Jetting
A turbulent flow in the resin melt caused by an undersized gate or where a thin section becomes thicker
Jig
A tool for holding parts of an assembly during the manufacturing process
Knit Line
A molding defect resembling a flow-line found at the point where the rubber meets between the injections. This defect is caused from excessive lube or oily stock
Knit Mark
A witness mark on a molded part, often occurring at the midpoint between two transfer or injection sprue locations. It is caused by the incomplete joining of the uncured rubber or plastic from each sprue during the molding process
Knock outs
Normally pins or blades that, when activated internally to the mold, eject the part from the mold (also called "ejector pins")
Knockout Plate
A pin or thin plate that is driven into a mold cavity from the rear as the mold opens, forcing out the finished piece. Also called "knockout pin"
Knockout Rod
Bar that actuates the ejector assembly when mold is opened. Also called "knockout Bar"
Kotokast
Minnesota Rubber's protopying system for rubber parts
Laminar Flow
The flow of a resin in a mold is accompanied by solidification of the layer in contact with the mold surface that acts as an insulator through which material flows to fill the remainder of the cavity
Laminated Object Manufacturing (LOM)
A laser cuts the outline of a cross section, then a new layer of material is indexed, bonded to the previous layers, and cut. This process is repeated using very thin layers of material
Land
1) The horizontal bearing surface of a semi-positive or flash mold by which excess material escapes; 2) the bearing surface along the top of the flights of a screw in a screw extruder; 3) the surface of an extrusion die parallel to the direction of melt flow; 4) length of the gate from the runner to the cavity
LCP
Liquid crystal polymer
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