Types Of Plastic Injection Mold Polishing

Types Of Plastic Injection Mold Polishing
Introduction to the plastic injection mold polishing
These days, industrial products are developing in the direction of product high
quality as well as product diversification, in this way mold quality is going
to have an influence on product quality directly, so improving mold quality has
become an important task. Plastic injection molding polishing is a technology
that helps to obtain a smooth mold surface. It is very different from the
surface treatment of other industries. It has higher standards for polishing
process, smoothness, and geometric accuracy.

Types of plastic injection mold polishing service
(1) Mechanical polishing

Mechanical polishing is a method of removing the protruding part on the
workpiece surface by cutting or plastic deformation on the surface of the
material to obtain a smooth surface. Whetstone, wool wheel, and sandpaper are
usually used for manual operation; if the surface quality is high, the
processes of ultra-precision grinding and polishing should be used. This
technology can reach a surface roughness of Ra0.008 μm, which represents the
best value for mold polishing.

(2) Chemical polishing

Chemical polishing refers to the plastic injection mold polishing process of
immersing a material in a chemical medium to ensure the micro-protrusions on
the surface of the material dissolve before the dents to obtain a smooth
surface. The method can be used to polish workpieces with complex shapes and
can polish multiple workpieces at the same time, with high efficiency. The
surface roughness that can be obtained by chemical polishing is usually Ra 10
μm.

(3) Electrolytic polishing

The basic principle of electrolytic polishing is the same as that of chemical
polishing, which is to selectively dissolve the surface of the material to form
a smooth surface. Compared with chemical polishing, it can eliminate the
influence of the cathode reaction to produce a more significant effect.

(4) Ultrasonic polishing

Ultrasonic polishing is a method that uses ultrasonic vibration of the tool
part and uses abrasive suspension to polish brittle hard materials. The
workpiece is immersed in the abrasive suspension, and then placed in an
ultrasonic field together with the suspension, and the surface of the workpiece
is ground and polished by the action of ultrasonic waves. Ultrasonic machining
has a small macroscopic force, so it will not cause the deformation of the
workpiece.

(5) Fluid polishing

Fluid polishing relies on the flowing liquid and the abrasive particles it
carries to erode the surface of the workpiece to achieve the purpose of
polishing. Hydrodynamic grinding is driven by hydraulic pressure, the polymer
in the medium flows at low pressure, and the abrasive particles are usually
silicon carbide powder.

(6) Magnetic grinding and polishing

Magnetic grinding and polishing of plastic molding china refer to the use of
magnetic abrasives to form a brush under the action of a magnetic field to
grind the workpiece. The method has high processing efficiency, good quality,
and easy control of processing conditions. The surface roughness obtained by
this method can reach Ra0.1 μm.

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