Polyvinyl chloride (UPVC) resin is used as the main raw material, plus a certain proportion of stabilizers, colorants, fillers, UV absorbers, etc., and is extruded into molded materials.
Door and window frames are made by cutting, welding or screwing, and equipped with sealing strips, tops, hardware, etc.
In order to enhance the rigidity of the profile, steel needs to be added to the cavity of the profile that exceeds a certain length for reinforcement.
The above are the general steps of the manufacturing process of UPVC windows. If you want to know more information, please consult professional books or consult professionals.