Method of producing an automobile windshield molding

A method of producing an automobile windshield molding for sealing a space along a periphery of a windshield located in an opening of a vehicle body panel, the method comprising the steps of:

• positioning a plurality of dies in parallel to an extrusion direction of a plastic material wherein first and second dies of said plurality of dies define an opening which corresponds to a cross-sectional shape of the molding;
• extruding an entire molding in a single piece through the opening to integrally form an exterior portion of the molding which substantially covers said space;
• moving the first and second dies with respect to each other so as to extrude a large thickness part of the molding and gradually change a thickness of said exterior portion and to increase a space between an upper wall and a lower wall of the large thickness part of the exterior portion of the molding;
• and
• moving a third die of said plurality of dies into the opening to form a groove which defines a water drain channel between the upper wall and the lower wall of the large thickness part of the exterior portion.

A method of producing an automobile windshield molding for decorating along a periphery of a windshield located in an opening of a vehicle body panel, using an extruding apparatus including a plurality of dies, said automobile windshield molding have an exterior wing extending along said periphery of the windshield of which cross-sectional profile continuously varies in a longitudinal direction from a first molding section to a second molding section and a water drain channel in and along the first molding section, said method comprising the steps of:

• forming an outer surface and an inner surface of the exterior wing and an inner surface of the water drain channel by extruding through dies disposed to correspond with each of said outer and inner surfaces of the exterior wing and the inner surface of the water drain channel;
• gradually changing a position of said dies in a perpendicular direction to an extruding direction from said first molding section to the second molding section;
• and
• moving the die for forming the water drain channel with distance from the other dies so as to reduce a size of the water drain channel from said first molding section to the second molding section.

A method of producing an automobile windshield molding for decorating along a periphery of a windshield located in an opening of a vehicle body panel, using an extruding apparatus including a plurality of dies, said automobile windshield molding having an exterior wing extending along said periphery of the windshield of which cross-sectional profile continuously varies in a longitudinal direction from a first molding section to a second molding section, a connecting portion adopted for insertion into a gap between the periphery of said windshield and an inner edge of said window opening and a water drain channel in and along the first molding section, said method comprising the steps of:

• forming surfaces of the exterior wing, connecting portion and the water drain channel by extruding through the dies disposed to correspond with each of said sections;
• gradually changing a position of said dies in a perpendicular direction to an extruding direction from said first molding section to the second molding section;
• and
• moving the die for forming the water drain channel with distance from the other dies so as to reduce a size of the water drain channel from said first molding section to the second molding section.

A method of producing an automobile windshield molding for decorating along a periphery of a windshield located in an opening of a vehicle body panel, using an extruding apparatus including a plurality of dies, said automobile windshield molding having first and second exterior wings extending along said periphery of the windshield of which cross-sectional profile continuously varies in a longitudinal direction from a first molding section to a second molding section and a water drain channel in and along the first molding section, said method comprising the steps of:

• forming an outer surface of the first and second exterior wings and an inner surface of the water drain channel by extruding through the dies disposed to correspond with each of said surfaces;
• gradually changing a position of said dies in a perpendicular direction to an extruding direction from said first melding section to the second molding section;
• and
• moving the die for forming the water drain channel with distance from the other dies so as to reduce a size of the water drain channel from said first molding section to the second molding section.