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.
Factors affecting the surface finish of the mold
✔️Heat treatment technology
If the heat treatment is not good
enough, it will result in uneven hardness of the steel surface or differences
in the characteristics of the steel, which will cause troubles for the
polishing personnel and make it difficult to polish.
Polishing technology is generally
considered to affect the roughness of the mold surface, but in fact a good
polishing technology is the first and the right heat treatment technology with
high quality steel in order to have excellent polishing effect; on the
contrary, polishing technology is not good, even if the quality of steel No
matter how good the mirror effect can not be achieved.
Polishing is mainly done by hand, so
human technology is still the main reason that affects the quality of
✔️Surface condition of the
During the processing of steel, the
surface may be damaged due to internal stress, heat or other reasons. Improper
cutting parameters may affect the polishing effect. The hardness of the
hardened thin layer is higher than the hardness of the substrate and must be
removed. It is therefore best to add a coarse grinding process to provide a
good basis for polishing.
The surface after EDM machining is
harder to grind than the surface after machining or heat treatment. Therefore,
EDM finish should be used before the EDM finish, otherwise the surface will
form a hardened thin layer. If the EDM refinement criteria are not properly
selected, the depth of the heat affected zone can reach a maximum of 0.4mm.
✔️Quality of steel
High-quality steel is the prerequisite for good polishing
quality. All kinds of entrained impurities and pores in the steel will affect
the polishing effect. In order to achieve a good polishing effect, the
workpiece must be marked with the polished surface roughness at the beginning
of the machining. When a workpiece is determined to require mirror polishing,
the polished steel must be selected and all have been heat-treated otherwise it
is not expected. effect.