This paper presents a control system for die-cutting machines that uses a single-chip microcontroller to precisely manage the positioning of gold foil through the operation of a servo motor. The system is equipped with features such as parameter setting, real-time display, and user control, making it more efficient and accurate compared to traditional mechanical systems.
Hot stamping is a process in which adhesive is heated and applied to the surface of paper or other materials, allowing metal foil or colored film to be stamped onto it, creating a unique decorative effect. As living standards and material quality continue to rise, the demand for high-quality packaging and decorative elements has increased significantly. To meet these demands, integrating computer control into the die-cutting and hot stamping machine system has become essential, as it enhances both production efficiency and product quality.
In hot stamping operations, there are typically two scenarios, as illustrated in Figure 1. In the first case, the hot stamping area is continuous, as shown on the left side of the figure. In this situation, the gold foil must move in small steps, and the heating die stamps once per step. This process repeats until the entire batch is completed. In the second scenario, the hot stamping areas are discontinuous, as seen on the right side of the figure. If the same method is used, it would result in significant waste of gold foil in the unprinted regions between the stamping areas.
To avoid this waste, the system employs a combination of small and large steps. A small step, referred to as "step size X," is used for the initial stamping, followed by a larger step, known as "step size Y," to skip over the unprinted area. This approach ensures that the gold foil is used efficiently and meets the specific layout requirements of the printed product. The number of steps is determined based on the size of the unprinted area, and users can set these parameters according to their needs.
Traditionally, such operations were controlled using mechanical systems, which were complex, less precise, and costly. To overcome these limitations and improve the reliability, efficiency, and stability of the die-cutting and hot stamping machine, the following control scheme has been implemented:
(1) A servo motor is used to accurately control the start and stop of the gold foil's movement, ensuring precise positioning during each stamping cycle.
(2) The system includes a display function that shows the current walking distance, jumping distance, and the number of steps being executed, providing real-time feedback to the operator.
(3) A keyboard interface allows users to input and adjust key parameters such as walking distance, jump distance, number of steps, switch between running and setting modes, and perform system resets, offering full control over the operation process.
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