Middle frame air tightness repairing process and device thereof

Abstract

The invention relates to a middle frame air tightness repairing technology and device, and the technology comprises the steps: obtaining a leakage value of a middle frame, and carrying out the negative pressure treatment of the middle frame according to the leakage value, so as to enable an internal gap of the middle frame to reach a vacuum state; the middle frame in the vacuum state is soaked in glue, and pressure-assisted permeation treatment is conducted on the middle frame in the glue through pressure so that internal gaps of the middle frame can be filled with the glue; post-processing the filled middle frame to obtain a repaired middle frame; the post-treatment comprises cleaning and / or drying. The method can improve the repair yield and reduce the cost, and is applied to the technical field of middle frame repair.

Description

Technical Field

[0001] The present invention relates to the technical field of middle frame repair, and in particular to a middle frame airtightness repair process and a device thereof. Background Art

[0002] The existing technology uses a waterproof sealing liquid named HKW2130C (hereinafter referred to as 2130C glue) to drip through a syringe and a cotton swab to allow it to naturally penetrate and form a waterproof protective layer on the surface to achieve the purpose of repairing airtightness.

[0003] 2130C glue is a quick-drying fluorine coating made from fluorine-containing resin. It can quickly form a high-performance waterproof, oil-proof and moisture-proof protective coating on the surfaces of electronic products, electronic components, precision instruments, etc.

[0004] Before patching, engineers perform a single-unit airtightness FA (Failure Analysis) analysis on each product model. Using a debug fixture, they identify the leak point and then, following the instructions, use a 2ml medical syringe to patch the leak. This involves pouring 213OC glue into the syringe and slowly dripping it through the needle into the metal-plastic junction of the metal midframe.

[0005] This method requires detecting the location of the leak, and the repair yield is highly dependent on technology and experience. The operations of different personnel may lead to inconsistent glue repair effects, the repair yield cannot be guaranteed, and the cost is high. Summary of the Invention

[0006] In view of this, an object of the present invention is to provide a middle frame airtightness repair process and device thereof, which can improve the repair yield and reduce costs.

[0007] In one aspect, the present invention provides a middle frame airtightness repair process, comprising the following steps:

[0008] Obtaining a leakage value of the middle frame, and performing negative pressure treatment on the middle frame according to the leakage value, so that an internal gap of the middle frame reaches a vacuum state;

[0009] Immersing the vacuumed middle frame in glue, and performing pressure-assisted penetration treatment on the middle frame in the glue by applying pressure, so that the glue fills the internal gaps of the middle frame;

[0010] The filled middle frame is post-processed to obtain a repaired middle frame; the post-processing includes cleaning and / or drying.

[0011] Optionally, performing negative pressure treatment on the middle frame according to the leakage value specifically includes:

[0012] If the leakage value is less than 300 Pa, the middle frame is subjected to negative pressure treatment for more than 20 minutes;

[0013] If the leakage value is 300Pa-1000Pa, the middle frame is subjected to negative pressure treatment for more than 40 minutes;

[0014] If the leakage value is greater than 1000 Pa, the middle frame is subjected to negative pressure treatment for more than 60 minutes.

[0015] Optionally, the step of performing pressure-assisted penetration treatment on the middle frame in the glue by using pressure specifically includes:

[0016] If the leakage value is less than or equal to 300 Pa, the middle frame in the glue is subjected to pressure-assisted penetration treatment for more than 0.5-3 hours;

[0017] If the leakage value is greater than 300 Pa, the middle frame in the glue is subjected to pressure-assisted penetration treatment for 1-3 hours.

[0018] Optionally, the step of performing pressure-assisted penetration treatment on the middle frame in the glue by using pressure specifically includes:

[0019] The middle frame in the glue is subjected to pressure-assisted penetration treatment using a pressure value of 0.7-1.5 MPa.

[0020] Optionally, the post-processing of the filled middle frame to obtain a repaired middle frame specifically includes:

[0021] Soaking the filled middle frame in at least one water tank in turn to obtain a cleaned middle frame;

[0022] The cleaned middle frame is dried to obtain a repaired middle frame.

[0023] Optionally, soaking the filled middle frame in at least one water tank in turn to obtain a cleaned middle frame specifically includes:

[0024] soaking the filled middle frame in a first water tank for a first preset time to obtain a soaked middle frame;

[0025] The soaked middle frame is sequentially placed into at least one water tank, and the middle frame is scrubbed in the water tank to obtain the cleaned middle frame.

[0026] Optionally, drying the cleaned middle frame to obtain a repaired middle frame specifically includes:

[0027] drying the cleaned middle frame to obtain a dried middle frame;

[0028] The dried middle frame is baked for a second preset time to obtain a repaired middle frame.

[0029] Optionally, the repair process further includes:

[0030] Performing an airtightness test on the repaired middle frame;

[0031] If the result of the air tightness test is non-conforming, the process returns to obtain the leakage value of the middle frame, and negative pressure treatment is performed on the middle frame according to the leakage value to make the internal gap of the middle frame reach a vacuum state until the air tightness test result is conforming, thereby obtaining a repaired middle frame.

[0032] Optionally, baking the dried middle frame for a second preset time to obtain a repaired middle frame specifically includes:

[0033] The dried middle frame is baked for 20-30 minutes to obtain a repaired middle frame.

[0034] On the other hand, the present invention provides a middle frame airtightness repair system, which includes a vacuum device, a filling device and a post-processing device, wherein:

[0035] The vacuum device is used to obtain a leakage value of the middle frame and perform negative pressure treatment on the middle frame according to the leakage value, so that the internal gap of the middle frame reaches a vacuum state;

[0036] The filling device is used to immerse the middle frame after reaching the vacuum state in the glue, and perform pressure-assisted penetration treatment on the middle frame in the glue by pressure, so that the glue fills the internal gaps of the middle frame;

[0037] The post-processing device is used to perform post-processing on the filled middle frame to obtain a repaired middle frame; the post-processing includes cleaning and / or drying.

[0038] The implementation of the present invention includes the following beneficial effects: first, negative pressure treatment is performed on the middle frame to remove air from the internal gaps of the middle frame, so that the air pressure in the internal gaps of the middle frame becomes low, allowing glue to more easily and fully enter the internal gaps, and the middle frame is immersed in glue. The glue is pressed into the internal gaps using pressure, which can reduce the situation of missing leakage points, and the pressure can make the glue in the internal gaps form a dense body. During subsequent cleaning, the glue in the internal gaps is not easily washed away, thereby improving the repair yield. Compared with manual glue repair, it can be carried out in large quantities at the same time, reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a flow chart of the steps of a middle frame airtightness repair process provided by the present invention;

[0040] Figure 2This is a negative pressure treatment flow chart provided by the present invention;

[0041] Figure 3 This is a flow chart of a pressure-assisted osmosis treatment provided by the present invention;

[0042] Figure 4 This is a post-processing flow chart provided by the present invention;

[0043] Figure 5 The present invention provides a middle frame airtightness repair system;

[0044] Figure 6 This is a schematic diagram of the results of retesting the air tightness of a good glue-filled product provided by the present invention after standing for 72 hours. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The step numbers in the following embodiments are provided for ease of description only and do not limit the order of the steps. The order of execution of the steps in the embodiments can be adaptively adjusted based on the understanding of those skilled in the art.

[0046] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of the present application. The singular forms "a," "the," and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0047] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims. In the description of the present application, it should be understood that the terms "first", "second", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0048] In addition, in the description of this application, "and / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0049] In some embodiments, as Figure 1 As shown, Figure 1 The present invention provides a flow chart of the steps of the middle frame airtightness repair process, which includes the following steps:

[0050] S100 , obtaining a leakage value of the middle frame, and performing negative pressure treatment on the middle frame according to the leakage value, so that the internal gaps of the middle frame reach a vacuum state.

[0051] The leakage value can be measured using existing airtightness testing equipment. The larger the leakage value, the more micropores the middle frame has. The middle frame can be made of, but is not limited to, metal, plastic, etc.

[0052] The vacuum degree of the vacuum state may be, but is not limited to, less than or equal to -0.08 MPa.

[0053] Negative pressure treatment may include, but is not limited to, applying negative pressure to the middle frame using a vacuum pump. The parameters of the vacuum pump may include, but are not limited to, 1380 rpm; dimensions: 52 cm × 24 cm × 55 cm; gas flow rate: 140 L / min; matching power: 750 W; and ultimate vacuum degree: -93 kPa.

[0054] Internal gaps include, but are not limited to, gaps and pores.

[0055] S200, immersing the middle frame in the glue after reaching the vacuum state, and performing a pressure-assisted penetration treatment on the middle frame in the glue by pressure, so that the glue fills the internal gaps of the middle frame.

[0056] The glue may be, but is not limited to, a water-soluble acrylic copolymer glue, such as C 12 H 26 The viscosity of the glue may be between 50-450 CPS, the pH value may be, but not limited to, 5.0-8.0, and the density of the glue may be, but not limited to, 1.1-1.2 to water.

[0057] The pressure can be generated by but not limited to an air compressor, the speed of the air compressor can be but not limited to 2880r / min, the power can be but not limited to 1490W, the pressure generated can be but not limited to 0.7MPa to 0.9MPa, for example 0.8MPa, the voltage can be but not limited to 220V / 50Hz, and the capacity can be but not limited to 30L.

[0058] S300: Post-process the filled middle frame to obtain a repaired middle frame.

[0059] The post-processing includes cleaning and / or drying, and the drying may include air drying and baking.

[0060] In some embodiments, as Figure 2 As shown, Figure 2 This is a negative pressure treatment flow chart provided by the present invention. In step S100, negative pressure treatment is performed on the middle frame according to the leakage value, specifically including:

[0061] S110: If the leakage value is less than 300 Pa, the middle frame is subjected to negative pressure treatment for more than 20 minutes.

[0062] Specifically, if the leakage value is less than 300 Pa, the center frame is sucked with a vacuum pump for more than 20 minutes, for example, 20-30 minutes or 30-60 minutes, so that the vacuum degree of the internal gap reaches below -0.08 MPa.

[0063] S120: If the leakage value is 300Pa-1000Pa, apply negative pressure to the middle frame for more than 40 minutes.

[0064] Specifically, if the leakage value is less than 300Pa-1000Pa, inclusive, the center frame is vacuumed using a vacuum pump for more than 40 minutes, such as 40-50 minutes or 50-75 minutes, to reduce the vacuum degree of the internal gap to below -0.08MPa, such as -0.09MPa.

[0065] S130: If the leakage value is greater than 1000 Pa, the middle frame is subjected to negative pressure treatment for more than 60 minutes.

[0066] Specifically, if the leakage value is greater than 1000 Pa, the center frame is vacuumed for more than 60 minutes, for example, 60-70 minutes or 70-100 minutes, so that the vacuum degree of the internal gap reaches below -0.08 MPa, for example, -0.093 MPa.

[0067] like Figure 3 As shown, Figure 3 This is a flow chart of a pressure-assisted infiltration process provided by the present invention. In step S200, the pressure-assisted infiltration process is performed on the middle frame in the glue by pressure, specifically including:

[0068] S210: If the leakage value is less than or equal to 300 Pa, perform pressure-assisted penetration treatment on the middle frame in the glue for more than 0.5-3 hours.

[0069] Specifically, if the leakage value is less than or equal to 300 Pa, the pressure value of the pressure-assisted penetration treatment can be, but is not limited to, 0.7-1.5 MPa. The middle frame in the glue is subjected to pressure-assisted penetration treatment for at least 0.5-3 hours, for example, 0.5 hours, 1 hour, 1.5 hours, or 2 hours. Pressure-assisted penetration treatment means using pressure to penetrate the glue into the gap.

[0070] S220: If the leakage value is greater than 300Pa, perform pressure-assisted penetration treatment on the middle frame in the glue for 1-3 hours.

[0071] Specifically, if the leakage value is greater than 300Pa, the pressure value of the pressure-assisted penetration treatment can be but is not limited to 0.7-1.5MPa, and the middle frame in the glue is subjected to pressure-assisted penetration treatment for more than 1-3 hours, for example, 1 hour, 1.5 hours, or 2 hours.

[0072] The basis for the pressure of pressure-assisted infiltration treatment being greater than 0.7 MPa can be verified by the following four verifications:

[0073] Verification 1: positive pressure 0.7MPa, holding time 60min, quantity 36PCS, yield 83.3%;

[0074] Verification 2: positive pressure 0.6MPa, holding time 30min, quantity 36PCS, yield 55.6%;

[0075] Verification 3: positive pressure 0.7MPa, holding time 30min, quantity 36PCS, yield 88.9%;

[0076] Verification 4: Positive pressure 0.6MPa, holding time 60min, quantity 36PCS, yield 58.3%.

[0077] Therefore, using a pressure greater than 0.7 MPa will achieve better results.

[0078] like Figure 4 As shown, Figure 4 This is a post-processing flow chart provided by the present invention. In S300, the filled middle frame is post-processed to obtain a repaired middle frame, which specifically includes:

[0079] S310 , soaking the filled middle frame in at least one water tank in sequence to obtain a cleaned middle frame.

[0080] Specifically, S310 includes: S311, soaking the filled middle frame in a first water tank for a first preset time to obtain a soaked middle frame. The first preset time can be, but is not limited to, 4-5 minutes, for example, 4.5 minutes. The liquid in the water tank is water.

[0081] S312 , placing the soaked middle frame into at least one water tank in turn, and scrubbing the middle frame in the water tank to obtain a cleaned middle frame.

[0082] The number of water tanks can be determined based on actual cleaning conditions. When the material is cleaned until no obvious turbidity appears in one of the water tanks, the number of water tanks is considered appropriate. The at least one water tank can be three or more, such as four, five, six, seven, or eight.

[0083] In each water tank in step S312 , the middle frame is scrubbed up and down or left and right to obtain a cleaned middle frame.

[0084] S320: Dry the cleaned middle frame to obtain a repaired middle frame.

[0085] Specifically, step S320 includes: S321, drying the cleaned middle frame to obtain a dried middle frame. The drying can be air drying or drying with a fan.

[0086] S322: Bake the dried middle frame for a second preset time to obtain a repaired middle frame.

[0087] The second preset time may be, but is not limited to, 20-30 minutes, and the baking temperature may be, but is not limited to, 50-80°C, such as 60°C or 70°C.

[0088] In some embodiments, in addition to the aforementioned process flow, the present invention may further include:

[0089] S400. Perform an airtightness test on the repaired middle frame.

[0090] Specifically, the repaired midframe can be tested for airtightness using the dyne pen method in an environment with a temperature of 55°C and a humidity of 95% for 48 hours. If the dyne value meets the test standard range of 36 dyn / cm or higher, it is considered a good product; otherwise, it is considered a bad product.

[0091] S500: If the result of the airtightness test is non-conforming, return to the process of obtaining the leakage value of the middle frame, and perform negative pressure treatment on the middle frame according to the leakage value to make the internal gap of the middle frame reach a vacuum state until the result of the airtightness test is conforming, thereby obtaining a repaired middle frame.

[0092] Specifically, if the result of the airtightness test is non-conforming, the leakage value of the non-conforming middle frame is obtained, and steps S100 to S400 are repeated until the result of the airtightness test is conforming, thereby obtaining a repaired middle frame.

[0093] If the result of the airtightness test is good, the combined POR (Power-On Reset) production process is executed.

[0094] The present invention also provides a specific production process, which includes packing 36 PCS of middle frames into barrels, vacuum-treating the middle frames, and performing positive and negative pressure glue pouring on the middle frames for 60 minutes. Then, the glue-filled middle frames are taken out and rinsed for 10 minutes. The rinsed middle frames are transferred to a high-temperature oven and baked for 30 minutes. The middle frames are then fully inspected and glue-rubbed for 30 minutes to obtain the repaired middle frames.

[0095] like Figure 5 As shown, Figure 5 The present invention provides a middle frame airtightness repair system, which includes a vacuum device, a filling device and a post-processing device, wherein:

[0096] A vacuum device is used to obtain the leakage value of the middle frame and perform negative pressure treatment on the middle frame according to the leakage value to make the internal gap of the middle frame reach a vacuum state;

[0097] A filling device is used to immerse the middle frame after reaching the vacuum state in the glue, and perform pressure-assisted penetration treatment on the middle frame in the glue by pressure, so that the glue fills the internal gaps of the middle frame;

[0098] The post-processing device is used to perform post-processing on the filled middle frame to obtain a repaired middle frame; the post-processing includes cleaning and / or drying.

[0099] Specifically, the vacuum device may be, but is not limited to, a vacuum pump, the filling device may be, but is not limited to, an air compressor, and the post-processing device may be, but is not limited to, a water tank. The specific process is the same as the aforementioned method flow, and will not be repeated here.

[0100] The present invention also has the following beneficial effects:

[0101] The present invention first performs negative pressure treatment on the middle frame to remove air from the internal gaps of the middle frame, so that the air pressure in the internal gaps of the middle frame becomes low, allowing glue to enter the internal gaps more easily and fully. The middle frame is immersed in glue, and the glue is pressed into the internal gaps by pressure, which can reduce the situation of missing leakage points. The pressure can make the glue in the internal gaps form a dense body. During subsequent cleaning, the glue in the internal gaps is not easily washed away, thereby improving the repair yield. Compared with manual glue repair, it can be carried out in large quantities at the same time, reducing costs.

[0102] The following experimental data show that the present invention can increase production capacity and reduce costs:

[0103] As shown in Table 1, Table 1 is a comparison of the leakage values of a middle frame with poor airtightness before and after glue filling. Compared with before and after glue filling, the leakage value of the middle frame decreased by 100%, with an average decrease of 149.7Pa, a maximum decrease of 384.2Pa, and a minimum decrease of 26.8Pa.

[0104] Table 1

[0105]

[0106]

[0107] As shown in Tables 2-4, Table 2 shows the yield rate distribution of the first glue filling of a middle frame with different leakage values, Table 3 shows the yield rate distribution of the second glue filling of a middle frame with different leakage values, and Table 4 shows the yield rate distribution of the second glue filling of a middle frame with different leakage values. For middle frame products with defective airtightness, vacuum glue filling improves the first glue filling yield by 8% compared to manual glue filling, and the second glue filling comprehensive yield improves by 10%. For products with large leaks, vacuum glue filling improves the first glue filling yield by 9% compared to manual glue filling, and the second glue filling comprehensive yield improves by 29%.

[0108] Table 2

[0109]

[0110]

[0111] Table 3

[0112]

[0113] Table 4

[0114]

[0115] Tables 5 and 6 show a production capacity comparison. Table 5 shows the manpower calculation for the glue filling process, while Table 6 shows the manpower calculation for manual glue filling. Taking a daily production capacity of 4K as an example, the vacuum glue filling process saves approximately 21 manpower compared to the manual glue filling process. After conversion, vacuum glue filling saves 5.2 manpower per 1,000 pieces compared to manual glue filling.

[0116] Table 5

[0117]

[0118] Table 6

[0119]

[0120]

[0121] like Figure 6 As shown, Figure 6 This figure shows the results of retesting the air tightness of a good glue-filled product provided by the present invention after 72 hours of quiescence. The measurement conditions were: 32 pieces were added and the air tightness was measured after 72 hours of quiescence. Of these, only 1 piece reached 53 Pa, exceeding the standard value by 8 Pa. To account for measurement error, the test mean analysis showed a 19.7 mean before quiescence and a 19.1 mean after quiescence, indicating a 0.6 decrease in the mean air tightness test after quiescence. Based on this data analysis, the mean test data after quiescence showed an improving trend. Conclusion: The test passed after quiescence.

[0122] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A middle frame airtightness repair process, characterized in that: The following steps are involved: Obtaining a leakage value of the middle frame, and performing negative pressure treatment on the middle frame according to the leakage value, so that an internal gap of the middle frame reaches a vacuum state; Immersing the vacuumed middle frame in glue, and performing pressure-assisted penetration treatment on the middle frame in the glue by applying pressure, so that the glue fills the internal gaps of the middle frame; The filled middle frame is post-processed to obtain a repaired middle frame; the post-processing includes cleaning and / or drying.

2. The repair process according to claim 1, characterized in that: The performing negative pressure treatment on the middle frame according to the leakage value specifically includes: If the leakage value is less than 300 Pa, the middle frame is subjected to negative pressure treatment for more than 20 minutes; If the leakage value is 300Pa-1000Pa, the middle frame is subjected to negative pressure treatment for more than 40 minutes; If the leakage value is greater than 1000 Pa, the middle frame is subjected to negative pressure treatment for more than 60 minutes.

3. The repair process according to claim 1, characterized in that: The pressure-assisted penetration treatment of the middle frame in the glue by pressure specifically includes: If the leakage value is less than or equal to 300 Pa, the middle frame in the glue is subjected to pressure-assisted penetration treatment for more than 0.5-3 hours; If the leakage value is greater than 300 Pa, the middle frame in the glue is subjected to pressure-assisted penetration treatment for 1-3 hours.

4. The repair process according to claim 1, characterized in that: The pressure-assisted penetration treatment of the middle frame in the glue by pressure specifically includes: The middle frame in the glue is subjected to pressure-assisted penetration treatment using a pressure value of 0.7-1.5 MPa.

5. The repair process according to claim 1, characterized in that: The post-processing of the filled middle frame to obtain a repaired middle frame specifically includes: Soaking the filled middle frame in at least one water tank in turn to obtain a cleaned middle frame; The cleaned middle frame is dried to obtain a repaired middle frame.

6. The repair process according to claim 5, characterized in that: The step of sequentially immersing the filled middle frame in at least one water tank to obtain a cleaned middle frame specifically includes: soaking the filled middle frame in a first water tank for a first preset time to obtain a soaked middle frame; The soaked middle frame is sequentially placed into at least one water tank, and the middle frame is scrubbed in the water tank to obtain the cleaned middle frame.

7. The repair process according to claim 5, characterized in that: The step of drying the cleaned middle frame to obtain a repaired middle frame specifically includes: drying the cleaned middle frame to obtain a dried middle frame; The dried middle frame is baked for a second preset time to obtain a repaired middle frame.

8. The repair process according to claim 1, characterized in that: The repair process also includes: Performing an airtightness test on the repaired middle frame; If the result of the air tightness test is non-conforming, return to execute to obtain the leakage value of the middle frame, and perform negative pressure treatment on the middle frame according to the leakage value to make the internal gap of the middle frame reach a vacuum state until the result of the air tightness test is conforming, thereby obtaining a repaired middle frame.

9. The repair process according to claim 7, characterized in that: The step of baking the dried middle frame for a second preset time to obtain a repaired middle frame specifically includes: The dried middle frame is baked for 20-30 minutes to obtain a repaired middle frame.

10. A middle frame airtightness repair system, characterized in that: The repair system includes a vacuum device, a filling device and a post-processing device, wherein: The vacuum device is used to obtain a leakage value of the middle frame and perform negative pressure treatment on the middle frame according to the leakage value, so that the internal gap of the middle frame reaches a vacuum state; The filling device is used to immerse the middle frame after reaching the vacuum state in the glue, and perform pressure-assisted penetration treatment on the middle frame in the glue by pressure, so that the glue fills the internal gaps of the middle frame; The post-processing device is used to perform post-processing on the filled middle frame to obtain a repaired middle frame; the post-processing includes cleaning and / or drying.

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