Name: Extruder Bimetallic Barrel
Brand: Kotler
SKU: 244353977

Description

Technical Parameters

Why Choose Us

Rich Experience
Kotler has been engaged in the plastic machinery industry for more than 10 years, specializing in the production of plastic molding, wear-resistant and corrosion-resistant screw tubes for extruders, and special components.

Wide Product Range
Mainly used in the production of connectors, connectors, automotive precision components, optics, mobile phones, computers, precision gears, medical, special wires, plastics involving high temperature, high pressure, high corrosion, high wear PEEK, PPSU, LCP, PA46, PA66, PA4T, metal powder, neodymium iron boron, stainless steel powder, thermosetting BMC, bakelite, liquid silicone, optical PC, PMMA, etc.

Professional Technical Team
Kotler has an excellent team of professional design, R&D, manufacturing, sales and fast after-sales support, especially the designers who are proficient in the characteristics of various plastic raw materials, molding processes, molds and the characteristics of famous brand molding machines around the world. From customer consultation to design, quotation, manufacturing, installation and commissioning, we provide customers with one-on-one services!

Reliable Product Quality
Screw materials are purchased from Japan and Europe to ensure quality. We have independently developed HIP hot isostatic pressing sintered components and special centrifugal casting bimetallic barrels. the products of Kotler have passed ISO9001 quality management system certification.

What Is An Extruder Bimetallic Barrel?

An extruder bimetallic barrel is a type of barrel composed of two different alloys or metals. It is designed to enhance the performance and durability of extrusion and injection molding machines. The outer layer typically consists of a wear-resistant material, such as nitrided steel or tungsten carbide, while the inner layer is made of high-strength steel. The design of the extruder bimetallic barrel offers several benefits, including increased resistance to wear, corrosion, and high temperatures. Moreover, the bimetallic barrel design proves to be more cost-effective than a single-material barrel because only the wear-resistant outer layer needs replacement when it wears out.

Bimetallic Barrel For Injection Molding Machine

Centrifugal casting or rotocasting is a casting technique that is typically used to cast thin-walled cylinders. It is chiefly used to manufacture rotationally symmetric stock materials in standard sizes for further machining, rather than shaped parts tailored to a particular end-use.

Barrel In Injection Moulding

A cylinder that surrounds the screw and helps maintain the plastic's temperature and flowability. The barrel also transfers heat to and away from the material, and can have four or more temperature zones, including feed, rear, middle, and front. The barrel is a pressure-carrying vessel that can be made from bimetallic or tool-steel-lined materials.

Screw Barrel Injection Molding Machine

The screw barrel is a cylindrical component of an injection molding machine that's essential for processing plastic materials. It's located between the plasticizing screw and the mold cavity, and it works in conjunction with the screw to make up the machine's extrusion system.

Sintered Hard Alloy Barrel For Injection Molding Machine

Sintered screw, a very high corrosion resistance and wear resistance

Extruder Sintered Hard Alloy Barrel

Sintered barrel, a very high corrosion resistance and wear resistance

Single Screw Extruder Screw Barrel

The screw barrel of a single screw extruder is a hollow cylindrical enclosure that contains a single screw that pushes material through a die to create a product

Extruder Nitrided Steel Barrel

Automatic CNC lathe, milling machine equipment, deep hole boring machine, up to 10m depth nitriding and automatic heat treatment equipment; Professional operators to ensure the accuracy of each process; Various mixing heads design to meet the plasticizing requirements of different plastics.

Barrel Screw Extruder

The extruder screw barrel is a hollow cylinder that surrounds a screw and is a key component in plastic processing machines and food processing. The barrel's purpose is to maintain the temperature and flowability of the material while the screw melts, mixes, and blends raw materials into the desired product.

Extrusion Screw Barrel

The extrusion screw barrel is a hollow cylinder that surrounds a screw and is a key component in plastic processing machines and food processing. The barrel's purpose is to maintain the temperature and flowability of the material while the screw melts, mixes, and blends raw materials into the desired product.

Advantages of Extruder Bimetallic Barrels

01/

Wear Resistance: The primary benefit of extruder bimetallic barrels is their wear resistance. The outer layer is typically made of wear-resistant materials such as nitrided steel or tungsten carbide, which significantly reduces wear and tear during processing.

02/

Corrosion Resistance: Extruder bimetallic barrels are also resistant to corrosion. This is crucial due to the highly corrosive nature of some plastic resins used in processing, which can damage standard barrels. The inner layer, usually made of high-strength steel, provides corrosion resistance.

03/

High-Temperature Resistance: Extruder bimetallic barrels can withstand high temperatures encountered during plastic processing. The outer layer is designed with materials that can endure these temperatures, enhancing barrel longevity.

04/

Cost-Effectiveness: Compared to single-material barrels, extruder bimetallic barrels are more cost-effective. Only the wear-resistant outer layer needs replacement when worn, reducing maintenance costs and downtime.

Application of Extruder Bimetallic Barrels

Plastic Extrusion: Widely used in producing plastic pipes, sheets, wires, and profiles, especially with abrasive materials like PVC, PP, and PE. The wear-resistant inner layer prolongs screw barrel life and ensures uniform material extrusion.

Injection Molding: Ideal for high-wear and corrosion-resistant plastics such as glass fiber reinforced polyamide (PA6-GF), ensuring durability and quality in injection molding.

Plastic Recycling: Essential in recycling processes to handle diverse plastics, enhancing sustainability and product quality.

Cleaning of Extruder Bimetallic Barrels

Barrel Cleaning Methods: Use specialized barrel cleaners for efficient cleaning, especially when changing materials with different processing temperatures.

Refueling and Ejection Method: Adjust heating to match new material plasticization temperatures, ensuring thorough cleaning.

Maintenance During Shutdown: Clean thoroughly and apply anti-rust measures to prevent damage during prolonged shutdowns.

Design Principles of Extruder Bimetallic Barrels

Material Characteristics

Tailor design to specific plastic material properties such as melting temperatures and viscosity for optimal performance.

Process Requirements

Adapt barrel design for different processes like extrusion or injection molding to enhance efficiency.

Product Specifications

Adjust design for different product shapes and sizes, ensuring compatibility and performance.

Use and Maintenance of Extruder Bimetallic Barrels

Routine Maintenance

Regular upkeep ensures operational efficiency and longevity, focusing on cleanliness, lubrication, and part inspection.

Scheduled Maintenanc

Detailed inspection and replacement of worn parts after specified operational hours to maintain performance.

Precautions

Prevent damage from foreign objects, maintain cleanliness, and use appropriate lubricants to ensure smooth operation.

Enhancing Screw Barrel Performance with Bimetallic Composites

Improved Wear and Corrosion Resistance

Utilize hard alloys for wear resistance and corrosion-resistant materials for longevity.

Optimized Thermal Conductivity

Enhance heat transfer for efficient processing and reduced energy consumption.

Reduced Friction

Minimize heat generation and wear with low-friction materials.

Strength and Temperature Resistance

Ensure durability under high pressures and temperatures encountered in processing.

Extended Service Life

Longer operational times and reduced downtime with improved durability.

Temperature and Processing Considerations

01/

Temperature Control: Maintain precise temperatures for optimal plasticization without overheating.

02/

Heat Distribution: Ensure uniform heat distribution along the barrel for consistent melt quality.

03/

Material Compatibility: Match temperature settings to plastic material requirements to avoid degradation.

04/

Cooling Systems: Use cooling systems as needed to prevent overheating and maintain barrel integrity.

05/

Operational Settings: Adjust screw speed and pressure for efficient processing and reduced wear.

06/

Cleaning and Maintenance: Follow manufacturer guidelines for cleaning and upkeep to maximize barrel lifespan.

Our Factory

Suzhou Kotler Precision Machinery Co., Ltd is located in the city of Suzhou, "where there is a paradise above and Suzhou and Hangzhou below." Kotler is located in the southwest of Suzhou city, west of the Taihu scenic area 2 km, south of Dongshan scenic area, north of Suzhou ring expressway 1 km, and east of Suzhou central elevated road. It is an important manufacturing base in east China with convenient transportation. The superior transportation position is an important reason for setting up the factory.

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Our Certifications

Ultimate FAQ Guide to Extruder Bimetallic Barrel

Q: What are the advantages of a bimetallic screw barrel?

A: A bimetallic screw and barrel allow for optimal extruder performance, strength, resistance to fatigue, and increased process control. Throughout the lifetime of an extruder machine there are several factors that will put extra strain on the extruder, the following are the most important.

Q: What is the function of the extruder barrel?

A: The basic working principle of the extruder screw and barrel is to melt and compact the polymer, push it to the mold at constant pressure, constant temperature and constant speed, and form a parison in the molten state of the product through the mold.

Q: What is a bimetallic screw barrel made of?

A: Bimetallic screw barrel are made of two metals or two alloys of metals and mostly coated with extra layer of carbides and other commercial coating material. Bimetallic screw barrel are not different type of screw barrel, like advanced designing etc. A same design screw can be made in Nitrided way and Bimetallic way.

Q: What is the pressure in the extruder barrel?

A: The pressure inside the extruder barrel during the extrusion process is high. Barrels for most extruders are designed to withstand operating pressures up to 10,000 psi or 700 bar. Normal operating pressures generally range between 1,000 and 5,000 psi. or 70 and 350 bar.

Q: What is the difference between extrusion and extruder?

A: Extrusion may be defined as a process for making a product (an extrudate) by forcing a material through an orifice or die to form a shape, or alternatively, the production of finished, or semi-finished products, using an extruder.

Q: What is the working principle of extruder?

A: The working principle of sheet extruder machine is to convert solid plastic into uniform melt by pressure and shear, and then send it to the next process. The production of melt involves additives such as color masterbatch, resin blending, and re-pulverization.

Q: What are the basic components of extruder?

A: A motor.
A drive system to control the motor.
A gearbox.
An extruder barrel.
An extruder screw.
A system for heating and cooling various extruder components.
A feed system to introduce plastic pellets into the extruder barrel.

Q: How do I know if my extruder is too low?

A: You can recognize under extrusion when there is material missing in your print's layers. Printed objects with under extruded layers can be fragile and tend to break apart.

Q: What is the function of the barrel in the extruder?

A: The barrel of a vented extruder contains a vent or port that is used to reduce the water (moisture) and/ or volatile content of a plastic material. The melt is decompressed partway along the barrel by reducing the screw root diameter.

Q: What is the rpm of an extruder machine?

A: In most extruders it is somewhere around 100 rpm. One exception to this is the twin-screw extruder used for rigid PVC pipe and profiles, and lately for PET sheet and other resins, as well. These screws run more slowly-30 rpm is high!

Q: What temp should extruder be?

A: The recommended extrusion temperature range is between 225-250°C reckoning on the sort of a 3D printer and a TPU filament you have. However, mind that printing with higher temperatures can permit the filament to soften quicker and to flow easier from a nozzle.

Q: What is the clearance between extruder screws and barrel?

A: Barrels are steel cylinders usually lined with a wear-resistant alloy. The clearance between the screw flights and the barrel on new screws is between 0.005 and 0.010 in. (0.125 to 0.25 mm), less for very small screws and more for very big ones.

Q: What is extruder flight depth?

A: The flight depth is the gap between the screw and the barrel. The flight depth ratio is the ratio of the flight depth in the feed section and the flight depth in the metering section (Screw Designs BASF). The flight depth ratio is typically between 2 and 3 for injection molding.

Q: What is the gap between screw and barrel?

A: Taking a 50mm dia screw for example, the minimum gap should be 0.10mm or 0.015mm (max) for a larger 152mm dia screw, the minimum gap should be 0.30mm with a maximum of 0.35mm. Ideally there should be 1000th of an inch or 0.0254mm per side.

Q: What is the tolerance of screw and barrel wear?

A: The barrel inside diameter is typically the nominal diameter with a tolerance of 0.001 in. oversize. Clearance distance beyond this is due to wear.

Q: Why is hopper throat cooling necessary for barrels?

A: To ensure that material freely enters the feed section of the screw, cooling water is generally passed around the hopper throat assembly. The flow rate and temperature of the cooling water is important, as these variables affect how the material is converted from solid to melt (plasticized) within the barrel.

Q: What is the clearance between extruder screw barrels?

A: In order to avoid the occurrence of the extruder screw lock, when designing the extruder, the gap of the extruder screw barrel in the feeding section is increased, that is, the diameter of the extruder screw in the feeding section is reduced to at least 0.002 mm per millimeter.

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