Patent ID: 8047701
Filing Date: 2011-11-01
Classification: B29B,F15B

Abstract:
1. A batch mixer, comprising: a mixer main body; a hopper provided for said mixer main body in a communicated state and into which mixing materials are charged; a floating weight provided in said hopper; a hydraulic cylinder that elevates/lowers said floating weight; a positional detection device including a sensor capable of continuously detecting an idicium of the elevating/lowering position of said floating weight and continuously outputting a positional detection signal; position setting means capable of setting the set value of the elevating/lowering position of said floating weight in plural numbers for setting the elevating/lowering position of said floating weight; a positional control device that controls the elevating/lowering position of said floating weight based on the positional detection signal of said positional detection device and a set value of said position setting means, wherein said positional control device controls the action of said hydraulic cylinder to match the elevating/lowering position of said floating weight to said positional set value; a pressure sensor that detects the pressure of pressure oil working onto said floating weight pressurizing side of said hydraulic cylinder; pressure setting means capable of setting the set value of the pressure in plural numbers for setting the pressure of pressure oil working onto said floating weight pressurizing side of said hydraulic cylinder; a remote-operating relief valve that lets out pressure oil, which is supplied from a hydraulic source to the hydraulic cylinder, to a tank side; and a pressure control device that controls said remote-operating relief valve based on a pressure detection signal of said pressure sensor and a pressure set value of said pressure setting means, wherein said pressure control device outputs a command signal to said remote-operating relief valve to match said pressure detection signal to said pressure set value.