CN-121865528-B - Roll-to-roll cleaning control method and system for electronic structural part of flexible circuit board

CN121865528BCN 121865528 BCN121865528 BCN 121865528BCN-121865528-B

Abstract

The invention discloses a roll-to-roll cleaning control method and a roll-to-roll cleaning control system for electronic structural members of a flexible circuit board, which relate to the technical field of electronic manufacturing and comprise the steps of carrying out partition treatment on a piece to be cleaned to obtain a thin area and a thick area; carrying out partition treatment on the drying cavity based on the thin area and the thick area, and constructing a partition temperature control method; the invention discloses a method for acquiring hot air drying based on a cold mirror dew point meter, which is used for solving the problems that in the existing roll-to-roll cleaning control method for electronic structural components of flexible circuit boards, differential temperature control is not carried out on thick and thin areas, influence of environmental humidity in a drying cavity on drying effect is not considered, overheating of a thin plate after drying is caused, water in the thick plate is not completely evaporated, and watermarks which cannot be wiped appear on the surfaces of the electronic structural components, so that the practicability of the electronic structural components after cleaning is influenced.

Inventors

WU XIPENG
WANG ZHENHUA
ZHU XIAOBAO

Assignees

深圳市盛鸿运科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260318

Claims (10)

1. The roll-to-roll cleaning control method for the electronic structural part of the flexible circuit board is characterized by comprising the following steps of: Based on closed loop tension control and automatic deviation correction, pre-dedusting the part to be cleaned by using a dust-sticking roller, and eliminating static electricity; Based on the cleaning process standard, carrying out multistage chemical cleaning and multistage countercurrent rinsing on the piece to be cleaned, and carrying out high-pressure purging on the piece to be cleaned by using a double-sided symmetrical air knife; Before the to-be-cleaned piece enters the drying cavity, carrying out partition treatment on the to-be-cleaned piece based on the structure of the to-be-cleaned piece, and obtaining a thin area and a thick area corresponding to the to-be-cleaned piece; Placing a dehumidifying and drying module at an air inlet of the drying cavity, and acquiring a hot air drying method based on a cold mirror dew point meter; After the piece to be cleaned is moved out of the drying cavity, static electricity is eliminated from the piece to be cleaned, and servo constant tension winding is performed based on cleaning process standards.
2. The roll-to-roll cleaning control method of the electronic structural member of the flexible circuit board according to claim 1, wherein before the member to be cleaned enters the drying cavity, performing partition treatment on the member to be cleaned based on the structure of the member to be cleaned, and obtaining the thin area and the thick area corresponding to the member to be cleaned comprises: The method comprises the steps that a region, which only comprises a flexible circuit board, in a piece to be cleaned is recorded as a thin plate region, and a region, which is adhered with FR-4, steel sheets, aluminum sheets and multi-layer PI reinforcement, in the piece to be cleaned and is recorded as a thick plate region; All the thin plate areas are sequentially marked as thin areas BQ 1 to BQ t from first to last based on the entering sequence of each thin plate area independent from each other when the piece to be cleaned enters the drying cavity, and all the thick plate areas are sequentially marked as thick areas HQ 1 to HQ r from first to last based on the entering sequence of each thick plate area independent from each other when the piece to be cleaned enters the drying cavity.
3. The roll-to-roll cleaning control method of the electronic structural member of the flexible circuit board according to claim 2, wherein the partitioning treatment is performed on the drying cavity based on the lengths of the thin area and the thick area, and the partitioning temperature control method is constructed and comprises the following steps: For any thin area, acquiring a minimum rectangle capable of wrapping the thin area on the surface of the piece to be cleaned and marking the minimum rectangle as the minimum expansion rectangle of the thin area, acquiring a line segment parallel to the length of the piece to be cleaned in the minimum expansion rectangle and marking the line segment as a longitudinal span line, and marking the length of the longest longitudinal span line as the longitudinal span value of the thin area; and based on the analysis mode of all the thin areas, acquiring the longitudinal span values of all the thick areas, and recording the minimum longitudinal span value in the longitudinal span values of all the thick areas as a length higher than Wen Fenou.
4. The roll-to-roll cleaning control method of the flexible circuit board electronic structural member according to claim 3, wherein the drying cavity is subjected to partition treatment based on the lengths of the thin area and the thick area, and the partition temperature control method is constructed, further comprising: Dividing the drying conveyor belt into 3 areas, and sequentially marking the 3 areas as a pre-drying area, a main drying area and a cooling area from first to second based on the conveying direction of the conveyor belt; based on the process requirement when the electronic structural part of the flexible circuit board is dried, the temperature interval when the flexible circuit board is dried is recorded as a thin temperature interval, the temperature interval when the flexible circuit board which is stuck with FR-4, steel sheets, aluminum sheets and multi-layer PI reinforcement is dried is recorded as a thick temperature interval, and the median values of the thin temperature interval and the thick temperature interval are respectively recorded as a thin median value and a thick median value.
5. The roll-to-roll cleaning control method for the electronic structural members of the flexible circuit board according to claim 4, wherein the partition temperature control method comprises the following steps: The minimum value in the thin temperature interval is recorded as a thin low temperature; when the piece to be cleaned enters the drying cavity and is positioned in a pre-drying area of the drying conveyor belt, the drying temperature in the pre-drying area is adjusted to be [ thin low temperature Bao Zhongzhi ]; When the thin area is completely in the main drying area, a wind field with the longitudinal length of the low-temperature partition length and the transverse length of L is used, and the thin area is dried by taking the middle point of the thin area as the center from top to bottom, wherein the section where the drying temperature is located in the drying process is a thin temperature section, and L is the width of the drying conveyor belt.
6. The roll-to-roll cleaning control method for electronic structural members of flexible circuit board according to claim 5, wherein the zoning temperature control method further comprises: when the thick area is completely positioned in the main drying area, a wind field with the longitudinal length of Wen Fenou and the transverse length of L is used for drying the thick area from top to bottom by taking the midpoint of the thick area as the center, wherein the interval where the drying temperature is positioned in the drying process is a thick temperature interval; When a wind field A1 with a thin temperature interval and a wind field A2 with a thick temperature interval exist in the main drying area at the same time, and the thin area and the thick area corresponding to the wind field A1 and the wind field A2 are adjacent, the connecting line of the midpoint of the thin area and the midpoint of the thick area corresponding to the wind field A1 and the wind field A2 when the drying treatment is carried out is marked as a gradient line, and the midpoint of the gradient line is marked as a gradient midpoint.
7. The roll-to-roll cleaning control method of the flexible circuit board electronic structural member according to claim 6, wherein the partition temperature control method further comprises: When a gradient midpoint is obtained, a wind field with a longitudinal length of low-temperature partition length/2 and a transverse length of L is used for drying treatment by taking the gradient midpoint as a center from top to bottom, wherein a section where a drying temperature is located in the drying treatment is [ thin median value, thick median value ]; The method comprises the steps of marking a boundary between a cooling area and a main drying area as a cooling boundary, marking the room temperature outside a drying cavity as the outside temperature when a piece to be cleaned moves to the cooling area, and drying the area between the cooling boundary and the end point of a drying conveyor belt, wherein the drying temperature in the drying process is set to be a thin median value, the drying temperature at the end point of the drying conveyor belt is set to be the outside temperature, and the drying temperature continuously decreases from the thin median value to the outside temperature in the area between the cooling boundary and the end point of the drying conveyor belt.
8. The roll-to-roll cleaning control method for the electronic structural members of the flexible circuit board according to claim 7, wherein the hot air drying method comprises the steps of: based on the process requirement when the electronic structural part of the flexible circuit board is dried, the maximum allowable existence value of the dew point temperature in the drying cavity is recorded as a dew point threshold value; When the air inlets where the dehumidifying and drying modules are located are a pre-drying area and a cooling area, based on the drying temperatures of the pre-drying area and the cooling area, acquiring dew point temperatures of the pre-drying area and the cooling area in real time when drying treatment is executed by using a cold mirror dew point meter; When the dew point temperature is greater than the dew point threshold value, the dehumidifying and drying module is used for dehumidifying the hot air of the air inlets in the pre-drying area and the cooling area, and when the dew point temperature is less than or equal to the dew point threshold value, the operation power of the dehumidifying and drying module in the pre-drying area and the cooling area is recorded as the standard dehumidifying power.
9. The roll-to-roll cleaning control method for electronic structural members of flexible circuit board according to claim 1, wherein the hot air drying method further comprises: when the air inlet where the dehumidifying and drying group is located is a main drying area, when the piece to be cleaned moves to the main drying area, a cold mirror dew point meter is used for acquiring dew point temperature every T in the main drying area, and when the dew point temperature is larger than a dew point threshold value, a dehumidifying and drying module is used for dehumidifying the main drying area until the dew point temperature is smaller than or equal to the dew point threshold value; When the workpiece to be cleaned moves to the pre-drying area and the cooling area, the dehumidifying and drying module in the pre-drying area and the cooling area is started based on the standard dehumidifying power of the dehumidifying and drying module in the pre-drying area and the cooling area.
10. The roll-to-roll cleaning control system for the flexible circuit board electronic structural part is used for realizing the roll-to-roll cleaning control method for the flexible circuit board electronic structural part according to any one of claims 1-9, and is characterized by comprising a drying pretreatment module, a drying control module and a drying post-rolling module; The drying pretreatment module is used for marking the flexible circuit board electronic structural part which allows the roll-to-roll cleaning as a part to be cleaned, pre-dedusting the part to be cleaned by using a dust-binding roller based on closed-loop tension control and automatic deviation correction, and eliminating static electricity; Based on the cleaning process standard, carrying out multistage chemical cleaning and multistage countercurrent rinsing on the piece to be cleaned, and carrying out high-pressure purging on the piece to be cleaned by using a double-sided symmetrical air knife; The drying control module is used for carrying out partition treatment on the to-be-cleaned piece based on the structure of the to-be-cleaned piece and obtaining a thin area and a thick area corresponding to the to-be-cleaned piece before the to-be-cleaned piece enters the drying cavity; Placing a dehumidifying and drying module at an air inlet of the drying cavity, and acquiring a hot air drying method corresponding to the dehumidifying and drying module and the partition temperature control method based on the partition temperature control method and the chilled mirror dew point meter; And the drying and rolling module is used for eliminating static electricity of the piece to be cleaned after the piece to be cleaned is moved out of the drying cavity, and rolling the piece to be cleaned under servo constant tension based on the cleaning process standard.

Description

Roll-to-roll cleaning control method and system for electronic structural part of flexible circuit board Technical Field The invention relates to the technical field of electronic manufacturing, in particular to a roll-to-roll cleaning control method and a roll-to-roll cleaning control system for electronic structural parts of a flexible circuit board. Background The flexible circuit board electronic structural member is a bendable and foldable electronic functional component which takes a flexible substrate as a carrier, integrates structures such as conductive circuits, components and reinforcement and is used for circuit connection, signal transmission and structural support; the roll-to-roll cleaning of the electronic structural member of the flexible circuit board is a continuous precise cleaning process for ensuring the follow-up laminating, electroplating and mounting quality by removing pollutants such as greasy dirt, dust, residual glue and etching liquid residue on the surfaces of FPC base materials and circuits on line in the continuous coiled material production through modes of spraying, ultrasonic wave, brushing and the like. The existing method for roll-to-roll cleaning control of the flexible circuit board electronic structural member is usually an improvement in the design of cleaning materials, and the cleaning materials are contacted with a net roller to be cleaned, and then the other material is used for removing scraps to the cleaning materials, so that the aim of removing small defects in a long roller of the flexible electronic structural member by using the cleaning materials is fulfilled, although the improvement method can improve the cleaning efficiency of the electronic structural member, in the drying aspect of the cleaning process of the flexible circuit board electronic structural member, the temperature of thick and thin areas is not controlled differently by controlling the temperature and the wind speed of hot air and the drying time, the influence of the environmental humidity in a drying cavity on the drying effect is not considered, the problems of overheating of a thin plate after drying, incomplete evaporation of water in the thick plate and incapability of wiping watermark on the surface of the electronic structural member are caused, and the practicability of the electronic structural member after cleaning is further influenced, for example, in patent application publication No. CN112313018A, novel materials and hardware for automatically cleaning flexible electronic net rollers are disclosed, the scheme is to remove small defects from the long rollers of flexible electronic materials when the long rollers of flexible electronic materials are in continuous motion, and then to use cleaning films for multiple times by improving cleaning materials, while other improvements of roll-to-roll cleaning control methods for electronic structural members of flexible circuit boards are usually improvements in terms of cleaning solution, the problems that in the aspect of drying the electronic structural members of the flexible circuit boards, differential temperature control is not carried out on thick and thin areas, the influence of environmental humidity in a drying cavity on the drying effect is not considered, so that after drying, thin plates overheat, water in the thick plates is not completely evaporated and watermarks which cannot be wiped appear on the surfaces of the electronic structural members are solved, further, the practical applicability of the electronic structural member after cleaning is affected, and in view of this, there is a need for improving the conventional roll-to-roll cleaning control method of the electronic structural member for flexible circuit boards. Disclosure of Invention The invention aims to solve at least one of the technical problems in the prior art to a certain extent, and provides a roll-to-roll cleaning control method and a roll-to-roll cleaning control system for electronic structural members of a flexible circuit board, which are used for solving the problems that in the conventional roll-to-roll cleaning control method for electronic structural members of the flexible circuit board, in the drying aspect in the cleaning process, the temperature of thick and thin areas is not controlled differently, the influence of the environmental humidity in a drying cavity on the drying effect is not considered, the thin plate is overheated after drying, the water in the thick plate is not completely evaporated, and watermarks which cannot be wiped appear on the surfaces of the electronic structural members, and the practicability of the electronic structural members after cleaning is affected. In order to achieve the above object, in a first aspect, the present application provides a roll-to-roll cleaning control method for electronic structural members of a flexible circuit board, comprising the steps of: Based on closed loop tension control a