Method of forming molding on platelike article using extrusion die

A method of producing a platelike article having an adhesive layer and a molding, said adhesive layer being formed on a peripheral edge of said platelike article, said molding covering said adhesive layer and being formed on said peripheral edge, said peripheral edge having a straight portion and a curved corner portion, using an extrusion die comprising a first space for supplying an adhesive to said peripheral edge and a second space for supplying a molding material to said peripheral edge, said method comprising the steps of:

• (a) inserting said peripheral edge into said first and second spaces;
• (b) moving said platelike article relative to said extrusion die, with a moving speed of "Vc" at the curved corner portion, while said peripheral edge is kept inserted in said first and second spaces;
• (c) applying said adhesive form said first space to said peripheral edge so as to form said adhesive layer thereon, said adhesive being a thermoplastic hot melt adhesive;
• and
• (d) extruding said molding material from said second space onto said adhesive layer substantially simultaneously while the step (c) is conducted, with an extrusion rate of "Ms" at the straight portion and with an extrusion rate of "Mc" at the curved corner portion, while the steps (b) and (c) are conducted, said molding material being a thermoplastic resin,
• wherein said first and second spaces are so arranged relative to each other such that said molding and said adhesive layer are substantially simultaneously formed on said peripheral edge and that said adhesive layer is covered with said molding,
• wherein the steps of (b) and (d) are respectively controlled in accordance with a radius of curvature of the curved corner portion and/or with a sectional shape of the molding such that Mc/Vc becomes different from Ms/Vs.