Double-layer FPC etching device with double roll synchronization processing

Abstract

The utility model discloses a double -layer FPC etching device of double roll synchronous processing, including the roll -out machine for unwinding FPC and be used for the winding -up machine of winding FPC, the roll -out machine is with the winding -up machine between and is provided with developing device, first water washing device, etching device, second water washing device, stripping device and third water washing device along the feeding direction of FPC in proper order, first water washing device, second water washing device and third water washing device all have the two -layer structure of upper and lower, are used for accommodating two roll FPC through respectively, the utility model discloses compared with original equipment only increased low -cost water washing device and the double -layer structure of drying device, and equipment cost increases little, can make equipment when producing single -sided FPC and the production capacity reaches the double of original equipment, greatly promote equipment investment efficiency, two roll single -sided FPC simultaneous production can also greatly reduce the use of liquid medicine, electric energy, reduce equipment investment number, reduce the factory building space occupancy.

Description

Technical Field

[0001] This utility model relates to the field of PCB etching technology, specifically a dual-layer FPC etching device for simultaneous dual-roll processing. Background Technology

[0002] Conventional FPC etching equipment typically consists of three chemical processing sections (development, etching, and stripping) plus a washing and drying section. The chemical processing and washing use simultaneous top and bottom spraying to support double-sided FPC production. However, this design can only produce one roll of single-sided FPC, and the double-sided processing capability cannot be fully utilized. This approach has the following problems:

[0003] 1. When producing single-sided FPCs, double-sided spraying is used. The chemicals in the developing, etching, and stripping stages are also applied to both sides of the FPC, which wastes energy and chemicals.

[0004] 2. Etching equipment is a large-scale piece of equipment with high initial cost and maintenance expenses, resulting in significant investment waste when producing single-sided FPCs;

[0005] 3. Investing in multiple pieces of equipment requires a large amount of factory space;

[0006] Therefore, there is an urgent need to design a dual-layer FPC etching device with simultaneous dual-roll processing to improve the above problems. Utility Model Content

[0007] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a dual-roll synchronous processing dual-layer FPC etching device, which aims to solve the problem that the existing etching device for producing double-sided FPC can only produce one roll when producing single-sided FPC, and the function of double-sided processing cannot be fully utilized, resulting in waste of energy and chemicals and significant investment waste.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A dual-roll synchronous processing double-layer FPC etching apparatus includes a roll-out machine for unwinding FPC and a winding machine for rewinding FPC. A developing device, a first washing device, an etching device, a second washing device, a peeling device, and a third washing device are sequentially arranged between the roll-out machine and the winding machine along the feeding direction of the FPC. The first washing device, the second washing device, and the third washing device each have an upper and lower two-layer structure, which are used to accommodate two rolls of FPC passing through.

[0010] As a preferred embodiment of this utility model, the winding machine is provided with two unwinding rollers for simultaneously unwinding two rolls of FPC, and the winding machine is provided with two winding rollers for simultaneously winding two rolls of FPC.

[0011] As a preferred technical solution of this utility model, both the unwinding machine and the winding machine are equipped with tension adjustment mechanisms to adjust the tension of the FPC unwinding and winding.

[0012] As a preferred technical solution of this utility model, a drying device is provided between the third washing device and the winding machine. The drying device also has an upper and lower two-layer structure, which are used to accommodate two rolls of FPC passing through.

[0013] As a preferred technical solution of this utility model, the developing device, the first washing device, the etching device, the second washing device, the peeling device, the third washing device, and the drying device are all rotatably connected to multiple guide wheels along the FPC conveying path. The two rolls of FPC are merged into one layer in the developing device, the etching device, and the peeling device, and the two rolls of FPC are attached back to back. The two rolls of FPC are separated into two layers in the first washing device, the second washing device, the third washing device, and the drying device, and are placed in the upper and lower layer structures respectively.

[0014] As a preferred embodiment of this utility model, the developing device, the first washing device, the etching device, the second washing device, the film stripping device, and the third washing device are all equipped with spray liquid treatment tanks inside.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention, when etching single-layer double-sided FPCs, combines two FPCs back-to-back with their processing surfaces facing outwards to form a double-sided FPC processing method. Simultaneously, the processing surfaces of the two FPCs undergo three stages of chemical treatment: development, etching, and film stripping. The two FPCs are then separated by the upper and lower layers of a first, second, and third washing device and a drying device, ensuring effective washing and drying. Compared to existing equipment, this method only adds a low-cost double-layer structure for the washing and drying devices, resulting in a minimal increase in equipment cost. This allows the equipment to double the production capacity of single-sided FPCs, significantly improving investment efficiency. Simultaneous production of two rolls of single-sided FPCs also significantly reduces the use of chemicals and electricity, decreases the number of equipment units required, and reduces factory space occupancy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a dual-layer FPC etching device for simultaneous dual-roll processing.

[0018] In the diagram: 1. Winding machine; 101. Unwinding reel; 2. Developing device; 3. First washing device; 4. Etching device; 5. Second washing device; 6. Stripping device; 7. Third washing device; 8. Drying device; 9. Winding machine; 901. Rewinding reel; 10. Tension adjustment mechanism. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Example: Please refer to Figure 1 This embodiment provides a dual-layer FPC etching apparatus for simultaneous dual-roll processing, including a roll-out machine 1 for unwinding the FPC and a take-up machine 9 for rewinding the FPC. Between the roll-out machine 1 and the take-up machine 9, along the FPC feeding direction, are sequentially arranged a developing device 2, a first washing device 3, an etching device 4, a second washing device 5, a stripping device 6, and a third washing device 7. The developing device 2 removes the unexposed dry film portion using a chemical developing solution, retaining the cured dry film to form a circuit pattern protective layer, thus fully exposing the copper foil area to be etched. The etching device 4 uses a chemical etching solution to dissolve the exposed copper foil not protected by the dry film, forming the designed conductive circuit pattern. The stripping device 6 uses a sodium hydroxide solution or a chemical solvent to peel off the residual dry film. The protective layer on the surface of the circuit is removed, exposing the final formed copper circuit. The first water washing device 3, the second water washing device 5, and the third water washing device 7 are used to wash the FPC to ensure surface cleanliness. The developing device 2, the first water washing device 3, the etching device 4, the second water washing device 5, the film stripping device 6, and the third water washing device 7 are existing technologies and will not be described in detail here. The first water washing device 3, the second water washing device 5, and the third water washing device 7 each have an upper and lower layer structure, each used to accommodate two rolls of FPC. When etching both layers of FPC simultaneously on one side, the two layers of FPC pass through the upper and lower layers of the first water washing device 3, the second water washing device 5, and the third water washing device 7 respectively, separating the two layers of FPC and ensuring the washing effect.

[0021] In this embodiment, the winding machine 1 is provided with two unwinding rollers 101 for simultaneously unwinding two rolls of FPC, and the winding machine 9 is provided with two winding rollers 901 for simultaneously winding two rolls of FPC. The two unwinding rollers 101 in the winding machine 1 and the two winding rollers 901 in the winding machine 9 can be used interchangeably. When etching a single-layer double-sided FPC, only one unwinding roller 101 and one winding roller 901 can be used for winding and unwinding the single-layer double-sided FPC. When etching a double-layer single-sided FPC, both unwinding rollers 101 and both winding rollers 901 need to be used, respectively for unwinding and winding one layer of FPC, thus providing two unwinding and winding methods for FPC.

[0022] In this embodiment, a drying device 8 is provided between the third washing device 7 and the winding machine 9. The drying device 8 also has an upper and lower two-layer structure, which are used to accommodate two rolls of FPC passing through. The drying device 8 is used to dry the FPC to remove residual moisture and prevent chemical corrosion or oxidation.

[0023] In this embodiment, multiple guide wheels are rotatably connected along the FPC conveying path in the developing device 2, the first washing device 3, the etching device 4, the second washing device 5, the stripping device 6, the third washing device 7, and the drying device 8. Two rolls of FPC merge into one layer in the developing device 2, the etching device 4, and the stripping device 6, and are placed back-to-back. The two rolls are then separated into two layers in the first washing device 3, the second washing device 5, the third washing device 7, and the drying device 8, and placed in upper and lower layers respectively. When etching a single-layer double-sided FPC, the developing device 2, the etching device 4, and the stripping device 6 can simultaneously perform three-stage chemical processing (developing, etching, and stripping) on ​​both sides of the FPC. The single-layer double-sided FPC can enter one of the layers in the first washing device 3, the second washing device 5, the third washing device 7, or the drying device 8. The process involves washing and drying. When etching single-layer double-sided FPCs, the two FPCs are placed back-to-back with their processing surfaces facing outwards, forming a double-sided FPC. Simultaneously, the processing surfaces of the two FPCs undergo three stages of chemical treatment: development, etching, and film stripping. The two FPCs are then separated by the upper and lower layers of the first washing unit 3, the second washing unit 5, the third washing unit 7, and the drying unit 8, ensuring effective washing and drying. Compared to the original equipment, this method only adds a low-cost double-layer structure for the washing and drying units, resulting in a minimal increase in equipment cost. This allows the equipment to double the production capacity of the original equipment when producing single-sided FPCs, significantly improving equipment investment efficiency. Simultaneous production of two rolls of single-sided FPCs also significantly reduces the use of chemicals and electricity, reduces the number of equipment units required, and minimizes factory space occupancy.

[0024] In this embodiment, both the unwinding machine 1 and the winding machine 9 are equipped with a tension adjustment mechanism 10, which is used to adjust the tension of the FPC unwinding and winding. Stabilizing the tension can prevent the FPC from shifting or warping due to uneven force, and ensure the accuracy of processes such as line etching, development, etching, and thin film. The tension adjustment mechanism 10 is existing technology and will not be described in detail here.

[0025] In this embodiment, the developing device 2, the first washing device 3, the etching device 4, the second washing device 5, the film stripping device 6, and the third washing device 7 are all equipped with spray liquid treatment tanks to collect spray liquid for reuse.

[0026] Working principle: When etching a single-layer double-sided FPC, one unwinding roller 101 of the winding machine 1 and one winding roller 901 of the winding machine 9 are used to unwind and rewind the single-layer double-sided FPC. The single-layer double-sided FPC passes through the developing device 2, the first washing device 3, the etching device 4, the second washing device 5, the stripping device 6, the third washing device 7, and the drying device 8 in sequence. The single-layer double-sided FPC passes through one of the first washing device 3, the second washing device 5, the third washing device 7, and the drying device 8 to complete the three-stage chemical treatment of developing, etching, and stripping on the two sides of the FPC.

[0027] When etching a double-layer single-sided FPC, the two unwinding rollers 101 in the winding machine 1 and the two take-up rollers 901 in the winding machine 9 respectively unwind and take up one layer of the single-layer double-sided FPC. The double-layer single-sided FPC sequentially passes through the developing device 2, the first washing device 3, the etching device 4, the second washing device 5, the peeling device 6, the third washing device 7, and the drying device 8. The double-layer single-sided FPC merges into one layer in the developing device 2, the etching device 4, and the washing device 5. The double-layer single-sided FPC passes through the first washing device 3, the second washing device 5, the third washing device 7, and the drying device 8. The flow is divided into two layers, passing through the upper and lower layers respectively, to complete the three-stage chemical treatment of the two FPC layers: development, etching, and film stripping. The flow also separates the two FPC layers to ensure the washing and drying effects. Compared with the original equipment, the double-layer structure only adds a low-cost washing and drying device, and the equipment cost increases by a small amount. It can double the production capacity of the original equipment when producing single-sided FPC, which greatly improves the efficiency of equipment investment. The simultaneous production of two rolls of single-sided FPC can also significantly reduce the use of chemical solutions and electricity, reduce the number of equipment units required, and reduce the factory space occupied.

[0028] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A dual-roll synchronous processing double-layer FPC etching apparatus, characterized in that: The device includes a rollout machine (1) for unwinding FPC and a take-up machine (9) for winding FPC. Between the rollout machine (1) and the take-up machine (9), along the feeding direction of the FPC, there are sequentially arranged a developing device (2), a first washing device (3), an etching device (4), a second washing device (5), a film peeling device (6), and a third washing device (7). The first washing device (3), the second washing device (5), and the third washing device (7) each have an upper and lower two-layer structure, which are used to accommodate two rolls of FPC passing through.

2. The dual-roll synchronous processing double-layer FPC etching apparatus according to claim 1, characterized in that: The winding machine (1) is equipped with two unwinding rollers (101) for simultaneously unwinding two rolls of FPC, and the winding machine (9) is equipped with two winding rollers (901) for simultaneously winding two rolls of FPC.

3. The dual-roll synchronous processing dual-layer FPC etching apparatus according to claim 2, characterized in that: Both the unwinding machine (1) and the winding machine (9) are equipped with tension adjustment mechanisms (10) for adjusting the tension of the FPC unwinding and rewinding.

4. The dual-roll synchronous processing dual-layer FPC etching apparatus according to claim 1, characterized in that: A drying device (8) is provided between the third washing device (7) and the winding machine (9). The drying device (8) also has an upper and lower two-layer structure, which are used to accommodate two rolls of FPC passing through.

5. The dual-roll synchronous processing dual-layer FPC etching apparatus according to claim 4, characterized in that: The developing device (2), the first washing device (3), the etching device (4), the second washing device (5), the peeling device (6), the third washing device (7), and the drying device (8) are all connected to multiple guide wheels that rotate along the FPC conveying path. The two rolls of FPC are merged into one layer in the developing device (2), the etching device (4), and the peeling device (6), and the two rolls of FPC are attached back to back. The two rolls of FPC are separated into two layers in the first washing device (3), the second washing device (5), the third washing device (7), and the drying device (8), and are placed in the upper and lower layer structures respectively.

6. The dual-roll synchronous processing dual-layer FPC etching apparatus according to claim 1, characterized in that: The developing device (2), the first washing device (3), the etching device (4), the second washing device (5), the film peeling device (6), and the third washing device (7) are all equipped with spray liquid treatment tanks.

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