Multicyl_Catalogue

r-IOVV ! I VVUWf'\~ Is IT IMPORTANT TO KNOW HOW MUL TICYL WORKS? Not really. Our patented design is like a car engine. internally it is quite complicated but , to the user it's very simple. You just put air in one end using a simple air valve and then you get hydraulic power out of the other end of the .- cylinder. WHAT IS THE PATENTED PRINCIPLE? Known as the "flow by" principle it al- lows the two-stage pressure intensifier to self- adjust anywhere on the overall stroke. This means that the cylinder will stall when it meets resistance greater than the force on the advance stroke. WHAT'S THE BENEFIT OF A TWO STAGE, SELF ADJUSTING STROKE? For the user there are several benefits: simple air controls; lower air consumption as the power is only produced when you need it. Also that there is no need to set the tooling to a pre- cise height (as would be necessary in a mechani- cal press) as the hydraulic action simply "bot- toms out" wherever resistance is greater. WHAT HAPPENS INSIDE THE CYLINDER DURING THE "FLOW-BY" ACTION? The ram advances using the "dashpot- principle until it meets resistance. Entrapped oil begins to "flow by" the low pressure piston by means of precisely controlled clearances as the piston rod is allowed to continue. I SPHERICAL PIVOT POINT (MC & XL SERIES) The ram piston and striker cap have a spherical pivot point designed to prevent inter- nal side loading. This feature reduces internal wear on seals and bearings and compensates for out of parallel tool conditions. A roll pin al- lows the striker cap to float and is designed to shear in extreme conditions. Small tools may be mounted upon the end of the spring returned ram piston. Air Piston ~Bi.stm Oil Reservoir Ram Piston Striker Ca THE "FLOW-BY" SELF ADJUSTING STROKE Low-pressure (LP) advance stroke. As air pressure is applied to the air piston the HP piston assembly advances. The LP piston valve immediately closes and the ram continues to ad- vance in a full linear fashion until resistance is encountered. Thereupon LP stroke is dissipated by the hydraulic "flow by" principle which per- mits the air cylinder to continue its advance while the ram remains stationary until the HP stage is reached. High-pressure (HP) power stroke. The HP piston rod seals the high-pressure chamber. The increased diameter of the HP chamber renders the LP piston powerless. This allows the oil to flow freely within the HP chamber as the LP piston advances. The force on the ram is increased due to the pressure being multiplied by the ratio between the areas of the air piston and the HP piston rod and the area of the ram piston. On the return stroke air is exhausted; LP valve immediately opens... allowing oil to flow directly through the piston. Springs return LP piston assembly and ram to "rest- position. single Acting Series shown and described