This application relates to the field of
polymer processing equipment technology and discloses an integrated dual-mesh belt melt
filtration system, including a mesh belt box
assembly, inlet and outlet cooling assemblies, a start-up valve
assembly, upper and lower mesh belt
filtration assemblies, an anti-
backflow assembly, and a winding mechanism on the outlet side. The side mesh belt is drawn from the mesh belt box and enters the
filtration assembly, where it undergoes melt
impurity removal supported by the side mesh plate. During filtration, a sealing cylinder drives a
piston block in conjunction with multiple seals to press the mesh belt, while the cooling assembly condenses and solidifies the seeping material, forming a double mechanical and physical leak-proof seal. During screen replacement and
slag discharge, the start-up valve cuts off the
material flow on one side, and the anti-
backflow tongue plate flips under pressure differential to prevent
backflow; the sealing cylinder pulls back the
piston block to generate local negative pressure, assisting the winding motor to smoothly pull out and rewind the old mesh belt. This invention achieves smooth screen replacement without stopping the
machine, effectively reducing screen resistance and the risk of material leakage, and ensuring the continuous and stable operation of the
production line.