Our Extrusion DIE/MOLDS including:
• Pipe dies: Producing PE water supply pipes, PVC conduit pipes, PPR hot water pipes, etc.
• Profile dies: Producing PVC door and window profiles, aluminum-plastic composite profiles, and irregularly shaped strips (such as decorative moldings);
• Sheet/sheet dies: Producing PP cutting boards, PVC decorative boards, and PET packaging sheets;
• Rod dies: Producing acrylic rods, HDPE solid rods, and nylon guide rods (compatible with the previous acrylic extruder);
• Film dies: Producing PE cling film and PP packaging film (mostly blown film dies);
• Cable sheathing dies: Producing the plastic insulation layer and sheath layer of wires and cables.
A plastic extrusion die (also known as an "extruder head") is the final forming device connected to the extruder barrel. Its core function is to receive the uniformly molten plastic conveyed by the extruder, and through flow channel distribution, pressure regulation, forming constraints, and preliminary cooling, continuously process the melt into semi-finished or finished products with fixed cross-sectional profiles (such as circles, squares, irregular shapes, etc.), providing a foundation for subsequent cooling, shaping, and cutting processes.
Working Principle:
Mellet Introduction: The screw inside the extruder barrel pushes molten plastic (temperature typically 120-300℃, varying depending on the plastic material) at a stable pressure to the die inlet;
Runner Distribution: After entering the die, the melt is evenly distributed into the annular or irregularly shaped runners of the die through structures such as flow dividers and guide plates, eliminating product defects caused by uneven melt flow;
Molding Constraint: The melt gradually conforms to the die cavity wall within the runners, deforming according to the designed cross-sectional shape of the cavity (e.g., circular cavity for pipes, irregularly shaped cavity for profiles);
Pressure Stabilization: A die orifice is installed at the end of the die runners. By adjusting the die orifice gap, the melt extrusion pressure is controlled, ensuring uniform product wall thickness;
Preliminary Shaping: Some dies are equipped with cooling jackets to initially cool the extruded semi-finished product, locking in the cross-sectional shape and preventing deformation during subsequent traction.
The extrusion die structure includes the die head, a flow distribution system (flow divider cone + guide plate), a forming cavity (die + core die), a temperature control system (heating coil/cooling channel), an adjustment mechanism, and a shaping sleeve.
