Anvil roll

Six different brand names of caps designed for use in toy guns were examined, two of which were the paper roll type the others were the individual plastic cup type that is placed on the anvil of the toy gun. 

Formerly the edges of the heated blank were welded upon the mandrel by the successive blows of a trip-hammer, or a dit)p, dies intervening between the iron tube and the drop and anvil respectively. A portion only of the seam is closed at a time by this means, and the o[ieration is more tedious an l expensive than the rollers just described. The rolling process was introduced from England. 

Roll crushers are size reduction devices that shear (or compress) the material that is to be reduced in size. The surfaces used can take the form of a rotating roll and a stationary anvil, or two equal-speed rolls rotating in opposite directions. The surfaces of the rolls can be smooth, corrugated, or toothed. The particular design of the teeth and corrugations is critical in keeping the production of lines and dust to a minimum (Roman, 1967). 

For measuring and testing the friction sensitivity, samples of energetic compounds are exposed to friction forces that are generated by different setups and methods. " In the ABL (Allegheny Ballistics Laboratory) Sliding Friction Test the sample is pressed by a steel roll with an adjustable force on an anvil which is accelerated by the impact of a... 

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