What Are The Heating Principles Of Vacuum Skin Packaging Machines?

In the packaging process, the quality of Map Tray Sealing Machine and the quality of heating are crucial to the quality of product packaging. This requires us to know more about the use of the equipment's vacuum pump and heating device, and carefully select the auxiliary equipment of various heating devices. Then, before choosing, let's first understand the difference between heating equipment.

When it was introduced in the early days, it was basically made of aluminum alloy with a heating strip for thermal bonding sealing. Later, it was found that the thermal expansion coefficient and thermal contraction coefficient of aluminum alloy were large and easy to deform. In addition, it was made of metal and water must be added before cooling after sealing. Subsequently, a phenolic resin was developed to replace it. In addition, a heating strip made of imported nickel-chromium alloy was installed. Copper block heating devices are installed at both ends, which can stably achieve instantaneous heating, no deformation, and water cooling. Because the resin itself has an insulating function and will not change under the influence of temperature.

In summary, our heating device has mainly undergone two stages of changes: early aluminum alloy materials and late phenolic resin materials. At present, this imported nickel-chromium alloy heating strip enables the equipment to stably complete the heating work, and will be more widely used in the future.