FPC rework fixture and FPC rework method

Abstract

The invention discloses an FPC rework jig and an FPC rework method. The FPC rework jig comprises: a main frame, a heating control circuit, a heating platform and a support part. A mounting platform is formed on the main frame, the heating platform is arranged on the mounting platform, the heating control circuit is arranged inside the mounting platform, the heating control circuit is electrically connected to the heating platform, the support part is arranged on one side of the main frame, the working temperature of the heating platform is 100-200°C, a positioning part is arranged on the heating platform, the positioning part cooperates with the support part so that when a FOG product to be disassembled is placed on the heating platform, the liquid crystal glass of the FOG product and the heating platform are at 30-120°. The invention enables the liquid crystal panel and FPC after the FOG defective product is disassembled to be reworked and reused, with a high success rate, greatly reducing the waste of raw materials, and realizing green, environmentally friendly and energy-saving production.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal display module or OLED processing, and in particular to an FPC reworking jig and an FPC reworking method. Background Art

[0002] In the production of LCD display modules or OLED processing, for FOG products with poor binding, the FPC is usually torn off by hand, and the torn FPC is reused after passing the inspection. In the process of tearing off the FPC, it is easy to tear the liquid crystal glass, making it impossible to reuse the liquid crystal glass and it can only be discarded. The torn FPC cannot be directly reworked due to deformation and bending, resulting in a waste of raw materials. Some factories directly scrap the bad FOG products. Both methods generate a lot of industrial waste and cause a waste of raw materials, and cannot achieve green and energy-saving production.

[0003] Therefore, there is an urgent need for a safe and effective FPC rework jig and method so that components with good functions in poorly bound FOG products can be reworked and used to achieve green, environmentally friendly and energy-saving production. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an FPC rework jig and an FPC rework method.

[0005] The technical solution of the present invention is as follows: The present invention provides an FPC rework jig, which includes: a main frame, a heating control circuit, a heating platform and a supporting part. A mounting platform is formed on the main frame, the heating platform is arranged on the mounting platform, the heating control circuit is arranged inside the mounting platform, the heating control circuit is electrically connected to the heating platform, the supporting part is arranged on one side of the main frame, the working temperature of the heating platform is 100-200°C, and a positioning part is provided on the heating platform. The positioning part cooperates with the supporting part so that when the FOG product to be disassembled is placed on the heating platform, the liquid crystal glass of the FOG product is 30-120° with the heating platform.

[0006] Furthermore, the positioning portion is a "V"-shaped groove or an arc-shaped groove hollowed out on the heating platform, and the depth of the "V"-shaped groove or the arc-shaped groove is 0.8-1.5 cm.

[0007] Furthermore, the support portion is a support plate, the top surface of the support plate is an inclined surface, the inclined surface is arranged toward the heating platform, an anti-slip layer is arranged on the inclined surface, and the height of the support plate is 4-8 cm.

[0008] Furthermore, the main frame forms an insertion hole corresponding to the support plate, and a threaded hole is provided on the side of the insertion hole away from the heating platform. The bottom of the support plate is inserted into the insertion hole, and a screw passes through the threaded hole and abuts against the side of the support plate, thereby fixing and locking the support plate. The depth of the bottom of the support plate inserted into the insertion hole is adjustable.

[0009] Furthermore, the heating platform is a heat-conducting metal plate, a heating tube is provided under the heat-conducting metal plate, and the heating platform is also provided with a switch and a temperature adjustment device respectively connected to the heating control circuit; an isolation groove is provided between the periphery of the mounting platform and the main frame, and the top surface of the heating platform is arranged to be lower than the top surface of the main frame.

[0010] The present invention also provides a reworking method for an FPC, comprising the following steps:

[0011] Turn on the rework fixture and adjust the working temperature of the heating platform to the required temperature;

[0012] When the heating platform is heated to the required temperature, place the liquid crystal glass of the FOG product to be disassembled at a certain angle to the heating platform, and place the FPC horizontally on the heating platform, and keep heating for the first time;

[0013] Tear off the FPC from top to bottom, place the gold finger area of ​​the torn FPC flat on the heating platform, and smooth the FPC after heating for a second time;

[0014] Use cleaning fluid to clean the FPC gold finger area and the steps of the LCD glass to remove the AFC glue.

[0015] Furthermore, the method further comprises the steps of:

[0016] Use a microscope to check whether the circuits in the FPC gold finger area and the steps of the LCD glass are clean; and / or check whether the FPC binding circuits are bent or deformed;

[0017] Re-bond the clean FPC to the LCD glass of the FOG product.

[0018] Furthermore, the required temperature is 100-200°, the first time is 5-7 seconds, and the second time is 2-3 seconds.

[0019] Further, the rework fixture includes: a main frame, a heating control circuit, a heating platform and a support part, a mounting platform is formed on the main frame, the heating platform is arranged on the mounting platform, the heating control circuit is arranged inside the mounting platform, the heating control circuit is electrically connected to the heating platform, the support part is arranged on one side of the main frame, the working temperature of the heating platform is 100-200°C, a positioning part is arranged on the heating platform, the positioning part cooperates with the support part so that when the FOG product to be disassembled is placed on the heating platform, the liquid crystal glass of the FOG product is 30-120° away from the heating platform.

[0020] The positioning portion is a "V"-shaped groove hollowed out on the heating platform, and the depth of the "V"-shaped groove is 0.8-1.5 cm;

[0021] The support portion is a support plate, the top surface of the support plate is an inclined surface, the inclined surface is arranged toward the heating platform, an anti-slip layer is arranged on the inclined surface, and the height of the support plate is 4-8 cm;

[0022] The main frame forms an insertion hole corresponding to the support plate, and a threaded hole is provided on the side of the insertion hole away from the heating platform. The bottom of the support plate is inserted into the insertion hole, and a screw passes through the threaded hole and abuts against the side of the support plate, thereby fixing and locking the support plate. The depth of the bottom of the support plate inserted into the insertion hole is adjustable;

[0023] The heating platform is a heat-conducting metal plate, a heating tube is arranged under the heat-conducting metal plate, and the heating platform is also provided with a switch and a temperature regulating device respectively connected to the heating control circuit;

[0024] An isolation groove is arranged between the periphery of the mounting platform and the main frame, and the top surface of the heating platform is arranged lower than the top surface of the main frame.

[0025] Furthermore, the cleaning liquid is an ACF removal liquid, and after cleaning with the ACF removal liquid, the method further includes: using anhydrous ethanol to wipe the FPC gold finger area and the step of the liquid crystal glass.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The FPC and liquid crystal glass of FOG products with poor binding can be recycled and reused, reducing the waste of raw materials and achieving energy-saving production.

[0028] (2) The positioning part and the supporting part cooperate to make the liquid crystal glass of the FOG product form a certain angle with the heating platform, and maintain this state in subsequent operations to avoid damage to the liquid crystal glass during the heating process.

[0029] (3) After the FPC is disassembled, the gold finger part is heated and smoothed on a heating platform, which solves the problem that the FPC directly torn off in the prior art is warped and cannot be reworked.

[0030] (4) Use the heating platform to adjust the appropriate heating temperature and the appropriate heating time to soften the ACF glue so that the FPC and LCD panel can be easily disassembled. It takes less time and will not cause high temperature damage to the disassembled parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the FPC rework jig of the present invention.

[0032] Figure 2 It is a schematic diagram of the process of the FPC rework method of the present invention. DETAILED DESCRIPTION

[0033] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] like Figure 1 As shown, the present invention is a FPC rework jig, which includes: a main frame 20, a heating control circuit (not shown), a heating platform 10 and a support part 22. A mounting platform 30 is formed on the main frame 20, the heating platform 10 is arranged on the mounting platform 30, the heating control circuit is arranged inside the mounting platform 30, and the heating control circuit is electrically connected to the heating platform 10 to control the working temperature of the heating platform 10. The support part 22 is arranged on one side of the main frame 20. The working temperature of the heating platform 10 is 100-200°C. A positioning part 21 is provided on the heating platform 10. The positioning part 21 cooperates with the support part 22 so that when the FOG product to be disassembled is placed on the heating platform 10, the liquid crystal glass of the FOG product is 30-120° with the heating platform 10. Through the FPC rework jig, the liquid crystal glass is at a certain angle with the heating platform 10, the high temperature of the heating platform 10 will not damage it, and it is convenient to take and put, which provides convenience for the work of the operator. The FPC bound to the bottom of the liquid crystal glass is placed flat on the heating platform 10 for heating. After the ACF glue is softened, the FPC can be torn off the liquid crystal glass, thereby realizing the disassembly of the badly bound FOG product.

[0035] Specifically, the positioning portion 21 is a "V"-shaped groove or arc groove hollowed out on the heating platform, or it can be a groove of other shapes. The depth of the "V"-shaped groove or arc groove is 0.8-1.5 cm. In this embodiment, the positioning portion 21 is a "V"-shaped groove, which is convenient for accommodating and stabilizing the bottom end of the FOG product so that it will not slide on the heating platform during the heating process to meet the requirements. The support portion 22 is a support plate, which is made of non-heat-conductive material, such as wood or plastic material, and is fixed on the workbench outside the heating platform 10. The top surface of the support plate is an inclined surface, and the inclined surface is set toward the side of the heating platform 10. When the FOG product is placed, its bottom surface is pressed against the inclined surface, and its bottom end is placed in the "V"-shaped groove 21. The support portion 22 cooperates with the positioning portion 21 to support and fix the FOG product to be disassembled, and does not require manual hand-held fixation, thereby improving work efficiency and reducing the labor intensity of workers. The slope is also provided with an anti-skid layer 23 to prevent skidding and further stabilize the FOG product. According to the distance between the support plate and the heating platform 10 and the length of the FOG product, the height of the support plate is set to 4-8 cm, which well meets the production requirements.

[0036] In a preferred embodiment, the angle between the two walls of the "V"-shaped groove is 120°, the liquid crystal glass and the heating platform are 30°, and the inclined surface of the support plate is parallel to one wall of the corresponding "V"-shaped groove, that is, after the product is placed, the inclined surface is tightly attached to the back of the FOG. This setting has a good fixing effect on the FOG to be disassembled, and the FPC is bent upward in the "V"-shaped groove and then placed flat on the heating platform for heating. The ACF binding area is fully heated and the required heating time is shortened.

[0037] In another preferred embodiment, the support portion 22 can be mounted on the main frame 20 with a fixed height, and can also be mounted on the main frame 20 with an adjustable height. Specifically, the main frame 20 forms an insertion hole (not shown) corresponding to the support plate, and a threaded hole (not shown) is provided on the side of the insertion hole away from the heating platform 10. The bottom of the support plate is inserted into the insertion hole, and a screw passes through the threaded hole and abuts against the side of the support plate, thereby fixing and locking the support plate, so that the depth of the bottom of the support plate inserted into the insertion hole is adjustable, so that the height of the support plate can be adjusted according to the size of the liquid crystal glass to meet the needs of products of different sizes.

[0038] The heating platform 10 is a heat-conducting metal plate, such as a copper plate or a stainless steel plate, etc. A heating tube (not shown) is provided under the heat-conducting metal plate to heat the heat-conducting metal plate. The heating platform 10 is also provided with a switch 11 and a temperature regulating device 12 respectively connected to the heating control circuit. The temperature regulating device 12 is internally connected to the heating control circuit to facilitate heating and temperature regulation of the heating platform 10. The heating control circuit also includes a temperature sensing circuit for sensing the temperature of the heating platform. When the temperature of the heating platform 10 decreases or is just turned on, the heating control circuit turns on the heating tube and the heating platform heats up. When the temperature of the heating platform 10 reaches the required temperature, the heating control circuit detects the current temperature of the heating platform 10 in real time through the temperature sensing circuit, disconnects the heating tube, and the heating platform 10 stops heating; when the heating platform 10 cools naturally and the temperature is lower than the required temperature, the heating control circuit detects the current temperature of the heating platform 10 in real time through the temperature sensing circuit, turns on the heating tube, and the heating platform continues to heat. This cycle continues, thereby ensuring that the temperature of the heating platform 10 remains at the required temperature.

[0039] It is worth mentioning that an isolation groove 40 is provided between the periphery of the mounting platform 30 and the main frame 20 to achieve heat insulation. The top surface of the heating platform 10 is lower than the top surface of the main frame 20 to facilitate operation by operators and prevent burns from the heating platform 10.

[0040] Please refer to Figure 1 and Figure 2 The present invention also provides a reworking method of an FPC, comprising the following steps:

[0041] Step 1. Turn on the switch of the rework fixture and adjust the working temperature of the heating platform to the required temperature. Generally, the temperature of the heating platform is set at 140-160°C. Please see the following table for the heating time at different temperatures and the status record of the FPC and LCD panel after disassembly. It can be seen that when the temperature is 150°C and the heating time is 6 seconds, the conditions of the FPC and LCD panel after disassembly are good and the time is the least, which is the optimal time and temperature combination.

[0042]

[0043]

[0044] The rework jig is the rework jig described above. It includes: a main frame 20, a heating control circuit, a heating platform 10 and a support portion 22. A mounting platform 30 is formed on the main frame 20. The heating platform 10 is arranged on the mounting platform 30. The heating control circuit is arranged inside the mounting platform 30. The heating control circuit is electrically connected to the heating platform 10. The support portion 22 is arranged on one side of the main frame 20. The working temperature of the heating platform 10 is 100-200°C. A positioning portion 21 is provided on the heating platform 10. The positioning portion 21 cooperates with the support portion 22 so that when the FOG product to be disassembled is placed on the heating platform 10, the liquid crystal glass of the FOG product is 30-120° with the heating platform 10. The positioning portion 21 is a "V"-shaped groove hollowed out on the heating platform, and the depth of the "V"-shaped groove is 0.8-1.5cm; the support portion 22 is a support plate, and the top surface of the support plate is an inclined surface, and the inclined surface is arranged toward the side of the heating platform 10. The inclined surface is provided with an anti-slip layer 23, and the height of the support plate is 4-8cm. In addition to the above-mentioned fixed installation height, the support portion 22 can also be installed on the main frame 20 with an adjustable installation height. Specifically, the main frame 20 forms an insertion hole corresponding to the support plate, and the insertion hole is provided with a threaded hole on the side away from the heating platform 10. The bottom of the support plate is inserted into the insertion hole, and a screw passes through the threaded hole and abuts against the side of the support plate, thereby fixing and locking the support plate, and the depth of the bottom of the support plate inserted into the insertion hole is adjustable. The heating platform 10 is a heat-conducting metal plate, a heating tube is arranged under the heat-conducting metal plate, and the heating platform 10 is also provided with a switch and a temperature regulating device respectively connected to the heating control circuit; an isolation groove 40 is arranged between the outer periphery of the mounting platform 30 and the main frame, and the top surface of the heating platform 10 is arranged lower than the top surface of the main frame 20.

[0045] Step 2: When the heating platform is heated to the required temperature, the liquid crystal glass of the FOG product to be disassembled is placed at a certain angle to the heating platform, and the FPC is placed horizontally on the heating platform, and heated for 5-7 seconds; a positioning portion 21 is provided on the heating platform 10, and the positioning portion 21 cooperates with the supporting portion 22 so that when the FOG product to be disassembled is placed on the heating platform 10, its liquid crystal glass is 30-120° with the heating platform 10 to prevent the liquid crystal panel from being damaged by high temperature.

[0046] Step 3. Gently tear off the FPC from top to bottom, and then place the gold finger area of ​​the torn FPC flat on the heating platform. After heating for 2-3 seconds, the gold finger area softens under the action of high temperature. Take the opportunity to smooth the FPC so that it can be bound again.

[0047] Step 4: Clean the FPC and LCD panel separated in step 3 with ACF removal liquid. You can soak the FPC and LCD panel in the ACF removal liquid for 3-5 minutes, or use a cotton swab dipped in the ACF removal liquid to wipe the FPC gold finger area and the steps of the LCD glass to remove the AFC glue.

[0048] Step 5: Preferably, after step 4, use a cotton swab dipped in anhydrous ethanol to wipe the FPC gold finger area and the steps of the liquid crystal glass to remove the debris and dust remaining on the surface.

[0049] Step 6: Use a microscope to check whether the circuits in the FPC gold finger area and the steps of the LCD glass are clean; and / or, check whether the FPC binding circuits are bent or deformed.

[0050] Step 7: Rebind the clean FPC to the liquid crystal glass of the FOG product to achieve the rework and use of the FPC.

[0051] In summary, the FPC rework jig and the FPC rework method of the present invention, by providing a heating platform, providing a support portion, and providing a fixing portion on the heating platform, place the liquid crystal panel of the FOG product to be disassembled at a certain angle to the heating platform to avoid damage to the liquid crystal panel during the heating process. The FPC rework method of the present invention enables the liquid crystal panel and FPC after disassembly of defective FOG products to be reworked and reused, with a high success rate, greatly reducing the waste of raw materials, and enabling enterprises and factories to achieve green, environmentally friendly and energy-saving production. The FPC rework jig of the present invention has a simple structure and low manufacturing cost. The FPC rework method of the present invention is simple and easy to operate, but it achieves the rework and reuse of defective FOG products, and is worthy of vigorous promotion and use.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An FPC rework jig, characterized in that: include: A main frame, a heating control circuit, a heating platform and a support part, wherein a mounting platform is formed on the main frame, the heating platform is arranged on the mounting platform, the heating control circuit is arranged inside the mounting platform, the heating control circuit is electrically connected to the heating platform, the support part is arranged on one side of the main frame, the working temperature of the heating platform is 100-200°C, a positioning part is arranged on the heating platform, the positioning part cooperates with the support part so that when the FOG product to be disassembled is placed on the heating platform, the liquid crystal glass of the FOG product is 30-120° with the heating platform; The positioning portion is a "V"-shaped groove or an arc-shaped groove hollowed out on the heating platform, and the depth of the "V"-shaped groove or the arc-shaped groove is 0.8-1.5 cm; The heating platform is a heat-conducting metal plate, a heating tube is arranged under the heat-conducting metal plate, and the heating platform is also provided with a switch and a temperature regulating device respectively connected to the heating control circuit; An isolation groove is arranged between the periphery of the mounting platform and the main frame, and the top surface of the heating platform is arranged lower than the top surface of the main frame.

2. The FPC rework jig according to claim 1, characterized in that: The support portion is a support plate, the top surface of the support plate is an inclined surface, the inclined surface is arranged toward the heating platform, an anti-slip layer is arranged on the inclined surface, and the height of the support plate is 4-8 cm.

3. The FPC rework jig according to claim 2, characterized in that: The main frame forms an insertion hole corresponding to the support plate, and a threaded hole is provided on the side of the insertion hole away from the heating platform. The bottom of the support plate is inserted into the insertion hole, and a screw passes through the threaded hole and abuts against the side of the support plate, thereby fixing and locking the support plate. The depth of the bottom of the support plate inserted into the insertion hole is adjustable.

4. A reworking method for FPC, characterized in that: The following steps are involved: Turn on the rework fixture and adjust the working temperature of the heating platform to the required temperature; When the heating platform is heated to the required temperature, place the liquid crystal glass of the FOG product to be disassembled at a certain angle to the heating platform, and place the FPC horizontally on the heating platform, and keep heating for the first time; Tear off the FPC from top to bottom, place the gold finger area of ​​the torn FPC flat on the heating platform, and smooth the FPC after heating for a second time; Use cleaning fluid to clean the FPC gold finger area and the steps of the liquid crystal glass to remove the AFC glue; the rework fixture includes: a main frame, a heating control circuit, a heating platform and a support part, a mounting platform is formed on the main frame, the heating platform is arranged on the mounting platform, the heating control circuit is arranged inside the mounting platform, the heating control circuit is electrically connected to the heating platform, the support part is arranged on one side of the main frame, the working temperature of the heating platform is 100-200°C, a positioning part is arranged on the heating platform, the positioning part cooperates with the support part so that when the FOG product to be disassembled is placed on the heating platform, the liquid crystal glass of the FOG product and the heating platform are 30-120°; The positioning portion is a "V"-shaped groove hollowed out on the heating platform, and the depth of the "V"-shaped groove is 0.8-1.5 cm; The heating platform is a heat-conducting metal plate, a heating tube is arranged under the heat-conducting metal plate, and the heating platform is also provided with a switch and a temperature regulating device respectively connected to the heating control circuit; An isolation groove is arranged between the periphery of the mounting platform and the main frame, and the top surface of the heating platform is arranged lower than the top surface of the main frame.

5. The FPC rework method according to claim 4, characterized in that: Also includes the steps: Use a microscope to check whether the circuits in the FPC gold finger area and the steps of the LCD glass are clean; and / or check whether the FPC binding circuits are bent or deformed; Re-bond the clean FPC to the LCD glass of the FOG product.

6. The FPC rework method according to claim 4 or 5, characterized in that: The required temperature is 100-200°, the first time is 5-7 seconds, and the second time is 2-3 seconds.

7. The FPC rework method according to claim 6, characterized in that: The support portion is a support plate, the top surface of the support plate is an inclined surface, the inclined surface is arranged toward the heating platform, an anti-slip layer is arranged on the inclined surface, and the height of the support plate is 4-8 cm; The main frame forms an insertion hole corresponding to the support plate, and a threaded hole is provided on the side of the insertion hole away from the heating platform. The bottom of the support plate is inserted into the insertion hole, and a screw passes through the threaded hole and abuts against the side of the support plate, thereby fixing and locking the support plate. The depth of the bottom of the support plate inserted into the insertion hole is adjustable.

8. The FPC rework method according to claim 4, characterized in that: The cleaning liquid is an ACF removal liquid, and after cleaning with the ACF removal liquid, the method further includes: using anhydrous ethanol to wipe the FPC gold finger area and the steps of the liquid crystal glass.

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