Plug feeder screw

Overview

MDF Industry Process Overview: In the MDF industry, several key processes are involved in converting raw wood into finished boards. These include raw material chipping, washing and cleaning, wood chip feeding and refining, followed by forming and pressing. MDF Feeder System – Function and Importance The feeder system is a critical section in the MDF production line, primarily responsible for raw material conditioning. Its main function is to compress incoming wood chips and remove excess moisture before the material enters the cooking and refining stages. Design and Key Components The feeder system consists of several essential components, most notably the compression plug feeder screw operating within a high-pressure conical compression zone, enclosed by a wear-resistant housing. The system depends on maintaining a precise operational clearance between the plug screw flight outer diameter (OD) and the internal bore profile of the housing to ensure effective compression and dewatering. Wear Conditions and Operational Challenges Due to continuous exposure to high pressure, abrasive wood chips, and moisture-induced corrosion, this area experiences severe wear conditions. Any increase in clearance caused by wear on the screw flight OD or the housing bore directly reduces compression efficiency. This can lead to material slippage, decreased dewatering performance, and accelerated material degradation. In severe cases, it may also result in coating failures, such as tungsten carbide delamination or peeling in high-wear zones.