| 摘要 |
An extruder (10) for extruding an associated material includes an extruder housing (16) that has a feed section (28), a center section that includes a throttle section, and an outlet section with an extruder screw disposed in the extruder housing. The extruder (10) also includes a throttle (58) at the throttle section. The throttle (58) has a plurality of pins that extend radially into the housing. The pins are adjusted by a cam (82) extending around the extruder housing (102). The cam (82) has an inner wall that has a plurality of cam surfaces engageable by pins. The radius of each of the cam surfaces gradually decreases from a maximum radius to a minimum radius distance. The pins have springs that urge the pins radially outward to contact the inner wall of the cam. The cam (82) is rotated by a piston and cylinder assembly. The extruder further includes sensors for temperature (112), gauge (124), weight (126), and other properties of the material. The extruder also has a control apparatus (118) for controlling the speed of the extruder and the throttle based upon any combination of temperature, gauge, weight, and production requirements while the extruder (10) is in operation. <IMAGE> |
