The following guidelines should be followed.
- Gates and parting lines
should be put in non-appearance areas
- Integral parts should be used
to avoid welded joints
- Ribs and bosses should be designed to
eliminate sink marks
- Texturing can be used to break up large flat
surfaces and hide any defects, such as scratches
- The mold should be
designed with generous release angles to avoid the use of mold release agents,
which generally have a negative effect on adhesion. Silicon-type mold releases
are difficult to remove in a cleaning operation. If it is essential to use a
mold release, a stearate or soap type can be chosen.
- Wall
thicknesses should be sufficient to ensure rigidity
- In the case of
electrolytic plating, the plating uniformity, is a result of the current
density distribution, and must be considered in the initial design. Do not use
right angles or V-grooves, keep letters close to the surface, make angles as
large as possible, and crown large flat surfaces.
- The mold must be
highly polished.
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