초록 ▼

A method of shaping an extruded section of polymer directly onto the surface edges of a glazing or glass plate. In one embodiment, a rotatable plate member having a plurality of calibrated die cross sections is placed in front of the exit orifice of an extrusion die. The plate member is rotated to o

A method of shaping an extruded section of polymer directly onto the surface edges of a glazing or glass plate. In one embodiment, a rotatable plate member having a plurality of calibrated die cross sections is placed in front of the exit orifice of an extrusion die. The plate member is rotated to obtain, an extruded section having different profile cross sections and the flow rate of the polymer through the die is controlled in response to the position of the plate member so that the amount of polymer being fed corresponds to the respective profile section being extruded. In another embodiment, an obturating slide member is placed in front of an extrusion die exit orifice sized to correspond to the largest desired profile cross section. To produce abrupt changes in profile cross section, the slide is moved quickly at predetermined locations along the path of the extrusion die. To produce a continuous transition between profile sections, the slide is moved slowly during extrusion. The flow rate of the polymer material to be extruded is regulated in response to the position of the obturating slide member.

대표청구항 ▼

A process for forming an extruded polymer onto a glazing comprising: placing an extrusion die means against an edge of a glazing, wherein said die means includes a calibrated exit orifice and a rotatable plate rotatably positionable in front of said exit orifice, said rotatable plate having formed a

A process for forming an extruded polymer onto a glazing comprising: placing an extrusion die means against an edge of a glazing, wherein said die means includes a calibrated exit orifice and a rotatable plate rotatably positionable in front of said exit orifice, said rotatable plate having formed around its circumference at least two different die cross-sections rotatably positionable in front of said exit orifice to define corresponding profile cross-sections of polymer extruded through said exit orifice. rotatably positioning said plate in a first location to position a first of said die cross sections in front of said exit orifice; guiding said die means along and against a first portion of an edge of the glazing; delivering a flowable polymer at a first flow rate to said die means, to form a first extruded section of said polymer having a first profile cross section corresponding to said first die cross section along said first portion; guiding said die means along and against a second portion of the edge of said glazing; rotatably positioning said plate into a second location to position a second die cross section in front of said exit orifice; and delivering said polymer at a second flow rate to said die means to form a second extruded section of said polymer along said second portion having a second profile cross section corresponding to said second die cross section.