Screen dispensing process

Abstract

The invention relates to the technical field of electronic product bonding processes, and provides a screen dispensing process which comprises the following steps: S1, equipment debugging; s2, the product is placed on an equipment platform, and the product is fixed; s3, scanning the outline of the product through 3D line scanning in the equipment to obtain the outline of the product and CG height position data; s4, the PC calculates and generates a retaining wall dispensing path according to the data obtained in the step S3; s5, the glue valve performs stacked dispensing according to the retaining wall dispensing path to form a retaining wall; s6, the product is moved to the position below a UV lamp for curing and retaining wall shaping; s7, scanning the position of the retaining wall and the outline of the filling section through 3D line scanning in the equipment; s8, the PC calculates the sectional area and the path of a filling area segment; s9, the retaining wall is filled with the glue valve according to the path obtained in the step S8, and the corresponding glue amount is filled according to the change of the sectional area; and S10, the product is moved to the position below a UV lamp to be cured and shaped. Therefore, the adaptability can be improved while the screen-to-body ratio is increased.

Description

Technical Field

[0001] The present application relates to the field of electronic product bonding technology, and in particular to a screen glue dispensing technology. Background Art

[0002] Electronic devices, such as mobile phones, need to assemble the screen assembly with the middle frame. The traditional method of applying glue on the middle frame and then bonding it to the screen assembly inevitably increases the width of the border, as it requires the additional installation of a sealing rubber ring to achieve functions such as waterproofing. This reduces the valuable screen display area, i.e. the screen-to-body ratio, affecting consumers' visual experience and product competitiveness.

[0003] The existing method of increasing the screen-to-body ratio is to form a rubber ring on the screen assembly, and this is obtained through injection molding. As a mature colloid molding technology, injection molding has high efficiency in mass production, but its problem is that it lacks flexibility. Every product design change, even a small size or shape adjustment, may require the redesign and manufacture of an entire set of molds, which not only increases production costs and time cycles, but also limits the ability to quickly respond to market changes.

[0004] Therefore, the present application studies a screen dispensing process, which performs dispensing on the screen assembly, which can both increase the screen-to-body ratio and improve adaptability. Summary of the invention

[0005] In order to increase the screen-to-body ratio and improve adaptability, the present application provides a screen dispensing process.

[0006] The present application provides a screen dispensing process, which adopts the following technical solutions:

[0007] A screen dispensing process, comprising the following steps: S1: equipment debugging;

[0008] S2: Place the product on the equipment platform and fix the product;

[0009] S3: The 3D line scan in the equipment scans the product's outline to obtain the product outline and CG height position data;

[0010] S4: PC calculates and generates the dispensing path of the retaining wall according to the data obtained in step S3;

[0011] S5: The glue valves stack and dispense glue according to the dispensing path of the retaining wall to form a retaining wall;

[0012] S6: The product is moved to the UV lamp to cure the retaining wall;

[0013] S7: The 3D line scan in the equipment scans the position of the retaining wall and the contour of the filling section;

[0014] S8: PC calculates the segmented cross-sectional area and path of the filling area;

[0015] S9: The glue valve fills the retaining wall according to the path obtained in S8, and fills the corresponding glue amount according to the change of the cross-sectional area;

[0016] S10: The product is moved under UV light for curing.

[0017] By adopting the above technical solution, 3D scanning on the screen assembly can improve the accuracy of the subsequent glue dispensing path, thereby improving product quality. The retaining wall formed by the glue dispensing path can ensure that the glue is evenly distributed to form a solid retaining wall structure. The solidified retaining wall can ensure the stability and durability of the retaining wall. Filling the filling area can ensure the uniformity of the glue in the retaining wall, so that the overall quality can be more stable. In addition, the glue dispensing route can be obtained according to the size and shape of the screen assembly, thereby increasing the screen-to-body ratio and improving adaptability.

[0018] Optionally, in step S5, the viscosity of the glue used for the retaining wall is greater than 50,000 mPa·s; in step S9, the viscosity of the glue used for the filling area is less than 300 mPa·s.

[0019] Optionally, in step S5, pre-curing is performed while stacking the retaining walls.

[0020] Optionally, in step S5, the glue valve uses a Musashi V5-0.8Mpa pneumatic needle valve with a 0.2mm inner diameter precision needle.

[0021] Optionally, in step S5, the glue used is UV3326, and the glue viscosity is 70000 mPa·s.

[0022] Optionally, in step S5, the dispensing parameters include an air pressure of 0.7 MPa, no back suction, and a dispensing speed of 30 mm / s.

[0023] Optionally, in step S9, the glue valve is a Vermes 3200 spray valve with a TTF7 tappet and a nozzle of 0.1 mm.

[0024] Optionally, in step S9, the glue used is UV4321, and the glue viscosity is 100 mPa·s.

[0025] Optionally, in step S9, the dispensing parameters include RI (rise time): 3.0ms, FA (fall time): 0.23ms, OP (opening time): 1.0ms, NL (opening stroke): 50%, DL (delay interval time): 1.0ms, and air pressure: 0.2Mpa.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Performing 3D scanning on the screen assembly can improve the accuracy of the subsequent glue dispensing path, thereby improving product quality. The retaining wall formed by the glue dispensing path can ensure the uniform distribution of glue and form a solid retaining wall structure. Curing the retaining wall can ensure the stability and durability of the retaining wall. Filling the filling area can ensure the uniformity of glue in the retaining wall, making the overall quality more stable. In addition, the glue dispensing route can be obtained according to the size and shape of the screen assembly, thereby increasing the screen-to-body ratio and improving adaptability.

[0028] 2. Follow-up pre-curing can prevent the glue from collapsing and deforming, and make it into the shape of retaining walls on both sides, so that the glue can be better filled in the retaining walls, so as to ensure the shape of the formed rubber ring and better improve the screen-to-body ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a flowchart of the screen dispensing process of the embodiment of the present application;

[0030] Figure 2 It is a schematic diagram of the method of dispensing glue on the screen in the screen dispensing process of an embodiment of the present application. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-2 This application is described in further detail.

[0032] The present application embodiment discloses a screen dispensing process. Figure 1 and Figure 2 The screen dispensing process includes the following steps: S1: equipment debugging. The debugging equipment in this embodiment includes product placement debugging, 3D line scan (line laser) scanning position debugging, 3D line scan data processing-dispensing trajectory generation, dispensing parameter setting debugging, dispensing needle and 3D line scan calibration XYZ position, etc., so as to obtain a basic path.

[0033] S2: Place the product on the equipment platform and fix the product. The product is a screen assembly. In this embodiment, the product is fixed by vacuum adsorption.

[0034] S3: The 3D line scan in the equipment scans the product's outline to obtain the product outline and CG height position data;

[0035] S4: The PC calculates and generates the dispensing path for the retaining wall based on the data obtained in step S3. This embodiment calculates the layer-by-layer offset based on the single dispensing specification, which can ensure that when there are differences in products, the correct dispensing path can still be obtained based on the product differences.

[0036] S5: The glue valve stacks and dispenses glue according to the dispensing path of the retaining wall to form a retaining wall. In some embodiments, the retaining wall is stacked and pre-cured at the same time, so that the shape of the retaining wall can be better guaranteed, so that the shape of the formed glue strip can be better guaranteed, and the screen ratio can be guaranteed.

[0037] Specifically, the viscosity of the glue used for the retaining wall is greater than 50000mPa·s. The glue used in this embodiment is UV3326, and the glue viscosity is 70000mPa·s; the glue valve uses the Musashi V5-0.8Mpa pneumatic needle valve, with a 0.2mm inner diameter precision needle; the dispensing parameters include an air pressure of 0.7Mpa, no back suction, and a dispensing speed of 30mm / s.

[0038] S6: The product is moved under the UV lamp to cure the retaining wall and fix it. The curing time is about 10 seconds, which can be extended or shortened according to the different glue characteristics.

[0039] S7: The 3D line scan in the equipment scans the position of the retaining wall and the contour of the filling section, thereby calculating the cross-sectional area of ​​each position of the entire glue mold;

[0040] S8: PC calculates the segmented cross-sectional area and path of the filling area, which can better scan the demand at different positions. Specifically, PC plans the filling path trajectory according to the position of the retaining wall, and calculates the glue adjustment parameters according to the filling cross-sectional area scanned by the retaining wall and the product.

[0041] S9: The glue valve fills the retaining wall according to the path obtained by S8, and fills the corresponding glue amount according to the change of the cross-sectional area. Specifically, the glue output amount is adjusted according to the change of the cross-sectional area parameter to achieve the effect of leveling the filled glue without overflowing or lack of glue.

[0042] Specifically, the viscosity of the glue used for the retaining wall is greater than 50000mPa·s. In this embodiment, the glue used is UV4321, and the glue viscosity is 100mPa·s; the glue valve is Vermes 3200 spray valve, with TTF7 striker, and the nozzle is 0.1mm; the dispensing parameters include RI (rise time): 3.0ms, FA (fall time): 0.23ms, OP (opening time): 1.0ms, NL (opening stroke): 50%, DL (delay interval time): 1.0ms, and air pressure: 0.2Mpa.

[0043] The retaining wall is made using a 0.2mm small-aperture nozzle, which can produce a very fine glue pattern. The flatness of the retaining wall shape can be less than 30μm, and then the glue is quickly filled, so that both positive glue pattern and efficiency can be taken into account.

[0044] S10: The product is moved under the UV lamp for curing and setting. The curing time is about 10 seconds, which can be extended or shortened according to the different characteristics of the glue. After completion, the material is unloaded manually.

[0045] The implementation principle of a screen dispensing process in an embodiment of the present application is as follows: performing 3D scanning on the screen assembly can improve the accuracy of the subsequent dispensing path, thereby improving product quality; the retaining wall formed by the dispensing path can ensure that the glue is evenly distributed, forming a solid retaining wall structure; the solidified retaining wall can ensure the stability and durability of the retaining wall; filling the filling area can ensure the uniformity of the glue in the retaining wall, so that the overall quality can be more stable; and the dispensing route can be obtained according to the size and shape of the screen assembly, thereby increasing the screen-to-body ratio and improving adaptability.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A screen dispensing process, characterized in that: The following steps are involved: S1: Equipment debugging; S2: Place the product on the equipment platform and fix the product; S3: The 3D line scan in the equipment scans the product's outline to obtain the product outline and CG height position data; S4: PC calculates and generates the dispensing path of the retaining wall according to the data obtained in step S3; S5: The glue valves stack and dispense glue according to the dispensing path of the retaining wall to form a retaining wall; S6: The product is moved to the UV lamp to cure the retaining wall; S7: The 3D line scan in the equipment scans the position of the retaining wall and the contour of the filling section; S8: PC calculates the segmented cross-sectional area and path of the filling area; S9: The glue valve fills the retaining wall according to the path obtained in S8, and fills the corresponding glue amount according to the change of the cross-sectional area; S10: The product is moved under UV light for curing.

2. A screen dispensing process according to claim 1, characterized in that: In step S5, the viscosity of the glue used for the retaining wall is greater than 50,000 mPa·s; in step S9, the viscosity of the glue used for the filling area is less than 300 mPa·s.

3. A screen dispensing process according to claim 1, characterized in that: In step S5, pre-curing is performed while stacking the retaining wall.

4. The screen dispensing process according to claim 1, characterized in that: In step S5, the glue valve uses a Musashi V5-0.8Mpa pneumatic needle valve with a 0.2mm inner diameter precision needle.

5. The screen dispensing process according to claim 2, characterized in that: In step S5, the glue used is UV3326, and the viscosity of the glue is 70000 mPa·s.

6. The screen dispensing process according to claim 1, characterized in that: In step S5, the dispensing parameters include air pressure of 0.7 MPa, no suck-back, and a dispensing speed of 30 mm / s.

7. The screen dispensing process according to claim 1, characterized in that: In step S9, the glue valve is a Vermes 3200 spray valve, with a TTF7 tappet and a 0.1mm nozzle.

8. The screen dispensing process according to claim 2, characterized in that: In step S9, the glue used is UV4321, and the viscosity of the glue is 100 mPa·s.

9. The screen dispensing process according to claim 1, characterized in that: In step S9, the dispensing parameters include RI (rise time): 3.0ms, FA (fall time): 0.23ms, OP (opening time): 1.0ms, NL (opening stroke): 50%, DL (delay interval time): 1.0ms, and air pressure: 0.2Mpa.

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