An Overview of Plastic Pipe Extrusion Line

Plastics extrusion is a high-volume manufacturing process in which raw plastic is melted and formed into a continuous profile. Extrusion produces items such as pipe/tubing, weatherstripping, fencing, deck railings, window frames, plastic films and sheeting, thermoplastic coatings, and wire insulation.

This process starts by feeding plastic material (pellets, granules, flakes or powders) from a hopper into the barrel of the 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 shape that hardens during cooling. The process itself is highly technical. However, it can be summed up in just five steps.

Step 1: Raw plastic materials like granules, pellets, or powder are loaded into a hopper and then fed into a long heated cylindrical chamber called an extruder. It is moved through this chamber by a revolving screw. Some extruders can have either one or two revolving screws.

Step 2: The raw materials flow from the hopper down through the feed throat and onto a large spinning screw operating within a horizontal barrel.

Step 3: Not all materials have the same properties, so the raw material is processed by a heating temperature specific to the type of raw material being passed through. At the end of the heated chamber, the molten plastic is forced through a small opening called a die to form the shape of the finished product.

Step 4: As the plastic is extruded from the die, it is fed onto a conveyor belt for cooling. Cooling can happen by air or water. The process is similar to the injection moulding process except that the melted plastic is forced through a die instead of into a mould.

Step 5: The die for an individual plastic profile is designed so that the plastic flows smoothly and evenly from the cylindrical profile of the extruder into the final profile shape. Consistency in this flow is critical to achieving an end product with integrity.

Advantages

A great advantage of extrusion is that profiles such as pipes can be made to any length. If the material is sufficiently flexible, pipes can be made at long lengths even coiling on a reel. Another advantage is the extrusion of pipes with integrated coupler including rubber seal.

What Sevenstar can provide

· PP PE HDPE PVC Corrugated Pipe Extrusion Line

1. This production line can be used to produce corrugated pipes of PE,PP,PVC

2. Plastic single wall corrugated pipes have features of high temperature resistance, resistant to corrosion and abrasion, high intensity, good flexibility, etc

3. The pipes made by our machines can be used in fields, such as auto wire, electric thread passing pipes, circuit of machine tool, protective pipes of lamps and lanterns wire, tubes of air conditioner and washing machine, etc

· Precision Hose Extrusion Line

Production of infusion with a single tube, multi-lumen, casing and other types of precision medical tube

· PVC fiber reinforced hose extrusion line

PVC fiber reinforced hose extrusion line is suitable for the production of PVC fiber reinforced pipe. These kinds of pipe are made of three layers structure. The inner and the outer layers will be made of PVC plastics and the middle layer is made of terylene fiber reinforcednet.

If you are looking for a merchandise of Plastic Pipe Extrusion Line, our company is a good choice for you. Please don't hesitate to contact us now!