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A method and system are provided that efficiently compound high levels of inorganic filler, processing fluid and silicone polymer at a commercial rate into homogeneous filled and devolatilized silicone compositions. In the method, filled silicone compositions are compounded by compounding a filler,

A method and system are provided that efficiently compound high levels of inorganic filler, processing fluid and silicone polymer at a commercial rate into homogeneous filled and devolatilized silicone compositions. In the method, filled silicone compositions are compounded by compounding a filler, processing fluid and silicone polymer in a first compounding apparatus to produce a first dispersed composition and simultaneously compounding a filler, processing fluid and silicone polymer in a second compounding apparatus that shares a common extruder shaft with the first compounding apparatus to produce a second dispersed composition. The system comprises a first compounding apparatus and a sequential second compounding apparatus that shares a common shaft with the first compounding apparatus. An extruder transition section of the system includes an enclosed discharge chamber defined by a first sectioning wall, a second sectioning wall and a contoured lower wall that transitions toward a discharge port and a shaft extends through the first sectioning wall, traverses the chamber and extends through the second sectioning wall.

대표청구항 ▼

A method and system are provided that efficiently compound high levels of inorganic filler, processing fluid and silicone polymer at a commercial rate into homogeneous filled and devolatilized silicone compositions. In the method, filled silicone compositions are compounded by compounding a filler,

A method and system are provided that efficiently compound high levels of inorganic filler, processing fluid and silicone polymer at a commercial rate into homogeneous filled and devolatilized silicone compositions. In the method, filled silicone compositions are compounded by compounding a filler, processing fluid and silicone polymer in a first compounding apparatus to produce a first dispersed composition and simultaneously compounding a filler, processing fluid and silicone polymer in a second compounding apparatus that shares a common extruder shaft with the first compounding apparatus to produce a second dispersed composition. The system comprises a first compounding apparatus and a sequential second compounding apparatus that shares a common shaft with the first compounding apparatus. An extruder transition section of the system includes an enclosed discharge chamber defined by a first sectioning wall, a second sectioning wall and a contoured lower wall that transitions toward a discharge port and a shaft extends through the first sectioning wall, traverses the chamber and extends through the second sectioning wall. sing including an inner surface defining a fluid passage, a port coupled to the housing and adapted to provide fluid communication between the fluid passage and the lift axle mover, a control valve configured to move between a lift position permitting the lift axle mover to move the wheels of the lift axle to the lifted position and a lower position controlling the flow of fluid between the source of pressurized fluid and the lift axle mover to move the wheels of the lift axle to the lowered position, a switch configured to move between a lift position controlling movement of the control valve to the lift position and a lower position controlling movement of the control valve to the lower position, the switch being configured to automatically move to the lift position when the vehicle is in the reverse condition, the switch being configured to automatically move to the lower position when the vehicle is out of the reverse condition, and a pilot valve supported by the housing and configured to control the movement of the control valve between the lift and lower positions. 2. The lift axle control system of claim 1, wherein the switch is electrical. 3. The lift axle control system of claim 1, wherein the pilot valve is mounted directly to the housing. 4. The lift axle control system of claim 1, wherein the pilot valve is electrically operated, the switch is electrically coupled to the pilot valve to control the pilot valve. 5. The lift axle control system of claim 1, further comprising a second switch configured to move between a lift position controlling movement of the control valve to the lift position and a lower position controlling movement of the control valve to the lower position and a second pilot valve supported by the housing and configured to control the movement of the control valve between the lift and lower positions. 6. The lift axle control system of claim 5, wherein one of the switches is coupled to the housing and the other of the switches is remote from the housing. 7. The lift axle control system of claim 5, wherein the switches are remote from the housing. 8. The lift axle control system of claim 5, wherein one of the switches is a manual toggle switch. 9. The lift axle control system of claim 1, further comprising another pilot valve configured to move the control valve between the lift and lower positions. 10. The lift axle control system of claim 9, wherein both pilot valves are supported by the housing. 11. The lift axle control system of claim 1, wherein the housing includes an interior region and the control valve is positioned in the interior region of the housing. 12. The lift axle control system of claim 1, wherein the control valve is configured to permit the flow of fluid from the source of pressurized fluid to the lift axle mover when in the lift position to move the wheels of the lift axle to the lifted position and the control valve is configured to permit fluid to exhaust from the lift axle mover when in the lift position to permit the wheels of the lift axle to move to the lifted position. 13. The lift axle control system of claim 12, wherein the control valve is configured to permit fluid to exhaust from the lift axle mover when in the lower position to permit movement of the wheels of the lift axle to the lowered position. 14. The lift axle control system of claim 1, further comprising a plurality of ports mounted on an outer surface of the housing, wherein the plurality of ports are in fluid communication with a plurality of fluid passages formed in the housing, the pilot valve is in fluid communication with at least one of the fluid passages, the control valve is positioned in an interior region of the housing, and the pilot valve is spaced apart from the interior region of the housing. 15. A lift axle control system for a vehicle having a forward condition providing forward movement of the vehicle and a reverse condition providing reverse movement of the vehicle, the vehicle incl