|
| |
 |
| |
| |
 |
Mixing means
dynamic phenomenon that diffuse materials to be distributed
equally to distribute minor ingredients centering on major ingredients
among several different materials, and controls the pre-mixed
material not to be separated again.
And mixer is a device to cause this phenomenon mechanically.
The representative form of powder mixing is as
follows.
1. Powder + Powder
2. Powder + irregular form(pellet, cheap, ball, grain, granule,
flake, etc.)
3. irregular form + irregular form
4. 1,2,3, + adding liquid |
| |
 |
There are
several factors to obstruct equal mixing in powder mixing such
as moisture or temperature in the air, but the factors causes
the most important influence are as follows.
1. Difference
in Size
2. Difference in Density
3. Difference in Shape
Among these factors, especially the difference in diameter
and density in material takes the most part of separating
phenomenon that occurs in mixing.
Each company tried hard in multiple ways to decrease this
separating phenomenon by adjusting the speed of body of rotating
and improving interior structure, but it was repeated, so
long-time mixing is required.
Longtime mixing becomes the cause of re-segregation in mixing
by causing needless centrifugal force or frictional force
in materials. Therefore, it decreases the quality of products
with abrasion.
|
| |
 |
In mixing
powder, there are two causes. One is caused by the difference
in diameter, diversity, and shape of mixed materials, and the
other is caused by the difference in diameter by emitting for
a long time.
To prevent these segregation, zero gravity mixer prevents segregation
that happens during mixing by creating zero gravity through
paddle-mechanism within mixer, and solved the segregation problem
in emission by equipping big bottom door. |
| |
 |
 Aspects
of mixing time |
| Longtime
mixing is the cause to increase abrasion between materials,
between material and machinery structure, and impulse, and the
biggest factor to raise specialization rate. And also it can
be considered as great loss in the aspect of production effect. |
| |
| Rotation
speed of body of revolution |
| Body of
revolution is the most important device to decide the performance
of mixer. In case of raising the speed, the impulse delivered
to material increases and becomes the cause of specialization.
And in case of decreasing the speed, as it causes longtime mixing
time not being smooth between materials, so equal mixture such
as specification etc. cannot be obtained. |
| |
| Aspects
of mixing principle |
Mixing method
can be divided into natural mixing and compulsive mixing representatively.
In case of the former, it has fetal defect in mixing performance
by protracting of mixing time, and in case of the latter, it
cases damage in material by impact by not according between
flowing speed of mixture and rotation speed of body of revolution.
Therefore, to overcome this problem, short mixing time and low
rotation speed of body of revolution are required. Zero gravity
mixer can get the best equal mixture in mixing materials having
high specification rate on the basis of these theories. |
| |
| |
| |
|
|
|
