The pre-coating film laminating machine is a special equipment that combines printed materials with pre-coated plastics. Compared with the instant laminating machine, its biggest feature is that there is no sizing and drying parts. Therefore, this type of laminating machine has a compact structure, small size, low cost, easy operation, and good product quality stability.
        The pre-coated film laminating machine consists of four main parts: pre-coated plastic film unwinding, automatic print input, hot-pressing zone compounding, and automatic rewinding, as well as mechanical transmission, pre-coated plastic film flattening, vertical and horizontal slitting, and computer control system And other auxiliary devices.
        1. Print input section. The automatic conveying mechanism can ensure that the printed products do not overlap and enter the composite part at an equal distance during transmission. Generally, pneumatic or friction methods are used to achieve control. The conveying is accurate and high precision. The same requirements can also be met when the printed product with a small composite format.
        2. Compound part. Including composite roller group and calender roller group (Figure 11-7). The composite roller set is composed of a heating pressure roller and a silicone pressure roller; the thermal pressure roller is a hollow roller with a heating device inside, the surface is forged with hard chromium, and is polished and finely ground; the temperature of the thermal pressure roller is tracked and sampled by the sensor and the computer Correct at any time; the adjustment of compound pressure adopts eccentric cam mechanism, and the pressure can be adjusted steplessly. The schematic diagram is as follows: the calender roller group is basically the same as the compound roller group, that is, it is composed of chrome-plated pressure roller and silicone pressure roller, but without heating device. The main function of the calender roller group is: after the pre-coated plastic film is combined with the printed matter by the composite roller group, the surface brightness is not high. After the secondary extrusion of the calender roller group, the surface brightness and adhesion strength are greatly improved.
        3. Transmission system. The transmission system is driven by a computer-controlled high-power stepper motor. After one-stage gear reduction, it is driven by a three-stage chain to drive the movement of the paper feed mechanism and the rotation of the silicone pressure roller of the composite part and the calendering mechanism. The pressure roller group maintains a suitable working pressure under the action of steplessly adjusted pressure.

         4. Computer control system. The computer control system uses a microprocessor, and the hardware configuration is composed of a motherboard, a digital key board, an optical isolation board, a power board, and a stepper motor power driver board.