A jig for drying a flexible wiring board

Abstract

The application discloses a kind of flexible circuit board drying jigs, belong to circuit board processing equipment technical field.Mainly include: drying cabinet, the drying cabinet includes box, the inside of the box is provided with inner bag, and space is left between box and inner bag, the inside of the inner bag is separated by partition and multiple cavities, each cavity is provided with tray, and the side wall of inner bag is provided with mesh at cavity corresponding place;Hot air assembly, it is installed in the side of the drying cabinet, including main air pipe, the main air pipe is communicated with each cavity and has auxiliary air pipe;Opening and closing component, including sliding sleeve and being connected in the outside of box follower rod, one end of the follower rod is inserted into inner bag and is fixed with magnetic block two, and the other end is fixed with valve plate and is inserted into auxiliary air pipe.In the application, by setting opening and closing component, the automatic opening and closing of auxiliary air pipe is realized, and heat loss and energy waste are reduced;Multiple independent cavity design can simultaneously dry multiple groups of circuit board, and the drying efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of circuit board processing equipment technology, specifically a fixture for drying flexible circuit boards. Background Technology

[0002] Flexible printed circuit boards (FPCBs) are characterized by their thinness, flexibility, and resistance to high and low temperatures, making them widely used in electronic devices. During the production and processing of FPCBs, after cleaning and coating processes, a drying process is required to remove moisture or solvents from the board surface, ensuring the quality of subsequent processing. Most existing FPCB drying fixtures employ an integrated drying oven structure, achieving drying through hot air circulation.

[0003] For example, patent application number CN202422592690.6 provides a fixture for drying flexible circuit boards, which includes: a housing, an insulated door, a support component, a fixing component, a drying component, and a hot air blower. This utility model facilitates the placement and removal of circuit boards within the device, improving its portability and preventing burns to workers during handling.

[0004] However, when using this device, because the hot air channels inside the drying chamber are fixed, hot air will still be introduced into the areas where no circuit boards are placed when only some circuit boards need to be dried, resulting in energy waste. In addition, the entire hot air system needs to be turned off or the chamber door needs to be opened when taking out or placing the tray, which causes a large amount of heat to be lost from the chamber, which not only reduces the drying efficiency but also affects the drying effect of the circuit boards that have been placed on them.

[0005] Therefore, it is necessary to provide a fixture for drying flexible circuit boards to solve the above problems.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0007] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is: to provide a fixture for drying flexible circuit boards, which realizes the automatic opening and closing of the auxiliary air duct by setting an opening and closing component, thereby reducing heat loss and energy waste; the design of multiple independent cavities can dry multiple circuit boards at the same time, improving drying efficiency and adapting to the batch processing needs of flexible circuit boards.

[0008] The technical solution adopted by this application to solve its technical problem is: a fixture for drying flexible circuit boards, comprising: A drying oven, comprising a box body, an inner liner inside the box body, and a space between the box body and the inner liner. The inner liner is divided into multiple cavities by partitions, and each cavity is provided with a tray. Mesh openings are provided on the side walls of the inner liner corresponding to the cavities. A hot air assembly is installed on one side of the drying chamber, including a main air duct, and the main air duct is connected to auxiliary air ducts in each cavity; The opening and closing assembly corresponds one-to-one with the tray, including a follower rod that slides onto the outside of the box. One end of the follower rod extends into the inner liner and is fixed with a magnetic block two, while the other end is fixed with a valve plate that extends into the auxiliary air duct.

[0009] Furthermore, when the tray is completely placed in the cavity, the valve plate is in the open state, and both ends of the valve plate are fixedly connected to a stop block. The stop block near the follower rod is located outside the secondary air duct, and the other stop block is located inside the secondary air duct.

[0010] Furthermore, the tray includes a mesh plate, a cover plate is fixedly connected to the front end of the mesh plate, a handle is fixedly connected to the outer side of the cover plate, support strips are fixedly connected to both sides of each cavity, the mesh plate slides between two support strips, and a magnetic block is fixedly embedded at the rear end of the mesh plate corresponding to the magnetic block two.

[0011] Furthermore, the front end face of the inner liner is open and fitted with a sealing plate. The sealing plate has multiple openings evenly spaced apart. The cover plate covers the outside of each opening, and a sealing ring is fixedly embedded on the end face of the cover plate facing the sealing plate.

[0012] Furthermore, one end of the secondary air duct is fixedly connected to an air outlet, which is horn-shaped and extends into the interior of the housing, covering the outer perimeter of the corresponding mesh. One end of the main air duct is equipped with a heating box, and the air inlet end of the heating box is equipped with a fan.

[0013] Furthermore, an insulated door is rotatably connected to the front end face of the box.

[0014] Furthermore, an exhaust vent is fixedly connected to the upper end face of the box, and the exhaust vent communicates with the space between the box and the inner liner.

[0015] The beneficial effects of this application are as follows: The flexible circuit board drying fixture provided by this application realizes the synchronous control of tray placement and secondary air duct opening and closing by setting opening and closing components. When the tray is pushed in, the valve plate opens and hot air enters the corresponding cavity. When the tray is pulled out, the valve plate closes, reducing heat loss and energy waste. Multiple independent cavities can dry multiple sets of flexible circuit boards at the same time, and each cavity is sealed independently to avoid hot air crossflow, improve drying efficiency and uniformity, and can adapt to the batch drying processing needs of flexible circuit boards, improving the practicality and economy of the equipment.

[0016] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a fixture for drying flexible circuit boards according to this application; Figure 2 This is a schematic diagram of the opening structure of the heat-insulating door of a flexible circuit board drying fixture according to this application; Figure 3 This is a schematic diagram of the internal structure of the inner liner of a flexible circuit board drying fixture according to this application. Figure 4 This is a cross-sectional structural schematic diagram of the housing of a flexible circuit board drying fixture according to this application; Figure 5 This is a schematic diagram of the opening and closing assembly of a flexible circuit board drying fixture according to this application; The following are the labeling elements in the figure: 1. Drying oven; 11. Oven body; 12. Insulated door; 13. Inner liner; 14. Sealing plate; 15. Exit; 16. Tray; 161. Mesh plate; 162. Cover plate; 163. Sealing ring; 164. Magnetic block one; 17. Mesh; 18. Support strip; 19. Partition; 2. Hot air assembly; 21. Main air duct; 22. Secondary air duct; 23. Air outlet; 24. Heating box; 25. Fan; 3. Opening and closing assembly; 31. Follow-up rod; 32. Magnetic block two; 33. Valve plate; 34. Baffle; 4. Exhaust vent. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] like Figure 1-5 As shown, this application provides a fixture for drying flexible circuit boards, including a drying box 1. The drying box 1 provides a closed environment for the drying process. The drying box 1 includes a box body 11. The front end of the box body 11 is rotatably connected to an insulated door 12 via a hinge, which can achieve a good heat preservation effect.

[0021] The interior of the box 11 is provided with an inner liner 13. There is a space between the box 11 and the inner liner 13 to form an insulation layer. The interior of the inner liner 13 is divided into multiple independent cavities by multiple partitions 19. The number of cavities can be designed according to actual needs. Each cavity is provided with a tray 16 for placing the flexible circuit board to be dried.

[0022] The inner liner 13 has multiple mesh holes 17 on both sides corresponding to the position of each cavity. The mesh holes 17 are distributed in a matrix to facilitate the entry of hot air into the cavity and through the tray 16 to achieve uniform drying of the circuit board. The front end face of the inner liner 13 is open and fixedly installed with a sealing plate 14. Multiple openings 15 are evenly spaced on the sealing plate 14. The size of the openings 15 is adapted to the cross-sectional size of the tray 16 to allow the tray 16 to enter and exit the cavity.

[0023] The tray 16 includes a wire mesh 161 made of stainless steel wire mesh to ensure smooth penetration of hot air. A cover plate 162 is welded to the front end of the wire mesh 161. The size of the cover plate 162 is larger than the opening 15. A handle is welded to the outside of the cover plate 162 to facilitate pushing and pulling the tray 16.

[0024] A sealing ring 163 is fixedly embedded on the end face of the cover plate 162 facing the sealing plate 14. When the tray 16 is fully pushed into the cavity, the cover plate 162 covers the outside of the opening 15, and the sealing ring 163 fits tightly with the sealing plate 14 to enhance the cavity sealing.

[0025] Each cavity has a support strip 18 welded and fixed on both sides. The mesh plate 161 is slidably set between two support strips 18. The support strips 18 provide stable support for the tray 16, ensuring that the tray 16 can be pushed and pulled smoothly. A magnetic block 164 is fixedly embedded at the rear end of the mesh plate 161.

[0026] A hot air assembly 2 is installed on one side of the drying chamber 1. The hot air assembly 2 includes a main air duct 21. A heating box 24 is fixedly installed at one end of the main air duct 21. The heating box 24 is equipped with an electric heating wire, which can heat the airflow to a preset temperature. A fan 25 is fixedly installed at the air inlet of the heating box 24. The fan 25 is a centrifugal fan, which provides continuous and stable airflow power.

[0027] Multiple secondary air ducts 22 are fixedly connected to the main air duct 21. The number of secondary air ducts 22 is the same as the number of cavities. One end of the secondary air duct 22 penetrates the side wall of the housing 11 and extends into the interior of the housing 11. An air outlet 23 is welded and fixed to one end of the secondary air duct 22. The air outlet 23 is trumpet-shaped and covers the outer perimeter of the corresponding mesh 17, which can expand the hot air coverage area and ensure that the hot air enters the cavity evenly through the mesh 17.

[0028] Multiple opening and closing components 3 are provided on the outside of the housing 11. Each opening and closing component 3 corresponds to a tray 16. Each component includes a follower rod 31, which is slidably sleeved in a sliding seat on the outside of the housing 11. One end of the follower rod 31 extends into the inner liner 13 and is fixed with a magnetic block 32. The magnetic block 32 and the magnetic block 164 attract each other, realizing the synchronous movement of the tray 16 and the follower rod 31. A valve plate 33 is welded and fixed to the other end of the follower rod 31. The valve plate 33 extends into the secondary air duct 22. The size of the valve plate 33 is adapted to the inner diameter of the secondary air duct 22, and the secondary air duct 22 can be opened and closed by sliding.

[0029] Both ends of the valve plate 33 are welded and fixed with stop blocks 34. The stop block 34 near the follower rod 31 is located outside the secondary air duct 22, and the other stop block 34 is located inside the secondary air duct 22. The stop blocks 34 can limit the sliding stroke of the valve plate 33, prevent the valve plate 33 from extending too far into or out of the secondary air duct 22, and also seal the gap between the valve plate 33 and the secondary air duct 22.

[0030] When the tray 16 is fully placed in the cavity, magnetic block 164 and magnetic block 32 attract each other, causing the follower rod 31 and valve plate 33 to move. At this time, the valve plate 33 is in the open state, and hot air can smoothly enter the cavity through the auxiliary air duct 22. When the tray 16 is pulled out, since magnetic block 164 and magnetic block 32 are attracted to each other, the follower rod 31 will move with the tray 16, causing the valve plate 33 to close the auxiliary air duct 22, reducing heat loss. After the valve plate 33 is completely closed, since the follower rod 31 can no longer move, continuing to pull the tray 16 will cause magnetic block 164 and magnetic block 32 to separate, thereby removing the tray 16.

[0031] An exhaust port 4 is welded and fixed to the upper end face of the box 11. The exhaust port 4 is connected to the space between the box 11 and the inner liner 13. The moisture and exhaust gas generated during the drying process enter the space between the box 11 and the inner liner 13 through the mesh 17 of the inner liner 13, and are then discharged through the exhaust port 4 to maintain a dry environment inside the box.

[0032] Working principle: Before use, open the heat preservation door 12, pull out each tray 16 by the handle, and lay the flexible circuit board to be dried flat on the mesh plate 161. Note that there should be gaps between the circuit boards to ensure that the hot air can penetrate evenly.

[0033] Push the tray 16 into the cavity along the support strip 18 until the sealing ring 163 on the cover plate 162 is tightly fitted with the sealing plate 14. At this time, the magnetic block 164 at the rear end of the mesh plate 161 and the magnetic block 32 on the follower rod 31 attract each other, driving the follower rod 31 and the valve plate 33 to move. The valve plate 33 is in the open state, and the secondary air duct 22 is connected.

[0034] Close the insulation door 12, start the fan 25 and heating box 24. The fan 25 draws outside air into the heating box 24, and after being heated by the electric heating wire, it forms hot air. The hot air is distributed to each auxiliary air duct 22 through the main air duct 21, and then enters each cavity through the horn-shaped air outlet 23 and the mesh 17 of the inner liner 13. It passes through the mesh plate 161 to dry the flexible circuit board.

[0035] Moisture and exhaust gas generated during the drying process enter the space between the box 11 and the inner liner 13 through the mesh 17, and are then discharged through the exhaust port 4.

[0036] If a circuit board needs to be added or removed midway, simply pull out the corresponding tray 16. The magnetic block 164 and the magnetic block 32 will separate, and the follower rod 31 will reset, causing the valve plate 33 to close the auxiliary air duct 22 corresponding to the cavity. The drying of other cavities will not be affected, reducing heat loss and energy waste.

[0037] After drying is complete, turn off the fan 25 and the heating box 24, open the insulation door 12, pull out the tray 16, and take out the dried flexible circuit board.

[0038] 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 fixture for drying flexible circuit boards, characterized in that, include: A drying oven (1) includes a box body (11), an inner liner (13) is provided inside the box body (11), and there is space between the box body (11) and the inner liner (13). The inner liner (13) is divided into multiple cavities by partitions (19), and each cavity is provided with a tray (16). Mesh holes (17) are opened on both sides of the inner liner (13) corresponding to the cavities. Hot air assembly (2), which is installed on one side of the drying box (1), includes a main air duct (21), and the main air duct (21) is connected to each cavity by a secondary air duct (22). The opening and closing assembly (3) corresponds one-to-one with the tray (16) and includes a follower rod (31) that is slidably sleeved on the outside of the box (11). One end of the follower rod (31) extends into the inner liner (13) and is fixed with a magnetic block (32), and the other end is fixed with a valve plate (33) that extends into the auxiliary air duct (22).

2. The fixture for drying flexible circuit boards according to claim 1, characterized in that: When the tray (16) is completely placed in the cavity, the valve plate (33) is in the open state. Both ends of the valve plate (33) are fixedly connected with blocks (34). The block (34) near the follower rod (31) is located outside the secondary air duct (22), and the other block (34) is located inside the secondary air duct (22).

3. The fixture for drying flexible circuit boards according to claim 2, characterized in that: The tray (16) includes a mesh plate (161), a cover plate (162) is fixedly connected to the front end of the mesh plate (161), a handle is fixedly connected to the outer side of the cover plate (162), and a support strip (18) is fixedly connected to both sides of each cavity. The mesh plate (161) slides between the two support strips (18), and a magnetic block (164) is fixedly embedded at the rear end of the mesh plate (161) corresponding to the magnetic block two (32).

4. The fixture for drying flexible circuit boards according to claim 3, characterized in that: The inner liner (13) has an opening at the front end and is fitted with a sealing plate (14). The sealing plate (14) has multiple openings (15) spaced evenly apart. The cover plate (162) covers the outside of each opening (15), and a sealing ring (163) is fixedly embedded on the end face of the cover plate (162) facing the sealing plate (14).

5. The fixture for drying flexible circuit boards according to claim 1, characterized in that: One end of the secondary air duct (22) is fixedly connected to an air outlet (23). The air outlet (23) is horn-shaped and extends into the box (11), and covers the outer perimeter of the corresponding mesh (17). One end of the main air duct (21) is equipped with a heating box (24), and the air inlet end of the heating box (24) is equipped with a fan (25).

6. The fixture for drying flexible circuit boards according to claim 1, characterized in that: The front end face of the box (11) is rotatably connected to an insulated door (12).

7. The fixture for drying flexible circuit boards according to claim 1, characterized in that: An exhaust port (4) is fixedly connected to the upper end face of the box (11), and the exhaust port (4) is connected to the space between the box (11) and the inner liner (13).

Images