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The process of extrusion has numerous types, and one of them is known as plastic extrusion. In this technique, raw plastic is used and transformed to produce several things such as rods, seals, plastic tubing, adhesive tape and plastic sheets by using equipments like plastic extruders.

Some of the most commonly used plastic items in plastic extrusion are nylon, polycarbonate, acetal, polyethylene, ABS or acrylonitrile butadiene styrene and acrylic.

What are the kinds of plastic extrusion?

1. Blown film extrusion

This process is used when you want to manufacture plastic films to make shopping bags and objects similar to that. It's generally similar to an ordinary extrusion except for the die. In this method, the die used is like an upright cylinder which has a round opening that can be as small as a couple of centimeters in diameter to as large as at least 3 meters. One advantage of this method is the quality variations it can offer.

2. Sheet or film extrusion

In this method, the materials are cooled by pulling them through a number of cooling rolls. They're also able to achieve the preferred surface texture and sheet thickness via this method. A method that follows this certain extrusion process is referred to as thermoforming, in which a sheet is exposed to heat until it turns into soft plastic so you can mold it into any shape. But, if you're going to use vacuum when doing this, the process is known as vacuum forming.

3. Tubing extrusion

In this method, plastic extruders are used to create tubes like medical tubing and drinking straws. It is also like regular extrusion except for the die. In this instance, a mandrel or pin is used to extrude hollow areas. You can use one or several die based on the number of lumens or holes necessary.

4. Compound extrusion

This method uses one or a combination of several polymers to make plastic compounds. You may use powder, liquid or pellets as feeds for injection molding & extrusion. Machinery are very helpful if you choose to use this method. You may get those little laboratory machines or those huge extruders found in large industries.

Those are just 4 of the many extrusion processes known today. They've evolved and enhanced over the years. Each of them has its own pros and cons over the others. Each also requires different types of tools.

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