Factors for the development of the web hot stamping process

Factors for the development of the web hot stamping process

We will not be unfamiliar with the roll of paper tubes, but when we use it again, have you ever noticed that it contains the hot stamping process, in fact, the hot stamping process has been thoroughly integrated into our daily life, and a little attention will be found that the hot stamping process is actually ubiquitous. The following mainly explains the formulation factors of the web hot stamping process. Process development of the registration cursor: Before formulating the registration cursor process, it is first necessary to have a good understanding of the working principle and requirements of the equipment registration system. There are similarities between the web hot stamping machine register cursor and the web gravure machine register cursor, and the following two aspects should be paid attention to when formulating the web hot stamping machine register cursor. (1) According to the anti-interference regulations of the registration system of the web hot stamping machine, there can be no interference sources within 5.0mm on both sides of the axial registration cursor, and no interference sources within 20mm on both sides of the circumferential registration cursor, such as product patterns, gravure overprint marks, color blocks, etc.
(2) According to the requirements of the web hot stamping machine registration system for the cursor size, the width of the axial position registration cursor line is 2.0mm; The circumferential registration cursor is 3.0mm × 7.0mm in size. In addition to the size requirements of the circumferential position register cursor, the number of cursors is also required, if the conditions permit, the number should be consistent with the hot stamping cycle, so that the machine can not only improve the recognition ability of the hot stamping register cursor, but also shorten the hot stamping registration time, reduce material waste. Process formulation of hot stamping plate:
At present, there are two main types of hot stamping technology used in web hot stamping machine: ordinary hot stamping process and concave-convex hot stamping process. The ordinary hot stamping process is much less difficult to achieve than the concave and convex hot stamping process, and the following is an introduction to how to formulate the hot stamping plate process when the two web hot stamping processes are implemented. (1) The formulation of ordinary hot stamping plate process
First, one of the keys to the realization of all hot stamping processes is to determine the thickness of the hot stamping plate. In the production of ordinary hot stamping plates, after the hot stamping plate is heated, the expansion size of the plate is not very concerned, but it is very important in the production of arc hot stamping plates. Because the hot stamping material used by the web hot stamping machine is a seamless print, and the temperature is very high (about 250 °C) during hot stamping, if the change in the thickness of the hot stamping plate is not fully considered, there will be an error in the hot stamping process between the hot stamping plate and the printed matter, and finally the equipment can not complete the hot stamping process, so the expansion coefficient of the copper alloy must be taken into account in the production process of the web hot stamping plate.
Second, the ordinary hot stamping technology of web paper does not require the size of the hot stamping pressure roller, and only the perimeter of the hot stamping pattern and the model of the hot stamping pressure roller need to be input into the computer during operation, and the computer can calculate the pressure roller drive according to the input information
The speed of the motor to ensure that the surface linear velocity of the hot stamping pressure roller matches the surface linear velocity of the hot stamping plate.
(2) The formulation of the concave and convex hot stamping plate process
The embossing and embossing hot stamping technology is the hot stamping technology that is completed at one time by hot stamping and embossing. Same as the ordinary hot stamping process, the thickness requirements for the arc hot stamping plate are also very strict. In the embossing process, the key analysis is the hot stamping bottom die roller
The thickness matching problem with the concave-convex hot stamping plate roller: after the hot stamping plate roller is heated to the normal hot stamping temperature, the size of the hot stamping plate surface to the center of the cylinder should be exactly the same as the distance from the bottom plate surface to the corresponding roller center
The diameter of the two cylinders is required to be exactly the same, so the thickness of the bottom die should also be strictly controlled, otherwise the linear speed will not match, the upper and lower plates will be misplaced, and the concave and convex hot stamping process will not be realized.
The above are the two factors for the hot stamping process, I hope it will be helpful to you.