disposed on the same side of the annular frame and are disposed corresponding to the bonding part of the plastic part on the screen glass.

[0012] In an optional embodiment, an image acquisition component and a display component are provided above the fixture platform and the support platform to acquire and display the alignment image status of the screen glass and the plastic part, and a supplementary lighting component is installed on the fixture platform.

[0013] In an optional embodiment, a pressure-holding mechanism is also included for pressing the screen glass onto the plastic part after adhesive application; A frame is provided on the side of the fixture platform, and the pressure holding mechanism includes a pressure holding cylinder mounted on the frame and a pressure holding head connected to the telescopic rod of the pressure holding cylinder.

[0014] In an optional embodiment, the pressure-holding cylinder and the pressure-holding head are arranged in pairs, and the pressure-holding head includes a strip-shaped pressure block, with the paired pressure blocks extending in the same straight direction.

[0015] In an optional embodiment, the alignment adjustment mechanism includes an adjusting micrometer disposed between the fixed base and the fixture platform.

[0016] The positioning and adsorption sections enable the plastic parts to be positioned and fixed on the fixture platform by air suction. Combined with the support platform for supporting the screen glass, the screen glass can be supported and fixed before the screen glass and plastic parts are aligned. This facilitates the screen glass to be lowered onto the fixture platform after fine-tuning and precise alignment, and the bonding of the plastic parts and screen glass is completed after glue application.

[0017] By combining the fixed base at the bottom of the fixture platform with the alignment adjustment mechanism between the fixed base and the fixture platform, the position of the fixture platform can be finely adjusted. This allows the screen glass to be fixed under load and the plastic parts to be fixed by adsorption on the fixture platform. By finely adjusting the alignment relationship between the plastic parts and the screen glass, the processing accuracy requirements can be met.

[0018] In a further implementation, by setting up an image acquisition component and a display component, the visual alignment adjustment of the plastic parts and the screen glass can be achieved, which helps to ensure the accurate alignment of the plastic parts and the screen glass.

[0019] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the bonding fixture used for plastic parts of the screen in this application; Figure 2 This is a schematic diagram of the alignment adjustment mechanism; Figure 3 This is a schematic diagram of the positioning and adsorption parts on the fixture platform.

[0022] icon: 1- Fixture platform; 11- Fixture base; 12- Positioning pin; 13- Adsorption hole; 2-Slab support platform; 3-Alignment adjustment mechanism; 31-Adjusting micrometer; 4-Ejection pipe; 5-Image acquisition component; 6-Display components; 7-Fill light assembly; 8-Pressure holding mechanism; 81-Pressure holding cylinder; 82-Pressure holding head; 9-Rack. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] The bonding fixture for screen plastic parts in this application is mainly used for adjusting the screen plastic parts and screen glass during the alignment process, thereby meeting the accuracy requirements for the installation of plastic parts on screen glass.

[0027] See Figure 1 and combined Figures 2-3 The bonding fixture for screen plastic parts in this application includes a fixture platform 1 and a support platform 2. The plastic parts are adsorbed and fixed on the fixture platform 1 by the positioning part and the adsorption part. The support platform 2 is used to support the screen glass and can be raised and lowered on the bonding fixture; A fixed base 11 is provided at the bottom of the fixture platform 1, and an alignment adjustment mechanism 3 is provided between the fixed base 11 and the fixture platform 1 for adjusting the alignment of the screen glass and the plastic parts on the fixture platform 1.

[0028] This application improves the fixing method of plastic parts on the fixture platform 1. The positioning part can be positioned and placed on the fixture platform 1. Combined with the adsorption part, the plastic parts can be fixed on the fixture platform 1 by vacuum negative pressure air suction, thereby fixing the plastic parts on the fixture platform 1. After the plastic parts are positioned and fixed, glue is applied.

[0029] By setting a fixed base 11 at the bottom of the fixture platform 1 and setting an alignment adjustment mechanism 3 between the fixed base 11 and the fixture platform 1, the plastic parts and the screen glass can be aligned by finely adjusting the position of the fixture platform 1. Thus, under the premise that the plastic parts are adsorbed and fixed on the fixture platform 1, the alignment relationship between the plastic parts and the screen glass can be accurately adjusted.

[0030] The finely adjustable alignment mechanism 3 compensates for the tolerances of the plastic parts and the fixture itself, achieving high-precision alignment between the screen glass and the plastic parts, and overcoming the problem of insufficient positioning accuracy when relying solely on the positioning pin 12.

[0031] The support platform 2 is mainly used to support the screen glass. With its liftable design, it can keep the screen glass raised during the alignment process. After alignment, the support platform 2 is lowered to allow the screen glass to adhere to the glued plastic parts, and then a pressure holding operation is performed.

[0032] Through the above operations, an integrated process for bonding plastic parts can be achieved, combining dispensing, bonding, and pressure holding into a single fixture. This avoids the risk of misalignment caused by moving the workpiece before the plastic parts are firmly bonded, ensuring the stability of the bonding process and the yield of finished products.

[0033] Meanwhile, with the plastic parts positioned and fixed on the fixture platform 1, the adjustability of the fixture platform 1 provides a physical basis for subsequent precise alignment using image acquisition, avoiding the uncertainty of relying on visual observation.

[0034] The positioning part and the adsorption part in this application are set on the fixture platform 1. The positioning part is used to position the plastic part when it is placed to ensure that the plastic part can be initially positioned.

[0035] The adsorption unit specifically adopts the form of vacuum negative pressure adsorption, which provides effective adsorption and fixing force after positioning and placement, firmly fixing the plastic parts that may be deformed due to injection molding onto the fixture platform 1, eliminating the influence of the workpiece's own deformation on the final bonding accuracy.

[0036] In terms of specific components, the positioning unit includes multiple positioning pins 12 mounted on the fixture platform 1, which correspond to and engage with through holes on the plastic part. This allows for quick and accurate restriction of the movement and rotation of the plastic part within a plane, providing a good initial reference for subsequent fine-tuning.

[0037] The adsorption unit includes multiple adsorption holes 13 located on the fixture platform 1. The fixture platform 1 is provided with adsorption channels and / or adsorption cavities, and the adsorption channels and / or adsorption cavities are spatially connected to the adsorption holes 13.

[0038] Meanwhile, the fixture platform 1 is connected to an air extraction pipe 4, and the air extraction pipe 4 is externally connected to an air extraction device for providing adsorption negative pressure.

[0039] A vacuum system consisting of adsorption holes 13, adsorption channels / adsorption cavities, extraction pipes 4, and extraction equipment can generate a uniformly distributed adsorption force.

[0040] This air suction fixing method has no mechanical stress and will not scratch the surface of the workpiece. It is especially suitable for easily deformable plastic parts, and can make them stably adhere to the surface of the fixture.

[0041] The fixture platform 1 includes an annular frame, and the support platform 2 is located inside the annular frame. This arrangement facilitates the positioning and fixing of plastic parts on the annular frame, and at the same time enables the support platform 2 to move up and down relative to the annular frame from the inside of the annular frame, supporting and lifting the screen glass.

[0042] The screen glass is well guided and supported during the lifting and lowering process, ensuring stable vertical contact with the plastic parts and avoiding misalignment caused by tilted fitting.

[0043] It should be noted that during the alignment process, the screen glass is in a raised state. The lifting and lowering performance of the support platform 2 can be achieved by setting a lifting cylinder and guide components at the bottom of the support platform 2. This is not the main improvement point of this application and will not be elaborated here.

[0044] Since the plastic part in this application is located on one side of the display screen, the positioning part and the adsorption part are arranged on the same side of the annular frame, so that the plastic part can be positioned, adsorbed and fixed on one side of the fixture platform 1.

[0045] Furthermore, the positioning and adsorption parts are positioned to correspond to the bonding parts of the plastic parts on the screen glass. This ensures reliable adsorption force at the bonding parts of the plastic parts on the screen glass on the fixture platform 1, while avoiding structural settings in non-bonding areas, reducing obstruction of the operating space, and facilitating observation and adjustment.

[0046] Based on the above-described method of precise alignment using image acquisition, this application provides an image acquisition component 5 and a display component 6 above the fixture platform 1 and the support platform 2 to acquire and display the alignment image status of the screen glass and the plastic part. A supplementary lighting component 7 is installed on the fixture platform 1 to provide a reliable lighting environment.

[0047] By introducing image acquisition component 5 and display component 6 to replace the human eye, high-precision observation can be achieved. Image acquisition component 5 and display component 6 can magnify the alignment status and clearly present it to the operator, which is conducive to adjusting the alignment status of plastic parts and screen glass, eliminating subjective errors and fatigue errors caused by human observation, and supplementary lighting component 7 ensures the clarity and stability of image acquisition and adapts to different ambient light conditions.

[0048] After alignment and adjustment, and lowering the support platform 2 to bond the screen glass and plastic parts, pressure holding is required to enhance the bonding strength.

[0049] The pressure holding operation is specifically performed by the pressure holding mechanism 8, which can simultaneously achieve in-situ pressure holding between the screen glass and the plastic parts. After the screen glass is lowered and the plastic parts are bonded together after the glue is applied, there is no need to move the workpiece; the pressure holding mechanism 8 on the bonding fixture can directly perform the pressure holding.

[0050] A frame 9 is provided on the side of the fixture platform 1. The pressure holding mechanism 8 includes a pressure holding cylinder 81 mounted on the frame 9 and a pressure holding head 82 connected to the telescopic rod of the pressure holding cylinder 81.

[0051] Furthermore, the pressure-holding cylinder 81 and the pressure-holding head 82 are arranged in pairs. The pressure-holding head 82 includes a strip-shaped pressure block, and the paired pressure blocks extend in the same straight direction.

[0052] The paired strip-shaped pressure blocks provide uniform and linear downward pressure, ensuring that adhesives such as optical adhesives are fully squeezed out and air bubbles are eliminated, forming a uniform adhesive layer, while preventing the workpiece from warping or deforming during the pressure holding process.

[0053] The alignment adjustment mechanism 3 in this application includes an adjusting micrometer 31 disposed between the fixed base 11 and the fixture platform 1. It can provide micron-level adjustment accuracy, and the operator can make fine-tuning adjustments to the position of the fixture platform 1 based on visual feedback from the image acquisition component 5 and the display component 6, thereby achieving alignment operations with ultra-high fitting accuracy.

[0054] In terms of overall composition, the bonding fixture for plastic parts of the screen mainly includes a fixture platform 1, a support platform 2, an adjusting micrometer 31, an image acquisition component 5, a display component 6, and a pressure holding mechanism 8.

[0055] The fixture platform 1 has a rectangular frame structure, consisting of an annular frame. A positioning part and an adsorption part are provided on one side of the annular frame.

[0056] The positioning section includes multiple positioning pins 12, the positions of which correspond to the through holes on the plastic part to be bonded. By fitting the through holes of the plastic part onto the positioning pins 12, the plastic part is positioned and placed on the fixture platform 1.

[0057] The adsorption section includes a plurality of adsorption holes 13 distributed on one side of an annular frame. The annular frame is machined with adsorption channels and / or adsorption cavities, and all adsorption holes 13 communicate with the adsorption channels and / or adsorption cavities.

[0058] The side wall of the annular frame is connected to an air extraction pipe 4, which is connected to a vacuum generator. When the vacuum generator is started, a negative pressure is generated in the adsorption channel and / or adsorption cavity, which suctions and fixes the plastic parts placed on the fixture platform 1 through the adsorption hole 13.

[0059] The support platform 2 is located on the inner side of the annular frame and includes a support plate made of precision-ground steel. The support plate is connected to a lifting cylinder via guide columns. The lifting cylinder is fixedly mounted on the bottom of the fixture. The support platform 2 is used to support the screen glass and can be precisely raised and lowered under the drive of the lifting cylinder.

[0060] The bottom of the fixture platform 1 is connected to the fixed base 11 by adjusting the micrometer 31. By turning the micrometer 31, the position of the fixture platform 1 can be finely adjusted at the micrometer level on the same plane, thereby calibrating the alignment relationship between the plastic parts on the fixture platform 1 and the screen glass on the support platform 2.

[0061] Above the fixture platform 1, two high-resolution CCD cameras are installed, aligned with the alignment marks on the plastic part and the screen glass, respectively. The CCD cameras transmit the captured images to the monitor for real-time display. In addition, LED fill lights are installed on the fixture platform 1 to provide ample and shadowless illumination for the CCD cameras, ensuring clear images.

[0062] A frame 9 is provided on the side of the fixture platform 1. The pressure holding mechanism 8 includes a pair of pressure holding cylinders 81 mounted on the frame 9. Each pressure holding cylinder 81 has a long strip-shaped pressure holding head 82 connected to the end of its telescopic rod. The two pressure holding heads 82 are parallel to each other and extend along the long side of the screen glass.

[0063] The workflow of this embodiment is as follows: Loading and fixing: Position the plastic part on the fixture platform 1, start vacuum adsorption to fix it, and then apply glue. Place the screen glass on the support platform 2 which is in a raised state.

[0064] Alignment: The operator observes the alignment mark image captured by the CCD camera on the monitor, and operates the micrometer 31 to finely adjust the position of the fixture platform 1 and the plastic parts on it until the alignment is accurate.

[0065] Bonding: The support platform 2 descends, smoothly pressing the screen glass onto the pre-applied plastic part.

[0066] In-situ pressure holding: Activate the pressure holding mechanism 8, and the pressure holding cylinder 81 drives the long strip-shaped pressure holding head 82 to press down, applying uniform and stable pressure to the bonding area of ​​the screen glass, and maintaining it for a set time to ensure that the adhesive is fully cured and bonded.

[0067] Material unloading: After the pressure holding is completed, all mechanisms are reset and the vacuum is released, and the assembled parts are removed.

[0068] In summary, this application effectively solves the problems of low precision and poor yield caused by tolerance accumulation, moving pressure holding, and visual alignment in traditional fixtures by integrating positioning, adsorption, fine adjustment, visual alignment and in-situ pressure holding functions. It is particularly suitable for high-precision screen component bonding processes.

[0069] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0070] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A bonding fixture for plastic parts used in screens, characterized in that, Includes a fixture platform and a support platform, with plastic parts being adsorbed and fixed on the fixture platform by positioning and adsorption parts; The support platform is used to support the screen glass and can be raised and lowered on the bonding fixture; The bottom of the fixture platform is provided with a fixed base, and an alignment adjustment mechanism is provided between the fixed base and the fixture platform to adjust the alignment of the screen glass and the plastic parts on the fixture platform.

2. The bonding fixture for plastic parts for screens according to claim 1, characterized in that, The positioning part and the adsorption part are disposed on the fixture platform. The positioning part is used for positioning and placing the plastic part on the fixture platform, and the adsorption part is used for adsorbing and fixing the plastic part after positioning and placement.

3. The bonding fixture for plastic parts for screens according to claim 2, characterized in that, The positioning part includes a plurality of positioning pins disposed on the fixture platform, and the positioning pins are correspondingly engaged with through holes on the plastic part.

4. The bonding fixture for plastic parts for screens according to claim 2, characterized in that, The adsorption unit includes a plurality of adsorption holes located on the fixture platform. The fixture platform is provided with adsorption channels and / or adsorption cavities, and the adsorption channels and / or adsorption cavities are in communication with the adsorption holes. The fixture platform is connected to an air extraction pipe, and an air extraction device for providing negative pressure for adsorption is connected to the external of the air extraction pipe.

5. The bonding fixture for plastic parts for screens according to any one of claims 1-4, characterized in that, The fixture platform includes an annular frame, and the support platform is located on the inner side of the annular frame and can be raised and lowered relative to the annular frame.

6. The bonding fixture for plastic parts for screens according to claim 5, characterized in that, The positioning part and the adsorption part are disposed on the same side of the annular frame and are disposed corresponding to the bonding part of the plastic part on the screen glass.

7. The bonding fixture for plastic parts for screens according to claim 5, characterized in that, An image acquisition component and a display component are provided above the fixture platform and the support platform to acquire and display the alignment image status of the screen glass and the plastic part. A supplementary lighting component is installed on the fixture platform.

8. The bonding fixture for plastic parts for screens according to claim 5, characterized in that, It also includes a pressure-holding mechanism, used to press the screen glass onto the plastic part after it has been glued; A frame is provided on the side of the fixture platform, and the pressure holding mechanism includes a pressure holding cylinder mounted on the frame and a pressure holding head connected to the telescopic rod of the pressure holding cylinder.

9. The bonding fixture for plastic parts for screens according to claim 8, characterized in that, The pressure-holding cylinder and the pressure-holding head are arranged in pairs. The pressure-holding head includes a strip-shaped pressure block, and the paired pressure blocks extend along the same straight line direction.

10. The bonding fixture for plastic parts for screens according to claim 5, characterized in that, The alignment adjustment mechanism includes an adjusting micrometer disposed between the fixed base and the fixture platform.

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