Nautilus can also calculate how the steel dimensions of a mold need to be adjusted so that the parts can hit the
nominal dimension. The software has built-in worksheets for the various scientific molding studies, including viscosity curve, cavity balance, pressure drop, cosmetic process window, gate seal and cooling time.
By controlling the line speed or extruder RPM, the product parameters are adjusted to the
nominal dimension. The typical return time (ROI) for the investment is 6 to 8 months, the company adds.
Figure 1(a) shows an assembly of ten components with identical
nominal dimension, in which the component parts are put together circular structure.
Increases in dimensional variability can be expected to cause a slight increase in expected tool life, while
nominal dimension shifts within customer tolerance limits have a stronger impact.
Adding half the dovetail width to the .433 dimension, we get a
nominal dimension of .620 inch.
If the designer created a valid solid model, then every detail and
nominal dimension are available to the programmer without looking for drawing dimensions.
The 2 x 4 dimension is the
nominal dimension and is used when the product is sold.
The blocks have a
nominal dimension of 8 x 8-in., which means that the actual block is a bit smaller.
The critical dimension on the part print is given as 4.941 [+ or -] 0.008 in., and the actual mold shrinkage value for a part molded to the
nominal dimension is 0.02197 in./in.
As input data we have the measurement results of a 50 parts batch, the
nominal dimension and the lower and upper deviations limits of the tolerance field.
Both dimensional variability and
nominal dimension of the star test casting fin thickness were analyzed as a function of clay content, pouring temperature, sand compactability and shakeout time.
An increase in shakeout time increased the
nominal dimension across the parting line and in the drag.