Cadillac Rubber & Plastics, Inc.

Glenn V Dukes

William Troy Browder

Michael K Fauble

Thomas L Stroh

Composite fuel and vapor barrier tube and process for making same

An extrusion die for extruding at least two layers of polymers at substantially different temperatures wherein a first die has portions connected to a second die and portions spaced from the second die. Insulation is provided between the first and second dies and the first die is water cooled. A layer of insulation is provided between the spaced portion of the first and second dies. A third die is mounted to the second die and co-extrudes a third material onto the laminate formed by the first and second dies. The third die is connected to the second die but has portions spaced from the second die. The spaced portion between the second and third dies are insulated. A thermosetting polymer, such as FKM, is extruded by the first die at a temperature of about 180.degree.-200.degree. F. A fluorinated, thermoplastic polymer, such as THV, is extruded from the second die at a temperature of about 480.degree. F. A thermosetting polymer, such as ECO, used to extrude multilayered fuel tubing.

Apparatus and method for extruding multi-layered fuel tubing

A tube separator has two blocks with vertically and linearly aligned protrusions to which joined tubes are attached for separation into individual tubes. The protrusions are interdigitally arranged when the blocks are adjacent each other. A chain drive engages one block and pulls it from the other block which is locked in a fixed position. A guiding means maintains the blocks in an upright position. An ejecting means for separating the tubes from the protrusions engages the driven block and ejects the tubes from the protrusions. The fixed block is pushed by a driven block from a succeeding cycle and also engages the ejecting means for removing the tubes from the protrusions. The chain drive returns a block along the guide means so that an operator may reuse them with other tubes.

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Cadillac, MI, United States of America

Glenn V Dukes