Good Double Screw and Barrel for Plastic Machinery Twin Screw
Extruder Machine Segment Barrels Bimetallic Alloy PE Sheet PP PVC
Pet Barrel
Descriptions
Twin screw barrel is gradually adopted by many manufacturers
because of its high efficiency. Compared with single screw barrel,
twin screw barrel has higher requirements for machining clearance.
Our company has a professional team to help users solve design
problems, and can also process according to the samples or drawings
provided by customers.
injection screw barrel and bimetallic injection screw and barrel by
materials 38CrMoAlA or 42CrMo and so on,for many type of injection
mould machines,such as HAITIAN,CHEN HSONG,JSW,HAITAI,BRCHO,and so
on.
The main screw and barrel of the split twin screw extruder adopt
advanced "building block" design. The screw is composed of various
screw blocks installed on the core shaft and inner lining of the
cylinder, forming a sleeve that can be adjusted according to
different screw blocks. The ideal structure of the screw components
can be flexibly combined according to the process requirements of
the material variety, achieving the transportation, refining,
shearing, and discharging of materials. This effectively solves the
contradiction between the universality and specificity of the screw
that is difficult to consider and achieves the goal of one machine
with multiple functions. Another advantage of the "building block"
design is that worn screw and cylinder components can be partially
replaced, avoiding the scrapping of the entire screw or cylinder,
greatly reducing the maintenance costs.
1. Segments and Functions of the Screw:
The screw is generally divided into five segments: feeding segment,
melting segment, mixing segment, venting segment, homogenizing
segment.
1. Feeding segment:
This segment is responsible for conveying the material and
preventing overflow.
2. Melting segment:
In this segment, the material is fully melted and homogenized
through heat transfer and frictional shear.
3. Mixing segment:
The mixing segment further refines and homogenizes the size and
distribution of the material components,
creating an ideal structure with dispersion and distribution mixing
functionality.
4. Venting segment:
This segment is used to exhaust impurities such as water vapor and
low molecular weight substances.
5. Homogenizing (metering) segment: The homogenizing segment is
responsible for conveying and pressurizing the material, increasing
the density of the material at the extruder outlet to a certain
extent, establishing a certain pressure, and achieving more
thorough mixing to ultimately achieve a stable foundation.
1. Diameter of screw: D12-D300mm
2. L/D ratio of screw: 10 - 26
Grade available:
1. Standard grade: 38CrMoAlA + nitriding 96 hours
2. Bimetallic grade: 38CrMoAlA + bimetallic alloy
3. TC-A grade: Tungsten carbide 35%
4. TC-B grade: Tungsten carbide 25%
5. TC-C grade: Tungsten carbide 15%
Injection screw barrel and bimetallic injection screw and barrel
1)38CrMoALA(JIS SACM645)
2)42CrMo(JIS SCM440)
3)9Cr18MoV
4)CW6Mo5Cr4V2
5)Various high quality alloy steels,According to different usage,
the choose for alloy is different, some require for
abrasion-resistant while some require for corrsion-resistant. For
standard, we have Fe-based, Ni-based,W2Calloy,Tunsten alloy etc for choice.
Application:
Rubber,various high glass fiber, mineral fiber and PPA,PPS, PA66,
LCP,VO fire protection, ferrous power, magnetic powder and etc.
Treatment:
Heat-treatment
Nitriding treatment
Electroplate hard-chrome
High-frequency quenching
Spraying corrosion wear-resisting dual metal layers
Vacuum quenching
Bloom supplies cylinder barrel suitable for the following extruder
products lines :
-APV -KOBE -OMC
-Buhler -KraussMaffei -Theysohn
-Buss -Berstorff- -Toshiba
-Clextral -Labtech -USEON
-Lantai - others
-JSW -Leistritz
-Keya -Maris
Types of Barrels
Standard for classification: Design geometry Standard for classification: With inner or not
* Feeding barrel * Solid barrel
* Closed barrel * Barrels with inners
* Vent barrel
* Combi barrel
* Extended degassing barrel
* Combi barrel with backward venting
We offer a broader choice of materials:
Solid barrels
*Nitrided steel barrels *Tooling steel barrels *Bimetallic
Barrel with installed inner
* made of PM-HIP solid *WR13
By working closely with customers in choosing optional materials,we
can minimize wear and tear and associated costs.
