| 摘要 |
<p>A method and apparatus for forming an extruded plastic lumbar product from a comingled plastic waste feedstock. The apparatus includes an extruder portion and a forming portion. The extruder portion includes a compound extruder which compresses and melts the waste product by a sudden transition within a constant pitch conveyor. From the compound extruder, the melt is introduced into a hot melt extruder which is formed so as to prevent vortex of the melt or mixing of the different resins. The hot melt conveyor includes a diminishing pitch along its length and a short transition section and metering section. The hot melt is then formed into a desired profile through a cross-head die. A series of fiber rovings are introduced into the extrusion melt parallel and juxtaposed to at least one surface of the extruded product to reinforce the product.</p> |
