[Chinese Packaging Network News] Embossing and hot stamping are widely used in the finishing processes of various printed materials. In recent years, with the continuous advancement of post-press processing technologies, equipment, and procedures, it has become possible to combine hot stamping and embossing into a single process under certain conditions. This integration significantly reduces costs, lowers energy consumption, and enhances efficiency.
Currently, the industry commonly uses a one-step molding process where both hot stamping and embossing patterns are designed on a single template. The embossing depth is calculated based on the characteristics of the paper to achieve a single molding process. However, this method presents several challenges. It is difficult to produce the plates, especially for large-format products where the hot stamping and embossing elements are spaced apart. This leads to significant material waste and high costs. Moreover, when three or more patterns are placed on a single template, adjusting the pressure in one area can negatively affect other areas.
This article explores how to achieve hot stamping, embossing, and even 3D embossing when the stamping and embossing processes are separated.
Selected test products include holographic positioning hot stamping, 3D embossing, and flat bump effects, which will be used as examples to illustrate the process.
Traditionally, the production sequence would be: printing → hot stamping → embossing → screen printing → die cutting. To integrate these steps, stamping and embossing must be combined. However, in real-world production, simply combining these steps is not straightforward. Temperature, pressure, and speed play critical roles in determining product quality.
During hot stamping, achieving perfect transfer of anodized aluminum requires ideal temperature and pressure. The temperature should be set at a minimum level that allows clear marking via printing lines. Pressure is equally important—too little pressure may lead to poor adhesion, while too much can cause compression deformation of the paper and substrates, resulting in issues like misalignment or adhesion problems.
In general, the pressure should be adjusted so that the anodized aluminum does not discolor and maintains good adhesion. When embossing, the pressure across all sides of the layout must be uniform to ensure a clear embossed effect from the back.
At a constant processing speed, the required temperature for holographic positioning hot stamping is about 150°C. To achieve clear embossed graphics, the embossing pressure must exceed the hot stamping pressure. However, at this temperature, paper deformation can occur, making post-processing difficult and potentially damaging the ink layer or affecting the anti-pull adhesion appearance. Therefore, the key challenge is to provide the necessary temperature for the hot stamping plate without disrupting the irregular processing conditions.
Exploring the Experiment
Method 1: Separating the hot stamping and embossing plates on the platen to increase pressure adjustment flexibility.
At 150°C, this method can achieve a clear embossed graphic effect, but the paper is prone to tearing (as shown in Figure 1). This is because paper becomes brittle at higher temperatures, and forced cooling after pressure application can cause tearing or crushing. Although pressure can be fine-tuned to protect the paper, it’s difficult to reproduce detailed embossing. For mass production, this method leads to inconsistent quality issues, making it suitable only for proofing or testing.
Method 2: Replacing copper plates with heat-insulating resin plates to reduce paper damage under high temperatures.
By replacing the copper embossing plate with a heat-insulating resin plate, the damage caused by high-temperature imprinting is reduced. However, new challenges arise. While the resin provides better thermal insulation, its strength and wear resistance are lower than copper, leading to potential damage to embossing details over time. This results in incomplete embossing, such as missing fine lines or raised dots. Although pressure can be adjusted, the embossed effect is unsatisfactory, especially for 3D embossing. Thus, this method is also limited to proofing.
Method 3: Combining heat-insulating resin and copper into a biconvex plate (Figure 3), offering both hardness and thermal insulation.
Theoretically, at 150°C, the heat-insulating resin in the double-layer plate provides effective thermal protection, reducing the impact of temperature on the embossing process. The copper layer ensures the required strength and hardness for proper printing. Experimental results confirmed that this method achieved the desired embossing effect.
Meats Injectors and Tumblers
For the meat marinating solution we refer to meat tenderizer, Saline mixer, Saline injector(brine injection systems), vacuum massage tumbler.
Saline injector can evenly inject the brine and salt auxiliary materials into the meat blocks, which can shorten the pickling time and greatly enhance the taste and yield of the meat products. The machine can be adjusted with stepping rate, stepping distance, injecting interval and injection pressure according to the technological requirements. Then the brine and salt auxiliary materials can be injected into the meat evenly and continually to reach the optimal effects.
While vacuum tumbler makes meat rolled in the drum under vacuum condition, similar to pulmonary respiration (make product to inflation and shrink alternatively). It makes meat salted evenly, increases the adhesive quality and taste and ensures the freshness of meat.
Injector series:multi needle injector,brine injector,poultry meat injector,fish injector,red meat injector,marinating injectors,pickle injector
Red meat and poultry injection machine with capacity of needles 50
Red meat and poultry injection machine with capacity of needles 74
Red meat and poultry injection machine with capacity of needles 118
Red meat and poultry injection machine with capacity of needles 236
Tumbler series:vacuum tumbler,meat tumbler
Small capacity vacuum tumbler and massager with capacity 200L and 500L
Medium capacity vacuum tumbler and massager with capacity 1000L and 1600L
High capacity vacuum tumbler and massager with capacity 2500L and 3500L
Turnover type vacuum tumbler and massager with capacity 2500L
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