A coating mechanism and flexible copper clad plate production system

Abstract

The present application relates to the technical field of flexible copper-clad plate production equipment for flexible printed circuit board, and provides a flexible copper-clad plate production system, which comprises a coating mechanism and a tension roller set, the tension roller set comprises a supporting roller, the coating mechanism is provided with a glue feeding tank fixed relative to the ground, a glue feeding pipe is further installed on the glue feeding tank, a mounting notch is recessed on one side of the lower end of the glue feeding tank, a coating roller is rotatably installed in the mounting notch, an overflow port is arranged on the glue feeding tank and is in communication with the inside and outside of the glue feeding tank and is located at a higher position in the mounting notch, the glue feeding tank is further fixedly connected with a glue guide hopper, the glue guide hopper has a feeding port connected with the overflow port, the glue guide hopper further has a discharging port located below the feeding port, and a glue guide roller is rotatably installed at the discharging port and partially extends downward outside the glue guide hopper, the glue guide roller is located above the coating roller and is arranged close to the coating roller. The present application solves the problem that the adhesive coating in the prior art may be uneven, which finally leads to poor quality stability of the terminal product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flexible copper clad laminate production equipment, and particularly relates to a coating mechanism and a flexible copper clad laminate production system. BACKGROUND

[0002] Flexible copper clad laminate (FCCL) is also called flexible copper clad laminate or soft copper clad laminate, which is a kind of copper clad laminate formed by bonding copper foil to the single side or double side of flexible insulating material through specific process. It is widely used in the fields of 5G communication equipment, navigation positioning equipment, smart phones and other fields requiring flexible printed circuit board. The flexible copper clad laminate is mainly composed of insulating base film, copper foil and adhesive, wherein the adhesive is used to bond the copper foil and the insulating base film together, and the commonly used adhesive includes epoxy series and acrylate. In the actual production process, the adhesive is coated on the insulating base film by coating, then the copper foil is covered, the copper foil and the insulating base film are bonded together through the adhesive, then the flexible copper clad laminate is dried to remove moisture and solvent, ensure the curing of the adhesive and improve the bonding strength of the board, and then subsequent lamination, hot pressing and post-processing are carried out. In the process of coating the adhesive, an extrusion head is generally used to extrude the adhesive at a certain pressure and then coat it on the insulating base film. In the actual process, uneven coating of the adhesive, such as striping, thickness deviation, etc. (for example, inaccurate control of the pressure and flow rate at the outlet of the extrusion head, or unreasonable gap setting between the coating roller and the coated roller, which will affect the uniformity of the coating), may occur, which will lead to poor quality stability of the flexible copper clad laminate, and may cause inconsistent adhesion between the copper foil and the insulating base film, thereby affecting the electrical and mechanical properties of the flexible printed circuit board, and finally leading to poor quality stability of the terminal product. SUMMARY

[0003] In view of the deficiencies in the prior art, the present application provides a coating mechanism which solves the problem of uneven coating of the adhesive in the prior art, which may eventually lead to poor quality stability of the terminal product.

[0004] According to the embodiment of the present application, a coating mechanism comprises a fixedly arranged glue feeding tank, a glue feeding pipe is further arranged on the glue feeding tank, a mounting gap is arranged on one side of the lower end of the glue feeding tank, a coating roller is rotatably arranged in the mounting gap, an overflow port is arranged on the glue feeding tank and is in communication with the inside and outside of the glue feeding tank and is located at a higher position in the mounting gap, the glue feeding tank is further fixedly connected with a glue guiding hopper and the glue guiding hopper has a feeding port connected with the overflow port, the glue guiding hopper further has a discharging port located below the feeding port and a glue guiding roller is rotatably arranged at the discharging port and partially extends downward outside the glue guiding hopper, the glue guiding roller is located above the coating roller and is arranged close to the coating roller. In this scheme, the adhesive flows to the glue guiding hopper in an overflow manner, then is transferred to the coating roller by the glue guiding roller, and is coated on the insulating base film by the coating roller. In the process, the adhesive first enters the glue guiding hopper, and the amount of adhesive can be stably ensured by controlling the rotating speed of the glue guiding roller in the glue guiding hopper, so that the amount of adhesive in coating can be better controlled, and the coating is stably carried out, thereby solving the problem that the adhesive coating in the prior art may not be uniform and finally leads to poor quality stability of the terminal product.

[0005] Further, the glue guiding hopper is further fixedly connected with a glue overflow tank, the glue overflow tank has an arc-shaped bottom plate located obliquely above the coating roller, the distance between the higher side of the arc-shaped bottom plate to the lower side gradually decreases to the roller surface of the coating roller, and the lower side with smaller distance is arranged outward of the mounting gap, and a plurality of gradient holes are further arranged on the arc-shaped bottom plate, the hole diameter of the gradient hole located at the lower position is smaller than the hole diameter of the gradient hole located at the higher position.

[0006] Further, the coating roller is further fixedly connected with a blocking ring at both ends, and the glue guiding roller and the arc-shaped bottom plate are located between the two blocking rings.

[0007] Further, one side of the glue guiding hopper away from the arc-shaped bottom plate is provided with a lip plate which together with the glue guiding roller forms a space with narrow bottom and wide top, and the lip plate is located obliquely below the overflow port.

[0008] Further, the lower end of the arc-shaped bottom plate is further connected with a flexible pressing plate, and the flexible pressing plate has a free edge extending obliquely downward to the coating roller.

[0009] Further, the glue overflow tank is further fixedly connected with a mounting plate, the mounting plate is screw-connected with an adjusting rod, and one side of the adjusting rod is connected with the free edge of the flexible pressing plate.

[0010] Further, the glue overflow tank is further connected with a balance pipe in communication with the inside and outside of the glue overflow tank.

[0011] Further, a pump body is further connected between the glue overflow tank and the glue feeding tank, a pump-in pipe of the pump body is connected with the glue overflow tank, and a pump-out pipe is connected with the glue feeding pipe.

[0012] Further, two driving motors are further arranged on both sides of the glue feeding tank to drive the coating roller and the glue guiding roller respectively, and the coating roller and the glue guiding roller both rotate clockwise.

[0013] The application also provides a flexible copper-clad plate production system, which comprises the coating mechanism and a plurality of supporting rollers arranged near the coating roller.

[0014] Compared with the prior art, the application has the following advantages:

[0015] The adhesive is supplied to the adhesive guide tank in an overflow manner, and the rotation speed of the adhesive guide roller is kept constant to ensure the stability of the adhesive output, so as to better control the adhesive coating amount and thus ensure stable coating. The problem of uneven adhesive coating and poor quality stability of the end product is solved. The flexible copper-clad plate production system provided by the application can stably coat adhesive and ensure the quality stability of the flexible copper-clad plate, so that the flexible printed circuit board produced from the flexible copper-clad plate has stable electrical and mechanical properties, and the quality stability of the end product (such as 5G communication equipment, navigation positioning equipment, smart phones, etc.) is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the application;

[0017] Figure 2 It is a schematic diagram of the coating roller structure of the embodiment of the application;

[0018] Figure 3 It is a local enlarged schematic diagram of the embodiment of the application;

[0019] Figure 4 It is a local enlarged schematic diagram of the embodiment of the application; Figure 3 It is a local enlarged schematic diagram of the embodiment of the application;

[0020] Figure 5 It is a local enlarged schematic diagram of the embodiment of the application; Figure 4 It is a local enlarged schematic diagram of the embodiment of the application;

[0021] In the above drawings:

[0022] The supporting roller 1, the tensioning roller 2, the insulating base film 3, the adhesive inlet tank 4, the adhesive inlet pipe 5, the adhesive discharge port 6, the coating roller 7, the overflow port 8, the adhesive guide tank 9, the adhesive guide roller 10, the adhesive overflow tank 11, the arc-shaped bottom plate 12, the driving motor 13, the blocking ring 14, the lip plate 15, the material receiving groove 16, the material outlet groove 17, the flexible pressing plate 18, the mounting plate 19, the adjusting rod 20, the balance pipe 21, the pump body 22, the pump inlet pipe 23, the pump outlet pipe 24, the mounting notch 25, and the gradually changing hole 26. DETAILED DESCRIPTION

[0023] The technical solutions in the application will be further described below with reference to the drawings and embodiments.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] In an exemplary embodiment, as shown in Figures 1-5 The present embodiment provides a flexible copper-clad plate production system, which comprises a coating mechanism, further comprises a tension roller set composed of a plurality of tension rollers 2 and a supporting roller 1 located between the tension rollers 2, the coating mechanism is arranged close to the supporting roller 1, the insulating base film 3 is moved through the tension roller set and is coated with adhesive at the supporting roller 1 by the coating mechanism, the coating mechanism arranged includes an adhesive inlet box 4 fixed relative to the ground, an adhesive inlet pipe 5 is also installed on the adhesive inlet box 4, the adhesive inlet pipe 5 is used to introduce adhesive into the adhesive inlet box 4, the bottom of the adhesive inlet box 4 is also provided with an adhesive outlet 6, which is used to completely discharge the adhesive after the work is finished; in more detail, the lower end of the adhesive inlet box 4 is recessed on one side to form a mounting notch 25, a coating roller 7 is rotatably installed in the mounting notch 25, the mounting notch 25 is also semicircular, and the coating roller 7 is arranged to partially extend outside the mounting notch 25 to smoothly approach the supporting roller 1, so as to ensure that the adhesive can be transferred to the insulating base film 3 for coating; in the present scheme, a completely different adhesive supply mode is adopted than in the prior art, specifically: the adhesive inlet box 4 is provided with an overflow port 8 communicating inside and outside and located at a higher position in the mounting notch 25, the adhesive inlet box 4 is further fixedly connected with a glue guide hopper 9, and the glue guide hopper 9 has a feed port connected with the overflow port 8, the glue guide hopper 9 further has a discharge port located below the feed port, and a glue guide roller 10 is rotatably installed at the discharge port and partially extends downward outside, the glue guide roller 10 is located above the coating roller 7 and is arranged close to the coating roller 7, the adhesive gradually increases in the adhesive inlet box 4, then is introduced into the glue guide hopper 9 through the overflow port 8 and the feed port, and is constantly discharged and transferred to the coating roller 7 below by the glue guide roller 10 rotating in the discharge port of the glue guide hopper 9, then the coating amount of the adhesive is stably ensured, thus solving the problem of uneven adhesive coating in the prior art, which finally leads to poor quality stability of the end product.

[0026] As Figures 1-5As shown, in a further aspect, the glue guide hopper 9 is also fixedly connected with a glue overflow tank 11, the glue overflow tank 11 has an arc-shaped bottom plate 12 located obliquely above the coating roller 7, the distance between the higher side to the lower side of the arc-shaped bottom plate 12 gradually decreases to the roller surface of the coating roller 7, and the lower side with smaller distance is arranged outwardly to the mounting gap 25, an arc-shaped channel is enclosed between the arc-shaped bottom plate 12 and the coating roller 7, which is wider at the higher end and narrower at the lower end, so that the adhesive transferred to the coating roller 7 is gradually pressed when passing through the channel to ensure uniform formation of a continuous film structure, and then coated on the adjacent insulating base film 3 in a continuous film structure to further ensure the uniformity of coating; in a more detailed aspect, a drive motor 13 is also mounted on the glue inlet tank 4 to drive the glue guide roller 10 and the coating roller 7 to rotate, and the glue guide roller 10 and the coating roller 7 both rotate clockwise, in particular, the supporting roller 1 and the coating roller 7 are arranged transversely adjacent to each other, so that: in the glue guide hopper 9, the glue guide roller 10 rotates clockwise to pull the adhesive upward on the side away from the supporting roller 1, then turns over the glue guide roller 10 to the other side, and then guides it downward out of the discharge port to the coating roller 7, and finally the adhesive can rotate with the coating roller 7, jump over the coating roller 7, and then be transferred to the insulating base film 3; in particular, in this aspect, the glue inlet tank 4 supplies adhesive to the glue guide hopper 9 in a overflow manner, and then transfers it through the glue guide roller 10, so that the adhesive can be thrown downward at a certain speed to the coating roller 7 below to ensure stable supply of the adhesive.

[0027] As Figures 1-4 shown, further, the coating roller 7 is also fixedly connected with a blocking ring 14 at both ends, the glue guide roller 10, the arc-shaped bottom plate 12, and the supporting roller 1 are all located between the two blocking rings 14, the insulating base film 3 is wound on the supporting roller 1, and the width is also smaller than that of the supporting roller 1, so that the coating roller 7 can fully cover the insulating base film 3, and in a further detailed aspect, the transverse position of the supporting roller 1 can be adjusted to make the insulating base film 3 and the coating roller 7 closer or farther apart, so that coating can be performed or stopped, an adhesive receiving container is arranged below the coating roller 7, which can also assist the scraper and other structures to scrape and collect the adhesive when coating is not performed (i.e. when the supporting roller 1 is far away), to prevent the adhesive from scattering, and in a more detailed aspect, the adhesive not transferred to the insulating base film 3 on both sides of the coating roller 7 can also be collected in a similar manner.

[0028] As Figures 3-5As shown, in detail, the lip plate 15 is arranged in the glue guide hopper 9 away from the arc-shaped bottom plate 12 and cooperates with the glue guide roller 10 to form a space with a narrow lower part and a wide upper part, and the lip plate 15 is arranged obliquely below the overflow port 8, so that an receiving groove 16 obliquely below the feeding port and a discharging groove 17 on the other side of the glue guide roller 10 (i.e. close to the side of the supporting roller 1) are formed at the discharging port, and the lower ends of the receiving groove 16 and the discharging groove 17 are open, so that the rotation of the glue guide roller 10 is not affected, and the lower end of the receiving groove 16 is smaller, so that the adhesive can be turned up with the aid of the rotation of the glue guide roller 10 and cannot leak downward through the lower end, and the larger lower end of the discharging groove 17 smoothly discharges the adhesive.

[0029] As shown in the Figures 3-5 further detailed view, the arc-shaped bottom plate 12 is further provided with a plurality of gradually changing holes 26, the gradually changing holes 26 at a lower position have a smaller diameter than the gradually changing holes 26 at a higher position, so that a plurality of communication holes (i.e. the gradually changing holes 26) are formed on the upper side of the channel, and the adhesive can pass through the holes upward into the glue overflow tank 11 when the adhesive is pressed when passing through the channel to prevent too much adhesive; further, the lower end of the arc-shaped bottom plate 12 is further connected with a flexible pressing plate 18, the flexible pressing plate 18 has a free edge extending obliquely downward toward the coating roller 7, and the spacing between the free edge and the coating roller 7 is smaller, and the adhesive passing through the channel is further flattened by the flexible pressing plate 18, and is finally transferred and coated onto the insulating base film 3, further ensuring uniform coating of the adhesive; in more detail, the flexible pressing plate 18 is detachably connected, specifically, the glue overflow tank 11 is further fixedly connected with a mounting plate 19, the mounting plate 19 is threadedly connected with an adjusting rod 20, and the adjusting rod 20 is connected with one side of the free edge of the flexible pressing plate 18 (which can be threadedly connected or clamped for easy disassembly), and the higher side of the flexible pressing plate 18 can be connected with the arc-shaped bottom plate 12 (i.e. in contact or can be separated), and the flexible pressing plate 18 is mainly limited by the adjusting rod 20 and the mounting plate 19 to be stable, so it is convenient to disassemble and maintain (the flexible pressing plate 18 can be made of elastic rubber material, which may be aged after a period of use, so it needs to be disassembled and replaced).

[0030] As shown in the Figures 3-5 further detailed view, the arc-shaped bottom plate 12 is further provided with a plurality of gradually changing holes 26, the gradually changing holes 26 at a lower position have a smaller diameter than the gradually changing holes 26 at a higher position, so that a plurality of communication holes (i.e. the gradually changing holes 26) are formed on the upper side of the channel, and the adhesive can pass through the holes upward into the glue overflow tank 11 when the adhesive is pressed when passing through the channel to prevent too much adhesive; further, the lower end of the arc-shaped bottom plate 12 is further connected with a flexible pressing plate 18, the flexible pressing plate 18 has a free edge extending obliquely downward toward the coating roller 7, and the spacing between the free edge and the coating roller 7 is smaller, and the adhesive passing through the channel is further flattened by the flexible pressing plate 18, and is finally transferred and coated onto the insulating base film 3, further ensuring uniform coating of the adhesive; in more detail, the flexible pressing plate 18 is detachably connected, specifically, the glue overflow tank 11 is further fixedly connected with a mounting plate 19, the mounting plate 19 is threadedly connected with an adjusting rod 20, and the adjusting rod 20 is connected with one side of the free edge of the flexible pressing plate 18 (which can be threadedly connected or clamped for easy disassembly), and the higher side of the flexible pressing plate 18 can be connected with the arc-shaped bottom plate 12 (i.e. in contact or can be separated), and the flexible pressing plate 18 is mainly limited by the adjusting rod 20 and the mounting plate 19 to be stable, so it is convenient to disassemble and maintain (the flexible pressing plate 18 can be made of elastic rubber material, which may be aged after a period of use, so it needs to be disassembled and replaced).

[0031] Finally, it is to be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the purpose and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A coating mechanism characterized by, The application relates to a coating mechanism, which comprises a fixedly arranged glue feeding box, a glue feeding pipe arranged on the glue feeding box, a mounting gap arranged on one side of the lower end of the glue feeding box, a coating roller rotatably arranged in the mounting gap, an overflow port arranged on the glue feeding box and communicating between the inside and outside of the glue feeding box and located at a higher position in the mounting gap, a glue guide hopper fixedly connected with the glue feeding box and provided with a feeding port connected with the overflow port, a discharging port located below the feeding port and a glue guide roller rotatably arranged on the discharging port and partially extending downwards outside the discharging port, wherein the glue guide roller is located above the coating roller and arranged close to the coating roller; the glue guide hopper is further fixedly connected with a glue overflow box, the glue overflow box is provided with an arc-shaped bottom plate located obliquely above the coating roller, the distance between the higher side of the arc-shaped bottom plate and the roller surface of the coating roller gradually decreases from the higher side to the lower side, and the lower side with a smaller distance is arranged outside the mounting gap, and a plurality of gradient holes are arranged on the arc-shaped bottom plate, wherein the diameter of the gradient hole located at the lower position is smaller than that of the gradient hole located at the higher position.

2. The coating mechanism of claim 1, wherein The two ends of the coating roller are further fixedly connected with a baffle ring, and the glue guide roller and the arc-shaped bottom plate are located between the two baffle rings.

3. The coating mechanism of claim 1, wherein The side of the glue guide hopper, which is away from the arc-shaped bottom plate, is provided with a lip plate which, together with the glue guide roller, encloses a space which is narrow at the lower position and wide at the upper position, and the lip plate is located obliquely below the overflow port.

4. The coating mechanism of claim 1, wherein The lower end of the arc-shaped bottom plate is further connected with a flexible pressing plate, and the flexible pressing plate is provided with a free edge which extends obliquely downwards towards the coating roller.

5. The coating mechanism of claim 4, wherein The glue overflow box is further fixedly connected with a mounting plate, the mounting plate is screw-connected with an adjusting rod, and one side of the free edge of the flexible pressing plate is connected with the adjusting rod.

6. The coating mechanism of claim 1, wherein The glue overflow box is further connected with a balance pipe which communicates between the inside and outside of the glue overflow box.

7. The coating mechanism of claim 1, wherein The glue overflow box and the glue feeding box are further connected with a pump body, the pump-in pipe of the pump body is connected with the glue overflow box, and the pump-out pipe is connected with the glue feeding pipe.

8. The coating mechanism according to any one of claims 1 to 7, wherein The application further comprises two driving motors fixedly arranged on both sides of the glue feeding box and used for driving the coating roller and the glue guide roller respectively, and the coating roller and the glue guide roller both rotate clockwise.

9. A flexible copper clad laminate production system characterized by, The application further comprises a supporting roller arranged close to the coating roller.

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