 |
| |
| 1) The Research Institute of Industrial Technology: Cutting oil sterilization unit performance test. |
| The purpose of cutting
oil sterilization system is to remove and inactivate
microbe, which is a cause of decay of cutting oil.
The main cause of deteriorating the capacity of
cutting oil is microbe so it is determined that
the cutting oil can be used for a long time without
replacement if the propagation of microbe is controlled
continuously. |
| |
| ※ Experiment result |
| It is found that it
has an outstanding sterilization capacity and effect
on the removal of bad smell. The microbe growing
in cutting oil can be perfectly handled by cutting
oil sterilization system and it is effective for
removing bad smell, thus, it is expected that it
will contribute to the improvement of working environment.
Moreover, because cutting oil is continuously used
by circulation, it is expected that the sterilization
effect will be enlarged by aerating cutting oil. |
| |
| <
Sterilization and removal capacity of fungi and
decay smell by contact time > |
| Bacillus
type |
Before contact |
Removal
ratio(%) |
Contact
time |
Density
of sterilization gas |
Remarks |
| Colon
bacillus |
105 CELL |
100 |
5
sec |
0.35
ppm |
Microbe |
| Influenza
virus |
105
CELL |
100 |
5
sec |
0.35
ppm |
Microbe |
| Mold |
106 CELL |
100 |
20
min |
0.5
mg/l |
Bacillus |
| Salmonella |
107 CELL |
100 |
10
sec |
0.5
mg/l |
Bacillus |
| Ammonia
NH₃ |
|
No
olfactory detection |
10
min |
0.9
mg/l |
Smell
of rotten mean |
| Sulfureted
hydrogen H₂S |
|
No
olfactory detection |
5
min |
0.9
mg/l |
Cutting
oil |
| Trimethylamine(CH₃)₃N |
|
No
olfactory detection |
7
min |
1.2
ppm |
Smell
of rotten fish |
| 개전성
hepatitis virus |
105
TCD |
100 |
10
sec |
2.0
ppm |
Microbe |
| Bacillus
cereus |
105
TCD |
99.99 |
10
min |
2.0
ppm |
Spore of bacillus genus |
| Aspergillus
usami |
105
TCD |
99.99 |
10
min |
0.3~0.5
ppm |
Filamentous |
| Candida
paracreus |
105
TCD |
99.99 |
10
min |
0.3~0.5
ppm |
Yeast
fungus |
|
| |
| 2) National Institute of Environmental Research: Sterilization experiment |
| Receipt
No. |
Item |
Number
of general bacillus(CFU/ml) |
Remarks |
Min 33 |
Cutting
oil (before treatment) |
6.5
X 105 |
|
Min
33 |
Cutting
oil (after treatment) |
Non
|
|
Min
33 |
Painting
water (before treatment) |
6.5
X 105 |
|
Min
33 |
Painting
water (after treatment) |
Non
|
|
|
| |
 |
| |
| 1) The Research Institute of Industrial Technology : |
| Although ozone has
a good sterilization and smell removal effect, if
the basic property of cutting oil is changed, it
may cause another problem. Therefore, in order to
check whether the property of cutting oil changes
after ozone treatment, the experiment is performed.
|
| |
 |
After pouring 15L of 5% diluted solution
to 20L vessels, one vessel is stationed and
another vessel is aerated for 24 hours. After
that, property changes of cutting oil were
compared and analyzed. |
| |
|
 |
After aeration using sterilizer, there was
no change in capacity and property of cutting
oil. It was found that there was no change
in property of cutting oil in the results
of IR analysis and experiment. |
|
| |
| Category
|
정치액 |
After aeration |
|
External view
|
Milk-white
emulsion |
No
change |
| pH
|
9.6 |
No
change |
Number
of
alive bacillus |
Bacteria |
No
creation |
No
change |
| Fungi |
No
creation |
No
change |
| Density
of cutting oil ( Brix % ) |
5 |
No
change |
| Density
of chlorine ion ( ppm ) |
12 |
No
change |
|
Capacity of anti-corrosion
(Casting chip
method) |
1
hour |
No
corrosion |
No
change |
| 2
hour |
No
corrosion |
No
change |
| 3
hour |
No
corrosion |
No
change |
| 6
hour |
No
corrosion |
No
change |
| 12
hour |
No
corrosion |
No
change |
|
| |
| 2)
Cutting oil manufacture company : B Chemical |
| It showed good result
in comparative experiment that sterilizes undiluted
solution of cutting oil and decayed cutting oil
with mild oxygen. |
| |
|
After pouring 15L of 5% diluted solution
to 20L vessels, one vessel is stationed and
another vessel is affected by ozone generator
for 24 hours. After that, property changes
of cutting oil were compared. |
|
| |
| 3)
Cutting oil manufacture company : S Oil |
| If the propagations
of fungi and bacteria are suppressed in water-soluble
cutting oil, the lifespan of cutting oil increases
to the degree that it can be maintained just by
adding oil. |
| |
 |
| |
 Base
oil : The oil for manufacture of cutting oil
Emulsifying
agent : The additive for emulsifying base oil
in water
Anticorrosive
: The additive for preventing rust
Extreme
pressure agent : The additive for endowing the
property of extreme pressure.
Anti
abrasive agent : The additive for endowing tool
with the property of anti-abrasion .
Antifoaming
agent : The additive for preventing foam of
cutting oil .
Coupling
agent : The additive for harmonizing other additives.
Sterilizer
The additive for killing bacteria and fungi
Other
additives |
