A conveying and printing apparatus and method for metal foil tape

Abstract

The application discloses a kind of conveying printing device and method for metal foil belt, belong to novel metal foil belt additive manufacturing technology, utilize tension buffer system to carry out preliminary tension on metal foil belt on unwinding system;Delivery system is set in the lower end of tension buffer system, and the pressing wheel on delivery system can be in the surface of driving wheel with second telescopic support under the action of adhesion;The end of telescopic arm of joule current generating system is provided with contact roller, and the roller is used to introduce current into metal foil belt by joule current generator, and current closed loop is formed with metal substrate, joule heat is generated to preheat metal foil belt, and high-frequency vibration compression roller is used to compress one end of metal foil belt on printing substrate through compression roller, and high-frequency vibration is carried out through compression roller, and metal foil belt is welded on lower substrate or formed part layer by layer.The application can realize the continuous and accurate delivery of metal foil belt in engineering production.

Description

Technical Field

[0001] This invention pertains to additive manufacturing technology for metal foil strips, specifically relating to a conveying and printing device and method for metal foil strips. Background Technology

[0002] Metal additive manufacturing technology integrates computer-aided design, materials processing, and forming techniques. Based on digital model files, it uses software and CNC systems to feed metal materials into a molten pool created by heat sources such as lasers, electric arcs, and electron beams, layer by layer to build up physical objects. Unlike traditional processing methods that involve removing raw materials, cutting, and assembling, it is a bottom-up manufacturing method that creates something from scratch through material accumulation.

[0003] Currently, powder bed fusion and directed energy deposition (DED) have been successfully used to manufacture metal parts. Powder bed fusion, for example, can be used to create complex structures with fine features by controlling the laser spot and layer thickness. The technology is relatively mature, but due to the inherent characteristics of powder beds, it is difficult to directly apply to certain special environments such as microgravity. Directed energy deposition uses a laser-melted metal filament deposition method, which can be used as a near-net-shape component in many cases. However, its forming efficiency is low, and a stable weld pool must be formed between the laser spot and the filament. Therefore, the requirements for parameters such as the distance and height of the filament entering the weld pool are very strict. Ultrasonic additive manufacturing technology utilizes the principle of ultrasonic welding. High-power ultrasonic waves vibrate and rub between metal layers to generate heat, promoting the diffusion of metal atoms at the interface and forming a solid metallurgical bond. Compared to directed energy deposition, which uses a laser energy source, ultrasonic additive manufacturing is a plastic forming process, without a weld pool or thermal deformation. Resistance welding mainly involves bringing two electrodes into close contact with the welding material, artificially applying voltage to the electrodes to form a current, and using resistance heat to melt the material and achieve a connection. Among the raw materials for metal additive manufacturing, metal foil strips are relatively cheaper than wires and powders. Using metal foil strips as raw materials greatly reduces the manufacturing cost of raw materials and helps to improve forming efficiency.

[0004] Currently, there is considerable research on the delivery methods of powder and filament materials in metal additive manufacturing technology. However, in-depth research has not yet been conducted on the delivery methods of metal foil strips and the additive manufacturing process. During the unfolding process of metal foil strips, due to their small thickness and weak rigidity, they are prone to twisting, tangling, and breakage, making stable and accurate delivery difficult and hindering the continuous additive manufacturing process. In addition, cutting metal foil strips after stacking is difficult. How to achieve accurate delivery of metal foil and realize continuous 3D printing is an urgent problem that needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to provide a conveying and printing apparatus and method for metal foil strips, so as to overcome the problems of difficult conveying of metal foil and discontinuous process in existing 3D printing processes.

[0006] A conveying and printing apparatus for metal foil strips includes an unwinding system, a Joule current generating system, a tension buffering system, a delivery system, and a pressure roller system;

[0007] The unwinding system is used to hold the rolled metal foil strip;

[0008] The tension buffer system includes a first telescopic support, and a guide wheel is provided at the front end of the first telescopic support;

[0009] The delivery system includes a first servo motor and a second telescopic support. A drive wheel is provided on the output shaft of the first servo motor, and a pressure wheel is provided at one end of the second telescopic support. The pressure wheel can fit against the surface of the drive wheel under the action of the second telescopic support, and the axis of the pressure wheel is parallel to the axis of the drive wheel.

[0010] The Joule current generating system includes a Joule current generator and a telescopic arm. The end of the telescopic arm is equipped with a contact roller, which is connected to the Joule current generator.

[0011] After passing through the delivery system, the metal foil strip on the unwinding system is pressed onto the printing substrate by the pressure roller system.

[0012] Preferably, the unwinding system includes a second servo motor and an unwinding reel, the unwinding reel being mounted on the output shaft of the second servo motor, and the metal foil strip being wound on the unwinding reel.

[0013] Preferably, the second servo motor, the first telescopic support, and the first servo motor and the second telescopic support are fixedly installed and integrated on the same support frame.

[0014] Preferably, a clamping system is provided between the unwinding system and the tension buffer system.

[0015] Preferably, the clamping system includes a baffle and a third telescopic support, one end of which is provided with a clamping roller, which is located on one side of the baffle.

[0016] Preferably, the first telescopic support of the tension buffer system is connected to a first servo valve, and a position sensor and a tension sensor are installed on the first telescopic support.

[0017] Preferably, a cutting system is provided at the bottom of the delivery system. The cutting system includes a cutting board and a cutting blade driver. A cutting blade is provided at one end of the cutting blade driver, and the cutting blade is spaced apart from the cutting board.

[0018] Preferably, the pressure roller system includes a vibration-assisted pressure roller and a high-frequency vibrator, the high-frequency vibrator being fixed to the bottom of the delivery system, and a high-frequency vibration generator being provided on the high-frequency vibrator.

[0019] Preferably, a positioning guide wheel is provided between the tension buffer system and the clamping system, and the positioning guide wheel is located directly above the clamping system.

[0020] A method for printing and forming metal foil strips includes the following steps:

[0021] S1, the metal foil strip is installed on the unwinding system, the metal foil strip is wound sequentially through the tension buffer system and the re-feeding system to the pressure roller system, the pressure roller system is used to press the metal foil strip onto the substrate, and the contact rollers are brought into contact with the surface of the metal foil strip.

[0022] S2, During the printing process, the conveying speed of the metal foil strip is obtained in real time by the refeeding system, and the Joule current generation system is started. The metal foil strip is printed layer by layer under the combined action of the Joule current generation system and the pressure roller system.

[0023] Specifically, the following steps are included:

[0024] S1, Material unwinding: The metal foil strip is installed on the unwinding system and drawn out from the unwinding reel. The metal foil strip is sequentially wound around the guide wheel, positioning guide wheel, clamping channel, delivery channel of the delivery system, cutting channel of the delivery system and up to the high-frequency vibrating pressure roller. The pressure roller is used to press the metal foil strip onto the substrate.

[0025] S2, Printing preparation: The third telescopic support pushes the clamping roller to press the metal foil strip against one side of the baffle; the second servo valve presses the second telescopic support to push the clamping roller to press the metal foil strip onto the drive wheel at the set pressure; the second servo motor rotates, and the metal foil strip is sent to the high-frequency vibrating pressure roller to contact the substrate by the friction between the drive wheel and the clamping wheel.

[0026] S3, Start Printing: The Joule current generating system is activated to preheat the metal foil strip; the high-frequency vibration generator is activated, and the pressure roller generates mechanical vibration in a specific direction to apply high-frequency vibration to the metal foil strip; the metal foil strip is printed layer by layer under the combined action of Joule heat and high-frequency vibration pressure roller.

[0027] S4, Continuous Printing Process: The delivery system accurately delivers the metal foil strip and controls the conveying speed of the metal foil strip; the 3D print head system, driven by a machine tool, robot, or multi-axis motion mechanism, prints the metal foil strip according to the path planned in the additive manufacturing process; when it is necessary to cut the foil strip or the path changes, the cutting system is activated to cut the metal foil strip.

[0028] S5. Repeat the above process until the task is completed.

[0029] Compared with the prior art, the present invention has the following beneficial technical effects:

[0030] This invention discloses a conveying and printing device for metal foil strips. It utilizes a tension buffer system to initially tension the metal foil strip on the unwinding system. A delivery system is installed at the lower end of the tension buffer system. The delivery system includes a first servo motor and a second telescopic support. A drive wheel is mounted on the output shaft of the first servo motor, and a pressure wheel is mounted at one end of the second telescopic support. The pressure wheel can adhere to the surface of the drive wheel under the action of the second telescopic support. A contact roller is installed at the end of the telescopic arm of the Joule current generating system. The Joule current generator introduces the current value into the metal foil strip through the pressure roller system, forming a current closed loop with the metal substrate. This generates Joule heat to preheat the metal foil strip. This invention solves the problems of difficult metal foil conveying and discontinuous process in 3D printing, thereby achieving continuous 3D printing of metal foil strips.

[0031] This invention utilizes a delivery system to initially feed the metal foil strip, and then acquires the delivery speed of the metal foil strip in real time during the printing process. This speed is used to achieve closed-loop control of the unwinding system. Simultaneously, it can automatically detect faults such as strip breakage, reducing human intervention in the foil strip printing process, improving printing efficiency, reducing defects, minimizing downtime, and ultimately increasing overall efficiency.

[0032] This invention fixes a vibration-assisted pressure roller onto a high-frequency vibrator, using high-frequency vibration to bond preheated metal foil strips layer by layer. It is a low-temperature plastic forming manufacturing technology. This method directly converts electrical energy into mechanical vibration and Joule heat, resulting in high energy efficiency. It avoids the heat dissipation problems caused by high-energy beam forming in a vacuum environment, and also avoids the problem of unstable maintenance of metal liquid bridge transition during high-energy beam deposition of metal wires in a microgravity environment. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the metal foil tape printing system in an embodiment of the present invention.

[0034] Figure 2 This is a schematic diagram of the metal foil tape printhead structure in an embodiment of the present invention.

[0035] Figure 3 This is a schematic diagram of the unwinding reel structure in an embodiment of the present invention.

[0036] Among them, 1-unwinding system, 1-1-second servo motor, 1-2-unwinding reel, 1-2; 2-Joule heating system, 2-1-Joule current generator, 2-2-contact roller, 2-3-telescopic arm; 3-metal foil belt; 4-tension buffer system, 4-1-first servo valve, 4-2-first telescopic support, 4-3-position sensor, 4-4 guide wheel; 5-clamping system, 5-1-baffle, 5-2-clamping roller, 5-3-third telescopic support; 6-delivery system 6-1-First servo motor, 6-2-Drive wheel, 6-3-Pressure wheel, 6-4-Second telescopic support, 6-5-Second servo valve, 6-6-Cutting channel, 7-Cutting system, 7-1-Cutting board, 7-2-Cutting knife driver, 7-3-Cutting scissors, 7-4-Cutting channel; 8-Pressure roller system, 8-1-Pressure roller, 8-2-Vibration generator; 9-Printed part; 10-Printing substrate; 11-Computer control system, 12-Motion platform, 14-Positioning guide wheel. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0039] like Figure 1 , Figure 2 As shown, the present invention provides a conveying and printing device for metal foil strips, comprising an unwinding system 1, a Joule current generating system 2, a tension buffering system 4, a delivery system 6, and a pressure roller system 8.

[0040] The unwinding system 1 is used to unwind the rolled metal foil strip 3 on the unwinding reel as required; the pressure roller system 8 includes a vibration-assisted pressure roller 8-1 and a high-frequency vibrator 8-2, with the vibration-assisted pressure roller 8-1 fixed on the high-frequency vibrator 8-2.

[0041] The unwinding system 1 includes a second servo motor 1-1 and an unwinding reel 1-2. The unwinding reel 1-2 is mounted on the output shaft of the second servo motor 1-1. The metal foil strip 3 is wound onto the unwinding reel 1-2. The second servo motor 1-1 drives the unwinding reel 1-2 to rotate, so that the metal foil strip 3 is unwound and fed according to the set speed.

[0042] The tension buffer system 4 includes a first telescopic support 4-2, and a guide wheel 4-4 is provided at the front end of the first telescopic support 4-2;

[0043] The delivery system 6 includes a first servo motor 6-1 and a second telescopic support 6-4. A drive wheel 6-2 is provided on the output shaft of the first servo motor 6-1, and a pressure wheel 6-3 is provided at one end of the second telescopic support 6-4. The drive wheel 6-2 and the pressure wheel 6-3 are spaced apart to form a delivery channel 6-6. The pressure wheel 6-3 can fit against the surface of the drive wheel 6-2 under the action of the second telescopic support 6-4. The axis of the pressure wheel 6-3 is parallel to the axis of the drive wheel 6-2.

[0044] The Joule current generating system 2 includes a Joule current generator 2-1 and a telescopic arm 2-3. The end of the telescopic arm 2-3 is provided with a contact roller 2-2, which is connected to the Joule current generator 2-1.

[0045] The pressure roller system 8 includes a vibration-assisted pressure roller 8-1. One end of the metal foil strip 3 on the unwinding system 1 is wound around the guide wheel 4-4, passes between the drive wheel 6-2 and the pressing wheel 6-3, and is transported to the printing substrate 10. It is pressed onto the printing substrate 10 by the vibration-assisted pressure roller 8-1.

[0046] The aforementioned conveying and printing device for metal foil strips will be an important module of the 3D printer, connected to the motion platform of the 3D printer. The tension buffer system 4 of the aforementioned conveying and printing device for metal foil strips is located below the unwinding system 1, the delivery system 6 is located below the tension buffer system 4, and the vibration-assisted pressure roller 8-1 is located below the delivery system 6.

[0047] The second servo motor 1-1, the first telescopic support 4-2, the first servo motor 6-1, and the second telescopic support 6-4 are installed in a fixed position relative to each other and can be integrated on the same support frame to form a relatively stable material delivery module of the 3D printing head system.

[0048] Using the telescopic arm 2-3 to adhere to the surface of the metal foil strip 3, the Joule current generator 2-1 will introduce current into the metal foil strip 3 through the contact roller 2-2 according to the set current value, forming a current closed loop with the printing substrate 10, generating Joule heat to preheat the metal foil strip.

[0049] A clamping system 5 is provided between the unwinding system 1 and the tension buffer system 4. The clamping system 5 includes a baffle 5-1 and a third telescopic support 5-3. A clamping roller 5-2 is provided at one end of the third telescopic support 5-3. The clamping roller 5-2 is located on one side of the baffle 5-1, forming a clamping channel between the clamping roller 5-2 and the baffle 5-1. Under the action of the third telescopic support 5-3, the clamping roller 5-2 can move and contact the baffle 5-1. Through the action of the third telescopic support 5-3, the metal foil strip 3 can be clamped onto the baffle 5-1.

[0050] The first telescopic support 4-2 of the tension buffer system 4 is connected to a first servo valve 4-1. A sensor 4-3 is installed at one end of the first telescopic support 4-2. The sensor is divided into a tension sensor and a position sensor. The tension sensor is used to obtain the tension at the front end of the first telescopic support 4-2, which is transmitted through the guide wheel 4-4, indicating the tension of the metal foil strip 3 during printing. The position sensor 4-3 is used to obtain the extension / retraction position of the end of the first telescopic support 4-2. If the tension of the metal foil strip 3 is greater than a set threshold during printing, the first telescopic support 4-2 needs to be shortened to reduce the tension during printing. If the tension of the metal foil strip 3 is less than the set threshold, the first telescopic support 4-2 needs to be extended to increase and maintain the tension during printing. The first telescopic support 4-2, the second telescopic support 6-4, and the third telescopic support 5-3 all employ controllable telescopic mechanisms. These controllable telescopic mechanisms include, but are not limited to, servo motion mechanisms such as cylinders, hydraulic cylinders, and servo motor-driven lead screws. The controllable telescopic mechanisms are used to control the supporting force of the first telescopic support 4-2, the second telescopic support 6-4, or the third telescopic support 5-3.

[0051] The second telescopic support 6-4 of the delivery system 6 is connected to a second servo valve 6-5. The second servo valve 6-5 controls the pressure of the second telescopic support 6-4. The pressure of the pressure wheel 6-3 controls the friction between the metal foil strip 3 and the drive wheel 6-2, thereby driving the metal foil strip 3 to slide downward.

[0052] The delivery system 6 has a cutting system 7 at its bottom. The cutting system 7 includes a cutting plate 7-1 and a cutting blade driver 7-2. A cutting blade 7-3 is attached to one end of the cutting blade driver 7-2. The cutting blade 7-3 is spaced apart from the cutting plate 7-1, forming a cutting channel 7-4 between the cutting blade 7-3 and the cutting plate 7-1. The metal foil strip 3 passes through the cutting channel 7-4, and the cutting blade driver 7-2 pushes the cutting blade 7-3 to the cutting plate 7-1 to complete the automatic cutting of the metal foil strip 3. The cutting blade driver includes, but is not limited to, solenoid valves, cylinders, and other driving mechanisms to achieve the cutting of the metal foil strip.

[0053] The vibration-assisted pressure roller 8-1 is fixed on the high-frequency vibrator 8-2, which is fixed to the bottom of the delivery system 6. The high-frequency vibrator 8-2 is equipped with a high-frequency vibration generator. The high-frequency vibration generated by the high-frequency vibration generator is transmitted to the high-frequency vibrator 8-2. The high-frequency vibrator 8-2 drives the vibration-assisted pressure roller 8-1 to press and weld the metal foil strip 3 onto the substrate in the form of high-frequency vibration.

[0054] A positioning guide wheel 14 is provided between the tension buffer system 4 and the clamping system 5. The positioning guide wheel 14 is located directly above the clamping system 5. The clamping system 5 is used to guide the metal foil strip 3 after passing through the guide wheel 4-4 on the tension buffer system 4 vertically into the clamping system 5 to ensure the stable conveying of the metal foil strip 3.

[0055] Through motion control of the unwinding system 1, tension buffering system 4 and delivery system 6, precise control of the conveying tension of the metal foil strip 3 is achieved in 3D printing processes that require controlled acceleration and deceleration, such as curved surface structures.

[0056] By transmitting the online signal of the rotation of the drive wheel 6-2 of the delivery system to the control system, automatic monitoring and identification of metal foil strip breakage without human intervention is achieved. This metal foil strip 3D printing head system can be installed as an important module on a machine tool, robot, or other multi-axis motion platform capable of CNC motion according to forming instructions, thus becoming a metal additive manufacturing equipment.

[0057] Based on the above-mentioned conveying and printing device for metal foil strips, the accurate conveying and 3D printing of the metal foil strip 3 using it includes the following steps:

[0058] S1, Material unwinding: The metal foil strip 3 is installed on the unwinding system 1 and led out from the unwinding reel 1-2. The metal foil strip 3 is sequentially wound around the guide wheel 4-4, positioning guide wheel 14, clamping channel, delivery channel 6-6 of the delivery system 6, and cutting channel 7-4 through the tension buffer system 4 until it reaches the vibration auxiliary pressure roller 8-1. The vibration auxiliary pressure roller 8-1 is used to press the metal foil strip 3 onto the substrate 10.

[0059] S2, Printing preparation: The third telescopic support 5-3 pushes the clamping roller 5-2 to press the metal foil strip 3 against one side of the baffle 5-1; the second servo valve 6-5 outputs the set pressure P1 to cause the second telescopic support 6-4 to push the clamping roller 6-3 to press the metal foil strip 3 onto the drive wheel 6-2; the first servo motor 6-1 rotates, and the metal foil strip 3 is sent to the pressure roller 8-2 to contact the substrate 10 by the friction between the drive wheel 6-2 and the clamping roller 6-3;

[0060] S3, Start Printing: Start the Joule current generating system 2 to preheat the metal foil strip 3; start the high-frequency vibration generator 8-2, and the pressure roller 8-1 generates mechanical vibration in a specific direction to apply high-frequency vibration to the metal foil strip 3; the metal foil strip 3 is printed layer by layer under the combined action of Joule heat and high-frequency vibration pressure roller 8-1.

[0061] S4, Continuous printing process: The delivery system 6 accurately delivers the metal foil strip 3 and controls the conveying speed of the metal foil strip; the 3D printing head system, driven by a machine tool, robot or multi-axis motion mechanism, prints the metal foil strip according to the path planned in the additive manufacturing process; when it is necessary to cut the foil strip 3 or the path changes, the cutting system 7 is activated and the metal foil strip 3 is cut; the above process is repeated until the task is completed.

[0062] During the printing process described above, when printing on curved surfaces, the 3D print head may encounter sudden acceleration or deceleration requirements, inevitably causing changes in the tension of the metal foil strip 3 during feeding. To ensure a constant tension in the metal foil strip 3, the rotational speed of the second servo motor 1-1 must match the rotational speed of the first servo motor 6-1.

[0063] Initially, the rotational speed w1 of the second servo motor 1-1 is calculated by the computer control system. The second servo valve 6-5 adjusts the pressure P2, and the second telescopic support 6-4 drives the clamping wheel 6-3 to press the metal foil strip 3 onto the drive wheel 6-2. The clamping force generates friction between the metal foil strip and the drive wheel. Under the action of the first servo motor 6-1, the drive wheel 6-2 conveys the metal foil strip to the vibrating auxiliary pressure roller 8-1. When printing begins, the drive wheel 6-2 on the first servo motor 6-1 stops providing driving force. During the printing process, the metal foil strip is pressed onto the substrate by the force of the vibrating auxiliary pressure roller 8-1 and the left-right movement of the printing platform. The metal foil strip is driven by the vibrating auxiliary pressure roller 8-1 and the corresponding print head, and the drive wheel 6-2 on the servo motor 6-1 rotates at a speed ω3.

[0064] The rotational speed ω3 is easily read from the first servo motor 6-1 and is a known quantity. Let the rotation radius of the drive wheel 6-2 be R3, then the wire feeding speed is:

[0065] v3=ω3×R3

[0066] like Figure 3 As shown, the current unwinding radius on the unwinding reel is R4, and the initial unwinding length is L1. Therefore, the rotational speed of the second servo motor 1-1 is:

[0067]

[0068] Here, the current unwinding radius R4 is a constantly changing quantity. Only by solving for R4 can the rotational speed w1 of the second servo motor 1-1 at any time Δt be determined.

[0069] Number of remaining foil roll layers n1:

[0070] In the formula, R5 is the initial unwinding radius on the unwinding reel;

[0071] Remaining length L2: L2 = L1 - Ln

[0072] Remaining length L2:

[0073]

[0074] In the formula, R6 is the mandrel radius of the unwinding reel; D1 is the thickness of a single layer of metal foil strip 3;

[0075] The above equation is a linear equation in two variables. Solving it using the quadratic formula, we get: n1=((D1-2R6)±√((D1-2R6)) 2 +4×D1×L2 / π)) / (2×D1);

[0076] Where n takes a positive value, the current unwinding radius R4 = R5 - n × D1 can be calculated.

[0077] The real-time speed of servo motor 1-1 at the current Δt is:

[0078]

[0079] During the printing system's operation, the metal foil tape 3 may break. In this case, the first servo motor 6-1 will not rotate due to the lack of friction from the metal foil tape 3. When the control system 11 cannot receive the rotation signal w3 from the servo motor 6-1, that is, the speed of the drive wheel 6-2 on the servo motor 6-1 is 0, it is considered that a tape breakage fault has occurred in the system, and the machine needs to be stopped for inspection to eliminate the yarn breakage fault.

[0080] In the initial stage, the delivery system of this patent application acts as a power source to deliver the metal foil strip 3 to the required position. During the printing process, the metal foil strip 3 moves along with the motion platform. At this time, the delivery system can be transformed into a detection system to detect the delivery speed.

[0081] Repeat the above steps to begin automated printing of metal foil strips, forming printed part 9. Control system 11 stops motion platform 12, and printing operation ends.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A conveying and printing device for metal foil strips, characterized in that, It includes an unwinding system (1), a Joule current generating system (2), a tension buffer system (4), a delivery system (6), and a pressure roller system (8). The unwinding system (1) is used to place the rolled metal foil strip (3); The tension buffer system (4) includes a first telescopic support (4-2), and a guide wheel (4-4) is provided at the front end of the first telescopic support (4-2). The delivery system (6) includes a first servo motor (6-1) and a second telescopic support (6-4). A drive wheel (6-2) is provided on the output shaft of the first servo motor (6-1). A pressure wheel (6-3) is provided at one end of the second telescopic support (6-4). The pressure wheel (6-3) can fit against the surface of the drive wheel (6-2) under the action of the second telescopic support (6-4). The axis of the pressure wheel (6-3) is parallel to the axis of the drive wheel (6-2). The Joule current generating system (2) includes a Joule current generator (2-1) and a telescopic arm (2-3). The end of the telescopic arm (2-3) is provided with a contact roller (2-2), which is connected to the Joule current generator (2-1). After passing through the delivery system (6), the metal foil strip (3) on the unwinding system (1) is pressed onto the printing substrate (10) by the pressure roller system (8). The unwinding system (1) includes a second servo motor (1-1) and an unwinding reel (1-2). The unwinding reel (1-2) is mounted on the output shaft of the second servo motor (1-1), and the metal foil strip (3) is wound on the unwinding reel (1-2). The pressure roller system (8) includes a vibration-assisted pressure roller (8-1) and a high-frequency vibrator (8-2). The high-frequency vibrator (8-2) is fixed to the bottom of the delivery system (6), and a high-frequency vibration generator is provided on the high-frequency vibrator (8-2).

2. The conveying and printing device for metal foil strips according to claim 1, characterized in that, The second servo motor (1-1), the first telescopic support (4-2), the first servo motor (6-1), and the second telescopic support (6-4) are fixedly installed and integrated on the same support frame.

3. The conveying and printing device for metal foil strips according to claim 1, characterized in that, A clamping system (5) is provided between the unwinding system (1) and the tension buffer system (4).

4. The conveying and printing device for metal foil strips according to claim 3, characterized in that, The clamping system (5) includes a baffle (5-1) and a third telescopic support (5-3). One end of the third telescopic support (5-3) is provided with a clamping roller (5-2), which is located on one side of the baffle (5-1).

5. The conveying and printing device for metal foil strips according to claim 1, characterized in that, The first telescopic support (4-2) of the tension buffer system (4) is connected to the first servo valve (4-1), and the first telescopic support (4-2) is equipped with a position sensor (4-3) and a tension sensor.

6. The conveying and printing device for metal foil strips according to claim 1, characterized in that, The delivery system (6) is equipped with a cutting system (7) at the bottom. The cutting system (7) includes a cutting board (7-1) and a cutting knife driver (7-2). A cutting scissor (7-3) is provided at one end of the cutting knife driver (7-2). The cutting scissor (7-3) is spaced apart from the cutting board (7-1).

7. The conveying and printing device for metal foil strips according to claim 1, characterized in that, A positioning guide wheel (14) is provided between the tension buffer system (4) and the clamping system (5), and the positioning guide wheel (14) is located directly above the clamping system (5).

8. A method for conveying and printing metal foil strips based on the apparatus of claim 1, characterized in that, Includes the following steps: S1, install the metal foil strip (3) on the unwinding system (1), and wind the metal foil strip through the tension buffer system (4) and the delivery system (6) to the pressure roller system (8) in sequence. Use the pressure roller system (8) to press the metal foil strip (3) onto the substrate (10) and make the contact roller (2-2) contact the surface of the metal foil strip (3); S2, During the printing process, the delivery system (6) is used to obtain the conveying speed of the metal foil strip (3) in real time, and the Joule current generating system (2) is started. The metal foil strip (3) is printed layer by layer under the combined action of the Joule current generating system (2) and the pressure roller system (8).

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