Radial Seal
Compression is applied perpendicular to the seal center-line
Ram
The portion of an injection machine that moves backward and forward to deliver the shot of resin to the nozzle and mold. the screw in a reciprocating screw machine
Ram travel
The distance the injection ram (or screw) moves in filling the mold
Rapid Prototyping
Fabrication of a physical, three-dimensional part of arbitrary shape directly from a numerical description (typically a CAD model) by a quick, highly automated and totally flexible process.
Reciprocating Seal
Seals used in moving piston and rod situations
Regrind
A process that finely grinds the rejects and flash pad, which would normally be thrown away as waste, by use of what's called a regrind mill. After this breakdown process, it is added to 30% of the same but virgin compound. This process is common with some silicone and viton compounds. The combination retains the same desirable properties but at a cost savings
Reinforcing Agent
Fillers, such as Carbon Black, added to the elastomeric batch mix to improve such physical properties as tensile strength
Resilience
The capability of returning to original size and shape after deformation
RF
Radio-Frequency
RH
Rockwell hardness
RH
Relative Humidity
RIM
Reaction injection molding
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