Pellet Press Bulletin - Parr Instrument Company - #3

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Pellet Making With A Parr Pellet Press lower the die makes it possibleto produce pellets of any desired thickness using the maximum force of the press. When compressing light or fluffy materials the die can be raised after successive punch strokes to compensate for the reduction in the volume of the charge. The variable anvil setting can also be used as a means for adjusting the amount of pressure applied to a pellet. If duplicate pellets of equal den- sity are desired, these can be made by using equal amounts ofsample and leaving the anvil at a fixed setting while taking the punch through its full stroke when forming each pellet.
Infour easy steps:1. Fill the die. Set the die and itsholder on the base of the press with the beveled edge of the die resting on the flat surface in the reversible holder. Pour the charge into the die cavity and tamp with astirring rod, if necessary.
2. Compress the charge. Transferthe die and its holder to the press and push the lever down to compress the charge. To obtain maximum compression, the lever should require a firm push as it moves through its full stroke. If a full stroke is not obtained, turn the anvil to lower the die until the full mechanical advan- tage of the press can be utilized. Conversely, if the lever moves through its full stroke without encountering sufficient resistance, raise the die until firm compres- sion can be applied. 2 1 3 4 Construction Features The Parr pellet press is sturdily constructed with its parts arranged so that they can be easily cleaned and main- tained in good working order. Punches, dies and die plugs in 1/4, 3/8 and 1/2 inch sizes are made of polished T-303 stain- less steel. Any of these individ- ual parts can be replaced if they become worn or dam- aged, but for the best perfor- mance it is recommended that they be purchased and used in sets. Punches and dies in 1/8 inch and small metric sizes are made of 17-4PH stainless steel. These parts are heat treated for added strength and hardness, which gives the metal a charac- teristic dark color but does not alter its corrosion resistance. Punches and dies in these small sizes are sold only in matched sets.
3. Reverse the die holder. Raise the lever and slide the die and its holder out of the press. Reverse the holder to bring the deep cavity under the die and return the parts to their original position. The clearance under the punch will be limited when making thin pellets. In such cases it will be more convenient to grasp the die with one hand and slide it upward on the punch, holding it in that position while reversing the die holder with the other hand.
4. Eject the pellet. Bring the leverdown gently to eject the pellet into the cavity in the holder. If a thick pellet is not ejected by this stroke, turn the anvil to raise the die. The pellet will then drop out freely.Remove the pellet with tweezers or forceps; reverse the holder and repeat the cycle if additional pellets are required.
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pageCatalog pdf di En 2012-02-07-15