Extruder
Its function is to heat, melt, and plasticize PE (polyethylene) plastic granules, and continuously and stably convey them to the next stage via a screw. It provides the core molten material for lamination.
Die
It receives the molten PE from the extruder and expands and evenly distributes it into a curtain of plastic melt with a width matching the final product and a uniform thickness.
Two-Pass Hot Laminating Machine
This is the key station for the first lamination. It consists of heated, large-diameter rollers. The bottom and top aluminum sheets from the unwinding system meet the molten PE extruded from the die here. Under high temperature and pressure, the molten PE initially bonds to the surfaces of the two aluminum sheets, forming the initial shape of a sandwich structure.
Six-Pass Cooling and Shaping Machine
After hot lamination, the sheet material needs to be precisely cooled for shaping. This system, consisting of six cooling rollers, allows both sides of the sheet to alternately and evenly contact the cooling rollers, gradually cooling and solidifying the PE core layer, eliminating internal stress, and ensuring the sheet is flat and does not shift.
Three-Roll Calender
This is a finishing process. Composed of three precision rollers, this unit performs final calendering, leveling, and thickness setting on the pre-shaped sheet material. It imparts a higher surface finish and precise, consistent thickness to the sheet.
Eight-Roll Laminating Machine
This is the final reinforcing and finishing unit. It applies uniform pressure and temperature to the sheet again through multiple sets of rollers (typically including heating and cooling rollers), ensuring maximum bonding strength between the PE core layer and the aluminum layer, and finally correcting the flatness of the sheet before sending it to the traction and cutting/winding system.
Key Features
The equipment achieves a seamless, continuous, and highly efficient end-to-end process, from plastic melt extrusion to hot-pressing lamination with aluminum coils and cooling and shaping.
Multi-stage Molding System: "Hot Lamination-Cooling-Precision Pressing"
Double-pass Hot Lamination Machine: Performs the initial lamination while PE is in its optimal molten state, ensuring initial adhesion.
Six-pass Cooling and Shaping Machine: Employs multiple passes of slow, uniform cooling to effectively prevent board warping and internal stress, ensuring dimensional stability.
Three-roll calender + Eight-roll lamination machine: Performs surface finishing and final strengthening lamination sequentially. This combination ensures extremely high flatness, smoothness, and a final, strong interlayer bond strength.
Core Material Supply Based on Extruder: Using an extruder to directly supply molten PE core material ensures better uniformity and purity of the core material compared to using pre-formed PE sheets, achieving superior melt-bonding results.
Significant Advantages
Extremely High Bonding Strength: Multi-stage lamination and calendering processes (especially the final strengthening with an eight-roll laminator) produce high-quality aluminum composite panels that never delaminate and have excellent peel strength.
High Production Efficiency and Automation: Continuous production allows production line speeds of tens of meters per minute, resulting in massive output while significantly reducing manual intervention and lowering production costs.
Exceptional Panel Flatness: The unique "cooling and shaping + two-stage calendering (three-roll + eight-roll)" process chain is key to ensuring mirror-like flatness of the panels, far exceeding that of simple single-stage lamination equipment.
PE Aluminum Composite Panel Extrusion Equipment:
This equipment primarily produces PE composite panels for interior and exterior walls. Two models are available, with product thicknesses ranging from 1-6mm and widths from 1200-1600mm. Aluminum foil thickness ranges from 0.03-0.5mm. Adhesive bonding processes such as polymer film or coating can be used. The equipment features one-time molding, stable extrusion, strong bonding, and good flatness.
Aluminum composite panels (also known as aluminum-plastic composite boards) are a new type of building material. Introduced to China from abroad in the late 1980s and early 1990s, they have quickly gained popularity due to their economic efficiency, diverse color options, convenient construction methods, excellent processing performance, superior fire resistance, and high quality. The unique properties of aluminum composite panels determine their wide range of applications: they can be used for building exterior walls, curtain wall panels, renovation of old buildings, interior wall and ceiling decoration, advertising signs, display stands, and cleanroom dust control projects. They are considered a new type of building material.
