Extrusion
A manufacturing process where material is pushed through a shaped opening (die) to create objects with a continuous cross-sectional profile, like pipes, tubes, channels, and weather stripping.
Extrusion is a continuous manufacturing process where raw material (typically plastic or aluminum) is heated and forced through a die -- a shaped opening that determines the cross-sectional profile of the finished product. The material emerges from the die in a continuous length, like toothpaste from a tube, and is then cooled, cut to length, and potentially further processed. If you imagine slicing through the finished product at any point along its length and seeing the same cross-section, that product was likely extruded.
Plastic extrusion produces pipes, tubing, window frames, weather stripping, edge trim, and film/sheet stock. Aluminum extrusion produces structural profiles, heat sinks, window frames, curtain rods, and railing systems. The process is extremely efficient for high-volume production of parts with consistent cross-sections. Tooling costs (the extrusion die) are relatively low compared to injection molds -- typically $500-$5,000 for custom profiles.
For DTC product developers, extrusion is relevant when your product includes tubular, channel, or profile components. Custom aluminum extrusions are popular for product frames, enclosures, and structural elements. Silicone extrusions are used for seals, gaskets, and tubing. Understanding extrusion as a manufacturing option can open up cost-effective design solutions that might not be obvious if you are only thinking in terms of molding and machining.
Why it matters
Extrusion dies are far cheaper than injection molds ($500-$5,000 vs. $5,000-$50,000). If your product can incorporate extruded profiles for structural elements, it can significantly reduce tooling costs.
Practical Tip
Extrusion dies are far cheaper than injection molds ($500-$5,000 vs. $5,000-$50,000). If your product can incorporate extruded profiles for structural elements, it can significantly reduce tooling costs.
You'll hear this when…
When briefing a factory
“"We need the Extrusion process clearly documented in your quality control plan."”
When reviewing samples
“"Can you confirm which Extrusion standard was applied during production of these samples?"”
When placing an order
“"The purchase order includes a clause requiring Extrusion compliance for all production runs."”
Related Terms
Injection Molding
A manufacturing process where molten plastic is injected under high pressure into a steel or aluminum mold cavity, then cooled to form a solid part. It is the most common process for producing plastic components at scale.
Tooling
The molds, dies, jigs, and fixtures required to manufacture a specific product. Tooling is typically a one-time upfront cost that enables mass production of your custom design.
Blow Molding
A manufacturing process for creating hollow plastic parts by inflating a heated plastic tube (parison) inside a mold cavity using air pressure. Used for bottles, containers, and hollow shapes.
Bill of Materials
BOMA comprehensive list of all raw materials, components, sub-assemblies, and quantities needed to manufacture a finished product. The BOM is the foundation of cost estimation and production planning.
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