An operation in which the tool is not engaged in the workpiece. Such an operation may include a rapid tool movement, a tool replacement, repositioning the workpiece, inspecting the workpiece, etc.
The occurrence of molten material seeping out of the mold cavity and solidifying. Once the part is ejected, a thin layer of material will have formed attached to the part along the parting line.
The temperature of the interior mold surfaces before the molten material is injected. Usually, cooling lines inside the mold keep this temperature low and aid in cooling the molten material.
The distance that the rear mold half must travel in order to be securely clamped to the front mold half. The clamp stroke must be large enough to allow the part to be ejected from the mold.
A plastic predominantly used for film applications because of its toughness, flexibility and relative transparency. Typical products include grocery bags, garbage bags and landfill liners.
The ratio of a material's mass to its volume at a given temperature and pressure, typically measured in kg/m^3, g/cm^3, or lb/in^3. Water is 1.0 g/cm³ at 25°C and 1 atmosphere of pressure.
The percentage of material that becomes unusable, and hence lost, during the melting process. Melt loss is typically a result of oxidation during the melting and holding of the material.
The length of the neutral axis between the bend lines, or in other words, the arc length of the bend. The bend allowance added to the flange lengths is equal to the total flat length.
