The manufacturing process of WPC doors is quite elaborate. Advanced production equipment, from the mixing system to the extrusion system, is often imported from abroad, leading the international level with a high degree of automation. The dosing of the mixing equipment is accurate, the mixing is uniform, and the efficiency is high, ensuring the stability of the product from the source. Since the production of wood - plastic foamed doors has high requirements for the foaming extrusion equipment, high - torque twin - screw extruders are usually used, and components such as screws and barrels are modified to adapt to the skin - forming and uniform foaming of the inner and outer surfaces of the wood - plastic, and to avoid phenomena such as the carbonization of wood powder. The heat - transfer printing technology also plays a crucial role in the production of WPC doors. Through the heat - transfer printing process, various patterns are transferred onto the extruded boards, enabling the products to have the wood grains and colors of various high - grade tree species, meeting the diverse aesthetic needs of consumers.