초록 ▼

Process and product for manufacturing continuous fiber reinforced sheets and shapes. A pressurized extrusion process consisting of a paired and edge enclosing doctor blades that remove feed material from a pair of pinch rolls and contain such in an optimally heated environment and which provides sui

Process and product for manufacturing continuous fiber reinforced sheets and shapes. A pressurized extrusion process consisting of a paired and edge enclosing doctor blades that remove feed material from a pair of pinch rolls and contain such in an optimally heated environment and which provides suitable hot dies and enables extrusion of continuous reinforcements, cores or threads to be contained in the extrudite. Hopper feedable plastic pellets containing reinforcing fibers which are longer than the largest pellet dimension are disclosed. The fibers in an elongated web of fiber reinforced plastic are caused to be wrinkled or folded prior to cutting the web into pellets. One form of apparatus includes a set of conveyor rollers for moving the web, with later rollers moving more slowly that the input rollers, in conjunction with a crowding doctor blade which forces the web with a creping action from the input rollers. Also fabrication of a continuous web of continuous fiber reinforced plastic material includes supplying a continuous substantially linear collection of fiber strands at a first velocity and saturating or impregnating that linear collection of strands with a plastic. The linear strands may be coated by passing the strands through a heated plastic extruding crosshead die. Thereafter, motion of the plastic coated linear strands is impeded so as to increase the cross-sectional area and deform the strands from their linear.

대표청구항 ▼

The process of producing heat softenable, hopper feedable plastic pellets containing reinforcing fibers comprising the steps of: forming an elongated web of fiber reinforced plastic material; moving the web in the direction of web elongation along a path; impeding the progress of web motion at a sel

The process of producing heat softenable, hopper feedable plastic pellets containing reinforcing fibers comprising the steps of: forming an elongated web of fiber reinforced plastic material; moving the web in the direction of web elongation along a path; impeding the progress of web motion at a selected location along the path so that web speed along the path subsequent to the selected location is less than the web speed along the path prior to the selected location causing the web to wrinkle thereby folding the reinforcing fibers to increase the fiber length per unit of web length; and subsequently cutting the web into individual pellets.