Ram

The mixer is equipped with a ram consisting of a rod and floating weight. It is held by an air operated piston in a cylinder. In the raised position the ram bottom (floating weight) is above the hopper door allowing for the introduction of material into mixing chamber. The ram is raised by compressing lubricated air. It is lowered by floating (no air) or by regulated air pressure. Normal pressures used are 80 to 100 psi 5.6 to 7.0 kg/cm2 with a maximum design pressure of 200 psi 14.1 kg/cm2. The stroke of the ram is cushioned at both ends. (a)--- Single type, (b)—double type, (c) single type ram in action The tell-tail rod indicates position of the floating weight. During normal mixing the material inside the chamber moves the ram up or down. How much motion there is, is directly indicated by the tell-tail rod to the operator who can thereby gauge the status of the mixing process. When the ram is in the raised position, a weight pin may be inserted under the bottom of the weight to hold it in place. Before attempting to do any work on the mixer, this pin must be inserted. It should be inspected regularly to ensure that it is in good condition. When the pin is in place, turn off the air supply to the cylinder and bleed both the raise and lower ram control valves. There are four type of bottom:- 1. Single slope v bottom 2. Single slope flat bottom 3. Double gable v bottom 4. Double gable flat bottom.

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