Application of Hot Stamping Foil Slitting Rewinding Machines

The hot stamping foil slitter rewinder is a post-press cutting equipment specifically developed for slitting and rewinding hot stamping paper to meet the development needs of electrochemical aluminum hot stamping technology. During the electrolytic aluminium hot stamping process, materials such as gold foil, silver foil, electrolytic aluminum foil, holographic hot stamping foil and composite foil are transferred to the surface of substrate materials according to the template pattern under a certain pressure and temperature conditions. This process presents special visual effects in terms of glossiness, three-dimensional sense, metallic sense, and broadly used in high-end packaging product including trademarks, anti-counterfeiting marks, cigarette cases, etc. As the automation level of stamping machines become higher and higher, intelligent electrochemical aluminum stamping foil slitting rewinding machines will gradually replace traditional manual cutting machines.

Overview of hot stamping foil

Hot stamping foil also known as hot stamp aluminum foil, with the thickness ranging from 10μM to 20μM, generally include five different material layers: base film, isolation layer, protective layer, electroplating metal layer and adhesive layer. The basic film layer is generally a biaxially stretched polyester film, which serves as the basic support for other functional layers. The isolation layer is used to separate the hot stamp aluminum foil and polyester film, make sure easy to peel off during the hot stamping process. The protective layer is covered on the hot stamping pattern to protect image and text from being damaged, and also display the color. The metal layer is uniformly sprayed with aluminum layer under vacuum condition to show metallic luster and reflect light. The adhesive layer will melt during hot stamping, play a role in bonding the anodized aluminum foil to printing object. Deciding the appropriate pressure and temperature based on the performance parameters of anodized aluminum in hot stamping process is very important. Normally the ideal temperature is generally between 90 ° C and 140 ° C. If the temperature is too low, it will lead to insufficient melting for peeling layer and glue layer. If the temperature is too high, it will also cause problems such as mackle and aluminum layer oxidation. Low pressure can affect the firmness in hot stamping, and high pressure can also cause deformation of substrate. In addition, the speed of hot stamp also affects the bonding time between hot stamping aluminum foil and printed objects, slower speeds result in stronger hot stamping effect. Generally speaking, the hot stamping process is carried out on the surface with printed pattern. Besides, there are also hot foil stamping on blank substrates, after then print graphic and text on surface of metal foil, this situation is suitable for large-area hot stamping occasions.

Types of hot stamping foil slitter rewinders

1) The manual hot foil stamping slitter rewinder machines fixes an anodized aluminum rolls on central axis, measures the required width and adjusts the knife holder to target position through a rocking handle. Start the power, the central axis drive the hot stamping paper to rotate, then press the handle on knife holder until the cutting process is completed. This type of cutting machine has advantages of low cost, simple operation, suitable for sporadic cutting needs and rolls with small diameter. However, the flatness of end surface and cutting accuracy are relative poor. It’s difficult to meet the production requirements of automation hot stamping machines, gradually being eliminated by the market.

2) The automatic hot stamping foil slitting equipment is proper for the cutting requirements of large roll diameter and mass production. Nanjing LEAP specializes in designing and developing an automatic slitting machine for PE hot stamping film & foil, with max. cutting speed can reach 500 meters. It can slit various widths (minimum width 25mm) of hot stamping paper rolls as need at one time, greatly improve production efficiency. The unwinding adopts a 3 “and 6” shaftless structure, and the unwinding racks on both right and left can move independently horizontally to adjust unwinding width. The unwinding rack can also be equipped with a hydraulic lifting mechanism to meet automatic winding requirement. The control system includes unwinding tension control, meter counting detection, roll diameter calculation and web guiding control system. The automatic closed-loop control system ensures that foil rolls with proper tightness and even end face. According to different material thicknesses, there are two options are optional: razor cutting and shear knife cutting. A scaleplate is configured to make knife setting process more convenient and efficient. The waste edges are blown out through edge blowing system. The winding adopts two sizes of air shafts: 1 “and 3”, and locate the position of paper cores through laser light. The winding tension is changed with roll diameters through taper tension control system, ensure the constant tension of hot stamping paper rolls.

Applications of anodized aluminum stamping foil cutting machines

In addition to electrochemical aluminum foil, anodized aluminum hot stamping foil slitter rewinders are also widely applied in slitting and rewinding hot stamp materials such as gold foil, silver foil, powder foil, composite aluminum foil, holographic hot stamping foil, etc. In order to meet the needs of diversification and exquisite in product packaging, a high-quality automatic gilded paper slitter rewinder can make sure film rolls with good quality, uniform inner tension, and touch screen operation is more intuitive and user-friendly, won’t varies from person to person. In practical applications, China hot stamping film manufacturers have continuously deepened their understanding of material characteristics and cutting processes. They summarize their experience through cutting various types of anodized aluminum foils, optimize the configuration of slitting technical parameters, and maximize the value of the hot stamping foil slitting rewinding machines.