DBL is mainly used to overcome the expansibility of foaming and make it solid, and decide panel thickness and production speed. Side belt is overcome horizontal expansion and decide width of panel and guiding to the panels. As active running moulds, it avoids panel deformation and scratch and to ensure panels quality.

In this comprehensive guide, we'll dive deep into the PU sandwich production line and the PU sandwich panel continuous production line, two indispensable systems that drive efficient production and high-quality output.