The working pressure of a hot stamping machine generally falls into two categories: flat hot stamping processes commonly use 4–6 kg/cm², while automated marking rollers operate at 0.2–0.6 MPa. The specific setting should be adjusted according to the equipment type and the material being processed.
1. General Pressure Baseline
The minimum basic pressure should not be lower than 0.2 kg/cm². Below this threshold, the transfer medium may not fully contact the substrate. In actual production, pressure should be calibrated together with temperature and contact time.
2. Core Process Pressure Specifications
For flat hot stamping, the commonly used pressure range is 4–6 kg/cm². When processing uneven or embossed surfaces, the pressure can be adjusted toward the upper limit to maintain pattern clarity. At the same time, the compressive deformation of the substrate should be controlled; for polyester fabrics, for example, it is generally required to be less than 3%.
For automated marking equipment, the linear pressure between the upper and lower rollers and the cable or substrate should be kept at 0.2–0.6 MPa. Excessive pressure may leave permanent indentations on flexible materials such as silicone tubing.
3. Key Points for Dynamic Pressure Adaptation
The pressure uniformity error across the hot press plate or cylinder contact surface should be less than 15%. For relief hot stamping, it is recommended to use a pressure tester for multi-point inspection. Pneumatic equipment also requires attention to moisture accumulation in the air compressor pipeline and to the relationship between cylinder diameter and pressure reading. For example, with a 50 mm cylinder diameter, every 0.1 MPa increase on the pressure gauge adds approximately 1.96 kg/cm² of effective pressure.
For hot press plates or cylinder assemblies that require higher flatness or dedicated mounting structures, Hansheng Automation can provide precision machining according to customer drawings to help improve pressure distribution consistency.
