SPiDER Extrusion,a company specialized in extrusion tooling manufacturing, was established in 1988.
Since then, its experience and knowledge make a top-grade interlocutor for the cable&wire industry.
During these years, SPiDER Extrusion has developed thousands of tips and dies from simple single conductor to vcomplex multi-conductors, multi-layer, multi-stripe and special shape constructions.
How to solve the common problems in polishing
The biggest problem most frequently encountered
in the polishing process is "over polishing" which means that the
longer the polishing time, the poorer the quality of the mold surface.
If there is excessive polishing, there are two
phenomena: "orange peel" and "pitting"
The cause of "pitting" on the surface
of the workpiece
Because there will be some non-metallic
impurities in the steel, pitting from the surface of the steel during the
polishing process results in pitting corrosion. The reasons for pitting
corrosion are as follows:
1. The surface of the mold is rusted.
2. The black leather is not removed.
3. The polishing pressure is too high and the
polishing time is too long.
4. The purity of the steel is not enough and the
content of hard impurities is high.
Measures to eliminate pitting artifacts
1. Try to use the shortest polishing time and
minimal polishing power.
2. The softest polishing tool should be avoided
when the sand size is less than 1 mm.
3. Re-grind the surface carefully. The grain size
is a bit coarser than the grain size used previously. The final step of
grinding is done with a soft and crushed stone.
Elimination of the "orange peel" of the
When it is found that the surface quality is not
ideally thrown, many people's practices will increase the polishing pressure
and extend the polishing time, which will make the surface quality become more
The following methods can be used to remedy:
1) Perform stress relief at a temperature lower
than the tempering temperature of 25 °C, use the finest sand number before
polishing to achieve a satisfactory result, and finally polish with lighter
2) Remove the defective surface and grind it to a
coarser level than the previously used sand number, then grind it to a lesser
degree than before.
👆The cause of the "orange peel" on the
The rough surface is called "orange
peel", and there are many reasons to produce "orange peel". The
most common cause is due to overheating of the mold surface or excessive
carburization. Excessive polishing pressure and long polishing time result in
"orange peel". main reason.