RFID antenna manufacturing process and manufacturing device

Abstract

The invention belongs to the technical field of electronic tag manufacturing, and particularly relates to an RFID antenna manufacturing process and device. The method comprises the following steps: sequentially compounding a first self-adhesive film, a second self-adhesive film and a third self-adhesive film as a die cutting layer; a metal foil layer is compounded on the first self-adhesive film of the die cutting layer to serve as an antenna layer; coating a glue layer on the antenna layer according to the antenna contour; die-cutting a first part outside the antenna contour by using a low cutter, and die-cutting a remaining second part outside the antenna contour by using a high cutter; removing the glue layer, the antenna layer and the first self-adhesive film of the first part projection by using the first self-adhesive film; removing the third self-adhesive film and the second self-adhesive film projected by the second part by using the third self-adhesive film; a first self-adhesive film, an antenna layer and a glue layer; compounding a base material layer on the glue layer; and removing the first self-adhesive film adhered to the second self-adhesive film by using the second self-adhesive film. The invention is used for solving the problem that the radio frequency antenna is difficult to manufacture and produce.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic tag manufacturing, and particularly relates to an RFID antenna manufacturing process and manufacturing device. Background Art

[0002] RFID is a wireless communication automatic identification technology, which has been widely used in fields such as logistics and supply chain, retail, manufacturing, transportation, and medical industry.

[0003] Currently, with the development of RFID, the manufacturing processes of RFID antennas mainly include the etching method and the laser process. Among them, in the etching method, the etching solution chemically reacts with the metal part not covered by the anti-etching ink and dissolves it to form the antenna circuit. However, the etching method has the following problems: The process is complex and requires multiple steps such as lamination, printing, and etching. The investment is large and requires a variety of different equipment. The yield is not high. Due to process limitations, numerous steps, large material waste, and many abnormal problems in the etching method. The etching method requires the use of chemical products such as solvent glue, ethyl acetate, ink, acids, and alkalis, so it is poor in terms of environmental protection.

[0004] The laser process is to irradiate the designed pattern or information onto the electronic tag material through a laser beam to achieve pattern engraving, code writing, and antenna manufacturing. The main problems of the laser process are as follows: The investment is large, and the laser equipment is relatively expensive. The production capacity is low because the material needs to be stationary during laser production, so continuous production cannot be achieved. A large amount of aluminum powder will appear during laser production. Aluminum powder is an explosive dust and is not safe. The product stability is poor because errors will occur in the visual positioning and distortion transformation used during laser production. The product has large limitations, and it is difficult to produce small and dense antennas. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an RFID antenna manufacturing process and manufacturing device for solving the problem of difficult production of radio frequency antennas.

[0006] The technical solution of the present invention for solving the above technical problems is as follows: An RFID antenna manufacturing process, which includes the following steps: S1. Laminate the first self-adhesive film, the second self-adhesive film, and the third self-adhesive film in sequence as the die-cutting layer; S2. Laminate a metal foil layer on the first self-adhesive film of the die-cutting layer as the antenna layer; S3. Coat a glue layer on the antenna layer according to the antenna contour; S4. Use a low knife to die-cut the first part outside the antenna contour, and use a high knife to die-cut the remaining second part outside the antenna contour; S5. Use the first self-adhesive film to remove the glue layer, antenna layer, and the first self-adhesive film of the first part of the projection; S6. Use the third self-adhesive film to remove the third self-adhesive film, the second self-adhesive film of the second part of the projection; the first self-adhesive film, the antenna layer, and the glue layer; S7. Compound a substrate layer on the glue layer; S8. Use the second self-adhesive film to remove the first self-adhesive film adhered to it together; Compared with the prior art, the above technical solutions have the following beneficial effects: By compounding the metal foil on the three-layer self-adhesive film and using high and low die-cutting with different depths, the first self-adhesive film and the third self-adhesive film can be peeled off and discharged waste from both sides. When the antenna pattern is relatively complex, the waste can be discharged step by step through the way of discharging waste from both sides. It not only has high precision, but also has high waste discharging and forming efficiency. In addition, after finally compounding the substrate layer, the remaining part is peeled off and discharged waste through the second self-adhesive film to form a finished product, with high production efficiency, no pollution in the production process, and stable product quality.

[0007] On the basis of the above technical solutions, the embodiments of the present application can also be improved as follows: Further, after step S8, it further includes: using a laser to remove the adhesion between the bonding area and the antenna contour.

[0008] Further, control the cutting depth of the high die to be able to completely cut through the second self-adhesive film, and control the cutting depth of the low die to be able to completely cut through the first self-adhesive film.

[0009] Further, the cutting edges of the high die and the low die are coated with an anti-adhesive coating.

[0010] Further, the peel strengths of the glue layer, the third self-adhesive film, the second self-adhesive film, and the first self-adhesive film decrease in sequence.

[0011] Further, the size of the projection of the glue layer on the metal foil layer is not less than 0.05 mm smaller than the size of the antenna contour.

[0012] The present invention also discloses an RFID antenna manufacturing device, which includes a unwind roller, a glue coating device, a UV curing device, a die-cutting device, several waste discharging devices, a substrate unwind device, and a winding roller arranged in sequence; The unwind roller is used to unwind a base layer composed of several laminated self-adhesive films and a metal foil layer; The UV curing device is used to cure the glue layer coated on the metal foil layer; The waste discharging device includes at least two groups of waste discharging roller groups arranged on the upper and lower surfaces of the base layer; The substrate unwind device is used to unwind the substrate layer on the glue layer; The winding roller is used to wind the waste layer formed by the self-adhesive film remaining after the waste discharging device discharges and winds the waste.

[0013] In one embodiment, the die-cutting device is a high-low knife die-cutting device coated with a knife blade.

[0014] In one embodiment, the waste discharging roller group includes a waste discharging guiding roller attached to the surface of the base layer and a waste discharging winding roller for winding the waste layer.

[0015] In one embodiment, the base material unwinding device includes: A composite guiding roller, which is arranged between the waste discharging device and the winding roller and is attached to the glue layer; A base material unwinding roller, which is arranged upstream of the composite guiding roller and is used to unwind the base material layer to the composite guiding roller; A finished product winding roller, which is arranged downstream of the composite guiding roller and is symmetrically arranged with the base material unwinding roller, and is used to wind the base layer after the composite base material layer.

[0016] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. The die-cutting production efficiency is high. The die-cutting speed can reach 15 m / min, and the subsequent laser fine processing can also reach 15 m / min, which improves the RFID production efficiency. Moreover, it has higher stability than the etching process and a more environmentally friendly production environment.

[0017] 2. The production process is pollution-free. There is no need to use solvent glue, and the dust amount during laser fine processing is very small and completely controllable.

[0018] 3. The product quality is stable, the antenna data is consistent, and the finished product rate is relatively high.

[0019] 4. The high-low knife scheme is adopted, so antennas with a line width of 0.5 mm and a line spacing of more than 0.5 mm can be produced on the production line, and products with higher requirements for line spacing can be produced, with high manufacturing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic diagram of the overall structure of the first waste discharging in Embodiment 1 of the present invention.

[0022] Figure 2 For Figure 1Schematic diagram of the structure after the first waste discharge.

[0023] Figure 3 Schematic diagram of the structure for the second waste discharge in Embodiment 1 of the present invention.

[0024] Figure 4 Schematic diagram of the structure after the composite substrate layer in Embodiment 1 of the present invention.

[0025] Figure 5 Schematic diagram of the structure for the third waste discharge in Embodiment 1 of the present invention.

[0026] Figure 6 Schematic diagram of the division of the first part and the second part during waste discharge in Embodiment 1 of the present invention.

[0027] Figure 7 Schematic diagram of the overall structure in Embodiment 2 of the present invention.

[0028] Reference numerals: 100, the first self-adhesive film; 200, the second self-adhesive film; 300, the third self-adhesive film; 400, the antenna layer; 500, the glue layer; 600, the substrate layer; 700, the first part; 800, the second part; 1, unwind roller, 2, guide roller; 3, coating device; 4, UV curing device; 5, die-cutting device; 6, waste discharge roller group; 7, substrate unwind device; 8, winding roller; 9, base layer; 601, waste discharge guiding roller; 602, waste discharge winding roller; 701, composite guiding roller; 702, substrate unwind roller; 703, finished product winding roller. Detailed implementation manners

[0029] The embodiments of the technical solutions of the present invention will be described in detail below with reference to the drawings. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, so they are only examples and cannot be used to limit the protection scope of the present invention. It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present invention belongs.

[0030] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 a limitation of the present invention.

[0031] In addition, terms such as "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present invention, "a plurality of" means more than two unless otherwise specifically defined.

[0032] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Embodiment 1 As Figures 1-5 shown, a manufacturing process of an RFID antenna provided by the present invention includes the following steps: Step S1: Composite a first self-adhesive film, a second self-adhesive film, and a third self-adhesive film in sequence as a die-cutting layer. There is adhesive viscosity between the self-adhesive films, and the adhesive viscosities are different from each other, which is used as a bearing base.

[0034] Step S2: Composite a metal foil layer on the first self-adhesive film of the die-cutting layer as an antenna layer, and aluminum foil can be used for the metal foil.

[0035] Step S3: Coat a glue layer on the antenna layer according to the antenna contour. Specifically, the UV glue is composite on the antenna layer through a rubber roller to form the antenna contour to form a glue layer.

[0036] Step S4: Use high and low knives to die-cut the composite glue layer, antenna layer, and die-cutting layer. Specifically, use the low knife to die-cut the first part outside the antenna contour, and use the high knife to die-cut the remaining second part outside the antenna contour; Herein, the antenna contour is the outer contour of the required antenna pattern, and outside the antenna contour specifically refers to the part outside the shape contour of the antenna pattern. This part is the part to be die-cut and removed that is not needed, and this part may be inside the circle surrounded by the annular antenna pattern; this part outside the antenna contour can be divided into the first part die-cut by the low knife and the second part die-cut by the high knife.

[0037] Step S5: Use the first self-adhesive film to remove the glue layer, antenna layer, and the first self-adhesive film of the projection of the first part. As Figure 1 shown, use the adhesiveness of the first self-adhesive film to remove and discharge waste the range of the projection of the first part after die-cutting the first self-adhesive film and the above parts by the low knife. This step of discharging waste is carried out from the top of the whole base layer, which is the first time of discharging waste.

[0038] Step S6: Use the third self - adhesive film to remove the third self - adhesive film, the second self - adhesive film of the second part of the projection; the first self - adhesive film, the antenna layer and the glue layer. As Figure 3 shown, using the adhesiveness of the third self - adhesive film, after the second part of the projection range after high - knife die - cutting is removed and discharged as waste together with the third self - adhesive film. Here, the waste discharge is carried out from below the base layer, which is the second waste discharge.

[0039] As Figure 6 shown, the first waste discharge of low - knife die - cutting is used to remove the first part, mainly along the general outer contour of the antenna and part of the small bending contours. When discharging the first waste, the contour formed by extending towards the small bending part has an extension direction opposite to the material feeding direction, which is convenient for easier peeling during waste discharge. This part is peeled off and discharged through the first self - adhesive film. From the figure, the first part is the area marked with diagonal lines; The second waste discharge of high - knife die - cutting is used to remove the second part, mainly along the remaining small bending contours of the antenna and the closed hollow structure. This part is peeled off and discharged through the third self - adhesive film. From the figure, the second part is the part marked with grid lines.

[0040] Through the combination of the first part and the second part, the part outside the antenna contour can be basically removed. The division of the first part and the second part is not limited to this Figure 6 shown. It is preferred to use the first part to remove the general contour and part of the corners first, and then use the second part to supplement the removal of the remaining corners and the hollow area. At the same time, the parts that need to be removed together with the first self - adhesive film and the second self - adhesive film are removed. The specific removed parts are as described in Step S5 and Step S6.

[0041] Step S7: Composite a base material layer on the glue layer. As Figure 4 shown, this base material layer can be realized by using PET material, cellulose film or coated paper, etc.

[0042] Step S8: Use the second self - adhesive film to remove the first self - adhesive film adhered to it together. Finally, through the second self - adhesive film, the remaining first self - adhesive film after the first waste discharge is removed together with the second self - adhesive film. As Figure 5 shown, this is the third waste discharge.

[0043] Specifically, the peeling forces of the glue layer, the third self - adhesive film, the second self - adhesive film and the first self - adhesive film decrease in turn to meet the peeling waste discharge order.

[0044] Step S9: Use laser to remove the adhesion between the bonding area and the antenna contour. Here, combined with a laser device, the bonding area is processed in a flying mode to cut off the unnecessary part of the bonding area, and the part that is inconvenient for die - cutting is removed by laser to obtain the final antenna product. By combining large - scale die - cutting and laser, the overall production efficiency is relatively high.

[0045] By laminating a metal foil on a three - layer self - adhesive film and using high - and low - blade die - cutting at different depths, the first self - adhesive film and the third self - adhesive film can be peeled off for waste discharging from both sides. When the antenna pattern is relatively complex, waste discharging can be carried out step by step through waste discharging from both sides. This method not only has high precision but also high waste - discharging and forming efficiency. In addition, after finally laminating the base material layer, the remaining part is peeled off for waste discharging through the second self - adhesive film to form a finished product, with high production efficiency, no pollution in the production process, and stable product quality.

[0046] Among them, controlling the cutting depth of the high - blade can completely cut through the second self - adhesive film, and controlling the cutting depth of the low - blade can completely cut through the first self - adhesive film. In this way, during the first waste discharging, the antenna layer and the glue layer on the first self - adhesive film can be completely peeled off through the first self - adhesive film, and during the third waste discharging, the third self - adhesive film, the second self - adhesive film, the first self - adhesive film, the antenna layer, and the glue layer adhered to the third self - adhesive film can be completely peeled off.

[0047] In this embodiment, to avoid the adhesion of the cutting edge of the cutting tool, the cutting edges of the high - blade and the low - blade are coated with an anti - adhesion coating. Since the high - blade and the low - blade need to perform die - cutting from above the base layer, the anti - adhesion coating can effectively prevent the metal foil layer from adhering to the tip of the cutting tool.

[0048] The size of the projection of the glue layer on the metal foil layer is not less than 0.05 mm smaller than the size of the antenna contour. Because the glue has fluidity, after the glue is coated, the glue is prone to overflow under pressure. Therefore, the size of the coated glue is set to be slightly smaller than the size of the antenna contour.

[0049] Embodiment 2 As Figure 7 shown, this embodiment also discloses a manufacturing device for producing an RFID antenna using the manufacturing process of Embodiment 1. It includes a unwind roller 1, a glue - coating device 3, a UV curing device 4, a die - cutting device 5, several waste - discharging devices, a base - material unwind device 7, and a winding roller 8 arranged in sequence. The material unwound from the unwind roller 1 sequentially passes around the glue - coating device 3, the UV curing device 4, the die - cutting device 5, the waste - discharging device, the base - material unwind device 7 and is connected to the winding roller 8, and is pulled forward by the winding roller 8.

[0050] Among them, the unwind roller 1 is used to unwind a base layer 9 composed of several laminated self - adhesive films and a metal foil layer. In this embodiment, the self - adhesive film is laminated in three layers, namely the first self - adhesive film, the second self - adhesive film, and the third self - adhesive film. The metal foil layer is laminated on the first self - adhesive film to form the base layer 9, which is sent to the subsequent process. The specific peel - force requirement is the same as that in Embodiment 1.

[0051] At least one guide roller 2 is arranged between the unwind roller 1 and the glue - coating device 3 to guide the winding direction of the base layer 9. Then, the glue - coating device 3 coats glue on the metal foil layer according to the antenna contour.

[0052] The UV curing device 4 is used to cure the glue layer coated on the metal foil layer. The waste discharging device includes at least two sets of waste discharging roller groups 6 arranged on the upper and lower surfaces of the base layer 9, and waste is discharged from the upper and lower directions respectively. Specifically, the upper waste discharging roller group 6 discharges the first self-adhesive film to complete the first waste discharge; the lower waste discharging roller group 6 is offset in the downstream direction to discharge the third self-adhesive film to complete the second waste discharge; The base material unwinding device 7 is used to unwind the base material layer on the glue layer, and the base material layer is laminated above the metal foil layer after two waste discharges are completed. The finished product after lamination is wound up while the base material layer is being laminated.

[0053] Specifically, the base material unwinding device 7 includes: a composite guiding roller 701, and base material unwinding rollers 702 and finished product winding rollers 703 symmetrically arranged on both sides of the composite guiding roller 701. The base material unwinding rollers 702, the finished product winding rollers 703 and the composite guiding roller 701 are located on the same surface of the base layer 9.

[0054] The composite guiding roller 701 is arranged between the waste discharging device and the winding roller 8, and is attached to the glue layer. The base material unwinding roller 702 is arranged upstream of the composite guiding roller 701 and is used to unwind the base material layer to the composite guiding roller 701. The base material layer unwound from the base material unwinding roller 702 passes through a guiding roller 2 and then is wound around the composite guiding roller 701. The base material layer is adhered to the glue layer through the composite guiding roller 701. The finished product winding roller 703 is arranged downstream of the composite guiding roller 701 and is symmetrically arranged with the base material unwinding roller 702. It is used to wind the base layer 9 after the base material layer is laminated. The finished product formed after the base material layer is laminated through the composite guiding roller 701 passes through a guiding roller 2 and then is wound around the finished product winding roller 703.

[0055] The last winding roller 8 provides winding power while synchronously completing the third waste discharge. The winding roller 8 is used to wind the waste layer formed by the remaining self-adhesive film after the waste discharging device discharges and winds up the waste.

[0056] In this embodiment, the die-cutting device 5 is a high-low die-cutting device 5 coated with a knife blade.

[0057] Specifically, the waste discharging roller group 6 includes a waste discharging guiding roller 601 attached to the surface of the base layer 9 and a waste discharging winding roller 602 for winding the waste layer. The waste discharging winding roller 602 is used to wind the waste layer, and the waste discharging guiding roller 601 is used to position the waste discharging position, forming a sequential first waste discharge, second waste discharge and third waste discharge. The guiding roller for the third waste discharge is located between the composite guiding roller 701 and the winding roller 8.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A RFID antenna manufacturing process, characterized in that: The following steps are involved: S1, sequentially compounding a first self-adhesive film, a second self-adhesive film and a third self-adhesive film as a die-cutting layer; S2, compounding a metal foil layer on the first self-adhesive film of the die-cut layer as an antenna layer; S3, applying a glue layer on the antenna layer according to the antenna contour; S4, using a low die cutter to cut the first portion outside the antenna outline, and using a high die cutter to cut the remaining second portion outside the antenna outline; S5, using the first self-adhesive film to remove the glue layer, the antenna layer, and the first self-adhesive film of the first portion of the projection; S6, using the third self-adhesive film to remove the third self-adhesive film, the second self-adhesive film, the first self-adhesive film, the antenna layer and the glue layer of the second portion of the projection; S7, compounding a base material layer on the glue layer; S8. Using the second self-adhesive film, remove the first self-adhesive film adhering thereto.

2. The RFID antenna manufacturing process according to claim 1, characterized in that: After step S8, the method further includes: removing the adhesion between the binding area and the antenna outline by using a laser.

3. The RFID antenna manufacturing process according to claim 1, characterized in that: The cutting depth of the high blade can be controlled to completely cut through the second self-adhesive film, and the cutting depth of the low blade can be controlled to completely cut through the first self-adhesive film.

4. The RFID antenna manufacturing process according to claim 3, characterized in that: The blades of the high knife and the low knife are coated with anti-stick coating.

5. The RFID antenna manufacturing process according to claim 1, characterized in that: The peeling forces of the glue layer, the third self-adhesive film, the second self-adhesive film and the first self-adhesive film decrease in sequence.

6. The RFID antenna manufacturing process according to claim 1, characterized in that: The projected size of the glue layer on the metal foil layer is at least 0.05 mm smaller than the size of the antenna outline.

7. An RFID antenna manufacturing device, characterized in that: It includes an unwinding roller, a gluing device, a UV curing device, a die-cutting device, several waste discharge devices, a substrate unwinding device and a winding roller which are arranged in sequence; The unwinding roller is used to unwind a base layer composed of a plurality of stacked self-adhesive films and metal foil layers; The UV curing device is used to cure the glue layer coated on the metal foil layer; The waste discharge device comprises at least two waste discharge roller groups arranged on the upper and lower surfaces of the base layer; The substrate unwinding device is used for unwinding a substrate layer on the glue layer; The winding roller is used for winding up the waste layer formed by the self-adhesive film remaining after the waste discharge device discharges and rewinds the waste.

8. The RFID antenna manufacturing device according to claim 7, characterized in that: The die-cutting device is a high-low knife die-cutting device covered with a knife skin.

9. The RFID antenna manufacturing device according to claim 7, characterized in that: The waste discharge roller group comprises a waste discharge guide roller attached to the surface of the base layer and a waste discharge winding roller for winding up the waste layer.

10. The RFID antenna manufacturing device according to claim 7, characterized in that: The substrate unwinding device comprises: A composite guide roller, disposed between the waste discharge device and the winding roller, and attached to the glue layer; A substrate unwinding roller, disposed upstream of the composite guide roller, for unwinding the substrate layer to the composite guide roller; The finished product winding roller is arranged downstream of the composite guide roller and is symmetrically arranged with the substrate unwinding roller, and is used for winding the base layer after the composite substrate layer.

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