What is Plastic Extrusion?


Plastic extrusion manufacturing is the high-volume manufacturing process used to produce composite windows, vinyl fencing, freezer gaskets, etc. Keller Plastics is a leading plastic extrusion manufacturer based in Manchester, NH.

Extruders are composed of these components: 

  1. A hopper that holds and inputs raw materials made of plastics to the barrel
  2. A barrel containing a screw driven by a screw drive motor that forces the material to the feedpipe
  3. External heaters to maintain the desired temperature of 240°F or 110°C inside the barrel. 
  4. A die that shapes the material into the desired extrusion profile. 

Common Plastic Extrusion Process

The preferred plastics extrusion process is uncomplicated. The process starts with continuously filling the hopper with solid raw material in the form of pellets, granules or flakes, for instance. The heat generated melts the plastic as it moves through a barrel heated externally to maintain the desired temperature. The molten plastic exits the barrel through a screen reinforced by the breaker plate. When forced through the die, the material assumes the shape of the die opening, finishing the extrusion process. The extrusion profile is cooled to help maintain this shape and prevent damage during later use.

Significance of Plastic Extrusion

Plastic extrusion has several benefits that make it more economical than other manufacturing processes. With plastic extrusion, you can produce products with uniform wall thickness and broader and longer profiles compared to different types of manufacturing. Examples of successfully made products using plastic extrusion include plastic films, bags, piping tubing rods, and weather stripping deck railings.

Customized Plastic Extrusion Capacity

Keller Plastics has been a leader in the industry for custom plastic extrusions. With over forty years of experience in the field, we provide the best quality product. The company offers turnkey extrusion and finishing services to meet the highest standards possible. 

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We Offer:

Profile extrusions – We create any shapes or sizes for your particular needs, whether industrial or consumer.

Tube extrusion – If you are looking for plastic tubes with specific profiles, we are here to help.

Co-extrusion – Using two or more resins to manufacture parts that meet desired performance requirements. 

Crosshead Extrusions – this type of product will be reinforced or encapsulate metal pieces within them.

Contact Keller Plastics Today.

Keller Plastics offers a wide range of quality services in the plastic manufacturing industry, like high volume and superior extrusion. Contact our team today for more information about Keller Plastics’ expertise.