Shanghai Omega Machinery Co., Ltd has a specialization in the design and production of the best bimetallic barrel products. Qualified and friendly personnel of our company efficiently use an extensive range of equipment’s and ensure about the overall quality of barrel production. We do not fail to enhance every aspect of the bimetallic product manufacturing on a regular basis. As a result, we make our customers happy and get ever-increasing success rate in this competitive sector.

The Successful Barrel Manufacturer

Our company has long been recognized as the successful manufacturer of bimetallic barrel products by using the first-class materials and advanced resources. Every member of our staff is well experienced and trained to provide the best resources and solutions as per overall specifications of our customers. We get clients worldwide mainly because the overall quality of our affordable products. We improve our bimetallic product design and production process with an aim to make our customers satisfied.

Our company invests in the best-in-class resources and ensures about the overall quality of products in all categories. We efficiently use high-quality bimetallic material and enhance our products in different aspects. The bimetallic products give loads of benefits for all users because lower wear and high process stability, a good combination of wear and corrosion resistance and the correct wear protection system.

We have successful records for our bimetallic barrel production and happy clients all through the world. Once you have understood your requirements on the bimetallic barrel products, you can directly contact our company without any delay. You will get an instant assistance and ensure about the easy method to fulfil your wishes about the investment in the barrel products.

Get the Best Suitable Barrel within Your Budget

We offer different types of barrels made of high-quality bimetallic material. We provide the real images and the complete specifications of our products with an aim to assist all visitors to our company to directly choose and buy one of the most appropriate products. We understand that everyone has different requirements about the barrels. Our experienced personnel discuss with all new visitors to our company and assist such visitors to get the most expected barrels within the budget.

Regular updates of our equipment and technologies play an important role behind the notable success of our barrel production work beyond doubt. We invest in the most advanced resources and use successful techniques for producing the first-class barrels.

Omega provides custom-made twin barrels and liners used for twin screw extruders. We are also able to carry out the application of performance materials in order to mitigate any corrosion and abrasion.

High chromium cast iron Ω101A oval liner used for mixing of normal polymetric material.

High vanadium cast iron Ω102A oval liner used for high proportion glass fiber reinforcement.

Twin barrel with nickel based alloy bimetallic oval liner used to manufacture in corrosive conditions.

Liners can be provided for twin barrels

Two C-shaped bimetallic liners docking assembly

In the bimetallic C shaped lines, a common alloy layer is a boride cast iron with an excellent wear resistant performance. This alloy layer is Ω101, and is widely used in the twin extruder for modification markets.

ToIn comparison with an oval shaped liner, the two C shaped docking assembly is easy to make and install, leading to lower costs. However, this particular liner type features a few disadvantages, meaning the C shaped docking assembly cannot be used in a situation where the screw speed and back pressure are higher, as well as in situations where the polymer modification has higher physical performance requirements.

One piece of an Oval Liner

These is no joint gap due to the use of only a single piece. This ensures users do not need to worry about any polymer material falling into gaps, and there are no dead areas inside the barrel. This guarantees that there is no risk of material contamination, and ensures an excellent self-cleaning performance.

Stress inside the two acute angles after two C shaped liners are docked is avoided, reducing any risk of cracking inside the brittle iron base alloy layer.

Even though there is a need for more torque, a higher screw speed, and a higher back working pressure in a high end parallel twin screw extruder, users do not need to worry about any liner rotation or displacement such as what often occurs when two C shaped liners are used.

Bimetallic Oval Liner

Compared to the two C shaped lines above, a single oval liner has 3 significant advantages.

Inside two oval liner bores, there is an alloy protection layer, which is generally cast in two ways: one is an ordinary sintering process, and the other is the use of powder metallurgy high temperature molding by way of a PM-HIP static pressure.

The alloy clad layer of the bimetallic oval liner is usually made of a nickel-based alloy or cobalt-based alloy, and we can also add WC particles to improve the abrasive resistance of our products.

Recommended materials

Ω101A (The meterial type is high chromium iron)

Ω102A (The meterial type is high vanadium iron)

W6M5Cr4V2(M2) (The meterial type is high speed steel)

C12MoV(D2) (The meterial type is die steel)

Technique & Process Equipments for Making Oval Liner

Our company imported high-end CNC numerical control equipment used for the production of oval liners. Not only has this improved the cutting efficiency, but it has also improved liner manufacturing precision in a number of areas.

Service Life Comparison of Wear Resistant Ferroalloy Oval Liner

The above data is based on the test results provided by Material Test Center of Chinese Mechanical Industry(MTCCMI) and Test Center of Shanghai Material Research Institute(TCMSRI), the time is April 2014, on the same conditions of friction wheel, friction line speed and friction charge.

“Ω” Series alloy is researched and developped by us for inquiries of Germany W&P Company, specially to be designed to the Parallel Co-rotating Twin Screw Extruder combination barrel. Ω101A is the same as code name 043 of W&P Company, Ω103A is the same as the code name 99.3 of W&P Company, the wear-resistant ability of Ω102A is a little worse than Ω103A but with more cost-effective. Normally these two kinds of HVCI alloy oval liners are used on the feeding section for high percentage of GF reinforced due to they higher wear resistance than normal steel oval liner.

α101A Fe-based Oval Liner Can Be Cast By PM-HIP Way

The name of the Ω101A Oval liner with high-wear resistance feature produced by our company is one kind of high-chromium iron. Its corresponding material number to the Company of Werner & pfleiderer GMBH in Germany is 1.2292.2, which is also known as GP27M, or the name 043.

The high wear-resistant alloy which takes Ω101A as the Fe-base play a role in anti-wear by the uniform distribution of silicon carbide, manganese carbide, chromium carbide and other different types of micro-carbides in the iron substrate. Ω101A Oval liner can be cast by a normal precision casting technology, and the hardness could be HRC 58 over, And our company tried to take an advantage PM-HIP technology way to make this oval liner to see the different physical property.

PM-HIP way, that is one kind of high-temperature isostatic pressing molding method, the improved German high wear-resistant powder material with low expansion(Specially at high temperature) is filled in the mold cavity first, and then into a hot isostatic processing furnace, under a relatively high temperature and high pressure, the molecular of materials is moving speed-up under squeezing pressure, we could get a new oval liner with high-density and high-wear feature. The technique fills the blank of manufacturing the heart of the parallel Twin-screw extruder by high-difficulty technology in China and significantly meets the industry expectations.

The average of the Macro-hardness annotation of the Oval liner with Ω101A alloy made through the technology of PM-HIP is HRC 62 over.

Ω101A oval liner cast by PM-HIP way, has an equivalence in the whole set of content in steel and the physical properties to those of the high-wear white cast iron KmTBCr26. It’s other physical properties are as follows:

Intensity of tension: ≥350MPa

Breaking Strain: =0.03%

Melting range: 2020 ~ 2060 0F

Microstructure: Under-cast, it is eutectic carbide M7C3 + austenite; in the hardened state it is the eutectic carbide M7C3 + secondary carbide + fine needle-like tempered martensite + residual austenite (the Chinese letter M is on behalf of Fe, Cr and other metal atoms, C on behalf of carbon atoms)

Density: ≥8.50g / cm3

Thermal expansion coefficient: it is quite different from the average medium-carbon alloy steel. The average medium-carbon steel and its thermal coefficient of thermal expansion is proportional to the temperature, while the performance of alloy material Ω101A is to the contrary. It has an inversely proportional relationship between temperature and its heat. Experimental analysis of the average coefficient of thermal expansion can be compared as follows:

Material temperature Ω101A alloy Ordinary carbon steel

Line Expansion Coefficient Linear Expansion Coefficient

15 ℃ ~ 250 ℃ average 14.23×10-6/0F average of 12.68×10-6/0F

15 ℃ ~ 400 ℃ average 14.18×10-6/0F average of 12.78×10-6/0F

The above product manufactured through the PM-HIP technology is constrained by the company Werner & pfleiderer GMBH company, so the specific material formula is not allowed to release, please be understanding.

Chief Engineer Office / Shanghai Omega Machinery Co., Ltd



