Processing equipment of paper-based RFID aluminum foil antenna and process thereof

Abstract

The application relates to the technical field of RFID antenna processing, and particularly discloses a paper-based RFID aluminum foil antenna processing device and a process thereof, which comprises an unwinding mechanism, a laser cutting mechanism, a composite mechanism, a die cutting mechanism and a winding mechanism. The laser cutting mechanism comprises: a suction box body, a cutting hole is formed in the suction box body, the cutting hole is in communication with the internal space of the suction box body, and the aluminum foil layer passes through the upper surface of the suction box body and covers the cutting hole; a fan, the fan is connected to the suction box body to form negative pressure at the cutting hole, and is used for sucking away impurities entering the internal space of the box from the cutting hole; and a laser, the laser is arranged above the suction box body and is used for intermittently emitting laser, the position of the laser corresponds to the position of the cutting hole, and the laser cuts the aluminum foil layer at the position of the cutting hole to form a cut seam with a certain length and width. The cut seam of the aluminum foil is formed in advance, and then the composite die cutting is carried out, so that the risk of antenna short circuit is effectively reduced, and the product yield is improved.

Description

Technical Field

[0001] This invention relates to the field of RFID antenna processing technology, specifically to a processing equipment and corresponding processing technology for paper-based RFID aluminum foil antennas. Background Technology

[0002] Existing RFID paper antennas are mainly composed of a paper base layer and an aluminum foil layer. The aluminum foil layer needs to have a tiny slit cut into it as an insulation slit to prevent short circuits after the chip is attached. The mainstream manufacturing processes mainly include the following three types: The first type is the etching process, which uses PET film and paper composite as the substrate, and applies solvent-based adhesive to fully coat aluminum foil. The antenna circuitry is then formed through processes such as printing protective adhesive, acid etching, and cleaning. However, this process has serious drawbacks: First, it has poor environmental compliance. The EU's plastic ban restricts the composite of PET plastic film and paper, making it impossible to classify and recycle composite waste. Furthermore, the entire process uses solvent-based adhesive and etching solution, resulting in high wastewater treatment costs. Second, the precision control of the circuitry is poor. The etching solution easily seeps along the edges of the protective adhesive, and the insulation gap when the antenna is disconnected can only be consistently achieved at 0.1mm~0.13mm, with large dimensional fluctuations and low yield. Third, the equipment occupies a large area (the acid etching tank is approximately 50 meters long), and the production speed is only 5 meters per minute. Fourth, there is significant material waste; the adhesive is fully coated, but the effective antenna circuitry area only accounts for about 20% of the substrate.

[0003] The second type is the all-laser cutting process, which involves applying a thin film of adhesive to aluminum foil and then using a laser to ablate the antenna outline and insulation break seam in one go. This process also has the following drawbacks: the laser vaporization of the aluminum foil produces aluminum dross, which cannot be completely removed by vacuum adsorption, and the residual aluminum shavings in the break seam can easily cause short circuits in the chip; the laser energy cannot simultaneously and accurately process both paper and aluminum foil, resulting in paper leaving marks and aluminum foil being incompletely processed; moreover, the laser's row-by-row ablation results in a production line speed of only 2-3 meters per minute, which is extremely inefficient; in addition, the downward impact force generated by laser vaporization can easily cause the roll to shift, resulting in dimensional scrap.

[0004] The third category is the traditional laser slit opening + die cutting solution, such as the production process of paper-based RFID aluminum foil antenna disclosed in CN118305468A. In this process, the aluminum foil composite paper base is die-cut and then the aluminum foil layer is melted by laser to cut the insulation seam. This melting and cutting step is similar to the full laser cutting process. Since the paper base is on the bottom and the aluminum foil is on the top, the laser power and other processing conditions need to be controlled very precisely during melting and cutting. Otherwise, the paper base will be cut open, resulting in product scrap. At the same time, since the paper base is on the bottom, the debris can only be removed from the top position during melting and cutting, and complete removal cannot be achieved, resulting in unstable product quality.

[0005] In summary, the industry urgently needs a manufacturing solution for RFID paper antennas that can balance environmental protection, high precision, high production capacity, high yield, and low cost. Summary of the Invention

[0006] The purpose of this invention is to provide a processing device for paper-based RFID aluminum foil antennas to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: a processing equipment for paper-based RFID aluminum foil antennas, comprising an unwinding mechanism, a laser cutting mechanism, a laminating mechanism, a die-cutting mechanism, and a winding mechanism. The unwinding mechanism is used to unwind the base layer and the aluminum foil layer. The laminating mechanism is used to laminate the base layer and the aluminum foil layer. The die-cutting mechanism is used to die-cut the laminated aluminum foil layer. The laser cutting mechanism includes: A suction box body with a cutting hole that communicates with the internal space of the suction box body; the aluminum foil layer passes over the upper surface of the suction box body and covers the cutting hole. A fan, which is connected to the suction box to create a negative pressure at the cutting hole and to suck away impurities that enter the internal space of the box from the cutting hole; A laser is positioned above the suction box and emits laser light intermittently. The position of the laser corresponds to the position of the cutting hole. The laser cuts the aluminum foil layer at the position of the cutting hole to form a slit of a certain length and width.

[0008] Furthermore, the suction box includes a bottom shell and a top cover, the internal space is surrounded by the bottom shell and the top cover, and the cutting hole is located on the top cover.

[0009] Furthermore, the cutting holes are distributed in N rows and M columns on the top cover, where N and M are greater than 1, and there are M lasers.

[0010] Furthermore, the width of the slit is between 0.02 and 0.2 mm.

[0011] Furthermore, the composite mechanism is located below the suction box, and the base layer enters the composite mechanism after multiple reversals to be composited with the laser-cut aluminum foil layer.

[0012] Furthermore, the base layer is made of paper.

[0013] Furthermore, the processing technology for the aforementioned paper-based RFID aluminum foil antenna includes the following steps: S1 provides both the aluminum foil layer and the base layer simultaneously; S2, the aluminum foil layer is transported to the laser cutting mechanism in a substrate-free state. The suction box adsorbs the aluminum foil layer above it. The laser emits a laser to cut the aluminum foil layer suspended above the cutting hole to form a slit. At the same time, the debris or fumes generated during cutting are sucked out from below. S3, the cut aluminum foil layer is laminated with the base layer to obtain a composite roll material; S4. Die-cut the composite roll material to form the overall shape of the antenna.

[0014] Furthermore, in step S2, the aluminum foil layer is not stopped being fed during the cutting process.

[0015] The present invention has the following beneficial effects: This invention laser-cuts pure aluminum foil in a suspended state and sets up a negative pressure suction fan below the processing position to completely remove vaporized aluminum chips or debris under the combined action of gravity and negative pressure airflow, thus avoiding chip short circuit problems caused by aluminum chip residue.

[0016] In this invention, aluminum foil slit forming is performed first, followed by composite die cutting. During the melting and cutting process, only the slit forming of the aluminum foil is handled, avoiding various interferences caused by the presence of the substrate. This allows for stable processing of insulating slits with a width of 0.02mm to 0.2mm, effectively reducing the risk of antenna short circuits and improving product yield.

[0017] This invention eliminates the need for PET plastic film, solvent-based adhesive, etching solution, and protective adhesive in the etching process, and uses paper-based material as the substrate, which meets the requirements of green manufacturing. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a simplified structural diagram of the processing equipment for the paper-based RFID aluminum foil antenna in Example 1; Figure 2 for Figure 1 An enlarged schematic diagram of the processing equipment for paper-based RFID aluminum foil antennas; Figure 3 for Figure 2 A schematic diagram of the forward-looking position; Figure 4 for Figure 3 A partially enlarged schematic diagram; Figure 5 for Figure 4 Enlarged schematic diagram of the central suction box; Figure 6 for Figure 5 A diagram illustrating an explosion. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1 like Figures 1-6 As shown, the processing equipment for the paper-based RFID aluminum foil antenna provided in this embodiment mainly includes an unwinding mechanism 10, a composite mechanism 30, a die-cutting mechanism 40, a winding mechanism 50, and a laser cutting mechanism 20. The unwinding mechanism 10 is used to unwind the base layer 60 and the aluminum foil layer 70. The composite mechanism 30 is used to composite the base layer 60 and the aluminum foil layer 70. The base layer 60 is paper. The die-cutting mechanism 40 is used to die-cut the composite aluminum foil layer 70. The unwinding mechanism 10, the composite mechanism 30, the die-cutting mechanism 40, and the winding mechanism 50 are all existing technologies, and their structures will not be further described here.

[0022] The laser cutting mechanism 20 includes a suction box 21, a fan, and a laser 22. The suction box 21 has a cutting hole 201, which is connected to the internal space of the suction box 21. The aluminum foil layer 70 passes through the upper surface of the suction box 21 and covers the cutting hole 201. The fan is connected to the suction box 21 to create a negative pressure at the cutting hole 201 and to suck away impurities that enter the internal space of the box from the cutting hole 201. The laser 22 is located above the suction box 21 and emits laser light intermittently. The position of the laser corresponds to the position of the cutting hole 201. The laser cuts the aluminum foil layer 70 at the position of the cutting hole 201 to form a slit of a certain length and width.

[0023] The suction box 21 includes a bottom shell 211 and a top cover 212. The internal space is surrounded by the bottom shell 211 and the top cover 212. The cutting holes 201 are provided on the top cover 212. The cutting holes 201 are distributed in N rows and M columns on the top cover 212. N and M are greater than 1, and can be two rows or four columns, etc. Correspondingly, there are also M lasers 22, that is, the number is consistent with the number of columns of the cutting holes, and the positions are also corresponding. That is, the laser emission position is aligned with the cutting hole. The cutting hole is long and narrow, which is greater than the length and width of the kerf.

[0024] Meanwhile, part of the composite mechanism 30, specifically the composite roller, is located below the suction box 21. The base layer 60 enters the composite mechanism 30 after multiple reversals and is composited with the laser-cut aluminum foil layer 70. Other existing structures in the composite mechanism 30, such as the adhesive coating structure, will not be described in detail here.

[0025] Of course, the laser cutting mechanism 20 is mounted on the frame 23, which is equipped with multiple guide rollers to transport the aluminum foil layer, the base layer, and the composite roll after the two are combined.

[0026] Example 2 This embodiment is based on the processing equipment of Embodiment 1 and provides a corresponding processing technology, including the following steps: S1, simultaneously provides aluminum foil layer 70 and base layer 60.

[0027] S2, the aluminum foil layer 70 is transported to the laser cutting mechanism 20 in a state without substrate support. The suction box 21 adsorbs the aluminum foil layer 70 above it. The laser 22 emits a laser to cut the aluminum foil layer 70 suspended above the cutting hole 201 to form a slit. At the same time, the debris or smoke generated during cutting is sucked out from below. The aluminum foil layer 70 is transported without stopping during the cutting process.

[0028] S3, the cut aluminum foil layer 70 and the base layer 60 are bonded together with adhesive to obtain a composite roll material.

[0029] S4. The composite roll is die-cut to form the overall shape of the antenna, and then wound up.

[0030] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents. The present invention employs a method of first slitting the aluminum foil and then performing composite die-cutting, which facilitates chip removal at the slit location and avoids quality problems caused by residual aluminum chips.

Claims

1. A processing device for paper-based RFID aluminum foil antennas, comprising an unwinding mechanism, a laser cutting mechanism, a laminating mechanism, a die-cutting mechanism, and a rewinding mechanism, wherein the unwinding mechanism is used to unwind a base layer and an aluminum foil layer, the laminating mechanism is used to laminate the base layer and the aluminum foil layer, and the die-cutting mechanism is used to die-cut the laminated aluminum foil layer, characterized in that... The laser cutting mechanism includes: A suction box body with a cutting hole that communicates with the internal space of the suction box body; the aluminum foil layer passes over the upper surface of the suction box body and covers the cutting hole. A fan, which is connected to the suction box to create a negative pressure at the cutting hole and to suck away impurities that enter the internal space of the box from the cutting hole; A laser is positioned above the suction box and emits laser light intermittently. The position of the laser corresponds to the position of the cutting hole. The laser cuts the aluminum foil layer at the position of the cutting hole to form a slit of a certain length and width.

2. The processing equipment for a paper-based RFID aluminum foil antenna according to claim 1, characterized in that: The suction box includes a bottom shell and a top cover, and the internal space is surrounded by the bottom shell and the top cover. The cutting hole is located on the top cover.

3. The processing equipment for a paper-based RFID aluminum foil antenna according to claim 2, characterized in that: The cutting holes are arranged in N rows and M columns on the top cover, where N and M are greater than 1.

4. The processing equipment for a paper-based RFID aluminum foil antenna according to claim 3, characterized in that: The laser has M units.

5. The processing equipment for a paper-based RFID aluminum foil antenna according to claim 4, characterized in that: The width of the cut is between 0.02 and 0.2 mm.

6. The processing equipment for a paper-based RFID aluminum foil antenna according to claim 4, characterized in that: The composite mechanism is located below the suction box. After multiple reversals, the base layer enters the composite mechanism and is combined with the laser-cut aluminum foil layer.

7. The processing equipment for a paper-based RFID aluminum foil antenna according to claim 4, characterized in that: The base layer is made of paper.

8. A processing technology for a paper-based RFID aluminum foil antenna, using the processing equipment described in any one of claims 1-7, characterized in that, The processing technology Includes the following steps: S1 provides both the aluminum foil layer and the base layer simultaneously; S2, the aluminum foil layer is transported to the laser cutting mechanism in a substrate-free state. The suction box adsorbs the aluminum foil layer above it. The laser emits a laser to cut the aluminum foil layer suspended above the cutting hole to form a slit. At the same time, the debris or fumes generated during cutting are sucked out from below. S3, the cut aluminum foil layer is laminated with the base layer to obtain a composite roll material; S4. Die-cut the composite roll material to form the overall shape of the antenna.

9. The processing technology of a paper-based RFID aluminum foil antenna according to claim 8, characterized in that: In step S2, the aluminum foil layer is continuously fed during the cutting process.

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