6 Faqs about Plastic Extrusion Lines

2022-07-01 16:34:19

Plastic extrusion lines are a cost-effective solution that allows companies to produce multiple products all in one process. There are, however, often some misconceptions about the equipment and processes involved. Let us answer some of your most frequently asked questions about plastic extrusion lines.

6 Faqs about Plastic Extrusion Lines

What is a plastic extrusion line?

Plastic extrusion is the process of melting plastic material, forcing it through a die to achieve the desired shape, and then allowing it to cool. It is used in the manufacturing of pipes, tubes, straws, roofing sheets, and more.

In the plastic extrusion process, raw thermoplastic material, or resin, is gravity fed from a top-mounted hopper into the barrel of an extruder. The material is gradually melted by the mechanical energy generated by turning screws and by heaters arranged along the barrel. The molten polymer is then forced into a die which shapes the polymer into a continuous profile. After cooling, the extrusion can be cut to standard lengths by a saw or winder.


What are the major applications of plastic extrusion lines?

Plastic Extrusion Lines can be used to create a variety of plastic products such as pipes, sheets, film, rods, profiles, and other special shapes. Our Plastic Extrusion Lines are designed and manufactured by experienced engineers who have over 20 years of experience in the plastics industry. Our Plastic Extrusion Lines are designed to extrude a wide range of thermoplastic materials such as HDPE, LDPE, PVC, PP, PS, etc.

The Plastic Extrusion Line is suitable for processing high-quality products such as threading pipe, hollow wall winding pipe, and corrugated pipe which can be widely used in building water supply and drainage, sewage treatment and warm air heating, etc.

Our Plastic Extrusion Line is designed with advanced technology from Europe. The main components are imported from international famous brands such as Siemens motors and ABB inverters. The main electrical components are made in China but they conform to the same standards as German ones. Our screw and barrel are made of 38CrMoAlA alloy steel which has been nitride treated and we use Bimetallic materials which offer superior wear resistance.


What are the major components of the plastic extrusion line?

The major components of the plastic extrusion line are as follows:

Plastic extruder - including main motor, speed reducer, and screw

Die head - including heating unit, temperature controller, and die head

Cooling trough - including cooling fan, water tank, water pump, spray nozzle, and water pipe

Haul off the device - including traction motor, gearbox, and main structure

Winder - including winding motor, transmission system, and electric control system

A plastic extruder is usually composed of a driving device, feeding system, melting system, extruding system, heating, and cooling system. The driving device is the power source of the whole plastic extrusion line, including the motor and reducer. The feeding system is used to send material into the barrel, including the hopper and screw. The melting system melts raw material in barrels. Extruding system extrudes melted raw material out of the die head by screw rotation to form a certain profile or sheet product with a specific size and shape. The heating and cooling system provides enough heat to melt raw material and cooling water to cool down products or keep the normal temperature during the production process.


How long do deliver the plastic extrusion lines?

One of the most common questions that we are asked is: "How long does it take to get a plastic extrusion line?" It's a reasonable question and one that you should ask.

The simple answer is that it depends. There are many factors that influence the delivery time of a plastic extrusion line including:

The customer's location

The size and complexity of the line

Lead time for components and raw materials

Project requirements

As with all things related to plastic extrusion equipment, we like to work closely with our customers to understand their needs and provide them with the best solution possible. In fact, no two lines are exactly alike. We customize each of our lines based on specific requirements, which means delivery times will vary.


What are the advantages and disadvantages of plastic extrusion lines?

The Plastic Extrusion Line is the major equipment for making construction materials, and the plastic extrusion line has a wide range of applications, such as pipes, profiles, and other products.


Advantages of plastic extrusion line

1.The plastic extrusion line has been widely used in pipe production lines because the process product is continuously formed, it does not need to be cut off, and low cost.

2.The plastic extrusion line is short in the production process chain, it can be connected with the downstream process equipment to form a continuous processing mode.

3.Plastic extrusion line is suitable for continuous large-scale production of high-volume products and can meet the requirements of mass production in modern industry.


Disadvantages of plastic extrusion line:

1. The performance of the plastic extrusion line is uneven, because when the product from different parts of the cross-section is difficult to form a uniform distribution.

2. The dimensional accuracy of the plastic extrusion line is not high because it is difficult to control the temperature field in the die cavity and the change of temperature field in the working cavity of the multi-layer screw extruder cannot be accurately controlled, etc.


What's the difference between plastic extrusion and injection molding?

Plastic extrusion and injection molding are two very different types of processes, but they both have the same goal: creating plastic parts with specific designs and shapes.

Plastic extrusion is a high-volume manufacturing process in which raw plastic material, usually in the form of pellets called plastic resin, is melted and formed into a continuous profile. Extrusion produces items such as pipe/tubing, custom profiles, and weatherstripping.

Plastic injection molding is a process by which granular plastic is fed from a hopper into a heated chamber where it melts and hardens to create parts. The granules are fed into the heating chamber by a screw-type plunger where they melt. As the plunger advances, the melted plastic is forced through a nozzle into the mold cavity. After cooling, the part is ejected from the cavity as the mold opens up.

When it comes to deciding which type of process you need for your business or project, consider that plastic injection molding can be used for creating many different products with complex designs and low production costs (particularly for large volumes). Plastic injection molded parts can be found in everything from computer keyboards to medical devices to automotive dashboards.

The purpose of this article is to help you get a firm grasp of the most common and useful questions asked about plastic extrusion lines. We will also include the answers to these questions, so by the time you finish reading this article; you will have the answers to all your questions. This is an imperative step toward ensuring that you properly research your plastic extrusion line investment and ultimately purchase a great machine.

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