초록 ▼

Method of, and apparatus for continuously manufacturing elongate articles with a plurality of segments of basically same and slightly different cross-sections, such as upper and side segments of automobile molding members. The apparatus includes a single die head formed with a common orifice and at

Method of, and apparatus for continuously manufacturing elongate articles with a plurality of segments of basically same and slightly different cross-sections, such as upper and side segments of automobile molding members. The apparatus includes a single die head formed with a common orifice and at least one additional orifice, as well as a device for selecting and controlling operational modes of the apparatus. The device may comprise a guide device which is movable between different positions corresponding to respective operational modes of the apparatus, and which serves to guide synthetic resin material extruded from the additional orifice. The guide member maintains in its one position a spaced relationship of synthetic resin materials extruded from the orifices to form one segment, and causes in another position the synthetic resin materials to adhere with each other to form another segment.

대표청구항 ▼

A method of manufacturing elongate articles including a plurality of segments which are connected with each other in the longitudinal direction of the article, each segment having a common cross-sectional portion which is common to all the segments, at least one segment further having at least one a

A method of manufacturing elongate articles including a plurality of segments which are connected with each other in the longitudinal direction of the article, each segment having a common cross-sectional portion which is common to all the segments, at least one segment further having at least one additional cross-sectional portion, said method comprising the steps of: [A]using a single extrusion die head with a common orifice having a cross-section which corresponds to that of said common cross-sectional portion of a segment, and also with at least one additional orifice having a cross-section which corresponds to that of said additional cross-sectional portion of said at least one segment; [B]alternately and continuously carrying out a first extrusion phase in which a molten synthetic resin material is extruded from said common orifice of said extrusion die head to form a first segment, and a second extrusion phase in which molten synthetic resin materials are extruded from said common orifice and at least one of said additional orifices of said extrusion die head, and are caused to adhere with each other while they are still sufficiently hot to achieve an adhesion, to form a second segment; and [C]detecting the length of said molten synthetic resin material, and either switching said extrusion die head from said first extrusion phase to said second extrusion phase or switching said extrusion die head from said second extrusion phase to said first extrusion phase, said switching step being responsible to said detected length of molten synthetic resin material.