| 摘要 |
According to the present invention, a door frame comprises: a door frame core material; and a PVC coating layer coated and formed on the door frame. The PVC coating layer may be formed to have a non-uniform thickness, and the door frame core material is formed in a square shape of a wooden material. The thickness of the PVC coating layer may be formed differently by a longitudinal direction and a transverse direction. According to another aspect of the present invention, a manufacturing method of the door frame having a function of preventing twisting comprises: a step of forming a mixture by mixing PVC, a stabilizer, a flame retardant, and a blowing agent under a temperature of 110-130°C for 20-30 minutes; a step of cooling the mixture under a temperature of 20-80°C; a step of injecting the cooled mixture into an extruding machine; a step of blending the injected mixture in a cylinder to a temperature of 150-240°C; a step of forming a PVC coating layer with the blended mixture by injecting the door frame core material into a mold; and a step of cooling the door frame core material having the PVC coating layer. Therefore, the present invention provides the door frame which prevents the frame from being twisted or bent, and has an aesthetic outer appearance. |
