Film laminator for laminating large-size FPC (Flexible Printed Circuit)

Abstract

The utility model provides a film laminator for large-size FPC (Flexible Printed Circuit) lamination, relates to the technical field of flexible printed circuit board manufacturing, effectively solves the problems of unbalanced stress and template deformation of the traditional single oil cylinder drive by adopting a plurality of uniformly distributed oil cylinders, and greatly improves the lamination flatness and yield of large-size FPCs. The lower die plate is provided with a pressure sensor array, the pressure of the acting point of each oil cylinder is monitored in real time, the pressing process is optimized, and safety is ensured; an air knife cooling structure is arranged at the feeding port of the pressing cavity, it is ensured that the FPC is kept at a proper temperature before pressing, and the bonding effect between pressing layers is improved. In addition, the air knife cooling structure is provided with a temperature sensor and electrically connected with the motor, the working state of the motor driving oil pump is adjusted according to the real-time temperature, and proper temperature control in the whole pressing process is ensured. Through the technical improvement, the large-size FPC lamination quality is greatly improved, the service life of a product is prolonged, and meanwhile, the production efficiency and the stability are also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible printed circuit board manufacturing, in particular to a laminator used for laminating large-size FPCs. Background Art

[0002] Flexible printed circuits (FPCs) play a vital role in the modern automotive industry and other high-tech fields. Especially with the trend of automotive electrification and intelligence, large-size FPCs are widely used in various occasions such as vehicle displays, sensor networks, and battery management systems due to their lightweight and bendable features. However, the existing FPC lamination process and equipment face a key technical challenge.

[0003] Most of the FPC laminating machines commonly found on the market currently use a single cylinder as a power source to drive the laminating template to move up and down to complete the lamination operation of the FPC and the cover film. When such equipment is processing small or medium-sized FPCs, the driving force generated by a single cylinder can still meet the uniformity and stability requirements of lamination. However, with the growing demand for large-size FPCs in the automotive industry and other large electronic components, the traditional single-cylinder drive method has exposed obvious limitations.

[0004] When a single oil cylinder pushes a large-area template, the force is concentrated on one point or a local area, and the template is unevenly stressed, especially in the area far away from the cylinder's point of action, where the force is significantly weakened, causing the template to twist or partially sink during the pressing process, which in turn affects the pressure distribution of the large-size FPC on the pressing surface. This problem can cause uneven thickness, warping, and even poor bonding of the pressed FPC, which seriously affects the quality and performance of the final product and reduces the yield rate.

[0005] In addition, due to the insufficient rigidity of the single cylinder drive, the stress transfer during the pressing process of the large-size FPC is not uniform, which not only aggravates the deformation problem of the template, but may also cause damage to the internal structure of the FPC, which is not conducive to the long-term reliable operation of the product. Utility Model Content

[0006] The utility model aims to provide a laminator for laminating large-size FPCs, which uses a plurality of evenly distributed oil cylinders to drive the laminator template, can effectively overcome a series of problems such as unbalanced force, template deformation and the resulting poor quality of FPC laminating caused by the traditional single-cylinder drive, and increase the laminating flatness and yield rate of large-size FPCs.

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0008] A laminator for laminating large-size FPCs comprises a laminating chamber, an upper template and a lower template arranged in the laminating chamber, and a cylinder for driving the lower template, wherein a plurality of the cylinders are provided and the plurality of cylinders are connected in parallel to a hydraulic synchronous motor; and a control system comprising an oil pump, a motor for driving the oil pump, and an oil circuit distribution unit connected to the oil pump, wherein the oil circuit distribution unit is connected to the hydraulic synchronous motor.

[0009] Furthermore, the motor is a servo motor. By using the servo motor as a driving element, the running speed and output torque of the oil pump can be accurately controlled and adjusted in real time according to actual needs, thereby enhancing the response speed and control accuracy of the laminator.

[0010] Furthermore: the number of the oil cylinders is at least 4, which are evenly distributed below the lower template.

[0011] Furthermore, the oil pump is a double pump. The double pump design can supply different pressure levels and flow rates independently or simultaneously, meeting the precise oil pressure distribution and rapid switching required when multiple oil cylinders work synchronously, ensuring the pressure synchronization between each oil cylinder while also improving the flexibility and efficiency of the hydraulic system.

[0012] Furthermore: the control system also includes a pressure sensor array evenly distributed on the lower template, and the pressure sensor array is composed of multiple pressure sensors. The control system includes a pressure sensor array evenly distributed on the lower template, and multiple pressure sensors are used to monitor the actual pressure conditions of each cylinder action point in real time. On the one hand, it is convenient to timely discover the problem cylinders with abnormal oil pressure, timely repair, and prevent a large number of production accidents; on the other hand, it can also optimize the pressing process through data recording and analysis to ensure the safety and controllability of the entire pressing process.

[0013] Furthermore: the pressure sensors are respectively arranged at the action points of each oil cylinder.

[0014] Furthermore: there are two hydraulic synchronous motors, which respectively control the upward driving pipeline and the downward driving pipeline.

[0015] Further: it also includes an air knife cooling structure arranged at the inlet of the lamination chamber, the air knife cooling structure includes two air knives arranged opposite to each other up and down, and the air outlets of the two air knives are respectively oriented to the upper template and the lower template. The air knife cooling structure is arranged at the inlet of the lamination chamber, which can pre-cool the FPC that is about to enter the lamination area, especially for the material part that is easy to solidify prematurely due to high temperature, ensuring that the FPC is in a suitable temperature state before lamination, thereby effectively improving the bonding effect between the lamination layers and reducing the generation of defective products.

[0016] Furthermore, the two wind knives are arranged at an angle, the wind knife located at the top is wind knife 1, and the wind knife located at the bottom is wind knife 2; the air outlet of wind knife 1 faces the lower template, and the air outlet of wind knife 2 faces the upper template. Wind knife 1 and wind knife 2 are arranged at an angle to ensure that the air outlet of the wind knife can directly act near the contact surface of the upper and lower templates to enhance the cooling effect.

[0017] Furthermore: the control system also includes a temperature sensor disposed at the air knife cooling structure, and the temperature sensor is electrically connected to the motor. Since the hydraulic system has a slow transmission, the production cycle is improved. When the temperature sensor detects that the temperature at the inlet of the pressing chamber is lower than or slightly higher than the pressing temperature, the motor is controlled to drive the oil pump to work.

[0018] Compared with the original technology, the utility model has the following beneficial effects:

[0019] 1. The utility model adopts multiple oil cylinders connected to the same hydraulic synchronous motor to drive the lower template, replacing the traditional single oil cylinder drive mode, and effectively solves the problem of uneven force on the template during the large-size FPC pressing process. Because multiple oil cylinders are evenly distributed and apply balanced force to the lower template, the pressing flatness is greatly improved, and the risk of uneven thickness and warping of FPC is reduced, thereby significantly improving the yield rate and product quality of large-size FPC, and extending the service life and reliability of FPC products.

[0020] 2. The utility model is equipped with a servo motor-driven oil pump system and adopts a double pump design, combined with a precise oil circuit distribution unit, which ensures the accuracy and stability of the synchronous operation of multiple cylinders, enhances the uniformity of stress transfer during the pressing of large-size FPCs, and further avoids excessive deformation of the template and damage to the internal structure of the FPC caused by a single oil cylinder drive, thereby improving the yield rate and product quality of large-size FPCs and extending the service life and reliability of FPC products.

[0021] 3. The utility model is provided with an air knife cooling structure, which performs directionally cooling on the upper and lower templates at the inlet of the pressing chamber, effectively preventing the problem of premature solidification of part of the material of the large-size FPC due to high temperature before pressing, thereby significantly improving the pressing effect and yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is the structural diagram of the control system;

[0024] In the figure:

[0025] 1. Pressing chamber; 2. Upper template; 3. Lower template; 4. Oil cylinder; 5.1. Air knife 1; 5.2. Air knife 2; 6. Control system; 6.1. Servo motor; 6.2. Dual pump; 6.3. Hydraulic synchronous motor; 6.31. Upward drive pipeline; 6.32. Downward drive pipeline; 6.4. Oil tank; 6.5. Temperature sensor. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] like Figure 1 and Figure 2 As shown: a laminator for laminating large-size FPC, comprising a laminating chamber 1, an upper mold plate 2, a lower mold plate 3 and a cylinder 4 for driving the lower mold plate 3 arranged in the laminating chamber 1, the number of the cylinders 4 being 8, which are evenly distributed below the lower mold plate 3, and the plurality of cylinders 4 are connected to the same hydraulic synchronous motor 6.3;

[0029] It also includes a control system 6, which includes an oil pump, a motor driving the oil pump, and an oil distribution unit connected to the oil pump. The oil distribution unit includes an oil tank 6.4, an oil pipe connected to the oil tank 6.4, and a control valve installed on the oil pipe. The oil pump is connected to a hydraulic synchronous motor 6.3. There are two hydraulic synchronous motors 6.3, which control the upward drive pipeline 6.31 and the downward drive pipeline 6.32 respectively. The motor is a servo motor 6.1. The servo motor 6.1 is used as a driving element, so that the operating speed and output torque of the oil pump can be accurately controlled and adjusted in real time according to actual needs, thereby enhancing the response speed and control accuracy of the film press. The oil pump is a double pump 6.2. The double pump 6.2 design can independently or simultaneously supply different pressure levels and flow rates, meet the precise oil pressure distribution and rapid switching required when multiple oil cylinders 4 work synchronously, ensure the pressure synchronization between each oil cylinder 4, and also improve the flexibility and efficiency of the hydraulic system. The control system 6 also includes a pressure sensor array evenly distributed on the lower template 3, and the pressure sensors are respectively arranged at the action points of each oil cylinder 4. The pressure sensor array is composed of multiple pressure sensors. The control system 6 includes a pressure sensor array evenly distributed on the lower mold plate 3, and the actual pressure conditions of each oil cylinder 4 action point are monitored in real time through multiple pressure sensors. On the one hand, it is convenient to timely discover the problem oil cylinder with abnormal oil pressure, and timely repair it to prevent a large number of production accidents; on the other hand, it can also optimize the pressing process through data recording and analysis to ensure the safety and controllability of the entire pressing process.

[0030] The device also includes an air knife cooling structure arranged at the inlet of the lamination chamber 1, and the air knife cooling structure includes two air knives arranged opposite to each other up and down, and the air outlets of the two air knives are respectively oriented toward the upper template 2 and the lower template 3. The air knife cooling structure is arranged at the inlet of the lamination chamber 1, which can pre-cool the FPC that is about to enter the lamination area, especially for the material part that is easy to be cured in advance due to high temperature, ensuring that the FPC is in a suitable temperature state before lamination, avoiding the adhesive film of the FPC being dried by high temperature before lamination and affecting the subsequent lamination effect, thereby effectively improving the bonding effect between the lamination layers and reducing the generation of defective products.

[0031] The two wind knives are arranged at an angle, the wind knife located at the top is wind knife 1 5.1, and the wind knife located at the bottom is wind knife 2 5.2; the air outlet of wind knife 1 5.1 faces the lower template 3, and the air outlet of wind knife 2 5.2 faces the upper template 2. Wind knife 1 5.1 and wind knife 2 5.2 are arranged at an angle to ensure that the air outlet of the wind knife can directly act near the contact surface of the upper and lower templates 3 to enhance the cooling effect.

[0032] The control system 6 also includes a temperature sensor 6.5 provided at the air knife cooling structure, and the temperature sensor 6.5 is electrically connected to the motor. Since the hydraulic system has a slow transmission, the production cycle is improved. When the temperature sensor 6.5 detects that the temperature at the inlet of the pressing chamber 1 drops to a temperature slightly higher than the pressing temperature, the motor is controlled to drive the oil pump to perform hot pressing.

[0033] The working principle of the utility model is as follows:

[0034] Initialization operation: Start the laminating machine, the servo motor 6.1 starts to drive the oil pump, the oil pump delivers the hydraulic oil to the hydraulic synchronous motor 6.3 through the oil circuit distribution unit, the hydraulic synchronous motor 6.3 distributes the hydraulic oil to 8 cylinders 4 evenly distributed under the lower template 3 with equal pressure and quantity, and synchronously controls the movement of the 8 cylinders 4 so that they can act according to the preset laminating process requirements.

[0035] Oil pressure regulation and monitoring: The servo motor 6.1 adjusts the speed and output torque of the oil pump in real time, and ensures that all oil cylinders 4 work normally and synchronously, and the oil pressure is evenly distributed without abnormalities according to the pressure information of each oil cylinder 4 action point fed back by the pressure sensor array. The pressure sensor monitors in real time and transmits data to the control system 6 for fault warning and process optimization.

[0036] Air knife cooling pretreatment: When the FPC to be pressed enters the inlet of the pressing chamber 1, the air knife cooling structure starts. The upper and lower air knives pre-cool the FPC near the contact surface of the upper template 2 and the lower template 3 respectively to ensure that the FPC temperature is moderate and effectively cool down the parts of the material that are susceptible to high temperature to optimize the pressing effect.

[0037] Temperature control: The temperature sensor 6.5 monitors the temperature at the inlet of the pressing chamber 1 in real time and transmits the data to the control system 6. When the temperature at the inlet drops slightly above the pressing temperature, the control system 6 starts the motor-driven oil pump in time according to this information to coordinate the operation rhythm of the hydraulic system and the cooling system to ensure that the FPC increases the production rhythm under suitable temperature conditions.

[0038] Continuous lamination process: When the above parameters are stable, the laminator continues to press the large-size FPC. The hydraulic synchronous motor 6.3, servo motor 6.1, oil pump, pressure sensor and air knife cooling structure work together to ensure the safety, controllability and accuracy of the entire lamination process.

[0039] The above implementation is only to illustrate the technical concept and features of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and it cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A laminator for laminating large-size FPC, comprising a laminating chamber, an upper mold plate and a lower mold plate arranged in the laminating chamber, and a cylinder for driving the lower mold plate, characterized in that: There are multiple oil cylinders, and the multiple oil cylinders are connected in parallel to the hydraulic synchronous motor; It also includes a control system, which includes an oil pump, a motor driving the oil pump, and an oil distribution unit connected to the oil pump, and the oil distribution unit is connected to the oil pressure synchronous motor.

2. A laminator for laminating large-size FPC according to claim 1, characterized in that: The motor is a servo motor.

3. A laminator for laminating large-size FPC according to claim 1, characterized in that: The number of the oil cylinders is at least 4 and they are evenly distributed below the lower template.

4. A laminator for laminating large-size FPC according to claim 1, characterized in that: The oil pump is a double pump.

5. The laminator for laminating large-size FPC according to claim 1, characterized in that: The control system further comprises a pressure sensor array uniformly distributed on the lower template, wherein the pressure sensor array is composed of a plurality of pressure sensors.

6. A laminator for laminating large-size FPC according to claim 5, characterized in that: The pressure sensors are respectively arranged at the action points of each oil cylinder.

7. The laminator for laminating large-size FPC according to claim 1, characterized in that: There are two hydraulic synchronous motors, which control the upward drive pipeline and the downward drive pipeline respectively.

8. The laminator for laminating large-size FPC according to claim 1, characterized in that: It also includes an air knife cooling structure arranged at the inlet of the pressing chamber, and the air knife cooling structure includes two air knives arranged opposite to each other up and down, and the air outlets of the two air knives are respectively facing the upper template and the lower template.

9. A laminator for laminating large-size FPC according to claim 8, characterized in that: The two wind knives are arranged obliquely, the wind knife located on the upper side is wind knife one, and the wind knife located on the lower side is wind knife two; the air outlet of wind knife one faces the lower template, and the air outlet of wind knife two faces the upper template.

10. A laminator for laminating large-size FPC according to claim 8, characterized in that: The control system also includes a temperature sensor arranged at the air knife cooling structure, and the temperature sensor is electrically connected to the motor.

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