Method for preparing a plate member for a window with a resinous frame

A method of preparing a window panel with a resinous frame wherein the window panel includes a surface, a rear surface thereof and an end surface, comprising:

• relatively moving a window panel and a die for extruding a resinous material so that the die is moved along a surface, or a surface and an end surface of the window panel at a peripheral portion thereof, and extruding the resinous material from the die in a predetermined shape to form a shaped product for a resinous frame on the surface, or the surface and the end surface at the peripheral portion of the window panel in a one-piece construction;
• wherein the relative movement of the die and the panel is carried out by using an operating robot which has been taught a track to follow;
• and wherein the step of extruding the resinous material includes shaping the resinous material using a passage, inclined with respect to a surface of the panel, of the die which is formed to have substantially the same cross-section as that of the shaped product so as to have the entire circumference in cross-section surrounded by an inner wall of the die, and using an extruding orifice of the die for extruding the resinous material which is formed to have a cross-section in substantial conformity with the cross-section of the shaped product by opening the orifice near the surface of the panel, and surrounding three sides of the orifice except for the opened side by the inner wall of the die;
• and contacting the material extruded at the opened side of the extruding orifice with the panel to form the shaped product on the panel in a one-piece construction.