With the rapid development of lightweight, eco-friendly and recyclable new material industries, PP hollow board has become a core alternative material in packaging and logistics, advertising and printing, hardware and electronics, agricultural circulation, building protection and other fields. Featuring light weight, high strength, waterproof, moisture-proof, acid and alkali resistance, anti-aging performance and recyclability, PP hollow boards continue to see growing market demand, making high-performance automatic extrusion lines the mainstream production equipment in the industry.

The PP Hollow Board Extrusion Production Line is a highly integrated and fully automatic one-stop forming system specially designed for continuous manufacturing of polypropylene hollow grid boards. Adopting a modular layout, the complete line consists of eight core systems: raw material pretreatment, melt extrusion and filtration, precision mold forming, vacuum shaping and cooling, multi-stage traction and leveling, servo precision cutting, automatic stacking, and intelligent electric control. It realizes fully continuous automatic production from plastic pellets to finished hollow boards.

During operation, the automatic feeding, drying and mixing system purifies raw materials by removing moisture and impurities to ensure melt purity. The professionally optimized single-screw extruder achieves uniform melting and plasticization of PP materials. Equipped with a hydraulic automatic screen changer and melt metering pump, the equipment maintains stable extrusion pressure and uniform output, effectively avoiding common defects such as thickness deviation and surface blemishes.

The high-precision alloy T-die serves as the key forming component. With an balanced internal flow channel design, it distributes melt evenly and extrudes standard hollow grid board blanks in one pass. The follow-up vacuum calibration platform adopts an independent dual-vacuum negative pressure system and circulating water cooling structure. It quickly shapes the board through uniform vacuum adsorption, accurately fixing board thickness, width and hollow structure. This process greatly improves flatness and eliminates warping, deformation and collapse, ensuring consistent finished board quality.

Equipped with multi-stage traction and constant-temperature annealing leveling devices, the production line effectively eliminates internal stress, improves board toughness and flatness, and prevents deformation and cracking during later use. An optional double-sided corona treatment unit enhances surface adhesion to meet the requirements of printing, lamination and other deep processing procedures. The final servo cutting system supports fixed-length precision cutting with smooth burr-free edges. Cooperated with automatic stacking equipment, it realizes unmanned continuous material collection and significantly improves production efficiency.

The whole line adopts a PLC intelligent control system, which centrally regulates temperature, pressure, speed, tension and other core parameters. It supports synchronous linkage, self-inspection, real-time monitoring and one-click debugging, featuring high automation, simple operation and stable operation. The line is compatible with virgin PP materials, recycled materials and high-filler formulations, supporting flexible production of boards in various thicknesses and widths. With low energy consumption and high yield, it fully meets the requirements of modern green manufacturing and large-scale production.

With outstanding stability, high forming accuracy, wide application range and cost performance, the new-generation PP hollow board extrusion line has become the preferred upgrading equipment for hollow board manufacturers. It is widely applied in civil packaging, industrial turnover, outdoor advertising and building protection industries, promoting high-quality, green and intelligent development of the plastic new material industry.