タイトルまたは説明
PELLETIZING KNIFE MUST HAVE THE FOLLOWING
CHARACTERISTICS
Pelletizing knife can effectively work with fixed knife
(granulation die plate) under water at *0 ~ *0 C.
Hardness of pelletizing blade must be HRC **5 lower than that
of the cutting surface of die plate so that it can reduce the wear
of the die plate.
It should have high temperature resistance, corrosion
resistance, cavitation resistance and wear-resistant
properties.
It should have a lower affinity to the molten plastics, i.e.
uneasy to stick a knife.
Pelletizing knife should not be uneasily broken under abnormal
condition.
CHOICE OF PELLETIZING KNIVES
With the increasing grades and extending melting index of the
plastics, not only smooth die plate granulation surface, sharp edge
and small gap between cutting surface and knife blade are required,
the sharpness of pelletizing blade is also strictly required in the
granulation process of high melting index plastic.
In order to adapt to the production requirement of high
melting index plastics, the following measures should be taken for
the pelletizing knives:
When the cutting surface of die plate is very flat and the
cutter runs with it easily, metal-ceramic composite pelletizing
knives can be used. The edge width should be controlled below
2.5mm.
When the cutting surface of die plate is not very flat,
instrument steel with composite coating or fused composite
pelletizing knife may be used.
Adjustment of the hardness of the pelletizing blades makes
them more suitable with the hardness of cutting surface of the die
plate. Reducing the hardness of cutting edge of granulation knife
to HRC **9difference with the hardness of the granulation part of
die plate to ensure that the wear of die plate is lower than that
of the cutter.
METAL-CERAMIC COMPOSITE PELLETIZING KNIFE
THE FIRST TECHNICAL CHARACTERISTIC OF CERMET PELLETIZING
KNIVES-MATERIAL (COMPOSITION)
The so-called cermet is sintered by powder metallurgy
technology with a metal or alloy as the bonding phase and a
refractory metal compounds (mainly titanium carbide or tungsten
carbide) as the hard phase. The microstructure is characterized by
small hard-phase grains homogeneously distributed in metal or alloy
matrix.
The chemical composition of the metal ceramic materials
developed in Jinfeng Company mainly contains Ti, C, Ni, Cr etc.,
where NiCr is used as binder. Its heat and corrosion resistance are
better than that of Fe-based materials manufactured in Germany or
Japan. The reason is that Ni forms solid solution with Cr and the
hardness is maintained at elevated temperature of up to
**0℃. This can ensure that hard phase works
well and the wear resistance of cutter edge is
improved.
THE SECOND TECHNICAL CHARACTERISTIC OF CERMET PELLETIZING
KNIVES - MATERIAL CHOICE FOR THE KNIFE BODY
Suitable material of knife body should at least meet the 2
following requirements. â‘ a sufficiently high strength and
toughness. â‘¡ excellent welding performance with the cutting edge.
We have chosen high quality structural alloy steel or high quality
martens tic stainless steel of granulation knives for different
devices.
These two materials have respectively different
characteristics: â‘ Structural alloy steel knife body
production of abnormal devices under weak alkaline pelletizing
condition. â‘¡ martens tic stainless steel knife body with
good corrosion resistance and is used in stable operation with
adaptive devices under acid pelletizing condition.
Knife body: alloy steel or stainless steel
Knife blade: Cermet blade
| 国: |
China |
| モデル番号: |
JF-QLD
|
| 离岸价格: |
1650 ~ 6600 / Set ( Negotiable ) （交渉可能）
Get Latest Price
|
| ロケーション: |
China shenyang |
| 最低注文量の価格: |
1650 per Set |
| 最低注文量: |
1 Set |
| パッケージの詳細: |
wooden case packaging |
| 納期: |
within 15 working days |
| 供給能力: |
500 Set per Year |
| 支払いタイプ: |
T/T |
| 製品グループ : |
plastic granulator accessories
|
