When we talk about an 80+120+50 Overhead Production Line, we are not talking about three extruders simply placed next to each other. A complete production line has to work as one system. Material feeding, extrusion, die forming, cooling, traction, take-up, electrical control, and Auxiliary Equipment all need to match the product being manufactured.

At Wuxi Shuochuan Electromechanical Equipment Manufacturing Co., Ltd., we design extrusion production lines around the actual wire and Cable Production process. Our equipment is developed for continuous, stable, and practical manufacturing. The 80+120+50 configuration provides a multi-extruder platform for Production Processes that require different extrusion stages, materials, or layer structures.

We understand that cable manufacturers usually care about a few very practical questions. Can the line run steadily? Can the extrusion process be controlled? Is the finished product consistent? Is the line easy for operators to use? Can the equipment fit the existing workshop? And, perhaps most importantly, can the supplier understand the product before building the machine?

That is how we approach the 80+120+50 Overhead Production Line. We start with the product, then work backward to the equipment configuration. This page explains how the line works, what we focus on during production, where it can be used, and what buyers should consider before ordering an overhead wire and Cable Production Line.

1. What Is the 80+120+50 Overhead Production Line?

The name 80+120+50 Overhead Production Line generally indicates a production line equipped with three extrusion units with different nominal sizes. In this configuration, the 80, 120, and 50 represent the nominal sizes of the three extruders. The exact function of each extruder depends on the customer's product structure and process requirements.

This point is important. We do not assume that every 80+120+50 line should have exactly the same process arrangement. Different overhead wires and cables can use different insulation materials, sheath materials, layer structures, conductor sizes, and production speeds. Therefore, the final equipment configuration needs to be confirmed before manufacturing.

In a typical extrusion process, the conductor or cable core enters the production line from the unwinding section. The required polymer material is fed into the extrusion unit, heated and plasticized, and then pushed through a die to form a continuous layer around the cable.

After extrusion, the product moves through a cooling section. The cooling process helps the newly formed polymer layer stabilize before the cable reaches the traction and take-up sections.

With three extrusion units, the production line can be arranged to support more complex production requirements. Depending on the actual product, different extruders may be assigned to different materials or extrusion stages.

For example, one extrusion unit may handle a main insulation layer, another may be used for a secondary layer, and the third may support another required extrusion process. The actual arrangement depends entirely on the product specification.

Typical process flow

Unwinding → Material Feeding → Extrusion → Die Forming → Cooling → Traction → Inspection → Take-Up

For products requiring several extrusion stages, the process can include multiple coordinated extrusion and forming sections.

The main idea is simple: instead of treating each extruder as an independent machine, we connect the different stages into a continuous production system.

2. How an Overhead Wire Extrusion Production Line Works

Extrusion looks straightforward from the outside, but stable cable production depends on many small details. A good production line must keep material movement, temperature, extrusion, product speed, cooling, and winding under control at the same time.

Material feeding

The first step is supplying the selected extrusion material to the extruder. Stable feeding is important because inconsistent material supply can affect the extrusion process.

Depending on the material and production requirement, the feeding system may include suitable storage, conveying, and Metering arrangements. The exact equipment is selected according to the material characteristics and production process.

Heating and plasticizing

Inside the extruder, the screw transports the material through heated sections. As the material moves forward, it becomes soft or molten and reaches the condition needed for extrusion.

This stage involves several technical factors, including temperature control, screw design, material behavior, and extrusion pressure. We do not use one fixed temperature setting for every material. The correct process conditions must be established according to the actual material and product.

Die forming

Once the material reaches the die, it is formed around the conductor or cable core.

The die is one of the parts that directly influences the final cable shape. A suitable die should match the product dimensions, material, and extrusion process. If the die is not properly matched, problems such as uneven coating, poor surface appearance, or dimensional variation may occur.

Cooling

After leaving the die, the cable is still hot. It needs to pass through a cooling section so the extruded material can stabilize.

Cooling needs to be coordinated with line speed and product dimensions. Cooling too aggressively or too slowly can create process problems depending on the material and product. We therefore consider cooling as part of the complete extrusion system rather than as an isolated machine section.

Traction

The traction system keeps the cable moving through the production line. Its job may sound simple, but stable traction is important for continuous extrusion.

If the cable speed changes unexpectedly, the thickness and dimensions of the extruded layer may also change. This is why the extrusion system, traction system, and take-up system need to work together.

Take-up

At the end of the production line, the finished cable is collected by the take-up system.

Good take-up equipment should provide stable winding and suitable tension for the product. A neatly wound reel makes handling, transportation, storage, and the next production step easier.

3. Main Features of Our 80+120+50 Overhead Production Line

Our approach to the 80+120+50 Overhead Production Line is based on practical production requirements. We do not simply focus on the extruder itself. We consider the whole line and the way the different sections work together.

Three extrusion units for coordinated processing

The 80+120+50 configuration provides three extrusion units with different nominal sizes. This gives manufacturers a flexible platform for products that require multiple extrusion stages or different processing duties.

The exact assignment of each extruder should be decided according to the product. This can include different materials, different cable layers, or different process stages.

Continuous production structure

Wire and cable manufacturing is normally a continuous process. Once the line is started and the process becomes stable, production should continue smoothly from the beginning to the end.

We therefore pay attention to the connection between unwinding, extrusion, cooling, traction, and take-up. A production line should not have one strong machine and several weak supporting sections. Every part needs to work together.

Controlled extrusion process

Extrusion requires controlled heating, material movement, screw rotation, and forming. Our production line is designed to support practical process control so operators can monitor the main production conditions.

We also understand that different materials behave differently. The process settings used for one polymer cannot simply be copied to another. During commissioning, operating conditions should be adjusted according to the actual material and product.

Practical human-machine operation

Industrial equipment is used by people every working day. For us, an easy-to-understand operating system is not a small detail.

Operators need to start and stop the line, monitor production, adjust process conditions, check the cable, and respond to abnormal situations. A practical control arrangement can make daily production easier and reduce unnecessary confusion.

Flexible line configuration

We can discuss the configuration according to:

• Product type

• Conductor structure

• Insulation material

• Sheath material

• Product dimensions

• Required production capacity

• Extrusion process

• Take-up requirements

• Unwinding requirements

• Available factory space

• Electrical control requirements

• Additional auxiliary equipment

This configuration-first approach helps us avoid selling equipment that looks suitable on paper but does not match the customer's real production process.

4. Technical Considerations for Overhead Cable Manufacturing

When producing overhead wires or cables, the production equipment is only one part of the final product. The finished cable also depends on conductor design, insulation or sheath material, dimensions, process conditions, testing, and the applicable product standard.

For this reason, we always recommend defining the finished product before finalizing the equipment configuration.

IEC 60228:2023 is an important reference for conductors of insulated cables. The standard specifies nominal conductor cross-sectional areas from 0.5 mm² to 3,500 mm² for a wide range of electric power cables and cords. It also includes requirements related to wire numbers, sizes, and resistance values. The standard covers solid, stranded, and Milliken conductors made from copper, aluminium, and aluminium alloy for relevant cable applications.

For the extrusion process itself, insulation and sheath dimensions are also important. IEC 60811-201:2012 with amendments provides methods for measuring insulation thickness for common insulating compounds such as cross-linked materials, PVC, PE, and PP. IEC 60811-202 covers measurement of non-metallic sheath thickness for common sheathing compounds.

These references are useful when developing and checking a cable production process. However, we do not claim that an extrusion line automatically makes a finished cable compliant with any particular standard. The cable manufacturer remains responsible for product design, material selection, process validation, testing, and conformity requirements.

Reference data for cable production

Source: International Electrotechnical Commission official publications. The applicable standard depends on the final cable type and intended application.

Another important point is that not every overhead cable is covered by the same cable standard. IEC 60502-1:2021, for example, specifies construction, dimensions, and test requirements for certain power cables with extruded solid insulation at rated AC voltages of 1 kV and 3 kV for fixed installations. It is not a universal standard for every overhead cable application.

This is exactly why we prefer to discuss the product before recommending the equipment.

5. What We Confirm Before Building the 80+120+50 Line

A customized extrusion production line starts with accurate information.

Before production, we normally confirm the customer's product specifications, material requirements, expected production capacity, equipment configuration, and delivery schedule. This allows us to understand what the line actually needs to do.

We also discuss whether the customer needs additional unwinding equipment, spark testing, measuring equipment, auxiliary machines, special tooling, or other production accessories.

The more accurate the information is at the beginning, the easier it is to build a production line that matches the actual application.

6. Applications of the 80+120+50 Overhead Production Line

The main purpose of an 80+120+50 Overhead Production Line is continuous extrusion processing for overhead wire and cable products or related cable applications that require a multi-extruder configuration.

Depending on the final equipment configuration, potential applications may include:

• Overhead insulated Wire Production for electrical distribution applications.

• Overhead cable manufacturing where continuous insulation or sheath extrusion is required.

• Electrical wire production requiring stable polymer extrusion around conductors.

• Multi-layer cable production where several extrusion stages are needed.

• Special cable products requiring different materials or coordinated extrusion stages.

• Other industrial extrusion applications where the product structure matches the line configuration.

Because our company also manufactures photovoltaic wire and cable lines, automotive Wire Production Lines, electronic wire production lines, network communication cable lines, charging pile cable lines, and other extrusion equipment, we understand that different industries can have very different process requirements.

For example, an automotive wire may focus on small dimensions and stable insulation, while another cable may require a thicker sheath or multiple extrusion layers. The equipment should therefore be selected according to the actual product rather than according to the industry name alone.

7. How We Manufacture, Assemble, and Test the Production Line

We believe the quality of an extrusion line starts before the first machine is assembled.

Step 1: Technical discussion

We first communicate with the customer about the product. Drawings, cable specifications, material information, expected output, and existing production conditions can all help us understand the project.

At this stage, we also discuss the required 80+120+50 configuration and determine what each extrusion unit is expected to do.

Step 2: Configuration planning

After understanding the product, we develop the equipment configuration. This includes the extruders and the supporting systems required for feeding, forming, cooling, traction, take-up, control, and other production functions.

Step 3: Component manufacturing

The required components are prepared and manufactured according to the agreed technical arrangement. Mechanical components, electrical components, control equipment, and auxiliary systems all need to be considered as part of the complete line.

Step 4: Assembly

The different sections are assembled into a coordinated production system. Mechanical alignment and electrical connections are checked during the assembly process.

Step 5: Testing and inspection

Before shipment, we assemble, test, and inspect the complete production line according to the agreed requirements.

This pre-shipment stage is important. It gives us an opportunity to identify problems before the equipment reaches the customer's factory. It also gives the customer greater confidence that the line has been checked as a complete system rather than as a collection of separate machines.

Step 6: Packaging and transportation

After testing, the production line is prepared for shipment. We normally use moisture-resistant materials, protective cushioning, and strong export wooden cases or pallets according to the equipment structure and transportation requirements.

Transportation can be arranged by sea, air, or land depending on the destination, equipment size, and delivery schedule.

8. Why Work With Wuxi Shuochuan?

Choosing an extrusion line is not only about comparing machine models. For a complete production project, communication and technical understanding are just as important.

Wuxi Shuochuan Electromechanical Equipment Manufacturing Co., Ltd. integrates R&D, manufacturing, and sales. We have obtained more than ten utility model patent certificates and focus on developing efficient, energy-saving, and practical automated equipment.

Our product range includes high-speed extruders, three-in-one BV extrusion automatic production lines, three-in-one plus one BVVB automatic production lines, photovoltaic wire and cable production lines, automotive wire production lines, electronic wire production lines, network communication wire production lines, charging pile cable production lines, take-up and unwinding equipment, auxiliary equipment, and related raw materials.

This product range gives us experience across several types of wire and cable extrusion processes. It also means that when we discuss a new production line, we can look at the upstream and downstream equipment instead of focusing only on the extruder.

We focus on the complete production process

A cable extrusion line is a chain. If material feeding is unstable, extrusion can become unstable. If extrusion is stable but cooling is poorly matched, product dimensions can be affected. If the extrusion process is good but traction is inconsistent, the final cable can still have problems.

That is why we focus on coordination between sections.

We confirm requirements before production

Before manufacturing, we confirm product specifications, material requirements, production capacity, equipment configuration, and delivery schedule with the customer.

This gives both sides a clear understanding of what is being supplied.

We test the complete line before shipment

Before shipment, the complete production line is assembled, tested, and inspected according to the agreed requirements.

We believe this is one of the most useful parts of the manufacturing process. A machine may look good when it is standing alone, but a production line has to work as a complete system.

We provide the necessary delivery items

Standard delivery generally includes the complete extrusion production line, necessary components, technical documents, accessories, and other items specified in the order.

The exact supply scope is confirmed in the contract and technical agreement so that both the customer and supplier know what is included.

Our company philosophy

We follow the corporate spirit of “Quality First, Continuous Improvement, and Honest Service.”

For us, this is not just a sentence for a company profile. In daily equipment work, it means listening carefully to customers, improving equipment based on actual production needs, communicating clearly, and avoiding unnecessary promises.

9. What Should Buyers Compare When Selecting an Overhead Production Line?

When comparing suppliers for an overhead cable production line, we recommend looking beyond the total quotation price.

We also recommend asking the supplier to clearly define what is included in the quotation. A low initial price may not mean a lower total investment if important auxiliary equipment, tooling, controls, or other components are excluded.

For an industrial production line, the better question is often not “Which machine is cheapest?” but “Which configuration gives us the production process we actually need?”

10. Frequently Asked Questions About the 80+120+50 Overhead Production Line

What does 80+120+50 mean?

It generally refers to three extrusion units with different nominal extruder sizes: 80, 120, and 50. The exact function of each extruder depends on the customer's product and process requirements.

Is the 80+120+50 line suitable for overhead cables?

It is designed for overhead wire and cable extrusion applications that require a multi-extruder configuration. Final suitability depends on the conductor, insulation or sheath material, product dimensions, cable structure, production capacity, and required process.

Can the line produce multi-layer cables?

Yes, a multi-extruder configuration can be used for production processes involving multiple extrusion stages. The exact arrangement depends on the required cable structure and materials.

Can the extrusion line be customized?

Yes. We can discuss equipment configuration according to product specifications, material requirements, production capacity, factory layout, take-up requirements, auxiliary equipment, and other project conditions.

What materials can be processed?

The applicable materials depend on the final product and extrusion configuration. Customers should provide the material grade or technical information before equipment selection so that the extrusion unit, temperature control, tooling, and supporting equipment can be considered correctly.

Does the extrusion machine guarantee the final cable standard?

No. The extrusion machine is manufacturing equipment. Finished cable compliance depends on the complete product design, conductor, materials, dimensions, process conditions, testing, and applicable standards. For example, IEC 60228:2023 provides conductor-related requirements for applicable insulated cable products, while IEC 60811 provides test methods for insulation and sheath dimensions.

How long is the production lead time?

Lead time normally depends on the extruder models, line configuration, customization requirements, and order quantity. We confirm the expected delivery schedule with the customer before production.

What is included in the standard delivery?

Standard delivery generally includes the complete extrusion production line, necessary components, technical documents, accessories, and other items specified in the order. The exact supply scope is confirmed in the contract.

How is the equipment packaged?

We normally use moisture-resistant materials, protective cushioning, and strong export wooden cases or pallets. The packaging method depends on equipment structure, destination, and transportation requirements.

How can the equipment be transported?

We can arrange transportation by sea, air, or land according to the destination, equipment size, and delivery schedule.

What are the payment terms?

Payment terms are normally arranged according to the contract. A common arrangement includes a deposit before production and the balance before shipment, subject to the final agreement.

11. Our Approach to Your Overhead Cable Production Project

If you are considering an 80+120+50 Overhead Production Line, we suggest starting with a clear description of the cable you want to manufacture.

We need to know the conductor type, conductor structure, insulation material, sheath material, product dimensions, production capacity, and factory conditions. If you have a product drawing, technical specification, sample information, or existing production data, these details can make the equipment discussion much more accurate.

From there, we can look at the extrusion units, material feeding, dies, cooling, traction, take-up, control system, unwinding equipment, and other auxiliary systems.

Our goal is not simply to supply three extruders marked 80+120+50. Our goal is to create a complete overhead Cable Extrusion Production Line in which the different sections work together in a practical way.

For continuous wire and cable manufacturing, stable production comes from many small details being handled correctly. Material needs to feed steadily. The extrusion process needs to remain controlled. The die needs to match the product. Cooling needs to be properly coordinated. Traction needs to remain stable. Take-up needs to wind the finished product correctly.

When these parts work together, the production line becomes easier to operate and easier to manage.

That is the approach we follow at Wuxi Shuochuan Electromechanical Equipment Manufacturing Co., Ltd.: understand the customer's product first, configure the equipment around the actual process, assemble and test the complete line before shipment, and continue improving our equipment based on real manufacturing requirements.

If you are planning an overhead wire or cable production project, contact us with your product specifications, material requirements, target capacity, and factory layout. We can discuss the suitable 80+120+50 Overhead Production Line configuration for your application.